CLEANING DEVICE

Abstract

A cleaning device, including: a device main body, a drive assembly, a roller, a lifting assembly, and a wastewater collection assembly. The drive assembly is configured to drive the device main body to move along a surface to be cleaned for cleaning by the roller. The lifting assembly is configured to drive the roller to switch between a lowered position and a raised position; in a case where the roller is in the lowered position, the roller contacts the surface to be cleaned; in a case where the roller is in the raised position, the roller is separated from the surface to be cleaned. The wastewater collection assembly includes a water scrapper, and the water scrapper is configured to abut against the roller regardless of whether the roller is in the lowered position or the raised position, for scrapping out wastewater in the roller.

Claims

1. A cleaning device, comprising: a device main body; a drive assembly, connected to the device main body and configured to drive the device main body to move along a surface to be cleaned; a roller, configured to clean the surface to be cleaned; a lifting assembly, connected to the device main body and the roller for driving the roller to switch between a lowered position and a raised position; wherein in a case where the roller is in the lowered position, the roller contacts the surface to be cleaned; in a case where the roller is in the raised position, the roller is separated from the surface to be cleaned; and a wastewater collection assembly; wherein the wastewater collection assembly comprises a water scrapper, and the water scrapper is configured to abut against the roller regardless of whether the roller is in the lowered position or the raised position, for scrapping out wastewater in the roller.

2. The cleaning device according to claim 1, wherein the water scrapper is disposed at an intersection point between the roller when in the raised position and the roller when in the lowered position.

3. The cleaning device according to claim 1, wherein the lifting assembly comprises a roller bracket and a lifting motor; the roller is rotatably connected to the roller bracket, and the roller bracket is rotatably connected to the device main body; the lifting motor is connected to the roller bracket in a transmission manner and configured to drive the roller bracket to rotate relative to the device main body, for driving the roller to switch between the lowered position and the raised position.

4. The cleaning device according to claim 1, wherein the wastewater collection assembly further comprises a wastewater collection trough configured to collect the wastewater scrapped out by the water scrapper; wherein the cleaning device further comprises a wastewater tank and a wastewater suction assembly; the wastewater tank is connected to the device main body and defines an accommodation space for containing the wastewater; the wastewater collection trough is connected to the wastewater tank and in communication with the accommodation space; the wastewater suction assembly is connected to the wastewater tank and configured to draw the wastewater in the wastewater collection trough into the accommodation space.

5. The cleaning device according to claim 4, wherein a filter member is arranged within the wastewater collection trough, and the filter member is configured to filter the wastewater scraped out by the water scrapper; the filter member is detachably connected to the wastewater collection trough.

6. The cleaning device according to claim 4, wherein the water scrapper and the wastewater collection trough are in a one-piece structure.

7. The cleaning device according to claim 4, wherein the wastewater tank is arranged with a wastewater inlet and a drain outlet, and the wastewater inlet and the drain outlet are both in communication with the accommodation space; the wastewater suction assembly is configured to create a negative pressure within the wastewater tank to draw the wastewater collected by the wastewater collection assembly through the wastewater inlet into the accommodation space; wherein the cleaning device further comprises a wastewater drainage assembly connected to the wastewater tank; the wastewater drainage assembly is configured to create a positive pressure within the wastewater tank to expel the wastewater from the accommodation space through the drain outlet.

8. The cleaning device according to claim 7, wherein the wastewater tank is arranged with at least one connection port, and the at least one connection port is in communication with the accommodation space; the wastewater suction assembly comprises a wastewater suction pump and a gas inlet pipe connected to the wastewater suction pump; the drainage assembly comprises a wastewater drainage pump and a gas outlet pipe connected to the wastewater drainage pump; wherein the at least one connection port is a connection port, and the gas inlet pipe and the gas outlet pipe are connected to the connection port through a three-way connector or a three-way control valve; or wherein the at least one connection port is two connection ports; the gas inlet pipe is connected to one of the two connection ports, and the gas outlet pipe is connected to the other of the two connection ports.

9. The cleaning device according to claim 8, wherein the wastewater suction assembly further comprises a first check valve disposed on a gas outlet of the wastewater suction pump; the first check valve is configured to allow gas to pass through the gas outlet of the wastewater suction pump and be discharged outside, while restricting external gas from entering through the gas outlet; the wastewater drainage assembly further comprises a second check valve disposed on the gas outlet pipe; the second check valve is configured to allow gas to flow from the wastewater drainage pump into the accommodation space, while restricting gas from flowing toward the wastewater drainage pump.

10. The cleaning device according to claim 8, wherein the cleaning device further comprises a filter assembly detachably connected to the wastewater tank and disposed between the accommodation space and the connection port.

11. The cleaning device according to claim 7, wherein the wastewater tank comprises a wastewater suction passage and a wastewater drainage passage; the accommodation space is in communication with the wastewater inlet through the wastewater suction passage, and the accommodation space is in communication with the drain outlet through the wastewater drainage passage; in a case where the negative pressure is generated within the wastewater tank by the wastewater suction assembly, the wastewater collected by the wastewater collection assembly enters the accommodation space through the wastewater suction passage; in a case where the positive pressure is generated within the wastewater tank by the wastewater drainage assembly, the wastewater contained in the accommodation space flows through the wastewater drainage passage to the drain outlet and is discharged from the wastewater tank through the drain outlet; wherein the wastewater suction passage comprises a water inlet check valve assembly, and the water inlet check valve assembly is configured to allow fluid to flow from the wastewater inlet into the accommodation space, while restricting the fluid from flowing from the accommodation space into the wastewater inlet; the wastewater drainage passage comprises a water outlet check valve assembly, and the water outlet check valve assembly is configured to allow fluid to flow from the wastewater tank toward the drain outlet, while restricting the fluid from flowing from the drain outlet into the accommodation space.

12. The cleaning device according to claim 11, wherein the wastewater tank defines a first mounting slot matching the water inlet check valve assembly and a second mounting slot matching the water outlet check valve assembly; the water inlet check valve assembly is configured to be detachably inserted into the first mounting slot, and the water outlet check valve assembly is configured to be detachably inserted into the second mounting slot.

13. The cleaning device according to claim 8, wherein the wastewater tank comprises a lower housing, and a first protrusion and a second protrusion that are disposed on a side of the lower housing away from the surface to be cleaned; the first protrusion and the second protrusion are separated by a through space; the accommodation space comprises a first accommodation space inside the lower housing, a second accommodation space inside the first protrusion, and a third accommodation space inside the second protrusion; wherein the second accommodation space and the third accommodation space are both in communication with the first accommodation space.

14. The cleaning device according to claim 13, wherein a connecting pipe is further arranged inside the wastewater tank; an end of the connecting pipe is disposed within the second accommodation space, and another end of the connecting pipe is disposed within the third accommodation; the connecting pipe is configured to maintain air pressure in the second accommodation space and the third accommodation space in equilibrium.

15. The cleaning device according to claim 4, wherein the wastewater tank is detachably connected to the device main body; the wastewater tank is arranged with at least two latch assemblies, which are spaced apart and mutually independent; each latch assembly comprises a latch; the device main body defines a latch slot that match the latch; the latch is configured to switch between a locked position and an unlocked position; in a case where the latch is in the locked position, the latch engages with the latch slot; in a case where the latch is in the unlocked position, the latch is separated from the latch slot.

16. The cleaning device according to claim 15, wherein the wastewater tank defines a through hole, and the latch is movably arranged in the through hole; the latch comprises a button portion and a latching portion connected to the button portion; wherein the latch assembly further comprises a support member and an elastic member; the support member is connected to the wastewater tank, and the elastic member is disposed between the support member and the latch; the elastic member is configured to push the latch to return from the unlocked position to the locked position; the button portion is configured to, in response to being pressed, drive the latch to move from the locked position to the unlocked position; in a case where the latch is in the locked position, the latching portion engages with the latch slot; in a case where the latch is in the unlocked position, the latching portion is separated from the latch slot.

17. The cleaning device according to claim 16, wherein the wastewater tank comprises a lower housing, and a first protrusion and a second protrusion that are disposed on a side of the lower housing away from the surface to be cleaned; the first protrusion and the second protrusion are separated by a through space; a first accommodation space is defined inside the lower housing, a second accommodation space is defined inside the first protrusion, and a third accommodation space is defined inside the second protrusion; wherein the second accommodation space and the third accommodation space are both in communication with the first accommodation space; wherein, at least one of the at least two latch assemblies is arranged on the first protrusion; at least another one of the at least two latch assemblies is arranged on the second protrusion.

18. The cleaning device according to claim 17, wherein a guide protrusion is arranged on one of the device main body and the wastewater tank, and a guide groove is defined on the other of the device main body and the wastewater tank; the guide protrusion is configured to be slidably engaged with the guide groove; the guide groove comprises two guide grooves, one of the two guide grooves is defined on the first protrusion, and the other of the two guide grooves is defined on the second protrusion; the two guide grooves are in communication with the through space; the guide protrusion comprises two guide protrusions arranged on the device main body, and the two guide protrusions match the two guide grooves in a one-to-one correspondence.

19. The cleaning device according to claim 4, wherein a span of the wastewater tank in an axial direction of the roller is greater than or equal to a length of the roller in the axial direction.

20. The cleaning device according to claim 4, wherein the wastewater tank is disposed on a rear end of the device main body, and a direction in which the wastewater tank is mounted on the device main body is parallel to a forward-moving direction of the cleaning device.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following drawings are included herein as part of the present disclosure for the purpose of understanding the same. The drawings illustrate embodiments of the present disclosure and their descriptions, and are intended to explain the apparatus and principles of the present disclosure.

[0014] FIG. 1 is a perspective structural schematic view of a cleaning device according to some embodiments.

[0015] FIG. 2 is a perspective schematic view illustrating a cross section of a roller assembly, a wastewater collection assembly, and a wastewater tank as shown in FIG. 1.

[0016] FIG. 3 is a perspective structural schematic view of a roller bracket as shown in FIG. 2.

[0017] FIG. 4 is a perspective structural schematic view of a wastewater collection assembly and a wastewater tank of the cleaning device as shown in FIG. 1.

[0018] FIG. 5 is a perspective structural schematic view of a wastewater collection assembly and a wastewater tank of the cleaning device as shown in FIG. 1.

[0019] FIG. 6 is an exploded schematic view of the wastewater collection assembly shown in FIGS. 4 and 5.

[0020] FIG. 7 is a cross-sectional schematic view of the wastewater collection assembly shown in FIGS. 4 and 5.

[0021] FIG. 8 is a cross-sectional schematic view of the cleaning device when the roller assembly as shown in FIG. 2 is in a lowered position.

[0022] FIG. 9 is a cross-sectional schematic view of the cleaning device when the roller assembly as shown in FIG. 2 is in a raised position.

[0023] FIG. 10 is a cross-sectional schematic view of the cleaning device when the roller assembly as shown in FIG. 2 is in the lowered position and is in the raised position.

[0024] FIG. 11 is a perspective structural schematic view of the cleaning device when the wastewater tank is separated from a device main body as shown in FIG. 1.

[0025] FIG. 12 is an exploded schematic view of the wastewater tank as shown in FIG. 11.

[0026] FIG. 13 is an overall structural schematic view of the wastewater tank as shown in FIG. 11.

[0027] FIG. 14 is an overall structural schematic view of the wastewater tank as shown in FIG. 11.

[0028] FIG. 15 is a structural schematic view of a protruding portion on the device main body as shown in FIG. 11.

[0029] FIG. 16 is a partial enlarged view of area A circumscribed in FIG. 15.

[0030] FIG. 17 is a cross-sectional schematic view of a first guide protrusion (second guide protrusion) and a first guide groove (second guide groove) when the wastewater tank as shown in FIG. 11 is inserted into the device main body.

[0031] FIG. 18 is a cross-sectional schematic view of a connection between the device main body and the wastewater tank when the wastewater tank as shown in FIG. 11 is inserted into the device main body.

[0032] FIG. 19 is a cross-sectional schematic view of a first latch as shown in FIG. 13 along a direction perpendicular to a surface to be cleaned.

[0033] FIG. 20 is a perspective structural schematic view of the first latch as shown in FIG. 19.

[0034] FIG. 21 is a cross-sectional schematic view of a first latch as shown in FIG. 13 along a direction parallel to a surface to be cleaned.

[0035] FIG. 22 is a cross-sectional schematic view of a first latch as shown in FIG. 11 when the first latch on the wastewater tank is engaged with a first latch slot on the device main body.

[0036] FIG. 23 is a cross-sectional schematic view of a first latch as shown in FIG. 11 when the first latch on the wastewater tank is disengaged from a first latch slot on the device main body.

[0037] FIG. 24 is a perspective structural schematic view of a suction and drainage assembly, a clean water tank, and a clean water pump assembly of the cleaning device as shown in FIG. 1.

[0038] FIG. 25 is a cross-sectional schematic view of the wastewater tank as shown in FIG. 1.

[0039] FIG. 26 is an exploded view illustrating a cross section of the wastewater tank as shown in FIG. 1;

[0040] FIG. 27 is a cross-sectional schematic view of the wastewater tank as shown in FIG. 1.

[0041] FIG. 28 is an exploded view illustrating a cross section of the wastewater tank as shown in FIG. 1.

[0042] FIG. 29 is a cross-sectional schematic view of a water outlet check valve assembly as shown in FIG. 28.

[0043] FIG. 30 is a perspective structural schematic view of a filter assembly as shown in FIG. 25.

[0044] FIG. 31 is a cross-sectional structural schematic view of the filter assembly as shown in FIG. 26.

[0045] FIG. 32 is a perspective structural schematic view of a water inlet check valve assembly as shown in FIG. 28.

[0046] FIG. 33 is a cross-sectional schematic view of the water inlet check valve assembly as shown in FIG. 32.

[0047] FIG. 34 is a perspective structural schematic view of the water inlet check valve assembly as shown in FIG. 32.

[0048] FIG. 35 is an internal structural schematic view of the water inlet check valve assembly as shown in FIG. 32.

[0049] FIG. 36 is a perspective structural schematic view of a water outlet check valve assembly as shown in FIG. 28.

[0050] FIG. 37 is a perspective structural schematic view of the water outlet check valve assembly as shown in FIG. 36.

[0051] FIG. 38 is a cross-sectional schematic view of the water outlet check valve assembly as shown in FIG. 36.

[0052] FIG. 39 is a cross-sectional schematic view of a water outlet check valve assembly according to other embodiments of the present disclosure.

DETAILED DESCRIPTION

[0053] In the following description, specific details are provided to provide a more thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure may be practiced without one or more of these details. In other examples, for the sake of clarity and to avoid confusion with the present disclosure, certain technical features that are well known to those skilled in the art have not been described.

[0054] It is understood that the present disclosure may be implemented in various forms and should not be construed as limited to the embodiments presented herein. Rather, the provision of these embodiments is intended to make the disclosure complete and thorough and to convey the scope of the present disclosure to those skilled in the art. In the accompanying drawings, for clarity, the dimensions of layers and regions and their relative dimensions may be exaggerated. The same reference numerals refer to the same elements throughout.

[0055] It is understood that although terms such as first, second, third, etc., may be used to describe various elements, components, regions, layers, and/or parts, these elements, components, regions, layers, and/or parts should not be limited by these terms. These terms are merely intended to distinguish one element, component, region, layer, or part from another element, component, region, layer, or part. Therefore, without departing from the teachings of the present disclosure, a first element, component, region, layer, or part discussed below may be denoted as a second element, component, region, layer, or part.

[0056] Spatial relationship terms such as under . . . below . . . on bottom of . . . beneath . . . above . . . on . . . etc., are used here for convenience to describe the relationship between an element or feature shown in the drawings and other elements or features. It should be understood that, except for the orientation shown in the drawings, spatial relationship terms are intended to include different orientations of the devices during use and operation.

[0057] Cross-sectional views of schematic diagrams of ideal embodiments (and intermediate structures) of the present disclosure are referenced to describe the embodiments. Thus, variations in the shapes shown due to, for example, manufacturing techniques and/or tolerances may be anticipated. Therefore, the embodiments of the present disclosure should not be limited to the specific shapes shown herein, but rather include shape deviations caused by, for example, manufacturing. Thus, the drawings are essentially schematic and their shapes are not intended to show the actual shapes of the devices and are not intended to limit the scope of the present disclosure. The embodiments of the present disclosure provide a cleaning device, including: [0058] a device main body; [0059] a drive assembly, connected to the device main body, for driving the device main body to move along a surface to be cleaned; [0060] a roller assembly, configured to clean the surface to be cleaned; [0061] a wastewater collection assembly, abutting against the roller assembly, for scraping out and collecting wastewater from the roller assembly; [0062] a wastewater tank, having an accommodation space for containing the wastewater; where the wastewater tank is arranged with a wastewater inlet and a drain outlet, and the wastewater inlet and the drain outlet are both in communication with the accommodation space; [0063] a wastewater suction assembly, connected to the wastewater tank and configured to create a negative pressure within the wastewater tank to draw the wastewater collected by the wastewater collection assembly through the wastewater inlet into the accommodation space; and [0064] a wastewater drainage assembly, connected to the wastewater tank and configured to create a positive pressure within the wastewater tank to expel the wastewater from the accommodation space through the drain outlet.

[0065] According to the cleaning device of the present disclosure, by creating negative and positive pressure inside the wastewater tank through the wastewater suction assembly and wastewater drainage assembly to draw in or expel the wastewater, direct contact between the wastewater suction assembly as well as the wastewater drainage assembly and the wastewater may be avoided. This reduces the risk of blockages or damage to the wastewater suction assembly and the wastewater drainage assembly caused by hair, particles, and other impurities in the wastewater, thereby significantly extending the service life of the pump. Additionally, by generating positive pressure within the wastewater tank via the wastewater drainage assembly, the wastewater can be automatically discharged. This enables the cleaning device to actively discharge wastewater when the cleaning device reaches a designated position (e.g., when it arrives at a base station), thereby expanding application scenarios of the cleaning device. in this way, users no longer need to manually clean the wastewater, effectively reducing user operations. Furthermore, there is no need to rely on specific wastewater discharge structures on the base station for wastewater discharge, thereby effectively lowering the cost of the base station.

[0066] Referring to FIGS. 1-38, a cleaning device according to some embodiments is provided. The cleaning device includes a device main body 100, a drive assembly 200, a side sweeping assembly 300, a roller assembly 400, a wastewater collection assembly 500, a wastewater tank 600, a wastewater suction and drainage assembly 700, a clean water tank 800, and a clean water pump assembly 900.

[0067] The device main body 100 is a shell structure with an internal accommodation space, and other components or structures of the cleaning device are directly or indirectly connected to the device main body 100.

[0068] The drive assembly 200 is configured to drive the device main body 100 to move along a surface to be cleaned. In some embodiments, the drive assembly 200 includes a drive motor, a travel wheel 210, and a swivel wheel 220. The swivel wheel 220 is rotatably connected to the device main body 100 and disposed on a front portion of the device main body 100 facing the surface to be cleaned. It should be noted that the front portion (front side) in the present disclosure refers to a portion facing the moving direction of the cleaning device (i.e., a side facing the moving direction of the cleaning device); the rear portion (rear side) refers to a portion away from the moving direction of the cleaning device (i.e., a side away from the moving direction of the cleaning device). The travel wheels 210 may be two in number and rotatably connected to the device main body 100, disposed on a middle portion of the device main body 100 facing the surface to be cleaned. The travel wheels 210 and the swivel wheel 220 are arranged in an isosceles triangle on a side of the device main body 100 facing the surface to be cleaned. The drive motor is disposed inside the device main body 100 and is connected to the travel wheels 210 in a transmission manner, driving the travel wheels 210 to rotate and thereby moving the device main body 100 along the surface to be cleaned. In other embodiments, the drive assembly 200 may include a drive motor and a track wheel, where the track wheel is rotatably connected to the device main body 100 and disposed on a side of the device main body 100 facing the surface to be cleaned, and the drive motor is connected to the track wheel in a transmission manner, driving the track wheel to rotate, thereby driving the device main body 100 to move on the surface to be cleaned.

[0069] The side sweeping assembly 300 includes a side sweeping body and a side sweeping motor. There may be two side sweeping bodies provided, which are rotatably arranged on both sides of the front portion of the device main body 100 facing the surface to be cleaned. Each side sweeping body includes multiple bristles, and the bristles of the side sweeping body extend beyond an outer contour of the device main body 100, thereby expanding the cleaning range of the cleaning device and facilitating cleaning of corners and other locations. There may be two side sweeping motors provided, which are arranged inside the device main body 100, each for driving a corresponding sweeping body to rotate. Alternatively, a single side sweeping motor may be provided, with both the side sweeping bodies sharing the motor. The side sweeping motor(s) is/are configured to drive the two side sweeping bodies to rotate in opposite directions, thereby gathering dust from both sides of the cleaning device toward the center for cleaning by the dry-cleaning component-roller assembly 400. In some embodiments, the cleaning device may include only one side sweeping body and one side sweeping motor.

[0070] The roller assembly 400 includes a roller 410 and a roller motor. The roller 410 includes a cylinder body and a cleaning cloth. The cylinder body may be cylindrical in shape and have an internal accommodation space. The cleaning cloth wraps around a peripheral side of the cylinder body, and the cleaning cloth may be made of a material with certain water absorption properties. The roller 410 is rotatably arranged on the side of the device main body 100 facing the surface to be cleaned. When the cleaning device moves over the surface to be cleaned, the cleaning cloth on the roller 410 contacts the surface to be cleaned. The roller motor drives the roller 410 to rotate around its central axis, enabling the roller 410 to friction the surface to be cleaned and remove dirt from it during rotation. In some embodiments, the roller 410 is disposed behind the travel wheels 210, and an axial length of the roller 410 is greater than the distance between the two travel wheels 210, such that the roller 410 can clean the tracks left by the travel wheels 210. In the embodiments, the cylinder body has the accommodation space, and the roller motor is disposed in the accommodation space of the cylinder body. In other embodiments, the roller motor may be disposed within the device main body 100 and be connected to the cylinder body in a transmission manner.

[0071] Referring to FIGS. 2, 8, and 9, in some embodiments, the cleaning device further includes a lifting assembly, which includes a roller bracket 420 and a lifting motor. Two ends of the roller 410 (i.e., two ends of the cylinder body) are rotatably connected to the roller bracket 420. The roller motor is configured to drive the roller 410 to rotate relative to the roller bracket 420. The roller bracket 420 is fixedly arranged with a connection arm 423, and the roller bracket 420 is rotatably connected to the device main body 100 via the connection arm 423. The lifting motor is connected to the connection arm 423 of the roller bracket 420 in a transmission manner, driving the connection arm 423 to rotate relative to the device main body 100, thereby driving the roller bracket 420 to rotate relative to the device main body 100. When the roller bracket 420 rotates relative to the device main body 100, the relative position between the roller 410 connected to the roller bracket 420 and the surface to be cleaned also changes accordingly. In this way, the lifting assembly can switch the roller 410 between a lowered position and a raised position. When the roller 410 is in the lowered position, the cleaning cloth on the roller 410 contacts the surface to be cleaned, and the rotation of the roller 410 effectively cleans the dirt on the surface to be cleaned; when the roller 410 is in the raised position, the cleaning cloth on the roller 410 is separated from the surface to be cleaned and maintains a certain distance from it. Thus, when the cleaning device moves over surfaces such as carpet surfaces that do not require cleaning by the roller 410, the lifting assembly can switch the roller 410 from the lowered position to the raised position, preventing the cleaning cloth on the roller 410 from contaminating the surfaces. In some embodiments, the lifting assembly may not be provided, and the cleaning cloth on the roller 410 remains in contact with the surface to be cleaned.

[0072] Referring to FIGS. 2 and 3, in some embodiments, the roller bracket 420 has a cavity inside, a side of the roller bracket 420 away from the roller 410 is arranged with a clean water inlet 421 in communication with the cavity, and side of the roller bracket 420 facing the roller 410 is arranged with a clean water outlet 422 in communication with the cavity. The clean water pump assembly 900 is connected to the clean water tank 800 and the clean water inlet 421 to pump clean water from the clean water tank 800 through the clean water inlet 421 into the cavity, and then spray the clean water through the clean water outlet 422 onto the cleaning cloth on the roller 410 to moisten the cleaning cloth, thereby achieving wet cleaning of the surface to be cleaned. In some embodiments, the clean water outlet 422 includes multiple water discharge holes distributed at equal intervals along the axial direction of the roller 410, thereby uniformly spraying the clean water onto the surface of the cleaning cloth. In the embodiments, a water discharge structure is integrated into the roller bracket 420, simplifying the structure of the cleaning device and reducing its volume. In other embodiments, the water discharge structure may be independent of the roller bracket 420.

[0073] The wastewater collection assembly 500 is configured to abut against the cleaning cloth on the roller 410 to scrape and collect wastewater from the cleaning cloth when the roller 410 rotates. Referring to FIGS. 4-7, in some embodiments, the wastewater collection assembly 500 includes a wastewater collection trough 510. The wastewater collection trough 510 is arranged with a water scrapper 511 on a side facing the roller 410. The water scrapper 511 extends along the axial direction of the roller 410 on the wastewater collection trough 510, and the length of the water scrapper 511 along the axial direction of the roller 410 is equal to or slightly greater than the length of the cleaning cloth along the axial direction of the roller 410. The water scrapper 511 is configured to abut against the cleaning cloth on the roller 410 (with an interference fit), such that when the roller 410 rotates, wastewater can be scraped out through the scraping action with the cleaning cloth and flow into the wastewater collection trough 510.

[0074] In some embodiments, the wastewater collection trough 510 is detachably connected to the wastewater tank 600, and the wastewater tank 600 is detachably connected to the device main body 100. Specifically, the wastewater tank 600 defines a containment groove 614 for mounting the wastewater collection trough 510, and the wastewater collection trough 510 is detachably connected to the wastewater tank 600 via magnetic attraction. A side of the wastewater collection trough 510 facing the wastewater tank 600 is arranged with a metal plate 514, and the wastewater tank 600 is arranged with a magnet 612 at a corresponding position of the metal plate 514. When the wastewater collection trough 510 is mounted onto the wastewater tank 600, the metal plate 514 on the wastewater collection trough 510 magnetically attaches to the magnet 612 on the wastewater tank 600, thereby securing the wastewater collection trough 510 in place and providing a tactile confirmation of proper alignment. When it is necessary to disassemble the wastewater collection trough 510, the wastewater collection trough 510 can be pulled out from either side of the wastewater collection trough 510. The magnetic connection design enables quick assembly and disassembly of the wastewater collection trough 510. In some embodiments, the magnet 612 may be arranged on the wastewater collection trough 510, the metal plate 514 may be arranged on the wastewater tank 600; or the magnets 612 may be arranged on both the wastewater collection trough 510 and the wastewater tank 600. In some embodiments, the wastewater collection trough 510 may be connected to the wastewater tank 600 via a snap-fit connection or other suitable detachable connection method.

[0075] In some embodiments, a top of the wastewater collection trough 510 defines an opening, and the wastewater scraped out by the water scrapper 511 enters the wastewater collection trough 510 through the opening at the top of the wastewater collection trough 510. A bottom of the wastewater collection trough 510 is arranged with a wastewater outlet 513, and the wastewater tank 600 is arranged with a wastewater inlet 611 corresponding to the wastewater outlet 513. When the wastewater collection trough 510 is connected to the wastewater tank 600, the wastewater outlet 513 on the wastewater collection trough 510 is in communication with the wastewater inlet 611 on the wastewater tank 600. The suction and drainage assembly 700 is connected to the wastewater tank 600 and can generate a negative pressure inside the wastewater tank 600. This allows wastewater from the wastewater collection trough 510 to be sucked into the wastewater tank 600 through the wastewater outlet 513, the wastewater inlet 611, and a water inlet channel 613 that is in communication with the wastewater inlet 611, thereby preventing wastewater from overflowing from the wastewater collection trough 510.

[0076] In some embodiments, the water scrapper 511 is integrally formed with the wastewater collection trough 510 (e.g., integrally injection molded), and the water scrapper 511 is a protrusion disposed at the top of a side wall of the wastewater collection trough 510 facing the roller 410, extending toward the roller 410 and disposed on a side of the side wall away from the surface to be cleaned. In other embodiments, the water scrapper 511 and the wastewater collection trough 510 may be two separate components, for example, the water scrapper 511 may be a scrapping plate extending along the axial direction of the roller 410, which may be fixedly or detachably connected to the wastewater collection trough 510 or the wastewater tank 600, as long as it can come into contact with the cleaning cloth on the roller 410 to squeeze out the wastewater from the cleaning cloth and guide the wastewater into the wastewater collection trough 510. In some embodiments, the cleaning device may be arranged with only the water scrapper 511 without the wastewater collection trough 510. For example, the water scrapper 511 may contact the cleaning cloth to squeeze out wastewater from the cleaning cloth and guide the wastewater directly into the wastewater tank 600.

[0077] Referring to FIGS. 8-9, in some embodiments, the lifting assembly can drive the roller 410 to switch between the lowered position and the raised position, and the water scrapper 511 is configured to remain in contact with the roller 410 when the roller 410 is in either the raised position or the lowered position. In this way, regardless of whether the roller 410 is in the raised position or the lowered position, as long as the roller 410 rotates, the water scrapper 511 can scrape off the wastewater from the cleaning cloth, thereby cleaning the cleaning cloth, i.e., achieving real-time self-cleaning of the cleaning cloth. Referring to FIG. 10, further, in some embodiments, the roller 410 in the raised position and the roller 410 in the lowered position partially intersect in space, and the water scrapper 511 is disposed at an intersection point b between the roller 410 in the raised position and the roller 410 in the lowered position, where the intersection point b is also the spatial overlap position between the cleaning cloth on the roller 410 in the raised position and the cleaning cloth on the roller 410 in the lowered position. The water scrapper 511 is positioned at the intersection point b to ensure that the water scrapper 511 can abut against the roller 410 when it is in either the raised position or lowered position.

[0078] In some embodiments, the water scrapper 511 may be configured to only abut against the cleaning cloth on the roller 410 in the lowered position, and not with the cleaning cloth on the roller 410 in the raised position, such that during the cleaning process of the roller 410 on the surface to be cleaned, the wastewater and other contaminants in the cleaning cloth can be scraped off, and achieve real-time self-cleaning of the cleaning cloth during the cleaning process of the roller 410 on the surface to be cleaned, thereby effectively improving the cleaning effect of the roller 410 on the surface to be cleaned. In some embodiments, the water scrapper 511 may be configured to only abut against the cleaning cloth on the roller 410 in the raised position, and not abut against the cleaning cloth on the roller 410 in the lowered position. With this configuration, the roller 410 in the lowered position may be controlled to clean the surface to be cleaned at a slower speed (e.g., one rotation every 3 minutes or one rotation every 5 minutes, etc.). After the roller 410 completes one rotation, the lifting assembly switches the roller 410 to the raised position, and the roller 410 is then controlled to rotate at a high speed multiple times to scrape off the wastewater and other contaminants from the cleaning cloth via the water scrapper 511, thereby cleaning the cleaning cloth. After the cleaning cloth is cleaned, the roller 410 is switched to the lowered position via the lifting assembly and continues to clean the surface to be cleaned at a slower speed. This process is repeatedly performed until the surface to be cleaned is fully cleaned. This cleaning method, compared to the roller 410 maintaining a high rotational speed throughout the cleaning process, effectively reduces the energy consumption of the cleaning device and improves its runtime.

[0079] Referring to FIGS. 6-8, in some embodiments, the cleaning device further includes an attachment portion 512, which is disposed below the water scrapper 511. The attachment portion 512 has an arcuate surface for maintaining contact with the cleaning cloth on the roller 410. This arcuate surface allows water that leaks or overflows from below the water scrapper 511 to be reabsorbed into the cleaning cloth (absorbed and carried away by the cleaning cloth), thereby preventing wastewater from leaking from below the water scrapper 511 onto the surface to be cleaned, which could affect cleaning effectiveness and user experience. It should be noted that the term attachment here may include slight interference fit. In some embodiments, the attachment portion 512 is a side wall of the wastewater collection trough 510 facing the roller 410, and the surface of this side wall facing the roller 410 is formed into an arcuate surface with the same or similar curvature as the peripheral side surface of the roller 410. When the roller 410 is in the lowered position, the attachment portion 512 is in close contact with the roller 410, and the water scrapper 511, the attachment portion 512, and the wastewater collection trough 510 are integrally formed. In some embodiments, the attachment portion 512 and the wastewater collection trough 510 may be two separate components. For example, the attachment portion 512 may be an arc-shaped plate with the same or similar curvature as the peripheral side surface of the roller 410, which may be integrally formed with the water scrapper 511, or may be fixedly or detachably connected to the wastewater collection trough 510 or the wastewater tank 600, as long as it can contact the cleaning cloth on the roller 410 below the water scrapper 511 to allow water leaking or overflowing below the water scrapper 511 to be reabsorbed into the cleaning cloth. In some embodiments, the attachment portion 512 may be separately arranged from the water scrapper 511.

[0080] Referring to FIGS. 6-8, in some embodiments, the wastewater collection assembly 500 further includes a filter member, which is detachably disposed within the wastewater collection trough 510 for filtering the wastewater scraped out by the water scrapper 511 to prevent blockage of the wastewater outlet 513 or the wastewater inlet 611. The filter member includes a filter mesh bracket 520 and a filter mesh 530. The filter mesh bracket 520 is detachably connected to the wastewater collection trough 510, specifically, a side wall of the filter mesh bracket 520 overlaps and/or snaps into an edge of the opening at the top of the wastewater collection trough 510, such that the wastewater scraped out by the water scrapper 511 first enters the filter mesh bracket 520, then enters the wastewater collection trough 510, and finally flows through the wastewater outlet 513 at the bottom of the wastewater collection trough 510 into the wastewater tank 600. The filter mesh 530 is fixed or detachably arranged on the filter mesh bracket 520 to filter wastewater entering the filter mesh bracket 520, retaining hair, particles, and other impurities in the wastewater on the filter mesh 530 to prevent blockage of the wastewater outlet 513 and the internal piping of the wastewater tank 600. In some embodiments, the filter mesh 530 may be integrally molded with the filter mesh bracket 520, with the filter mesh 530 serving as a bottom wall of the filter mesh bracket 520; in some embodiments, the filter mesh 530 may be detachably connected to the filter mesh bracket 520 via snap-fit, screw connections, or other methods. In the above embodiments, users can conveniently remove the filter mesh bracket 520 (or further remove the filter screen 530 from the filter mesh bracket 520) to clean or replace the filter screen 530. In some embodiments, the wastewater collection tank 510 may not include the filter mesh bracket 520 and the filter mesh 530. In some embodiments, the filter mesh bracket 520 and the filter mesh 530 may be replaced with other filtering components mounted in the wastewater collection tank 510 that can filter wastewater entering the wastewater collection tank 510. Those skilled in the art may configure these components as needed.

[0081] Referring to FIG. 8, in some embodiments, the rotational direction a of the roller 410 (counterclockwise in FIG. 8) is opposite to the rotational direction of the travel wheel 210 (or track wheel) (clockwise in FIG. 8). In this way, the dirt scraped off the roller 410 by the water scrapper 511 can smoothly enter the wastewater collection trough 510 and effectively prevent the dirt on the roller 410 from flowing onto the clean surface. Furthermore, the relative movement speed between the roller 410 and the surface to be cleaned is superimposed, increasing the contact time between the cleaning cloth and the surface to be cleaned, thereby effectively improving the cleaning effect on the surface to be cleaned. In some embodiments, the rotational direction a of the roller 410 (counterclockwise in FIG. 8) may be the same as the travel direction of the cleaning device, i.e., the same as the rotational direction of the travel wheel 210. In other words, the rotational direction of the travel wheel 210 in FIG. 8 may be configured to rotate clockwise. In this case, the wastewater collection assembly may be arranged in front of the roller 410.

[0082] Referring to FIGS. 11-22, in some embodiments, the wastewater tank 600 includes a lower housing 610 and an upper housing 620; an upper side of the lower housing 610 (i.e., the side opposite the surface to be cleaned) has an opening, and the upper housing 620 is connected to the upper side of the lower housing 610 and covers the opening, thereby defining an accommodation space between the lower housing 610 and the upper housing 620, which is configured to accommodate wastewater. A wastewater inlet 611 and a water inlet channel 613, which are in communication with the wastewater outlet 513 on the wastewater collection trough 510, are arranged on the lower housing 610 and are in communication with the accommodation space.

[0083] In some embodiments, the span of the wastewater tank 600 in the width direction of the cleaning device (i.e., the maximum distance in the left-right direction of the cleaning device in FIG. 11) is greater than or equal to the span of the roller 410 and the travel wheels 210 in the width direction of the cleaning device, i.e., greater than or equal to the length of the roller 410 along its axis direction and greater than or equal to the distance between the outer end faces of the two travel wheels 210, thereby fully utilizing the space on the cleaning device and increasing the volume of the wastewater tank 600.

[0084] In some embodiments, the upper housing 620 includes a first protrusion 621, a second protrusion 622, and a wastewater tank cover 623 disposed between the first protrusion 621 and the second protrusion 622. The wastewater tank cover 623 is rotatably connected to the lower housing 610, allowing the accommodation space between the lower housing 610 and the upper housing 620 to be opened or closed by rotating the wastewater tank cover 623, thereby enabling the wastewater in the wastewater tank 600 to be drained or the interior of the wastewater tank 600 to be cleaned. The wastewater tank cover 623 is arranged with a handle 626 and defines a handle groove matching the shape of the handle 626. The handle groove is configured to accommodate the handle 626, and when the handle 626 is disposed in the handle groove, an upper surface (i.e., the surface opposite the surface to be cleaned) of the handle 626 is flush with or below the upper surface of the wastewater tank cover 623. The handle 626 is U-shaped and its two ends are pivotally connected to the wastewater tank cover 623. For clarity, the wastewater tank cover 623 is defined as having a free side and a connection side, with the connection side pivotally connected to the lower housing 610. The connection point between the handle 626 and the wastewater tank cover 623 is closer to the free side of the wastewater tank cover 623, allowing the handle 626 to be rotated out of the handle groove, and then by pulling the handle 626, the wastewater tank cover 623 can be rotated relative to the lower housing 610, thereby conveniently opening or closing the accommodation space between the lower housing 610 and the upper housing 620. In other embodiments, the handle 626 may be omitted.

[0085] The first protrusion 621 and the second protrusion 622 are protruding portions arranged on the lower housing 610. The first protrusion 621 and the second protrusion 622 each have an internal accommodation space. That is, the accommodation space within the wastewater tank 600 includes a first accommodation space within the lower housing 610, a second accommodation space within the first protrusion 621, and a third accommodation space within the second protrusion 622, with the second and third accommodation spaces both communicating with the first accommodation space. The wastewater tank 600 has an overall shape that is higher on both sides and lower in the middle, resembling a U-shape. The first protrusion 621 and the second protrusion 622 are separated by a through space, which extends along the front-back direction of the cleaning device. A surface of the first protrusion 621 facing the second protrusion 622 defines a first guide groove 6211 extending along the front-back direction of the cleaning device and communicating with the through space. A surface of the second protrusion 622 facing the first protrusion 621 defines a second guide groove 6221 extending along the front-back direction of the cleaning device and communicating with the through space. The surface of the first protrusion 621 facing the second protrusion 622 is parallel (or approximately parallel) to the surface of the second protrusion 622 facing the first protrusion 621. Referring to FIGS. 15-16, in some embodiments, the device main body 100 includes a protruding portion 110, which can be inserted into the through space between the first protrusion 621 and the second protrusion 622. The protruding portion 110 has a first side wall 111 and a second side wall 115 on its two sides. The first side wall 111 is arranged with a first guide protrusion 112 that matches the shape of the first guide groove 6211, and the second side wall 115 is arranged with a second guide protrusion 116 that matches the shape of the second guide groove 6221. The first guide protrusion 112 and the second guide protrusion 116 both extend along the front-back direction of the cleaning device. The first guide protrusion 112 and the second guide protrusion 116 are in sliding engagement with the first guide groove 6211 and the second guide groove 6221, respectively. In this way, the wastewater tank 600 can be inserted along a first direction (i.e., from a rear side of the device main body 100 toward a front side of the device main body 100) into the protruding portion 110 of the device main body 100, positioning the first guide protrusion 112 within the first guide groove 6211 and the second guide protrusion 116 within the second guide groove 6221.

[0086] In some embodiments, the protruding portion 110 further has a first limiting surface 113 and a second limiting surface 117 on a side facing the surface to be cleaned. The first limiting surface 113 is disposed above the first side wall 111 and adjacent to the first side wall 111, and the second limiting surface 117 is disposed above the second side wall 115 and adjacent to the second side wall 115.

[0087] Referring to FIG. 17, when the wastewater tank 600 is inserted into the protruding portion 110 on the device main body 100, the first limiting surface 113 abuts against an upper surface of the first protrusion 621, and an upper surface of the first guide protrusion 112 abuts against an inner wall surface on the upper side of the first guide groove 6211; the second limiting surface 117 abuts against an upper surface of the second protrusion 622, and an upper surface of the second guide protrusion 116 abuts against an inner wall surface on the upper side of the second guide groove 6221. In this way, the movement of the wastewater tank 600 in the up-down direction of the cleaning device is completely restricted. Referring to FIG. 18, when the wastewater tank 600 is inserted into the protruding portion 110 of the device main body 100, a surface of the first protrusion 621 facing the second protrusion 622 abuts against the first side wall 111, and a surface of the second protrusion 622 facing the first protrusion 621 abuts against the second side wall 115, thereby completely restricting the movement of the wastewater tank 600 in the up-down direction of the cleaning device. That is, the wastewater tank 600 can only be inserted into the device main body 100 along the first direction, and the wastewater tank 600 inserted into the device main body 100 can only move away from the device main body 100 along a second direction opposite to the first direction. In some embodiments, the protruding portion 110 may have an internal accommodation space, which may be configured to store clean water, i.e., the protruding portion 110 may be part of the clean water tank 800 disposed on the device main body 100. In this way, such a structural arrangement allows for efficient use of space on the cleaning device, resulting in a more compact device structure. In some embodiments, the first guide groove 6211 and the second guide groove 6221 are symmetrically arranged on the first protrusion 621 and the second protrusion 622, respectively. Correspondingly, the first guide protrusion 112 and the second guide protrusion 117 are symmetrically arranged on the first side wall 111 and the second side wall 115, respectively.

[0088] In some embodiments, the first limiting surface 113 and the second limiting surface 117 are also symmetrically arranged on both sides of the first side wall 111 and the second side wall 115. In some embodiments, the wastewater tank 600 may be configured such that when the wastewater tank 600 is inserted into the protruding portion 110 of the device main body 100, the upper surface of the first guide protrusion 112 abuts against the inner wall surface on the upper side of the first guide groove 6211, and the lower surface of the first guide protrusion 112 abuts against the inner wall surface on the lower side of the first guide groove 6211; the upper surface of the second guide protrusion 116 abuts against the upper side of the second guide groove 6221, and the lower surface of the second guide protrusion 116 abuts against the inner wall surface on the lower side of the second guide groove 6221, thereby completely restricting the movement of the wastewater tank 600 in the up-down direction of the cleaning device. It should be noted that the term abut as used herein may refer to a tight fit or an approximate fit (with a very small gap).

[0089] In some embodiments, a first guide protrusion 112 and a second guide protrusion 116, which are in communication with the through space, may be respectively arranged on the surface of the first protruding portion 621 facing the second protruding portion 622 and the surface of the second protruding portion 622 facing the first protruding portion 621, and a first guide groove 6211 and a second guide groove 6221 matching the first guide protrusions 112 and the second guide protrusions 116 may be respectively defined on the first side wall 111 and the second side wall 115. In some embodiments, the through space between the first protrusion 621 and the second protrusion 622 extends through the wastewater tank in the first direction and the second direction (i.e., the front-back direction of the cleaning device).

[0090] In other embodiments, the wastewater tank 600 may be omitted from the first guide groove 6211 and the second guide groove 6221, and the first guide protrusion 112 and the second protrusion may also be omitted on the protruding portion 110. Instead, the surface of the first protrusion 621 facing the second protrusion 622 and the surface of the second protrusion 622 facing the first protrusion 621 are configured to be inclined inward, i.e., in the direction from bottom to top, the distance between the surface of the first protrusion 621 facing the second protrusion 622 and the surface of the second protrusion 622 facing the first protrusion 621 gradually decreases, thereby defining a through space between the first protrusion 621 and the second protrusion 622 that has a cross-sectional shape approximately trapezoidal in the front-back direction. Correspondingly, the first side wall 111 and the second side wall 115 on the protruding portion 110 are also configured to be inclined inward, i.e., in the direction from bottom to top, the distance between the first side wall 111 and the second side wall 115 gradually decreases. The shape of the protruding portion 110 between the first side wall 111 and the second side wall 115 matches the shape of the through space with a cross-section approximately trapezoidal in shape, thereby allowing the wastewater tank 600 to be inserted along the first direction into the protruding portion 110 on the device main body 100. When the wastewater tank 600 is inserted into the protruding portion 110 on the device main body 100, the surface of the first protrusion 621 facing the second protrusion 622 contacts the first side wall 111, and the surface of the second protrusion 622 facing the first protrusion 621 contacts the second side wall 115, restricting the movement of the wastewater tank 600 in the left-right direction and downward relative to the cleaning device. The first limiting surface 113 abuts against the upper surface of the first protrusion 621, and the second limiting surface 117 abuts against the upper surface of the second protrusion 622, restricting the movement of the wastewater tank 600 upward relative to the cleaning device. In this way, the movement of the wastewater tank 600 in the up-down and left-right directions relative to the cleaning device is completely restricted. The wastewater tank 600 can only be inserted into the device main body 100 along the first direction, and the wastewater tank 600 inserted into the device main body 100 can only exit the device main body 100 along the second direction opposite to the first direction.

[0091] In some embodiments, the wastewater tank 600 is arranged with two latch assemblies, which are spaced apart and mutually independent. The two latch assemblies include a first latch 624 and a second latch 625. The device main body 100 defines a first latch slot 114 and a second latch slot 118 that match the first latch 624 and the second latch 625, respectively. The first latch 624 and the second latch 625 are both configured to switch between a locked position and an unlocked position. When the first latch 624 and/or the second latch 625 are in the locked position, the first latch 624 and/or the second latch 625 correspondingly engage with the first latch slot 114 and/or the second latch slot 118. When the first latch 624 and/or the second latch 625 are in the unlocked position, the first latch 624 and/or the second latch 625 are correspondingly separated from the first latch slot 114 and/or the second latch slot 118. When the wastewater tank 600 is inserted into the device main body 100 and the first latch 624 or the second latch 625 is in the locked position, the first latch 624 or the second latch 625 correspondingly engages with the first latch slot 114 or the second latch slot 118, preventing the wastewater tank 600, which is inserted into the device main body 100, from moving away from the device main body 100 in the second direction, thereby fully securing the wastewater tank 600 to the device main body 100. When the wastewater tank 600 is inserted into the device main body 100 and both the first latch 624 and the second latch 625 are in the unlocked position, the first latch 624 and the second latch 625 separate from the first latch slot 114 and the second latch slot 118, allowing the wastewater tank 600, which is inserted into the device main body 100, to move away from the device main body 100 in the second direction. That is, by switching the first latch 624 and the second latch 625 between the locked position and the unlocked position, the wastewater tank 600 can be conveniently connected to the device main body 100 or removed from the device main body 100. In some embodiments, the two latch assemblies are respectively disposed on the first protrusion 621 and the second protrusion 622, i.e., the first latch 624 and the second latch 625 are respectively disposed on the first protrusion 621 and the second protrusion 622. The structure and mating configuration of the first latch 624 and the first latch slot 114 are identical to those of the second latch 625 and the second latch slot 118. The following description will use the first latch 624 and the first latch slot 114 as an example for detailed explanation.

[0092] It should be noted that in other embodiments, the number of latch assemblies may be one, three, or more, i.e., the number of latches and latch slots may be one, three, or more. Those skilled in the art may configure these according to requirements. By providing two latches and two latch slots, the present disclosure enhances the stability of the connection between the wastewater tank 600 and the device main body 100. To some extent, it further increases redundancy. Even if the engagement between one latch and its corresponding latch slot fails (i.e., when one latch is in the locked position and the other latch is in the unlocked position), the other latch and its corresponding latch slot can effectively restrict the wastewater tank 600, which is inserted into the device main body 100, from moving away from the device main body 100 along the second direction. In other embodiments, the first protrusion 621 and the second protrusion 622 may each be arranged with two or more latch assemblies. In other embodiments, the latch assemblies may not be arranged on the first protrusion 621 and the second protrusion 622, such as being arranged on the lower housing 610 or other positions of the wastewater tank. Those skilled in the art may configure them as needed, provided that corresponding latch slots are defined on the device main body.

[0093] Referring to FIGS. 19-23, in some embodiments, the first latch 624 includes a latch body 6241, a button portion 6243, a latching portion 6242, and a guide portion 6244. The latch body 6241 includes a top wall and a side wall extending peripherally around the top wall. The top wall is fixedly arranged with the button portion 6243 and the latching portion 6242. The side wall is arranged with multiple guide portions 6244 protruding from the side wall. A side of each guide portion 6244 facing the top wall is spaced apart from the top wall. The first protrusion 621 defines a guide slot 6213 matching the shape of the guide portion 6244, which is configured to extend along the up-down direction of the device main body 100. The guide portion 6244 is inserted into the guide slot 6213, enabling the latch body 6241 to move only along the up-down direction within the first protrusion 621. A top of the first protrusion 621 defines a through hole matching the button portion 6243 and the latching portion 6242. The first latch 624 is movably arranged in the through hole, and the button portion 6243 and the latching portion 6242 can extend through the through hole to the exterior of the first protrusion 621, while the guide portion 6244 cannot extend through the through hole to the exterior of the first protrusion 621. The the first latch 624 further includes a support member 6245 and an elastic member 6246. The support member 6245 is detachably disposed within the device main body 100 and disposed below the latch body 6241. Specifically, the first protrusion 621 defines a screw slot 6214, and the support member 6245 defines a through hole matching the screw slot 6214. A screw 6247 passes through the through hole and engages with the screw slot 6214 to detachably connect the support member 6245 to the first protrusion 621. The elastic member 6246 is disposed between the support member 6245 and the latch body 6241, and is configured to push the first latch 624 upward through its own elastic force until the upper side of the guide portion 6244 abuts against the top of the first protrusion 621, thereby positioning the first latch 624 in the locked position. When the first latch 624 is in the locked position, the button portion 6243 and the latching portion 6242 extend outward beyond the first protrusion 621. When the button portion 6243 is pressed, the elastic member 6246 is compressed (or to say, deformed), allowing the first latch 624 to switch from the locked position to the unlocked position. When the first latch 624 is in the unlocked position, the button portion 6243 and the latching portion 6242 are retracted into the first protrusion 621 and do not protrude from the upper surface of the first protrusion 621. When the button portion 6243 is no longer pressed, the elastic member 6246 can push the first latch 624 to return from the unlocked position to the locked position. In some embodiments, the elastic member 6246 may be a spring. The latch body 6241 is arranged with a first limiting column on a side facing the support member 6245, and the support member 6245 is arranged with a second limiting column coaxial with the first limiting column on a side facing the latch body 6241. The spring 6246 is sleeved on the first limiting column and the second limiting column, and two ends of the spring 6246 abut against the support member 6245 and the latch body 6241, respectively. When the first latch 624 is in the locked position, the compression of the spring 6246 is less than when the first latch 624 is in the unlocked position. The first limiting column and the second limiting column are configured to abut against each other when the first latch 624 is in the unlocked position, thereby restricting further pressing of the first latch 624.

[0094] In other embodiments, the elastic member 6246 may be a metal spring plate or other suitable elastic members disposed between the support member 6245 and the latch body 6241. In some embodiments, the latching portion 6242 includes a limiting surface and a guiding surface, where the limiting surface is perpendicular to the upper surface of the first protrusion 621 and faces the second direction, and the limiting surface is inclined relative to the upper surface of the first protrusion 621 and faces the first direction. When the wastewater tank 600 is inserted into the device main body 100, as the latching portion 6242 enters the first latch slot 114, the guiding surface can first abut against the device main body 100 to push the first latch 624 downward, compressing the elastic member 6246, thereby allowing the first latch 624 to switch from the locked position to the unlocked position. When the locking portion 6242 of the first latch 624 in the unlocked position moves to the first latch slot 114, the guiding surface separates from the device main body 100, and the elastic member 6246 pushes the first latch 624 to switch from the unlocked position to the locked position. The configuration of the guiding surface allows the user to insert the wastewater tank 600 into the device main body 100 without manually pressing the button portion 6243 to keep it in the unlocked position.

[0095] Referring to FIG. 22, when the wastewater tank 600 is inserted into the device main body 100 and the first latch 624 is in the locked position, the button portion 6243 and the latching portion 6242 extend outside the first protrusion 621. The latching portion 6242 is disposed inside the first latch slot 114, and a side (i.e., the limiting surface of the latching portion 6242) of the latching portion 6242 facing the second direction (i.e., a direction toward the rear side of the cleaning device or the left side in FIG. 22) abuts against a wall surface of the latch slot facing the first direction (i.e., a direction toward the front side of the cleaning device or the right side in FIG. 22), thereby restricting the wastewater tank 600 from moving away from the device main body 100 along the second direction.

[0096] Referring to FIG. 23, when the wastewater tank 600 is inserted into the device main body 100 and the button portion 6243 is pressed to place the first latch 624 in the unlocked position, the button portion 6243 and the latching portion 6242 are retracted into the first protrusion 621, and the latching portion 6242 received within the first protrusion 621 does not protrude from the upper surface of the first protrusion 621, thereby separating the latching portion 6242 from the first latch slot 114 and no longer restricting the movement of the wastewater tank 600 in the second direction (i.e., the leftward direction in FIG. 24). The wastewater tank 600 can move along the second direction and separate from the device main body 100.

[0097] In some embodiments, the wastewater tank 600 inserted into the device main body 100 is disposed on the rear end of the device main body 100, and the direction in which the wastewater tank 600 is mounted on the device main body 100 is parallel to the forward direction of the cleaning device. The direction from the unlocked position to the locked position is perpendicular to the forward direction of the cleaning device 100 and perpendicular to the surface to be cleaned.

[0098] In some embodiments, the first latch 624 and the second latch 625 are provided in the first protrusion 621 and the second protrusion 622, thereby fully utilizing the partial unused space at the upper part of the wastewater tank 600, avoiding the occupation of the internal space of the lower housing 610, and increasing the effective volume of the wastewater tank 600. Furthermore, the distance (span) between the first latch 624 and the second latch 625, which are respectively positioned on the first protrusion 621 and the second protrusion 622, is greater than the distance (span) between the first guide groove 6211 and the second guide groove 6221. This enables more stable and reliable positioning of the wastewater tank 600, preventing it from shaking. When mounting the wastewater tank 600 onto the device main body 100, the user simply needs to insert the wastewater tank 600 along the first direction into the device main body 100, ensuring that the first latch 624 and the second latch 625 respectively engage with the first latch slot 114 and the second latch slot 118. When removing the wastewater tank 600 mounted on the device main body 100 from the device main body 100, the user simply needs to press the button portion 6243 to disengage the first latch 624 and the second latch 625 from the first latch slot 114 and the second latch slot 118 respectively, and then move the wastewater tank 600 along the second direction, featuring a simple and convenient operation.

[0099] In other embodiments, other water tanks such as a clean water tank or a detergent tank may be arranged and formed into shapes identical or similar to the wastewater tank 600 and connected to the device main body 100 in the same manner as the wastewater tank 600 and the device main body 100. In this case, the roller assembly 400 on the cleaning device may be replaced with other cleaning assemblies capable of cleaning the surface to be cleaned, such as a rotatable cleaning cloth assembly, a linear cleaning cloth assembly, etc.

[0100] Referring to FIG. 24, in some embodiments, the suction and drainage assembly 700 includes a wastewater suction assembly and a wastewater drainage assembly. The wastewater suction assembly is connected to the wastewater tank 600, which is arranged with a wastewater inlet 611 communicating with the accommodation space inside the wastewater tank 600. The wastewater suction assembly is configured to draw out the gas from the wastewater tank 600, creating a negative pressure inside the wastewater tank 600 (i.e., the accommodation space within the wastewater tank 600 to contain wastewater), thereby drawing the wastewater collected by the wastewater collection assembly 500 through the wastewater inlet 611 into the accommodation space within the wastewater tank 600. The drainage assembly is connected to the wastewater tank 600, and the wastewater tank 600 is arranged with a drain outlet 618 communicating with the accommodation space within the wastewater tank 600. The drain outlet 618 is configured to pump gas from outside the wastewater tank 600 into the wastewater tank 600, creating positive pressure within the wastewater tank 600, thereby allowing wastewater within the accommodation space of the wastewater tank 600 to be discharged from the wastewater tank 600 through the drain outlet 618.

[0101] Specifically, the wastewater suction assembly includes a wastewater suction pump 710, a gas inlet pipe 711 connected to a gas inlet of the wastewater suction pump 710, and a gas outlet pipe 712 connected to a gas outlet of the wastewater suction pump 710. The drainage assembly includes a wastewater drainage pump 720 arranged with a gas inlet 721, and a gas outlet pipe connected to a gas outlet of the wastewater drainage pump 720. The gas inlet pipe 711 and the gas outlet pipe of the wastewater drainage pump 720 are connected to a first end of a collector pipe 740 via a three-way connector 730, and a second end of the collector pipe 740 is connected to a first end of a mating port 750 arranged on the device main body 100. A second end of the mating port 750 is connected to a connection port 6212 on the wastewater tank 600, and the connection port 6212 is in communication with the accommodation space inside the wastewater tank 600 for containing wastewater. In some embodiments, the wastewater suction pump 710 and the wastewater drainage pump 720 may be diaphragm pumps or other suitable gas pumps. As the wastewater suction pump 710 and the wastewater drainage pump 720 are connected via the three-way connector 730, when the wastewater suction pump 710 is operating, some gas may flow through the gas inlet 721, the wastewater drainage pump 720, the gas outlet pipe of the wastewater drainage pump 720, and the three-way connector 730, and into the inlet pipe 711, which to some extent reduces the ability of the wastewater suction pump 710 to create a vacuum inside the wastewater tank 600. Similarly, when the wastewater drainage pump 720 is operating, some gas may flow through the gas outlet pipe of the wastewater drainage pump 720, the three-way connector 730, the gas inlet pipe 711, the wastewater suction pump 710, and the gas outlet pipe 712, and be discharged, which to some extent weakens the ability of the wastewater drainage pump 720 to generate positive pressure inside the wastewater tank 600.

[0102] In some embodiments, the wastewater suction assembly further includes a first check valve 713 disposed on the gas outlet of the wastewater suction pump 710. The first check valve 713 is configured to allow gas to pass through the gas outlet of the wastewater suction pump 710 and be discharged outside, while restricting external gas from entering through the gas outlet. Specifically, the first check valve 713 is disposed on an end of the gas outlet pipe 712 away from the wastewater suction pump 710. The first check valve 713 may be a duckbill valve or other suitable check valves, which only allows gas from the gas outlet pipe 712 to pass through the first check valve 713 in one direction and be discharged into the ambient air (i.e., the first check valve 713 allows gas to be discharged outward through the first check valve 713 from the gas outlet pipe 712, while restricting external gas from entering the gas outlet pipe 712 through the first check valve 713). The first check valve 713 can further create a certain resistance to the gas discharged through it. In this way, when the wastewater drainage pump 720 is operating, the first check valve 713 can partially obstruct gas from being discharged through it, thereby enhancing the ability of the wastewater drainage pump 720 to generate positive pressure within the wastewater tank 600. In some embodiments, the gas outlet of the wastewater suction pump 710 may not be arranged with the gas outlet pipe 712, and the first check valve 713 is directly connected to the gas outlet of the wastewater suction pump 710.

[0103] In some embodiments, the wastewater drainage assembly further includes a second check valve 724 disposed on the gas outlet pipe of the wastewater drainage pump 720. The second check valve 724 is configured to allow gas to flow from the wastewater drainage pump 720 through the second check valve 724 into the accommodation space within the wastewater tank 600, while restricting gas from flowing through the second check valve 724 toward the wastewater drainage pump 720. The second check valve 724 may be a duckbill valve or other suitable check valves. The gas outlet pipe of the wastewater drainage pump 720 includes a first gas outlet pipe 722 and a second gas outlet pipe 723. The second check valve 724 is disposed between the first gas outlet pipe 722 and the second gas outlet pipe 723, and it only allows gas from the first gas outlet pipe 722 to flow in one direction through the second check valve 724 into the second gas outlet pipe 723. (i.e., the second check valve 724 allows gas to flow from the wastewater drainage pump 720 to the three-way fitting 730 and into the accommodation space within the wastewater tank 600, while restricting gas from flowing from the three-way fitting 730 back to the wastewater drainage pump 720). The second check valve 724 can further create a certain resistance to the gas entering the second gas outlet pipe 723. In this way, when the wastewater suction pump 710 is operating, the second check valve 724 can partially obstruct the gas from passing through the second check valve 724 into the second gas outlet pipe 723 (i.e., obstructing the gas from the wastewater drainage pump 720 from entering the wastewater suction pump 710), thereby enhancing the ability of the wastewater suction pump 710 to generate negative pressure within the wastewater tank 600. In some embodiments, the wastewater suction pump 710 and the wastewater drainage pump 720 are configured to operate at different times to avoid mutual interference. In some embodiments, the three-way connector 730 may be replaced with a three-way control valve, which can be controlled to connect the collector pipe 740 to the gas outlet pipe of the wastewater drainage pump 720 (and not to the gas inlet pipe 711) or controlled to connect the collector pipe 740 to the gas inlet pipe 711 (and not to the gas outlet pipe of the wastewater drainage pump 720). That is, the three-way control valve can connect the gas inlet pipe 711 to the connection port 6212, or connect the gas outlet pipe of the wastewater drainage pump 720 to the connection port 6212. In this case, the first check valve 713 and the second check valve 724 are not required on the gas inlet pipe 711 and the gas outlet pipe of the wastewater drainage pump 720. In some embodiments, the wastewater tank 600 may be arranged with two connection ports 6212 that are in communication with the accommodation space within the wastewater tank 600 for containing wastewater. The gas inlet pipe 711 and the gas outlet pipe of the wastewater drainage pump 720 may be respectively connected to these two connection ports 6212. In this case, the three-way connector 730 and the collector pipe 740 are not required. In this case, the first check valve 713 and the second check valve 724 may be respectively provided on the gas inlet pipe 711 and the gas outlet pipe of the wastewater drainage pump 720, thereby enhancing the ability of the wastewater suction pump 710 and the wastewater drainage pump 720 to generate positive and negative pressure within the wastewater tank 600.

[0104] Referring to FIGS. 25-38, in some embodiments, the wastewater tank 600 includes a gas inlet/outlet passage, a wastewater suction passage, and a wastewater drainage passage.

[0105] Specifically, the connection port 6212 is in communication with the accommodation space within the wastewater tank 600 for containing wastewater via the gas inlet/outlet passage. The gas inlet/outlet passage includes a ventilation connection port 6215, a first ventilation plug-in port 616, a containment chamber 615, a filter assembly 631, a second ventilation plug-in port 617, a vent pipe 632, a vent bracket 633, and a water inlet check valve assembly 634. Specifically, the ventilation connection port 6215 is disposed on the first protrusion 621 and is in communication with the connection port 6212; the first ventilation plug-in port 616, the containment chamber 615, the filter assembly 631, the second ventilation plug-in port 617, the vent pipe 632, and the vent bracket 633 are disposed on the lower housing 610, with the first ventilation plug-in port 616 inserted into the ventilation connection port 6215. The containment chamber 615 is an open cavity facing the wastewater collection trough 510. The filter assembly 631 can be inserted into the containment chamber 615 along a direction from the front side of the cleaning device to the rear side of the cleaning device. When the wastewater collection trough 510 is magnetically connected to the wastewater tank 600, it completely confines the filter assembly 631 within the containment chamber 615.

[0106] Referring to FIGS. 30-31, the filter assembly 631 includes a box with a first ventilation hole 6311 and a second ventilation hole 6312, and a first sponge filter core 6313 disposed within the box. The containment chamber 615 is in communication with the first ventilation plug-in port 616 and the second ventilation plug-in port 617. When the filter assembly 631 is inserted into the containment chamber 615, the first ventilation hole 6311 abuts against the first ventilation plug-in port 616 to form a communication, and the second ventilation hole 6312 abuts against the second ventilation plug-in port 617 to form a communication. A first end of the vent pipe 632 is inserted into the second ventilation plug-in port 617, and a second end of the vent pipe 632 is inserted into a first end of the vent bracket 633, which has a gas flow passage internally.

[0107] An upper side of the second protrusion 622 defines a mounting slot matching the water inlet check valve assembly 634, and the water inlet check valve assembly 634 can be inserted into the mounting slot in a downward direction. Referring to FIGS. 32-35, the water inlet check valve assembly 634 includes a first lower cover 6341 and a first upper cover 6342, with the first upper cover 6342 connected to the first lower cover 6341 (e.g., via a snap-fit connection). The first lower cover 6341 has a first chamber, and the first upper cover 6342 has a second chamber, where the first chamber and the second chamber are not communicated with each other. On a lower side wall of the first lower cover 6341 (i.e., the side wall facing the lower housing 610) at the first chamber, a cylindrical vent port 6343 and a perforated vent opening 6344 are arranged. The vent port 6343 and the vent opening 6344 are in communication with each other through the space inside the second chamber. The first chamber is arranged with a filter mesh 6346 covering the vent opening 6344 and a second sponge filter core 6345. On a lower side wall of the first lower cover 6341 at the second chamber (i.e., the side wall facing the lower housing 610), a water inlet port 6347 and a water outlet port 6349 are arranged. The water outlet port 6349 is arranged with a water inlet check valve 6348, and the water inlet port 6347 and the water outlet port 6349 are in communication with each other through the space inside the first chamber. The second end of the vent pipe 632 is inserted into the vent port 6343, and the vent opening 6344 is in communication with the accommodation space within the wastewater tank 600 for containing wastewater. In this way, when the wastewater suction pump 710 operates, the gas within the accommodation space for containing wastewater in the wastewater tank 600 passes sequentially through the vent opening 6344, the filter mesh 6346, the second sponge filter core 6345, the vent port 6343, the vent bracket 633, the second ventilation plug-in port 617, the second ventilation hole 6312, the first sponge filter core 6313, the first ventilation hole 6311, the first ventilation plug-in port 616, the ventilation connection port 6215, and the connection port 6212, and then exits the wastewater tank 600.

[0108] In the embodiments, the first sponge filter core 6313, the second sponge filter core 6345, and the filter mesh 6346 may effectively filter wastewater, thereby preventing large particles and fibrous materials in the wastewater from entering the wastewater suction pump 710 and damaging the same. The first sponge filter core 6313 and the second sponge filter core 6345 may be honeycomb-shaped foam or other suitable components with filtering capabilities. Those skilled in the art can configure them as needed. When the wastewater drainage pump 720 is operating, the gas flows in the opposite direction to that when the wastewater suction pump 710 is operating, entering the wastewater tank 600 from the outside to the accommodation space for containing wastewater, which will not be repeated herein. It should be noted that in some embodiments, all connections between components in the gas inlet/outlet passage are sealed connections. In some embodiments, one of the first sponge filter core 6313 and the second sponge filter core 6345 may be omitted.

[0109] In some embodiments, the wastewater suction passage is configured to connect the wastewater inlet 611 and the accommodation space within the wastewater tank 600 for containing wastewater, such that when a negative pressure is generated within the wastewater tank 600, the wastewater within the wastewater collection trough 510 can enter the accommodation space within the wastewater tank 600 through the wastewater inlet 611 and the wastewater suction passage. Specifically, the wastewater suction passage includes a connection member 641, a water inlet pipe 642, a plug-in port 6222, and the water inlet check valve assembly 634. The connection member 641 has a flow passage inside. A first end of the connection member 641 is connected to the wastewater inlet 611, and a second end of the connection member 641 is inserted into a first end of the water inlet pipe 642. The water inlet pipe 642 and the wastewater inlet 611 are in communication with each other through the connection member 641. A second end of the water inlet pipe 642 is inserted into a first end of the plug-in port 6222. The plug-in port 6222 is disposed on the second protrusion 622. When the water inlet check valve assembly 634 is inserted into the corresponding mounting slot on the second protrusion 622, the water inlet port 6347 on the water inlet check valve assembly 634 is inserted into a second end of the plug-in port 6222. The water inlet port 6347 and the water outlet port 6349 are in communication with each other through the space within the first chamber of the water inlet check valve assembly 6348, and the water outlet port 6349 is in communication with the accommodation space within the wastewater tank 600 for containing wastewater. The water inlet check valve 6348 allows fluid from the water inlet port 6347 to flow unidirectionally through the water inlet check valve 6348 into the accommodation space within the wastewater tank 600 (i.e., the water inlet check valve assembly 634 allows fluid from the wastewater inlet 611 (i.e., from the wastewater collection trough 510) to flow through the water inlet check valve assembly 634 into the accommodation space within the wastewater tank 600 for containing wastewater, while restricting fluid flow in the opposite direction). The water inlet check valve 6348 may be a duckbill valve or other suitable check valves. The duckbill valve may be made of a flexible material such as rubber, and includes a duckbill valve inlet and a duckbill valve outlet, allowing fluid (liquid or gas) to flow only from the duckbill valve inlet to the duckbill valve outlet. When fluid tends to flow in the opposite direction, the pressure of the fluid causes the duckbill valve opening(s) to close, thereby blocking the reverse flow of the fluid. In this way, when the wastewater suction pump 710 is operating and the pressure inside the wastewater tank 600 is negative (i.e., the pressure in the accommodation space within the wastewater tank 600 for containing wastewater is lower than the external environmental pressure), the wastewater in the wastewater collection trough 510 can flow into the wastewater tank 600 under the influence of external environmental pressure, passing sequentially through the wastewater inlet 611, the connection member 641, the water inlet pipe 642, the plug-in port 6222, the water inlet port 6347, and the water inlet check valve 6348 into the accommodation space within the wastewater tank 600 for containing wastewater. It should be noted that in some embodiments, all connections between components in the wastewater suction passage are sealed connections. In some embodiments, the water inlet check valve assembly 634 is configured to simultaneously achieve gas inlet/outlet (and filtration) and one-way water inlet functions. In other embodiments, a portion of the water inlet check valve assembly 634 that achieves gas inlet/outlet (and filtration) and one-way water inlet may be split into two independent components, with each component separately performing the functions of gas inlet/outlet (and filtration) and one-way water inlet.

[0110] In some embodiments, the wastewater drainage passage is configured to connect the accommodation space within the wastewater tank 600 for containing wastewater and the drain outlet 618, such that when positive pressure is generated in the wastewater tank 600, the wastewater contained in the wastewater tank 600 can flow through the wastewater drainage passage to the drain outlet 618 and be discharged from the wastewater tank 600 through the drain outlet 618. Specifically, the wastewater drainage passage includes a connection member 651, a water outlet pipe 652, a plug-in port 6216, a first drainage plug-in port 6217, a water outlet check valve assembly 653, and a second drainage plug-in port 6181. The connection member 651 has an internal flow passage, with its first end having an opening disposed at the bottom of the accommodation space within the wastewater tank 600 for containing wastewater, and its second end being inserted into a first end of the water outlet pipe 652. A second end of the water outlet pipe 652 is inserted into a first end of the plug-in port 6216, and the plug-in port 6216 is disposed on the first protrusion 621. An upper side of the first protrusion 621 defines a mounting slot matching the water outlet check valve assembly 653, and the water outlet check valve assembly 653 can be inserted into the mounting slot in a downward direction. Referring to FIGS. 36-38, the water outlet check valve assembly 653 includes a second lower cover 6531 and a second upper cover 6532. The second upper cover 6532 is detachably connected to the second lower cover 6531 (e.g., via a snap-fit connection), and a chamber is arranged between the second lower cover 6531 and the second upper cover 6532. A lower side of the second lower cover 6531 (i.e., a side facing the lower housing 610) is arranged with a first water outlet port 6533 and a second water outlet port 6535. The second water outlet port 6535 is arranged with a water outlet check valve 6534. The first water outlet port 6533 and the second water outlet port 6535 are in communication with each other through the chamber. When the water outlet check valve assembly 653 is inserted into the mounting slot, the first water outlet port 6533 is inserted into a second end of the plug-in port 6216. The first protrusion 621 is further arranged with a first drainage plug-in port 6217. When the water outlet check valve assembly 653 is inserted into the mounting slot, the second water outlet port 6535 abuts against a first end of the first drainage plug-in port 6217 to form a communication. The water outlet check valve 6534 only allows fluid from the first water outlet port 6533 to flow through the water outlet check valve 6534 toward the first drainage plug-in port 6217 (i.e., the water outlet check valve assembly 653 allows fluid from the wastewater tank 600 to flow through the water outlet check valve assembly 653 toward the drain outlet 618, while restricting fluid from flowing in the opposite direction). The outlet check valve 6534 may be a duckbill valve or other suitable check valves. When the first protrusion 621 is connected to the lower housing 610, the first drainage plug-in port 6217 is inserted into the second drainage plug-in port 6181 on the lower housing 610, and the second drainage plug-in port 6181 is in communication with the drain outlet 618. In this way, when the wastewater drainage pump 720 is operating and the pressure inside the wastewater tank 600 is positive (i.e., the pressure in the accommodation space within the wastewater tank 600 for containing wastewater is greater than the external environmental pressure), the wastewater in the wastewater collection trough 510 can flow under this pressure, and the wastewater inside the wastewater tank 600 is discharged sequentially through the connection member 651, the gas water outlet pipe 652, the plug-in port 6216, the first drainage plug-in port 6217, the first water outlet port 6533, the water outlet check valve 6534, the first drainage plug-in port 6217, the second drainage plug-in port 6181, and the drain outlet 618, and be discharged out of the wastewater tank 600. It should be noted that in some embodiments, all connections between components in the wastewater drainage passage are sealed connections. Referring to FIG. 39, in some embodiments, the water outlet check valve assembly 653 further includes a diaphragm valve 6536, which is disposed in the chamber between the second lower cover 6531 and the second upper cover 6532 and covers an upper end of the first outlet port 6533. The diaphragm valve 6536 may be a flexible component made of rubber and includes a diaphragm valve opening, which is normally closed. When water pressure is applied, the diaphragm valve opening opens while providing some resistance to the water flow. In this way, during the siphoning effect, as long as the pressure inside the wastewater tank 600 is not positive, the wastewater inside the wastewater tank 600 cannot overcome the resistance of the diaphragm valve 6536 and continue to flow outward, thereby effectively preventing wastewater from continuously flowing out of the wastewater tank 600 due to the siphoning effect.

[0111] The cleaning device of the present disclosure may achieve wastewater suction by creating a negative pressure inside the wastewater tank 600 and wastewater discharge by creating a positive pressure inside the wastewater tank 600. This design prevents the wastewater suction pump 710 and the wastewater drainage pump 720 from coming into direct contact with wastewater, thereby reducing the risk of blockages or damage caused by hair, particles, and other contaminants in the wastewater, thereby significantly extending the service life of the pumps. Additionally, by generating positive pressure within the wastewater tank 600 via the wastewater drainage pump 720, wastewater can be automatically discharged, which allows the cleaning device to actively discharge wastewater when it reaches a designated position (e.g., when it reaches the base station or drain), thereby expanding the application scenarios of the cleaning device, eliminating the need for manual wastewater cleanup by users, reducing user operations, and eliminating the need for specific wastewater discharge structures on the base station, and thus effectively lowering costs of the base station.

[0112] In the embodiments, when the wastewater suction pump 710 is operating, the water inlet check valve 6348 opens, and the outlet check valve 6534 closes; when the wastewater drainage pump 720 is operating, the water inlet check valve 6348 closes, and the outlet check valve 6534 opens. In this way, when either the wastewater suction pump 710 or the wastewater drainage pump 720 is operating, the wastewater tank 600 maintains good sealing performance, enhancing the operational efficiency of both the wastewater suction pump 710 and the wastewater drainage pump 720.

[0113] In the embodiments, the water inlet check valve assembly 634, the water outlet check valve assembly 653, and the filter assembly 631 are all detachably arranged on the wastewater tank 600. These components may become damaged or malfunction after prolonged use due to contact with wastewater. Users can easily remove these components for cleaning or replacement. In some embodiments, the water inlet check valve assembly 634 and the water outlet check valve assembly 653 are respectively inserted into the mounting slots on the second protrusion 622 and the first protrusion 621. When the wastewater tank 600 is inserted into the device main body 100, the first limiting surface 113 and the second limiting surface 117 on the first side wall 111 and the second side wall 115 respectively cover the mounting slots corresponding to the water outlet check valve assembly 653 and the water inlet check valve assembly 634, thereby fully restricting the water inlet check valve assembly 634 and the water outlet check valve assembly 653 within the mounting slots. In this way, during operation of the cleaning device, these components will not loosen or detach.

[0114] Referring to FIGS. 25-28, in some embodiments, the cleaning device further includes a water level detection float 660 and a water level detection sensor. The water level detection float 660 is disposed inside the wastewater tank 600 and can float on the surface of the wastewater, rising and falling in sync with the wastewater level (i.e., floating up and down in sync). When the wastewater in the wastewater tank 600 reaches a set capacity, the water level detection float 660 can rise to a predetermined height. The water level detection sensor is arranged inside the wastewater tank 600 or within the device main body 100, and is configured to detect whether the water level detection float 660 has risen to the predetermined height. In some embodiments, the water level detection float 660 includes a water level sensing magnet 612, and the water level detection sensor is a Hall sensor. When the water level detection float 660 rises to the predetermined height, the water level sensing magnet 612 triggers the Hall sensor to output a sensing signal. When the water level detection float 660 has not risen to the predetermined height, the Hall sensor is not triggered and does not output the sensing signal. The cleaning device further includes a controller, which may be connected to the water level detection sensor and the wastewater suction pump 710 to control the wastewater suction pump 710 to stop operating when it receives the sensing signal output from the water level detection sensor. In some embodiments, the vent bracket 633 has an extension segment extending in the up-down direction, and the water level detection float 660 is arranged on the extension segment of the vent bracket 633 extending in the up-down direction, thereby restricting the water level detection float 660 to move only vertically within the wastewater tank 600 in response to changes in the wastewater level, thereby better triggering the water level detection sensor.

[0115] In some embodiments, a connecting pipe (not shown) is further arranged inside the wastewater tank 600. The connecting pipe may be a U-shaped pipe or other suitable shaped pipe fitting, disposed inside the interior of the wastewater tank 600, where an end of the connecting pipe is disposed within the second accommodation space (near the top of the second accommodation space) inside the first protrusion 621, and the other end of the connecting pipe is disposed within the third accommodation space (near the top of the third accommodation space) inside the first protrusion 621. The gas within the second accommodation space and the third accommodation space can flow through the connecting pipe, thereby maintaining balanced air pressure within the first protrusion 621 and the second protrusion 622.

[0116] Referring to FIG. 24, in some embodiments, the clean water tank 800 is fixedly arranged within the device main body 100, disposed on the rear side of the device main body 100, and the protruding portion 110 that is in plug-in engagement with the wastewater tank 600 may be on the outer wall surface of the clean water tank 800. This design makes the cleaning device structure compact and helps reduce the volume of the cleaning device. In some embodiments, the clean water tank 800 may be detachably arranged on the device main body 100 via screws or clips.

[0117] In some embodiments, the clean water pump assembly 900 includes a clean water pump 910, a water inlet pipe 920, and a water outlet pipe 930. The clean water pump 910 is connected to the clean water tank 800 via the water inlet pipe 920, and the clean water pump 910 is connected to the clean water inlet 421 on the roller bracket 420 via the water outlet pipe 930. In this way, the clean water pump 910 can pump clean water from the clean water tank 800 into the cavity within the roller bracket 420, and then spray it uniformly onto the cleaning cloth on the roller 410 through the clean water outlet 422 on the roller bracket 420 to moisten the cleaning cloth.

[0118] For the cleaning device according to the present disclosure, during operation, the drive motor drives the travel wheels 210 to rotate, thereby moving the cleaning device along the surface to be cleaned. The roller motor drives the roller 410, which is in the lowered position, to rotate around its central axis. The cleaning cloth on the roller 410 forms a flat contact with the surface to be cleaned, absorbing liquid dirt from the surface and removing it through friction with the surface.

[0119] The clean water pump 910 can draw clean water from the clean water tank 800 and send it to the cavity within the roller bracket 420, where the clean water is uniformly sprayed onto the cleaning cloth on the roller 410 through the clean water outlet 422 on the roller bracket 420, thereby wetting the cleaning cloth.

[0120] During the rotation of the roller 410, the water scrapper 511 abuts against the cleaning cloth on the roller 410 to scrape out the wastewater and other contaminants from the cleaning cloth. The scraped-out wastewater flows into the wastewater collection trough 510, where the filter mesh 530 in the wastewater collection trough 510 filters out impurities such as hair and particles, retaining them on the filter mesh 530. The attachment portion 512 remains in contact with the cleaning cloth, allowing any water that leaks or overflows from below the water scrapper 511 to be reabsorbed into the cleaning cloth (carried away by the cleaning cloth), thereby preventing wastewater from leaking from below the water scrapper 511 onto the surface to be cleaned.

[0121] The wastewater suction pump 710 is controlled to operate to extract gas from the wastewater tank 600, creating a negative pressure inside the wastewater tank 600. Wastewater from the wastewater collection trough 510 enters the wastewater tank 600 through the wastewater inlet 611 and the wastewater suction passage for storage. The negative pressure generated by the wastewater suction pump 710 in the wastewater tank 600 enables wastewater from the wastewater collection trough 510 to be promptly sucked into the wastewater tank 600 for storage, ensuring that wastewater does not overflow from the wastewater collection trough 510 onto the surface to be cleaned, thereby preventing wastewater from re-contaminating the surface. Additionally, users do not need to frequently clean or replace the cleaning cloth, effectively enhancing user experience and cleaning efficiency.

[0122] When the wastewater in the wastewater tank 600 reaches the set capacity, the control system stops the wastewater suction pump 710 and the clean water pump 910, directs the cleaning device to move to the base station or other designated location, and controls the wastewater drainage pump 720 to pump external gas into the wastewater tank 600, creating positive pressure within the wastewater tank 600, which causes the wastewater in the wastewater tank 600 to be discharged through the drain outlet 618 to the base station or other suitable location outside the wastewater tank 600. After the wastewater is discharged, the cleaning device may be controlled to continue the aforementioned process to clean the surfaces to be cleaned.

[0123] The cleaning device of the present disclosure, by generating negative pressure within the wastewater tank 600 to draw in wastewater and generating positive pressure within the wastewater tank 600 to expel wastewater, avoids direct contact between the wastewater suction pump 710 and the wastewater drainage pump 720 and the wastewater, thereby reducing the risk of blockages or damage to the pumps caused by hair, particles, and other impurities in the wastewater, thereby significantly extending the service life of the pumps.

[0124] Although the present disclosure has been described with reference to the accompanying drawings to illustrate exemplary embodiments, it can be understood that the above exemplary embodiments are merely illustrative and are not intended to limit the scope of the present disclosure. Those skilled in the art may make various changes and modifications therein without departing from the scope and spirit of the present disclosure. All such changes and modifications are intended to be included within the scope of the present disclosure as claimed in the appended claims.

[0125] The specification provided herein describes many specific details. However, it can be understood that the embodiments of the present disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been described in detail to avoid obscuring the present specification.

[0126] Similarly, it can be understood that, for the sake of brevity and to aid in understanding one or more aspects of the present disclosure, in the description of the exemplary embodiments of the present disclosure, various features of the present disclosure are sometimes grouped together in a single embodiment, drawing, or description thereof. However, the implementations of the present disclosure should not be interpreted that the present disclosure claims protection for more features than those explicitly stated in each claim. More precisely, as reflected in the corresponding claims, the inventive point lies in the ability to solve the corresponding technical problem using fewer features than all the features disclosed in a single exemplary embodiment. Therefore, the claims that follow the specific embodiments are hereby expressly incorporated into the specific embodiments, with each claim itself serving as a separate embodiment of the present disclosure.

[0127] Those skilled in the art will understand that, except for mutually exclusive features, any combination of all features disclosed in this specification (including the accompanying claims, abstract, and drawings) and any processes or units of any method or device so disclosed may be used. Unless otherwise explicitly stated, each feature disclosed in this specification (including the accompanying claims, abstract, and drawings) may be replaced by an alternative feature that provides the same, equivalent, or similar purpose.

[0128] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments and not other features, the combination of features of different embodiments means that they are within the scope of the present disclosure and form different embodiments. For example, in the claims, any one of the embodiments claimed can be used in any combination.

[0129] It should be noted that the above embodiments are provided to illustrate the present disclosure and not to limit it, and those skilled in the art may design alternative embodiments without departing from the scope of the appended claims.