DISHWASHER

Abstract

A dishwasher includes a tub that defines a washing chamber, a door configured to open and close the washing chamber, a handle disposed at the door, a handle motor configured to drive the handle in a front-rear direction, a first sensor having a first detection distance, and a second sensor having a second detection distance different from the first detection distance. The handle is configured to, based on the first sensor detecting a user, protrude outward in a forward direction from a first position to a second position. The handle is configured to, based on the second sensor detecting the user, move in the forward direction from the second position to a third position.

Claims

1. A dishwasher comprising: a tub that defines a washing chamber; a door configured to open and close the washing chamber; a handle disposed at the door; a handle motor configured to drive the handle in a front-rear direction; a first sensor having a first detection distance; and a second sensor having a second detection distance different from the first detection distance of the first sensor, wherein the handle is configured to: based on the first sensor detecting a user, protrude outward from the door in a forward direction from a first position to a second position, and based on the second sensor detecting the user, move in the forward direction from the second position to a third position.

2. The dishwasher of claim 1, wherein the first detection distance of the first sensor is longer than the second detection distance of the second sensor.

3. The dishwasher of claim 1, wherein the second sensor is disposed above the first sensor.

4. The dishwasher of claim 1, wherein the first sensor is disposed at the door, and the second sensor is disposed above the first sensor.

5. The dishwasher of claim 1, wherein the door comprises a door cover that defines a front surface of the door, wherein the first sensor is one of a plurality of first sensors that are disposed at a bottom surface of the door cover and spaced apart from one another, and wherein the second sensor is disposed inside the handle.

6. The dishwasher of claim 1, wherein a distance between the first position and the second position is shorter than a distance between the second position and the third position.

7. The dishwasher of claim 1, further comprising an interface that is configured to receive a command for operating the dishwasher, wherein the handle is configured to, based on the interface receiving a washing operation command, move in a rearward direction from the third position to the second position.

8. The dishwasher of claim 1, wherein the handle is configured to, based on the second sensor failing to detect the user within a reference time in a state in which the handle is disposed at the second position, move in a rearward direction from the second position to the first position.

9. The dishwasher of claim 1, wherein the second sensor is configured to be turned on based on the first sensor detecting the user.

10. The dishwasher of claim 9, wherein the handle is configured to, based on the second sensor failing to detect the user within a reference time in a state in which the handle is disposed at the second position, move in a rearward direction from the second position to the first position while the second sensor maintains a turn-on state.

11. The dishwasher of claim 1, wherein the dishwasher is configured to, based on the second sensor detecting the user during a washing operation, stop the washing operation and control the handle motor to move the handle in the forward direction from the second position to the third position.

12. The dishwasher of claim 1, further comprising a lighting system comprising a light source configured to emit light, the lighting system being configured to define a first pattern of the light at the handle based on the first sensor detecting the user in a state in which the handle is disposed at the second position.

13. The dishwasher of claim 12, wherein the lighting system is configured to vary a color of the light and a length of the first pattern at the handle based on an operating state of the dishwasher.

14. The dishwasher of claim 12, wherein the lighting system is configured to define a second pattern of the light at the handle based on the second sensor detecting the user in a state in which the handle is disposed at the third position.

15. The dishwasher of claim 1, wherein the dishwasher is configured to: operate based on (i) the first sensor detecting the user and (ii) the second sensor failing to detect the user while the handle is moving; and based on the second sensor detecting the user while the handle is moving, perform a safety operation for stopping movement of the handle.

16. The dishwasher of claim 15, further comprising a haptic actuator configured to vibrate the handle during the safety operation.

17. The dishwasher of claim 1, further comprising: a door switch configured to detect whether the door is opened or closed; and a handle switch configured to detect whether the handle is moving.

18. A dishwasher comprising: a tub that defines a washing chamber; a door configured to open and close the washing chamber, the door being configured to operate in one or more door modes; a handle disposed at the door, the handle being configured to be located at a first position in a first door mode among the one or more door modes; a handle motor configured to drive the handle in a front-rear direction; a first sensor disposed at the door; and a second sensor disposed above the first sensor and configured to maintain an off-state in the first door mode, wherein the door is configured to, based on the first sensor detecting a user in the first door mode, switch to a second door mode in which (i) the handle protrudes outward in a forward direction from the first position to a second position and (ii) the second sensor is turned on.

19. The dishwasher of claim 18, wherein the door is configured to, based on the second sensor detecting the user in the second door mode, switch to a third door mode in which the handle moves in the forward direction from the second position to a third position.

20. The dishwasher of claim 19, further comprising: an interface configured to receive a command for operating the dishwasher; and a door switch configured to detect whether the door is opened or closed, wherein the door is configured to, based on (i) the door being opened and closed in the third door mode and (ii) the interface receiving a washing operation command, switch to an operation mode in which the handle moves from the third position to the second position while the second sensor maintains a turn-on state.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other objects, features and advantages of the present disclosure will be more apparent from the following detailed description in conjunction with the accompanying drawings.

[0033] FIG. 1 is a perspective view showing an example of a dishwasher.

[0034] FIG. 2 is a perspective view showing a state in which the door of the dishwasher is open.

[0035] FIG. 3 is a schematic diagram showing an example of an interior of the dishwasher.

[0036] FIG. 4 is an internal block diagram of an example of the dishwasher.

[0037] FIGS. 5A, 5B, and 6 are diagrams showing example sensors.

[0038] FIGS. 7A to 9B are diagrams showing examples of the position and movement of a handle.

[0039] FIG. 10 is a flowchart of an example of a dishwasher control method.

[0040] FIG. 11 is a flowchart of an example of a dishwasher control method.

[0041] FIGS. 12 to 16 are diagrams showing examples of a lighting operation.

[0042] FIGS. 17-25 are flowcharts of examples of a dishwasher control method.

DETAILED DESCRIPTION

[0043] Hereinafter, implementations of the present disclosure will be described in detail with reference to the attached drawings. However, the present disclosure is not limited to these implementations and can be modified into various forms.

[0044] FIG. 1 is a perspective view showing an example of a dishwasher. FIG. 2 is a perspective view showing an example state in which the door of the dishwasher is open. FIG. 3 is a schematic diagram showing an example of an interior of the dishwasher.

[0045] Referring to FIG. 1, a dishwasher includes a tub 1. The tub 1 can provide a washing chamber 11. The washing chamber 11 can be provided inside the tub 1.

[0046] In some implementations, the tub 1 can have a hexahedral shape having one side open. The front of the tub 1 can be open.

[0047] The washing chamber 11 can be opened in a forward direction (see FIG. 2). The direction toward a rear from the opening of the washing chamber 11, i.e., the front-to-rear direction, can be referred to as a depth direction of the washing chamber 11.

[0048] The dishwasher can include a door 2 that opens and closes the washing chamber 11. The door 2 can be provided in front of the tub 1. The door 2 can be rotatably coupled to the front of the tub 1.

[0049] The lower portion of the door 2 can be coupled to the tub 1. The door 2 can be hinged to the front lower portion of the tub 1. The dishwasher can include a hinge 28 that rotatably couples the door 2 to the tub 1.

[0050] The door 2 can be opened so that the upper portion of the door 2 faces in a forward direction (see FIG. 2). For example, the door 2 can rotate downward to close the tub 1. The door 2 can rotate upward to open the tub 1.

[0051] The door 2 can include a front surface 211. The door 2 can include a door cover 21. The door cover 21 can provide the front surface 211 of the door 2. The door cover 21 can provide a side surface 218 of the door 2. The door cover 21 can provide an upper surface 213 of the door 2.

[0052] The dishwasher can include a handle 4. The handle 4 can be provided in front of the door 2. The handle 4 can be provided on the upper portion of the door 2. The handle 4 can be provided on the upper portion of the front surface 211 of the door. An upper portion 212 of the front surface of the door 2 can be disposed on the upper side of the handle 4.

[0053] The dishwasher can include a base 12. The base 12 can provide a bottom surface of the dishwasher.

[0054] The bottom of the tub 1 can be spaced upward from the base 12. A space 13 can be provided between the bottom of the tub 1 and the base 12. Components such as a printed circuit board (PCB) 14 (or main controller), a sump 61, and a pump 62, which will be described later, can be disposed in the space. Hereinafter, the space 13 is referred to as a machine room 13.

[0055] An interface 23 can be provided on the upper portion of the door 2. The interface 23 can be disposed on the upper surface 213 of the door.

[0056] The interface 23 can receive commands from a user. The interface 23 can provide information related to a dishwasher to a user.

[0057] For example, a user can input commands for a washing cycle and an operation option through the interface 23. For example, the interface 23 can display information related to a washing cycle and an operation option.

[0058] The main controller 14 can control the dishwasher. The main controller 14 can receive commands from a user through the interface 23. The main controller 14 can provide information related to the dishwasher to a user through the interface 23. For example, the main controller 14 can include an electric circuit, a PCB, a processor, a computer, etc.

[0059] Hereinafter, components described later can be controlled by the main controller 14.

[0060] Referring to FIG. 2, the dishwasher can further include a casing 15. The casing 15 can be disposed outside the tub 1.

[0061] The casing 15 can include a cabinet 16 and a top plate 17. The cabinet 16 can cover the side wall of the tub 1. The top plate 17 can cover the upper surface of the tub 1.

[0062] As described above, the washing chamber 11 is opened in a forward direction, and the door 2 can open and close the washing chamber 11.

[0063] The dishwasher can include a rack 67 disposed in the washing chamber 11. Washing target such as dishes, plates, and spoons can be disposed on the rack 67.

[0064] The rack 67 can include a first rack 671. The first rack 671 can be disposed in the lower portion of the washing chamber 11.

[0065] The rack 67 can include a second rack 672 disposed in an upper side of the first rack 671. The height of the position where the second rack 672 is disposed can be adjusted.

[0066] The dishwasher can include spray arms 661, 662. The spray arms 661, 662 can spray washing water toward the rack 67.

[0067] The spray arms 661, 662 can be disposed on the lower side of the rack 67. The spray arms 661, 662 can spray washing water toward the upper side.

[0068] The spray arms 661, 662 can include a first spray arm 661. The first spray arm 661 can be disposed on the lower side of the first rack 671.

[0069] The spray arms 661, 662 can include a second spray arm 662. The second spray arm 662 can be disposed in the lower side of the second rack 672. The door 2 can be opened so that the upper portion of the door 2 faces forward. The door 2 can include an inner panel 22. The inner panel 22 can face upward in a state where the door 2 is open. When a user places a washing object on a rack, water dripping from the washing object or the rack can fall on the inner panel 22.

[0070] The dishwasher can include a steam nozzle 665. The steam nozzle 665 can be provided on the door 2. The steam nozzle 665 can be provided on the inner panel 22.

[0071] The dishwasher can include a dispenser 26. The dispenser 26 can be provided on the inner panel 22.

[0072] Referring to FIG. 3, the rack 67 can be pulled out in a forward direction from the washing chamber 11. The rack 67 can be retracted into the rear and disposed in the washing chamber 11.

[0073] The rack 67 can include a third rack 673. The third rack 673 can be disposed on the upper side of the first rack 671. The third rack 673 can be disposed on the upper side of the second rack 672. The third rack 673 can be disposed at the uppermost position among the plurality of racks 67.

[0074] The spray arms 661, 662 can include a nozzle. The nozzle can spray washing water. The spray arms 661, 662 can be rotatable. The first spray arm 661 can be disposed on the lower side of the first rack 671. The first spray arm 661 can spray washing water toward the first rack 671.

[0075] The first spray arm 661 can be rotatably provided. The first spray arm 661 can be rotated by a motor. Alternatively, the washing water can rotate due to the reaction force of the force sprayed from the first nozzle 6613.

[0076] The second spray arm 662 can be disposed on the lower side of the second rack 672. The second spray arm 662 can be coupled to the second rack 672. The second spray arm 662 can spray washing water toward the second rack 672.

[0077] The second spray arm 662 can be rotatably provided. The washing water can rotate due to the reaction force of the force sprayed from the second nozzle 6623. Alternatively, the second spray arm 662 can be rotated by a motor.

[0078] The dishwasher can include a top nozzle 663. The top nozzle 663 can be disposed on the upper side of the rack 67. The top nozzle 663 can be provided on the ceiling of the washing chamber 11. The top nozzle 663 can spray washing water downward. The top nozzle 663 can spray washing water toward the rack 67. The top nozzle 663 can spray washing water toward the third rack 673.

[0079] The door 2 can include a door cover 21. In a state where the door 2 closes the washing chamber 11, the door cover 21 can be exposed to the outside.

[0080] The door 2 can include an inner panel 22. In a state where the door 2 closes the washing chamber 11, the inner panel 22 can face the washing chamber 11. In a state where the door 2 closes the washing chamber 11, the inner panel 22 can provide the front surface of the washing chamber 11.

[0081] The dishwasher can include a dispenser 26. The dispenser 26 can accommodate detergent. The dispenser 26 can accommodate tablet-type detergent. Alternatively, the dispenser can contain powdered detergent.

[0082] In some examples, some of the nozzles of the spray arms 661, 662 can be directed toward the dispenser 26 provided in the door 2.

[0083] The dishwasher can supply steam to the washing chamber 11. The steam nozzle 665 can supply steam to the washing chamber 11. The steam nozzle 665 is provided in the front of the washing chamber 11 and can supply steam toward the rear. The steam nozzle 665 is provided on the lower portion of the washing chamber 11 and can supply steam upward. The steam nozzle 665 is provided at the front lower portion of the washing chamber 11 and can supply steam toward the upper-rear side.

[0084] The steam nozzle 665 can be provided on the door 2. The steam nozzle 665 can be provided on the inner panel 22. The steam nozzle 665 can be provided on the lower portion of the inner panel 22. The steam nozzle 665 can be disposed at an angle with respect to a horizontal.

[0085] The dishwasher can include a sump 61. The sump 61 can receive water from an external water source such as a tap. The sump 61 can store water supplied from outside.

[0086] The sump 61 can receive water from an external water source through a water supply pipe 64. The water supply pipe 64 can be connected to an external water source. The water supply pipe 64 can connect the external water source and the sump 61.

[0087] A water supply valve 641 can isolate the water supply pipe 64. The water supply valve 641 can control the flow of water from an external water source to the sump 61.

[0088] The sump 61 can be provided on the lower side of the tub 1. The sump 61 can be disposed on the lower side of the bottom of the tub 1. The sump 61 can be disposed in the machine room 13. The sump 61 can be connected to the bottom of the tub 1 and can be disposed in the machine room 13.

[0089] The sump 61 can store water drained from the washing chamber 11.

[0090] The dishwasher can include a filter 611. The filter 611 can filter out foreign substances from the water flowing from the washing chamber 11 to the sump 61. The filter 611 can be disposed in the sump.

[0091] The dishwasher can include a pump 62 that supplies washing water to the washing chamber 11. The pump 62 can pump water from sump 61. The pump 62 can pump water and supply it to the spray arms 661, 662. The pump 62 can pump water and supply it to the top nozzle 663.

[0092] The pump 62 can include an impeller 623, a pump housing 625 that accommodates the impeller 623, and a washing motor 621 that rotates the impeller 623. The washing motor 621 can be a motor whose rotation speed can be varied. For example, the washing motor 621 can be a Brushless DC (BLDC) motor.

[0093] The dishwasher can include a heater 63 that heats wash water. The heater 63 can be connected to pump 62. The heater 63 can heat the water flowed into the pump 62.

[0094] A switching valve 65 can be connected to the washing pump 62. The switching valve 65 can receive washing water from the pump 62.

[0095] The switching valve 65 can be connected to the spray arms 661, 662 and the top nozzle 663. The switching valve 65 can distribute washing water. The switching valve 65 can selectively supply washing water to at least one of the first spray arm 661, the second spray arm 662, and the top nozzle 663.

[0096] A pump inlet pipe 642 can connect the sump 61 and the pump 62. When the pump 62 operates, water in the sump 61 can flow into the pump 62 through the pump inlet pipe 642.

[0097] A discharge pipe 644 can be connected to pump 62. The discharge pipe 644 can guide the water discharged from the pump 62 toward the spray arms 661, 662 and the top nozzle 663.

[0098] The discharge pipe 644 can be connected to the switching valve 65. The discharge pipe 644 can connect the pump 62 and the switching valve 65.

[0099] In some examples, connection pipes 651, 652, 653 can connect the spray arms 661, 662 and the top nozzle 663 to the switching valve 65.

[0100] The connection pipes 651, 652, 653 can include a first connection pipe 651 connected to the first spray arm 661. The first connection pipe 651 can be provided inside the first spray arm 661.

[0101] The connection pipes 651, 652, 653 can include a second connection pipe 652 connected to the second spray arm 662. The second connection pipe 652 can be provided on the rear wall of the tub 1.

[0102] The connection pipes 651, 652, 653 can include a third connection pipe 653 connected to the top nozzle 663. The third connection pipe 653 can be provided on the upper surface of the tub 1.

[0103] When the pump 62 operates, the washing water discharged from the pump 62 can flow into the switching valve 65. Washing water flowing into the switching valve 65 can flow into at least one of the plurality of connection pipes 651, 652, and 653 by the switching valve 65.

[0104] When the washing water flows into the first connection pipe 651, the washing water can be sprayed from the nozzle 6613 of the first spray arm 661.

[0105] When the washing water flows into the second connection pipe 652, the washing water can be sprayed from the nozzle 6623 of the second spray arm 662. When the washing water flows into the third connection pipe 653, the washing water can be sprayed from the top nozzle 663.

[0106] The washing water sprayed into the washing chamber 11 collects on the bottom and flows into the sump 61. The washing water flowing into the sump 61 can be sprayed into the washing chamber by the pump 62 and can be circulated again.

[0107] The sump 61 can be connected to a drain pump 69. A drain pipe 691 can connect the sump 61 and the drain pump 69. When the drain pump 69 operates, water in the sump 61 can be drained to the outside of the dishwasher.

[0108] A dishwasher includes a door 2, a handle 4 provided on the door 2, and a handle motor 41 that drives the handle 4.

[0109] The door 2 can include a door cover 21 providing a front surface 211, an upper surface 213, and a side surface 218. The front surface 211 of the door 2 can include an upper portion 212 disposed in the upper side of the handle 4.

[0110] An interface 23 can be disposed on the upper surface 213 of the door 2.

[0111] The door 2 can include an inner panel 22. The inner panel 22 can be narrower in the left-right direction than the door cover 21. Hereinafter, the left-right direction is also referred to as a width direction of door.

[0112] The handle 4 can extend in the width direction of the door 2. Both side ends of the handle 4 can be adjacent to the side surface 218 of the door 2. Alternatively, the handle 4 can extend to the side surface 218 of the door 2.

[0113] FIG. 4 is an internal block diagram of a dishwasher, and discloses main components for door control.

[0114] Referring to FIG. 4, the dishwasher can include a main controller 14 that controls overall operation. The main controller 14 can control the pump 62, the heater 63, the water supply valve 641, and the switch valve 65 in response to user commands input through the interface 23, and perform a washing operation (washing cycle), etc.

[0115] The interface 23 can include a mechanical input means (or mechanical key, a jog wheel, a jog switch, etc.) and a touch input means. For example, the touch input means can be configured as a virtual key, soft key, or visual key displayed on a touch screen through software processing, or as a touch key that is disposed on a part excluding the touch screen.

[0116] In addition, the main controller 14 can receive a user's voice input through the microphone 232 and control the dishwasher in response to the voice input. The microphone 232 can process external acoustic signals into electrical voice data.

[0117] The speaker 231 can output various notifications and information as sound.

[0118] In some examples, the speaker 231 and the microphone 232 can be configured as part of the interface 23.

[0119] In some examples, the door 2 can be equipped with a door controller 24 that controls the operation of the door. The door controller 24 can be mounted on a certain PCB, and the door controller 24 PCB can be accommodated inside the door 2. The door controller 24 and the main controller 14 can be connected through a signal line and can transmit and receive various signals. In addition, the door controller 24 can be connected to the main controller 14 through a power line to receive power.

[0120] For example, the door controller 14 can include an electric circuit, a PCB, a processor, a computer, etc.

[0121] In some implementations, the door controller 24 is integrated into the main controller 14, so that the operation of the door 2 can be directly controlled by one controller 14.

[0122] The door 2 is equipped with a handle motor 41 that drives the handle 4 in the front-rear direction. The door controller 24 can control the handle motor 41 to move the handle 4 in a forward or rearward direction.

[0123] When not in use, the handle 4 does not protrude from the front surface 211, but is retracted into the door 2, and is pulled out toward the front of the front surface 211 when in use. When not in use, the handle 4 is retracted into the door 2, thereby reducing the possibility of collision and damage to the handle 4 and maintaining a seamless design.

[0124] Since the handle 4 pops up when in use, the handle 4 can be referred to as a pop-up handle 4, and the handle motor 41 can be referred to as a pop-up handle motor 41.

[0125] In some examples, the handle 4 can be equipped with a lighting system 42 including one or more light sources (e.g. LED). The lighting system 42 can indicate the current state of the dishwasher through the color and pattern of the output light and intuitively provide various information to a user.

[0126] In some implementations, the handle 4 can be equipped with a haptic actuator 43. The haptic actuator 43 can include a vibration actuator or a haptic motor including a rotary motor, a linear motor, a vibration motor, or a particular type of motor, etc.

[0127] For instance, in an emergency situation, the haptic actuator 43 can vibrate, thereby allowing a user holding the handle 4 to immediately recognize the emergency situation.

[0128] The dishwasher is equipped with a number of sensors 25. The door 2 is equipped with a first sensor 251 and a second sensor 252 that detect a body in front of the dishwasher. The first sensor 251 and the second sensor 252 can detect the presence of a body or object in a non-contact manner.

[0129] The door controller 24 can control the motors 41, 43 and the interface 23 of the door 2 according to the control of the main controller 14. The door controller 24 can control the handle motor 41 based on data detected by the first and second sensors 251, 252.

[0130] The second sensor 252 can be positioned above the first sensor 251. The second sensor 252 can be disposed in an area adjacent to the handle 4. For example, the second sensor 252 can be provided on the handle 4.

[0131] The first sensor 251 and the second sensor 252 can use a sensor to determine the position and/or motion of objects and bodies in a non-contact manner, such as a position sensor, a proximity sensor, an infrared sensor, an ultrasonic sensor, a heat sensor, a radar sensor, and a lidar sensor.

[0132] In some examples, the second sensor 252, as a safety sensor to prevent malfunction, can use a sensor to which a design structure having no hole can be applicable such as a short-range electric field sensor (gesture sensor) or a capacitive touch sensor, and can be provided inside the handle 4.

[0133] The capacitive touch sensor can detect a human body by detecting capacitance and detecting the difference between the minute change in capacitance of the human body and a set value.

[0134] The short-range electric field sensor enables gesture/position tracking by recognizing multiple points using a short-range electric field.

[0135] FIGS. 5A and 5B and 6 are diagrams for explaining sensors.

[0136] FIGS. 5A and 5B illustrate a case where the first sensor 251 is disposed on the lower side of the door cover 21. FIG. 5A is a front view of the lower side of the door cover 21, and FIG. 5B is a side view of the lower side of the door cover 21.

[0137] Referring to FIGS. 5A and 5B, the first sensor 251 is disposed on the bottom surface 219 of the door cover 21. The first sensor 251 can include two first sensors 2511 and 2512 disposed at a certain distance apart on the bottom surface 219 of the door cover 21.

[0138] The first sensor 251 can detect whether there is a body in front with a first detection distance R1. The first detection distance R1 is a distance at which the first sensor 251 can detect a body, and when a body is within the first detection distance R1, the first sensor 251 can detect it. The first sensor 251 can detect a user's body, such as legs and feet, positioned within the front first detection distance R1, and transmit the detection result to the door controller 24.

[0139] Depending on the size of the door cover 21, a plurality of first sensors 2511 and 2512 can be disposed to be spaced apart. Referring to FIGS. 5A and 5B, a first-first sensor 2511 and a first-second sensor 2512 are disposed to be spaced apart from each other on the bottom surface 219 of the door cover 21.

[0140] Since a user's body, such as legs and feet, has a certain size even for a baby, even if a plurality of first sensors 2511 and 2512 are disposed so that there is an additional distance d2, d3 that is not sensed, the body positioned in front of the dishwasher can be monitored.

[0141] If a first-first sensor 2511 and a first-second sensor 2512 have a sensing range of a circle with a certain radius d1 when viewed from the front, the first-first sensor 2511 and the first-second sensor 2512 can be disposed to be spaced apart from each other by a certain distance d3 at a radius d1 on both sides of the door cover 21. In addition, the first-first sensor 2511 and the first-second sensor 2512 can be disposed to be further spaced apart by a certain distance d2 from the sum 2d1 of their respective radii d1.

[0142] FIG. 6 illustrates a case in which the second sensor 252 is disposed inside the handle 4. Referring to FIG. 6, the handle includes a front cover 44, and the second sensor 252 can be disposed on the inner surface of the front cover 44.

[0143] The second sensor 252 can include a plurality of sensors that extend in the width direction or are spaced apart in the width direction.

[0144] The first sensor 251 and the second sensor 252 can have a different detection distance. The detection distance R1 of the first sensor 251 can be longer than the detection distance R2 of the second sensor 252. The second detection distance R2 is a distance at which the second sensor 252 can detect the body. When a body is within the second detection distance R2, the second sensor 252 can detect the body.

[0145] The first sensor 251 is a primary sensor and can detect a body from a distance, and the second sensor 252 is a secondary sensor and can detect a body from a short distance. The first sensor 251 and the second sensor 252 can use a different type of sensing method.

[0146] In some implementations, by using the sensors 251 and 252 having different detection distances and disposing each of the sensors at an optimal position, it can be possible to appropriately respond to various situations. The first sensor 251 can have a first detection distance R1 in a forward direction, and the second sensor 252 can have a second detection distance R2 in a forward direction, where the second detection distance R2 can be different from the first detection distance R1. For example, the first detection distance R1 of the first sensor 251 can be longer than the second detection distance R2 of the second sensor 252.

[0147] FIGS. 7A to 9B are diagrams for explaining the positions and movements of a handle for various situations.

[0148] First, referring to A and B of FIGS. 6 and 7, when not in use, as a default state, the handle 4 can be positioned in a first position P1, and the first sensor 251, as a turned-on state, can detect whether a body exists at the first detection distance R1.

[0149] The first position P1 is a position where the front cover 44 of the handle 4 forms the door cover 21 and the front surface 211, and the front cover 44 can be positioned to be connected on an imaginary line of the front surface 211.

[0150] Referring to FIGS. 6 and 8A, when a body is detected by the first sensor 251, the handle motor 41 is driven, and the handle 4 is pulled out in a forward direction from the first position P1 to a second position P2.

[0151] In some examples, the second sensor 252 can be turned off and then turned on when a body is detected by the first sensor 251. The second sensor 252, which is a secondary sensor, can be turned on only in response to the detection of the first sensor 251, thereby reducing power consumption.

[0152] Referring to FIGS. 6 and 8B, in a state where the handle 4 is in the first position P1, when a body is detected by the second sensor 252, the handle motor 41 is driven, thereby allowing the handle 4 to move further forward.

[0153] Referring to FIGS. 6 and 9A, 9B, when a body is detected by the second sensor 252, the handle motor 41 is driven, so that the handle 4 moves forward from the second position P2 to a third position P3.

[0154] If the automatic pop-up of the handle 4 is controlled based on the sensing data of one sensor or one type of sensor, when a baby or pet is at a specific position in front of the dishwasher, the handle 4 can move and the door 2 can be opened or closed, so that collision, jamming, etc. can occur.

[0155] According to the present disclosure, the occurrence of an accident can be prevented by controlling the automatic movement of the handle 4, based on at least one of the sensing status, sensing order, and sensing time of the sensors 251 and 252 disposed at different positions.

[0156] For example, when the first sensor 251 detects a body at a distance, the handle 4 moves slightly up to the second position P2 where there is no space 46 for a user's hand to hold the handle 4, as there is a possibility of using a dishwasher.

[0157] Thereafter, the second sensor 252 inside the handle 4 secondly checks whether a user's hand is detected at close range, and the handle 4 moves to a third position P3 where a user can sufficiently hold the handle 4 to open the door 2, so that the user can conveniently open the door 2.

[0158] When the handle 4 moves forward to the third position P3, a space 46 where a hand can hold the handle 4 is formed between supports 45 on both sides of the handle 4.

[0159] The handle 4 can move in a front-rear direction within a range d13 between the first position P1 and the third position P3.

[0160] A distance d12 between the first position P1 and the second position P2 is shorter than a distance d23 between the second position P2 and the third position P3. That is, the distance d12 by which the handle 4 moves between the first position P1 and the second position P2 is shorter than the distance d23 by which the handle 4 moves between the second position P2 and the third position P3.

[0161] Not only the position of the handle 4 but also the light output state of the lighting system 42 can be adjusted to the situation. The lighting system 42 emits light, thereby allowing a user to intuitively recognize that the dishwasher is operating and that its own movement has been sensed. For example, when the first sensor 251 detects a body from a distance, the lighting system 42 can output light of a certain color as welcoming lighting.

[0162] When a body is detected by the first sensor 251, the lighting system 42 can emit LED in a certain pattern while the handle 4 moves to the second position P2. For example, white light can be output as welcoming lighting. Depending on the operating state of the dishwasher, the color and length of light output by the lighting system 42 can vary. Accordingly, a user can intuitively recognize the current operating state.

[0163] When the second sensor 252 detects a body, the lighting system 42 can output light in a certain pattern while the handle 4 moves to the third position P3. The lighting system 42 can output light in different patterns when the handle 4 is positioned in the first position P1 and when the handle 4 is positioned in the third position P3.

[0164] The second sensor 252 provided on the handle 4 serves as a safety sensor and confirms the user's intention to use, and the lighting system 42 outputs light appropriate for the situation, thereby improving user interface and user experience (UI/UX).

[0165] In some examples, when there is a user's washing operation command through the interface 23 or the microphone 232, the door controller 24 drives the handle motor 41 to move the handle 4 in a rearward direction. The handle 4 can be moved in a rearward direction from the third position P3 to the second position P2.

[0166] Thereafter, the main controller 14 can control the dishwasher to perform a washing operation.

[0167] In some examples, the dishwasher can further include a door switch 254 that detects whether the door 2 is opened or closed, and a handle switch 253 that detects whether the handle 4 is moved.

[0168] For example, the door switch 254 can have a switch type that is pressed when the door 2 is closed to transmit a signal to the door controller 24. The handle switch 253 can have a switch type that is pressed when the handle 4 is in the first position P1 where it is retracted to transmit a signal to the door controller 24.

[0169] Alternatively, the dishwasher can further include a door position sensor for detecting the position of the door 2 and a handle position sensor for detecting the position of the handle 4.

[0170] Based on the signal from the door switch 254, when it is determined that the door 2 is opened and then closed, the main controller 14 can switch the dishwasher into the operation mode and perform a washing operation.

[0171] Alternatively, the dishwasher can further include a sensor or camera that detects the internal state of the washing chamber 11, and when the door 2 is closed while a washing target such as dishes is disposed in the washing chamber 11, the main controller 14 can switch the dishwasher into the operating mode and perform a washing operation.

[0172] In some examples, while the handle 4 moves to the second position P2, the second sensor 252 detects a body for a reference time. If a body is not detected within the reference time, the handle 4 can move in a rearward direction from the second position P2 to the first position P1.

[0173] When the handle 4 is located in the first position P1, the second sensor 252 can be turned off.

[0174] Alternatively, the second sensor 252 can maintain an on-state for a certain period of time from a time when the handle 4 moves to the second position P2 and then returns to the first position P1.

[0175] In some examples, during the washing operation, when the second sensor 252 detects a body, the main controller 14 stops the washing operation. At this time, the door controller 24 can move the handle 4 in a forward direction from the second position P2 to the third position P3. Accordingly, even during a washing operation, the door 2 can be conveniently and safely opened if a user wishes.

[0176] In some examples, when the handle 4 is moving, if a body is detected by the first sensor 251 and a body is not detected by the second sensor 252, the dishwasher can operate normally according to the input from the interface 23 or the microphone 242. Otherwise, the dishwasher can perform a safety operation that stops the movement of the handle 4. The safety operations can include a notification operation that notifies a user of an emergency situation. For example, the haptic actuator 43 can vibrate the handle 4. In addition, the speaker 231 can output voice guidance such as, Please lift your hand. I will close the handle. In addition, the lighting system 42 can output red light that blinks in a certain cycle.

[0177] Hereinafter, a dishwasher control method according to various examples of the present disclosure will be described with reference to the drawings.

[0178] FIG. 10 is a flowchart of a dishwasher control method.

[0179] Referring to FIG. 10, in a first door mode state (S1010), the dishwasher detects a body in front by using the first sensor 251 (S1020).

[0180] The first door mode can be a default mode. In the first door mode, the handle 4 can be located in the first position P1, the first sensor 251 can be in an on state, and the second sensor 252 can be in an off state.

[0181] In the first door mode, the lighting system 42 can also be in an off state.

[0182] In some examples, there are a model that supports an automatic door opening drying function (slightly opening the door) and a model that does not support the function. Accordingly, the state of the door 2 in the first door mode can vary depending on the model.

[0183] When a body is detected by the first sensor 251 (S1020), the dishwasher switches to a second door mode (S1030). The second door mode can be a welcoming mode.

[0184] When the body is detected by the first sensor 251 (S1020), the handle motor 41 is driven and the handle 4 can be moved in a forward direction.

[0185] In the second door mode, the handle 4 is in the second position P2 and the second sensor 252 is also turned on, so that both the first and second sensors 251 and 252 can be turned on.

[0186] In the second door mode, the lighting system 42 is also turned on and welcoming lighting of a certain pattern (e.g. gradation) can be output.

[0187] When a body is detected by the second sensor 252 (S1040), the dishwasher switches to a third door mode (S1050). The third door mode can be a pop-up mode.

[0188] When the body is detected by the second sensor 252 (S1040), the handle motor 41 is driven and the handle 4 can be moved further in a forward direction.

[0189] In the third door mode, the handle 4 is in the third position P3, and the lighting system 42 is also turned on to output light in a certain pattern (e.g. white dimming).

[0190] Thereafter, the dishwasher switches to an operation mode that operates according to commands input by a user, such as washing operation (S1080).

[0191] The dishwasher can determine the open/closed state of the door 2 and the state of the washing chamber 11 by using the door switch 254 or other sensors (S1060).

[0192] In the third door mode, when the door 2 is opened and closed (S1060) and there is a washing operation command through the interface 23, etc. (S1070), the handle 4 moves from the third position P3 to the second position P2.

[0193] In the operation mode (S1080), the second sensor 252 maintains the on state to prepare for situations such as opening during operation.

[0194] In some examples, in the second door mode, if the second sensor 252 does not detect a body within a reference time (S1040), the dishwasher can be switched to the first door mode (S1010).

[0195] FIG. 11 is a flowchart of a dishwasher control method, and shows logic corresponding to door opening during operation.

[0196] Referring to FIG. 11, when the dishwasher is in an operation mode with washing operation (S1110), the second sensor 252 can detect a body (S1120).

[0197] When the second sensor 252 detects a body (S1120), the main controller 14 stops the washing operation (S1130). In addition, the dishwasher switches again to the second door mode (S1140). Accordingly, the handle 4 can be moved in a forward direction from the second position P2 to the third position P3 so that a user can open the door 2. The user can hold the handle 4 that moved to the third position P3 and open the door 2.

[0198] FIGS. 12 to 16 are diagrams for explaining a lighting operation.

[0199] FIG. 12 illustrates the second door mode. When in the second door mode, the lighting system 42 is turned on and welcoming lighting of a certain pattern can be output.

[0200] FIGS. 13A-13E illustrate various example patterns. FIG. 13A illustrates a pattern that blinks light of a certain color. FIG. 13B illustrates a clockwise rotating pattern, and FIG. 13C illustrates a counterclockwise rotating pattern.

[0201] FIG. 13D illustrates a left-right gradation lighting pattern from the inside to the outside, and FIG. 13E illustrates a left-right gradation lighting pattern from the outside to the inside.

[0202] In some examples, when the door is open during the operation described with reference to FIG. 11, the lighting system 42 can indicate whether the door 2 can be opened by using the color of the output light.

[0203] For example, to provide caution when opening the door because the internal temperature is high, the lighting system 42 can output red light. When the internal temperature is low, the lighting system 42 can output blue light.

[0204] FIGS. 14 and 15 illustrate the operation of the lighting system 42 in the operating mode of dishwasher.

[0205] Referring to FIG. 14, during a washing operation, the lighting system 42 can vary the length of output light depending on the degree of washing progress. When the lighting system 42 can emit light from a starting point P41 to an ending point P43, a section from the starting point P41 to the ending point P43 is mapped to the entire washing operation time, and light can be output up to a current point P42. Accordingly, a user can intuitively recognize the current step.

[0206] Referring to FIG. 15, when the washing operation is completed, the lighting system 42 can emit light throughout the entire section from the starting point P41 to the ending point P43.

[0207] In addition to the washing operation, the current step can be guided in the same way for other operations. In addition, depending on the type of operation, light can be output in different colors.

[0208] For example, the current operation and step can be guided to a user by using blue light for a washing operation, red light for a drying operation, white light for a steam operation, and black light for other operations.

[0209] FIG. 16 illustrates the operation of the lighting system 42 in the third door mode. Even in this case, the lighting system 42 can output light in one or more of various patterns, as described with reference to FIGS. 13A-13E.

[0210] FIG. 17 is a flowchart of a dishwasher control method.

[0211] Referring to FIG. 17, in the first door mode of the dishwasher, the handle 4 is located in the first position P1, the first sensor 251 is in the on state, and the lighting system 42 is in the off state (S1710).

[0212] When a body is detected by the first sensor 251 (S1720), in the turned-on dishwasher, the handle 4 moves to the second position P2, and it is switched to the second door mode the second sensor 252 is turned on (S1730).

[0213] In addition, in the second door mode, the lighting system 42 can also be turned on and welcoming lighting of a certain pattern can be output.

[0214] In some examples, when a body is detected by the second sensor 252 within a reference time (S1740), the dishwasher switches to the third door mode (S1750).

[0215] If the second sensor 252 does not detect a body within the reference time (S1750), in the dishwasher, the handle 4 moves in a rearward direction from the second position P2 to the second position P1, and the second sensor 252 can be switched to a fourth door mode that maintains the on-state (S1760). That is, the fourth door mode can be another default mode that is different from the first door mode only in the state of the second sensor 252.

[0216] There exists often an induction cooker, a microwave oven, a gas stove, and other cooking appliances above the dishwasher. Therefore, a user in front of the dishwasher can respond quickly when the user wants to open the door 2, by operating the second sensor 252 for a reference time to determine whether to switch to the third door mode, and then not turning off the second sensor 252 even if it returns to the default mode.

[0217] When in the fourth door mode, if the second sensor 252 detects a body, it can quickly switch to the third door mode without switching to the second door mode.

[0218] FIG. 18 is a flowchart of an example of a dishwasher control method.

[0219] Steps S1810, S1820, S1830, and S1840 of FIG. 18 can correspond to steps S1010, S1020, S1030, and S1040, respectively. Hereinafter, descriptions of the same steps will be omitted or briefly explained.

[0220] In some examples, if a body is not detected by the second sensor (S1840), the dishwasher can be switched to the fourth door mode described above (S1870).

[0221] If a body is not detected by the second sensor (S1840), the dishwasher can be switched to the third door mode (S1870). At this time, it can be determined whether the detection of the second sensor 252 is occurred during a user's input (S1860).

[0222] For example, when a user's hand or other body part that operates the interface 23 is detected by the second sensor 252 in the process of operating the interface 23, the door controller 24 can determine that the detection of the second sensor 252 corresponds to a user input.

[0223] In addition, when a long key, a gesture input, or a double tap input can be performed through the second sensor 252, the door controller 24 can check whether the operation corresponds to the input, and determine that the detection of the second sensor 252 corresponds to a user input.

[0224] If the detection of the second sensor 252 is determined to correspond to the user input (S1860), the dishwasher can be switched to the fourth door mode (S1870).

[0225] FIG. 19 is a flowchart of an example of a dishwasher control method.

[0226] Referring to FIG. 19, in the first door mode state, the dishwasher can detect a body in front through the first sensor 251. In the first door mode state, the handle 4 is located in the first position P1 and the lighting system 42 is in an off-state (S1900).

[0227] If the state in which a body is detected within the detection distance R1 by the first sensor 251 is equal to or longer than a first reference time (S1905), the dishwasher switches to the second door mode in which the handle 4 moves to the second position P2, and the sensor 252 is turned on (S1910).

[0228] In addition, in the second door mode, the lighting system 42 can also be turned on and welcoming lighting in certain pattern can be output.

[0229] In some examples, when a body is detected by the second sensor 252 within a second reference time (S1915), the dishwasher switches to the third door mode (S1920).

[0230] If the second sensor 252 does not detect a body within the second reference time (S1915), the dishwasher can be switched to the fourth door mode in which the handle 4 moves in a rearward direction from the second position P2 to the first position P1 and the second sensor 252 maintains the on-state (S1925).

[0231] In some examples, when in the fourth door mode (S1925), when the second sensor 252 detects a body (S1915), the dishwasher can quickly switch to the third door mode (S1920).

[0232] In some examples, if there is a user input through the interface 23 (S1930) and the door is opened and closed (S1935), the dishwasher can be switched to the operation mode (S1945).

[0233] Whether the door is opened or closed can be detected through the door switch 254 or other door position sensor.

[0234] In some examples, when it is switched from the third door mode (S1920) to the dishwasher operation mode (S1945), the handle 4 moves from the third position P3 to the second position P2 (S1940). When the handle 4 is moving in a rearward direction (S1940), a user's hand can become caught in the increasingly narrow space 46.

[0235] When the handle 4 is moving in a rearward direction, if a body is detected by the first sensor 251 and a body is not detected by the second sensor 252 (S1940), the dishwasher can be switched to the operation mode (S1945).

[0236] Otherwise (S1940), the dishwasher can perform a safety operation (S1940). The safety operation includes an operation that stops the movement of the handle 4. In addition, the safety operation can include a notification operation that notifies a user of an emergency situation. For example, the haptic actuator 43 can vibrate the handle 4. In addition, the speaker 231 can output voice guidance. In addition, the lighting system 42 can output red light that blinks at a certain period. In some examples, when the washing machine is in a washing operation mode (S945), a body can be detected by the second sensor 252 (S1955).

[0237] When the second sensor 252 detects a body (S1955), the dishwasher can be switched to a fifth door mode (S1960). The fifth door mode is a mode in which washing is stopped and the lighting system 42 indicates the internal temperature in color, and can be another pop-up mode.

[0238] In addition, if the first sensor 251 detects a body and the second sensor 252 detects a body within a certain time (S1955), the dishwasher can be switched to the fifth door mode (S1960).

[0239] In some examples, if the second sensor 252 does not detect a body (S1955), the dishwasher completes a set operation such as washing and drying. After the operation is completed, according to the settings, it can return to the first door mode.

[0240] FIG. 20 is a flowchart of an example of a dishwasher control method.

[0241] Steps S2000, S2005, S2010, S2015, and S2020 of FIG. 20 can correspond to steps S1900, S1905, S1910, S1915, and S1920, respectively. In addition, steps S2035, S2040, S2045, S2050, S2055, S2060, and S2065 of FIG. 20 can correspond to steps S1930, S1935, S1940, S1945, S1950, S1955, and S1960, respectively.

[0242] In some examples, a sensor is provided in the handle 4 and a certain input is possible from the handle 4 side. For example, when a long key, a gesture input, or a double tap input can be performed through the second sensor 252, the door controller 24 checks whether the operation corresponds to the input, and determines that the detection of the second sensor 252 corresponds to a user's input (S2030).

[0243] If the detection of the second sensor 252 is not determined to correspond to a user input (S2030), the dishwasher can be switched to the third door mode (S2020).

[0244] If the detection of the second sensor 252 is not determined to correspond to a user input (S2030), depending on whether the interface is input (S2035) and whether sensing is performed during movement (S2045), it can be switched to the dishwasher operation mode (S2050).

[0245] FIG. 21 is a flowchart of an example of a dishwasher control method.

[0246] Steps S2100, S2105, S2110, S2015, and S2020 of FIG. 21 can correspond to steps S1900, S1905, S1910, S1915, and S1920 of FIG. 19, respectively.

[0247] In some examples, if the second sensor 252 does not detect a body within the second reference time (S2115), the dishwasher can be returned to the first door mode as the handle 4 moves in a rearward direction from the second position P2 to the first position P1. (S2100).

[0248] If a body is detected by the second sensor 252 within the second reference time (S2115), the dishwasher is switched to the third door mode (S2120).

[0249] In addition, steps S2130, S2135, S2140, S2145, and S2150 of FIG. 20 can correspond to steps S1930, S1935, S1940, S1945, and S1950 of FIG. 19, respectively.

[0250] In some examples, when the dishwasher completes a set operation such as washing and drying (S2155), it can return to the first door mode (S2100).

[0251] FIG. 22 is a flowchart of a dishwasher control method.

[0252] Steps S2200, S2205, S2210, S2215, S2220, S2230, S2235, and S2240 of FIG. 22 can correspond to steps S2100, S2105, S2110, S2015, S2020, S2030, S2035, and S2040 of FIG. 21, respectively.

[0253] In some examples, if the safety operation is performed (S2250) and a hand is detected by the second sensor 252 (S2253), the safe operating state is maintained (S2250) because the situation has not yet been resolved.

[0254] If the safety operation is performed (S2250) and a hand is not detected by the second sensor 252 (S2253), the dishwasher can return to the third door mode (S2220).

[0255] In some examples, when the dishwasher completes a set operation such as washing and drying (S2255), it can return to the first door mode (S2200).

[0256] FIG. 23 is a flowchart of an example of a dishwasher control method.

[0257] Steps S2300, S2305, S2310, S2315, and S2320 of FIG. 23 can correspond to steps S1900, S1905, S1910, S1915, and S1920 of FIG. 19, respectively.

[0258] In some examples, if the second sensor 252 does not detect a body within the second reference time (S2315), the dishwasher can be returned to the first door mode as the handle 4 moves in a rearward direction from the second position P2 to the first position P1 (S2300).

[0259] If a body is detected by the second sensor 252 within the second reference time (S2315), the dishwasher is switched to the third door mode (S2320).

[0260] In addition, steps S2330, S2335, S2340, S2345, S2350, S2355, and S2360 of FIG. 23 can correspond to steps S1930, S1935, S1940, S1945, S1950, S1955, and S1960 of FIG. 19, respectively.

[0261] FIG. 24 is a flowchart of an example of a dishwasher control method.

[0262] Steps S2400, S2405, S2410, S2415, and S2420 of FIG. 24 can correspond to steps S1900, S1905, S1910, S1915, and S1920 of FIG. 19, respectively.

[0263] In addition, steps S2430, S2435, S2440, and S2445 of FIG. 24 can correspond to steps S1930, S1935, S1940, and S1945 of FIG. 19, respectively.

[0264] In some examples, when the dishwasher completes a set operation such as washing and drying (S2455), it can return to the first door mode (S2400).

[0265] FIG. 25 is a flowchart of an example of a dishwasher control method.

[0266] The example of FIG. 25 is a case in which a sensor is provided in the handle 4, and a certain input is possible from the handle 4 in the example of FIG. 24.

[0267] Accordingly, the control method further includes a step S2500 in which the door controller 24 checks whether the operation corresponds to the input and determines that the detection of the second sensor 252 corresponds to a user input.

[0268] If it is determined that the detection of the second sensor 252 corresponds to a user input (S2500), the dishwasher can be switched to the third door mode (S2420).

[0269] If it is not determined that the detection of the second sensor 252 corresponds to a user input (S2500), depending on whether the interface is input (S2430) or whether sensing is performed during movement (S2440), it can be switched to the dishwasher operation mode (S2445).

[0270] In some implementations, a dishwasher includes a door that can be conveniently opened and closed by using an automatically moving handle.

[0271] In some implementations, it can be possible to prevent accidents that may occur due to misidentification of a baby or companion animal when a handle is automatically driven, by using sensors that differ in at least one of the position, detection order, and detection distance.

[0272] In some implementations, it can be possible to maintain a seamless appearance of the dishwasher by retracting a handle into the inside of a door when not in use.

[0273] In some implementations, a handle can be moved to an optimal position according to the operating state or user's intention.

[0274] In some implementations, a user can intuitively recognize the operating state.

[0275] In some implementations, it can be possible to prevent user's fingers from being caught in an automatically moving handle.

[0276] While the present disclosure has been particularly shown and described with reference to exemplary implementations thereof, it will be understood by those of ordinary skill in the art that various changes in form and detail can be made herein without departing from the spirit and scope of the present disclosure as defined by the following claims and such modifications and variations should not be understood individually from the technical idea or aspect of the present disclosure.