Portable Coffee Machine

Abstract

A portable coffee machine includes a housing, a drainage module, an extraction module, and a controller, wherein the drainage module includes a water storing cup, a water pump, a conduit, and a drainage assembly, wherein the water storing cup is connected to the housing and is located at a top of the housing, the extraction module is detachably connected to the drainage module, the extraction module includes a transferring cup and an extraction container, the transferring cup is detachably connected to the extraction container, wherein the controller controls the water pump to pump the water in the water storing cup through the conduit and the drainage assembly into the extraction module for making coffee.

Claims

1. A portable electric pumping coffee machine, comprising: a housing, a drainage module, an extraction module, and a controller, wherein said drainage module comprises a water storing cup, a water pump, a conduit, and a drainage assembly, wherein said water storing cup is connected to said housing and is located at a top of said housing, said extraction module is detachably connected to said drainage module, said extraction module comprises a transferring cup and an extraction container, said transferring cup is detachably connected to said extraction container, wherein said controller comprises a control module for controlling said water pump to pump water in said water storing cup through said conduit and said drainage assembly into said extraction module.

2. The portable electric pumping coffee machine according to claim 1, wherein said extraction container is a first extraction container for extracting coffee powder, wherein said first extraction container is provided with a filtering layer and a one-way valve.

3. The portable electric pumping coffee machine according to claim 1, wherein said extraction container is a second extraction container which is used for extracting coffee from a coffee capsule and is equipped with at least one extraction blade.

4. The portable electric pumping coffee machine according to claim 1, wherein said drainage module comprises a limiting frame and a fixing base, wherein said limiting frame is provided with a first through hole away from a center thereof, one end of said drainage assembly is extended into said first through hole, and a protruding block is extended towards said center of said limiting frame at said first through hole, wherein said limiting frame comprises projections for limiting said drainage assembly, wherein said fixing base is connected with said limit frame, said fixing base is provided with a fifth groove, said fifth groove is provided with a second through hole.

5. The portable electric pumping coffee machine according to claim 1, wherein said portable electric pumping coffee machine further comprises a sensor assembly, a driving module and a power module comprising a battery, said sensor assembly is electrically connected to said power module, and said sensor assembly comprises a first sensor and a second sensor, wherein said first sensor is connected to said water storing cup to detect a temperature of water in said water storing cup, wherein said second sensor is connected to said battery to detect a temperature of said battery, wherein said driving module is electrically connected to said control module, and said driving module comprises a driving motor, wherein said driving motor is connected to said water pump for driving said water pump, wherein said power module is electrically connected to said control module and said driving module.

6. The portable electric pumping coffee machine according to claim 5, wherein said first sensor and said second sensor are temperature sensors.

7. The portable electric pumping coffee machine according to claim 1, wherein said portable electric pumping coffee machine further comprises a heating module, wherein said heating module comprises a heating member, said heating member is connected to said water storing cup, and said heating member is used for heating water in said water storing cup.

8. The portable electric pumping coffee machine according to claim 4, further comprising a mounting bracket, wherein a bottom of said mounting bracket is provided with said controller and an upper fixing arm, and said upper fixing arm is connected to said water storing cup, the other side of said bottom of said mounting bracket is provided with a lower fixing foot, which is connected to said limiting frame.

9. The portable electric pumping coffee machine according to claim 1, further comprising a coffee cup detachably coupled to said transferring cup.

10. The portable electric pumping coffee machine according to claim 3, wherein a fourth through hole is located near the extraction blade at an end of the second extraction container, and a side of the extraction blade is bent toward the direction of said fourth through hole.

11. The portable electric pumping coffee machine according to claim 1, wherein a peripheral hole provided in said water storing cup for communicating with said conduit which is connected to said drainage assembly, wherein said water pump is connected to said drainage assembly.

12. A heating assembly for a portable coffee machine, wherein said heating assembly comprises: a heating cup; a water pipe connected to said heating cup; and a heating member which is arranged to heat water in said heating cup.

13. The heating assembly for a portable coffee machine according to claim 12, wherein said water pipe is disposed at a peripheral edge of a bottom of said heating cup, wherein said heating member is installed at said bottom of said heating cup.

14. A portable coffee machine, comprising: a machine main body; and a heating assembly provided on said machine main body, wherein said heating assembly comprises: a heating cup; a water pipe connected to said heating cup; and a heating member which is arranged to heat water in said heating cup.

15. The portable coffee machine according to claim 14, wherein said machine main body, from top to bottom, comprises an top cover, a housing, and a coffee cup, wherein an upper supporting plate and a lower supporting plate are arranged inside said housing, wherein a water pump is arranged on said lower supporting plate, wherein a drain sleeve is installed below said lower supporting plate, wherein said water pump is connected to said heating cup through said water pipe, wherein said drain sleeve is connected to a supporting sleeve, wherein a diversion sleeve is arranged between said supporting sleeve and said drain sleeve, wherein a coffee capsule is adapted for being installed in said diversion sleeve, wherein said coffee cup is coupled to said drain sleeve, wherein said water pump pressurizes said water to pass through said drain sleeve and said diversion sleeve, so as to act on the coffee capsule for achieving brewing, coffee liquid enters said supporting sleeve and finally flows into said coffee cup.

16. The portable coffee machine according to claim 15, wherein a battery is housed in said space between said lower supporting plate and said upper supporting plate. said upper supporting plate is equipped with a control circuit board, which is connected to a vertical sub-board, wherein said sub-board is electrically with a control button and one or more indicator lights.

17. The portable coffee machine according to claim 16, wherein said top cover is provided with one or more breathable holes, and a one-way valve is installed at said breathable holes to avoid water leakage from said heating cup.

18. The portable coffee machine according to claim 17, wherein a top surface of said drain sleeve is provided with a collection groove and a collection hole is disposed at a center position, wherein said water pump is provided with an outlet, and said outlet is aligned with said collection groove.

19. The portable coffee machine according to claim 18, wherein said diversion sleeve is provided with a diversion groove at a top center, wherein a diversion hole is located on an outer side of said diversion groove, wherein a capsule compartment is defined inside said diversion sleeve, wherein a breaking blade is installed on a top of said capsule compartment.

20. The portable coffee machine according to claim 19, wherein a bottom of said supporting sleeve is equipped with a guide cone surface, and a convergence of said guide cone surface is provided with a coffee outlet hole.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0041] FIG. 1 is a schematic view of the structure of the present invention's portable electric pumping coffee machine.

[0042] FIG. 2 is an exploded view of the portable electric pumping coffee machine of the present invention.

[0043] FIG. 3 is another exploded view of the portable electric pumping coffee machine according to the present invention.

[0044] FIG. 4 is a side view of the portable electric pumping coffee machine of the present invention.

[0045] FIG. 5 is a schematic view of the fixing base of the portable electric pumping coffee machine of the present invention.

[0046] FIG. 6 is a schematic view of the structure of a second extraction container of the invention's portable electric pumping coffee machine.

[0047] FIG. 7 is a schematic view of the joint of a drainage module and a water pump of the portable electric pumping coffee machine of the present invention.

[0048] FIG. 8A and FIG. 8B are schematic views of the structure of a first extraction container of the portable electric pumping coffee machine of the present invention.

[0049] FIG. 9A and FIG. 9B are schematic views of an transferring cup of the portable electric pumping coffee machine of the present invention.

[0050] FIG. 10 is a schematic view of a water storing cup of the portable electric pumping coffee machine according to a first embodiment of the present invention.

[0051] FIG. 11 is a modular composition diagram of the portable electric pumping coffee machine according to the first embodiment of the present invention.

[0052] FIG. 12 is a schematic view of the water storing cup of the portable electric pumping coffee machine according to a second embodiment of the present invention.

[0053] FIG. 13 is a schematic view of the modular composition of the portable electric pumping coffee machine according to the second embodiment of the present invention.

[0054] FIG. 14 is a perspective view of a portable coffee machine according to a third embodiment of the present invention.

[0055] FIG. 15 is a schematic view of a back of the portable coffee machine according to the third embodiment of the present invention.

[0056] FIG. 16 is a sectional schematic view of the portable coffee machine according to the third embodiment of the present invention.

[0057] FIG. 17 is a schematic view of an internal structure of the housing of the portable coffee machine according to the third embodiment of the present invention.

[0058] FIG. 18 is a schematic view of a drain sleeve of the portable coffee machine of according to the third embodiment of the present invention.

[0059] FIG. 19 is a schematic view of the structure of a diversion sleeve of the portable coffee machine according to the third embodiment of the present invention.

[0060] FIG. 20 is a top view of the supporting sleeve of the portable coffee machine according to the third embodiment of the present invention.

[0061] FIG. 21 is a perspective view of the diversion sleeve of the portable coffee machine according to the third embodiment of the present invention.

[0062] FIG. 22 is a top view of the diversion sleeve of the portable coffee machine according to the third embodiment of the present invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0063] To make the above objectives, features, and advantages of the present invention more apparent and understandable, a detailed description of specific embodiments of the present invention will be given below in conjunction with the accompanying drawings.

Example 1

[0064] Referring to FIGS. 1-11, a portable electric pumping coffee machine is provided. The coffee machine comprises a housing 10, a cup lid 11, a coffee cup 12, a mounting bracket 90, a power module 70, a drainage module 20, an extraction module 30, a controller 40, a drive module 50, and a sensor assembly 60. The controller 40 comprises a control module 41. The drainage module 20 comprises a water storing cup 21, a water pump 22, a conduit 23, a drainage assembly 24, a fixing base 25, and a limiting frame 26. The fixing base 25 is connected to the limiting frame 26, which comprises a fixing projection 262 for fixing the drainage assembly 24. The water storing cup 21 is used for receiving and storing hot water, and the water pump 22 is used to draw water from the drainage module 20 into the extraction module 30. The drainage assembly 24 is connected to the water pump 22 and the conduit 23 to change the direction of water flow. The extraction module 30 comprises an transferring cup 31, a first extraction container 32, and a second extraction container 33. The first extraction container 32 is used for placing coffee powder, and the second extraction container 33 is used for placing a coffee capsule. The transferring cup 31 can be detachably connected to the first extraction container 32 or the second extraction container 33. The control module 41 is used to receive signals from the sensor assembly 60 and send instructions to the drive module 50. The drive module 50 comprises a driving motor 51 for driving the water pump 22 in the drainage module 20. The power module 70 comprises a battery 72 for powering the drive module 50.

[0065] One side of the housing 10 is equipped with a button 101 and or or more indicator lights 102. The side of the housing 10 far from button 101 has a charging interface slot, which corresponds to a charging interface on the controller 40. Threaded holes are located at the bottom edge of housing 10 and opening is located near the center at the bottom of housing 10. There is also a through slot extending from the center of the bottom of housing 10 towards the edge. The power module 70, the drainage module 20, the control module 41, the drive module 50, and the sensor assembly 60 are all installed inside housing 10. The mounting bracket 90 is connected to the water cup 21, and at the top of mounting bracket 90 is provided with the controller 40, the control module 41 is a circuit in the controller 40. A plurality of upper fixing arms 91 are located above the mounting bracket 90 to reserve space for the controller 40, while a plurality of lower fixing feet 92 are located below the mounting bracket 90 to engage with the limit frame 26. The sensor assembly 60 comprises a first sensor 61 and a second sensor 62.

[0066] As shown in FIG. 1, FIG. 9A and FIG. 9B, the cup lid 11 is connected to the water storing cup 21. A sealing ring is provided at the connection between the outer edge of the cup lid 11 and the water pump 22 to prevent water leakage. The top of the cup lid 11 is provided with an exhaust hole for venting water vapor. The central area of the bottom of the cup lid 11 is equipped with a soft pad which has a plastic protrusion at its center. Small gaps are formed at the interface between the soft pad and the plastic protrusion for water vapor discharge to avoid the influence of water vapor pressure on the cup lid 11 and the water storing cup 21. The water storing cup 21 is located at the top of the housing 10 and is connected to the upper fixed foot 91. Three clipping slots are provided at the bottom periphery of the water storing cup 21, and fixing claws are provided on the upper fixing arms 91. The water storing cup 21 is connected to the fixing claws of the upper fixing arms 91 by the clipping slots, and a sealing ring is provided at the outer edge of the water storing cup 21 to seal the connection between the water storing cup 21 and the housing 10. A peripheral hole 211 is provided at the bottom edge of the water storing cup 21, and the peripheral hole 211 is formed by a plurality of densely distributed small holes. A hollow column 212 is extended vertically outward below the peripheral hole 211 on the outer bottom of the water storing cup 21, and the hollow column 212 is connected to one end of the conduit 23, and the conduit 23 is wrapped on the outer surface of the hollow column 212. The conduit 23 can be a plastic hose. Due to the surface tension and atmospheric pressure of water, this structure can prevent water in the water storing cup 21 from flowing out of the conduit 23 when the water pump 22 is not working.

[0067] As shown in FIG. 7, the drainage assembly 24 comprises an inlet end 241, an outlet end 242, a first inlet hole 244, and a first outlet hole 243. The inlet end 241 of the drainage assembly 24 is extended upwardly from the top thereof, and the outlet end 242 is extended downwardly from the bottom of the drainage assembly 24. The inlet end 241 is connected to one end of the conduit 23, and one end of the conduit 23 is wrapped around the outer surface of the inlet end 241. A first cavity is defined below the inlet end 241, and the first cavity is cylindrical in shape and extends downwardly to the first outlet hole 243. A second cavity is arranged below the first inlet hole 244, and the second cavity is cylindrical in shape and is extended downwardly to the outlet end 242. The outer surface of the drainage assembly 24 is provided with a first groove 245, a second groove 246, and a threaded hole. The second groove 246 is deeper than the first groove 245 and is arranged side by side with the first groove 245 to avoid excessive pressure on the drainage assembly or overflow of water due to high water flow rate. The first outlet hole 243 is provided in the first groove 245 which is hexagonal in shape, and is centered in the first groove 245. The first inlet hole 244 is provided in the second groove 246 which is circular in shape and is located on one side of the circular edge of the groove away from the center. A sloping groove 247 is also provided in the second groove 246 to facilitate water flow into the first inlet hole 244 and avoid water overflow.

[0068] On one side of the water pump 22, there is a threaded hole, a third groove 513 and a fourth groove 514, wherein the third groove 513 and the fourth groove 514 are arranged side by side. The third groove 513 is hexagonal, and the fourth groove 514 is circular. Compared to the third groove 513, the mouth of the fourth groove 514 is deeper and can avoid water overflow. The second water outlet hole 511 is provided in the third groove 513 at the center of the third groove 513, and the second water inlet hole 512 is provided in the fourth groove 514 on one side of the circumference away from the center of the circle.

[0069] In the drainage assembly 24, one side of the first groove 245 and the second groove 246 is coupled to one side of the third groove 513 and the fourth groove 514 in the water pump 22 by thread connection. The first groove 245 is connected to the fourth groove 514, and the second groove 246 is connected to the third groove 513. The first water outlet hole 243 corresponds to the center of the fourth groove 514, and the water flows into the center of the fourth groove 514 from the first water outlet hole 243 and then flows into the second water inlet hole 512. The water flows into the center of the second groove 246 from the second water outlet hole 511, and then flows along the inclined groove 247 into the first water inlet hole 244. A waterproof gasket 515 is provided between the joint surface of the drainage assembly 24 and the water pump 22 to prevent water from overflowing. The water flows into the water inlet end 241 through the conduit 23, flows out from the first water outlet hole 243 along the first cavity, flows into the second water inlet hole 512 and enters the water pump 22. After pressurization by the water pump 22, the water flows out from the second water outlet hole 511 and then flows into the first water inlet hole 244, and flows out from the outlet end 242 along the second cavity. At this time, the position of the water flow is laterally offset.

[0070] As shown in FIG. 1, the limiting frame 26 is connected to the drainage assembly 24. The first through hole 263 is provided at the edge of the upper surface of the limiting frame 26, and the outlet end 242 extends into the first through hole 263. The limiting frame 26 is provided with a raised threaded hole on the upper surface, and the bottom of the housing 10 is provided with a threaded hole. The limiting frame 26 is connected to the bottom of the housing 10 through a thread. The limiting frame 26 is provided with a short protrusion 262 for limiting the drainage assembly 24. A raised block 264 extends from the first through hole 263 on the lower surface of the limiting frame 26 toward the center of the limiting frame 26, and a threaded hole is provided on the lower surface of the limiting frame 26.

[0071] As shown in FIG. 5, the fixing base 25 is located below the bottom of the housing 10, and a connector block is provided on the fixing base 25, while a connector slot is provided at the bottom of the housing 10, wherein the fixing base 25 is clipped and connected to the housing 10, and a sealing gasket is provided in the central area of the fixing base 25. The bottom of the fixing base 25 is provided with a threaded hole, which corresponds to an opening at the bottom of the housing 10. The limiting frame 26 above the bottom of the housing 10 is connected to the fixing base 25 through a threaded connection through an opening at the bottom of the housing 10. Beneath the protruding block 264 of the limiting frame 26, the fixing base 25 is arranged to align with the fifth groove 251, and the edge of the protruding block 264 passes through the penetrating groove at the bottom of the housing 10 and is fitted to the edge of the fifth groove 251. The center position of the fixing base 25 in the fifth groove 251 is provided with a second through hole 252. Water flows into the fifth groove 251 from the first through hole 263 at the water outlet 242, and then flows out of the fifth groove 251 through the second through hole 252. A sealing ring is provided around the edge of the fifth groove 251 to prevent the leakage of water.

[0072] As shown in FIG. 8A and FIG. 8B, the first extraction container 32 comprises a cover body 321 and a container body 322 for extracting coffee powder. The top of the cover body 321 is provided with a third through hole 323 arranged in a ring shape, which can allow the water to flow in and form a circulation to fully extract the coffee powder. The bottom of the container body 322 is provided with a filtering layer 324 made of metal material, and the edge of the filtering layer 324 is provided with a plurality of upward extending buckles for convenient disassembly and cleaning. A one-way valve 325 is provided at the center of the outer bottom of the container body 322 to prevent the reflux of coffee liquid caused by high pressure after the water pump 22 stops running. After the water flows out from the second through hole 252, it flows into the third through hole 323 on the top of the cover body 321, and then enters the container body 322 through the third through hole 323. When the water pump 22 starts in operation, a pressure difference is formed near the water pump 22 due to the centrifugal force, and the water flow is sucked into the guide tube 23 and enters the drainage assembly 24. The pressurized water flow can open the one-way valve 325, and after passing through the filtering layer 324, the water flow flows out from the one-way valve 325. The filtering layer 324 contains a plurality of densely arranged small holes in a ring shape, which can form a circulation when the coffee liquid passes through, further increasing the pressure and facilitating the water flow to open the one-way valve 325.

[0073] As shown in FIG. 6, there is a hexagonal groove in the center of the bottom of the second extraction container 33, and there are a plurality of extraction blades 331 extending upward at the edge of the hexagonal groove. The outer wall of the second extraction container 33 is equipped with a fitting slot, and the inner wall of the second extraction container 33 is equipped with threads. The coffee capsule can rotate into the second extraction container 33, which is convenient for the extraction blades 331 to puncture the bottom of the coffee capsule. There is a fourth through hole 333 near the edge of the bottom of the second extraction container 33 where it is close to the extraction blade 331. Each extraction blade 331 is arranged at a position corresponding to a fourth through hole 333, and water flows in from the fourth through holes 333 so as to flow into the coffee capsule and extract the coffee in the coffee capsule. The extraction blades 331 are bent towards the direction of the fourth through holes 333 at the side, so that the water flow from the fourth through hole 333 fully flows into the coffee capsule along the extraction blades 331.

[0074] As shown in FIG. 9A and FIG. 9B, there is a plurality of protrusions arranged in a square array on the bottom center circular area of the transferring cup 31. The protrusions on the bottom of the transferring cup 31 can reserve the space required for the film expansion, make the film easier to be punctured, and adapt to the shape of the film on top of some models of coffee capsules. There are small holes between the protrusions, located in the center of the adjacent four protrusions. a plurality of clipping blocks is provided near the bottom of the inner wall of the transferring cup 31. A first extraction container 32 can be placed inside the transferring cup 31. The first extraction container 32 is filled with coffee powder. After extraction, the extracted coffee flows out through the small holes at the bottom of the transferring cup 31 and gathers along the inclined grooves to the transferring cup outlet 311, then flows out of the transferring cup 31. A second extraction container 33 can also be placed inside the transferring cup 31. The second extraction container 33 is filled with the coffee capsule. The clipping slots of the second extraction container 33 can be matched with the clipping blocks of the transferring cup 31 to limit the rotation of the second extraction container 33 in the transferring cup 31. During the extraction process, water flows into the coffee capsule and can flow along the extraction blades 331 to extract the coffee. When the internal pressure of the coffee capsule reaches a threshold, the coffee liquid punctures the film on top of the coffee capsule and flows out of the transferring cup 31 through the small holes. Then it flows into the coffee cup 12, which is connected to the fixing base 25, and the transferring cup 31 is provided in the coffee cup 12.

[0075] As shown in FIGS. 2-3, the first sensor 61 is located at the bottom of the water storing cup 21, and the second sensor 62 is located on the battery 72. The first sensor 61 and the second sensor 62 can be temperature sensors. The first sensor 61 is used to measure the water temperature in the water storing cup 21, and the second temperature sensor 62 is used to measure the temperature of the battery 72. When the first sensor 61 detects that the water temperature in the water storing cup 21 is 20° C.-40° C., it sends a sensing signal to the control module 41. The control module 41 sends an instruction to the indicator light 102, and one indicator light 102 lights up. When the first sensor 61 detects that the water temperature in the water storing cup 21 is 41° C.-60° C., it sends a sensing signal to the control module 41. The control module 41 sends an instruction to the indicator light 102, and two indicator lights 102 light up. When the first sensor 61 detects that the water temperature in the water storing cup 21 is 61° C.-80° C., it sends a sensing signal to the control module 41. The control module 41 sends an instruction to the indicator light 102, and three indicator lights 102 light up. When the first sensor 61 detects that the water temperature in the water storing cup 21 is 81° C.-96° C., it sends a sensing signal to the control module 41. The control module 41 sends an instruction to the indicator light 102, and four indicator lights 102 light up. When the second sensor 62 detects that the temperature of the battery 72 is greater than the preset value, it sends a sensing signal to the control module 41. The control module 41 sends an instruction to the buzzer on the controller 40 to make the buzzer beep, and at the same time, the control module 41 cuts off the power to avoid the battery 72 from overheating, where the controller can be used.

[0076] After the button 101 is continuously pressed for to seconds, the water pump 22 runs. When the water pump 22 runs, the water in the storage cup 21 flows into the drainage assembly 24 along the conduit 23, flows out of the drainage assembly 24 after being pressurized by the water pump 22, and flows into the first extraction container 32 or the second extraction container 33 for extraction after passing through the limiting frame 26 and the fixing base 25, and then flows into the liquid cup 12 through the transferring cup 31. To can be 1-3 seconds.

[0077] When the first sensor 61 detects that the water temperature within the storage cup 21 exceeds the preset value T.sub.1, it sends a sensing signal to the control module 41. The control module 41 sends instructions to the buzzer, which beeps to indicate that hot water is inside the storage cup 21. At the same time, the control module 41 sends instructions to drive the water pump 22 through the driving motor 51. T.sub.1 can 70° C.-100° C., or 80° C.-96° C.

Example 2

[0078] Referring to FIGS. 1-9 and FIGS. 12-13, the difference from the first Embodiment is that the portable coffee machine further comprises a heating module 80. The heating module 80 comprises a heating member 81 which is a heating plate, which may be a ceramic heating plate or a silicone heating plate. The heating member 81 is located at the bottom of the water storing cup 21. When the button 101 on the housing 10 is continuously pressed for a duration ti of several seconds, the control module 41 sends an instruction to the buzzer, and the buzzer emits a beep. At the same time, the control module 41 sends an instruction to the heating module 80 to heat and boil the water in the water storing cup 21 by the heating member 81. When the first sensor 61 detects that the temperature is higher than the provided value T.sub.1, it sends a sensing signal to the control module 41. The control module 41 sends an instruction to the buzzer to beep, indicating that the water in the water storing cup 21 has been heated. The control module 41 then sends an instruction to the heating module 80 to stop working and an instruction to the driving motor 51 to drive the water pump 22. T.sub.1 can 70° C.-100° C., or 80° C.-96° C., the duration ti may be 2-5 seconds, or otherwise as desired.

Example 3

[0079] As shown in FIGS. 14 to 17, the present invention discloses a heating assembly in the third embodiment which is applied in a portable coffee machine, the heating assembly comprises a heating cup 2a. The heating cup 2a is connected with a water pipe 21a. The heating element is arranged on the outer surrounding wall or the bottom of the heating cup 2a to heat and boil the water in the heating cup 2a. The water pipe 21a is arranged on the outer side of the bottom of the heating cup 2a. The heating element is a heating member 22a which is installed at the bottom of the heating cup 2a.

[0080] In this solution, the outlet of the heating cup 2a is located on a peripheral edge thereof, and the water pipe 21a of the heating cup 2a is connected to the edge of the heating cup 2a. This provides an installation area for the heating member 22a at the bottom of the heating cup, avoiding the water pipe 21a from passing through the heating member which is a heating plate. It can ensure the heating efficiency, avoid damage to the water pipe 21a, and reduce production costs.

[0081] The present invention discloses another solution for a heating component in one of its alternative embodiment, wherein the heating member is positioned at the bottom of the heating cup 2a, and the water pipe 21a is located at the center of the bottom of the heating cup 2a, and passes through the heating device.

[0082] Another embodiment of the present invention discloses a another heating solution, in which the heating device is a heating tube that is wound around the outer wall and bottom of the heating cup 2a. Space is left in the heating tube for the water pipe 21a to pass through.

[0083] Another alternative mode of the present invention discloses a heating member 22a which comprises a surrounding covering wall covered on the outer wall and the bottom of the heating cup 2a. Additionally, a hole is provided at a bottom of the heating member 22a for the water pipe 21a to pass through when the heating member 22a is extended to the bottom of the heating cup 2a. Alternatively, the heating member 22a may be only attached to the outer surrounding wall of the heating cup 2a.

[0084] As shown in FIGS. 14 to 22, the present invention discloses a portable coffee machine comprising the a machine main body 1a, wherein the machine main body 1a employs the heating assembly as disclosed.

[0085] The machine main body 1a, from top to bottom, comprises a top cover 12a, a housing 11a and a coffee cup 13a. The heating cup is located between the housing 11a and the top cover 12a. The brewing mechanism is located at the bottom of the housing 11a and between the coffee cup 13a.

[0086] The housing 11a is provided with an upper supporting plate 14a and a lower supporting plate 15a. The water pump 3a is installed on the lower supporting plate 15a, and the drain sleeve 4a is installed below it. The water pump 3a is connected to the heating cup 2a through the water pipe 21a.

[0087] The brewing mechanism comprises a water pump 3a, a drain sleeve 4a, a supporting sleeve 5a, and a diversion sleeve 6a. The drain sleeve 4a is threaded to connect with the supporting sleeve 5a. The diversion sleeve 6a is provided between the supporting sleeve 5a and the drain sleeve 4a. The coffee capsule 10a is installed inside the diversion sleeve 6a. The coffee cup 13a is then placed at the drain sleeve 4a and can be sealed with either a snap-fit or threaded connection.

[0088] During the brewing process, the water pump 3a draws water from the heating cup and pressurizes it to pass through drain sleeve 4a and diversion sleeve 6a, and the water acts on the coffee capsule 10a to achieve brewing, then the coffee liquid passes through the coffee outlet hole 52a of the supporting sleeve 5a and finally flows into the coffee cup 13a.

[0089] An electric battery 151a is placed in the space between the lower supporting plate 15a and the upper supporting plate 14a to provide power supply to this device.

[0090] On the upper supporting plate 14a, there is a control circuit board 141a installed, which is connected to a vertical sub-board 142a. The sub-board 142a has a control button 111a and an indicator light 112a below it. The housing 11a also has a charging port 113A, which is connected to the circuit board 141a installed on the upper supporting plate.

[0091] At the heating cup 2a, there is also a temperature sensor connected to the circuit board 141a for detecting if the water in heating cup 2a is hot water. After it is determined that it is not hot water, the heating member 22a will begin to work, and when it is determined that the water in the heating cup 2a is hot water, the water pump will be automatically driven to pump the hot water into the coffee capsule 10a.

[0092] In addition, to ensure pressure balance and avoid the problem of water not being discharged, there is a breath hole 121a at the top of the top cover 12a of this device, and a one-way valve is installed at the breath hole 121a to prevent water leakage from the heating cup. When the water pump 3a works to suck the water from the heating cup 2a into the drain sleeve 4a and the diversion sleeve 6a, the air pressure inside the heating cup 2a decreases, and air enters through the breath hole 121a to maintain pressure equilibrium.

[0093] Because the settings of the water pipe 21a and the heating member 22a are diversified, the device is equipped with the drain sleeve 4a, which is used to correctly guide the hot water to the diversion sleeve 6a. A collection groove 41a is provided on the top surface of the drain sleeve 4a, and a collection hole 42a is arranged at the center. The water pump 3a is provided with an outlet 31a, which is aligned with the collection groove 41a below the outlet 31a.

[0094] The drain sleeve 4a is provided with several connecting pins 43a, and is fixedly installed at the lower supporting plate 15a through the connecting pins 43a.

[0095] The purpose of the diversion sleeve 6a in this device is to evenly disperse the collected hot water, so as to fully act on the coffee powder in the coffee capsule and achieve the purpose of uniform mixing. Therefore, a diversion groove 61a is provided in the middle of the top surface of the diversion sleeve 6a, and a diversion hole 62a is provided on the outer side of the diversion groove 61a. The capsule compartment 64a is installed inside the diversion sleeve 6a, and one or more breaking blades 7a are installed on the top of the capsule compartment 64a. The breaking blade 7a is used to cut open the outer wall of the coffee capsule 10a, so that the water flowing down from the diversion hole 62a can fully mix with the coffee powder.

[0096] The diversion sleeve 6a is equipped with flanges 63a on both sides, and can be firmly retained between the supporting sleeve 5a and the drain sleeve 4a by the flanges 63a.

[0097] The inner wall of the capsule compartment 64a is provided with several protrusion strips 641a, which provide sufficient friction to prevent the coffee capsule 10a from slipping and provide guidance for the water flow.

[0098] The supporting sleeve 5a is equipped with a guide cone surface 51a at the bottom, and a coffee outlet hole 52a is provided at the convergence of the guide cone surface 51a. The bottom plate 8a is placed inside the supporting sleeve 5a, with several protrusions on the bottom plate 8a to hold the coffee capsule 10a, and several spikes are also provided on the bottom plate 8a.

[0099] The supporting sleeve 5a is provided with an external thread 53a, and the drain sleeve 4a is provided with an internal threaded portion 44a, and they are connected and installed through the threads.

[0100] The above description is only the disclosure of the preferred embodiment of the present invention, and the implementation and scope of the present invention should not be limited thereto. Those skilled in the art should be able to realize that any equivalent substitution and obvious modification made based on the disclosure and illustrations of the present invention are within the scope of the present invention.