Coffee machine

Abstract

The utility model relates to the technical field of coffee machines, in particular to a coffee machine. Comprising an upper shell, a lower shell and an extraction box, the upper shell is rotatably arranged at the top of the lower shell, and a water bin capable of containing the extraction box is arranged at one end of the top of the lower shell; a water pump, a battery and a first PCB (Printed Circuit Board) are arranged in the lower shell; the water pump and the battery are respectively connected with the first PCB; one end of the bottom of the upper shell is provided with an assembling cavity for assembling the extraction box, the assembling cavity is provided with a water outlet connecting piece and an extraction needle arranged on the water outlet connecting piece in a sleeving mode, the water bin and the water outlet connecting piece are connected with the water pump through water pipes, the extraction box is detachably connected to the assembling cavity, and the extraction box can be placed in the water bin after being detached; therefore, the coffee machine provided by the utility model is simple in overall structure, small in size and convenient for a user to store and carry when going out, the requirement of the user for drinking coffee anytime and anywhere is met, high-pressure water can be automatically generated when the coffee is brewed, the brewed coffee is rich in fragrance, and mobile equipment can be charged.

Description

Technical Field

[0001] This utility model relates to the field of coffee machine technology, and in particular to a coffee machine. Background Technology

[0002] With the improvement of living standards, coffee has become a symbol of modern lifestyle. Coffee is a beverage made from roasted and ground coffee beans. People gradually enjoy drinking a cup of coffee in the morning or during leisure time. Brewing a cup of rich and aromatic coffee during leisure time can not only greatly improve one's spirits, but also allow people to slowly enjoy the infinite relaxation and beauty of leisure time. However, existing coffee machines are generally large in size and can only be placed in the office or home. They are inconvenient to carry and cannot meet people's daily needs. Utility Model Content

[0003] The purpose of this invention is to provide a coffee machine that solves the problems of existing coffee machines occupying a large space, having an uncompact overall layout, and being inconvenient to carry.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] This utility model discloses a coffee machine, including an upper shell, a lower shell, and an extraction cartridge. The upper shell is rotatably mounted on top of the lower shell, and a water tank for housing the extraction cartridge is provided at one top end of the lower shell. A water pump, a battery, and a first PCB circuit board are disposed inside the lower shell, and the water pump and the battery are respectively connected to the first PCB circuit board. A second PCB circuit board is disposed inside the upper shell, and the first PCB circuit board is connected to the second PCB circuit board. An assembly cavity for assembling the extraction cartridge is provided at one bottom end of the upper shell. The assembly cavity has a water outlet connector and an extraction needle sleeved on the water outlet connector. The water tank and the water outlet connector are respectively connected to the water pump through water pipes. The extraction cartridge is detachably connected to the assembly cavity, and can be placed in the water tank after disassembly. The upper shell can be rotated horizontally relative to the lower shell to adjust the angle. The extraction cartridge is installed in the assembly cavity. When not in use, the extraction cartridge is removed and placed in the water tank, and the upper shell is rotated horizontally back to its initial position.

[0006] In a further embodiment of this utility model, the top of the lower housing is provided with a water tank mounting groove and a rotating groove. A limiting mounting seat is provided inside the lower housing below the rotating groove. The water tank is disposed in the water tank mounting groove. A hollow connecting part extends from the other end of the bottom of the upper housing. A limiting groove is provided inside the hollow connecting part. A limiting baffle is provided in the limiting groove. The hollow connecting part extends into the rotating groove and the limiting mounting seat and the limiting baffle are locked together by fasteners, so that the upper housing can rotate relative to the lower housing.

[0007] In a further embodiment of this utility model, the first PCB circuit board is provided with a charging port, multiple output ports, indicator lights, and a switch module. The front of the lower housing is provided with a button panel, which has a charging slot, an output slot, an indicator light hole, and a switch button. The charging slot is connected to the charging port, the output slot is connected to the output port, the indicator light hole is connected to the indicator light, and the switch module is connected to the switch button. An external charging power supply charges the battery through the first PCB circuit board; the battery supplies power to the output ports and the second PCB circuit board through the first PCB circuit board.

[0008] In a further embodiment of this utility model, a heating plate is provided at the bottom of the water tank, the heating plate is electrically connected to the first PCB circuit board, and a temperature sensor is provided on the heating plate, the temperature sensor being electrically connected to the heating plate.

[0009] As a further embodiment of this utility model, the top of the water tank is provided with a detachable cover, the bottom of the water tank is provided with a water outlet and a through hole, the water outlet is connected to the water inlet of the water pump through a water pipe, and the temperature sensor is disposed in the through hole.

[0010] As a further embodiment of this utility model, the lower housing is further provided with a mounting bracket and a heat dissipation device, the heat dissipation device being connected to the first PCB circuit board; the mounting bracket is provided with a first placement slot, a second placement slot and a third placement slot, the water tank is disposed in the first placement slot, the water pump is disposed in the second placement slot located below the water tank, and the first PCB circuit board is disposed in the third placement slot.

[0011] In a further embodiment of this utility model, the bottom of the lower housing is provided with a bottom cover, the bottom cover is provided with a plurality of air inlets and a plurality of air outlets, a partition is provided between the air inlets and the air outlets on the bottom cover, the battery, the first PCB circuit board, the water pump and the heating plate are located above the air outlets, and the heat dissipation device is disposed above the air inlets.

[0012] In a further embodiment of this utility model, the outlet end of the water pump is connected to one end of the outlet connector via a water pipe, and the other end of the outlet connector is connected to the extraction needle. The extraction needle has water injection holes on both sides. The top of the extraction box has an extraction chamber with an opening facing downwards, and the bottom of the extraction box has a flow hole that communicates with the extraction chamber.

[0013] In a further embodiment of this utility model, the surface of the rotating groove is provided with a plurality of equidistant annular hemispherical cavities and bosses, and the surface of the bosses is provided with semi-circular cavities; the bottom of the upper shell is provided with a semi-annular groove near the hollow connecting part, and one end of the semi-annular groove is provided with a raised hemisphere that mates with the hemispherical cavity, and the raised hemisphere is adapted to any one of the hemispherical cavities.

[0014] As a further embodiment of this utility model, a switch guide post is also provided inside the upper housing, and a spring is sleeved on the switch guide post; a placement slot is provided inside the upper housing near the protruding hemisphere, and the switch guide post is placed in the placement slot; a limit switch module is provided on the second PCB circuit board, one end of the switch guide post abuts against the limit switch module, and the other end of the switch guide post is adapted to the semi-circular cavity. When one end of the switch guide post is located in the semi-circular cavity on the protrusion, the other end of the switch guide post moves away from the limit switch module. When one end of the switch guide post moves away from the semi-circular cavity, the other end of the switch guide post touches the limit switch module by being compressed and raised by the spring.

[0015] In this coffee machine, the upper housing is rotatably mounted on top of the lower housing, allowing the upper housing to rotate 180 degrees horizontally relative to the lower housing. This facilitates the installation of the extraction cartridge into the assembly cavity of the upper housing during use. The extraction needle punctures the coffee capsule placed in the extraction chamber of the extraction cartridge. Hot water is pumped from the water tank into the extraction needle via a water pump, and then injected into the extraction chamber through the water inlet holes on both sides of the extraction needle to extract the coffee capsule or coffee powder. The extraction needle can puncture various coffee capsules, allowing users to choose the coffee type and flavor to the maximum extent. It also supports self-filling of coffee powder, thereby improving the extraction efficiency and effect. When not in use, the extraction cartridge can be removed and placed in the water tank for easy storage, and the upper housing can be rotated 180 degrees horizontally to return to the initial storage state. Therefore, the coffee machine provided by this invention has a simple overall structure and small size, making it easy for users to store and carry, meeting the user's need to drink coffee anytime, anywhere. It can automatically generate high-pressure water when brewing coffee, producing a rich aroma, and can also charge mobile devices. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the coffee machine provided in this embodiment of the utility model. Figure 1 .

[0017] Figure 2 This is a schematic diagram of the overall structure of the coffee machine provided in this embodiment of the utility model. Figure 2 .

[0018] Figure 3This is an exploded view of the upper casing of the coffee machine provided in this embodiment of the present invention.

[0019] Figure 4 This is a cross-sectional view of the upper housing of the coffee machine provided in this embodiment of the present invention.

[0020] Figure 5 This is an overall schematic diagram of the upper casing of the coffee machine provided in this embodiment of the present invention.

[0021] Figure 6 This is an exploded view of the lower casing of the coffee machine provided in this embodiment of the present invention.

[0022] Figure 7 This is a cross-sectional view of the overall structure of the coffee machine provided in this embodiment of the utility model.

[0023] Figure 8 This is a diagram showing the usage state of the coffee machine provided in this embodiment of the utility model.

[0024] Figure 9 This is a diagram showing the rotating state of the coffee machine provided in this embodiment of the utility model.

[0025] Figure 10 This is a diagram showing the coffee machine in its stored state according to an embodiment of this utility model. Detailed Implementation

[0026] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0027] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0028] Although terms such as "first," "second," etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the elements, components, regions, layers, or segments discussed below may be referred to as second elements, components, regions, layers, or segments without departing from the teachings of the exemplary embodiments.

[0029] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "rear," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0030] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0031] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0032] Please see Figures 1 to 10As shown, the coffee machine 100 provided in this embodiment of the present invention includes an upper housing 10, a lower housing 20, and an extraction chamber 30. The upper housing 10 is horizontally rotatable and mounted on top of the lower housing 20. One end of the top of the lower housing 20 is provided with a water tank 40 for housing the extraction chamber 30. The lower housing 20 is provided with a mounting bracket 27, a heat dissipation device 28, a water pump 21, a battery 22, and a first PCB circuit board 50. The battery 22 is a 20,000 mAh or larger capacity battery. The heat dissipation device 28 effectively solves the problem of excessively high internal temperature of the lower housing caused by the high-power heating plate. During operation, heat dissipation is achieved to prevent excessive internal temperature of the lower casing from affecting use, greatly improving the internal heat dissipation effect of the product; the mounting bracket 27 is provided with a first placement slot 271, a second placement slot 272, and a third placement slot 273. The water tank 40 is fixed to the first placement slot 271 by fasteners, the water pump 21 is fixed to the second placement slot 272 located below the water tank 40 by fasteners, the first PCB circuit board 50 is disposed in the third placement slot 273, and the heat dissipation device 28, the water pump 21, and the battery 22 are respectively connected to the first PCB circuit board 50; the upper casing A second PCB circuit board 11 is provided inside the upper housing 10, and the first PCB circuit board 50 is connected to the second PCB circuit board 11. One bottom end of the upper housing 10 is provided with an assembly cavity 12 for assembling the extraction box 30. The assembly cavity 12 is provided with a water outlet connector 13 and an extraction needle 14 fitted onto the water outlet connector. The water tank 40 is connected to the water inlet of the water pump 21 via a water pipe 15. The water outlet of the water pump 21 is connected to one end of the water outlet connector 13 via a water pipe 15. The other end of the water outlet connector 13 is connected to the extraction needle 14. Water injection points are provided on both sides of the extraction needle 14. The hole 141 allows for greater pressure and stronger impact when hot water flows out, ensuring more thorough contact between the hot water and coffee grounds for a more complete brewing process. The water tank 40 has a cavity for housing the extraction box 30. The top of the extraction box 30 has a downward-facing extraction chamber 31, and the bottom of the extraction box 30 has a flow hole 32 communicating with the extraction chamber 31. The extraction box 30 is detachably connected to the assembly cavity 12 via a threaded connection or other snap-fit ​​methods. After disassembly, the extraction box 30 can be placed inside the water tank 40.After the upper housing 10 is rotated 180 degrees horizontally relative to the lower housing 20, the extraction cartridge 30 can be installed in the assembly cavity 12 of the upper housing for easy use. The extraction needle 14 punctures the coffee capsule placed in the extraction cavity 31 of the extraction cartridge 30. Hot water is pumped from the water tank 40 into the extraction needle 14 through the water inlet 141 on both sides of the extraction needle 14 to extract the coffee capsule or coffee powder. The extraction needle 14 can puncture various coffee capsules, allowing users to choose the coffee type and flavor to the maximum extent. It also supports self-filling of coffee powder, thereby improving the extraction efficiency and effect. When not in use, the extraction cartridge 30 can be removed and placed in the water tank 40 for easy storage. Then, the upper housing 10 can be rotated 180 degrees horizontally relative to the lower housing 20 to return to the initial storage state.

[0033] In an embodiment of this utility model, the top of the lower housing 20 is provided with a water tank mounting groove 23 and a rotating groove 24. The water tank mounting groove 23 is connected to the mounting bracket seat 27 by fasteners. A limiting mounting seat 25 is provided inside the lower housing 20 below the rotating groove 24. The water tank 40 is disposed in the water tank mounting groove 23. A hollow connecting part 16 extends from the other end of the bottom of the upper housing 10. A limiting groove 163 is provided inside the hollow connecting part 16. A limiting baffle 17 is provided in the limiting groove 163. The hollow connecting part 16 extends into the rotating groove 24 and locks the limiting mounting seat 25 and the limiting baffle 17 by fasteners, thereby allowing the upper housing 10 to rotate relative to the lower housing 20.

[0034] In an embodiment of this utility model, the first PCB circuit board 50 is provided with a charging port 51, multiple output ports 52, indicator lights 53, and a switch module 54. The front of the lower housing 20 is provided with a button board 26, which is provided with a charging slot 261, an output slot 262, an indicator light hole 263, and a switch button 264. The charging slot 261 is connected to the charging port 51, the output slot 262 is connected to the output port 52, the indicator light hole 263 is connected to the indicator light 53, and the switch module 54 is connected to the switch button 264. An external charging power supply charges the battery 22 through the first PCB circuit board 50. The battery 22 supplies power to the output port 52 and the second PCB circuit board 11 through the first PCB circuit board 50. The output port 52 charges the mobile device, eliminating the need to carry an additional power bank.

[0035] In an embodiment of this utility model, a high-power heating plate 41 is provided at the bottom of the water tank 40, which can heat 60 ml of room temperature water to 92 degrees in about 1 minute. 92 degrees is the suitable temperature for most coffee extractions, realizing rapid heating of cold water, improving heating power, and greatly enhancing the user experience. The heating plate 41 is electrically connected to the first PCB circuit board 50, and the heating plate 41 is provided with a temperature sensor 42 for monitoring and controlling the temperature. The temperature sensor 42 is electrically connected to the heating plate 41.

[0036] In an embodiment of this utility model, the top of the water tank 40 is provided with a detachable cover 43, and the water tank 40 and the cover 43 are connected by a thread or by other means such as snap fasteners; the bottom of the water tank 40 is provided with a water outlet 44 and a through hole 45, the water outlet 44 is connected to the water inlet of the water pump 21 through a water pipe 15, and the temperature sensor 42 is set in the through hole 45 to monitor and control the temperature of the water in the water tank 40.

[0037] In an embodiment of this utility model, the bottom of the lower housing 20 is provided with a bottom cover 29, the bottom cover 29 is provided with a plurality of air inlets 291 and a plurality of air outlets 292, the bottom cover 29 is provided with a partition between the air inlets 291 and the air outlets 292, the battery 22, the first PCB circuit board 50, the water pump 21 and the heating plate 41 are located above the air outlets 292, the heat dissipation device 28 is provided above the air inlets 291, so that a U-shaped air duct is formed inside to fully cover the heat dissipation area, and the bottom of the bottom cover 29 is provided with a plurality of anti-slip pads.

[0038] In an embodiment of this utility model, the surface of the rotating groove 24 is provided with a plurality of equidistant annular hemispherical cavities 241 and bosses 242, and the surface of the bosses 242 is provided with semi-circular cavities 243; the bottom of the upper housing 10 is provided with a semi-annular groove 161 near the hollow connecting part 16, and one end of the semi-annular groove 161 is provided with a raised hemisphere 162 that cooperates with the hemispherical cavity 243. The raised hemisphere 162 is adapted to any one of the hemispherical cavities 243. When the upper housing 10 is rotated, the raised hemisphere 162 moves from one hemispherical cavity 243 to the next hemispherical cavity 243 to effectively prevent misalignment.

[0039] In this embodiment of the present invention, a switch guide post 18 is further provided inside the upper housing 10, and a spring 181 is sleeved on the switch guide post 18; a placement slot 19 is provided inside the upper housing 10 near the protruding hemisphere 162, and the switch guide post 18 is placed in the placement slot 19; a limit switch module 111 is provided on the second PCB circuit board 11, one end of the switch guide post 18 abuts against the limit switch module 111, and the other end of the switch guide post 18 is adapted to the semi-circular cavity 243. When one end of the switch guide post 18 is located in the semi-circular cavity 243 on the protrusion 242, the other end of the switch guide post 18 is away from the limit switch module 111. When one end of the switch guide post 18 is away from the semi-circular cavity 243, the other end of the switch guide post 18 is compressed and lifted by the spring 181. When the upper housing 10 rotates 180 degrees horizontally relative to the lower housing 20, it touches the limit switch module 111. When one end of the switch guide post 18 is pushed up, it presses against the limit switch module 111, switching to the coffee extraction function mode. At this time, the power bank discharge function module is disabled or restricted. When one end of the switch guide post 18 moves away from the limit switch module 111, it switches to the power bank function mode. The limit switch module 111 of the second PCB circuit board 11 realizes the switching between the power bank and coffee extraction function modules, avoiding the functional impact caused by voltage instability and other factors when using two functions at the same time. For example, when using the extraction and heating of cold water function, the battery output voltage will be pulled down because a large power is required. If the power bank function is also used at this time, it will not be able to charge because the battery voltage is pulled down.

[0040] The coffee machine provided in this embodiment operates as follows: First, the upper housing is rotated 180 degrees horizontally relative to the lower housing. Then, a coffee capsule or coffee powder is placed into the extraction chamber of the extraction box. The extraction needle is threaded into the assembly cavity of the upper housing. When a coffee capsule is used, the extraction needle can pierce the capsule placed in the extraction chamber. The heating plate inside the coffee machine is activated by a switch to heat the cold water in the water tank. After the temperature sensor detects that the water in the water tank is heated, the water pump pressurizes the hot water in the water tank and injects it into the extraction chamber through the water inlet holes on both sides of the extraction needle. The extracted coffee flows out through the flow hole connected to the extraction chamber, completing the coffee brewing process. When not in use, the extraction box can be removed and placed in the water tank, and then the upper housing can be rotated 180 degrees horizontally relative to the lower housing to return to its initial storage state. Therefore, when brewing coffee, the user only needs to press the control start button to complete the brewing process without any other operations, making coffee brewing simpler and faster. When the user's mobile device runs out of power, the data cable can be plugged into the output port on the lower housing to charge the mobile device, acting as a portable power bank.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A coffee maker characterized in that: The utility model provides a kind of portable water extraction device, including upper shell, lower shell and extraction box, the upper shell can be rotatably arranged in the top of the lower shell, the top of the lower shell is equipped with water sump that can accommodate the extraction box;Water pump, battery and first PCB circuit board are arranged in the lower shell, the water pump and the battery are connected with the first PCB circuit board respectively;Second PCB circuit board is arranged in the upper shell, the first PCB circuit board is connected with the second PCB circuit board;The bottom of the upper shell is equipped with assembly cavity for assembling the extraction box, the assembly cavity is equipped with water outlet connecting piece and extraction needle sleeved on water outlet connecting piece, the water sump and the water outlet connecting piece are connected with the water pump respectively by water pipe, the extraction box is detachably connected to the assembly cavity, and the extraction box can be placed in the water sump after being disassembled;The upper shell is horizontally rotated relative to the lower shell to adjust angle, the extraction box is installed in the assembly cavity, and the extraction box is placed in the water sump when not in use, and the upper shell is horizontally rotated back to the initial position.

2. The coffee maker of claim 1, wherein, The top of the lower shell is equipped with water sump mounting groove and rotating groove, the lower shell is equipped with limiting mounting seat below the rotating groove, the water sump is arranged in the water sump mounting groove, the bottom of the upper shell is equipped with hollow connecting part, the hollow connecting part is equipped with limiting groove, the limiting groove is equipped with limiting baffle, the hollow connecting part extends into the rotating groove, and the limiting mounting seat and the limiting baffle are locked by fastener, so that the upper shell can be rotated relative to the lower shell.

3. The coffee maker of claim 1, wherein, The first PCB circuit board is provided with a charging port, a plurality of output ports, an indicator light and a switch module, the front of the lower shell is provided with a key plate, the key plate is provided with a charging slot, an output slot, an indicator light hole and a switch key, the charging slot is connected with the charging port, the output slot is connected with the output port, the indicator light hole is connected with the indicator light, and the switch module is connected with the switch key. External charging power supply charges the battery through the first PCB circuit board; the battery supplies power to the output port and the second PCB circuit board through the first PCB circuit board.

4. The coffee maker of claim 1, wherein, The bottom of the water sump is equipped with a heating plate, the heating plate is electrically connected with the first PCB circuit board, the heating plate is provided with a temperature sensor, and the temperature sensor is electrically connected with the heating plate.

5. The coffee maker of claim 4, wherein, The top of the water sump is equipped with a detachable cover, the bottom of the water sump is equipped with a water outlet hole and a through hole, the water outlet hole is connected with the water inlet end of the water pump through a water pipe, and the temperature sensor is arranged in the through hole.

6. The coffee maker of claim 5, wherein, The lower shell is also provided with a mounting bracket seat and a heat dissipation device, and the heat dissipation device is connected with the first PCB circuit board;The mounting bracket seat is equipped with a first placing groove, a second placing groove and a third placing groove, the water sump is arranged in the first placing groove, the water pump is arranged in the second placing groove below the water sump, and the first PCB circuit board is arranged in the third placing groove.

7. The coffee maker of claim 6, wherein, The bottom of the lower shell is provided with a bottom cover, the bottom cover is provided with a plurality of air inlet holes and a plurality of air outlet holes, the bottom cover is provided with a partition plate between the air inlet holes and the air outlet holes, the battery, the first PCB circuit board, the water pump and the heating plate are located above the air outlet holes, and the heat dissipation device is arranged above the air inlet holes.

8. The coffee maker of claim 1, wherein, The water outlet end of the water pump is connected with one end of the water outlet connector in communication, the other end of the water outlet connector is connected with the extraction needle, and the extraction needle is provided with water injection holes on both sides; the top of the extraction box is provided with an extraction cavity with an opening downward, and the bottom of the extraction box is provided with a liquid flow hole in communication with the extraction cavity.

9. The coffee maker of claim 2, wherein, The surface of the rotating groove is provided with a plurality of equidistant annular hemispherical cavities and bosses, the surface of the boss is provided with a semicircular cavity; the bottom of the upper shell is provided with a semicircular groove near the surface of the hollow connecting portion, one end of the semicircular groove is provided with a protruding hemisphere matched with the hemispherical cavity, and the protruding hemisphere is matched with any one of the hemispherical cavities.

10. The coffee maker of claim 9, wherein, The upper shell is also provided with a switch guide column, and the switch guide column is sleeved with a spring; the upper shell is provided with a placing groove hole near the position of the protruding hemisphere, and the switch guide column is placed in the placing groove hole; the second PCB circuit board is provided with a limit switch module, one end of the switch guide column is in contact with the limit switch module, the other end of the switch guide column is matched with the semicircular cavity, when one end of the switch guide column is located in the semicircular cavity on the boss, the other end of the switch guide column is away from the limit switch module, when one end of the switch guide column is away from the semicircular cavity, the other end of the switch guide column is lifted by the compression of the spring and touches the limit switch module.

Images