Improvements in coffee machines

Abstract

The utility model discloses a coffee machine improved structure, including base, be provided with water tank, water pump, extraction mechanism and control circuit board on the base, and extraction mechanism includes heating device, brewing subassembly and multi -way connector, and be provided with the first communicating port and second communicating port of intercommunication on multi -way connector, and the water pump both ends respectively communicate water tank and the water inlet end of heating device, and the water outlet end of heating device communicates the first communicating port, its characterized in that, still including first solenoid valve, be provided with first inlet, first outlet and second outlet on first solenoid valve, and first inlet communicates second communicating port, and first outlet communicates brewing subassembly, when first inlet and first outlet of first solenoid valve communicate, and first inlet and second outlet between are in closed state, and control circuit board respectively with water pump, heating device and first solenoid valve electric connection, this coffee machine improved structure can realize the timely pressure relief of extraction mechanism, guarantees the normal use and service life of brewing subassembly and other components.

Description

Technical Field

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

[0002] Existing coffee machines, such as the one described in Chinese Invention Patent CN120419792A (title: A Coffee Machine with an Independent Water Circuit and Refrigeration System, authorized on August 5, 2025), include a base. An extraction mechanism is located on the upper front of the base. A water pump is fixedly connected to the top wall of the base. One end of the water pump's output pipe is connected to a pump outlet pipe, and the other end of the pump outlet pipe is connected to a solenoid valve. A cold water inlet pipe is connected to the other side of the rear wall of the solenoid valve, and the other end of the cold water inlet pipe is connected to a refrigeration device. The output end of the refrigeration device is connected to a cold water outlet pipe, and the other end of the cold water outlet pipe is connected to the other side of the front wall of the solenoid valve. A main water outlet pipe is connected to one side of the bottom of the solenoid valve, and the other end of the main water outlet pipe is connected to an extraction chamber. This invention, through its extraction mechanism, allows the coffee machine to flexibly produce either hot or cold coffee without needing to add ice to cool the coffee after it has been made using a hot extraction method.

[0003] However, the coffee machine with the above structure still has the following shortcomings: (1) After the hot brewing of coffee is completed, hot water is easily left in the extraction chamber and the extraction water supply path, and the internal environment is easily high temperature and high pressure. The pressure difference between the inside and outside of the extraction chamber is too large, which will affect the normal disassembly of the relevant components of the extraction chamber (such as the brewing funnel). Long-term use in a high temperature and high pressure environment will cause damage to the relevant components of the extraction chamber, affecting the normal use and service life of the product. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of the existing technology and provide an improved coffee machine structure that can release pressure in a timely manner, ensuring the normal use and service life of the product.

[0005] The purpose of this utility model is achieved as follows: An improved coffee machine structure includes a base, on which a water tank, a water pump, an extraction mechanism, and a control circuit board are mounted. The extraction mechanism includes a heating device, a brewing assembly, and a multi-port connector. The multi-port connector has a first connecting port and a second connecting port. The two ends of the water pump are respectively connected to the inlet of the water tank and the inlet of the heating device, and the outlet of the heating device is connected to the first connecting port. The machine is characterized by further including a first solenoid valve, which has a first inlet, a first outlet, and a second outlet. The first inlet is connected to the second connecting port, and the first outlet is connected to the brewing assembly. When the first inlet and the first outlet of the first solenoid valve are connected, the first inlet and the second outlet are in a closed state. The control circuit board is electrically connected to the water pump, the heating device, and the first solenoid valve.

[0006] This coffee machine features an improved structure. After hot coffee is brewed, the control circuit board can connect the first inlet and the second outlet of the first solenoid valve, allowing residual hot water in the extraction mechanism to be quickly discharged through the second outlet of the first solenoid valve. This timely pressure relief of the extraction mechanism ensures the normal use and lifespan of components such as the brewing unit.

[0007] The objective of this utility model can also be achieved by the following technical measures: Specifically, it further includes a second solenoid valve and a steam valve. The second solenoid valve is provided with a second inlet and a third outlet. The multi-port is also provided with a third connection port and a fourth connection port that are connected to the first connection port. The steam valve is connected to the third connection port, and the second inlet port is connected to the fourth connection port. The steam valve is provided with a steam knob to control its opening and closing. The second solenoid valve is electrically connected to the control circuit board.

[0008] After steaming is complete, the second inlet and third outlet of the second solenoid valve can be connected via the control circuit board. At the same time, the heating device is stopped and the water pump is activated, so that the water in the tank flows into the heating device to cool down and finally flows out from the third outlet. This allows the heating device to cool down quickly to a temperature suitable for making hot coffee, which is beneficial for subsequent hot coffee making and improves the user experience.

[0009] Furthermore, a micro switch is also provided on the steam valve, and the micro switch is close to the steam knob. The micro switch is electrically connected to the control circuit board. This ensures that after steam generation is complete, the steam knob controls the microswitch while closing the steam valve. The microswitch then sends a signal to the control circuit board, which automatically controls the second solenoid valve, heating device, and water pump to perform their respective tasks. In other words, it automatically achieves rapid cooling of the heating device after steam generation, resulting in a good implementation effect.

[0010] Specifically, it further includes a water receiving box, with the second outlet and the third outlet respectively connected to the water receiving box; so that the water receiving box can hold the depressurized hot water from the extraction mechanism after making hot coffee and the water used to cool the heating device after steaming, which has a better implementation effect.

[0011] Furthermore, the second outlet is also connected to a one-way valve, one end of which is connected to the water collection box. The one-way valve can effectively prevent wastewater in the water collection box from flowing back into the brewing components, ensuring the normal operation of the product.

[0012] Specifically, the water receiving box is fixed to the front side wall of the base, and a water receiving cavity is provided inside the water receiving box. The upper opening of the water receiving cavity is connected to a top cover for holding a coffee cup. The top cover has several hollowed-out openings. The brewing component is located above the top cover. One end of the one-way valve and the third outlet are respectively connected to the water receiving cavity. This allows the top cover of the water receiving box to also serve as a coffee cup holder, while the water receiving cavity can also accommodate liquid that seeps out or leaks from the coffee cup and / or the brewing component. The implementation effect is good.

[0013] Specifically, the water tank is fixed to the rear end of the base, the water pump is close to the extraction mechanism, and the water pump and extraction mechanism are located between the water tank and the water receiving box; so that the water receiving box, water pump and extraction mechanism, and water tank are located in the front, middle and rear positions of the base, respectively. This arrangement is conducive to the compact overall structure of the coffee machine.

[0014] Specifically, the heating device is an instant boiler, which is equipped with a temperature sensor that is electrically connected to the control circuit board. The temperature sensor can effectively detect the real-time temperature of the instant boiler. Especially during the process of pumping water to cool the instant boiler, when the temperature sensor detects that the temperature inside the instant boiler has dropped to the temperature required to make hot coffee, the temperature sensor can send a signal to the control circuit board, which can then automatically control the working status of the second solenoid valve, the heating device, and the water pump.

[0015] The beneficial effects of this utility model are as follows: (1) This coffee machine has an improved structure. After hot coffee is made, the first inlet and the second outlet of the first solenoid valve can be connected through the control circuit board, so that the residual hot water in the extraction mechanism can be quickly discharged from the extraction mechanism through the second outlet of the first solenoid valve, thus realizing timely pressure relief of the extraction mechanism and ensuring the service life of the brewing components and other parts.

[0016] (2) After steaming is completed, the second inlet and the third outlet of the second solenoid valve can be connected by controlling the control circuit board. At the same time, the heating device is stopped and the water pump is working, so that the water in the water tank flows into the heating device to cool down and finally flows out from the third outlet, so that the heating device can be cooled down quickly to the temperature that can be used to make hot coffee, which is beneficial to the subsequent work of making hot coffee and improves the user experience.

[0017] (3) After steam is generated, the steam knob closes the steam valve and controls the micro switch at the same time, so that the micro switch sends a signal to the control circuit board, which facilitates the control circuit board to automatically control the second solenoid valve, heating device and water pump to perform related work. That is, it automatically realizes the rapid cooling of the heating device after steam generation, and its implementation effect is good. Attached Figure Description

[0018] Figure 1This is a schematic diagram of the improved structure of the coffee machine according to this utility model.

[0019] Figure 2 This is a schematic diagram of the water circuit principle of the improved structure of the coffee machine of this utility model.

[0020] Figure 3 This is a schematic diagram showing the connection between the water pump and the extraction mechanism of this utility model.

[0021] Figure 4 This is the electrical schematic diagram of the improved structure of the coffee machine according to this utility model. Detailed Implementation

[0022] The present patent will be further described below with reference to the accompanying drawings and embodiments: The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures, and should not be construed as limiting the present patent; In order to better illustrate the embodiments of the present patent, some parts in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] The terms "first," "second," etc., used in this patent do not indicate any order, quantity, or importance, but are merely for distinction. The terms "one," "a kind," etc., used in this patent do not indicate a limitation on quantity, but rather indicate the presence of at least one of the mentioned objects. The terms indicating direction or location used in this patent, such as "top," "bottom," "side," "longitudinal," "lateral," "middle," "center," "outer," "inner," "horizontal," "vertical," "left," "right," "above," "below," etc., reflect relative positions, not absolute positions; those skilled in the art can understand the specific meaning of these terms according to the specific circumstances.

[0024] Implementation examples, in conjunction with Figures 1 to 4 As shown, an improved coffee machine structure includes a base 1, on which a water tank 2, a water pump 3, an extraction mechanism, and a control circuit board 4 are provided. The extraction mechanism includes a heating device 5, a brewing component 6, and a multi-port connector 7. The multi-port connector 7 is provided with a first connecting port 71 and a second connecting port 72 that are connected to each other. The two ends of the water pump 3 are respectively connected to the water tank 2 and the water inlet 51 of the heating device 5, and the water outlet 52 of the heating device 5 is connected to the first connecting port 71. Its features include a first solenoid valve 8, which is provided with a first inlet 81, a first outlet 82 and a second outlet 83. The first inlet 81 is connected to a second connecting port 72 and the first outlet 82 is connected to the brewing component 6. When the first inlet 81 and the first outlet 82 of the first solenoid valve 8 are connected, the first inlet 81 and the second outlet 83 are in a closed state. The control circuit board 4 is electrically connected to the water pump 3, the heating device 5 and the first solenoid valve 8 respectively.

[0025] As a specific solution, it also includes a second solenoid valve 9 and a steam valve 10. The second solenoid valve 9 is provided with a second inlet 91 and a third outlet 92. The multi-port connector 7 is also provided with a third connecting port 73 and a fourth connecting port 74 that are connected to the first connecting port 71. The steam valve 10 is connected to the third connecting port 73, and the second inlet 91 is connected to the fourth connecting port 74. The steam valve 10 is provided with a steam knob 101 for controlling its opening and closing. The second solenoid valve 9 is electrically connected to the control circuit board 4. One end of the steam valve 10 is also connected to a steam pipe 102.

[0026] In this embodiment, a micro switch 20 is also provided on the steam valve 10, and the micro switch 20 is close to the steam knob 101. The micro switch 20 is electrically connected to the control circuit board 4.

[0027] As a more specific solution, it also includes a water receiving box 30, with the second outlet 83 and the third outlet 92 respectively connected to the water receiving box 30.

[0028] In this embodiment, the second outlet 83 is also connected to a one-way valve 40, one end of which is connected to the water receiving box 30; the one-way valve is a mechanical valve.

[0029] In this embodiment, the water receiving box 30 is fixed to the front side wall of the base 1. The water receiving box 30 is provided with a water receiving cavity 301. The upper opening of the water receiving cavity 301 is connected to a top cover 302 for holding a coffee cup. The top cover 302 has several hollow openings 303. The brewing component 6 is located above the top cover 302. One end of the one-way valve 40 and the third outlet 92 are respectively connected to the water receiving cavity 301.

[0030] In this embodiment, the water tank 2 is fixed on the rear end of the base 1, the water pump 3 is close to the extraction mechanism, and the water pump 3 and the extraction mechanism are located between the water tank 2 and the water receiving box 30; more specifically, the base 1 is also fixed with a mounting bracket 31, and the water pump 3 is fixed on the mounting bracket 31.

[0031] As a preferred embodiment, the heating device 5 is an instantaneous boiler, and a temperature sensor 50 is installed inside the instantaneous boiler. The temperature sensor 50 is electrically connected to the control circuit board 4.

[0032] Working principle: When making hot coffee, the first inlet 81 and the first outlet 82 of the first solenoid valve 8 are connected. The water pump 3 pumps water from the water tank 2 to the heating device 5 for heating. Then, the water flows through the multi-port connector 7 and the first inlet 81 and the first outlet 82 of the first solenoid valve 8 into the brewing assembly 6 for brewing and extraction.

[0033] After hot coffee is made, the first inlet 81 and the second outlet 83 of the first solenoid valve 8 can be connected by the control circuit board 4, so that the residual hot water in the extraction mechanism can quickly flow to the water collection box 30 through the second outlet 83 of the first solenoid valve 8.

[0034] When generating steam, the first solenoid valve 8 and the second solenoid valve 9 can be closed by controlling the control circuit board 4. At the same time, the heating power of the heating device 5 is increased so that the water flowing into the heating device 5 is heated into steam. The steam knob 101 is operated to make the internal connection of the steam valve 10 open, and the steam can be discharged through the multi-port connector 7, the steam valve 10 and the steam pipe 102 in sequence.

[0035] After steaming is complete, operate the steam knob 101. The steam knob 101 closes the steam valve 10 and simultaneously controls the micro switch 20, causing the micro switch 20 to send a signal to the control circuit board 4. The control circuit board 4 controls the second inlet 91 and the third outlet 92 of the second solenoid valve 9 to connect, and at the same time controls the heating device 5 to stop heating and the water pump 3 to work. This causes the water in the water tank 2 to flow into the heating device 5 to absorb heat and cool down, and finally flow from the third outlet 92 to the water collection box 30. When the temperature sensor 50 detects that the temperature inside the heating device 5 has dropped to the temperature for making hot coffee, the temperature sensor 50 sends a signal to the control circuit board 4. The control circuit board 4 automatically controls the second solenoid valve 9 and the water pump 3 to close, completing the automatic cooling operation of the heating device 5, so that the work of making hot coffee can continue.

[0036] The embodiments described above are merely examples for clearly illustrating this patent, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this patent, and these all fall within the scope of protection of this patent. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An improved structure for a coffee machine, comprising a base (1), wherein a water tank (2), a water pump (3), an extraction mechanism and a control circuit board (4) are provided on the base (1), the extraction mechanism comprising a heating device (5), a brewing assembly (6) and a multi-port connector (7), wherein the multi-port connector (7) is provided with a first connecting port (71) and a second connecting port (72) connected together, the two ends of the water pump (3) are respectively connected to the water tank (2) and the water inlet (51) of the heating device (5), and the water outlet (52) of the heating device (5) is connected to the first connecting port (71); Its characteristics are, It also includes a first solenoid valve (8), which is provided with a first inlet (81), a first outlet (82) and a second outlet (83). The first inlet (81) is connected to the second connecting port (72), and the first outlet (82) is connected to the brewing assembly (6). When the first inlet (81) and the first outlet (82) of the first solenoid valve (8) are connected, the first inlet (81) and the second outlet (83) are in a closed state. The control circuit board (4) is electrically connected to the water pump (3), the heating device (5) and the first solenoid valve (8) respectively.

2. The improved coffee machine structure according to claim 1, characterized in that, It also includes a second solenoid valve (9) and a steam valve (10). The second solenoid valve (9) is provided with a second inlet (91) and a third outlet (92). The multi-port connector (7) is also provided with a third connection port (73) and a fourth connection port (74) that are connected to the first connection port (71). The steam valve (10) is connected to the third connection port (73), and the second inlet (91) is connected to the fourth connection port (74). The steam valve (10) is provided with a steam knob (101) for controlling its switch. The second solenoid valve (9) is electrically connected to the control circuit board (4).

3. The improved coffee machine structure according to claim 2, characterized in that, A micro switch (20) is also provided on the steam valve (10), and the micro switch (20) is close to the steam knob (101). The micro switch (20) is electrically connected to the control circuit board (4).

4. The improved coffee machine structure according to claim 2, characterized in that, It also includes a water receiving box (30), and the second outlet (83) and the third outlet (92) are respectively connected to the water receiving box (30).

5. The improved coffee machine structure according to claim 4, characterized in that, The second outlet (83) is also connected to a one-way valve (40), one end of which is connected to the water receiving box (30).

6. The improved coffee machine structure according to claim 5, characterized in that, The water receiving box (30) is fixed to the front side wall of the base (1). A water receiving cavity (301) is provided inside the water receiving box (30). A cover (302) for holding a coffee cup is connected to the upper opening of the water receiving cavity (301). Several hollow holes (303) are opened on the cover (302). The brewing component (6) is located above the cover (302). One end of the one-way valve (40) and the third outlet (92) are respectively connected to the water receiving cavity (301).

7. The improved coffee machine structure according to claim 6, characterized in that, The water tank (2) is fixed on the rear end of the base (1), the water pump (3) is close to the extraction mechanism, and the water pump (3) and the extraction mechanism are located between the water tank (2) and the water receiving box (30).

8. The improved coffee machine structure according to claim 3, characterized in that, The heating device (5) is an instantaneous boiler, and a temperature sensor (50) is installed inside the instantaneous boiler. The temperature sensor (50) is electrically connected to the control circuit board (4).

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