Variable-pressure coffee machine waterway system and coffee machine

Abstract

The invention provides a variable-pressure coffee machine waterway system and a coffee machine, and relates to the field of coffee machine equipment. The variable-pressure coffee machine waterway system comprises a water cabinet, a flow meter, a first three-way connector, a vibration pump, a second three-way connector, an OPV valve, a heating block, a control device, a hot water flow meter, a temperature and pressure sensor, an electromagnetic valve, an extraction head, a high-pressure funnel, a coffee cup and a waste water disc. The temperature and pressure sensor, the hot water flow meter and the electromagnetic valve are arranged at the extraction head, cold water in a pipeline can be effectively drained to the waste water disc before extraction, then pre-soaking or extraction is conducted, the temperature and pressure sensor and the hot water flow meter are arranged at the extraction head, the extraction state can be fed back in real time, the water pump is controlled through PID, and the extraction efficiency is improved. The extraction pressure, temperature and flow are adjusted according to the working state of the heating block. The weight and the temperature of coffee liquid extracted each time are accurate and stable.

Description

Technical Field

[0001] The present invention relates to the field of coffee machine equipment, in particular to a variable pressure coffee machine water channel system and a coffee machine. Background Art

[0002] With the development of coffee culture and technological progress, the price of coffee machines has gradually decreased. Pressure coffee machines have become a common household appliance, in which the upper limit of coffee extraction pressure is determined by the pressure relief valve value of the pressure valve. Generally, the pressure relief valve value of the pressure valve is a single fixed pressure value, which is set when the product leaves the factory and cannot be adjusted later. The way to adjust the extraction pressure of pressure coffee machines on the market is to increase the pressure of the front-end water circuit by adding a throttle valve in front of the pressure gauge. This section of pressure is 100% released into the coffee powder at the extraction head. The actual location where water forms an obstacle is the coffee powder cake and the filter in the extraction device. Only the pressure generated here is the real pressure for extracting the coffee powder cake. Only when the water flows to the extraction device can a stable extraction pressure be formed on the delivery pipeline. Adding a throttle valve will have a greater adverse effect on the life of the water pump, flow control, etc. Therefore, the present invention proposes a variable pressure coffee machine water circuit system, thereby effectively solving the above-mentioned problems of traditional pressure coffee machines. Summary of the invention

[0003] 1. Technical issues to be resolved In view of the deficiencies of the prior art, the present invention provides a variable pressure coffee machine water system and a coffee machine, which can effectively drain the cold water in the pipeline to the waste water tray before extraction by arranging a temperature and pressure sensor, a hot water flow meter and a solenoid valve at the extraction head, and can provide real-time feedback on the extraction status, and adjust the extraction pressure, temperature and flow rate by PID control of the water pump and the working status of the heating block, so as to ensure that the weight and temperature of the coffee liquid extracted each time are accurate and stable.

[0004] (II) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a variable pressure coffee machine water system and a coffee machine, including a water tank, a flow meter, a first three-way joint, a vibration pump, a second three-way joint, an OPV valve, a heating block, a control device, a hot water flow meter, a temperature and pressure sensor, an electromagnetic valve, an extraction head, a high-pressure funnel, a coffee cup and a waste water tray, the bottom of the water tank is provided with a water tank outlet, the flow meter is provided with a flow meter outlet and a flow meter inlet, the first three-way joint includes a first end of the first three-way joint, a second end of the first three-way joint and a third end of the first three-way joint, the vibration pump includes a first end of the first three-way joint, a second end of the first three-way joint and a third end of the first three-way joint, and the vibration pump includes a first end of the first three-way joint, a second end of the first three-way joint and a third end of the first three-way joint. The dynamic pump includes a vibration pump water inlet end and a vibration pump water outlet end, the second three-way joint includes a second three-way joint first end and a second three-way joint second end and a second three-way joint third end, the OPV valve includes an OPV valve inlet end and an OPV valve outlet end, the heating block includes a heating block water inlet end and a heating block water outlet end, the hot water flow meter includes a hot water flow meter water inlet end and a hot water flow meter water outlet end, the temperature and pressure sensor includes a temperature and pressure sensor connection end and a temperature and pressure sensor output end, and the solenoid valve includes a solenoid valve first connection end, a solenoid valve second connection end and a solenoid valve third connection end.

[0005] Preferably, the water tank is connected to the flowmeter water inlet of the flowmeter through the water tank outlet, the flowmeter water outlet of the flowmeter is connected to the first end of the first three-way joint of the first three-way joint, and the third end of the first three-way joint of the first three-way joint is connected to the vibration pump water inlet end of the vibration pump.

[0006] Preferably, the second end of the first three-way joint of the first three-way joint is sealed and connected to the OPV valve inlet end of the OPV valve, the vibration pump water outlet end of the vibration pump is connected to the first end of the second three-way joint of the second three-way joint, the third end of the second three-way joint of the second three-way joint is connected to the OPV valve outlet end of the OPV valve, and the second end of the second three-way joint of the second three-way joint is connected to the heating block water inlet end of the heating block.

[0007] Preferably, the heating block water inlet end of the heating block is connected to the hot water flow meter water inlet end of the hot water flow meter, and the hot water flow meter water outlet end of the hot water flow meter is connected to the temperature and pressure sensor connection end of the temperature and pressure sensor.

[0008] Preferably, the temperature and pressure sensor output end of the temperature and pressure sensor is connected to the first connection end of the solenoid valve, the second connection end of the solenoid valve is connected to the extraction head, and the third connection end of the solenoid valve is the output end connected to the waste water tray.

[0009] Preferably, a high-pressure funnel is rotatably mounted on a thread at the bottom of the extraction head, and the bottom of the high-pressure funnel is a coffee outlet for placing a coffee cup to receive the coffee.

[0010] Preferably, the control device controls the vibration pump, the heating block, the hot water flow meter, the temperature and pressure sensor and the solenoid valve through electrical connection.

[0011] Preferably, the temperature and pressure sensor is an integrated temperature and pressure sensor, and the interior of the hot water flow meter is a straight-through pipeline with a simple structure and no residual water inside.

[0012] (III) Beneficial effects The present invention provides a variable pressure coffee machine water system and a coffee machine, which have the following beneficial effects: 1. The present invention provides a variable pressure coffee machine water system and a coffee machine. By arranging a temperature and pressure sensor, a hot water flow meter and a solenoid valve at the extraction head, the cold water in the pipeline can be effectively discharged to the waste water tray before pre-immersion or extraction.

[0013] 2. The present invention provides a variable pressure coffee machine water system and a coffee machine, which is equipped with a temperature and pressure sensor and a hot water flow meter at the extraction head, which can feedback the extraction status in real time, and adjust the extraction pressure, temperature and flow through PID control of the water pump and the working status of the heating block, so as to ensure that the weight and temperature of the coffee liquid extracted each time are accurate and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a system structure diagram of the variable pressure coffee machine water system of the present invention.

[0015] Among them, 101, water tank; 102, flow meter; 103, first three-way joint; 104, vibration pump; 105, second three-way joint; 106, OPV valve; 107, heating block; 108, control equipment; 109, hot water flow meter; 110, temperature and pressure sensor; 111, solenoid valve; 112, extraction head; 113, high-pressure funnel; 114, coffee cup; 115, waste water tray; 201, flow meter outlet; 202, flow meter inlet; 301, first end of first three-way joint; 302, second end of first three-way joint; 303, third end of first three-way joint; 401, vibration pump inlet Water end; 402, water outlet end of vibration pump; 501, first end of second three-way joint; 502, second end of second three-way joint; 503, third end of second three-way joint; 601, inlet end of OPV valve; 602, outlet end of OPV valve; 701, water inlet end of heating block; 702, water outlet end of heating block; 901, water inlet end of hot water flow meter; 902, water outlet end of hot water flow meter; 1011, water tank outlet; 1101, connection end of temperature and pressure sensor; 1102, output end of temperature and pressure sensor; 1111, first connection end of solenoid valve; 1112, second connection end of solenoid valve; 1113, third connection end of solenoid valve. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. In the description of this application, it should be noted that the terms used here are only for describing specific implementations, and are not intended to limit the exemplary implementations according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and devices known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and devices should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0017] Embodiment 1: like Figure 1 As shown, the embodiment of the present invention provides a variable pressure coffee machine water system and a coffee machine, including a water tank 101, a flow meter 102, a first three-way joint 103, a vibration pump 104, a second three-way joint 105, an OPV valve 106, a heating block 107, a control device 108, a hot water flow meter 109, a temperature and pressure sensor 110, a solenoid valve 111, an extraction head 112, a high pressure funnel 113, a coffee cup 114 and a waste water tray 115. The bottom of the water tank 101 is provided with a water tank outlet 1011, the flow meter 102 is provided with a flow meter outlet 201 and a flow meter inlet 202, the first three-way joint 103 includes a first three-way joint first end 301, a first three-way joint second end 302 and a first three-way joint third end 303, and the vibration pump 104 It includes a vibration pump water inlet end 401 and a vibration pump water outlet end 402, the second three-way joint 105 includes a second three-way joint first end 501 and a second three-way joint second end 502 and a second three-way joint third end 503, the OPV valve 106 includes an OPV valve inlet end 601 and an OPV valve outlet end 602, the heating block 107 includes a heating block water inlet end 701 and a heating block water outlet end 702, the hot water flow meter 109 includes a hot water flow meter water inlet end 901 and a hot water flow meter water outlet end 902, the temperature and pressure sensor 110 includes a temperature and pressure sensor connection end 1101 and a temperature and pressure sensor output end 1102, and the solenoid valve 111 includes a solenoid valve first connection end 1111, a solenoid valve second connection end 1112 and a solenoid valve third connection end 1113.

[0018] The water tank 101 is connected to the flow meter water inlet 202 of the flow meter 102 through the water tank water outlet 1011, the flow meter water outlet 201 of the flow meter 102 is connected to the first three-way joint first end 301 of the first three-way joint 103, the first three-way joint third end 303 of the first three-way joint 103 is connected to the vibration pump water inlet end 401 of the vibration pump 104, the first three-way joint second end 302 of the first three-way joint 103 is sealed and connected to the OPV valve inlet end 601 of the OPV valve 106, the vibration pump water outlet end 402 of the vibration pump 104 is connected to the second three-way joint first end 501 of the second three-way joint 105, the second three-way joint third end 503 of the second three-way joint 105 is connected to the OPV valve outlet end 602 of the OPV valve 106, and the second three-way joint second end of the second three-way joint 105 is connected to the OPV valve outlet end 602 of the OPV valve 106. 502 is connected to the heating block water inlet end 701 of the heating block 107, the heating block water inlet end 701 of the heating block 107 is connected to the hot water flow meter water inlet end 901 of the hot water flow meter 109, the hot water flow meter water outlet end 902 of the hot water flow meter 109 is connected to the temperature and pressure sensor connection end 1101 of the temperature and pressure sensor 110, the temperature and pressure sensor output end 1102 of the temperature and pressure sensor 110 is connected to the solenoid valve first connection end 1111 of the solenoid valve 111, the solenoid valve second connection end 1112 of the solenoid valve 111 is connected to the extraction head 112, the solenoid valve third connection end 1113 of the solenoid valve 111 is the output end connected to the waste water tray 115, and a high-pressure funnel 113 is provided at the bottom of the extraction head 112 with a threaded rotatable installation, and the bottom of the high-pressure funnel 113 is a coffee outlet for placing a coffee cup 114 to receive coffee.

[0019] Embodiment 2: like Figure 1As shown, assuming that the user has made coffee once, some water will remain in the pipeline between the water outlet of the heating block and the extraction head. If the user does not operate for a long time, the temperature of this part of water will decrease. If the user operates the coffee machine again to extract coffee, the control device will first issue an instruction. At this time, the heating block starts to preheat, and the water pump starts to work in a pulsed manner. The solenoid valve works so that one end of the solenoid valve is connected to the water in the pipeline, and the water in the pipeline is discharged into the waste water tray. At the same time, the flow meter and the hot water flow meter work simultaneously to count and compare. The temperature and pressure sensor reads the temperature of the discharged water in real time. When the temperature reaches the set value, the control device issues an instruction to stop discharging waste water and start pre-soaking. At this time, the solenoid valve acts so that one end of the solenoid valve is connected to the water, and hot water enters the extraction head through one end of the solenoid valve to extract. At this time, the temperature and pressure sensor starts to work to read the pressure generated in the extraction head and feeds back to the control system. If the extraction pressure is greater than the user's set value at this time, the control device reduces the extraction pressure by controlling the working frequency of the water pump. Otherwise, it speeds up the working frequency of the water pump to increase the extraction pressure. If the temperature in the extraction head is lower than the set value at this time, the temperature and pressure sensor will feed back the temperature data to the control system. The control device controls the heating block to increase its heating power to ensure the output hot water temperature. Similarly, if the temperature is higher than the set value, the control device will control the heating block to cool down when receiving feedback. At the same time, the hot water flow meter will measure the flow of hot water injected into the extraction head. When the injected water flow reaches the set value, the entire extraction is completed, the water pump stops working, the solenoid valve closes the channel, and the entire water system passes through the hot water flow meter. The temperature and pressure sensor feedback signals to the control device, and the control device adjusts the entire extraction process to achieve stable temperature and pressure to ensure the consistency of each extraction.

[0020] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A variable pressure coffee machine water system, comprising a water tank (101), a flow meter (102), a first three-way connector (103), a vibration pump (104), a second three-way connector (105), an OPV valve (106), a heating block (107), a control device (108), a hot water flow meter (109), a temperature and pressure sensor (110), a solenoid valve (111), an extraction head (112), a high pressure funnel (113), a coffee cup (114) and a waste water tray (115), characterized in that: The bottom of the water tank (101) is provided with a water tank outlet (1011); the flow meter (102) is provided with a flow meter outlet (201) and a flow meter inlet (202); the first three-way joint (103) comprises a first three-way joint first end (301), a first three-way joint second end (302), and a first three-way joint third end (303); the vibration pump (104) comprises a vibration pump water inlet end (401) and a vibration pump water outlet end (402); the second three-way joint (105) comprises a second three-way joint first end (501), a second three-way joint second end (502), and a second three-way joint third end (503) The OPV valve (106) includes an OPV valve inlet (601) and an OPV valve outlet (602); the heating block (107) includes a heating block water inlet (701) and a heating block water outlet (702); the hot water flow meter (109) includes a hot water flow meter water inlet (901) and a hot water flow meter water outlet (902); the temperature and pressure sensor (110) includes a temperature and pressure sensor connection end (1101) and a temperature and pressure sensor output end (1102); and the solenoid valve (111) includes a solenoid valve first connection end (1111), a solenoid valve second connection end (1112), and a solenoid valve third connection end (1113).

2. The variable pressure coffee machine water system according to claim 1, characterized in that: The water tank (101) is connected to a flow meter water inlet (202) of a flow meter (102) via a water tank water outlet (1011); the flow meter water outlet (201) of the flow meter (102) is connected to a first three-way joint first end (301) of a first three-way joint (103); and the first three-way joint third end (303) of the first three-way joint (103) is connected to a vibration pump water inlet end (401) of a vibration pump (104).

3. The variable pressure coffee machine water system according to claim 1, characterized in that: The second end (302) of the first three-way joint (103) is sealedly connected to the OPV valve inlet end (601) of the OPV valve (106); the vibration pump water outlet end (402) of the vibration pump (104) is connected to the first end (501) of the second three-way joint (105); the third end (503) of the second three-way joint (105) is connected to the OPV valve outlet end (602) of the OPV valve (106); and the second end (502) of the second three-way joint (105) is connected to the heating block water inlet end (701) of the heating block (107).

4. The variable pressure coffee machine water system according to claim 1, characterized in that: The heating block water inlet end (701) of the heating block (107) is connected to the hot water flow meter water inlet end (901) of the hot water flow meter (109), and the hot water flow meter water outlet end (902) of the hot water flow meter (109) is connected to the temperature and pressure sensor connection end (1101) of the temperature and pressure sensor (110).

5. The variable pressure coffee machine water system according to claim 1, characterized in that: The temperature and pressure sensor output end (1102) of the temperature and pressure sensor (110) is connected to the first solenoid valve connection end (1111) of the solenoid valve (111), the second solenoid valve connection end (1112) of the solenoid valve (111) is connected to the extraction head (112), and the third solenoid valve connection end (1113) of the solenoid valve (111) is an output end connected to the waste water tray (115).

6. The variable pressure coffee machine water system according to claim 1, characterized in that: A high-pressure funnel (113) is rotatably mounted on the bottom of the extraction head (112) via a thread, and the bottom of the high-pressure funnel (113) is a coffee outlet for placing a coffee cup (114) to receive coffee.

7. The variable pressure coffee machine water system according to claim 1, characterized in that: The control device (108) controls the vibration pump (104), the heating block (107), the hot water flow meter (109), the temperature and pressure sensor (110), and the solenoid valve (111) through electrical connection.

8. The variable pressure coffee machine water system according to claim 1, characterized in that: The temperature and pressure sensor (110) is an integrated temperature and pressure sensor, and the hot water flow meter (109) has a straight-through pipeline inside, which has a simple structure and does not leave any residual water inside.

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