Variable-pressure coffee machine waterway system and coffee machine

Abstract

The utility model 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 discharged to the waste water disc before extraction, then pre-soaking or extraction is carried out, 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] This utility model relates to the field of coffee machine equipment, specifically a variable pressure coffee machine water circuit system and coffee machine. Background Technology

[0002] With the development of coffee culture and technological advancements, coffee machine prices have gradually decreased, and pressure coffee machines have become a common household appliance. The upper limit of coffee extraction pressure is determined by the pressure relief threshold of the pressure valve. Generally, the pressure relief threshold of the pressure valve is a single, fixed pressure value, set at the factory and cannot be adjusted later. Most pressure coffee machines on the market adjust extraction pressure by adding a throttle valve before the pressure gauge to pressurize the upstream water circuit. This pressure is 100% released into the coffee grounds at the extraction head. The actual obstruction of water flow is between the coffee puck and the filter in the extraction device. Only the pressure generated here is the true pressure for extracting the coffee puck. Only when water flows into the extraction device can a stable extraction pressure be formed in the delivery pipeline. Furthermore, adding a throttle valve has a significant negative impact on the lifespan of the water pump and flow control. Therefore, this invention proposes a variable pressure coffee machine water circuit system, effectively solving the problems of traditional pressure coffee machines. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides a variable pressure coffee machine water system and coffee machine. By incorporating a temperature and pressure sensor, a hot water flow meter, and a solenoid valve at the extraction head, cold water in the pipeline can be effectively drained to the wastewater tray before pre-soaking or extraction. Furthermore, the temperature and pressure sensor and hot water flow meter at the extraction head provide real-time feedback on the extraction status, and the extraction pressure, temperature, and flow rate are adjusted by controlling the water pump and heating element via PID control. This ensures precise and stable coffee liquid weight and temperature for each extraction.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a variable pressure coffee machine water circuit system and coffee machine, including a water tank, a flow meter, a first three-way connector, a vibration pump, a second three-way connector, an OPV valve, a heating element, a control device, a hot water flow meter, a temperature and pressure sensor, a solenoid valve, an extraction head, a high-pressure funnel, a coffee cup, and a wastewater tray. The bottom of the water tank has a water tank outlet, and the flow meter has a flow meter outlet and a flow meter inlet. The first three-way connector includes a first three-way connector first end, a first three-way connector second end, and a first three-way connector third end. The vibration pump includes a vibration pump inlet end and a vibration pump outlet end. The second three-way connector includes a second three-way connector first end, a second three-way connector second end, and a second three-way connector third end. The OPV valve includes an OPV valve inlet end and an OPV valve outlet end. The valve outlet includes a heating block with a heating block inlet and a heating block outlet, a hot water flow meter with a hot water flow meter inlet and a hot water flow meter outlet, a temperature and pressure sensor with a temperature and pressure sensor connection and a temperature and pressure sensor output, and a solenoid valve with a solenoid valve first connection, a solenoid valve second connection, and a solenoid valve third connection.

[0005] Preferably, the water tank is connected to the flow meter inlet of the flow meter through the water tank outlet, the flow meter outlet is connected to the first end of the first tee connector, and the third end of the first tee connector is connected to the vibration pump inlet of the vibration pump.

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

[0007] Preferably, the heating element inlet is connected to the hot water flow meter inlet, and the hot water flow meter outlet is connected to the temperature and pressure sensor connection terminal. Preferably, the temperature and pressure sensor output terminal is connected to the solenoid valve's first connection terminal, the solenoid valve's second connection terminal is connected to the extraction head, and the solenoid valve's third connection terminal is the output terminal connected to the wastewater tray.

[0008] Preferably, a high-pressure funnel is screwed and rotatably mounted 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.

[0009] Preferably, the control device controls the vibration pump, heating block, hot water flow meter, temperature and pressure sensor and solenoid valve via electrical connection.

[0010] Preferably, the temperature and pressure sensor is an integrated temperature and pressure sensor, and the hot water flow meter has a straight-through pipe inside, which has a simple structure and will not leave residual water inside.

[0011] This utility model has the following beneficial effects:

[0012] 1. The present invention proposes an improved plastic container, which, by equipping the extraction head with a temperature and pressure sensor, a hot water flow meter and a solenoid valve, can effectively drain the cold water in the pipeline to the wastewater pan before pre-soaking or extraction.

[0013] 2. This utility model proposes an improved plastic container equipped with a temperature and pressure sensor and a hot water flow meter at the extraction head. This allows for real-time feedback of the extraction status, and the extraction pressure, temperature, and flow rate are adjusted by controlling the water pump and heating element via PID control. This ensures precise and stable weight and temperature of the extracted coffee liquid in each extraction. Attached Figure Description

[0014] Figure 1 is a system structure diagram of the variable pressure coffee machine water circuit system proposed in this utility model.

[0015] Legend:

[0016] 101. Water tank; 102. Flow meter; 103. First tee connector; 104. Vibration pump; 105. Second tee connector; 106. OPV valve; 107. Heating element; 108. Control equipment; 109. Hot water flow meter;

[0017] 110. Temperature and pressure sensor; 111. Solenoid valve; 112. Extraction head; 113. High-pressure funnel; 114. Coffee cup; 115. Wastewater tray; 201. Flow meter outlet; 202. Flow meter inlet; 301. First end of the first tee connector; 302. Second end of the first tee connector; 303. Third end of the first tee connector; 401. Vibration pump inlet; 402. Vibration pump outlet; 501. First end of the second tee connector; 502. Second end of the second tee connector; 503. Third end of the second tee connector; 601. OPV valve inlet; 602. OPV valve outlet; 701. Heating block inlet; 702. Heating block outlet; 901. Hot water flow meter inlet;

[0018] 902. Hot water flow meter outlet; 1011. Water tank outlet; 1101. Temperature and pressure sensor connection terminal; 1102. Temperature and pressure sensor output terminal; 1111. Solenoid valve first connection terminal; 1112. Solenoid valve second connection terminal; 1113. Solenoid valve third connection terminal. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Referring to Figure 1, a specific embodiment of this utility model is provided: This utility model embodiment provides a variable pressure coffee machine water circuit system and coffee machine, including 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 wastewater 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 connector 103 includes a first three-way connector first end 301, a first three-way connector second end 302, and a first three-way connector third end 303. The vibration pump 104... The system includes a vibration pump inlet 401 and a vibration pump outlet 402; a second three-way connector 105 including a second three-way connector first end 501, a second three-way connector second end 502, and a second three-way connector third end 503; an OPV valve 106 including an OPV valve inlet 601 and an OPV valve outlet 602; a heating block 107 including a heating block inlet 701 and a heating block outlet 702; a hot water flow meter 109 including a hot water flow meter inlet 901 and a hot water flow meter outlet 902; a temperature and pressure sensor 110 including a temperature and pressure sensor connection end 1101 and a temperature and pressure sensor output end 1102; and a solenoid valve 111 including a solenoid valve first connection end 1111, a solenoid valve second connection end 1112, and a solenoid valve third connection end 1113.Water tank 101 is connected to flow meter inlet 202 of flow meter 102 via water tank outlet 1011. Flow meter outlet 201 of flow meter 102 is connected to the first end 301 of the first three-way connector 103. The third end 303 of the first three-way connector 103 is connected to the vibration pump inlet 401 of vibration pump 104. The second end 302 of the first three-way connector 103 is sealed to the OPV valve inlet 601 of OPV valve 106. Vibration pump outlet 402 of vibration pump 104 is connected to the first end 501 of the second three-way connector 105. The third end 503 of the second three-way connector 105 is connected to the OPV valve outlet 602 of OPV valve 106. The second end 502 of the second three-way connector 105 is connected to the second end 502 of the second three-way connector 105. The heating element is connected to the heating element inlet 701 of the heating element 107. The heating element inlet 701 of the heating element 107 is connected to the hot water flow meter inlet 901 of the hot water flow meter 109. The hot water flow meter outlet 902 of the hot water flow meter 109 is connected to the temperature and pressure sensor connection 1101 of the temperature and pressure sensor 110. The temperature and pressure sensor output 1102 of the temperature and pressure sensor 110 is connected to the first solenoid valve connection 1111 of the solenoid valve 111. The second solenoid valve connection 1112 of the solenoid valve 111 is connected to the extraction head 112. The third solenoid valve connection 1113 of the solenoid valve 111 is the output end and is connected to the wastewater tray 115. A high-pressure funnel 113 is screwed and rotated at the bottom of the extraction head 112. The bottom of the high-pressure funnel 113 is a coffee outlet for placing a coffee cup 114 to receive coffee. Working principle: Assuming the user has already made coffee once, some water will remain in the pipe 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 water will drop.When the user operates the coffee machine again for coffee extraction, the control device first issues a command. The heating element begins preheating, the water pump starts working in a pulsed manner, and the solenoid valve activates, opening one end and allowing water to drain into the wastewater tray. Simultaneously, the flow meter and hot water flow meter work to count and compare values, while 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 a command to stop wastewater discharge and begin pre-soaking. At this point, the solenoid valve activates, opening one end and allowing hot water to enter the extraction head for extraction. The temperature and pressure sensor then reads the pressure generated inside the extraction head and feeds it back to the control system. If the extraction pressure is higher than the user-set value, the control device reduces the extraction pressure by adjusting the water pump's operating frequency; conversely, it increases the pump's operating frequency to increase the extraction pressure. If the temperature inside the extraction head is lower than the set value, the temperature and pressure sensor feeds the temperature data back to the control system, which then increases the heating power of the heating element to ensure the output hot water temperature. Similarly, if the temperature is higher than the set value, the control device, upon receiving feedback, will control the heating element to cool down. Meanwhile, the hot water flow meter controls the flow rate of the 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 sends feedback signals to the control equipment through the hot water flow meter and temperature and pressure sensor. The control equipment adjusts the entire extraction process to achieve stable temperature and pressure, ensuring consistency in each extraction.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A variable pressure coffee machine water circuit system, comprising a water tank (101), a flow meter (102), a first tee connector (103), a vibration pump (104), a second tee connector (105), an OPV valve (106), a heating element (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 wastewater tray (115), characterized in that: The water tank (101) has a water tank outlet (1011) at its bottom. The flow meter (102) has a flow meter outlet (201) and a flow meter inlet (202). The first tee connector (103) includes a first tee connector first end (301), a first tee connector second end (302), and a first tee connector third end (303). The vibration pump (104) includes a vibration pump inlet end (401) and a vibration pump outlet end (402). The second tee connector (105) includes a second tee connector first end (501), a second tee connector second end (502), and a second tee connector third end (503). The OPV valve (106) includes an OPV valve inlet end (601) and an OPV valve outlet end (602). The valve outlet (602), the heating block (107) includes a heating block inlet (701) and a heating block outlet (702), the hot water flow meter (109) includes a hot water flow meter inlet (901) and a hot water flow meter 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). The heating element (107) has its inlet (701) connected to the hot water flow meter inlet (901) of the hot water flow meter (109). The hot water flow meter outlet (902) of the hot water flow meter (109) is connected to the temperature and pressure sensor connection (1101) of the temperature and pressure sensor (110). The temperature and pressure sensor output (1102) of the temperature and pressure sensor (110) is connected to the first connection (1111) of the solenoid valve (111). The second connection (1112) of the solenoid valve (111) is connected to the extraction head (112). The third connection (1113) of the solenoid valve (111) is the output end and is connected to the wastewater pan (115).

2. The variable pressure coffee machine water circuit system according to claim 1, characterized in that: The water tank (101) is connected to the flow meter inlet (202) of the flow meter (102) through the water tank outlet (1011). The flow meter outlet (201) of the flow meter (102) is connected to the first end (301) of the first tee connector (103). The third end (303) of the first tee connector (103) is connected to the vibrating pump inlet (401) of the vibrating pump (104).

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

4. The variable pressure coffee machine water circuit system according to claim 1, characterized in that: The bottom of the extraction head (112) is provided with a threaded rotating high-pressure funnel (113), and the bottom of the high-pressure funnel (113) is a coffee outlet for placing a coffee cup (114) to receive the coffee.

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

6. The water circuit system for a variable pressure coffee machine 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 pipe inside, which is simple in structure and will not leave residual water inside.

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