Pressure-adjustable extraction water path structure and coffee machine thereof

Abstract

The utility model discloses a kind of adjustable pressure extraction waterway structure and coffee machine, including water tank, electromagnetic pump, heating block and extraction head connected in sequence;Flowmeter is equipped between the water tank and electromagnetic pump, electromagnetic valve is equipped between the heating block and extraction head;Flowmeter and electromagnetic pump between, heating block and electromagnetic valve between are connected respectively by three-way pipe fitting;Two three-way pipe fittings are equipped with pressure regulating valve and are connected between;Pressure sensor is equipped on the extraction head, for reading the pressure signal of extraction head;Further include control panel, the control panel is electrically connected with electromagnetic pump, heating block, flowmeter, electromagnetic valve respectively, and pressure sensor, pressure regulating valve;The control panel according to the pressure high or low expressed by pressure signal, corresponding control the opening of pressure regulating valve increases or decreases.

Description

Technical Field

[0001] This utility model belongs to the field of coffee machine technology, specifically relating to an adjustable pressure extraction water circuit structure and its coffee machine. Background Technology

[0002] Coffee extraction is a process that uses physical means to dissolve soluble substances from coffee beans into water. The essence of coffee extraction is solid-liquid extraction (also known as leaching), which uses water as a solvent to dissolve soluble substances (such as caffeine, acids, sugars, lipids, melanoidins, etc.) in coffee powder to form coffee liquid.

[0003] Water pressure during coffee extraction has a significant impact on extraction efficiency and flavor balance. Appropriate water pressure can prevent over-extraction and also requires water molecules to penetrate deeper into the coffee grounds, causing cell walls to break down more thoroughly and releasing more soluble substances. At the same time, it can also inhibit the dissolution of large molecules such as lignin and polyphenols, preventing the coffee from developing a smoky or astringent taste.

[0004] The water pressure in most existing coffee extraction systems is not adjustable; it is usually controlled by adjusting the pump output. This results in a lag in the pressure in the pipeline, which affects the extraction effect and taste during the coffee extraction process. Summary of the Invention

[0005] In response to the problems in related technologies, this utility model proposes a pressure-adjustable extraction water circuit structure and its coffee machine, which achieves pressure regulation during coffee extraction by setting a pressure regulating valve and a control board.

[0006] This utility model is implemented as follows:

[0007] An adjustable pressure extraction water circuit structure is installed inside a coffee machine, including a water tank, an electromagnetic pump, a heating block, and an extraction head connected in sequence;

[0008] A flow meter is installed between the water tank and the electromagnetic pump, and an electromagnetic valve is installed between the heating block and the extraction head; the flow meter and the electromagnetic pump, and the heating block and the electromagnetic valve are respectively connected by a three-way pipe fitting; a pressure regulating valve is connected between the two three-way pipe fittings; a pressure sensor is installed on the extraction head to read the pressure signal of the extraction head;

[0009] It also includes a control board, which is electrically connected to the electromagnetic pump, heating block, flow meter, solenoid valve, pressure sensor, and pressure regulating valve respectively; the control board controls the opening degree of the pressure regulating valve to increase or decrease according to the pressure signal indicating high or low pressure.

[0010] After the electromagnetic pump starts, it draws water out of the water tank and opens the solenoid valve, which then heats the water. The water in the tank enters the electromagnetic pump through the flow meter, and the electromagnetic pump draws the water to the heating block for heating. The water then passes through the solenoid valve into the extraction head, where it is extracted by pressure. The control panel controls the pressure regulating valve to change the water pressure in the extraction water circuit.

[0011] The pressure sensor is used to read the pressure and provide a feedback signal; the control board activates the pressure regulating valve to regulate the pressure based on the feedback signal.

[0012] Preferably, the output end of the electromagnetic pump is also connected to a wastewater box.

[0013] Specifically, the wastewater box is used to collect the generated wastewater.

[0014] Preferably, the pressure regulating valve includes a valve stem, a drive structure disposed at both ends of the valve stem, and a valve body. One end of the valve stem extends into the drive structure and engages with it. The other end of the valve stem engages with the valve body and extends into the valve body. While the drive structure drives the valve stem to rotate, the valve stem reciprocates within the valve body.

[0015] Specifically, the valve body has three ports, one of which connects to the valve stem, and the other two are used for water inlet and outlet. By moving the valve stem back and forth within the valve body, the water pressure and flow rate at the other two outlets of the valve body are changed, thereby achieving the pressure regulation function.

[0016] Preferably, when the valve stem rotates inward, the opening of the pressure regulating valve decreases; when the valve stem rotates outward, the opening of the pressure regulating valve increases.

[0017] Preferably, the outer wall of the end of the valve stem connected to the valve body is threaded, and the inner wall of the valve body is threaded to match the valve stem; the valve stem and the valve body are connected by threaded engagement.

[0018] Specifically, the threaded connection structure operates on the same principle as the reciprocating movement of a lead screw. The drive structure provides the rotational power, and the valve stem rotates along the thread while reciprocating to open or close the other two outlets of the valve body, thereby changing its water pressure and flow rate.

[0019] Preferably, a fixing member is provided at the interface where the valve body connects to the valve column, and the valve body is sealed to the fixing member; the fixing member is sleeved on the outside of the valve column and is engaged with the valve column.

[0020] Specifically, the fixing component not only serves to secure the valve stem but also restricts its range of motion, preventing it from moving out of the valve body. The fixing component and the valve stem can also be connected via a threaded connection to allow for rotational movement of the valve stem.

[0021] Preferably, a sealing ring is fitted at one end of the valve stem extending into the body of the valve body, and a valve ball is provided at the other end of the valve stem extending into the body of the valve body.

[0022] Specifically, the sealing ring acts as a seal to prevent water from flowing out of the valve body; the valve ball is mainly used to change the water flow rate at the valve body interface.

[0023] Preferably, the drive structure includes a plurality of drive wheels and a plurality of driven wheels. A drive shaft passes through the center of each drive wheel, and a driven shaft passes through the center of each driven wheel. The drive wheels and driven wheels are meshed together. A drive motor is connected to the drive shaft. One end of the valve column extends into the driven shaft and engages with it.

[0024] Specifically, the drive motor provides rotational power, which drives the drive shaft to rotate. The drive shaft drives the drive wheel to rotate. Utilizing the meshing structure, the drive wheel drives the driven wheel to rotate, which in turn drives the driven shaft to rotate. The rotation of the driven shaft drives the valve stem to rotate, thus providing rotational power to the valve stem.

[0025] Preferably, the outer wall of the end of the valve stem that is connected to the driven shaft is gear-shaped, and the inner wall of the driven shaft is provided with a serrated groove that is adapted to the outer wall of the valve stem. The driven shaft is sleeved on the outside of the valve stem and is connected to the valve stem through the serrated groove.

[0026] Specifically, the valve stem is located inside the driven shaft and is connected to the valve stem through a serrated groove, thereby driving the rotation of the valve stem.

[0027] A coffee machine that utilizes a pressure-adjustable extraction water path structure as described in any of the above.

[0028] Compared with the prior art, the present invention achieves the following beneficial effects:

[0029] This invention provides a pressure-adjustable extraction water circuit structure and its coffee machine, including a water tank, an electromagnetic pump, a heating element, and an extraction head. A pressure regulating valve is also included, electrically connected to a control board, which controls the valve. When coffee extraction begins, the electromagnetic pump starts pumping water, the electromagnetic valve opens, the heating element heats the water, and water from the tank enters the electromagnetic pump via a flow meter. The electromagnetic pump draws the water to the heating element, and then the water flows through the electromagnetic valve into the extraction head, creating pressure for coffee extraction. The control board activates the pressure regulating valve based on pressure feedback signals and adjusts its size to change the pressure distribution. The pressure in the extraction head also changes accordingly until the desired pressure is reached. Then, the pressure regulating valve stops working, ending the extraction and returning to its initial position. This achieves water pressure regulation during the coffee extraction process. This technical solution directly controls the pressure regulating valve to achieve real-time pressure change control of the entire pipeline system, resulting in rapid pressure adjustment with low latency. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a coffee machine according to an embodiment of the present utility model;

[0031] Figure 2 This is a schematic diagram of the connection of an adjustable pressure extraction water circuit structure in an embodiment of this utility model;

[0032] Figure 3 This is a schematic diagram of a pressure-adjustable extraction water circuit structure in an embodiment of this utility model;

[0033] Figure 4 This is a schematic diagram of the internal structure of a pressure regulating valve in an adjustable extraction water circuit structure according to an embodiment of this utility model.

[0034] Figure 5 This is a cross-sectional schematic diagram of a pressure regulating valve in an adjustable extraction water circuit structure according to an embodiment of this utility model.

[0035] Figure label:

[0036] 1. Coffee machine; 11. Water tank; 12. Electromagnetic pump; 13. Heating element; 14. Extraction head; 141. Pressure sensor; 15. Flow meter; 16. Solenoid valve; 17. T-fitting; 18. Wastewater box;

[0037] 2. Pressure regulating valve; 21. Valve column; 211. Sealing ring; 212. Valve ball; 22. Valve body; 221. Fixing component; 23. Drive structure; 231. Drive wheel; 232. Driven wheel; 233. Drive shaft; 234. Driven shaft; 235. Drive motor;

[0038] 3. Control panel. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] Example

[0041] like Figures 1 to 5 An adjustable pressure extraction water circuit structure is installed in the coffee machine 1, including a water tank 11, an electromagnetic pump 12, a heating block 13 and an extraction head 14 connected in sequence.

[0042] A flow meter 15 is provided between the water tank 11 and the electromagnetic pump 12, and an electromagnetic valve 16 is provided between the heating block 13 and the extraction head 14; the flow meter 15 and the electromagnetic pump 12, and the heating block 13 and the electromagnetic valve 16 are respectively connected by a three-way pipe fitting 17; a pressure regulating valve 2 is connected between the two three-way pipe fittings 17; a pressure sensor 141 is provided on the extraction head 14 for reading the pressure signal of the extraction head 14;

[0043] It also includes a control board 3, which is electrically connected to the electromagnetic pump 12, the heating block 13, the flow meter 15, the solenoid valve 16, the pressure sensor 141, and the pressure regulating valve 2. The control board 3 controls the opening of the pressure regulating valve 2 to increase or decrease according to the pressure signal indicating high or low pressure.

[0044] After the electromagnetic pump 12 starts, it draws water out of the water tank 11. At the same time, the electromagnetic valve 16 opens and the heating block 13 heats the water. The water in the water tank 11 enters the electromagnetic pump 12 through the flow meter 15. The electromagnetic pump 12 draws the water to the heating block 13 for heating, and then enters the extraction head 14 through the electromagnetic valve 16 to extract coffee under pressure. The control board 3 controls the pressure regulating valve 2 to change the water pressure in the extraction water circuit structure.

[0045] The extraction head 14 is also equipped with a pressure sensor 141, which is electrically connected to the control board 3.

[0046] Pressure sensor 141 is used to read pressure and provide feedback signal; control board 3 activates pressure regulating valve 2 to regulate pressure based on the feedback signal.

[0047] The output end of the electromagnetic pump 12 is also connected to a wastewater box 18.

[0048] Wastewater box 18 is used to collect the generated wastewater.

[0049] The pressure regulating valve 2 includes a valve stem 21, a drive structure 23 disposed at both ends of the valve stem 21, and a valve body 22. One end of the valve stem 21 extends into the drive structure 23 and is engaged with the drive structure 23. The other end of the valve stem 21 is engaged with the valve body 22 and extends into the valve body 22. While the drive structure 23 drives the valve stem 21 to rotate, the valve stem 21 reciprocates within the valve body 22.

[0050] The valve body 22 has three ports, one of which is connected to the valve stem 21, and the other two are used for water inlet and outlet. By moving the valve stem 21 back and forth within the valve body 22, the water pressure and flow rate of the other two outlets of the valve body 22 are changed, thereby achieving the function of pressure regulation.

[0051] When the valve stem rotates inward, the opening of the pressure regulating valve decreases; when the valve stem rotates outward, the opening of the pressure regulating valve increases.

[0052] The valve stem 21 is connected to the valve body 22 at one end, and its outer side wall is provided with threads. The inner side wall of the valve body 22 is provided with threads that are compatible with the valve stem 21. The valve stem 21 and the valve body 22 are connected by threaded engagement.

[0053] The threaded connection structure operates on the same principle as the reciprocating movement of a lead screw. The drive structure 23 provides the rotational power, and the valve column 21 reciprocates while rotating along the thread to open or close the other two outlets of the valve body 22, thereby changing its water pressure and flow rate.

[0054] A fixing member 221 is provided at the interface where the valve body 22 connects to the valve column 21, and the valve body 22 is sealed to the fixing member 221; the fixing member 221 is sleeved on the outside of the valve column 21 and is engaged with the valve column 21.

[0055] The fixing member 221 serves a fixing function while also limiting the range of movement of the valve stem 21, preventing it from moving out of the valve body 22. The fixing member 221 and the valve stem 21 can also be connected by a thread to allow the valve stem 21 to rotate.

[0056] A sealing ring 211 is provided at one end of the valve stem 21 extending into the inner side of the valve body 22, and a valve ball 212 is provided at the other end of the valve stem 21 extending into the inner side of the valve body 22.

[0057] The sealing ring 211 serves to seal and prevent water from flowing out of the valve body 22; the valve ball 212 is mainly used to change the water flow rate at the valve body 22 interface.

[0058] The drive structure 23 includes a plurality of drive wheels 231 and a plurality of driven wheels 232. A drive shaft 233 passes through the center of each drive wheel 231, and a driven shaft 234 passes through the center of each driven wheel 232. The drive wheels 231 and driven wheels 232 are meshed together. A drive motor 235 is connected to the drive shaft 233. One end of the valve column 21 extends into the driven shaft 234 and is engaged with the driven shaft 234.

[0059] The drive motor 235 provides rotational power, driving the drive shaft 233 to rotate. The drive shaft 233 drives the drive wheel 231 to rotate. Utilizing the meshing structure, the drive wheel 231 drives the driven wheel 232 to rotate, and also drives the driven shaft 234 to rotate. The rotation of the driven shaft 234 drives the valve spool 21 to rotate, thus providing rotational power to the valve spool 21 in sequence.

[0060] The outer side wall of the valve stem 21 connected to the driven shaft 234 is gear-shaped. The inner side wall of the driven shaft 234 is provided with a serrated groove that is adapted to the outer side wall of the valve stem 21. The driven shaft 234 is sleeved on the outside of the valve stem 21 and is connected to the valve stem 21 through the serrated groove.

[0061] The valve stem 21 is located inside the driven shaft 234 and is connected to the valve stem 21 through a serrated groove, thereby driving the rotation of the valve stem 21.

[0062] A coffee machine 1 employs a pressure-adjustable extraction water path structure as described above.

[0063] This invention provides a pressure-adjustable extraction water circuit structure and its coffee machine 1, including a water tank 11, an electromagnetic pump 12, a heating element 13, and an extraction head 14. It also includes a pressure regulating valve 2 and a pressure sensor 141, which are electrically connected to a control board 3. When coffee extraction begins, the electromagnetic pump 12 draws water, the electromagnetic valve 16 opens, and the heating element 13 starts heating. Water from the water tank 11 enters the electromagnetic pump 12 via a flow meter 15. The electromagnetic pump 12 draws the water to the heating element 13 for heating, and then through the electromagnetic valve 16 into the extraction head 14, creating pressure extraction. The pressure sensor 141 reads the pressure and provides a feedback signal. After receiving the feedback signal, the control board 3 activates the pressure regulating valve 2. By adjusting the size of the pressure regulating valve 2, the pressure of the extraction head 14 changes accordingly until the desired pressure is reached. At the end of the extraction, the pressure regulating valve 2 stops working and returns to its initial position, achieving automatic pressure regulation.

[0064] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model.

Claims

1. A pressure-adjustable extraction water path structure, installed inside a coffee machine, comprising a water tank, an electromagnetic pump, a heating element, and an extraction head connected in sequence; characterized in that, A flow meter is installed between the water tank and the electromagnetic pump, and an electromagnetic valve is installed between the heating block and the extraction head; the flow meter and the electromagnetic pump, and the heating block and the electromagnetic valve are respectively connected by a three-way pipe fitting; a pressure regulating valve is connected between the two three-way pipe fittings; a pressure sensor is installed on the extraction head to read the pressure signal of the extraction head; It also includes a control board, which is electrically connected to the electromagnetic pump, heating block, flow meter, solenoid valve, pressure sensor, and pressure regulating valve respectively; the control board controls the opening degree of the pressure regulating valve to increase or decrease according to the pressure signal indicating high or low pressure.

2. The pressure-adjustable extraction water path structure according to claim 1, characterized in that, The output end of the electromagnetic pump is also connected to a wastewater box.

3. The pressure-adjustable extraction water path structure according to claim 1, characterized in that, The pressure regulating valve includes a valve stem, a drive structure disposed at both ends of the valve stem, and a valve body. One end of the valve stem extends into the drive structure and is engaged with the drive structure. The other end of the valve stem is engaged with the valve body and extends into the valve body. While the drive structure drives the valve stem to rotate, the valve stem reciprocates within the valve body.

4. The pressure-adjustable extraction water path structure according to claim 3, characterized in that, When the valve stem rotates inward, the opening of the pressure regulating valve decreases; when the valve stem rotates outward, the opening of the pressure regulating valve increases.

5. The pressure-adjustable extraction water path structure according to claim 4, characterized in that, The valve stem has a threaded outer wall at one end where it connects to the valve body, and the valve body has a threaded inner wall that is compatible with the valve stem; the valve stem and the valve body are connected by a threaded engagement.

6. The pressure-adjustable extraction water path structure according to claim 4, characterized in that, A fixing component is provided at the interface where the valve body connects to the valve column, and the valve body is sealed to the fixing component; the fixing component is sleeved on the outside of the valve column and is engaged with the valve column.

7. The pressure-adjustable extraction water path structure according to claim 4, characterized in that, A sealing ring is fitted at one end of the valve stem extending into the body of the valve body, and a valve ball is provided at the other end of the valve stem extending into the body of the valve body.

8. The pressure-adjustable extraction water path structure according to claim 4, characterized in that, The drive structure includes several drive wheels and several driven wheels. A drive shaft passes through the center of each drive wheel, and a driven shaft passes through the center of each driven wheel. The drive wheels and driven wheels are meshed together. A drive motor is connected to the drive shaft. One end of the valve column extends into the driven shaft and is engaged with the driven shaft.

9. The pressure-adjustable extraction water path structure according to claim 8, characterized in that, The outer side wall of the valve stem connected to the driven shaft is gear-shaped, and the inner side wall of the driven shaft is provided with a serrated groove that is adapted to the outer side wall of the valve stem. The driven shaft is sleeved on the outside of the valve stem and is connected to the valve stem through the serrated groove.

10. A coffee machine, characterized in that, The extraction water path structure with adjustable pressure as described in any one of claims 1 to 9 is applied.

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