Pressure stabilizing valve and coffee machine using same

Abstract

The utility model discloses a pressure maintaining valve and a coffee machine using the same, the pressure maintaining valve comprises a valve body, the valve body is a three-way structure, the valve body is respectively provided with a water inlet part, a piston connecting part and an electromagnetic valve connecting part, and the piston connecting part is arranged between the water inlet part and the electromagnetic valve connecting part; in a water inlet state, the electromagnetic valve connecting part is in a closed state, cold water enters the valve body from the water inlet part and flows out of the piston connecting part, and when external pressure is too large, the cold water cannot flow back through the water inlet part; in the pressure relief state, the electromagnetic valve connecting part is in the open state, and redundant cold water flows back into the valve body from the piston connecting part and finally flows out of the electromagnetic valve connecting part for pressure relief. The structure design is reasonable, in the water inlet state, cold water enters the valve body through the water inlet part and then flows out through the piston connecting part, and when the extraction pressure is too large, water flow cannot flow back through the water inlet part and cannot flow out through the electromagnetic valve connecting part, so that the retraction distance of the piston can be reduced, and the stability of the coffee machine is improved.

Description

Technical Field

[0001] This utility model relates to the field of coffee machines, and more particularly to a pressure regulating valve and a coffee machine using the pressure regulating valve. Background Technology

[0002] In the past, coffee was the exclusive domain of a few high-end consumers. However, with economic development and the progress of the times, coffee culture has continued to spread, and coffee has become integrated into the lives of ordinary people. Nowadays, various coffee machines have entered ordinary households in large numbers. With the popularity of home coffee machines, many people are keen to make coffee at home. As a result, fully automatic coffee machines are becoming increasingly popular, mainly because they are convenient and quick to use, automating the entire process from grinding coffee beans to brewing coffee with hot water.

[0003] Coffee machines typically have hot water and cold water circuits. The cold water circuit contains a piston to compensate for the water level. The hot water circuit uses hot water to extract the coffee. When the pressure is too high during extraction, the piston will retract to some extent under the pressure, causing water leakage during extraction and creating a bad impression on the user. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a pressure regulating valve and a coffee machine that uses the pressure regulating valve, in view of the current situation of the prior art.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a pressure regulating valve, including a valve body, the valve body having a three-way structure, and the valve body being provided with a water inlet, a piston connection, and a solenoid valve connection, the piston connection being arranged between the water inlet and the solenoid valve connection; in the water inlet state, the solenoid valve connection is in the closed state, cold water enters the valve body from the water inlet and flows out from the piston connection, when the external pressure is too high, the cold water cannot flow back through the water inlet; in the pressure relief state, the solenoid valve connection is in the open state, excess cold water flows back into the valve body from the piston connection and finally flows out from the solenoid valve connection to relieve pressure.

[0006] Preferably, the valve body is provided with an inlet chamber and a flow chamber. The inlet chamber is connected to the inlet part, and the flow chamber is connected to the piston connection part. The valve body is provided with a movable pusher, and a pressure relief valve is fixedly provided in the valve body. The pressure relief valve is arranged at the solenoid valve connection part, and the pusher is arranged near the inlet part.

[0007] Preferably, the water inlet cavity and the flow cavity are connected by an expanding cavity, the inner wall of the expanding cavity is an inclined section that extends outward from the water inlet cavity to the flow cavity, the outer wall of the pusher is in contact with the inner wall of the water inlet cavity, and the pusher is provided with a pushing surface for being pushed by water.

[0008] Preferably, the pusher and the pressure relief valve are connected by a spring. Water enters the water inlet chamber through the water inlet part. The water pushes the pusher to move towards the pressure relief valve through the push surface. The spring is compressed. When the front end of the pusher moves to the expansion cavity, a gap is generated between the outer wall of the pusher and the inclined section. The water in the water inlet chamber enters the flow chamber through the gap and then flows out through the piston connection part that communicates with the flow chamber.

[0009] Preferably, the pressure relief valve has a pressure relief channel that connects the flow chamber and the solenoid valve connection part, and both the pusher and the outer wall of the pressure relief valve are fitted with sealing rings.

[0010] A coffee machine includes a four-way pipe, which is connected to an inlet water path, a cold water path, a hot water extraction path, and a pressure relief path. The pressure regulating valve is connected to the cold water path. The inlet water path is connected to the inlet water path through the four-way pipe. A piston is connected to the piston connection part. The solenoid valve connection part is connected to the pressure relief path. The pressure relief path is equipped with a solenoid valve, which opens when the pressure is released.

[0011] Compared with the prior art, the advantages of this utility model are as follows: When the water is in the inlet state, cold water enters the valve body through the inlet and then flows out through the piston connection. When the extraction pressure is too high, the water cannot flow back through the inlet or through the solenoid valve connection. Therefore, the piston retraction distance can be reduced and the stability of the coffee machine can be improved. Attached Figure Description

[0012] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0013] Figure 2 This is a schematic diagram of the structure of this utility model;

[0014] Figure 3 This is a schematic diagram of the water circuit of the coffee machine of this utility model.

[0015] Reference numerals: 1. Valve body; 2. Water inlet; 3. Piston connection; 4. Solenoid valve connection; 5. Water inlet chamber; 6. Flow chamber; 7. Pushing element; 8. Pressure relief valve; 9. Expanding chamber; 10. Inclined section; 11. Pushing surface; 12. Spring; 13. Pressure relief channel; 14. Sealing ring; 15. Four-way pipe; 16. Water inlet path; 17. Cold water path; 18. Hot water extraction path; 19. Pressure relief path; 20. Piston; 21. Solenoid valve. Detailed Implementation

[0016] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0017] It should be noted that all directional indications in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0018] Furthermore, in addition to indicating orientation or positional relationship, the aforementioned terms may also be used to indicate other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in this utility model can be understood according to the specific circumstances.

[0019] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts. The connection methods described herein are existing technologies without any modifications and are common knowledge to those skilled in the art. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0021] like Figures 1 to 3As shown, this utility model provides a pressure regulating valve, including a valve body 1. The valve body 1 has a three-way structure and is provided with a water inlet 2, a piston connection 3, and a solenoid valve connection 4. The piston connection 3 is arranged between the water inlet 2 and the solenoid valve connection 4. Specifically, in the water inlet state, the solenoid valve connection 4 is in the closed state, and cold water enters the valve body 1 from the water inlet 2 and flows out from the piston connection 3. When the external pressure is too high, the cold water cannot flow back through the water inlet 2. In the pressure relief state, the solenoid valve connection 4 is in the open state, and excess cold water flows back into the valve body 1 from the piston connection 3 and finally flows out from the solenoid valve connection 4 to relieve pressure.

[0022] The valve body 1 is provided with an inlet chamber 5 and a flow chamber 6. The inlet chamber 5 is connected to the inlet part 2, and the flow chamber 6 is connected to the piston connection part 3. Specifically, the valve body 1 is provided with a movable pusher 7, and a pressure relief valve 8 is fixedly provided in the valve body 1. The pressure relief valve 8 is arranged at the solenoid valve connection part 4, and the pusher 7 is arranged near the inlet part 2.

[0023] The water inlet cavity 5 and the flow cavity 6 are connected by an expansion cavity 9. The inner wall of the expansion cavity 9 is an inclined section 10 that extends outward from the water inlet cavity 5 to the flow cavity 6. Specifically, the outer wall of the pusher 7 is in contact with the inner wall of the water inlet cavity 5, and the pusher 7 is provided with a push surface 11 for being pushed by water.

[0024] The pusher 7 and the pressure relief valve 8 are connected by a spring 12. Water enters the water inlet chamber 5 through the water inlet 2. The water pushes the pusher 7 towards the pressure relief valve 8 through the push surface 11. The spring 12 is compressed. When the front end of the pusher 7 moves to the expansion cavity 9, a gap is generated between the outer wall of the pusher 7 and the inclined section 10. The water in the water inlet chamber 5 enters the flow chamber 6 through the gap and then flows out through the piston connection part 3 that is connected to the flow chamber 6.

[0025] The pressure relief valve 8 has a pressure relief channel 13 that connects the flow chamber 6 and the solenoid valve connection part 4. Both the pusher 7 and the outer wall of the pressure relief valve 8 are fitted with sealing rings 14.

[0026] A coffee machine includes a four-way pipe 15, which is connected to a water inlet passage 16, a cold water passage 17, a hot water extraction passage 18, and a pressure relief passage 19. A pressure regulating valve is connected to the cold water passage 17. Specifically, the water inlet 2 is connected to the water inlet passage 16 through the four-way pipe 15, a piston 20 is connected to the piston connection 3, and a solenoid valve connection 4 is connected to the pressure relief passage 19. A solenoid valve 21 is provided on the pressure relief passage 19. When the pressure is released, the solenoid valve 21 is opened.

[0027] The working principle of this utility model is as follows: In the water inlet state, the solenoid valve 21 on the pressure relief water path 19 is closed. External water enters the coffee machine through the water inlet path 16, and then flows into the cold water path 17 and the hot water extraction path 18 through the four-way pipe 15 respectively. Coffee is extracted in the hot water extraction path 18. Water in the cold water path 17 enters the water inlet chamber 5 through the water inlet part 2 of the valve body 1. The water in the water inlet chamber 5 moves the pusher 7 towards the pressure relief valve 8 through the push surface 11. The spring 12 is compressed. When the front end of the pusher 7 moves to the expansion cavity 9, a gap is created between the outer wall of the pusher 7 and the inclined section 10. The water in the water inlet chamber 5 enters the flow chamber 6 through the gap, and then flows out to the piston 20 through the piston connection part 3 connected to the flow chamber 6. Since the solenoid valve 21 is closed, water cannot pass through the solenoid valve 21 connection part 4 on the valve body 1. Figure 3 As shown, a back pressure is set outside the extraction system, so when the water pump supplies water, it will first enter the cold water circuit 17. After the piston 20 in the cold water circuit 17 is compensated, the pressure value compensated by the hydraulic compensation device corresponding to the piston 20 reaches the limit, and then the water in the pump will flow into the hot water extraction circuit 18 and enter the extraction system for extraction. Therefore, when the pressure is too high during the extraction process, the water in the piston 20 cannot flow back to the valve body 1 through the piston connection 3 and then be discharged through the solenoid valve connection 4. Also, since the water intake is completed, the spring 12 and the pusher 7 in the valve body 1 return to their original positions. The outer wall of the pusher 7 is in contact with the inner wall of the water inlet chamber 5, and the water in the piston 20 cannot flow back to the valve body 1 through the piston connection 3 and then be discharged through the water inlet 2. Therefore, the retraction distance of the piston 20 can be reduced, and the stability of the coffee machine can be improved.

[0028] After extraction is complete, open solenoid valve 21. At this time, the pressure is released. Excess water in cold water circuit 17 flows back to valve body 1 through piston connection 3, and then is discharged to pressure relief water circuit 19 through solenoid valve connection 4. Finally, it is discharged to water tank through solenoid valve 21. Excess water in hot water extraction circuit 18 flows to pressure relief water circuit 19 through four-way pipe 15, and is finally discharged to water tank through solenoid valve 21.

[0029] The advantages of this invention are as follows: When the water is in the inlet state, cold water enters the valve body 1 through the inlet 2 and then flows out through the piston connection 3. When the extraction pressure is too high, the water cannot flow back through the inlet 2, nor can it flow out through the solenoid valve connection 4. Therefore, the retraction distance of the piston 20 can be reduced, and the stability of the coffee machine can be improved.

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

[0031] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the existing technology, and will not be described in detail here.

[0032] The above description is only a preferred embodiment of this utility model. For those skilled in the art, various modifications and variations can be made in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A pressure stabilizing valve comprising a valve body, characterized by: The valve body has a three-way structure, with an inlet, a piston connection, and a solenoid valve connection. The piston connection is located between the inlet and the solenoid valve connection. In the inlet state, the solenoid valve connection is closed, and cold water enters the valve body from the inlet and flows out from the piston connection. When the external pressure is too high, the cold water cannot flow back through the inlet. In the depressurization state, the solenoid valve connection is open, and excess cold water flows back into the valve body from the piston connection and finally flows out from the solenoid valve connection to depressurize.

2. A pressure stabilizing valve according to claim 1, characterized in that: The valve body is provided with an inlet chamber and a flow chamber. The inlet chamber is connected to the inlet part, and the flow chamber is connected to the piston connection part. The valve body is provided with a movable pusher. The valve body is fixedly provided with a pressure relief valve. The pressure relief valve is arranged at the solenoid valve connection part, and the pusher is arranged near the inlet part.

3. A pressure stabilizing valve according to claim 2, characterized in that: The water inlet chamber and the flow chamber are connected by an expanding cavity. The inner wall of the expanding cavity is a sloping section that extends outward from the water inlet chamber to the flow chamber. The outer wall of the pusher is in contact with the inner wall of the water inlet chamber. The pusher is provided with a pushing surface for being propelled by water.

4. A pressure stabilizing valve according to claim 3, wherein: The pusher and the pressure relief valve are connected by a spring. Water enters the inlet chamber through the inlet part and pushes the pusher towards the pressure relief valve through the push surface. The spring is compressed. When the front end of the pusher moves to the expansion cavity, a gap is created between the outer wall of the pusher and the inclined section. The water in the inlet chamber enters the flow chamber through the gap and then flows out through the piston connection part that communicates with the flow chamber.

5. A pressure stabilizing valve according to claim 2, wherein: The pressure relief valve has a pressure relief channel that connects the flow chamber and the solenoid valve connection part, and both the pusher and the outer wall of the pressure relief valve are fitted with sealing rings.

6. A coffee maker characterized in that: It includes a four-way pipe, which is connected to an inlet water path, a cold water path, a hot water extraction path, and a pressure relief path. A pressure stabilizing valve according to any one of claims 1-5 is connected to the cold water path. The inlet part is connected to the inlet water path through the four-way pipe. A piston is connected to the piston connection part. The solenoid valve connection part is connected to the pressure relief path. A solenoid valve is provided on the pressure relief path. When the pressure is relieved, the solenoid valve opens.

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