Combined valve group for an extraction water circuit

Abstract

A combined valve group for an extraction water system, comprising a back pressure valve and a valve seat, characterized in that the back pressure valve has a first water inlet and a first water outlet for hot water inflow and outflow respectively, a plug is arranged in the back pressure valve to keep the first water inlet closed, and the plug can open the first water inlet under the action of water pressure to make the first water inlet communicate with the first water outlet; the valve seat has a second water inlet, a second water outlet and an air inlet which communicate with each other, the first water outlet of the back pressure valve communicates with the second water inlet of the valve seat, and a one-way valve is arranged in the valve seat to keep the air inlet closed, and the one-way valve can open the air inlet to make gas flow out from the second water outlet through the air inlet. The combined valve group uses the valve seat to arrange the one-way valve at the rear end of the back pressure valve, avoids the case that the air inlet pressure of the valve seat cannot open the plug of the back pressure valve, and makes the combined valve group have better use effect in the extraction water system.

Description

Technical Field

[0001] This utility model relates to the field of beverage extraction equipment technology, and in particular to a combined valve group for an extraction water circuit system. Background Technology

[0002] Beverage extraction equipment is a device that uses high-pressure, rapid heating of water to extract the corresponding liquid from the contents of a container. It is suitable for processing containers (capsules) containing ingredients, where the ingredients interact with the water introduced into the capsule to extract the corresponding liquid. Existing beverage extraction equipment, such as the brewing device used for extracting capsules (as shown in Chinese Utility Model Patent Application No. CN201621224593.0 (Authorization Announcement No. CN206482457U), involves pushing the pressing part downwards, causing the hydraulic cylinder to move downwards. A piercing needle punctures the coffee capsule, and water enters the cylinder. Under water pressure, the piston moves downwards, causing the silicone cap to squeeze and seal the coffee capsule. As the water pressure inside the cylinder gradually increases, the valve core moves downwards under the force of the water pressure, compressing the pressure spring. Water then flows into the coffee capsule through the injection hole, completing the coffee brewing process.

[0003] Currently, beverage extraction equipment often uses high pressure and heated water to extract from capsules. Therefore, the extraction water system in beverage extraction equipment is equipped with a back pressure valve to ensure the pressure of the water used for extraction. Existing back pressure valves, such as those described in Chinese Utility Model Patent Application No. CN200920197948.5 (Authorization Announcement No. CN201523987U), have a brewing device with a hot water channel connected to a hot water inlet. The brewing device is equipped with a valve seat, and the valve seat has a water inlet channel connected to the hot water channel. The water inlet channel has a sealing plug that is held by a spring and blocks the lower outlet of the hot water channel. When the hot water reaches a certain pressure, it pushes open the sealing plug, and the hot water enters the coffee bag through the water inlet channel for extraction.

[0004] Although the aforementioned extraction water circuit system includes a back pressure valve to ensure hot water pressure, the layout of this back pressure valve has certain defects. Specifically, the existing extraction water circuit system also includes a blow-through check valve for air intake to remove extraction residues. This blow-through check valve is often located upstream of the back pressure valve. When removing extraction residues, both the valve plug of the blow-through check valve and the sealing plug of the back pressure valve need to be opened simultaneously to allow gas to be blown in for residue removal. However, the sealing plug of the back pressure valve requires relatively high pressure to open, while the air intake pressure of the blow-through check valve is too low to open the sealing plug of the back pressure valve, thus affecting the removal effect of the blow-through check valve. Therefore, further improvements are needed to the combined valve assembly used in the extraction water circuit system. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a combined valve assembly with a reasonable structure that can guarantee the removal of extraction residues, in view of the above-mentioned existing technology. This combined valve assembly is applied to the extraction water circuit system.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the combined valve assembly for the extraction water circuit system includes a back pressure valve and a valve seat, characterized in that: the back pressure valve has a first inlet and a first outlet for hot water to flow in and out respectively, and the back pressure valve is provided with a plug that maintains the tendency to block the first inlet. The plug can open the first inlet under the action of water pressure, so that the first inlet and the first outlet are connected; the valve seat has a second inlet, a second outlet and an air inlet that are interconnected. The first outlet of the back pressure valve is connected to the second inlet of the valve seat, and the valve seat is provided with a one-way valve that maintains the tendency to seal the air inlet. The one-way valve can open the air inlet to allow gas to flow out from the second outlet after passing through the air inlet.

[0007] Furthermore, the back pressure valve is provided with a first connector, one end of which protrudes from the back pressure valve and can be inserted into and fixed in the second inlet of the valve seat, and the other end of the first connector is a first outlet. This first connector allows the outlet of the back pressure valve to communicate with the inlet of the valve seat, and a one-way valve for blowing air is located at the rear end of the back pressure valve.

[0008] Furthermore, the back pressure valve is provided with a hot water flow channel between the first inlet and the first outlet, and the plug is disposed within the hot water flow channel. The plug can move along the extension direction of the hot water flow channel to block or open the first inlet. This arrangement of the hot water flow channel allows the plug to move within the back pressure valve, thereby enabling the plug to block or open the first inlet.

[0009] Furthermore, the hot water flow channel is equipped with a spring that is always in a compressed state. One end of the spring abuts against the plug, and under the action of the spring, the plug seals the first water inlet. Under the elastic force of the compressed spring, the plug can be moved towards the first water inlet, thus sealing it.

[0010] Furthermore, the one-way valve has an outwardly protruding sealing portion, which is elastic and tends to seal the air inlet. Under the action of water pressure inside the valve seat, the sealing portion further seals the air inlet. When air is blown into the valve seat through the air inlet, the sealing portion deforms, thereby opening the air inlet to allow gas to flow into the valve seat. The sealing portion of the one-way valve is elastic and tends to seal the air inlet, thereby preventing water from flowing out of the valve seat. When the high-pressure hot water flowing out of the back pressure valve flows into the second water inlet of the valve seat, the water pressure inside the valve seat increases. Under the action of water pressure, the sealing portion of the one-way valve is further pushed into the air inlet to seal it. When no water flows into the second water inlet of the valve seat, the water pressure inside the valve seat is released, and the one-way valve returns to its natural state under the action of its own elastic force. Then, the air pump blows air into the valve seat through the air inlet, causing the sealing portion on the one-way valve to deform, thereby opening the air inlet and allowing gas to flow into the valve seat through the air inlet.

[0011] Furthermore, the one-way valve also has a ring surrounding the sealing portion, with multiple spaced vent holes on the ring. When the sealing portion is open at the air inlet, gas flows into the valve seat sequentially through the air inlet and the vent holes. This ring design allows it to abut against the outer periphery of the air inlet, thus completely sealing the air inlet. When the one-way valve is open at the air inlet, the vent holes on the ring also facilitate gas flow into the valve seat.

[0012] Furthermore, the inner surface of the one-way valve is arched. This shape of the seal gives the one-way valve better elastic recovery; after the seal is deformed by pressure, it can quickly recover its deformation and re-seal the air inlet when the pressure is removed.

[0013] Furthermore, the air inlet is wider on the outside and narrower on the inside, while the sealing part is narrower on the outside and wider on the inside. The inner diameter of the outer end of the air inlet is smaller than the outer diameter of the sealing part. The protrusion of the sealing part is narrower on the outside and wider on the inside, and the air inlet is wider on the outside and narrower on the inside, allowing the sealing part to be easily inserted into the air inlet in its natural state. The inner diameter of the outer end of the air inlet is smaller than the outer diameter of the sealing part, causing the sealing part to deform within the air inlet, thereby sealing the air inlet.

[0014] Furthermore, the valve seat is provided with a second connector, one end of which is exposed outside the valve seat and connected to the air pump, and the other end of which is an air inlet. The one-way valve is located inside the air inlet. This second connector allows the air pump to connect to the air inlet, enabling gas to be blown into the valve seat.

[0015] Furthermore, the valve seat is also provided with a third connector. One end of the third connector is exposed outside the valve seat and connected to the hot water inlet channel used for extraction in the extraction water circuit system. The other end of the third connector is a second outlet. This third connector allows the high-pressure hot water flowing from the valve seat to flow into the capsule to be extracted, thereby completing the extraction.

[0016] Compared with the prior art, the advantages of this utility model are as follows: The combined valve assembly of this application utilizes a valve seat, with the one-way valve positioned at the rear end of the back pressure valve. This avoids the situation where the air inlet pressure of the valve seat cannot open the plug of the back pressure valve. In other words, the gas flowing into the valve seat through the air inlet does not need to pass through the back pressure valve and is directly output from the second outlet of the valve seat, thus ensuring the effective removal of extraction residue by air blowing from the valve seat. Furthermore, the back pressure valve of this application can maintain the pressure of the hot water using the plug, thereby ensuring the extraction effect. The one-way valve of this application prevents the fluid inside the valve seat from flowing out of the air inlet, thus ensuring a better sealing effect at the air inlet when hot water flows inside the valve seat. Therefore, the combined valve assembly of this application performs better in extraction water circuit systems. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a cross-sectional view of an embodiment of the present utility model (the one-way valve opens the air inlet, and the plug seals the first water inlet);

[0019] Figure 3 This is a cross-sectional view of an embodiment of the present utility model (a one-way valve seals the air inlet, and a plug opens the first water inlet);

[0020] Figure 4 This is a schematic diagram of the one-way valve in an embodiment of the present invention;

[0021] Figure 5 This is a cross-sectional view of the one-way valve in an embodiment of this utility model. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figures 1-5 The figure shown is the preferred embodiment of this utility model.

[0024] like Figures 1-3As shown, the combined valve assembly of this embodiment is applied to an extraction water circuit system. The combined valve assembly includes a back pressure valve 1 and a valve seat 2. The back pressure valve 1 has a first inlet 11 for supplying hot water and a first outlet 12 for supplying hot water. A hot water flow channel 15 for supplying hot water is provided between the first inlet 11 and the first outlet 12. The back pressure valve 1 also has a plug 13 that tends to block the first inlet 11. The plug 13 is disposed in the hot water flow channel 15. Under the action of force, the plug 13 can move along the extension direction of the hot water flow channel 15 to block or open the first outlet 11. A water inlet 11 is provided; specifically, a spring 16 that is always in a compressed state is also provided in the hot water flow channel 15. One end of the spring 16 abuts against the plug 13. Under the action of the spring 16, the plug 13 moves towards the first water inlet 11 to block the first water inlet 11. When the hot water flowing in through the first water inlet 11 reaches a certain pressure, the water pressure can push open the plug 13, and the plug 13 opens the first water inlet 11, so that the first water inlet 11 is connected to the first water outlet 12. The hot water flows out from the first water outlet 12 after passing through the hot water flow channel 15, so that the back pressure valve 1 can ensure the high pressure effect of the hot water.

[0025] In this embodiment, the valve seat 2 has a second inlet 21, a second outlet 22, and an air inlet 23 that are interconnected. The first outlet 12 of the back pressure valve 1 is connected to the second inlet 21 of the valve seat 2. That is, the back pressure valve 1 is provided with a first connector 14. One end of the first connector 14 is exposed outside the back pressure valve 1 and can be inserted into and fixed inside the second inlet 21 of the valve seat 2. The other end of the first connector 14 is the first outlet 12. The first connector 14, as configured in this way, allows the back pressure valve 1 to be connected to the valve seat 2, that is, the high-pressure hot water flowing out of the back pressure valve 1 can flow into the valve seat 2. Furthermore, in this embodiment, the valve seat 2 is provided with a third connector 25. One end of the third connector 25 is exposed outside the valve seat 2 and is connected to the hot water inlet channel used for extraction in the extraction water circuit system. The other end of the third connector 25 is the second outlet 22. The hot water inlet channel used for extraction in the extraction water circuit system is connected to the capsule to be extracted, so that the high-pressure hot water in the back pressure valve 1 can flow into the capsule to be extracted after passing through the valve seat 2 for extraction. In addition, the valve seat 2 in this embodiment is also provided with a second connector 24. One end of the second connector 24 is exposed outside the valve seat 2 and is connected to the air pump. The other end of the second connector 24 is an air inlet 23. The air pump can be connected to the second connector 24 of the valve seat 2 so that the gas generated by the air pump is blown into the valve seat 2 through the air inlet 23.

[0026] like Figures 2-5As shown, the valve seat 2 in this embodiment is provided with a one-way valve 3 that tends to keep the air inlet 23 sealed. The one-way valve 3 can open the air inlet 23 so that gas can flow out from the second outlet 22 after passing through the air inlet 23. The one-way valve 3 is an elastomer made of silicone material and is located inside the air inlet 23. The one-way valve 3 has an outwardly protruding sealing part 31 and a ring part 32 surrounding the sealing part 31. The sealing part 31 has elasticity that maintains the tendency to seal the air inlet 23. The inner surface 33 of the one-way valve 3 is arched. Under the action of water pressure in the valve seat 2, the sealing part 31 further seals the air inlet 23. When air is blown into the valve seat 2 through the air inlet 23, the sealing part 31 deforms to open the air inlet 23 so that gas can flow into the valve seat 2. In this embodiment, the ring part 32 is provided with a plurality of spaced vent holes 321. When the sealing part 31 opens the air inlet 23, the gas flows into the valve seat 2 through the air inlet 23 and the vent holes 321 in sequence. In addition, in order to allow the sealing part 31 to be smoothly inserted into the air inlet 23 in its natural state, the air inlet 23 is larger on the outside and smaller on the inside, and the sealing part 31 is smaller on the outside and larger on the inside. The inner diameter of the outer end of the air inlet 23 is smaller than the outer diameter of the sealing part 31. The sealing part 31 will deform inside the air inlet 23, thereby sealing the air inlet 23.

[0027] The workflow of this embodiment is as follows:

[0028] A. When back pressure valve 1 is working, such as Figure 3 As shown, hot water flows into the back pressure valve 1 through the first inlet 11. When the hot water reaches a certain pressure, it will push open the plug 13 in the back pressure valve 1, thereby connecting the first inlet 11 and the first outlet 12 through the hot water flow channel 15. The hot water can flow along the hot water flow channel 15 and then flow out from the first outlet 12. The hot water flowing out from the first outlet 12 flows into the valve seat 2 through the second inlet 21. Under the water pressure of the hot water, the one-way valve 3 further seals the air inlet 23, so that the hot water can only flow out from the second outlet 22 of the valve seat 2. The hot water after flowing out is connected to the hot water flow channel for extraction through the third connector 25. The hot water is used to extract the capsule to be extracted.

[0029] B. When valve seat 2 is purged, such as Figure 2 As shown, at this time, the back pressure valve 1 is not working. The air pump blows air into the valve seat 2 through the second connector 24 and the air inlet 23, causing the sealing part 31 of the one-way valve 3 to deform, thereby opening the air inlet 23 and allowing the gas to flow into the valve seat 2 through the air inlet 23 and the vent 321. The gas is used to remove the extraction residue and ensure the effectiveness of the extraction water circuit system.

Claims

1. A combined valve assembly for an extraction water system, comprising a back pressure valve (1) and a valve seat (2), characterized in that: The back pressure valve (1) has a first inlet (11) and a first outlet (12) for hot water to flow in and out respectively. The back pressure valve (1) is provided with a plug (13) that tends to block the first inlet (11). The plug (13) can open the first inlet (11) under the action of water pressure, so that the first inlet (11) and the first outlet (12) are connected. The valve seat (2) has a second inlet (21), a second outlet (22) and an air inlet (23) that are connected to each other. The first outlet (12) of the back pressure valve (1) is connected to the second inlet (21) of the valve seat (2). The valve seat (2) is provided with a one-way valve (3) that tends to seal the air inlet (23). The one-way valve (3) can open the air inlet (23) so that gas flows out from the second outlet (22) after passing through the air inlet (23).

2. The combined valve assembly according to claim 1, characterized in that: The back pressure valve (1) is provided with a first connector (14), one end of which is exposed outside the back pressure valve (1) and can be inserted into and fixed in the second inlet (21) of the valve seat (2), and the other end of the first connector (14) is the first outlet (12).

3. The combined valve assembly according to claim 1, characterized in that: The back pressure valve (1) has a hot water flow channel (15) for hot water flow between the first inlet (11) and the first outlet (12). The plug (13) is located in the hot water flow channel (15). The plug (13) can move along the extension direction of the hot water flow channel (15) to block or open the first inlet (11).

4. The combined valve assembly according to claim 3, characterized in that: The hot water flow channel (15) is also provided with a spring (16) that is always in a compressed state. One end of the spring (16) abuts against the plug (13). Under the action of the spring (16), the plug (13) blocks the first water inlet (11).

5. The combined valve assembly according to claim 1, characterized in that: The one-way valve (3) has an outwardly protruding sealing part (31), which has elasticity to maintain the tendency to seal the air inlet (23). Under the action of water pressure in the valve seat (2), the sealing part (31) further seals the air inlet (23). When air is blown into the valve seat (2) through the air inlet (23), the sealing part (31) deforms to open the air inlet (23) so that gas can flow into the valve seat (2).

6. The combined valve assembly according to claim 5, characterized in that: The one-way valve (3) also has a ring (32) surrounding the periphery of the sealing part (31). The ring (32) is provided with a plurality of vent holes (321) arranged at intervals. When the sealing part (31) is open at the air inlet (23), the gas flows into the valve seat (2) through the air inlet (23) and the vent holes (321) in sequence.

7. The combined valve assembly according to claim 6, characterized in that: The inner surface (33) of the one-way valve (3) is arched.

8. The combined valve assembly according to claim 6, characterized in that: The air inlet (23) is larger on the outside and smaller on the inside, and the sealing part (31) is smaller on the outside and larger on the inside. The inner diameter of the outer end of the air inlet (23) is smaller than the outer diameter of the sealing part (31).

9. The combined valve assembly according to claim 1, characterized in that: The valve seat (2) is provided with a second connector (24), one end of which is exposed outside the valve seat (2) and connected to the air pump. The other end of the second connector (24) is an air inlet (23), and the one-way valve (3) is located inside the air inlet (23).

10. The combined valve assembly according to claim 1, characterized in that: The valve seat (2) is also provided with a third connector (25). One end of the third connector (25) is exposed outside the valve seat (2) and is connected to the hot water inlet channel used for extraction in the extraction water circuit system. The other end of the third connector (25) is the second outlet (22).

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