Control valve assembly and electromagnetic valve with same

Abstract

The utility model provides a control valve assembly and an electromagnetic valve with the control valve assembly, and the control valve assembly comprises a valve body assembly which is provided with a circulation cavity and is provided with a first valve port and a second valve port which are oppositely arranged; the piston assembly is arranged in the circulation cavity, the piston assembly is provided with a first sealing end and a second sealing end which are oppositely arranged, the first sealing end corresponds to the first valve port and can move relative to the first valve port so as to block or open the first valve port, and the second sealing end corresponds to the second sealing end; the second sealing end can move relative to the second valve port so as to block or open the second valve port; and circulation spaces allowing fluid to circulate are formed between the outer wall of the piston assembly and the inner wall of the circulation cavity, and the circulation spaces are symmetrically arranged along the perpendicular bisector of the connecting line of the first valve port and the second valve port. By means of the technical scheme, the problem that in the prior art, an electromagnetic valve is inconsistent in flow capacity under the condition that fluid flows in two directions can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of control valves, in particular to a control valve component and a solenoid valve having the same. Background Art

[0002] At present, in air-conditioning and refrigeration systems, solenoid valves are usually used to control the on-off of fluids in system pipelines.

[0003] The solenoid valve in the prior art usually includes a pilot valve assembly, a valve body assembly and a piston assembly. The valve body assembly has a circulation chamber, and the circulation chamber has a valve port. The valve port is used to connect to the system pipeline. The piston assembly is arranged in the circulation chamber, and can block or open the valve port under the drive of the pilot valve assembly, thereby realizing the control of the fluid on and off. In the prior art, in order to meet the control requirements of the fluid in different situations, the solenoid valve is usually set as a solenoid valve that can flow in both directions. Under different circulation conditions, the fluid in the circulation chamber will have two movement directions. Because the piston assembly is arranged in the circulation chamber, the fluids in the two directions need to pass through the piston assembly from different directions when flowing, which leads to different paths of the fluid. When the fluid flows through the circulation chamber in different directions, the flow resistance and flow area that may be encountered are different, resulting in inconsistent flow capacity of the solenoid valve when controlling the fluids in different directions, affecting the use effect of the solenoid valve. Utility Model Content

[0004] The utility model provides a control valve component and a solenoid valve having the same, so as to solve the problem of inconsistent flow capacity of the solenoid valve in the prior art under the condition of bidirectional flow of fluid.

[0005] According to one aspect of the utility model, a control valve assembly is provided, which includes: a valve body assembly having a circulation cavity, the valve body assembly having a first valve port and a second valve port which are arranged oppositely; a piston assembly which is arranged in the circulation cavity, the piston assembly having a first sealing end and a second sealing end which are arranged oppositely, the first sealing end being arranged corresponding to the first valve port, the first sealing end being movable relative to the first valve port to block or open the first valve port, the second sealing end being arranged corresponding to the second sealing end, the second sealing end being movable relative to the second valve port to block or open the second valve port; wherein a circulation space for fluid circulation is formed between the outer wall of the piston assembly and the inner wall of the circulation cavity, and the circulation space is symmetrically arranged along the perpendicular midline of the line connecting the first valve port and the second valve port.

[0006] Furthermore, the inner diameter of the circulation cavity near the first valve port gradually increases from the first valve port to the second valve port, and the inner diameter of the circulation cavity near the second valve port gradually decreases from the second valve port to the first valve port.

[0007] Furthermore, the valve body assembly includes a first valve cover, a valve tube, and a second valve cover connected in sequence, the first valve cover forms a first valve port at one end away from the valve tube, the second valve cover forms a second valve port at one end away from the valve tube, the inner diameter of the first valve cover gradually increases in a direction close to one side of the valve tube, and the inner diameter of the second valve cover gradually decreases in a direction away from one side of the valve tube.

[0008] Furthermore, the piston assembly includes a first sealing gasket and a second sealing gasket. The first sealing gasket is arranged on the first sealing end and is used to seal with the inner wall of the first valve cover to seal the first valve port. The second sealing gasket is arranged on the second sealing end and is used to seal with the inner wall of the second valve cover to seal the second valve port.

[0009] Furthermore, the first sealing gasket has a first matching section on the side close to the first valve port, and the diameter of the first matching section gradually increases in the direction away from the first valve port. The second sealing gasket has a second matching section on the side close to the second valve port, and the diameter of the second matching section gradually increases in the direction away from the second valve port.

[0010] Further, the piston assembly includes a first piston and a second piston, the first piston forms a first sealing end at one end facing the first valve port, the second piston forms a second sealing end at one end facing the second valve port, the first piston has a first guide section, the outer diameter of the first guide section gradually increases in the direction away from the first valve port, and the second piston has a second guide section, the outer diameter of the second guide section gradually increases in the direction away from the first valve port.

[0011] Furthermore, the piston assembly also includes a first mounting block and a second mounting block, the first mounting block is fixedly arranged on the first piston, the first sealing gasket is arranged between the first mounting block and the first piston, the second mounting block is fixedly arranged on the second piston, and the second sealing gasket is arranged between the second mounting block and the second piston.

[0012] Further, the outer diameter of the first mounting block gradually increases in a direction away from the first valve port, and the outer diameter of the second mounting block gradually increases in a direction away from the second valve port.

[0013] Furthermore, one end of the first valve port close to the valve pipe, the connection between the first valve cover and the valve pipe, one end of the second valve port close to the valve pipe, and the connection between the second valve cover and the valve pipe are all smoothly transitioned.

[0014] According to another aspect of the utility model, a solenoid valve is provided, and the solenoid valve includes the above-mentioned control valve assembly.

[0015] By applying the technical solution of the utility model, the fluid can circulate through the first valve port and the second valve port at both ends of the circulation chamber, and a circulation space for the fluid to circulate is formed between the outer wall of the piston assembly and the inner wall of the circulation chamber. The first sealing end and the second sealing end of the piston assembly are respectively arranged corresponding to the first valve port and the second valve port to open or cut off the flow path of the fluid from the first valve port to the second valve port, thereby realizing the control of the fluid on and off. In the control valve assembly provided in the present application, the fluid can flow from the first valve port to the second valve port, or from the second valve port to the first valve port. Under the above two flow directions, since the circulation space is symmetrically arranged along the perpendicular midline of the line connecting the first valve port and the second valve port, the flow area change during circulation can be ensured to be consistent with the overall flow resistance regardless of the flow direction of the fluid, thereby ensuring that the flow capacity of the solenoid valve is consistent when the fluid circulates in both directions, thereby improving the use effect of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0017] Figure 1 The structure schematic diagram of the solenoid valve provided by the utility model is shown when the fluid flows from the first connecting pipe to the second connecting pipe and the piston assembly is in a conducting state;

[0018] Figure 2 The structure schematic diagram of the solenoid valve provided by the utility model is shown when the fluid flows from the first connecting pipe to the second connecting pipe and the piston assembly is in a blocking state;

[0019] Figure 3 Shows Figure 1 A partial enlarged view of the middle A;

[0020] Figure 4 The structure schematic diagram of the solenoid valve provided by the utility model is shown when the fluid flows from the second connecting pipe to the first connecting pipe and the piston assembly is in an open state;

[0021] Figure 5 The structure schematic diagram of the solenoid valve provided by the utility model is shown when the fluid flows from the second connecting pipe to the first connecting pipe and the piston assembly is in a blocking state;

[0022] Figure 6 Shows Figure 4 A partial enlarged view of point B in the middle;

[0023] Figure 7 The schematic diagram of the structure of the piston assembly provided by the utility model is shown.

[0024] The above drawings include the following reference numerals:

[0025] 1. First takeover; 2. Second takeover;

[0026] 100, circulation chamber; 200, piston chamber; 300, pilot valve chamber;

[0027] 10. Valve body assembly; 101. First valve port; 102. Second valve port;

[0028] 11. First valve cover; 12. Second valve cover; 13. Valve pipe;

[0029] 20. Piston assembly;

[0030] 21, first piston; 211, first sealing gasket; 2111, first matching section; 212, first mounting boss; 213, first mounting block; 214, first guide section;

[0031] 22, second piston; 221, second sealing gasket; 2211, second matching section; 222, second mounting boss; 223, second mounting block; 224, second guide section;

[0032] 23. Piston sleeve;

[0033] 24. Elastic parts;

[0034] 30. pilot valve assembly; 301. first flow channel; 302. second flow channel;

[0035] 31. First one-way valve; 32. Second one-way valve. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0037] like Figures 1 to 7As shown, an embodiment of the utility model provides a control valve assembly, which includes a valve body assembly 10 and a piston assembly 20. The valve body assembly 10 has a circulation cavity 100, and the valve body assembly 10 has a first valve port 101 and a second valve port 102 that are arranged oppositely. The piston assembly 20 is arranged in the circulation cavity 100, and the piston assembly 20 has a first sealing end and a second sealing end that are arranged oppositely. The first sealing end is arranged corresponding to the first valve port 101, and the first sealing end can move relative to the first valve port 101 to block or open the first valve port 101. The second sealing end is arranged corresponding to the second sealing end, and the second sealing end can move relative to the second valve port 102 to block or open the second valve port 102. A circulation space for fluid circulation is formed between the outer wall of the piston assembly 20 and the inner wall of the circulation cavity 100, and the circulation space is symmetrically arranged along the perpendicular midline of the line connecting the first valve port 101 and the second valve port 102.

[0038] By applying the technical solution of the utility model, the fluid can circulate through the first valve port 101 and the second valve port 102 at both ends of the circulation chamber 100, and a circulation space for the fluid to circulate is formed between the outer wall of the piston assembly 20 and the inner wall of the circulation chamber 100. The first sealing end and the second sealing end of the piston assembly 20 are respectively arranged corresponding to the first valve port 101 and the second valve port 102 to open or cut off the flow path of the fluid from the first valve port 101 to the second valve port 102, so as to realize the control of the fluid on and off. In the control valve assembly provided in the present application, the fluid can flow from the first valve port 101 to the second valve port 102, or flow from the second valve port 102 to the first valve port 101. In the above two flow directions, because the circulation space is symmetrically arranged along the perpendicular midline of the connecting line of the first valve port 101 and the second valve port 102, the fluid can ensure that the flow area change during circulation is consistent with the overall flow resistance regardless of the flow direction, thereby ensuring that the flow capacity of the solenoid valve is consistent when the fluid circulates in both directions, thereby improving the use effect of the solenoid valve.

[0039] Specifically, in the present application, the piston assembly 20 is arranged in the circulation chamber 100 through the fixed assembly, and there is a channel for fluid circulation between the fixed assembly and the inner wall of the circulation chamber 100. In this arrangement, when the fluid flows through the first valve port 101 and the second valve port 102, the fluid in the circulation chamber 100 can circulate through the channel formed between the fixed assembly and the inner wall of the circulation chamber 100. Since the fixed assembly is arranged on the periphery of the piston assembly 20, the fluid can pass through the two ends of the circulation chamber 100 along the periphery of the piston assembly 20. The channel through which the fluid flows does not turn in the circulation direction, and there is no need to avoid the piston assembly 20, and the circulation area of ​​the flow channel is greatly changed. In this way, the flow resistance of the piston assembly 20 to the fluid can be reduced, thereby ensuring the circulation efficiency of the fluid when it flows through the circulation chamber 100.

[0040] Furthermore, the inner diameter of the circulation chamber 100 near the first valve port 101 gradually increases from the first valve port 101 to the second valve port 102, and the inner diameter of the circulation chamber 100 near the second valve port 102 gradually decreases from the second valve port 102 to the first valve port 101. Through the above arrangement, when the fluid enters the circulation chamber 100 through the first valve port 101 or the second valve port 102, the inner wall of the circulation chamber 100 can divert the fluid and reduce the pressure drop to ensure the flow efficiency of the fluid; when the fluid flows out of the circulation chamber 100 through the first valve port 101 or the second valve port 102, the inner wall of the circulation chamber 100 can reduce the flow resistance of the fluid, further ensuring the flow effect of the fluid and reducing the influence of the piston assembly 20 on the flow of the fluid.

[0041] In a specific embodiment of the present application, refer to Figure 1 and Figure 3 As shown, the valve body assembly 10 includes a first valve cover 11, a valve tube 13, and a second valve cover 12 which are connected in sequence. The end of the first valve cover 11 away from the valve tube 13 forms a first valve port 101, and the end of the second valve cover 12 away from the valve tube 13 forms a second valve port 102. The inner diameter of the first valve cover 11 gradually increases in the direction close to the valve tube 13, and the inner diameter of the second valve cover 12 gradually decreases in the direction away from the valve tube 13. By separately processing the first valve cover 11, the valve tube 13, and the second valve cover 12 to form the valve body assembly 10, the processing and molding of the valve body assembly 10 can be facilitated, and the inner diameter change curves of the first valve cover 11 and the second valve cover 12 are ensured to be consistent, thereby ensuring the symmetry of the fluid flow space, improving the processing accuracy of the valve body assembly 10, and facilitating the assembly of the piston assembly 20.

[0042] Specifically, the piston assembly 20 includes a first sealing gasket 211 and a second sealing gasket 221. The first sealing gasket 211 is arranged on the first sealing end and is used to seal with the inner wall of the first valve cover 11 to block the first valve port 101. The second sealing gasket 221 is arranged on the second sealing end and is used to seal with the inner wall of the second valve cover 12 to block the second valve port 102. By providing the first sealing gasket 211 and the second sealing gasket 221, a soft sealing fit can be formed between the piston assembly 20 and the inner walls of the first valve cover 11 and the second valve cover 12, thereby improving the sealing performance of the piston assembly 20.

[0043] Further, the first sealing gasket 211 has a first matching section 2111 on the side close to the first valve port 101, and the diameter of the first matching section 2111 gradually increases in the direction away from the first valve port 101, and the second sealing gasket 221 has a second matching section 2211 on the side close to the second valve port, and the diameter of the second matching section 2211 gradually increases in the direction away from the second valve port 102. Through the above arrangement, when the first matching section 2111 is matched with the first valve port 101, and when the second matching section 2211 is matched with the second valve port 102, the side walls of the first matching section 2111 and the second matching section 2211 can form a sealing surface, increase the sealing area between the first sealing gasket 211 and the first valve port 101 and between the second sealing gasket 221 and the second valve port 102, improve the sealing effect of the first sealing gasket 211 and the second sealing gasket 221, and reduce the internal leakage of the solenoid valve.

[0044] like Figure 7 As shown, further, the piston assembly 20 includes a first piston 21 and a second piston 22, the first piston 21 forms a first sealing end at one end facing the first valve port 101, and the second piston 22 forms a second sealing end at one end facing the second valve port 102, the first piston 21 has a first guide section 214, the outer diameter of the first guide section 214 gradually increases in the direction away from the first valve port 101, and the second piston 22 has a second guide section 224, the outer diameter of the second guide section 224 gradually increases in the direction away from the first valve port 101. Through the above arrangement, the first guide section 214 can guide the fluid flowing into the circulation chamber 100 from the first valve port 101, and the second guide section 224 can guide the fluid flowing into the circulation chamber 100 through the second valve port 102, so as to reduce the flow resistance of the piston assembly 20 to the fluid flowing into the circulation chamber 100, and improve the circulation efficiency of the fluid when passing through the circulation chamber 100.

[0045] Furthermore, the piston assembly 20 further includes a first mounting block 213 and a second mounting block 223, wherein the first mounting block 213 is fixedly disposed on the first piston 21, the first sealing gasket 211 is disposed between the first mounting block 213 and the first piston 21, the second mounting block 223 is fixedly disposed on the second piston 22, and the second sealing gasket 221 is disposed between the second mounting block 223 and the second piston 22. Through the above arrangement, the first sealing gasket 211 and the second sealing gasket 221 can be fixed, and the stability of the installation of the first sealing gasket 211 and the second sealing gasket 221 is ensured. Specifically, a first mounting boss 212 is provided on the side of the first piston 21 close to the first valve port 101, the first sealing gasket 211 and the first mounting block 213 are sleeved on the first mounting boss 212, and the first mounting block 213 is riveted to the end face of the first mounting boss 212 close to the first valve port 101 to fix the first sealing gasket 211; a second mounting boss 222 is provided on the side of the second piston 22 close to the second valve port 102, the second sealing gasket 221 and the second mounting boss 222 are sleeved on the second mounting boss 222, and the second mounting block 223 is riveted to the end face of the second mounting boss 222 close to the second valve port 102 to fix the second sealing gasket 221.

[0046] Furthermore, the outer diameter of the first mounting block 213 gradually increases in the direction away from the first valve port 101, and the outer diameter of the second mounting block 223 gradually increases in the direction away from the second valve port 102. Through the above arrangement, when the fluid flows to the first mounting block 213 through the first valve port 101 and flows to the second mounting block 223 through the second valve port 102, the first mounting block 213 and the second mounting block 223 can guide the fluid, so that the fluid flows evenly to the circulation cavity 100, which is convenient for the circulation of the fluid.

[0047] Specifically, in the present application, the end of the first valve port 101 close to the valve tube 13, the connection between the first valve cover 11 and the valve tube 13, the end of the second valve port 102 close to the valve tube 13, and the connection between the second valve cover 12 and the valve tube 13 are all smoothly transitioned. Such a configuration can minimize the flow resistance of the fluid in the flow cavity 100, make the flow of the fluid smoother, and improve the flow capacity of the solenoid valve.

[0048] According to an embodiment of the present application, a solenoid valve is further provided, the solenoid valve comprising the above-mentioned control valve assembly. By arranging the above-mentioned control valve assembly on the solenoid valve, the flow area change during the flow of the fluid can be ensured to be consistent with the overall flow resistance regardless of the flow direction of the fluid, thereby ensuring that the flow capacity of the solenoid valve is consistent when the fluid flows in both directions, thereby improving the use effect of the solenoid valve.

[0049] Specifically, the first valve port 101 of the valve body assembly 10 is used to connect with the first connecting pipe 1, and the second valve port 102 is used to connect with the second connecting pipe 2. The piston assembly 20 also includes a piston sleeve 23. The first piston 21, the second piston 22 and the inner wall of the piston sleeve 23 cooperate to form a piston chamber 200. The piston assembly 20 has a relatively set conducting state and a blocking state. When the piston assembly 20 is in the blocking state, the first piston 21 moves toward the first valve port 101 to block the first valve port 101, and the second piston 22 moves toward the second valve port 102 to block the second valve port 102; when the piston assembly 20 is in the open state, the first piston 21 avoids the first valve port 101, and the second piston 22 avoids the second valve port 102. The solenoid valve further comprises a pilot valve assembly 30, which is arranged on the valve body assembly 10, and has a pilot valve chamber 300, which is connected to the piston chamber 200. The pilot valve assembly 30 also comprises a first flow channel 301 and a second flow channel 302, wherein one end of the first flow channel 301 is used to be connected to the first connecting pipe 1, and the other end of the first flow channel 301 is connected to the pilot valve chamber 300, and one end of the second flow channel 302 is used to be connected to the second connecting pipe 2, and the other end of the second flow channel 302 is connected to the pilot valve chamber 300. The pilot valve assembly 30 has an open state and a closed state which are relatively arranged. When the pilot valve assembly 30 is in the open state, one of the first flow channel 301 and the second flow channel 302 is connected to the pilot valve chamber 300, and the piston assembly 20 is in the conducting state; when the pilot valve assembly 30 is in the closed state, the pilot valve chamber 300 is not connected to the first flow channel 301 and the second flow channel 302, and the piston assembly 20 is in the blocking state.

[0050] Specifically in the present application, the pilot valve assembly 30 further includes a first one-way valve 31 and a second one-way valve 32. The first one-way valve 31 is arranged on the first flow channel 301, and the first one-way valve 31 is unidirectionally connected from the pilot valve chamber 300 to the direction of the first connecting pipe 1, and the second one-way valve 32 is arranged on the second flow channel 302, and the second one-way valve 32 is unidirectionally connected from the pilot valve chamber 300 to the direction of the second connecting pipe 2. When the pilot valve assembly 30 is switched to the open state, the first one-way valve 31 connects the pilot valve chamber 300 with the first flow channel 301, and the pilot valve chamber 300 is not connected with the second flow channel 302; or, the second one-way valve 32 connects the pilot valve chamber 300 with the second flow channel 302, and the pilot valve chamber 300 is not connected with the first flow channel 301. Through the above arrangement, when the fluid flows from the first connecting pipe 1 to the second connecting pipe 2, after the pilot valve assembly 30 switches to the open state, the first one-way valve 31 is closed, the first flow channel 301 is not connected to the pilot valve chamber 300, the second one-way valve 32 is opened, and the second flow channel 302 can be connected to the pilot valve chamber 300; when the fluid flows from the second connecting pipe 2 to the first connecting pipe 1, after the pilot valve assembly 30 switches to the open state, the second one-way valve 32 is closed, the second flow channel 302 is not connected to the pilot valve chamber 300, the first one-way valve 31 is opened, and the first flow channel 301 can be connected to the pilot valve chamber 300.

[0051] Specifically, an elastic member 24 is further disposed in the piston chamber 200, and the elastic member 24 is disposed between the first piston 21 and the second piston 22. The elastic member 24 can provide an elastic force for the first piston 21 and the second piston 22 to move away from each other. Through the above arrangement, the elastic member 24 can ensure the blocking effect when the piston assembly 20 is in a blocking state, reduce the leakage of the fluid at the first valve port 101 and the second valve port 102, and ensure the use effect of the solenoid valve.

[0052] In a feasible embodiment of the present application, when the solenoid valve switches from a closed state to an open state, the switching action of the piston assembly 20 is as follows:

[0053] Reference Figures 1 to 3 As shown, when the fluid flows from the first connecting pipe 1 to the second connecting pipe 2, the pressure in the first connecting pipe 1 is greater than the pressure in the second connecting pipe 2, the pilot valve assembly 30 is switched to the open state, the first check valve 31 on the first flow channel 301 is closed, the first flow channel 301 is not connected to the pilot valve chamber 300, the second check valve 32 on the second flow channel 302 is opened, the pilot valve chamber 300 is connected to the second flow channel 302, the piston chamber 200 can be connected to the second flow channel 302, the pressure in the piston chamber 200 is reduced, at this time the pressure in the first connecting pipe 1 is greater than the pressure in the piston chamber 200, and the first piston 21 is subjected to the pressure of the first connecting pipe 1. Due to the pressure of the piston chamber 200 and the elastic member 24, the first piston 21 moves away from the first valve port 101, the first valve port 101 opens, the fluid enters the circulation chamber 100, and enters between the second guide section 224 and the second valve cover 12, the side wall at the end of the second piston 22 is subjected to a pressure of the fluid that is greater than the pressure in the piston chamber 200 and the pressure of the elastic member 24, the second piston 22 can move away from the second valve port 102 under the drive of the pressure difference, the second valve port 102 opens, the piston assembly 20 switches to the conducting state, and the fluid can flow from the first connecting pipe 1 to the second connecting pipe 2 through the circulation chamber 100.

[0054] Reference Figures 4 to 6As shown, when the fluid flows from the second connecting pipe 2 to the first connecting pipe 1, the pressure in the second connecting pipe 2 is greater than the pressure in the first connecting pipe 1, the pilot valve assembly 30 is switched to the open state, the second one-way valve 32 on the second flow channel 302 is closed, the first flow channel 301 is not connected to the pilot valve chamber 300, the first one-way valve 31 on the first flow channel 301 is opened, the pilot valve chamber 300 is connected to the first flow channel 301, the piston chamber 200 can be connected to the first flow channel 301, the pressure in the piston chamber 200 is reduced, and at this time the pressure in the second connecting pipe 2 is greater than the pressure in the piston chamber 200, and the second piston 22 is subjected to the pressure of the second connecting pipe 2. Due to the pressure of the piston chamber 200 and the elastic member 24, the second piston 22 moves away from the second valve port 102, the second valve port 102 opens, the fluid enters the circulation chamber 100, and enters between the first guide section 214 and the second valve cover 12, the side wall of the end of the first piston 21 is subjected to a pressure of the fluid that is greater than the pressure in the piston chamber 200 and the pressure of the elastic member 24, the first piston 21 can move away from the first valve port 101 under the drive of the pressure difference, the first valve port 101 opens, the piston assembly 20 switches to the conducting state, and the fluid can flow from the second connecting pipe 2 to the first connecting pipe 1 through the circulation chamber 100.

[0055] Specifically, a balance channel is provided between the piston chamber 200 and the circulation chamber 100 to connect the piston chamber 200 and the circulation chamber 100. Through the above arrangement, the fluid in the circulation chamber 100 can enter the piston chamber 200 through the balance channel, and pass through the piston chamber 200 and the pilot valve chamber 300 to flow to the first flow channel 301 or the second flow channel 302.

[0056] In a feasible embodiment of the present application, when the solenoid valve switches from the open state to the closed state, the switching action of the piston assembly 20 is as follows:

[0057] Reference Figures 1 to 6 As shown, the pilot valve assembly 30 is switched to a closed state, the first flow channel 301 and the second flow channel 302 are not connected to the pilot valve chamber 300, the fluid in the circulation chamber 100 flows into the piston chamber 200 through the balance channel, the pressure in the piston chamber 200 increases, the pressure of the piston chamber 200 on the first piston 21 and the second piston 22 cooperates with the pressure of the elastic member 24 on the first piston 21 and the second piston 22, so that the first piston 21 moves toward the first valve port 101, and the second piston 22 moves toward the second valve port 102, the piston assembly 20 is switched to a blocked state, the first piston 21 blocks the first valve port 101, the second piston 22 blocks the second valve port 102, and the first connecting pipe 1 and the second connecting pipe 2 are not connected to the circulation chamber 100, so as to realize the closing of the solenoid valve.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0059] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0060] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0063] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A control valve assembly, characterized in that: The control valve assembly comprises: A valve body assembly (10) having a flow chamber (100), wherein the valve body assembly (10) has a first valve port (101) and a second valve port (102) arranged opposite to each other; A piston assembly (20) is arranged in the circulation chamber (100), the piston assembly (20) having a first sealing end and a second sealing end arranged opposite to each other, the first sealing end being arranged corresponding to the first valve port (101), the first sealing end being movable relative to the first valve port (101) to block or open the first valve port (101), the second sealing end being arranged corresponding to the second sealing end, the second sealing end being movable relative to the second valve port (102) to block or open the second valve port (102); A circulation space for fluid circulation is formed between the outer wall of the piston assembly (20) and the inner wall of the circulation chamber (100), and the circulation space is symmetrically arranged along the perpendicular midline of the line connecting the first valve port (101) and the second valve port (102).

2. The control valve assembly according to claim 1, characterized in that The inner diameter of the circulation cavity (100) near the first valve port (101) gradually increases from the first valve port (101) to the second valve port (102), and the inner diameter of the circulation cavity (100) near the second valve port (102) gradually decreases from the second valve port (102) to the first valve port (101).

3. The control valve assembly according to claim 2, characterized in that The valve body assembly (10) comprises a first valve cover (11), a valve tube (13) and a second valve cover (12) which are connected in sequence, wherein the first valve cover (11) forms the first valve opening (101) at one end away from the valve tube (13), and the second valve cover (12) forms the second valve opening (102) at one end away from the valve tube (13), and the inner diameter of the first valve cover (11) gradually increases in a direction close to one side of the valve tube (13), and the inner diameter of the second valve cover (12) gradually decreases in a direction away from one side of the valve tube (13).

4. The control valve assembly according to claim 3, characterized in that The piston assembly (20) comprises a first sealing gasket (211) and a second sealing gasket (221), wherein the first sealing gasket (211) is arranged on the first sealing end and is used to cooperate with the inner wall of the first valve cover (11) in a sealing manner to seal the first valve port (101), and the second sealing gasket (221) is arranged on the second sealing end and is used to cooperate with the inner wall of the second valve cover (12) in a sealing manner to seal the second valve port (102).

5. The control valve assembly according to claim 4, characterized in that The first sealing gasket (211) has a first fitting section (2111) on a side close to the first valve port (101), and the diameter of the first fitting section (2111) gradually increases in a direction away from the first valve port (101); the second sealing gasket (221) has a second fitting section (2211) on a side close to the second valve port, and the diameter of the second fitting section (2211) gradually increases in a direction away from the second valve port (102).

6. The control valve assembly according to claim 4, characterized in that The piston assembly (20) comprises a first piston (21) and a second piston (22), wherein the first piston (21) has one end facing the first valve port (101) to form the first sealing end, and the second piston (22) has one end facing the second valve port (102) to form the second sealing end, the first piston (21) has a first guide section (214), the outer diameter of the first guide section (214) gradually increases in a direction away from the first valve port (101), and the second piston (22) has a second guide section (224), the outer diameter of the second guide section (224) gradually increases in a direction away from the first valve port (101).

7. The control valve assembly according to claim 6, characterized in that The piston assembly (20) further comprises a first mounting block (213) and a second mounting block (223); the first mounting block (213) is fixedly arranged on the first piston (21); the first sealing gasket (211) is arranged between the first mounting block (213) and the first piston (21); the second mounting block (223) is fixedly arranged on the second piston (22); the second sealing gasket (221) is arranged between the second mounting block (223) and the second piston (22).

8. The control valve assembly according to claim 7, characterized in that The outer diameter of the first mounting block (213) gradually increases in a direction away from the first valve port (101), and the outer diameter of the second mounting block (223) gradually increases in a direction away from the second valve port (102).

9. The control valve assembly according to claim 3, characterized in that: An end of the first valve opening (101) close to the valve tube (13), a connection between the first valve cover (11) and the valve tube (13), an end of the second valve opening (102) close to the valve tube (13), and a connection between the second valve cover (12) and the valve tube (13) are all smoothly transitioned.

10. A solenoid valve, characterized in that: The solenoid valve comprises the control valve assembly according to any one of claims 1 to 9.

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