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, the control valve assembly comprises a pilot valve assembly, the pilot valve assembly is provided with a pilot valve cavity, a pilot valve port and a connecting channel, and the connecting channel is communicated with the pilot valve cavity through the pilot valve port; the one-way valve comprises a one-way valve seat and a one-way valve core, the one-way valve seat is arranged on the pilot valve assembly, the one-way valve seat is provided with an opening, a one-way valve port is formed between the one-way valve seat and the connecting channel, and the one-way valve core is movably arranged in the one-way valve seat to block or open the one-way valve port; the opening is communicated with the pilot valve port through the one-way valve port. According to the technical scheme provided by the utility model, the problem of poor working stability of the electromagnetic valve caused by a one-way valve structure in the prior art 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 and off of fluids.

[0003] In the existing solenoid valve, the solenoid valve usually includes a valve body assembly, a piston assembly and a pilot valve assembly. The valve body assembly is used to connect with the pipeline of the system. The pilot valve assembly is arranged on the valve body assembly, and is used to control the piston assembly to block or open the valve port of the valve body assembly to realize the control function of the solenoid valve. The existing pilot valve assembly is provided with a pilot valve cavity, and the pilot valve cavity is connected to the system pipeline and the piston cavity of the piston assembly respectively, and is used to control the pressure inside the piston cavity to realize the motion state of the control piston assembly. At present, a one-way valve structure is usually arranged between the pilot valve cavity and the system pipeline to control the flow direction of the fluid. The one-way valve structure has a valve core and a valve port, and the valve core can block or open the valve port under the drive of the fluid to realize one-way conduction. However, the existing one-way valve structure is usually arranged on the piston assembly, so that the one-way valve assembly is also prone to unstable movement of the valve core during the movement of the piston assembly, and the cooperation between the valve core and the valve port is unstable, and even the valve core is stuck, resulting in the failure of the one-way conduction ability of the one-way valve, 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 that the one-way valve structure in the prior art leads to poor working stability of the solenoid valve.

[0005] According to one aspect of the utility model, a control valve assembly is provided, which includes: a pilot valve assembly, the pilot valve assembly having a pilot valve cavity, a pilot valve port and a connecting channel, the connecting channel being connected to the pilot valve cavity through the pilot valve port; a one-way valve, including a one-way valve seat and a one-way valve core, the one-way valve seat being arranged on the pilot valve assembly, the one-way valve seat having an opening, a one-way valve port being formed between the one-way valve seat and the connecting channel, the one-way valve core being movably arranged in the one-way valve seat to block or open the one-way valve port, and when the one-way valve port is opened, the opening is connected to the pilot valve port through the one-way valve port.

[0006] Furthermore, the one-way valve seat has a first end and a second end arranged opposite to each other, the one-way valve port is located at the second end, and the opening is arranged on the side wall of the one-way valve seat. When the one-way valve port is opened, the one-way valve core is located at the first end of the one-way valve seat.

[0007] Furthermore, there are a plurality of openings, and the plurality of openings are distributed on the side wall of the one-way valve seat at annular intervals.

[0008] Furthermore, the outer diameter of the one-way valve core is matched with the inner diameter of the one-way valve seat.

[0009] Furthermore, the pilot valve assembly also includes a pilot valve seat, a connecting hole is provided on the pilot valve seat, the connecting hole forms a connecting channel, the one-way valve port is connected with the pilot valve cavity through the connecting hole, and a mounting hole is also provided on the pilot valve seat, the mounting hole and the connecting hole are connected with each other, the one-way valve is inserted in the mounting hole, and a step surface is provided between the mounting hole and the connecting hole, and one end of the one-way valve seat abuts against the step surface.

[0010] Further, a port of the connecting hole close to the one-way valve seat forms a one-way valve port.

[0011] Furthermore, a one-way valve port is provided at the second end of the one-way valve seat.

[0012] Furthermore, a side of the one-way valve seat away from the one-way valve port has a limiting section, the inner diameter of the limiting section gradually decreases from the second end to the first end, and the limiting section is used to limit the movement of the one-way valve core away from the one-way valve port.

[0013] Furthermore, the limiting section is formed by an extrusion process.

[0014] Furthermore, the one-way valve seat is connected to the pilot valve assembly by welding.

[0015] According to another aspect of the utility model, a solenoid valve is provided, and the solenoid valve includes the above-mentioned control valve assembly.

[0016] By applying the technical solution of the utility model, the one-way valve core is movably arranged in the one-way valve seat. When the fluid pushes the one-way valve core to block the one-way valve port, the fluid cannot flow to the connecting channel through the one-way valve seat; when the fluid pushes the one-way valve core away from the one-way valve port and the one-way valve port is opened, the fluid can flow out of the opening of the one-way valve through the connecting channel, so that the one-way conduction function of the one-way valve can be achieved. The present application can ensure the coordination stability between the one-way valve core and the one-way valve port by arranging the one-way valve port between the one-way valve seat and the connecting channel, and prevent the one-way valve core from moving with the piston assembly in the state of blocking the one-way valve port and moving in the direction away from the one-way valve port. At the same time, it can also prevent the one-way valve core from moving too much in the direction of the one-way valve port, causing the one-way valve core to be stuck, thereby ensuring the stability of the one-way valve movement, and thereby ensuring the use effect of the control valve assembly and the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] 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:

[0018] Figure 1The structure diagram of the control valve assembly provided by the utility model is shown;

[0019] Figure 2 Shows Figure 1 A partial enlarged view of the middle A;

[0020] Figure 3 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;

[0021] Figure 4 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;

[0022] Figure 5 Shows Figure 3 A partial enlarged view of point B in the middle;

[0023] Figure 6 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;

[0024] Figure 7 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;

[0025] Figure 8 Shows Figure 6 A partial enlarged view of point C in the middle;

[0026] Fig. 9 The schematic diagram of the structure of the pilot valve seat provided by the utility model is shown.

[0027] The above drawings include the following reference numerals:

[0028] 03, one-way valve; 031, one-way valve seat; 032, one-way valve core; 033, one-way valve port; 034, opening; 035, limit section;

[0029] 1. First takeover; 2. Second takeover;

[0030] 100, circulation chamber; 200, piston chamber; 300, pilot valve chamber;

[0031] 10. Valve body assembly; 101. First valve port; 102. Second valve port;

[0032] 20. Piston assembly;

[0033] 21. first piston; 22. second piston; 23. piston sleeve; 24. elastic member;

[0034] 30. pilot valve assembly; 301. first flow channel; 302. second flow channel; 303. pilot valve port;

[0035] 31. first one-way valve; 311. first one-way valve core; 312. first one-way valve seat; 313. first one-way valve port;

[0036] 32. Second one-way valve; 321. Second one-way valve core; 322. Second one-way valve seat; 323. Second one-way valve port;

[0037] 33. Shell;

[0038] 34. Pilot valve seat; 35. Valve core assembly; 36. First communicating hole; 37. Second communicating hole. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figure 1 and Figure 2 As shown, the embodiment of the utility model provides a control valve assembly, which includes a pilot valve assembly 30 and a one-way valve 03. The pilot valve assembly 30 has a pilot valve cavity 300, a pilot valve port 303 and a connecting channel, and the connecting channel is connected to the pilot valve cavity 300 through the pilot valve port 303. The one-way valve 03 includes a one-way valve seat 031 and a one-way valve core 032. The one-way valve seat 031 is arranged on the pilot valve assembly 30. The one-way valve seat 031 has an opening 034. A one-way valve port 033 is formed between the one-way valve seat 031 and the connecting channel. The one-way valve core 032 is movably arranged in the one-way valve seat 031 to block or open the one-way valve port 033. When the one-way valve port 033 is opened, the opening 034 is connected to the pilot valve port 303 through the one-way valve port 033.

[0041] By applying the technical solution of the utility model, the one-way valve core 032 is movably arranged in the one-way valve seat 031. When the fluid pushes the one-way valve core 032 to block the one-way valve port 033, the fluid cannot flow to the connecting channel through the one-way valve seat 031; when the fluid pushes the one-way valve core 032 away from the one-way valve port 033 and the one-way valve port 033 opens, the fluid can flow out of the opening 034 of the one-way valve 03 through the connecting channel, thereby realizing the one-way conduction function of the one-way valve 03. The present application ensures the matching stability between the one-way valve core 032 and the one-way valve port 033 by setting the one-way valve port 033 between the one-way valve seat 031 and the connecting channel, and prevents the one-way valve core 032 from moving with the piston assembly and moving away from the one-way valve port 033 when the one-way valve port 033 is blocked. At the same time, it can also prevent the one-way valve core 032 from moving too much in the direction of the one-way valve port 033 and causing the one-way valve core 032 to get stuck, thereby ensuring the stability of the movement of the one-way valve 03 and further ensuring the use effect of the control valve assembly and the solenoid valve.

[0042] Specifically in the present application, the one-way valve seat 031 has a first end and a second end that are relatively arranged, the one-way valve port 033 is located at the second end, the first end of the one-way valve seat 031 can allow fluid to flow into the one-way valve seat 031, and the opening 034 is arranged on the side wall of the one-way valve seat 031. When the one-way valve port 033 is opened, the one-way valve core 032 is located at the first end of the one-way valve seat 031. Through the above-mentioned arrangement, when the flow direction of the fluid is from the second end to the first end, the one-way valve core 032 will move toward the first end driven by the fluid, and the one-way valve core 032 can at least partially avoid the opening 034, so that the opening 034 can be connected with the one-way valve port 033; when the flow direction of the fluid is from the first end to the second end, the one-way valve core 032 will move toward the second end driven by the fluid, and the one-way valve core 032 blocks the one-way valve port 033, and the opening 034 cannot be connected with the one-way valve port 033, so as to realize the one-way conduction function of the one-way valve 03.

[0043] Furthermore, there are multiple openings 034, and the multiple openings 034 are distributed at annular intervals on the side wall of the one-way valve seat 031. Through the above arrangement, the multiple openings 034 can ensure the flow capacity of the one-way valve 03, and the multiple openings 034 are arranged at annular intervals on the side wall of the one-way valve seat 031, which can also ensure the structural strength of the one-way valve seat 031 and reduce the risk of deformation of the one-way valve seat 031 under the impact of the one-way valve core 032, compared with the structure with only a single opening 034.

[0044] Specifically in the present application, the outer diameter of the one-way valve core 032 is matched with the inner diameter of the one-way valve seat 031. Through the above arrangement, the force of the fluid on the one-way valve core 032 can be ensured in the process of the fluid driving the one-way valve core 032 to move, thereby improving the sensitivity of the one-way valve core 032 response and improving the use effect of the one-way valve 03. Specifically, the outer diameter of the one-way valve core 032 is matched with the inner diameter of the one-way valve seat 031, that is, the one-way valve core 032 and the one-way valve seat 031 are clearance-matched, the one-way valve core 032 is movably arranged in the one-way valve seat 031, and the one-way valve core 032 can move under the drive of the fluid.

[0045] Specifically, the one-way valve core 032 can be configured as a sealing ball to reduce the friction between the one-way valve core 032 and the one-way valve seat 031 , thereby further improving the movement effect of the one-way valve core 032 .

[0046] Specifically in the present application, the pilot valve assembly 30 also includes a pilot valve seat 34, a connecting hole is provided on the pilot valve seat 34, the connecting hole forms a connecting channel, the one-way valve port 033 is connected to the pilot valve cavity 300 through the connecting hole, and a mounting hole is also provided on the pilot valve seat 34, the mounting hole and the connecting hole are connected to each other, the one-way valve 03 is inserted in the mounting hole, there is a stepped surface between the mounting hole and the connecting hole, and one end of the one-way valve seat 031 abuts against the stepped surface. Through the above-mentioned arrangement, the one-way valve 03 is inserted in the mounting hole to ensure the stability of the one-way valve 03 fixed on the pilot valve seat 34, and the stepped surface can limit the installation of the one-way valve 03, ensuring that the one-way valve 03 can be installed in place, which is convenient for the overall assembly of the control valve assembly.

[0047] In a specific implementation of the present application, the connection hole is close to the port of the one-way valve seat 031 to form a one-way valve port 033. This arrangement can simplify the structure of the one-way valve seat 031, facilitate the processing and forming of the one-way valve seat 031, reduce the overall processing requirements for the one-way valve seat 031, and reduce the processing difficulty and processing cost.

[0048] Specifically, a chamfered structure may be provided at the end of the one-way valve port 033 to reduce the wear of the one-way valve core 032 and increase the service life of the one-way valve 03 .

[0049] In another embodiment of the present application, a one-way valve port 033 is provided at the second end of the one-way valve seat 031. Specifically in this embodiment, the inner diameter of the one-way valve port 033 is smaller than the inner diameter of the one-way valve seat 031, and the one-way valve port 033 is formed at one end of the one-way valve seat 031 for fluid circulation. Through the above arrangement, the structural integrity of the one-way valve 03 is high, and during the installation process, the one-way valve core 032 is not easy to fall off, which can ensure the installation effect of the first one-way valve 31 and the second one-way valve 32.

[0050] Furthermore, the one-way valve seat 031 has a limiting section 035 on one side away from the one-way valve port 033, and the inner diameter of the limiting section 035 gradually decreases in the direction from the second end to the first end, and the limiting section 035 is used to limit the movement of the one-way valve core 032 away from the one-way valve port 033. Specifically, the limiting section 035 can be set in the form of a tapered section, and the inner diameter of the tapered section gradually decreases in the direction away from the one-way valve port 033, so as to have a limiting effect on the one-way valve core 032.

[0051] Specifically, the port of the limiting section 035 away from the one-way valve port 033 is not closed, so that the fluid can enter the one-way valve seat 031 .

[0052] In some feasible implementations of the present application, the limiting section 035 is formed by an extrusion process. In addition, by processing the one-way valve seat 031 to form a limiting structure, the integrity of the one-way valve 03 can be improved, and the structural stability of the one-way valve 03 during operation can be ensured.

[0053] Specifically, the one-way valve seat 031 is connected to the pilot valve assembly 30 by welding. Through the above arrangement, the connection strength between the one-way valve seat 031 and the pilot valve assembly 30 can be ensured, and the one-way valve seat 031 is prevented from falling off under the impact of the one-way valve core 032.

[0054] According to an embodiment of the present application, a solenoid valve is provided, and the solenoid valve includes the above-mentioned control valve assembly. By setting the above-mentioned control valve assembly, the matching stability between the one-way valve core 032 and the one-way valve port 033 can be ensured during the operation of the solenoid valve, and the one-way valve core 032 is prevented from moving with the piston assembly and moving away from the one-way valve port 033 when the one-way valve core 032 is blocking the one-way valve port 033. At the same time, the one-way valve core 032 can be prevented from moving too much in the direction of the one-way valve port 033, causing the one-way valve core 032 to be stuck, thereby ensuring the stability of the movement of the one-way valve 03, and thereby ensuring the use effect of the control valve assembly and the solenoid valve.

[0055] Specifically in the solenoid valve provided in this application, refer to Figures 3 to 8As shown, the solenoid valve further includes a valve body assembly 10 and a piston assembly 20. The valve body assembly 10 has a circulation chamber 100. The circulation chamber 100 has a first valve port 101 and a second valve port 102 arranged oppositely. The first valve port 101 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 first connecting pipe 1 and the second connecting pipe 2 are used to access the system pipeline for fluid circulation. The piston assembly 20 is movably arranged in the circulation chamber 100. The piston assembly 20 has a piston chamber 200. The piston assembly 20 has a relatively arranged conducting state and a blocking state. When the piston assembly 20 is in the blocking state, it can block the first valve port 101 and the second valve port 102. When the piston assembly 20 is in the conducting state, it can make the first connecting pipe 1 communicate with the second connecting pipe 2 through the circulation chamber 100. The pilot valve assembly 30 is arranged on the valve body assembly 10, and the pilot valve chamber 300 of the pilot valve assembly 30 is connected with the piston chamber 200. The pilot valve assembly 30 also has a first flow channel 301 and a second flow channel 302. One end of the first flow channel 301 is used to communicate with the first connecting pipe 1, and the other end of the first flow channel 301 is connected with the pilot valve chamber 300. One end of the second flow channel 302 is used to communicate with the second connecting pipe 2, and the other end of the second flow channel 302 is connected with the pilot valve chamber 300. The pilot valve assembly 30 has an open state and a closed state that are relatively set. 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 with 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 with the first flow channel 301 and the second flow channel 302, and the piston assembly 20 is in the blocking state, so as to realize the function of the solenoid valve controlling the fluid on and off.

[0056] In the solenoid valve provided in the present application, the pilot valve assembly 30 further includes a housing 33, a pilot valve seat 34 and a valve core assembly 35. The pilot valve seat 34 is arranged on the valve body assembly 10, and the pilot valve seat 34 and the housing 33 cooperate to form a pilot valve cavity 300, and a pilot valve port 303 is arranged on the pilot valve seat 34, and the first flow channel 301 and the second flow channel 302 are connected to the pilot valve cavity 300 through the pilot valve port 303. The valve core assembly 35 is movably arranged in the pilot valve cavity 300, and the valve core assembly 35 can block or open the pilot valve port 303, so that the pilot valve assembly 30 is switched between an open state and a closed state.

[0057] Specific as Fig. 9As shown, the one-way valve 03 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 one-way connected from the pilot valve chamber 300 to the direction of the first connecting pipe 1. The second one-way valve 32 is arranged on the second flow channel 302, and the second one-way valve 32 is one-way connected from the pilot valve chamber 300 to the direction of the second connecting pipe 2. The first one-way valve 31 and the second one-way valve 32 are both connected to the pilot valve chamber 300 through the pilot valve port 303. The connecting hole is arranged on the pilot valve seat 34. The connecting hole includes a first connecting hole 36 and a second connecting hole 37 that are connected to each other. One end of the first connecting hole 36 forms the pilot valve port 303, and the other end of the first connecting hole 36 is connected to the side wall of the second connecting hole 37. The two opposite ends of the second connecting hole 37 are respectively connected to the first one-way valve 31 and the second one-way valve 32. The first one-way valve 31 has a first one-way valve core 311 and a first one-way valve seat 31 2. The outer diameter of the first one-way valve core 311 is matched with the inner diameter of the first one-way valve seat 312, and a first one-way valve port 313 is formed between the first one-way valve seat 312 and the second connecting hole 37. The second one-way valve 32 has a second one-way valve core 321 and a second one-way valve seat 322. The outer diameter of the second one-way valve core 321 is matched with the inner diameter of the second one-way valve seat 322, and a second one-way valve port 323 is formed between the second one-way valve seat 322 and the second connecting hole 37. The one-way conduction directions of the first one-way valve 31 and the second one-way valve 32 are opposite.

[0058] Through the above arrangement, when the pilot valve assembly is in an open state, when the flow direction of the fluid is from the first connecting pipe 1 to the second connecting pipe 2, the first one-way valve core 311 can be pushed by the fluid to move in the direction of the first one-way valve port 313 to block the first one-way valve port 313, and the second one-way valve core 321 can be driven by the fluid in the second connecting hole 37 to move in the direction away from the second one-way valve port 323 to open the second one-way valve port 323; when the flow direction of the fluid is from the second connecting pipe 2 to the first connecting pipe 1, the second one-way valve core 321 can be pushed by the fluid to move in the direction of the second one-way valve port 323 to block the second one-way valve port 323, and the first one-way valve core 311 can be driven by the fluid in the second connecting hole 37 to move in the direction away from the first one-way valve port 313 to open the first one-way valve port 313. In this way, the one-way conduction function of the first one-way valve 31 and the second one-way valve 32 is realized, and then under the premise of bidirectional flow of the fluid, one of the first flow channel 301 and the second flow channel 302 can be connected to the pilot valve chamber 300, so that the piston assembly 20 is in a conducting state.

[0059] Furthermore, a connection structure may be provided between the first one-way valve core 311 and the second one-way valve core 321 , thereby improving the synchronization and consistency of the movements of the first one-way valve core 311 and the second one-way valve core 321 .

[0060] Specifically in this application, refer to Figure 3 As shown, the piston assembly 20 includes a first piston 21, a second piston 22, a piston sleeve 23 and an elastic member 24. The piston sleeve 23 is arranged in the circulation cavity 100, and the first piston 21 and the second piston 22 are both movably arranged in the piston sleeve 23. The end of the first piston 21 away from the second piston 22 forms a first sealing end, and the first end of the second piston 22 away from the first piston 21 forms a second sealing end. The first piston 21, the second piston 22 and the inner wall of the piston sleeve 23 cooperate to form a piston cavity 200. The elastic member 24 is arranged between the first piston 21 and the second piston 22, and the elastic member 24 can provide the first piston 21 and the second piston 22 with an elastic force 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.

[0061] In 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:

[0062] Reference Figures 3 to 5 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, the first piston 21 is The pressure to the first connecting pipe 1 is greater than the pressure in 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, the side wall at the end of the second piston 22 is subjected to a pressure of the fluid 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 driven by 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.

[0063] Reference Figures 6 to 8As 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 cavity 300, the first one-way valve 31 on the first flow channel 301 is opened, the pilot valve cavity 300 is connected to the first flow channel 301, the piston cavity 200 can be connected to the first flow channel 301, the pressure in the piston cavity 200 is reduced, and at this time the pressure in the second connecting pipe 2 is greater than the pressure in the piston cavity 200, and the second piston 22 is The pressure to the second connecting pipe 2 is greater than the pressure in 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, the side wall at the end of the first piston 21 is subjected to a pressure of the fluid 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 driven by 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.

[0064] 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.

[0065] In the present application, when the solenoid valve switches from an open state to a closed state, the switching action of the piston assembly 20 is as follows:

[0066] Reference Figures 3 to 8 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.

[0067] Specifically, the minimum flow area of ​​the balancing channel is respectively smaller than the minimum flow area of ​​the first one-way valve 31 and the second one-way valve 32. Through the above arrangement, the flow capacity of the balancing channel at the minimum flow area is smaller than the flow capacity when the first one-way valve 31 and the second one-way valve 32 are opened. When the piston assembly 20 is in the conducting state, the pressure of the piston chamber 200 is reduced, and the pressure in the piston chamber 200 is smaller than the pressure in the flow chamber 100. The first piston 21 and the second piston 22 will not move under the push of the elastic force of the elastic member 24, so as to ensure the stable operation of the solenoid valve.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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 pilot valve assembly (30), the pilot valve assembly (30) comprising a pilot valve cavity (300), a pilot valve port (303) and a connecting channel, the connecting channel being in communication with the pilot valve cavity (300) via the pilot valve port (303); The one-way valve (03) comprises a one-way valve seat (031) and a one-way valve core (032), wherein the one-way valve seat (031) is arranged on the pilot valve assembly (30), the one-way valve seat (031) has an opening (034), a one-way valve port (033) is formed between the one-way valve seat (031) and the connecting channel, and the one-way valve core (032) is movably arranged in the one-way valve seat (031) to block or open the one-way valve port (033), and when the one-way valve port (033) is opened, the opening (034) is connected to the pilot valve port (303) through the one-way valve port (033).

2. The control valve assembly according to claim 1, characterized in that The one-way valve seat (031) has a first end and a second end that are arranged opposite to each other, the one-way valve port (033) is located at the second end, and the opening (034) is arranged on the side wall of the one-way valve seat (031). When the one-way valve port (033) is opened, the one-way valve core (032) is located at the first end of the one-way valve seat (031).

3. The control valve assembly according to claim 2, characterized in that There are a plurality of openings (034), and the plurality of openings (034) are distributed on the side wall of the one-way valve seat (031) at annular intervals.

4. The control valve assembly according to claim 1, characterized in that The outer diameter of the one-way valve core (032) is matched with the inner diameter of the one-way valve seat (031).

5. The control valve assembly according to claim 2, characterized in that: The pilot valve assembly (30) further comprises a pilot valve seat (34), a connecting hole being provided on the pilot valve seat (34), the connecting hole forming the connecting channel, the one-way valve port (033) being connected to the pilot valve cavity (300) via the connecting hole, a mounting hole being further provided on the pilot valve seat (34), the mounting hole being connected to the connecting hole, the one-way valve (03) being inserted into the mounting hole, a stepped surface being provided between the mounting hole and the connecting hole, and one end of the one-way valve seat (031) being in contact with the stepped surface.

6. The control valve assembly according to claim 5, characterized in that The end of the connecting hole close to the one-way valve seat (031) forms the one-way valve port (033).

7. The control valve assembly according to claim 5, characterized in that The second end of the one-way valve seat (031) is provided with the one-way valve port (033).

8. The control valve assembly according to claim 2, characterized in that The one-way valve seat (031) has a limiting section (035) on the side away from the one-way valve port (033), and the inner diameter of the limiting section (035) gradually decreases along the direction from the second end to the first end. The limiting section (035) is used to limit the movement of the one-way valve core (032) away from the one-way valve port (033).

9. The control valve assembly according to claim 8, characterized in that The limiting section (035) is formed by an extrusion process.

10. The control valve assembly according to claim 1, characterized in that The one-way valve seat (031) is connected to the pilot valve assembly (30) by welding.

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

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