Electromagnetic valve and air conditioning system

Abstract

The utility model relates to the technical field of electromagnetic valves, in particular to an electromagnetic valve and an air conditioning system. The electromagnetic valve comprises a valve body assembly, a valve element assembly and an element iron assembly, the valve body assembly is provided with a valve cavity and a valve port communicated with the valve cavity, and the valve element assembly is movably installed in the valve cavity so as to open or close the valve port. The core iron assembly is installed in the valve cavity, located on the side, away from the valve port, of the valve element assembly and used for driving the valve element assembly to move. A circulation groove is formed in one or both of the end face of the end, close to the valve element assembly, of the core iron assembly and the end face of the end, close to the core iron assembly, of the valve element assembly, and the circulation groove communicates with the valve cavity. According to the electromagnetic valve and the air conditioning system, the problem that a valve element and a static iron core of an existing electromagnetic valve are not prone to being separated is solved.

Description

Technical Field

[0001] This application relates to the technical field of solenoid valves, and particularly to a solenoid valve and an air conditioning system. Background Art

[0002] A solenoid valve is an element controlled by electricity magnetism and is mainly used to control the on-off of fluids. Currently, in a normally open solenoid valve, a static iron core is disposed on one side of a moving iron core close to the valve port, and a push rod penetrating the static iron core is connected to the moving iron core. When the solenoid valve is powered on, the moving iron core moves towards the static iron core and drives the push rod to move. Since the push rod abuts against the valve core, the push rod can synchronously push the valve core to move to close the valve port. When the solenoid valve is powered off, the valve core moves to fit with the static iron core, thereby opening the valve port.

[0003] However, when the solenoid valve operates normally, the valve core and the static iron core are in a fitting state, and affected by the refrigerant pressure in the valve cavity where the valve core is located, the fitting between the valve core and the static iron core is closer. Therefore, when the solenoid valve is just powered on, the adhesion force between the static iron core and the valve core is large, resulting in difficulty for the valve core to separate from the static iron core, thus greatly reducing the closing efficiency of the solenoid valve. Summary of the Utility Model

[0004] Based on this, it is necessary to provide a solenoid valve and an air conditioning system to solve the problem that it is difficult for the valve core of the existing solenoid valve to separate from the static iron core.

[0005] This application provides a solenoid valve, which includes a valve body assembly, a valve core assembly, and an iron core assembly. The valve body assembly is provided with a valve cavity and a valve port communicating with the valve cavity. The valve core assembly is movably installed in the valve cavity to open or close the valve port. The iron core assembly is installed in the valve cavity and is located on the side of the valve core assembly away from the valve port for driving the valve core assembly to move. Wherein, a flow groove is opened on one or both of the end face of the iron core assembly close to the valve core assembly and the end face of the valve core assembly close to the iron core assembly, and the flow groove communicates with the valve cavity.

[0006] In one embodiment, the number of the flow grooves is multiple, and the multiple flow grooves are arranged at intervals along the circumferential direction of the iron core assembly.

[0007] In one embodiment, the flow groove is a cutting formed structure.

[0008] In one embodiment, the core iron assembly includes a moving iron core, a static iron core, and a push rod. The static iron core is connected to the valve body assembly in a limited manner. The moving iron core is movably disposed on a side of the static iron core away from the valve core assembly. One end of the push rod is connected to the moving iron core, and the other end passes through the static iron core and abuts against the valve core assembly. Moreover, as the moving iron core moves toward the static iron core, the push rod can push the valve core assembly to move synchronously to close the valve port. Wherein, the flow channel is formed on an end face of the static iron core close to the valve core assembly.

[0009] In one embodiment, the valve core assembly includes a main valve core, an elastic support member, and a sealing gasket. An assembly hole is formed in the main valve core. The elastic support member and the sealing gasket are both installed in the assembly hole in a limited manner. One end of the elastic support member abuts against the bottom wall of the assembly hole away from the valve port, and the other end is connected to and applies force to the sealing gasket. Wherein, the flow channel is formed on an end face of the main valve core close to the static iron core.

[0010] In one embodiment, the valve body assembly includes a main valve body and a conduit. One end of the conduit is inserted into the main valve body and connected to the main valve body. Wherein, one end of the static iron core close to the valve core assembly protrudes away from its own axis to form a first step. A second step is provided on the inner wall of the main valve body. Along the axial direction of the static iron core, one end of the first step abuts against the second step, and the other end abuts against the end face of the conduit.

[0011] In one embodiment, the outer wall of the conduit and the inner wall of the main valve body are in interference fit.

[0012] In one embodiment, the static iron core and the conduit are welded by high-frequency welding or laser welding.

[0013] In one embodiment, the solenoid valve further includes a sealing head, and the sealing head seals one end of the conduit away from the valve core assembly.

[0014] In one embodiment, the core iron assembly further includes a first elastic member. One end of the first elastic member is connected to the sealing head, and the other end is connected to the moving iron core.

[0015] This application also provides an air-conditioning system, and this air-conditioning system includes the solenoid valve described in any one of the above embodiments.

[0016] Compared with the prior art, for the solenoid valve and the air-conditioning system provided in the present application, when the solenoid valve is in the open state, the armature assembly and the spool assembly are in contact with each other. By providing a flow groove communicating with the valve cavity on the armature assembly and / or the spool assembly, the present application can balance the pressure at the contact between the spool assembly and the armature assembly through the flow groove, thereby reducing the contact force generated when the two are in contact. Therefore, when the armature assembly is energized to drive the spool assembly to move, the driving difficulty of the spool assembly can be effectively reduced, the response speed of the spool assembly can be improved, and thus the closing efficiency of the solenoid valve can be greatly improved. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 A cross-sectional view of a solenoid valve according to an embodiment provided by the present application;

[0019] Figure 2 is Figure 1 an enlarged view of part A in

[0020] Figure 3 a bottom view of a stationary iron core according to an embodiment provided by the present application.

[0021] The meanings of the symbols in the drawings are as follows:

[0022] 100, solenoid valve; 10, valve body assembly; 101, valve cavity; 102, valve port; 11, main valve body; 111, second step; 12, conduit; 20, spool assembly; 201, assembly hole; 21, main spool; 22, second elastic member; 23, elastic support member; 24, gasket; 30, armature assembly; 301, flow groove; 31, moving iron core; 32, stationary iron core; 321, first step; 33, ejector rod; 34, first elastic member; 40, head. Detailed Embodiments

[0023] In order to make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe the detailed embodiments of the present application in conjunction with the drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0024] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of this application are only for illustrative purposes and do not represent the only implementation.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] In this application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0027] Unless otherwise defined, all technical and scientific terms used in the description of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the description of this application includes any and all combinations of one or more of the related listed items.

[0028] A solenoid valve is an element controlled by electromagnetic force and is mainly used to control the on / off of fluid. Currently, in a normally open solenoid valve, a static iron core is disposed on one side of a moving iron core close to the valve port, and a push rod penetrating the static iron core is connected to the moving iron core. When the solenoid valve is powered on, the moving iron core moves towards the static iron core and drives the push rod to move. Since the push rod abuts against the valve core, the push rod can synchronously push the valve core to move to close the valve port. When the solenoid valve is powered off, the valve core moves to fit with the static iron core, thereby opening the valve port.

[0029] However, when the solenoid valve operates normally, the spool and the static iron core are in a fitting state, and affected by the refrigerant pressure in the valve cavity where the spool is located, the fitting between the spool and the static iron core is tighter. Therefore, when the solenoid valve is just powered on, the adhesion force between the static iron core and the spool is large, resulting in difficulty for the spool to separate from the static iron core, thus greatly reducing the closing efficiency of the solenoid valve.

[0030] Please refer to Figures 1 - 3 , to solve the problem that it is not easy for the spool and the static iron core of the existing solenoid valve to separate, the present application provides a solenoid valve 100. The solenoid valve 100 includes a valve body assembly 10, a spool assembly 20, and an iron core assembly 30. The valve body assembly 10 is provided with a valve cavity 101 and a valve port 102 communicating with the valve cavity 101. The spool assembly 20 is movably installed in the valve cavity 101 to open or close the valve port 102. The iron core assembly 30 is installed in the valve cavity 101 and is located on the side of the spool assembly 20 away from the valve port 102 for driving the spool assembly 20 to move. Wherein, a flow groove 301 is opened on one or both of the end faces of the iron core assembly 30 close to the spool assembly 20 and the end face of the spool assembly 20 close to the iron core assembly 30, and the flow groove 301 communicates with the valve cavity 101.

[0031] It can be understood that when the solenoid valve 100 is in the open state, the iron core assembly 30 and the spool assembly 20 are in contact. And in the present application, by opening a flow groove 301 communicating with the valve cavity 101 on the iron core assembly 30 and / or the spool assembly 20, the pressure at the contact between the spool assembly 20 and the iron core assembly 30 can be balanced through the flow groove 301, thereby reducing the adhesion force generated when the two are in contact. Therefore, when the iron core assembly 30 is powered on and drives the spool assembly 20 to move, the driving difficulty of the spool assembly 20 can be effectively reduced, the response speed of the spool assembly 20 can be improved, and thus the closing efficiency of the solenoid valve 100 can be greatly improved.

[0032] In an embodiment, as Figure 1 and Figure 2 shown, the iron core assembly 30 includes a moving iron core 31, a static iron core 32, and a push rod 33. The static iron core 32 is connected to the valve body assembly 10 in a limited manner. The moving iron core 31 is movably arranged on the side of the static iron core 32 away from the spool assembly 20. One end of the push rod 33 is connected to the moving iron core 31, and the other end passes through the static iron core 32 and abuts against the spool assembly 20. And as the moving iron core 31 moves towards the static iron core 32, the push rod 33 can push the spool assembly 20 to move synchronously to close the valve port 102. Wherein, the flow groove 301 is opened on the end face of the static iron core 32 close to the spool assembly 20.

[0033] When the solenoid valve 100 is energized, the static iron core 32 can generate an attractive force on the moving iron core 31, thereby driving the moving iron core 31 to move towards the static iron core 32. At this time, since the ejector rod 33 is connected to the moving iron core 31, the moving iron core 31 can drive the ejector rod 33 to move synchronously, so that the ejector rod 33 pushes the valve core assembly 20 to block the valve port 102. In this way, the solenoid valve 100 can be closed.

[0034] Further, in an embodiment, the valve core assembly 20 includes a main valve core 21, an elastic support member 23, and a gasket 24. An assembly hole 201 is formed in the main valve core 21. The elastic support member 23 and the gasket 24 are both installed in the assembly hole 201 in a limited manner. One end of the elastic support member 23 abuts against the bottom wall of the assembly hole 201 away from the valve port 102, and the other end is connected to and applies a force to the gasket 24. Among them, a flow groove 301 is formed in the end face of the main valve core 21 close to the static iron core 32.

[0035] In this way, through the force applied by the elastic support member 23 to the gasket 24, it can ensure that the gasket 24 realizes stable sealing of the valve port 102 when the solenoid valve 100 is closed, prevent the sealing performance from decreasing due to wear or fatigue of the gasket 24, and avoid leakage, thereby greatly improving the safety of the solenoid valve 100.

[0036] For the convenience of description, in this application, the flow groove 301 is specifically described by taking the core iron assembly 30 as an example.

[0037] In an embodiment, as Figure 3 shown, the number of the flow grooves 301 is multiple, and the multiple flow grooves 301 are arranged at intervals along the circumferential direction of the core iron assembly 30. In this way, the adhesion force generated when the valve core assembly 20 and the core iron assembly 30 are attached can be further reduced, so as to improve the efficiency of the valve core assembly 20 detaching from the core iron assembly 30.

[0038] Specifically, in this embodiment, four flow grooves 301 are formed, and the four flow grooves 301 are evenly distributed at intervals along the circumferential direction of the core iron assembly 30. However, it is not limited thereto. In other embodiments, the number of the flow grooves 301 can also be set to two, three, five or more. And, the flow groove 301 preferably extends along the radial direction of the core iron assembly 30 for the convenience of processing. Of course, it can also be set at a certain angle with the radial direction of the core iron assembly 30.

[0039] Further, in an embodiment, the flow groove 301 is a cutting formed structure. In this way, it is convenient for the processing of the flow groove 301 and can reduce the processing difficulty. Among them, the cross-sectional shape of the flow groove 301 can be set to a rectangle, a triangle or an arc, etc., and can be specifically set reasonably according to actual needs.

[0040] Of course, in other embodiments, the flow groove 301 can also be processed by processes such as stamping and casting.

[0041] In one embodiment, as Figure 2 shown, the valve body assembly 10 includes a main valve body 11 and a conduit 12. One end of the conduit 12 is inserted into the main valve body 11 and connected to the main valve body 11. Among them, the armature assembly 30 is installed in the conduit 12. In this way, by setting the valve body assembly 10 as a split structure, the installation difficulty of the armature assembly 30 can be reduced.

[0042] Further, one end of the static iron core 32 close to the valve core assembly 20 protrudes in a direction away from its own axis to form a first step 321. The inner wall of the main valve body 11 is provided with a second step 111. Along the axial direction of the static iron core 32, one end of the first step 321 abuts against the second step 111, and the other end abuts against the end face of the conduit 12. In this way, the limit installation of the static iron core 32 can be realized.

[0043] In one embodiment, the outer wall of the conduit 12 and the inner wall of the main valve body 11 are in interference fit to improve the connection strength between the conduit 12 and the main valve body 11. At the same time, the coaxiality of the two is ensured by interference, and the accurate positioning of the static iron core 32 is realized.

[0044] Further, in one embodiment, the static iron core 32 and the conduit 12 are welded by high-frequency welding. In this way, compared with traditional laser welding, the welding cost between the static iron core 32 and the conduit 12 can be reduced.

[0045] In other embodiments, the static iron core 32 and the conduit 12 can also be welded and formed by laser welding.

[0046] When the solenoid valve 100 of the present application is assembled, the static iron core 32 can be first installed in the main valve body 11, and then the conduit 12 is sleeved on the outer periphery of the static iron core 32 and gradually pressed into the main valve body 11, so that the end of the conduit 12 and the second step 111 on the inner wall of the main valve body 11 compress the first step 321 on the static iron core 32. After that, the static iron core 32 and the conduit 12 are fixedly connected by means of high-frequency welding or the like. In this way, the stable connection and positioning of the three are realized, and the production process is greatly simplified.

[0047] Since the armature assembly 30 is installed in the conduit 12, in order to prevent the moving iron core 31 from detaching from the conduit 12 during movement, in one embodiment, as Figure 1 shown, the solenoid valve 100 further includes a head 40, and the head 40 plugs the end of the conduit 12 away from the valve core assembly 20. In this way, the reliability and safety of the installation of the armature assembly 30 can be greatly improved.

[0048] Furthermore, in one embodiment, the core iron assembly 30 further includes a first elastic member 34. One end of the first elastic member 34 is connected to the head 40, and the other end is connected to the moving iron core 31. It can be understood that the first elastic member 34 is used for the moving iron core 31 to move back to its original position. Specifically, when the solenoid valve 100 is energized, the moving iron core 31 moves and deforms the first elastic member 34. When the solenoid valve 100 is de-energized, since the attraction force between the static iron core 32 and the moving iron core 31 disappears, the moving iron core 31 can move back to its original position under the elastic restoring force of the first elastic member 34, thereby canceling the pushing force of the ejector rod 33 on the valve core assembly 20. The valve core assembly 20 can move and open the valve port 102, realizing the opening of the solenoid valve 100.

[0049] To improve the valve opening convenience of the solenoid valve 100, in one embodiment, the valve core assembly 20 further includes a second elastic member 22. The second elastic member 22 is sleeved on the outer periphery of the main valve core 21, and both ends of the second elastic member 22 are respectively connected to the main valve core 21 and the main valve body 11. In this way, when the solenoid valve 100 is energized, the second elastic member 22 can be compressed under force as the main valve core 21 moves. When the solenoid valve 100 is de-energized, the main valve core 21 can move away from the valve port 102 under the elastic restoring force of the second elastic member 22, thereby realizing the automatic opening of the solenoid valve 100, and the opening process of the solenoid valve 100 is simpler.

[0050] This application also provides an air conditioning system, which includes the solenoid valve 100 described in any one of the above embodiments.

[0051] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0052] The above-described embodiments only represent several implementation manners of this application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the patent protection scope of this application should be subject to the appended claims.

Claims

1. A solenoid valve, characterized in that: The invention comprises a valve body assembly (10), a valve core assembly (20) and a core iron assembly (30); the valve body assembly (10) is provided with a valve cavity (101) and a valve port (102) communicating with the valve cavity (101); the valve core assembly (20) is movably installed in the valve cavity (101) to open or close the valve port (102); The core iron component (30) is installed in the valve cavity (101) and is located on a side of the valve core component (20) away from the valve port (102), and is used to drive the valve core component (20) to move, wherein a flow groove (301) is provided on one or both of the end surface of the core iron component (30) close to one end of the valve core component (20) and the end surface of the valve core component (20) close to one end of the core iron component (30), and the flow groove (301) is connected to the valve cavity (101).

2. The solenoid valve according to claim 1, characterized in that: There are a plurality of the circulation grooves (301), and the plurality of circulation grooves (301) are arranged at intervals along the circumferential direction of the core iron component (30).

3. The solenoid valve according to claim 1, characterized in that: The circulation groove (301) is a cutting-shaped structure.

4. The solenoid valve according to claim 1, characterized in that: The core iron assembly (30) comprises a moving iron core (31), a stationary iron core (32) and a push rod (33); the stationary iron core (32) is positionally connected to the valve body assembly (10); and the moving iron core (31) is movably arranged on a side of the stationary iron core (32) away from the valve core assembly (20); One end of the push rod (33) is connected to the moving iron core (31), and the other end is passed through the stationary iron core (32) and abuts against the valve core assembly (20), and as the moving iron core (31) moves toward the stationary iron core (32), the push rod (33) can push the valve core assembly (20) to move synchronously to close the valve port (102); Wherein, the circulation groove (301) is opened on the end surface of the static iron core (32) close to one end of the valve core assembly (20).

5. The solenoid valve according to claim 4, characterized in that: The valve core assembly (20) comprises a main valve core (21), an elastic support member (23) and a sealing gasket (24); an assembly hole (201) is provided in the main valve core (21); the elastic support member (23) and the sealing gasket (24) are both limitedly installed in the assembly hole (201); one end of the elastic support member (23) abuts against a bottom wall of the assembly hole (201) at one end away from the valve port (102), and the other end is connected to and applies force to the sealing gasket (24); The flow groove (301) is provided on an end surface of the main valve core (21) close to one end of the static iron core (32).

6. The solenoid valve according to claim 4, characterized in that: The valve body assembly (10) comprises a main valve body (11) and a conduit (12), one end of the conduit (12) being inserted into the main valve body (11) and connected to the main valve body (11); Among them, one end of the static iron core (32) close to the valve core assembly (20) protrudes in the direction away from its own axis to form a first step (321), and the inner wall of the main valve body (11) is provided with a second step (111). Along the axial direction of the static iron core (32), one end of the first step (321) abuts against the second step (111), and the other end abuts against the end face of the conduit (12).

7. The solenoid valve according to claim 6, characterized in that: The outer wall of the conduit (12) is interference-fitted with the inner wall of the main valve body (11).

8. The solenoid valve according to claim 6, characterized in that: The static iron core (32) and the conduit (12) are welded by high-frequency welding or laser welding.

9. The solenoid valve according to claim 6, characterized in that: The solenoid valve further comprises a sealing head (40), wherein the sealing head (40) seals an end of the conduit (12) away from the valve core assembly (20).

10. The solenoid valve according to claim 9, characterized in that: The core iron assembly (30) further comprises a first elastic member (34), one end of the first elastic member (34) being connected to the seal head (40) and the other end being connected to the moving iron core (31).

11. An air conditioning system, characterized in that: It comprises a solenoid valve as described in any one of claims 1 to 10.

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