Electromagnetic valve

Abstract

According to the electromagnetic valve, the sleeve is designed to be of a straight cylinder structure and applied to a specific electromagnetic valve structure, so that at least part of the static iron core is located in the sleeve and fixedly connected with one end of the sleeve, and at least part of the other end of the sleeve is located in the valve seat and fixedly connected with the valve seat; through the matching improvement of the sleeve and the valve seat structure, the deformation condition of the valve seat can be relatively reduced.

Description

[Technical Field]

[0001] This application relates to the field of automotive control technology, and in particular to a solenoid valve. [Background Technology]

[0002] In automotive systems, solenoid valves are commonly used between compressors and reed valves for depressurization of the medium. A solenoid valve consists of a stationary iron core, a moving iron core, a plastic valve seat, and a sleeve. The sleeve is installed on the outer periphery of the valve seat, and the plastic valve seat is often prone to deformation. [Summary of the Invention]

[0003] Through extensive research, the inventors discovered that a significant cause of valve seat deformation is actually the deformation that occurs during the installation process between the sleeve and the valve seat. The sleeve employs a tensioned structure, and the lower part of the sleeve is deformed by riveting to achieve installation with the valve seat. This can easily lead to excessive stress concentration at the mating part between the sleeve and the valve seat, resulting in valve seat deformation. The technical problem that this invention aims to solve is to provide a solenoid valve that, through improvements in the fit between the sleeve and the valve seat, can relatively reduce valve seat deformation.

[0004] This application provides a solenoid valve, including a valve seat made of plastic, a moving core assembly, a stationary iron core, an elastic element, and a sleeve. The sleeve is generally cylindrical. The stationary iron core is at least partially located inside the sleeve and fixedly connected to one end of the sleeve. The other end of the sleeve is at least partially located inside the valve seat and fixedly connected to the valve seat. The moving core assembly is slidably engaged with the sleeve, and a flow gap S is formed between them. The elastic element is located between the stationary iron core and the moving core assembly.

[0005] The valve seat includes a first valve port portion having a first valve orifice, the valve seat is provided with a first flow channel and a second flow channel located on the outer periphery of the first flow channel, the stationary iron core includes a second valve port portion having a second valve orifice and a third flow channel, and the moving core assembly includes a first sealing portion and a second sealing portion;

[0006] When the first sealing part abuts against the first valve port, and the second sealing part moves away from the second valve port, the second flow channel, the flow gap S, the second valve port, and the third flow channel are connected; when the second sealing part abuts against the second valve port, and the first sealing part moves away from the first valve port, the second flow channel, the first valve port, and the first flow channel are connected.

[0007] This application designs the sleeve as a straight cylindrical structure and applies it to a specific solenoid valve structure, so that the stationary iron core is at least partially located inside the sleeve and fixedly connected to one end of the sleeve, and the other end of the sleeve is at least partially located inside the valve seat and fixedly connected to the valve seat. By improving the fit between the sleeve and the valve seat structure, the deformation of the valve seat can be relatively reduced. [Attached Image Description]

[0008] Figure 1 A cross-sectional view of the overall structure of the solenoid valve provided by the present invention, wherein the first valve port is closed and the second valve port is open.

[0009] Figure 2 A cross-sectional view of the overall structure of the solenoid valve provided by the present invention, wherein the first valve port is open and the second valve port is closed.

[0010] Figure 3 A cross-sectional schematic diagram of the valve seat structure of the solenoid valve provided by the present invention;

[0011] Figure 4 A cross-sectional schematic diagram of the moving core assembly structure of the solenoid valve provided by the present invention;

[0012] Figure 5 A cross-sectional schematic diagram of the static iron core structure of the solenoid valve provided by the present invention;

[0013] Figure 6 A cross-sectional schematic diagram of the sleeve structure of the solenoid valve provided by the present invention.

[0014] [Attached image labels]

[0015] Valve seat 20, first valve port portion 21, first valve port 211, first flow channel 22, second flow channel 23, step portion 24, side wall portion 25, first valve port channel 21a, valve seat cavity 201;

[0016] The components include a stationary iron core 30, a body part 31, a flange part 32, a second valve port part 311, a second valve port 3111, a second valve port passage 311a, a third flow passage 312, and a stop part 313.

[0017] Moving core assembly 40, moving core component 41, seal 42, first sealing part 421, second sealing part 422, transition part 411; elastic element 50, flow gap S, sleeve 60

Detailed Implementation Methods

[0018] To enable those skilled in the art to better understand the technical solutions provided in this application, the technical solutions of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that this application mainly protects a solenoid valve structure, which focuses on improving the design of the fitting connection structure between the sleeve and the valve seat, thereby relatively reducing the deformation of the valve seat and reducing the cost of components.

[0019] Implementation

[0020] Please refer to Figure 1-3 The diagram shown is a cross-sectional view of the solenoid valve structure provided in this application. The solenoid valve is used in the channel between the compressor and the air spring stiffness valve in an automotive system to allow the flow of media and timely pressure relief. It includes a valve seat 20, a stationary iron core 30, a moving core assembly 40, an elastic element 50, and a sleeve 60. The valve seat 20 is made of plastic and can be machined or integrally injection molded. The valve seat 20 includes a first valve port portion 21 with a first valve port 211. The valve seat 20 has a first valve port channel 21a, a first channel 22, and a second channel 23. The first valve port channel 21a communicates with the first channel 22, and the diameter of the first valve port channel 21a is smaller than the diameter of the first channel 22. The second channel 23 is located on the outer periphery of the first channel 22, and the second channel 22 can communicate with the first valve port channel and the first channel. The valve seat 20 also includes a stepped portion 24 and a side wall portion 25. In specific applications, the first channel 22 serves as the inlet channel, and the second channel 22 serves as the outlet channel. (Refer to...) Figure 6 As shown, the sleeve 60 has a roughly cylindrical structure. The sleeve 60 is made of metal and can be formed by stamping. It should be noted that "roughly cylindrical" here refers to a shape where, for example, a wavy structure can be used, but this does not affect the overall vertical cylindrical structure of the sleeve 60. The stationary iron core 30 is at least partially located inside the sleeve 60 and fixedly connected to one end of the sleeve 60. Specifically, this connection can be achieved through welding or bonding. The other end of the sleeve 60 is at least partially located inside the valve seat 20 and fixedly connected to the valve seat 20. Regarding the specific connection method between the sleeve and the valve seat, the valve seat 20 and the sleeve 60 can be formed as a single unit through injection molding; or the other end of the sleeve 60 abuts against the stepped portion 24, and the outer periphery of the other end is fixed to the side wall portion 25 by welding; or the outer periphery of the other end is fixed to the side wall portion 25 by bonding. The method of fixing the sleeve and the valve seat is not limited here, as long as a fixed connection between the cylindrical sleeve and the valve seat can be achieved.

[0021] By modifying the sleeve structure to a roughly straight cylindrical shape and improving the connection and fit with the valve seat, the previous situation where additional riveting deformation was required at the bottom of the sleeve after installing the moving core component and the valve seat to fix it to the valve seat caused stress concentration at the mating parts of the two. This greatly reduced the deformation of the valve seat, and the overall manufacturing cost of the sleeve was reduced.

[0022] The following is for reference. Figure 1-2 Combination Figure 4 , 5 The moving core assembly 40 includes a moving core component 41 and a seal 42. The seal 42 is fixedly installed to the moving core component 41 through a vulcanization process. The seal 42 includes a first sealing part 421 and a second sealing part 422. The first sealing part 421 can abut against or move away from the first valve port 21, and the second sealing part 422 can abut against or move away from the second valve port 311. The moving core component 41 is located inside the sleeve 60 and slides with the sleeve. A coil component can be installed on the outer periphery of the sleeve 60. Under the action of energization and excitation, the moving core assembly 40 overcomes the elastic force of the elastic member 50 and moves towards the stationary iron core 30 to attract it. When the power is off, the magnetic force decreases, and under the spring reset action of the elastic member 50, the moving core assembly 40 moves downward as a whole. The moving core component 41 includes a large diameter part, a small diameter part, and a transition part 411 between the large diameter part and the small diameter part. The stationary iron core 30... The device includes a body portion 31 and a flange portion 32 extending axially downward from the body portion 31. The body portion 31 includes abutting portion 313. The stationary iron core 30 includes a second valve port portion 311 having a second valve port 3111. The stationary iron core 30 is provided with a second valve port channel 311a and a third flow channel 312, wherein the second valve port 3111, the second valve port channel 311a and the third flow channel 312 are connected, and the diameter of the second valve port channel 311a is smaller than the diameter of the third flow channel 312. A portion of the elastic member 50 is sleeved on the outer periphery of the flange portion 32, and another portion of the elastic member 50 is sleeved on the outer periphery of the small diameter portion. One end of the elastic member 50 abuts against the abutting portion 313, and the other end abuts against the transition portion 411. It should be noted that the abutting in this specification includes the case of direct abutting between components as well as the case of indirect abutting by adding a third-party component.

[0023] The operating principle of the solenoid valve is described below. When the coil is energized, the moving core assembly 40 overcomes the elasticity of the elastic element 50 and is attracted upward to the stationary iron core 30. At this time, the first sealing part 421 moves away from the first valve port 21a, and the second sealing part 422 abuts against the second valve port 311. The medium enters through the first flow channel 22, passes through the first valve port channel 21a, the first valve port 211, and the valve seat cavity 201, and flows out through the second flow channel 23, which serves as the outlet channel, to relieve pressure. When the coil is de-energized and the energizing effect decreases, under the restoring action of the elastic element 50, the moving core assembly 40 moves downward as a whole until the first sealing part 421 abuts against the first valve port 21a. At this time, the second sealing part 422 moves away from the second valve port 311, and the medium enters the valve seat cavity 201 from the second flow channel 23. It then flows out through the flow gap S, the cavity between the moving core assembly and the stationary iron core, the second valve port 3111, and the second valve port channel 311a, and flows out through the third flow channel 312 to relieve pressure.

[0024] This application designs the sleeve as a straight cylindrical structure and applies it to a specific solenoid valve structure, so that the stationary iron core is at least partially located inside the sleeve and fixedly connected to one end of the sleeve, and the other end of the sleeve is at least partially located inside the valve seat and fixedly connected to the valve seat. By improving the fit between the sleeve and the valve seat structure, the deformation of the valve seat can be relatively reduced.

[0025] It should be noted that the directional terms such as "up," "down," "left," and "right" mentioned in this document are all introduced for ease of description based on the accompanying drawings; and the ordinal numbers such as "first" and "second" in the component names are also introduced for ease of description and do not imply any limitation on the order of the components. Furthermore, since some parts of the components provided in the above embodiments have the same function, this specification adopts a unified naming method for these parts. The solenoid valve structure provided by the relevant technical solutions has been described in detail above. Specific embodiments have been used in this document for illustration. The descriptions of the above embodiments are only for helping to understand the method and core ideas of the present invention and are not intended to limit the present invention in any way.

Claims

1. An electromagnetic valve characterized by comprising: The valve seat, the moving core assembly, the static core, the elastic member and the sleeve are made of plastic material, the sleeve is substantially a straight cylinder, the static core is at least partially located in the sleeve and fixedly connected with one end of the sleeve, the other end of the sleeve is at least partially located in the valve seat and fixedly connected with the valve seat, the moving core assembly is in sliding fit with the sleeve and a flow gap S is formed between the moving core assembly and the sleeve, and the elastic member is located between the static core and the moving core assembly. The valve seat comprises a first valve port portion with a first valve port, the valve seat is provided with a first flow channel and a second flow channel located at the outer circumferential portion of the first flow channel, the static core comprises a second valve port portion provided with a second valve port, the static core is provided with a third flow channel, and the moving core assembly comprises a first sealing portion and a second sealing portion. When the first sealing portion abuts against the first valve port portion and the second sealing portion is away from the second valve port portion, the second flow channel, the flow gap S, the second valve port and the third flow channel are in communication; when the second sealing portion abuts against the second valve port portion and the first sealing portion is away from the first valve port portion, the second flow channel, the first valve port and the first flow channel are in communication.

2. The electromagnetic valve according to claim 1, characterized by The valve seat and the sleeve are integrally formed by injection molding.

3. The electromagnetic valve according to claim 1, characterized by The valve seat is provided with a step portion and a side wall portion, the other end of the sleeve abuts against the step portion, and the outer circumferential portion of the other end is welded and fixed with the side wall portion.

4. The electromagnetic valve according to claim 1, characterized by The valve seat is provided with a step portion and a side wall portion, the other end of the sleeve abuts against the step portion, and the outer circumferential portion of the other end is adhesively fixed with the side wall portion.

5. The electromagnetic valve according to any one of claims 1 to 4, characterized by The valve seat is provided with a first valve port channel, and the diameter of the first valve port channel is smaller than that of the first channel.

6. The electromagnetic valve according to claim 5, characterized by When the second sealing portion abuts against the second valve port portion and the first sealing portion is away from the first valve port portion, the second flow channel, the first valve port, the first valve port channel and the first flow channel are in communication.

7. The electromagnetic valve according to any one of claims 1 to 4, characterized by The static core is provided with a second valve port channel, and the diameter of the second valve port channel is smaller than that of the third channel.

8. The electromagnetic valve according to claim 7, characterized by When the first sealing portion abuts against the first valve port portion and the second sealing portion is away from the second valve port portion, the second flow channel, the flow gap S, the second valve port, the second valve port channel and the third flow channel are in communication.

9. The electromagnetic valve according to any one of claims 1 to 4, characterized by The valve seat is formed by machining or integrally injection molding, and the sleeve is formed by stamping.

10. The electromagnetic valve according to any one of claims 1 to 4, characterized by The static core comprises a body portion and a flange portion extending axially downward from the body portion, the body portion comprises an abutting portion, the valve seat comprises a large-diameter portion, a small-diameter portion and a transition portion connecting the large-diameter portion and the small-diameter portion, part of the elastic member is sleeved on the outer circumferential portion of the flange portion, and another part of the elastic member is sleeved on the small-diameter portion, one end of the elastic member abuts against the abutting portion, and the other end abuts against the transition portion.

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