CN117847229A - The electromagnetic valve - Google Patents

Abstract

The invention discloses a solenoid valve, which comprises: valve body, case, first elastic component. The valve body is provided with a magnetic core assembly, a valve cavity is defined in the valve body, an inlet and an outlet are formed in the valve body, and the inlet is communicated with the valve cavity. The valve core is arranged in the valve cavity, the valve core can move towards the direction of the outlet under the action of the magnetic core component to block the outlet, the valve core is internally provided with a storage cavity and a first fluid channel, the first fluid channel is communicated with the outlet, and the storage cavity is communicated with the valve cavity when the valve core blocks the outlet. The valve core can move towards a direction away from the outlet under the action of the first elastic piece so as to open the outlet. Therefore, the reliability and stability of the electromagnetic valve can be improved by arranging the storage cavity inside the valve core.

Description

The electromagnetic valve

Technical Field

The present invention relates to the technical field of solenoid valves, and in particular to a solenoid valve.

Background technique

In the prior art, the control of the fluid inside the vehicle is generally achieved through the on-off control of the solenoid valve, such as the control switch of the refrigerant flow of the air-conditioning system. However, the structure of the solenoid valve in the prior art is relatively complex, the control logic is not simple enough, the movement structure of the valve core in the connecting position and the isolating position is complex, and it is easy to occupy more internal space, which is not conducive to the layout of other systems. In addition, the installation efficiency of the solenoid valve is low, and the sealing performance of the valve core when it stops at the outlet is poor.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a solenoid valve that can simplify the installation structure of the solenoid valve and reduce the manufacturing cost of the solenoid valve.

According to an embodiment of the present invention, a solenoid valve comprises: a valve body, a valve core, and a first elastic member. The valve body is provided with a magnetic core assembly, a valve cavity is defined in the valve body, an inlet and an outlet are formed on the valve body, and the inlet is connected to the valve cavity. The valve core is arranged in the valve cavity and is located between the outlet and the magnetic core assembly. The valve core can move toward the outlet under the action of the magnetic core assembly to block the outlet so that the connection between the valve cavity and the outlet is cut off. The valve core has a storage cavity and a first fluid channel, the first fluid channel is connected to the outlet, and the storage cavity is connected to the valve cavity when the valve core blocks the outlet. The first elastic member is arranged between the valve body and the valve core. The valve core can move in a direction away from the outlet under the action of the first elastic member to open the outlet so that the outlet is connected to the valve cavity.

According to the solenoid valve of the present invention, the valve core can move toward the outlet to block the outlet under the action of the magnetic core assembly to cut off the connection between the inlet and the outlet, or the valve core can move in the direction away from the outlet and separate from the outlet to open the outlet under the action of the first elastic member, so that the inlet and the outlet are connected through the valve cavity; the present application sets a storage cavity inside the valve core. When the valve core needs to be kept in a state of blocking the outlet, the storage cavity inside the valve core is easy to form a pressure difference with the first circulation channel, and the pressure inside the storage cavity is greater than the pressure inside the first fluid channel, which can better achieve the blocking of the outlet by the valve core; at the same time, when the valve core needs to be kept in a state of opening the outlet, the storage cavity inside the valve core will also form a pressure difference with the first circulation channel. At this time, the pressure inside the storage cavity is less than the pressure inside the valve cavity and the first fluid channel, which can better achieve the valve core being kept in an open state. Therefore, by setting a storage cavity inside the valve core, the reliability and stability of the solenoid valve can be improved.

In some embodiments, the valve core can move between a connecting position and a disconnecting position, and at least one second fluid channel is provided between the valve core and the valve body; when the valve core is located at the disconnecting position, the valve core blocks the outlet to disconnect the connection between the inlet and the outlet, the storage chamber is connected to the valve chamber, and the external fluid is suitable for flowing to the storage chamber through the inlet via the second fluid channel; when the valve core is located at the connecting position, the valve core is separated from the outlet to connect the inlet and the outlet, and the connection between the storage chamber and the valve chamber is disconnected.

In some embodiments, the magnetic core assembly further includes: a sleeve, a moving iron core, a stationary iron core, and a second elastic member, wherein the sleeve is fixed to an end of the valve body away from the valve core, at least a portion of the moving iron core is disposed in the sleeve, the moving iron core can move relative to the valve body in the sleeve, the stationary iron core is disposed in the sleeve and is located on a side of the moving iron core away from the valve core, and the second elastic member is disposed between the stationary iron core and the moving iron core.

In some embodiments, the valve core is always kept in the blocking position; when the valve core moves from the blocking position to the connecting position, the magnetic core assembly is separated from the valve core and the outlet is connected to the storage chamber through the first fluid channel, and the valve core moves in a direction away from the outlet under the action of the first elastic member to open the outlet so that the outlet and the valve chamber are connected. When the valve core is reset from the connecting position to the blocking position, the moving iron core is separated from the static iron core under the elastic force of the second elastic member, and the moving iron core drives the valve core to move toward the outlet, and the connection between the first fluid channel and the storage chamber is blocked.

In some embodiments, when the valve core is located at the isolating position, the second elastic member acts on the valve core through the moving iron core so that the valve core blocks the outlet to isolate the connection between the inlet and the outlet; when the valve core is located at the connecting position, the valve core is separated from the outlet under the action of the first elastic member to enable the connection between the inlet and the outlet; the elastic force of the second elastic member is greater than the elastic force of the first elastic member.

In some embodiments, the valve core is a plastic part.

In some embodiments, one end of the storage chamber away from the outlet is open; the second fluid channel includes: at least one first flow channel and at least one second flow channel, the first flow channel is formed on at least one of the outer wall of the valve core and the inner wall of the valve body; the second flow channel is jointly defined between the end of the valve core away from the outlet and the inner wall of the valve body away from the outlet, and the first flow channel is suitable for communicating with the storage chamber through the second flow channel.

In some embodiments, the first flow channel extends along the axial direction of the valve core, and a cross-sectional area of the first flow channel gradually decreases in a direction from an end of the valve core adjacent to the outlet toward an end of the valve core away from the outlet.

In some embodiments, the first flow channel is a groove formed on the outer side wall of the valve core, and the distance between the two side walls of the first flow channel gradually decreases in a direction from an end of the valve core adjacent to the outlet toward an end of the valve core away from the outlet.

In some embodiments, along a direction from an end of the valve core adjacent to the outlet toward an end of the valve core away from the outlet, a bottom wall of the first flow channel extends obliquely toward a direction away from a central axis of the valve core.

In some embodiments, an end of the valve core away from the outlet is spaced apart from an inner wall of the valve body away from the outlet to define the second flow channel.

In some embodiments, the end of the valve core away from the outlet is provided with at least one first rib extending along the circumference of the valve core, and a connecting channel is formed on the first rib and penetrates the two side surfaces of the first rib along the radial direction of the valve core, and the storage chamber is connected with the inlet through the connecting channel.

In some embodiments, the width of the first rib is smaller than the wall thickness of the end of the valve core away from the outlet, and the surface of the first rib adjacent to the central axis of the valve core is flush with the inner wall surface of the valve core.

In some embodiments, there are a plurality of the first flow passages and a plurality of the communication passages, and the plurality of the first flow passages and the plurality of the communication passages are respectively arranged at intervals along the circumferential direction of the valve core.

In some embodiments, the number of the first flow channels is greater than the number of the communication channels.

In some embodiments, a valve core extension portion extending along the axial direction of the valve core is provided in the storage chamber, and the first fluid channel is defined in the valve core extension portion. The first fluid channel runs through both ends of the valve core extension portion so as to be suitable for communicating with the storage chamber and the outlet respectively, and the moving iron core is detachably matched with an end of the extension portion adjacent to the moving iron core.

In some embodiments, a pressure relief member is provided at the end of the valve core extension portion adjacent to the moving iron core, and at least one pressure relief hole is formed on the pressure relief member. When the moving iron core is separated from the end of the valve core extension portion adjacent to the moving iron core, the storage chamber is connected to the first fluid channel through the pressure relief hole.

In some embodiments, the pressure relief member is a pressure relief cover, and the pressure relief member cover is disposed on the end of the valve core extension portion adjacent to the moving iron core.

In some embodiments, a plurality of positioning ribs are provided on the inner side wall of the pressure relief member and are spaced apart along the circumference of the pressure relief member; or the pressure relief member is interference fit with the end of the valve core extension portion adjacent to the moving iron core.

In some embodiments, the pressure relief member includes a first pressure relief portion and a second pressure relief portion, the second pressure relief portion is connected to a side of the first pressure relief portion away from the moving iron core, the first pressure relief portion is arranged on an end surface of the valve core extension portion adjacent to the one end of the moving iron core, the second pressure relief portion is fitted in the first fluid channel, and the pressure relief hole passes through the first pressure relief portion and the second pressure relief portion.

In some embodiments, there are multiple pressure relief holes, and the multiple pressure relief holes are arranged on the pressure relief member at intervals from each other.

In some embodiments, the pressure relief hole is a circular hole, and the diameter of the pressure relief hole is d, wherein d satisfies: 0.4 mm≤d≤1 mm.

In some embodiments, the pressure relief component is a plastic component or a soft plastic component.

In some embodiments, the valve body includes: a main body and a valve seat, wherein one end of the main body away from the magnetic core assembly is open, the inlet is formed on the main body, the valve seat is arranged at the end of the main body away from the magnetic core assembly, the valve seat and the main body jointly define the valve cavity, and the outlet is formed on the valve seat.

In some embodiments, the valve core includes: a first valve core segment and a second valve core segment, the second valve core segment is connected to an end of the first valve core segment away from the outlet, the cross-sectional area of the second valve core segment is larger than the cross-sectional area of the first valve core segment to form a step portion between the first valve core segment and the second valve core segment, and one end of the first elastic member stops at the step portion.

In some embodiments, the first elastic member and an outer circumferential surface of the first valve core segment are spaced apart from each other.

In some embodiments, the valve seat includes a first valve seat mating portion and a valve seat extension portion connected to each other along the axial direction of the valve body, the valve seat extension portion is located on a side of the first valve seat mating portion away from the valve core, the cross-sectional area of the valve seat extension portion is larger than the cross-sectional area of the first valve seat mating portion to define a first step portion between the valve seat extension portion and the first valve seat mating portion, and an end of the first elastic member adjacent to the outlet stops at the first step portion.

In some embodiments, the inner circumferential surface of the first elastic member abuts against the outer circumferential surface of the first valve seat matching portion.

In some embodiments, the valve seat extension portion includes a first valve seat extension portion and a second valve seat extension portion connected to each other along the axial direction of the valve core, the second valve seat extension portion is located on a side of the first valve seat extension portion away from the first valve seat mating portion, the first valve seat extension portion is mated in the valve body, one end of the first elastic member adjacent to the outlet is abutted against the first valve seat extension portion, and the second valve seat extension portion is abutted against the end surface of the one end of the valve body.

In some embodiments, a second valve seat fitting portion is provided on a side of the valve seat extension portion away from the first valve seat fitting portion, and a first sealing member is provided on an outer surface of the second valve seat fitting portion.

In some embodiments, the body has a first chamber and a second chamber connected to each other along the axial direction of the valve core, the first chamber is located on a side of the second chamber away from the valve seat, the cross-sectional area of the second chamber is larger than the cross-sectional area of the first chamber, the first valve core section is fitted in the first chamber, the second valve core section is located in the second chamber, and the inlet is formed on the side wall of the second chamber.

In some embodiments, the surface of the valve core suitable for abutting against the valve seat is formed as an arc surface.

In some embodiments, an outer peripheral surface of an end of the body away from the outlet has a plurality of clamping surfaces arranged along the circumference of the body.

In some embodiments, the body is an integrally formed piece.

In some embodiments, the valve seat is a body of revolution structure.

In some embodiments, the first elastic member is a spring.

In some embodiments, the first elastic member is a round wire spring or a flat wire spring.

In some embodiments, the first elastic member is a cylindrical spring or a conical spring.

In some embodiments, at least the portion of the valve core that cooperates with the outlet is provided with a soft rubber part.

Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

FIG. 1 is a schematic diagram of a solenoid valve according to an embodiment of the present invention.

FIG. 2 is a schematic perspective exploded view of a solenoid valve according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of a valve body according to an embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view of a valve seat according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a valve core according to an embodiment of the present invention.

FIG. 6 is a cross-sectional schematic diagram of a valve core according to an embodiment of the present invention (without soft rubber parts).

FIG. 7 is a schematic cross-sectional view of a valve core according to an embodiment of the present invention (with soft rubber parts).

FIG. 8 is a schematic diagram of a pressure relief member according to an embodiment of the present invention (with positioning ribs).

FIG. 9 is a schematic diagram of a pressure relief member according to an embodiment of the present invention (without positioning ribs).

FIG. 10 is a schematic diagram of assembling a conical spring according to an embodiment of the present invention.

Reference numerals:

100. Solenoid valve;

10. Valve body; 101. Main body; 1011. First chamber; 1012. Second chamber; 10121. Support rib; 1013. Clamping surface; 102. Valve seat; 1021. First valve seat matching portion; 1022. Valve seat extension portion; 10221. First valve seat extension portion; 10222. Second valve seat extension portion; 1023. First step portion; 1024. Second valve seat matching portion; 1025. First sealing member; 11. Stationary iron core; 12. Moving iron core; 13. Second elastic member; 14. Valve chamber; 15. Inlet; 16. Outlet;

20. Valve core; 201. First valve core section; 202. Second valve core section; 21. First elastic member; 22. Storage chamber; 23. First fluid channel; 24. Second fluid channel; 241. First flow channel; 25. First convex rib; 251. Connecting channel; 26. Valve core extension; 27. Pressure relief member; 271. Pressure relief hole; 272. Positioning rib; 28. Step portion; 29. Soft rubber member.

Detailed ways

An embodiment of the present invention is described in detail below. The embodiment described with reference to the accompanying drawings is exemplary. A solenoid valve 100 according to an embodiment of the present invention is described below with reference to FIGS. 1 to 10 . The solenoid valve 100 includes: a valve body 10 , a valve core 20 , and a first elastic member 21 .

Specifically, as shown in FIG1 , a magnetic core assembly is provided on the valve body 10, a valve cavity 14 is defined in the valve body 10, an inlet 15 and an outlet 16 are formed on the valve body 10, and the inlet 15 is connected to the valve cavity 14. The valve core 20 is provided in the valve cavity 14 and is located between the outlet 16 and the magnetic core assembly. The valve core 20 can move toward the outlet 16 under the action of the magnetic core assembly to block the outlet 16 so that the connection between the valve cavity 14 and the outlet 16 is cut off. The valve core 20 has a storage cavity 22 and a first fluid channel 23 in the valve core 20. The first fluid channel 23 is connected to the outlet 16. The storage cavity 22 is connected to the valve cavity 14 when the valve core 20 blocks the outlet 16. The first elastic member 21 is provided between the valve body 10 and the valve core 20. The valve core 20 can move toward a direction away from the outlet 16 under the action of the first elastic member 21 to open the outlet 16 so that the outlet 16 is connected to the valve cavity 14.

When the valve core 20 moves toward the outlet 16 along the axial direction of the valve body 10, the valve core 20 compresses the first elastic member 21 to stop the valve core 20 and the outlet 16, thereby blocking the outlet 16 and isolating the connection between the outlet 16 and the valve cavity 14. The fluid entering from the inlet 15 enters the valve cavity 14 and then enters the storage cavity 22. When the valve core 20 moves in the axial direction of the valve body 10 toward a direction away from the outlet 16, the magnetic core assembly moves toward a direction away from the outlet 16, and the magnetic core assembly separates from the valve core 20. The pressure inside the storage cavity 22 and the pressure inside the valve cavity 14 are balanced through the first fluid channel 23. The first elastic member 21 drives the valve core 20 to move upward, and the valve core 20 separates from the outlet 16. The outlet 16 is connected to the valve cavity 14, and the fluid entering the valve cavity 14 from the inlet 15 flows toward the outlet 16.

According to the solenoid valve 100 of the embodiment of the present invention, the valve core 20 can move toward the outlet 16 to block the outlet 16 under the action of the magnetic core assembly to cut off the connection between the inlet 15 and the outlet 16, or the valve core 20 can move in a direction away from the outlet 16 and separate from the outlet 16 to open the outlet 16 under the action of the first elastic member 21, so that the inlet 15 and the outlet 16 are connected through the valve chamber 14. The present application sets a storage chamber 22 inside the valve core 20. When the valve core 20 needs to maintain a state of blocking the outlet 16, the storage chamber 22 inside the valve core 20 is easy to form a pressure difference with the first fluid channel 23, and the pressure inside the storage chamber 22 is greater than the pressure inside the first fluid channel 23, which can better achieve the valve core 20 blocking the outlet 16; at the same time, when the valve core 20 needs to maintain a state of opening the outlet 15, the storage chamber 22 inside the valve core 20 will also form a pressure difference with the first fluid channel 23. At this time, the pressure inside the storage chamber 22 is less than the pressure inside the valve chamber 14 and the first fluid channel 23, which can better achieve the valve core 20 to maintain in an open state. Therefore, by setting the storage chamber 22 inside the valve core 20, the reliability and stability of the solenoid valve 100 can be improved.

In some embodiments, as shown in FIG. 1 , the valve core 20 can move between a connecting position and a disconnecting position, and at least one second fluid channel 24 is provided between the valve core 20 and the valve body 10. When the valve core 20 is located at the disconnecting position, the valve core 20 blocks the outlet 16 to disconnect the connection between the inlet 15 and the outlet 16, and the storage chamber 22 is connected to the valve chamber 14. The external fluid is suitable for flowing to the storage chamber 22 through the inlet 15 via the second fluid channel 24. When the valve core 20 is located at the connecting position, the valve core 20 is separated from the outlet 16 to connect the inlet 15 and the outlet 16, and the connection between the storage chamber 22 and the valve chamber 14 is disconnected. That is, the valve core 20 has a connection position in the axial direction of the valve body 10 to connect the inlet 15 with the outlet 16, and has a separation position to separate the inlet 15 from the outlet 16. The valve core 20 moves upward under the action of the magnetic core assembly, so that the valve core 20 moves from the separation position to the connection position, and the external fluid flows from the inlet 15 to the outlet 16; after the magnetic core assembly is powered off, the magnetic core assembly moves downward to drive the valve core 20 and the outlet 16 to stop, so that the valve core 20 moves from the connection position to the separation position, and part of the external fluid flows from the inlet 15 through the valve cavity 14 and the second fluid channel 24 to the storage cavity 22. Therefore, the movement of the valve core 20 between the connection position and the separation position can facilitate the opening and closing of the outlet 16, and adjust the flow rate of the fluid flowing through the solenoid valve 100, so as to reasonably control the flow rate according to different use scenarios.

In some embodiments, as shown in Figures 1 and 2, the magnetic core assembly includes: a sleeve, a moving iron core 12, a stationary iron core 11, and a second elastic member 13. The sleeve is fixed to an end of the valve body away from the valve core, and at least part of the moving iron core 12 is disposed in the sleeve. The moving iron core 12 can move relative to the valve body 10 in the sleeve. The stationary iron core 11 is disposed on a side of the moving iron core 12 away from the valve core 20, and the second elastic member 13 is disposed between the stationary iron core 11 and the moving iron core 12.

When the valve core 20 is located at the isolating position, the second elastic member 13 acts on the valve core 20 through the moving iron core 12 so that the valve core 20 blocks the outlet 16 to isolate the connection between the inlet 15 and the outlet 16; when the valve core 20 is located at the connecting position, the valve core 20 is separated from the outlet 16 under the action of the first elastic member 21 to connect the inlet 15 and the outlet 16; the elastic force of the second elastic member 13 is greater than the elastic force of the first elastic member 21.

For example, one end of the sleeve is connected to the valve body 10, the static iron core 11 is arranged at the other end of the sleeve, and the moving iron core 12 is arranged in the space defined by the sleeve and can move relative to the valve body 10 in the sleeve. When the valve core 20 moves from the isolation position to the connection position, the magnetic core assembly is energized, the moving iron core 12 compresses the second elastic member 13 and moves toward the static iron core 11, the moving iron core 12 is separated from the valve core 20, the storage chamber 22 is connected to the first fluid channel 23, the pressure inside the storage chamber 22 is balanced with the pressure at the outlet 16, and the first fluid channel 23 is connected to the storage chamber 22. An elastic member 21 drives the valve core 20 to move toward the moving iron core 12 to separate the valve core 20 from the outlet 16, and the outlet 16 is connected to the valve cavity 14; when the valve core 20 moves from the connecting position to the disconnecting position, the magnetic core assembly is powered off, and the second elastic member 13 compresses the moving iron core 12 to make the moving iron core 12 move in a direction away from the static iron core 11, and overcomes the elastic force of the first elastic member 21 and the gravity of the valve core 20 to make the valve core 20 move toward the outlet 16 and stop with the outlet 16, and the outlet 16 is isolated from the valve cavity 14.

Therefore, the elastic force of the second elastic member 13 is greater than the elastic force of the first elastic member 21, so that when the valve core 20 moves from the separation position to the individual position, the second elastic member 13 can overcome the first elastic member 21 and the valve core 20 so that the valve core 20 and the outlet 16 stop to achieve blocking of the outlet 16, so that the solenoid valve 100 can maintain a normally closed state, and the structure and principle of the normally closed solenoid valve 100 are simple, and the structure has good reliability.

Further, as shown in FIG. 1 , the valve core 20 is always kept in the blocking position. When the valve core 20 moves from the blocking position to the connecting position, the movable iron core 12 moves under the magnetic force of the stationary iron core 11 and separates from the valve core 20. The outlet 16 is connected with the storage chamber 22 through the first fluid channel 23. The valve core 20 moves in a direction away from the outlet 16 under the action of the first elastic member 21 to open the outlet 16 so that the outlet 16 is connected with the valve chamber 14. When the valve core 20 is reset from the connecting position to the blocking position, the movable iron core 12 is separated from the stationary iron core 11 under the elastic force of the second elastic member 13, and the movable iron core 12 drives the valve core 20 to move toward the outlet, and the connection between the first fluid channel 23 and the storage chamber 22 is blocked.

According to the solenoid valve 100 of the present invention, the valve core 20 can move toward the outlet 16 under the action of the magnetic core assembly to block the outlet 16, so as to cut off the connection between the inlet 15 and the outlet 16, or the valve core 20 can move in the direction away from the outlet 16 under the action of the first elastic member 21 and separate from the outlet 16 to open the outlet 16, so that the inlet 15 and the outlet 16 are connected through the valve cavity 14; the present application sets a storage cavity 22 inside the valve core 20, and when the valve core 20 needs to be kept in the state of blocking the outlet 16, the storage cavity 22 inside the valve core 20 is easy to form a gap between the first fluid channel 23 A pressure difference is formed, and the pressure in the storage chamber 22 is greater than the pressure in the first fluid channel 23, which can better achieve the blocking of the valve core 20 to the outlet 16; at the same time, when the valve core 20 needs to keep the outlet 16 open, a pressure difference is also formed between the storage chamber 22 inside the valve core 20 and the first fluid channel 23. At this time, the pressure inside the storage chamber 22 is less than the pressure inside the valve chamber 14 and the first fluid channel 23, which can better achieve the valve core 20 to remain in the open state. Therefore, by arranging the storage chamber 22 inside the valve core 20, the reliability and stability of the solenoid valve 100 can be improved.

When the valve core 20 needs to move from the blocking position to the connecting position, the magnetic core assembly is separated from the valve core 20, and the air pressure inside the storage chamber 22 is balanced with the air pressure at the outlet 16 through the first fluid channel 23. The air pressure inside the storage chamber 22 flows to the outlet 16 through the first fluid channel 23, and the flow rate of the first fluid channel 23 per unit time is greater than the flow rate of the second fluid channel 24 flowing into the storage chamber 22, so that the pressure inside the storage chamber 22 and the pressure inside the first fluid channel 23 can be quickly balanced, and the first elastic member 21 can overcome the gravity of the valve core 20 to drive the valve core 20 to move upward to separate the valve core 20 from the outlet 16. Therefore, the provision of the first fluid channel 23 can facilitate balancing the pressure of the storage chamber 22 and the outlet 16 when the valve core 20 is separated from the magnetic core assembly, so that the valve core 20 can be separated from the outlet 16 by using the first elastic member 21, and the structure of the valve core 20 automatically opening is simple, the volume of the solenoid valve 100 is reduced, the assembly process of the solenoid valve 100 is simplified, and the assembly is improved.

Optionally, the valve core 20 is a plastic part. In the prior art, the valve core 20 is a metal part, which is difficult to process, has a large mass, and is costly. The valve core 20 of the present application is a plastic part, which is easier to process. For example, the valve core 20 can be formed into a structure containing a storage cavity 22 and a first flow channel 241 through an injection molding process, so that the side wall thickness of the valve core 20 is uniform and the processing cost is low. The valve core 20 is a plastic part, which can effectively reduce costs and is easier to form, and can facilitate the lightweight design of the solenoid valve 100. When the valve core 20 and the outlet 16 stop, it can effectively reduce the generation of noise, improve the quietness and sealing of the solenoid valve 100, and at the same time, the structure of the injection-molded valve core 20 is simpler, which can ensure the processing accuracy of the valve core 20, and realize the precise installation of the valve core 20 and the valve body 10, and the errors existing in the surface processing affect the movement of the valve core 20 in the valve body 10.

In some embodiments, as shown in FIG. 1 and FIG. 7 , the end of the storage chamber 22 away from the outlet 16 is open, and the second fluid channel 24 includes: at least one first flow channel 241 and at least one second flow channel, the first flow channel 241 is formed on at least one of the outer wall of the valve core 20 and the inner wall of the valve body 10; the second flow channel is defined by the end of the valve core 20 away from the outlet 16 and the inner wall of the valve body 10 away from the outlet 16, and the first flow channel 241 is suitable for communicating with the storage chamber 22 through the second flow channel. Here, the first flow channel 241 is provided on the outer wall of the valve core 20 as an example for explanation, and the fluid inside the valve chamber 14 entering from the inlet 15 flows into the storage chamber 22 along the first flow channel 241 and the second flow channel. Therefore, a first flow channel 241 is provided on the outer wall of the valve core 20, and a second flow channel is provided on the end surface of the valve core 20 away from the outlet 16. The first flow channel 241 is connected with the second flow channel, which can facilitate the communication between the valve cavity 14 and the storage cavity 22 and balance the gas pressure inside the storage cavity 22 and the valve cavity 14. Therefore, the provision of the first flow channel 241 and the second flow channel can make the valve cavity 14 communicate with the storage cavity 22, achieve the balance of the pressure inside the valve cavity 14 and the storage cavity 22, and facilitate the movement of the valve core 20 inside the valve cavity 14. The first flow channel 241 and the second flow channel have simple structures, which is conducive to reducing the cost of achieving the communication between the storage cavity 22 and the valve cavity 14.

In some embodiments, as shown in FIG. 5 , the first flow channel 241 extends along the axial direction of the valve core 20, and the cross-sectional area of the first flow channel 241 gradually decreases in the direction from the end of the valve core 20 adjacent to the outlet 16 toward the end of the valve core 20 away from the outlet 16. The first flow channel 241 extends along the axial direction of the valve core 20 toward the open end of the valve core 20, and the cross-sectional area of the first flow channel 241 adjacent to the open end gradually decreases. Thus. The first flow channel 241 extends along the axial direction of the valve core 20, and the cross-sectional area gradually decreases in the direction away from the outlet 16, which can increase the flow rate of the fluid when entering the storage chamber 22, and improve the structural strength of the open end of the valve core 20.

Further, as shown in FIG. 5 , the first flow channel 241 is a groove formed on the outer side wall of the valve core 20, and the distance between the two side walls of the first flow channel 241 gradually decreases along the direction from the end of the valve core 20 adjacent to the outlet 16 toward the end of the valve core 20 away from the outlet 16. That is, the distance between the two side walls of the groove formed on the first flow channel 241 in the circumferential direction of the valve core 20 gradually decreases along the axial direction of the valve core 20 in the direction away from the outlet 16. Thus, the side wall of the first flow channel 241 can have a guiding function, facilitating the flow of fluid to the second flow channel. At the same time, the cross-sectional area of the first flow channel 241 can be gradually reduced by gradually approaching the two side walls, which can increase the flow rate of the fluid flowing out of the first flow channel 241 and ensure the structural strength of the valve core 20.

In some embodiments, as shown in FIG. 5 and FIG. 6 , along the direction from the end of the valve core 20 adjacent to the outlet 16 toward the end of the valve core 20 away from the outlet 16, the bottom wall of the first flow channel 241 extends obliquely toward the direction away from the central axis of the valve core 20, and the bottom wall is connected to the two side walls on both sides of the circumferential direction of the valve core 20. That is, the bottom wall of the first flow channel 241 is a part of the side wall of the valve core 20, and the side wall of the valve core 20 extends obliquely from bottom to top along the axial direction of the valve core 20 toward the direction away from the center of the valve core 20. Therefore, the oblique extension of the first flow channel 241 can increase the gap between the valve core 20 and the valve body 10, facilitate the flow of fluid from the first flow channel 241 to the storage chamber 22, reduce the possibility of contact between the valve core 20 and the valve body 10, and reduce the friction between the valve core 20 and the valve body 10 that may cause wear of the valve core 20 or the valve body 10. Of course, in this embodiment, while the side walls of the first flow channel 241 gradually approach from bottom to top along the axial direction of the valve core 20, the bottom wall of the first flow channel 241 extends obliquely from bottom to top along the axial direction of the valve core 20 gradually away from the center of the valve core 20.

In some embodiments, one end of the valve core 20 away from the outlet 16 is spaced apart from the inner wall of the valve body 10 away from the outlet 16 to define a second flow channel. Thus, the valve core 20 and the valve body 10 define a second flow channel on the side away from the outlet 16, so that the second flow channel is connected to the first flow channel 241, so that the fluid entering the valve cavity 14 can flow into the storage cavity 22 through the first flow channel 241 and the second flow channel.

In some embodiments, in conjunction with FIG. 1 and FIG. 6 , at least one first rib 25 extending along the circumference of the valve core 20 is provided at one end of the valve core 20 away from the outlet 16, and a communication channel 251 is formed on the first rib 25 and penetrates through both side surfaces of the first rib 25 along the radial direction of the valve core 20, and the storage chamber 22 is communicated with the inlet 15 through the communication channel 251. A plurality of first ribs 25 are arranged at intervals along the circumferential direction of the valve core 20 on the end surface of the end of the valve core 20 away from the outlet 16, and two adjacent first ribs 25 brackets define a communication channel 251; the number of the first rib 25 is one, and one first rib 25 can extend along the circumference of the valve core 20, and the communication channel 251 can penetrate through the first rib 25 so that the inside of the storage chamber 22 can be communicated with the valve chamber 14 through the communication channel 251. Therefore, the setting of the first rib 25 facilitates the formation of the connecting channel 251, so that the fluid flows between the valve chamber 14 and the storage chamber 22 through the first flow channel 241 and the connecting channel 251, thereby increasing the convenience of flow, and the first rib 25 can reduce the difficulty of setting the connecting channel 251.

In some embodiments, as shown in FIG. 5 , the width of the first rib 25 is smaller than the wall thickness of the end of the valve core 20 away from the outlet 16, and the surface of the first rib 25 adjacent to the central axis of the valve core 20 is flush with the inner wall surface of the valve core 20. When the first rib 25 is arranged on the end surface of the open end of the valve core 20, the wall thickness of the first rib 25 along the radial direction of the valve core 20 is smaller than the wall thickness of the side wall of the valve core 20 in the radial direction, so that the convenience and reliability of assembly of the valve core 20 when the valve core 20 stops at the valve body 10 are increased. Therefore, the width of the first rib 25 is small, which can facilitate the installation of the valve core 20 and the valve body 10, and the valve core 20 can stop on the valve body 10 smoothly, avoiding the reduction of the sealing when the valve core 20 stops at the valve body 10, and the first rib 25 is convenient for the arrangement of the second flow channel.

In some embodiments, as shown in Fig. 5, there are multiple first flow channels 241 and multiple communication channels 251, and the multiple first flow channels 241 and multiple communication channels 251 are respectively arranged at intervals along the circumference of the valve core 20. Therefore, the multiple first flow channels 241 and multiple communication channels 251 are arranged at intervals along the circumference of the valve core 20, so that the fluid entering the valve cavity 14 can quickly flow into the storage cavity 22 through the first flow channels 241 and the communication channels 251 from multiple directions, thereby increasing the liquid inflow rate of the storage cavity 22, so that the valve core 20 can move from the isolation position to the communication position in time.

Optionally, as shown in Fig. 5, the number of the first flow channels 241 is greater than the number of the connecting channels 251. Thus, the number of the first flow channels 241 is greater than the number of the connecting channels 251, and the fluids in the plurality of first flow channels 241 are gathered and flow to the connecting channels 251, which facilitates the fluid in the valve cavity 14 to enter the storage cavity 22, and increases the flow rate of the fluid when entering the storage cavity 22.

In some embodiments, as shown in FIG. 5 and FIG. 7 , a valve core extension portion 26 extending along the axial direction of the valve core 20 is provided in the storage chamber 22, and a first fluid channel 23 is defined in the valve core extension portion 26. The first fluid channel 23 runs through both ends of the valve core extension portion 26 so as to be respectively connected to the storage chamber 22 and the outlet 16, and the movable iron core 12 is detachably matched with an end of the extension portion adjacent to the movable iron core 12. The valve core extension portion 26 is located in the storage chamber 22 and extends along the axial direction of the valve core 20. One end of the valve core extension portion 26 is connected to an end of the valve core 20 adjacent to the outlet 16, and the other end of the valve core 20 is opposite to the movable iron core 12. When the valve core 20 is in the connecting position, the movable iron core 12 stops against the valve core extension portion 26, and the valve core 20 is separated from the outlet 16. When the valve core 20 moves from the connecting position to the disconnecting position, the second elastic member 13 moves toward the outlet 16 against the movable iron core 12 and the valve core 20, and overcomes the first elastic member 21. The elastic force makes the valve core 20 stop against the outlet 16; when the valve core 20 moves from the blocking position to the connecting position, the movable iron core 12 moves upward, the movable iron core 12 is separated from the valve core extension 26, the first fluid channel 23 located in the valve core extension 26 is opened, and the fluid inside the storage chamber 22 flows to the outlet 16 through the first fluid channel 23 defined in the valve core extension 26, so that the pressure inside the storage chamber 22 is balanced with the pressure at the outlet 16, and the first elastic member 21 drives the valve core 20 to move upward to connect the inlet 15 with the outlet 16. In addition, in order to facilitate the stop between the movable iron core 12 and the valve core extension 26, the valve core extension 26 extends out of the open end of the storage chamber 22 in the axial direction of the valve core 20, which can shorten the stroke of the movable iron core 12, so that the movable iron core 12 can stop against the valve core 20 in a timely and effective manner, thereby improving the efficiency of the movement of the valve core 20.

Therefore, a valve core extension portion 26 is arranged inside the storage chamber 22, and the valve core extension portion 26 defines a first fluid channel 23, so that the moving iron core 12 drives the valve core 20 to move downward by abutting against the valve core extension portion 26. The first fluid channel 23 can connect the storage chamber 22 and the outlet 16, so that the first elastic member 21 can overcome the gravity of the valve core 20 to move the valve core 20 upward to open the outlet 16, thereby realizing the connection between the inlet 15 and the outlet 16.

In some embodiments, referring to Fig. 1 and Fig. 8, a pressure relief member 27 is provided at one end of the valve core extension 26 adjacent to the moving iron core 12, and at least one pressure relief hole 271 is formed on the pressure relief member 27. When the moving iron core 12 is separated from the end of the valve core extension 26 adjacent to the moving iron core 12, the storage chamber 22 is connected to the first fluid channel 23 through the pressure relief hole 271. The pressure relief member 27 is provided at the open end of the valve core extension 26 adjacent to the valve core 20, and the pressure relief member 27 is detachably connected to the valve core extension 26. When the moving iron core 12 and the valve core extension 26 are stopped, the pressure relief member 27 is located between the moving iron core 12 and the valve core extension 26. When the moving iron core 12 and the valve core extension 26 are separated, the fluid inside the storage chamber 22 flows into the first fluid channel 23 through the pressure relief hole 271 of the pressure relief member 27 and then flows out. Therefore, a pressure relief member 27 is provided at the other end of the valve core extension portion 26, which can reduce the sound when the fluid inside the storage chamber 22 flows to the first fluid channel 23, improve the quietness when the air pressure inside the storage chamber 22 and the outlet 16 are balanced, and improve the user experience.

Optionally, the pressure relief member 27 is a pressure relief cover, and the pressure relief member 27 is provided at one end of the valve core extension 26 adjacent to the moving iron core 12. Thus, the pressure relief member 27 is a pressure relief cover, which can facilitate the installation of the pressure relief member 27 and the valve core extension 26 and improve the efficiency of the installation.

In some embodiments, as shown in FIG8 , a plurality of positioning ribs 272 are provided on the inner side wall of the pressure relief member 27 at intervals along the circumference of the pressure relief member 27 , and each positioning rib 272 extends along the axial direction of the valve core 20 ; or, as shown in FIG9 , the pressure relief member 27 is interference fit with one end of the valve core extension 26 adjacent to the moving iron core 12 . That is, the pressure relief member 27 can be directly sleeved on the end of the valve core extension 26 away from the outlet 16 . Thus, the provision of a plurality of positioning ribs 272 can increase the reliability and tightness of the installation of the pressure relief member 27 and the valve core extension 26 , and at the same time facilitate disassembly and replacement due to wear during long-term use.

According to some embodiments of the present invention, the pressure relief member 27 includes a first pressure relief portion and a second pressure relief portion, the second pressure relief portion is connected to the side of the first pressure relief portion away from the moving iron core 12, the first pressure relief portion is arranged on the end face of the valve core extension portion 26 adjacent to the moving iron core 12, the second pressure relief portion is fitted in the first fluid channel 23, the cross-sectional area of the first pressure relief portion is greater than the cross-sectional area of the second pressure relief portion, and the pressure relief hole 271 passes through the first pressure relief portion and the second pressure relief portion. Therefore, the provision of the first pressure relief portion and the second pressure relief portion facilitates the installation of the pressure relief member 27 and the valve core extension portion 26, improves the installation efficiency and the installation reliability, and at the same time, the moving iron core 12 stops on the pressure relief member 27 to ensure the sealing inside the storage cavity 22.

Further, as shown in FIG8 and FIG9 , there are multiple pressure relief holes 271, and the multiple pressure relief holes 271 are arranged at intervals on the pressure relief member 27. The pressure relief holes 271 are arranged on the first pressure relief portion. Thus, the design of the multiple pressure relief holes 271 can effectively ensure the rate of pressure relief, so that the pressure inside the storage chamber 22 and the pressure at the outlet 16 can be quickly balanced, so that the valve core 20 can be moved from the isolation position to the connection position in time.

In some embodiments, the pressure relief hole 271 is a circular hole, and the diameter of the pressure relief hole 271 is d, where d satisfies: 0.4mm≤d≤1mm. For example, d=0.5mm. If the diameter is less than 0.4mm, the speed of the fluid flow may be reduced due to the small aperture, which increases the time for the internal pressure of the storage chamber 22 and the valve chamber 14 to reach equilibrium, affecting the user experience; if the diameter is greater than 1mm, the fluid may generate noise when flowing due to the large aperture, and the silencing effect is not good. Therefore, the pressure relief hole 271 is a circular hole, which is convenient for design and manufacturing and reduces the difficulty of the manufacturing process, and the diameter is controlled within the above range, so that the fluid can flow into the first fluid channel 23 while increasing the quietness of the fluid flow.

In some embodiments, the pressure relief member 27 is a plastic member or a soft rubber member 29. Therefore, the pressure relief member 27 is a plastic member or a soft rubber member 29, so that the moving iron core 12 can have a buffering and vibration reduction effect when it stops against the valve core extension 26, avoiding the moving iron core 12 and the valve core extension 26 from hard contact, thereby improving the quiet effect.

In some embodiments, as shown in FIG. 2 , the valve body 10 comprises: a body 101, a valve seat 102, an end of the body 101 away from the moving iron core 12 is open, an inlet 15 is formed on the body 101, the valve seat 102 is arranged at the end of the body 101 away from the moving iron core 12, a valve cavity 14 is defined between the valve seat 102 and the body 101, and an outlet 16 is formed on the valve seat 102. The valve core 20 is arranged in the valve cavity 1411 defined by the valve seat 102 and the body 101, and can move up and down along the axial direction of the body 101. When the valve core 20 moves upward and is located in the connecting position, the fluid enters the valve cavity 14 from the inlet 15 and flows out from the outlet 16, and the fluid flow rate can be adjusted by adjusting the position of the valve core 20. The body 101 is an integrally formed part, so that the valve core 20 can maintain a high coaxiality with the valve body 10. Therefore, the arrangement of the main body 101 and the valve seat 102 facilitates the formation of the valve cavity 14, and an inlet 15 is formed on the valve seat 102 to enable the inlet 15 to be connected with the outlet 16 through the valve cavity 14. The structure of the valve body 10 is relatively simple, which can avoid the valve core 20 from rubbing against the side wall of the main body 101 when moving inside the valve cavity 14.

In some embodiments, in combination with Figures 1 and 7, the valve core 20 includes: a first valve core segment 201 and a second valve core segment 202, the second valve core segment 202 is connected to the end of the first valve core segment 201 away from the outlet 16, the cross-sectional area of the second valve core segment 202 is larger than the cross-sectional area of the first valve core segment 201 to form a step portion 28 between the first valve core segment 201 and the second valve core segment 202, one end of the first elastic member 21 is stopped against the step portion 28, and the first elastic member 21 and the outer peripheral surface of the first valve core segment 201 are spaced apart from each other. One end of the first elastic member 21 abuts against the step portion 28, and the other end of the first elastic member 21 abuts against the valve seat 102. The first elastic member 21 is sleeved outside the first valve core 20 seat, and the first elastic member 21 does not contact the first valve core 20 seat, that is, the cross-sectional area of the first elastic member 21 is greater than the cross-sectional area of the first valve core section 201, and the cross-sectional areas of the first elastic member 21 along the axial direction of the valve core 20 are equal. When the valve core 20 moves up and down relative to the valve seat 102, the first valve core section 201 does not contact the first elastic member 21, thereby avoiding friction between the valve core 20 and the first elastic member 21 during movement, and reducing the generation of abnormal noise. Therefore, a step portion 28 is formed between the first valve core section 201 and the second valve core section 202, which is convenient for the installation and abutment of the first elastic member 21. One end of the first elastic member 21 abuts against the step portion 28, and the other end can abut against the valve seat 102 or the inner wall of the valve cavity 14. Different assembly methods and different shapes of the first elastic member 21 can be selected according to design requirements.

In some embodiments, the first elastic member 21 is spaced apart from the outer circumference of the first valve core segment 201. Thus, the first elastic member 21 and the first valve core segment 201 are spaced apart from each other, so that the friction between the valve seat 10213 and the first elastic member 2130 during the relative movement can be avoided, which may cause the valve seat 10213 or the first elastic member 2130 to wear, thereby increasing the service life of the first valve core segment 20127 and the first elastic member 2130.

In some embodiments, as shown in Figures 2 and 4, the valve seat 102 includes a first valve seat mating portion 1021 and a valve seat extension portion 1022 connected to each other along the axial direction of the valve body 10, the valve seat extension portion 1022 is located on the side of the first valve seat mating portion 1021 away from the valve core 20, the cross-sectional area of the valve seat extension portion 1022 is larger than the cross-sectional area of the first valve seat mating portion 1021 to define a first step portion 1023 between the valve seat extension portion 1022 and the first valve seat mating portion 1021, and the end of the first elastic member 21 away from the moving iron core 12 stops at the first step portion 1023.

The valve seat 102 has a first valve seat matching portion 1021 extending toward the valve core 20. The outer peripheral surface of the first valve seat matching portion 1021 is located on the side of the outer peripheral surface of the first valve core section 201 away from the central axis of the valve core 20. The first elastic member 21 is sleeved on the outer peripheral surface of the first valve seat matching portion 1021. One end of the first elastic member 21 is sleeved outside the first valve core section 201, and the other end of the first elastic member 21 is sleeved outside the first valve seat matching portion 1021 and abuts against the first step portion 1023. The valve seat extension portion 1022 is provided on the outer peripheral side of the first valve seat matching portion 1021 and is lower than the surface of the first valve seat matching portion 1021 adjacent to the valve core 20. The other end of the first elastic member 21 abuts against the valve seat extension portion 1022, which facilitates the installation and fixation of the first elastic member 21. Therefore, the first valve seat matching portion 1021 can limit the first elastic member 21 to prevent the first elastic member 21 from moving in the radial direction of the valve core 20, so that the first valve core segment 201 and the first elastic member 21 can move along the axial direction of the valve core 20, increase the stability of the first elastic member 21 during the up and down movement, facilitate the installation of the first elastic member 21, and prevent the first elastic member 21 from contacting the first valve core segment 201 or the inner wall of the valve cavity 14 during movement to cause abnormal noise.

In some embodiments, referring to Fig. 1, the inner circumference of the first elastic member 21 abuts against the outer circumference of the first valve seat matching portion 1021. Thus, the inner circumference of the first elastic member 21 abuts against the outer circumference of the first valve seat matching portion 1021, so as to achieve a tight fit between the first elastic member 21 and the first valve seat matching portion 1021, facilitate the installation and positioning of the first elastic member 21, and improve the installation efficiency of the first elastic member 21.

In some embodiments, as shown in Figure 4, the valve seat extension portion 1022 includes a first valve seat extension portion 10221 and a second valve seat extension portion 1022 connected to each other along the axial direction of the valve core 20, the second valve seat extension portion 1022 is located on the side of the first valve seat extension portion 10221 away from the first valve seat mating portion 1021, the first valve seat extension portion 10221 is mated in the valve body 10, the end of the first elastic member 21 away from the moving iron core 12 stops against the first valve seat extension portion 10221, and the second valve seat extension portion 1022 stops against the end face of one end of the valve body 10. That is, the first valve seat extension portion 10221 and the second valve seat extension portion 1022 are arranged along the radial direction of the valve core 20, and the first valve seat extension portion 10221 is arranged adjacent to the first valve seat matching portion 1021, the above-mentioned other end of the first elastic member 21 stops against the upper surface of the first valve seat extension portion 10221, and the second valve seat extension portion 1022 is lower than the surface of the first valve seat extension portion 10221 adjacent to the valve core 20 along the axial direction of the valve core 20. When the valve seat 102 is assembled with the main body 101, one end of the main body 101 stops against the second valve seat extension portion 1022, and the width of the second valve seat extension portion 1022 protruding from the outer peripheral side of the first valve seat extension portion 10221 along the radial direction of the valve core 20 is equal to the thickness of the side wall of the main body 101. Therefore, the setting of the first valve seat extension portion 10221 and the second valve seat extension portion 1022 facilitates the installation of the first elastic member 21 to form a limit for the first elastic member 21, and at the same time facilitates the installation of the main body 101 and the valve seat 102, simplifies the installation structure of the main body 101 and the valve seat 102, and improves the installation efficiency of the main body 101 and the valve seat 102.

In some embodiments, as shown in FIG. 2 and FIG. 4 , a second valve seat fitting portion 1024 is provided on a side of the valve seat extension portion 1022 away from the first valve seat fitting portion 1021, and a first sealing member 1025 is provided on the outer surface of the second valve seat fitting portion 1024. The second valve seat fitting portion 1024 and the first valve seat fitting portion 1021 are arranged along the axial direction of the valve core 20, and the valve seat extension portion 1022 is arranged outside the first valve seat fitting portion 1021 and the second valve seat fitting portion 1024 along the radial direction of the valve core 20. The first valve seat fitting portion 1021, the second valve seat fitting portion 1024 and the valve seat extension portion 1022 can be formed into a rotating body structure through an integrated molding process, so as to facilitate the coaxiality of the first valve seat fitting portion 1021 and the second valve seat fitting portion 1024, simplify the processing process of the valve seat 102, improve the processing accuracy of the valve seat 102, and facilitate the miniaturized design and manufacturing of the valve seat 102. A sealing groove is formed on the outer surface of the second valve seat fitting portion 1024 and extends along the circumference of the valve core 20. A first sealing member 1025 is arranged in the sealing groove. When the valve seat 102 is assembled with an external system such as the oil circuit body 101, the first sealing member 1025 can increase the sealing performance of the installation.

In some embodiments, as shown in Figure 2, the body 101 has a first chamber 1011 and a second chamber 1012 which are connected to each other along the axial direction of the valve core 20, the first chamber 1011 is located on the side of the second chamber 1012 away from the valve seat 102, the cross-sectional area of the second chamber 1012 is larger than the cross-sectional area of the first chamber 1011, the first valve core segment 201 is fitted in the first chamber 1011, the second valve core segment 202 is located in the second chamber 1012, and the inlet 15 is formed on the side wall of the second chamber 1012. The first chamber 1011 and the second chamber 1012 are arranged along the axial direction of the valve core 20, and the first chamber 1011 is located at one end of the second chamber 1012 away from the valve seat 102. When the body 101 cooperates with the valve core 20, the second valve core section 202 cooperates with the first chamber 1011 and moves up and down along the first chamber 1011. The first chamber 1011 has a guiding effect on the valve core 20. The first valve core section 201 is located in the second chamber 1012. The cross-sectional area of the second chamber 1012 is larger than the cross-sectional area of the first chamber 1011. An inlet 15 is arranged on the side wall of the second chamber 1012, so that the fluid entering the inlet 15 is located in the valve cavity 14, and the inlet 15 can be arranged adjacent to the outlet 16, so as to facilitate the communication between the inlet 15 and the outlet 16. Therefore, the first chamber 1011 and the second chamber 1012 have different cross-sectional areas, which is convenient for forming a limit and guide for the first valve core section 201, so that the valve seat 102 can move smoothly in the first chamber 1011. The second chamber 1012 has a larger cross-sectional area, which is convenient for the valve core 20 to stop at the outlet 16 and the fluid enters the valve chamber 14 and flows toward the storage chamber 22.

In some embodiments, as shown in Figures 6 and 7, the surface of the valve core 20 suitable for abutting against the valve seat 102 is formed as an arc surface. Thus, the surface of the valve core 20 adjacent to the outlet 16 is an arc surface, which can facilitate the abutment between the valve core 20 and the outlet 16, increase the sealing between the valve core 20 and the outlet 16, and increase the convenience of the abutment between the valve core 20 and the outlet 16.

In some embodiments, referring to FIG. 3 , the outer peripheral surface of one end of the body 101 adjacent to the moving iron core 12 has a plurality of clamping surfaces 1013 arranged along the circumference of the body 101. The plurality of clamping surfaces 1013 are arranged at intervals along the circumference of the valve core 20, so that the body 101 and an external device such as a wrench can be matched to realize the installation of the body 101 and the external oil circuit. Therefore, the clamping surface 1013 is provided on the body 101, so that the body 101 can be clamped to drive the body 101 to rotate to realize the installation of the body 101.

Optionally, the first elastic member 21 is a spring. For example, the first elastic member 21 is one of a round wire spring, a flat wire spring, a cylindrical spring and a conical spring. Here, a conical spring is taken as an example. As shown in FIG. 10 , the first elastic member 21 gradually decreases in the direction away from the valve seat 102 along the axial direction of the valve core 20, and one end of the first elastic member 21 abuts against the step portion 28, and the other end abuts against the inner wall of the valve cavity 14. A support rib 10121 is provided on the inner wall of the valve cavity 14, and the support rib 10121 can extend along the circumferential direction of the valve core 20, and the other end of the first elastic member 21 abuts against the support rib 10121. There can also be two support ribs 10121, and the two support ribs 10121 are arranged at intervals in the circumferential direction of the valve core 20 and are opposite to each other in the radial direction of the valve core 20. The support rib 10121 is arranged above the inlet 15 to prevent the incoming fluid from directly contacting the first elastic member 21, thereby increasing the service life of the first elastic member 21. Therefore, the first elastic member 21 is a spring, which can make the first elastic member 21 have good elasticity, making it easy for the valve core 20 to move from the isolation position to the connection position. At the same time, it can effectively reduce the production cost of the solenoid valve 100 and reduce the cost of later use and maintenance of the solenoid valve 100.

In some embodiments, as shown in FIG. 7 , at least the portion of the valve core 20 that matches the outlet 16 is provided with a soft rubber member 29, which can be embedded or sleeved on the surface of the valve core 20 on one side adjacent to the outlet 16. Thus, by providing the soft rubber member 29 on the portion of the valve core 20 that matches the outlet 16, the sealing performance of the valve core 20 and the outlet 16 can be increased, and abnormal noise caused by the hard contact between the valve core 20 and the outlet 16 can be avoided, which is beneficial to improving the quietness of the solenoid valve 100 during use.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In the description of the present invention, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. In the description of the present invention, a first feature "above", "above" and "above" a second feature may include the first feature being directly above and obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims (38)

1. A solenoid valve, comprising: A valve body, wherein a magnetic core assembly is disposed on the valve body, a valve cavity is defined in the valve body, an inlet and an outlet are formed on the valve body, and the inlet is communicated with the valve cavity; a valve core, the valve core being arranged in the valve cavity and between the outlet and the magnetic core assembly, the valve core being movable toward the outlet under the action of the magnetic core assembly to block the outlet so as to cut off the communication between the valve cavity and the outlet, the valve core being provided with a storage cavity and a first fluid channel, the first fluid channel being communicated with the outlet, and the storage cavity being communicated with the valve cavity when the valve core blocks the outlet; A first elastic member is disposed between the valve body and the valve core. Under the action of the first elastic member, the valve core can move in a direction away from the outlet to open the outlet so that the outlet is connected to the valve cavity. 2. The solenoid valve according to claim 1, characterized in that: The valve core can move between a connecting position and a disconnecting position, and at least one second fluid channel is provided between the valve core and the valve body; When the valve core is located at the blocking position, the valve core blocks the outlet to block the communication between the inlet and the outlet, the storage chamber is connected to the valve chamber, and the external fluid is suitable for flowing to the storage chamber through the inlet and the second fluid channel; When the valve core is located at the communication position, the valve core is separated from the outlet so that the inlet and the outlet are communicated with each other, and the communication between the storage chamber and the valve chamber is blocked. 3. The solenoid valve according to claim 2, characterized in that the magnetic core assembly comprises: A sleeve, the sleeve being fixed to an end of the valve body away from the valve core; A moving iron core, at least a part of which is disposed in the sleeve, and the moving iron core can move relative to the valve body in the sleeve; A static iron core, the static iron core is arranged in the sleeve and is located on a side of the moving iron core away from the valve core; A second elastic member, wherein the second elastic member is arranged between the static iron core and the moving iron core. 4. The solenoid valve according to claim 3, characterized in that the valve core is always kept in the blocking position; In the process of the valve core moving from the blocking position to the connecting position, the movable iron core moves and separates from the valve core under the magnetic force of the static iron core, the outlet is connected with the storage chamber through the first fluid channel, and the valve core moves in a direction away from the outlet under the action of the first elastic member to open the outlet so that the outlet and the valve chamber are connected. When the valve core is reset from the connecting position to the disconnecting position, the moving iron core is separated from the stationary iron core under the elastic force of the second elastic member, and the moving iron core drives the valve core to move toward the outlet, and the connection between the first fluid channel and the storage chamber is disconnected. 5. The solenoid valve according to claim 4, characterized in that: When the valve core is located at the blocking position, the second elastic member acts on the valve core through the movable iron core so that the valve core blocks the outlet to block the connection between the inlet and the outlet; When the valve core is located at the communication position, the valve core is separated from the outlet under the action of the first elastic member to enable the communication between the inlet and the outlet; The elastic force of the second elastic member is greater than the elastic force of the first elastic member. The solenoid valve according to claim 1 , wherein the valve core is a plastic part. 7. The solenoid valve according to claim 2, characterized in that one end of the storage chamber away from the outlet is open; The second fluid channel comprises: at least one first flow channel formed on at least one of an outer side wall of the valve core and an inner side wall of the valve body; At least one second flow channel, the second flow channel is defined by an end of the valve core away from the outlet and an inner wall of the valve body away from the outlet, and the first flow channel is suitable for communicating with the storage chamber through the second flow channel. 8. The solenoid valve according to claim 7 is characterized in that the first flow channel extends along the axial direction of the valve core, and the cross-sectional area of the first flow channel gradually decreases in the direction from the end of the valve core adjacent to the outlet toward the end of the valve core away from the outlet. 9. The solenoid valve according to claim 8, characterized in that the first flow channel is a groove formed on the outer side wall of the valve core; A distance between two side walls of the first flow channel gradually decreases along a direction from an end of the valve core adjacent to the outlet toward an end of the valve core away from the outlet; and/or In a direction from an end of the valve core adjacent to the outlet toward an end of the valve core away from the outlet, a bottom wall of the first flow passage extends obliquely toward a direction away from a central axis of the valve core. 10 . The solenoid valve according to claim 7 , wherein an end of the valve core away from the outlet is spaced apart from an inner wall of the valve body away from the outlet to define the second flow channel. 11. The solenoid valve according to claim 7 is characterized in that an end of the valve core away from the outlet is provided with at least one first rib extending along the circumference of the valve core, and a connecting channel is formed on the first rib and penetrates the two side surfaces of the first rib along the radial direction of the valve core, and the storage chamber is connected with the inlet through the connecting channel. 12. The solenoid valve according to claim 11, characterized in that the width of the first rib is smaller than the wall thickness of the end of the valve core away from the outlet, and the surface of the first rib adjacent to the central axis of the valve core is flush with the inner wall surface of the valve core. 13 . The solenoid valve according to claim 11 , wherein the first flow passage and the communication passage are plural in number, and the plural first flow passages and the plural communication passages are arranged at intervals along the circumferential direction of the valve core. 14 . The solenoid valve according to claim 13 , wherein the number of the first flow channels is greater than the number of the communication channels. 15. The solenoid valve according to claim 3 is characterized in that a valve core extension portion extending along the axial direction of the valve core is provided in the storage chamber, the first fluid channel is defined in the valve core extension portion, the first fluid channel passes through both ends of the valve core extension portion so as to be suitable for communicating with the storage chamber and the outlet respectively, and the moving iron core is detachably matched with an end of the extension portion adjacent to the moving iron core. 16. The solenoid valve according to claim 15, characterized in that a pressure relief member is provided at the end of the valve core extension portion adjacent to the moving iron core, and at least one pressure relief hole is formed on the pressure relief member. When the moving iron core is separated from the end of the valve core extension portion adjacent to the moving iron core, the storage chamber is communicated with the first fluid channel through the pressure relief hole. 17 . The solenoid valve according to claim 16 , wherein the pressure relief member is a pressure relief cover, and the pressure relief member cover is disposed on the one end of the valve core extension portion adjacent to the moving iron core. 18. The solenoid valve according to claim 17, characterized in that a plurality of positioning ribs are arranged at intervals along the circumference of the pressure relief member on the inner side wall of the pressure relief member; or The pressure relief member is interference-fitted with the end of the valve core extension portion adjacent to the moving iron core. 19. The solenoid valve according to claim 16 is characterized in that the pressure relief member includes a first pressure relief portion and a second pressure relief portion, the second pressure relief portion is connected to a side of the first pressure relief portion away from the moving iron core, the first pressure relief portion is arranged on an end face of the valve core extension portion adjacent to the one end of the moving iron core, the second pressure relief portion is fitted in the first fluid channel, and the pressure relief hole passes through the first pressure relief portion and the second pressure relief portion. 20 . The solenoid valve according to claim 16 , wherein there are a plurality of pressure relief holes, and the plurality of pressure relief holes are spaced apart from each other on the pressure relief member. 21 . The solenoid valve according to claim 16 , wherein the pressure relief hole is a circular hole, and a diameter of the pressure relief hole is d, wherein d satisfies: 0.4 mm≤d≤1 mm. 22. The solenoid valve according to claim 16, characterized in that the pressure relief component is a plastic component or a soft plastic component. 23. The solenoid valve according to claim 1, wherein the valve body comprises: A body, wherein one end of the body away from the magnetic core assembly is open, and the inlet is formed on the body; A valve seat is arranged at the end of the body away from the magnetic core component, the valve seat and the body together define the valve cavity, and the valve seat is formed with the outlet. 24. The solenoid valve according to claim 23, wherein the valve core comprises: A first valve core section; A second valve core section, wherein the second valve core section is connected to an end of the first valve core section away from the outlet, the cross-sectional area of the second valve core section is larger than the cross-sectional area of the first valve core section so as to form a step portion between the first valve core section and the second valve core section, and one end of the first elastic member abuts against the step portion. 25 . The solenoid valve according to claim 24 , wherein the first elastic member and an outer circumferential surface of the first valve core segment are spaced apart from each other. 26. The solenoid valve according to claim 24 is characterized in that the valve seat comprises a first valve seat fitting portion and a valve seat extension portion which are connected to each other along the axial direction of the valve body, the valve seat extension portion is located on the side of the first valve seat fitting portion away from the valve core, the cross-sectional area of the valve seat extension portion is larger than the cross-sectional area of the first valve seat fitting portion to define a first step portion between the valve seat extension portion and the first valve seat fitting portion, and an end of the first elastic member adjacent to the outlet stops at the first step portion. 27 . The solenoid valve according to claim 26 , wherein an inner circumferential surface of the first elastic member abuts against an outer circumferential surface of the first valve seat matching portion. 28. The solenoid valve according to claim 26 is characterized in that the valve seat extension portion includes a first valve seat extension portion and a second valve seat extension portion connected to each other along the axial direction of the valve core, the second valve seat extension portion is located on a side of the first valve seat extension portion away from the first valve seat matching portion, the first valve seat extension portion is matched in the valve body, one end of the first elastic member adjacent to the outlet is stopped against the first valve seat extension portion, and the second valve seat extension portion is stopped against the end surface of the one end of the valve body. 29. The solenoid valve according to claim 26, characterized in that a second valve seat fitting portion is provided on a side of the valve seat extension portion away from the first valve seat fitting portion, and a first sealing member is provided on an outer surface of the second valve seat fitting portion. 30. The solenoid valve according to claim 24 is characterized in that the body has a first chamber and a second chamber connected to each other along the axial direction of the valve core, the first chamber is located on the side of the second chamber away from the valve seat, the cross-sectional area of the second chamber is larger than the cross-sectional area of the first chamber, the first valve core section is fitted in the first chamber, the second valve core section is located in the second chamber, and the inlet is formed on the side wall of the second chamber. 31. The solenoid valve according to claim 23, characterized in that the surface of the valve core suitable for abutting against the valve seat is formed as an arc surface. 32 . The solenoid valve according to claim 23 , wherein an outer peripheral surface of an end of the body away from the outlet has a plurality of clamping surfaces arranged along a circumferential direction of the body. 33. The solenoid valve according to claim 23, characterized in that the body is an integrally formed part. 34. The solenoid valve according to claim 23, characterized in that the valve seat is a rotating body structure. 35. The solenoid valve according to claim 1, wherein the first elastic member is a spring. 36. The solenoid valve according to claim 35, characterized in that the first elastic member is a round wire spring or a flat wire spring. 37. The solenoid valve according to claim 36, characterized in that the first elastic member is a cylindrical spring or a conical spring. 38. The solenoid valve according to any one of claims 1 to 37, characterized in that at least the portion of the valve core that cooperates with the outlet is provided with a soft rubber part.