CN116838842A

CN116838842A - Electromagnetic valve

Info

Publication number: CN116838842A
Application number: CN202210303329.XA
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Dunan Automotive Thermal Management Technology Co Ltd
Current assignee: Dunan Automotive Thermal Management Technology Co Ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2023-10-03

Abstract

The present application provides a solenoid valve, comprising: the valve body is provided with a containing cavity and a valve port, and the valve port is arranged at one end of the valve body and is communicated with the containing cavity; the static core iron is arranged in the accommodating cavity and is opposite to the valve port; the movable core iron is movably arranged in the accommodating cavity and is provided with a first end and a second end which are oppositely arranged, the first end is in force fit with the static core iron, and the second end is arranged towards the valve port; the valve core is positioned in the accommodating cavity and is movably arranged at the second end of the movable core iron, the valve core is used for opening or closing the valve port, and when the movable core iron moves towards the position close to the static core iron, the valve core has a static state and a motion state of synchronously moving with the movable core iron; the valve core is arranged at the valve opening, and is positioned at the valve opening, wherein the valve core is arranged at the valve opening, and the valve core is arranged at the valve opening.

Description

Electromagnetic valve

Technical Field

The application relates to the technical field of valves, in particular to an electromagnetic valve.

Background

Currently, normally closed solenoid valves typically include a valve body, a stationary core iron, a moving core iron, and a valve spool assembly. The valve body is provided with a containing cavity and a valve port communicated with the containing cavity, the static core iron, the movable core iron and the valve core component are all arranged in the containing cavity and distributed along the axial direction of the containing cavity, and the movable core iron and the valve core component are all movably arranged in the containing cavity. The movable core iron and the static core iron are matched to enable the valve core to close the valve port or open the valve port.

However, in the existing normally closed electromagnetic valve, the movable core iron needs to drive the valve core assembly to move in the whole valve opening process, so that the pressure difference force which needs to be overcome by the movable core is large in the valve opening process, and further the valve opening difficulty of a product is large.

Disclosure of Invention

The application provides an electromagnetic valve, which aims to solve the problem of high difficulty in valve opening in the prior art.

When the technical scheme of the application is applied, the valve core keeps static in the process of moving the moving core iron from the initial position to the matching position when the valve is opened, and the moving core iron does not need to overcome the pressure difference force of the valve core at the moment until the moving core iron drives the valve core to synchronously move, the pressure difference force of the valve core needs to be overcome. Specifically, when the valve is opened, the movable core iron moves towards the direction close to the static core iron under the action of electromagnetic force, and after the movable core iron moves to the matching position, the movable core iron drives the valve core to synchronously move towards the direction close to the static core iron until the movable core iron moves to the adsorption position, and the valve core completely opens the valve port. Because the electromagnetic force between the moving core iron and the static core iron and the distance between the moving core iron and the static core iron are in an exponentially changing relation, the smaller the distance between the moving core iron and the static core iron is, the larger the magnetic force between the moving core iron and the static core iron is. Therefore, the magnetic force of the moving core iron at the mating position is greater than the magnetic force of the moving core iron at the initial position. In the traditional technical scheme, the valve core always moves synchronously with the movable core iron, so when the valve is opened, the movable core iron needs to overcome the pressure difference force of the valve core at the initial position, but the electromagnetic force between the movable core iron and the static core iron is smaller at the initial position, and the valve opening difficulty in the traditional technical scheme is larger. Compared with the traditional technical scheme, the electromagnetic force for driving the valve core to move at the moment can be increased through the arrangement of the scheme, and the smoothness of valve opening is improved.

Further, the distance from the initial position to the matching position is H1, and the distance from the initial position to the adsorption position is H, wherein H is more than or equal to 2% H and less than or equal to 20% H. By the arrangement, the smoothness of synchronous movement of the valve core driven by the movable core iron can be further ensured, and the smoothness of valve opening can be further ensured.

Further, the valve core is provided with a penetrating hole, the second end of the movable core iron is movably penetrated in the penetrating hole, a limiting structure is arranged between the valve core and the movable core iron, and the limiting structure is used for limiting the relative displacement between the movable core iron and the valve core. The setting of limit structure, it can make move the core iron and drive the case synchronous motion when moving to the cooperation position.

Further, the hole of wearing is including wearing to establish hole and second of wearing that the direction ladder of quiet core iron to the valve port set up wears to establish the hole, and the diameter of hole is worn to establish to the second is greater than the diameter of first hole of wearing, wears to establish to form the ladder face between hole and the second, moves the second end of core iron and has spacing portion, spacing portion and the spacing cooperation of ladder face, when moving core iron and being in initial position, has the interval between spacing portion and the ladder face, when moving core iron and being in the cooperation position, spacing portion and ladder face butt, moves core iron and cooperates in order to drive the case and remove through spacing portion and ladder face. The device has simple structure and is convenient for processing and forming the movable core iron and the valve core.

Further, a balance channel is arranged on the moving core iron, one end of the balance channel penetrates through the end face of the first end, and the other end of the balance channel penetrates through the end face of the second end and is communicated with the penetrating hole. The arrangement of the balance channel can enable the inside of the accommodating cavity to realize internal balance rapidly, and ensure the smoothness of valve opening and valve closing.

Further, a balance hole is formed in the side wall of the movable core iron, the balance hole is close to the first end of the movable core iron, and the balance hole is communicated with the balance channel. By the arrangement, the speed of internal balance inside the accommodating cavity can be further improved, and the smoothness of valve opening and valve closing is further improved.

Further, the solenoid valve further includes: the buffer piece is arranged between the second end of the movable core iron and the valve core, one end of the buffer piece is connected with the valve core, and the other end of the buffer piece is connected with the second end of the movable core iron. The buffer piece is arranged, so that the buffer effect can be achieved when the movable core iron is contacted with the valve core, the rigid contact between the movable core iron and the valve core is changed into flexible contact, and the structural strength of the valve core and the movable core iron is ensured.

Further, the valve core comprises a first section, a second section and a third section which are sequentially connected from the valve port to the static core iron, wherein the outer diameter of the first section and the outer diameter of the third section are both larger than the outer diameter of the second section, a flow hole is further formed in the valve body and communicated with the accommodating cavity, and when the valve core is positioned at a position for closing the valve port, the flow hole is opposite to the second section. By the arrangement, the impact force of fluid on the valve core can be reduced, and the service life of the valve core can be further ensured.

Further, the electromagnetic valve further comprises a first sealing element and a second sealing element, wherein the first sealing element is sleeved on the periphery of the first section and is in sealing connection with the inner wall of the valve body, and the second sealing element is sleeved on the periphery of the third section and is in sealing connection with the inner wall of the valve body. The arrangement of the first sealing element and the second sealing element can ensure the sealing effect on the accommodating cavity, and further can ensure the stability of the closed valve.

Further, the moving core iron comprises a magnetic force part and a matching part which are mutually connected along the direction from the static core iron to the valve port, the sectional area of the matching part is smaller than that of the magnetic force part, the matching part is in sliding fit with the valve core, the valve core comprises a protruding part and a body part which are mutually connected along the direction from the static core iron to the valve port, the sectional area of the protruding part is smaller than that of the body part, and the sectional area of the protruding part is smaller than that of the magnetic force part. So set up, can reduce the adsorption affinity between bulge and the magnetic force portion, promote the smoothness of valve opening process.

Further, the electromagnetic valve further comprises a reset piece, the reset piece is arranged between the static core iron and the movable core iron, and the reset piece is used for driving the movable core iron to return to the initial position from the adsorption position.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 shows a cross-sectional view of a moving core iron of a solenoid valve according to an embodiment of the present application in an initial position;

fig. 2 shows a schematic position structure of a moving core iron of a solenoid valve according to an embodiment of the present application in a mating position;

fig. 3 is a schematic structural view of a magnetic part of a moving core iron and a valve core of a solenoid valve according to an embodiment of the present application when the magnetic part and the valve core are attached to each other.

Wherein the above figures include the following reference numerals:

10. a valve body; 101. a receiving chamber; 102. a valve port; 103. a flow hole; 11. a valve seat; 111. a first chamber; 12. a sleeve; 121. a second chamber; 13. a coil;

20. static core iron;

30. a moving core iron;

301. a limit part; 302. balance channel; 303. a balance hole;

31. a magnetic part; 32. a mating portion;

40. a valve core; 401. a first through hole; 402. a second through hole; 403. a first seal; 404. a second seal; 41. a first section; 42. a second section; 43. a third section; 44. a protruding portion;

50. a buffer member;

60. and a reset piece.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

As shown in fig. 1 to 3, the present application provides a solenoid valve including a valve body 10, a stationary core iron 20, a moving core iron 30, and a valve core 40. Wherein the valve body 10 has a receiving chamber 101 and a valve port 102, the valve port 102 being provided at one end of the valve body 10 and communicating with the receiving chamber 101. The stationary core iron 20 is disposed in the accommodation chamber 101 and opposite to the valve port 102. The moving core iron 30 is movably disposed in the accommodating cavity 101, and the moving core iron 30 has a first end and a second end disposed opposite to each other, the first end magnetically cooperates with the stationary core iron 20, and the second end is disposed toward the valve port 102. The valve core 40 is located in the accommodating cavity 101, and the valve core 40 is movably disposed at the second end of the moving core iron 30, the valve core 40 is used for opening or closing the valve port 102, and when the moving core iron 30 moves towards the static core iron 20, the valve core 40 has a static state and a moving state in which the moving core iron 30 moves synchronously. The moving core iron 30 has an initial position, a matching position and an adsorption position, which are set along the direction from the valve port 102 to the static core iron 20, when the moving core iron 30 is at the initial position, the valve core 40 is at a static state, and when the moving core iron 30 moves to the matching position, the valve core 40 and the moving core iron 30 move synchronously until the moving core iron 30 moves to the adsorption position.

When the technical scheme of the application is applied, during the valve opening process, the valve core 40 is kept still in the process that the movable core iron 30 moves from the initial position to the matched position, and the movable core iron 30 does not need to overcome the pressure difference force born by the valve core 40 at this time until the movable core iron 30 drives the valve core 40 to synchronously move, the pressure difference force of the valve core 40 needs to be overcome. Specifically, when the valve is opened, the moving core iron 30 moves towards the direction close to the static core iron 20 under the action of electromagnetic force, and after the moving core iron 30 moves to the matching position, the moving core iron 30 drives the valve core 40 to synchronously move towards the direction close to the static core iron 20 until the moving core iron 30 moves to the adsorption position, and the valve core 40 completely opens the valve port 102. Because the electromagnetic force between the moving core iron 30 and the stationary core iron 20 has an exponentially varying relationship with the distance therebetween, the smaller the distance between the moving core iron 30 and the stationary core iron 20 is, the greater the magnetic force therebetween. Therefore, the magnetic force of the moving core iron 30 at the fitting position is greater than the magnetic force of the moving core iron 30 at the initial position. In the conventional technical scheme, the valve core 40 always moves synchronously with the moving core iron 30, so when the valve is opened, the moving core iron 30 needs to overcome the pressure difference force of the valve core 40 at the initial position, but the electromagnetic force between the moving core iron 30 and the static core iron 20 is smaller at the initial position, so the valve opening difficulty in the conventional technical scheme is larger. Compared with the traditional technical scheme, the electromagnetic force for driving the valve core 40 to move can be increased by the arrangement of the scheme, and the smoothness of valve opening is improved. In addition, the valve core 40 directly controls the opening and closing of the valve port 102, so that the valve has a simple structure.

As shown in FIGS. 1 and 2, the interval from the initial position to the mating position is H1, and the interval from the initial position to the adsorption position is H, wherein H is 2% H-H1 is 20% H. There is a machining error when machining the moving core iron 30 and the valve core 40, and there is an assembly error when assembling the moving core iron 30 and the valve core 40, when H-H1 is less than or equal to 2% H, there may be a case where H1 is greater than H in an actual working condition, and further a case where the valve cannot be opened may occur. When H-H1 is more than or equal to 20% H, after the moving core iron 30 moves to the matching position, the gap between the moving core iron 30 and the static core iron 20 is too large, and the valve opening effect may be affected. Therefore, the application sets H-H1 in the above range, and can further improve the smoothness of the valve opening process. Optionally, H-h1=2%h, H-h1= 5%H, H-h1= 6%H, H-h1= 8%H, H-h1=10%h, H-h1=15%h or H-h1=20%h, in this case, H-h1= 5%H.

As shown in fig. 1 and 3, the valve core 40 has a through hole, the second end of the moving core iron 30 is movably inserted in the through hole, a limiting structure is disposed between the valve core 40 and the moving core iron 30, and the limiting structure is used for limiting the relative displacement between the moving core iron 30 and the valve core 40. Specifically, when the valve is opened, under the action of electromagnetic force, the moving core iron 30 moves in a direction approaching to the static core iron 20 until the moving core iron 30 moves to the matching position, and at this time, the limiting structure acts between the moving core iron 30 and the valve core 40, so that the valve core 40 moves synchronously with the moving core iron 30. The device has simple structure. And the second end of the movable core iron 30 is arranged in the through hole in a penetrating way, when the valve core 40 is in a state of closing the valve port, the overall height of the movable core iron 30 and the valve core 40 can be reduced as much as possible, and the compactness of the electromagnetic valve can be further ensured, so that the electromagnetic valve is miniaturized.

As shown in fig. 2 and 3, the through hole includes a first through hole 401 and a second through hole 402 that are arranged along the direction from the stationary core iron 20 to the valve port 102 in a stepped manner, the diameter of the second through hole 402 is larger than that of the first through hole 401, a stepped surface is formed between the first through hole 401 and the second through hole 402, the second end of the movable core iron 30 is provided with a limiting portion 301, the limiting portion 301 is in limiting fit with the stepped surface, when the movable core iron 30 is in an initial position, a space is reserved between the limiting portion 301 and the stepped surface, when the movable core iron 30 is in a matched position, the limiting portion 301 is in abutting contact with the stepped surface, and the movable core iron 30 is matched with the stepped surface through the limiting portion 301 to drive the valve core 40 to move. In this embodiment, the limiting portion 301 and the step surface form a limiting structure. Specifically, when the valve is opened, the moving core iron 30 moves in a direction approaching the static core iron 20, the valve core 40 is in a static state in the process of moving the moving core iron 30 from the initial position to the matching position, when the moving core iron 30 moves to the matching position, the limiting part 301 is abutted against the stepped surface, the moving core iron 30 continues to move in a direction approaching the static core iron 20, and the electromagnetic force applied to the moving core iron 30 is sufficient to overcome the gravity of the moving core iron 30, the gravity of the valve core 40 and the pressure difference force applied to the valve core 40, and at this time, the moving core iron 30 drives the valve core 40 to move in a direction approaching the static core iron 20 until the moving core iron 30 moves to the adsorption position. Specifically, the distance between the end face of the limit portion 301 near the end of the stepped surface and the stepped surface is equal to the distance between the initial position of the moving core iron 30 and the mating position. So set up, can reflect the interval between initial position to the cooperation position through the terminal surface of the one end that is close to the step face of spacing portion 301 and the interval between the step face, when the interval between the initial position to the cooperation position need be adjusted, through the terminal surface of the one end that is close to the step face of adjustment spacing portion 301 with the interval between the step face can, and then can guarantee the adaptability of scheme.

As shown in fig. 3, a balance channel 302 is disposed on the moving core iron 30, one end of the balance channel 302 penetrates through the end face of the first end, and the other end of the balance channel 302 penetrates through the end face of the second end and is communicated with the through hole. The balance channel 302 is arranged, so that the inner balance between the accommodating cavity 101 and the mounting hole can be realized quickly, the resistance applied to the valve core 40 in the moving process is reduced, and the smoothness of the valve core 40 in the moving process is improved. In the present embodiment, the extending direction of the balance channel 302 is the same as the extending direction of the moving core iron 30. Thus, the air pressure balancing effect of the balancing channel 302 can be ensured.

Further, a balance hole 303 is provided on a side wall of the moving core iron 30, the balance hole 303 is provided near the first end of the moving core iron 30, and the balance hole 303 is communicated with the balance channel 302. The balance hole 303 can further balance air pressure, so that the air pressure balance effect in the accommodating cavity and the mounting hole can be further improved, and the smoothness of movement of the valve core 40 is ensured. In this embodiment, the number of balance holes 303 is not limited, and in this embodiment, one balance hole 303 is provided, and the extending direction of the balance hole 303 is perpendicular to the extending direction of the moving core iron 30.

As shown in fig. 1 and 3, the solenoid valve further includes a damper 50. The buffer member 50 is disposed between the second end of the moving core iron 30 and the valve core 40, one end of the buffer member 50 is connected to the valve core 40, and the other end of the buffer member 50 is connected to the second end of the moving core iron 30. In this embodiment, the buffer member 50 is a buffer spring, the buffer spring is sleeved at the second end of the moving core iron 30, one end of the buffer spring is connected with the moving core iron 30, and the other end of the buffer spring is connected with the step surface. The buffer spring can play a role in buffering when the limiting part 301 is contacted with the step surface, so that the acting force of the limiting part 301 on the valve core 40 in the moment that the limiting part 301 is contacted with the step surface is reduced, the stability of the moving process of the valve core 40 driven by the moving core iron 30 is ensured, meanwhile, the situation that the end face of one end of the limiting part 301, which is close to the step surface, and the step surface are deformed due to overlarge impact force can be reduced, and the distance between the initial position and the matching position is ensured to be consistent with the distance between the initial position and the matching position when leaving a factory as much as possible after long-time use, and the smoothness of valve opening is ensured.

As shown in fig. 3, the valve core 40 includes a first section 41, a second section 42 and a third section 43 sequentially connected from the valve port 102 to the static core iron 20, wherein the outer diameter of the first section 41 and the outer diameter of the third section 43 are larger than the outer diameter of the second section 42, a flow hole 103 is further provided on the valve body 10, the flow hole 103 is communicated with the accommodating cavity 101, and when the valve core 40 is at a position closing the valve port 102, the flow hole 103 is opposite to the second section 42. By the arrangement, the weight of the whole valve core 40 can be reduced, so that the gravity of the valve core 40 which needs to be overcome when the valve core 40 is driven to move by the movable core iron 30 can be reduced, and the smoothness of valve opening is further improved. And, when the valve spool 40 is in a position to close the valve port 102, the flow hole 103 is provided opposite to the second segment 42. Because the outer diameter of the second section 42 is smaller than the outer diameter of the third section 43 and the outer diameter of the second section 42 is also smaller than the outer diameter of the first section 41, the contact area between the valve core 40 and the fluid can be reduced, the impact force of the fluid on the valve core 40 can be reduced, and the stability of the valve core 40 is ensured. In addition, by providing this structure, the space between the valve body 40 and the inner wall of the valve body 10 can be increased, and the flow rate of the fluid can be ensured, so that the smoothness of the fluid flow can be improved. Moreover, the first section 41 and the third section 43 are in clearance fit with the accommodating cavity 101, and the interval between the second section 42 and the inner wall of the valve body 10 is large, so that the friction between the second section 42 and the inner wall of the valve body 10 is not required to be overcome in the valve opening and closing process, and the smoothness of the valve opening and closing process is improved.

As shown in fig. 1, the solenoid valve further includes a first sealing member 403 and a second sealing member 404, where the first sealing member is sleeved on the outer periphery of the first section 41 and is connected with the inner wall of the valve body 10 in a sealing manner, and the second sealing member 404 is sleeved on the outer periphery of the third section 43 and is connected with the inner wall of the valve body 10 in a sealing manner. Specifically, the valve body 10 includes a valve seat 11 and a sleeve 12, and the solenoid valve further includes a coil 13. Wherein the valve seat 11 has a first chamber 111, and the valve port 102 is provided at one end of the valve seat 11 and communicates with the first chamber 111. The sleeve 12 has a second chamber 121, one end of the sleeve 12 is inserted through the valve seat 11, and the sleeve 12 is disposed opposite to the valve port 102, and the second chamber 121 communicates with the first chamber 111 and forms a receiving chamber. The second chamber 121 is arranged coaxially with the first chamber 111, and the cross section of the second chamber 121 is smaller than the cross section of the first chamber 111. The static core iron 20 is disposed at an end of the sleeve 12 remote from the valve port 102. The coil 13 is sleeved on the periphery of the sleeve 12 and is magnetically matched with the static core iron 20. The valve core 40 is movably disposed in the first chamber 111, and when the moving core iron 30 is in the initial position, the second end of the moving core iron 30 is located in the first chamber 111 and is in abutting engagement with the valve core 40. The arrangement of the first seal 403 and the second seal 404 can increase the sealing effect of the first chamber 111, and further can ensure the stability of the valve closing. Specifically, a first mounting groove is provided on the circumferential surface of the first segment 41 in an annular shape, and the first seal 403 is embedded in the first mounting groove. A second mounting groove is provided on the peripheral surface of the third section 43 in an annular shape, and a second seal 404 is fitted in the second mounting groove. So set up, can guarantee the convenience of first sealing member and second sealing member installation to can guarantee the stability of first sealing member 403 and second sealing member 404 installation, and then can guarantee the stability of valve opening and valve closing process.

As shown in fig. 3, the moving core iron 30 includes a magnetic force portion 31 and a fitting portion 32 connected to each other in a direction from the stationary core iron 20 to the valve port 102, a sectional area of the fitting portion 32 is smaller than that of the magnetic force portion 31, the fitting portion 32 is slidably fitted with the valve core 40, the valve core 40 includes a protruding portion 44 and a body portion connected to each other in a direction from the stationary core iron 20 to the valve port 102, a sectional area of the protruding portion 44 is smaller than that of the body portion, and a sectional area of the protruding portion 44 is smaller than that of the magnetic force portion 31. Specifically, the first section 41, the second section 42, and the third section 43 form a body portion. When the moving core iron 30 is at the initial position, one end of the magnetic part 31, which is far away from the connection of the matching part 32, is penetrated in the second chamber 121, and the other end of the magnetic part 31 is penetrated in the first chamber 111 and is in abutting fit with the protruding part 44 of the valve core 40. In actual use, lubricating oil is arranged between the protruding part 44 and the magnetic part 31, and under the action of the lubricating oil, a certain adsorption force is arranged between the protruding part 44 and the magnetic part 31, so that the contact area between the protruding part 44 and the magnetic part 31 can be reduced, the adsorption force between the protruding part 44 and the magnetic part can be reduced, and the smoothness of the valve opening process is further improved. In addition, the protruding portion 44 can guide and limit the movement of the mating portion 32, so that the stability of the movement of the mating portion 32 is ensured, and further, the stability of the valve opening and closing processes can be ensured.

Further, the fitting portion 32 includes fourth, fifth, sixth, and seventh segments arranged stepwise in the axial direction, and the diameters of the fourth, fifth, sixth, and seventh segments gradually increase. Wherein, the end face of the magnetic force portion 31 near one end of the valve core 40 is provided with an assembly hole, one end of the fourth section far away from the fifth section is penetrated in the assembly hole and is in interference fit with the assembly hole, the sixth section forms a limiting portion, one end of the buffer spring is sleeved on the periphery of the sixth section and is abutted with the seventh section, and the other end of the buffer spring is abutted with the inner peripheral surface of the valve core 40. So set up, can guarantee the convenience to buffer spring assembly to, can reduce the weight of cooperation portion 32 as far as possible, reduce the gravity of cooperation portion 32 that the valve in-process needs to overcome, promote the smoothness of valve opening process.

As shown in fig. 1, the electromagnetic valve further includes a reset element 60, the reset element 60 is disposed between the stationary core iron 20 and the moving core iron 30, and the reset element 60 is used for driving the moving core iron 30 to return from the adsorption position to the initial position. Further, the balance channel 302 includes a first channel, a second channel, a third channel, and a fourth channel that communicate in order in the direction from the magnetic force portion 31 to the mating portion. The first channel, the second channel and the third channel are all disposed on the magnetic portion 31, and the fourth channel is disposed on the mating portion 32. Wherein, the diameter of the first passageway is greater than the diameter of the second passageway, and the mounting hole forms the third passageway, and the diameter of third passageway is greater than the diameter of second passageway. The diameter of the fourth channel is the same as the diameter of the second channel and the fourth channel is disposed through the mating portion 32. By this arrangement, the compactness of the entire structure of the moving core iron 30 can be ensured. The reset piece 60 is a reset spring, one end of the reset spring is arranged in the first channel, and the other end of the reset spring protrudes out of the first channel and is in abutting fit with the static core iron 20. The setting of reset spring, its simple structure is convenient for assemble with magnetic force portion 31 to, set up reset spring's one end in first passageway, can guarantee reset spring's stability.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present application, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present application; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present application.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A solenoid valve, comprising:

a valve body (10) having a housing chamber (101) and a valve port (102), the valve port (102) being provided at one end of the valve body (10) and communicating with the housing chamber (101);

the static core iron (20) is arranged in the accommodating cavity (101) and is opposite to the valve port (102);

a moving core iron (30) movably arranged in the accommodating cavity (101), wherein the moving core iron (30) is provided with a first end and a second end which are oppositely arranged, the first end is magnetically matched with the static core iron (20), and the second end is arranged towards the valve port (102);

a valve core (40) located in the accommodating cavity (101), wherein the valve core (40) is movably arranged at the second end of the movable core iron (30), the valve core (40) is used for opening or closing the valve port (102), and the valve core (40) has a static state and a movement state synchronously moving along with the movable core iron (30) when the movable core iron (30) moves towards the static core iron (20);

the valve core (30) is provided with an initial position, a matching position and an adsorption position which are arranged along the direction from the valve port (102) to the static core iron (20), when the valve core (30) is positioned at the initial position, the valve core (40) is positioned at the static state, and when the valve core (40) moves to the matching position, the valve core (40) and the valve core (30) synchronously move until the valve core (30) moves to the adsorption position.

2. The solenoid valve of claim 1 wherein the spacing between the initial position and the engaged position is H1 and the spacing between the initial position and the adsorption position is H2% H-H1% H.

3. The solenoid valve according to claim 1, wherein the spool (40) has a through hole, the second end of the moving core iron (30) is movably inserted in the through hole, a limiting structure is provided between the spool (40) and the moving core iron (30), and the limiting structure is used for limiting the relative displacement between the moving core iron (30) and the spool (40).

4. The electromagnetic valve according to claim 3, characterized in that the penetrating holes comprise a first penetrating hole (401) and a second penetrating hole (402) which are arranged in a step manner along the direction from the static core iron (20) to the valve port (102), the diameter of the second penetrating hole (402) is larger than that of the first penetrating hole (401), a step surface is formed between the first penetrating hole (401) and the second penetrating hole (402), the second end of the moving core iron (30) is provided with a limiting part (301), the limiting part (301) is in limit fit with the step surface, when the moving core iron (30) is in the initial position, a space is reserved between the limiting part (301) and the step surface, and when the moving core iron (30) is in the fit position, the limiting part (301) is in abutment with the step surface, and the moving core iron (30) is driven to move by the matching of the limiting part (301) with the step surface to drive the valve core (40).

5. A solenoid valve according to claim 3, characterised in that said moving core iron (30) is provided with a balancing channel (302), one end of said balancing channel (302) being provided through the end face of said first end, the other end of said balancing channel (302) being provided through the end face of said second end and being in communication with said through hole.

6. The electromagnetic valve according to claim 5, characterized in that a balancing hole (303) is provided on a side wall of the moving core iron (30), the balancing hole (303) is provided near a first end of the moving core iron (30), and the balancing hole (303) is communicated with the balancing channel (302).

7. The solenoid valve of claim 1, further comprising:

the buffer piece (50) is arranged between the second end of the movable core iron (30) and the valve core (40), one end of the buffer piece (50) is connected with the valve core (40), and the other end of the buffer piece (50) is connected with the second end of the movable core iron (30).

8. The electromagnetic valve according to claim 1, characterized in that the valve body (40) comprises a first section (41), a second section (42) and a third section (43) which are sequentially connected from the valve port (102) to the stationary core iron (20), wherein the outer diameter of the first section (41) and the outer diameter of the third section (43) are larger than the outer diameter of the second section (42), a communication hole (103) is further formed in the valve body (10), the communication hole (103) is communicated with the accommodating cavity (101), and when the valve body (40) is in a position for closing the valve port (102), the communication hole (103) is arranged opposite to the second section (42).

9. The electromagnetic valve according to claim 8, further comprising a first sealing member (403) and a second sealing member (404), wherein the first sealing member (403) is sleeved on the outer periphery of the first section (41) and is in sealing connection with the inner wall of the valve body (10), and the second sealing member (404) is sleeved on the outer periphery of the third section (43) and is in sealing connection with the inner wall of the valve body (10).

10. A solenoid valve according to claim 3 wherein said moving core iron (30) includes a magnetic portion (31) and a mating portion (32) connected to each other in a direction from said stationary core iron (20) to said valve port (102), a cross-sectional area of said mating portion (32) is smaller than a cross-sectional area of said magnetic portion (31), said mating portion (32) is slidably mated with said spool (40), said spool (40) includes a protruding portion (44) and a body portion connected to each other in a direction from said stationary core iron (20) to said valve port (102), a cross-sectional area of said protruding portion (44) is smaller than a cross-sectional area of said body portion, and a cross-sectional area of said protruding portion (44) is smaller than a cross-sectional area of said magnetic portion (31).

11. The solenoid valve according to claim 1, further comprising a return member (60), said return member (60) being disposed between said stationary core iron (20) and said moving core iron (30), said return member (60) being configured to drive said moving core iron (30) from said adsorption position back to said initial position.