CN217328485U

CN217328485U - Solenoid valve, refrigeration plant and car

Info

Publication number: CN217328485U
Application number: CN202221091290.1U
Authority: CN
Inventors: 刘振超
Original assignee: Guangdong Welling Motor Manufacturing Co Ltd
Current assignee: Guangdong Welling Motor Manufacturing Co Ltd
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-08-30
Anticipated expiration: 2032-05-06

Abstract

The utility model relates to a solenoid valve technical field specifically discloses a solenoid valve, refrigeration plant and car, wherein, this solenoid valve includes valve seat subassembly, piston assembly, sleeve pipe, quiet core iron, butt piece, first elastic component, moves core iron and second elastic component. The first elastic piece is positioned between the static core iron and the abutting piece, and the static core iron is abutted with the piston assembly through the first elastic piece and the abutting piece; the second elastic piece is positioned between the movable core iron and the static core iron and sleeved on the outer peripheral side of the first elastic piece, and the second elastic piece provides elastic resistance for the movable core iron in the direction moving towards the static core iron; wherein the stiffness coefficient of the second elastic member is smaller than the stiffness coefficient of the first elastic member. The utility model discloses the solenoid valve can improve solenoid valve switch valve's action performance effectively, improves the reliability of its action simultaneously.

Description

Solenoid valve, refrigeration plant and car

Technical Field

The utility model relates to a solenoid valve technical field, in particular to solenoid valve, refrigeration plant and car.

Background

As automobiles become more widely used, it has become a basic configuration of automobiles to have a temperature adjusting function to achieve a more comfortable driving environment. Among them, in the refrigeration system, often set up the solenoid valve, in order to control the make-and-break of the medium in the pipe-line system.

In order to enhance the action performance of the existing solenoid valve, the initial electromagnetic force is improved by reducing the elastic force value of a spring in a moving core assembly of the existing solenoid valve. In this case, when the solenoid valve jumps from open to close, the moving core cannot overcome residual magnetism between magnetic materials or reaction force of the elastic member of the piston due to the decrease in the elastic force value of the spring, so that the solenoid valve cannot be normally closed.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solenoid valve, refrigeration plant and car, the residual magnetism or the reaction force of piston elastic component between the magnetic material can't be overcome to the moving core iron that aims at solving current solenoid valve to lead to the unable technical problem who normally closes of solenoid valve.

In order to achieve the above object, the present invention provides a solenoid valve comprising:

the valve seat assembly is provided with a valve cavity and a valve port communicated with the valve cavity;

the piston assembly is arranged in the valve cavity and is used for opening and sealing the valve port;

a sleeve secured to the valve seat;

the static core iron is fixed in the sleeve;

the abutting part is positioned in the sleeve and is positioned between the static core iron and the piston assembly;

the first elastic piece is positioned between the static core iron and the abutting piece, and the static core iron is abutted with the piston assembly through the first elastic piece and the abutting piece;

the movable core iron is movably arranged in the sleeve along the axial direction of the sleeve, and is positioned between the static core iron and the piston assembly;

the second elastic piece is positioned between the movable core iron and the static core iron and sleeved on the outer peripheral side of the first elastic piece, and the second elastic piece provides elastic resistance for the movable core iron in the direction moving towards the static core iron;

wherein the stiffness coefficient of the second elastic member is smaller than the stiffness coefficient of the first elastic member.

In an embodiment, the first elastic member and the second elastic member are both compression springs.

In an embodiment, a through hole extending in the axial direction of the sleeve is formed in the movable core iron, and the first elastic member, the abutting member and the second elastic member are all arranged in the through hole.

In one embodiment, a boss is formed on the inner wall of the through hole, the boss has a first step surface facing the valve seat assembly and a second step surface facing the static core iron, the abutting member includes a cylinder and a lug arranged on the periphery of the cylinder, the lug abuts against the first step surface, and one end, away from the static core iron, of the second elastic member abuts against the second step surface.

In an embodiment, the moving core iron comprises a core column and a washer, the through hole is formed in the core column, the washer is embedded into one end, away from the static core iron, of the core column, and the washer is used for limiting one end, facing the valve seat assembly, of the abutting part.

In an embodiment, the piston assembly has a protruding portion protruding toward the moving core iron, the protruding portion is provided with a pilot valve port, the pilot valve port is communicated with the valve cavity, and the abutting member abuts against the piston assembly and seals the pilot valve port.

In one embodiment, a fit clearance is arranged between the piston assembly and the movable core iron.

In one embodiment, the stiffness coefficient of the first elastic member is 3 to 5 times that of the second elastic member.

In an embodiment, the through-hole includes first aperture portion, second aperture portion and third aperture portion, first aperture portion the second aperture portion with the third aperture portion orientation deviates from the direction of quiet core iron increases the setting in proper order, the packing ring is fixed to be located the third aperture portion.

In an embodiment, the through hole further includes a fourth aperture portion, the fourth aperture portion is disposed at an end of the movable core close to the stationary core, the first elastic member is disposed at the first aperture portion, the second elastic member is disposed at the fourth aperture portion, the abutting member is disposed at the second aperture portion, and an end of the abutting member penetrates through the gasket and abuts against the piston assembly.

In an embodiment, the solenoid valve further includes a third elastic member, the third elastic member is sleeved outside the valve port, and one end of the third elastic member abuts against the piston assembly, and the other end of the third elastic member abuts against the valve seat assembly.

In one embodiment, the valve seat assembly further comprises a media inlet and a media outlet, the media inlet being communicable with the media outlet through the valve port.

The utility model also provides a refrigeration plant, refrigeration plant includes as above the solenoid valve, the solenoid valve includes valve seat subassembly, piston assembly, sleeve pipe, quiet core iron, butt piece, first elastic component, moves core iron and second elastic component. The valve seat assembly is provided with a valve cavity and a valve port communicated with the valve cavity; the piston assembly is arranged in the valve cavity and is used for opening and sealing the valve port; the sleeve is fixed on the valve seat assembly; the static core iron is fixed in the sleeve; the abutting part is positioned in the sleeve and is positioned between the static core iron and the piston assembly; the first elastic piece is positioned between the static core iron and the abutting piece, and the static core iron is abutted with the piston assembly through the first elastic piece and the abutting piece; the movable core iron is movably arranged in the sleeve along the axial direction of the sleeve, and the movable core iron is positioned between the static core iron and the piston assembly; the second elastic piece is positioned between the movable core iron and the static core iron and sleeved on the outer peripheral side of the first elastic piece, and the second elastic piece provides elastic resistance for the movable core iron in the direction moving towards the static core iron; wherein the stiffness coefficient of the second elastic member is smaller than the stiffness coefficient of the first elastic member.

The utility model discloses still provide an automobile, the automobile includes as above refrigeration plant.

The utility model discloses the solenoid valve includes valve seat subassembly, piston assembly, sleeve pipe, quiet core iron, butt spare, first elastic component, moves core iron and second elastic component. The valve seat assembly is provided with a valve cavity and a valve port communicated with the valve cavity; the piston assembly is arranged in the valve cavity and is used for opening and sealing the valve port; the sleeve is fixed on the valve seat assembly; the static core iron is fixed in the sleeve; the abutting part is positioned in the sleeve and is positioned between the static core iron and the piston assembly; the first elastic piece is positioned between the static core iron and the abutting piece, and the static core iron is abutted with the piston assembly through the first elastic piece and the abutting piece; the movable core iron is movably arranged in the sleeve along the axial direction of the sleeve, and the movable core iron is positioned between the static core iron and the piston assembly; the second elastic piece is positioned between the movable core iron and the static core iron and sleeved on the outer peripheral side of the first elastic piece, and the second elastic piece provides elastic resistance for the movable core iron in the direction moving towards the static core iron; wherein the stiffness coefficient of the second elastic member is smaller than the stiffness coefficient of the first elastic member. Therefore, when the electromagnetic valve is opened from closing to opening, and the movable core iron moves upwards in the initial action, only the second elastic part with smaller stiffness coefficient needs to be compressed for deformation, so that the problem that the elastic part with larger stiffness coefficient cannot be compressed for doing work due to larger distance between the static core iron and the movable core iron and lower electromagnetic force during the initial action of opening the valve port of the electromagnetic valve is solved, and the switching action is slower initially. Meanwhile, the first elastic element still keeps a larger stiffness coefficient so as to solve the problem that when the electromagnetic valve closes the valve port, the residual magnetic force or the reaction force of the piston elastic element after the static core iron and the movable core iron are electrified causes that the piston assembly cannot be quickly and effectively covered on the valve port to close the electromagnetic valve. Therefore, in the present application, the stiffness coefficient of the second elastic member is set smaller than the stiffness coefficient of the first elastic member, so that the operation performance of the initial operation when the solenoid valve is opened and the reliability when the solenoid valve is closed can be effectively improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of the electromagnetic valve of the present invention;

fig. 2 is a partially enlarged view of a point a in fig. 1.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a solenoid valve, refrigeration plant including this solenoid valve to and including this refrigeration plant's car. The electromagnetic valve is applied to a refrigerating system, the refrigerating system can be a refrigerating system of an air conditioner, a refrigerator, a freezer or other refrigerating and heating equipment, and the electromagnetic valve can control the flow of a refrigerating medium in the refrigerating system.

In the embodiment of the present invention, as shown in fig. 1 to 2, the solenoid valve 10 includes a valve seat assembly 11, a piston assembly 18, a sleeve 12, a stationary core iron 13, an abutting member 17, a first elastic member 15, a movable core iron 14, and a second elastic member 16. The valve seat assembly 11 is provided with a valve cavity 111 and a valve port 112 communicated with the valve cavity 111; the piston assembly 18 is arranged in the valve cavity 111 and is used for opening and closing the valve port 112; the sleeve 12 is fixed to the valve seat assembly 11; the static core iron 13 is fixed in the sleeve 12; the abutment 17 is located inside the sleeve 12 and between the static core iron 13 and the piston assembly 18; the first elastic piece 15 is positioned between the static core iron 13 and the abutting piece 17, and the static core iron 13 abuts against the piston assembly 18 through the first elastic piece 15 and the abutting piece 17; the movable core iron 14 is movably arranged in the sleeve 12 along the axial direction of the sleeve 12, and the movable core iron 14 is positioned between the static core iron 13 and the piston assembly 18; the second elastic member 16 is located between the moving core iron 14 and the static core iron 13 and is sleeved on the outer periphery side of the first elastic member 15, and the second elastic member 16 provides elastic resistance for the moving core iron 14 in the direction moving towards the static core iron 13; wherein the stiffness coefficient of the second elastic member 16 is smaller than the stiffness coefficient of the first elastic member 15.

Specifically, in the embodiment of the present invention, the solenoid valve 10 is illustrated by taking a pilot-operated normally closed solenoid valve as an example, and other forms of solenoid valves may be provided according to the embodiment of the present invention, which is not limited herein.

In the embodiment of the present invention, the electromagnetic valve 10 may include a valve seat assembly 11, the valve seat assembly 11 includes a valve cavity 111 and a valve port 112 communicated with the valve cavity 111, the valve seat assembly 11 may further include a valve cover 113, the valve cover 113 covers the valve port 112 of the valve cavity 111, and is used for sealing the valve cavity 111 to form a relatively sealed cavity. A medium inlet 114 and a medium outlet 115 are respectively arranged on two oppositely arranged side walls of the valve seat assembly 11, the medium inlet 114 is used for medium inflow, and the medium outlet 115 is used for medium outflow. The media inlet 114 may communicate with the media outlet 115 through the valve port 112. So that the medium can pass through the medium inlet 114 into the valve chamber 111 and then flow through the valve port 112 communicating with the valve chamber 111 to the medium outlet 115, thereby forming a medium communication passage.

In the embodiment of the present invention, the electromagnetic valve 10 further includes a sleeve 12, a stationary core 13, a movable core 14, a first elastic member 15, a second elastic member 16, an abutting member 17, and a piston assembly 18, wherein the piston assembly 18 is disposed at the upper end of the valve port 112, and is movably disposed in the valve chamber 111 for opening or blocking the valve port 112, so that the medium flows from the medium inlet 114 to the medium outlet 115. The sleeve 12 is disposed on the valve seat assembly 11, but the sleeve 12 may also be connected to the valve cover 113 to fixedly connect the sleeve 12 above the valve seat assembly 11. The fixing connection may be a welding, bonding, or screwing method, and is not limited herein. Of course, in other embodiments, the sleeve 12 may also be directly fixedly connected to the valve seat assembly 11, and is not limited herein.

The sleeve 12 may be a hollow cylindrical member having an opening at one end and a closed end at the other end, or may be a hollow cylindrical member having both ends open, and is not particularly limited herein. The static core iron 13 is fixedly arranged at one end of the sleeve 12, which is far away from the valve seat assembly 11, and the movable core iron 14 is movably arranged in the sleeve 12 along the axial direction of the sleeve 12 and is positioned between the static core iron 13 and the piston assembly 18. The abutment 17 is located at an end of the sleeve 12 remote from the static core iron 13 and between the static core iron 13 and the piston assembly 18. In the embodiment of the present application, the movable core iron 14 can drive the abutting member 17 to move in a direction toward the stationary core iron 13, so that the piston assembly 18 can open or close the valve port 112.

The first elastic member 15 is provided between the stationary core iron 13 and the abutting member 17, and the stationary core iron 13 abuts against the piston assembly 18 through the first elastic member 15 and the abutting member 17. The second elastic member 16 is also located between the moving core iron 14 and the static core iron 13, and the second elastic member 16 provides elastic resistance to the moving core iron 14 in the direction moving towards the static core iron 13 to cooperate with the actions of the first elastic member 15 and the abutting member 17, so that the piston assembly 18 can open and close the valve port 112. The first elastic member 15 may be a compression spring or a tension spring, and is not particularly limited herein.

In the embodiment of the present invention, the solenoid valve 10 may further include a third elastic member 20, where the third elastic member 20 is disposed between the piston assembly 18 and the outer wall of the valve port 112, and is used for cooperating with the first elastic member 15, the second elastic member 16 and the abutting member 17, so that the piston assembly 18 opens or blocks the valve port 112. Of course, in other embodiments, the third elastic member 20 may not be provided, and the piston assembly 18 may be opened by the pressure of the medium on the piston assembly 18 when the valve is opened; when the valve is closed, the piston assembly 18 is completely pressed by the first elasticity 15 and the abutting member 17, so that the piston assembly 18 is blocked on the valve port 112. And is not particularly limited herein.

In order to improve the operation performance of the solenoid valve 10 in the related art, it is generally adopted to reduce the elastic force value of the elastic member disposed between the static core iron 13 and the dynamic core iron 14 to improve the operation performance of the solenoid valve 10, but the elastic force value of the overall elastic member is so small that when the solenoid valve 10 is closed, the residual magnetic force or the reverse acting force of the piston elastic member when the power is cut off between the static core iron 13 and the dynamic core iron 14 cannot be overcome quickly and effectively, so that the solenoid valve 10 cannot be closed quickly and effectively, and the reliability of the solenoid valve 10 is reduced.

The utility model discloses solenoid valve 10 is through inciting somebody to action the setting of the coefficient of stiffness of second elastic component 16 is less than the coefficient of stiffness of first elastic component 15. In this way, when the solenoid valve 10 is opened from the closing action, during the initial action of the moving core iron 14 moving upward, only the second elastic element 16 with a smaller stiffness needs to be compressed for deformation, so as to solve the problem that during the initial action of the solenoid valve 10 opening the valve port 112, because the distance between the static core iron 13 and the moving core iron 14 is larger, the electromagnetic force therebetween is lower, and the elastic element with a larger stiffness cannot be compressed for work, so that the switching action is slower initially. Meanwhile, since the first elastic element 15 still maintains a large stiffness coefficient in the present application, it is possible to solve the problem that when the valve port 112 of the solenoid valve 10 is closed, the residual magnetic force or the reaction force of the piston elastic element remaining after the static core iron 13 and the moving core iron 14 are energized makes the piston assembly 18 not be able to cover the valve port 112 quickly and effectively to close the solenoid valve 10. Therefore, in the present application, the stiffness coefficient of the second elastic member 16 is set smaller than that of the first elastic member 15, so that the operation performance of the initial operation when the solenoid valve 10 is opened and the reliability when the solenoid valve is closed can be effectively improved.

Referring to fig. 1 to 2, in an embodiment, the first elastic member 15 and the second elastic member 16 are compression springs. It is understood that, when the second elastic member 16 is a compression spring, the first elastic member 15 may be a compression spring or a tension spring, and is not limited thereto. The first elastic member 15 and the second elastic member 16 are both compression springs, and other embodiments may refer to the implementation. Alternatively, when the first elastic member 15 and the second elastic member 16 are compression springs, the second elastic member 16 is compressed between the static core iron 13 and the dynamic core iron 14, and the first spring 15 is compressed between the abutting member 17 and the static core iron 13 by the reverse acting force of the abutting member 17 abutting against the piston assembly 18; when the first elastic element 15 is a tension spring and the second elastic element 16 is a compression spring, the abutting element 17 can provide a pulling force towards the static core iron 13 through the first elastic element 15, so as to better overcome a differential pressure force at the valve port 112, so that the piston assembly 18 is easier to open, and the actuation performance of the solenoid valve 10 is improved.

Referring to fig. 1 and 2, in an embodiment, a through hole 142 is formed in the movable core iron 14 and extends in an axial direction of the sleeve 12, and the first elastic element 15, the abutting element 17, and the second elastic element 16 are all disposed in the through hole 142. In the present embodiment, the through hole 142 is opened along the axial direction of the sleeve 12, and penetrates through both end surfaces of the moving core 14 near the stationary core 13 and the piston assembly 18. Of course, in other embodiments, the through holes 142 may be opened along other directions. The second elastic member 16 and the first elastic member 15 are disposed at one end of the through hole 142 close to the static core iron 13, the abutting member 17 is disposed at one end of the through hole 142 close to the piston assembly 18, and the first elastic member 15, the second elastic member 16 and the abutting member 17 are disposed in the through hole 142 to cooperate with the moving core iron 14 to move in the direction close to and away from the static core iron 13, so as to drive the abutting member 17 to move to open or close the valve port 112.

Referring to fig. 1 to 2, in an embodiment, a boss 144 is formed on an inner wall of the through hole 142, the boss 144 has a first step surface 144a facing the valve seat assembly 11 and a second step surface 144b facing the static core iron 13, the abutting member 17 includes a cylinder 171 and a lug 171a provided on an outer periphery of the cylinder 171, the lug 171a abuts against the first step surface 144a, and an end of the second elastic member remote from the static core iron abuts against the second step surface. In the present application, the boss 144 is disposed in the through hole 142, the lug 171a is disposed outside the abutment member 17, so that the abutment member 17 can be better limited, the lug 171a abuts against the first step surface 144a to limit the abutment member 17 in the direction of the movable core iron 14 toward the stationary core iron 13, so that when the solenoid valve 01 is closed, the movable core iron 14 can limit the abutment member 17 by the first step surface 144a, so that the abutment member 17 abuts against the piston assembly 18 to achieve the purpose of closing the valve port 112. The boss 144 is provided with a second step surface 144b in a direction toward the static core iron 13, and the second elastic member 16 abuts against the movable core iron 14 through the second step surface 144b to provide resistance for the movable core iron 14 moving toward the static core iron 13 and provide elastic force for the abutting member 17 to move the piston assembly 18 to close the valve port 112. The reliability of the closing of the solenoid valve 10 is improved.

Referring to fig. 1 to 2, in an embodiment, the moving core iron 14 includes a stem 141 and a washer 143, the through hole 142 is disposed in the stem 141, the washer 143 is embedded in an end of the stem 141 away from the stationary core iron 13, and the washer 143 is used for limiting an end of the abutting member 17 facing the valve seat assembly 11. It can be understood that the movable core iron 14 includes a stem 141 extending along the axial direction of the sleeve 12, the through hole 142 is provided in the stem 141, and the gasket 143 is provided in this application for conveniently encapsulating the first elastic element 15 and the abutment 17 provided in the through hole 142 and limiting an end of the abutment 17 close to the piston assembly 18. The washer 143 is fixedly connected to an end of the moving core 14 close to the piston assembly 18, and the fixing connection may be interference connection, welding or bonding, and the like, which is not limited herein.

Referring to fig. 2, in an embodiment, the piston assembly 18 has a protrusion 181 protruding toward the moving core iron 14, the protrusion 181 is provided with a valve port 181a, the valve port 181a is communicated with the valve port 112, and the abutting member 17 abuts against the piston assembly 18 and seals the valve port 181 a. In the present embodiment, the solenoid valve 10 is a pilot-operated solenoid valve, and therefore, in order to balance the pressure difference between both sides of the piston assembly 18 when the valve is opened, so as to operate the piston assembly 18, the piston assembly 18 is provided with a valve port 181a, the valve port 181a is communicated with the valve port 112, and when the solenoid valve 10 is opened, the movable core 14 is operated first to drive the abutting member 17 to open the valve port 181a, so as to balance the pressure difference between both sides of the piston assembly 18, so that the piston assembly 18 moves toward the direction of the stationary core 13, thereby reducing the problem that the piston assembly 18 cannot operate due to the pressure difference. Meanwhile, in order to improve the sealing performance of the abutment member 17 against the valve guide port 181a, the boss 181 is protruded from the side of the piston assembly 18 facing the movable core 14, so that it is possible to prevent a decrease in the sealing effect against the valve guide port 181a due to insufficient pressure when the abutment member 17 abuts against the boss 181, and thus to prevent a decrease in the reliability of the solenoid valve 10.

Referring to fig. 2, in an embodiment, a fit clearance 21 is provided between the piston assembly 18 and the moving core iron 14. It can be understood that, in order to reduce interference between the moving core iron 14 and the piston assembly 18 due to process errors or assembly errors, when the moving core iron 14 acts on the piston assembly 18 to block the valve port 112, interference is generated. The present application provides a fit clearance 21 between the piston assembly 18 and the moving core iron 14. The contact area is reduced by the fitting clearance 21, and interference is prevented. The size of the fit clearance 21 may be adjusted according to the process precision and the assembly precision, and is not particularly limited herein.

Specifically, in one embodiment, the stiffness coefficient of the first elastic member 15 is 3 to 5 times that of the second elastic member 16. Alternatively, the stiffness coefficient of the first elastic member 15 may be 3 times, 4 times, 5 times, etc. of the stiffness coefficient of the second elastic member 16, which may be set according to the use environment and the requirement of the solenoid valve 10. It is understood that, when the ratio of the stiffness coefficient of the first elastic member 15 to the stiffness coefficient of the second elastic member 16 is larger, the second elastic member 16 is easier to deform relative to the first elastic member 15, which is beneficial to the action performance of the valve opening, but too large causes the second elastic member 16 to be easily deformed, which increases the dead stroke between the static core iron 13 and the moving core iron 14, thereby reducing the action performance of the solenoid valve 10. When the ratio of the stiffness coefficient of the first elastic member 15 to the stiffness coefficient of the second elastic member 16 is smaller, the second elastic member 16 is less likely to be deformed, which is not favorable for improving the operation performance of the initial operation of the solenoid valve 10 when the valve is opened.

Referring to fig. 2, in an embodiment, the through hole 142 includes a first hole portion 142a, a second hole portion 142b, and a third hole portion 142c, the first hole portion 142a, the second hole portion 142b, and the third hole portion 142c are sequentially enlarged toward a direction away from the stationary core 13, and the washer 143 is fixedly disposed on the third hole portion 142 c. It can be understood that, by arranging the first aperture portion 142a, the second aperture portion 142b and the third aperture portion 143c to cooperate with each other, when the movable core iron 14 acts on the static core iron 13, the abutting piece 17 of the first elastic piece 15 arranged in the through hole 142 can be in linkage fit, so that the abutting piece 17 can open and close the valve port 181a, and the piston assembly 18 can open and close the valve port 112. Wherein the first, second and

third hole parts

142a, 142b and 142c are sequentially enlarged from the end of the static core iron 13 toward the direction of the valve seat assembly 11 to facilitate the assembly of the gasket 143 and the abutment 17. The washer 143 is disposed on the third aperture portion 142c, and plays a role of packaging and limiting an end of the abutting member 17 close to the piston assembly 18. Of course, in other embodiments, the first hole portion 142a, the second hole portion 142b, and the third hole portion 142c may be sequentially decreased toward the static core iron 13, which is not limited in this application and may be set as needed.

Specifically, the contact piece 17 is movably provided in the second bore portion 142b, and the contact piece 17 has a free stroke in the second bore portion 142b, where the contact piece 17 moves a distance in the second bore portion 142b when the boss 171a abuts against the washer 143 when the movable core 14 moves toward the stationary core 13 at an initial stage of opening the solenoid valve 10. The provision of the free stroke can reduce the failure of the electromagnetic valve 10 to operate the abutment member 17 against the pressure difference removal force due to the small electromagnetic force at the initial stage of the valve opening operation, can reduce the distance between the movable core iron 13 and the stationary core iron 14 by the free stroke, and can reduce the resistance to be overcome by the movable core iron 14 at the initial stage of the operation by incorporating the second elastic member 16 having a small stiffness coefficient, thereby improving the operation performance of the electromagnetic valve 10.

Referring to fig. 2, in an embodiment, the through hole 142 further includes a fourth hole portion 142d, the fourth hole portion 142d is disposed at one end of the movable core 14 close to the stationary core 13, the first elastic element 15 is disposed at the first hole portion 142a, the second elastic element 16 is disposed at the second hole portion 142b, the abutting element 17 is disposed at the second hole portion 142b, and one end of the abutting element passes through the washer 143 and abuts against the piston assembly 18. It can be understood that the second elastic member 16 is disposed in the fourth hole portion 142d, and abuts between the static core iron 13 and the second step surface 144b, and the second elastic member 16 is disposed in a gap with an inner wall of the fourth hole portion 144b, so as to prevent the second elastic member 16 from being damaged or deformation of the inner wall due to friction. The first elastic member 15 is disposed on the first hole portion 142a, the first hole portion 142a plays a role in assembling and limiting the first elastic member 15, the first elastic member 15 is in clearance fit with the inner wall of the first hole portion 142a, so as to reduce friction between the first elastic member 15 and the inner wall of the first hole portion 142a, improve the service life of the first elastic member 15, and reduce the deformation capacity of the first elastic member 15 due to friction resistance generated by friction, thereby reducing the actuation performance of the solenoid valve 10. The abutting piece 17 abuts against the inside of the two-hole portion, and the second hole portion 142b also plays a role in assembling and limiting the abutting piece 17. The abutting piece 17 is in clearance fit with the inner wall of the second hole portion 142b, and the abutting piece 17 is in clearance fit with the second hole portion 142b in order to prevent the abutting piece 17 from forming a pressure difference in the second hole portion 142b when the abutting piece 17 is opened, so that the movement of the abutting piece 17 is prevented, and at the same time, the friction between the abutting piece 17 and the inner wall of the second hole portion 142b is reduced, the abutting piece 17 is worn, and the service life of the solenoid valve 10 is prolonged.

Referring to fig. 1, in an embodiment, the solenoid valve 10 further includes a third elastic member 20, the third elastic member 20 is disposed outside the valve port 112, and one end of the third elastic member 20 abuts against the piston assembly 18 and the other end abuts against the valve seat assembly 11. The third elastic element 20 provides an elastic force for the piston assembly 18 to open and close the valve port 112.

The utility model discloses still provide a refrigeration plant, this refrigeration plant includes solenoid valve 10, and this solenoid valve 10's concrete structure refers to above-mentioned embodiment, because this refrigeration plant has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The utility model discloses still provide a car, this car includes refrigeration plant, and this refrigeration plant's concrete structure refers to above-mentioned embodiment, because this car has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A solenoid valve, comprising:

the piston assembly is arranged in the valve cavity and is used for opening and blocking the valve port;

a sleeve secured to the valve seat assembly;

the static core iron is fixed in the sleeve;

an abutment member located within the sleeve and between the static core iron and the piston assembly;

2. The electromagnetic valve according to claim 1, wherein the first elastic member and the second elastic member are compression springs.

3. The solenoid valve according to claim 2, wherein a through hole extending in an axial direction of said sleeve is provided in said movable core iron, and said first elastic member, said abutting member and said second elastic member are provided in said through hole.

4. The electromagnetic valve according to claim 3, wherein the inner wall of the through hole is formed with a boss having a first step surface facing the valve seat assembly and a second step surface facing the stationary core iron, the abutting member includes a cylinder and a lug provided on an outer periphery of the cylinder, the lug abuts against the first step surface, and an end of the second elastic member remote from the stationary core iron abuts against the second step surface.

5. The solenoid valve according to claim 4, wherein said moving core iron comprises a stem and a washer, said through hole is disposed in said stem, said washer is embedded in an end of said stem away from said stationary core iron, said washer is used for limiting an end of said abutting member facing said valve seat assembly.

6. The solenoid valve according to claim 5, wherein said piston assembly has a convex portion protruding toward said movable core iron, said convex portion having a pilot valve opening, said pilot valve opening communicating with said valve chamber, said abutting member abutting against said piston assembly and sealing said pilot valve opening.

7. The solenoid valve as claimed in claim 6 wherein a mating clearance is provided between said piston assembly and said moving core.

8. The electromagnetic valve according to claim 3, wherein the stiffness coefficient of the first elastic member is 3 to 5 times that of the second elastic member.

9. The solenoid valve according to claim 5, wherein the through hole comprises a first hole portion, a second hole portion and a third hole portion, the first hole portion, the second hole portion and the third hole portion are sequentially arranged in an increasing manner in a direction away from the stationary core iron, and the gasket is fixedly arranged on the third hole portion.

10. The electromagnetic valve according to claim 9, wherein the through hole further includes a fourth hole portion, the fourth hole portion is disposed at an end of the movable core iron close to the stationary core iron, the first elastic member is disposed at the first hole portion, the second elastic member is disposed at the fourth hole portion, the abutting member is disposed at the second hole portion, and an end of the abutting member penetrates through the washer and abuts against the piston assembly.

11. The solenoid valve according to any one of claims 1 to 10, further comprising a third elastic member, wherein the third elastic member is sleeved outside the valve port, and one end of the third elastic member abuts against the piston assembly and the other end abuts against the valve seat assembly.

12. The solenoid valve according to claim 11, wherein said valve seat assembly further comprises a media inlet and a media outlet, said media inlet being communicable with said media outlet through said valve port.

13. Refrigeration appliance, characterized in that it comprises a solenoid valve according to any one of claims 1 to 12.

14. A motor vehicle, characterized in that it comprises a refrigerating device as claimed in claim 13.