CN212564640U - Electromagnetic valve - Google Patents

Abstract

An electromagnetic valve comprises an iron core assembly and an elastic element, wherein the iron core assembly comprises a static iron core and a movable iron core, and the elastic element is respectively abutted against the static iron core and the movable iron core along the axial direction of the iron core assembly; the elastic element comprises a first elastic part and a second elastic part, and the first elastic part and the second elastic part are a whole piece. The elastic element improves the overall elastic coefficient of the elastic element by arranging the first elastic part and the second elastic part, and is favorable for reducing the impact formed by collision of the movable iron core and the static iron core when the electromagnetic valve works.

Description

Electromagnetic valve

Technical Field

The utility model relates to a fluid control field, in particular to solenoid valve.

Background

In the field of fluid control, an electromagnetic valve is used as a control component for controlling the conduction of a flow path, the electromagnetic valve comprises a static iron core and a movable iron core, and when the electromagnetic valve is electrified, the movable iron core can move towards the static iron core under the action of electromagnetic force and finally collide with the static iron core to form impact.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a solenoid valve is favorable to reducing the collision impact that moves iron core and quiet iron core actuation in-process and produce.

An electromagnetic valve comprises an iron core assembly and an elastic element, wherein the iron core assembly comprises a static iron core and a movable iron core, and the elastic element is respectively abutted against the static iron core and the movable iron core along the axial direction of the iron core assembly; the elastic element comprises a first elastic part and a second elastic part, and the first elastic part and the second elastic part are a whole piece; the elastic element comprises a first abutting part, a second abutting part and a third abutting part, the first elastic part extends from the second abutting part to the first abutting part, the second elastic part extends from the second abutting part to the third abutting part, and one of the static iron core and the movable iron core abuts against the second abutting part;

when the movable iron core is located at the first position, the third abutting part is located between the first abutting part and the second abutting part, and the other of the static iron core and the movable iron core abuts against the first abutting part; when the movable iron core is located at the second position, the static iron core and the other of the movable iron core are abutted with the first abutting part and the third abutting part.

The electromagnetic valve comprises an elastic element, the elastic element comprises a first abutting part, a second abutting part and a third abutting part, when the electromagnetic valve is not electrified, the movable iron core is located at the first position, at the moment, the first abutting part and the second abutting part abut against the iron core assembly, only one part of the elastic element is in a compressed state, the elastic force applied to the movable iron core is small, and the influence on the valve opening operability of the electromagnetic valve is avoided; after the solenoid valve circular telegram, move the iron core and receive the effect of electromagnetic force and remove to quiet iron core direction, along with moving the axial distance between iron core and the quiet iron core and reducing, the equal butt of first butt portion, second butt portion and third butt portion in iron core subassembly, elastic element's first elasticity portion and second elasticity portion all are in compression state, and the elasticity that elastic element produced is the grow gradually, makes the iron core translation rate reduce, is favorable to reducing the impact that moves iron core and quiet iron core collision formation. In addition, first elastic part and second elastic part are an organic whole piece, are favorable to preventing that dislocation from appearing in first elastic part and second elastic part at the solenoid valve working process, improve the stability of solenoid valve work.

Drawings

Fig. 1 is a schematic sectional view of a solenoid valve according to an embodiment of the present invention;

FIG. 2 is a perspective view of the first embodiment of the elastic member in three states;

FIG. 3 is a schematic cross-sectional view of a portion of the first embodiment of the solenoid valve shown in FIG. 1 when de-energized;

FIG. 4 is a schematic cross-sectional view of a portion of the first embodiment of the solenoid valve shown in FIG. 1 when energized;

FIG. 5 is a schematic perspective view of a first embodiment of a spring element;

FIG. 6 is a perspective view of a second embodiment of the spring element;

FIG. 7 is a cross-sectional schematic view of the second embodiment of the solenoid valve shown in FIG. 1 when de-energized;

FIG. 8 is an enlarged view of a portion of the first embodiment of section A of FIG. 4;

FIG. 9 is an enlarged view of a portion of the second embodiment of section A of FIG. 4;

FIG. 10 is a cross-sectional schematic view of the third embodiment of the solenoid valve shown in FIG. 1 when de-energized;

Detailed Description

The technical solution of the present invention will be further described with reference to the accompanying drawings and the detailed description, and the technical solution mainly relates to the control and action related parts of the electromagnetic valve.

In the following description of the embodiment, for the sake of easy understanding, terms indicating directions (for example, "upper" and "lower") are used as appropriate, and the opening direction of the solenoid valve is defined as "upper".

Referring to fig. 1, the solenoid valve 100 includes a valve body 1, a coil assembly 2, a valve assembly 3, and a core assembly 4, wherein at least a portion of the valve assembly 3 is located in a cavity formed by the valve body 1, at least a portion of the core assembly 4 is located in a cavity formed by the valve assembly 3, the coil assembly 2 is sleeved on the peripheries of the portion of the valve assembly 3 and the portion of the core assembly 4, and the coil assembly 2 is relatively limited to the valve body 1. Specifically, the valve assembly 3 includes a valve seat 31, a valve core 32, and a sleeve portion 33, wherein the sleeve portion 33 is fixedly connected to the valve seat 31, in the present embodiment, the sleeve portion 33 is located above the valve seat 31, and the sleeve portion 33 is integrally provided with the valve seat 31; the valve body 1 has a receiving cavity 14 for receiving at least a part of the valve seat 31, the valve seat 31 is in relatively limited connection with the wall of the receiving cavity 14, the connection mode can be welding or threaded connection, and in the embodiment, the outer wall of the valve seat 31 is in threaded connection with the wall of the receiving cavity 14. The solenoid valve 100 includes a valve chamber 311, the wall forming the valve chamber 311 includes the wall of the valve body 1 and the wall of the valve seat 31, and the valve body 32 is located in the valve chamber 311 and can move in the valve chamber 311. The core assembly 4 includes a stationary core 41 and a movable core 42, the movable core 42 is closer to the valve element 32 than the stationary core 41 along the axial direction of the core assembly, or the movable core 42 is located below the stationary core 41, at least a part of the stationary core 41 is located in the sleeve portion 33 and fixed to the inner wall of the sleeve portion 33, at least a part of the movable core 42 is movable along the axial direction of the sleeve portion 33 in the sleeve portion 33, and a part of the movable core 42 is also movable along the axial direction of the sleeve portion 33 in the valve cavity 311. The coil assembly 2 comprises a coil part 21 and a magnetizer 22, the coil part 21 and the magnetizer 22 are clamped, the coil part 21 and the magnetizer 22 are respectively provided with corresponding through holes, the through holes of the coil part 21 and the through holes of the magnetizer 22 are coaxially arranged, and at least part of the valve assembly 3 and part of the iron core assembly 4 are positioned in the through holes of the coil part 21 and the magnetizer 22. The solenoid valve 100 further includes a screw 23 and a pad 24, in a specific embodiment, one end of the coil assembly 2 contacts the valve body 1, and the other end of the coil assembly 2 is limited by the screw 23 and the pad 24 and the core assembly 4, so that the coil assembly 2 is relatively limited by the valve body 1. The valve body 1 is formed with a first passage 11, a second passage 12 and a valve port 13, the first passage 11 is communicated with a valve cavity 14, the valve port 13 can be communicated with the valve cavity 14, the valve port 13 is communicated with the second passage 12, and a working medium can enter the valve cavity 14 from the first passage 11 and then enter the second passage 12 through the valve port 13. When the electromagnetic valve 100 is powered on or off, the movable iron core 42 can drive the valve core 32 to move along the axial direction of the sleeve part 33 in the valve cavity 311 so as to open or close the valve port 13, so that the electromagnetic valve 100 is opened or closed.

With reference to fig. 1, the solenoid valve 100 further includes an elastic element 5, at least a portion of the elastic element 5 is disposed between the stationary core 41 and the movable core 42 along the axial direction of the core assembly 4, one end of the elastic element 5 abuts against the stationary core 41, and the other end of the elastic element 5 abuts against the movable core 42, and specifically, the solenoid valve has a first recess 420, in the present embodiment, the first recess 420 is formed in the movable core 42, and the first recess 420 has an opening in the wall of the movable core 42 on the side close to the stationary core 41 along the axial direction of the movable core 42, and a part of the elastic member 5 is disposed in the first recess 420, which is advantageous for saving space and avoiding the upsizing of the structure of the solenoid valve 100, meanwhile, the first concave part 420 is beneficial to radial positioning of the elastic element 5, one end of the elastic element 5 abuts against the static iron core 41, and the other end of the elastic element 5 abuts against the bottom wall of the first concave part 420. Of course, in another embodiment, the first recess 420 may be formed in the stationary core 41, and the first recess 420 may have an opening in a wall of the stationary core 41 on the side closer to the movable core 42 along the axial direction of the stationary core 41; alternatively, the first recess 420 is formed in the stationary core 41 and the movable core 42, and the first recess 420 has openings in both the wall of the movable core 42 on the side close to the stationary core 41 and the wall of the stationary core 41 on the side close to the movable core 42 in the axial direction of the core assembly 4, and will not be described in detail.

With reference to fig. 2, the elastic element 5 comprises a first elastic portion 51 and a second elastic portion 52, and the first elastic portion 51 and the second elastic portion 52 are a single piece. Specifically, the elastic element 5 includes a first abutting portion 501, a second abutting portion 502, and a third abutting portion 503, the first elastic portion 51 extends from the second abutting portion 502 to the first abutting portion 501, and the second elastic portion 52 extends from the second abutting portion 502 to the third abutting portion 503. In the axial direction of the elastic element 5, the first abutting portion 501 is located at one end of the elastic element 5, the second abutting portion 502 is located at the other end of the elastic element 5, and in the natural state or the semi-compressed state, the third abutting portion 503 is located between the first abutting portion 501 and the second abutting portion 502, and in the fully compressed state, the third abutting portion 503 is located at the same height as the first abutting portion 501. The first elastic portion 51 and the second elastic portion 52 are coil springs, and the spring constant of the coil springs is defined by the effective number of turns of the springs, the average diameter of the springs, and the diameter of the coil of the springs, so that the elastic element 5 has a coil spring structure advantageous for adjusting the spring constant of each of the first elastic portion 51 and the second elastic portion 52. In the present embodiment, the elastic element 5 is formed by winding one spring wire, and during the manufacturing process, the spring wire is wound to form one of the first elastic part 51 and the second elastic part 52, and then wound to form the other, so that the first elastic part 51 and the second elastic part 52 form a whole piece; in other embodiments, the elastic element 5 is formed by winding two spring wires, wherein one spring wire is wound to form the first elastic portion 51, the other spring wire is wound to form the second elastic portion 52, and the first elastic portion 51 and the second elastic portion 52 are formed as a single piece by welding, which is advantageous for further adjusting the spring constants of the first elastic portion 51 and the second elastic portion 52.

First elastic component 51 and second elastic component 52 are a whole piece, are favorable to first elastic component 51 and second elastic component 52 relative position fixed, have prevented first elastic component 51 and second elastic component 52 dislocation from appearing in the motion process, make simultaneously elastic element 5 simple structure, the installation of being convenient for is favorable to improving the stability of solenoid valve work.

Referring to fig. 3 and 4, when the solenoid valve 100 is not energized, the movable iron core 42 receives the elastic force of the elastic element 5 and the gravity of the movable iron core 42, the movable iron core 42 moves downward and drives the valve element 32 to abut against the valve port 13, and at this time, the movable iron core 42 is located at the first position, and the solenoid valve 100 is closed; after the electromagnetic valve 100 is powered on, the movable iron core 42 moves towards the stationary iron core 41 under the action of electromagnetic force, the valve core 32 moves upwards and leaves the valve port 13 under the action of fluid pressure, the movable iron core 42 is in contact with the stationary iron core 41 and keeps stable, and at the moment, the movable iron core 42 is located at the second position, and the electromagnetic valve 100 is opened.

When the movable core 42 is located at the first position, the elastic element 5 is in a first compressed state, which may be a semi-compressed state, at this time, the first abutting portion 501 abuts against one of the stationary core 41 and the movable core 42, the second abutting portion 502 abuts against the other, and the third abutting portion 503 is located between the first abutting portion 501 and the second abutting portion 502, please refer to fig. 3; when the movable core 42 is located at the second position, the elastic element 5 is in the second compressed state, and the second compressed state may be a completely compressed state, at this time, the first abutting portion 501 and the third abutting portion 503 abut against one of the stationary core 41 and the movable core 42 at the same time, and the second abutting portion 502 abuts against the other one, please refer to fig. 4.

With reference to fig. 5, the first elastic portion 51 includes a first end portion 511 and a second end portion 512, the second elastic portion 52 includes a third end portion 521 and a fourth end portion 522, specifically, along the axial direction of the elastic element 5, the first end portion 511 is located at one end of the first elastic portion 51, the second end portion 512 is disposed at the other end of the first elastic portion 51, the third end portion 521 is located at one end of the second elastic portion 52, and the fourth end portion 522 is disposed at the other end of the second elastic portion 52, wherein the first abutting portion 501 includes the first end portion 511, the second abutting portion 502 includes the second end portion 512 and the fourth end portion 522, and the third abutting portion 503 includes the third end portion 521. Along the axial direction of the elastic element 5, the second end portion 512 and the fourth end portion 522 are located at the same level, and the second end portion 512 and the fourth end portion 522 are fixedly connected, so that the first elastic portion 51 and the second elastic portion 52 are favorably connected into a whole.

In the present embodiment, the inner diameter of the first elastic portion 51 is greater than the outer diameter of the second elastic portion 52, and the second elastic portion 52 is located inside the first elastic portion 51 along the radial direction of the elastic element 5, or the first elastic portion 51 is sleeved on the outer periphery of the second elastic portion 52, please refer to fig. 6. Of course, in other embodiments, the inner diameter of the first elastic portion 51 may be smaller than the outer diameter of the second elastic portion 52, and the first elastic portion 51 is located inside the second elastic portion 52 along the radial direction of the elastic element 5, or the second elastic portion 52 is sleeved on the outer circumference of the first elastic portion 51, please refer to fig. 6; in another embodiment, the first elastic portion 51 and the second elastic portion 52 are located outside each other along the radial direction of the elastic element 5, or the first elastic portion 51 and the second elastic portion 52 are arranged in parallel, and will not be described in detail.

With reference to fig. 5 and 6, along the axial direction of the elastic element 5, a distance L1 between the first end 511 and the second end 512 is an axial length of the first elastic portion 51, a distance L2 between the third end 521 and the fourth end 522 is an axial length of the second elastic portion 52, and in a natural state of the elastic element 5, an axial length L1 of the first elastic portion 51 is greater than an axial length L2 of the second elastic portion 52. In addition, in any state of the elastic element 5, the length L1 of the first elastic portion 51 and the length L2 of the second elastic portion 52 are both greater than or equal to the axial depth H of the first recess 420, or the distance between the first abutting portion 501 and the second abutting portion 502 and the distance between the third abutting portion 503 and the second abutting portion 502 are both greater than or equal to the axial depth H of the accommodating cavity 420, as shown in fig. 3, so that the first abutting portion 501, the second abutting portion 502, and the third abutting portion 503 of the elastic element 5 can abut against the stationary core 41 and the movable core 42 during the operation of the electromagnetic valve 100, thereby exerting an elastic force on the stationary core 41 and the movable core 42.

In one embodiment, referring to fig. 1, 3, 4 and 5, the first elastic portion 51 is sleeved on the outer circumference of the second elastic portion 52. When the solenoid valve 100 is not energized, the movable iron core 42 is located at the first position, the first abutting portion 501 abuts against the lower wall of the stationary iron core 41, the second abutting portion 502 abuts against the bottom wall of the first recess 420, and the third abutting portion 503 is located between the first abutting portion 501 and the second abutting portion 502, at this time, since the length of the second elastic portion 52 is shorter than the length of the first elastic portion 51, the third abutting portion 503 of the elastic element 5 does not contact with the stationary iron core 41, the second elastic portion 52 is not elastically deformed, the movable iron core 42 is not subjected to the elastic force of the second elastic portion 52, the elastic element 5 acts on the bottom end face of the first recess 420 through the elastic force provided by the first elastic portion 51, the movable iron core 42 pushes the valve element 32 toward the valve port 13, the valve element 32 closes the valve port 13, and the solenoid valve 100 is in.

When the solenoid valve 100 is energized, the coil assembly 2 attracts the movable core 42 by the electromagnetic force generated by the stationary core 41, the movable core 42 is acted by the electromagnetic force and moves toward the stationary core 41 along the axial direction of the core assembly 4, and the length L2 of the second elastic portion 52 is shorter than the length L1 of the first elastic portion 51, so that when the movable core 42 starts moving, the second elastic portion 52 does not contact the stationary core 41, and the second elastic portion 52 does not elastically deform, so that the valve opening operability of the movable core 42 is not affected by the second elastic portion 52, and at this time, the electromagnetic force applied to the movable core 42 is larger than the elastic reaction force of the first elastic portion 51, and the moving speed of the movable core 42 increases. After the movable iron core 42 moves for a certain distance, because the length L2 of the second elastic part 52 is larger than the axial depth H of the first concave part 420 in a natural state, the third end 521 of the second elastic part 52 abuts against the lower wall of the stationary iron core 41 earlier than the movable iron core 42, at this time, the movable iron core 42 is located at the second position, the first abutting part 501 and the third abutting part 503 abut against the lower wall of the stationary iron core 41 at the same time, the second abutting part 502 abuts against the bottom wall of the first concave part 420, so that the first elastic part 51 and the second elastic part 52 are both elastically deformed, at this time, the elastic forces of the first elastic part 51 and the second elastic part 52 simultaneously act on the movable iron core 42, the elastic force that the movable iron core 42 overcomes increases with the movement of the movable iron core 42, and the electromagnetic force applied to the movable iron core 42 before the movable iron core 42 collides with the stationary iron core 41 in a suction manner is smaller than the common elastic force of the first elastic part, the moving speed of the movable iron core 42 is reduced, so that the impact generated when the movable iron core 42 and the static iron core 41 are attracted and collided is reduced, and the noise generated when the collision is reduced.

In another embodiment, with reference to fig. 7, the main difference from the first embodiment is that: when the movable core 42 is located at the first position, the first contact portion 501 contacts the bottom wall of the first recess 420, and the second contact portion 502 contacts the lower wall of the stationary core 41, so that the mounting position of the elastic element 5 is flexible.

Referring to fig. 8, when the movable core 42 is located at the second position, the stationary core 41 is in contact with the movable core 42 after being attracted, and when the movable core 42 moves toward the stationary core 41, the elastic force exerted by the first elastic portion 51 and the second elastic portion 52 on the movable core 52 counteracts part of the electromagnetic force exerted on the movable core 52, so as to reduce the moving speed of the movable core 42, thereby reducing the impact caused by the attraction collision between the movable core 42 and the stationary core 41, and reducing the operating noise of the electromagnetic valve. In other embodiments, with reference to fig. 9, when the movable iron core 42 is located at the second position, the stationary iron core 41 may not be in contact with the movable iron core 42 after being attracted, and the overall elastic coefficient of the elastic element 5 is increased by adjusting the structural parameters of the first elastic portion 51 and the second elastic portion 52, so that the electromagnetic force applied to the movable iron core 42 by the elastic forces applied to the movable iron core 52 by the first elastic portion 51 and the second elastic portion 52 can balance the electromagnetic force applied to the movable iron core 42 during the attraction and movement of the movable iron core 42 to the stationary iron core 41, and finally the movable iron core 42 remains stable in a state of not contacting the stationary iron core 41, and the movable iron core 42 and the stationary iron core 41 form the first gap 402 after being attracted, which is beneficial to further reduce the impact. In addition, after the solenoid valve 100 is powered on, the first gap 402 is beneficial to improving the holding voltage of the solenoid valve 100, so that the solenoid valve 100 can be reset without being completely powered off, and the power consumption is beneficial to reducing.

In other embodiments, referring to fig. 10, the solenoid valve includes a first protrusion 421, the first protrusion 421 is located on the core assembly 4, in this embodiment, the first protrusion 421 is formed on the movable core 42, along the axial direction of the movable core 42, the first protrusion 421 is located on the surface of the movable core 42 facing the stationary core 41 and protrudes toward the stationary core 41, when the elastic element 5 is installed, the second elastic portion 52 is sleeved on the first protrusion 421, which is beneficial to improving the radial positioning effect of the elastic element 5, so as to stabilize the use performance of the solenoid valve 100, please refer to fig. 10. Of course, in another embodiment, the first convex portion 421 may be formed on the stationary core 41, and the first convex portion 421 may be located on the surface of the stationary core 41 facing the movable core 42 and protrude toward the movable core 42 in the axial direction of the stationary core 41; alternatively, the first protrusion 421 may be formed on the stationary core 41 and the movable core 42, and the first protrusion 421 is located on the surface of the movable core 42 facing the stationary core 41 and protrudes toward the stationary core 41, and the first protrusion 421 is located on the surface of the stationary core 41 facing the movable core 42 and protrudes toward the movable core 42 in the axial direction of the core assembly 4, which will not be described in detail.

The solenoid valve 100 has the following advantages by providing the elastic element 5: the first elastic part 51 and the second elastic part 52 of the elastic element 5 are an integral part, which is beneficial to increasing the integral elastic coefficient of the elastic element 5, and further improving the elastic reaction force received by the movable iron core 42 in the action process, so as to reduce the impact formed when the movable iron core 42 is attracted with the static iron core 41. The second elastic portion 52 is disposed radially inward of the first elastic portion 51, so that the internal structure of the solenoid valve 100 is not changed, which is beneficial to saving the internal space of the solenoid valve 100 and avoiding the increase in size of the solenoid valve 100 due to the addition of the buffer mechanism. The first elastic part 51 and the second elastic part 52 have a length difference, so that the force applied by the elastic element 5 to the core assembly 4 has a dynamic process, and the influence on the valve opening operability of the solenoid valve 100 caused by the excessive elastic force generated by the elastic element 4 is avoided.

The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features of the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.

Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims (7)

1. The electromagnetic valve is characterized by comprising an iron core assembly and an elastic element, wherein the iron core assembly comprises a static iron core and a movable iron core, and the elastic element is respectively abutted against the static iron core and the movable iron core along the axial direction of the iron core assembly; the elastic element comprises a first elastic part and a second elastic part, and the first elastic part and the second elastic part are a whole piece; the elastic element comprises a first abutting part, a second abutting part and a third abutting part, the first elastic part extends from the second abutting part to the first abutting part, the second elastic part extends from the second abutting part to the third abutting part, and one of the static iron core and the movable iron core abuts against the second abutting part;

when the movable iron core is located at the first position, the third abutting part is located between the first abutting part and the second abutting part, and the other of the static iron core and the movable iron core abuts against the first abutting part; when the movable iron core is located at the second position, the static iron core and the other of the movable iron core are abutted with the first abutting part and the third abutting part.

2. The solenoid valve of claim 1 wherein said first resilient portion comprises a first end and a second end, said second resilient portion comprises a third end and a fourth end; in the axial direction of the iron core assembly, the first end part is positioned at one end of the first elastic part, the second end part is positioned at the other end of the first elastic part, the third end part is positioned at one end of the second elastic part, and the fourth end part is positioned at the other end of the second elastic part; the first abutment comprises the first end, the third abutment comprises the third end, and the second abutment comprises the second end and the fourth end.

3. The electromagnetic valve according to claim 2, characterized in that at least a part of the first elastic part is sleeved on the periphery of the second elastic part; or at least part of the second elastic part is sleeved on the periphery of the first elastic part; or the first elastic part and the second elastic part are both positioned on the outer sides of the other part.

4. The solenoid valve according to any one of claims 1 to 3, wherein the solenoid valve has a first recess formed in the movable core and/or the stationary core, the first recess having an opening in a wall of the movable core on a side close to the stationary core and/or a wall of the stationary core on a side close to the movable core in an axial direction of the core assembly; at least part of the elastic element is positioned in the first concave part; along the axial of iron core subassembly, the distance between first butt portion with the second butt portion is more than or equal to the axial depth of first recess, the distance between third butt portion with the second butt portion is more than or equal to the axial depth of first recess.

5. The solenoid valve according to claim 4, characterized in that it has a first protrusion formed on at least one of said plunger and said stationary core; the first convex part is positioned on the surface of the movable iron core facing the static iron core and is convex to the static iron core along the axial direction of the iron core assembly; and/or the first convex part is positioned on the surface of the static iron core facing the movable iron core and is convex to the movable iron core; the elastic element is sleeved on the first convex part.

6. The solenoid valve according to claim 5, wherein when the movable iron core is located at the second position, the solenoid valve comprises a first gap, and the first gap is located between the static iron core and the movable iron core along the axial direction of the iron core assembly; the wall forming the gap comprises a lower wall of the static iron core and an upper wall of the movable iron core.

7. The electromagnetic valve according to claim 1, wherein the first elastic portion and the second elastic portion are coil springs, and at least a part of the first elastic portion is sleeved on an outer periphery of the second elastic portion; the solenoid valve comprises a first concave part which is formed on the movable iron core, the first concave part is provided with an opening on the wall of the movable iron core close to the static iron core along the axial direction of the iron core assembly, and part of the elastic element is positioned in the first concave part; the solenoid valve includes first convex part, first convex part take shape in move the iron core, follow the axial of iron core subassembly, first convex part is located move the iron core towards the surface of quiet iron core side and protruding to quiet iron core, the elastic element cover is located first convex part.

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