CN115560080A

CN115560080A - Electromagnetic valve and air conditioning equipment

Info

Publication number: CN115560080A
Application number: CN202110749319.4A
Authority: CN
Inventors: 田鹏
Original assignee: Zhejiang Dunan Machinery Co Ltd
Current assignee: Zhejiang Dunan Machinery Co Ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2023-01-03

Abstract

The invention relates to an electromagnetic valve and air conditioning equipment. The valve body is provided with a valve cavity, a valve port is arranged in the valve body, and the axial direction of the valve port is the first direction. The valve core is movably arranged in the valve cavity along a first direction to be close to or far away from the valve port so as to open or close the valve port. The rotation stopping structure comprises a slide rail part and a slide block part, one of the slide rail part and the slide block part is fixedly arranged on the valve body, the other of the slide rail part and the slide block part is fixedly arranged on the valve core, and the slide rail part and the slide block part are in sliding fit along the first direction. So set up, the case can't take place to rotate around the axial of valve port.

Description

Electromagnetic valve and air conditioning equipment

Technical Field

The invention relates to the technical field of refrigeration, in particular to an electromagnetic valve and air conditioning equipment.

Background

The electromagnetic valve comprises a valve body and a valve core, wherein certain processing errors exist in the valve core and the valve body, so that the sealing surface of the joint of the valve core and the valve body is irregular, and the sealing performance of the electromagnetic valve can be influenced. Therefore, after the valve core and the valve body are assembled, the valve core and the valve body are usually mutually extruded to reduce a gap at the sealing position of the valve core and the valve body and improve the sealing performance of the valve core and the valve body. And the valve core and the valve body after extrusion processing can form a sealing curve or a sealing curved surface with irregular shapes at the sealing position. However, when the solenoid valve is in an open state, the valve core is easily impacted by fluid to rotate, so that when the solenoid valve is in a closed state, the valve core is separated from the original sealing position, the valve core and the valve body cannot form good sealing, and the solenoid valve has the risk of leakage.

Disclosure of Invention

In view of the above, it is desirable to provide a solenoid valve and an air conditioner, which solve the problem that the valve core of the solenoid valve is easy to rotate.

The invention provides an electromagnetic valve which comprises a valve body, a valve core and a rotation stopping structure. The valve body is provided with a valve cavity, a valve port is arranged in the valve body, and the axial direction of the valve port is the first direction. The valve core is movably arranged in the valve cavity along a first direction to be close to or far away from the valve port so as to open or close the valve port. The rotation stopping structure comprises a sliding rail part and a sliding block part, one of the sliding rail part and the sliding block part is fixedly arranged on the valve body, the other of the sliding rail part and the sliding block part is fixedly arranged on the valve core, and the sliding rail part and the sliding block part are in sliding fit along the first direction.

In an embodiment of the present invention, a check ring is disposed on an inner wall of the valve body, the check ring is disposed on a side of the valve core away from the valve port, and the check ring is configured to limit a movement stroke of the valve core in the valve body.

In an embodiment of the invention, the slide rail portion includes a first groove disposed at one end of the valve core facing the retainer ring and extending along the first direction, and the slider portion includes a first protrusion disposed on the retainer ring, the first protrusion extending toward the valve core and extending into the first groove. The first groove is formed in one end, facing the retainer ring, of the valve core, so that the machining difficulty of the sliding rail portion is greatly reduced, and the machining efficiency of the electromagnetic valve is improved. And set up on the retaining ring with first recess sliding fit's first arch for the structure of solenoid valve is compacter, has improved the space utilization of solenoid valve.

In an embodiment of the present invention, a length of the first protrusion along the first direction is greater than a length of a stroke of the valve core along the first direction, and a length of the first groove along the first direction is greater than the length of the stroke of the valve core along the first direction.

In an embodiment of the invention, the slide rail portion includes a second groove disposed in the retainer ring and extending along the first direction, and the slider portion includes a second protrusion disposed in the valve core, and the second protrusion extends toward the retainer ring and into the second groove. The check ring is located to the second recess, greatly reduced the processing degree of difficulty of slide rail portion, improved the machining efficiency of solenoid valve. The valve core is provided with the second bulge in sliding fit with the second groove, so that the structure of the electromagnetic valve is more compact, and the space utilization rate of the electromagnetic valve is improved.

In an embodiment of the present invention, a length of the second protrusion along the first direction is greater than a length of a stroke of the valve element along the first direction, and a length of the second groove along the first direction is greater than the length of the stroke of the valve element along the first direction.

In an embodiment of the invention, the slide rail portion includes a third groove disposed on an outer wall of the valve core, the third groove extends along the first direction, the slider portion includes a third protrusion disposed on the valve body, and the third protrusion extends toward the valve core and into the third groove. Therefore, the structure of the electromagnetic valve is simpler, and the assembly efficiency of the electromagnetic valve is improved.

In an embodiment of the invention, a length of the third protrusion along the first direction is greater than a length of a stroke of the valve core along the first direction, and a length of the third groove along the first direction is greater than the length of the stroke of the valve core along the first direction.

In an embodiment of the present invention, the inner wall of the valve body is provided with a stopping step, the stopping step is located on a side of the valve core away from the valve port, and the stopping step is used for limiting a moving stroke of the valve core in the valve body. Therefore, the movement of the valve core in the valve body is effectively limited, and the situation that the slide block part of the valve core is separated from the slide rail part to influence the use of the electromagnetic valve is avoided.

In an embodiment of the present invention, the valve element is in sealing fit with the valve body, and the valve element divides the valve chamber into a first chamber close to the valve port and a second chamber far from the valve port, the valve element is provided with a pressure increasing channel, the pressure increasing channel is communicated with the first chamber and the second chamber, the valve element is further provided with a pressure reducing channel penetrating end faces of two ends, when the valve element closes the valve port, the pressure reducing channel is communicated with the valve port, and when the valve element opens the valve port, the pressure reducing channel is communicated with the first chamber and the second chamber. Through setting up increase passageway and decompression passageway, reduced the degree of difficulty that the case removed in the valve body, improved the break-make efficiency of solenoid valve.

In an embodiment of the present invention, the valve further includes a power assembly disposed in the valve body, and the power assembly is located on a side of the valve core away from the valve port. The power assembly comprises a static iron core, a movable iron core and a compression spring, the static iron core is fixedly connected with the valve body, and the movable iron core is movably arranged in the valve body so as to open or close the pressure reduction channel; compression spring one end is connected quiet iron core other end and is connected and move the iron core, and compression spring has the trend that promotes to move the iron core and move towards the direction of keeping away from quiet iron core.

In an embodiment of the present invention, one end of the movable iron core is connected to a plugging member, and the plugging member is a sphere. Generally, the pressure reducing channel is a circular hole, so that the spherical plugging piece can form a line seal with the opening of the pressure reducing channel, and the sealing effect of the movable iron core on the pressure reducing channel is enhanced.

The invention also provides air conditioning equipment which comprises the electromagnetic valve in any one of the embodiments.

According to the electromagnetic valve and the air conditioning equipment provided by the invention, the electromagnetic valve is provided with the rotation stopping structure, the rotation stopping structure comprises the sliding rail part and the sliding block part, and the sliding rail part and the sliding block part are in sliding fit along the first direction, so that the movement direction of relative movement between the sliding rail part and the sliding block part is limited in the first direction, namely, the sliding block part can only move along the first direction relative to the sliding rail part and cannot rotate relative to the sliding rail part. Because one of the slide rail part and the slide block part is fixedly arranged on the valve body, and the other is fixedly arranged on the valve core, the movement of the valve core in the valve body is limited by the slide rail part and the slide block part, so that the valve core can only move along the first direction, and the valve core can not rotate relative to the valve body in the opening and closing process of the electromagnetic valve, thereby ensuring the good sealing effect between the valve core and the valve body and reducing the risk of liquid leakage.

Drawings

FIG. 1 is a cross-sectional view of a solenoid valve according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a retainer ring with a first protrusion according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a valve core with a first groove according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a solenoid valve according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a retainer ring provided with a second groove according to another embodiment of the present invention;

FIG. 6 is a schematic view of a valve cartridge with second protrusions according to another embodiment of the present invention;

FIG. 7 is a cross-sectional view of a solenoid valve according to yet another embodiment of the present invention;

FIG. 8 is a schematic structural view of a valve body provided with a third protrusion according to still another embodiment of the present invention;

fig. 9 is a schematic structural view of a valve core provided with a third groove according to still another embodiment of the present invention.

Reference numerals are as follows: 1. a valve body; 11. a valve cavity; 111. a first chamber; 112. a second chamber; 12. a valve port; 13. a liquid inlet; 14. a liquid outlet; 15. a stopping step; 2. a valve core; 21. a pressurizing passage; 22. a pressure reducing channel; 3. a rotation stopping structure; 31. a slide rail portion; 311. a first groove; 312. a second groove; 313. a third groove; 32. a slider portion; 321. a first protrusion; 322. a second protrusion; 323. a third protrusion; 33. a retainer ring; 4. a power assembly; 41. a stationary iron core; 42. a movable iron core; 43. a compression spring; 44. a closure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below 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. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly mounted on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, 4 and 7, the present invention provides a solenoid valve including a valve body 1 and a valve cartridge 2. The valve body 1 is equipped with valve pocket 11, and is equipped with valve port 12 in the valve body 1, and the axial of valve port 12 is the first direction. The valve core 2 is in sealing fit with the valve body 1, and the valve core 2 is movably arranged in the valve cavity 11 along a first direction to be close to or far away from the valve port 12 so as to open or close the valve port 12. Specifically, the valve core 2 divides the valve chamber 11 into a first chamber 111 close to the valve port 12 and a second chamber 112 far away from the valve port 12, and the valve body 1 is provided with a liquid inlet 13 and a liquid outlet 14, the liquid inlet 13 is communicated with the first chamber 111, and the liquid outlet 14 is communicated with the valve port 12. When the valve port 12 is opened by the valve core 2, the valve port 12 is communicated with the first cavity 111, and at the moment, the liquid inlet 13 is communicated with the liquid outlet 14. When the valve core 2 closes the valve port 12, the valve port 12 is not communicated with the first cavity 111, and at the same time, the liquid inlet 13 is not communicated with the liquid outlet 14.

Further, the electromagnetic valve further comprises a power assembly 4 arranged in the valve cavity 11, the power assembly 4 is located on a side of the valve core 2 away from the valve port 12, and the power assembly 4 is used for pushing the valve core 2 to move so that the valve core 2 closes the valve port 12.

The basic working principle of the electromagnetic valve provided by the invention is as follows: when the power assembly 4 pushes the valve core 2 to move towards the valve port 12, the valve core 2 can close the valve port 12, so that the liquid inlet 13 and the liquid outlet 14 are separated, and the electromagnetic valve is in a closed state at the moment. When the power assembly 4 moves in a direction away from the valve element 2, the refrigerant flows into the first cavity 111 from the liquid inlet 13, so that the pressure in the first cavity 111 rises, and when the pressure applied to the valve element 2 by the refrigerant in the first cavity 111 reaches a certain degree, the refrigerant can push the valve element 2 to move in a direction away from the valve port 12, so that the valve port 12 is opened, the valve port 12 is communicated with the first cavity 111, and the refrigerant can flow through the valve port 12 from the first cavity 111 and finally flow out of the solenoid valve from the liquid outlet 14.

When the power assembly 4 pushes the valve element 2 to move toward the valve port 12, the volume of the second chamber 112 is enlarged, and at this time, the air pressure in the second chamber 112 decreases, so that the air pressure in the second chamber 112 is smaller than the air pressure in the first chamber 111, and the air pressure in the second chamber 112 smaller than the air pressure in the first chamber 111 hinders the valve element 2 from moving toward the valve port 12, so that the valve port 12 is difficult to be closed smoothly by the valve element 2. To solve this problem, in one embodiment, the spool 2 is provided with a pressurizing passage 21, and the pressurizing passage 21 communicates the first chamber 111 and the second chamber 112. In this way, when the power assembly 4 pushes the valve element 2 to move toward the valve port 12, the fluid in the first chamber 111 may enter the second chamber 112 through the pressurization channel 21, so as to increase the air pressure in the second chamber 112, thereby balancing the air pressure difference between the first chamber 111 and the second chamber 112, and enabling the valve element 2 to move smoothly to close the valve port 12.

When the power assembly 4 moves away from the valve element 2, the volume of the second chamber 112 decreases, and at this time, the air pressure in the second chamber 112 increases, so that the air pressure in the second chamber 112 is greater than the air pressure in the first chamber 111, and the air pressure in the second chamber 112 greater than the air pressure in the first chamber 111 hinders the valve element 2 from moving away from the valve port 12. In one embodiment, the valve core 2 is further provided with a pressure reducing channel 22 penetrating end surfaces of both ends, and when the valve core 2 opens the valve port 12, the pressure reducing channel 22 communicates the first chamber 111 and the second chamber 112. Thus, when the refrigerant pushes the valve element 2 to move in a direction away from the valve port 12, the gas and the refrigerant in the second chamber 112 may enter the first chamber 111 through the decompression channel 22 to reduce the pressure in the second chamber 112, thereby balancing the pressure difference between the first chamber 111 and the second chamber 112, and enabling the valve element 2 to smoothly move in a direction away from the valve port 12.

In conclusion, the increasing channel and the pressure reducing channel 22 are arranged, so that the difficulty of the valve core 2 moving in the valve body 1 is reduced, and the on-off efficiency of the electromagnetic valve is improved.

Further, as shown in fig. 1, the power assembly 4 includes a stationary core 41, a movable core 42, and a compression spring 43. The plunger 42 is movably disposed in the valve body 1 to open or close the pressure-reducing passage 22. Specifically, one end of the movable iron core 42 is connected with a blocking piece 44, and the blocking piece 44 is a sphere. Typically, the pressure-relief passage 22 is a circular hole, and thus, the spherical stopper 44 can form a line seal with the opening of the pressure-relief passage 22, enhancing the sealing effect of the plunger 42 on the pressure-relief passage 22. The stationary iron core 41 is fixedly connected to the valve body 1, one end of the compression spring 43 is connected to the stationary iron core 41, the other end of the compression spring 43 is connected to the movable iron core 42, and the compression spring 43 has a tendency of pushing the movable iron core 42 to move towards a direction away from the stationary iron core 41.

The working principle of the power assembly 4 is as follows: the outside of the electromagnetic valve is provided with a stator assembly (not shown), when the stator assembly is electrified, the stator assembly generates a magnetic field and magnetizes the movable iron core 42, the movable iron core 42 overcomes the elastic force of the compression spring 43 and attracts the stationary iron core 41, and the movable iron core 42 drives the blocking piece 44 to be far away from the valve core 2 and opens the pressure reduction channel 22. When the stator assembly is powered off, the movable iron core 42 moves to return to the original position under the action of the elastic force of the compression spring 43, and the blocking piece 44 moves towards the valve core 2 along with the movable iron core 42 so as to block the pressure reduction channel 22 and push the valve core 2 to move towards the valve port 12 so as to block the valve port 12.

Further, the electromagnetic valve further includes a rotation stopping structure 3, as shown in fig. 1, the rotation stopping structure 3 includes a sliding rail portion 31 and a sliding block portion 32, one of the sliding rail portion 31 and the sliding block portion 32 is fixedly disposed on the valve body 1, the other is fixedly disposed on the valve core 2, and the sliding rail portion 31 and the sliding block portion 32 are in sliding fit along the first direction. Note that the phrase "the slide rail portion 31 and the slider portion 32 are slidably engaged in the first direction" means that the slide portion and the slider portion 32 are slidably engaged with each other, and the relative sliding direction between the slide portion and the slider portion 32 is limited to the first direction.

Since the electromagnetic valve is provided with the rotation stopping structure 3, the rotation stopping structure 3 includes the slide rail portion 31 and the slider portion 32, and the slide rail portion 31 and the slider portion 32 are slidably engaged in the first direction, so that the moving direction of the relative movement between the slide rail portion 31 and the slider portion 32 is limited to the first direction, that is, the slider portion 32 can only move in the first direction relative to the slide rail portion 31, and cannot rotate relative to the slide rail portion 31. Because one of the slide rail part 31 and the slide block part 32 is fixedly arranged on the valve body 1, and the other is fixedly arranged on the valve core 2, the movement of the valve core 2 in the valve body 1 is limited by the slide rail part 31 and the slide block part 32, so that the valve core 2 can only move along the first direction, and the valve core 2 can not rotate relative to the valve body 1 in the opening and closing processes of the electromagnetic valve, thereby ensuring the good sealing effect between the valve core 2 and the valve body 1, and reducing the risk of liquid leakage.

In one embodiment, as shown in fig. 1-3, the inner wall of the valve body 1 is provided with a retaining ring 33, the retaining ring 33 is disposed on a side of the valve element 2 away from the valve port 12, and the retaining ring 33 is used for limiting a moving stroke of the valve element 2 in the valve body 1. The slide rail portion 31 includes a first groove 311 disposed at one end of the valve element 2 facing the retainer 33 and extending along a first direction, and the slide block portion 32 includes a first protrusion 321 disposed on the retainer 33, wherein the first protrusion 321 extends toward the valve element 2 and extends into the first groove 311. The first groove 311 is formed in one end, facing the retainer ring 33, of the valve core 2, so that the machining difficulty of the sliding rail part 31 is greatly reduced, and the machining efficiency of the electromagnetic valve is improved. Specifically, the first groove 311 is disposed on the outer side of the valve element 2, so that the difficulty in processing the slide rail portion 31 is further reduced. The number of the first grooves 311 is plural, and the plural first grooves 311 are uniformly distributed along the circumferential direction of the valve body 2, and correspondingly, the number of the first protrusions 321 is also plural, and the plural first protrusions 321 are uniformly distributed along the circumferential direction of the retainer ring 33. Thus, the fitting accuracy of the slider portion 32 and the rail portion 31 is improved. And the retainer ring 33 is provided with the first protrusion 321 in sliding fit with the first groove 311, so that the structure of the electromagnetic valve is more compact, and the space utilization rate of the electromagnetic valve is improved. In this embodiment, the first protrusion 321 is integrally formed with the retainer ring 33, which is beneficial to improving the structural strength of the solenoid valve.

Further, the length of the first protrusion 321 in the first direction is greater than the stroke length of the valve core 2 in the first direction, and the length of the first groove 311 in the first direction is greater than the stroke length of the valve core 2 in the first direction, so that the first protrusion 321 is ensured not to be disengaged from the first groove 311 during the movement of the valve core 2.

In another embodiment, as shown in fig. 4-6, a retainer 33 is disposed on the inner wall of the valve body 1, the retainer 33 is disposed on a side of the valve core 2 away from the valve port 12, and the retainer 33 is used for limiting the moving stroke of the valve core 2 in the valve body 1. The slide portion 31 includes a second groove 312 disposed in the retainer 33 and extending along the first direction, and the slide portion 32 includes a second protrusion 322 disposed on the valve core 2, wherein the second protrusion 322 extends toward the retainer 33 and extends into the second groove 312. The second groove 312 is formed in the retainer ring 33, so that the processing difficulty of the sliding rail portion 31 is greatly reduced, and the processing efficiency of the electromagnetic valve is improved. Specifically, the second groove 312 is disposed on the inner side of the retainer ring 33, so that the difficulty in processing the slide rail portion 31 is further reduced. The number of the second grooves 312 is plural, and the plural second grooves 312 are uniformly distributed along the circumferential direction of the retainer ring 33, and correspondingly, the number of the second protrusions 322 is also plural, and the plural second protrusions 322 are uniformly distributed along the circumferential direction of the valve body 2. Thus, the fitting accuracy of the slider portion 32 and the rail portion 31 is improved. And the second protrusion 322 which is in sliding fit with the second groove 312 is arranged on the valve core 2, so that the structure of the electromagnetic valve is more compact, and the space utilization rate of the electromagnetic valve is improved. In this embodiment, the second protrusion 322 is integrally formed with the valve core 2, which is beneficial to improving the structural strength of the solenoid valve.

Further, the length of the second protrusion 322 in the first direction is greater than the stroke length of the valve core 2 in the first direction, and the length of the second groove 312 in the first direction is greater than the stroke length of the valve core 2 in the first direction, so that the second protrusion 322 cannot be disengaged from the second groove 312 during the movement of the valve core 2.

In yet another embodiment, as shown in fig. 7 to 9, the slide rail portion 31 includes a third groove 313 formed in an outer wall of the valve body 2, the third groove 313 extends in the first direction, and the slider portion 32 includes a third protrusion 323 formed in the valve body 1, the third protrusion 323 extends toward the valve body 2 and protrudes into the third groove 313. Therefore, the structure of the electromagnetic valve is simpler, and the assembly efficiency of the electromagnetic valve is improved. Further, the valve body 1 is cylindrical, the third protrusion 323 is elongated, the inner wall of the valve body 1 protrudes along the radial direction of the valve body 1 to form the third protrusion 323, and further, the side wall of the valve body 1 is formed to form the third protrusion 323 by means of stamping or pressing. Therefore, the connection strength of the third protrusion 323 and the valve body 1 is improved, and the service life of the electromagnetic valve is prolonged. The number of the third grooves 313 is plural, and the plural third grooves 313 are uniformly distributed along the circumferential direction of the outer wall of the valve body 2, and correspondingly, the number of the third protrusions 323 is plural, and the plural third protrusions 323 are uniformly distributed along the circumferential direction of the valve body 1. Thus, the fitting accuracy of the slider portion 32 and the rail portion 31 is improved. It should be noted that, in the present embodiment, the third groove 313 penetrates through both side end surfaces of the valve core 2, and the depth of the third groove 313 along the radial direction of the valve core 2 is greater than the height of the third protrusion 323 along the radial direction of the valve core 2, at this time, the third groove 313 may also serve as the pressure increasing channel 21 to communicate the first chamber 111 and the second chamber 112.

Further, the length of the third protrusion 323 in the first direction is greater than the stroke length of the valve core 2 in the first direction, and the length of the third groove 313 in the first direction is greater than the stroke length of the valve core 2 in the first direction, so that the third protrusion 323 cannot be disengaged from the third groove 313 during the movement of the valve core 2.

Further, as shown in fig. 7, the inner wall of the valve body 1 is provided with a stop step 15, the stop step 15 is located on a side of the valve core 2 away from the valve port 12, and the stop step 15 is used for limiting a moving stroke of the valve core 2 in the valve body 1. Specifically, the inner wall of the valve body 1 is formed with a stopper step 15 by extrusion processing. Thus, the movement of the valve core 2 in the valve body 1 is effectively limited, and the slide part 32 of the valve core 2 is prevented from being separated from the slide rail part 31 to influence the use of the electromagnetic valve.

The features of the above-described embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of the features in the above-described embodiments will not be described in detail, but should be construed as being within the scope of the present disclosure unless there is any conflict between such combinations of features.

It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.

Claims

1. A solenoid valve, comprising

The valve comprises a valve body (1) provided with a valve cavity (11), wherein a valve port (12) is arranged in the valve body (1), and the axial direction of the valve port (12) is a first direction;

the valve core (2) is movably arranged in the valve cavity (11) along a first direction to be close to or far away from the valve port (12) so as to open or close the valve port (12); and

the rotation stopping structure (3) comprises a sliding rail part (31) and a sliding block part (32), one of the sliding rail part (31) and the sliding block part (32) is fixedly arranged on the valve body (1), the other one of the sliding rail part (31) and the sliding block part (32) is fixedly arranged on the valve core (2), and the sliding rail part (31) and the sliding block part (32) are in sliding fit along the first direction.

2. The electromagnetic valve according to claim 1, characterized in that a retaining ring (33) is provided on the inner wall of the valve body (1), the retaining ring (33) is provided on the side of the valve core (2) away from the valve port (12), and the retaining ring (33) is used for limiting the movement stroke of the valve core (2) in the valve body (1).

3. The solenoid valve according to claim 2, wherein the slide portion (31) comprises a first groove (311) provided at an end of the spool (2) facing the retainer (33) and extending in a first direction, and the slide portion (32) comprises a first protrusion (321) provided at the retainer (33), and the first protrusion (321) extends toward the spool (2) and extends into the first groove (311).

4. The solenoid valve according to claim 3, characterized in that the length of the first protrusion (321) in the first direction is greater than the length of the stroke of the spool (2) in the first direction, and the length of the first recess (311) in the first direction is greater than the length of the stroke of the spool (2) in the first direction.

5. The solenoid valve according to claim 2, wherein the slide portion (31) includes a second groove (312) provided in the retainer ring (33) and extending in the first direction, and the slide portion (32) includes a second protrusion (322) provided in the spool (2), the second protrusion (322) extending toward the retainer ring (33) and extending into the second groove (312).

6. The solenoid valve according to claim 5, characterized in that the length of the second protrusion (322) in the first direction is greater than the length of the stroke of the spool (2) in the first direction and the length of the second recess (312) in the first direction is greater than the length of the stroke of the spool (2) in the first direction.

7. The solenoid valve according to claim 1, characterized in that the slide portion (31) comprises a third groove (313) provided in the outer wall of the spool (2), the third groove (313) extending in the first direction, the slide portion (32) comprises a third protrusion (323) provided in the valve body (1), the third protrusion (323) extending towards the spool (2) and into the third groove (313).

8. The solenoid valve according to claim 7, characterized in that the length of the third protrusion (323) in the first direction is greater than the length of the stroke of the spool (2) in the first direction, and the length of the third groove (313) in the first direction is greater than the length of the stroke of the spool (2) in the first direction.

9. The solenoid valve according to claim 7, characterized in that the inner wall of the valve body (1) is provided with a stop step (15), the stop step (15) is located on the side of the valve core (2) far away from the valve port (12), and the stop step (15) is used for limiting the moving stroke of the valve core (2) in the valve body (1).

10. The solenoid valve according to claim 1, characterized in that the spool (2) is in sealing engagement with the valve body (1) and the spool (2) divides the valve chamber (11) into a first chamber (111) close to the valve port (12) and a second chamber (112) remote from the valve port (12),

the valve core (2) is provided with a pressurization channel (21), the pressurization channel (21) is communicated with the first cavity (111) and the second cavity (112),

the valve core (2) is further provided with a pressure reducing channel (22) penetrating through end faces of two ends, when the valve core (2) closes the valve port (12), the pressure reducing channel (22) is communicated with the valve port (12), and when the valve core (2) opens the valve port (12), the pressure reducing channel (22) is communicated with the first cavity (111) and the second cavity (112).

11. The electromagnetic valve according to claim 10, characterized by further comprising a power assembly (4) arranged in the valve body (1), wherein the power assembly (4) is positioned on one side of the valve core (2) far away from the valve port (12);

the power assembly (4) comprises a static iron core (41), a movable iron core (42) and a compression spring (43), the static iron core (41) is fixedly connected to the valve body (1), and the movable iron core (42) is movably arranged in the valve body (1) to open or close the pressure reducing channel (22); compression spring (43) one end is connected quiet iron core (41) other end is connected move iron core (42), compression spring (43) have promote move iron core (42) towards the trend of keeping away from the direction removal of quiet iron core (41).

12. The solenoid valve according to claim 11 wherein a closure member (44) is attached to one end of the plunger (42), said closure member (44) being a ball.

13. Air conditioning unit, characterized in that it comprises a solenoid valve according to any one of claims 1 to 12.