CN220134642U - Solenoid valve and air conditioning system - Google Patents

Abstract

The utility model relates to the technical field of refrigeration, in particular to an electromagnetic valve and an air conditioning system. The solenoid valve includes a valve body and a valve cartridge assembly. The valve body is provided with a valve cavity and an assembly port communicated with the valve cavity, at least part of the valve core assembly is arranged in the valve cavity through the assembly port, and the bottom wall of the valve cavity, which is far away from the assembly port, is provided with an outer through hole used for communicating the valve cavity with an external connecting pipe. The side wall of the valve cavity far away from one end of the assembly port is provided with an avoidance groove. Along the direction of the valve cavity from one end close to the assembly port to one end far away from the assembly port, the side wall of the avoidance groove extends towards the direction far away from the central axis of the valve cavity, a plane perpendicular to the central axis of the valve cavity is defined as a projection surface, and along the central axis direction of the valve cavity, the projection of the side wall of the avoidance groove on the projection surface and the projection of the opening of the outer through hole communicated with the valve cavity on the projection surface are not overlapped. The electromagnetic valve and the air conditioning system solve the problem that the existing electromagnetic valve can interfere with the inner wall of the valve cavity when a vertical hole is machined.

Description

Solenoid valve and air conditioning system

Technical Field

The utility model relates to the technical field of refrigeration, in particular to an electromagnetic valve and an air conditioning system.

Background

The electromagnetic valve is equipment for controlling the on-off of a flow path by utilizing electric drive, and is widely applied to the selective control of a fluid path in an air conditioning system.

The existing electromagnetic valve comprises a valve body and a valve core assembly, wherein a valve cavity, a vertical hole communicated with the valve cavity and a valve port are arranged in the valve body, and the valve core assembly can block or open the valve port so as to realize the communication or separation between the vertical hole and the valve port. However, when the existing electromagnetic valve is used for machining vertical holes, the machining tool is easy to deviate from the direction due to factors such as machining errors of operators, so that the machining tool can touch the inner wall of the valve cavity, damage to the inner wall of the valve cavity is caused, the forming rate of the valve body is reduced, and the machining cost of the electromagnetic valve is increased.

Disclosure of Invention

Based on this, it is necessary to provide a solenoid valve and an air conditioning system to solve the problem that the conventional solenoid valve interferes with the inner wall of the valve cavity when machining the vertical hole.

The utility model provides a solenoid valve, which comprises a valve body and a valve core assembly; the valve body is provided with a valve cavity and an assembly port communicated with the valve cavity, at least part of the valve core assembly is arranged in the valve cavity through the assembly port, and the bottom wall of the valve cavity far away from the assembly port is provided with an outer through hole used for communicating the valve cavity with an external connecting pipe; the side wall of the valve cavity, which is far away from one end of the assembly port, is provided with an avoidance groove, the side wall of the avoidance groove extends towards the direction away from the central axis of the valve cavity along the direction from one end of the valve cavity, which is close to the assembly port, to one end of the assembly port, a plane perpendicular to the central axis of the valve cavity is defined as a projection surface, and the projection of the side wall of the avoidance groove on the projection surface and the projection of the opening of the valve cavity, which is communicated by the outer through hole, on the projection surface are not overlapped with each other along the central axis direction of the valve cavity.

In one embodiment, the outer through hole comprises a first through hole and a second through hole, the valve body is further provided with a first channel and a second channel, one end of the first through hole is communicated with the second through hole through the valve cavity, and the other end of the first through hole is communicated with the first channel; one end of the second through hole is communicated with the valve cavity, and the other end of the second through hole is communicated with the second channel; the valve core assembly can move towards a direction approaching to or far from the first through hole so as to communicate or isolate the first through hole and the valve cavity; the central axis of the first through hole is coaxial with the central axis of the valve cavity, and the central axis of the second through hole is parallel to the central axis of the valve cavity.

By this arrangement, fluid can circulate in the solenoid valve.

In one embodiment, the valve body comprises a main body part and a conical part, the valve cavity is arranged on the main body part, one end of the conical part is arranged at one end of the valve cavity far away from the assembly port and is connected with the main body part, and the other end of the conical part extends towards the direction close to the assembly port; the first through hole penetrates through the conical portion along the central axis direction of the valve cavity, and the valve core assembly can be in movable fit with the conical portion so as to communicate or isolate the valve cavity and the first through hole.

This arrangement can prevent the flow of the fluid.

In one embodiment, the cross-sectional area of the tapered portion gradually decreases along the central axis direction of the valve chamber from a direction away from the fitting port to a direction closer to the fitting port.

By the arrangement, the inner volume of the valve cavity can be increased.

In one embodiment, along the central axis direction of the valve cavity, the projection of the second through hole on the projection surface and the projection of the outer wall of the conical part on the projection surface are not overlapped.

So set up, can avoid causing the damage to the structure of toper portion, improve the shaping rate of product.

In one embodiment, the electromagnetic valve further comprises a sleeve, the sleeve is sleeved on the valve core assembly, one end of the sleeve is inserted into the valve cavity through the assembly opening, and the sleeve is detachably connected with the inner wall of the valve cavity.

So set up, can practice thrift processing cost to improve assembly efficiency.

In one embodiment, a step structure is arranged on the inner wall of the valve cavity, and a step surface of the step structure is stopped at one end, close to the outer through hole, of the sleeve.

So set up, greatly improved telescopic installation effectiveness.

In one embodiment, the valve core assembly comprises a movable iron core, a static iron core and a sealing element, wherein the static iron core is fixedly connected to the sleeve, the movable iron core is movably matched with the static iron core, the sealing element is connected to one end of the movable iron core, which is far away from the static iron core, and the movable iron core can drive the sealing element to move along the central axis direction of the valve cavity, so that the sealing element can open or close the first through hole.

By the arrangement, the circulation control of the fluid in the electromagnetic valve can be realized.

In one embodiment, the valve core assembly further includes a first elastic member and a second elastic member, the movable iron core is provided with a first accommodating hole and a second accommodating hole, the first elastic member is provided in the first accommodating hole, and the movable iron core is connected to the static iron core through the first elastic member, so that the first elastic member has a tendency of pushing the movable iron core to move towards the position close to the outer through hole; the second elastic piece and the sealing piece are arranged in the second accommodating hole, and the sealing piece is connected to the movable iron core through the second elastic piece, so that the second elastic piece has a trend of pushing the sealing piece to move towards the position close to the outer through hole.

Thus, the solenoid valve can be miniaturized.

The utility model also provides an air conditioning system comprising the electromagnetic valve according to any one of the embodiments.

Compared with the prior art, the electromagnetic valve and the air conditioning system provided by the utility model have the advantages that the avoidance groove is processed on the inner wall of the valve cavity, the projection of the side wall of the avoidance groove on the projection surface and the projection of the opening of the outer through hole communicated with the valve cavity on the projection surface are not overlapped, that is, a certain distance exists between the outer through hole and the side wall of the avoidance groove, so that when an external tool stretches into the valve cavity along the central axis direction of the valve cavity to process the outer through hole, even if the external tool deviates, the side wall of the avoidance groove, namely the inner wall of the valve cavity, is not contacted with the processing tool, and further the damage of the processing tool to the inner wall of the valve cavity can be avoided, and the normal use of the electromagnetic valve is ensured. And, so set up, also be convenient for process outer through-hole, can improve the machining efficiency of outer through-hole. On the other hand, the arrangement of the avoidance groove increases the inner volume of the valve cavity to a certain extent, and reduces the flow resistance of fluid.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present utility model, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following descriptions are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

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

FIG. 2 is a cross-sectional view of a solenoid valve according to one embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a valve body according to one embodiment of the present utility model;

fig. 4 is a top view of a valve body according to an embodiment of the present utility model.

The symbols in the drawings are as follows:

100. an electromagnetic valve; 10. a valve body; 11. a valve cavity; 111. an avoidance groove; 112. a step structure; 12. an assembly port; 13. an outer through hole; 131. a first through hole; 132. a second through hole; 14. a first channel; 15. a second channel; 16. a main body portion; 17. a tapered portion; 20. a valve core assembly; 21. a movable iron core; 211. a first accommodation hole; 212. a second accommodation hole; 22. a stationary core; 23. a seal; 24. a first elastic member; 25. a second elastic member; 30. a sleeve; 40. a first connection pipe; 50. and a second connection pipe.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present utility model for the purpose of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

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

The existing electromagnetic valve comprises a valve body and a valve core assembly, wherein a valve cavity, a vertical hole communicated with the valve cavity and a valve port are arranged in the valve body, and the valve core assembly can block or open the valve port so as to realize the communication or separation between the vertical hole and the valve port. However, when the existing electromagnetic valve is used for machining vertical holes, the machining tool is easy to deviate from the direction due to factors such as machining errors of operators, so that the machining tool can touch the inner wall of the valve cavity, damage to the inner wall of the valve cavity is caused, the forming rate of the valve body is reduced, and the machining cost of the electromagnetic valve is increased.

Referring to fig. 1, in order to solve the problem that the conventional solenoid valve interferes with the inner wall of the valve cavity when machining the vertical hole, the present utility model provides a solenoid valve 100.

As shown in fig. 2 and 3, the solenoid valve 100 provided by the present utility model includes a valve body 10 and a valve cartridge assembly 20. The valve body 10 is provided with a valve cavity 11 and an assembly port 12 communicated with the valve cavity 11, at least part of the valve core assembly 20 is arranged on the valve cavity 11 through the assembly port 12, and the bottom wall of the valve cavity 11 far away from the assembly port 12 is provided with an outer through hole 13 used for communicating the valve cavity 11 with an external connecting pipe. The side wall of the valve cavity 11, which is far away from one end of the assembly port 12, is provided with an avoidance groove 111. Along the direction of the valve cavity 11 from one end close to the assembly opening 12 to one end far away from the assembly opening 12, the side wall of the avoidance groove 111 extends towards the direction far away from the central axis of the valve cavity 11, a plane perpendicular to the central axis of the valve cavity 11 is defined as a projection plane, and along the central axis direction of the valve cavity 11, the projection of the side wall of the avoidance groove 111 on the projection plane and the projection of the opening of the outer through hole 13 communicating with the valve cavity 11 on the projection plane are not overlapped with each other.

It should be noted that, the communication between the outer through hole 13 and the external connection pipe may be direct communication, or may be indirect communication by providing a pipeline.

It should be further noted that, the projection of the side wall of the avoidance groove 111 on the projection plane and the projection of the opening of the outer through hole 13, which communicates with the valve cavity 11, on the projection plane are not overlapped with each other, which means that the minimum inner diameter of the side wall of the avoidance groove 111 and the projection of the hole wall of the outer through hole 13 on the projection plane do not have any overlapping part or are tangentially arranged.

It can be understood that the avoidance groove 111 is machined on the inner wall of the valve cavity 11, and the projection of the side wall of the avoidance groove 111 on the projection surface and the projection of the opening of the outer through hole 13, which is communicated with the valve cavity 11, on the projection surface are not overlapped, that is, a certain distance exists between the outer through hole 13 and the side wall of the avoidance groove 111, so that when an external tool stretches into the valve cavity 11 along the central axis direction of the valve cavity 11 to machine the outer through hole 13, even if the external tool deviates, the side wall of the avoidance groove 111, namely the inner wall of the valve cavity 11, is not contacted with a machining tool, and further the damage of the machining tool to the inner wall of the valve cavity 11 can be avoided, and the normal use of the electromagnetic valve 100 is ensured. In addition, the outer through hole 13 can be easily processed, and the processing efficiency of the outer through hole 13 can be improved. On the other hand, the provision of the relief groove 111 increases the internal volume of the valve chamber 11 to some extent, reducing the flow resistance of the fluid.

Specifically, along the central axis direction of the valve chamber 11, and along the direction from the outer through hole 13 to the fitting opening 12, the side wall of the avoiding groove 111 is gradually contracted and forms a tapered structure. In this way, the distance between the end of the avoiding groove 111 away from the assembly opening 12 and the outer through hole 13 is larger, so that damage to the structure of the electromagnetic valve 100 during processing of the outer through hole 13 can be further avoided. Moreover, the avoidance groove 111 formed in a tapered shape is easy to process, and the processing difficulty of the avoidance groove 111 can be reduced.

In an embodiment, the outer nipple comprises a first nipple 40 and a second nipple 50, the outer through hole 13 comprises a first through hole 131 and a second through hole 132, and the valve body 10 is further provided with a first channel 14 and a second channel 15. The first through hole 131 communicates at one end with the second through hole 132 through the valve chamber 11, and communicates at the other end with the first passage 14 and with the first adapter tube 40 through the first passage 14. The second through hole 132 communicates with the valve chamber 11 at one end and communicates with the second passage 15 at the other end and with the second adapter 50 through the second passage 15. The spool assembly 20 is movable toward and away from the first through hole 131 to communicate or block the first through hole 131 and the valve chamber 11. Wherein, the central axis of the first through hole 131 is coaxial with the central axis of the valve cavity 11, and the central axis of the second through hole 132 is parallel with the central axis of the valve cavity 11.

In this way, fluid can flow through the solenoid valve 100.

During operation of the solenoid valve 100, fluid enters the second passage 15 from the second connection pipe 50 and flows into the valve cavity 11 through the second through hole 132, and when the valve core assembly 20 is blocked at the opening of the first through hole 131, the solenoid valve 100 is in a closed state, and the fluid cannot continue to flow. When the valve core assembly 20 moves away from the first through hole 131, the valve cavity 11 is communicated with the connection port of the first through hole 131, the electromagnetic valve 100 is in an open state, and fluid in the valve cavity 11 can flow to the first channel 14 through the first through hole 131 and flow out of the electromagnetic valve 100 from the first connection pipe 40.

In one embodiment, as shown in FIG. 3, the valve body 10 includes a main body portion 16 and a tapered portion 17. The valve chamber 11 is provided in the main body 16, and one end of the tapered portion 17 is provided at one end of the valve chamber 11 away from the fitting opening 12 and connected to the main body 16, and the other end extends in a direction approaching the fitting opening 12. The first through hole 131 penetrates the tapered portion 17 in the central axis direction of the valve chamber 11, and the spool assembly 20 can be movably fitted with the tapered portion 17 to communicate or block the valve chamber 11 and the first through hole 131.

In this way, by providing the tapered portion 17 protruding from the inner wall of the valve cavity 11, the valve core assembly 20 can be better movably matched with the valve core assembly 20, so that the valve core assembly 20 is prevented from extending into the valve cavity 11 too much to prevent the flow of fluid.

Further, in an embodiment, the valve core assembly 20, the valve cavity 11, the main body portion 16, the tapered portion 17 and the first through hole 131 are all coaxially disposed. In this way, the space distribution of the valve chamber 11 on the peripheral side of the tapered portion 17 is relatively uniform, and the uniformity of the fluid flow can be improved. The valve element assembly 20 can be better matched with the conical portion 17, and the on-off of fluid in the electromagnetic valve 100 can be controlled.

In one embodiment, the cross-sectional area of the tapered portion 17 gradually decreases along the central axis direction of the valve chamber 11 from the direction away from the fitting opening 12 to the direction toward the fitting opening 12.

In this way, the internal volume of the valve chamber 11 can be increased while ensuring the structural strength of the tapered portion 17 itself, thereby reducing the flow resistance of the fluid.

Further, in an embodiment, as shown in fig. 4, along the central axis direction of the valve chamber 11, the projection of the second through hole 132 on the projection surface and the projection of the outer wall of the tapered portion 17 on the projection surface do not overlap each other.

In this way, when the second through hole 132 is processed, damage to the structure of the tapered portion 17 can be avoided, thereby improving the molding rate of the product.

In an embodiment, as shown in fig. 1 and 2, the electromagnetic valve 100 further includes a sleeve 30, the sleeve 30 is sleeved on the valve core assembly 20, one end of the sleeve 30 is inserted into the valve cavity 11 through the assembly port 12, and the sleeve 30 is detachably connected with the inner wall of the valve cavity 11.

Generally, the existing solenoid valve further comprises a valve cover, the sleeve is inserted into the valve cover and fixedly connected with the valve cover, the valve cover is connected to the valve body in a threaded mode and the like, and a sealing ring is further arranged at the joint of the valve cover and the valve body. Thus, not only are assembly steps more, but also the adopted parts are more, so that the production cost is increased. And, the valve gap leads to the volume of valve body great with the valve body between the connection, is unfavorable for the miniaturization of product.

The valve body 10 of the utility model is of an integrated structure and is directly connected with the sleeve 30, thus eliminating the valve cover in the prior art and saving the cost. In addition, the size of the valve body 10 can be reduced, and internal threads are not required to be machined in the valve body 10, so that the machining cost is further saved. On the other hand, the reduction of parts makes the assembly of the solenoid valve 100 simpler, and can effectively improve the assembly efficiency.

In other embodiments, the sleeve 30 and the inner wall of the valve cavity 11 may be further connected by welding, so that the processing is simpler, the installation efficiency of the sleeve 30 can be further improved, and better sealing performance is achieved.

Further, in one embodiment, as shown in fig. 3, the inner wall of the valve chamber 11 is provided with a step structure 112, and the step surface of the step structure 112 stops at one end of the sleeve 30 near the outer through hole 13.

Thus, the step structure 112 plays a role in positioning the sleeve 30, and the sleeve 30 can be rapidly positioned when being inserted into the valve cavity 11 through the assembly port 12, so that the installation efficiency of the sleeve 30 is greatly improved.

In one embodiment, as shown in FIG. 2, the valve core assembly 20 includes a moving core 21, a stationary core 22, and a seal 23. The static iron core 22 is fixedly connected to the sleeve 30, the movable iron core 21 is movably matched with the static iron core 22, the sealing piece 23 is connected to one end, far away from the static iron core 22, of the movable iron core 21, and the movable iron core 21 can drive the sealing piece 23 to move along the central axis direction of the valve cavity 11, so that the sealing piece 23 can open or close the first through hole 131.

In this way, the sealing member 23 can open and close the first through hole 131 under the movable fit of the movable iron core 21 and the static iron core 22, so as to realize the flow control of the fluid in the electromagnetic valve 100.

Specifically, the sealing member 23 may be made of a flexible material, so as to have a certain elastic deformation capability, and be capable of better sealing the first through hole 131, so as to avoid the occurrence of internal leakage of the electromagnetic valve 100.

Further, in one embodiment, the valve core assembly 20 further includes a first elastic member 24 and a second elastic member 25. The movable iron core 21 is provided with a first accommodating hole 211 and a second accommodating hole 212, the first elastic piece 24 is arranged in the first accommodating hole 211, and the movable iron core 21 is connected to the static iron core 22 through the first elastic piece 24, so that the first elastic piece 24 has a tendency of pushing the movable iron core 21 to move towards the position close to the outer through hole 13. The second elastic member 25 and the sealing member 23 are provided in the second accommodation hole 212, and the sealing member 23 is connected to the moving core 21 through the second elastic member 25 such that the second elastic member 25 has a tendency to push the sealing member 23 to move toward the vicinity of the outer through hole 13.

In this way, the movable iron core 21 is simple in structure, and the size of the movable iron core 21 can be reduced, so that the size of the sleeve 30 can be reduced, and the solenoid valve 100 can be further miniaturized.

When the electromagnetic valve 100 is energized, the stationary core 22 generates a magnetic field, the movable core 21 overcomes the elastic force of the first elastic member 24 by the magnetic force and is attracted to the stationary core 22, the movable core 21 moves toward the stationary core 22 and drives the sealing member 23 to separate from the tapered portion 17, and at this time, the valve cavity 11 is in a conductive state with the first through hole 131. When the electromagnetic valve 100 is powered off, the magnetic field of the static iron core 22 disappears, the movable iron core 21 is reset under the elastic force of the first elastic member 24, and the sealing member 23 is blocked in the first through hole 131. When the movable iron core 21 is reset, the conical part 17 can be abutted against the sealing element 23 and give a force to the sealing element 23, the second elastic element 25 is compressed under force, and a reaction force is given to the sealing element 23, so that the sealing element 23 and the conical part 17 are tightly attached.

Further, the valve core assembly 20 further includes a limiting member (not shown) disposed on a side of the sealing member 23 adjacent to the outer through hole 13 and connected to an inner wall of the second accommodating hole 212, so as to prevent the sealing member 23 from being separated from the second accommodating hole 212, thereby improving reliability of the overall structure of the solenoid valve 100.

The present utility model also provides an air conditioning system comprising the solenoid valve 100 according to any one of the above embodiments.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of the utility model should be determined from the following claims.

Claims (10)

1. A solenoid valve characterized by comprising a valve body (10) and a valve core assembly (20);

the valve body (10) is provided with a valve cavity (11) and an assembly port (12) communicated with the valve cavity (11), at least part of the valve core assembly (20) is arranged in the valve cavity (11) through the assembly port (12), and an outer through hole (13) used for communicating the valve cavity (11) and an external connecting pipe is formed in the bottom wall, far away from the assembly port (12), of the valve cavity (11);

the side wall of valve pocket (11) is kept away from assembly mouth (12) one end is equipped with dodges groove (111), follows valve pocket (11) are close to from the one end of assembly mouth (12) to keep away from the direction of one end of assembly mouth (12), dodge the lateral wall in groove (111) towards keeping away from valve pocket (11) central axis direction extension, define a perpendicular to the plane of valve pocket (11) central axis and be the projection face, follows the central axis direction of valve pocket (11), dodge the projection of lateral wall in groove (111) on the projection face with outer through-hole (13) intercommunication the opening of valve pocket (11) is on the projection face each other non-overlapping.

2. The electromagnetic valve according to claim 1, characterized in that the outer through hole (13) comprises a first through hole (131) and a second through hole (132), the valve body (10) is further provided with a first passage (14) and a second passage (15), one end of the first through hole (131) is communicated with the second through hole (132) through the valve cavity (11), and the other end is communicated with the first passage (14); one end of the second through hole (132) is communicated with the valve cavity (11), and the other end of the second through hole is communicated with the second channel (15);

the valve core assembly (20) can move towards a direction approaching or separating from the first through hole (131) so as to communicate or isolate the first through hole (131) and the valve cavity (11);

the central axis of the first through hole (131) is coaxial with the central axis of the valve cavity (11), and the central axis of the second through hole (132) is parallel to the central axis of the valve cavity (11).

3. The electromagnetic valve according to claim 2, characterized in that the valve body (10) includes a main body portion (16) and a tapered portion (17), the valve chamber (11) is provided in the main body portion (16), one end of the tapered portion (17) is provided at one end of the valve chamber (11) away from the fitting opening (12) and connected to the main body portion (16), and the other end extends in a direction approaching the fitting opening (12);

the first through hole (131) penetrates through the conical portion (17) along the central axis direction of the valve cavity (11), and the valve core assembly (20) can be in movable fit with the conical portion (17) so as to communicate or isolate the valve cavity (11) and the first through hole (131).

4. A solenoid valve according to claim 3, characterized in that the cross-sectional area of said conical portion (17) gradually decreases in the direction of the central axis of said valve chamber (11) and from the direction away from said fitting opening (12) to the direction closer to said fitting opening (12).

5. A solenoid valve according to claim 3, characterized in that the projection of the second through hole (132) onto the projection surface and the projection of the outer wall of the cone (17) onto the projection surface do not overlap each other along the central axis direction of the valve chamber (11).

6. The electromagnetic valve according to claim 2, further comprising a sleeve (30), wherein the sleeve (30) is sleeved on the valve core assembly (20), one end of the sleeve is inserted into the valve cavity (11) through the assembly port (12), and the sleeve (30) is detachably connected with the inner wall of the valve cavity (11).

7. The electromagnetic valve according to claim 6, characterized in that the inner wall of the valve chamber (11) is provided with a step structure (112), the step surface of the step structure (112) being stopped at the end of the sleeve (30) near the outer through hole (13).

8. The electromagnetic valve according to claim 6, characterized in that the valve core assembly (20) comprises a movable iron core (21), a static iron core (22) and a sealing element (23), the static iron core (22) is fixedly connected to the sleeve (30), the movable iron core (21) is movably matched with the static iron core (22), the sealing element (23) is connected to one end, far away from the static iron core (22), of the movable iron core (21), and the movable iron core (21) can drive the sealing element (23) to move along the central axis direction of the valve cavity (11), so that the sealing element (23) can open or close the first through hole (131).

9. The electromagnetic valve according to claim 8, characterized in that the spool assembly (20) further includes a first elastic member (24) and a second elastic member (25), the movable iron core (21) is provided with a first accommodation hole (211) and a second accommodation hole (212), the first elastic member (24) is provided in the first accommodation hole (211), and the movable iron core (21) is connected to the stationary iron core (22) through the first elastic member (24), so that the first elastic member (24) has a tendency to push the movable iron core (21) to move toward proximity to the outer through hole (13); the second elastic piece (25) and the sealing piece (23) are arranged in the second accommodating hole (212), and the sealing piece (23) is connected to the movable iron core (21) through the second elastic piece (25), so that the second elastic piece (25) has a tendency of pushing the sealing piece (23) to move towards the position close to the outer through hole (13).

10. An air conditioning system comprising a solenoid valve according to any one of claims 1 to 9.