WO2022188540A1

WO2022188540A1 - Electromagnetic valve and air conditioning system

Info

Publication number: WO2022188540A1
Application number: PCT/CN2022/071294
Authority: WO
Inventors: 冯忠波; 田鹏; 马小红
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2021-03-11
Filing date: 2022-01-11
Publication date: 2022-09-15
Also published as: CN214888901U; KR20230154269A; JP2024512248A

Abstract

Provided are an electromagnetic valve (100) and an air conditioning system. The electromagnetic valve (100) comprises a valve body (110) and core iron (120), wherein the valve body (110) is provided with a valve cavity, and an inlet (1101) and an outlet (1102) which are in communication with the valve cavity; and the core iron (120) is provided with a channel (1201), one end of the channel (1201) is in communication with the valve cavity and the other end of the channel is sealed by a sealing member (121), and the outlet (1102) can be sealed by the core iron (120), by means of the sealing member (121), in a resettable manner. The electromagnetic valve (100) is provided with a first throttling hole (131) and/or a second throttling hole (132); the first throttling hole (131) is provided in the sealing member (121), and when the outlet (1102) is sealed by the core iron, one end of the first throttling hole (131) is in communication with the outlet (1102), and the other end of the first throttling hole is in communication with the valve cavity by means of the channel (1201); and the second throttling hole (132) is provided in the valve body (110) and is in communication with the valve cavity and the outlet (1102). By using the electromagnetic valve (100) in the air conditioning system, there is no need to arrange a capillary tube and an electromagnetic valve which are connected in parallel, such that the cost can be reduced, and the structure is simplified.

Description

Solenoid valve and air conditioning system

CROSS-REFERENCE TO RELATED APPLICATIONS

The present disclosure claims priority based on Chinese Application No. 202120531796.9 filed on March 11, 2021, “Solenoid Valve and Air Conditioning System”, the entire contents of which are incorporated herein by reference.

technical field

The present disclosure relates to the technical field of air conditioning systems and accessories thereof, and in particular, to a solenoid valve and an air conditioning system.

Background technique

In the existing air conditioning system, the compressor discharges refrigerant and lubricating oil. After being separated by an oil separator, the separated lubricating oil is returned to the suction port of the compressor through a parallel capillary tube and a solenoid valve. When the compressor discharges a lot of lubricating oil, the solenoid valve opens to ensure that the lubricating oil returns to the compressor in time to prevent the compressor from being damaged due to lack of oil. However, the air-conditioning system adopts the above-mentioned existing solution, because the compressor oil return pipeline needs to be provided with a parallel capillary tube and a solenoid valve, which has the defects of high cost and complicated structure.

SUMMARY OF THE INVENTION

One aspect of the embodiments of the present disclosure provides a solenoid valve; wherein the solenoid valve includes a valve body and a core iron; the valve body has a valve cavity and an inlet and an outlet communicated with the valve cavity; the core iron A channel is provided, one end of the channel is communicated with the valve cavity, and the other end is closed by a sealing member, and a reset member is connected between the channel and the valve body, so that the core iron can pass through the valve body in a resettable manner. A seal is closed at the outlet; wherein, the solenoid valve has a first orifice and/or a second orifice; the first orifice is arranged on the seal, and the core iron is closed at the When the outlet is opened, one end of the first orifice is communicated with the outlet, and the other end is communicated with the valve cavity through the passage; the second orifice is arranged on the valve body and communicated with the valve body. valve cavity and the outlet.

In another aspect of the embodiments of the present disclosure, an air conditioning system is provided, which includes a compressor and an oil separator, the compressor has an oil discharge port and an oil suction port, and the oil separator has an oil inlet and an oil outlet, The oil outlet is communicated with the oil inlet; wherein, the air conditioning system further includes the solenoid valve proposed in the present disclosure and described in the above embodiments, and the inlet of the solenoid valve is communicated with the oil outlet , the outlet of the solenoid valve is communicated with the suction port.

Description of drawings

1 is a cross-sectional view of a solenoid valve according to an exemplary embodiment;

Fig. 2 is the enlarged view of A part shown in Fig. 1;

3 is a cross-sectional view of a solenoid valve according to another exemplary embodiment;

Fig. 4 is an enlarged view of part B shown in Fig. 3;

Fig. 5 is a partial enlarged view of a solenoid valve according to another exemplary embodiment;

FIG. 6 is a partial enlarged view of a solenoid valve according to another exemplary embodiment;

FIG. 7 is a partial system schematic diagram of an air conditioning system according to an exemplary embodiment.

specific embodiment

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed descriptions will be omitted.

Referring to FIG. 1 , a cross-sectional view of the solenoid valve proposed by the present disclosure is representatively shown. In this exemplary embodiment, the solenoid valve proposed by the present disclosure is illustrated by taking the compressor return scheme applied to the air conditioning system as an example. It will be easily understood by those skilled in the art that, in order to apply the related designs of the present disclosure to other types of air conditioning systems or other equipment, various modifications, additions, substitutions, deletions or other modifications may be made to the following specific embodiments. variations, which are still within the scope of the principles of the solenoid valve presented in this disclosure.

As shown in FIG. 1 , in this embodiment, the solenoid valve proposed by the present disclosure includes a valve body 110 and a core iron 120 . Referring to FIG. 2 in conjunction, an enlarged view of the portion A shown in FIG. 1 is representatively shown in FIG. 2 . The structure, connection manner and functional relationship of the main components of the solenoid valve proposed in the present disclosure will be described in detail below with reference to the above drawings.

As shown in FIG. 1 and FIG. 2 , in this embodiment, the valve body 110 has a valve chamber, an inlet 1101 and an outlet 1102 , and the inlet 1101 and the outlet 1102 are respectively communicated with the valve chamber. The core iron 120 is provided with a channel 1201 , one end of the channel 1201 is connected to the valve cavity, and the other end of the channel 1201 is closed by a sealing member 121 . A reset piece 122 is connected between the passage 1201 and the valve body 110 , and the reset piece 122 is used to make the core iron 120 resettable and closed to the outlet 1102 through the seal piece 121 . On this basis, the solenoid valve has a first orifice 131 . The first orifice 131 is disposed on the sealing member 121 . When the core iron 120 is closed at the outlet 1102 , one end of the first orifice 131 is connected to the outlet 1102 , and the other end of the first orifice 131 is communicated with the valve through the passage 1201 . cavity, so that the solenoid valve still has a certain flow when the core iron 120 is closed. Accordingly, when the solenoid valve is used in the compressor oil return scheme of the air conditioning system, the refrigerant discharged from the compressor and the lubricating oil separated by the oil separator can be returned to the suction port of the compressor by the solenoid valve. . During normal operation, the lubricating oil flows back to the compressor through the solenoid valve orifice. When the compressor discharges a lot of lubricating oil, the solenoid valve opens to ensure that the lubricating oil returns to the compressor in time. Through the above-mentioned structural design, the air-conditioning system utilizes the solenoid valve proposed in the present disclosure, eliminating the need for parallel capillary tubes and solenoid valves, which can greatly reduce equipment costs and simplify the system structure at the same time.

Optionally, as shown in FIG. 1 and FIG. 2 , in this embodiment, the solenoid valve includes a first throttle hole 131 , the first throttle hole 131 is arranged at the center of the sealing member 121 , and the first throttle hole 131 is The hole 131 extends along the centerline of the channel 1201 . Accordingly, the present disclosure can ensure that the lubricating oil flows to the outlet 1102 via the passage 1201 and the first orifice 131 .

Optionally, as shown in FIG. 1 and FIG. 2 , in this embodiment, the sealing member 121 may have a substantially columnar structure, that is, the cross section of the sealing member 121 may be substantially rectangular. On this basis, the sealing member 121 may be disposed on the core iron 120 in a central manner, that is, the centerline of the sealing member 121 may substantially coincide with the centerline of the channel 1201 . Accordingly, when the first throttle hole 131 extends along the centerline direction of the passage 1201 , it also generally extends along the centerline direction of the sealing member 121 .

Optionally, as shown in FIGS. 1 and 2 , in this embodiment, the valve body 110 may include a conduit portion 111 and a body portion 112 . Specifically, the conduit portion 111 can be seen to have a substantially cylindrical structure, one end of the conduit portion 111 is closed, and the core iron 120 is disposed in the cylindrical cavity 1111 of the conduit portion 111 between the core iron 120 and the cylindrical wall of the conduit portion 111 . With gap G. The body portion 112 is disposed at the other end of the tube portion of the conduit portion 111, and the body portion 112 has an inner cavity 1121. The inner cavity 1121 communicates with the cylindrical cavity 1111 of the conduit portion 111, thereby jointly defining the valve cavity of the solenoid valve. On this basis , the inlet 1101 and the outlet 1102 of the solenoid valve can be respectively disposed in the body portion 112 .

Further, as shown in FIG. 1 , based on the structural design that the valve body 110 includes the conduit portion 111 having a cylindrical structure and one end of the cylindrical opening is closed, in this embodiment, an attractor component 113 may be provided in the cylindrical cavity 1111 of the conduit portion 111 . , the attractor component 113 closes one end of the tube opening of the conduit portion 111 . On this basis, the reset member 122 can be connected between the attractor part 113 and the channel 1201 of the core iron 120 .

Further, as shown in FIG. 1 , based on the structural design that the attractor part 113 is provided in the cylindrical cavity 1111 of the catheter part 111 , in this embodiment, a stepped structure 1202 may be provided in the channel 1201 , and one end of the reset part 122 is connected to On the stepped surface of the stepped structure 1202 , the other end of the reset member 122 extends out of the channel 1201 and is connected to the attractor member 113 .

Optionally, as shown in FIG. 1 , in this embodiment, the restoring member 122 may include a restoring spring.

Optionally, as shown in FIG. 2 , in this embodiment, the core iron 120 may be provided with a balance hole 1202 , the balance hole 1202 generally extends along the radial direction of the core iron 120 , and the channel between the balance hole 1202 and the core iron 120 1201 Connected.

Based on the above detailed description of the first embodiment of the solenoid valve proposed in the present disclosure, the working principle of the solenoid valve in the first embodiment will be briefly described below.

When the core iron 120 is closed, that is, when the core iron 120 is closed to the outlet 1102 of the solenoid valve through the seal 121, the lubricating oil separated by the separator can still pass through the “inlet 1101→valve cavity (inner cavity 1121→balance hole 1202→ The path of cylinder cavity 1111)→channel 1201→first orifice 131→outlet 1102" flows through the solenoid valve, so that the solenoid valve has a certain flow rate in the closed state.

When more lubricating oil is separated by the separator, the solenoid valve is opened, the core iron 120 is opened, that is, the core iron 120 is separated from the outlet 1102, and the lubricating oil can pass through the path of "inlet 1101→valve cavity (inner cavity 1121)→outlet 1102" Flowing through the solenoid valve, of course, can also flow through the solenoid valve through the path of "inlet 1101 → valve cavity (inner cavity 1121 → cylinder cavity 1111) → channel 1201 → first throttle hole 131 → outlet 1102", so as to meet the needs of larger flow of traffic.

Solenoid valve embodiment two

Based on the above detailed description of the first embodiment of the solenoid valve proposed by the present disclosure, the second embodiment of the solenoid valve proposed by the present disclosure will be described below with reference to FIG. 3 and FIG. 4 . In the second embodiment, the solenoid valve proposed by the present disclosure adopts substantially the same structural design as that of the above-mentioned first embodiment, and the main differences of the solenoid valve in the second embodiment will be described below.

As shown in FIG. 3 , which representatively shows a cross-sectional view of the solenoid valve proposed by the present disclosure in the second embodiment, and FIG. 4 representatively shows an enlarged view of part B shown in FIG. 3 .

As shown in FIGS. 3 and 4 , in this embodiment, the sealing member 121 has a substantially spherical structure. On this basis, the solenoid valve proposed in the present disclosure has the second orifice 132 and does not have the first orifice 131 . Specifically, the second orifice 132 is disposed in the valve body 110 , and the second orifice 132 communicates with the valve cavity and the outlet 1102 . Accordingly, since the sealing member 121 having a spherical structure is likely to rotate during the operation of the core iron 120 , the first orifice 131 is no longer provided on the sealing member 121 , which can prevent the first orifice 131 from being damaged by the sealing member 121 . Rotation makes it impossible to communicate the channel 1201 and the outlet 1102 . Disposing the second orifice 132 on the valve body 110 can directly communicate the valve cavity with the outlet 1102, and can also ensure that the solenoid valve proposed in the present disclosure still has a certain flow rate in a closed state.

Optionally, as shown in FIGS. 3 and 4 , in this embodiment, the valve body 110 may have a body portion 112 , the inner cavity 1121 of the body portion 112 defines a part of the valve cavity, and the inlet 1101 and the outlet of the solenoid valve 1102 are respectively disposed on the body portion 112 . On this basis, the second orifice 132 may be disposed in the body portion 112 , and the second orifice 132 is communicated with the inner cavity 1121 and the outlet 1102 .

It should be noted that, in other embodiments, when only the second throttle hole 132 is provided in the solenoid valve proposed in the present disclosure, the sealing member 121 of the solenoid valve may also have other structures, such as the same as the solenoid valve in the first embodiment. The structure of the sealing member 121 is the same, and is not limited to this embodiment.

Based on the above detailed description of the second embodiment of the solenoid valve proposed in the present disclosure, the working principle of the solenoid valve in the second embodiment will be briefly described below.

When the core iron 120 is closed, that is, when the core iron 120 is closed to the outlet 1102 of the solenoid valve through the sealing member 121, the lubricating oil separated by the separator can still pass through “inlet 1101 → valve cavity (inner cavity 1121) → the second section The path of flow hole 132→outlet 1102" flows through the solenoid valve, so that the solenoid valve has a certain flow rate in the closed state.

When more lubricating oil is separated by the separator, the solenoid valve is opened, the core iron 120 is opened, that is, the core iron 120 is separated from the outlet 1102, and the lubricating oil can pass through the path of "inlet 1101→valve cavity (inner cavity 1121)→outlet 1102" Flowing through the solenoid valve, of course, can also flow through the solenoid valve through the path of "inlet 1101→valve cavity (inner cavity 1121)→second orifice 132→outlet 1102", so as to meet the flow of larger flow.

Solenoid valve embodiment three

Based on the above-mentioned detailed description of the first and second embodiments of the solenoid valve proposed by the present disclosure, the third embodiment of the solenoid valve proposed by the present disclosure will be described below with reference to FIG. 5 . In the third embodiment, the solenoid valve proposed by the present disclosure adopts substantially the same structural design as the above-mentioned first and second embodiments, and the main differences of the solenoid valve in the third embodiment will be described below.

As shown in FIG. 5 , it representatively shows a partial enlarged view of the solenoid valve proposed in the present disclosure in the third embodiment, according to which reference can be made to FIG. 2 corresponding to the enlarged area of part A in FIG. 1 .

As shown in FIG. 5 , in this embodiment, the solenoid valve proposed by the present disclosure has a first orifice 131 and a second orifice 132 . Specifically, the first orifice 131 is disposed on the sealing member 121 , and the first orifice 131 communicates with the passage 1201 and the outlet 1102 . The second orifice 132 is disposed on the valve body 110 , and the second orifice 132 communicates with the valve cavity and the outlet 1102 . Through the above structural design, the solenoid valve proposed in the present disclosure utilizes the first orifice 131 and the second orifice 132 to still have a certain flow rate when the solenoid valve is closed.

Based on the above-mentioned detailed description of the third embodiment of the solenoid valve proposed by the present disclosure, the working principle of the solenoid valve in the third embodiment will be briefly described below.

When the core iron 120 is closed, that is, when the core iron 120 is closed to the outlet 1102 of the solenoid valve through the seal 121, the lubricating oil separated by the separator can still pass through the “inlet 1101→valve cavity (inner cavity 1121→balance hole 1202→ The paths of cylinder cavity 1111)→channel 1201→first orifice 131→outlet 1102" and "inlet 1101→valve cavity (inner cavity 1121)→second orifice 132→outlet 1102" flow through the solenoid valve, so that The solenoid valve has a certain flow in the closed state.

When more lubricating oil is separated by the separator, the solenoid valve is opened, the core iron 120 is opened, that is, the core iron 120 is separated from the outlet 1102, and the lubricating oil can pass through the path of "inlet 1101→valve cavity (inner cavity 1121)→outlet 1102" Flow through the solenoid valve, of course, can also pass through "inlet 1101 → valve cavity (inner cavity 1121 → cylinder cavity 1111) → channel 1201 → first throttle hole 131 → outlet 1102" and "inlet 1101 → valve cavity (inner cavity 1121)" )→the second orifice 132→the outlet 1102”, the path flows through the solenoid valve, so as to satisfy the circulation of larger flow.

Solenoid valve embodiment four

Based on the above detailed description of the third embodiment of the solenoid valve proposed by the present disclosure, the fourth embodiment of the solenoid valve proposed by the present disclosure will be described below with reference to FIG. 6 . In the fourth embodiment, the solenoid valve proposed by the present disclosure adopts substantially the same structural design as that of the third embodiment. The main differences of the solenoid valve in the fourth embodiment will be described below.

As shown in FIG. 6 , it representatively shows a partial enlarged view of the solenoid valve proposed by the present disclosure in the fourth embodiment, according to which reference can be made to FIG. 2 corresponding to the enlarged area of part A in FIG. 1 .

As shown in FIG. 6 , in this embodiment, the solenoid valve proposed in the present disclosure has three first orifices 131 and two second orifices 132 . Specifically, the three first orifices 131 are disposed on the sealing member 121 and arranged at intervals, and the first orifices 131 communicate with the passage 1201 and the outlet 1102 . The two second orifices 132 are disposed on the valve body 110 and arranged at intervals, and the second orifices 132 communicate with the valve cavity and the outlet 1102 . Through the above-mentioned structural design, the solenoid valve proposed in the present disclosure utilizes three first orifices 131 and two second orifices 132, and can still have a certain flow rate when the solenoid valve is closed.

It should be noted that, in other embodiments, when the solenoid valve proposed in the present disclosure only has the first orifice 131 , the number of the first orifice 131 may be one or more than two. When the solenoid valve proposed in the present disclosure only has the second orifice 132 , the number of the second orifice 132 may be one or more than two. When the solenoid valve proposed in the present disclosure has both the first orifice 131 and the second orifice 132 , the number of the first orifice 131 may be one or more than two, and the number of the second orifice 132 may be one or more. The number may be one or two or more. In addition, when the solenoid valve has both the first orifice 131 and the second orifice 132, the number of the first orifice 131 and the number of the second orifice 132 may be, but not limited to, the same.

It should be noted here that the solenoid valves shown in the drawings and described in this specification are but a few examples of the many types of solenoid valves that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are in no way limited to any detail or any component of the solenoid valve illustrated in the drawings or described in this specification.

To sum up, in the solenoid valve proposed in the present disclosure, by setting the first orifice and/or the second orifice, the solenoid valve still has a certain flow rate when the core iron closes the outlet. Accordingly, the refrigerant discharged from the compressor and the lubricating oil separated by the oil separator can be returned to the suction port of the compressor by the solenoid valve. During normal operation, the lubricating oil flows back to the compressor through the solenoid valve orifice. When the compressor discharges a lot of lubricating oil, the solenoid valve opens to ensure that the lubricating oil returns to the compressor in time. Through the above-mentioned structural design, the air-conditioning system utilizes the solenoid valve proposed in the present disclosure, eliminating the need for parallel capillary tubes and solenoid valves, which can greatly reduce equipment costs and simplify the system structure at the same time.

Based on the above detailed description of several exemplary embodiments of the solenoid valve proposed by the present disclosure, an exemplary embodiment of the air conditioning system proposed by the present disclosure will be described below with reference to FIG. 7 .

Referring to FIG. 7 , it representatively shows a partial system schematic diagram of the air conditioning system proposed by the present disclosure, and specifically shows the compressor oil return part of the air conditioning system. In this exemplary embodiment, the air-conditioning system proposed by the present disclosure is described by taking the design including the compressor oil return as an example. It will be easily understood by those skilled in the art that, in order to apply the related designs of the present disclosure to other types of air conditioning systems or other processes, various modifications, additions, substitutions, deletions or other modifications may be made to the following specific embodiments. variations, which are still within the scope of the principles of the air conditioning system presented in this disclosure.

As shown in FIG. 7 , in this embodiment, the air conditioning system proposed by the present disclosure includes a compressor 200 and an oil separator 300 . Specifically, the compressor 200 has an oil discharge port and an air suction port, the oil separator 300 has an oil inlet port and an oil outlet port, and the oil discharge port is communicated with the oil inlet port. On this basis, the air conditioning system further includes the solenoid valve 100 proposed in the present disclosure and described in detail in the above embodiments, the inlet of the solenoid valve 100 is communicated with the oil outlet through the first pipeline 410 , and the outlet of the solenoid valve 100 is communicated with the oil outlet through the first pipeline 410 . The second pipeline 420 is communicated with the suction port. Accordingly, by using the solenoid valve 100 proposed in the present disclosure, during normal operation, the lubricating oil flows back to the compressor 200 through the throttle hole of the solenoid valve 100, and when the compressor 200 discharges a lot of lubricating oil, the solenoid valve 100 is opened to ensure that the The lubricating oil returns to the compressor 200 in time. Through the above structural design, the air conditioning system proposed in the present disclosure does not need to provide parallel capillary tubes and the solenoid valve 100 , which can greatly reduce equipment costs, simplify system piping, and protect the solenoid valve 100 and the air conditioning system.

It should be noted here that the air conditioning systems shown in the drawings and described in this specification are but a few examples of the many types of air conditioning systems that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any detail or any component of the air conditioning system illustrated in the drawings or described in this specification.

To sum up, in the air conditioning system proposed in the present disclosure, by using the solenoid valve proposed in the present disclosure, during normal operation, the lubricating oil flows back to the compressor through the solenoid valve orifice, and when the compressor discharges a lot of lubricating oil, the solenoid valve Open to ensure timely return of lubricating oil to the compressor. Through the above structural design, the air conditioning system proposed in the present disclosure does not need to be provided with parallel capillary tubes and solenoid valves, which can greatly reduce equipment costs and simplify the system structure.

While the present disclosure has been described with reference to several exemplary embodiments, it is to be understood that the terms used are of description and illustration, and not of limitation. Since the present disclosure can be embodied in various forms without departing from the spirit or spirit of the disclosure, it is to be understood that the above-described embodiments are not limited to any of the foregoing details, but are to be construed broadly within the spirit and scope defined by the appended claims Therefore, all changes and modifications that come within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

A solenoid valve, wherein:

The solenoid valve includes a valve body and a core iron;

The valve body has a valve cavity and an inlet and an outlet communicated with the valve cavity;

The core iron is provided with a channel, one end of the channel is communicated with the valve cavity, and the other end is closed by a sealing member, and a reset member is connected between the channel and the valve body, so that the core iron can be reset is closed at the outlet by the seal;

Wherein, the solenoid valve has a first orifice and/or a second orifice;

The first orifice is arranged on the seal, and when the core iron is closed at the outlet, one end of the first orifice is communicated with the outlet, and the other end is communicated with the valve through the passage. cavity;

The second orifice is arranged on the valve body and communicated with the valve cavity and the outlet.
The solenoid valve of claim 1, wherein:

The solenoid valve includes one of the first orifice, the first orifice is disposed at the center of the seal, and the first orifice extends along the direction of the center line of the passage.
The solenoid valve of claim 1, wherein:

The solenoid valve includes at least two of the first throttle holes, and the at least two first throttle holes respectively extend along the direction of the center line of the passage and are arranged at intervals.
The solenoid valve of claim 1, wherein:

the valve body has a body part, the inner cavity of the body part defines a part of the valve cavity, the inlet and the outlet are respectively arranged on the body part;

Wherein, the second orifice is disposed on the body portion, and the second orifice is communicated with the inner cavity and the outlet.
The solenoid valve of claim 1, wherein:

The solenoid valve includes at least two of the second orifices, and the at least two second orifices are spaced apart.
The solenoid valve of claim 1, wherein:

The core iron has a spherical structure, and the solenoid valve only has the second orifice.
The solenoid valve of claim 1, wherein:

The valve body includes a conduit part and a body part;

The conduit portion is in a cylindrical structure, one end of the conduit portion is closed with a cylindrical opening, and the core iron is arranged in the cylindrical cavity of the conduit portion and has a gap with the cylindrical wall;

The main body part is arranged at the other end of the tube opening of the conduit part, the inner cavity of the main body part communicates with the tube cavity of the conduit part to define the valve cavity, and the inlet and the outlet are respectively arranged at the valve cavity. the body part.
The solenoid valve of claim 7, wherein:

An attractor part is arranged in the cylindrical cavity of the duct part, the attractor part closes one cylinder opening of the duct part, and the reset part is connected between the attractor part and the channel of the core iron .
The solenoid valve of claim 8, wherein:

A stepped structure is arranged in the channel, one end of the reset member is connected to the stepped surface of the stepped structure, and the other end extends out of the channel and is connected to the attractor component.
An air conditioning system includes a compressor and an oil separator, the compressor has an oil discharge port and a suction port, the oil separator has an oil inlet and an oil outlet, and the oil discharge port is communicated with the inlet port. port, where:

The air conditioning system further includes the solenoid valve according to any one of claims 1 to 9, wherein the inlet of the solenoid valve is communicated with the oil outlet, and the outlet of the solenoid valve is communicated with the air inlet.