Solenoid valves and air conditioning systems

Abstract

The present invention provides a solenoid valve (100) and an air conditioning system, the solenoid valve (100) including a valve body (110) and a core (120). The valve body (110) has a valve chamber, and an inlet (1101) and an outlet (1102) communicating with the valve chamber. The core (120) is provided with a passage (1201). One end of the passage (1201) communicates with the valve chamber and the other end is closed by a sealing member (121). The core (120) is reversibly connected to the outlet (110) by the sealing member (121). 2), the solenoid valve (100) has a first orifice (131) and / or a second orifice (132), the first orifice (131) is provided in the sealing member (121), one end of the first orifice (131) is connected to the outlet (1102) and the other end is connected to the valve chamber through a passage (1201), and the second orifice (132) is provided in the valve body (110) and is connected to the valve chamber and the outlet (1102). The air conditioning system uses the solenoid valve (100), so there is no need to provide a capillary tube and a solenoid valve in parallel, which reduces equipment costs and simplifies the structure.

Description

[Technical field]

[0001] Related Applications This disclosure claims priority to Chinese application “Solenoid Valve and Air Conditioning System” with Application No. 202120531796.9 filed on March 11, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of air conditioning systems and their accessories, and in particular to solenoid valves and air conditioning systems. [Background technology]

[0003] In a conventional air conditioning system, the compressor discharges refrigerant and lubricating oil, which are separated by an oil separator, and the separated lubricating oil is backflowed to the air intake of the compressor by a parallel capillary tube and a solenoid valve. When the compressor discharges a large amount of lubricating oil, the solenoid valve is opened to ensure that the lubricating oil is backflowed to the compressor in a timely manner, thereby preventing the compressor from being damaged due to lack of oil. However, if the air conditioning system adopts the above conventional configuration, it is necessary to provide a parallel capillary tube and solenoid valve in the oil return pipe of the compressor, which has the disadvantages of high cost and complex structure. Summary of the Invention

[0004] One aspect of an embodiment of the present disclosure provides an electromagnetic valve including a valve body and a core, the valve body having a valve chamber and an inlet and an outlet connected to the valve chamber, a passage provided in the core, one end of the passage connected to the valve chamber and the other end closed by a sealing member, and a reset member connected between the passage and the valve body for resettably closing the core at the outlet by the sealing member, the electromagnetic valve having a first orifice and / or a second orifice, the first orifice provided in the sealing member, when the core is closed at the outlet, one end of the first orifice connected to the outlet and the other end connected to the valve chamber by the passage, and the second orifice provided in the valve body and connected to the valve chamber and the outlet.

[0005] Another aspect of an embodiment of the present disclosure provides an air conditioning system including a compressor and an oil separator, the compressor having an oil discharge port and an air intake port, the oil separator having an oil inlet and an oil outlet port, the oil discharge port being connected to the oil inlet port, and further including a solenoid valve as proposed in the present disclosure and described in the above embodiment, the solenoid valve having an inlet port connected to the oil outlet port and the solenoid valve having an outlet port connected to the air intake port. [Brief description of the drawings]

[0006] [Figure 1] 1 is a cross-sectional view of a solenoid valve according to an exemplary embodiment. [Diagram 2] FIG. 2 is an enlarged view of part A shown in FIG. [Diagram 3] FIG. 13 is a cross-sectional view of a solenoid valve according to another exemplary embodiment. [Figure 4] FIG. 4 is an enlarged view of part B shown in FIG. [Diagram 5] FIG. 4 is a partial enlarged view of a solenoid valve according to another exemplary embodiment. [Figure 6] FIG. 4 is a partial enlarged view of a solenoid valve according to another exemplary embodiment. [Figure 7] FIG. 1 is a subsystem schematic diagram of an air conditioning system according to an exemplary embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Next, the exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments can be implemented in various forms, and should not be construed as being limited to the embodiments described herein, but rather the disclosure of these embodiments will be comprehensive and complete, and will comprehensively convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings indicate the same or similar configurations, and therefore detailed descriptions thereof will be omitted.

[0008] Referring to Fig. 1, a cross-sectional view of the solenoid valve proposed in the present disclosure is representatively shown. In this exemplary embodiment, the solenoid valve proposed in the present disclosure is described as an example of a backflow type of a compressor applied to an air conditioning system. Those skilled in the art can easily understand that even if various modifications, additions, substitutions, deletions, or other changes are made to the specific embodiments below in order to apply the relevant design of the present disclosure to other types of air conditioning systems or other equipment, these modifications are still within the scope of the principle of the solenoid valve proposed in the present disclosure.

[0009] As shown in Fig. 1, in this embodiment, the solenoid valve proposed in the present disclosure includes a valve body 110 and a core metal 120. Referring to Fig. 2, Fig. 2 representatively shows an enlarged view of part A shown in Fig. 1. Hereinafter, the structure, connection method, and functional relationship of each main component part of the solenoid valve proposed in the present disclosure will be described in detail with reference to the above drawings.

[0010] 1 and 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 each connected to the valve chamber. A passage 1201 is provided in the core metal 120, one end of the passage 1201 is connected to the valve chamber, and the other end of the passage 1201 is closed by a sealing member 121. A reset member 122 is connected between the passage 1201 and the valve body 110 for resettling the core metal 120 at the outlet 1102 by the sealing member 121. Based on this, the solenoid valve has a first orifice 131. The first orifice 131 is provided in the sealing member 121, and when the core 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 connected to the valve chamber by the passage 1201, so that the solenoid valve has a certain flow rate even when the core 120 is closed. According to this, when the solenoid valve is applied to the oil return mode of the compressor of the air conditioning system, the refrigerant and lubricant discharged from the compressor can be reversed to the air intake of the compressor by the solenoid valve after being separated by the oil separator. During normal operation, the lubricant is reversed to the compressor by the orifice of the solenoid valve, and when the lubricant discharged from the compressor is large, the solenoid valve is opened to ensure that the lubricant is reversed to the compressor in a timely manner. With the above structural design, the air conditioning system does not need to provide a parallel capillary tube and solenoid valve by using the solenoid valve proposed in this disclosure, and can greatly reduce the equipment cost and simplify the system structure at the same time.

[0011] Optionally, as shown in Figures 1 and 2, in this embodiment, the solenoid valve includes one first orifice 131 provided at the center position of the sealing member 121 and extending in the center line direction of the passage 1201. Thus, the present disclosure can ensure that the lubricant flows to the outlet 1102 via the passage 1201 and the first orifice 131.

[0012] Optionally, as shown in Figures 1 and 2, in this embodiment, the sealing member 121 may have a substantially columnar structure, i.e., the cross section of the sealing member 121 may be substantially rectangular. Based on this, the sealing member 121 may be provided on the core bar 120 so as to be located in the middle, i.e., the center line of the sealing member 121 may be substantially coincident with the center line of the passage 1201. According to this, when the first orifice 131 extends in the direction of the center line of the passage 1201, it also extends in the direction of the center line of the sealing member 121.

[0013] Optionally, as shown in Figures 1 and 2, in this embodiment, the valve body 110 may include a duct portion 111 and a main body portion 112. Specifically, the duct portion 111 may have a substantially cylindrical structure, a cylindrical opening at one end of the duct portion 111 is closed, a core bar 120 is provided in a cylindrical chamber 1111 of the duct portion 111, and a gap G is provided between the core bar 120 and a cylindrical wall of the duct portion 111. The main body portion 112 is provided at a cylindrical opening at the other end of the duct portion 111, and the main body portion 112 has an internal cavity 1121, which is connected to the cylindrical chamber 1111 of the duct portion 111, thereby defining a valve chamber of the solenoid valve together, and based on this, an inlet 1101 and an outlet 1102 of the solenoid valve may be provided in the main body portion 112, respectively.

[0014] 1, based on the structural design in which the valve body 110 has a cylindrical structure including the duct portion 111 and has a cylindrical opening at one end closed, in this embodiment, a suction member 113 that closes the cylindrical opening at one end of the duct portion 111 may be provided in a cylindrical chamber 1111 of the duct portion 111. Based on this, the return member 122 may be connected between the suction member 113 and the passage 1201 of the core metal 120.

[0015] Furthermore, based on the structural design in which the suction member 113 is provided in the cylindrical chamber 1111 of the duct portion 111 as shown in FIG. 1, in this embodiment, a step structure 1202 is provided in the passage 1201, one end of the return member 122 is connected to the step surface of the step structure 1202, and the other end of the return member 122 protrudes from the passage 1201 and is connected to the suction member 113.

[0016] Optionally, as shown in FIG. 1, in this embodiment, the return member 122 may include a return spring.

[0017] Optionally, as shown in FIG. 2, in this embodiment, the core bar 120 may be provided with balancing holes 1202 that extend substantially in the radial direction of the core bar 120 and communicate with the passages 1201 of the core bar 120 .

[0018] Based on the detailed description of the first embodiment of the solenoid valve proposed in the present disclosure above, the operating principle of the solenoid valve in the first embodiment will be briefly described below.

[0019] When the core 120 is closed, i.e., when the core 120 is closed at the outlet 1102 of the solenoid valve by the sealing member 121, the lubricating oil separated by the oil separator can still flow through the solenoid valve via the path "inlet 1101 → valve chamber (internal cavity 1121 → balancing hole 1202 → cylinder chamber 1111) → passage 1201 → first orifice 131 → outlet 1102", so that the solenoid valve has a constant flow rate in the closed state.

[0020] When a large amount of lubricating oil is separated by the oil separator, the solenoid valve is opened and the core 120 is opened, that is, the core 120 is detached from the outlet 1102, and the lubricating oil can flow through the solenoid valve via the path of "inlet 1101 → valve chamber (internal cavity 1121) → outlet 1102". Naturally, at the same time, the lubricating oil can also flow through the solenoid valve via the path of "inlet 1101 → valve chamber (internal cavity 1121 → cylinder chamber 1111) → passage 1201 → first orifice 131 → outlet 1102", thereby satisfying the flow of a high flow rate.

[0021] Solenoid valve embodiment 2 Based on the detailed description of the first embodiment of the solenoid valve proposed in the present disclosure above, a second embodiment of the solenoid valve proposed in the present disclosure will be described below with reference to Figures 3 and 4. In the second embodiment, the solenoid valve proposed in the present disclosure adopts a structural design that is almost the same as that of the first embodiment above, and the main differences of the solenoid valve in the second embodiment will be described below.

[0022] FIG. 3 representatively shows a cross-sectional view of a solenoid valve in a second embodiment proposed in the present disclosure, and FIG. 4 representatively shows an enlarged view of part B shown in FIG.

[0023] As shown in Figures 3 and 4, in this embodiment, the sealing member 121 has a substantially spherical structure. Based on this, the solenoid valve proposed in this disclosure has a second orifice 132 and does not have a first orifice 131. Specifically, the second orifice 132 is provided in the valve body 110, and the second orifice 132 is connected to the valve chamber and the outlet 1102. According to this, since the sealing member 121 having a spherical structure is prone to rotation during the operation of the core metal 120, by not providing the first orifice 131 in the sealing member 121, it is possible to avoid the first orifice 131 being unable to communicate with the passage 1201 and the outlet 1102 due to the rotation of the sealing member 121. By providing the second orifice 132 in the valve body 110, it is possible to directly communicate with the valve chamber and the outlet 1102, and it is also possible to ensure that the solenoid valve proposed in this disclosure has a constant flow rate even in the closed state.

[0024] Optionally, as shown in Figures 3 and 4, in this embodiment, the valve body 110 may have a body 112, an internal cavity 1121 of the body 112 defines a part of the valve chamber, and the inlet 1101 and the outlet 1102 of the solenoid valve are respectively provided in the body 112. Based on this, a second orifice 132 may be provided in the body 112, and the second orifice 132 may be connected to the internal cavity 1121 and the outlet 1102.

[0025] In other embodiments, when the solenoid valve proposed in the present disclosure is provided with only the second orifice 132, the sealing member 121 of the solenoid valve may have another structure, for example, the same structure as the sealing member 121 of the solenoid valve in the first embodiment, and is not limited to this embodiment.

[0026] Based on the detailed description of the second embodiment of the solenoid valve proposed in the present disclosure above, the operation principle of the solenoid valve in the second embodiment will be briefly described below.

[0027] When the core 120 is closed, i.e., when the core 120 is closed at the outlet 1102 of the solenoid valve by the sealing member 121, the lubricating oil separated by the oil separator can still flow through the solenoid valve via the path "inlet 1101 → valve chamber (inner cavity 1121 → second orifice 132 → outlet 1102", so that the solenoid valve has a constant flow rate in the closed state.

[0028] When the amount of lubricating oil separated by the oil separator is large, the solenoid valve is opened and the core 120 is opened, that is, the core 120 is separated from the outlet 1102, and the lubricating oil can flow through the solenoid valve via the path of "inlet 1101 → valve chamber (internal cavity 1121) → outlet 1102". Naturally, at the same time, the lubricating oil can also flow through the solenoid valve via the path of "inlet 1101 → valve chamber (internal cavity 1121 → second orifice 132 → outlet 1102", thereby satisfying the flow of a high flow rate.

[0029] Solenoid valve embodiment 3 Based on the detailed description of the first and second embodiments of the solenoid valve proposed in the present disclosure above, a third embodiment of the solenoid valve proposed in the present disclosure will be described below with reference to Fig. 5. In the third embodiment, the solenoid valve proposed in the present disclosure adopts a structural design that is almost the same as the above first and second embodiments, and the main differences of the solenoid valve in the third embodiment will be described below.

[0030] As shown in FIG. 5, a partially enlarged view of a solenoid valve in a third embodiment proposed in the present disclosure is representatively shown, which allows reference to FIG. 2, which corresponds to the enlarged area of ​​part A in FIG.

[0031] 5, in this embodiment, the solenoid valve proposed in the present disclosure has a first orifice 131 and a second orifice 132. Specifically, the first orifice 131 is provided in the sealing member 121, and the first orifice 131 is connected to the passage 1201 and the outlet 1102. The second orifice 132 is provided in the valve body 110, and the second orifice 132 is connected to the valve chamber and the outlet 1102. With the above structural design, the solenoid valve proposed in the present disclosure can utilize the first orifice 131 and the second orifice 132 to have a constant flow rate even when the solenoid valve is in a closed state.

[0032] Based on the detailed description of the third embodiment of the solenoid valve proposed in the present disclosure above, the operation principle of the solenoid valve in the third embodiment will be briefly described below.

[0033] When the core 120 is closed, i.e., when the core 120 is closed at the outlet 1102 of the solenoid valve by the sealing member 121, the lubricating oil separated by the oil separator can still flow through the solenoid valve via the paths "inlet 1101 → valve chamber (internal cavity 1121 → balancing hole 1202 → cylinder chamber 1111) → passage 1201 → first orifice 131 → outlet 1102" and "inlet 1101 → valve chamber (internal cavity 1121) → second orifice 132 → outlet 1102", so that the solenoid valve has a constant flow rate in the closed state.

[0034] When the amount of lubricating oil separated by the oil separator is large, the solenoid valve is opened and the core 120 is opened, that is, the core 120 is detached from the outlet 1102, and the lubricating oil can flow through the solenoid valve via the path of "inlet 1101 → valve chamber (internal cavity 1121) → outlet 1102". Naturally, at the same time, the lubricating oil can also flow through the solenoid valve via the paths of "inlet 1101 → valve chamber (internal cavity 1121 → cylinder chamber 1111) → passage 1201 → first orifice 131 → outlet 1102" and "inlet 1101 → valve chamber (internal cavity 1121) → second orifice 132 → outlet 1102", thereby satisfying the flow of a high flow rate.

[0035] Solenoid valve embodiment 4 Based on the detailed description of the third embodiment of the solenoid valve proposed in the present disclosure above, a fourth embodiment of the solenoid valve proposed in the present disclosure will be described below with reference to Fig. 6. In the fourth embodiment, the solenoid valve proposed in the present disclosure adopts a structural design that is almost the same as that of the third embodiment above, and the main differences of the solenoid valve in the fourth embodiment will be described below.

[0036] As shown in FIG. 6, a partially enlarged view of the fourth embodiment of the solenoid valve proposed in the present disclosure is representatively shown, which allows reference to FIG. 2, which corresponds to the enlarged area of ​​part A in FIG.

[0037] 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 provided on the sealing member 121 and spaced apart, and the first orifices 131 communicate with the passage 1201 and the outlet 1102. The two second orifices 132 are provided on the valve body 110 and spaced apart, and the second orifices 132 communicate with the valve chamber and the outlet 1102. With the above structural design, the solenoid valve proposed in the present disclosure can utilize the three first orifices 131 and the two second orifices 132 to have a constant flow rate even when the solenoid valve is in a closed state.

[0038] In addition, in other embodiments, when the solenoid valve proposed in the present disclosure has only the first orifice 131, the number of the first orifice 131 may be one or may be two or more. When the solenoid valve proposed in the present disclosure has only the second orifice 132, the number of the second orifice 132 may be one or may be two or more. When the solenoid valve proposed in the present disclosure has the first orifice 131 and the second orifice 132 at the same time, the number of the first orifice 131 may be one or may be two or more, and the number of the second orifice 132 may be one or may be two or more. In addition, when the solenoid valve has the first orifice 131 and the second orifice 132 at the same time, the number of the first orifice 131 and the second orifice 132 may be the same, but is not limited to this.

[0039] It should be noted here that the solenoid valves shown in the drawings and described herein are merely illustrative of some of the various solenoid valves that may employ the principles of the present disclosure, and it should be expressly understood that the principles of the present disclosure are not limited to any details or any components of the solenoid valves shown in the drawings or described herein.

[0040] As described above, the solenoid valve proposed in the present disclosure provides a first orifice and / or a second orifice, so that the solenoid valve has a certain flow rate even when the core is closed at the outlet. Thus, the refrigerant and lubricant discharged from the compressor can be reversed to the air intake of the compressor by the solenoid valve after being separated by the oil separator. During normal operation, the lubricant is reversed to the compressor by the orifice of the solenoid valve, and when the compressor discharges a large amount of lubricant, the solenoid valve is opened to ensure that the lubricant is reversed to the compressor in a timely manner. With the above structural design, the air conditioning system does not need to provide a parallel capillary tube and solenoid valve by using the solenoid valve proposed in the present disclosure, and can greatly reduce the equipment cost and simplify the system structure.

[0041] Based on the detailed description of some exemplary embodiments of the solenoid valve proposed in the present disclosure above, an exemplary embodiment of the air conditioning system proposed in the present disclosure will be described below with reference to FIG.

[0042] Referring to Figure 7, a partial system schematic diagram of the air conditioning system proposed in the present disclosure is representatively shown, specifically, the compressor oil return part of the air conditioning system is shown. In this exemplary embodiment, the air conditioning system proposed in the present disclosure is described as an example including a compressor oil return design. Those skilled in the art can easily understand that even if various modifications, additions, substitutions, deletions, or other changes are made to the specific embodiments below in order to apply the related design of the present disclosure to other types of air conditioning systems or other processes, these modifications are still within the principle of the air conditioning system proposed in the present disclosure.

[0043] As shown in FIG. 7, in this embodiment, the air conditioning system proposed in this disclosure includes a compressor 200 and an oil separator 300. Specifically, the compressor 200 has an oil outlet and an air inlet, the oil separator 300 has an oil inlet and an oil outlet, and the oil outlet is connected to the oil inlet. On this basis, the air conditioning system further includes the solenoid valve 100 proposed in this disclosure and described in detail in the above embodiment, the inlet of the solenoid valve 100 is connected to the oil outlet by the first pipe 410, and the outlet of the solenoid valve 100 is connected to the air inlet by the second pipe 420. According to this, by adopting the solenoid valve 100 proposed in this disclosure, during normal operation, the lubricating oil is backflowed to the compressor 200 by the orifice of the solenoid valve 100, and when the lubricating oil discharged by the compressor 200 is large, the solenoid valve 100 is opened to ensure that the lubricating oil is backflowed to the compressor 200 in a timely manner. Thanks to the above structural design, the air conditioning system proposed in the present disclosure does not require parallel capillary tubes and solenoid valves 100, which significantly reduces equipment costs while simplifying the system piping and protecting the solenoid valves 100 and the air conditioning system.

[0044] It should be noted here that the air conditioning systems shown in the drawings and described herein are merely illustrative of some of the various air conditioning systems that may employ the principles of the present disclosure, and it should be expressly understood that the principles of the present disclosure are not limited to any details or any components of the air conditioning systems shown in the drawings or described herein.

[0045] As described above, the air conditioning system proposed in the present disclosure adopts the solenoid valve proposed in the present disclosure, during normal operation, the lubricating oil is backflowed to the compressor by the orifice of the solenoid valve, and when the compressor discharges a large amount of lubricating oil, the solenoid valve is opened to ensure that the lubricating oil is backflowed to the compressor in a timely manner. Due to the above structural design, the air conditioning system proposed in the present disclosure does not need to install parallel capillaries and solenoid valves, which can greatly reduce the equipment cost and simplify the system structure.

[0046] Although the present disclosure has been described with reference to some exemplary embodiments, it should be understood that the terms used are for the purpose of description and illustration, and are not limiting. Since the present disclosure can be specifically implemented in various forms without departing from the spirit or nature of the disclosure, the above-described embodiments should not be limited to any of the details described above, but should be broadly interpreted within the spirit and scope defined by the appended claims, and therefore, it should be understood that all changes and modifications that fall within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. The valve body and the core metal are included. The valve body has a valve chamber and an inlet and an outlet communicating with the valve chamber. a passage is provided in the core, one end of the passage is connected to the valve chamber and the other end is closed by a sealing member, and a reset member is connected between the passage and the valve body for resettling the core at the outlet by the sealing member, A first orifice and a second orifice are provided. the first orifice is provided in the sealing member, and when the mandrel is closed at the outlet, one end of the first orifice is connected to the outlet and the other end is connected to the valve chamber through the passage; The second orifice is provided in the valve body and communicates with the valve chamber and the outlet.

2. 2. The solenoid valve according to claim 1, further comprising: said first orifice disposed at a central position of said sealing member and extending in a direction toward a centerline of said passage.

3. 2. The solenoid valve of claim 1 including at least two said first orifices each extending centerline of said passage and spaced apart.

4. the valve body has a body portion, an internal cavity of the body portion defining a portion of the valve chamber, the inlet and the outlet being each disposed in the body portion; The solenoid valve according to claim 1 , wherein the second orifice is disposed in the body portion, the second orifice communicating with the internal cavity and the outlet.

5. 2. The solenoid valve of claim 1 including at least two said second orifices spaced apart.

6. The valve body includes a duct portion and a main body portion, The duct portion has a cylindrical structure, a cylindrical opening at one end of the duct portion is closed, the core bar is provided in a cylindrical chamber of the duct portion, and has a gap between the core bar and a cylindrical wall; 2. The solenoid valve according to claim 1, wherein the main body portion is provided at a nozzle at the other end of the duct portion, an internal cavity of the main body portion is connected to a nozzle chamber of the duct portion to define the valve chamber together, and the inlet and the outlet are each provided in the main body portion.

7. 7. The solenoid valve according to claim 6, wherein an attraction member is provided in a cylindrical chamber of the duct portion to close a cylindrical opening at one end of the duct portion, and the return member is connected between the attraction member and the passage of the core metal.

8. 8. The solenoid valve according to claim 7, wherein a step structure is provided within the passage, one end of the return member is connected to a step surface of the step structure, and the other end protrudes from the passage and is connected to the attractor member.

9. An air conditioning system including a compressor and an oil separator, the compressor having an oil discharge port and an air intake port, the oil separator having an oil inlet and an oil outlet port, the oil discharge port being in communication with the oil inlet port, 9. An air conditioning system, further comprising a solenoid valve according to claim 1, wherein an inlet of the solenoid valve is connected to the oil outlet and an outlet of the solenoid valve is connected to the air intake.

10. The valve body and the core metal are included. The valve body has a valve chamber and an inlet and an outlet communicating with the valve chamber. a passage is provided in the core, one end of the passage is connected to the valve chamber and the other end is closed by a sealing member, and a reset member is connected between the passage and the valve body for resettling the core at the outlet by the sealing member, Only the second orifice is provided; the second orifice is provided in the valve body and communicates with the valve chamber and the outlet; The core metal of the solenoid valve has a spherical structure.

11. the valve body has a body portion, an internal cavity of the body portion defining a portion of the valve chamber, the inlet and the outlet being each disposed in the body portion; The solenoid valve according to claim 10 , wherein the second orifice is disposed in the body portion, the second orifice communicating with the internal cavity and the outlet.

12. 11. The solenoid valve of claim 10, including at least two said second orifices spaced apart.

13. The valve body includes a duct portion and a main body portion, The duct portion has a cylindrical structure, a cylindrical opening at one end of the duct portion is closed, the core bar is provided in a cylindrical chamber of the duct portion, and has a gap between the core bar and a cylindrical wall; 11. The solenoid valve according to claim 10, wherein the main body portion is provided at a nozzle at the other end of the duct portion, an internal cavity of the main body portion is connected to a nozzle chamber of the duct portion to define the valve chamber together, and the inlet and the outlet are each provided in the main body portion.

14. 14. The solenoid valve according to claim 13, wherein an attraction member is provided in a cylindrical chamber of the duct portion to close a cylindrical opening at one end of the duct portion, and the return member is connected between the attraction member and the passage of the core metal.

15. 15. The solenoid valve according to claim 14, wherein a step structure is provided within the passage, one end of the return member is connected to a step surface of the step structure, and the other end protrudes from the passage and is connected to the attractor member.

16. An air conditioning system including a compressor and an oil separator, the compressor having an oil discharge port and an air intake port, the oil separator having an oil inlet and an oil outlet port, the oil discharge port being in communication with the oil inlet port, 16. An air conditioning system, further comprising a solenoid valve according to any one of claims 10 to 15, wherein an inlet of the solenoid valve is connected to the oil outlet and an outlet of the solenoid valve is connected to the air intake.

Images