Electromagnetic valve, heat pump system and vehicle
By designing the abutment surface of the seal to be in close contact with the cavity and using polytetrafluoroethylene material, combined with the limiting groove and support, the problem of damage to the seal at the interface chamfer is solved, and the sealing performance and safety of the solenoid valve are improved.
Patent Information
- Application Number
- CN202410150144.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2025-08-05
AI Technical Summary
The sealing material of existing solenoid valves is easily damaged, deformed or stuck when chamfered through the housing hole, resulting in poor sealing performance, which in turn causes switching failure and solenoid valve damage.
The abutment surface of the seal is used to closely contact the inner wall of the cavity. The width of the abutment surface is greater than the interface width, which increases the contact area. Combined with the limiting groove and support, a seal made of polytetrafluoroethylene material is used to improve wear resistance and sealing.
Effectively prevent the seal from being damaged and deformed at the interface chamfers, improve sealing performance and the safety of the solenoid valve, and extend the service life of the seal.
Smart Images
Figure CN120426431A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of solenoid valves, and particularly to a solenoid valve, a heat pump system, and a vehicle. Background Art
[0002] Solenoid valves are widely used in heat pump systems and can switch between high and low temperatures through air or coolant. It is very important for the valve to have good sealing performance and smooth movement during operation. In an air-conditioning circuit, the operation of switching high-temperature air and low-temperature air by the solenoid valve requires a sealing function, where the sealing material is compressed and kept in contact with the inner hole. The operation of switching high-temperature air and low-temperature air can be achieved by a spring and air pressure, and the sealing function can be ensured by several sealing rings on the piston rod and the clearance control between the piston rod and the housing hole.
[0003] However, in the prior art, the sealing material on the piston rod is a lip seal, and the lip of the lip seal protrudes from the groove on the piston rod. When passing through the chamfer of the housing hole, the lip of the lip seal in contact with the piston rod is easily damaged, deformed, stuck, or flipped, resulting in very poor sealing performance of the lip seal in the solenoid valve and prone to switch failures, and further leading to damage to the solenoid valve. Summary of the Invention
[0004] In order to overcome the problems existing in the above prior art, the main purpose of this application is to provide a solenoid valve, a heat pump system, and a vehicle with good sealing performance and not easily damaged.
[0005] In order to achieve the above purpose, this application specifically adopts the following technical solutions:
[0006] A solenoid valve, comprising:
[0007] A housing provided with a cavity and a plurality of interfaces;
[0008] A piston rod movably disposed in the cavity, and the piston rod can move between a first position and a second position to change the communication state of each interface;
[0009] A seal sleeved on the outer surface of the piston rod, and the seal is provided with an abutting surface which is in close contact with the inner wall of the cavity, and the width of the abutting surface is greater than the width of each interface.
[0010] In some embodiments, the seal is provided with a spiral opening, the piston rod is provided with a limiting groove, and the seal is disposed in the limiting groove in a compressed state.
[0011] In some embodiments, the outer surface of the piston rod is provided with a protruding portion, and the solenoid valve further includes a plurality of limiting members respectively connected to both sides of the protruding portion to form the limiting groove.
[0012] In some embodiments, the solenoid valve further includes a support member sleeved on the outer surface of the piston rod and located at the bottom wall of the limiting groove, and the sealing member is sleeved on the support member.
[0013] In some embodiments, there are a plurality of the support members, and the plurality of support members are spaced apart along the width extension direction of the limiting groove.
[0014] In some embodiments, the bottom wall of the limiting groove is provided with a plurality of grooves, and the plurality of grooves are respectively spaced apart along the width extension direction of the limiting groove, and each of the support members is respectively disposed in each of the grooves.
[0015] In some embodiments, the sealing member is made of polytetrafluoroethylene.
[0016] In some embodiments, the plurality of interfaces respectively include a first interface, a second interface, a third interface and a fourth interface. When the piston rod moves to the first position, the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface. When the piston rod moves to the second position, the first interface is communicated with the fourth interface, and the second interface is communicated with the third interface.
[0017] A heat pump system includes a compressor, a condenser, an expansion valve, an evaporator and the solenoid valve according to any one of the above, the compressor, the condenser, the expansion valve and the evaporator are respectively connected, and the solenoid valve is respectively connected to the compressor, the condenser and the evaporator.
[0018] A vehicle includes a vehicle body and the heat pump system as described above, and the heat pump system is installed on the vehicle body.
[0019] The present application discloses a solenoid valve, including a housing, a piston rod and a sealing member. The housing is provided with a cavity and a plurality of interfaces. The piston rod is movably disposed in the cavity, and the piston rod can move between a first position and a second position to change the communication state of each of the interfaces. The sealing member is sleeved on the outer surface of the piston rod, and the sealing member is provided with an abutting surface which is in close contact with the inner wall of the cavity, and the width of the abutting surface is greater than the width of each of the interfaces. The sealing member of the present application is provided with an abutting surface which is in close contact with the inner wall of the cavity, and the width of the abutting surface is greater than the width of each of the interfaces. When the sealing member passes through the interface of the housing, the contact area between the sealing member and the chamfer of the interface is increased, thereby preventing the sealing member from being damaged and deformed when passing through the chamfer of the interface, ensuring the sealing performance of the sealing member, and improving the safety of the solenoid valve. Description of the Drawings
[0020] Figure 1Schematic structural diagram of the cross-section of the solenoid valve provided by the embodiment of the present application;
[0021] Figure 2 is Figure 1 partial enlarged view at location A in
[0022] Figure 3 Schematic structural diagram of the cross-section of another state of the solenoid valve provided by the embodiment of the present application;
[0023] Figure 4 Schematic structural diagram of the seal of the solenoid valve provided by the embodiment of the present application.
[0024] Reference numerals:
[0025] 1. Housing; 11. Cavity; 12. Interface; 120. First interface; 121. Second interface; 122. Third interface; 123. Fourth interface; 2. Piston rod; 21. Limiting groove; 22. Protruding part; 3. Seal; 31. Contact surface; 32. Spiral opening; 4. Support member; 5. Limiting member; 6. Spring; 7. Solenoid valve module. Detailed implementation manners
[0026] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0027] In the description of the present application, unless otherwise clearly defined and limited, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance; unless otherwise specified or stated, the term "plural" means two or more, and the term "multiple types" means two or more; the terms "connection", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.
[0028] In the description of this specification, it should be understood that the orientation terms such as "upper" and "lower" described in the embodiments of the present application are described from the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of the present application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.
[0029] Refer to Figure 1 、Figure 2 and Figure 3 as shown Figure 1 is a schematic cross-sectional structure diagram of the solenoid valve provided by the embodiment of the present application, Figure 2 is Figure 1 a partial enlarged view of the position A in Figure 3 is a schematic cross-sectional structure diagram of another state of the solenoid valve provided by the embodiment of the present application. This embodiment discloses a solenoid valve, which includes a housing 1, a piston rod 2, a seal 3, a spring 6 and a solenoid valve module 7. The housing 1 is provided with a cavity 11 and a plurality of interfaces 12. The piston rod 2 is movably arranged in the cavity 11, and the piston rod 2 can move between a first position B and a second position C to change the connection state of each interface 12. The solenoid valve module 7 is arranged in the cavity 11 for connecting a power supply. The spring 6 is connected to the solenoid valve module 7. The seal 3 is sleeved on the outer surface of the piston rod 2, and the seal 3 is provided with an abutting surface 31, and the abutting surface 31 is in close contact with the inner wall of the cavity 11. The width of the abutting surface 31 is greater than the width of each interface 12. Among them, the width of the abutting surface 31 is Figure 1 L1 in Figure 1 and the width of the interface 12 is
[0030] L2 in Figure 1 In this embodiment, the piston rod 2 in Figure 3 is in the first position B, and at this time the solenoid valve is in the energized state,
[0031] In this embodiment, the seal 3 is made of polytetrafluoroethylene (English full name: Polytetrafluoroethene, abbreviation: PTFE). The polytetrafluoroethylene material has a certain hardness and good wear resistance, so that when the seal 3 passes through the interface 12, it will not be easily damaged by the chamfer of the interface 12, which improves the service life of the seal 3 and improves the sealing performance of the seal 3. It can be understood that in other embodiments, the seal 3 can also be made of other materials.
[0032] The seal 3 of this embodiment is provided with an abutting surface 31. The abutting surface 31 is in close contact with the inner wall of the cavity 11, and the width of the abutting surface 31 is greater than the width of each interface 12. When the seal 3 passes through the interface 12 of the housing 1, the contact area between the seal 3 and the chamfer of the interface 12 is increased, thereby preventing the seal 3 from being damaged and deformed when passing through the chamfer of the interface 12, ensuring the sealing performance of the seal 3, and improving the safety of the solenoid valve.
[0033] Refer to Figure 2 and Figure 4 as shown, Figure 4 is a schematic structural diagram of the seal of the solenoid valve provided by the embodiment of the present application. The piston rod 2 is provided with a limiting groove 21. The seal 3 is arranged in the limiting groove 21. The limiting groove 21 is used to limit the seal 3. The seal 3 is provided with a spiral opening 32 so that the length of the seal 3 can be changed, thereby facilitating the placement of the seal 3 in the limiting groove 21. The seal 3 has an expanded state and a compressed state. When the seal 3 is not placed in the limiting groove 21, the seal 3 is in the expanded state. When the seal 3 is placed in the limiting groove 21, the seal 3 is in the compressed state, where Figure 4 the seal 3 in
[0034] Refer to Figure 1 and Figure 2 as shown. A convex portion 22 is provided on the outer surface of the piston rod 2. The solenoid valve further includes a plurality of limiting members 5 and a support member 4. The plurality of limiting members 5 are respectively connected to both sides of the convex portion 22 to form the limiting groove 21. A plurality of grooves (not shown in the figure) are provided on the bottom wall of the limiting groove 21. The plurality of grooves are spaced apart along the width extension direction of the limiting groove 21. There are a plurality of support members 4. Each support member 4 is respectively sleeved on the outer surface of the piston rod 2 and is located in each groove. The seal 3 is sleeved on the support member 4. The support member 4 is used to support the seal 3 so that the seal 3 can be closely fitted with the inner wall of the cavity 11, improving the sealing performance between the seal 3 and the inner wall of the cavity 11. The groove is used to limit the support member 4 to prevent the support member 4 from moving when the seal 3 contacts and rubs against the inner wall of the cavity 11, which affects the uniformity of the force for supporting the seal 3, ensuring the sealing performance of the seal 3.
[0035] In this embodiment, the convex portion 22 and the limiting member 5 are integrally formed with the piston rod 2 respectively, which is convenient for manufacturing. It can be understood that in other embodiments, the convex portion 22 and the limiting member 5 can also be separately provided from the piston rod 2.
[0036] In this embodiment, there are three support members 4, and one support member 4 is provided on each of the two sides and the middle of the seal member 3 to ensure uniform force for supporting the seal member 3, so that the abutting surface 31 of the seal member 3 can be fully fitted to the inner wall of the cavity 11, improving the sealing performance of the seal member 3. It can be understood that only one, two or more than three support members 4 can also be provided.
[0037] In this embodiment, by providing the convex portion 22, the thickness of the seal member 3 and the support member 4 in the radial direction is reduced, reducing the manufacturing cost.
[0038] In this embodiment, the support member 4 is made of an elastic material. When the seal member 3 passes through the inner wall of the cavity 11, it will squeeze the support member 4, so that it can receive the reaction force of the support member 4 and be in close contact with the inner wall of the cavity 11, improving the sealing performance of the seal member 3. It can be understood that in other embodiments, the support member 4 can also be made of other materials.
[0039] Based on this embodiment, a heat pump system is also disclosed. The heat pump system includes a compressor, a condenser, an expansion valve, an evaporator and the solenoid valve according to any one of the above. The exhaust end of the compressor is connected to the first interface 120 of the solenoid valve, the condenser is connected to the fourth interface 123 of the solenoid valve, the intake end of the compressor is connected to the third interface 122 of the solenoid valve, and the evaporator is connected to the second interface 121 of the solenoid valve.
[0040] Corresponding to the above embodiment, the present application also provides a vehicle, which includes a vehicle body and the above heat pump system. The heat pump system is installed on the vehicle body for heating and cooling.
[0041] In a specific application scenario, when the air conditioner unit is cooling, the solenoid valve module 7 is in a power-off state, and the piston rod 2 is in the second position C. The refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant in the compressor, and then flows into the first interface 120 of the solenoid valve and then from the fourth interface 123 of the solenoid valve into the condenser. It condenses and absorbs heat in the condenser to become a high-temperature and high-pressure liquid refrigerant, and then flows to the expansion valve. After passing through the expansion valve to form a low-temperature and low-pressure liquid refrigerant, it enters the evaporator to form a low-temperature and low-pressure gaseous refrigerant. The low-temperature and low-pressure gaseous refrigerant flows into the second interface 121 of the solenoid valve and then flows back to the compressor from the third interface 122 of the solenoid valve, and cycles in this way; when the air conditioner unit is heating, the solenoid valve module 7 is in a power-on state, and the piston rod 2 moves to the first position B. At this time, the first interface 120 is connected to the second interface 121, and the third interface 122 is connected to the fourth interface 123. The low-temperature and low-pressure refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant in the compressor, and then flows into the first interface 120 of the solenoid valve and then from the second interface 121 of the solenoid valve into the evaporator, and then flows to the expansion valve and then enters the condenser to form a low-temperature and low-pressure refrigerant. The low-temperature and low-pressure refrigerant flows into the fourth interface 123 of the solenoid valve and then flows back to the compressor from the third interface 122 of the solenoid valve, and cycles in this way.
[0042] As described above, it is only the preferred specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A solenoid valve, characterized in that: include: A housing, wherein the housing is provided with a cavity and a plurality of interfaces; a piston rod, the piston rod being movably disposed in the cavity and capable of moving between a first position and a second position to change the communication state of each of the interfaces; A sealing member is sleeved on the outer surface of the piston rod, and the sealing member is provided with an abutting surface, the abutting surface is in close contact with the inner wall of the cavity, and the width of the abutting surface is greater than the width of each of the interfaces.
2. The solenoid valve according to claim 1, characterized in that The sealing member is provided with a spiral opening, the piston rod is provided with a limiting groove, and the sealing member is arranged in the limiting groove in a compressed state.
3. The solenoid valve according to claim 2, characterized in that A protrusion is provided on the outer surface of the piston rod, and the solenoid valve further comprises a plurality of limiting members, which are respectively connected to both sides of the protrusion to form the limiting groove.
4. The solenoid valve according to claim 2, characterized in that The solenoid valve further includes a support member, which is sleeved on the outer surface of the piston rod and located on the bottom wall of the limiting groove, and the sealing member is sleeved on the support member.
5. The solenoid valve according to claim 4, characterized in that There are multiple support members, and the multiple support members are distributed at intervals along the width extension direction of the limiting groove.
6. The solenoid valve according to claim 5, characterized in that The bottom wall of the limiting groove is provided with a plurality of grooves, and the plurality of grooves are respectively distributed at intervals along the width extension direction of the limiting groove, and each of the supporting members is respectively arranged in each of the grooves.
7. The solenoid valve according to claim 1, characterized in that The sealing element is made of polytetrafluoroethylene.
8. The solenoid valve according to any one of claims 1 to 7, characterized in that: The multiple interfaces include a first interface, a second interface, a third interface and a fourth interface respectively. When the piston rod moves to the first position, the first interface is connected to the second interface, and the third interface is connected to the fourth interface. When the piston rod moves to the second position, the first interface is connected to the fourth interface, and the second interface is connected to the third interface.
9. A heat pump system, characterized in that: The invention comprises a compressor, a condenser, an expansion valve, an evaporator and a solenoid valve according to any one of claims 1 to 8, wherein the compressor, the condenser, the expansion valve and the evaporator are connected respectively, and the solenoid valve is connected to the compressor, the condenser and the evaporator respectively.
10. A vehicle, characterized in that: The heat pump system comprises a vehicle body and the heat pump system according to claim 9, wherein the heat pump system is installed on the vehicle body.