Electric valve, air conditioning system and vehicle

Abstract

The utility model discloses an electric valve, an air conditioning system and a vehicle, the electric valve comprises a valve body, a coil assembly and a sealing piece, and the coil assembly is arranged on the valve body in a sleeving mode; the sealing piece is arranged between the valve body and the coil assembly in a sealed mode, and the sealing piece and the coil assembly are integrally arranged. According to the electric valve provided by the embodiment of the invention, the sealing element and the coil assembly are integrally arranged, so that the number of parts of the whole electric valve is reduced, the procedure of assembling the sealing element is saved, and the phenomenon of neglected assembly of the sealing element is avoided; and the sealing piece and the coil assembly are stably connected and are not prone to falling off, the sealing performance between the valve body and the coil assembly is guaranteed, and water can be effectively prevented from entering the position between the valve body and the coil assembly to cause corrosion and rusting of the valve body.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to an electric valve, an air-conditioning system and a vehicle. Background Art

[0002] Electric valves are controlled by electric actuators to open and close the valves. Electric valves include electronic expansion valves, etc. In the vehicle's air conditioning system, the temperature of the refrigerant drops sharply during the process of changing from a high-pressure state to a low-pressure state, so that it can be used for cooling. Electronic expansion valves can be used to control the refrigerant flow rate, cooling speed, etc., so that the refrigerant circuit system always maintains the best state.

[0003] The existing electronic expansion valve includes a valve body for flow regulation and a coil assembly for providing driving force. The coil assembly is installed on the valve body. In order to prevent moisture from entering between the valve body and the coil assembly shell and causing corrosion and rust on the valve body, a sealing ring is usually provided between the valve body and the coil assembly. The existing sealing ring is a separate part, resulting in a large number of overall parts of the electronic expansion valve, which is inconvenient to install and prone to missing installation. In addition, the sealing ring connection is unstable and the sealing effect is poor. Utility Model Content

[0004] The purpose of the present application is to provide an electric valve, an air-conditioning system and a vehicle, which solve the problem that the electric valve has a large number of overall parts, is inconvenient to install, and has unstable sealing connection.

[0005] To achieve the purpose of this application, this application provides the following technical solutions:

[0006] In a first aspect, the present application provides an electric valve, comprising:

[0007] Valve body;

[0008] A coil assembly, wherein the coil assembly is sleeved on the valve body;

[0009] A sealing member is sealingly disposed between the valve body and the coil assembly, and the sealing member and the coil assembly are integrally disposed.

[0010] In one embodiment, the coil assembly includes a coil and a shell, the shell accommodates the coil, and the shell is sleeved on the valve body, and the sealing member is integrally provided with the shell.

[0011] In one embodiment, the seal and the housing are formed by injection molding.

[0012] In one embodiment, the seal is interference fit with the valve body, and the interference between the seal and the valve body is less than 0.8 mm.

[0013] In one embodiment, the shell forms a mounting groove, the valve body is disposed in the mounting groove, and the sealing member abuts against the valve body to close the mounting groove.

[0014] In one embodiment, the mounting groove includes a first bottom wall and a first side wall arranged along the circumference of the first bottom wall, and the sealing member is arranged between the first side wall and the valve body.

[0015] In one embodiment, a groove is provided on the first side wall, the sealing member is provided in the groove, and the groove includes a second bottom wall and a second side wall provided circumferentially along the second bottom wall, and the sealing member is connected to the second bottom wall and the second side wall.

[0016] In one embodiment, the second side wall is connected between the first side wall and the second bottom wall, the second side wall includes an abutting section and a guide section, the sealing member abuts against the abutting section, and the guide section is connected to one end of the abutting section close to the first side wall;

[0017] The distance between the guide section and the valve body gradually increases from an end close to the first bottom wall to an end close to the sealing member.

[0018] In one embodiment, the sealing member is provided with an exhaust hole, the exhaust hole is located between the valve body and the abutting section, and the exhaust hole is communicated with the mounting groove.

[0019] In one embodiment, a protrusion is provided on the first side wall, the protrusion has a connecting wall connected to the first side wall, and the sealing member is connected to the first side wall and the connecting wall.

[0020] In one embodiment, the electric valve further comprises a valve seat, the valve body is fixed on the valve seat, a fixing frame is provided on the valve seat, and the coil assembly is connected to the fixing frame.

[0021] In a second aspect, the present application also provides an air conditioning system, comprising the electric valve as described above.

[0022] In a third aspect, the present application also provides a vehicle, comprising the air-conditioning system as described above or the electric valve as described above.

[0023] The electric valve provided in the embodiment of the present application integrates the seal and the coil assembly, which reduces the number of components of the electric valve as a whole, saves the process of assembling the seal, and avoids the phenomenon of missing seals; and the seal is firmly connected to the coil assembly and is not easy to fall off, thereby ensuring the sealing between the valve body and the coil assembly, and can effectively prevent moisture from entering between the valve body and the coil assembly to cause corrosion and rust of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A cross-sectional view of an electric valve according to an embodiment of the present application;

[0026] Figure 2 For one implementation of this application Figure 1 The enlarged view of point A in the middle;

[0027] Figure 3 A cross-sectional view of a coil assembly according to an embodiment of the present application;

[0028] Figure 4 A cross-sectional view of a coil assembly according to another embodiment of the present application;

[0029] Figure 5 A schematic diagram of the partial structure of an electric valve according to an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100, valve body; 200, coil assembly; 210, coil; 220, shell; 221, mounting groove; 222, first bottom wall; 223, first side wall; 224, groove; 225, second bottom wall; 226, second side wall; 226a, abutment section; 226b, guide section; 227, protrusion; 228, connecting wall; 300, sealing member; 310, exhaust hole; 400, chamber; 500, valve seat; 510, fixing frame. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0033] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in this application and in the specification are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this application includes any and all combinations of one or more of the related listed items.

[0035] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0036] In the vehicle's air conditioning system, refrigerant (coolant) plays an important role. The working principle of air conditioning refrigerant is to continuously circulate in the cold cycle system, change its own state and continuously absorb and release heat to achieve the purpose of transporting heat. After the air conditioner starts working, the liquid refrigerant is transported to the evaporator for heating and evaporation to convert into gas. The process of converting the refrigerant from liquid to gas will absorb the heat in the room. Then the gaseous low-pressure refrigerant is transported to the compressor to be compressed into high-pressure gas and discharged into the condenser. In the condenser, it releases heat by inhaling outdoor air and condenses into high-pressure liquid. It is throttled by the electric valve to low-pressure and low-temperature refrigerant and sent to the evaporator again to complete the refrigeration cycle.

[0037] The electric valve includes a valve body, a valve seat and a coil assembly. The valve body is connected to the valve seat. The valve body is used to adjust the opening of the valve to control the flow of the fluid. The coil assembly provides driving force for the valve body. The coil assembly is installed on the valve body. The magnetic field is generated by energizing the coil in the coil assembly to move the valve core in the valve body to control the opening of the valve, thereby controlling the flow of the refrigerant. In order to prevent moisture from entering between the valve body and the coil assembly housing to cause corrosion and rust of the valve body, a sealing ring is usually set between the valve body and the coil assembly; the existing sealing ring is a separate part, resulting in a large number of overall parts of the electronic expansion valve, which is not easy to install and is prone to missing installation. In addition, the sealing ring connection is unstable and the sealing effect is poor.

[0038] Please refer to Figure 1 and Figure 2 , Figure 1 This is a cross-sectional view of an electric valve according to an embodiment of the present application. Figure 2 For one implementation of this application Figure 1Enlarged view of point A in the middle. The present application provides an electric valve, including a valve body 100, a coil assembly 200 and a seal 300, wherein the coil assembly 200 is sleeved on the valve body 100; the seal 300 is sealingly arranged between the valve body 100 and the coil assembly 200, and the seal 300 and the coil assembly 200 are arranged in one piece. The electric valve provided by the present application integrates the seal 300 and the coil assembly 200, thereby reducing the number of parts of the electric valve as a whole, saving the process of assembling the seal 300, and avoiding the phenomenon of missing the seal 300; and the seal 300 and the coil assembly 200 are arranged in one piece, so that the seal 300 and the coil assembly 200 are firmly connected and not easy to fall off, thereby ensuring the sealing between the valve body 100 and the coil assembly 200, and being able to effectively inhibit moisture from entering between the valve body 100 and the coil assembly 200 to cause corrosion and rust of the valve body 100.

[0039] Specifically, the coil assembly 200 includes a coil 210 and a housing 220. The housing 220 accommodates the coil 210, and the housing 220 protects the coil 210. The housing 220 is sleeved on the valve body 100, and the seal 300 is integrally arranged with the housing 220. In the embodiment of the present application, the housing 220 and the seal 300 are formed by a secondary molding process such as secondary injection molding or welding. The material of the housing 220 is plastic, etc., and the material of the seal 300 is plastic, rubber or other soft materials with a melting temperature lower than that of the housing 220. The secondary injection molding process is used to form an integral structure with the housing 220 and the seal 300, so that the connection between the seal 300 and the housing 220 is firm, the seal 300 is not easy to fall off, the seal 300 and the housing 220 have good sealing performance, and the seal 300 made of soft material is sleeved on the valve body 100 to ensure the sealing performance between the valve body 100 and the housing 220.

[0040] In one embodiment, the housing 220 and the seal 300 are formed into an integral structure through a secondary injection molding process. The housing 220 is first injection molded to form a mounting groove 221 capable of accommodating the valve body 100, and then the seal 300 is molded to make the seal 300 and the housing 220 integral. After the seal 300 and the housing 220 are sleeved on the valve body 100, the seal 300 is held against the valve body 100 to close the mounting groove 221. Specifically, the valve body 100 is partially inserted into the mounting groove 221, and the coil 210 in the housing 220 is energized to generate a magnetic field to drive the valve core to move, thereby realizing the control of the valve opening; after the mounting groove 221 is closed by the seal 300, a closed chamber 400 is formed, thereby being able to inhibit moisture from entering the chamber 400 and reduce corrosion and rust of the valve body 100.

[0041] In the electric valve of the embodiment of the present application, the seal 300 and the valve body 100 are interference fit to achieve radial sealing of the valve body 100, thereby achieving waterproof effect, and the interference between the seal 300 and the valve body 100 is less than 0.8mm. Specifically, the interference between the seal 300 and the valve body 100 is greater than zero, and the unilateral interference between the seal 300 and the valve body 100 is less than 0.8mm. Within the interference range of less than 0.8mm, the installation of the coil assembly 200 can be facilitated while ensuring waterproof effect; if the interference between the seal 300 and the valve body 100 is too large, it is easy to hold your breath during the installation of the coil assembly 200, resulting in greater damping during the installation.

[0042] refer to Figure 1 and Figure 3 , Figure 1 This is a cross-sectional view of an electric valve according to an embodiment of the present application. Figure 3 This is a cross-sectional view of a coil assembly 200 according to an embodiment of the present application. The shell 220 forms a mounting groove 221 , which includes a first bottom wall 222 and a first side wall 223 circumferentially arranged along the first bottom wall 222 . The seal 300 is arranged between the first side wall 223 and the valve body 100 . Specifically, after the shell 220 is sleeved on the valve body 100, there is a gap between the valve body 100 and the groove wall of the installation groove 221, and the seal 300 is integrally arranged on the first side wall 223, that is, the seal 300 is arranged between the first side wall 223 and the valve body 100 to achieve sealing between the first side wall 223 and the valve body 100, inhibit moisture from entering the gap between the valve body 100 and the shell 220, and ensure the sealing of the chamber 400; and the seal 300 is arranged on one end of the first side wall 223 away from the first bottom wall 222 to increase the sealing range of the valve body 100, and only one seal 300 is required to achieve sealing between the shell 220 and the valve body 100.

[0043] refer to Figure 3In one embodiment, a groove 224 is provided on the first side wall 223 of the shell 220 in the coil assembly 200 of the present application, and a seal 300 is disposed in the groove 224, and the groove 224 includes a second bottom wall 225 and a second side wall 226 arranged circumferentially along the second bottom wall 225, the second side wall 226 is connected between the first side wall 223 and the second bottom wall 225, and the seal 300 is connected to the second bottom wall 225 and the second side wall 226. Specifically, the groove 224 is provided for the installation of the seal 300, and the seal 300 is molded on the second bottom wall 225 and the second side wall 226 to increase the connection area between the seal 300 and the shell 220, improve the connection strength between the seal 300 and the shell 220, and the seal 300 is not easy to fall off; and when the shell 220 is installed, the second bottom wall 225 and the second side wall 226 can squeeze the seal 300, so that the seal 300 is tightly pressed against the valve body 100, thereby improving the sealing effect between the shell 220 and the valve body 100.

[0044] refer to Figure 4 , Figure 4 is a cross-sectional view of a coil assembly 200 according to another embodiment, Figure 3 Compared with the coil assembly 200 shown in the figure, in the present embodiment, a protrusion 227 is provided on the first side wall 223 of the shell 220 in the coil assembly 200, and the protrusion 227 has a connecting wall 228 connected to the first side wall 223, and the sealing member 300 is connected to the first side wall 223 and the connecting wall 228. Specifically, the sealing member 300 is connected to the protrusion 227, and the sealing member 300 is formed on the first side wall 223 and the connecting wall 228, which can also increase the connection area between the sealing member 300 and the shell 220, and improve the connection strength between the sealing member 300 and the shell 220.

[0045] refer to Figure 1 , Figure 3 and Figure 5 , Figure 5This is a partial structural diagram of an electric valve according to an embodiment of the present application. A vent hole 310 is provided on the seal 300, and the vent hole 310 is connected to the mounting groove 221. Specifically, by providing the vent hole 310 on the seal 300, the gas in the mounting groove 221 can be discharged from the vent hole 310, thereby reducing the gas pressure in the chamber 400, reducing the installation resistance of the coil assembly 200, and facilitating the installation of the coil assembly 200; when the coil assembly 200 is sleeved on the valve body 100, due to the interference fit between the seal 300 and the valve body 100, the seal 300 is squeezed by the valve body 100, so that the vent hole 310 is closed, which can effectively prevent moisture from entering the chamber 400 and achieve waterproofing; the vent hole 310 runs through the seal 300, so that the gas in the chamber 400 can be discharged outward, the vent hole 310 can be arranged along the axial direction of the valve body 100 or arranged obliquely, and the number of the vent holes 310 can be one or more, and there is no specific limitation.

[0046] In one embodiment, the electric valve further includes a valve seat 500, the valve body 100 is fixed on the valve seat 500, a fixing frame 510 is provided on the valve seat 500, the coil assembly 200 is connected to the fixing frame 510, and the fixing frame 510 is used to achieve the connection between the coil assembly 200 and the valve body 100. The exhaust hole 310 extends from the second side wall 226 toward the fixing frame 510, that is, the exhaust hole 310 penetrates the sealing member 300 from top to bottom, so that the gas in the chamber 400 can be discharged to the outside.

[0047] In one embodiment, the second side wall 226 includes an abutting section 226a and a guide section 226b, the sealing member 300 abuts against the abutting section 226a, the guide section 226b is connected to one end of the abutting section 226a close to the first side wall 223, and the distance between the guide section 226b and the valve body 100 gradually increases from the end close to the first bottom wall 222 to the end close to the sealing member 300. Specifically, the exhaust hole 310 is provided below the guide section 226b, and the exhaust hole 310 is located between the valve body 100 and the abutting section 226a, and the closer the distance between the guide section 226b and the valve body 100 is to the exhaust hole 310, the larger it is, so as to guide the gas in the chamber 400 and facilitate gas discharge.

[0048] The electric valve provided in the embodiment of the present application has fewer overall parts, saves the installation process of the seal 300, avoids the occurrence of the seal 300 missing, and the housing 220 and the seal 300 are integrally arranged, with high connection strength, not easy to fall off, and good sealing effect; at the same time, the exhaust hole 310 is arranged on the seal 300, which can discharge the high-pressure gas in the chamber 400, reduce the installation resistance between the coil assembly 200 and the valve body 100, and facilitate the assembly of the electric valve as a whole. When the electric valve is used in the vehicle air-conditioning system, the cooling or heating effect of the air-conditioning system is guaranteed, and the user's driving experience is improved.

[0049] An embodiment of the present application provides an air conditioning system, including the above-mentioned electric valve, and has corresponding beneficial effects.

[0050] An embodiment of the present application provides a vehicle, including the above-mentioned air-conditioning system or the above-mentioned electric valve, and having corresponding beneficial effects.

[0051] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0052] What is disclosed above is only a preferred embodiment of the present application, and it certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiment and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An electric valve, characterized in that: include: Valve body; A coil assembly, wherein the coil assembly is sleeved on the valve body; A sealing member is sealingly disposed between the valve body and the coil assembly, and the sealing member and the coil assembly are integrally disposed.

2. The electric valve according to claim 1, characterized in that: The coil assembly comprises a coil and a shell, wherein the shell accommodates the coil and is sleeved on the valve body, and the sealing member is integrally arranged with the shell.

3. The electric valve according to claim 2, characterized in that: The sealing element and the housing are formed by injection molding.

4. The electric valve according to claim 1, characterized in that: The sealing member is interference fit with the valve body, and the interference amount between the sealing member and the valve body is less than 0.8 mm.

5. The electric valve according to claim 2, characterized in that: The shell body forms a mounting groove, the valve body is arranged in the mounting groove, and the sealing member abuts against the valve body to close the mounting groove.

6. The electric valve according to claim 5, characterized in that: The mounting groove includes a first bottom wall and a first side wall arranged along the circumference of the first bottom wall, and the sealing member is arranged between the first side wall and the valve body.

7. The electric valve according to claim 6, characterized in that: The first side wall is provided with a groove, the sealing member is arranged in the groove, and the groove includes a second bottom wall and a second side wall arranged along the circumference of the second bottom wall, and the sealing member is connected to the second bottom wall and the second side wall.

8. The electric valve according to claim 7, characterized in that: The second side wall is connected between the first side wall and the second bottom wall, the second side wall comprises an abutting section and a guiding section, the sealing member abuts against the abutting section, and the guiding section is connected to one end of the abutting section close to the first side wall; The distance between the guide section and the valve body gradually increases from an end close to the first bottom wall to an end close to the sealing member.

9. The electric valve according to claim 8, characterized in that: The sealing member is provided with an exhaust hole, the exhaust hole is located between the valve body and the abutting section, and the exhaust hole is communicated with the mounting groove.

10. The electric valve according to claim 6, characterized in that: The first side wall is provided with a protrusion, the protrusion has a connecting wall connected to the first side wall, and the sealing component is connected to the first side wall and the connecting wall.

11. The electric valve according to claim 1, characterized in that: The electric valve further comprises a valve seat, the valve body is fixed on the valve seat, a fixing frame is arranged on the valve seat, and the coil assembly is connected to the fixing frame.

12. An air conditioning system, characterized in that: Comprising an electric valve as described in any one of claims 1-11.

13. A vehicle, characterized in that: It comprises the air conditioning system as claimed in claim 12 or the electric valve as claimed in any one of claims 1-11.

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