Motorised valve

Abstract

An electric valve includes a valve body member, a valve core, a valve core seat, and a first seal member, the valve body member includes a receiving portion, the receiving portion forms a receiving cavity, the first seal member includes a first protruding portion, a second protruding portion, and a main body portion, the valve core seat includes an inner circumferential surface and an outer circumferential surface, the outer circumferential surface includes a first surface and a second surface, at least a portion of the valve core seat is located in the receiving cavity, the first seal member is located in the receiving cavity, along a radial direction of the receiving portion, the main body portion is located between the first protruding portion and the second protruding portion, the first seal member is compressed between the receiving portion and the second surface by the first protruding portion and the second protruding portion, along an axial direction of the receiving portion, the main body portion is compressed between the first surface and a side wall of the valve body member, and an outer surface of at least a portion of the valve core is tightly fitted with a portion of the inner circumferential surface.

Description

Technical Field

[0001] This application relates to an electric valve. Background Technology

[0002] Electric valves are generally used for flow path control in thermal management systems. An electric valve consists of a valve core, which switches between different flow paths by rotating the valve core. How to improve the sealing performance of the valve core during rotation and reduce the risk of internal leakage during rotation is a technical problem that needs to be improved. Summary of the Invention

[0003] The purpose of this application is to provide a control valve that improves the sealing performance of an electric valve and reduces the risk of internal leakage during valve core rotation.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] An electric valve includes a valve body component, a valve core, a valve core seat, and a first sealing element. The valve body component has a valve body cavity, the valve core is located in the valve body cavity, and the valve body component includes a receiving portion forming a receiving cavity. The first sealing element includes a first protrusion, a second protrusion, and a main body portion. The valve core seat includes an inner peripheral surface and an outer peripheral surface, the outer peripheral surface including a first surface and a second surface. At least a portion of the valve core seat is located in the receiving cavity, and the first sealing element is located in the receiving cavity, with the first sealing element located on the outer periphery of the second surface.

[0006] Along the radial direction of the receiving portion, the main body portion is located between the first protrusion and the second protrusion, the first protrusion abuts against the second surface, the second protrusion abuts against the receiving portion, and the first seal is pressed between the receiving portion and the second surface by the first protrusion and the second protrusion; along the axial direction of the receiving portion, one end of the main body portion abuts against the first surface, and the other end of the main body portion abuts against the side wall of the valve body component, and the first seal is pressed between the first surface and the side wall of the valve body component; at least a portion of the outer surface of the valve core is in close contact with a portion of the inner circumferential surface.

[0007] This application provides an electric valve, including a valve body component, a valve core, a valve core seat, and a first seal. The valve body component includes a receiving portion forming a receiving cavity. The first seal includes a first protrusion, a second protrusion, and a main body. The valve core seat includes an inner peripheral surface and an outer peripheral surface. The outer peripheral surface includes a first surface and a second surface. At least a portion of the valve core seat is located in the receiving cavity. The first seal is located in the receiving cavity. Along the radial direction of the receiving portion, the main body is located between the first protrusion and the second protrusion. The first seal is pressed between the receiving portion and the second surface by the first protrusion and the second protrusion. Along the axial direction of the receiving portion, the main body is pressed between the first surface and the side wall of the valve body component. At least a portion of the outer surface of the valve core is in close contact with a portion of the inner peripheral surface. Under the action of the first protrusion and the second protrusion, the main body can be centered and held in place, allowing the main body to be fully pressed against the first surface and the side wall of the valve body component, respectively. This helps to ensure the sealing performance of the main body and allows the inner circumferential surface to fit better against the outer surface of the valve core, thereby improving the sealing performance of the electric valve and reducing the risk of internal leakage during the rotation of the valve core. Attached Figure Description

[0008] Figure 1 This is a three-dimensional structural diagram of an electric valve;

[0009] Figure 2 This is a schematic diagram of a cross-sectional structure of an electric valve;

[0010] Figure 3 yes Figure 2 A three-dimensional structural diagram of the first valve body in the middle;

[0011] Figure 4 yes Figure 2 A three-dimensional structural diagram of the second valve body;

[0012] Figure 5 This is a schematic diagram of a cross-sectional structure after the first valve body and the second valve body are assembled.

[0013] Figure 6 yes Figure 2 A magnified view of part A in the middle;

[0014] Figure 7 yes Figure 6 A schematic diagram of a cross-sectional structure of the valve core seat;

[0015] Figure 8 yes Figure 6 A three-dimensional structural diagram of the central sealing component;

[0016] Figure 9 yes Figure 8 A schematic diagram of a cross-sectional structure of the central sealing component;

[0017] Figure 10yes Figure 2 A three-dimensional structural diagram of the valve core;

[0018] Figure 11 yes Figure 7 A magnified view of part B in the middle section;

[0019] Figure 12 This is a schematic diagram of another cross-sectional structure of the electric valve;

[0020] Figure 13 This is a schematic diagram of a cross-sectional structure of the valve core when it is at a 45° position.

[0021] Figure 14 This is a schematic diagram of a cross-sectional structure of the valve core when it is at a 90° position.

[0022] Figure 15 This is a schematic diagram of a cross-sectional structure of the valve core when it is at a 135° position.

[0023] Figure 16 This is a schematic diagram of a cross-sectional structure of the valve core when it is in the 180° position. Detailed Implementation

[0024] The present application will be further described below with reference to the accompanying drawings and specific embodiments:

[0025] See Figure 1 and Figure 2 The electric valve can be applied to vehicle thermal management systems, including thermal management systems for new energy vehicles. The electric valve 100 includes a drive component 1, a valve body component 2, a valve stem 3, and a valve core 4. The drive component 1 is connected to the valve body component 2. The valve core 4 is located within the valve body cavity 20 formed by the valve body component 2. One end of the valve stem 3 is driveably connected to the drive component 1, and the other end is driveably connected to the valve core 4. The motor output torque of the drive component 1 is transmitted to the valve stem 3, which then drives the valve core 4 to rotate. In this embodiment, the valve stem 3 and valve core 4 are separate structures; however, in other embodiments, the valve stem 3 and valve core 4 can also be an integral structure. Furthermore, in this embodiment, the drive component 1 also includes a transmission mechanism 11, which can be a gear reduction mechanism. At least a portion of the transmission mechanism 11 is located within the drive component 1. The drive component 1 is driveably connected to the valve stem 3 through the transmission mechanism 11. The transmission mechanism 11 is provided to increase the torque output by the motor of the drive component 1, which is then transmitted to the valve stem 3, and the valve stem 3 drives the valve core 4 to rotate. Of course, as another implementation, when the torque output by the motor is sufficient to drive the valve core 4, the drive component 1 may not include the transmission mechanism 11.

[0026] See Figure 2 and Figure 3The valve body component 2 includes a first valve body 21 and a second valve body 22. The first valve body 21 and the second valve body 22 are fixedly connected. In this embodiment, the first valve body 21 and the second valve body 22 are fixedly connected by welding. Of course, in other embodiments, the first valve body 21 and the second valve body 22 can also be fixedly connected by screws, adhesive, interference fit, or snap fasteners. See also Figure 3 The first valve body 21 includes a first interface portion 211, a first support frame 212, and a bottom wall 213. Along the axial direction of the first interface portion 211, the first interface portion 211 and the first support frame 212 are located at opposite ends of the bottom wall 213. The first interface portion 211 extends perpendicular to the bottom wall 213 and away from it. The first support frame 212 extends perpendicular to the bottom wall 213 and in the opposite direction to the extension direction of the first interface portion 211. There are multiple first support frames 212; in this embodiment, there are four. However, in other embodiments, the number of first support frames 212 can also be different. The first support frame 212 includes a first recessed surface 2121, which is formed by recessing from the free end face of the first support frame 212 inwards perpendicular to the bottom wall 213. In this embodiment, the first recessed surface 2121 is a semi-circular arc surface; however, in other embodiments, the first recessed surface 2121 can also have other shapes. The first interface portion 211 has a first interface channel 211'. The first valve body 21 can be formed by injection molding of plastic material, such as polyamide (PA) material, polyphthalamide (PPA) material, or nylon material, etc.

[0027] See Figure 2 and Figure 4The second valve body 22 includes a side wall 221 with multiple wall surfaces and multiple interface portions for communicating with the outside. Specifically, in this embodiment, the second valve body 22 includes three interface portions: a second interface portion 222, a third interface portion 223, and a fourth interface portion 224. Each of the three interface portions extends away from the outer side surface along the outer side surface of different wall surfaces perpendicular to the side wall 221. The three interface portions are located at the same height position or tend to be at the same height position of the second valve body 22. In this embodiment, the central axis of the second interface portion 222 coincides with or tends to coincide with the central axis of the fourth interface portion 224, the central axis of the third interface portion 223 is perpendicular to or tends to be perpendicular to the central axis of the second interface portion 222, and the central axis of the third interface portion 223 is perpendicular to or tends to be perpendicular to the central axis of the fourth interface portion 224. The second valve body 22 has a first cavity 225, and the three interface parts each have three corresponding interface channels. Specifically, the second interface part 222 has a second interface channel 222', the third interface part 223 has a third interface channel 223', and the fourth interface part 224 has a fourth interface channel 224'. As far as the second valve body 22 is concerned, the three interface channels of the second valve body are respectively connected to the first cavity 225.

[0028] See Figure 4 The second valve body 22 also includes a stop portion 226 and a second support frame 227. The stop portion 226 is used to limit the rotation angle of the valve core 4. The number of second support frames 227 is equal to the number of first support frames 212. Specifically, the number of second support frames 227 can be set to be equal to the number of wall surfaces of the side wall 221, or the number of second support frames 227 can be at least equal to the number of interface portions on the second valve body. The second support frames 227 are located in the first cavity 225. Each of the second support frames 227 extends away from the inner side surface of a different wall surface perpendicular to the side wall 210. The second support frame 227 includes a second recessed surface 2271, which is formed by recessing from the free end face of the second support frame 227 inward along the side wall 221. In this embodiment, the second recessed surface 2271 is a semi-circular arc surface. Of course, in other embodiments, the second recessed surface 2271 can also be other shapes. The second valve body 22 can be formed by injection molding of plastic material, such as polyamide (PA) material, polyphthalamide (PPA) material, or nylon material, etc.

[0029] See Figures 2 to 5When the first valve body 21 and the second valve body 22 are assembled, the first support frame 212 extends into the first cavity 225, and the bottom wall 213 of the first valve body abuts against the side wall 221 of the second valve body, specifically against the free end of the side wall 221. The bottom wall 213 and the side wall 221 are fixedly connected by welding at the abutment point, thereby realizing the fixed connection between the first valve body 21 and the second valve body 22. The first valve body 21 and the second valve body 22 are assembled to form the valve body cavity 20. As far as the valve body component 2 is concerned, the four interface channels are respectively connected to the valve body cavity 20, and the central axis of the first interface portion 211 on the first valve body is perpendicular or tends to be perpendicular to the plane containing the central axes of the three interface portions on the second valve body. During the welding process of sidewall 221 and bottom wall 213, the free end portion of sidewall 221 melts, causing a slight decrease in the height of sidewall 211, thereby bringing the first support frame 212 and the second support frame 227 into contact. At this time, the first recessed surface 2121 of the first support frame 212 and the second recessed surface 2271 of the second support frame 227 are assembled to form a receiving portion 214, which forms a receiving cavity 215. In this embodiment, since both the first recessed surface 2121 and the second recessed surface 2271 are semi-circular arc surfaces, the formed receiving portion 214 is a cylindrical cavity. Of course, in other embodiments, the receiving portion 214 can also be other shapes.

[0030] See Figure 2 , Figures 6 to 9 The valve body component 2 also includes a valve core seat 23 and a first seal 24. The number of valve core seats 23 and the number of first seals 24 are equal, and at least the number of valve core seats 23 is equal to the number of interface portions on the second valve body. The valve core seat 23 includes an inner peripheral surface 231 and an outer peripheral surface 232. The valve core seat 23 has a first through hole 233 that penetrates the valve core seat 23 and is used to communicate with an interface channel. The outer peripheral surface 232 includes a first surface 2321 and a second surface 2322, which are connected. The inner peripheral surface 231 includes a third surface 2314 and a fourth surface 2315, which are connected. A plane is defined, which can be a cross-section passing through the central axis of the first through hole 233. This plane can be, for example, a cross-section passing through the central axis of the first through hole 233. Figure 7The projection of the second surface 2322 onto the plane of the cross-section shown is parallel or nearly parallel to the central axis of the first through hole 233. In this embodiment, the extension line of the projection of the first surface 2321 onto the plane is also perpendicular or nearly perpendicular to the central axis of the first through hole 233. The projection of the fourth surface 2315 onto the plane is parallel or nearly parallel to the central axis of the first through hole 233. The first sealing member 24 can be an annular sealing member. The first sealing member 24 includes a main body 241, a first protrusion 242, and a second protrusion 243. The main body 241 includes an outer peripheral side and an inner peripheral side. Along the radial direction of the main body 241, the first protrusion 242 protrudes inward from the inner peripheral side of the main body 241. The first protrusion 242 can be evenly distributed circumferentially along the inner peripheral side. Correspondingly, the second protrusion 243 protrudes outward from the outer peripheral side of the main body 241. The second protrusion 243 can be evenly distributed circumferentially along the outer peripheral side. In this embodiment, the first protrusion 242 and the second protrusion 243 may also be symmetrically distributed relative to the main body 241 along the radial direction of the main body 241. Providing the first protrusion 242 and the second protrusion 243 helps to prevent the first seal 24 from falling off when installed into the receiving cavity 224.

[0031] See Figure 2 , Figures 5 to 9At least a portion of the valve core seat 23 is located in the receiving cavity 215. The valve core seat 23 is supported by the receiving portion 214. The first seal 24 is located on the outer periphery of the second surface 2322. The first seal 24 is located in the receiving cavity 215. The first protrusion 242 abuts against the second surface 2322 of the outer peripheral surface 232. The second protrusion 243 abuts against the receiving portion 214. Along the radial direction of the receiving portion 214, the main body 241 is located between the first protrusion 242 and the second protrusion 243. The seal 24 is pressed between the receiving portion 214 and the second surface 2322 by the first protrusion 242 and the second protrusion 243. Along the axial direction of the receiving portion 214, one end of the main body 241 of the first seal 24 abuts against the first surface 2321 of the outer peripheral surface 232, and the other end of the main body 241 abuts against the side wall 221 of the second valve body 22. The first seal 24 is pressed between the first surface 2321 and the side wall 221, and the first seal 24 is in a sealed and pressed state. In this embodiment, the main body 241 of the first seal 24 also includes annular protruding ribs. The protruding ribs are formed by protruding outwards from both ends along the axial direction of the main body. Specifically, the protruding ribs include a first protruding rib 244, a second protruding rib 245, a third protruding rib 246, and a fourth protruding rib 247. The first protruding rib 244 and the second protruding rib 245 are located at the same end of the main body 241, and the third protruding rib 246 and the fourth protruding rib 247 are located at the other end of the same main body 241. Along the axial direction of the receiving portion 214, the first protruding rib 244 and the second protruding rib 245 abut against the first surface 2321, respectively, and the third protruding rib 246 and the fourth protruding rib 247 abut against the side wall 221, respectively. The first sealing member 24 is pressed between the first surface 2321 and the side wall 221 by the protruding ribs, and the first sealing member 24 is in a sealed and pressed state. By providing the first protrusion and the second protrusion, the first sealing member 24 and the valve core seat 23 can be better installed in the receiving cavity 215, which helps to prevent them from falling off. In addition, the first protrusion 242 and the second protrusion 243 can also keep the protruding ribs or the main body in the center, so that the protruding ribs or the main body can be fully pressed against the first surface 2321 and the side wall 221, respectively, which helps to improve the sealing performance of the electric valve and reduce the risk of internal leakage.

[0032] See Figure 2 , Figure 6 , Figure 7 , Figure 10 as well as Figure 11In this embodiment, the valve core 4 is a spherical valve core, which includes a spherical surface, an upper end surface, and a lower end surface. The spherical surface is the outer surface of the valve core 4. The end surface of the valve core 4 closest to the valve stem 3 is defined as the upper end surface, and the end surface of the valve core 4 furthest from the valve stem 3 is defined as the lower end surface. The valve core 4 is located in the valve body cavity 20. The third surface 2314 also includes an arcuate surface 2311. Under the elastic force of the first sealing member in the compressed state, as the valve core 4 rotates, at least a portion of the spherical surface of the valve core 4 can be tightly fitted with the arcuate surface 2311. The valve core 4 can slide with the arcuate surface 2311, and the valve core seat 23 supports and seals the valve core 4 through the arcuate surface 2311. In this embodiment, the valve core seat 23 further includes an annular groove 2312. The groove 2312 is formed by recessing from the arc-shaped surface 2311 into the interior of the valve core seat 23. The groove 2312 facilitates the entry of impurities in the working fluid or wear particles that fall off due to frequent sliding friction between the valve core 4 and the arc-shaped surface 2311 into the cavity formed by the groove 2312. This avoids the risk of impurities or wear particles being located on the arc-shaped surface 2311, causing a loose seal between the valve core 4 and the arc-shaped surface 2311 and resulting in internal leakage. In this embodiment, the groove 2312 includes an annular inclined surface 2313, defining a plane. This plane can be a cross-section passing through the central axis of the valve core seat 23. This plane can be, for example, a cross-section of, the central axis of the valve core seat 23. Figure 7 The projection of the annular inclined surface 2313 onto the plane of the cross-section shown forms an angle θ with the projection of the straight portion of the third surface 2314 onto the plane. The angle θ can generally be set within the range of 110° to 130°. The groove 2312, including the annular inclined surface 2313, allows for a smooth transition when the opening of the valve core 4 slides against the arc-shaped surface 2311. The valve core seat 23 can be injection molded from a hard, wear-resistant resin material such as polyvinylidene fluoride (PVDF), while the first seal 24 can be injection molded from a soft rubber material such as ethylene propylene diene monomer (EPDM).

[0033] See Figure 2 , Figure 10 as well as Figure 12 The valve core 4 includes a flow guide channel 41 that extends through the valve core 4. The flow guide channel 41 has a first opening 411 and a second opening 412. The first opening 411 is located on the spherical surface of the valve core 4, and the second opening 412 is located on the lower end face of the valve core 4. As the valve core 4 rotates, the first interface channel 211' remains in communication with the flow guide channel 41. A plane is defined that is perpendicular to the central axis of the valve core 4. This plane can be, for example,... Figure 12The plane containing the cross-section shown has an angle α formed between the projection of the first opening 411 onto the plane and the center of the projection of the spherical surface onto the plane. The endpoint where the projections of the arcuate surface and the fourth surface intersect on the plane is defined as the outer endpoint. The outer endpoints of the projections of the two arcuate surfaces sealing the first opening 411 onto the plane form an angle β with the center of the circle. The outer endpoints of the projections of two adjacent arcuate surfaces onto the plane form an angle γ with the center of the circle. These three satisfy the relationship: β > α > γ. Thus, by rotating the valve core 4, the first interface channel 211' can be connected to one or two of the three interface channels (222', 223', 224') located in the second valve body 22 via the flow guide channel 41. In this embodiment, specifically, the angle α can be set to a range of 70° to 100°. The angle of the first opening 411 can be determined according to the flow curve required by the actual application. See also... Figure 2 , Figure 3 as well as Figure 5 In this embodiment, the first interface portion 211 further includes a protrusion 2111 extending axially along the first interface portion. The protrusion 2111 and the first support frame 212 are located on the same side of the bottom wall 213. The second opening 412 is located on the outer periphery of the protrusion 2111. At least part of the protrusion 2111 is located in the flow channel of the valve core. The protrusion 2111 can abut against the wall surface forming the flow channel 41. The protrusion 2111 is provided to position the valve core 4 in the valve body cavity 20, which helps to prevent the valve core 4 from shaking when rotating. In addition, the second opening 412 is located on the outer periphery of the protrusion 2111, which can ensure the straight connection between the flow channel 41 and the first interface channel 211.

[0034] See Figure 4 and Figure 10 The valve core 4 also includes a limiting part 42. During rotation, the limiting part 42 can abut against the stop part 226 of the second valve body, thereby limiting the angle through which the valve core 4 rotates. In this embodiment, the valve core 4 can rotate between 0° and 180°. Of course, in other embodiments, the angle through which the valve core 4 can rotate can be other ranges. The valve core 4 can be formed by injection molding of plastic material, such as nylon or polyphenylene sulfide (PPS) material.

[0035] See Figures 12 to 16 In this embodiment, the electric valve 100 has 5 operating modes, specifically:

[0036] See Figure 12 The first working mode is defined as follows: the angle through which the valve core 4 rotates is 0°. At this time, the first interface channel 211' is connected to the second interface channel 222' through the flow guide channel 41.

[0037] See Figure 13The second working mode is as follows: When the valve core 4 rotates counterclockwise by an angle of 15° to 75° as shown in the figure, the first interface channel 211' is simultaneously connected to the second interface channel 222' and the third interface channel 223' through the flow guide channel 41. During the process of the valve core 4 rotating from 15° to 75°, the conduction area between the flow guide channel 41 and the second interface channel 222' gradually decreases, and the conduction area between the flow guide channel 41 and the third interface channel 223' gradually increases. When the valve core 4 rotates 45°, the conduction area between the flow guide channel 41 and the second interface channel 222' is equal to the conduction area between the flow guide channel 41 and the third interface channel 223'. That is, by rotating the valve core 4 to different angles, the conduction areas of the second interface channel 222' and the third interface channel 223' with the flow guide channel 41 can be proportionally adjusted.

[0038] See Figure 14 The third working mode is when the valve core 4 rotates to an angle of 90°, the first interface channel 211' is connected to the third interface channel 223' through the flow guide channel 41.

[0039] See Figure 15 The fourth working mode is as follows: When the valve core 4 rotates to an angle of 105° to 165°, the first interface channel 211' is connected to the third interface channel 223' and the fourth interface channel 224' respectively through the guide channel 41. During the process of the valve core 4 rotating from 105° to 165°, the conduction area between the guide channel 41 and the third interface channel 223' gradually decreases, and the conduction area between the guide channel 41 and the fourth interface channel 224' gradually increases. When the valve core 4 rotates to 135°, the conduction area between the guide channel 41 and the third interface channel 223' is equal to the conduction area between the guide channel 41 and the fourth interface channel 224'. Similarly, the conduction areas between the third interface channel 223' and the fourth interface channel 224' and the guide channel 41 can be proportionally adjusted by rotating the valve core 4 to different angles.

[0040] See Figure 16 In the fifth working mode, when the valve core 4 rotates to an angle of 180°, the first interface channel 211' is connected to the fourth interface channel 224' through the flow guide channel 41.

[0041] The order of the above operating modes is not restricted; different operating modes can be switched directly by rotating the valve core 4. Furthermore, the above embodiment illustrates a four-way valve, but it is not limited to the illustrated four-way valve. The electric valve can also be a five-way valve or other multi-way valves. Specifically, the electric valve can be defined to have N interface channels, where N≥4 and N is an integer. The interface channels include a first interface channel. The valve core has a flow guiding channel, and the first interface channel is always connected to the flow guiding channel. By setting the first opening angle of the valve core and rotating the valve core, the first interface channel can be connected to one or two of the remaining interface channels through the flow guiding channel.

[0042] It should be noted that the above embodiments are only used to illustrate this application and are not intended to limit the technical solutions described in this application. For example, the directional definitions such as "front", "back", "left", "right", "up", "down", "inner", and "outer" are not limited. Although this specification has described this application in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to this application. All technical solutions and improvements that do not depart from the spirit and scope of this application should be covered within the scope of the claims of this application.

Claims

1. An electric valve, comprising a valve body component, a valve core, a valve core seat, and a first sealing element, wherein the valve body component has a valve body cavity, and the valve core is located in the valve body cavity, characterized in that: The valve body component includes a receiving portion forming a receiving cavity. The first sealing member includes a first protrusion, a second protrusion, and a main body portion. The valve core seat includes an inner peripheral surface and an outer peripheral surface. The outer peripheral surface includes a first surface and a second surface. The first surface is connected to the second surface. At least a portion of the valve core seat is located in the receiving cavity. The first sealing member is located in the receiving cavity and is located on the outer periphery of the second surface. Along the radial direction of the receiving portion, the main body portion is located between the first protrusion and the second protrusion, the first protrusion abuts against the second surface, the second protrusion abuts against the receiving portion, and the first seal is pressed between the receiving portion and the second surface by the first protrusion and the second protrusion; along the axial direction of the receiving portion, one end of the main body portion abuts against the first surface, and the other end of the main body portion abuts against the side wall of the valve body component, and the first seal is pressed between the first surface and the side wall of the valve body component; at least a portion of the outer surface of the valve core is in close contact with a portion of the inner circumferential surface.

2. The electric valve according to claim 1, characterized in that: The valve core seat also has a first through hole, which penetrates the valve core seat, and the inner peripheral surface includes a third surface and a fourth surface, with the third surface connected to the fourth surface. Define a plane, which is a plane passing through the central axis of the first through hole. The projection of the second surface on the plane is parallel to or nearly parallel to the central axis of the first through hole. The projection of the fourth surface on the plane is parallel to or nearly parallel to the central axis of the first through hole.

3. The electric valve according to claim 2, characterized in that: The third surface includes an arc-shaped surface, and the valve core seat also includes a groove. The groove is formed by recessing from the arc-shaped surface into the valve core seat, and at least a portion of the outer surface of the valve core is in close contact with the arc-shaped surface.

4. The electric valve according to claim 3, characterized in that: The groove includes an annular inclined surface, defining a plane that passes through the central axis of the valve core seat. The projection of the annular inclined surface onto the plane and the projection of the straight portion of the third surface onto the plane form an angle θ, the angle θ being in the range of 110° to 130°.

5. The electric valve according to claim 4, characterized in that: The main body also includes protruding ribs, which protrude outward from both ends of the main body in the axial direction. The protruding ribs include a first protruding rib, a second protruding rib, a third protruding rib, and a fourth protruding rib. The first protruding rib and the second protruding rib are located at the same end of the main body, and the third protruding rib and the fourth protruding rib are located at the same other end of the main body. Along the axial direction of the receiving portion, the first protruding rib and the second protruding rib abut against the first surface, and the third protruding rib and the fourth protruding rib abut against the side wall of the valve body component, and the first sealing member is pressed between the first surface and the side wall of the valve body component by the protruding ribs.

6. The electric valve according to any one of claims 1-5, characterized in that: The main body includes an outer peripheral side and an inner peripheral side. Along the radial direction of the main body, the first protrusion protrudes inward from the inner peripheral side and is evenly distributed along the inner peripheral side. The second protrusion protrudes outward from the outer peripheral side and is evenly distributed along the outer peripheral side. The first protrusion and the second protrusion are symmetrically distributed with respect to the main body.

7. The electric valve according to claim 6, characterized in that: The valve body component includes a first valve body and a second valve body, which are fixedly connected. The first valve body includes a first support frame, and the second valve body includes a second support frame. The second valve body has a first cavity, and the first support frame is located in the first cavity. The first support frame abuts against the second support frame, and the first support frame and the second support frame are assembled to form the receiving portion.

8. The electric valve according to claim 7, characterized in that: The first valve body further includes a bottom wall, and the second valve body further includes a side wall, the side wall including a plurality of wall surfaces, the first support frame extending in a direction perpendicular to the bottom wall away from the bottom wall, and each of the second support frames extending in a direction away from the inner surface perpendicular to the inner surface of a different wall surface; The first support frame includes a first recessed surface, which is recessed from the free end face of the first support frame inward along a direction perpendicular to the bottom wall. The second support frame includes a second recessed surface, which is recessed from the free end face of the second support frame inward along a direction parallel to the side wall. The first recessed surface and the second recessed surface are assembled to form the receiving portion.

9. The electric valve according to claim 8, characterized in that: The first recessed surface is a semi-circular arc surface, the second recessed surface is a semi-circular arc surface, and the receiving part formed by assembling the first recessed surface and the second recessed surface is a cylindrical cavity; The first valve body and the second valve body are integrally formed by injection molding, the valve core seat is integrally formed by injection molding of a hard resin material, and the first sealing element is integrally formed by injection molding of a soft rubber material.

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