An electric valve

Abstract

This application provides an electric valve. The rotor assembly of the electric valve can drive a rod component to rotate circumferentially, and the rod component is threadedly engaged with the valve core assembly. The electric valve includes a valve seat assembly and an anti-rotation structure. The anti-rotation structure is formed by stamping or injection molding. At least part of the anti-rotation structure is located in the inner cavity formed by the valve seat assembly. The anti-rotation structure is fixedly connected or limited to the valve seat assembly. The anti-rotation structure has a first anti-rotation part, and the valve core assembly can cooperate with the first anti-rotation part to restrict the circumferential rotation of the valve core assembly relative to the first anti-rotation part. With this configuration, the anti-rotation structure is formed by stamping or injection molding and then fixedly connected or limited to the valve seat assembly. The anti-rotation structure itself is relatively simple to process and install, and its weight is relatively light. Compared with the anti-rotation structure being integrally machined from the valve seat assembly, the amount of machining of the valve seat assembly can be reduced, the structure of the valve seat assembly can be simplified, the machining time and material waste of the valve seat assembly can be reduced, and the weight and cost of the electric valve can be reduced.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, specifically to an electric valve for an automotive thermal management system. Background Technology

[0002] In related technologies, electric valves include rotor assemblies, valve core assemblies, and rod components. The rotor assembly drives the rod component to rotate circumferentially, and the rod component drives the valve core assembly to move axially. The valve seat assembly has two anti-rotation grooves machined on its inner circumferential wall. These anti-rotation grooves restrict the rotation of the valve core assembly in the circumferential direction, allowing the valve core assembly to move only axially. This design makes the machining of the anti-rotation grooves relatively time-consuming, energy-intensive, and also leads to material waste. Summary of the Invention

[0003] The purpose of this application is to provide an electric valve that simplifies the structure of the valve seat assembly and reduces material waste.

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

[0005] An electric valve includes a rotor assembly, a valve core assembly, and a rod component. The rotor assembly is capable of driving the rod component to rotate circumferentially, and the rod component is threadedly engaged with the valve core assembly. The electric valve further includes a valve seat assembly and an anti-rotation structure. The anti-rotation structure is formed by stamping or injection molding, and at least a portion of the anti-rotation structure is located within the cavity formed by the valve seat assembly. The anti-rotation structure is fixedly connected or limitedly connected to the valve seat assembly. The anti-rotation structure has a first anti-rotation part, and the valve core assembly is capable of cooperating with the first anti-rotation part to restrict the circumferential rotation of the valve core assembly relative to the first anti-rotation part.

[0006] In one technical solution provided in this application, the electric valve includes a rotor assembly, a valve core assembly, and a rod component. The rotor assembly can drive the rod component to rotate circumferentially, and the rod component is threadedly engaged with the valve core assembly. The electric valve also includes a valve seat assembly and an anti-rotation structure. The anti-rotation structure is formed by stamping or injection molding, and at least part of the anti-rotation structure is located in the inner cavity formed by the valve seat assembly. The anti-rotation structure is fixedly connected or limited to the valve seat assembly. The anti-rotation structure has a first anti-rotation part, and the valve core assembly can cooperate with the first anti-rotation part to restrict the circumferential rotation of the valve core assembly relative to the first anti-rotation part. With this configuration, the anti-rotation structure is formed by stamping or injection molding and then fixedly connected or limited to the valve seat assembly. The anti-rotation structure itself is relatively simple to process and install, and its weight is relatively light. Compared to the anti-rotation structure being integrally machined from the valve seat assembly, the amount of machining of the valve seat assembly can be reduced, the structure of the valve seat assembly can be simplified, the machining time and material waste of the valve seat assembly can be reduced, and the weight and cost of the electric valve can be reduced.

[0007] An electric valve includes a rotor assembly, a valve core assembly, and a rod component. The rotor assembly is capable of driving the rod component to rotate circumferentially, and the rod component is threadedly engaged with the valve core assembly. The electric valve also includes a valve seat assembly and an anti-rotation structure. The anti-rotation structure is formed by stamping or injection molding. At least a portion of the anti-rotation structure is located within the cavity formed by the valve seat assembly. The anti-rotation structure is fixedly connected or limitedly connected to the valve seat assembly. The anti-rotation structure is a non-standard circular structure. The valve core assembly is capable of cooperating with the anti-rotation structure. At least a portion of the valve core assembly can abut against the anti-rotation structure circumferentially, and the anti-rotation structure can restrict the circumferential rotation of the valve core assembly.

[0008] In one technical solution provided in this application, the electric valve includes a rotor assembly, a valve core assembly, and a rod component. The rotor assembly can drive the rod component to rotate circumferentially, and the rod component is threadedly engaged with the valve core assembly. The electric valve also includes a valve seat assembly and an anti-rotation structure. The anti-rotation structure is formed by stamping or injection molding, and at least part of the anti-rotation structure is located in the inner cavity formed by the valve seat assembly. The anti-rotation structure is fixedly connected or limitedly connected to the valve seat assembly. The anti-rotation structure is a non-standard circular structure, and the valve core assembly can mate with the anti-rotation structure. The valve core assembly has a non-standard circular structure that mates with the anti-rotation structure. At least a portion of the valve core assembly can abut against the anti-rotation structure in the circumferential direction. The anti-rotation structure restricts the circumferential rotation of the valve core assembly. The anti-rotation structure is formed by stamping or injection molding and then fixedly or limitingly connected to the valve seat assembly. The anti-rotation structure itself is relatively simple to process and install, and its weight is relatively light. Compared with the anti-rotation structure being integrally machined from the valve seat assembly, the amount of machining of the valve seat assembly can be reduced, the structure of the valve seat assembly can be simplified, the machining time and material waste of the valve seat assembly can be reduced, and it is also beneficial to reduce the weight and cost of the electric valve. Attached Figure Description

[0009] Figure 1 This is a front view structural schematic diagram of the valve component provided in this application;

[0010] Figure 2 yes Figure 1 A cross-sectional view of the central valve component along plane AA;

[0011] Figure 3 yes Figure 2 A three-dimensional structural diagram of the anti-rotation structure of the central valve component;

[0012] Figure 4 yes Figure 2 A three-dimensional structural diagram of the sleeve portion of the central valve component;

[0013] Figure 5 yes Figure 4A cross-sectional view of the middle sleeve section;

[0014] Figure 6 yes Figure 2 A three-dimensional structural diagram of the valve seat portion of the intermediate valve component;

[0015] Figure 7 yes Figure 2 A three-dimensional structural diagram of the valve core assembly of the intermediate valve component. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the invention 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 merely illustrative and not intended to limit the invention.

[0017] Electric valves are widely used in automotive thermal management systems, such as vehicle air conditioning systems and vehicle battery cooling systems. Electric valves are generally used as throttling or switching elements. An electric valve includes a valve component 1, a coil assembly (not shown in the figure), and a valve body (not shown in the figure). The coil assembly is located on the outer periphery of the valve component 1, and the two are fixedly connected or limited in their connection. Furthermore, a sealing device exists between the coil assembly and the valve component 1 to prevent moisture or other impurities from entering the gap between the coil assembly and the valve component 1, causing corrosion or failure of the component. The electric valve is electrically and / or signal-connected to the outside world through the coil assembly. At least a portion of the valve component 1 is located within the cavity formed by the valve body. The valve component 1 is fixedly connected or limited in its connection to the valve body, and the connection method includes threaded connections, etc. The coil assembly and the valve body can be connected by screws; of course, in other embodiments, the coil assembly and the valve body can be connected by snap-fit ​​or other methods.

[0018] refer to Figures 1-7In the embodiments provided in this application, valve component 1 includes a rotor assembly 11, a valve seat assembly 12, a valve core assembly 13, a rod component 15, and a sleeve 18. The coil assembly includes a stator assembly (not shown in the figure), which is located on the outer periphery of the sleeve 18. The rotor assembly 11 is located in the inner cavity formed by the sleeve 18. The stator assembly drives the rotor assembly 11 to rotate. The rotor assembly 11 is fixedly connected to the rod component 15, and the connection method includes welding, snap-fit, etc. The rotor assembly 11 drives the rod component 15 to rotate circumferentially. The valve seat assembly 12 includes a valve seat upper cavity 12a, and part of the valve core assembly 13 is located in the valve seat upper cavity 12a. The valve core assembly 13 is threadedly engaged with the rod component 15. The rod component 15 can drive the valve core assembly 13 to move up and down along the axial direction of the valve component 1. The valve seat assembly 12 includes a valve port 122, and the valve core assembly 13 can cooperate with the valve port 122 to adjust the flow area of ​​the valve port 122, thereby adjusting the flow rate of the refrigerant through the valve port 122. The valve seat assembly 12 includes an inlet channel 123 and an outlet channel 124. The inlet channel 123 and the outlet channel 124 can be connected through the valve port of the valve port portion 122. Of course, the flow directions of the two can be opposite.

[0019] refer to Figures 2-7The valve component 1 includes an anti-rotation structure 14, which is formed by stamping or injection molding. Specifically, the anti-rotation structure 14 can be formed by stamping of metal material, such as stainless steel or copper, or it can be formed by injection molding of plastic material, such as polyetheretherketone (PEEK) or polyphenylene sulfide (PPS). At least part of the anti-rotation structure 14 is located in the inner cavity formed by the valve seat assembly 12, which can be the upper cavity 12a of the valve seat. The anti-rotation structure 14 is fixedly connected or limited to the valve seat assembly 12. The anti-rotation structure 14 has a first anti-rotation part 141, and the valve core assembly 13 can cooperate with the first anti-rotation part 141 to restrict the circumferential rotation of the valve core assembly 13 relative to the first anti-rotation part 141. The anti-rotation structure 14 is a non-standard circular structure. Here, the non-standard circular structure means that the cross-sectional shape of the anti-rotation structure 14 can be square, hexagonal, or an irregular circle or plum blossom shape with partial straight edges, etc., forming a non-standard circular structure. The valve core assembly 13 can cooperate with the anti-rotation structure 14. The valve core assembly 13 has a non-standard circular structure that cooperates with the anti-rotation structure 14. Here, the non-standard circular structure means that the valve core assembly 13 has a shape that cooperates with the anti-rotation structure 14. It can be a square, hexagonal, or an irregular circle or plum blossom shape with partial straight edges, etc., adapted to the anti-rotation structure 14. At least a part of the valve core assembly 13 can abut against the anti-rotation structure 14 in the circumferential direction. The anti-rotation structure 14 can restrict the circumferential rotation of the valve core assembly 13. In other embodiments, the first anti-rotation part 141a can be provided in the axial cooperation section between the anti-rotation structure 14 and the valve core assembly 13, and the other axial sections can be standard circular structures. This design not only restricts the circumferential rotation of the valve core assembly 13, but also ensures that the anti-rotation structure 14, formed by stamping or injection molding, is fixedly or limitedly connected to the valve seat assembly 12. The anti-rotation structure 14 itself is relatively simple to process and install, and its weight is relatively light. Compared with the existing technology of directly machining the anti-rotation part on the valve seat assembly 12 as a whole, it can reduce the amount of machining of the valve seat assembly 12, simplify the structure of the valve seat assembly 12, reduce the machining time and material waste of the valve seat assembly 12, and at the same time help to reduce the weight and cost of the electric valve.

[0020] Looking along the axial direction of the anti-rotation structure 14, the shape of the anti-rotation structure 14 includes square, waist groove, plum blossom, polygon, etc. The part of the valve core assembly 13 that mates with the anti-rotation structure 14 can be adapted to the anti-rotation structure 14, for example, it is a square, waist groove, plum blossom, or polygon adapted to the anti-rotation structure 14. Of course, the two can also be partially adapted in shape. In this embodiment, the anti-rotation structure 14 is approximately quincunx-shaped. Specifically, the first anti-rotation part 141a of the anti-rotation structure 14 is an axially extending groove 141a, and the number of extending grooves 141a is four. The four extending grooves 141a are symmetrically arranged. The valve core assembly 13 is provided with two symmetrically arranged protrusions 131a. The two protrusions 131a are respectively located in the two symmetrically arranged extending grooves 141a. At least part of the protrusions 131a can abut against the wall forming the extending groove 141a to ensure that the valve core assembly 13 can move axially relative to the anti-rotation structure 14. In other embodiments, the valve core assembly 13 can be provided with four symmetrically arranged protrusions, which are respectively limited by four symmetrically arranged extending grooves 141a. The anti-rotation structure 14 is formed by stamping stainless steel sheet metal. The valve seat assembly 12 has a receiving portion 1211. Viewed along the axial direction of the valve seat assembly 12, the shape of the receiving portion 1211 is circular. Of course, in other embodiments, the shape of the receiving portion 1211 can also be other feasible shapes. The receiving portion 1211 has a receiving groove 1211c. At least part of the anti-rotation structure 14 is located in the receiving groove 1211c. The receiving portion 1211 includes a bottom wall 1211a and a side wall 1211b. The lower end face of the anti-rotation structure 14 abuts against the bottom wall 1211a of the receiving portion. The anti-rotation structure 14 is press-fitted with the side wall 1211b of the receiving portion. This arrangement can ensure that the anti-rotation structure 14 will not rotate circumferentially relative to the valve seat assembly 12, which can facilitate the assembly of the anti-rotation structure 14, has strong practicality, and can also reduce the weight of the valve seat assembly 12. In other embodiments, the anti-rotation structure 14 may be welded to the valve seat assembly 12, or the anti-rotation structure 14 may be welded to the receiving sidewall 1211b after an interference fit.

[0021] For details, please refer to Figures 2-7The valve core assembly 13 includes a second anti-rotation portion 131, which can cooperate with a first anti-rotation portion 141 to achieve axial movement of the second anti-rotation portion 131 relative to the first anti-rotation portion 141. In this embodiment, the first anti-rotation portion 141 is an extended groove 141a along the axial direction of the anti-rotation structure 14, and the second anti-rotation portion 131 is located radially outward of the valve core assembly 13. The extended groove 141a of the first anti-rotation portion 141 restricts the circumferential rotation of the second anti-rotation portion 131. In other embodiments, the anti-rotation structure 14 includes a peripheral wall portion 142, the first anti-rotation portion 141 protrudes radially inward from the peripheral wall portion 142, the second anti-rotation portion 131 has a groove along the axial direction of the valve core assembly 13, the first anti-rotation portion 141 is located in the groove, and the first anti-rotation portion 141 ensures the axial movement of the groove.

[0022] Furthermore, the valve component 1 also includes a sleeve portion 16 and a bearing assembly 17. The sleeve portion 16 can be formed by stamping. In this embodiment, the sleeve portion 16 is formed by stamping stainless steel sheet metal. The sleeve portion 16 is located in the inner cavity formed by the rotor assembly 11 and is located on the upper side of the anti-rotation structure 14. The sleeve portion 16 is fixedly installed. The bearing assembly 17 is located in the inner cavity of the sleeve portion 16. The bearing assembly 17 includes an inner bearing ring 171 and an outer bearing ring 172. In this embodiment, the outer bearing ring 172 is connected to the sleeve portion 16. Specifically, the sleeve portion 16 has a positioning step 161 and a positioning platform. Step 161 can be integrally stamped with sleeve part 16 or separately formed and then fixedly connected. Positioning step 161 includes positioning step top wall 1611. The upper end face of bearing outer ring 172 abuts against positioning step top wall 1611, and the lower end face of bearing outer ring 172 abuts against the upper end face of anti-rotation structure 14. Bearing assembly 17 is pressed and fixed between positioning step top wall 1611 and the upper end face of anti-rotation structure 14 by fixing sleeve part 16. This setting can reduce the processing and assembly process, ensure the installation reliability of bearing assembly 17, and also reduce the overall weight of electric valve. In other embodiments, the bearing outer ring 172 can be fixed to the sleeve portion 16 by interference fit or welding. Specifically, the positioning step 161 also includes a positioning step sidewall 1612, and the outer peripheral wall of the bearing outer ring 172 is fixed to the positioning step sidewall 1612 by interference fit. Alternatively, the sleeve portion 16 has a through hole 16a, which is located on the outer side or upper side of the bearing outer ring 172. The through hole 16a penetrates part of the peripheral wall of the sleeve portion 16. The number of through holes 16a includes two or more, and the through holes 16a are evenly distributed along the circumference of the sleeve portion 16. The evenly distributed distribution here includes a roughly evenly distributed distribution. Alternatively, one of the two through holes 16a is located on the upper side of the bearing outer ring 172, and the other is located on the outer side of the bearing outer ring 172. The bearing outer ring 172 and the sleeve portion 16 are fixed by welding through the through hole 16a. The weld is located between the periphery of the through hole 16a and the bearing outer ring 172, which can ensure the reliability of the bearing assembly 17 installation. The valve seat assembly 12 includes a valve seat portion 121, a receiving portion 1211, and a valve seat upper cavity 12a located in the valve seat portion 121. In other embodiments, the bearing assembly 17 can be directly fixedly connected to the valve seat assembly 12. Specifically, the valve seat assembly 12 includes a bearing fixing portion, at least a portion of the bearing assembly 17 is located in the inner cavity formed by the bearing fixing portion, the lower end face of the bearing outer ring 172 abuts against the lower end face of the bearing fixing portion, and the outer peripheral surface of the bearing outer ring 172 is interference-fitted with the inner peripheral surface of the bearing fixing portion. Alternatively, the bearing assembly 17 can be welded to the valve seat assembly 12, or the bearing assembly 17 can be riveted to the valve seat assembly 12. This can further reduce the weight of the valve seat assembly 12, reduce material waste, and at the same time reduce the overall weight and cost of the electric valve.

[0023] The bearing inner ring 171 is fixedly connected or limited to the rod component 15. In this embodiment, the rod component 15 includes a first part 151, a second part 152, and a third part 153. The third part 153 protrudes outward along the radial direction of the second part 152. The outer diameter of the first part 151 is larger than the outer diameter of the second part 152. The bearing inner ring 171 of the bearing assembly 17 is located on the outer periphery of the second part 152. The bearing inner ring 171 and the second part 152 are interference-fitted or transition-fitted. The bearing inner ring 171 is located between the first part 151 and the third part 153 in the axial direction. The first part 151 and the rod component 15 are separately formed. It is necessary to first abut the lower end face of the bearing assembly 17 with the upper end face of the third part 153. The first part 151 can be a structure similar to a gasket. The first part 151 is welded and fixed to the rod component 15, or the first part 151 is a retaining spring. The first part 151 is fixed by the groove provided on the rod component 15. The sleeve portion 16 also includes a small-diameter guide portion 162, which is located at the upper end of the sleeve portion 16. The small-diameter guide portion 162 can be integrally stamped with the sleeve portion 16 or separately formed and then fixed. The rod component 15 passes through the small-diameter guide portion 162, and the rod component 15 is guided and engaged with the small-diameter guide portion 162. Specifically, the guiding engagement here can be a clearance engagement. The outer diameter of the small-diameter guide portion 162 is smaller than the outer diameter of the positioning step 161, which can save materials and reduce material waste.

[0024] refer to Figures 2-7 In this embodiment, the sleeve portion 16 and the anti-rotation structure 17 are respectively connected to the valve seat assembly 12. Part of the sleeve portion 16 is located in the inner cavity 12a of the valve seat. Specifically, the valve seat assembly 12 includes a stepped portion 1212, which is located in the valve seat portion 121. The stepped portion 1212 includes a stepped side wall 1212a and a stepped bottom wall 1212b. The outer peripheral surface of the sleeve portion 16 is press-fitted with the stepped side wall 1212a. A certain space is reserved between the lower end surface of the sleeve portion 16 and the stepped bottom wall 1212a to ensure that the bearing assembly 17 is installed in place. In other embodiments, the sleeve portion 16 can be directly welded and fixed to the anti-rotation structure 14. Furthermore, the sleeve portion 16 can be fixed as an integral structure with the anti-rotation structure 14, and the aforementioned integral structure is then fixedly connected to the valve seat assembly 12. The sleeve portion 16 includes a mounting portion 163, which includes a mounting portion top wall 1631 and a mounting portion side wall 1632. The axial height of the mounting portion top wall 1631 is higher than the axial height of the lower end face of the bearing outer ring 172. At the same time, the inner diameter of the positioning step side wall 1612 is smaller than the inner diameter of the mounting portion side wall 1632. This ensures the installation of the bearing assembly 17 and the sleeve portion 16, so that the bearing assembly 17 abuts against the upper end face of the anti-rotation structure 14, further ensuring the reliable fixation of the bearing assembly 17. In other embodiments, the sleeve portion 16 can be welded and fixed to the anti-rotation structure 14.

[0025] In this embodiment, the valve core assembly 13 includes a nut 132 and a valve needle 133. The nut 132 and the valve needle 133 are fixed by injection molding. In this embodiment, the valve needle 133 is made of metal material, such as stainless steel, and the nut 133 is made of plastic. Of course, in other embodiments, the nut 132 and the valve needle 133 can also be integrally molded. The second anti-rotation part 131 is located radially outward of the nut part 132. The second anti-rotation part 131 is integrally injection molded with the nut part 132. The second anti-rotation part 131 protrudes radially outward from the nut part 132. The nut part 132 includes a main body part 1322 and an extension part 1321. The extension part 1321 extends upward along the axial direction of the main body part 1322. The extension part 1321 and part of the main body part 1322 constitute the second anti-rotation part 131. The main body part 1322 has an internal thread, and the rod part 15 has an external thread. The nut part 132 can be threadedly engaged with the rod part 15 for operation. The use of plastic material in the nut part 132 can increase wear resistance. The inner diameter of the extension 1321 is larger than the inner diameter of the third part 153 of the rod component 15. At the same time, the height difference between the upper end face of the extension 1321 and the main body 1322 is greater than the axial length of the third part 153. This arrangement can ensure that the upper end face of the extension 1321 can abut against the bearing assembly 17 to achieve stop, thus ensuring the reliability of the stop of the valve component 1. Valve component 1 has a balance channel 19 located on the central axis of valve core assembly 13. The balance channel 19 has an opening at the lower end of valve core assembly 13, which communicates with outlet channel 124. In this embodiment, valve core assembly 13 also includes a first balance hole 13a, which penetrates part of the outer side wall of valve core assembly 13. The first balance hole 13a connects the inner cavity formed by anti-rotation structure 14 with the balance channel 19. The inner cavity formed by anti-rotation structure 14 can communicate with the inner cavity formed by rotor assembly 11. Through the setting of balance channel 19 and first balance hole 13a, pressure balance between outlet channel 124 and inner cavity formed by rotor assembly 11 can be achieved, which helps to reduce valve opening resistance and thus reduce the driving force for valve component 1 operation.

[0026] The embodiments described above are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications without departing from the inventive concept, and these modifications all fall within the protection scope of this invention.

Claims

1. An electric valve, characterized in that, The electric valve includes a rotor assembly (11), a valve core assembly (13), and a rod component (15). The rotor assembly (11) can drive the rod component (15) to rotate circumferentially. The rod component (15) is threadedly engaged with the valve core assembly (13). The electric valve also includes a valve seat assembly (12) and an anti-rotation structure (14). The anti-rotation structure (14) is formed by stamping or injection molding. At least part of the anti-rotation structure (14) is located in the inner cavity formed by the valve seat assembly (12). The anti-rotation structure (14) is fixedly connected or limitedly connected to the valve seat assembly (12). The anti-rotation structure (14) has a first anti-rotation part (141). The valve core assembly (13) can cooperate with the first anti-rotation part (141) to restrict the circumferential rotation of the valve core assembly (13) relative to the first anti-rotation part (141).

2. An electric valve, characterized in that, The electric valve includes a rotor assembly (11), a valve core assembly (13), and a rod component (15). The rotor assembly (11) can drive the rod component (15) to rotate circumferentially. The rod component (15) is threadedly engaged with the valve core assembly (13). The electric valve also includes a valve seat assembly (12) and an anti-rotation structure (14). The anti-rotation structure (14) is formed by stamping or injection molding. At least a portion of the anti-rotation structure (14) is located in the inner cavity formed by the valve seat assembly (12). The structure (14) is fixedly connected or limited to the valve seat assembly (12). The anti-rotation structure (14) is a non-standard circular structure. The valve core assembly (13) can cooperate with the anti-rotation structure (14). The valve core assembly (13) has a non-standard circular structure that cooperates with the anti-rotation structure (14). At least a portion of the valve core assembly (13) can abut against the anti-rotation structure (14) in the circumferential direction. The anti-rotation structure (14) can restrict the circumferential rotation of the valve core assembly (13).

3. The electric valve according to claim 1, characterized in that, The anti-rotation structure (14) is a non-standard circular structure. The valve core assembly (13) can cooperate with the anti-rotation structure (14). The valve core assembly (13) has a non-standard circular structure that cooperates with the anti-rotation structure (14). At least a portion of the valve core assembly (13) can abut against the anti-rotation structure (14) in the circumferential direction. The anti-rotation structure (14) can restrict the circumferential rotation of the valve core assembly (13).

4. The electric valve according to any one of claims 1-3, characterized in that, The valve seat assembly (12) includes a receiving portion (1211) having a receiving groove (1211c), at least a portion of the anti-rotation structure (14) being located in the receiving groove (1211c), the receiving portion (1211) including a bottom wall (1211a) and a side wall (1211b), the lower end face of the anti-rotation structure (14) abutting against the bottom wall (1211a), the anti-rotation structure (14) being press-fitted with the side wall (1211b), and / or, the anti-rotation structure (14) being welded to the valve seat assembly (12).

5. The electric valve according to any one of claims 1-4, characterized in that, The electric valve also includes a sleeve portion (16) and a bearing assembly (17). The sleeve portion (16) is fixedly disposed, and the bearing assembly (17) is located in the inner cavity of the sleeve portion (16). The bearing assembly (17) includes an inner bearing ring (171) and an outer bearing ring (172). The outer bearing ring (172) is connected to the sleeve portion (16), and the inner bearing ring (171) is fixedly connected or limitedly connected to the rod component (15).

6. The electric valve according to claim 5, characterized in that, The rod component (15) includes a first part (151), a second part (152), and a third part (153). The third part (153) protrudes outward along the radial direction of the second part (152). The bearing inner ring (171) is located on the outer periphery of the second part (152). The bearing inner ring (171) is located between the first part (151) and the third part (153) in the axial direction. The sleeve part (16) has a positioning step (161). The positioning step (161) includes a positioning step top wall (1611). The upper end face of the bearing outer ring (172) abuts against the positioning step top wall (1611). The lower end face of the bearing outer ring (172) abuts against the upper end face of the anti-rotation structure (14).

7. The electric valve according to claim 5 or 6, characterized in that, The positioning step (161) includes a positioning step sidewall (1612), the outer peripheral wall of the bearing outer ring (172) and the positioning step sidewall (1612) are interference-fitted, and / or the bearing outer ring (172) is welded to the sleeve portion (16); the sleeve portion (16) also includes a small diameter guide portion (162), the small diameter guide portion (162) is located at the upper end of the sleeve portion (16), the rod component (15) passes through the small diameter guide portion (162), and the rod component (15) is guidedly fitted with the small diameter guide portion (162).

8. The electric valve according to claim 7, characterized in that, The sleeve portion (16) has a through hole (16a), which is located on the outside or upper side of the bearing outer ring (172). The bearing outer ring (172) and the sleeve portion (16) are welded and fixed through the through hole (16a), and the weld is located between the periphery of the through hole (16a) and the bearing outer ring (172).

9. The electric valve according to any one of claims 5-8, characterized in that, The sleeve portion (16) is located on the upper side of the anti-rotation structure (14), and the sleeve portion (16) and the anti-rotation structure (14) are respectively connected to the valve seat assembly (12); or, the sleeve portion (16) and the anti-rotation structure (14) are fixedly connected as an integral structure, and the integral structure is connected to the valve seat assembly (12). The sleeve portion (16) includes a mounting portion (163), the mounting portion (163) includes a mounting portion top wall (1631) and a mounting portion side wall (1632). The axial height of the mounting portion top wall (1631) is higher than the axial height of the lower end face of the bearing outer ring (172). The mounting portion side wall (1632) is fixed with the outer peripheral wall of the anti-rotation structure (14) by interference fit, or the sleeve portion (16) and the anti-rotation structure (14) are welded and fixed.

10. The electric valve according to claim 9, characterized in that, The valve seat assembly (12) includes a stepped portion (1212), a portion of the sleeve portion (16) is located in the inner cavity formed by the stepped portion (1212), the stepped portion (1212) includes a stepped portion sidewall (1212a), the outer peripheral surface of the sleeve portion (16) is press-fitted to the stepped portion sidewall (1212a), and / or the sleeve portion (16) is welded to the valve seat assembly (12).

11. The electric valve according to any one of claims 1-10, characterized in that, Viewed along the axial direction of the anti-rotation structure (14), the shape of the anti-rotation structure (14) includes square and plum blossom shape. The valve core assembly (13) includes a second anti-rotation part (131), which moves axially relative to the first anti-rotation part (141).

12. The electric valve according to claim 11, characterized in that, The first anti-rotation part (141) is an extended groove (141a) along the axial direction of the anti-rotation structure (14), and the second anti-rotation part (131) is located on the radially outer side of the valve core assembly (13). The second anti-rotation part (131) is provided to protrude radially outward from the valve core assembly (13), and the second anti-rotation part (131) is located in the extended groove (141a); or, the anti-rotation structure (14) includes a peripheral wall part (142), the first anti-rotation part (141) is provided to protrude radially inward from the peripheral wall part (142), and the second anti-rotation part (131) has a groove along the axial direction of the valve core assembly (13), and the first anti-rotation part (141) is located in the groove.

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