An electrically operated valve

Abstract

The utility model discloses an electric valve, including valve body subassembly and drive subassembly, valve body subassembly includes valve cover, its characterized in that, valve cover includes first surface and connecting portion, first surface is located on the upside of valve cover, and connecting portion is set up in convexity relative to first surface, drive subassembly includes cover body, and cover body and valve cover are steel material, and cover body and connecting portion weld fixedly, and connecting portion is annular, and connecting portion includes first step portion, and first step portion is located at the outer wall surface of connecting portion, and first step portion includes first step surface and the first step wall located above first step surface, and the lower end surface of cover body and first step surface abut. Through above -mentioned structural design, cover body and valve cover are steel material, and the connecting portion of valve cover has first step portion, and cover body and first step portion weld fixedly, and the step portion plays the positioning support effect, compared with background art, guarantees the leakproofness simultaneously, and the processing manufacturing cost of cover body is saved.

Description

Technical Field

[0001] This utility model relates to the field of flow path control technology for refrigeration systems, and in particular to an electric valve. Background Technology

[0002] In the background technology, the motor housing 001 of an electric valve is mainly connected to the valve body 002 via threaded connection or adhesive bonding. In these connection methods, adhesive bonding has low strength and sealing performance, while threaded connection requires machining threads on both the motor housing 001 and the valve body 002, resulting in significant material consumption during machining and the need to add a sealing ring 003 to prevent leakage, thus increasing manufacturing costs. Utility Model Content

[0003] To address the problems in the prior art, this utility model discloses an electric valve, including a valve body assembly and a drive assembly. The valve body assembly includes a valve cover, which has a first surface and a connecting portion. The first surface is located on the upper side of the valve cover, and the connecting portion protrudes relative to the first surface. The drive assembly includes a cover, which, along with the valve cover, is made of steel. The cover is welded to the connecting portion, which is annular and includes a first step. The first step is located on the outer wall of the connecting portion and includes a first step surface and a first step wall above the first step surface. The lower end face of the cover abuts against the first step surface. Through this structural design, both the cover and the valve cover are made of steel, and the connecting portion of the valve cover has a first step. The cover is welded to the first step, and the step serves as a positioning and support function. Compared to the prior art, the cover and the connecting portion do not require additional thread processing, and the thickness requirement of the cover is relatively low. While ensuring sealing performance, this design saves on the manufacturing cost of the cover. Attached Figure Description

[0004] In the accompanying drawings, shapes and dimensions may be enlarged for clarity, and the same reference numerals will be used in all figures to indicate the same or similar parts.

[0005] In the attached diagram:

[0006] Figure 1 This is a schematic diagram of the structure of an electric valve in the background art;

[0007] Figure 2 This is a schematic diagram of the overall structure of the electric valve of this utility model;

[0008] Figure 3 for Figure 2 Cross-sectional schematic diagram of the valve body assembly, sleeve, and drive assembly;

[0009] Figure 4 for Figure 3 Partial cross-sectional schematic diagram;

[0010] Figure 5 for Figure 4 An enlarged view of position A in the middle;

[0011] Figure 6 for Figure 4 An enlarged view of position B in the middle;

[0012] Figure 7 for Figure 6 An enlarged view of position C in the middle;

[0013] Figure 8 This is a schematic diagram of the motor connection plate in another embodiment of the present invention;

[0014] Figure 9 This is a schematic diagram of the valve cover structure in this utility model;

[0015] Figure 10 This is a schematic diagram of the structure of the motor and motor connecting plate in this utility model;

[0016] Figure 11 This is a schematic diagram showing the cooperation between the motor and the motor connecting plate in this utility model;

[0017] Figure 12 for Figure 11 An enlarged view of position D in the middle;

[0018] Figure 13 This is a schematic diagram of the structure of the motor and motor connecting plate in another embodiment of the present invention.

[0019] In the picture:

[0020] 1. Valve body assembly; 100. Valve port; 10. Valve cover; 101. First surface; 102. Second surface; 103. Annular cavity; 104. Connecting part; 1040. First step part; 1041. First step surface; 1042. First step wall; 1043. Connecting top surface; 1044. Limiting groove; 105. Mounting end; 106. Mounting groove; 107. Bolt; 108. First balancing channel; 109. Mounting hole; 11. Valve body; 110. Valve body cavity; 111. First channel; 112. Second channel; 113. Receiving groove; 1130. Groove side wall; 12. Sleeve; 120. Connecting port;

[0021] 2. Drive assembly; 20. Motor; 201. Motor connecting plate; 2010. Mating part; 20100. Arc-shaped short plate; 2011. Base plate; 2012. Edge boss; 2013. Outer end wall; 21. Gear set; 211. Transmission gear;

[0022] 22. Cover body; 220. Second step portion; 221. Second step surface; 222. Second step wall; 23. Bearing; 24. Lead screw; 241. External thread portion;

[0023] 3. Valve core assembly; 31. Connector; 310. Internal threaded part; 311. Second balance channel; 32. Cylindrical valve core; 320. Mating groove; 312. Connecting hole; 313. Nut sleeve; 314. Positioning sleeve; 315. Connecting body;

[0024] 4. Anti-rotation component; 5. Sealing component; 51. First sealing ring; 52. Second sealing ring; 53. Third sealing ring. Detailed Implementation

[0025] The embodiments of this utility model application will now be described in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them.

[0026] In the accompanying drawings, shapes and dimensions may be enlarged for clarity, and the same reference numerals will be used in all figures to indicate the same or similar parts.

[0027] like Figures 2 to 13 As shown, the present invention proposes an electric valve, including a valve body assembly 1, a drive assembly 2, a valve core assembly 3, an anti-rotation assembly 4, and a sealing assembly 5. The valve body assembly 1 includes a valve cover 10, a valve body 11, and a sleeve 12. The valve cover 10 and the valve body 11 are fixed together by bolts 107. The valve body 11 includes an inner cavity 110, and the sleeve 12 is located within the inner cavity 110 and is threadedly connected to the valve cover 10.

[0028] Among them, such as Figures 2 to 4 As shown, the valve cover 10 includes a first surface 101 and a connecting portion 104. The first surface 101 is located on the upper side of the valve cover 10, and the connecting portion 104 is protruding relative to the first surface 101. The drive assembly 2 includes a cover 22. The cover 22 and the valve cover 10 are made of steel. The cover 22 is welded and fixed to the connecting portion 104. The connecting portion 104 is annular and includes a first step portion 1040. The first step portion 1040 is located on the outer wall surface of the connecting portion 104. The first step portion 1040 includes a first step surface 1041 and a first step wall 1042 located above the first step surface 1041. The lower end surface of the cover 22 abuts against the first step surface 1041.

[0029] Through the above structural design, the cover 22 and the valve cover 10 in this utility model are connected by welding. The valve cover 10 includes a ring-shaped protruding connecting portion 104, which includes a first stepped portion 1040. The first stepped portion 1040 positions and supports the cover 22. After being properly fitted, the cover 22 and the stepped surface of the first stepped portion 1040 are welded and fixed. Compared with the prior art, the cover 22 and the connecting portion 104 do not require additional thread processing, and the thickness requirement of the cover 22 is relatively low. While ensuring sealing performance, the processing and manufacturing cost of the cover 22 is saved.

[0030] Furthermore, the drive assembly 2 includes a motor 20 and a gear set 21, and the valve cover 10 includes an annular cavity 103 located inside the connecting portion 104, with the gear set 21 located within the annular cavity 103; the motor 20 is located above the annular cavity 103. By providing the annular cavity 103 on the valve cover 10, and housing the portion of the drive assembly 2 excluding the motor 20 and the motor connecting plate 201 within the annular cavity 103, the internal dimensional requirements of the cover 22 can be effectively reduced, and the depth dimension machining amount of the cover 22 can be decreased, which is beneficial for ensuring the structural strength and machining accuracy of the cover 22.

[0031] Furthermore, such as Figure 4 , Figure 8 As shown, the valve cover 10 includes a receiving groove 113, which is recessed relative to the first surface 101. The inner wall of the connecting portion 104 is flush with the groove sidewall 1130 of the receiving groove 113. The gear set 21 is partially located in the receiving groove 113. The inner wall of the connecting portion 104 and the groove sidewall 1130 of the receiving groove 113 form the cavity wall of the annular cavity 103. Specifically, the valve cover 10 includes a recessed receiving groove 113 and an upwardly protruding annular connecting portion 104. The internal space of the connecting portion 104 and the receiving groove 113 is the annular cavity 103. The annular cavity 103 and the inner cavity of the cover 22 provide sufficient installation space for the drive assembly 2. Furthermore, the cover 22 is a stainless steel stamped part, and the valve cover 10 is made of carbon steel. Under the premise of a certain accommodating space, the annular connecting part 104 protrudes relative to the first surface 101, and the stamping depth of the cover 22 can be reduced accordingly, which is conducive to improving the structural strength of the cover 22, reducing the processing difficulty, and improving the reliability of the electric valve.

[0032] Furthermore, in one embodiment, the inner wall surface of the cover 22 includes a second step portion 220, which includes a second step surface 221 and a second step wall 222 located below the second step surface 221; the connecting portion 104 includes a connecting top surface 1043, the second step surface 221 abuts against the connecting top surface 1043, and the second step wall 222 is initially connected to the aforementioned first step wall 1042 by an interference fit. By setting the first step portion 1040 and the second step portion 220, the connecting portion 104 and the cover 22 are guided and positioned, facilitating the welding and fixing of the cover 22 to the connecting portion 104 after the cover 22 is installed in place.

[0033] In one embodiment, such as Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12As shown, the drive assembly 2 also includes a motor 20 and a motor connecting plate 201, which are fixedly connected. The connecting portion 104 includes a limiting groove 1044 and a connecting top surface 1043, with the limiting groove 1044 recessed downwards relative to the connecting top surface 1043. The motor connecting plate 201 includes a mating portion 2010, partially located within the limiting groove 1044, which engages and limits the movement. The mating portion 2010 includes an outer end wall 2013, which tightly engages with the second stepped wall 222. Through this structural design, the motor 20 and the valve cover 10 are circumferentially engaged and limited, requiring no welding and facilitating connection.

[0034] Furthermore, the mating part 2010 is an arc-shaped short plate 20100 extending radially outward relative to the bottom of the motor 20. The arc-shaped short plate 20100 includes a base plate 2011 and an edge boss 2012. The edge boss 2012 is located on the side of the base plate 2011 away from the motor 20, and the edge boss 2012 protrudes upward relative to the base plate 2011. There are multiple arc-shaped short plates 20100, which are evenly distributed around the circumference of the motor 20. The motor connecting plate 201 is made of metal, and the edge boss 2012 is formed by stamping. In the height direction of the connecting part 104, the mating part 2010 at least partially extends out of the limiting groove 1044. The inner wall surface of the cover 22 includes a second step part 220, which includes a second step surface 221 that abuts against the mating part 2010.

[0035] Through the above structural design, the second stepped surface 221 on the cover 22 abuts against the mating part 2010, and the mating part 2010 is partially located in the limiting groove 1044. Thus, along the axial direction of the electric valve, the second stepped surface 221 and the bottom of the limiting groove 1044 can limit the motor connecting plate 201. In the longitudinal direction of the electric valve, the edge boss 2012 and the base plate 2011 have a height difference. When the cover 22 abuts against the first stepped part 1040, the second stepped surface 221 on the cover 22 presses against the mating part 2010, causing the edge boss 2012 to undergo plastic deformation relative to the base plate 2011, pressing against the two side walls of the limiting groove 1044, thereby achieving axial positioning of the motor connecting plate 201.

[0036] In one embodiment, such as Figure 9 , Figure 10 , Figure 11 , Figure 12As shown, when the mating part 2010 mates with the limiting groove 1044, the substrate 2011 abuts against the bottom of the limiting groove 1044, and the edge boss 2012 extends out of the limiting groove 1044. When the second step surface 221 on the cover 22 abuts against the connecting top surface 1043 of the connecting part 104, the edge boss 2012 is pressed and undergoes plastic deformation relative to the substrate 2011, pressing against the two side walls of the limiting groove 1044 to achieve axial positioning of the motor connecting plate 201.

[0037] In another embodiment, such as Figure 9 , Figure 10 , Figure 11 , Figure 13 As shown, when the mating part 2010 mates with the limiting groove 1044, the edge boss 2012 abuts against the bottom of the limiting groove 1044, and the substrate 2011 extends out of the limiting groove 1044. When the second step surface 221 on the cover 22 abuts against the connecting top surface 1043 of the connecting part 104, the substrate 2011 is pressed, squeezing the edge boss 2012 to cause plastic deformation, pressing against the two side walls of the limiting groove 1044, thereby achieving axial positioning of the motor connecting plate 201.

[0038] With the above structural design, when the drive assembly 2 is connected to the valve cover 10, the motor 20 is fixedly connected to the motor connecting plate 201. After the motor connecting plate 201 is aligned and engaged with the limiting groove 1044, the cover 22 is pressed down to fit tightly with the connecting part 104. The stepped surface of the inner wall of the cover 22 presses against the edge protrusion 2012 on the motor connecting plate 201 to deform it and abut against the limiting groove 1044. The axial positioning of the motor connecting plate 201 is achieved by the plastic deformation of the mating part 2010. No additional connection steps are required, the mating structure is optimized, and processing time is saved.

[0039] In another embodiment, such as Figure 4 , Figure 6 , Figure 8As shown, the motor 20 and the motor connecting plate 201 are fixedly connected. The connecting part 104 includes a connecting top surface 1043. The cover 22 includes a second step part 220, which is located on the inner wall of the cover 22. The second step part 220 includes a second step surface 221 and a second step wall 222 located below the second step surface 221. The motor connecting plate 201 and the second step surface 221 are welded and fixed. When the end face of the cover 22 abuts against the first step surface 1041 on the connecting part 104, there is a distance h between the motor connecting plate 201 and the connecting top surface 1043, and the second step wall 222 is tightly fitted with the outer wall surface of the connecting part 104. In this embodiment, the motor connecting plate 201 is first fixedly connected to the cover 22, which can be done by welding. The cover 22 then abuts against and is tightly fitted with the first step part 1040. When properly aligned, the motor connecting plate 201 and the connecting top surface 1043 have a distance h between them, meaning the height of the second step wall 222 is greater than the height of the first step wall 1042. This allows the connecting top surface 1043 to avoid the weld seam between the motor connecting plate 201 and the cover 22, preventing installation interference. Preferably, the distance h ≥ 1 mm.

[0040] Furthermore, in one embodiment, such as Figure 2 , Figure 3 , Figure 4 , Figure 8 As shown, the valve body assembly 1 includes a valve body 11 and a sleeve 12, and the valve cover 10 is fixed to the valve body 11 by bolts 107. The valve cover 10 includes a second surface 102, a mounting end 105, and a mounting groove 106. The second surface 102 is located on the lower side of the valve cover 10, and the mounting end 105 protrudes downward relative to the second surface 102. The mounting end 105 is at least partially located in the inner cavity 110 of the valve body, and the outer side wall of the mounting end 105 is tightly fitted with the inner side wall of the valve body 11. The mounting groove 106 is located inside the mounting end 105 and is recessed upward relative to the bottom surface of the mounting end 105. The inner side wall of the mounting groove 106 is threadedly connected to the outer side wall of the first end of the sleeve 12. The outer wall surface of the second end of the sleeve 12 is tightly fitted with the inner wall surface of the valve body 11. The electric valve includes a sealing assembly 5, which includes a first sealing ring 51 and a second sealing ring 52. The outer wall surface of the valve cover 10 includes a first annular groove, in which the first sealing ring 51 is accommodated and seals the fitting gap between the valve cover 10 and the valve body 11. The outer wall surface of the sleeve 12 includes a second annular groove, in which the second sealing ring 52 is located and seals the fitting gap between the sleeve 12 and the valve body 11. The valve body 11, the valve cover 10, and the sleeve 12 are connected by bolts 107 or threads, and the fitting gap is sealed by the sealing assembly 5. The connection structure is simple and easy to assemble and disassemble.

[0041] The valve cover 10 includes a first balancing channel 108, which connects the receiving groove 113 above the valve cover 10 with the valve body cavity 110 below the valve cover 10. The electric valve also includes a valve core assembly 3, which includes a connector 31 and a cylindrical valve core 32. The connector 31 and the cylindrical valve core 32 are connected by threads, and the cylindrical valve core 32 can reciprocate axially relative to the inner wall of the sleeve 12. The connector 31 includes a second balancing channel 311, one end of which is located on the upper surface of the connector 31, and the other end of which is located on the lower surface of the connector 31. The second balancing channel 311 connects a portion of the inner cavity of the sleeve 12 above the connector 31 and the inner cavity of the cylindrical valve core 32 below the connector 31. The electric valve balances the pressure in the valve body cavity 110 located on the upper and lower sides of the valve core assembly 3 through the first balancing channel 108 and the second balancing channel 311, preventing internal pressure differences from affecting the operating performance of the electric valve core assembly 3.

[0042] In one embodiment, such as Figure 4 , Figure 5 , Figure 6 As shown, the drive assembly 2 of the electric valve includes a bearing 23 and a lead screw 24. The gear set 21 includes a transmission gear 211, which drives the lead screw 24 to rotate. The lead screw 24 includes an external thread portion 241. The connecting piece 31 and the cylindrical valve core 32 are connected by threads. The connecting piece 31 includes an internal thread portion 310, and the external thread portion 241 engages with the internal thread portion 310. The rotation of the lead screw 24 drives the cylindrical valve core 32 to reciprocate axially relative to the inner wall of the sleeve 12. The sealing assembly 5 includes a third sealing ring 53, which seals the mating gap between the cylindrical valve core 32 and the sleeve 12. The valve cover 10 includes a mounting hole 109, which longitudinally connects a receiving groove 113 and a mounting groove 106. The outer side wall of the bearing 23 is tightly fitted with the inner side wall of the mounting hole 109, and the outer side wall of the transmission gear 211 is tightly fitted with the inner side wall of the bearing 23. The transmission gear 211 is fixedly connected to the lead screw 24. Alternatively, the outer wall of bearing 23 is tightly fitted with the inner wall of mounting hole 109, the outer wall of transmission gear 211 is tightly fitted with the inner wall of bearing 23, and transmission gear 211 is fixedly connected to lead screw 24. This structural design helps maintain good coaxiality of bearing 23, lead screw 24, and cylindrical valve core 32, reduces vibration and uneven wear during the movement of cylindrical valve core 32, and improves the straightness of the movement of cylindrical valve core 32.

[0043] Furthermore, in one embodiment, as Figure 5As shown, the connector 31 includes a connecting body 315, a nut sleeve 313, and a positioning sleeve 314. The connecting body 315 includes a connecting hole 312, the nut sleeve 313 is located in the connecting hole 312, and the positioning sleeve 314 is fixedly connected to the connecting body 315. In the longitudinal direction of the electric valve, the nut sleeve 313 is confined within the connecting hole 312 by the positioning sleeve 314. The lead screw 24 is threadedly connected to the inner wall of the nut sleeve 313. The internal thread portion 310 is located on the inner wall of the nut sleeve 313. The nut sleeve 313 and the connecting body 315 are separately set and confined, which helps to reduce the processing difficulty of the connecting body 315. The nut sleeve 313 is made of plastic injection molding, while the connecting body 315 is made of metal material, which helps to reduce the thread processing cost, improve the strength of the connecting body 315, and allow for individual replacement of the nut sleeve 313 when it is damaged, without scrapping the entire connector 31.

[0044] Furthermore, the electric valve also includes an anti-rotation component 4, which restricts the circumferential rotation of the cylindrical valve core 32. In one embodiment, the anti-rotation component 4 includes an anti-rotation screw and a steel ball. The outer wall of the cylindrical valve core 32 includes a mating groove 320 that extends longitudinally along the outer wall of the cylindrical valve core 32. The sleeve 12 includes a threaded hole. A portion of the steel ball is located in the threaded hole, and another portion is located in the mating groove 320. The anti-rotation screw is at least partially located in the threaded hole and threadedly connected to the threaded hole. The steel ball is located between the anti-rotation screw and the mating groove 320, and the steel ball engages with the groove wall of the mating groove 320 to restrict the circumferential rotation of the cylindrical valve core 32.

[0045] Through the above structural design, disassembly and repair can be carried out conveniently and quickly when the electric valve malfunctions. Specifically, after removing the bolt 107 to separate the valve body 11 from the valve cover 10, the valve cover 10, sleeve 12, drive assembly 2, and valve core assembly 3, which are connected together, can be removed. Then, the anti-rotation assembly 4 can be unscrewed, allowing the sleeve 12 to be rotated to detach from the valve cover 10, exposing the internal valve core assembly 3. Further rotation of the cylindrical valve core 32 and the connecting piece 31 can separate the cylindrical valve core 32, the connecting part 104, and the lead screw 24, thereby allowing for the inspection and replacement of each component. The threaded connection design between the components can reduce the inspection and replacement cost of the electric valve. Similarly, the cylindrical valve core 32 and the connecting piece 31 can also be an integral structure.

[0046] Furthermore, the valve body 11 includes a first channel 111, a valve body cavity 110, a valve port 100, and a second channel 112. The cylindrical valve core 32 can abut against the valve port 100. The sleeve 12 includes a connecting port 120, which connects the valve body cavity 110 inside and outside the sleeve 12. Furthermore, there are at least two connecting ports 120, one of which is positioned opposite the first channel 111. The design of two connecting ports 120 facilitates the balancing of fluid pressure inside and outside the sleeve 12.

[0047] Furthermore, the flow area of ​​the connecting port 120 gradually decreases downwards along the longitudinal direction of the sleeve 12. The flow rate of the electric valve is regulated by the cooperation of the cylindrical valve core 32 with the connecting port 120.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the technical solutions formed by the combination of these technical features do not contradict each other, they should be considered to be within the scope of this specification.

[0049] The above examples illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. An electric valve, comprising a valve body assembly (1) and an actuation assembly (2), said valve body assembly (1) including a valve cover (10), characterized in that, The valve cover (10) includes a first surface (101) and a connecting portion (104). The first surface (101) is located on the upper side of the valve cover (10), and the connecting portion (104) is protruding relative to the first surface (101). The drive assembly (2) includes a cover (22). The cover (22) and the valve cover (10) are made of steel. The cover (22) is welded and fixed to the connecting portion (104). The connecting portion (104) is annular. The connecting portion (104) includes a first step portion (1040). The first step portion (1040) is located on the outer wall surface of the connecting portion (104). The first step portion (1040) includes a first step surface (1041) and a first step wall (1042) located above the first step surface (1041). The lower end face of the cover (22) abuts against the first step surface (1041).

2. The electric valve as described in claim 1, characterized in that, The drive assembly (2) includes a motor (20) and a gear set (21). The valve cover (10) includes an annular cavity (103), which is located inside the connecting part (104). The gear set (21) is located in the annular cavity (103). The motor (20) is located above the annular cavity (103).

3. The electric valve as described in claim 2, characterized in that, The valve cover (10) includes a receiving groove (113) which is recessed relative to the first surface (101). The inner wall of the connecting part (104) is flush with the groove sidewall (1030) of the receiving groove (113). The gear set (21) is partially located in the receiving groove (113). The inner wall of the connecting part (104) and the groove sidewall (1030) of the receiving groove (113) serve as the cavity wall of the annular cavity (103).

4. The electric valve according to any one of claims 1-3, characterized in that, The drive assembly includes a motor (20) and a motor connecting plate (201). The motor (20) and the motor connecting plate (201) are fixedly connected. The connecting part (104) includes a limiting groove (1044) and a connecting top surface (1043). The limiting groove (1044) is recessed relative to the connecting top surface (1043). The motor connecting plate (201) includes a mating part (2010). The mating part (2010) is partially located in the limiting groove (1044). The mating part (2010) is circumferentially engaged and limited with the limiting groove (1044).

5. The electric valve as described in claim 4, characterized in that, The mating part (2010) is an arc-shaped short plate (20100) extending outward relative to the bottom of the motor (20). The arc-shaped short plate (20100) includes a base plate (2011) and an edge boss (2012). The edge boss (2012) is located on the side of the base plate (2011) away from the motor (20). The edge boss (2012) protrudes relative to the base plate (2011). There are multiple arc-shaped short plates (20100), and the multiple arc-shaped short plates (20100) are evenly distributed along the circumference of the motor (20).

6. The electric valve as described in claim 5, characterized in that, The edge boss (2012) is formed by stamping. In the height direction of the connecting part (104), the substrate (2011) contacts the bottom of the limiting groove (1044), and the edge boss (2012) extends out of the limiting groove (1044). The cover (22) includes a second step (220), which is located on the inner wall of the cover (22). The second step (220) includes a second step surface (221), which abuts against the edge boss (2012).

7. The electric valve as described in claim 5, characterized in that, The edge boss (2012) is formed by stamping. In the height direction of the connecting part (104), the edge boss (2012) contacts the bottom of the limiting groove (1044). The substrate (2011) extends at least partially out of the limiting groove (1044). The cover (22) includes a second step (220), which includes a second step surface (221) that abuts against the substrate (2011).

8. The electric valve according to any one of claims 1-7, characterized in that, The drive assembly includes a motor (20) and a motor connecting plate (201). The motor (20) and the motor connecting plate (201) are fixedly connected. The connecting part (104) includes a connecting top surface (1043). The cover (22) includes a second step part (220). The second step part (220) is located on the inner wall of the cover (22). The second step part (220) includes a second step surface (221) and a second step wall (222) located below the second step surface (221). The motor connecting plate (201) and the second step surface (221) are welded and fixed. The motor connecting plate (201) is at a distance from the connecting top surface (1043). The second step wall (222) is tightly fitted with the outer wall surface of the connecting part (104).

9. The electric valve according to any one of claims 4-7, characterized in that, The cover (22) is a stainless steel stamping part. The cover (22) includes a second step portion (220), which is located on the inner wall of the cover (22). The second step portion (220) includes a second step surface (221) and a second step wall (222) located below the second step surface (221). The connecting part (104) includes a connecting top surface (1043), which abuts against the second step surface (221) and the connecting top surface (1043). The second step wall (222) is tightly fitted with the outer wall surface of the connecting part (104). The mating part (2010) includes an outer end wall (2013), which is tightly fitted with the second step wall (222).

10. The electric valve according to any one of claims 1-9, characterized in that, The valve body assembly (1) includes a valve body (11) and a sleeve (12). The valve cover (10) is fixed to the valve body (11) by bolts (107). The valve cover (10) includes an annular cavity (103) located inside the connecting part (104). The valve body (11) includes an inner cavity (110). The valve cover (10) includes a second surface (102), a mounting end (105), and a mounting groove (106). The second surface (102) is located inside the valve body. On the lower side of the cover (10), the mounting end (105) protrudes downward relative to the second surface (102), the mounting end (105) is at least partially located in the inner cavity (110) of the valve body, and the outer side wall of the mounting end (105) is tightly fitted with the inner side wall of the valve body (11); the mounting groove (106) is located inside the mounting end (105) and recessed upward relative to the bottom surface of the mounting end (105), and the inner side wall of the mounting groove (106) is threadedly connected to the outer side wall of the sleeve (12).

11. The electric valve as claimed in claim 10, characterized in that, The drive assembly (2) includes a gear set (21), a bearing (23), and a lead screw (24). The gear set (21) includes a transmission gear (211). The valve cover (10) includes a mounting hole (109) along the longitudinal direction of the electric valve, the mounting hole (109) connecting the annular cavity (103) and the mounting groove (106). The outer side wall of the bearing (23) is tightly fitted with the inner side wall of the mounting hole (109), and the outer side wall of the transmission gear (211) is tightly fitted with the inner side wall of the bearing (23). The inner wall of the bearing (23) is tightly fitted with the inner wall of the mounting hole (109), or the outer wall of the bearing (23) is tightly fitted with the inner wall of the mounting hole (109), and the outer wall of the transmission gear (211) is tightly fitted with the inner wall of the bearing (23); the transmission gear (211) is fixedly connected to the lead screw (24); the electric valve also includes a valve core assembly (3), the valve core assembly (3) is tightly fitted with the inner wall of the sleeve (12), and the lead screw (24) drives the valve core assembly (3) to move axially along the sleeve (12).

12. The electric valve as described in claim 10, characterized in that, The drive assembly (2) includes a lead screw (24) and a gear set (21). The gear set (21) includes a transmission gear (211). The transmission gear (211) drives the lead screw (24) to rotate. The lead screw (24) includes an external thread (241). The electric valve also includes a valve core assembly (3). The valve core assembly (3) includes a connector (31) and a cylindrical valve core (32). The connector (31) and the cylindrical valve core (32) are connected by threads. The connector (31) includes an internal thread (310). The external thread (241) cooperates with the internal thread (310). The rotation of the lead screw (24) drives the cylindrical valve core (32) to reciprocate axially along the inner wall of the sleeve (12).

13. The electric valve according to any one of claims 10-12, characterized in that, The valve body assembly (1) includes a valve body (11) and a sleeve (12). The valve cover (10) includes a first balance channel (108), which connects the annular cavity (103) above the valve cover (10) with the valve body cavity (110) below the valve cover (10). The electric valve also includes a valve core assembly (3), which includes a connector (31) and a cylindrical valve core (32). The connector (31) and the cylindrical valve core (32) are connected by threads. 32) It can reciprocate along the inner wall of the sleeve (12) axially; the connector (31) includes a second balance channel (311), one end of the second balance channel (311) is located on the upper surface of the connector (31), the other end of the second balance channel (311) is located on the lower surface of the connector (31), and the second balance channel (311) connects the inner cavity of the sleeve (12) located above the connector (31) and the inner cavity of the cylindrical valve core (32) located below the connector (31).

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