Electric valve

Abstract

Provided in the present application is an electric valve, comprising a fixing frame, a sleeve and a valve body which are welded to one another; the fixing frame is sleeved on the periphery of the position of welding between the sleeve and the valve body; a first welding area is formed at the position of welding between the fixing frame and the sleeve, a second welding area is formed at the position of welding between the fixing frame and the valve body, and a third welding area is formed at the position of welding among the sleeve, the valve body and the fixing frame, the first welding area, the third welding area and the second welding area being sequentially arranged at intervals in the axial direction of the electric valve, and the third welding area being a full-circle welding seam extending in the circumferential direction of the electric valve. Without increasing the welding power, the fixing frame is additionally provided, and the fixing frame is separately welded to the sleeve and the valve body, so as to form the first welding area and the second welding area that are distributed on the upper side and the lower side of the third welding area; the fixing frame, the first welding area, the second welding area and the third welding area jointly achieve distributed bearing of pressure, thereby reducing the stress at the third welding area, and enhancing the connection strength between the sleeve and the valve body.

Description

electric valve

[0001] This application claims priority to the patent application filed on November 9, 2024, with application number 202422734246.3 and entitled "Electric Valve". Technical Field

[0002] This application relates to the field of electric valve technology, and more specifically, to an electric valve. Background Technology

[0003] The housing of the CO2 electronic expansion valve consists of a sleeve and a valve body. Due to the high pressure of CO2 refrigerant, the weld strength between the sleeve and the valve body is required to meet the high pressure requirements of CO2 refrigerant, so as to avoid the refrigerant leakage caused by weld cracking.

[0004] In existing technologies, increasing welding power is usually used to improve welding results. However, increasing welding power will increase the heat-affected zone, which may affect the internal plastic nut (the plastic nut is prone to melting and causing problems such as jamming). In addition, excessive power can also easily cause porosity in the weld, affecting the stability of the weld. Summary of the Invention

[0005] This application provides an electric valve to improve the welding effect of the valve body and the sleeve.

[0006] To achieve the above objectives, this application provides an electric valve, which includes a fixed frame, a sleeve, and a valve body welded together in pairs. The fixed frame is sleeved on the outer periphery of the welding position of the sleeve and the valve body. The welding position of the fixed frame and the sleeve forms a first welding area, the welding position of the fixed frame and the valve body forms a second welding area, and the welding position of the sleeve and the valve body forms a third welding area. The first welding area, the third welding area, and the second welding area are sequentially spaced apart in the axial direction of the electric valve. The third welding area is a full-circumference weld extending along the circumference of the electric valve.

[0007] Furthermore, the distance between the first welding area and the third welding area in the axial direction of the electric valve is greater than 1.2 mm, and / or the distance between the second welding area and the third welding area in the axial direction of the electric valve is greater than 1.2 mm.

[0008] Furthermore, the first welding zone is a full-circumference weld extending along the circumference of the electric valve; or, the first welding zone includes multiple segments of first welds extending along the circumference of the electric valve, with the multiple segments of first welds arranged sequentially along the circumference of the electric valve.

[0009] Furthermore, in the case where the first welding area includes multiple first weld seams extending circumferentially along the electric valve, the multiple first weld seams are evenly distributed circumferentially along the electric valve, and / or the multiple first weld seams are symmetrically distributed about the axis of the electric valve.

[0010] Furthermore, the second welding zone is a full-circumference weld extending along the circumference of the electric valve; or, the second welding zone includes multiple segments of second welds extending along the circumference of the electric valve, with the multiple segments of second welds arranged sequentially along the circumference of the electric valve.

[0011] Furthermore, in the case where the second welding zone includes multiple segments of second welds extending circumferentially along the electric valve, the multiple segments of second welds are evenly distributed circumferentially along the electric valve, and / or the multiple segments of second welds are symmetrically distributed about the axis of the electric valve.

[0012] Furthermore, the weld penetration depth of the first welding zone on the sleeve is 0.3mm to 0.6mm, and / or the weld penetration depth of the second welding zone on the valve body is 0.3mm to 0.6mm.

[0013] Furthermore, the fixing bracket is welded to the valve body and the sleeve at the third welding zone.

[0014] Furthermore, the mounting bracket and sleeve are welded through.

[0015] Furthermore, the second welding area is located at the end of the fixture.

[0016] Furthermore, the electric valve also includes a valve needle assembly, a nut assembly, a sealing assembly, a rotor assembly, and an external connecting pipe. The rotor assembly and the nut assembly are both housed within the sleeve. One end of the valve needle assembly passes through the nut assembly and the rotor assembly and is threadedly connected to the nut assembly. The other end of the valve needle assembly is sealed and installed in the valve body through the sealing assembly. The valve body has multiple flow ports, and an external connecting pipe is connected to any one of the flow ports.

[0017] The present application provides an electric valve, which includes a fixed frame, a sleeve, and a valve body welded together in pairs. The fixed frame is sleeved on the outer periphery of the welding position of the sleeve and the valve body. The welding position of the fixed frame and the sleeve forms a first welding area, the welding position of the fixed frame and the valve body forms a second welding area, and the welding position of the sleeve, the valve body, and the fixed frame forms a third welding area. The first welding area, the third welding area, and the second welding area are sequentially spaced along the axial direction of the electric valve. The third welding area is a full-circumference weld extending along the circumference of the electric valve.

[0018] In this design, the sleeve and valve body are connected to form a shell that meets the high-pressure requirements of the CO2 refrigerant. Without increasing the welding power between the two, a fixing frame is added and welded to the sleeve and valve body respectively, forming a first welding area and a second welding area distributed on the upper and lower sides of the original third welding area. The fixing frame, the first welding area, the second welding area, and the third welding area work together to distribute the pressure, avoiding the situation in the prior art where the third welding area is easily broken under the constant pressure changes when only the sleeve and valve body are connected. This design reduces the stress at the third welding area, improves the connection strength between the sleeve and the valve body, and thus ensures the reliability of the electric valve. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 shows a schematic diagram of the structure of the electric valve provided in an embodiment of this application;

[0021] Figure 2 shows an enlarged view of position A in Figure 1.

[0022] The above-mentioned figures include the following reference numerals: 10, fixing bracket; 20, sleeve; 30, valve body; 401, first welding area; 402, second welding area; 403, third welding area; 50, valve needle assembly; 60, nut assembly; 70, sealing assembly; 80, rotor assembly; 90, outer pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] As shown in Figures 1 and 2, this application provides an electric valve, which includes a fixed frame 10, a sleeve 20, and a valve body 30 welded together in pairs. The fixed frame 10 is sleeved on the outer periphery of the welding position of the sleeve 20 and the valve body 30. The welding position of the fixed frame 10 and the sleeve 20 forms a first welding area 401, the welding position of the fixed frame 10 and the valve body 30 forms a second welding area 402, and the welding position of the sleeve 20 and the valve body 30 forms a third welding area 403. The first welding area 401, the third welding area 403, and the second welding area 402 are sequentially spaced apart in the axial direction of the electric valve. The third welding area 403 is a full-circumference weld extending along the circumference of the electric valve.

[0025] In some embodiments, the sleeve 20 and the valve body are connected to form a shell that needs to meet the high pressure requirements of the refrigerant CO2. Without increasing the welding power between the two, a fixing frame 10 is added and welded to the sleeve 20 and the valve body 30 respectively, forming a first welding area 401 and a second welding area 402 distributed on the upper and lower sides of the original third welding area 403. The fixing frame 10, the first welding area 401, the second welding area 402, and the third welding area 403 together achieve pressure distribution and bearing, avoiding the situation in the prior art where only the third welding area 403 between the sleeve 20 and the valve body 30 is used for connection, which is prone to breakage under continuous pressure changes. This embodiment reduces the force at the third welding area 403, improves the connection strength between the sleeve 20 and the valve body, and thus ensures the reliability of the electric valve.

[0026] Understandably, the third welding zone 403 needs to ensure that the electric valve housing does not leak externally, so a full-circle closed welding is adopted.

[0027] Specifically, the distance between the first welding area 401 and the third welding area 403 in the axial direction of the electric valve is greater than 1.2 mm, and / or the distance between the second welding area 402 and the third welding area 403 in the axial direction of the electric valve is greater than 1.2 mm.

[0028] This configuration, by limiting the distance between the first welding area 401 and the third welding area 403, avoids the overlap and mutual influence of the heat-affected zones of the materials when welding the first welding area 401 and the third welding area 403, which would lead to repeated welding and affect the material properties, thus ensuring the reliability and stability of the forming of the first welding area 401 and the third welding area 403. Similarly, by limiting the distance between the second welding area 402 and the third welding area 403, it avoids the overlap and mutual influence of the heat-affected zones of the materials when welding the second welding area 402 and the third welding area 403, which would lead to repeated welding and affect the material properties, thus ensuring the reliability and stability of the forming of the second welding area 402 and the third welding area 403.

[0029] It should be noted that in some embodiments, the distance between the first welding area 401 and the third welding area 403 in the axial direction of the electric valve is greater than 1.2 mm, and the distance between the second welding area 402 and the third welding area 403 in the axial direction of the electric valve is greater than 1.2 mm.

[0030] In some embodiments, the first welding area 401 is a full-circumference (closed) weld extending along the circumference of the electric valve. The weld is subjected to uniform stress, which is beneficial to improving the welding effect of the fixing frame 10 and the sleeve 20.

[0031] In other embodiments (not shown in the figures), the first welding area 401 includes multiple first weld seams extending circumferentially along the electric valve, with the multiple first weld seams arranged sequentially along the circumferential direction of the electric valve. This arrangement helps to reduce the welding length and save welding costs while ensuring the welding effect between the fixing bracket 10 and the sleeve 20.

[0032] Furthermore, when the first welding area 401 includes multiple first weld seams extending circumferentially along the electric valve, the multiple first weld seams are evenly distributed circumferentially along the electric valve, and / or, the multiple first weld seams are symmetrically distributed around the axis of the electric valve. This arrangement helps to ensure the uniform distribution of the multiple first weld seams, thereby ensuring uniform stress on the first welding area 401, ensuring welding effect, and ensuring the reliability and stability of the welding. It is understood that the extension length and distribution of each first weld seam, the distance between any two adjacent first weld seams, etc., can be adaptively adjusted according to the actual situation to ensure that the multiple first weld seams are symmetrically distributed relative to the axis of the electric valve. In some embodiments, the extension lengths of the multiple first weld seams are the same, and the arc length between any two adjacent first weld seams is the same. When the number of first weld seams is even, the multiple first weld seams are evenly distributed circumferentially along the electric valve and symmetrically distributed around the axis of the electric valve. When the number of first weld seams is odd, the multiple first weld seams are evenly distributed circumferentially along the electric valve.

[0033] It is understood that the first welding area 401 may further include first welding points. In other embodiments not shown in the figures, the first welding area 401 is formed by a plurality of first welding points, which are uniformly distributed along the circumference of the electric valve, and / or, the plurality of first welding points are symmetrically distributed around the central axis of the electric valve; or, the first welding area 401 is formed by a plurality of first welding points and a plurality of first welds, which are evenly distributed alternately and at intervals along the circumference of the electric valve, and / or, the plurality of first welding points and the plurality of first welds are symmetrically distributed around the central axis of the electric valve. Further, a first welding point can also be understood as a first weld extending in the circumferential direction of the electric valve.

[0034] In some embodiments, the second welding area 402 is a full-circumference (closed) weld extending along the circumference of the electric valve. The weld is subjected to uniform stress, which is beneficial to improving the welding effect of the fixing frame 10 and the valve body 30.

[0035] In other embodiments not shown in the figures, the second welding area 402 includes multiple segments of second welds extending circumferentially along the electric valve, with these segments arranged sequentially along the circumference of the electric valve. This arrangement helps to reduce the welding length and save welding costs while ensuring the welding effect between the fixing bracket 10 and the sleeve 20.

[0036] Furthermore, when the second welding area 402 includes multiple second weld seams extending circumferentially along the electric valve, these multiple second weld seams are evenly distributed circumferentially along the electric valve, and / or symmetrically distributed around the axis of the electric valve. This arrangement helps ensure the uniform distribution of the multiple second weld seams, thereby ensuring uniform stress on the second welding area 402, guaranteeing welding effect, reliability, and stability. It is understood that the extension length and distribution of each second weld seam, the distance between any two adjacent second weld seams, etc., can be adaptively adjusted according to actual conditions to ensure that the multiple second weld seams are symmetrically distributed relative to the axis of the electric valve. In some embodiments, the extension lengths of the multiple second weld seams are the same, and the arc length between any two adjacent second weld seams is the same. When the number of second weld seams is even, the multiple second weld seams are evenly distributed circumferentially along the electric valve and symmetrically distributed around the axis of the electric valve. When the number of second weld seams is odd, the multiple second weld seams are evenly distributed circumferentially along the electric valve.

[0037] It is understood that the second welding area 402 may further include second welding points. In other embodiments not shown in the figures, the second welding area 402 is formed by a plurality of second welding points, which are uniformly distributed along the circumference of the electric valve, and / or, the plurality of second welding points are symmetrically distributed around the central axis of the electric valve; or, the second welding area 402 is formed by a plurality of second welding points and a plurality of second welds, which are evenly distributed alternately and at intervals along the circumference of the electric valve, and / or, the plurality of second welding points and a plurality of second welds are symmetrically distributed around the central axis of the electric valve. Further, a second welding point can also be understood as a second weld extending in the circumferential direction of the electric valve.

[0038] In some embodiments, the weld penetration depth of the first weld area 401 on the sleeve 20 is 0.3 mm to 0.6 mm, and / or the weld penetration depth of the second weld area 402 on the valve body 30 is 0.3 mm to 0.6 mm. It should be noted that the weld penetration depth of the first weld area 401 on the sleeve 20 is the maximum weld depth of the first weld area 401 along the radial direction of the sleeve 20, and the weld penetration depth of the second weld area 402 on the valve body 30 is the maximum weld depth of the second weld area 402 along the radial direction of the valve body 30.

[0039] This design, by limiting the weld penetration depth of the first welding area 401 on the sleeve 20, avoids the situation where the weld penetration depth of the first welding area 401 on the sleeve 20 is too deep, which would damage or weaken the structural strength of the sleeve 20. At the same time, it also avoids the situation where the weld penetration depth of the first welding area 401 on the sleeve 20 is too shallow, which would result in an unreliable weld between the sleeve 20 and the fixing bracket 10. This is beneficial to improving the stability and reliability of the weld between the sleeve 20 and the fixing bracket 10. Similarly, by limiting the weld penetration depth of the second welding area 402 on the valve body 30, it avoids the situation where the weld penetration depth of the second welding area 402 on the valve body 30 is too deep, which would damage or weaken the structural strength of the valve body 30. At the same time, it also avoids the situation where the weld penetration depth of the second welding area 402 on the valve body 30 is too shallow, which would result in an unreliable weld between the valve body 30 and the fixing bracket 10. This is beneficial to improving the stability and reliability of the weld between the valve body 30 and the fixing bracket 10.

[0040] It should be noted that, in some embodiments, the weld penetration depth of the first welding area 401 on the sleeve 20 is 0.3mm to 0.6mm, and the weld penetration depth of the second welding area 402 on the valve body 30 is 0.3mm to 0.6mm. It is understood that the specific selection of the weld penetration depth can be determined based on the actual thickness of the sleeve 20 and the valve body 30.

[0041] Specifically, in some embodiments, the sleeve 20 and the valve body 30 are directly welded (by means of welding such as laser welding). The fixing bracket 10 is fitted around the outer periphery of the valve body 30 and the sleeve 20 and will shield the third welding area 403, thereby protecting the third welding area 403 and preventing damage to the third welding area 403 caused by external environmental factors, thus ensuring the reliability of the welding of the valve body 30 and the sleeve 20 and the reliability of the seal.

[0042] Preferably, in other embodiments not shown in the figures, the fixing frame 10 is welded to the valve body 30 and the sleeve 20 at the third welding area 403. Specifically, the fixing frame 10 can be welded to the valve body 30 and the sleeve 20 using through welding. During the welding process, the fixing frame 10 is welded through, and the connection between the fixing frame 10 and the valve body 30 and the sleeve 20 is welded. After welding, the weld between the fixing frame 10, the valve body 30, and the sleeve 20 forms the third welding area 403. This arrangement helps to further improve the connection strength between the sleeve 20, the valve body 30, and the fixing frame 10, further ensuring the reliability and stability of the welding between the sleeve 20 and the valve body 30. Furthermore, using through welding improves the convenience of welding the three components and helps to save welding costs. It is understood that, in order to avoid wasting the material of the fixing frame 10, the welding between the fixing frame 10 and the valve body 30 and the sleeve 20 can also be done without through welding, and can be directly welded into shape. The specific welding method can be selected according to the actual situation, and will not be listed here.

[0043] In some embodiments, the fixing bracket 10 and the sleeve 20 are welded together. This arrangement helps to ensure the forming position of the first welding area 401 and the reliability of the welding, avoiding situations where other welding methods would result in the first welding area 401 being too far from the third welding area 403, leading to poor force distribution and bearing effect or high welding costs.

[0044] Understandably, in order to avoid wasting the material of the fixing frame 10, the second welding area 402 is located at the end of the fixing frame 10. In this case, the second welding area 402 does not need to be penetrated and can be directly welded into shape.

[0045] In some embodiments, the electric valve is an electronic expansion valve. The electric valve also includes a valve needle assembly 50, a nut assembly 60, a sealing assembly 70, a rotor assembly 80, and an external connector 90. The rotor assembly 80 and the nut assembly 60 are both disposed within the sleeve 20. One end of the valve needle assembly 50 passes through the nut assembly 60 and the rotor assembly 80 and is threadedly connected to the nut assembly 60. The other end of the valve needle assembly 50 is sealed and installed within the valve body 30 through the sealing assembly 70. The valve body 30 has multiple flow ports, and an external connector 90 is connected to any one of the flow ports.

[0046] The above description is merely an optional embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electric valve, characterized in that, The electric valve includes a fixed frame (10), a sleeve (20) and a valve body (30) welded together in pairs. The fixed frame (10) is sleeved on the outer periphery of the welding position of the sleeve (20) and the valve body (30). The welding point of the fixing frame (10) and the sleeve (20) forms a first welding area (401), the welding point of the fixing frame (10) and the valve body (30) forms a second welding area (402), and the welding point of the sleeve (20) and the valve body (30) forms a third welding area (403). The first welding area (401), the third welding area (403) and the second welding area (402) are arranged sequentially at intervals along the axial direction of the electric valve, wherein the third welding area (403) is a full-circumference weld extending along the circumference of the electric valve.

2. The electric valve according to claim 1, characterized in that, The distance between the first welding area (401) and the third welding area (403) in the axial direction of the electric valve is greater than 1.2 mm, and / or the distance between the second welding area (402) and the third welding area (403) in the axial direction of the electric valve is greater than 1.2 mm.

3. The electric valve according to claim 1, characterized in that, The first welding area (401) is a full-circumference weld extending along the circumference of the electric valve; Alternatively, the first welding area (401) includes multiple first weld seams extending circumferentially along the electric valve, with the multiple first weld seams arranged sequentially along the circumferential direction of the electric valve.

4. The electric valve according to claim 3, characterized in that, In the case where the first welding area (401) includes multiple first weld seams extending circumferentially along the electric valve, Multiple segments of the first weld are evenly distributed along the circumference of the electric valve, and / or multiple segments of the first weld are symmetrically distributed around the axis of the electric valve.

5. The electric valve according to claim 1, characterized in that, The second welding area (402) is a full-circumference weld extending along the circumference of the electric valve; Alternatively, the second welding area (402) includes multiple second welds extending circumferentially along the electric valve, with the multiple second welds arranged sequentially along the circumferential direction of the electric valve.

6. The electric valve according to claim 5, characterized in that, In the case where the second welding area (402) includes multiple segments of second welds extending circumferentially along the electric valve, Multiple segments of the second weld are evenly distributed along the circumference of the electric valve, and / or, multiple segments of the second weld are symmetrically distributed around the axis of the electric valve.

7. The electric valve according to claim 1, characterized in that, The first welding area (401) on the sleeve (20) has a welding penetration depth of 0.3mm to 0.6mm, and / or the second welding area (402) on the valve body (30) has a welding penetration depth of 0.3mm to 0.6mm.

8. The electric valve according to claim 1, characterized in that, The fixing frame (10) is welded to the valve body (30) and the sleeve (20) at the third welding area (403).

9. The electric valve according to claim 1, characterized in that, The fixing frame (10) and the sleeve (20) are welded together.

10. The electric valve according to claim 1, characterized in that, The second welding area (402) is formed at the end of the fixing frame (10).

11. The electric valve according to claim 1, characterized in that, The electric valve also includes a valve needle assembly (50), a nut assembly (60), a sealing assembly (70), a rotor assembly (80), and an external connector (90). The rotor assembly (80) and the nut assembly (60) are both disposed within the sleeve (20). One end of the valve needle assembly (50) passes through the nut assembly (60) and the rotor assembly (80) and is threadedly connected to the nut assembly (60). The other end of the valve needle assembly (50) is sealed and installed within the valve body (30) through the sealing assembly (70). The valve body (30) has multiple flow ports, and an external connector (90) is connected to any one of the flow ports.

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