Electric valve

Abstract

According to the technical scheme, the connecting plates comprise the first connecting plate and the second connecting plate, the first connecting plate is far away from the valve seat assembly relative to the second connecting plate, the first connecting plate and the second connecting plate are fixedly connected, the first connecting plate and the sleeve are welded and fixed, the first connecting plate is made of a first material, and the second connecting plate is made of a second material; the density of the second material is smaller than that of the first material; the valve seat assembly comprises a valve seat part, the valve seat part is made of a second material, and a second connecting plate is welded and fixed to the valve seat part; and under the same volume, the mass of the second material is lighter than that of the first material, so that the overall mass of the electric valve is reduced, and the reliability of mutual welding connection between parts is improved.

Description

Technical Field

[0001] This application relates to the field of fluid control technology, specifically to an electric valve. Background Technology

[0002] In related technologies, electric valves include a nut assembly, a valve seat assembly, and a sleeve. The valve seat assembly and the sleeve are made of stainless steel. The valve seat assembly and the sleeve are welded and fixed together. The nut assembly includes a connecting plate, which is made of stainless steel and is welded and fixed together with the valve seat assembly. With this configuration, the overall weight of the electric valve is relatively heavy. Summary of the Invention

[0003] The purpose of this application is to provide an electric valve that helps to reduce the overall weight of the electric valve.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] An electric valve includes a nut assembly, a valve seat assembly, and a sleeve. The nut assembly includes a connecting plate, which comprises a first connecting plate and a second connecting plate. The first connecting plate is located away from the valve seat assembly relative to the second connecting plate. The first connecting plate is fixedly connected to the second connecting plate, and the first connecting plate is welded to the sleeve. The first connecting plate is made of a first material, and the second connecting plate is made of a second material, the second material having a lower density than the first material. The valve seat assembly includes a valve seat portion made of the second material, and the second connecting plate is welded to the valve seat portion.

[0006] In the technical solution of this application, the connecting plate includes a first connecting plate and a second connecting plate. The first connecting plate is farther away from the valve seat assembly relative to the second connecting plate. The first connecting plate and the second connecting plate are fixedly connected. The first connecting plate is welded and fixed to the sleeve. The first connecting plate is made of a first material, and the second connecting plate is made of a second material. The density of the second material is lower than that of the first material. The valve seat assembly includes a valve seat portion, which is made of the second material. The second connecting plate is welded and fixed to the valve seat portion. For the same volume, the mass of the second material is lighter than that of the first material. Therefore, it is not only beneficial to reduce the overall mass of the electric valve, but also beneficial to improve the reliability of the welding connection between the various components. Attached Figure Description

[0007] Figure 1 This is a front view schematic diagram of an embodiment of the electric valve provided in this application;

[0008] Figure 2 yes Figure 1 A cross-sectional view of the electric valve along plane AA;

[0009] Figure 3 yes Figure 2 A front view schematic diagram of the nut assembly of the electric valve shown;

[0010] Figure 4 yes Figure 2 A cross-sectional view of the nut assembly of the electric valve shown, without the connecting plate.

[0011] Figure 5 yes Figure 2 A three-dimensional structural schematic diagram of the first or second connecting plate of the electric valve shown;

[0012] Figure 6 yes Figure 2 A cross-sectional view of the valve seat assembly of the electric valve shown. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Numerous specific details are set forth in the following detailed description to provide a comprehensive understanding of the invention. However, those skilled in the art should understand that the specific components, devices, and features illustrated in the drawings and described herein are merely exemplary and should not be considered limiting.

[0014] The electric valve 100 provided by this invention can be applied to refrigerant systems such as commercial or vehicle thermal management systems or other systems requiring heat management. It can regulate the refrigerant flow rate in the system and can also function as an on / off valve. (Reference) Figures 1-2 The electric valve 100 includes a valve component 1, a valve body 2, and a coil component (not shown in the figure). The coil component is located on the outer periphery of the valve component 1 and is fixedly connected to the valve component 1 or connected to a limiting connection by means of screws, snap-fit, etc. The valve component 1 is electrically connected and / or signal connected to the outside world through the coil component. In this embodiment, the valve body 2 is a separate valve block, and the valve body 2 has a valve body cavity 21. At least part of the valve component 1 is located in the valve body cavity 21, and the valve component 1 is fixedly connected to the valve body 2. Of course, in other embodiments, it can also be part of other components, such as a heat exchanger in a cooling system or a flow channel plate formed in an integrated assembly.

[0015] refer to Figures 1-6The diagram schematically illustrates one embodiment of the electric valve 100. Valve component 1 includes a rotor assembly 11, a valve seat assembly 12, a valve core assembly 13, and a sleeve 16. The coil assembly includes a stator assembly (not shown) located on the outer periphery of the sleeve 16. The rotor assembly 11 is located within the cavity formed by the sleeve 16. The valve core assembly 13 is connected to the rotor assembly 11. Passing a predetermined current through the stator assembly generates an excitation magnetic field, causing the rotor assembly 11 to rotate. The rotor assembly 11 drives the valve core assembly 13 to move up and down along the axial direction of valve component 1. The valve seat assembly 12 includes a valve seat portion 121 and a valve port portion 1211. The valve core assembly 13 can cooperate with the valve port portion 1211 to control the refrigerant flow rate in the system. The valve seat assembly 12 includes an inlet channel 124 and an outlet channel 125; however, the flow directions of the two channels can be opposite.

[0016] Combination Figures 2-6 The valve component 1 also includes a nut assembly 14, which includes a connecting plate 142 and a main body 141. The connecting plate 142 includes a first connecting plate 1421 and a second connecting plate 1422. The first connecting plate 1421 is away from the valve seat assembly 12 relative to the second connecting plate 1422. The first connecting plate 1421 and the second connecting plate 1422 are fixedly connected. The connecting plate 142 and the main body 142 are fixed by injection molding. The nut assembly 14 is formed by injection molding with the connecting plate 142 as an insert. In this embodiment, the main body 141 is made of plastic material, such as PEEK (polyether ether ketone), PPS (polyphenylene sulfide), etc. The first connecting plate 1421 is fixedly connected to the sleeve 16 by welding. The welding method includes laser welding, brazing, etc. The second connecting plate 1422 is fixedly connected to the valve seat 121 by welding. The welding method includes laser welding, brazing, etc. In this embodiment, the first connecting plate 1421 is made of a first material, the sleeve 16 is made of a first material, the second connecting plate 1422 is made of a second material, and the valve seat 121 is made of a second material. The density of the second material is lower than that of the first material. Density refers to the mass per unit volume of a material; for the same volume, the second material is lighter than the first material. This arrangement not only helps to reduce the overall mass of the electric valve but also improves the reliability of the welded connections between the various components.

[0017] In this embodiment, the first material includes stainless steel, etc. The sleeve 16 has a first lower end face 16a, which is located at the lower end of the sleeve 16. The first lower end face 16a abuts against the first connecting plate 1421. The first connecting plate 1421 and the outer edge of the first lower end face 16a are laser welded or brazed for fixation. Of course, sealing can also be achieved through welding. The second material includes aluminum, aluminum alloy, etc. The valve seat portion 121 can be part of the valve seat assembly 12 or as the entire integral structure of the valve seat assembly 12. The valve seat portion 121 includes a first... The upper end face 121a is located at the upper end of the valve seat portion 121. The first upper end face 121a abuts against the second connecting plate 1422. The second connecting plate 1422 is laser-welded or brazed to the outer edge of the first upper end face 121a. Alternatively, a seal can be achieved through the welded surface. This arrangement ensures that the two welded parts are made of the same material, guaranteeing the reliability of the weld and reducing the overall weight of the valve component 1. In this embodiment, the second connecting plate 1422 is laser-welded to the valve seat portion 121. The first connecting plate 1421 and the second connecting plate 1422 are fixed by brazing, bonding, or other methods. For example, in this embodiment, the first connecting plate and the second connecting plate are brazed. Of course, a seal can also be achieved through the welded surface.

[0018] refer to Figures 1-6 The valve component 1 also includes a valve body 2, with at least a portion of the valve seat assembly 12 located in the valve body cavity 21. Both the first connecting plate 1421 and the second connecting plate 1422 are plate-shaped, specifically thin plates. The outer edges of the first connecting plate 1421 and the second connecting plate 1422 are aligned. The valve seat portion 121 is threadedly connected to the valve body 2. The connecting plate 142 has a mating portion 142c for threaded connection. The mating portion 142c is located on the outer peripheral wall of the connecting plate 142. The mating portion 142c can serve as a point of force for assembly tools such as wrenches. Then, the valve component 1 is tightened and fixed to the valve body 2. The external shape of the cross-section of the outer contour of the connecting plate 142 can be square, hexagonal, staggered, or an irregular circle with parallel opposite sides for bearing force, etc., to facilitate the valve component... 1. Installation and fixing with valve body 2; The inner peripheral walls of the first connecting plate 1421 and the second connecting plate 1422 have a non-standard circular structure, such as a square, hexagonal or plum blossom shape, etc. The inner peripheral wall contours of the first connecting plate 1421 and the second connecting plate 1422 are the same or different. In this embodiment, the inner peripheral contours of the first connecting plate 1421 and the second connecting plate 1422 are the same. The main body 141 and the connecting plate 142 are fixed by plastic injection molding. Part of the inner periphery of the connecting plate 142 is covered by the injection molding of the main body 141. This can ensure the seal between the first connecting plate 1421 and the second connecting plate 1422, and at the same time increase the bonding strength between the main body 141 and the connecting plate 142 to prevent the connecting plate 142 from detaching from the main body 141 when subjected to force.

[0019] In this embodiment, reference Figures 2-6The main body 141 includes a first main body 1411 and a second main body 1412. The first main body 1411 includes a first positioning part 1411c and a second positioning part 1411d. Both the first positioning part 1411c and the second positioning part 1411d are located on the outer peripheral wall of the first main body 1411. The first positioning part 1411c is located at the end of the first main body 1411 away from the valve core assembly 13. The first positioning part 1411c is located on the upper side of the second connecting plate 1422. The first positioning part 1411c is fitted with the inner peripheral surface of the sleeve 16 through an interference fit, a clearance fit, or a transition fit. In this embodiment, the first positioning part 1411c is fitted with the inner peripheral surface of the sleeve 16 through an interference fit, which can provide a suitable mounting surface for the nut assembly 14. The guide plate 1421 is located outside the outer edge of the first lower end face 16a along the radial direction of the valve component 1 for positioning the valve seat assembly 12. The second positioning part 1411d is located below the first connecting plate 1421. The valve seat assembly 12 includes a valve seat cavity 122. The second positioning part 1411d is press-fitted, clearance-fitted, or transition-fitted with the wall forming the valve seat cavity 122. In this embodiment, the second positioning part 1411d is press-fitted with the wall forming the valve seat cavity 122 to ensure the coaxiality of the nut assembly 14 and the valve seat assembly 12 during press-fitting and to ensure consistent welding positioning. A portion of the second connecting plate 1422 is located outside the outer edge of the first upper end face 121a along the radial direction of the valve component 1. In this embodiment, both the first lower end face 16a and the first upper end face 121a are planar, or mostly planar, but at least the contact area is planar. The first connecting plate 141 is welded perpendicularly to the outer peripheral surface of the sleeve 16. This arrangement greatly reduces the assembly process. The first main body 1411 includes a relief groove 1411e, which is located on the side of the first main body 1411 near the first connecting plate 1421. The relief groove 1411e is a groove of the first positioning part 1411c extending inward along the radial direction of the valve component 1. The provision of the relief groove 1411e can reduce the influence of welding temperature on the main body 141. The second main body 1412 of the main body 141 is closer to the sleeve 16 than the first main body 1411. The outer diameter of the second main body 1412 is generally smaller than that of the first main body 1411. The second main body 1412 is roughly cylindrical. The valve core assembly 13 includes a rod member 15 and a valve core body 131. The rod member 15 and the valve core body 131 are connected. In this embodiment, the outer peripheral wall of the rod member 15 is provided with an external thread, and the inner peripheral wall of the second main body 1412 has an internal thread that mates with the external thread of the rod member 15. The first main body 1411 has a guide groove 1411b. A portion of the valve core body 131 is located in the guide groove 1411b. The inner peripheral wall of the guide groove 1411b is in contact with or has a small clearance fit with the valve core body 131. The guide groove 1411b can ensure the coaxiality of the main body 141 and the valve core body 131, and provide guidance for the valve core body 131 to move along the axial direction of the valve component 1.

[0020] refer to Figures 2-6 The valve component 1 includes a sealing assembly 17, which abuts against and seals the wall forming the valve seat cavity 122. The valve seat assembly 12 includes a boss portion 123, which is a portion of the wall forming the valve seat cavity 122 that protrudes inward along the radial direction of the valve component 1. The boss portion 123 has a stepped surface 123a, which is located on the upper end face of the boss portion 123. Along the axial direction of the valve core assembly 13, the sealing assembly 17 is limited between the lower end of the nut assembly 14 and the stepped surface 123a. That is, the sealing assembly 17 can be located between the lower end face of the main body portion 141 and the stepped surface 123a. The stepped surface 123a restricts the lower displacement of the sealing assembly 17. Alternatively, the sealing assembly 17 is located in the limiting groove of the first main body portion 1411. The limiting groove is set to expand outward along the radial direction from the inner peripheral wall of the first main body portion 1411. The stepped surface 123a blocks the downward opening of the sealing assembly 17. Along the radial direction of the valve core assembly 13, the sealing assembly 17 is located on the outer periphery of the valve core body 131. The outer peripheral wall of the valve core assembly 13 contacts and seals with the sealing assembly 17. This arrangement reduces the installation difficulty of the sealing assembly 17 and improves the installation flexibility of the sealing assembly 17. The boss portion 123 of the valve seat assembly 12 has a first guide section 123b, which is located on the inner peripheral wall of the boss portion 123. The first guide section 123b guides and cooperates with the valve core body 131, which can be a contact or small clearance fit, etc. The first guide section 123b ensures the concentricity of the valve core body 131 and the valve port portion 1211 in abutment and sealing.

[0021] In this embodiment, the valve seat assembly 12 is integrally formed, that is, the valve port 1211 is located on the valve seat assembly 12. The entire valve seat assembly 12 is made of a second material, which helps to reduce the overall weight and cost of the valve seat assembly 12, thereby reducing the overall weight and cost of the valve component 1. In other embodiments, the valve seat assembly 12 can be formed separately and then fixedly connected. In this case, the valve seat portion 121 can be made of a second material, and other parts of the valve seat assembly 12 can be made of a second material, a first material, or other feasible materials. The valve component 1 also has a balance channel 5, which is located on the central axis of the valve core body 131. The balance channel 5 has an opening at the lower end of the valve core body 131. The balance channel 5 can balance the pressure on the upper and lower sides of the valve core body 131. In this embodiment, the main body 141 of the nut assembly 14 also includes a first balance hole 51. Through the cooperation of the balance channel 5 and the first balance hole 51, the pressure balance between the cavity formed by the outlet channel 125 and the cavity formed by the sleeve 16 can be achieved, which helps to reduce the valve opening resistance and thus reduce the driving force for the operation of the valve component 1.

[0022] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. An electrically operated valve characterised in that, The electric valve comprises a nut assembly (14), a valve seat assembly (12) and a sleeve (16), the nut assembly (14) comprises a connecting plate (142), the connecting plate (142) comprises a first connecting plate (1421) and a second connecting plate (1422), the first connecting plate (1421) is away from the valve seat assembly (12) relative to the second connecting plate (1422), the first connecting plate (1421) is fixedly connected with the second connecting plate (1422), and the first connecting plate (1421) is welded with the sleeve (16); the first connecting plate (1421) is made of a first material, the second connecting plate (1422) is made of a second material, and the density of the second material is smaller than that of the first material; the valve seat assembly (12) comprises a valve seat part (121), the valve seat part (121) is made of the second material, and the second connecting plate (1422) is welded with the valve seat part (121).

2. The motorized valve of claim 1, wherein, The second material comprises aluminum or aluminum alloy, and the second connecting plate (1422) is laser welded or brazed with the valve seat part (121); the sleeve (16) is made of the first material, the first material comprises stainless steel, and the first connecting plate (1422) is laser welded or brazed with the sleeve (16).

3. The motorized valve of claim 2, wherein, The valve seat part (121) comprises the first upper end face (121a), the first upper end face (121a) is located at the upper end of the valve seat part (121), the first upper end face (121a) abuts against the second connecting plate (1422), and part of the second connecting plate (1422) is located outside the outer edge of the first upper end face (121a) in the radial direction of the electric valve; and the second connecting plate (1422) is laser welded or brazed with the outer edge of the first upper end face (121a).

4. The motorized valve of claim 2, wherein, The sleeve (16) has a first lower end face (16a), the first lower end face (16a) is located at the lower end of the sleeve (16), the first lower end face (16a) abuts against the first connecting plate (1421), and part of the first connecting plate (1421) is located outside the outer edge of the first lower end face (16a) in the radial direction of the electric valve; and the first connecting plate (1421) is laser welded or brazed with the outer edge of the first lower end face (16a).

5. The motorized valve according to any one of claims 1-4, wherein, The first connecting plate (1421) and the second connecting plate (1422) are both plate-shaped, the lower end face of the first connecting plate (1421) is fixedly connected with the upper end face of the second connecting plate (1422), and the first connecting plate (1421) is brazed or adhesively fixed with the second connecting plate (1422).

6. The motorized valve of claim 5, wherein, The outer edge of the first connecting plate (1421) is arranged in alignment with the outer edge of the second connecting plate (1422), the shape of the outer circumferential surface of the connecting plate (142) comprises a square, or a hexagon, or a quincunx; the inner side wall of the first connecting plate (1421) is in a non-standard circular structure, the inner side wall of the second connecting plate (1422) is in a non-standard circular structure, the nut assembly (14) further comprises a main body portion (141), the connecting plate (142) is fixed with the main body portion (141) by injection molding, and the main body portion (141) covers the inner side portion of the connecting plate (142).

7. The motorized valve according to any of claims 1-6, characterized in that, The electric valve further comprises a valve body (5), at least part of the valve seat assembly (12) is located in the inner cavity formed by the valve body (5), the valve seat portion (121) is fixedly connected with the valve body (5) through threads, and the connecting plate (142) has a matching portion (142c) located on the outer circumferential wall of the connecting plate (142) or on the upper end face of the connecting plate (142). An external tool can cooperate with the matching portion (142c) to threadedly tighten and fix the valve seat assembly (12) and the valve body (5).

8. The motorized valve of claim 7, wherein, The main body portion (141) comprises a first main body portion (1411), the first main body portion (1411) comprises a first positioning portion (1411c) located on the outer circumferential wall of the first main body portion (1411), the first positioning portion (1411c) is located on the upper side of the second connecting plate (1422), and the first positioning portion (1411c) is in interference fit, clearance fit or interference fit with the inner circumferential surface of the sleeve (16).

9. Motorised valve according to claim 7 or 8, characterised in that The first main body portion (1411) further comprises a second positioning portion (1411d) located on the outer circumferential wall of the first main body portion (1411), the second positioning portion (1411d) is located on the lower side of the first connecting plate (1421), the valve seat assembly (12) comprises a valve seat inner cavity (122), and the second positioning portion (1411d) is in interference fit, clearance fit or interference fit with the wall forming the valve seat inner cavity (122).

10. The motorized valve according to any one of claims 1-9, wherein, The valve core assembly (13) comprises a valve core body (131), the valve seat assembly (12) comprises a valve port portion (1211), the valve core body (131) can be in sealing cooperation with the valve port portion (1211), the electric valve further comprises a sealing assembly (17), the valve seat assembly (12) comprises a boss portion (123), the boss portion (123) is a part of the wall forming the valve seat inner cavity (122) and protrudes inward along the radial direction of the electric valve, the boss portion (123) has a stepped surface (123a), along the axial direction of the valve core assembly (13), the sealing assembly (17) is limited between the lower end portion of the nut assembly (14) and the stepped surface (123a), and along the radial direction of the valve core assembly (13), the outer circumferential wall of the valve core assembly (13) is in contact with the sealing assembly (17).

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