Electric valve

Abstract

According to the technical scheme, the electric valve comprises the first connecting piece, the first connecting piece is fixedly connected with the valve seat in a welded mode, and the first connecting piece is fixedly connected with the stator assembly in a hot melting riveting mode. The stator assembly and the first component can form a whole which is relatively compact in structure and relatively reliable in structural connection strength, damage in the transportation process is avoided, fixed installation of the valve assembly and the valve body is facilitated, and miniaturization of products is facilitated.

Description

[0001] (This application is a divisional application of the Chinese invention patent application with a filing date of September 29, 2018, application number 201811146859.8, and titled “Electric Valve and Thermal Management Component”)

Technical field

[0002] The present invention relates to the technical field of fluid control, and in particular to a flow regulating device. [Background Technology]

[0003] With increasing demands for control accuracy, electric valves are increasingly being adopted as flow control devices. Electric valves consist of a valve assembly and a valve body. The limiting structures of the valve assembly and valve body affect the performance of the electric valve. Furthermore, the relatively fragmented design of the valve assembly hinders the connection between the valve assembly and the valve body. [Summary of the invention]

[0004] An object of the present invention is to provide an electric valve, which is beneficial to improving the structural compactness of the valve assembly and improving the overall structural connection strength of the valve assembly.

[0005] The present invention provides a technical solution: an electric valve, the electric valve comprising a valve assembly and a valve body, the valve assembly and the valve body being connected, the valve assembly comprising a stator assembly, a first component, the first component comprising a rotor assembly, a sleeve, a valve seat, a valve body and a valve core, the stator assembly being located on the outside of the rotor, the rotor assembly being located on the inside of the sleeve, the valve seat having a valve port, the rotor being able to drive the valve core to move relative to the valve port, the electric valve also comprising a limiter, at least part of the valve seat being inserted into the valve body, the valve assembly comprising a recess formed on the outer periphery of the valve seat, the limiter extending into the valve body and inserted into the recess, thereby limiting the axial displacement of the valve assembly relative to the valve body; the electric valve comprising a first connecting member, the first connecting member being fixedly connected to the valve seat by welding, and the first connecting member being fixedly connected to the stator assembly by hot-melt riveting.

[0006] In a technical solution provided by the present invention, the electric valve includes a first connecting member, which is fixedly connected to the valve seat by welding, and the first connecting member is fixedly connected to the stator assembly by hot-melt riveting. In this way, the stator assembly and the first component can form a whole with a relatively compact structure and relatively reliable structural connection strength, thereby avoiding damage during transportation, facilitating the fixed installation of the valve assembly and the valve body, and being conducive to the miniaturization of the product.

Brief Description of the Drawings

[0007] Figure 1 1 is a schematic diagram of an embodiment of the electric valve provided by the present invention;

[0008] Figure 2 yes Figure 1 A schematic cross-sectional view of the electric valve shown;

[0009] Figure 3 yes Figure 1 An exploded structural diagram of the electric valve shown;

[0010] Figure 4 yes Figure 1 A schematic structural diagram of a first embodiment of the middle valve assembly from one perspective;

[0011] Figure 5 yes Figure 4 A schematic cross-sectional view of a valve assembly;

[0012] Figure 6 yes Figure 4 An exploded structural diagram of the valve assembly;

[0013] Figure 7 yes Figure 4 A schematic diagram of a combined structure of the first component and the first connecting member;

[0014] Figure 8 yes Figure 7 A cross-sectional structural diagram of ;

[0015] Figure 9 yes Figure 7 A structural schematic diagram of the first component;

[0016] Figure 10 7 is a schematic diagram of a three-dimensional structure of a first embodiment of the first connecting member;

[0017] Figure 11 yes Figure 7 A schematic diagram of the structure of the first connecting member before the protruding portion is stamped;

[0018] Figure 12 yes Figure 7 A schematic three-dimensional structural diagram of a second embodiment of the first connecting member;

[0019] Figure 13 yes Figure 4 A structural schematic diagram of the valve assembly from another perspective;

[0020] Figure 14 yes Figure 13 A schematic structural diagram of a front view of a valve assembly;

[0021] Figure 15 is a schematic three-dimensional structural diagram of a second embodiment of the valve assembly;

[0022] Figure 16 is a schematic three-dimensional structural diagram of a third embodiment of the valve assembly;

[0023] Figure 17 is a schematic three-dimensional structural diagram of a fourth embodiment of the valve assembly;

[0024] Figure 18 yes Figure 17 A schematic cross-sectional view of the valve assembly;

[0025] Figure 19 is a schematic three-dimensional structural diagram of a fifth embodiment of the valve assembly;

[0026] Figure 20 yes Figure 1 A three-dimensional structural diagram of the middle valve body;

[0027] Figure 21 yes Figure 1 A structural diagram of the electric valve from another perspective;

[0028] Figure 22 yes Figure 20 A schematic diagram of a cross-sectional structure of a valve body;

[0029] Figure 23 21 is a schematic cross-sectional view of the matching portion of the stopper and the valve body;

[0030] Figure 24 yes Figure 21 A schematic diagram of a three-dimensional structure of a limiting member in FIG.

[0031] Figure 25 yes Figure 1 Another cross-sectional structural schematic diagram of the electric valve shown;

[0032] Figure 26 yes Figure 1 A schematic structural diagram of a sixth embodiment of the middle valve assembly from one perspective;

[0033] Figure 27 This is a structural diagram of an embodiment of the thermal management component provided by the present invention;

[0034] Figure 28 It is a structural schematic diagram of the second embodiment of the first component. [Specific implementation method]

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0036] The electric valve in this embodiment is mainly used in a refrigeration system, specifically in the field of flow control, and can be used to adjust the flow of a working medium in the refrigeration system. Figure 1This is a cross-sectional structural diagram of the first embodiment of the electric valve provided by the present invention. The concepts of "up and down" in the following description are the same as those in the Figure 1 The upper and lower parts of the figure correspond to each other.

[0037] See also Figure 1 、 Figure 2 as well as Figure 3 In this embodiment, the electric valve 100 includes a valve assembly 101 and a valve body 102. The valve assembly 101 and the valve body 102 are fixedly connected or detachably connected. Of course, the valve body 102 can also be fixedly connected to the heat exchanger or formed as one piece, and then the valve assembly 101 is connected to the valve body 102. Figure 27 The mounting portion includes a valve body 102, and the mounting portion may also be other structures designed by the user as required.

[0038] The valve assembly 101 includes a stator assembly 110, a first component 103 and a control unit 104. In this embodiment, the control unit 104 is relatively limited to the stator assembly 110, the first component 103 is relatively limited to the valve body 102, and the first component 103 is relatively limited to the stator assembly 110. That is, the first component 103 is directly or indirectly connected to the stator assembly 110, and the first component 103 is connected to the valve body 102, so that the valve assembly forms an integral whole.

[0039] The stator assembly 110 includes a coil 1101 and a frame 1102. The frame 1102 provides support for the winding of the coil 1101. Figure 2 、 Figure 3 In this embodiment, valve assembly 101 further includes an injection molded body 105. This body 105 is formed by injection molding. In this embodiment, the body 105 includes components such as a coil 1101 and a frame 1102 as injection-molded inserts. An insulating layer 1103 for the stator assembly 110 is formed around the coil 1101 and frame 1102 to protect the stator assembly 110 from corrosion by the working medium or air. The control unit 104 includes an electrical control box 190 and a circuit board assembly 130. The electrical control box 190 is securely connected to the stator assembly 110 by welding. The circuit board assembly 130 is arranged inside the electrical control box 190. The circuit board assembly 130 is electrically connected to the coil 1101, and the circuit board assembly 130 can be electrically connected to an external signal source. The valve assembly 103 includes a control unit 104. The control unit 104 controls the valve assembly or the electric valve, which is beneficial to improving the control accuracy and efficiency of the valve assembly. The stator assembly 110 is fixedly connected to the electrical control box 190. In this embodiment, the stator assembly 110 and the electrical control box 190 are ultrasonically welded.

[0040] Combine Figure 2 and Figure 8The first component 103 includes a rotor assembly 120, a sleeve 140, a valve seat 150, a valve core 170, and a transmission device 180. The rotor assembly 120 is located inside the sleeve 140, and the stator assembly 110 is located outside the sleeve 140. That is, the sleeve 140 separates the rotor assembly 120 and the stator assembly 110. The rotor assembly 120 drives the valve core 170 to move through the transmission device 180. The valve seat 150 is directly or indirectly fixedly connected to the sleeve 140. In this embodiment, due to the different materials of the sleeve 140 and the valve seat 150, the valve seat 150 and the sleeve 140 are fixedly connected via an adapter 154. In this embodiment, the valve assembly 103 is limited and detachably connected to the valve body 102 by the valve seat 150.

[0041] Combine Figure 7 and Figure 8 The valve assembly 101 further includes a first connecting member 1, which is fixedly connected to the valve seat 150 by welding; or the first connecting member 1 and the valve seat 150 are integrally formed, such as Figure 28 shown; combined Figure 4 、 Figure 6 , the stator assembly 110 is fixedly connected to the first connecting member 1, so that the first connecting member 1 is fixedly connected to the stator assembly 110 and the first component 103; thus, the valve assembly 103 forms a whole. Figure 1 、 Figure 3 The stator assembly 110, the first component 103 and the first connector 1 are fixedly connected to the valve body 102 as a whole, so that the user can select the valve body according to needs. Figure 5 In this embodiment, the valve seat 150 includes a side wall 151, and a recess 152 is formed on the outer periphery of the side wall 151. The recess 152 can be used to cooperate with the limiter 5 to limit the axial displacement of the valve assembly relative to the valve body. In the first embodiment, the second embodiment, the third embodiment, the fourth embodiment and the fifth embodiment of the valve assembly, the recess 152 is an annular groove formed on the outer periphery of the valve seat 150. In the above embodiments, the limiter 5 cooperates with the recess 152 to only limit the axial movement of the valve assembly 101 relative to the valve body 102. In the sixth embodiment, as shown in FIG. Figure 26 As shown, the recess 152 is a non-annular structure, and the recess 152 can cooperate with the limiter 5 to limit the rotation and axial movement of the valve assembly 101 relative to the valve body 102. For example, the recess 152 includes an extension portion, and the extension portion has the same extension direction as the limiter. In the installation direction of the limiter, the length of the extension portion and the limiter fitting is greater than 2 mm. The recess 152 includes a first recess and a second recess. The extension direction of the first recess is the same as the extension direction of the second recess. The first recess and the second recess are located on both sides of the valve seat, and the first recess and the second recess are not connected.

[0042] See also Figures 10 to 16The first connector 1 includes a main body 12 and a protruding portion 13. The main body 12 is annular, and the center hole 11 is located at the center of the main body 12. The protruding portion 13 is formed by stamping and / or bending. The protruding portion 13 includes a free end 131 and a connecting end 132. The connecting end 132 is fixedly connected to the main body 12, and the protruding portion 13 protrudes from the main body 12.

[0043] Figures 10 to 15 In the embodiment, the protrusion 13 is in sheet form and is formed by stamping and bending; Figure 10 and Figure 14 In the example, the number of protrusions is one, Figure 10 and Figure 11 In the embodiment, the vertical distance between the two sides of the protrusion is defined as the width w of the protrusion. The width w of the protrusion is the same between the connecting end 132 and the free end 131 within the manufacturing tolerance. Since the thickness of the protrusion is the same, that is, the cross-sectional area is the same, wherein the manufacturing tolerance is 1 mm. The stamping position 124 for forming the free end is located closer to the center of the first connecting member 1 than the connecting end 132, thereby preventing installation interference. Figures 12 to 14 In the embodiment, the vertical distance between the two sides of the protrusion is defined as the width w of the protrusion. The width of the protrusion at the free end is greater than the width of the protrusion at the connecting end, that is, the cross-sectional area of ​​the free end is smaller than the cross-sectional area of ​​the connecting end. The stamping position of the free end is closer to the center of the first connecting member than the connecting end, so as to prevent installation interference. Figures 12 to 14 Relative to Figure 10 The embodiment in the embodiment is conducive to improving the connection strength of the protrusion; Figure 15 There are three protrusions in the middle, and the structure is the same as Figures 12 to 14 The structure is the same as in the embodiment, which makes the limiting of the valve assembly and the valve body more stable.

[0044] Figure 16 In the embodiment, the protrusion 13 is cylindrical and formed by stamping. The protrusion 13 is stamped relative to the main body 12. The protrusion 13 includes a free end and a connecting end. The free end protrudes from the main body 12 and is separated from the main body 12. The connecting end is fixedly connected to the main body 12. The distance between the circle 134 where the connecting end of the protrusion 13 is located and the outer edge of the main body 12 is approximately the same as the distance between the through hole 121 and the outer edge of the main body 12.

[0045] See also Figure 17-18 ,and Figures 10 to 16The main difference lies in the first connecting member. In this embodiment, the first connecting member 1 includes a main body 12 and a center hole. The valve assembly 103 includes a positioning pin 13. The main body 12 includes a positioning hole 126. One end of the positioning pin 13 is inserted into the positioning hole 126, and the other end of the positioning pin 13 can extend into the limiting hole 42 of the valve body to limit the rotational displacement of the valve assembly relative to the valve body. In order to fix the positioning pin relative to the valve assembly, in this embodiment, the positioning pin 13 includes a cap 135 and a rod 136. The stator assembly 110 is formed with a receiving portion 1111. The cap 135 is received in the receiving portion 1111. The main body 12 and the cap 135 are arranged in abutment. The main body 12 limits the axial movement of the cap 135 relative to the stator assembly 110. The rod 136 passes through the positioning hole 126 and protrudes from different sides of the main body 12 and the cap 135. The rod 136 can extend into the limiting hole of the mounting portion to limit the rotational displacement of the valve assembly relative to the mounting portion. In this embodiment, the mounting portion is the valve body.

[0046] In the above embodiment, the main body 12 also includes at least one through hole 121, and the stator assembly 110 also has a protrusion 1105 that cooperates with the through hole 121. There are at least three protrusions 1105. The protrusions 1105 are integrally formed with the insulating layer of the stator assembly 110 or the protrusions 1105 are formed separately and then fixedly connected to the stator assembly 110. The protrusions 1105 are made of thermoplastic material. The protrusions 1105 are inserted into the through hole 121 and the first connecting member 1 is fixedly connected to the stator assembly 110 by hot melt riveting. In order to improve the connection strength between the main body and the stator assembly, the through holes are evenly distributed along the circumference of the main body, and the number of the through holes is the same as the number of the protrusions. In the above embodiment, the number of the through holes is three.

[0047] like Figure 1-Figure 27 As shown, the first component 103 also includes a baffle portion 1031, which is integrally formed with the valve seat 150. In this embodiment, the baffle portion 1031 includes a flange portion 1032 and a step portion 1033. The outer diameter of the step portion 1033 is smaller than the outer diameter of the flange portion 1032. The first connecting member 1 is sleeved on the outer periphery of the step portion 1033 and abuts against the flange portion 1032. The first connecting member 1 is fixedly connected to the step portion 1033 and / or the flange portion 1032. In this embodiment, a weld can be formed at the connection between the first connecting member 1 and the step portion 1033 and / or the connection between the first connecting member 1 and the flange portion 1032 to fix the first connecting member 1 to the first component 103.

[0048] Figure 28 In the embodiment, the first connecting member 1 is integrally formed with the first component 103. Specifically, the first connecting member 1 is integrally formed with the valve seat 150. Other structures of the first component 103 are the same as those described above and will not be repeated again.

[0049] Combine Figures 13 to 16 The baffle portion 1031 is formed with a notch 1034 at the portion corresponding to the protrusion 1105, which makes it easier to form the protrusion 1105. The protrusion 13 is arranged close to the outer edge of the baffle portion 1031, which is beneficial for utilizing the outer edge of the baffle portion to strengthen the strength of the protrusion 13. The protrusion 13 protrudes from the baffle portion 1031, that is, the length of the protrusion 13 is greater than the thickness of the baffle portion 1031.

[0050] Combine Figures 17 to 19 The baffle portion 1031 is formed with a notch 1034 at the portion corresponding to the protrusion 1105, which can make the formation of the protrusion 1105 easier. The rod portion 136 of the positioning pin is arranged close to the outer edge of the baffle portion 1031 or the rod portion 136 of the positioning pin is arranged through the baffle portion 1031. The rod portion 136 protrudes from the baffle portion 1031, and the length of the rod portion 136 is greater than the thickness of the baffle portion 1031.

[0051] like Figure 2 As shown, the valve body 102 has a first flow channel 1601 and a second flow channel 1602, and the first flow channel 1601 and the second flow channel 1602 are connected through the valve port 1502. The valve port 1502 can be formed on the valve body 102 or a component having the valve port 1502 is fixedly arranged with the valve body 102. In this embodiment, the valve seat 150 has the valve port 1502, and the valve seat 150 is fixedly arranged relative to the valve body 102, which can facilitate the processing of the valve port 1502; the rotor assembly 120 can drive the valve core 170 Movement, the valve core 170 can move relatively close to or away from the valve port 1502, so that the flow cross-sectional area of ​​the valve port 1502 changes, and then the connecting cross-sectional area between the first flow channel 1601 and the second flow channel 1602 changes, thereby adjusting the flow of the system where the valve assembly is located, and the valve seat 150 is also provided with a connecting hole 1503, which can connect the inner cavity of the valve seat 150 and the first flow channel 1601, and the connecting hole 1503 can connect the inner cavity of the valve seat 150 and the second flow channel 1602.

[0052] See also Figure 2 For the convenience of description, the valve body 102 and the stator assembly 110 of the electric valve are defined as being arranged along the axial direction of the electric valve, and the axis L is defined, and the direction perpendicular to the axis L is defined as the radial direction of the electric pump; that is, the movement direction of the valve core 170 is axial, the valve core 170 moves up and down along the axis L, and the stator assembly 110 and the rotor assembly 120 are arranged along the radial direction of the electric valve.

[0053] Combine Figure 2 、 Figure 20 、 Figure 21 、 Figure 22 、 Figure 23The valve body 102 is provided with a first mounting cavity 1603 along the axis L, and at least a portion of the valve seat 150 extends into the first mounting cavity 1603. The valve seat 150 is fixedly mounted in the first mounting cavity 1603 of the valve body 102. The valve seat 150 includes a sidewall 151 having a recess 152 formed therein. The sidewall 151 cooperates with the valve body 102 to form the first mounting cavity 1603. The valve seat 150 is provided with a sealing ring 3 between the sidewall 1512 and the valve body 102 to reduce the risk of leakage of the electric valve. There are two sealing rings 3.

[0054] The valve body 102 also includes a mounting hole 41, the extension direction of the mounting hole 41 is perpendicular to the extension direction of the valve seat 150, the recess 152 includes an annular groove surrounding the outer periphery of the valve seat 150, the limit member 5 passes through the mounting hole 41 and extends into the recess 152, and part of the outer surface of the limit member 5 is arranged in abutment with the recess 152. The mounting hole 41 includes a first section 411 and a second section 412, which are connected to the mounting cavity 1603. At least a portion of the first section 411 is a threaded hole, and the second section 412 is a smooth hole. The limiting member 5 includes a first portion 51 and a second portion 52. At least a portion of the outer periphery of the second portion 52 is formed with an external thread, and the first portion 51 is a smooth rod. When the valve assembly 103 and the valve body 102 are assembled, the mounting hole 41 corresponds to the recess 152, the limiting member 5 extends into the mounting hole 41, the second portion 52 of the limiting member 5 extends into the threaded hole and is threadedly connected, and the first portion 51 extends into the second section 412 and is supported by the valve body 102. Figure 23 A portion of the second portion 52 extends into the recess 152 and contacts the wall forming the recess 152, thereby limiting the axial displacement of the valve seat 150 relative to the valve body 102. In this embodiment, there are two mounting holes, namely a first mounting hole and a second mounting hole, and two limiting portions, namely a first limiting member and a second limiting member. The first limiting member is inserted into the first mounting hole and threadedly connected to the valve body 102, and the second limiting member is inserted into the second mounting hole and threadedly connected to the valve body 102. The recess 152 is located between the first limiting member and the second limiting member. Part of the outer surface of the first limiting member contacts the recess to limit the position, and part of the outer surface of the second limiting member contacts the recess to limit the position. This makes the connection between the valve seat and the valve body more stable.

[0055] In a sixth embodiment, Figure 26As shown, the recess 152 is a non-annular structure, and the recess 152 can cooperate with the limiter 5 to limit the rotation and axial movement of the valve assembly 101 relative to the valve body 102. For example, the recess 152 includes an extension portion, and the extension portion has the same extension direction as the limiter 5. In the installation direction of the limiter 5, the length of the extension portion and the limiter 5 is greater than 2 mm. The recess 152 includes a first recess and a second recess. The extension direction of the first recess is the same as the extension direction of the second recess. The first recess and the second recess are located on both sides of the valve seat 150, and the first recess and the second recess are not connected. The limiting member 5 includes a first part 51 and a second part 52, and an external thread is formed on the outer periphery of at least a portion of the second part 52. The first part 51 is a smooth rod, and the mounting hole 41 includes a first section 411 and a second section 412. At least a portion of the first section 411 is a threaded hole, and the second section 412 is a smooth hole. The limiting member 5 includes a first limiting member and a second limiting member, and the mounting hole 41 includes a first mounting hole and a second mounting hole. The first limiting member is inserted into the first mounting hole and threadedly connected to the valve body 102, and a portion of the outer surface of the first limiting member contacts the first recess. The second limiting member is inserted into the second mounting hole and threadedly connected to the valve body 102, and a portion of the outer surface of the second limiting member contacts the second recess.

[0056] In another embodiment, the recess includes a first recess and a second recess, the extension direction of the first recess is the same as the extension direction of the second recess, the first recess and the second recess are located on both sides of the valve seat 102, the first recess and the second recess are not arranged in contact, the limiter 5 can also be a rod-shaped structure formed of plastic material, the limiter 5 includes a first limiter and a second limiter, the mounting hole 41 includes a first mounting hole and a second mounting hole, the first limiter is inserted into the first mounting hole and fixedly connected to the valve body by melting the end of the first limiter, part of the outer surface of the first limiter contacts the first recess for limitation, the second limiter is inserted into the second mounting hole and connected to the valve body by melting the end of the second limiter, part of the outer surface of the second limiter contacts the second recess for limitation.

[0057] In addition to the above structure, the position-limiting member 5 can be a retaining spring. The valve body is formed with a groove, the center of the groove being concentric with the center of the groove. The retaining spring extends into the groove. On the same circumference of the retaining spring, part of the inner circumference of the retaining spring abuts the groove, and part of the outer circumference of the retaining spring abuts the valve body corresponding to the groove. The position-limiting member can also be a circlip, which is placed in the groove formed in the corresponding part of the valve seat and the valve body to limit the axial movement of the valve seat relative to the valve body.

[0058] A limiting hole 42 is formed at the upper end of the valve body 102 , and the protrusion 13 can extend into the limiting hole 42 and limit the position relative to the valve body, thereby limiting the rotational displacement of the valve assembly relative to the valve body.

[0059] Figure 27In the figure, the thermal management component 10 includes a heat exchanger 20, a valve body 102 and a valve assembly 101. The valve assembly 101 is the valve assembly described above. The heat exchanger 20 includes a connecting port 201. The working medium enters or flows out of the heat exchanger 20 through the connecting port 201. The valve body 102 is fixedly connected to the heat exchanger 20. The valve body 102 includes a first flow channel and a second flow channel. The connecting port 201 is connected to the first flow channel or the second flow channel. The valve body is as described above. The valve body is formed with a first mounting cavity, and at least part of the valve seat is located in the first mounting cavity. The thermal management component includes a limiter, and the valve body includes a mounting hole. The limiter is inserted into the mounting hole. The limiter abuts against the side wall of the recess. The limiter limits the axial movement distance of the valve assembly relative to the valve body. The limiter is threadedly connected to the valve body.

[0060] 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 this specification has described the present invention in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An electric valve, comprising a valve assembly and a valve body, the valve assembly and the valve body being connected, the valve assembly comprising a stator assembly and a first component, the first component comprising a rotor assembly, a sleeve, a valve seat, a valve body, and a valve core, the stator assembly being located outside the rotor, the rotor assembly being located inside the sleeve, the valve seat having a valve port, and the rotor being capable of driving the valve core to move relative to the valve port, characterized in that: The electric valve also includes a limiter, at least a portion of the valve seat is inserted into the valve body, the valve assembly includes a recess formed on the outer periphery of the valve seat, the limiter extends into the valve body and is inserted into the recess, limiting the axial displacement of the valve assembly relative to the valve body; the electric valve includes a first connecting member, the first connecting member is fixedly connected to the valve seat by welding, and the first connecting member is fixedly connected to the stator assembly by hot melt riveting.

2. The electric valve according to claim 1, characterized in that The first component includes a flange portion and a step portion, the outer diameter of the step portion is smaller than the outer diameter of the flange portion, the first connecting piece is sleeved on the outer circumference of the step portion and abuts against the flange portion, and the first connecting piece is welded and fixed to the step portion and / or the flange portion.

3. The electric valve according to claim 1 or 2, characterized in that: The stator assembly includes a protrusion, and the first connecting member has a through hole. The protrusion is inserted into the through hole, and the first connecting member is fixedly connected to the stator assembly by hot melt riveting.

4. The electric valve according to any one of claims 1 to 3, characterized in that: The recess includes at least an extension portion, the limit member is in contact with the extension portion, and the limit member cooperates with the extension portion to limit the rotation of the valve assembly relative to the valve body. The valve body includes a mounting hole, the limit member passes through the mounting hole and extends into the recess, and part of the outer surface of the limit member is arranged in contact with the recess.

5. The electric valve according to claim 4, characterized in that: The recess includes a first recess and a second recess, the extension direction of the first recess is the same as the extension direction of the second recess, the first recess and the second recess are located on both sides of the valve seat, the first recess and the second recess are not connected, the limiter includes a second part, at least part of the outer periphery of the second part is formed with an external thread, the mounting hole includes a first section, at least part of the first section is a threaded hole, the limiter includes a first limiter and a second limiter, the mounting hole includes a first mounting hole and a second mounting hole, the first limiter is inserted into the first mounting hole and is threadedly connected to the valve body, and part of the outer surface of the first limiter is in contact with the first recess, the second limiter is inserted into the second mounting hole and is threadedly connected to the valve body, and part of the outer surface of the second limiter is in contact with the second recess.

6. The electric valve according to claim 4, characterized in that: The recess includes a first recess and a second recess, the extension direction of the first recess is the same as the extension direction of the second recess, the first recess and the second recess are located on both sides of the valve seat, the first recess and the second recess are not arranged in contact, the limiter is a rod-shaped structure formed of plastic material, the limiter includes a first limiter and a second limiter, the mounting hole includes a first mounting hole and a second mounting hole, the first limiter is inserted into the first mounting hole and fixedly connected to the valve body by melting the end of the first limiter, a portion of the outer surface of the first limiter contacts with the first recess for limiting the position, the second limiter is inserted into the second mounting hole and connected to the valve body by melting the end of the second limiter, a portion of the outer surface of the second limiter contacts with the second recess for limiting the position.

7. The electric valve according to claim 1, characterized in that: The recess includes an annular groove surrounding the outer circumference of the valve seat. The limiting member passes through the mounting hole and extends into the recess. Part of the outer surface of the limiting member is arranged to abut against the recess.

8. The electric valve according to claim 7, characterized in that: The limiting member includes a second part, and an external thread is formed on the outer periphery of at least part of the second part. The mounting hole includes a threaded hole. The limiting member includes a first limiting member and a second limiting member. The mounting hole includes a first mounting hole and a second mounting hole. The first limiting member is inserted into the first mounting hole and threadedly connected to the valve body, and the second limiting member is inserted into the second mounting hole and threadedly connected to the valve body. The recess is located between the first limiting member and the second limiting member. Part of the outer surface of the first limiting member is in contact with the recess to limit the position, and part of the outer surface of the second limiting member is in contact with the recess to limit the position.

9. The electric valve according to claim 1, characterized in that: The valve body is formed with a groove, the center of the recess is concentrically arranged with the center of the recess, the limiting portion is provided with a retaining spring, the retaining spring extends into the recess, and on the same circumference of the retaining spring, part of the inner circumference of the retaining spring abuts against the recess, and part of the outer circumference of the retaining spring abuts against the valve body corresponding to the recess.

10. The electric valve according to any one of claims 5 to 8, characterized in that: The mounting hole further includes a second section, which is coaxially arranged with the first section. One end of the limiting member passes through the first section and extends into the second section and is supported by the valve body.

Images