CN117823633A

CN117823633A - Electric valve

Info

Publication number: CN117823633A
Application number: CN202211204526.2A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2024-04-05
Also published as: WO2024067454A1

Abstract

The electric valve comprises a nut assembly, a valve seat assembly and a sleeve, wherein the sleeve is fixedly connected with the connecting portion, the valve seat assembly comprises a first valve seat portion, the first valve seat portion comprises a supporting portion and a crimping portion, the lower end portion of the connecting portion is in butt joint with the supporting portion, the supporting portion is used for limiting the connecting portion, at least part of the crimping portion is in butt joint with the connecting portion, at least part of the crimping portion is located above the connecting portion, and the crimping portion is used for limiting the connecting portion. The connecting portion and the valve seat assembly are limited through the compression joint portion, and the nut assembly is connected with the valve seat assembly in a simplified mode.

Description

Electric valve

Technical Field

The application relates to the technical field of fluid control, in particular to an electric valve.

Background

The electric valve comprises a nut component and a valve seat component, wherein the nut component is provided with a connecting plate, the nut component is welded and fixed with the valve seat component through the connecting plate, and thus, a welding procedure is required to be added, which is unfavorable for reducing the production cost, so that the connection of the nut component and the valve seat component is simplified, and the electric valve is a technical problem to be considered in the field of technology.

Disclosure of Invention

An object of the present application is to provide an electrically operated valve that facilitates simplifying the connection of a nut assembly to a valve seat assembly.

In order to achieve the above object, an embodiment of the present application adopts the following technical scheme:

the electric valve comprises a nut component, a valve seat component and a sleeve, wherein the nut component comprises a plastic piece and a connecting part, the connecting part is fixed with the plastic piece, and the sleeve is fixedly connected with the connecting part;

the valve seat assembly comprises a first valve seat portion, the first valve seat portion comprises a supporting portion and a pressure welding portion, the lower end portion of the connecting portion is in butt joint with the supporting portion, at least part of the pressure welding portion is in butt joint with the connecting portion, and at least part of the pressure welding portion is located above the connecting portion.

In the embodiment that this application provided, the motorised valve includes nut subassembly, disk seat subassembly and sleeve, and sleeve and connecting portion fixed connection, disk seat subassembly include first valve seat portion, and first valve seat portion includes supporting part and crimping portion, and the lower tip and the supporting part butt of connecting portion, supporting part carry out spacingly to the connecting portion like this, and at least part crimping portion and connecting portion butt, at least part crimping position are located the top of connecting portion, and crimping portion carries out spacingly to the connecting portion. The connecting portion and the valve seat assembly are limited through the compression joint portion, and the nut assembly is connected with the valve seat assembly in a simplified mode.

Drawings

FIG. 1 is a schematic elevational view of a first embodiment of an electrically operated valve provided herein;

FIG. 2 is a schematic cross-sectional view of the electrically operated valve of FIG. 1 taken along the A-A plane;

FIG. 3 is a schematic perspective view of one view of the valve assembly of FIG. 2;

FIG. 4 is a schematic elevational view of the valve member of FIG. 3;

FIG. 5 is a schematic cross-sectional view of the valve member of FIG. 4 taken along the plane B-B;

FIG. 6 is an enlarged schematic view of the portion A in FIG. 5;

FIG. 7 is a schematic cross-sectional view of the valve seat assembly of FIG. 2 after crimping;

FIG. 8 is a schematic cross-sectional structural view of the valve seat assembly of FIG. 2 from a perspective prior to crimping;

FIG. 9 is a schematic cross-sectional view of the first valve seat portion of FIG. 2 from one perspective prior to crimping;

FIG. 10 is a schematic cross-sectional structural view of the second valve seat portion of FIG. 2 from one perspective;

FIG. 11 is a schematic elevational view of the nut assembly of FIG. 2;

FIG. 12 is a schematic cross-sectional view of the nut assembly of FIG. 11 taken along the plane C-C;

FIG. 13 is a schematic perspective view of a view of the connection portion of FIG. 12;

FIG. 14 is a schematic top view of the connection of FIG. 13;

FIG. 15 is a schematic elevational view of a second embodiment of an electrically operated valve provided herein;

FIG. 16 is a schematic cross-sectional view of the electrically operated valve of FIG. 15 taken along the D-D plane;

FIG. 17 is an enlarged schematic view of the portion B in FIG. 16;

FIG. 18 is a schematic cross-sectional structural view of the valve member of FIG. 16 from one perspective;

FIG. 19 is a cross-sectional structural illustration of one view of the nut assembly of FIG. 16;

FIG. 20 is a schematic perspective view of the connection of FIG. 19 from one perspective;

FIG. 21 is a schematic top view of the connection of FIG. 20;

FIG. 22 is an enlarged schematic view of another embodiment of portion B of FIG. 16;

FIG. 23 is a schematic cross-sectional view of a third embodiment of an electrically operated valve provided herein;

fig. 24 is an enlarged schematic view of the portion C in fig. 23;

FIG. 25 is a schematic cross-sectional structural view of the sleeve of FIG. 23 from one perspective;

fig. 26 is an enlarged schematic view of a third embodiment of the electric valve of section C of fig. 23;

FIG. 27 is a schematic elevational view of a fifth embodiment of an electrically operated valve provided herein;

FIG. 28 is a schematic cross-sectional view of the electrically operated valve of FIG. 27 taken along the plane E-E;

FIG. 29 is a schematic elevational view of the valve member of FIG. 28;

FIG. 30 is a schematic cross-sectional view of the valve member of FIG. 29 taken along the plane F-F;

FIG. 31 is a schematic cross-sectional structural view of one view of the nut assembly of FIG. 28;

FIG. 32 is a schematic perspective view of the connection portion of FIG. 31 from one perspective;

FIG. 33 is a schematic top view of the connection of FIG. 32;

FIG. 34 is a schematic elevational view of a sixth embodiment of an electrically operated valve provided herein;

FIG. 35 is a schematic cross-sectional view of the electrically operated valve of FIG. 34 taken along the G-G plane;

FIG. 36 is a schematic cross-sectional view of the electrically operated valve of FIG. 34 taken along the H-H plane;

FIG. 37 is a schematic view of the valve member and connection assembly combination of FIG. 34;

FIG. 38 is a schematic perspective view of a view of the valve member of FIG. 34;

FIG. 39 is a schematic elevational view of a seventh embodiment of an electrically operated valve provided herein;

FIG. 40 is a schematic cross-sectional view of the electrically operated valve of FIG. 39 taken along the plane I-I;

FIG. 41 is a schematic cross-sectional structural view of one perspective of the valve member of FIG. 40;

FIG. 42 is a schematic perspective view of the nut assembly of FIG. 41;

FIG. 43 is a schematic elevational view of the nut assembly of FIG. 41;

FIG. 44 is a schematic perspective view of the connection portion of FIG. 43 from one perspective;

FIG. 45 is a schematic top view of the connection of FIG. 43;

fig. 46 is a schematic sectional structural view of a valve member of another variation of the sixth embodiment of the electrically operated valve from one perspective.

Detailed Description

The invention is further described with reference to the drawings and the specific embodiments below:

referring to fig. 1-14, a first embodiment of an electrically operated valve is illustrated, in which the electrically operated valve 100 includes an electronic expansion valve, and may be used in refrigerant systems such as commercial or vehicular thermal management systems or other systems requiring thermal management such as battery thermal management, thermal management of electrical devices, etc.

Referring to fig. 1-2, the electric valve 100 includes a valve body 11, a valve member 12, and a coil assembly 13, in this embodiment, the valve member 12 is fixedly connected to the valve body 11, the coil assembly 13 is fixedly connected to the valve body 11, the valve body 11 has a valve cavity 115, and at least part of the valve member 12 is located in the valve cavity 115; of course, in other embodiments, the coil assembly 13 may be fixedly connected to the valve member 12, and then fixedly connected to the valve body 11 after the two are assembled, in this embodiment, the valve body 11 is a separate valve block, and in other embodiments, the valve body 11 may also be part of a system, for example, a heat exchanger or a runner plate. The coil assembly 13 comprises a stator assembly 131 and an injection molded body 132, the injection molded body 132 covering at least part of the stator assembly 131 by injection molding, the coil assembly 13 having a cavity 133, at least part of the valve member 12 being located in the cavity 133. The valve component 12 comprises a valve seat component 4, a nut component 5, a sleeve 6, a rotor component 121 and a valve core component 122, at least part of the sleeve 6 is positioned in a cavity 133, a stator component 131 is positioned on the outer side of the sleeve 6, the rotor component 121 is positioned on the inner side of the sleeve 6, the valve core component 122 is connected with the rotor component 121, a preset current is supplied to the stator component 131, an excitation magnetic field can be generated, the rotor component 121 is driven to rotate, the rotor component 121 drives the valve core component 122 to rotate, and the valve core component 122 is in threaded fit with the nut component 5 to convert the rotation of the rotor component 121 into axial motion of the valve core component 122 relative to the valve seat component 4. In the present embodiment, the spool assembly 122 includes a lead screw portion 1221 and a spool portion 1222, the lead screw portion 1221 and the spool portion 1222 are configured as separate structures and connected, the connection method includes a fixed connection, a limit connection, or a transmission connection, the lead screw portion 1221 is formed with an external thread 81, the nut assembly 5 is formed with an internal thread 82 engaged with the external thread, the lead screw portion 1221 is engaged with the nut assembly 5 by a thread, and the rotation of the rotor assembly 121 is converted into an axial motion of the lead screw portion 1221 relative to the nut assembly 5, however, in other embodiments, the lead screw portion 1221 and the spool portion 1222 may be configured as an integral structure or an integral structure. The valve seat assembly 4 has a valve port 44, the valve port 44 has a valve port 441, the valve element assembly 122 can axially move relative to the valve port 441, the valve element 1222 of the valve element assembly 122 is matched with the valve port 441, and the flow area of the valve port 441 or the opening degree of the valve port 441 is adjusted, so that the flow rate of the refrigerant can be adjusted. For convenience of description, the upper and lower directions are the upper and lower directions of the drawing in fig. 1 of the specification, and the upper and lower directions only represent relative positions and do not represent the actual use state of the product. For example, in fig. 1, the coil assembly 13 is located above the valve body 11, which does not represent that the coil assembly 13 must be located above the valve body 11 in practical use, because the electric valve may be mounted laterally or obliquely, and if mounted laterally, the coil assembly is located on the left or right side of the valve body, which is within the scope of protection of the present application.

Referring to fig. 2-6 and fig. 10-13, in this embodiment, the nut assembly 5 includes a plastic part 51 and a connecting portion 52, where the connecting portion 52 is fixed to the plastic part 51, and the fixing manner includes injection molding, interference or gluing, or interference bonding gluing, in this embodiment, the connecting portion 52 is an injection molding insert, and the nut assembly 5 is formed by injection molding, and the plastic part 51 covers part of the connecting portion 52, as in this embodiment, the plastic part 51 covers an inner part of the connecting portion 52. In this embodiment, the material of the connecting portion 52 is a metal material, the material of the sleeve 6 is a metal material, such as a stainless steel material, and the plastic member 51 may specifically be a special engineering plastic or a composite material with a certain strength, such as a mechanically reinforced polyetheretherketone material (PEEK) or a modified polyetheretherketone material (PEEK), or a mechanically reinforced polyphenylene sulfide (PPS) or a modified polyphenylene sulfide (PPS) material. In the present embodiment, the plastic part 51 is of an integral structure, and is integrally injection molded. In other ways, the plastic part 51 may be formed separately, and the plastic part 51 may be formed through a fixed connection or a limited connection. In this embodiment, the connecting portion 52 has a fixing reinforcing portion 523 at a portion connected to the plastic member 51, the fixing reinforcing portion 523 is located at an inner side portion of the connecting portion 52, and the fixing reinforcing portion 523 is at least partially covered by the plastic member 51, for example, an inner periphery of the connecting portion 52 has a non-circular structure, for example, an inner side shape of an inner side wall section may be square, hexagonal or an irregular circular shape with a straight edge of a portion or a quincuncial shape, so that the connecting strength between the connecting portion 52 and the plastic member 51 can be improved, and the connecting portion 52 can be prevented from rotating in a circumferential direction relative to the plastic member 51 by a circular structure relative to a side wall of the connecting portion 52. In other embodiments, the inner periphery of the connecting portion 52 may be provided with a groove structure, a protrusion structure, a knurling structure or the like capable of achieving a similar function, a through hole, a groove, a protrusion or the like may be provided in the axial direction, or a combination of the foregoing structures may be provided.

Referring to fig. 2 and 5, in this embodiment, the sleeve 6 is fixedly connected to the connection portion 52, specifically, in this embodiment, the sleeve 6 includes an opening 61, a sleeve main body 62, and a sleeve top 63, the opening 61 is close to the connection portion 52 relative to the sleeve top 63, the sleeve 6 has an opening at the opening 61, the sleeve top 63 closes the upper end of the sleeve 6, the material of the connection portion 52 is a stainless steel material, the material of the sleeve 6 is a stainless steel material, the opening 61 of the sleeve 6 is fixed to the connection portion 52 by welding, the welding method includes laser welding, soldering, and the like, and in this embodiment, the opening 61 of the sleeve 6 is fixed to the connection portion 52 by laser.

Referring to fig. 2 to 9, the valve seat assembly 4 includes a first valve seat portion 41, the first valve seat portion 41 includes a pressure-bonding section 411 and a support section 412, and a lower end portion of the connecting portion 52 abuts against the support section 412, such that the support section 412 limits the connecting portion 52, and limits a lowermost position of the connecting portion 52 relative to the first valve seat portion 41, and the lower end portion of the connecting portion 52 abuts against the support section 412 including direct abutment or indirect abutment. After the riveting portion is riveted, at least part of the crimping portion 411 extends toward the central axis direction of the nut assembly 5, at least part of the crimping portion 411 abuts against the connecting portion 52, at least part of the crimping portion 411 is located above the connecting portion 52, the crimping portion 411 limits the connecting portion 52 to move in the direction that the electric valve axially moves away from the valve seat assembly 4, and the connecting portion 52 is fixed to the first valve seat portion 41 by the crimping portion 411. The nut assembly 5 and the valve seat assembly 4 can be simplified through the arrangement, the welding connection of the nut assembly 5 and the valve seat assembly 4 can be relatively realized, one welding process can be reduced, and the production cost is reduced.

Referring to fig. 2-9, in the present embodiment, the valve seat assembly 4 further includes a second valve seat portion 42, and the first valve seat portion 41 is fixedly or limitedly connected to the second valve seat portion 42. The material of the first valve seat portion 41 is an aluminum material, and the weight of the valve seat assembly 4 can be reduced by adopting the aluminum material, so that the overall weight of the electric valve is reduced, and simultaneously, the riveting bending of the crimping portion 411 can be facilitated, and the riveting difficulty is reduced. In the present embodiment, the pressure-bonding section 411 is located at the upper end of the first valve seat section 41, the pressure-bonding section 411 includes a base section 4111 and an end section 4112, the end section 4112 is located at the upper side of the base section 4111, the end section 4112 is bent toward the central axis direction of the nut assembly 5 by caulking, and at least part of the end section 4112 is located above the connecting section 52. Before crimping, the crimp portion 411 is formed by machining or other processing in advance, and before crimping, the end portion 4112 is disposed substantially coaxially with the base portion 4111, and after crimping, the end portion 4112 is bent toward the central axis direction of the nut assembly 5. In the present embodiment, the connecting portion 52 includes the outer edge 525, the outer edge 525 is located at the outer periphery of the connecting portion 52, the end portion 4112 abuts against the outer edge 525 of the connecting portion 52, or the end portion 4112 abuts against the upper end face near the outer edge 525, or both, the connecting portion 52 can be restricted from being separated from the valve seat assembly 4 in the axial direction in the above-described manner. At this time, the outer edge of the connection portion 52 is clearance fit or abutment fit or interference fit with the base portion 4111, and the base portion 4111 may restrict the position of the connection portion 52 in the radial direction.

In other embodiments, the base portion 4111 may abut against the outer edge 525 of the connecting portion 52 to limit the axial position of the connecting portion 52. In yet another embodiment, the crimp portion 411 further includes a transition portion 4113, where the transition portion 4113 is located between the base portion 4111 and the end portion 4112, and where the transition portion 4113 abuts the outer edge 525 of the connection portion 52 to limit the axial position or the radial position of the connection portion 52. The radial position of the connecting portion 52 may be limited by the end portion 4112 or the transition portion of the end portion 4112 and the base portion 4111 abutting the outer edge of the connecting portion 52.

In other embodiments, the pressure-bonding section 411 may be formed by pressing, and the first valve seat section 41 is pressed by a tool to form the pressure-bonding section 411, and the connecting section 52 is fixed to the first valve seat section 41 by the pressure-bonding section 411.

Referring to fig. 2 to 12, in the present embodiment, the plastic member 51 of the nut assembly 5 includes a main body 511 and a nut 512, the outer diameter of the main body 511 is larger than that of the nut 512 as a whole, the main body 511 is disposed relatively close to the valve seat assembly 4, and the connecting portion 52 is connected to the main body 511 by injection molding. The nut portion 512 has a first through hole 5121, the nut portion 512 has an internal thread 82, the internal thread 82 is located on a wall forming the first through hole 5121, the lead screw portion 1221 penetrates the first through hole 5121, a portion of the lead screw portion 1221 penetrating the first through hole 5121 is connected with the rotor assembly 121 in a manner including welding, an outer peripheral wall of the lead screw portion 1221 has an external thread 81 engaged with the internal thread 82, and the lead screw portion 1221 is engaged with the nut portion 512. In the present embodiment, the nut portion 512 has a guide section 5112, the guide section 5112 is located below the internal thread 82, the lead screw portion 1221 has a portion that mates with the guide section 5112, and the guide section 5112 can provide guidance for the lead screw portion 1221. In other embodiments, the guide section may also be provided on the upper side of the internal thread 82.

Referring to fig. 2 to 10, in the present embodiment, the valve seat assembly 4 further includes a second valve seat portion 42, the second valve seat portion 42 is substantially hollow, at least a portion of the valve element assembly 122 is located in the inner cavity of the second valve seat portion 42, the second valve seat portion 42 has a valve opening portion 44, the valve opening portion 44 has a valve port 441, the valve element assembly 122 is capable of axially moving with respect to the valve port 441, the valve element portion 1222 of the valve element assembly 122 is engaged with the valve port 441, and the flow area of the valve port 441 is adjusted, thereby enabling flow rate adjustment of the refrigerant. The second valve seat portion 42 also has a side hole 45, the side hole 45 being located between the valve seat portion 44 and the first valve seat portion 41. The first valve seat portion 41 has a mounting hole 413, and at least a part of the second valve seat portion 42 is located in the mounting hole 413, and in this embodiment, the second valve seat portion 42 penetrates the first valve seat portion 41, and the first valve seat portion 41 is connected to the second valve seat portion 42 in a manner including a fixed connection and a limit connection.

In the present embodiment, the valve body 11 includes a first flow passage 111, a second flow passage 112, a first chamber 113, and a second chamber 114, the first flow passage 111 communicates with the first chamber 113, the second flow passage 112 communicates with the second chamber 114, and the first chamber 113 and the second chamber 114 can communicate with each other through the valve port 441. In the present embodiment, the chamber of the second valve seat portion 42 communicates with the first chamber 113 through the side hole 45.

Referring to fig. 2 to 10, in the present embodiment, the outer peripheral wall of the second valve seat portion 42 is in interference fit with the inner peripheral wall forming the mounting hole 413, the first valve seat portion 41 has the stepped portion 414, the stepped portion 414 is located in the mounting hole 413, the second valve seat portion 42 has the flange portion 421, the lower end surface of the flange portion 421 abuts against the bottom surface of the stepped portion 414, the bottommost position of the second valve seat portion 42 relative to the first valve seat portion 41 is limited, the first valve seat portion 41 includes the limiting structure 415, the limiting structure 415 abuts against the flange portion 421, at least part of the limiting structure 415 is located above the flange portion 421, the limiting structure 415 limits the first valve seat portion 41 to be separated in a direction away from the second valve seat portion 42, in the present embodiment, the limiting structure 415 is extruded by extrusion, the second valve seat portion 42 is extruded by using a tooling, the limiting structure 415 is formed, the limiting structure 415 extends toward the central axis direction of the electric valve, the second valve seat portion 42 is fixed on the first valve seat portion 41 by the limiting structure 415, and thus the connection of the first valve seat portion 41 and the welding step can be omitted. In other embodiments, the limiting structure 415 may be preformed, and after riveting, a portion of the limiting structure 415 extends toward the central axis of the electric valve. In yet another embodiment, the first valve seat portion 41 and the second valve seat portion 42 may be fixed by an interference fit only, or by an interference fit in combination with adhesive, or by welding, screw connection.

Referring to fig. 5 and 12, in the present embodiment, the main body 511 of the nut assembly 5 has a guide 5111 that engages with the second seat portion 42, the second seat portion 42 is substantially hollow, and the outer peripheral portion of the second seat portion 42 abuts against or is in clearance engagement with the main body 511, which is advantageous in improving the coaxiality of the second seat portion 42 and the valve element assembly 122.

Referring to fig. 2 to 8, in the present embodiment, the first valve seat portion 41 has a balance hole 14, and the balance hole 14 penetrates the first valve seat portion 41 in the axial direction of the electric valve. The number of balance holes 14 can be set as required, and in this embodiment, the number of balance holes 14 is 2. The balance holes 14 are arranged to be beneficial to balancing the pressure of the cavities corresponding to the two ends of the balance holes 14 respectively and reducing the valve opening force. In this embodiment, the first valve seat portion 41 is made of an aluminum material, which is advantageous in reducing the difficulty in processing the balance hole 14, compared to stainless steel.

Referring to fig. 2 to 9, in the present embodiment, the valve body 11 of the electric valve has a valve body cavity 115, at least a part of the valve seat assembly 4 is located in the valve body cavity 115, the first cavity 113 is a part of the valve body cavity 115, the first valve seat portion 41 has an externally threaded portion 83, an inner peripheral wall forming the valve body cavity 115 has an internally threaded portion 84 engaged with the externally threaded portion 83, and the valve seat assembly 4 is fixed to the valve body 11 by screw engagement.

Referring to fig. 2 to 9, in the present embodiment, the first valve seat portion 41 includes a first portion 416 and a second portion 417, the first portion 416 is located above the second portion 417, the first portion 416 is relatively close to the coil assembly 13, the first portion 416 includes the supporting portion 412 and the press-connection portion 411, the second portion 417 includes the external threaded portion 83, the external threaded portion 83 is disposed on an outer periphery of the second portion 417, the first portion 416 further includes a mating edge 4161, the mating edge 4161 is located on an outer periphery of the first portion 416, the mating edge 4161 is used as an application point for an external tightening tool, for example, a hexagonal structure or a quadrilateral structure, the valve seat assembly 4 and the valve body 11 are screwed together by an external tightening tool, for example, a hexagonal wrench or the like, and a lower end face of the first portion 416 abuts against the valve body 11 to limit a lowermost end position of the valve seat assembly 4 relative to the valve body.

Referring to fig. 2 to 6, the electric valve further includes a first seal 151, the first seal 151 is located between the connection portion 52 and the first valve seat portion 41, the first seal 151 is pressed between the connection portion 52 and the first valve seat portion 41, and the first seal 151 abuts against the connection portion 52 and the first valve seat portion 41, respectively. The first sealing member 151 is located between the supporting portion 412 and the connecting portion 52, and the supporting portion 412 and/or the connecting portion 52 has a first groove 1511, and the first sealing member 151 is received in the first groove 1511. The provision of the first seal 151 prevents the working medium from leaking outside the electric valve through the gap between the connection portion 52 and the support portion 412, and in this embodiment, the first groove 1511 is located in the valve body 11.

2-6, the electric valve is further provided with a second sealing element 152, the second sealing element 152 is located between the injection molding body 132 and the sleeve 6, the inner side and the outer side of the second sealing element 152 are respectively abutted against the injection molding body 132 and the sleeve 6, the second sealing element 152 is pressed between the injection molding body 132 and the sleeve 6, and the second sealing element 152 can prevent external water or harmful substances from entering a gap between the sleeve 6 and the coil assembly 13, so that corrosion is caused to the coil assembly 13 or other parts, and the service life and reliability of the electric valve are improved. The lower end of the second seal 152 abuts against the press-contact portion 411 or the connection portion 52, or a gasket is provided on the lower side of the second seal 152 for forming the second seal 152.

Referring to fig. 2 to 6, in the present embodiment, the electric valve further includes a third seal 153 and a fourth seal 154, the third seal 153 and the fourth seal 154 being located on both sides of the side hole 45, respectively, and in the present embodiment, the third seal 153 is located under or below the external thread portion 83, and the third seal 153 is pressed between the second portion 417 of the first valve seat portion 41 and the valve body 11, or limits leakage of the working medium from between the first valve seat portion 41 and the valve body 11 to the outside of the electric valve, and in other embodiments, the third seal 153 may be disposed between the first portion 416 and the valve body 11. The fourth seal 154 is pressed between the valve port 44 of the second valve seat portion 42 and the valve body 11, and restricts the flow of the working medium in the first and second chambers 113 and 114 between the valve port 44 and the valve body 11. In the present embodiment, the valve seat assembly 4 further has a groove for accommodating the third seal 153 and the fourth seal 154, however, in other embodiments, grooves for accommodating the third seal and the fourth seal may be provided on the valve body 11, or a part of the grooves may be provided on both the valve body 11 and the valve seat assembly 4 for accommodating the third seal and the fourth seal.

Referring to fig. 15-21, a second embodiment of an electrically operated valve is illustrated, in which the electrically operated valve 100 includes a nut assembly 5, a valve seat 43, and a sleeve 6, the nut assembly 5 includes a plastic part 51 and a connecting portion 52, the connecting portion 52 is fixed to the plastic part 51, the fixing manner includes injection fixing, interference or gluing, or interference bonding gluing, in which the connecting portion 52 is an injection molding insert to form the nut assembly 5 or a part of the nut assembly 5 through injection molding, and the plastic part 51 covers part of the connecting portion 52, as in the present embodiment, the plastic part 51 covers an inner part of the connecting portion 52. In this embodiment, the material of the connecting portion 52 is a metal material, the material of the sleeve 6 is a metal material, such as a stainless steel material, and the plastic member 51 may specifically be a special engineering plastic or a composite material with a certain strength, such as a mechanically reinforced polyetheretherketone material (PEEK) or a modified polyetheretherketone material (PEEK), or a mechanically reinforced polyphenylene sulfide (PPS) or a modified polyphenylene sulfide (PPS) material. In the present embodiment, the plastic part 51 is of an integral structure, and is integrally injection molded. In other ways, the plastic part 51 may be formed separately, and the plastic part 51 may be formed through a fixed connection or a limited connection. In this embodiment, the connecting portion 52 has a fixing reinforcing portion 523 at a portion connected to the plastic member 51, the fixing reinforcing portion 523 is located at an inner side portion of the connecting portion 52, and the fixing reinforcing portion 523 is at least partially covered by the plastic member 51, for example, an inner periphery of the connecting portion 52 has a non-circular structure, for example, an inner side shape of an inner side wall section may be square, hexagonal or an irregular circular shape with a straight edge of a portion or a quincuncial shape, so that the connecting strength between the connecting portion 52 and the plastic member 51 can be improved, and the connecting portion 52 can be prevented from rotating in a circumferential direction relative to the plastic member 51 by a circular structure relative to a side wall of the connecting portion 52. In other embodiments, the inner periphery of the connecting portion 52 may be provided with a groove structure, a protrusion structure, a knurling structure, or the like, or a through hole, a groove, a protrusion, or the like may be provided in the axial direction of the connecting portion 52, or a combination thereof.

Referring to fig. 15 to 21, in the present embodiment, the sleeve 6 includes an opening 61, a sleeve main body 62, and a sleeve top 63, the opening 61 and the sleeve main body 62 are integrally formed, the opening 61 is located below the sleeve main body 62, the sleeve top 63 is located above the sleeve main body 62, and the sleeve top 63 closes the tip of the sleeve 6. The opening 61 and the connecting portion 52 are fixed by welding, the connecting portion 52 includes an upper end surface portion 521, the opening 61 and the upper end surface portion 521 are fixed by welding, and at least a part of the upper end surface portion 521 is located outside the opening 61 in the radial direction of the electric valve. The upper end surface portion 521 includes a flat surface, for example, the entire upper end surface portion 521 is a flat surface, or a large portion is a flat surface, but at least a portion where the upper end surface portion 521 is connected to the sleeve 6 is a flat surface, and the flat surface in this application may allow a certain roughness. The upper end surface 521 is positioned on the upper surface of the connection portion 52, and the opening 61 is fixed by welding in contact with the upper end surface 521, so that at least a part of the upper end surface 521 is positioned outside the opening 61 in the radial direction of the motor-operated valve, or the outer edge of the opening 61 is spaced apart from at least a part of the outer edge of the upper end surface 521 by a predetermined distance. The sleeve 6 is fitted to the upper end surface 521 of the connecting portion 52 in the above manner, which is advantageous in simplifying the welding structure of the electric valve. The upper surface of the connecting portion 52 may be set to be a plane, and the entire upper end surface 521 may be a plane, so that the processing of the connecting portion 52 may be facilitated, for example, the connecting portion 52 may be formed by stamping, forging, warm upsetting, or the like, so that the machining step of the connecting portion 52 is reduced or omitted, the processing cost is reduced, and the step structure is relatively arranged to cooperate with the opening 61 of the sleeve 6 to be welded, so that the height of the connecting portion 52 may be reduced, and the overall height of the electric valve may be further reduced.

In the present embodiment, the upper end surface 521 is planar, and the distance between the outer edge of the opening 61 and the outer edge of the upper end surface 521 is 0.4mm or more in the radial direction of the motor-operated valve, and the opening 61 and the connecting portion 52 are fixed by laser welding, so that the welding penetration is improved, and the welding quality of the welded portion can be improved. In order to have a better welding effect, the distance between the outer edge of the opening portion 61 and the outer edge of the upper end surface portion 521 is greater than or equal to 0.5mm. In the present embodiment, the gap between the sleeve 6 and the connecting portion 52 is sealed by the welding surface at the same time.

In another embodiment, referring to fig. 15 to 21, the upper end surface 521 is planar, the outer edge of the upper end surface 521 includes a first edge 5211 and a second edge 5212, the outer diameter of the second edge 5212 is larger than the outer diameter of the first edge 5211, in this embodiment, the first edge 5211 is the minimum outer diameter of the outer edge of the upper end surface 521, the second edge 5212 is the maximum outer diameter of the outer edge of the upper end surface, the outer edge of the opening 61 does not exceed the first edge 5211, the distance between at least part of the outer edge of the opening 61 and the second edge 5212 is greater than or equal to 0.4mm, and the opening 61 is laser welded to the connecting portion 52. Since the outer edge of the connecting portion 52, i.e., the upper end surface portion 521, may not be regularly rounded, such as hexagonal or substantially hexagonal, or limited by the radial dimension of the connecting portion 52, it may be permissible for a portion of the outer edge of the opening portion 61 to be flush or nearly flush with the outer edge of the connecting portion 52, but not beyond the outer edge of the connecting portion 52, i.e., the outer edge of the opening portion 61 does not exceed the first edge 5211, but at least a portion of the outer edge of the opening portion 61 is spaced from the second edge 5212 by a distance of greater than or equal to 0.4mm. For example, in the embodiment described later, the connecting portion 52 has the engaging portion 524, the engaging portion 524 is located at the outer periphery of the connecting portion 52, and the engaging portion 524 is substantially hexagonal, that is, the outer edge of the connecting portion 52 is substantially hexagonal, which allows a portion of the outer edge of the opening 61 to be flush or nearly flush with the outer edge of the connecting portion 52 at the minor diameter, but not beyond the outer edge of the connecting portion 52. In one embodiment, the distance between the outer edge of the opening 61 and the first edge 5211 is greater than or equal to 0.4mm.

Referring to fig. 15 to 21, in the present embodiment, the sleeve 6 is integrally formed, and the sleeve 6 is integrally formed by, for example, punching, drawing, or the like, so that the sleeve can be easily formed. The sleeve body 62 is provided with an equal diameter, the opening 61 is provided with the sleeve body 62 with an equal diameter, the opening 61 is provided perpendicular to the upper end surface 521, the perpendicular arrangement includes substantially perpendicular, the equal diameter means the inner diameter is equal, the opening 61 includes a first lower end surface 611, and the first lower end surface 611 abuts against the upper end surface 521 and is laser welded. In the present embodiment, the outer diameters of the opening 61 and the sleeve main body 62 are also equal. This arrangement may simplify the machining of the sleeve 6.

Referring to fig. 15 to 21, in the present embodiment, the plastic part 51 has a sleeve positioning portion 513, the sleeve positioning portion 513 is formed on the main body portion 511 of the plastic part 51, the sleeve 6 is sleeved on the outer periphery of the sleeve positioning portion 513, the sleeve positioning portion 513 abuts against the inner peripheral wall of the sleeve 6, and the sleeve positioning portion 513 limits the radial position of the sleeve 6, so as to limit the position of the sleeve 6 relative to the connecting portion 52, and improve the positioning accuracy of the sleeve 6 and the connecting portion 52, and in the present embodiment, the sleeve 6 and the sleeve positioning portion 513 are in interference fit, which is beneficial to improving the positioning accuracy, and further beneficial to improving the coaxiality of the electric valve. Of course, in other embodiments, the sleeve 6 may be positioned by an external tool.

In this embodiment, the plastic part 51 of the nut assembly 5 has a first external thread 85, the first external thread 85 is located on the outer periphery of the plastic part 51, the first external thread 85 is located on the lower side of the connecting portion 52, the electric valve further includes a valve body 11, the valve body 11 has a valve cavity 115, the valve body 11 has a first internal thread 86 matching with the first external thread 85, the first internal thread 86 is located on a wall forming the valve cavity 115, the nut assembly 5 and the valve body 11 are fixed through threaded matching, in this embodiment, the lower end surface 522 of the connecting portion 52 abuts against the valve body 11, the position of the connecting portion 52 relative to the valve body 11 is limited, and in this way, the arrangement is favorable for reducing the risk of salt spray corrosion at the threaded matching position.

In contrast to the first embodiment of the electrically operated valve, in this embodiment, the electrically operated valve includes the valve seat portion 43, the valve port 441 is located on the valve seat portion 43, and the valve seat portion 43 is screwed or tightly fitted with the nut assembly 5, or screwed or tightly fitted with glue. The arrangement is beneficial to simplifying the structure of the electric valve and has fewer parts.

The connecting portion 52 has an engaging portion 524, and the engaging portion 524 is located on the outer peripheral wall of the connecting portion 52 or on the upper end surface of the connecting portion 52, and an external tool can engage with the engaging portion 524 to screw the connecting portion 52 and the valve body 11 to limit. The connecting portion 52 is a force receiving member for screw connection, and for example, an outer contour thereof, that is, an outer peripheral wall thereof may be adapted to the force of an assembling tool such as a wrench, and an outer shape of a cross section of the outer contour thereof may be square, hexagonal, quincuncial, or irregularly circular with parallel opposite sides for receiving force, etc. In this embodiment, the outer contour of the connecting portion 52 is hexagonal, and the outer edge of the opening 61 does not exceed the minimum outer diameter of the connecting portion 52. Of course, the connecting portion 52 may have other structures, for example, a groove is formed on an upper end surface of the connecting portion 52, and the external tool is provided with a protruding structure and a groove structure to be matched, so that the two structures are in threaded connection. The lower end surface of the connecting portion 52 abuts against the valve body 11, and the lowest end position of the connecting portion 52 relative to the valve body 11 is restricted. A seal is provided between the connecting portion 52 and the valve body 11 or between the plastic member 51 and the valve body 11.

Referring to fig. 22, and referring to fig. 16 and 17, in a modification of the present embodiment, the plastic part 51 may further include a relief portion 514, the relief portion 514 is disposed opposite to the opening 61, the relief portion 514 is not in contact with the opening 61, the relief portion 514 is recessed in a direction away from a portion where the opening 61 and the connecting portion 52 are engaged, and when the opening 61 and the connecting portion 52 are welded, the relief portion 514 is disposed to reduce heat transferred to the plastic part 51 during welding, thereby improving thermal influence of welding on the injection-molded part.

The electric valve may further include a sealing member 155, the sleeve positioning portion 513 having a second groove 1551, the sealing member 155 being located in the second groove 1551, the sealing member 155 being compressed between an inner circumferential wall of the sleeve 6 and an inner sidewall forming the second groove 1551. The provision of the seal member 155 can avoid adverse effects when the welded portion between the opening 61 of the sleeve 6 and the connecting portion 52 cannot be completely sealed.

The partial structure of this embodiment can be described with reference to the first embodiment above.

Referring to fig. 23 to 25, which illustrate a third embodiment of the electric valve, the sleeve 6 includes a sleeve body 62, and the opening 61 and the sleeve body 62 are integrally formed, the opening 61 is located below the sleeve body 62, the sleeve body 62 is equiradially provided, the minimum outer diameter of the opening 61 is equal to the outer diameter of the sleeve body 62, and the opening 61 is widened from top to bottom or from bottom to top in the axial direction of the electric valve. The opening 61 includes a first lower end surface 611, and the first lower end surface 611 abuts against the upper end surface 521 and is fixed by laser welding. By this arrangement, when the opening 61 and the connecting portion 52 are welded, the heat transferred to the plastic part 51 during welding can be reduced, and the heat influence of welding on the injection-molded part can be improved. Of course, the escape portion 514 may be further provided. Other structures of this embodiment may be described with reference to the above embodiments.

Referring to fig. 26, in combination with fig. 23 to 25, a fourth embodiment of an electrically operated valve is illustrated, and the sleeve 6 includes a sleeve body 62 as opposed to the second embodiment of the electrically operated valve, the opening 61 and the sleeve body 62 are integrally formed, the opening 61 is located below the sleeve body 62, the sleeve body 62 is disposed with a constant diameter, the outer diameter of the opening 61 is larger than the outer diameter of the sleeve body 62, the opening 61 is disposed in parallel with the sleeve body 62, the parallelism includes substantially parallel, and in the specific embodiment, the opening 61 includes a radial extension 612 and an axial extension 613, the radial extension 612 is located between the axial extension 613 and the sleeve body 62, the outer diameter of the axial extension 613 is larger than the outer diameter of the radial extension 612, and the axial extension 613 is disposed in parallel with the sleeve body 62. The opening 61 is fixed by laser welding while abutting against the connecting portion 52. In this way, the heat transferred to the plastic part 51 during welding can be reduced when the opening 61 of the sleeve 6 is welded, which is advantageous for improving the heat influence of welding on the injection molding part, and the relief 514 can be further provided. Other structures of this embodiment may be described with reference to the above embodiments.

Referring to fig. 27 to 33, a fifth embodiment of an electrically operated valve is shown, in which the electrically operated valve includes a valve member 12 and a valve body 11, and the valve member 12 is attachable to the valve body 11. The valve member 12 includes the nut member 5 and the sleeve 6, the nut member 5 includes the plastic member 51 and the connecting portion 52, the connecting portion 52 is fixed to the plastic member 51, the fixing manner includes injection fixing or interference or gluing, or interference bonding gluing, in this embodiment, the plastic member 51 covers part of the connecting portion 52, the sleeve 6 is fixedly connected to the connecting portion 52, the fixing manner includes welding, gluing, etc., the welding manner includes laser welding, brazing, etc., in this embodiment, the connecting portion 52 is provided with a step structure to be matched with the sleeve 6, and of course, the connecting manner of the connecting portion 52 and the sleeve 6 can refer to the second to fourth embodiments of the electric valve. The valve member 12 further has a connection structure 7, the connection structure 7 being formed at the connection portion 52 or being connected with the connection portion 52, and the valve member 12 being fixedly connected with the valve body 11 through the connection structure 7. The connecting structure 7 is formed and connected with the connecting part 52 or the connecting part 52, and the valve component 12 is fixedly connected with the valve body 11 through the connecting structure 7, so that the connection of all components of the electric valve is facilitated to be simplified, the connecting structure of the valve component is facilitated to be simplified, and the processing cost is further reduced. In the present embodiment, the valve member 12 is fixedly connected to the valve body 11 via the connecting portion 52, which is advantageous in terms of the structure of the electric valve, the number of parts of the electric valve, and the simplification of the installation of the electric valve. The partial structure of this embodiment may be referred to or referred to in the above embodiments, and for example, the welding of the sleeve 6 to the connecting portion 52 may be referred to in the second to fourth embodiments of the electric valve. The universally applicable structures of the embodiments may also be used in combination.

Referring to fig. 27 to 33, in the present embodiment, the plastic member 51 covers the inner portion of the connecting portion 52, the material of the connecting portion 52 is a metal material, such as a stainless steel material, the plastic member 51 is formed by injection molding the connecting portion 52 as an injection molding insert, or the connecting portion 52 is formed into the nut assembly 5 by injection molding the injection molding insert, or forms a part of the nut assembly 5, the plastic member 51 is formed by injection molding, the connecting portion 52 has a fixing reinforcement portion 523, the fixing reinforcement portion 23 is located at the inner portion of the connecting portion 52, and the fixing reinforcement portion 523 is at least partially covered by the plastic member 51. The plastic part 51 may be a special engineering plastic or a composite material having a certain strength, such as a mechanically reinforced polyetheretherketone material (PEEK) or a modified polyetheretherketone material (PEEK), or a mechanically reinforced polyphenylene sulfide (PPS) or a modified polyphenylene sulfide (PPS) material. In the present embodiment, the plastic part 51 is of an integral structure, and is integrally injection molded. In other ways, the plastic part 51 may be formed separately, and the plastic part 51 may be formed through a fixed connection or a limited connection. In this embodiment, the connecting portion 52 has a fixing reinforcing portion 523 at a portion connected to the plastic member 51, the fixing reinforcing portion 523 is located at an inner side portion of the connecting portion 52, the fixing reinforcing portion 523 is at least partially covered by the plastic member 51, for example, an inner periphery of the connecting portion 52 is in a non-circular structure as a fixing reinforcing structure, for example, an inner side shape of a section of an inner side wall may be square, hexagonal or an irregular circular shape with a straight edge of a portion or a quincuncial shape, etc., so that the connection strength between the connecting portion 52 and the plastic member 51 can be improved, and the circular structure of the side wall opposite to the connecting portion 52 can prevent the connecting portion 52 from rotating in a circumferential direction relative to the plastic member 51, thereby improving the connection strength. In other embodiments, the inner periphery of the connecting portion 52 may be provided with a groove structure, a protrusion structure, a knurling structure, or the like capable of achieving a similar function as a fixing reinforcing structure, or a through hole, a groove, a protrusion, a knurling structure, or the like may be provided in the axial direction as a fixing reinforcing structure, or in combination with the fixing reinforcing structure provided in the foregoing circumferential direction.

In the present embodiment, the connection structure 7 includes the first male screw portion 71, and the first male screw portion 71 is located on the outer peripheral wall of the connection portion 52. The valve body 11 has a valve body cavity 115, at least part of the connecting portion 52 is located in the valve body cavity 115, the wall forming the valve body cavity 115 has a first female screw portion 72 corresponding to the first male screw portion 71, and the connecting portion 52 is fixed to the valve body 11 by screw-fitting. This arrangement is advantageous in simplifying the installation of the valve member 12 and the valve body 11, and also in simplifying the structure of the valve member 12, and in reducing the number of parts. The connecting portion 52 also has a mating portion 524; the mating portion 524 is a groove formed in the connecting portion 52, an opening of the groove is located on an upper wall of the connecting portion 52, and an external tool can be mated with the mating portion 524 to screw the connecting portion 52 to the valve body 11. The external tool is, for example, a tool with a protruding part, the protruding part of the tool extends into a groove on the upper side of the connecting part 52, and the tool drives the connecting part 52 to rotate to be in threaded fit with the valve body 11, so that the valve component 12 and the valve body 11 are screwed tightly and fixed. By this arrangement, the valve member 12 and the valve body 11 can be assembled easily, the mounting structure can be simplified, and the connecting portion 52 can be formed easily. The lower end of the connecting portion 52 abuts against the valve body 11 to limit the position of the connecting portion 52 at the lowest end relative to the valve body 11, and in this embodiment, the valve body 11 is further provided with a step structure, and the connecting portion 52 is located in a groove formed by the step structure and abuts against the bottom wall of the step structure.

In another embodiment, the mating portion 524 is a mating edge 4161 formed on an upper side of the first externally threaded portion 71. For example, the outer peripheral wall of the connecting portion 52 has a first external screw portion 71 on the lower side and a mating edge 4161 on the upper side, the mating edge 4161 is a force receiving structure for screw connection, the mating edge 4161 can be applied to the force of an assembly tool such as a wrench, and the outer shape of the cross section of the outer contour can be square, hexagonal, quincuncial, irregular circular with parallel opposite sides for force receiving, or the like. In this embodiment, the mating edge 4161 is hexagonal and serves as a point of force for an assembly tool such as a wrench. By this arrangement, the valve member 12 and the valve body 11 can be assembled easily, and the mounting structure can be simplified.

In the present embodiment, the valve member 12 includes the valve seat portion 43, the valve seat portion 43 has the valve port 441, and the valve seat portion 43 is screw-fitted or tightly-fitted, or screw-fitted and glued, or tightly-fitted and glued with the nut assembly 5. Reference may be made in particular to the second to fourth embodiments of the electrovalve. Of course, in other embodiments, the valve body 11 may be welded to the connecting portion 52, and the general-purpose structure of each embodiment may be used in combination.

Referring to fig. 34 to 38, a sixth embodiment of an electrically operated valve is shown, in which the connection structure 7 is a connection member 74, the connection member 74 is substantially columnar, the connection portion 52 has a communication hole 75, the communication hole 75 penetrates the connection portion 52 in the axial direction of the electrically operated valve, the connection member 74 has an externally threaded engagement portion 741, the upper end of the valve body 11 has a connection hole 76, the connection hole 76 opens toward the connection portion 52, the wall forming the connection hole 76 has an internally threaded engagement portion 742 engaged with the externally threaded engagement portion 741, the communication hole 75 is coaxially opposed to the communication hole 75 during assembly, the connection member 74 penetrates the communication hole 75 and is screwed into the connection hole 76 by screw engagement, thereby fixing the connection portion 52 to the valve body 11, at least a part of the connection member 74 is located in the communication hole 75, and at least a part of the connection member 74 is located in the connection hole 76. The upper end of the connecting piece 74 is provided with a flange, the outer diameter of the flange is larger than the outer diameter of the connecting hole 76, and the flange cannot pass through the connecting hole 76; the lower end of the connecting portion 52 abuts against the valve body 11, and the position of the connecting portion 52 at the lowermost end with respect to the valve body 11 is restricted. Other structures of this embodiment may be described with reference to the above embodiments. The connecting pieces 74 include screws, bolts or the like, the number of the connecting pieces 74 corresponds to the number of the communication holes 75, the number of the connecting pieces 74 and the number of the communication holes 75 are more than 2, the communication holes 75 are uniformly distributed on the periphery of the connecting portion 52, and in the embodiment, the number of the connecting pieces 74, the number of the communication holes 75 and the number of the connecting holes 76 are 4, so that the reliability of connection is improved. The connecting piece 74 is used as the connecting structure 7, and the connecting part 52 is fixed on the valve body 11, so that the assembly of the valve component 12 and the valve body 11 can be facilitated, and the mounting structure can be simplified. In another embodiment, the connector 74 does not have an externally threaded mating portion 741, and a portion of the connector 74 is positioned in the connecting hole 76 of the valve body 11 and is interference fit with the connecting hole 76 to secure the valve member 12 to the valve body 11.

In still another embodiment of the electric valve, in contrast to the fifth embodiment of the electric valve, in this embodiment, the connection structure 7 is a connection member 74, the connection member 74 is ring-shaped, the connection member 74 has an externally threaded engagement portion 741, a wall forming the valve cavity 115 has an internally threaded engagement portion 742 that engages with the externally threaded engagement portion 741, the valve body 11 has a first stepped portion 77, a lower end portion of the connection portion 52 abuts against the first stepped portion 77, the connection member 74 is fixed to the valve body 11 by threaded engagement, a lower end portion of the connection member 74 abuts against an upper end portion of the connection portion 52, and the connection portion 52 is pressed and restrained between the connection portion 52 and the valve body 11, thereby restraining the valve seat portion 43 to the valve body 11. In this way, the assembly of the valve component 12 and the valve body 11 can be facilitated, the installation structure is simplified, and the number of parts is reduced.

Referring to fig. 39-45, a seventh embodiment of an electrically operated valve is illustrated, in this embodiment, the electrically operated valve includes a nut assembly 5, a valve seat assembly 4, a valve core assembly 122, and a sleeve 6, the nut assembly 5 includes a plastic part 51 and a connecting portion 52, the connecting portion 52 is fixed to the plastic part 51, the fixing manner includes injection fixing, interference or gluing, or interference bonding gluing, in this embodiment, the connecting portion 52 is an injection molding insert to form a part of the nut assembly 5 or the nut assembly 5, and the plastic part 51 covers part of the connecting portion 52, as in this embodiment, the plastic part 51 covers an inner part of the connecting portion 52. The plastic member 51 covers part of the connection portion 52, and as in the present embodiment, the plastic member 51 covers an inner side portion of the connection portion 52. In this embodiment, the material of the connecting portion 52 is a metal material, the material of the valve seat assembly 4 is at least a metal material, the material of the sleeve 6 is a metal material, such as a stainless steel material, the sleeve 6 is fixedly connected with the connecting portion 52, the fixed connection manner includes welding, and the plastic member 51 may specifically be a special engineering plastic or a composite material with a certain strength, such as a mechanically reinforced polyetheretherketone material (PEEK) or a modified polyetheretherketone material (PEEK), or a mechanically reinforced polyphenylene sulfide (PPS) or a modified polyphenylene sulfide (PPS) material. In the present embodiment, the plastic part 51 is of an integral structure, and is integrally injection molded. In other ways, the plastic part 51 may be formed separately, and the plastic part 51 may be formed through a fixed connection or a limited connection. In this embodiment, the connecting portion 52 has a fixing reinforcing portion 523 at a portion connected to the plastic member 51, the fixing reinforcing portion 523 is located at an inner side portion of the connecting portion 52, and the fixing reinforcing portion 523 is at least partially covered by the plastic member 51, for example, an inner periphery of the connecting portion 52 has a non-circular structure, for example, an inner side shape of an inner side wall section may be square, hexagonal or an irregular circular shape with a straight edge of a portion or a quincuncial shape, so that the connecting strength between the connecting portion 52 and the plastic member 51 can be improved, and the connecting portion 52 can be prevented from rotating in a circumferential direction relative to the plastic member 51 by a circular structure relative to a side wall of the connecting portion 52. In other embodiments, the inner periphery of the connecting portion 52 may be provided with a groove structure, a protrusion structure, a knurling structure or the like capable of achieving a similar function, a through hole, a groove, a protrusion or the like may be provided in the axial direction, or a combination of the foregoing structures may be provided.

Referring to fig. 39 to 45, in this embodiment, the valve seat assembly 4 includes a valve port portion 44, the valve port portion 44 has a valve port 441, the electric valve further includes a valve core assembly 122, the valve core assembly 122 can cooperate with the valve port 441 to adjust the opening of the valve port 441, the connecting portion 52 includes a lower end surface portion 522, the lower end surface portion 522 is located on a lower wall of the connecting portion 52, and the lower end surface portion 522 includes a plane, for example, the whole lower end surface portion 522 is a plane, or a majority of the lower end surface portion 522 is a plane, but at least a portion connected to the valve seat assembly 4 is a plane, which in this application may allow for a certain roughness. The valve seat assembly 4 includes a first end portion 47, the material of the first end portion 47 is a metal material, and the first end portion 47 abuts against the lower end surface portion 522 and is connected by welding. The sleeve 6 is fixedly connected with the connecting part 52, the first end part 47 of the valve seat assembly 4 is fixedly welded with the lower end surface part 522, and the matching part of the valve seat assembly 4 and the connecting part 52 does not need to process an additional matching structure, so that the processing cost of the valve seat assembly is reduced. The arrangement is beneficial to simplifying the structure of each part and reducing the processing cost. In the present embodiment, the lower end surface 522 is located on the lower wall of the connecting portion 52, and at least a part of the lower end surface 522 is located outside the first end 47 in the radial direction of the motor-operated valve, and the lower end surface 522 is fixed to the connecting portion 52 by laser welding. The lower end of the connecting portion 52 is provided in a plane, which is advantageous in simplifying the processing of the connecting portion 52 and reducing the processing cost. Referring to the second embodiment of the electric valve, the present embodiment may be combined with the second embodiment, and the entire upper end surface 521 of the connection portion 52 may be planar, and the entire lower end surface 522 may be planar, so that the connection portion 52 may be conveniently machined, for example, the connection portion 52 may be formed by stamping, forging, warm upsetting, or the like, so that the machining step of the connection portion 52 may be reduced or omitted, and the height of the connection portion 52 may be reduced, thereby reducing the overall height of the electric valve.

Referring to fig. 39 to 45, in the present embodiment, the valve seat assembly 4 includes the first valve seat portion 41, the first valve seat portion 41 includes the first main body 48 and the first end portion 47, the first main body 48 and the first end portion 47 are integrally formed, the first end portion 47 is located above the first main body 48, the first end portion 47 abuts against the lower end surface portion 522 and is fixed by laser welding, and a distance between an outer edge of the first end portion 47 and an outer edge of the lower end surface portion 522 in a radial direction of the motor-operated valve is greater than or equal to 0.4mm, and the first end portion 47 is laser welded to the connecting portion 52. In the present embodiment, the first end 47 is disposed at equal diameters of the inner and outer diameters of the first body 48, and the first end 47 is disposed perpendicularly to the lower end surface 522, and the perpendicular arrangement includes substantially perpendicular arrangement and is connected by laser welding. In this embodiment, the sealing surface is formed by a welding surface. Some of the structures of this embodiment may be described with reference to or in reference to the above embodiments, and the general structures of the embodiments may be used in combination.

Referring to fig. 39 to 45, in the present embodiment, the lower end surface 522 is planar, and the distance between the outer edge of the first end 47 and the outer edge of the lower end surface 522 is greater than or equal to 0.4mm in the radial direction of the electric valve, and the first end 47 and the connecting portion 52 are laser welded, so that the welding penetration depth is better, and the welding quality of the welding portion is improved. In order to have a better welding effect, the outer edge of the first end portion 47 is 0.5mm or more from the outer edge of the lower end face portion 522. In the present embodiment, the gap between the sleeve 6 and the connecting portion 52 is sealed by the welding surface at the same time.

Referring to fig. 39-45, in another embodiment, the lower end surface 522 is planar, the outer edge of the lower end surface 522 includes a first edge 5211 and a second edge 5212, the outer diameter of the second edge 5212 is larger than the outer diameter of the first edge 5211, in this embodiment, the first edge 5211 is the minimum outer diameter of the outer edge of the lower end surface 522, the second edge 5212 is the maximum outer diameter of the outer edge of the lower end surface 522, the outer edge of the first end 47 does not exceed the first edge 5211, the distance between at least part of the outer edge of the first end 47 and the second edge 5212 is greater than or equal to 0.4mm, and the first end 47 is laser welded to the connecting portion 52. Since the outer edge of the connecting portion 52, i.e., the lower end surface portion 522, may not be regularly rounded, such as hexagonal or substantially hexagonal, or limited by the radial dimension of the connecting portion 52, it may be permissible for a portion of the outer edge of the first end portion 47 to be flush or nearly flush with the outer edge of the connecting portion 52, but not beyond the outer edge of the connecting portion 52, i.e., the outer edge of the first end portion 47 does not exceed the first edge 5211, but at least a portion of the outer edge of the first end portion 47 is spaced from the second edge 5212 by a distance of greater than or equal to 0.4mm. For example, in the above embodiment, the connecting portion 52 has the mating portion 524, where the mating portion 524 is located at the outer periphery of the connecting portion 52, and the mating portion 524 is substantially hexagonal, that is, the outer edge of the connecting portion 52 is substantially hexagonal, which may allow a portion of the outer edge of the first end portion 47 to be flush or nearly flush with the outer edge of the connecting portion 52 at the minor diameter, but not beyond the outer edge of the connecting portion 52. In the present embodiment, the gap between the sleeve 6 and the connecting portion 52 is sealed by the welding surface at the same time. In one more effective embodiment, the outer edge of the first end 47 is spaced from the first edge 5211 by a distance of greater than or equal to 0.4mm.

Referring to fig. 39 to 45, in the present embodiment, the plastic member 51 of the nut assembly 5 includes a main body portion 511 and a nut portion 512, the main body portion 511 includes a valve seat positioning portion 5113, the valve seat assembly 4 includes a housing portion 46, the housing portion 46 has a housing chamber 461, the valve seat positioning portion 5113 is located in the housing chamber 461, the valve seat positioning portion 5113 abuts against an inner peripheral wall of the first valve seat portion 41, and the valve seat positioning portion 5113 restricts a radial position of the first valve seat portion 41, thereby restricting a radial position of the positioning portion with respect to the connecting portion 52. In this embodiment, the valve seat positioning portion 5113 has a plurality of concave portions 5114, and the concave portions 5114 can be beneficial to reducing the weight of the plastic member 51. Of course, referring to the second embodiment of the electrically operated valve, the plastic part 51 may be provided with the relief 514, or the first end 47 may be relatively outwardly enlarged, which may facilitate reducing heat transferred to the plastic part 51 during welding and improving the thermal effect of welding on the injection molded part. In this embodiment, the first valve seat portion 41 is in interference fit with the valve seat positioning portion 5113, which is advantageous for improving positioning accuracy and further for improving coaxiality of the electric valve. Of course, in other embodiments, the valve seat assembly 4 may also be positioned using an external tool.

Referring to fig. 39 to 45, in the present embodiment, the valve seat assembly 4 further includes a second valve seat portion 42, the second valve seat portion 42 is away from the connecting portion 52 with respect to the first valve seat portion 41 in the axial direction of the electric valve, the valve opening portion 44 is located in the second valve seat portion 42, and the first valve seat portion 41 and the second valve seat portion 42 are integrally formed; the valve seat assembly 4 is integrally formed by a warm upsetting process, or a main body part of the valve seat assembly 4 is formed by the warm upsetting process of the valve seat assembly 4, and a side hole 45, a groove or a valve port 441 and the like are machined in the combination machine. The valve seat assembly 4 is formed conveniently, machining consumable materials can be reduced relatively completely through machining, and cost is reduced. In a variation of this embodiment, the valve seat assembly 4 is formed by a metal stretching process, or the valve seat assembly 4 forms a main body portion of the valve seat assembly 4 by a metal stretching process, and then the side hole 45, the groove or the valve port 441 are machined in combination, so that the arrangement is also beneficial to the formation of the valve seat assembly, and compared with machining, the machining consumable can be reduced, and the cost is reduced. The metal stretching process comprises stretching, stamping and the like.

Referring to fig. 39 to 45, in this embodiment, the electric valve further includes a valve body 11, the valve body 11 has a valve body cavity 115, at least part of the valve seat assembly 4 is located in the valve body cavity 115, the first valve seat portion 41 has a first external thread 85, a wall forming the valve body cavity 115 has a first internal thread 86 engaged with the first external thread 85, and the valve seat assembly 4 is fixed to the valve body 11 by screw engagement. Of course, the connection between the valve seat assembly 4 or the nut assembly 5 and the valve body 11 may be the same as that of the above-described embodiment, and for example, the first external screw thread 85 may be provided on the outer periphery of the connection portion 52, and the first internal screw thread 86 may be provided on the valve body 11, and the two may be screwed and fixed.

Referring to fig. 39 to 45, in the present embodiment, the electric valve has a balance passage 15, and the balance passage 15 includes a groove formed by the valve seat positioning portion 5113 or the first valve seat portion 41, a through hole penetrating the connecting portion 52 in the axial direction, and a through hole penetrating the plastic member 51 in the axial direction. The balance channel 15 communicates between the cavity formed by the valve seat assembly 4 and the cavity formed by the sleeve 6. The balance hole 14 may be formed by injection molding or by post-processing.

In the present embodiment, the valve seat assembly 4 further has a side hole 45, the side hole 45 is located above the valve opening 44, the electric valve further includes a first sealing member located between the connecting portion 52 and the valve body 11 or between the first valve seat portion 41 and the valve body 11, and a second sealing member located between the second valve seat portion 42 and the valve body 11; or the connection portion 52 is connected to the valve body 11. The first sealing member and the second sealing member may function as described in the foregoing embodiments. When the first sealing component and the second sealing component are both positioned on the valve seat assembly, the valve component can be conveniently connected with the valve body as a whole.

Referring to fig. 46, in another modification of the 7 th embodiment of the electric valve according to fig. 40, the first valve seat portion 41 and the second valve seat portion 42 are formed separately, and are fixedly connected or limitedly connected. The first valve seat part 41 is integrally formed by a warm heading process, or the first valve seat part 41 is formed by a metal stretching process, or the first valve seat part 41 is formed by a warm heading process in combination with a machining process, or the first valve seat part 41 is formed by a metal stretching process in combination with a machining process; the second valve seat portion 42 and the first valve seat portion 41 are fixed by welding or gluing or tight fitting, or a tight fitting combined gluing. The arrangement is beneficial to the formation of the valve seat assembly 4, and compared with machining, the machining consumable can be reduced, and the cost is reduced. In the present embodiment, the second valve seat portion 42 has a step 422, the step 422 includes a step bottom surface 4221 and a step side surface 4222, the bottom end of the first valve seat portion 41 is in contact with the step bottom surface 4221, the inner peripheral wall of the first valve seat portion 41 is in contact with the step side surface 4222, the radial position of the first valve seat portion 41 relative to the second valve seat portion 42 is restricted, the material of the second valve seat portion 42 is a metal material or the main body portion of the second valve seat portion 42 is a resin material, and the valve port is made of a metal material.

In this embodiment, the electric valve further includes the second sealing member 152, the lower end portion of the second sealing member 152 abuts against the connecting portion 52, the second sealing member 152 is pressed between the injection molding body 132 and the sleeve 6, and the provision of the second sealing member 152 can prevent external moisture or harmful substances from entering into the gap between the sleeve 6 and the coil assembly 13, and corrosion is caused to the coil assembly 13 or other parts, thereby improving the life and reliability of the electric valve.

Other structures of this embodiment may be described with reference to the above embodiments. The embodiments are within the scope of the present application by deriving structures that can be used in combination.

It should be noted that: the above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention are intended to be included in the scope of the claims of the present invention.

Claims

1. The electric valve is characterized by comprising a nut assembly (5), a valve seat assembly (4) and a sleeve (6), wherein the nut assembly (5) comprises a plastic piece (51) and a connecting part (52), the connecting part (52) is fixed with the plastic piece (51), and the sleeve (6) is fixedly connected with the connecting part (52);

The valve seat assembly (4) comprises a first valve seat portion (41), the first valve seat portion (41) comprises a supporting portion (412) and a pressure welding portion (411), the lower end portion of the connecting portion (52) is abutted to the supporting portion (412), at least part of the pressure welding portion (411) is abutted to the connecting portion (52), and at least part of the pressure welding portion (411) is located above the connecting portion (52).

2. The electric valve according to claim 1, characterized in that the material of the first valve seat portion (41) is an aluminum material, the material of the connecting portion (52) is a stainless steel material, the material of the sleeve (6) is a stainless steel material, and the sleeve (6) and the connecting portion (52) are welded and fixed.

3. The electric valve according to claim 1 or 2, characterized in that the crimp portion (411) comprises a base portion (4111) and an end portion (4112), the end portion (4112) being bent by riveting towards the central axis of the nut assembly (5), at least part of the end portion (4112) being located above the connecting portion (52); the connecting portion (52) comprises an outer edge (525), the outer edge (525) is located on the outer periphery of the connecting portion (52), and the end portion (4112) is abutted with the outer edge (525) of the connecting portion (52) or the end portion (4112) is abutted with an upper end face close to the outer edge (525).

4. A valve according to claim 3, wherein the base portion (4111) is a clearance fit or an abutment fit or an interference fit with the outer edge (525) of the connecting portion (52).

5. The electric valve according to claim 1 or 2, characterized in that the crimp portion (411) comprises a base portion (4111) and an end portion (4112), the end portion (4112) being bent by riveting towards the central axis of the nut assembly (5), at least part of the end portion (4112) being located above the connecting portion (52); the connecting portion (52) comprises an outer edge (525), the outer edge (525) is located at the outer periphery of the connecting portion (52), the base portion (4111) is abutted to the outer edge (525) of the connecting portion (52), or the crimping portion (411) further comprises a transition portion (4113), the transition portion (4113) is located between the base portion (4111) and the end portion (4112), and the transition portion (4113) is abutted to the outer edge (525) of the connecting portion (52).

6. The electric valve according to claim 3 or 5, characterized in that it further comprises a first seal (151), said first seal (151) being located between said connection portion (52) and said first valve seat portion (41), said first seal (151) being in abutment with said connection portion (52) and said first valve seat portion (41), respectively.

7. The electrically operated valve according to claim 6, characterized in that the first sealing member (151) is located between the supporting portion (412) and the connecting portion (52), the supporting portion (412) and/or the connecting portion (52) having a first groove (1511), the first sealing member (151) being accommodated in the first groove (1511).

8. The electrically operated valve of claim 6, wherein the valve seat assembly (4) further comprises a second valve seat portion (42), the second valve seat portion (42) having a valve port (411), the electrically operated valve further having a valve core assembly (122), the valve core assembly (122) being capable of cooperating with the valve port (411) to adjust a flow area of the valve port (411); the first valve seat part (41) is provided with a mounting hole (413), at least part of the second valve seat part (42) is positioned in the mounting hole (413), and the first valve seat part (41) is connected with the second valve seat part (42).

9. The electric valve according to claim 8, characterized in that the outer peripheral wall of the second valve seat portion (42) is interference-fitted with the inner peripheral wall forming the mounting hole (413); the first valve seat part (41) is provided with a step part (414), the step part (414) is positioned in the mounting hole (413), the second valve seat part (42) is provided with a flange part (421), the lower end surface of the flange part (421) is abutted with the bottom surface of the step part (414), the first valve seat part (41) comprises a limit structure (415), the limit structure (415) is abutted with the flange part (421), and at least part of the limit structure (415) is positioned above the flange part (421); or the second valve seat part (42) is in interference fit limit with the first valve seat part (41); or the second valve seat part (42) is in interference fit with the first valve seat part (41) and fixedly connected by bonding glue.

10. The electric valve according to claim 8, characterized in that the first valve seat portion (41) has a balance hole (14), the balance hole (14) penetrating the first valve seat portion (41) in an axial direction of the electric valve.

11. The electric valve according to any one of claims 2 to 10, characterized in that the electric valve further comprises a valve body (11), the valve body (11) having a valve body cavity (115), at least part of the valve seat assembly (4) being located in the valve body cavity (115), the first valve seat portion (41) having an externally threaded portion (83), an inner peripheral wall forming the valve body cavity (115) having an internally threaded portion (84) that is threadedly engaged with the externally threaded portion (83), the valve seat assembly (4) being threadedly engaged with the valve body (11).

12. The electrically operated valve as claimed in claim 11, wherein said first valve seat portion (41) includes a first portion (416) and a second portion (417), said first portion (416) being located above said second portion (417), said first portion (416) including said support portion (412), a crimping portion (411), said male threaded portion (83) being located at said second portion (417), said first portion (416) further having a mating edge (4161), said mating edge (4161) being located at an outer periphery of said first portion (416), said mating edge (4161) serving as a point of application for an external tightening tool, said valve seat assembly (4) being screwed down with said valve body (11) by an external tightening tool mating with said mating edge (4161), a lower end face of said first portion (416) being in abutment with said valve body (11).

13. The electrically operated valve according to claim 12, further comprising a coil assembly (13) and a rotor assembly (121), wherein the coil assembly (13) comprises a stator assembly (131) and an injection molding body (132), a valve core assembly (122) is connected with the rotor assembly (121), the stator assembly (131) can drive the rotor assembly (121) to rotate, the rotor assembly (121) can drive the valve core assembly (122) to act, the electrically operated valve further comprises a second sealing element (152), the second sealing element (152) is located between the injection molding body (132) and the sleeve (6), and the second sealing element (152) is in abutting connection with the connecting portion (52) or in abutting connection with the crimping portion (411).

14. The electrically operated valve according to claim 12 or 13, characterized in that the second valve seat portion (42) further has a valve opening portion (44), the valve opening (411) is located at the valve opening portion (44), the second valve seat portion (42) further has a side hole (45), the side hole (45) is located between the valve opening portion (44) and the first valve seat portion (41), the electrically operated valve further comprises a third seal member (153) and a fourth seal member (154), the third seal member (153) and the fourth seal member (154) are located on both sides of the side hole (45), respectively, the third seal member (153) is pressed between the first valve seat portion (41) and the valve body (11), and the fourth seal member (154) is pressed between the second valve seat portion (42) and the valve body (11).