CN113639048A - Electronic expansion valve and manufacturing method thereof - Google Patents
Electronic expansion valve and manufacturing method thereof Download PDFInfo
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- CN113639048A CN113639048A CN202010334313.6A CN202010334313A CN113639048A CN 113639048 A CN113639048 A CN 113639048A CN 202010334313 A CN202010334313 A CN 202010334313A CN 113639048 A CN113639048 A CN 113639048A
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- limiting
- connecting piece
- expansion valve
- piece
- electronic expansion
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000001746 injection moulding Methods 0.000 claims abstract description 15
- 238000003466 welding Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 2
- 238000004663 powder metallurgy Methods 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/02—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with screw-spindle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides an electronic expansion valve and a manufacturing method thereof, wherein the electronic expansion valve comprises a magnetic rotor, a connecting piece, a limiting piece, a screw and a guide shaft, wherein the connecting piece is fixedly arranged in the magnetic rotor and is provided with a first matching hole, and the connecting piece is of an injection molding structure; the limiting piece is in limiting fit with the connecting piece and is provided with a second matching hole, and the second matching hole is arranged corresponding to the first matching hole; the screw rod penetrates through the first matching hole and is fixedly connected with the inner wall of the second matching hole; the guide shaft is fixedly arranged and extends in the magnetic rotor along the axial direction of the magnetic rotor. By adopting the scheme, the connecting piece is of an injection molding structure and is in limit fit with the limiting piece, compared with the connecting piece of the existing powder metallurgy structure, the manufacturing cost of a single part can be reduced, and the connecting piece and the limiting piece do not need to be welded, so that the assembly cost can be reduced.
Description
Technical Field
The invention relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve and a manufacturing method thereof.
Background
The connecting piece matched with the magnetic rotor and the screw rod in the existing electronic expansion valve is usually of a powder metallurgy structure, and the process cost is high. Moreover, due to the characteristics of the powder metallurgy material, the welding position of the connecting piece is blackened when the connecting piece is welded with other parts, the welding strength is insufficient, and the welding quality is difficult to identify. Therefore, it is necessary to optimize the electronic expansion valve to reduce the cost and improve the quality.
Disclosure of Invention
The invention provides an electronic expansion valve and a manufacturing method thereof, which aim to reduce the manufacturing cost of the electronic expansion valve.
In order to achieve the above object, according to one aspect of the present invention, there is provided an electronic expansion valve comprising: a magnetic rotor; the connecting piece is fixedly arranged in the magnetic rotor, at least one part of the connecting piece is provided with a first matching hole, and the connecting piece is of an injection molding structure; the limiting piece is in limiting fit with the connecting piece and is provided with a second matching hole, and the second matching hole is arranged corresponding to the first matching hole; the screw rod penetrates through the first matching hole and is fixedly connected with the inner wall of the second matching hole; and the guide shaft is fixedly arranged and extends in the magnetic rotor along the axial direction of the magnetic rotor.
Further, the guide shaft is fixedly connected with the connecting piece.
Further, the guide shaft is of an injection molding structure.
Further, the connecting piece and the guide shaft are of an integrated structure.
Further, the connecting piece includes the plate body and sets up boss on the plate body, first mating holes is located on the plate body, the boss with spacing cooperation of locating part.
Further, the boss is provided with a limiting groove, at least one part of the limiting part is arranged in the limiting groove, and the outer peripheral surface of the limiting part is in limiting fit with the inner peripheral surface of the limiting groove.
Further, the outer circumferential surface of the limiting member is composed of a plurality of planes and/or arc surfaces, and the shape of the inner circumferential surface of the limiting groove is matched with the shape of the outer circumferential surface of the limiting member.
Further, the screw rod penetrates through the second matching hole, and the outer wall of the screw rod is welded with the inner wall of the second matching hole.
Furthermore, the outer peripheral surface of the connecting piece consists of a plurality of planes and/or cambered surfaces, an annular groove is formed in the inner wall of the magnetic rotor, the periphery of the connecting piece is arranged in the annular groove, and the annular bottom wall of the annular groove is matched with the outer peripheral surface of the connecting piece in shape.
According to another aspect of the present invention, there is provided a method of manufacturing an electronic expansion valve, the method comprising: injection molding a connecting piece; fixing the connecting piece in the magnetic rotor; punching and forming a limiting part; pressing and mounting the limiting piece in the connecting piece; penetrating a screw rod through the connecting piece and the limiting piece; and connecting the limiting part with the screw rod through welding.
The technical scheme of the invention is applied, and the electronic expansion valve comprises a magnetic rotor, a connecting piece, a limiting piece, a screw and a guide shaft, wherein at least one part of the connecting piece is fixedly arranged in the magnetic rotor, the connecting piece is provided with a first matching hole, and the connecting piece is of an injection molding structure; the limiting piece is in limiting fit with the connecting piece and is provided with a second matching hole, and the second matching hole is arranged corresponding to the first matching hole; the screw rod penetrates through the first matching hole and is fixedly connected with the inner wall of the second matching hole; the guide shaft is fixedly arranged and extends in the magnetic rotor along the axial direction of the magnetic rotor. By adopting the scheme, the connecting piece is of an injection molding structure and is in limit fit with the limiting piece, compared with the connecting piece of the existing powder metallurgy structure, the manufacturing cost of a single part can be reduced, and the connecting piece and the limiting piece do not need to be welded, so that the assembly cost can be reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an electronic expansion valve provided in an embodiment of the present invention;
fig. 2 shows another view of the electronic expansion valve of fig. 1;
FIG. 3 shows a schematic diagram of a portion of the structure of FIG. 1;
FIG. 4 shows a schematic view of the coupler and the lead axle of FIG. 1;
FIG. 5 shows another schematic view of the linkage and guide shaft of FIG. 4;
fig. 6 shows a schematic structural diagram of the limiting member in fig. 1.
Wherein the figures include the following reference numerals:
10. a magnetic rotor; 20. a connecting member; 21. a first mating hole; 22. a plate body; 23. a boss; 24. a limiting groove; 25. a fabrication hole; 30. a limiting member; 31. a second mating hole; 40. a screw; 50. a guide shaft.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in the accompanying drawings, an embodiment of the present invention provides an electronic expansion valve, including: a magnetic rotor 10; the connecting piece 20, at least a part of the connecting piece 20 is fixedly arranged in the magnetic rotor 10, the connecting piece 20 has a first matching hole 21, and the connecting piece 20 is of an injection molding structure; the limiting piece 30 is matched with the connecting piece 20 in a limiting way, the limiting piece 30 is provided with a second matching hole 31, and the second matching hole 31 is arranged corresponding to the first matching hole 21; the screw 40 penetrates through the first matching hole 21, and the screw 40 is fixedly connected with the inner wall of the second matching hole 31; the guide shaft 50 is fixedly provided, and the guide shaft 50 extends in the magnetic rotor 10 along the axial direction of the magnetic rotor 10.
The technical scheme of the invention is applied, and the electronic expansion valve is provided, and comprises a magnetic rotor 10, a connecting piece 20, a limiting piece, a screw 40 and a guide shaft 50, wherein at least one part of the connecting piece 20 is fixedly arranged in the magnetic rotor 10, the connecting piece 20 is provided with a first matching hole 21, and the connecting piece 20 is of an injection molding structure; the limiting piece is in limiting fit with the connecting piece 20, the limiting piece is provided with a second matching hole 31, and the second matching hole 31 is arranged corresponding to the first matching hole 21; the screw 40 passes through the first matching hole 21, and the screw 40 is fixedly connected with the inner wall of the second matching hole 31; the guide shaft 50 is fixedly provided, and the guide shaft 50 extends in the magnetic rotor 10 in the axial direction of the magnetic rotor 10. By adopting the scheme, the connecting piece 20 is of an injection molding structure, and the connecting piece 20 is in limit fit with the limiting piece, so that compared with the connecting piece 20 of the existing powder metallurgy structure, the manufacturing cost of a single part can be reduced, the connecting piece 20 and the limiting piece do not need to be welded, and the assembly cost can be reduced. The axial movement distance of the magnetic rotor 10 can be limited by the engagement of the guide shaft 50 with other structures. In addition, the first matching hole 21 and the second matching hole 31 limit the screw 40 together, so that the length of a limiting area of the screw 40 can be increased, and the structural strength and the stability are improved.
In the present embodiment, the guide shaft 50 is fixedly connected to the connecting member 20. Thus, the guide shaft 50 can be fixed by fixing the guide shaft 50 to the connector 20.
In the present embodiment, the guide shaft 50 is an injection molded structure. This can reduce the manufacturing cost of the guide shaft 50.
Further, the connecting member 20 and the guide shaft 50 are an integral structure. Thus, the connecting piece 20 and the guide shaft 50 can be manufactured integrally by adopting an injection molding mode, so that the connecting strength is improved, and the manufacturing cost is reduced. Specifically, the connecting member 20 and the guide shaft 50 are made of polyether-based plastic (pps).
In this embodiment, the connecting member 20 includes a plate body 22 and a boss 23 disposed on the plate body 22, the first engaging hole 21 is located on the plate body 22, and the boss 23 is in limit engagement with the limiting member 30. The matching of the boss 23 and the limiting member 30 can be facilitated by the above arrangement.
Optionally, the plate body has tooling holes 25 to reduce the amount of material used. The periphery of the lower end of the first fitting hole 21 is chamfered to facilitate the penetration of the screw 40.
Optionally, the plate body 22 has a third fitting hole, the third fitting hole is communicated with the first fitting hole 21, a diameter of the third fitting hole is larger than a diameter of the first fitting hole 21, and the third fitting hole is located between the first fitting hole 21 and the limiting member 30. The third fitting hole can be filled with solder to facilitate the welding of the screw 40 and the limiting member 30.
In the present embodiment, the boss 23 has a limiting groove 24, at least a portion of the limiting member 30 is disposed in the limiting groove 24, and an outer circumferential surface of the limiting member 30 is in limiting fit with an inner circumferential surface of the limiting groove 24. The limiting member 30 and the connecting member 20 can be circumferentially limited by the above arrangement. Optionally, the limiting member 30 is in interference fit with the limiting groove 24 to improve the connection strength. The limiting member 30 can be assembled in the limiting groove 24 in a press-fitting mode, so that the process is simple, the operation is convenient, and the production cost is low.
In the present embodiment, the outer circumferential surface of the limiting member 30 is composed of a plurality of flat surfaces and/or arc surfaces, and the shape of the inner circumferential surface of the limiting groove 24 matches the shape of the outer circumferential surface of the limiting member 30. The limiting part 30 and the connecting part 20 can be limited in the circumferential direction conveniently by the arrangement, and the relative movement between the limiting part and the connecting part in the circumferential direction is prevented.
In this embodiment, the screw 40 passes through the second fitting hole 31, and the outer wall of the screw 40 is welded to the inner wall of the second fitting hole 31. This can achieve a secure fixation of the screw 40 to the stopper 30. In addition, the screw rod 40 and the connecting piece 20 do not need to be fixedly connected, and the limiting piece 30 and the connecting piece 20 do not need to be welded, so that the three can be reliably fixed, and the assembly is convenient.
Optionally, the screw 40 comprises a first rod section and a second rod section which are connected with each other, the diameter of the first rod section is smaller than that of the second rod section, the first rod section passes through the first matching hole 21 and the second matching hole 31, and a step between the first rod section and the second rod section is abutted with the connecting piece 20 to realize axial limiting and positioning of the first rod section and the second rod section.
In the present embodiment, the outer circumferential surface of the connecting member 20 is composed of a plurality of flat surfaces and/or arc surfaces, the inner wall of the magnet rotor 10 has an annular groove, the periphery of the connecting member 20 is disposed in the annular groove, and the annular bottom wall of the annular groove matches the shape of the outer circumferential surface of the connecting member 20. With the above arrangement, reliable connection of the coupling member 20 and the magnet rotor 10 can be achieved, and relative movement between the two in the circumferential direction is avoided.
Alternatively, in another embodiment not shown, the position limiting member 30 and the connecting member 20 are integrally formed. Therefore, the number of parts can be reduced, and the processing is convenient.
Another embodiment of the present invention provides a method for manufacturing an electronic expansion valve, including: injection molding the connecting member 20; fixing the coupling 20 in the magnet rotor 10; punch forming the limiting member 30; pressing the limiting member 30 in the connecting member 20; the screw rod 40 passes through the connecting piece 20 and the limiting piece 30; the stopper 30 and the screw 40 are connected by welding. By adopting the manufacturing method, the connecting piece 20 is in an injection molding structure, and the connecting piece 20 is in press fit with the limiting piece, compared with the connecting piece 20 in the existing powder metallurgy structure, the manufacturing cost of a single part can be reduced, and the connecting piece 20 and the limiting piece do not need to be welded, so that the assembling cost can be reduced. Moreover, the limiting piece 30 and the screw 40 are connected through welding, so that the operation is convenient, and the quality is reliable. Therefore, the quality of the electronic expansion valve can be improved, and the production cost can be reduced.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
Claims (10)
1. An electronic expansion valve, comprising:
a magnetic rotor (10);
the connecting piece (20), at least a part of the connecting piece (20) is fixedly arranged in the magnetic rotor (10), the connecting piece (20) is provided with a first matching hole (21), and the connecting piece (20) is of an injection molding structure;
the limiting piece (30) is in limiting fit with the connecting piece (20), the limiting piece (30) is provided with a second matching hole (31), and the second matching hole (31) is arranged corresponding to the first matching hole (21);
the screw rod (40) penetrates through the first matching hole (21), and the screw rod (40) is fixedly connected with the inner wall of the second matching hole (31);
and the guide shaft (50) is fixedly arranged, and the guide shaft (50) extends in the magnetic rotor (10) along the axial direction of the magnetic rotor (10).
2. An electronic expansion valve according to claim 1, wherein the pilot shaft (50) is fixedly connected to the connector (20).
3. An electronic expansion valve according to claim 2, wherein the pilot shaft (50) is of injection molded construction.
4. An electronic expansion valve according to claim 3, wherein the connector (20) and the pilot shaft (50) are of one-piece construction.
5. An electronic expansion valve according to claim 1, wherein the connecting member (20) comprises a plate body (22) and a boss (23) provided on the plate body (22), the first fitting hole (21) is located on the plate body (22), and the boss (23) is in limit fitting with the limit piece (30).
6. An electronic expansion valve according to claim 5, wherein the boss (23) has a limiting groove (24), at least a part of the limiting member (30) is disposed in the limiting groove (24), and an outer circumferential surface of the limiting member (30) is in limiting engagement with an inner circumferential surface of the limiting groove (24).
7. An electronic expansion valve according to claim 6, wherein the outer circumferential surface of the stop member (30) is composed of a plurality of flat and/or curved surfaces, and the shape of the inner circumferential surface of the stop groove (24) matches the shape of the outer circumferential surface of the stop member (30).
8. An electronic expansion valve according to claim 1, wherein the screw (40) passes through the second fitting hole (31), and an outer wall of the screw (40) is welded to an inner wall of the second fitting hole (31).
9. An electronic expansion valve according to claim 1, wherein the outer circumferential surface of the connecting member (20) consists of a plurality of flat and/or curved surfaces, the inner wall of the magnetic rotor (10) has an annular groove therein in which the circumferential edge of the connecting member (20) is disposed, and the annular bottom wall of the annular groove matches the shape of the outer circumferential surface of the connecting member (20).
10. A method of manufacturing an electronic expansion valve, the method comprising:
injection molding the connecting piece (20);
-fixing the connection (20) in the magnetic rotor (10);
stamping and forming a limiting piece (30);
pressing the limiting piece (30) in the connecting piece (20);
passing a threaded rod (40) through the connecting member (20) and the retaining member (30);
the limiting piece (30) and the screw rod (40) are connected through welding.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010334313.6A CN113639048A (en) | 2020-04-24 | 2020-04-24 | Electronic expansion valve and manufacturing method thereof |
| PCT/CN2020/138148 WO2021212889A1 (en) | 2020-04-24 | 2020-12-21 | Electronic expansion valve and manufacturing method therefor |
| KR1020227037481A KR102658358B1 (en) | 2020-04-24 | 2020-12-21 | Electronic expansion valve and manufacturing method of electronic expansion valve |
| JP2022549423A JP7431993B2 (en) | 2020-04-24 | 2020-12-21 | electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010334313.6A CN113639048A (en) | 2020-04-24 | 2020-04-24 | Electronic expansion valve and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113639048A true CN113639048A (en) | 2021-11-12 |
Family
ID=78271095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010334313.6A Pending CN113639048A (en) | 2020-04-24 | 2020-04-24 | Electronic expansion valve and manufacturing method thereof |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7431993B2 (en) |
| CN (1) | CN113639048A (en) |
| WO (1) | WO2021212889A1 (en) |
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| CN108571595A (en) | 2017-03-10 | 2018-09-25 | 浙江盾安机械有限公司 | Electric expansion valve |
| CN209370494U (en) | 2019-01-13 | 2019-09-10 | 浙江恒森实业集团有限公司 | A kind of electric expansion valve rotor assembly using Elastic buckle nut |
-
2020
- 2020-04-24 CN CN202010334313.6A patent/CN113639048A/en active Pending
- 2020-12-21 JP JP2022549423A patent/JP7431993B2/en active Active
- 2020-12-21 WO PCT/CN2020/138148 patent/WO2021212889A1/en active Application Filing
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| US20080067464A1 (en) * | 2006-09-20 | 2008-03-20 | Fujikoki Corporation | Motor-operated valve |
| CN102454818A (en) * | 2010-10-15 | 2012-05-16 | 浙江三花股份有限公司 | Electric valve |
| CN103470842A (en) * | 2013-09-30 | 2013-12-25 | 苏州优冷机电科技有限公司 | Magnetic rotor assembly and electronic expansion valve with magnetic rotor assembly |
| WO2015106724A1 (en) * | 2014-01-20 | 2015-07-23 | 浙江三花股份有限公司 | Direct-action-type electrically-operated valve and assembly method therefor |
| CN105889531A (en) * | 2015-02-16 | 2016-08-24 | 株式会社Tgk | Motor operated valve |
| CN209180457U (en) * | 2018-10-22 | 2019-07-30 | 浙江盾安禾田金属有限公司 | Electric expansion valve |
| CN109958779A (en) * | 2019-04-24 | 2019-07-02 | 浙江恒森实业集团有限公司 | A kind of electric expansion valve rotor assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7431993B2 (en) | 2024-02-15 |
| JP2023520292A (en) | 2023-05-17 |
| WO2021212889A1 (en) | 2021-10-28 |
| KR20220158074A (en) | 2022-11-29 |
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