WO2021031682A1 - 电子膨胀阀及其安装方法 - Google Patents

电子膨胀阀及其安装方法 Download PDF

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Publication number
WO2021031682A1
WO2021031682A1 PCT/CN2020/097222 CN2020097222W WO2021031682A1 WO 2021031682 A1 WO2021031682 A1 WO 2021031682A1 CN 2020097222 W CN2020097222 W CN 2020097222W WO 2021031682 A1 WO2021031682 A1 WO 2021031682A1
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WO
WIPO (PCT)
Prior art keywords
assembly
electronic expansion
valve
diameter section
nut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2020/097222
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English (en)
French (fr)
Inventor
曾庆军
陈勇好
徐冠军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Dunan Artificial Environment Co Ltd
Original Assignee
Zhejiang Dunan Artificial Environment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Dunan Artificial Environment Co Ltd filed Critical Zhejiang Dunan Artificial Environment Co Ltd
Priority to JP2021577294A priority Critical patent/JP7356521B2/ja
Priority to KR1020227002605A priority patent/KR102624431B1/ko
Publication of WO2021031682A1 publication Critical patent/WO2021031682A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • 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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/42—Valve seats
    • 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
    • F16K1/48—Attaching valve members to screw-spindles
    • 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
    • F16K1/48—Attaching valve members to screw-spindles
    • F16K1/487—Attaching valve members to screw-spindles by a fixing element extending in the axial direction of the spindle, e.g. a screw
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
    • 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
    • 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

Definitions

  • This application relates to the technical field of valves, and in particular to an electronic expansion valve and an installation method thereof.
  • the three parts are made of metal materials. Metal impact noise is loud during operation, especially in the existing multi-line system.
  • the electronic expansion valve is installed on the indoor side, and the operating noise of the electronic expansion valve cannot satisfy people. The comfortable use requirements;
  • the main purpose of this application is to provide an electronic expansion valve and an installation method thereof, so as to solve the problem of high noise during the operation of the electronic expansion valve in the prior art.
  • an electronic expansion valve including: a valve seat assembly, the valve seat assembly having a first connection port and a second connection port communicating with an external pipeline; a nut assembly, a nut The assembly includes a small-diameter section and a large-diameter section connected in sequence, the large-diameter section is connected with the valve seat assembly, the small-diameter section has a first stopper protrusion, and the large-diameter section has a second stopper protrusion; valve needle assembly, valve needle assembly Through the nut assembly, the lower end has a valve needle section, and the upper end is threadedly connected with the nut assembly; the rotor assembly, the rotor assembly is fixedly connected to the valve needle assembly through the top, and drives the valve needle assembly to rotate, the valve needle assembly is along the axial direction of the electronic expansion valve Move to control the on-off state between the first connection port and the second connection port, the rotor assembly has
  • valve needle assembly includes a reduced diameter section, an enlarged diameter section and a valve needle section that are sequentially connected.
  • the valve needle assembly extends from the large diameter section into the nut assembly, and the reduced diameter section is located at the small diameter section, and the enlarged diameter section is located at At the large diameter section, the valve needle section is located in the valve seat assembly, and the small diameter section is threadedly connected with the reduced diameter section.
  • the rotor assembly includes: a rotor, the rotor has an inverted U-shaped structure and is arranged on the outside of the nut assembly, the third stop protrusion is located inside the rotor, and the valve needle assembly penetrates through the end surface of the rotor; the insert is arranged on the rotor Between the end face of the rotor and the valve needle assembly, the rotor drives the valve needle assembly to rotate through the insert.
  • the end face of the rotor is provided with a demolding hole, and along the axial direction of the rotor assembly, the demolding hole faces the third stop protrusion.
  • the nut assembly includes: a nut, the nut has a large diameter section and a small diameter section; a connecting plate, the connecting plate is arranged on the outer side of the nut and is integrally injection molded with the nut, and the connecting plate is connected with the valve seat assembly.
  • the length of the first stop protrusion is different from the length of the second stop protrusion.
  • the distance from the end of the first stopping protrusion to the center line of the nut is equal to the distance from the second stopping protrusion to the center line of the nut.
  • the outer side of the large diameter section is provided with a plurality of positioning ribs, the positioning ribs abut against the inner wall of the valve seat assembly, and each positioning rib is arranged along the circumference of the large diameter section.
  • a gap is formed between the outer wall of the large-diameter section without positioning ribs and the inner wall of the valve seat assembly, and the connecting plate is provided with a via hole which communicates with the gap and forms a passage for fluid to pass through.
  • the nut also has a balance hole, and the balance hole is opened toward the axis of the nut.
  • a positioning step is formed on the end surface of the large-diameter section close to the small-diameter section, and the third stopper protrusion can abut on the positioning step to control the movement range of the rotor assembly.
  • first stop protrusion, the second stop protrusion and the third stop protrusion are all plastic parts.
  • the electronic expansion valve further includes a sleeve, the sleeve is connected to the valve seat assembly, and forms a containing cavity with the valve seat assembly, the first connecting port and the second connecting port are both located outside the containing cavity, the nut assembly, the valve needle assembly and The rotor components are all located in the containing cavity.
  • valve seat assembly includes: a valve seat, the valve seat has a first connection port and a second connection port, a part of the nut assembly extends into the valve seat; a sleeve seat, the sleeve seat is arranged outside the valve seat and connected to the valve seat The socket is connected, and the sleeve is connected with the sleeve socket.
  • an installation method of an electronic expansion valve is the above-mentioned electronic expansion valve.
  • the installation method includes: assembling the components of the valve seat assembly of the electronic expansion valve; The components of the valve needle assembly of the expansion valve are assembled together; the reduced diameter section of the valve needle assembly extends from the large diameter section of the nut assembly of the electronic expansion valve into the nut assembly, and is screwed into the small diameter section of the nut assembly; Install the nut assembly on the valve seat assembly; install the rotor assembly of the electronic expansion valve to the outside of the nut assembly, and abut the third stop protrusion of the rotor assembly with the second stop protrusion of the nut assembly to adjust the valve needle assembly Extend the distance of the valve seat assembly to fully close the electronic expansion valve, connect the valve needle assembly and the rotor assembly together; sleeve the sleeve of the electronic expansion valve on the outside of the rotor assembly and connect it with the valve seat assembly.
  • the valve needle assembly is driven to rotate by the rotor assembly, and the nut assembly is fixedly arranged with respect to the valve seat assembly. Since the valve needle assembly and the nut assembly are connected by a threaded structure, the valve needle assembly rotates along the axis.
  • the third stop protrusion on the rotor assembly abuts against the first stop protrusion on the nut assembly, so that the rotor assembly cannot continue to rotate.
  • the third stop protrusion on the rotor assembly abuts against the second stop protrusion on the nut assembly, so that the rotor assembly cannot continue to rotate.
  • the above arrangement method does not need to use springs, slip rings and other parts, and the valve needle assembly can be directly driven to rotate by the rotor assembly to realize the opening and closing of the electronic expansion valve, thereby avoiding the problem of large noise caused by metal impact.
  • the third stopper protrusion is kept at a certain distance from both ends of the rotor assembly, that is, the third stopper protrusion is not located at the end of the rotor assembly, so the third stopper protrusion is closer to the center of the rotor assembly.
  • the arm arrangement is better, while making the stop force more reasonable, it improves the overall strength of the rotor assembly, is more durable, and will not interfere with the magnetism of the end of the rotor assembly, so that the third Both sides of the stop protrusion have a magnetic effect, the rotor assembly can be better subjected to the magnetic force of the energized coil, and the facing area between the rotor assembly and the external magnetic ring is larger, and the stroke requirement of the valve needle assembly is further optimized.
  • Figure 1 shows a schematic structural diagram of the electronic expansion valve of the present application when it is fully opened
  • Figure 2 shows a schematic structural diagram of the electronic expansion valve in Figure 1 when it is fully closed
  • Fig. 3 shows a schematic structural view of the rotor assembly of the electronic expansion valve in Fig. 1;
  • Figure 4 shows a top view of Figure 3
  • Figure 5 shows a structural schematic diagram of the nut assembly and valve seat assembly of the electronic expansion valve in Figure 1;
  • Fig. 6 shows a schematic structural view of the nut assembly of the electronic expansion valve in Fig. 1.
  • Valve seat assembly 11. First connecting port; 12. Second connecting port; 13. Valve seat; 14. Casing seat; 20. Nut assembly; 21. Small diameter section; 211. First stop protrusion; 22. Large diameter section; 221. Second stop protrusion; 23. Nut; 24. Connecting plate; 241. Via hole; 25. Positioning rib; 26. Balance hole; 27. Positioning step; 30. Valve needle assembly; 31. Reduced diameter section; 32. Expanded diameter section; 33. Valve needle section; 40. Rotor assembly; 41. Third stop protrusion; 42. Rotor; 43. Insert; 44. Stripping hole; 50. Set tube.
  • the directional words used such as “up, down, top, bottom” are usually directed to the direction shown in the drawings, or refer to the vertical, In terms of vertical or gravitational direction; similarly, for ease of understanding and description, “inner and outer” refers to the inner and outer relative to the contour of each component itself, but the above-mentioned orientation words are not used to limit the application.
  • the present application provides an electronic expansion valve and an installation method thereof.
  • An electronic expansion valve as shown in FIGS. 1 to 6 includes a valve seat assembly 10, a nut assembly 20, a valve needle assembly 30, and a rotor assembly 40.
  • the valve seat assembly 10 has a first connection port 11 communicating with an external pipeline. And the second connecting port 12;
  • the nut assembly 20 includes a small diameter section 21 and a large diameter section 22 connected in sequence, the large diameter section 22 is connected to the valve seat assembly 10, the small diameter section 21 has a first stop protrusion 211, the large diameter section 22 has a second stop protrusion 221;
  • the valve needle assembly 30 is provided through the nut assembly 20, and its lower end has a valve needle section 33, and the upper end is threadedly connected with the nut assembly 20;
  • the rotor assembly 40 is fixedly connected to the valve needle assembly 30 through the top, and The valve needle assembly 30 is driven to rotate, and the valve needle assembly 30 moves along the axial direction of the electronic expansion valve to control the on-off state between the first connecting port 11 and the second connecting port 12.
  • the rotor assembly 40 has a third stopper protrusion 41, and the third stop protrusion 41 protrudes and extends inward from a position deviated from the bottom of the rotor assembly 40.
  • the third stop protrusion 41 abuts against the first stop protrusion 211
  • the third stop protrusion 41 abuts against the second stop protrusion 221.
  • the rotor assembly 40 drives the valve needle assembly 30 to rotate, and the nut assembly 20 is fixedly arranged relative to the valve seat assembly 10. Since the valve needle assembly 30 and the nut assembly 20 are connected by a threaded structure, the valve needle assembly 30 rotates at the same time Will move in the axial direction, when the valve needle assembly 30 moves to the fully open electronic expansion valve, as shown in Figure 1, the third stop protrusion 41 on the rotor assembly 40 and the first stop protrusion 211 on the nut assembly 20 Contact, so that the rotor assembly 40 cannot continue to rotate, when the valve needle assembly 30 moves to the fully closed electronic expansion valve, as shown in Figure 2, the third stop protrusion 41 on the rotor assembly 40 and the nut assembly 20 The second stop protrusion 221 abuts, so that the rotor assembly 40 cannot continue to rotate.
  • the above arrangement does not require springs, slip rings and other parts, and the valve needle assembly 30 is directly driven to rotate by the rotor assembly 40 to realize the opening and closing of the electronic expansion valve, thereby avoiding the problem of large noise caused by metal impact.
  • the third stop protrusion 41 is kept at a certain distance from both ends of the rotor assembly 40, that is, the third stop protrusion 41 is not located at the end of the rotor assembly 40, so the third stop protrusion 41 is away from the rotor assembly 40.
  • the center of the rotor assembly is closer, and the force arm is set more optimally.
  • the overall strength of the rotor assembly 40 is improved, it is more durable, and will not interfere with the magnetism of the end of the rotor assembly 40, making the edge In the axial direction of the rotor assembly 40, both sides of the third stop protrusion 41 have a magnetic effect, the rotor assembly 40 can better receive the magnetic force of the energized coil, and the area facing the rotor assembly 40 and the external magnetic ring is larger.
  • the stroke requirement of the valve needle assembly 30 is further optimized.
  • the valve needle assembly 30 includes a reduced diameter section 31, an enlarged diameter section 32, and a valve needle section 33 that are sequentially connected.
  • the valve needle assembly 30 extends from the large diameter section 22 into the nut assembly 20, and has a reduced diameter.
  • the section 31 is located at the small diameter section 21, the enlarged diameter section 32 is located at the large diameter section 22, the valve needle section 33 is located in the valve seat assembly 10, and the small diameter section 21 and the reduced diameter section 31 are threadedly connected.
  • the valve needle assembly 30 of this embodiment includes a valve needle, a gasket, a spring, a bushing, a spring sleeve, and a screw.
  • valve needle is used as the valve needle section 33
  • the spring sleeve is used as the enlarged diameter section 32
  • the screw is used as the reduced diameter section 31.
  • the needle extends into the valve seat 13 to control the on-off of the first connection port 11 and the second connection port 12.
  • the rotor assembly 40 includes a rotor 42 and an insert 43.
  • the rotor 42 has an inverted U-shaped structure and is arranged on the outside of the nut assembly 20.
  • the third stop protrusion 41 is located inside and along the rotor 42.
  • the rotor 42 extends in the radial direction, the rotor 42 is open to one end of the valve seat assembly 10, and the end away from the valve seat assembly 10 is sealed.
  • the valve needle assembly 30 penetrates the end face of the rotor 42 and is integrated with the rotor 42 by injection molding.
  • the insert 43 is in the shape of a sleeve.
  • the insert 43 is sleeved on the valve needle assembly 30 and is located between the end surface of the rotor 42 and the valve needle assembly 30, that is, the rotor 42 is drivingly connected to the valve needle assembly 30 through the insert 43, thereby The rotor 42 drives the valve needle assembly 30 to rotate through the insert 43 to drive the valve needle assembly 30.
  • the end surface of the rotor 42 is provided with a demolding hole 44, and along the axial direction of the rotor assembly 40, the demolding hole 44 is facing the third stop protrusion 41. The demolding hole 44 facilitates the demolding process and the third stopper. Processing of protrusion 41.
  • the nut assembly 20 includes a nut 23 and a connecting plate 24.
  • the nut 23 has a large diameter section 22 and a small diameter section 21; the connecting plate 24 is arranged outside the nut 23 , And integrated with the nut 23 by injection molding.
  • the connecting plate 24 abuts against the valve seat assembly 10, indicating that the nut assembly 20 is installed in place, and then the connecting plate 24 is welded by laser welding. Just connect with the valve seat assembly 10.
  • the length of the first stop protrusion 211 is the same as the length of the second stop protrusion 211.
  • the length of the protrusion 221 is different, and it is preferable that the distance from the end of the first stop protrusion 211 to the center line of the nut 23 is equal to the distance from the second stop protrusion 221 to the center line of the nut 23 to ensure that the first stop protrusion Both the tab 211 and the second stop protrusion 221 can reliably abut against the third stop protrusion 41 to achieve a limiting effect.
  • the outer side of the large diameter section 22 has a plurality of positioning ribs 25, the positioning ribs 25 extend along the axial direction of the large diameter section 22, and when the large diameter section 22 is installed in the valve seat assembly 10, the positioning ribs 25 is an interference fit with the inner wall of the valve seat assembly 10 to ensure the coaxiality of the installation.
  • the connecting plate 24 is provided with a through hole 241 which communicates with the gap and forms a balance channel for fluid to pass through.
  • the nut 23 further has a balance hole 26, which penetrates the nut 23 from the outer side of the nut 23 toward the axis of the nut 23.
  • the balance hole 26 is opened along the radial direction of the nut 23, of course, it can also be opened obliquely at a certain angle.
  • a positioning step 27 is formed on the end surface of the large-diameter section 22 close to the small-diameter section 21.
  • the positioning step 27 cooperates with the second stopper protrusion 221 to jointly stop the movement of the third stopper protrusion 41.
  • the third stop protrusion 41 abuts against the second stop protrusion 221, the third stop protrusion 41 also abuts against the positioning step 27, thereby more reliably controlling the movement range of the rotor assembly 40.
  • the first stop protrusion 211, the second stop protrusion 221 and the third stop protrusion 41 are all plastic parts. Because it is a plastic part, the impact sound is small when the stop is limited.
  • the three stopper protrusions are all injection molded in the mold. The mold has high precision and good dimensional consistency. When the electronic expansion valve is reset, there is no rebound situation, and the initial position is consistent. Improved the flow accuracy of the electronic expansion valve.
  • the nut 23 is made of pure plastic as a whole, and the rotor 42 is made of magnetic powder by adding magnetic powder to the plastic, so that it can be realized in It satisfies the magnetic requirements of the rotor 42 while reducing the impact sound. Since the insert 43 does not collide, it can be provided as a metal piece.
  • the electronic expansion valve further includes a sleeve 50, which is connected to the valve seat assembly 10 and forms a containing cavity with the valve seat assembly 10.
  • the first connection port 11 and the second connection port 12 are both Located outside the containing cavity, the nut assembly 20, the valve needle assembly 30 and the rotor assembly 40 are all located in the containing cavity.
  • the sleeve 50 protects the non-exposed structure of the electronic expansion valve without affecting the normal use of the electronic expansion valve.
  • the energized coil can be wound on the outside of the sleeve 50 to drive the rotor 42.
  • the valve seat assembly 10 includes a valve seat 13 and a sleeve seat 14.
  • the valve seat 13 has a first connection port 11 and a second connection port 12, and the large diameter section 22 of the nut 23 extends into the valve seat 13. , And an interference fit with the valve seat 13.
  • the connecting plate 24 abuts the sleeve seat 14 to indicate the installation is in place, and the valve seat 13 acts as an electronic expansion
  • the basic components of the valve provide basic support.
  • the sleeve seat 14 is arranged outside the valve seat 13 and connected to the valve seat 13, the sleeve 50 is connected to the sleeve seat 14, and the sleeve seat 14 is used for the installation of the sleeve 50 and
  • the tube base 14 can also be provided with a coil disk for combing and winding coils.
  • This embodiment also provides an installation method of the electronic expansion valve, the electronic expansion valve is the above-mentioned electronic expansion valve, and the installation method is:
  • valve seat assembly 10 of the electronic expansion valve First assemble the components of the valve seat assembly 10 of the electronic expansion valve.
  • the valve seat 13, the external connecting pipe and the sleeve seat 14 are welded together to form the valve seat assembly 10; and the valve needle assembly 30 of the electronic expansion valve
  • the components are assembled together, the valve needle, gasket, spring, bushing, spring sleeve, and screw are assembled together to form the valve needle assembly 30; then the reduced diameter section 31 of the valve needle assembly 30 is replaced by the larger size of the nut assembly 20 of the electronic expansion valve.
  • the diameter section 22 extends into the nut assembly 20 and is screwed into the small diameter section 21 of the nut assembly 20.
  • the nut assembly 20 is installed on the valve seat assembly 10, and the connecting plate 24 and the sleeve seat 14 are welded to each other by laser welding. Together; install the rotor assembly 40 of the electronic expansion valve to the outside of the nut assembly 20, and abut the side of the third stop protrusion 41 of the rotor assembly 40 with the second stop protrusion 221 of the nut assembly 20 and the third stop The other side of the stop protrusion 41 abuts the positioning step 27 on the nut 23, and then adjust the position of the valve needle assembly 30, adjust the distance that the valve needle assembly 30 extends into the valve seat assembly 10, and screw the valve needle assembly 30 To the 0 pulse position, the electronic expansion valve is fully closed.
  • the electronic expansion valve is in a fully closed state when the third stop protrusion 41 abuts the second stop protrusion 221, and then the screw and The insert 43 is laser-welded and welded together; finally, the sleeve 50 of the electronic expansion valve is sleeved on the outside of the rotor assembly 40 and laser-welded with the sleeve seat 14 to complete the assembly of the electronic expansion valve.
  • the third stop protrusion is closer to the center, the moment arm is set better, the overall strength is higher, and it is more durable;
  • the third stop protrusion will not interfere with the magnetism of the end of the rotor assembly, the rotor assembly can be better affected by the magnetic force of the energized coil, and the facing area of the rotor assembly is larger, which can meet the travel requirements of the valve needle assembly ;

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

一种电子膨胀阀及其安装方法。其中，电子膨胀阀包括：阀座组件（10）；螺母组件（20），螺母组件（20）包括顺次连接的小径段（21）和大径段（22），大径段（22）与阀座组件（10）连接，小径段（21）具有第一止挡凸起（211），大径段（22）具有第二止挡凸起（221）；阀针组件（30），阀针组件（30）贯穿螺母组件（20）设置，其下端具有阀针段（33），上端与螺母组件（20）螺纹连接；转子组件（40），转子组件（40）通过顶部与阀针组件（30）固定连接，并驱动阀针组件（30）转动，转子组件（40）具有第三止挡凸起（41），且第三止挡凸起（41）自偏离转子组件（40）底部的位置朝内凸出延伸设置，当电子膨胀阀全开时，第三止挡凸起（41）与第一止挡凸起（211）抵接，当电子膨胀阀全关时，第三止挡凸起（41）与第二止挡凸起（221）抵接。解决了现有技术中的电子膨胀阀运转过程中噪音较大的问题。

Description

电子膨胀阀及其安装方法 技术领域
本申请涉及阀门技术领域，具体而言，涉及一种电子膨胀阀及其安装方法。
背景技术
现有技术电子膨胀阀的全开和全关限位功能是通过弹簧导轨、滑环、以及安装在转子上的止挡杆共同作用来实现的，当驱动阀体时，止动杆跟随转子一起转动，拨动滑环在弹簧导轨行程内滑动，此结构存在两个缺点：
1、三个零件都是金属材质制作而成，在运转过程中金属撞击噪音较大，尤其是现有的多联机系统，电子膨胀阀安装在室内侧，电子膨胀阀发出的运行噪音无法满足人们的舒适性使用要求；
2、弹簧导轨安装时只固定了端，另一端无固定，处于自由状态，弹簧导轨容易变形，从而导致滑环的位置精度不够，尤其是当电子膨胀阀复位操作时，滑环的初始位置波动较大，导致电子膨胀阀流量调节精度不够，影响空调系统能效。
发明内容
本申请的主要目的在于提供一种电子膨胀阀及其安装方法，以解决现有技术中的电子膨胀阀运转过程中噪音较大的问题。
为了实现上述目的，根据本申请的一个方面，提供了一种电子膨胀阀，包括：阀座组件，阀座组件具有与外部管路连通的第一连接口和第二连接口；螺母组件，螺母组件包括顺次连接的小径段和大径段，大径段与阀座组件连接，小径段具有第一止挡凸起，大径段具有第二止挡凸起；阀针组件，阀针组件贯穿螺母组件设置，其下端具有阀针段，上端与螺母组件螺纹连接；转子组件，转子组件通过顶部与阀针组件固定连接，并驱动阀针组件转动，阀针组件沿电子膨胀阀的轴向运动，以控制第一连接口与第二连接口之间的通断状态，转子组件具有第三止挡凸起，且第三止挡凸起自偏离转子组件底部的位置朝内凸出延伸设置，当电子膨胀阀全开时，第三止挡凸起与第一止挡凸起抵接，当电子膨胀阀全关时，第三止挡凸起与第二止挡凸起抵接。
进一步地，阀针组件包括顺次连接的缩径段、扩径段和阀针段，阀针组件由大径段伸入至螺母组件内，且缩径段位于小径段处，扩径段位于大径段处，阀针段位于阀座组件内，小径段与缩径段螺纹连接。
进一步地，转子组件包括：转子，转子呈倒U字形结构，并罩设在螺母组件外侧，第三止挡凸起位于转子内侧，阀针组件贯穿转子的端面；嵌件，嵌件设置在转子的端面与阀针组 件之间，转子通过嵌件带动阀针组件转动，转子的端面开设有脱模孔，且沿转子组件的轴向，脱模孔正对第三止挡凸起。
进一步地，螺母组件包括：螺母，螺母具有大径段和小径段；连接板，连接板设置在螺母外侧，并与螺母一体注塑成型，连接板与阀座组件连接。
进一步地，第一止挡凸起的长度与第二止挡凸起的长度不同。
进一步地，第一止挡凸起的端部到螺母中心线的距离与第二止挡凸起到螺母中心线的距离相等。
进一步地，大径段的外侧具有多个定位筋，定位筋与阀座组件的内壁抵接，各定位筋沿大径段的周向设置。
进一步地，大径段未设置有定位筋的外壁与阀座组件的内壁之间形成缝隙，连接板开设有过孔，过孔与缝隙连通并形成供流体通过的通道。
进一步地，螺母还具有平衡孔，平衡孔朝螺母的轴线开设。
进一步地，大径段靠近小径段的端面形成有定位台阶，第三止挡凸起能够抵接在定位台阶上，以控制转子组件的运动范围。
进一步地，第一止挡凸起、第二止挡凸起和第三止挡凸起均为塑料件。
进一步地，电子膨胀阀还包括套管，套管与阀座组件连接，并与阀座组件形成容纳腔，第一连接口和第二连接口均位于容纳腔外，螺母组件、阀针组件和转子组件均位于容纳腔内。
进一步地，阀座组件包括：阀座，阀座具有第一连接口和第二连接口，螺母组件的一部分伸入至阀座内；套管座，套管座设置在阀座外侧并与阀座连接，套管与套管座连接。
根据本申请的另一方面，提供了一种电子膨胀阀的安装方法，电子膨胀阀为上述的电子膨胀阀，安装方法包括：将电子膨胀阀的阀座组件的各部件组装在一起；将电子膨胀阀的阀针组件的各部件组装在一起；将阀针组件的缩径段由电子膨胀阀的螺母组件的大径段伸入螺母组件内，并拧入到螺母组件的小径段上；将螺母组件安装到阀座组件上；将电子膨胀阀的转子组件安装到螺母组件外侧，并将转子组件的第三止挡凸起与螺母组件的第二止挡凸起抵接，调整阀针组件伸入阀座组件的距离，使电子膨胀阀全关，将阀针组件与转子组件连接在一起；将电子膨胀阀的套管套在转子组件外侧，并与阀座组件连接在一起。
应用本申请的技术方案，通过转子组件带动阀针组件转动，螺母组件相对于阀座组件固定设置，由于阀针组件与螺母组件之间通过螺纹结构连接，因而阀针组件转动的同时会沿轴向运动，当阀针组件运动到电子膨胀阀全开时，转子组件上的第三止挡凸起与螺母组件上第一止挡凸起抵接，从而使得转子组件无法继续转动，当阀针组件运动到电子膨胀阀全关时，转子组件上的第三止挡凸起与螺母组件上的第二止挡凸起抵接，从而也使得转子组件无法继续转动。上述设置方式不需要采用弹簧、滑环等零件，通过转子组件直接带动阀针组件转动即可实现电子膨胀阀的打开和关闭，从而避免了金属撞击产生的噪音较大的问题。并且由于 第三止挡凸起与转子组件的两端均保持一定距离，即第三止挡凸起并非位于转子组件的端部，这样第三止挡凸起距离转子组件的中心较近，力臂设置更优，在使止挡受力更合理的同时，提高了转子组件的整体强度，更加耐用，并且不会对转子组件端部的磁性产生干扰，使得沿转子组件的轴向，第三止挡凸起的两侧均具有磁性作用，转子组件能够更好地受到通电线圈的磁力作用，转子组件与外部磁环的正对面积更大，进一步优化了阀针组件的行程需求。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了本申请的电子膨胀阀全开时的结构示意图；
图2示出了图1中的电子膨胀阀全关时的结构示意图；
图3示出了图1中的电子膨胀阀的转子组件的结构示意图；
图4示出了图3的俯视图；
图5示出了图1中的电子膨胀阀的螺母组件和阀座组件的结构示意图；以及
图6示出了图1中的电子膨胀阀的螺母组件的结构示意图。
其中，上述附图包括以下附图标记：
10、阀座组件；11、第一连接口；12、第二连接口；13、阀座；14、套管座；20、螺母组件；21、小径段；211、第一止挡凸起；22、大径段；221、第二止挡凸起；23、螺母；24、连接板；241、过孔；25、定位筋；26、平衡孔；27、定位台阶；30、阀针组件；31、缩径段；32、扩径段；33、阀针段；40、转子组件；41、第三止挡凸起；42、转子；43、嵌件；44、脱模孔；50、套管。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
需要指出的是，除非另有指明，本申请使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。
在本申请中，在未作相反说明的情况下，使用的方位词如“上、下、顶、底”通常是针对附图所示的方向而言的，或者是针对部件本身在竖直、垂直或重力方向上而言的；同样地，为便于理解和描述，“内、外”是指相对于各部件本身的轮廓的内、外，但上述方位词并不用于限制本申请。
为了解决现有技术中的电子膨胀阀运转过程中噪音较大的问题，本申请提供了一种电子膨胀阀及其安装方法。
如图1至图6所示的一种电子膨胀阀，包括阀座组件10、螺母组件20、阀针组件30和转子组件40，阀座组件10具有与外部管路连通的第一连接口11和第二连接口12；螺母组件20包括顺次连接的小径段21和大径段22，大径段22与阀座组件10连接，小径段21具有第一止挡凸起211，大径段22具有第二止挡凸起221；阀针组件30贯穿螺母组件20设置，其下端具有阀针段33，上端与螺母组件20螺纹连接；转子组件40通过顶部与阀针组件30固定连接，并驱动阀针组件30转动，阀针组件30沿电子膨胀阀的轴向运动，以控制第一连接口11与第二连接口12之间的通断状态，转子组件40具有第三止挡凸起41，且第三止挡凸起41自偏离转子组件40底部的位置朝内凸出延伸设置，当电子膨胀阀全开时，第三止挡凸起41与第一止挡凸起211抵接，当电子膨胀阀全关时，第三止挡凸起41与第二止挡凸起221抵接。
本实施例通过转子组件40带动阀针组件30转动，螺母组件20相对于阀座组件10固定设置，由于阀针组件30与螺母组件20之间通过螺纹结构连接，因而阀针组件30转动的同时会沿轴向运动，当阀针组件30运动到电子膨胀阀全开时，如图1所示，转子组件40上的第三止挡凸起41与螺母组件20上第一止挡凸起211抵接，从而使得转子组件40无法继续转动，当阀针组件30运动到电子膨胀阀全关时，如图2所示，转子组件40上的第三止挡凸起41与螺母组件20上的第二止挡凸起221抵接，从而也使得转子组件40无法继续转动。上述设置方式不需要采用弹簧、滑环等零件，通过转子组件40直接带动阀针组件30转动即可实现电子膨胀阀的打开和关闭，从而避免了金属撞击产生的噪音较大的问题。并且由于第三止挡凸起41与转子组件40的两端均保持一定距离，即第三止挡凸起41并非位于转子组件40的端部，这样第三止挡凸起41距离转子组件40的中心较近，力臂设置更优，在使止挡受力更合理的同时，提高了转子组件40的整体强度，更加耐用，并且不会对转子组件40端部的磁性产生干扰，使得沿转子组件40的轴向，第三止挡凸起41的两侧均具有磁性作用，转子组件40能够更好地受到通电线圈的磁力作用，转子组件40与外部磁环的正对面积更大，进一步优化了阀针组件30的行程需求。
在本实施例中，阀针组件30包括顺次连接的缩径段31、扩径段32和阀针段33，阀针组件30由大径段22伸入至螺母组件20内，且缩径段31位于小径段21处，扩径段32位于大径段22处，阀针段33位于阀座组件10内，小径段21与缩径段31螺纹连接。本实施例的阀针组件30包括阀针、垫片、弹簧、衬套、弹簧套以及螺杆，其中阀针作为阀针段33、弹簧套作为扩径段32，螺杆作为缩径段31，阀针伸入到阀座13内实现对第一连接口11和第二连接口12通断的控制，阀针远离第一连接口11的一端与垫片抵接，螺杆伸入到螺母23内并与螺母23螺纹连接，弹簧同时套设在螺杆和垫片上并且其两端分别与螺杆和垫片抵接，从而使得螺杆和垫片具有彼此远离的运动趋势，螺杆与垫片之间留有较小的缝隙，当转子组件40驱动螺杆运动略大时，阀针和垫片由于抵接阀座13而无法继续运动，此时螺杆可以继续压缩弹簧而不带动垫片运动，使得螺杆的运动具有一定的余量，弹簧套套设在弹簧外侧并与螺杆和垫片连接，从而对弹簧进行保护。
如图3和图4所示，转子组件40包括转子42和嵌件43，转子42呈倒U字形结构，并罩设在螺母组件20外侧，第三止挡凸起41位于转子42内侧并沿转子42的径向伸出，转子42朝向阀座组件10的一端敞口设置，背离阀座组件10的一端封口设置，阀针组件30贯穿转子42封口设置的端面并与转子42一体注塑成型，嵌件43呈套筒状，嵌件43套设在阀针组件30上，并且位于转子42的端面与阀针组件30之间，即转子42通过嵌件43与阀针组件30驱动连接，从而使得转子42通过嵌件43带动阀针组件30转动实现对阀针组件30的驱动。此外，转子42的端面开设有脱模孔44，且沿转子组件40的轴向，脱模孔44正对第三止挡凸起41，脱模孔44便于脱模工艺，方便第三止挡凸起41的加工。
如图5和图6所示，螺母组件20包括螺母23和连接板24，螺母23作为螺母组件20最主要的部件，其具有大径段22和小径段21；连接板24设置在螺母23外侧，并与螺母23一体注塑成型，当将螺母23安装到阀座组件10上时，连接板24与阀座组件10抵接，说明螺母组件20安装到位，再通过激光焊等方式将连接板24与阀座组件10连接在一起即可。
可选地，由于第一止挡凸起211和第二止挡凸起221由螺母23不同直径的节段开始沿径向延伸的，因而第一止挡凸起211的长度与第二止挡凸起221的长度不同，并且优选第一止挡凸起211的端部到螺母23中心线的距离与第二止挡凸起221到螺母23中心线的距离相等，以保证第一止挡凸起211与第二止挡凸起221二者均能够与第三止挡凸起41可靠抵接实现限位作用。
如图6所示，大径段22的外侧具有多个定位筋25，定位筋25沿大径段22的轴向延伸，并且当将大径段22安装到阀座组件10内时，定位筋25与阀座组件10的内壁过盈配合，从而保证安装的同轴度。定位筋25一般设置有3～4个，各定位筋25沿大径段22的周向等间隔设置。
由于定位筋25位于大径段22的外壁与阀座组件10的内壁之间，因而大径段22未设置有定位筋25的外壁与阀座组件10的内壁之间自然形成有缝隙作为平衡腔，并且连接板24开设有过孔241，过孔241与缝隙连通并形成供流体通过的平衡通道。
可选地，螺母23还具有平衡孔26，平衡孔26由螺母23的外侧朝螺母23的轴线贯穿螺母23。优选地，平衡孔26沿螺母23的径向开设，当然，也可以倾斜一定的角度斜向开设。
在本实施例中，大径段22靠近小径段21的端面形成有定位台阶27，定位台阶27与第二止挡凸起221配合，共同止挡第三止挡凸起41的运动，当第三止挡凸起41与第二止挡凸起221抵接时，第三止挡凸起41也与定位台阶27抵接，从而更可靠地控制转子组件40的运动范围。
在本实施例中，第一止挡凸起211、第二止挡凸起221和第三止挡凸起41均为塑料件。由于为塑料件，因而止挡限位时撞击的声音较小。另外，三个止挡凸起都是在模具中注塑成型的，模具的精度高，其尺寸一致性好，当电子膨胀阀复位操作时，不存在回弹的情况，初始位置一致性好，提升了电子膨胀阀流量精度。
优选地，由于仅转子组件40需要具有磁性，螺母组件20没有磁性需求，因而螺母23整体为纯塑料件，而转子42中在塑料中加入有磁粉，制成磁性塑料件，这样即可实现在满足转子42磁性需求的同时减少撞击声音的效果。嵌件43由于不发生碰撞，因而可以设置成金属件。
如图1和图2所示，电子膨胀阀还包括套管50，套管50与阀座组件10连接，并与阀座组件10形成容纳腔，第一连接口11和第二连接口12均位于容纳腔外，螺母组件20、阀针组件30和转子组件40均位于容纳腔内。套管50在不影响电子膨胀阀正常使用的情况下对电子膨胀阀不外露的结构进行保护，同时通电线圈可以绕设在套管50的外侧，实现对转子42的驱动。
在本实施例中，阀座组件10包括阀座13和套管座14，阀座13具有第一连接口11和第二连接口12，螺母23的大径段22伸入至阀座13内，并与阀座13过盈配合，当将大径段22通过压装等方式装入阀座13内时，连接板24与套管座14抵接即表明安装到位，阀座13作为电子膨胀阀的基础部件提供基础支撑，套管座14设置在阀座13外侧并与阀座13连接，套管50与套管座14连接，套管座14用于套管50的安装，并且在套管座14上还可以设置有线圈盘，用于梳理绕设线圈。
本实施例还提供了一种电子膨胀阀的安装方法，电子膨胀阀为上述的电子膨胀阀，安装方法为：
先将电子膨胀阀的阀座组件10的各部件组装在一起，阀座13、外部连接管以及套管座14焊接在一起作为阀座组件10；并且将电子膨胀阀的阀针组件30的各部件组装在一起，阀针、垫片、弹簧、衬套、弹簧套以及螺杆装配到一起作为阀针组件30；然后将阀针组件30的缩径段31由电子膨胀阀的螺母组件20的大径段22伸入螺母组件20内，并拧入到螺母组件20的小径段21上，再将螺母组件20安装到阀座组件10上，通过激光焊将连接板24与套管座14焊接在一起；将电子膨胀阀的转子组件40安装到螺母组件20外侧，并将转子组件40的第三止挡凸起41的侧面与螺母组件20的第二止挡凸起221抵接并且第三止挡凸起41的另一侧面与螺母23上的定位台阶27抵接，然后对阀针组件30的位置进行调整，调整阀针组件30伸入阀座组件10的距离，将阀针组件30拧到0脉冲位置使电子膨胀阀全关，这样调整完成后，当第三止挡凸起41与第二止挡凸起221抵接时电子膨胀阀即处于全关的状态，然后再将螺杆和嵌件43激光焊焊接在一起；最后将电子膨胀阀的套管50套在转子组件40外侧，并与套管座14激光焊接在一起即可完成电子膨胀阀的组装。
需要说明的是，上述实施例中的多个指的是至少两个。
从以上的描述中，可以看出，本申请上述的实施例实现了如下技术效果：
1、解决了现有技术中的电子膨胀阀运转过程中噪音较大的问题；
2、第三止挡凸起距离中心较近，力臂设置更优，整体强度更高，更加耐用；
3、第三止挡凸起不会对转子组件端部的磁性产生干扰，转子组件能够更好地受到通电线圈的磁力作用，转子组件的正对面积较大，能够满足阀针组件的行程需求；
4、塑料件止挡限位时撞击的声音较小，并且模具的精度高，其尺寸一致性好。
显然，上述所描述的实施例仅仅是本申请一部分的实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都应当属于本申请保护的范围。

Claims (14)

  1. 一种电子膨胀阀，其特征在于，包括：
    阀座组件(10)，所述阀座组件(10)具有与外部管路连通的第一连接口(11)和第二连接口(12)；
    螺母组件(20)，所述螺母组件(20)包括顺次连接的小径段(21)和大径段(22)，所述大径段(22)与所述阀座组件(10)连接，所述小径段(21)具有第一止挡凸起(211)，所述大径段(22)具有第二止挡凸起(221)；
    阀针组件(30)，所述阀针组件(30)贯穿所述螺母组件(20)设置，其下端具有阀针段(33)，上端与所述螺母组件(20)螺纹连接；
    转子组件(40)，所述转子组件(40)通过顶部与所述阀针组件(30)固定连接，并驱动所述阀针组件(30)转动，所述阀针组件(30)沿所述电子膨胀阀的轴向运动，以控制所述第一连接口(11)与所述第二连接口(12)之间的通断状态，所述转子组件(40)具有第三止挡凸起(41)，且所述第三止挡凸起(41)自偏离所述转子组件(40)底部的位置朝内凸出延伸设置，当所述电子膨胀阀全开时，所述第三止挡凸起(41)与所述第一止挡凸起(211)抵接，当所述电子膨胀阀全关时，所述第三止挡凸起(41)与所述第二止挡凸起(221)抵接。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀针组件(30)包括顺次连接的缩径段(31)、扩径段(32)和所述阀针段(33)，所述阀针组件(30)由所述大径段(22)伸入至所述螺母组件(20)内，且所述缩径段(31)位于所述小径段(21)处，所述扩径段(32)位于所述大径段(22)处，所述阀针段(33)位于所述阀座组件(10)内，所述小径段(21)与所述缩径段(31)螺纹连接。
  3. 根据权利要求1所述的电子膨胀阀，其特征在于，所述转子组件(40)包括：
    转子(42)，所述转子(42)呈倒U字形结构，并罩设在所述螺母组件(20)外侧，所述第三止挡凸起(41)位于所述转子(42)内侧，所述阀针组件(30)贯穿所述转子(42)的端面；
    嵌件(43)，所述嵌件(43)设置在所述转子(42)的端面与所述阀针组件(30)之间，所述转子(42)通过所述嵌件(43)带动所述阀针组件(30)转动，所述转子(42)的端面开设有脱模孔(44)，且沿所述转子组件(40)的轴向，所述脱模孔(44)正对所述第三止挡凸起(41)。
  4. 根据权利要求1所述的电子膨胀阀，其特征在于，所述螺母组件(20)包括：
    螺母(23)，所述螺母(23)具有所述大径段(22)和所述小径段(21)；
    连接板(24)，所述连接板(24)设置在所述螺母(23)外侧，并与所述螺母(23)一体注塑成型，所述连接板(24)与所述阀座组件(10)连接。
  5. 根据权利要求4所述的电子膨胀阀，其特征在于，所述第一止挡凸起(211)的长度与所述第二止挡凸起(221)的长度不同。
  6. 根据权利要求5所述的电子膨胀阀，其特征在于，所述第一止挡凸起(211)的端部到所述螺母(23)中心线的距离与所述第二止挡凸起(221)到所述螺母(23)中心线的距离相等。
  7. 根据权利要求4所述的电子膨胀阀，其特征在于，所述大径段(22)的外侧具有多个定位筋(25)，所述定位筋(25)与所述阀座组件(10)的内壁抵接，各所述定位筋(25)沿所述大径段(22)的周向设置。
  8. 根据权利要求7所述的电子膨胀阀，其特征在于，所述大径段(22)未设置有所述定位筋(25)的外壁与所述阀座组件(10)的内壁之间形成缝隙，所述连接板(24)开设有过孔(241)，所述过孔(241)与所述缝隙连通并形成供流体通过的通道。
  9. 根据权利要求4所述的电子膨胀阀，其特征在于，所述螺母(23)还具有平衡孔(26)，所述平衡孔(26)朝所述螺母(23)的轴线开设。
  10. 根据权利要求1所述的电子膨胀阀，其特征在于，所述大径段(22)靠近所述小径段(21)的端面形成有定位台阶(27)，所述第三止挡凸起(41)能够抵接在所述定位台阶(27)上，以控制所述转子组件(40)的运动范围。
  11. 根据权利要求1所述的电子膨胀阀，其特征在于，所述第一止挡凸起(211)、所述第二止挡凸起(221)和所述第三止挡凸起(41)均为塑料件。
  12. 根据权利要求1所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括套管(50)，所述套管(50)与所述阀座组件(10)连接，并与所述阀座组件(10)形成容纳腔，所述第一连接口(11)和所述第二连接口(12)均位于所述容纳腔外，所述螺母组件(20)、所述阀针组件(30)和所述转子组件(40)均位于所述容纳腔内。
  13. 根据权利要求12所述的电子膨胀阀，其特征在于，所述阀座组件(10)包括：
    阀座(13)，所述阀座(13)具有所述第一连接口(11)和所述第二连接口(12)，所述螺母组件(20)的一部分伸入至所述阀座(13)内；
    套管座(14)，所述套管座(14)设置在所述阀座(13)外侧并与所述阀座(13)连接，所述套管(50)与所述套管座(14)连接。
  14. 一种电子膨胀阀的安装方法，其特征在于，所述电子膨胀阀为权利要求1至13中任一项所述的电子膨胀阀，所述安装方法包括：
    将所述电子膨胀阀的阀座组件(10)的各部件组装在一起；
    将所述电子膨胀阀的阀针组件(30)的各部件组装在一起；
    将所述阀针组件(30)的缩径段(31)由所述电子膨胀阀的螺母组件(20)的大径 段(22)伸入所述螺母组件(20)内，并拧入到所述螺母组件(20)的小径段(21)上；
    将所述螺母组件(20)安装到所述阀座组件(10)上；
    将所述电子膨胀阀的转子组件(40)安装到所述螺母组件(20)外侧，并将所述转子组件(40)的第三止挡凸起(41)与所述螺母组件(20)的第二止挡凸起(221)抵接，调整所述阀针组件(30)伸入所述阀座组件(10)的距离，使所述电子膨胀阀全关，将所述阀针组件(30)与所述转子组件(40)连接在一起；
    将所述电子膨胀阀的套管(50)套在所述转子组件(40)外侧，并与所述阀座组件(10)连接在一起。
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