WO2020248759A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2020248759A1
WO2020248759A1 PCT/CN2020/090039 CN2020090039W WO2020248759A1 WO 2020248759 A1 WO2020248759 A1 WO 2020248759A1 CN 2020090039 W CN2020090039 W CN 2020090039W WO 2020248759 A1 WO2020248759 A1 WO 2020248759A1
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WO
WIPO (PCT)
Prior art keywords
rod
valve
shaped member
electronic expansion
expansion valve
Prior art date
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PCT/CN2020/090039
Other languages
English (en)
French (fr)
Inventor
詹少军
冯贵刚
何秋波
Original Assignee
浙江盾安人工环境股份有限公司
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 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Priority to JP2021549657A priority Critical patent/JP7185785B2/ja
Priority to EP20823633.1A priority patent/EP3957882A4/en
Priority to KR1020217037396A priority patent/KR102596287B1/ko
Priority to US17/610,165 priority patent/US20220228664A1/en
Publication of WO2020248759A1 publication Critical patent/WO2020248759A1/zh

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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
    • 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
    • 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
    • F16K1/482—Attaching valve members to screw-spindles with a collar on the spindle or a groove in the spindle, by which a fixing element is supported, the spindle reaching into the valve member
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • 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
    • F25B41/35—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators by rotary motors, e.g. by stepping motors
    • 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 specifically to an electronic expansion valve.
  • the electronic expansion valve has a rod-shaped member for driving the movement of the valve head and a valve sleeve for restricting and matching the valve head and the rod-shaped member.
  • the end of the rod-shaped member needs to be fixedly connected with the valve sleeve.
  • it is not easy to locate the rod-shaped member in the circumferential direction which easily causes poor connection between the rod-shaped member and the valve sleeve and affects the product qualification rate.
  • This application provides an electronic expansion valve to solve the problem of low qualification rate of electronic expansion valves in the prior art.
  • an electronic expansion valve including: a valve body, the valve body has a valve port; the valve head is movably arranged in the valve body, and the valve head is used to block the valve port; a rod-shaped member, The rod-shaped member has opposite first and second ends. The first end penetrates the cavity of the valve head, and the second end has a positioning structure. The positioning structure is used to position the rod-shaped member in the circumferential direction.
  • the positioning structure is Positioning plane, the positioning plane is parallel to the axis of the rod-shaped member; the valve sleeve is arranged in the cavity of the valve head, the first end of the rod-shaped member is fixedly connected with the valve sleeve, and the valve sleeve and the valve head are in position-limiting cooperation; the elastic member, It is arranged in the cavity of the valve head, one end of the elastic piece is matched with the valve head, and the other end of the elastic piece can be compressed by the rod-shaped piece.
  • first channel between the rod-shaped member and the valve sleeve, and the first channel and the cavity of the valve head jointly form a balance channel penetrating the valve head.
  • valve head includes a cylinder and a limit ring arranged on the inner wall of the cylinder.
  • One end of the elastic member abuts on one side of the limit ring, and the valve sleeve is in a limit fit with the other side of the limit ring.
  • the rod-shaped member includes a first rod section, a second rod section, and a third rod section that are connected in sequence, the second end is located at the third rod section, the first end is located at the first rod section, and the transverse direction of the first rod section is The cross-sectional area is smaller than the cross-sectional area of the second rod section.
  • the first rod section penetrates the limit ring and the valve sleeve. There is a first passage between the inner wall of the valve sleeve and the first rod section. There is a second passage between one rod section.
  • the radial cross section of the first rod segment is arcuate.
  • the side wall of the rod-shaped member has a first limit step, and the end surface of the valve sleeve abuts the first limit step.
  • the side wall of the rod-shaped member has a second limiting step
  • the electronic expansion valve further includes: a gasket sleeved on the rod-shaped member, the gasket abuts against the second limiting step, and the other end of the elastic member Abut the gasket.
  • the electronic expansion valve further includes: a guide sleeve arranged in the valve body, the valve head passing through the guide sleeve; and a sealing element, the sealing element being arranged between the valve head and the guide sleeve.
  • the electronic expansion valve further includes a rotor assembly, which is drivingly connected with the rod-shaped member.
  • the rod-shaped member has an external thread
  • the electronic expansion valve further includes a nut assembly, the nut assembly has an internal thread, and the external thread is matched with the internal thread.
  • a positioning structure is provided at the second end of the rod-shaped member, so that when the rod-shaped member and the valve sleeve are connected, the circumferential direction of the rod-shaped member can be positioned by the positioning structure, so that the rod-shaped member can be positioned at the required position Realize the precise connection of the rod-shaped member and the valve sleeve, thereby improving the connection quality of the rod-shaped member and the valve sleeve, thereby increasing the qualification rate of the electronic expansion valve.
  • Figure 1 shows a cross-sectional view of an electronic expansion valve provided by an embodiment of the present application
  • Figure 2 shows a perspective view of the electronic expansion valve in Figure 1;
  • Figure 3 shows an assembly diagram of the rod-shaped member and some parts in Figure 1;
  • Fig. 4 shows a schematic structural diagram of the rod-shaped member in Fig. 1.
  • Valve body 20. Valve head; 21. Cylinder body; 22. Limit ring; 30. Rod-shaped member; 31. Positioning structure; 32. First rod section; 33. Second rod section; 34. Third Rod section; 41, valve sleeve; 42, elastic member; 43, gasket; 51, first channel; 52, second channel; 61, guide sleeve; 62, seal; 70, rotor assembly; 80, nut assembly.
  • the embodiments of the present application provide an electronic expansion valve, including: a valve body 10 having a valve port; a valve head 20 movably arranged in the valve body 10, the valve The head 20 is used to seal the valve port; the rod-shaped member 30 has a first end and a second end opposite to each other. The first end passes through the cavity of the valve head 20, and the second end has a positioning structure 31, The positioning structure 31 is used to position the rod 30 in the circumferential direction.
  • the positioning structure 31 is a positioning plane which is parallel to the axis of the rod 30; the valve sleeve 41 is arranged in the cavity of the valve head 20 and is rod-shaped.
  • the first end of the member 30 is fixedly connected with the valve sleeve 41, and the valve sleeve 41 is in position-limiting cooperation with the valve head 20; the elastic member 42 is arranged in the cavity of the valve head 20, and one end of the elastic member 42 is matched with the valve head 20. The other end of 42 can be compressed by the rod 30.
  • a positioning structure 31 is provided at the second end of the rod-shaped member 30, so that when the rod-shaped member 30 and the valve sleeve 41 are connected, the circumferential direction of the rod-shaped member 30 can be positioned by the positioning structure 31 Therefore, the precise connection of the rod 30 and the valve sleeve 41 can be realized at the required position, thereby improving the connection quality of the rod 30 and the valve sleeve 41, thereby increasing the qualification rate of the electronic expansion valve.
  • the first end of the rod 30 can be connected to the valve sleeve 41 by welding.
  • first passage 51 between the rod 30 and the valve sleeve 41, and the first passage 51 and the cavity of the valve head 20 together form a balance passage through the valve head 20.
  • the balance passage through the valve head 20 formed by the first passage 51 and the cavity of the valve head 20 can make the areas at the two ends of the valve head 20 maintain pressure balance.
  • the fluid pressures in the areas at both ends of the valve head 20 can be made consistent, so that when the valve head 20 blocks the valve port, it can avoid that the pressure difference between the two sides of the valve head 20 causes a tight seal.
  • it is convenient to open the valve port.
  • the positioning structure 31 is a positioning plane, and the positioning plane is parallel to the axis of the rod 30. Setting the positioning structure 31 as a positioning plane not only facilitates processing, but also facilitates positioning of the rod 30.
  • the positioning structure 31 can be processed by cutting a part of the material at the second end of the rod 30. During production, the positioning can be achieved by matching the tooling or fixture with the positioning plane. Multiple positioning planes can be set.
  • the positioning structure 31 may also be configured as a spline, groove, hole, or the like.
  • the valve head 20 includes a cylinder 21 and a limit ring 22 provided on the inner wall of the cylinder 21.
  • One end of the elastic member 42 abuts on one side of the limit ring 22, and the valve sleeve 41 is in contact with the limit ring 22.
  • the other side of the ring 22 is in position-limiting cooperation, a second channel 52 is provided between the limiting ring 22 and the rod 30, and the first channel 51 is connected to the second channel 52.
  • a second passage 52 is provided between the stop ring 22 and the rod 30, and the second passage 52 is in communication with the first passage 51, so that the pressure balance of the area at both ends of the valve head 20 can be maintained.
  • the second passage 52 belongs to a part of the cavity of the valve head 20.
  • the rod-shaped member 30 includes a first rod section 32, a second rod section 33, and a third rod section 34 that are sequentially connected.
  • the second end is located at the third rod section 34
  • the first end is located at the first rod.
  • Section 32, the cross-sectional area of the first rod section 32 is smaller than the cross-sectional area of the second rod section 33, the first rod section 32 penetrates the limit ring 22 and the valve sleeve 41, the inner wall of the valve sleeve 41 and the first rod
  • the radial cross section of the first rod segment 32 is arcuate.
  • an integrally formed rod can be used as the rod-shaped member 30, and a part of the rod-shaped member 30 is cut off in the axial direction to form the first rod section 32, which is convenient for processing and low manufacturing cost.
  • the side wall of the rod 30 has a first limiting step, and the end surface of the valve sleeve 41 abuts the first limiting step.
  • the valve sleeve 41 and the rod 30 can be limited in the axial direction.
  • the side wall of the rod-shaped member 30 has a second limit step
  • the electronic expansion valve further includes: a gasket 43 sleeved on the rod-shaped member 30, the gasket 43 and the second limit step Then, the other end of the elastic member 42 abuts against the gasket 43.
  • the axial direction of the washer 43 can be limited by the second limiting step.
  • the spacer 43 can limit the axial position of the elastic member 42 and reduce the wear of the rod 30.
  • the electronic expansion valve further includes: a guide sleeve 61 arranged in the valve body 10, the valve head 20 is inserted in the guide sleeve 61; a sealing member 62, the sealing member 62 is arranged on the valve head 20 and the guide sleeve 61 between.
  • the valve head 20 can be guided by the guide sleeve 61.
  • the seal 62 can improve the sealing performance and avoid internal leakage.
  • the inner wall of the guide sleeve 61 has an annular groove, and an annular seal 62 is provided in the annular groove.
  • the outer wall of the valve head 20 can be sealed by the annular seal 62 to ensure the sealing performance of the electronic expansion valve.
  • the electronic expansion valve further includes a rotor assembly 70 that is drivingly connected to the rod 30.
  • the rod 30 can be driven to move by the rotor assembly 70.
  • the rotor assembly 70 is welded to the second end of the rod 30.
  • the rod 30 has an external thread
  • the electronic expansion valve further includes: a nut assembly 80 having an internal thread, and the external thread is matched with the internal thread.
  • a positioning structure 31 is provided at the second end of the rod-shaped member 30, so that when the rod-shaped member 30 and the valve sleeve 41 are connected, the circumferential direction of the rod-shaped member 30 can be positioned by the positioning structure 31. Therefore, the rod-shaped member 30 and the valve sleeve 41 can be accurately connected at the required position, thereby improving the connection quality of the rod-shaped member 30 and the valve sleeve 41, thereby increasing the qualification rate of the electronic expansion valve. Moreover, the balance passage through the valve head 20 formed by the first passage 51 and the cavity of the valve head 20 can make the areas at both ends of the valve head 20 maintain pressure balance.
  • the fluid pressures in the areas at both ends of the valve head 20 can be made consistent, so that when the valve head 20 blocks the valve port, it can avoid that the pressure difference between the two sides of the valve head 20 causes a tight seal. Moreover, it is convenient to open the valve port.
  • the first end of the rod 30 can be connected to the valve sleeve 41 by welding.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Lift Valve (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

一种电子膨胀阀，包括：阀体（10），阀体（10）具有阀口；阀头（20），可移动地设置在阀体（10）内，阀头（20）用于封堵阀口；杆状件（30），杆状件（30）具有相对的第一端和第二端，第一端穿设在阀头（20）的腔体内，第二端具有定位结构（31），定位结构（31）用于对杆状件（30）的周向进行定位，定位结构（31）为定位平面，定位平面与杆状件（30）的轴线平行；阀套（41），设置在阀头（20）的腔体中，杆状件（30）的第一端与阀套（41）固定连接，阀套（41）与阀头（20）限位配合；弹性件（42），设置在阀头（20）的腔体内，弹性件（42）的一端与阀头（20）配合，弹性件（42）的另一端能够被杆状件（30）压缩。

Description

电子膨胀阀
本申请要求于2019年6月14日提交至中国国家知识产权局、申请号为201920903057.0、发明创造名称为“电子膨胀阀”的专利申请的优先权。
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。
背景技术
电子膨胀阀中具有用于驱动阀头移动的杆状件以及将阀头和杆状件限位配合的阀套，在生产中需要将杆状件的端部与阀套固定连接。在操作时，杆状件的圆周方向不易定位，容易造成杆状件与阀套的连接不良，影响产品合格率。
发明内容
本申请提供了一种电子膨胀阀，以解决现有技术中的电子膨胀阀合格率低的问题。
为了解决上述问题，本申请提供了一种电子膨胀阀，包括：阀体，阀体具有阀口；阀头，可移动地设置在阀体内，阀头用于封堵阀口；杆状件，杆状件具有相对的第一端和第二端，第一端穿设在阀头的腔体内，第二端具有定位结构，定位结构用于对杆状件的周向进行定位，定位结构为定位平面，定位平面与杆状件的轴线平行；阀套，设置在阀头的腔体中，杆状件的第一端与阀套固定连接，阀套与阀头限位配合；弹性件，设置在阀头的腔体内，弹性件的一端与阀头配合，弹性件的另一端能够被杆状件压缩。
进一步地，杆状件和阀套之间具有第一通道，第一通道和阀头的腔体共同形成贯穿阀头的平衡通道。
进一步地，阀头包括筒体和设置在筒体的内壁上的限位环，弹性件的一端与限位环的一侧抵接，阀套与限位环的另一侧限位配合，限位环和杆状件之间具有第二通道，第一通道与第二通道连通。
进一步地，杆状件包括顺次连接的第一杆段、第二杆段和第三杆段，第二端位于第三杆段，第一端位于第一杆段，第一杆段的横截面积小于第二杆段的横截面积，第一杆段穿设在限位环和阀套中，阀套的内壁与第一杆段之间具有第一通道，限位环的内壁与第一杆段之间具有第二通道。
进一步地，第一杆段的径向截面为弓形。
进一步地，杆状件的侧壁上具有第一限位台阶，阀套的端面与第一限位台阶抵接。
进一步地，杆状件的侧壁上具有第二限位台阶，电子膨胀阀还包括：垫片，套设在杆状件上，垫片与第二限位台阶抵接，弹性件的另一端与垫片抵接。
进一步地，电子膨胀阀还包括：导向套，设置在阀体中，阀头穿设在导向套中；密封件，密封件设置在阀头和导向套之间。
进一步地，电子膨胀阀还包括：转子组件，转子组件与杆状件驱动连接。
进一步地，杆状件具有外螺纹，电子膨胀阀还包括：螺母组件，螺母组件具有内螺纹，外螺纹与内螺纹配合。
应用本申请的技术方案，在杆状件的第二端设置定位结构，这样在连接杆状件和阀套时，可通过定位结构对杆状件的周向进行定位，从而可在需要的位置实现杆状件和阀套的精确连接，从而提高杆状件与阀套的连接质量，从而提高电子膨胀阀的合格率。
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示出了本申请的实施例提供的电子膨胀阀的剖视图；
图2示出了图1中的电子膨胀阀的立体图；
图3示出了图1中的杆状件与一部分零件的装配图；
图4示出了图1中的杆状件的结构示意图。
其中，上述附图包括以下附图标记：
10、阀体；20、阀头；21、筒体；22、限位环；30、杆状件；31、定位结构；32、第一杆段；33、第二杆段；34、第三杆段；41、阀套；42、弹性件；43、垫片；51、第一通道；52、第二通道；61、导向套；62、密封件；70、转子组件；80、螺母组件。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本申请及其应用或使用的任何限制。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
如图1至图4所示，本申请的实施例提供了一种电子膨胀阀，包括：阀体10，阀体10具有阀口；阀头20，可移动地设置在阀体10内，阀头20用于封堵阀口；杆状件30，杆状件30具有相对的第一端和第二端，第一端穿设在阀头20的腔体内，第二端具有定位结构31，定位 结构31用于对杆状件30的周向进行定位，定位结构31为定位平面，定位平面与杆状件30的轴线平行；阀套41，设置在阀头20的腔体中，杆状件30的第一端与阀套41固定连接，阀套41与阀头20限位配合；弹性件42，设置在阀头20的腔体内，弹性件42的一端与阀头20配合，弹性件42的另一端能够被杆状件30压缩。
应用本实施例的技术方案，在杆状件30的第二端设置定位结构31，这样在连接杆状件30和阀套41时，可通过定位结构31对杆状件30的周向进行定位，从而可在需要的位置实现杆状件30和阀套41的精确连接，从而提高杆状件30与阀套41的连接质量，进而提高电子膨胀阀的合格率。在本实施例中，杆状件30的第一端可通过焊接的方式与阀套41连接。
而且，杆状件30和阀套41之间具有第一通道51，第一通道51和阀头20的腔体共同形成贯穿阀头20的平衡通道。通过第一通道51和阀头20的腔体组成的贯穿阀头20的平衡通道，可使得阀头20的两端的区域保持压力平衡。通过设置平衡通道，可使得阀头20的两端的区域内的流体压力一致，这样当阀头20将阀口封堵之后可避免由于阀头20两侧有压力差而造成封堵不严。而且，这样便于打开阀口。
在本实施例中，定位结构31为定位平面，定位平面与杆状件30的轴线平行。将定位结构31设置为定位平面，既便于加工，又便于对杆状件30进行定位。定位结构31可通过在杆状件30的第二端切除一部分材料的方式加工而成。在生产时，可通过工装或夹具与定位平面配合，从而实现定位。定位平面可以设置成多个。
在未图示出的方案中，定位结构31还可以设置为花键、凹槽、孔等结构。
在本实施例中，阀头20包括筒体21和设置在筒体21的内壁上的限位环22，弹性件42的一端与限位环22的一侧抵接，阀套41与限位环22的另一侧限位配合，限位环22和杆状件30之间具有第二通道52，第一通道51与第二通道52连通。通过设置限位环22，可将弹性件42与限位环22抵接，以使弹性件42对阀头20施加弹力。在限位环22和杆状件30之间设置有第二通道52，第二通道52与第一通道51连通，这样可使得阀头20的两端的区域保持压力平衡。第二通道52属于阀头20的腔体的一部分。
如图4所示，杆状件30包括顺次连接的第一杆段32、第二杆段33和第三杆段34，第二端位于第三杆段34，第一端位于第一杆段32，第一杆段32的横截面积小于第二杆段33的横截面积，第一杆段32穿设在限位环22和阀套41中，阀套41的内壁与第一杆段32之间具有第一通道51，限位环22的内壁与第一杆段32之间具有第二通道52。通过上述设置，便于形成第一通道51和第二通道52。采用此种设置方式，便于加工出平衡通道。
具体地，在本实施例中，第一杆段32的径向截面为弓形。在加工时，可采用一根一体成型的杆作为杆状件30，从杆状件30的一端沿轴向切削掉一部分制作出第一杆段32，这样便于加工，制造成本低。
在本实施例中，杆状件30的侧壁上具有第一限位台阶，阀套41的端面与第一限位台阶抵接。通过设置第一限位台阶，可对阀套41和杆状件30在轴向进行限位。
在本实施例中，杆状件30的侧壁上具有第二限位台阶，电子膨胀阀还包括：垫片43，套设在杆状件30上，垫片43与第二限位台阶抵接，弹性件42的另一端与垫片43抵接。通过第二限位台阶可对垫片43的轴向进行限位。通过垫片43可对弹性件42的轴向进行限位，并且可以减少杆状件30的磨损。
在本实施例中，电子膨胀阀还包括：导向套61，设置在阀体10中，阀头20穿设在导向套61中；密封件62，密封件62设置在阀头20和导向套61之间。
通过导向套61可对阀头20进行导向。通过密封件62可提高密封性，避免内泄。具体地，导向套61的内壁上具有环形凹槽，环形凹槽内具有环形密封件62，通过环形密封件62可对阀头20的外壁进行密封，以保证电子膨胀阀的密封性。
在本实施例中，电子膨胀阀还包括：转子组件70，转子组件70与杆状件30驱动连接。通过转子组件70可带动杆状件30移动。转子组件70与杆状件30的第二端焊接。
在本实施例中，杆状件30具有外螺纹，电子膨胀阀还包括：螺母组件80，螺母组件80具有内螺纹，外螺纹与内螺纹配合。通过转子组件70、螺母组件80以及杆状件30的配合，可实现杆状件30的转动以及上下移动。
通过本申请的技术方案，在杆状件30的第二端设置定位结构31，这样在连接杆状件30和阀套41时，可通过定位结构31对杆状件30的周向进行定位，从而可在需要的位置实现杆状件30和阀套41的精确连接，从而提高杆状件30与阀套41的连接质量，进而提高电子膨胀阀的合格率。而且，通过第一通道51和阀头20的腔体组成的贯穿阀头20的平衡通道，可使得阀头20的两端的区域保持压力平衡。通过设置平衡通道，可使得阀头20的两端的区域内的流体压力一致，这样当阀头20将阀口封堵之后可避免由于阀头20两侧有压力差而造成封堵不严。而且，这样便于打开阀口。在本实施例中，杆状件30的第一端可通过焊接的方式与阀套41连接。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (10)

  1. 一种电子膨胀阀，其特征在于，包括：
    阀体(10)，所述阀体(10)具有阀口；
    阀头(20)，可移动地设置在所述阀体(10)内，所述阀头(20)用于封堵所述阀口；
    杆状件(30)，所述杆状件(30)具有相对的第一端和第二端，所述第一端穿设在所述阀头(20)的腔体内，所述第二端具有定位结构(31)，所述定位结构(31)用于对所述杆状件(30)的周向进行定位，所述定位结构(31)为定位平面，所述定位平面与所述杆状件(30)的轴线平行；
    阀套(41)，设置在所述阀头(20)的腔体中，所述杆状件(30)的第一端与所述阀套(41)固定连接，所述阀套(41)与所述阀头(20)限位配合；
    弹性件(42)，设置在所述阀头(20)的腔体内，所述弹性件(42)的一端与所述阀头(20)配合，所述弹性件(42)的另一端能够被所述杆状件(30)压缩。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述杆状件(30)和所述阀套(41)之间具有第一通道(51)，所述第一通道(51)和所述阀头(20)的腔体共同形成贯穿所述阀头(20)的平衡通道。
  3. 根据权利要求2所述的电子膨胀阀，其特征在于，所述阀头(20)包括筒体(21)和设置在所述筒体(21)的内壁上的限位环(22)，所述弹性件(42)的一端与所述限位环(22)的一侧抵接，所述阀套(41)与所述限位环(22)的另一侧限位配合，所述限位环(22)和所述杆状件(30)之间具有第二通道(52)，所述第一通道(51)与所述第二通道(52)连通。
  4. 根据权利要求3所述的电子膨胀阀，其特征在于，所述杆状件(30)包括顺次连接的第一杆段(32)、第二杆段(33)和第三杆段(34)，所述第二端位于所述第三杆段(34)，所述第一端位于所述第一杆段(32)，所述第一杆段(32)的横截面积小于所述第二杆段(33)的横截面积，所述第一杆段(32)穿设在所述限位环(22)和所述阀套(41)中，所述阀套(41)的内壁与所述第一杆段(32)之间具有所述第一通道(51)，所述限位环(22)的内壁与所述第一杆段(32)之间具有所述第二通道(52)。
  5. 根据权利要求4所述的电子膨胀阀，其特征在于，所述第一杆段(32)的径向截面为弓形。
  6. 根据权利要求1所述的电子膨胀阀，其特征在于，所述杆状件(30)的侧壁上具有第一限位台阶，所述阀套(41)的端面与所述第一限位台阶抵接。
  7. 根据权利要求1所述的电子膨胀阀，其特征在于，所述杆状件(30)的侧壁上具有第二限位台阶，所述电子膨胀阀还包括：
    垫片(43)，套设在所述杆状件(30)上，所述垫片(43)与所述第二限位台阶抵接， 所述弹性件(42)的另一端与所述垫片(43)抵接。
  8. 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：
    导向套(61)，设置在所述阀体(10)中，所述阀头(20)穿设在所述导向套(61)中；
    密封件(62)，所述密封件(62)设置在所述阀头(20)和所述导向套(61)之间。
  9. 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：
    转子组件(70)，所述转子组件(70)与所述杆状件(30)驱动连接。
  10. 根据权利要求1所述的电子膨胀阀，其特征在于，所述杆状件(30)具有外螺纹，所述电子膨胀阀还包括：
    螺母组件(80)，所述螺母组件(80)具有内螺纹，所述外螺纹与所述内螺纹配合。
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