WO2022199230A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2022199230A1
WO2022199230A1 PCT/CN2022/072128 CN2022072128W WO2022199230A1 WO 2022199230 A1 WO2022199230 A1 WO 2022199230A1 CN 2022072128 W CN2022072128 W CN 2022072128W WO 2022199230 A1 WO2022199230 A1 WO 2022199230A1
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WO
WIPO (PCT)
Prior art keywords
valve
seat
electronic expansion
soft
sealing structure
Prior art date
Application number
PCT/CN2022/072128
Other languages
English (en)
French (fr)
Inventor
邓岳忠
王傅钢
Original Assignee
浙江盾安人工环境股份有限公司
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Publication date
Priority claimed from CN202110310848.4A external-priority patent/CN115111377A/zh
Priority claimed from CN202120593230.9U external-priority patent/CN219345506U/zh
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
Publication of WO2022199230A1 publication Critical patent/WO2022199230A1/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
    • F16K1/02—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
    • 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
    • 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
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/46—Attachment of sealing rings
    • 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

  • the present application relates to the technical field of electronic expansion valves, and in particular, to an electronic expansion valve.
  • the electronic expansion valve in the prior art generally includes a valve seat and a valve needle.
  • the array moves in the valve cavity of the valve seat, and the valve needle can move to a position that avoids the valve port and The position where the valve port is blocked to realize the on-off of the flow path in the valve seat.
  • the main purpose of the present application is to provide an electronic expansion valve to solve the technical problem of poor sealing effect of the electronic expansion valve in the prior art.
  • an electronic expansion valve including a drive assembly, a valve needle assembly and a valve seat assembly
  • the valve seat assembly includes a valve seat, a valve core seat and a soft sealing structure
  • the valve needle assembly includes a valve needle, a valve
  • the needle is movably arranged in the valve seat under the driving of the driving component;
  • the valve core seat is arranged at the opening of the valve seat and forms a first valve port, when the valve needle closes the first valve port, the valve needle and the valve core seat abut against the valve seat.
  • the soft seal structure is located in the valve seat, the soft seal structure is located above the valve core seat and forms the second valve port, when the valve needle closes the second valve port, the soft seal structure and the valve needle abutting place is formed Soft seal.
  • the soft sealing structure is made of rubber.
  • the soft sealing structure is an annular structure, and when the valve needle closes the second valve port, at least part of the valve needle penetrates the inner ring of the soft sealing structure.
  • the soft sealing structure is provided with a sealing end face
  • the valve needle includes a sealing mating face which is matched with the sealing end face, and the sealing end face abuts against the sealing mating face to form a soft seal; wherein the sealing end face is a plane structure, and the sealing mating face It is a plane structure or a cone structure.
  • valve seat is provided with a first positioning step
  • soft sealing structure is provided with a second positioning step adapted to the valve seat, so as to perform the soft sealing structure under the cooperation of the first positioning step and the second positioning step. position.
  • valve needle is provided with an arc-shaped concave portion
  • valve core seat is provided with an arc-shaped convex portion adapted to the arc-shaped concave portion, and the arc-shaped convex portion abuts against the arc-shaped concave portion to form a hard seal.
  • a radially extending through channel is arranged in the valve seat, and both the hard seal and the soft seal are located on the side of the through channel close to the valve core seat.
  • valve core seat has a connection end and an outlet end arranged oppositely, the connection end is arranged in the valve seat, and the soft sealing structure is supported on the end surface of the connection end.
  • a positioning flange is also provided between the connecting end and the outlet end, and the positioning flange is used for abutting and positioning with the end of the valve seat.
  • the electronic expansion valve further includes a mounting base, the valve seat assembly is mounted on the mounting base and is detachably connected to the mounting base, and the electronic expansion valve is used in automobiles or household appliances.
  • a hard seal is formed between the valve needle and the valve core seat, and a soft seal is formed between the valve needle and the soft seal structure, and the soft seal is located above the hard seal.
  • the sealing effect of the soft seal is better at the initial stage of use of the electronic expansion valve; as the use time increases, the wear of the soft seal structure increases, and the running-in of the valve needle and the valve core seat is better. , that is, the fitting effect of the valve needle and the valve core seat is better.
  • the hard seal can effectively play a sealing role, thereby ensuring good sealing performance of the electronic expansion valve during the entire use process. Therefore, the technical problem of poor sealing effect of the electronic expansion valve in the prior art can be solved by the technical solution provided in the present application.
  • FIG. 1 shows a schematic structural diagram of an electronic expansion valve with a surface seal structure provided according to an embodiment of the present application
  • FIG. 2 shows a schematic structural diagram of an electronic expansion valve with a soft seal in a wire seal structure provided according to an embodiment of the present application.
  • valve seat 10, valve seat; 11, first positioning step; 12, through channel; 20, valve needle; 21, arc recess; 30, valve core seat; 31, connecting end; 32, outlet end; 33, positioning flange; 40.
  • Soft sealing structure 51. Hard sealing; 52. Soft sealing.
  • an embodiment of the present application provides an electronic expansion valve.
  • the electronic expansion valve includes a drive assembly, a valve needle assembly and a valve seat assembly.
  • the valve seat assembly includes a valve seat 10 and a valve core seat 30 .
  • the valve needle assembly includes a valve needle 20 , and the valve needle 20 is movably disposed in the valve seat 10 under the driving of the driving assembly.
  • the valve core seat 30 is disposed at the opening of the valve seat 10 and forms a first valve port. When the valve needle 20 closes the first valve port, the valve needle 20 abuts against the valve core seat 30 to form a hard seal 51 .
  • the soft sealing structure 40 is located in the valve seat 10, the soft sealing structure 40 is located above the valve core seat 30 and forms the second valve port, when the valve needle 20 closes the second valve port, the soft sealing structure and the valve needle 20 are formed at the abutment point Soft seal 52.
  • a hard seal 51 is formed between the valve needle 20 and the valve core seat 30, and a soft seal 52 is formed between the valve needle 20 and the soft seal structure 40, and the soft seal 52 is located in the hard seal 51 above.
  • the valve needle 20 also closes the second valve port when the valve needle 20 closes the first valve port, so that the valve needle 20 forms a double sealing structure with the valve core seat 30 and the soft sealing structure 40 respectively.
  • the sealing effect of the soft seal 52 is better at the initial stage of use of the electronic expansion valve; as the use time increases, the wear of the soft seal structure 40 increases, and at the same time the valve needle 20 and the valve core seat 30 The running-in of the valve is better (the valve needle 20 and the valve core seat 30 have better fitting effect), at this time, the hard seal 51 can effectively play a sealing role, thereby ensuring good sealing performance of the electronic expansion valve throughout the use process. Therefore, with the electronic expansion valve provided in this embodiment, the technical problem of poor sealing effect of the electronic expansion valve in the prior art can be solved.
  • the soft sealing structure 40 in this embodiment is made of a flexible material.
  • the soft sealing structure 40 is made of rubber to effectively ensure the sealing effect.
  • the soft sealing structure 40 is an annular structure.
  • the valve needle 20 closes the second valve port, at least part of the valve needle 20 penetrates the inner ring of the soft sealing structure 40 , and the outer ring of the soft sealing structure 40 Fitting and positioning with the inner wall of the valve seat 10 .
  • the use of the soft sealing structure 40 of the annular structure can facilitate the formation of a soft seal 52 with a better sealing effect, so as to improve the sealing effect.
  • the soft sealing structure 40 in this embodiment is provided with a sealing end surface
  • the valve needle 20 includes a sealing mating surface that matches the sealing end surface
  • the sealing end surface and the sealing mating surface are attached to form a soft seal 52 to improve the softness Sealing effect of seal 52.
  • the sealing end surface is a plane structure
  • the sealing mating surface is a plane structure or a conical surface structure.
  • the sealing end face and the sealing mating face are both planar structures, the sealing end face and the sealing mating face are fitted and sealed so that the soft seal 52 is a face sealing structure.
  • the soft sealing structure 40 It will be worn, but at the same time of wear, the hard seal 51 is also running in, so that the sealing effect is getting better and better.
  • the sealing end face is a plane structure and the sealing mating surface is a conical surface structure
  • the sealing end face and the sealing mating face are abutted and sealed to make the soft seal 52 a line sealing structure.
  • the sealing structure 40 will be worn, and the worn sealing end surface of the soft sealing structure 40 cooperates with the sealing mating surface so that the soft seal 52 changes from a line sealing structure to a surface sealing structure. But at the same time of wear, the hard seal 51 is also running in, so that the sealing effect is getting better and better.
  • the valve seat 10 is provided with a first positioning step 11
  • the soft sealing structure 40 is provided with a second positioning step matching the valve seat 10 , so that the first positioning step 11 and the second positioning step are provided on the soft sealing structure 40 .
  • the soft sealing structure 40 is positioned under the cooperation of the . With such a structural arrangement, the installation stability of the soft sealing structure 40 can be improved.
  • the second positioning step is located on the outer ring of the soft sealing structure 40 .
  • the valve needle 20 is provided with an arc-shaped concave portion 21
  • the valve core seat 30 is provided with an arc-shaped convex portion adapted to the arc-shaped concave portion 21 , and the arc-shaped convex portion abuts against the arc-shaped concave portion 21 . connected to form a hard seal 51 .
  • the contact area between the arc-shaped concave portion 21 and the arc-shaped convex portion can be increased, so as to improve the sealing effect of the hard seal structure.
  • a radially extending through channel 12 is provided in the valve seat 10 , and both the hard seal 51 and the soft seal 52 are located on the side of the through channel 12 close to the valve core seat 30 .
  • such a structure arrangement can facilitate and effectively separate and seal the liquid in the through channel 12 from the channel in the valve core seat 30 or enable the liquid in the through channel 12 to communicate with the channel in the valve core seat 30 .
  • the valve core seat 30 in this embodiment has a connecting end 31 and an outlet end 32 arranged oppositely.
  • the compactness of the arrangement of the soft sealing structure 40 can be easily improved, and the compactness of the internal structure of the valve seat 10 is optimized.
  • the sealing end surface of the soft sealing structure 40 in this embodiment is set on the end surface of the connecting end 31 , and the end surface of the connecting end 31 is the sealing end surface.
  • a positioning step 11 performs positioning and matching, and the above-mentioned assembly structure can further improve the setting stability of the internal structure, and improve the compactness and rationality of the structure layout.
  • a positioning flange 33 is further provided between the connecting end 31 and the outlet end 32 , and the positioning flange 33 is used for abutting and positioning with the end of the valve seat 10 , so as to facilitate the positioning of the valve through the positioning flange 33
  • the core seat 30 is positioned and installed.
  • the drive assembly in this embodiment includes a rotor assembly and a nut assembly.
  • the rotor assembly is sleeved on the outside of the nut assembly and can be rotated under the driving of an external coil.
  • the rotor assembly is fixedly connected with the valve needle assembly and drives the valve needle assembly to rotate.
  • the valve needle assembly is provided with an outer thread
  • the nut assembly is fixedly connected with the valve seat assembly
  • the nut assembly is provided with an inner thread that is threadedly connected with the valve needle outer thread.
  • the valve needle assembly includes a screw rod, a spring sleeve, a spring and a valve needle 20, one end of the spring sleeve is sleeved on the end of the valve needle, the other end is connected with the screw rod, and the spring is installed in the spring sleeve; one end of the screw rod is connected with the spring The sleeve is connected, and the other end is fixedly connected with the rotor assembly.
  • valve seat assembly in this embodiment further includes a support seat, and the valve seat 10 is fixedly connected or integrally formed with the support seat.
  • the electronic expansion valve further includes a mounting base, and the valve seat assembly is mounted on the mounting base and is detachably connected to the mounting base.
  • the electronic expansion valve in this embodiment is mainly used in automobiles or household appliances. From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: reducing the defective rate of internal leakage, and by setting the double-sealing structure of the hard seal and the soft seal, the soft seal of the electronic expansion valve is worn out in the early stage of use. At the same time, the sealing effect of the hard seal will gradually improve during the running-in process.
  • orientations indicated by the orientation words such as “front, rear, top, bottom, left, right", “horizontal, vertical, vertical, horizontal” and “top, bottom” etc.
  • positional relationship is usually based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and these orientations do not indicate or imply the indicated device or element unless otherwise stated. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the application; the orientation words “inside and outside” refer to the inside and outside relative to the contour of each component itself.
  • spatially relative terms such as “on”, “over”, “on the surface”, “above”, etc., may be used herein to describe what is shown in the figures.
  • 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 the device in the figures is turned over, elements described as “above” or “over” other devices or features would then be oriented “below” or “over” the other devices or features under other devices or constructions”.
  • the exemplary term “above” can encompass both an orientation of "above” and “below.”
  • the device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lift Valve (AREA)

Abstract

一种电子膨胀阀，包括驱动组件、阀针组件以及阀座组件，阀座组件包括阀座（10）、阀芯座（30）以及软密封结构（40），阀针组件包括阀针（20），阀针（20）在驱动组件的驱动下可移动地设置在阀座（10）内；阀芯座（30）设置在阀座（10）的开口处并形成第一阀口，在阀针（20）关闭第一阀口时，阀针（20）与阀芯座（30）抵接以形成硬密封（51）；软密封结构（40）位于阀座（10）内，软密封结构（40）位于阀芯座（30）的上方并形成第二阀口，在阀针（20）关闭第二阀口时，软密封结构（40）与阀针（20）抵接处形成软密封（52）。

Description

电子膨胀阀
本申请要求于2021年03月23日提交至中国国家知识产权局、申请号为202110310848.4、发明名称为“电子膨胀阀”的专利申请的优先权，以及于2021年03月23日提交至中国国家知识产权局、申请号为202120593230.9、发明名称为“电子膨胀阀”的专利申请的优先权。
技术领域
本申请涉及电子膨胀阀技术领域，具体而言，涉及一种电子膨胀阀。
背景技术
目前，现有技术中的电子膨胀阀一般包括阀座和阀针，在电子膨胀阀的使用过程中，法阵在阀座的阀腔内运动，阀针能够运动至避让阀口的位置处以及堵塞阀口的位置处，以实现阀座内的流路的通断。
然而，在使用过程中，存在阀针与阀口之间的密封不严的情况，这样会导致内泄漏较多。
发明内容
本申请的主要目的在于提供一种电子膨胀阀，以解决现有技术中的电子膨胀阀的密封效果较差的技术问题。
为了实现上述目的，本申请提供了一种电子膨胀阀，包括驱动组件、阀针组件以及阀座组件，阀座组件包括阀座、阀芯座以及软密封结构，阀针组件包括阀针，阀针在驱动组件的驱动下可移动地设置在阀座内；阀芯座设置在阀座的开口处并形成第一阀口，在阀针关闭第一阀口时，阀针与阀芯座抵接以形成硬密封；软密封结构位于阀座内，软密封结构位于阀芯座的上方并形成第二阀口，在阀针关闭第二阀口时，软密封结构与阀针抵接处形成软密封。进一步地，软密封结构由橡胶制成。
进一步地，软密封结构为环形结构，在阀针关闭第二阀口时，阀针的至少部分穿设在软密封结构的内圈内。
进一步地，软密封结构上设置有密封端面，阀针包括与密封端面相适配的密封配合面，密封端面与密封配合面抵接以形成软密封；其中，密封端面为平面结构，密封配合面为平面结构或锥面结构。
进一步地，阀座内设置有第一定位台阶，软密封结构上设置有与阀座相适配的第二定位台阶，以在第一定位台阶和第二定位台阶的配合下对软密封结构进行定位。
进一步地，阀针上设置有弧形凹部，阀芯座上设置有与弧形凹部相适配的弧形凸部，弧形凸部与弧形凹部抵接以形成硬密封。
进一步地，阀座内设置有径向延伸的贯穿通道，硬密封和软密封均位于贯穿通道的的靠近阀芯座的一侧。
进一步地，阀芯座具有相对设置的连接端和出口端，连接端设置在阀座内，软密封结构支撑在连接端的端面上。
进一步地，连接端和出口端之间还设置有定位凸缘，定位凸缘用于与阀座的端部进行抵接定位。
进一步地，电子膨胀阀还包括安装基体，阀座组件安装于安装基体上并与安装基体可拆卸连接，电子膨胀阀用于汽车上或家用电器上。
应用本申请的技术方案，通过在阀针与阀芯座之间形成硬密封、阀针和软密封结构之间形成软密封，并使软密封位于硬密封的上方。采用这样的双密封结构，在电子膨胀阀的使用的初期，软密封的密封效果较好；随着使用时间的加长，软密封结构受到的磨损增加，同时阀针与阀芯座的磨合更好，即为阀针和阀芯座的贴合效果更好，此时，硬密封能够有效起到密封作用，从而能够保证电子膨胀阀在整个使用过程中的密封性能良好。因此，通过本申请提供的技术方案，能够解决现有技术中的电子膨胀阀的密封效果较差的技术问题。
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示出了根据本申请的实施例提供的软密封为面密封结构的电子膨胀阀的结构示意图；
图2示出了根据本申请的实施例提供的软密封为线密封结构的电子膨胀阀的结构示意图。
其中，上述附图包括以下附图标记：
10、阀座；11、第一定位台阶；12、贯穿通道；20、阀针；21、弧形凹部；30、阀芯座；31、连接端；32、出口端；33、定位凸缘；40、软密封结构；51、硬密封；52、软密封。
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。
如图1和图2所示，本申请的实施例提供了一种电子膨胀阀，该电子膨胀阀包括驱动组件、阀针组件以及阀座组件，阀座组件包括阀座10、阀芯座30以及软密封结构40，阀针组件包括阀针20，阀针20在驱动组件的驱动下可移动地设置在阀座10内。阀芯座30设置在阀座10的开口处并形成第一阀口，在阀针20关闭第一阀口时，阀针20与阀芯座30抵接以形成硬密封51。软密封结构40位于阀座10内，软密封结构40位于阀芯座30的上方并形成第二阀口，在阀针20关闭第二阀口时，软密封结构与阀针20抵接处形成软密封52。
采用本实施例提供的电子膨胀阀，通过在阀针20与阀芯座30之间形成硬密封51、阀针20和软密封结构40之间形成软密封52，并使软密封52位于硬密封51的上方。电子膨胀阀在闭阀时，阀针20在关闭第一阀口时，也会对第二阀口进行关闭，以使阀针20分别和阀芯座30和软密封结构40形成双密封结构。采用这样的双密封结构，在电子膨胀阀的使用的初期，软密封52的密封效果较好；随着使用时间的加长，软密封结构40受到的磨损增加，同时阀针20与阀芯座30的磨合更好(阀针20和阀芯座30的贴合效果更好)，此时，硬密封51能够有效起到密封作用，从而能够保证电子膨胀阀在整个使用过程中的密封性能良好。因此，通过本实施例提供的电子膨胀阀，能够解决现有技术中的电子膨胀阀的密封效果较差的技术问题。
具体的，本实施例中的软密封结构40由柔性材料制成。优选的，软密封结构40由橡胶制成，以有效保证密封效果。
在本实施例中，软密封结构40为环形结构，在阀针20关闭第二阀口时，阀针20的至少部分穿设在软密封结构40的内圈内，软密封结构40的外圈与阀座10的内壁进行贴合定位。采用环形结构的软密封结构40，能够便于形成密封效果更好的软密封52，以提高密封效果。
具体的，本实施例中的软密封结构40上设置有密封端面，阀针20包括与密封端面相适配的密封配合面，密封端面与密封配合面贴合以形成软密封52，以提高软密封52的密封效果。其中，密封端面为平面结构，密封配合面为平面结构或锥面结构。
如图1所示，当密封端面和密封配合面均为平面结构时，密封端面和密封配合面进行贴合密封以使软密封52为面密封结构，随着工作时间的加长，软密封结构40会受到磨损，但磨损的同时，硬密封51也在磨合，使得密封效果越来越好。
如图2所示，当密封端面为平面结构、密封配合面为锥面结构时，密封端面和密封配合面进行抵接密封以使软密封52为线密封结构，随着工作时间的加长，软密封结构40会受到磨损，受到磨损后的软密封结构40的密封端面与密封配合面配合以使软密封52由线密封结构变为面密封结构。但磨损的同时，硬密封51也在磨合，使得密封效果越来越好。
在本实施例中，阀座10内设置有第一定位台阶11，软密封结构40上设置有与阀座10相适配的第二定位台阶，以在第一定位台阶11和第二定位台阶的配合下对软密封结构40进行定位。采用这样的结构设置，能够提高软密封结构40的设置稳定性。具体的，第二定位台阶位于软密封结构40的外圈上。
具体的，本实施例中的阀针20上设置有弧形凹部21，阀芯座30上设置有与弧形凹部21相适配的弧形凸部，弧形凸部与弧形凹部21抵接以形成硬密封51。采用这样的硬密封51结构，能够增加弧形凹部21和弧形凸部的接触面积，以便于提高硬密封结构的密封效果。
在本实施例中，在阀座10内设置有径向延伸的贯穿通道12，硬密封51和软密封52均位于贯穿通道12靠近阀芯座30的一侧。具体的，采用这样的结构设置，能够便于有效使贯穿 通道12内的液体与阀芯座30内的通道隔开并进行密封或使贯穿通道12内的液体能够与阀芯座30内的通道连通。
具体的，本实施例中的阀芯座30具有相对设置的连接端31和出口端32，连接端31设置在阀座10内，软密封结构40支撑在连接端31的端面上。采用这样的结构设置，能够便于提高软密封结构40的设置紧凑性，优化了阀座10的内部结构的紧凑性。具体的，本实施例中的软密封结构40的密封端面设置在连接端31的端面上，连接端31的端面即为密封端面，软密封结构40的第二定位台阶与阀座10内壁的第一定位台阶11进行定位配合，上述装配结构能够进一步提高内部结构的设置稳定性，并提高结构布局的紧凑性和合理性。
在本实施例中，连接端31和出口端32之间还设置有定位凸缘33，定位凸缘33用于与阀座10的端部进行抵接定位，以便于通过定位凸缘33对阀芯座30进行定位安装。
具体的，本实施例中的驱动组件包括转子组件、螺母组件，转子组件套设在螺母组件外侧并且能在外部线圈的驱动下转动，转子组件与阀针组件固定连接并带动阀针组件进行轴向移动及转动，阀针组件设有外螺纹，螺母组件与阀座组件固定连接，螺母组件内设与阀针外螺纹螺纹连接的内螺纹。
在本实施例中，阀针组件包括螺杆、弹簧套、弹簧以及阀针20，弹簧套一端套设在阀针的端部，另一端与螺杆连接，弹簧安装于弹簧套内；螺杆一端与弹簧套连接，另一端与转子组件固定连接。
具体的，本实施例中的阀座组件还包括支撑座，阀座10与支撑座固定连接或一体形成。
在本实施例中，电子膨胀阀还包括安装基体，阀座组件安装于安装基体上并与安装基体可拆卸连接。
具体的，本实施例中的电子膨胀阀主要用于汽车上或家用电器上。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：降低内泄漏不良率，通过设置硬密封和软密封的双密封结构，电子膨胀阀的使用前期软密封受到磨损，同时硬密封在磨合过程中的密封效果将逐步提升。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本申请的范围。同时，应当明白，为了便于描述，附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为授权说明书的一部分。在这里示出和讨论的所有示例中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它示例可以具有不同的值。应注意到：相似的标号和字母在 下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
在本申请的描述中，需要理解的是，方位词如“前、后、上、下、左、右”、“横向、竖向、垂直、水平”和“顶、底”等所指示的方位或位置关系通常是基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，在未作相反说明的情况下，这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作，因此不能理解为对本申请保护范围的限制；方位词“内、外”是指相对于各部件本身的轮廓的内外。
为了便于描述，在这里可以使用空间相对术语，如“在……之上”、“在……上方”、“在……上表面”、“上面的”等，用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是，空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如，如果附图中的器件被倒置，则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而，示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位)，并且对这里所使用的空间相对描述作出相应解释。
此外，需要说明的是，使用“第一”、“第二”等词语来限定零部件，仅仅是为了便于对相应零部件进行区别，如没有另行声明，上述词语并没有特殊含义，因此不能理解为对本申请保护范围的限制。
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，包括驱动组件、阀针组件以及阀座组件，其特征在于，所述阀座组件包括阀座(10)、阀芯座(30)以及软密封结构(40)，所述阀针组件包括阀针(20)，所述阀针(20)在所述驱动组件的驱动下可移动地设置在所述阀座(10)内；所述阀芯座(30)设置在所述阀座(10)的开口处并形成第一阀口，在所述阀针(20)关闭所述第一阀口时，所述阀针(20)与所述阀芯座(30)抵接以形成硬密封(51)；所述软密封结构(40)位于所述阀座(10)内，所述软密封结构(40)位于所述阀芯座(30)的上方并形成第二阀口，在所述阀针(20)关闭所述第二阀口时，所述软密封结构(40)与所述阀针(20)抵接处形成软密封(52)。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述软密封结构(40)由橡胶制成。
  3. 根据权利要求1所述的电子膨胀阀，其特征在于，所述软密封结构(40)为环形结构，在所述阀针(20)关闭所述第二阀口时，所述阀针(20)的至少部分穿设在所述软密封结构(40)的内圈内。
  4. 根据权利要求1所述的电子膨胀阀，其特征在于，所述软密封结构(40)上设置有密封端面，所述阀针(20)包括与所述密封端面相适配的密封配合面，所述密封端面与所述密封配合面抵接以形成所述软密封(52)；
    其中，所述密封端面为平面结构，所述密封配合面为平面结构或锥面结构。
  5. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀座(10)内设置有第一定位台阶(11)，所述软密封结构(40)上设置有与所述阀座(10)相适配的第二定位台阶，以在所述第一定位台阶(11)和所述第二定位台阶的配合下对所述软密封结构(40)进行定位。
  6. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀针(20)上设置有弧形凹部(21)，所述阀芯座(30)上设置有与所述弧形凹部(21)相适配的弧形凸部，所述弧形凸部与所述弧形凹部(21)抵接以形成所述硬密封(51)。
  7. 根据权利要求1所述的电子膨胀阀，其特征在于，所述阀座(10)内设置有径向延伸的贯穿通道(12)，所述硬密封(51)和所述软密封(52)均位于所述贯穿通道(12)的靠近所述阀芯座(30)的一侧。
  8. 根据权利要求7所述的电子膨胀阀，其特征在于，所述阀芯座(30)具有相对设置的连接端(31)和出口端(32)，所述连接端(31)设置在所述阀座(10)内，所述软密封结构(40)支撑在所述连接端(31)的端面上。
  9. 根据权利要求8所述的电子膨胀阀，其特征在于，所述连接端(31)和所述出口端(32)之间还设置有定位凸缘(33)，所述定位凸缘(33)用于与所述阀座(10)的端部进行抵接定位。
  10. 根据权利要求1至9中任一项所述的电子膨胀阀，其特征在于，所述电子膨胀阀还包括安装基体，所述阀座组件安装于所述安装基体上并与所述安装基体可拆卸连接，所述电子膨胀阀用于汽车上或家用电器上。
PCT/CN2022/072128 2021-03-23 2022-01-14 电子膨胀阀 WO2022199230A1 (zh)

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