WO2012048594A1 - 电动阀及其止动装置 - Google Patents

电动阀及其止动装置 Download PDF

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Publication number
WO2012048594A1
WO2012048594A1 PCT/CN2011/076895 CN2011076895W WO2012048594A1 WO 2012048594 A1 WO2012048594 A1 WO 2012048594A1 CN 2011076895 W CN2011076895 W CN 2011076895W WO 2012048594 A1 WO2012048594 A1 WO 2012048594A1
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WO
WIPO (PCT)
Prior art keywords
nut
electric valve
valve
groove
limiting
Prior art date
Application number
PCT/CN2011/076895
Other languages
English (en)
French (fr)
Inventor
魏先让
Original Assignee
浙江三花股份有限公司
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=45937874&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2012048594(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by 浙江三花股份有限公司 filed Critical 浙江三花股份有限公司
Priority to KR1020127010539A priority Critical patent/KR101478777B1/ko
Priority to JP2012538188A priority patent/JP5510686B2/ja
Publication of WO2012048594A1 publication Critical patent/WO2012048594A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00Construction of housing; Use of materials therefor
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/02Actuating devices; Operating means; Releasing devices electric; magnetic

Definitions

  • the invention relates to a valve, in particular to an electric valve and a stop device thereof.
  • the existing electric valve includes an outer casing, a stator coil sleeved outside the outer casing, a valve seat connected to the lower portion of the outer casing, a magnetic rotor, a valve needle and a valve core seat disposed inside the outer casing, and a motor composed of the stator and the rotor for driving the valve Engage or separate the needle relative to the spool seat.
  • the rotor rotates in the positive and negative directions, and the rotary motion of the rotor is converted into a linear displacement of the valve needle along the axial direction through the transmission of the screw and the nut, thereby adjusting the flow area of the valve port, thereby adjusting the flow into the evaporator.
  • the refrigerant flow ensures efficient operation of the refrigeration system.
  • the upper and lower limit positions of the stop means should be provided.
  • Japanese Patent Publication No. JP2009162366A discloses an electric valve employing the above-described working principle, and axially displaces the valve needle within a predetermined range by a mating slip ring and a spring guide.
  • the nut matched with the valve needle is assembled in the inner hole of the upper part of the guiding sleeve, and the guiding sleeve is welded and fixed with the valve seat;
  • the retaining spring rail is sleeved outside the guiding sleeve, and the tail portion is inserted into the positioning hole of the guiding sleeve
  • the tail of the spring rail needs to be fixed to fix the fixed spring rail;
  • the spring rail is nested inside and outside the slip ring and the two are screwed together, and the slip ring can rotate along the spring rail under the action of the rotor stop And axial displacement until the slip ring abuts the upper or lower stop of the spring rail and is in the extreme working position.
  • the spring rail In the spring rail assembly process of the above solution, first, the spring rail is inserted into the positioning hole of the guiding sleeve, and the tail is fixed to obtain a completely reliable positioning; secondly, before the spring rail tail is fixed, it needs to be controlled.
  • the relative position of the spring rails to ensure their assembly accuracy.
  • the technical problem to be solved by the present invention is to provide an electric valve stopping device for assembling a process cartridge to effectively control the process cost of the electric valve. Based on this, the present invention also provides an electric valve having the above-described stopper device.
  • the electric valve stopping device comprises a spring guide rail and a slip ring which are internally and externally nested and screw-fitted, the spring rail has an upper stop portion and a lower stop portion, and further comprises a nut matched with the electric wide wire rod;
  • the nut has a radially extending step surface, and a nut below the step surface fixedly connected to the electric valve seat has an engagement limiting surface;
  • the spring rail is disposed on the nut above the step surface
  • the lower stop portion radially extends to form a positioning portion that abuts against the step surface, and the lower stop portion below the positioning portion is engaged with the nut upper engagement limiting surface.
  • the engaging limiting surface is specifically a circumferential limiting surface disposed axially on the nut and an axial limiting surface connected to the circumferential limiting surface; and the lowering of the positioning portion
  • the moving portion is specifically a circumferential limiting portion formed in the axial direction and abutting the circumferential limiting surface, and an axis extending circumferentially of the circumferential limiting portion and forming the axis of the axial limiting surface To the limit department.
  • the nut is made of a plastic material, and an annular metal connecting piece for fixedly connecting with the electric valve seat is fixedly mounted on the outer peripheral surface of the nut below the step surface.
  • the nut is integrally injection molded with the annular metal connecting piece.
  • a first groove axially disposed on the nut body between the step surface and the annular metal connecting piece and a circumferentially disposed second groove communicating with the first groove; the circumferential limiting surface And axial limiting surfaces are formed on the groove walls of the first groove and the second groove, respectively.
  • a third EJ slot is axially disposed on the nut body between the stepped surface and the annular metal connecting piece, and an outer edge of the annular metal connecting piece is axially opposite to the third EJ slot.
  • An opening, the circumferential limiting surface is formed on a groove wall of the third groove and a sidewall of the first opening, and the axial limiting surface is formed on the annular metal beside the first opening Connect the lower surface of the sheet.
  • the outer edge of the annular metal connecting piece has a second opening, the circumferential limiting surface is formed on a sidewall of the second opening, and the axial limiting surface is formed in the second opening The lower surface of the side annular metal connecting piece.
  • the electric valve provided by the present invention has a valve seat and an outer casing forming an internal cavity, and the inner cavity is provided with a stopping device matched with the wide needle screw assembly and the rotor, and the stopping device is as described above. Electric valve stop.
  • the wide needle screw assembly comprises:
  • valve needle disposed in the bottom valve seat of the valve seat, one end of which cooperates with the valve port, and the other end of which has an axially disposed inner concave cavity;
  • Positioning the screw rod in the inner concave cavity has a first limiting portion extending radially outwardly, and an outer edge of the inner concave cavity of the valve needle has a second limiting portion extending radially inward
  • the first limiting portion and the second limiting portion are matched to each other.
  • the positioning portion radially extending from the lower stopping portion abuts against the step surface of the nut, thereby realizing the pre-assembled axial positioning of the spring rail, below the positioning portion
  • the lower stop portion is engaged with the engagement limit surface on the nut to fix the spring guide.
  • the spring rail is fixed by the circumferential limiting portion and the axial limiting portion with the circumferential limiting surface and the axial limiting surface on the nut, so that the relative position of the stopping spring rail is fixed.
  • the assembly consistency is more easily ensured, further improving the assembly accuracy of the stop device.
  • the nut is made of a plastic material, so that when the sliding ring is spirally fitted along the spring rail, the frictional resistance between the sliding ring and the outer peripheral surface of the plastic nut is relatively small, which can effectively reduce the electric valve. Resistance to rotor rotation.
  • FIG. 1 is a schematic view showing the overall structure of an electric valve according to a first embodiment
  • FIG. 2 is a schematic view showing the assembly of the stopping device of the electric valve according to the first embodiment
  • Figure 3 is an isometric view of the rotor and the outer casing of the electric valve according to the first embodiment before installation;
  • Figure 4 is a schematic view showing the assembly of the electric valve stopper device according to the second embodiment;
  • Figure 5 is an isometric view of the rotor and the outer casing of the electric valve according to the second embodiment before installation
  • Figure 6 is an isometric view of the rotor and the outer casing of the electric valve according to the third embodiment before installation.
  • Valve needle 21 valve sleeve 22, lead screw 23, retaining ring 24, spring 25;
  • the invention provides an electric valve stopping device with a single assembly process, the core design of which is: the nut matched with the electric valve screw has a radially extending step surface, and the nut below the step surface has a locking limit a spring guide is disposed on the nut above the step surface, and a lower stop portion thereof radially extends to form a positioning portion of the step surface, and a lower stop portion and the nut below the positioning portion The upper snap limit surface is engaged and positioned.
  • This solution can effectively control the process cost of the electric valve, and the present embodiment will be specifically described below with reference to the drawings.
  • FIG. 1 an overall structural diagram of an electric valve according to an embodiment is shown.
  • the valve seat assembly is welded integrally with the valve seat 12 and the valve seat 12 and the connecting tubes 13, 14, and the outer casing 5 is fitted and welded to the valve seat 12 to form a closed valve chamber.
  • a valve needle screw assembly, a nut assembly, a rotor assembly and a stop device are disposed in the valve chamber.
  • the lower end of the valve needle 21 cooperates with the valve hole to open or close the electric valve
  • the upper end has an axially disposed inner concave cavity
  • the upper end portion thereof is welded integrally with the valve needle sleeve 22, that is, the inner concave shape is formed.
  • the outer edge of the cavity has a second inwardly extending portion; the lower end of the lead screw 23 is inserted into the valve sleeve 22, and the head is welded with a retaining ring 24 that is received in the inner EJ cavity.
  • Radially extending The first limiting portion, the retaining ring 24 and the valve needle sleeve 22 abut against each other to achieve axial limitation of the lead screw 23.
  • a spring 25 is disposed in the inner cavity to facilitate the reset of the screw shaft 23.
  • the spring 25 is not limited to the helical compression spring placed between the inner concave cavities after pre-compression as shown in the drawing, in fact, as long as it is a compression elastic which is pre-compressed in the inner concave cavity inside the screw rod Parts are available.
  • the fixed connection relationship between the valve needle 21 and the valve needle sleeve 22 and between the screw rod 23 and the retaining ring 24 is not limited to welding, and other connection methods such as interference pressure matching may be employed.
  • the nut assembly includes a plastic nut 32 and an annular metal connecting piece 31.
  • the metal connecting piece 31 is embedded in the outer peripheral surface of the outer surface of the plastic nut for welding and fixing with the electric valve seat.
  • the plastic nut 32 is preferably made of an engineering resin and injection molded with the annular metal connecting piece 31.
  • the stopping device comprises a spring guide 33 and a slip ring 34 which are nested and screw-fitted inside and outside.
  • the spring rail 33 is sleeved on the outer peripheral surface of the upper part of the plastic nut 32 and has an upper stop portion matched with the stop slip ring 34. And the lower stop.
  • the rotor assembly is composed of a magnetic rotor 41, a rotor stopper 42 and a connecting body connecting the two, the magnetic rotor 41 is fitted on the outer side of the spring rail 33, and the rotor stopper 42 is axially extended to cooperate with the slip ring 34;
  • the spring guide 33, the slip ring 34, and the rotor stop portion 42 constitute the electric wide stop mechanism.
  • the engaging limiting surface is specifically a circumferential limiting surface disposed on the nut 32 and an axial limiting surface connected to the circumferential limiting surface; the spring rail 33 is positioned below the positioning portion
  • the moving portion is specifically a circumferential limiting portion formed by axially extending against the circumferential limiting surface, and an axial limiting portion extending from the circumferential limiting portion and extending from the axial limiting surface, so that the axial limiting portion
  • the assembly consistency of the relative positions of the stop spring guides is more easily ensured, and the assembly accuracy of the stop device is further improved. Please refer to FIG. 2 for details.
  • FIG. 2 is a schematic view showing the assembly of the electric valve stopping device according to the embodiment.
  • the plastic nut 32 is injection molded from engineering plastics, and the main body thereof can be divided into upper, middle and lower parts.
  • the outer circumference of the upper portion 32a is a set portion of the spring guide 33; the outer diameter of the middle portion 32b is larger than the outer diameter of the upper portion, and the upper portion 32a and the middle portion
  • a stepped surface is formed between 32b, and a central portion 32b is provided with a protruding portion 32d.
  • a third recess 32e is disposed in the middle of the protruding portion 32d, and the metal connecting piece 31 is fixedly fixed in the middle portion 32b.
  • the lower portion 32c serves to connect the spool seat 11 The role.
  • the metal connecting piece 41 integrally molded with the nut 32 is provided with a plurality of openings 31c on the outer circumference thereof, wherein one opening 31c is provided in the plastic nut Directly below the protrusion 32d. That is, a circumferential limiting surface is formed on the groove wall of the third groove and the sidewall of the first opening, and the axial limiting surface is formed on the annular metal connecting piece on the side of the first opening lower surface.
  • the opening 31c other than the opening 31c directly below the protruding portion 32d communicates with the upper and lower chambers of the metal connecting piece 31, and can balance the pressure in the two chambers.
  • the spring guide 33 is wound by a steel wire.
  • the main body of the spring guide 33 is a spiral guide portion 33b.
  • the upper portion thereof is an upper stopper portion 33a
  • the lower portion thereof is a lower stopper portion 33c.
  • the lower stopper portion 33c is radially provided with a positioning portion that abuts against the step surface, and the positioning portion extends axially downward to extend the circumferential limiting portion 33d of the spring rail 33, and the circumferential limiting portion 33d extends circumferentially to The axial limit portion 33e of the spring guide 33.
  • the slip ring 34 is also wound by a wire, and is composed of a stopper head 34a, a spiral guide portion 34b, and a stopper tail portion 34c in this order. Since the nut 32 is preferably made of a plastic material, when the slip ring 34 is screw-fitted along the spring rail 33, the frictional resistance against sliding between the outer peripheral surface of the plastic nut 32 is small, and the resistance of the rotation of the electric valve rotor can be effectively reduced.
  • the assembly of the components of the stop device in this solution can be seen in the order of the arrows in FIG.
  • the axis of the spiral guide portion 34b of the slip ring 34 is coincident with the axis of the spiral guide portion 33b of the spring guide 33 in the spiral direction of the spring guide 33 , and the slip ring 34 is placed on the first loop of the spring guide 33.
  • the two are put together on the outer circumference of the upper portion 32a of the plastic nut 32 such that the positioning portion of the spring rail 33 abuts against the stepped surface of the nut 31, and the tail portion of the spring rail 33 (the axial limiting portion 33e) Pulling away from the axis, and then releasing the tail of the spring rail 33, the circumferential limiting portion 33d of the spring rail 33 returns to the original position under the elastic force, and is attached to the protruding portion of the plastic nut 32.
  • the axial limiting portion 33e of the spring rail 33 is also fitted to the lower surface of the opening 31c side of the metal connecting piece 31, and the assembled spring guide is completed. 33 is fixed.
  • FIG. 3 is an isometric view of the rotor and the outer casing of the electric valve according to the embodiment before being installed.
  • the nut and the stop device assembled according to the above assembly method and sequence are placed on the valve seat assembly, that is, the lower portion of the plastic nut 32 is inserted into the valve core seat 11, and then welded (such as laser welding).
  • the metal connecting piece 31 is welded to the upper end edge of the valve seat 12 to securely position the nut 32 to ensure that the nut 32 cannot be rotated or pulled out relative to the valve seat 12.
  • the tail of the spring rail 33 will no longer be able to be pulled away from the axis due to the limitation of the valve seat 12 and the metal tab 31, so that the spring rail 33 is reliably restrained in a fixed position.
  • the invention has the characteristics that the structural cylinder is reliable, and the fixing spring rail can be conveniently and quickly fixed during the assembly process, thereby effectively reducing the assembly process, thereby greatly reducing the process cost.
  • the screw shaft 23 and the slip ring 34 are adjusted to a predetermined position; and the rotor 41 with the rotor stopper portion 42 is placed at a predetermined position. It is assembled to the top end of the lead screw 23, and the rotor connecting body and the top of the lead screw 23 are welded to integrally connect the rotor 41 and the lead screw 23; finally, the outer casing 5 is assembled with the wide seat 12, and the lower end of the outer casing 5 and the valve seat are assembled. 12 upper end seals welded together.
  • the coil drives the electrically wide rotor 41 to rotate, and the stopper of the rotor 41 drives the slip ring 34 to rotate on the spiral guide portion 33b of the spring guide 33.
  • the upper stop portion 33a of the spring guide 33 restricts the slip ring 34 from continuing to rotate upward, thereby acting as an upper stop;
  • the spring guide The lower stop portion 33c of the 33 restricts the slip ring 34 from continuing to rotate downward, thereby functioning as a lower stop.
  • the engaging limiting surface is not limited to the structural arrangement of the circumferential limiting surface and the axial limiting surface shown in the embodiment, as long as the circumferential direction and the axial direction of the spring guide 33 are fixed and fixed. The needs are all within the scope of the claimed application. The following is a detailed description of each of the two embodiments.
  • FIG. 4 is a schematic view of the assembly of the electric valve stop device according to the second embodiment
  • FIG. 5 is a front isometric view of the rotor and the outer casing of the electric valve according to the second embodiment.
  • This embodiment has the same composition and connection relationship as the first embodiment. As shown in Figures 4 and 5, the difference between the two is that the limit recesses on the plastic nut 32 that cooperate with the limit portions on the spring rails 33 are arranged differently.
  • the limit EJ slot of the plastic nut 32 has an "L" shape, that is, a first groove axially disposed on the body of the nut 32 between the step surface and the annular metal connecting piece 31 and the first groove a circumferentially disposed second groove; a circumferential limiting surface and an axial limiting surface are formed on the groove walls of the first groove and the second groove, respectively.
  • the circumferential limiting portion 33d of the spring guide 33 and the axial limiting portion 33e The combination also has an "L" shape similar to the first embodiment.
  • the tail portion of the spring rail 33 is pulled away from the axis, the positioning portion of the spring rail 33 abuts against the stepped surface of the nut 32, and then the tail portion of the spring rail 33 is released, and the spring rail 33 is acted upon by the elastic force.
  • the limit portion returns to the original position, at which time the circumferential limit portion 33d of the spring guide 33 "L” shape and the axial limit portion 33e are just snapped into the recess of the plastic nut 32 of the "L” shape.
  • This embodiment preferably adopts the "L” shape, and of course, adopts other shapes such as "P" shape, "V” shape, "U” shape, "C” shape, "6” shape, etc., all of which can achieve the same positioning fixing effect. Changes in the above derivatives are intended to fall within the scope of the claims.
  • FIG. 6 the figure is an isometric view of the rotor and housing of the electric valve of the third embodiment before installation.
  • This embodiment has the same composition and connection relationship as the first and second embodiments.
  • the embodiment is designed on the basis of the first embodiment, that is, the middle portion of the plastic nut 32 of the present invention is not provided with a protruding portion and a limiting groove, and the structure of other parts is the same as that of the first embodiment. the same.
  • the spring guide 33 of the present embodiment is only limitedly fixed by an opening 31c of the metal connecting piece 31. After the nut and the stopper member are assembled and welded to the valve seat assembly, the tail portion of the spring rail 33 is completely fitted and restrained to the metal. The opening of the tab 31 and the lower surface of its side are joined.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Lift Valve (AREA)
  • Mechanically-Actuated Valves (AREA)

Description

电动阀及其止动装置 本申请要求于 2010 年 10 月 15 日提交中国专利局、 申请号为 201010515238.X、 发明名称为"电动阀及其止动装置 "的中国专利申请的优 先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及一种阀门, 具体涉及一种电动阀及其止动装置。 背景技术
现有的电动阀包括外壳、 套在外壳外的定子线圈和连接在外壳下部的 阀座, 以及位于外壳内的磁转子、 阀针和阀芯座等; 定子和转子构成的电 机用于驱动阀针相对于阀芯座的接合或分离。工作过程中,控制转子的正、 反方向旋转, 通过丝杆和螺母的传动, 将转子的旋转运动转化为阀针沿轴 向直线位移, 从而调节阀口的通流面积, 进而调节流入蒸发器的制冷剂流 量, 保证制冷***的高效运行。 显然, 为确保阀针上、 下位移在预定范围 内进行, 应当设置上、 下极限位置的止动装置。
日本专利文献 JP2009162366A公开了一种采用上述工作原理的电动 阀, 并通过相配合的滑环与弹簧导轨控制阀针在预定范围内轴向位移。 其 中, 与阀针配合的螺母装配在导向套筒上部内孔中, 导向套筒与阀座配套 焊接固定; 止动弹簧导轨套装在导向套筒的外部, 且其尾部***导向套筒 的定位孔中, 并需要对弹簧导轨的尾部进行固定, 以便于定位固定弹簧导 轨; 弹簧导轨与滑环内外嵌套且两者螺旋配合, 该滑环可在转子止动部的 作用下沿着弹簧导轨旋转并轴向位移, 直至滑环与弹簧导轨的上止动部或 者下止动部相抵, 处于极限工作位置。
在上述方案的弹簧导轨装配过程中, 首先, 将弹簧导轨***导向套筒 的定位孔后, 并对其尾部进行固定以获得完全可靠的定位; 其次, 在对弹 簧导轨尾部进行固定之前, 需要控制弹簧导轨的相对位置, 以确保其装配 精度。 显然, 该方案上述构造的装配工序较多, 装配不够便捷, 必然导致 工序成本的增加, 进而增加电动阀的制造成本。
有鉴于此, 亟待针对现有电动阀的止动装置进行优化设计, 以有效解 决现有构造所存在的装配工序较多的缺陷。 发明内容
针对上述缺陷, 本发明解决的技术问题在于, 提供一种装配工艺筒单 的电动阀止动装置, 以有效控制电动阀的工序成本。 在此基础上, 本发明 还提供一种具有上述止动装置的电动阀。
本发明提供的电动阀止动装置, 包括内外嵌套且螺旋配合的弹簧导轨 和滑环, 所述弹簧导轨具有上止动部和下止动部, 还包括与电动阔丝杆配 合的螺母; 所述螺母具有径向伸出的台阶面, 用于与电动阀阀座固定连接 的所述台阶面以下的螺母上具有卡合限位面; 所述弹簧导轨套装在所述台 阶面以上的螺母上, 且其下止动部径向延伸形成与所述台阶面相抵的定位 部, 所述定位部以下的下止动部与所述螺母上卡合限位面卡合定位。
优选地, 所述卡合限位面具体为所述螺母上轴向设置的周向限位面和 与所述周向限位面相连的轴向限位面; 所述定位部以下的下止动部具体为 轴向延伸形成的与所述周向限位面相抵的周向限位部, 和所述周向限位部 周向延伸形成的与所述轴向限位面相 4氏的轴向限位部。
优选地, 所述螺母由塑料材质制成, 且所述台阶面以下的螺母外周表 面嵌装固定有用于与电动阀阀座固定连接的环形金属连接片。
优选地, 所述螺母与所述环形金属连接片一体注塑成形。
优选地, 所述台阶面与环形金属连接片之间的螺母本体上轴向设置的 第一凹槽及与第一凹槽连通的周向设置的第二凹槽; 所述周向限位面和轴 向限位面分别形成于所述第一凹槽和第二凹槽的槽壁。
优选地, 所述台阶面与环形金属连接片之间的螺母本体上轴向设置有 第三 EJ槽, 所述环形金属连接片的外沿开有与所述第三 EJ槽轴向相对的第 一开口, 所述周向限位面形成于所述第三凹槽的槽壁和所述第一开口的侧 壁,所述轴向限位面形成于所述第一开口旁侧的环形金属连接片的下表面。
优选地, 所述环形金属连接片的外沿开有第二开口, 所述周向限位面 形成于所述第二开口的侧壁, 所述轴向限位面形成于所述第二开口旁侧的 环形金属连接片的下表面。 本发明提供的电动阀, 其阀座与外壳形成内部容腔, 所述内部容腔内 设置有与阔针丝杆组件和转子配合的止动装置, 所述止动装置采用如前所 述的电动阀止动装置。
优选地, 所述阔针丝杆组件包括:
置于所述阀座的底部阀芯座内的阀针, 其一端与阀口配合, 其另一端 具有轴向设置的内凹容腔;
中部与所述螺母螺纹配合的丝杆, 其一端与所述转子固定连接, 其另 一端插装于所述阔针的内凹腔内; 和
复位弹性部件, 预压缩置于所述丝杆内侧的内凹容腔中; 且
置于所述内凹容腔中所述丝杆具有径向外伸的第一限位部, 所述阀针 的内凹容腔的外沿具有径向内伸的第二限位部, 所述第一限位部与所述第 二限位部相抵配合。
本发明所述电动阀止动装置的弹簧导轨套装的螺母上部, 其下止动部 径向延伸的定位部与螺母的台阶面相抵, 实现弹簧导轨的预装轴向定位, 该定位部以下的下止动部与螺母上的卡合限位面卡合定位, 实现弹簧导轨 的固定。 与现有技术相比, 本发明具有结构筒单可靠的特点, 装配过程中 可方便、 快速的固定止动弹簧导轨, 有效减少了装配工序, 从而大大降低 了工序成本。
在本发明的优选方案中, 弹簧导轨通过其周向限位部和轴向限位部与 螺母上的周向限位面和轴向限位面卡位固定, 使得止动弹簧导轨的相对位 置的装配一致性更易保证, 进一步提高了止动装置的装配精度。
在本发明的另一优选方案中的螺母由塑料材质制成, 这样, 当滑环沿 弹簧导轨螺旋配合时, 其与塑料螺母外周表面之间相对滑动的摩擦阻力较 小, 可有效降低电动阀转子转动的阻力。 附图说明
图 1是第一实施例所述电动阀的整体结构示意图;
图 2是第一实施例所述电动阀的止动装置组装示意图;
图 3是第一实施例所述电动阀的转子和外壳未安装前等轴测视图; 图 4是第二实施例所述电动阀止动装置组装示意图;
图 5 是第二实施例所述电动阀的转子和外壳未安装前等轴测视图; 图 6是第三实施例所述电动阀的转子和外壳未安装前等轴测视图。 图中:
阀芯座 11、 阀座 12、 连接管 13、 连接管 14;
阀针 21、 阀针套 22、 丝杆 23、 挡圈 24、 弹簧 25;
金属连接片 31、 开口 31c、 螺母 32、 螺母上部 32a、 螺母中部 32b、 螺母下部 32c、 突出部 32d、 第三凹槽 32e、 弹簧导轨 33、 上止动部 33a、 螺旋导向部 33b、 下止动部 33c、 周向限位部 33d、 轴向限位部 33e、 滑环 34、 上止动头部 34a、 螺旋导向部 34b、 下止动尾部 34c;
转子 41、 转子止动部 42;
外壳 5。
具体实施方式
本发明提供了一种装配工艺筒单的电动阀止动装置,其核心设计在于: 与电动阀丝杆配合的螺母具有径向伸出的台阶面, 其台阶面以下的螺母上 具有卡合限位面; 弹簧导轨套装在所述台阶面以上的螺母上, 且其下止动 部径向延伸形成与所述台阶面相 4氏的定位部, 该定位部以下的下止动部与 所述螺母上卡合限位面卡合定位。 该方案可有效控制电动阀的工序成本, 下面结合说明书附图具体说明本实施方式。
请参见图 1 , 该图示出一种实施例所述电动阀的整体结构示意图。 如图 1所示, 阀座组件由阀芯座 11与阀座 12以及连接管 13、 14焊接 成一体, 外壳 5套装并焊接在阀座 12上, 形成密闭的阀腔。 该阀腔内设置 有阀针丝杆组件、 螺母组件、 转子组件和止动装置。
其中, 阀针 21的下端与阀孔配合实现电动阀的开启或者关闭,其上端 具有轴向设置的内凹容腔,且其上端部与阀针套 22焊接成一体, 即形成自 内凹容腔的外沿具有径向内伸的第二限位部;丝杆 23的下端插装于该阀针 套 22,且其头部焊接有卡装在内 EJ容腔之中的挡圈 24, 即形成径向外伸的 第一限位部,该挡圈 24与阀针套 22相抵配合实现丝杆 23轴向限位。 内凹 容腔中设置有弹簧 25 , 以便于丝杆 23的复位。 当然, 弹簧 25不局限于图 中所示的预压缩后置于内凹容腔之间的螺旋压缩弹簧, 实际上只要是预压 缩置于所述丝杆内侧的内凹容腔中的复位弹性部件均可。 同理, 阀针 21 与阀针套 22之间以及丝杆 23与挡圈 24之间的固定连接关系不局限于焊 接, 也可以采用其他连接方式, 比如, 过盈压配等方式。
其中, 螺母组件包括塑料螺母 32和环形金属连接片 31 , 该金属连接 片 31嵌装于塑料螺母的台阶面以下的本体外周表面内,用于与电动阀阀座 焊接固定。 塑料螺母 32优选采用工程树脂, 并与环形金属连接片 31—体 注塑成形。
其中, 止动装置包括内外嵌套且螺旋配合的弹簧导轨 33和滑环 34, 弹簧导轨 33套装在塑料螺母 32上部外周表面上, 并具有与止动滑环 34 配合限位的上止动部和下止动部。
其中, 转子组件由磁转子 41、 转子止动部 42和连接两者的连接体构 成,磁转子 41套装于弹簧导轨 33的外侧,转子止动部 42轴向伸出与滑环 34配合; 上述弹簧导轨 33、 滑环 34、 转子止动部 42构成该电动阔的止动 机构。
本方案中,前述卡合限位面具体为螺母 32上轴向设置的周向限位面和 与该周向限位面相连的轴向限位面;前述弹簧导轨 33定位部以下的下止动 部具体为轴向延伸形成的与周向限位面相抵的周向限位部, 和自周向限位 部周向延伸形成的与轴向限位面相抵的轴向限位部, 使得止动弹簧导轨的 相对位置的装配一致性更易保证, 进一步提高了止动装置的装配精度。 具 体请参见图 2, 该图为本实施例中所述电动阀止动装置组装示意图。
塑料螺母 32由工程塑料注塑而成, 其主体可分为上、 中、 下三部分, 上部 32a的外周为弹簧导轨 33的套装部; 中部 32b的外径较上部外径大, 上部 32a与中部 32b之间形成台阶面, 且中部 32b并设置有突出部 32d , 突出部 32d的中间设置有第三凹槽 32e, 金属连接片 31嵌装固定在中部 32b; 下部 32c起到连接阀芯座 11的作用。 与螺母 32注塑成一体的金属连 接片 41外圆周上设置有若干开口 31c, 其中一个开口 31c设置在塑料螺母 突出部 32d的正下方。 也就是说, 周向限位面形成于所述第三凹槽的槽壁 和所述第一开口的侧壁, 轴向限位面形成于所述第一开口旁侧的环形金属 连接片的下表面。此外,该突出部 32d正下方开口 31c之外的其他开口 31c 连通了金属连接片 31上、下两个容腔,可以起到平衡两个容腔内压力的作 用。
弹簧导轨 33由钢丝绕制而成, 弹簧导轨 33的主体为螺旋导向部 33b, 其上部为上止动部 33a, 其下部为下止动部 33c。 下止动部 33c径向延伸设 置有与台阶面相抵的定位部, 该定位部轴向向下延伸设置有弹簧导轨 33 的周向限位部 33d, 周向限位部 33d再周向延伸为弹簧导轨 33的轴向限位 部 33e。
滑环 34也由钢丝绕制而成, 由止动头部 34a、 螺旋导向部 34b和止动 尾部 34c依次构成。 由于螺母 32优选塑料材质, 这样, 当滑环 34沿弹簧 导轨 33螺旋配合时, 其与塑料螺母 32外周表面之间相对滑动的摩擦阻力 较小, 可有效降低电动阀转子转动的阻力。
本方案中止动装置各部件的组装方式可参见图 2中箭头顺序所示。 首 先, 沿顺着弹簧导轨 33的螺旋方向, 使滑环 34的螺旋导向部 34b的轴线 与弹簧导轨 33的螺旋导向部 33b轴线重合, 并将滑环 34放置在弹簧导轨 33 的第一圈螺旋体上; 然后, 将两者一起套装在塑料螺母 32的上部 32a 外圆周上, 使得弹簧导轨 33的定位部与螺母 31的台阶面相抵预定位, 将 弹簧导轨 33的尾部(轴向限位部 33e )向远离轴线的方向拉开, 再松开弹 簧导轨 33的尾部, 在弹力的作用下弹簧导轨 33的周向限位部 33d回复原 位, 并卡装在塑料螺母 32突出部上设置的第三凹槽 32e和金属连接片 41 外圆周上的开口 31c中,弹簧导轨 33的轴向限位部 33e也卡装在金属连接 片 31的开口 31c—侧的下表面, 完成上述组装后弹簧导轨 33被固定。
请参见图 3 , 该图是本实施例所述电动阀的转子和外壳未安装前等轴 测视图。 如图所示, 将按照上述组装方式和顺序组装完成的螺母、 止动装 置置于阀座组件上, 即将塑料螺母 32下部插装在阀芯座 11上, 然后采用 焊接的方式(比如激光焊接)将金属连接片 31与阀座 12上端边缘焊接在 一起, 以可靠的定位螺母 32, 确保螺母 32不能相对阀座 12转动或拉出。 焊接后,弹簧导轨 33的尾部因为阀座 12和金属连接片 31的限制,将不能 再向远离轴线的方向拉开, 因此弹簧导轨 33被可靠的限制在固定的位置。
与现有技术相比, 本发明具有结构筒单可靠的特点, 装配过程中可方 便、 快速的固定止动弹簧导轨, 有效减少了装配工序, 从而大大降低了工 序成本。
如图 1所示, 按照上述组装方式和顺序完成止动装置的装配后, 将丝 杆 23、 滑环 34调整到规定的位置; 再将带有转子止动部 42的转子 41按 规定的位置装配到丝杆 23的顶端, 并对转子连接体和丝杆 23顶部实施焊 接, 使转子 41和丝杆 23连接成一体; 最后将外壳 5与阔座 12装配, 并将 外壳 5下端与阀座 12上端密封焊接在一起。 这样, 当电动阀工作时, 线圈 驱动电动阔的转子 41转动, 转子 41的止动部会带动滑环 34在弹簧导轨 33的螺旋导向部 33b上转动。 当滑环 34向上转动到顶点时, 弹簧导轨 33 的上止动部 33a会限制滑环 34继续向上转动,从而起到上止动的作用; 当 滑环 34向下转动到顶点时, 弹簧导轨 33的下止动部 33c会限制滑环 34 继续向下转动, 从而起到下止动的作用。
需要说明的是, 卡合限位面不局限于本实施例中所示周向限位面和轴 向限位面的结构设置,只要能够满足周向和轴向限制弹簧导轨 33的尾部定 位固定的需要, 均在本申请请求保护的范围内。 以下以两个实施例分别进 行详细说明。
请参见图 4和图 5 , 其中, 图 4是第二实施例所述电动阀止动装置组 装示意图, 图 5 是第二实施例所述电动阀的转子和外壳未安装前等轴测视 图。
本实施例与第一实施例的组成及连接关系相同。 如图 4和图 5所示, 两者的区别在于与弹簧导轨 33上的限位部相配合的塑料螺母 32上的限位 凹槽设置方式不同。
本方案中塑料螺母 32的限位 EJ槽呈 "L" 形, 即, 台阶面与环形金属 连接片 31之间的螺母 32本体上轴向设置的第一凹槽及与第一凹槽连通的 周向设置的第二凹槽; 周向限位面和轴向限位面分别形成于第一凹槽和第 二凹槽的槽壁。 相应地, 弹簧导轨 33的周向限位部 33d和轴向限位部 33e 组合与第一实施例相似也呈 "L" 形。 装配时, 将弹簧导轨 33的尾部向远 离轴线的方向拉开, 使弹簧导轨 33的定位部与螺母 32的台阶面抵靠, 再 松开弹簧导轨 33的尾部,在弹力的作用下弹簧导轨 33的限位部回复原位, 此时弹簧导轨 33 "L" 形的周向限位部 33d和轴向限位部 33e刚好卡装在 呈 "L" 形的塑料螺母 32的凹槽之中。 本实施例优选的采用了 "L" 字形, 当然采用 "P"字形、 "V" 字形、 "U"字形、 "C"字形、 "6"字形等其他形状, 均可以达到同样的定位固定效果, 上述衍生性的改变应均属于本申请请求 保护的范围。
请参见图 6, 该图是第三实施例所述电动阀的转子和外壳未安装前等 轴测视图。
本实施例与第一、 二实施例的组成及连接关系相同。 如图 6所示, 本 实施例在第一实施例的基础上进行了筒化设计,即本方案塑料螺母 32的中 部没有设置突出部和限位凹槽, 其他零件的结构与第一实施例相同。 本实 施例的弹簧导轨 33仅依靠金属连接片 31的一个开口 31c进行限位固定, 螺母、止动器部件装配并焊接到阀座组件后, 弹簧导轨 33的尾部被完全卡 装并限制在金属连接片 31的开口及其旁侧的下表面。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的 普通技术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干改进 和润饰, 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 电动阀止动装置, 包括内外嵌套且螺旋配合的弹簧导轨和滑环, 所 述弹簧导轨具有上止动部和下止动部, 其特征在于, 还包括:
与电动阀丝杆配合的螺母, 所述螺母具有径向伸出的台阶面; 用于与 电动阀阀座固定连接的所述台阶面以下的螺母上具有卡合限位面;
所述弹簧导轨套装在所述台阶面以上的螺母上, 且其下止动部径向延 伸形成与所述台阶面相 ·ί氏的定位部, 所述定位部以下的下止动部与所述螺 母上卡合限位面卡合定位。
2、根据权利要求 1所述的电动阀止动装置, 其特征在于, 所述卡合限 位面具体为所述螺母上轴向设置的周向限位面和与所述周向限位面相连的 轴向限位面;
所述定位部以下的下止动部具体为轴向延伸形成的与所述周向限位面 相抵的周向限位部, 和所述周向限位部周向延伸形成的与所述轴向限位面 相抵的轴向限位部。
3、根据权利要求 2所述的电动阀止动装置, 其特征在于, 所述螺母由 塑料材质制成, 且所述台阶面以下的螺母外周表面嵌装固定有用于与电动 阀阀座固定连接的环形金属连接片。
4、根据权利要求 3所述的电动阀止动装置, 其特征在于, 所述螺母与 所述环形金属连接片一体注塑成形。
5、根据权利要求 3或 4所述的电动阀止动装置, 其特征在于, 所述台 阶面与环形金属连接片之间的螺母本体上轴向设置的第一凹槽及与第一凹 槽连通的周向设置的第二凹槽; 所述周向限位面和轴向限位面分别形成于 所述第一 EJ槽和第二 EJ槽的槽壁。
6、根据权利要求 3或 4所述的电动阀止动装置, 其特征在于, 所述台 阶面与环形金属连接片之间的螺母本体上轴向设置有第三凹槽, 所述环形 金属连接片的外沿开有与所述第三 HJ槽轴向相对的第一开口, 所述周向限 位面形成于所述第三凹槽的槽壁和所述第一开口的侧壁, 所述轴向限位面 形成于所述第一开口旁侧的环形金属连接片的下表面。
7、根据权利要求 3或 4所述的电动阀止动装置, 其特征在于, 所述环 形金属连接片的外沿开有第二开口, 所述周向限位面形成于所述第二开口 的侧壁, 所述轴向限位面形成于所述第二开口旁侧的环形金属连接片的下 表面。
8、 电动阀, 其阀座与外壳形成内部容腔, 所述内部容腔内设置有与阀 针丝杆组件和转子配合的止动装置, 其特征在于, 所述止动装置采用如权 利要求 1至 7中任一项所述的电动阀止动装置。
9、根据权利要求 8所述的电动阀, 其特征在于, 所述阀针丝杆组件包 括:
置于所述阀座的底部阀芯座内的阀针, 其一端与阀口配合, 其另一端 具有轴向设置的内凹容腔;
中部与所述螺母螺纹配合的丝杆, 其一端与所述转子固定连接, 其另 一端插装于所述阔针的内凹腔内; 和
复位弹性部件, 预压缩置于所述丝杆内侧的内凹容腔中; 且
置于所述内凹容腔中所述丝杆具有径向外伸的第一限位部, 所述阀针 的内凹容腔的外沿具有径向内伸的第二限位部, 所述第一限位部与所述第 二限位部相抵配合。
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