WO2016074555A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2016074555A1
WO2016074555A1 PCT/CN2015/092370 CN2015092370W WO2016074555A1 WO 2016074555 A1 WO2016074555 A1 WO 2016074555A1 CN 2015092370 W CN2015092370 W CN 2015092370W WO 2016074555 A1 WO2016074555 A1 WO 2016074555A1
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Prior art keywords
nut
electronic expansion
expansion valve
noise reduction
screw
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PCT/CN2015/092370
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English (en)
French (fr)
Inventor
宁法前
詹才意
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浙江三花股份有限公司
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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 EP15859770.8A priority Critical patent/EP3220079B1/en
Priority to JP2017542245A priority patent/JP6310161B2/ja
Priority to KR1020177010945A priority patent/KR102013046B1/ko
Publication of WO2016074555A1 publication Critical patent/WO2016074555A1/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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • 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 invention relates to the field of refrigeration control technology, in particular to an electronic expansion valve.
  • the electronic expansion valve is based on the principle of a stepping motor.
  • the coil drives the magnetic rotor component to rotate in the forward and reverse directions.
  • the magnetic rotor component drives the valve needle to rise or fall to change the flow area of the valve port, thereby regulating the flow rate of the fluid medium flowing through the valve port.
  • control. 1 is a schematic structural view of a prior art electronic expansion valve.
  • the main structure of the prior art electronic expansion valve includes a valve seat 1, a nut 2, a valve needle 3, a lead screw 4, a magnetic rotor 5, and a stopper assembly.
  • the valve seat 1 is connected with a vertical pipe 10a and a horizontal pipe.
  • the connecting tube 10b, the vertical connecting tube 10a and the transverse connecting tube 10b are in communication with the valve chamber of the valve seat 1, and the nut 2 is provided with a screw rod 4 screwed to the nut 2, the lower end of the screw rod 4 is connected to the valve needle 3, and the upper end is connected to the magnetic rotor 5.
  • the stop assembly includes a mandrel 61, a spring guide 62, a slip ring 63 and a stop lever 64.
  • the mandrel 61 is fixed to the outer cover by welding the end cover, and the spring guide 62 and the slip ring 63 are sleeved on the mandrel 61.
  • the moving rod 64 is fixedly connected to the lead screw 4.
  • the nut 2 is fixed to the valve seat 1 and includes an internally threaded section 21 that cooperates with the lead screw 4 and a guide section 22 for guiding the lead screw 4.
  • the magnetic rotor 5 rotates in response to the action of the coil (not shown), thereby rotating the screw 4, and the screw 4 and the nut 2 are screwed so that the screw 4 rotates while rotating It also acts as a lifting movement, which drives the valve needle 3 to control the flow of the valve port.
  • the magnetic rotor 5 rotates during the rotation of the lead screw 4, since the threaded engagement between the screw shaft 4 and the nut 2 is guided by the guide section 22 on the nut 2, and the nut 2 and the lead screw There is a certain thread gap between the threaded engagement between the four, which causes the screw rod 4 to deviate from its central axis during the rotation, that is, a certain sloshing occurs during the rotation, thereby causing the electronic expansion valve to generate noise during operation. Due to the difficulty in the fit between the screw 4 and the nut 2 Control, so it is difficult to reduce noise by size control.
  • the present invention provides an electronic expansion valve including a valve seat, a nut disposed on the valve seat, and a threaded rod that is threadedly engaged with the nut, the lead screw being driven by the rotation of the magnetic rotor
  • the valve is adjusted for the valve port flow of the electronic expansion valve;
  • the nut is provided with a nut guiding section
  • the screw rod is provided with a screw guiding section matched with the nut guiding section
  • the nut is close to the nut
  • the end of the guiding section is provided with a noise reduction component and is fixed by a collar.
  • the collar has a cylindrical shape, is fixed with the nut by an interference fit, and surrounds the noise reduction member therein.
  • the distance between the collar and the nut is slightly larger than the height of the noise reduction component.
  • the noise reduction component is an O-ring or a rectangular ring.
  • An interference fit is formed between an outer circumference of the noise reduction member and an inner wall of the collar.
  • the impact force of the threaded engagement between the screw rod and the nut can be reduced, and the running noise is reduced.
  • FIG. 1 is a schematic structural view of a prior art electronic expansion valve
  • FIG. 2 is a schematic structural view of an electronic expansion valve provided by the present invention.
  • FIG. 3 is a schematic structural view of a first embodiment of a noise reduction component of an electronic expansion valve according to the present invention.
  • FIG. 4 is a schematic structural view of a second embodiment of a noise reduction component of an electronic expansion valve according to the present invention.
  • FIG. 5 is a schematic structural view of a third embodiment of a noise reduction component of an electronic expansion valve according to the present invention.
  • FIG. 2 is a schematic structural view of a first embodiment of an electronic expansion valve according to the present invention.
  • the same reference numerals are used for components that have the same structure and function in the prior art.
  • the main structure of the electronic expansion valve of the present embodiment includes a valve seat 1, and the valve seat 1 is respectively connected with a vertical pipe 10a and a horizontal pipe 10b, and the vertical pipe 10a and the horizontal pipe 10b are respectively connected with the valve cavity of the valve seat 1.
  • a valve cover is fixedly disposed on the valve seat, and the outer cover and the valve seat 1 enclose a cavity.
  • the magnetic rotor 5 that rotates in response to the electromagnetic coil is disposed in the cavity, and the magnetic rotor 5 and the screw rod 4 are fastened by, for example, injection molding or riveting. Together, in this way, while the magnetic rotor 5 is rotating, the screw 4 is rotated together.
  • the threaded rod 4 and the nut 2 are connected together by a screw fit.
  • the lower end of the nut 2 is provided with an internal thread section 21, and the upper end is provided with a guide section 22.
  • an outer threaded section 41 is also provided on the outer circumference of the lead screw 4, and the outer threaded section 41 cooperates with the inner threaded section 21, while the guiding section 22 of the nut 2 acts on the lead screw guiding section 42 of the screw shaft 4. Guiding role.
  • the magnetic rotor 5 drives the screw 4 to rotate, under the action of the thread pair, the screw rod 4 moves up and down with the valve needle 3 while rotating, thereby performing the valve port provided on the valve seat 1. Precise control of flow.
  • a stop mechanism is usually also provided in the electronic expansion valve, and reference may be made to the related description of the prior art, and details are not described herein again.
  • a noise reduction member 8 is provided at the upper end of the nut 2, and the noise reduction member 8 can optionally use an O-ring (i.e., the longitudinal section is substantially circular).
  • an O-ring is taken as an example, as shown in FIG.
  • a collar 9 is also provided at the upper end of the nut 2 for fixing.
  • the collar 9 is generally in the shape of an inverted cylinder, which has an interference fit with the nut 2, so that the O-ring can be prevented from being displaced, jumped, misaligned during use of the product, and the O-ring can be ensured In the case of pulling force, it will not fall off.
  • the inner hole of the O-ring and the lead screw guiding section 42 have a slight interference fit, and the outer diameter of the O-ring and the collar 9 are interference fit, since the inner and outer portions of the O-ring are interference fit, so it is better Ground wire
  • the rod 4 reduces the sway and remains on the central shaft, thereby reducing the collision force between the externally threaded section 41 of the screw 4 and the internal threaded section 21 of the nut 2, reducing running noise.
  • a small angle rebound occurs due to the magnetic rotor 5, and the speed and frequency of the rebound are fast. If the rotor rebounds, there is no deceleration mechanism or reduction.
  • the vibration mechanism generates a large noise when it is stopped.
  • the noise reduction member 8 since the noise reduction member 8 is provided, which has elastic properties and a slight interference fit, the technical problem can be effectively solved.
  • the O-ring has a certain elasticity and good lubricity, even if the screw 4 and the O-ring are interference fit, it will not affect the performance of the valve body.
  • the collision force between the screw shaft 4 and the nut 2 is reduced, thereby contributing to reducing the noise generated by the electronic expansion valve during operation.
  • the size of the screw rod 4 is ensured that the screw rod 4 will not be in contact with the sleeve even if it is in the maximum deflection state. Ring 9 is in contact.
  • the O-ring is set to be movable in the axial direction, that is, the distance between the collar 9 and the nut 2 can be set to be slightly larger than the O-ring.
  • the height can ensure that the O-ring will not be stuck.
  • the O-ring can fine-tune the position by itself, thus reducing the chance of product jam.
  • the noise reduction member 8 has been described above by taking an O-ring as an example.
  • a rectangular ring that is, a longitudinal section having a substantially rectangular shape
  • FIG. Or use other suitable shapes, as shown in Figure 5.
  • those skilled in the art can make various suitable changes to the noise reduction component 8 based on the technical suggestion of the present invention, and such variations are also within the scope of the present invention.

Abstract

一种电子膨胀阀包括阀座（1）、设置在所述阀座（1）上的螺母（2）、与所述螺母（2）通过螺纹配合的丝杆（4），所述丝杆（4）随磁性转子（5）旋转而带动阀针（3）对电子膨胀阀的阀口流量进行调节；所述螺母（2）设置有螺母导向段（22），所述丝杠（4）设置有与所述螺母导向段（22）相配合的丝杆导向段（42），在所述螺母（2）的靠近所述螺母导向段（22）的端部设置有减噪部件（8），并通过套环（9）进行固定。通过在螺母的上方设置减噪部件，并通过套环进行固定，可以减小丝杆与螺母之间的螺纹配合的撞击力度，减小运行的噪音。

Description

电子膨胀阀
本申请要求于2014年11月13日提交中国专利局、申请号为201410637903.0、发明名称为“电子膨胀阀”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
本发明涉及制冷控制技术领域，特别是一种电子膨胀阀。
背景技术
目前，电子膨胀阀广泛应用于流体的节流膨胀和流量调节。电子膨胀阀是利用步进电机的原理，用线圈驱动磁转子部件正反向转动，磁转子部件带动阀针上升或下降以改变阀口流通面积，从而对流经阀口的流体介质进行流量的调节和控制。图1为现有技术电子膨胀阀的结构示意图。如图1所示，现有技术电子膨胀阀的主体结构包括阀座1、螺母2、阀针3、丝杆4、磁转子5以及止动组件，阀座1上连接有竖接管10a和横接管10b，竖接管10a和横接管10b与阀座1的阀腔连通，螺母2上设置有与螺母2螺纹连接的丝杆4，丝杆4的下端连接阀针3，上端连接磁转子5。止动组件包括芯轴61、弹簧导轨62、滑环63和止动杆64，其中芯轴61通过端盖焊接固定在外罩上，弹簧导轨62和滑环63套设在芯轴61上，止动杆64与丝杆4固定连接。
螺母2固定在阀座1上，其包括与丝杆4配合的内螺纹段21以及用于对丝杆4进行导向的导向段22。
电子膨胀阀工作时，磁转子5响应线圈(图中未示出)的动作而旋转，从而带动丝杆4旋转，丝杆4与螺母2是通过螺纹连接的，这样丝杆4在旋转的同时也作升降运动，从而带动阀针3对阀口的流通量进行控制。
然而，这种结构中，磁转子5在带动丝杆4旋转过程中，由于丝杆4与螺母2之间的螺纹配合是通过螺母2上的导向段22进行导向的，而螺母2与丝杆4之间的螺纹配合存在一定的螺纹间隙，从而导致丝杆4在转动过程中会偏离其中心轴线，即在旋转的时候会发生一定的晃动，从而导致电子膨胀阀在运行时产生噪音。由于丝杆4和螺母2之间的配合间隙较难 控制，因此很难通过尺寸的控制来降低噪音。
因此，如何设计一种能够降低电子膨胀阀的噪音，而又无需依赖于丝杆螺母之间的非常精确的配合尺寸，是本领域技术人员亟待解决的技术问题。
发明内容
本发明的目的是提供一种电子膨胀阀，能够有效解决现有电子膨胀阀由于丝杆和螺母之间存在的配合间隙导致噪音的技术缺陷。
为了实现上述目的，本发明提供了一种电子膨胀阀，包括阀座、设置在所述阀座上的螺母、与所述螺母通过螺纹配合的丝杆，所述丝杆随磁性转子旋转而带动阀针对电子膨胀阀的阀口流量进行调节；所述螺母设置有螺母导向段，所述丝杆设置有与所述螺母导向段相配合的丝杆导向段，在所述螺母的靠近所述螺母导向段的端部设置有减噪部件，并通过套环进行固定。
所述套环呈圆筒状，与所述螺母通过过盈配合固定，并将所述减噪部件包围在其内部。
所述套环与所述螺母之间的距离略大于所述减噪部件的高度。
所述减噪部件为O型圈或者矩形圈。
所述减噪部件的外周与所述套环的内壁之间为过盈配合。
所述减噪部件的内周与所述丝杆之间为过盈配合。
本发明通过在螺母的上方设置减噪部件，并通过套环进行固定，可以减小丝杆与螺母之间的螺纹配合的撞击力度，减小了运行的噪音。
附图说明
图1为现有技术电子膨胀阀的结构示意图；
图2为本发明提供的电子膨胀阀结构示意图；
图3为本发明电子膨胀阀减噪部件第一实施例的结构示意图；
图4为本发明电子膨胀阀减噪部件第二实施例的结构示意图；
图5为本发明电子膨胀阀减噪部件第三实施例的结构示意图。
具体实施方式
下面通过附图和实施例，对本发明的技术方案做进一步的详细描述。
请参照图2，图2为本发明提供的电子膨胀阀第一实施方式的结构示意图。为了便于描述本发明与现有技术的区别，对于和现有技术中采用相同结构并且起到相同功能的部件均采用同一附图标记。
如图2所示，本实施例电子膨胀阀的主体结构包括阀座1，阀座1上分别连接有竖接管10a和横接管10b，竖接管10a和横接管10b均与阀座1的阀腔相连通。阀座上固定设置有外罩，外罩与阀座1围成腔体，在腔体内设置有响应电磁线圈而旋转的磁性转子5，磁性转子5与丝杆4通过如注塑成型或者铆接等方式紧固在一起，这样，在磁性转子5转动的同时，就会带动丝杆4一起转动。
丝杆4与螺母2之间通过螺纹配合的方式连接在一起，具体地，螺母2的下端部设置有内螺纹段21，上端则设置有导向段22。相应地，在丝杆4的外周也设置有外螺纹段41，通过外螺纹段41与内螺纹段21相配合，同时螺母2的导向段22则对丝杆4的丝杆导向段42起到导向作用。这样，在磁性转子5带动丝杆4旋转的同时，在螺纹副的作用下，丝杆4就带着阀针3在旋转的同时作升降运动，从而对设置在阀座1上的阀口进行流量的精确控制。
为了限定阀针3的位移范围，通常还在电子膨胀阀中设置止动机构，可以参照现有技术的相关描述，在此不再一一赘述。
在螺母2的上端部设置有减噪部件8，减噪部件8可以选择使用O型圈(即纵截面大致呈圆形)。在本实施方式中，为了描述方便，以O型圈为例进行说明，如图3所示。为了使O型圈固定，在螺母2上端还设置有套环9进行固定。套环9大体呈倒置的圆筒形，其与螺母2为过盈配合，这样，可以限制O型圈在产品使用时不会发生偏移、跳动、错位，又能够确保O型圈在受到一定拉力的情况下，不至于脱落。
O型圈的内孔与丝杆导向段42为轻微过盈配合，O型圈的外径与套环9则为过盈配合，由于O型圈的内外均为过盈配合，因此可以较好地使丝 杆4减轻晃动，并保持在中心轴，从而降低丝杆4的外螺纹段41与螺母2的内螺纹段21之间的碰撞力度，减小了运行噪音。而当电子膨胀阀进入止动状态时，因磁性转子5在止动时会发生小角度的回弹，而且这个回弹的速度、频率都很快，若转子回弹时完全没有减速机制或减震机制，则止动时会产生较大的噪音，而在本实施方式中，由于设置了减噪部件8，其具有弹性性能和轻微过盈配合，能够有效地解决该技术问题。
同时，由于O型圈具有一定的弹性，且润滑性较好，即使丝杆4与O型圈为过盈配合，也不会对阀体的动作性能带来影响。
由于减噪部件8的设置，降低了丝杆4与螺母2之间的碰撞力度，从而有利于降低电子膨胀阀在运行时产生的噪音。
为了保证阀体在运行过程中，丝杆4不会和套环9、螺母导向段22之间产生碰撞摩擦，在尺寸设计上确保丝杆4即使处于最大偏斜状态下，仍不会与套环9接触。
同时，为了确保O型圈装配后的同轴度能满足产品的使用要求，O型圈在轴向设置为可活动，即套环9与螺母2之间的距离可以设置为略大于O型圈的高度，这样可以保证O型圈不会被卡死，在电子膨胀阀运行过程中，O型圈可以自行微调位置，从而降低产品卡死的几率。
以上以O型圈为例对减噪部件8进行了说明，当然，除了O型圈之外，还可以采用矩形圈(即纵截面呈大致的矩形状)，如图4所示。或者采用其它适宜的形状，如图5所示。应当说明的是，本领域技术人员基于本发明的技术启示，可以对减噪部件8作出各种合适的变化，而这些变化也应当属于本发明的保护范围之内。
此外，在上述对实施方式的具体描述中，其上、下、左、右等方位词均是以附图2所示为基准进行说明，不应当理解为对本发明的限制。
最后应说明的是：以上实施例仅用以说明本发明的技术方案而非限制，尽管参照较佳实施例对本发明进行了详细说明，本领域的普通技术人员应当理解，可以对本发明的技术方案进行修改或者等同替换，而不脱离本发明技术方案的精神和范围。

Claims (6)

  1. 一种电子膨胀阀，包括阀座(1)、设置在所述阀座(1)上的螺母(2)、与所述螺母(2)通过螺纹配合的丝杆(4)，所述丝杆(4)随磁性转子(5)旋转而带动阀针(3)对电子膨胀阀的阀口流量进行调节；其特征在于，所述螺母(2)设置有螺母导向段(22)，所述丝杆(4)设置有与所述螺母导向段(22)相配合的丝杆导向段(42)，在所述螺母(2)的靠近所述螺母导向段(22)的端部设置有减噪部件(8)，并通过套环(9)进行固定。
  2. 如权利要求1所述的电子膨胀阀，其特征在于，所述套环(9)呈圆筒状，与所述螺母(2)通过过盈配合固定，并将所述减噪部件(8)包围在其内部。
  3. 如权利要求2所述的电子膨胀阀，其特征在于，所述套环(9)与所述螺母(2)之间的距离略大于所述减噪部件(8)的高度。
  4. 如权利要求1所述的电子膨胀阀，其特征在于，所述减噪部件(8)为O型圈或者矩形圈。
  5. 如权利要求3所述的电子膨胀阀，其特征在于，所述减噪部件(8)的外周与所述套环(9)的内壁之间为过盈配合。
  6. 如权利要求3所述的电子膨胀阀，其特征在于，所述减噪部件(8)的内周与所述丝杆(4)之间为过盈配合。
PCT/CN2015/092370 2014-11-13 2015-10-21 电子膨胀阀 WO2016074555A1 (zh)

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