WO2021042955A1 - 电子膨胀阀 - Google Patents

电子膨胀阀 Download PDF

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Publication number
WO2021042955A1
WO2021042955A1 PCT/CN2020/108801 CN2020108801W WO2021042955A1 WO 2021042955 A1 WO2021042955 A1 WO 2021042955A1 CN 2020108801 W CN2020108801 W CN 2020108801W WO 2021042955 A1 WO2021042955 A1 WO 2021042955A1
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WO
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Prior art keywords
movable
valve member
electronic expansion
movable valve
stationary
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PCT/CN2020/108801
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English (en)
French (fr)
Inventor
朱延鑫
刘敬喜
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艾默生环境优化技术(苏州)有限公司
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Priority claimed from CN201910842344.XA external-priority patent/CN112460860A/zh
Priority claimed from CN201921485851.4U external-priority patent/CN211261369U/zh
Application filed by 艾默生环境优化技术(苏州)有限公司 filed Critical 艾默生环境优化技术(苏州)有限公司
Publication of WO2021042955A1 publication Critical patent/WO2021042955A1/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
    • F16K1/52—Means for additional adjustment of the rate of flow

Definitions

  • the present disclosure relates to an electronic expansion valve.
  • the electronic expansion valve is an important part of the refrigeration/heating system, mainly used to adjust the flow of refrigerant fluid.
  • the traditional electronic expansion valve is generally controlled by a stepper motor, and is usually composed of a drive mechanism (stepper motor), an actuator (screw screw mechanism), a throttle mechanism (valve needle valve seat) and related auxiliary mechanisms.
  • the purpose of the present disclosure is to improve one or more technical problems mentioned above.
  • an electronic expansion valve comprising:
  • a movable valve member at least a part of the movable valve member is disposed in a space defined by a diversion cavity assembly, the diversion cavity assembly includes a fluid port, and the movable valve member is used to close and open the fluid Port;
  • An actuator the actuator is used to drive the movable valve member to perform an axial movement while performing a rotational movement
  • the electronic expansion valve further includes a stop mechanism, and the stop mechanism includes a movable stop member and a static position member,
  • the movable stopper is provided on the movable valve member and moves along with the movable valve member
  • the stationary member is provided on the diversion cavity assembly and is configured to be able to interact with The movable stopper abuts, thereby restricting the range of the axial movement of the movable valve member.
  • the stop mechanism includes one movable stop and two stationary positions, and the stop mechanism is configured such that one movable stop can be connected to two The stationary position pieces are respectively abutted such that when the movable stop piece abuts against the first stationary position piece of the two stationary positions, the movable valve member closes the fluid port; When the movable stopper abuts against the second one of the two stationary positions, the distance between the movable valve member and the fluid port reaches a maximum value.
  • the diversion cavity assembly includes a guide sleeve configured to be in clearance fit with the movable valve member and guide the axial movement of the movable valve member, and Only one of the two stationary positions is arranged on the guide sleeve.
  • the other of the two stationary members is arranged on a valve seat of the flow guiding cavity assembly that defines the fluid port or a housing part of the flow guiding cavity assembly.
  • the stop mechanism includes two movable stops and two stationary positions, and the stop mechanism is configured such that the two movable stops can interact with each other.
  • the two stationary positions are respectively abutted such that when the first one of the two movable stops abuts against the first one of the two stationary positions, the The movable valve member closes the fluid port; when the second one of the two movable stops abuts against the second one of the two stationary positions, the movable The distance between the valve member and the fluid port reaches the maximum value.
  • the diversion cavity assembly includes a guide sleeve configured to be in clearance fit with the movable valve member and guide the axial movement of the movable valve member, and The two stationary parts are both arranged on the guide sleeve.
  • the movable stopper and the stationary positioner are configured to be able to abut each other in the circumferential direction of the rotational movement of the movable valve member.
  • the movable stopper is integrally formed with the movable valve member or is fixed to the movable valve member by welding, bonding, snapping, plugging, etc., and the stationary
  • the positioning member and the diversion cavity assembly are integrally formed or fixed to the diversion cavity assembly by means of welding, bonding, clamping, plugging, and the like.
  • the diversion chamber assembly includes a valve seat, the fluid port is provided in the valve seat, and one end of the movable valve member is used to engage with the valve seat to close the valve seat.
  • the fluid port, and the actuator includes a spindle that is fixedly connected to the movable valve member and drives the movable valve member to perform an axial movement while performing a rotational movement.
  • the movable valve member is an integral structure.
  • the movable stop has a stop plane, and when the movable stop abuts against the stationary position, the stop plane of the movable stop is in line with the stationary position. Position piece contact.
  • the electronic expansion valve according to the present disclosure brings at least the following beneficial technical effects: the electronic expansion valve according to the present disclosure can accurately limit the axial stroke range of the threaded transmission mechanism by adopting the above-mentioned stop mechanism, thereby The jamming of the thread pair is effectively avoided, and the electronic expansion valve according to the present disclosure has a small number of components, a simple structure, easy processing and manufacturing, and high cost-effectiveness.
  • Fig. 1 shows a longitudinal sectional view of an electronic expansion valve according to a first preferred embodiment of the present disclosure
  • Figures 2a and 2b show two stop states of the stop mechanism in Figure 1, wherein Figure 2a shows the stop state where the fluid outlet is closed, and Figure 2b shows the stop state where the fluid outlet is opened status;
  • Fig. 3a shows an enlarged schematic diagram of a movable stop of the stop mechanism in Fig. 1;
  • Fig. 3b shows an enlarged schematic diagram of the stationary member of the stop mechanism in Fig. 1;
  • FIG. 4 shows a partially enlarged cross-sectional view of the electronic expansion valve according to the second preferred embodiment of the present disclosure, in which the configuration of the movable valve member and its stop mechanism is shown in detail;
  • Figures 5a and 5b show two stop states of the stop mechanism in Figure 4, wherein Figure 5a shows the stop state where the fluid outlet is closed, and Figure 5b shows the stop state where the fluid outlet is opened status.
  • Electronic expansion valve 1 valve assembly 10; movable valve member 11; actuator 50; drive mechanism 40
  • Diversion cavity assembly 12 inlet pipe 92; fluid inlet 121; outlet pipe 94; fluid outlet 122
  • Valve seat 18 first end of movable valve member 141; second end of movable valve member 142
  • FIGS. 1-5b The preferred embodiments of the present disclosure will now be described in detail with reference to FIGS. 1-5b.
  • the following description is merely exemplary in nature and is not intended to limit the present disclosure and its applications or uses.
  • FIG. 1 shows a longitudinal cross-sectional view of an electronic expansion valve according to a first preferred embodiment of the present disclosure.
  • the electronic expansion valve 1 may include: a valve assembly 10 for adjusting the flow rate of the fluid flowing through the electronic expansion valve 1; and a movable valve member 11 for driving the valve assembly 10 to perform rotational movement and axial movement at the same time The actuator 50; and the drive mechanism 40 that provides power to the actuator 50.
  • the valve assembly 10 includes a diversion cavity assembly 12, the diversion cavity assembly 12 includes a housing so as to define an internal space for accommodating the movable valve member 11 of the valve assembly 10, and the diversion cavity assembly 12 also includes The fluid inlet 121 connected with the inlet pipe 92 and the fluid outlet 122 connected with the outlet pipe 94. The fluid flows into the electronic expansion valve 1 through the inlet pipe 92, and then flows out of the electronic expansion valve 1 through the outlet pipe 94.
  • the diversion cavity assembly 12 further includes a valve seat 18, and the fluid outlet 122 is provided in the valve seat 18.
  • the movable valve member 11 performs rotational movement and axial movement under the drive of the actuator 50, so that the movable valve member 11 can open and close the fluid outlet 122 in the valve seat 18 and adjust the electronic expansion.
  • the movable valve member 11 may include a first end (upper end) 141 and a second end (lower end) 142.
  • the first end 141 is used to connect to the spindle 51 described in detail below, and the second end 142 is used to connect to the valve seat. 18 engages to close the fluid outlet 122.
  • the driving mechanism 40 may be a motor including a stator 41 and a rotor 42.
  • the rotor 42 can rotate in the stator 41, and the rotor 42 and the spindle 51 of the actuator 50 are injection molded into one body, so that the rotor 42 and the spindle 51 rotate integrally when the driving mechanism (motor) 40 is energized.
  • the rotor 42 and the spindle 51 may also be formed separately, and then fixedly connected together in a suitable manner.
  • the rotor 42 is implemented as a cylindrical magnetic ring with an open end.
  • a cylindrical housing 421 is provided between the rotor 42 and the stator 41 to define a rotor cavity 422.
  • the stator 41 is fixed to the outside of the cylindrical housing 421.
  • the shafts 51 are all arranged in the rotor cavity 422 and can move axially relative to the cylindrical housing 421 and the stator 41, which will be described in detail below.
  • cylindrical casing 421 is fixedly connected to the outer shell of the diversion cavity assembly 12, and both the cylindrical casing 421 and the diversion cavity assembly 12 are fixed relative to the casing of the electronic expansion valve 1.
  • the electronic expansion valve 1 may further include a holding member 60 having an internal thread.
  • the holding member 60 is fixed to one end of the cylindrical housing 421 and provides support for the spindle 51.
  • the spindle 51 may include a first end ( Upper end) 511 and second end (lower end) 512.
  • the first end 511 is formed with an external thread and is threadedly connected with the holding member 60 having an internal thread, and the second end 512 is used to connect with the first end 141 of the movable valve member 11, or the spindle 51 can also be connected with the movable valve
  • the member 11 is integrally formed.
  • the threaded fit between the spindle 51 and the holding member 60 encourages the rotor 42 and the spindle 51 to perform axial movement at the same time, so that the rotor 42 and the spindle 51 are in progress. While rotating, it makes axial movement, and driven by the spindle 51, the movable valve member 11 also makes axial movement while rotating.
  • FIGS. 1-3b show a partial enlarged cross-sectional view of the electronic expansion valve in Fig. 1, which shows in detail the configuration of the movable valve member and its stop mechanism;
  • Figs. 2a and 2b show Fig. 1
  • Figure 2a shows the stop state with the fluid outlet closed;
  • Figure 2b shows the stop state with the fluid outlet opened;
  • Figure 3a shows the stop state in Figure 1
  • FIG. 3b shows an enlarged schematic view of the stationary position member of the stop mechanism in FIG. 1.
  • the stop mechanism includes two moving stops 191-a first moving stop 1911 and a second moving stop 1912-and two stationary stops-
  • the first stationary member 1921 and the second stationary member 1922, the two moving stop members 191 are provided on the movable valve member 11 and perform rotational and axial movement together with the movable valve member 11, the
  • the two stationary parts are disposed on the diversion cavity assembly 12 and are configured to be able to respectively abut the two movable stop parts 191 circumferentially to limit the range of the axial movement of the movable valve member 11.
  • the diversion chamber assembly 12 includes a guide sleeve 123 configured to be in clearance fit with the movable valve member 11 and guide the axial movement of the movable valve member 11, and the first stationary member 1921 and the second stationary member 1921
  • the stationary parts 1922 are all arranged on the guide sleeve 123.
  • the movable stopper 191 and the stationary positioner can be independent pin-shaped members, and a corresponding hole is provided on the movable valve member 11 to receive each movable stopper 191, and the guide sleeve 123 Corresponding sockets are provided to receive each stationary position.
  • the present disclosure is not limited to this.
  • Each of the movable stoppers 191 can also be integrally formed with the movable valve member 11 or fixed to the movable valve member 11 by any suitable means such as welding, bonding, snapping, and plugging.
  • the stationary member may be integrally formed with the guide sleeve 123 or be fixed to the guide sleeve 123 or other parts of the diversion cavity assembly 12 except for the guide sleeve 123 by welding, bonding, snapping, plugging, or any other suitable method.
  • Figures 3a and 3b respectively show the preferred shapes of the movable stop 191 and the stationary position, wherein the stationary position is roughly cylindrical, one end of which is chamfered so as to be inserted into the socket and form an interference fit;
  • the movable stop 191 is a substantially cylindrical member with a stop plane.
  • the stop plane of the movable stop 191 is in contact with the stationary position, and the stop plane It is preferably formed as a platform portion 1910 as shown in the figure, and the platform portion 1910 is used for circumferential contact with the cylindrical surface of the stationary position member.
  • the present disclosure is not limited to this. According to actual applications, the movable stop 191 and the stationary position can have any other suitable shapes, as long as the movable stop 191 and the stationary position can be abutted in a circumferential direction.
  • FIGS. 4-5b show a partially enlarged cross-sectional view of the electronic expansion valve according to the second preferred embodiment of the present disclosure, which shows in detail the configuration of the movable valve member and its stop mechanism;
  • FIGS. 5a and 5b show Two stop states of the stop mechanism in Fig. 4 are shown.
  • Fig. 5a shows the stop state with the fluid outlet closed;
  • Fig. 5b shows the stop state with the fluid outlet opened.
  • the electronic expansion valve according to the second preferred embodiment of the present disclosure has substantially the same configuration as the electronic expansion valve of the first preferred embodiment.
  • the stop mechanism of the electronic expansion valve 1 of the second preferred embodiment includes a movable The stop piece 191 and two stationary pieces—a first stationary piece 1921 and a second stationary piece 1922, wherein the one movable stop piece 191 is preferably arranged at an appropriate position of the movable valve member 11,
  • the first stationary member 1921 is disposed at the lower valve seat 18 of the guide cavity assembly 12, and the second stationary member 1922 is disposed on the guide sleeve 123.
  • the second end 142 of the valve needle 14 closes the fluid outlet 122 of the valve seat 18; when the movable stop 191 abuts against the second stationary member 1922 , The distance between the second end 142 of the valve needle 14 and the valve seat 18 reaches the maximum value, that is, the opening degree of the fluid outlet 122 reaches the maximum value.
  • the stationary position may not be arranged on the guide sleeve 123, but all are arranged in addition to the diversion cavity assembly 12. At other parts except the guide sleeve 123, as long as the technical purpose of the present disclosure can be achieved, even the electronic expansion valve 1 of the present disclosure may not include the guide sleeve 123.
  • the movable stopper and the stationary positioner are designed to limit the axial stroke range of the movable valve member in a circumferential abutment manner, it is feasible that the movable stopper can also be stopped.
  • the position piece and the stationary position piece are designed to limit the axial stroke range of the movable valve member in an axial abutment manner.

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

Abstract

一种电子膨胀阀（1），包括：可动阀构件（11），可动阀构件（11）的至少一部分设置在由导流腔组件（12）限定的空间内，导流腔组件（12）包括流体端口（121，122）；以及执行机构（50），执行机构（50）用于驱动可动阀构件（11）以在进行旋转运动的同时进行轴向运动。电子膨胀阀（1）还包括止位机构，止位机构包括动止位件（1911，1912）和静止位件（1921，1922），动止位件（1911，1912）设置在可动阀构件（11）上并随着可动阀构件（11）一起运动，静止位件（1921，1922）设置在导流腔组件（12）上并且构造为能够与动止位件（1911，1912）抵接，由此限制可动阀构件（11）的轴向运动的范围。

Description

电子膨胀阀
本申请要求以下中国专利申请的优先权：于2019年9月6日提交中国专利局的申请号为201910842344.X、发明创造名称为“电子膨胀阀”的中国专利申请；以及于2019年9月6日提交中国专利局的申请号为201921485851.4、发明创造名称为“电子膨胀阀”的中国专利申请。该专利申请的全部内容通过引用结合在本申请中。
技术领域
本公开涉及一种电子膨胀阀。
背景技术
本部分提供了与本公开相关的背景信息，这些信息并不必然构成现有技术。
电子膨胀阀是制冷/制热系统中的重要部件，主要用于对制冷剂流体的流量进行调节。传统的电子膨胀阀一般采用步进电机进行控制，并且通常由驱动机构(步进电机)、执行机构(螺纹螺杆机构)、节流机构(阀针阀座)以及相关的辅助机构构成。
由于采用螺纹螺杆机构进行传动，在阀针上下移动的过程中，例如在阀门(流体出口)的全开和全关位置中，可能会发生因转子过度旋转而引起的螺纹副卡死的问题，从而难以保证螺纹副的顺利传动。
因此，需要提供一种能够解决上述技术问题的改进的电子膨胀阀。
发明内容
在本部分中提供本公开的总体概要，而不是本公开完全范围或本公开所有特征的全面公开。
本公开的目的是在上面提到的一个或多个技术问题方面进行改进。
根据本公开的一个方面，提供了一种电子膨胀阀，所述电子膨胀阀包括：
可动阀构件，所述可动阀构件的至少一部分设置在由导流腔组件限定的空间内，所述导流腔组件包括流体端口，所述可动阀构件用于封闭和打开所述流 体端口；以及
执行机构，所述执行机构用于驱动所述可动阀构件以在进行旋转运动的同时进行轴向运动，
其中，所述电子膨胀阀还包括止位机构，所述止位机构包括动止位件和静止位件，
其特征在于，所述动止位件设置在所述可动阀构件上并随着所述可动阀构件一起运动，所述静止位件设置在所述导流腔组件上并且构造为能够与所述动止位件抵接，由此限制所述可动阀构件的轴向运动的范围。
根据本公开的一个优选实施方式，所述止位机构包括一个所述动止位件和两个所述静止位件，所述止位机构构造成使得一个所述动止位件能够与两个所述静止位件分别抵接成：当所述动止位件与两个所述静止位件中的第一静止位件抵接时，所述可动阀构件封闭所述流体端口；当所述动止位件与两个所述静止位件中的第二静止位件抵接时，所述可动阀构件与所述流体端口的距离达到最大值。
根据本公开的一个优选实施方式，所述导流腔组件包括导向套，所述导向套构造成与所述可动阀构件间隙配合并对所述可动阀构件的轴向运动进行导向，并且两个所述静止位件中的仅一个设置在所述导向套上。
根据本公开的一个优选实施方式，两个所述静止位件中的另一个设置在所述导流腔组件的限定所述流体端口的阀座上或所述导流腔组件的外壳部分。
根据本公开的一个优选实施方式，所述止位机构包括两个所述动止位件和两个所述静止位件，所述止位机构构造成使得两个所述动止位件能够与两个所述静止位件分别抵接成：当两个所述动止位件中的第一动止位件与两个所述静止位件中的第一静止位件抵接时，所述可动阀构件封闭所述流体端口；当两个所述动止位件中的第二动止位件与两个所述静止位件中的第二静止位件抵接时，所述可动阀构件与所述流体端口的距离达到最大值。
根据本公开的一个优选实施方式，所述导流腔组件包括导向套，所述导向套构造成与所述可动阀构件间隙配合并对所述可动阀构件的轴向运动进行导向，并且两个所述静止位件均设置在所述导向套上。
根据本公开的一个优选实施方式，所述动止位件和所述静止位件构造成能够沿所述可动阀构件的旋转运动的周向方向彼此抵接。
根据本公开的一个优选实施方式，所述动止位件与所述可动阀构件一体成型或者通过焊接、粘合、卡合、插接等方式固定至所述可动阀构件，所述静止位件与所述导流腔组件一体成型或者通过焊接、粘合、卡合、插接等方式固定至所述导流腔组件。
根据本公开的一个优选实施方式，所述导流腔组件包括阀座，所述流体端口设置在所述阀座中，所述可动阀构件的一端用于与所述阀座接合从而封闭所述流体端口，并且所述执行机构包括心轴，所述心轴固定地连接至所述可动阀构件并带动所述可动阀构件在进行旋转运动的同时进行轴向运动。
根据本公开的一个优选实施方式，所述可动阀构件为一体式结构。
根据本公开的一个优选实施方式，所述动止位件具有止位平面，当所述动止位件抵接所述静止位件时，所述动止位件的止位平面与所述静止位件接触。
综上可知，根据本公开的电子膨胀阀至少带来以下有益技术效果：根据本公开的电子膨胀阀通过采用如上所述的止位机构而能够准确地限定螺纹传动机构的轴向行程范围，从而有效避免螺纹副卡死的情况，并且根据本公开的电子膨胀阀的部件数目较少且结构简单、易于加工制造，具有较高的成本效益。
附图说明
根据以下参照附图的详细描述，本公开的前述及另外的特征和特点将变得更加清楚，这些附图仅作为示例并且不一定是按比例绘制。在附图中采用相同的附图标记指示相同的部件，在附图中：
图1示出根据本公开的第一优选实施方式的电子膨胀阀的纵向剖视图；
图2a和图2b示出了图1中的止位机构的两种止位状态，其中，图2a示出了流体出口被封闭的止位状态，图2b示出了流体出口被打开的止位状态；
图3a示出了图1中的止位机构的动止位件的放大的示意图；
图3b示出了图1中的止位机构的静止位件的放大的示意图；
图4示出根据本公开的第二优选实施方式的电子膨胀阀的局部放大的剖视图，其中详细示出了可动阀构件及其止位机构的构型；
图5a和图5b示出了图4中的止位机构的两种止位状态，其中，图5a示出了流体出口被封闭的止位状态，图5b示出了流体出口被打开的止位状态。
参考标记列表
电子膨胀阀1；阀组件10；可动阀构件11；执行机构50；驱动机构40
导流腔组件12；入流管92；流体入口121；出流管94；流体出口122
阀座18；可动阀构件第一端141；可动阀构件第二端142
定子41；转子42；心轴51；筒状壳体421；转子腔422
保持构件60；心轴第一端511；心轴第二端512
动止位件191；第一动止位件1911；平台部1910
第二动止位件1912；第一静止位件1921
第二静止位件1922；导向套123
具体实施方式
现在将结合附图1-5b对本公开的优选实施方式进行详细描述。以下的描述在本质上只是示例性的而非意在限制本公开及其应用或用途。
首先，将参照图1描述根据本公开第一实施方式的电子膨胀阀的结构。其中，图1示出根据本公开的第一优选实施方式的电子膨胀阀的纵向剖视图。
根据本公开的电子膨胀阀1可以包括：用于对流过电子膨胀阀1的流体的流量进行调节的阀组件10；用于带动阀组件10的可动阀构件11同时进行旋转运动和轴向运动的执行机构50；以及为执行机构50提供动力的驱动机构40。
在优选的示例中，阀组件10包括导流腔组件12，导流腔组件12包括外壳从而限定用于容置阀组件10的可动阀构件11的内部空间，并且导流腔组件12还包括与入流管92连接的流体入口121以及与出流管94连接的流体出口122。流体经由入流管92流入电子膨胀阀1，然后经由出流管94流出电子膨胀阀1。
在优选的示例中，导流腔组件12还包括阀座18，流体出口122设置在阀座18中。
如上文所提及，可动阀构件11在执行机构50的带动下进行旋转运动和轴向运动，从而使得可动阀构件11能够打开和关闭阀座18中的流体出口122并且能够调节电子膨胀阀1的阀开度。可动阀构件11可以包括第一端(上端)141和第二端(下端)142，第一端141用于与下文将做详细描述的心轴51连接，第二端142用于与阀座18接合从而关闭流体出口122。
在图示的示例中，驱动机构40可以是包括定子41和转子42的电机。转子42可以在定子41中旋转，转子42与执行机构50的心轴51注塑成一体，从而使得当驱动机构(电机)40通电时转子42与心轴51一体地旋转。然而，本领域技术人员应当理解，转子42与心轴51也可以单独地形成，然后再通过适当的方式固定地连接在一起。转子42实施为一端开口的圆筒状磁环，转子42与定子41之间设置有筒状壳体421，从而限定出转子腔422，定子41固定至筒状壳体421外部，转子42和心轴51均设置在转子腔422中并能够相对于筒状壳体421和定子41进行轴向运动，将在下文对此做详细描述。
此外，筒状壳体421固定连接至导流腔组件12的外壳，并且筒状壳体421和导流腔组件12均相对于电子膨胀阀1的机壳固定。
优选地，电子膨胀阀1还可以包括具有内螺纹的保持构件60，保持构件60固定至筒状壳体421的一端并且为心轴51提供支承，具体地，心轴51可以包括第一端(上端)511和第二端(下端)512。第一端511形成有外螺纹并且与具有内螺纹的保持构件60螺纹配合连接，第二端512用于与可动阀构件11的第一端141连接，或者心轴51也可以与可动阀构件11一体成型。从而在转子42与心轴51一体地旋转时，通过心轴51与保持构件60之间的螺纹配合而促使转子42与心轴51同时进行轴向运动，从而实现转子42与心轴51在进行旋转运动的同时做轴向运动，并且经由心轴51的带动，可动阀构件11也在进行旋转运动的同时做轴向运动。
下面将结合附图1-3b详细描述根据本公开的第一优选实施方式的电子膨胀阀的止位机构。其中，图2a和图2b示出图1中的电子膨胀阀的局部放大的剖视图，其中详细示出了可动阀构件及其止位机构的构型；图2a和图2b示出了图1中的止位机构的两种止位状态，其中，图2a示出了流体出口被封闭的止位状态；图2b示出了流体出口被打开的止位状态；图3a示出了图1中的止位机构的动止位件的放大的示意图；图3b示出了图1中的止位机构的静止位件的放大的示意图。
在如图所示的示例性实施方式中，止位机构包括两个动止位件191——第一动止位件1911和第二动止位件1912——以及两个静止位件——第一静止位件1921和第二静止位件1922，所述两个动止位件191设置在可动阀构件11上并随着可动阀构件11一起进行旋转运动和轴向运动，所述两个静止位件设 置于导流腔组件12上并且构造为能够与所述两个动止位件191分别周向抵接以限制可动阀构件11的轴向运动的范围。优选地，导流腔组件12包括导向套123，导向套123构造成与可动阀构件11间隙配合并对可动阀构件11的轴向运动进行导向，并且第一静止位件1921和第二静止位件1922均设置在导向套123上。
参照图2a和图2b可知，当第一动止位件1911与第一静止位件1921周向抵接时，阀针14的第二端142封闭阀座18的流体出口122；当第二动止位件1912与第二静止位件1922周向抵接时，阀针14的第二端142与阀座18的距离达到最大值，即，流体出口122的开度达到最大值。
如图中所示，动止位件191和静止位件可以是独立的插销状的构件，并且在可动阀构件11上设置相应的插孔来接纳各个动止位件191，在导向套123上设置相应的插孔来接纳各个静止位件。然而本公开不限于此，各个动止位件191也可以与可动阀构件11一体成型或者通过焊接、粘合、卡合、插接等任何合适的方式固定至可动阀构件11，并且各个静止位件可以与导向套123一体成型或者通过焊接、粘合、卡合、插接等任何合适的方式固定至导向套123或导流腔组件12的除了导向套123的其他部分处。
另外，图3a和图3b分别示出了动止位件191和静止位件的优选形状，其中，静止位件大致呈圆柱状，其一端具有倒角以便插入插孔中并形成过盈配合；动止位件191呈具有止位平面的大致圆柱状构件，当动止位件191抵接静止位件时，动止位件191的止位平面与静止位件接触，并且所述止位平面优选地形成为如图所示的平台部1910，平台部1910用于与静止位件的圆柱面进行周向抵接。然而，本公开并不限于此，根据实际应用，动止位件191和静止位件可以具有任何其他合适的形状，只要能够实现动止位件191与静止位件的周向抵接即可。
下面将结合附图4-5b详细描述根据本公开的第二优选实施方式的电子膨胀阀的止位机构。其中，图4示出根据本公开的第二优选实施方式的电子膨胀阀的局部放大的剖视图，其中详细示出了可动阀构件及其止位机构的构型；图5a和图5b示出了图4中的止位机构的两种止位状态，其中，图5a示出了流体出口被封闭的止位状态；图5b示出了流体出口被打开的止位状态。
根据本公开的第二优选实施方式的电子膨胀阀与第一优选实施方式的电 子膨胀阀具有大体相同的构型，区别在于：第二优选实施方式的电子膨胀阀1的止位机构包括一个动止位件191以及两个静止位件——第一静止位件1921和第二静止位件1922，其中，所述一个动止位件191优选地设置在可动阀构件11的适当位置处，第一静止位件1921设置在导流腔组件12的下部阀座18处，第二静止位件1922设置在导向套123上。
当动止位件191与第一静止位件1921抵接时，阀针14的第二端142封闭阀座18的流体出口122；当动止位件191与第二静止位件1922抵接时，阀针14的第二端142与阀座18的距离达到最大值，即，流体出口122的开度达到最大值。
尽管在上述实施方式中以及附图中公开了各个动止位件和静止位件的具体设置位置，但是，不本公开不限于此，应当理解的是，根据实际应用需求等因素，本领域普通技术人员可以调整各个动止位件和静止位件的具体设置位置，以满足设备所需，例如，静止位件也可以不设置在导向套123上，而全部设置在导流腔组件12的除了导向套123之外的其他部分处，只要能实现本公开的技术目的即可，甚至，本公开的电子膨胀阀1也可以不包括导向套123。
并且，尽管在前述优选实施方式中，动止位件与静止位件设计为以周向抵接的方式来限制可动阀构件的轴向行程范围，但是，可行的是，也可以将动止位件和静止位件设计为以轴向抵接的方式来限制可动阀构件的轴向行程范围。
尽管在前述实施方式中描述了根据本公开的电子膨胀阀的示例性实施方式，但是，本公开并不限于此，在不背离本公开的保护范围的情况下，可以进行各种改型、替换和组合。
显而易见的是，通过将不同的实施方式及各个技术特征以不同的方式进行组合或者对其进行改型，可以进一步设计得出各种不同的实施方式。
上文结合具体实施方式描述了根据本公开的优选实施方式的电子膨胀阀。可以理解，以上描述仅为示例性的而非限制性的，在不背离本公开的范围的情况下，本领域技术人员参照上述描述可以想到多种变型和修改。这些变型和修改同样包含在本公开的保护范围内。

Claims (10)

  1. 一种电子膨胀阀，所述电子膨胀阀包括：
    可动阀构件，所述可动阀构件的至少一部分设置在由导流腔组件限定的空间内，所述导流腔组件包括流体端口，所述可动阀构件用于封闭和打开所述流体端口；以及
    执行机构，所述执行机构用于驱动所述可动阀构件以在进行旋转运动的同时进行轴向运动，
    其中，所述电子膨胀阀还包括止位机构，所述止位机构包括动止位件和静止位件，
    其特征在于，所述动止位件设置在所述可动阀构件上并随着所述可动阀构件一起运动，所述静止位件设置在所述导流腔组件上并且构造为能够与所述动止位件抵接，由此限制所述可动阀构件的轴向运动的范围。
  2. 根据权利要求1所述的电子膨胀阀，其特征在于，所述止位机构包括一个所述动止位件和两个所述静止位件，所述止位机构构造成使得一个所述动止位件能够与两个所述静止位件分别抵接成：当所述动止位件与两个所述静止位件中的第一静止位件抵接时，所述可动阀构件封闭所述流体端口；当所述动止位件与两个所述静止位件中的第二静止位件抵接时，所述可动阀构件与所述流体端口的距离达到最大值。
  3. 根据权利要求2所述的电子膨胀阀，其特征在于，所述导流腔组件包括导向套，所述导向套构造成与所述可动阀构件间隙配合并对所述可动阀构件的轴向运动进行导向，并且两个所述静止位件中的仅一个设置在所述导向套上。
  4. 根据权利要求3所述的电子膨胀阀，其特征在于，两个所述静止位件中的另一个设置在所述导流腔组件的限定所述流体端口的阀座上或所述导流腔组件的外壳部分。
  5. 根据权利要求1所述的电子膨胀阀，其特征在于，所述止位机构包括两个所述动止位件和两个所述静止位件，所述止位机构构造成使得两个所述动止位件能够与两个所述静止位件分别抵接成：当两个所述动止位件中的第一动止位件与两个所述静止位件中的第一静止位件抵接时，所述可动阀构件封闭所述流体端口；当两个所述动止位件中的第二动止位件与两个所述静止位件中的第二静止位件抵接时，所述可动阀构件与所述流体端口的距离达到最大值。
  6. 根据权利要求5所述的电子膨胀阀，其特征在于，所述导流腔组件包括导向套，所述导向套构造成与所述可动阀构件间隙配合并对所述可动阀构件的轴向运动进行导向，并且两个所述静止位件均设置在所述导向套上。
  7. 根据权利要求1至6中任一项所述的电子膨胀阀，其特征在于，所述动止位件和所述静止位件构造成能够沿所述可动阀构件的旋转运动的周向方向彼此抵接。
  8. 根据权利要求1至6中任一项所述的电子膨胀阀，其特征在于，所述动止位件与所述可动阀构件一体成型或者通过焊接、粘合、卡合或插接的方式固定至所述可动阀构件，所述静止位件与所述导流腔组件一体成型或者通过焊接、粘合、卡合或插接的方式固定至所述导流腔组件。
  9. 根据权利要求1至6中任一项所述的电子膨胀阀，其特征在于，
    所述导流腔组件包括阀座，所述流体端口设置在所述阀座中，所述可动阀构件的一端用于与所述阀座接合从而封闭所述流体端口，并且
    所述执行机构包括心轴，所述心轴固定地连接至所述可动阀构件并带动所述可动阀构件在进行旋转运动的同时进行轴向运动。
  10. 根据权利要求1至6中任一项所述的电子膨胀阀，其特征在于，所述可动阀构件为一体式结构。
PCT/CN2020/108801 2019-09-06 2020-08-13 电子膨胀阀 WO2021042955A1 (zh)

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