WO2023103648A1 - 电磁阀及具有其的空调系统 - Google Patents

电磁阀及具有其的空调系统 Download PDF

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Publication number
WO2023103648A1
WO2023103648A1 PCT/CN2022/128684 CN2022128684W WO2023103648A1 WO 2023103648 A1 WO2023103648 A1 WO 2023103648A1 CN 2022128684 W CN2022128684 W CN 2022128684W WO 2023103648 A1 WO2023103648 A1 WO 2023103648A1
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WO
WIPO (PCT)
Prior art keywords
positioning sleeve
port
valve
piston
core
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PCT/CN2022/128684
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English (en)
French (fr)
Inventor
金勇�
张炼
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浙江盾安人工环境股份有限公司
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Publication of WO2023103648A1 publication Critical patent/WO2023103648A1/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
    • 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

Definitions

  • the present application relates to the technical field of refrigeration equipment, in particular to a solenoid valve and an air-conditioning system having the same.
  • Solenoid valve is an electromagnetically controlled component, which is used in industrial control systems to control the on-off of the medium, or to adjust the flow direction and flow of the medium and other parameters, so as to achieve the desired control.
  • the positioning sleeve usually has an interference fit with the wall of the installation cavity, resulting in the risk of failure of the solenoid valve.
  • a solenoid valve is provided.
  • the application provides a solenoid valve, including a valve body and a piston, the valve body is provided with a main valve port, the piston is arranged in the valve body, and the piston can move in the valve body to open/close Close the main valve port; the piston is provided with an installation cavity, and the installation cavity is provided with a check valve core, a positioning sleeve and a fixing unit, and the positioning sleeve is fixed in the installation cavity by the fixing unit , the one-way valve core can move in the installation cavity and abut against the positioning sleeve.
  • the fixing unit includes an internal thread and an external thread
  • the internal thread is provided on the cavity wall of the installation cavity
  • the external thread is provided on the external wall of the positioning sleeve
  • the external thread Cooperate with the internal thread when the positioning sleeve is installed in the installation cavity.
  • an operating part is provided at the end of the positioning sleeve away from the one-way valve core, and the operating part cooperates with an external tool to screw in/out the positioning sleeve.
  • the operation part includes a slot or a cross slot, and the slot or the cross slot is opened at the end of the positioning sleeve away from the one-way valve core; or, the operation part It includes an inner hexagonal groove, and the inner hexagonal groove is opened at the end of the positioning sleeve away from the one-way valve core.
  • a dovetail groove is opened on the wall of the installation cavity, and the distance from the groove wall of the dovetail groove to the central axis of the installation cavity gradually increases from the direction of the one-way valve core toward the positioning sleeve. Increased; the positioning sleeve is set away from the one end of the one-way valve core to be flared.
  • the end of the dovetail groove close to the one-way valve core has a stepped surface, and the end of the positioning sleeve close to the one-way valve core abuts against the stepped surface.
  • the end of the dovetail groove away from the step surface is provided with a barb portion, and the end of the positioning sleeve away from the one-way valve core abuts against the Barb Department.
  • the end of the piston away from the main valve port is provided with a piston cavity
  • the one-way valve core includes a valve core cavity
  • the one-way valve core realizes the one-way connection between the piston cavity and the valve core cavity.
  • the positioning sleeve is provided with a through hole, and the through hole communicates with the spool chamber.
  • a second spring is provided in the piston cavity, and a cover plate is provided on the sealing cover of the valve body away from the end of the main valve port, and the two ends of the second spring respectively abut against the The cover plate and the cavity wall of the piston cavity.
  • a pilot valve is installed on the valve body, and the pilot valve includes a sleeve and a moving iron core assembly installed in the sleeve, and the valve body is also provided with a The pilot valve port connected with the port, the moving iron core assembly can move in the casing and open/close the pilot valve port; the valve body is also provided with a flow channel connected with the piston chamber, when the When the pilot valve port is opened, the pilot valve port communicates with the piston cavity through the flow channel.
  • a static iron core is installed in the sleeve
  • the moving iron core assembly includes a moving iron core, a first spring and a pilot valve core, and the two ends of the first spring respectively abut against the
  • the static iron core and the moving iron core, the pilot valve core is connected to the end of the moving iron core away from the static iron core, and the moving iron core can move in the casing and drive the pilot valve core to disengage /Abut against the pilot valve port to open/close the pilot valve port.
  • the end surface and the side surface of the valve body are respectively provided with a first flow port and a second flow port communicating with the main valve port and the pilot valve port, and the axis of the first flow port is parallel to the axis of the pilot valve, the axis of the second flow port is parallel to the axis of the piston, and when the main valve port is opened, the first flow port and the second flow port communicate with each other; when the main valve port is closed, cut off the communication between the first communication port and the second communication port.
  • the present application also provides an air conditioning system, including the above-mentioned solenoid valve.
  • Fig. 1 is a schematic structural diagram of a solenoid valve according to one or more embodiments.
  • Figure 2 is a schematic diagram of the structure of an embodiment of a piston according to one or more embodiments.
  • FIG. 3 is a partially enlarged schematic diagram of A in FIG. 2 .
  • Fig. 4 is a schematic structural view of another embodiment of a piston according to one or more embodiments.
  • FIG. 5 is a partially enlarged schematic diagram of part B in FIG. 4 .
  • Fig. 6 is a schematic structural diagram of an air conditioning system according to one or more embodiments.
  • the solenoid valve 100 is an industrial equipment controlled by solenoid, and is an automatic basic component used to control fluids. It belongs to actuators and is not limited to hydraulic, pneumatic and other fields.
  • the solenoid valve 100 is used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium.
  • the solenoid valve 100 can cooperate with different circuits to realize expected control, and the control accuracy and flexibility can be guaranteed.
  • the positioning sleeve usually has an interference fit with the wall of the installation cavity, resulting in the risk of failure of the solenoid valve.
  • the application provides a solenoid valve 100, including a valve body 10 and a piston 20, the valve body 10 is provided with a main valve port 11, and the piston 20 is arranged in the valve body 10 , and the piston 20 can move in the valve body 10 to open/close the main valve port 11 .
  • the piston 20 is provided with an installation chamber 21, and the installation chamber 21 is provided with a one-way valve core 30, a positioning sleeve 40 and a fixing unit 50, and the positioning sleeve 40 is fixed in the installation chamber 21 through the fixing unit 50, and the one-way valve core 30 can Move in the installation cavity 21 and abut against the positioning sleeve 40 .
  • the positioning sleeve 40 is fixed in the installation cavity 21 by the fixing unit 50 , so as to fix and position the positioning sleeve 40 and prevent the positioning sleeve 40 from falling off from the installation cavity 21 .
  • a pilot valve 60 is installed on the valve body 10 .
  • the pilot valve 60 includes a sleeve 61, an electromagnetic coil is installed outside the sleeve 61, a static iron core 63 and a moving iron core assembly 62 are installed in the sleeve 61, the static iron core 63 is fixedly installed on one end of the sleeve 61, and the moving iron
  • the core assembly 62 includes a moving iron core 621, a first spring 623 and a pilot valve core 622. The two ends of the first spring 623 abut against the static iron core 63 and the moving iron core 621 respectively, and the pilot valve core 622 is connected to the moving iron core 621 away from Static iron core 63 one ends.
  • the valve body 10 is also provided with a pilot valve port 12 , the moving iron core 621 can move in the casing 61 and drive the pilot valve core 622 to disengage/contact the pilot valve port 12 to open/close the pilot valve port 12 .
  • the end of the piston 20 away from the main valve port 11 is provided with a piston chamber 22, and the piston chamber 22 is provided with a second spring 221, and the end of the valve body 10 away from the main valve port 11 is sealed with a cover plate 14, and the second spring 221 The two ends of each abut against the cover plate 14 and the cavity wall of the piston cavity 22 respectively.
  • the one-way spool 30 includes a spool cavity 31 , and the one-way spool 30 can realize the one-way communication of the medium from the piston cavity 22 to the spool cavity 31 .
  • the valve body 10 is also provided with a flow channel 13 communicating with the piston cavity 22 , when the pilot valve port 12 is opened, the pilot valve port 12 communicates with the piston cavity 22 through the flow channel 13 .
  • a first flow port 15 and a second flow port 16 communicating with the main valve port 11 and the pilot valve port 12 are respectively opened on the end surface and the side surface of the valve body 10 .
  • the axis of the first communication port 15 is parallel to the axis of the pilot valve 60
  • the axis of the second communication port 16 is parallel to the axis of the piston 20 .
  • the solenoid valve 100 provided in this application can realize two-way flow.
  • a thrust force is applied to the piston 20 to move toward the cover plate 14 , the piston 20 is separated from the main valve port 11 , and the second spring 221 is in a compressed state.
  • the main valve port 11 is opened, and the refrigerant can flow from the second flow port 16 to the first flow port 15, but generally speaking, after a while, the piston 20 will slowly move toward Move away from the cover plate 14 and abut against the main valve port 11 to cut off the communication between the first flow port 15 and the second flow port 16 .
  • a check valve core 30 is provided on the piston 20 .
  • the electromagnetic coil is energized, and the moving iron core 621 moves toward the static iron core 63 under the attractive force of the static iron core 63, and the pilot valve core 622 is separated from the pilot valve port 12 under the drive of the moving iron core 621, At this time, the pilot valve port 12 is opened, and part of the refrigerant flows from the pilot valve port 12 into the circulation channel 13 , and then flows into the piston cavity 22 through the gap between the piston 20 and the cover plate 14 .
  • the refrigerant can push the one-way valve core 30 away at this time, and the positioning sleeve 40 is provided with a through hole 42 that communicates with the valve core cavity 31, and the through hole 42 communicates with the first flow port. 15. It can be understood that, the through hole 42 communicates with the valve core cavity 31 to facilitate the circulation of the refrigerant. The refrigerant can flow out from the through hole 42 to the first flow port 15 through the spool chamber 31.
  • This process is a continuous pressure relief process, so that the pressure in the piston chamber 22 is always lower than the pressure of the refrigerant in the second flow port 16, so The piston 20 can always overcome the restoring force of the second spring 221 and move towards the direction of the cover plate 14 , thus achieving continuous communication between the first communication port 15 and the second communication port 16 .
  • the electromagnetic coil When the refrigerant flows into the valve body 10 from the first flow port 15, the electromagnetic coil is energized, and the moving iron core 621 moves toward the static iron core 63 under the action of the attractive force of the static iron core 63, and the pilot valve core 622 Driven by the core 621, the pilot valve port 12 is separated, and the pilot valve port 12 is opened at this time.
  • the second flow port 16 realizes continuous pressure relief in the piston cavity 22; on the other hand, because the gap between the piston 20 and the inner wall of the valve body 10 is particularly small, that is to say, the sliding of the piston 20 in the valve body 10 can realize a similar Because of the damping effect, the damping force needs to be overcome to drive the piston 20 to slide on the inner wall of the valve body 10, that is, when the pressure difference change value on one side of the piston 20 is large enough to overcome the damping force, the piston 20 will slide .
  • the pressure difference of the piston chamber 22 through the pilot valve port 12 is always greater than the pressure difference compensated to the piston chamber 22 by the relative sliding between the piston 20 and the inner wall of the valve body 10, that is, the pressure relief on the left side of the piston 20
  • the pressure difference can overcome the damping force between the piston 20 and the inner wall of the valve body 10.
  • the piston 20 moves toward the cover plate 14, the main valve port 11 is opened, and the refrigerant can flow from the first flow port 15 to the second flow port 16.
  • the positioning sleeve 40 for the position limitation of the core 30 can abut against the positioning sleeve 40 during the movement of the one-way valve core 30 in the installation cavity 21 , so as to prevent the one-way valve core 30 from falling off from the installation cavity 21 .
  • the positioning sleeve in the traditional solenoid valve is connected with the cavity wall of the installation cavity by way of interference fit, which often has the risk of failure.
  • the present application provides a fixing method for the positioning sleeve 40 to avoid the situation that the positioning sleeve 40 falls off and fails.
  • the positioning sleeve 40 provided by the present application is cylindrical, when the positioning sleeve 40 is installed in the installation cavity 21, the contact area between the end walls of the two ends of the positioning sleeve 40 and the wall of the installation cavity 21 larger, and the contact is more stable and uniform, and it is less likely to cause the problem that the positioning sleeve 40 falls off from the installation cavity 21 .
  • the fixing unit 50 includes an internal thread 51 and an external thread 52 .
  • the internal thread 51 is arranged on the cavity wall of the installation cavity 21, and the external thread 52 is arranged on the outer wall surface of the positioning sleeve 40.
  • the external thread 52 and the internal thread 51 cooperate with each other when the positioning sleeve 40 is installed in the installation cavity 21, thereby completing the positioning sleeve.
  • the fixing of the positioning sleeve 40 prevents the positioning sleeve 40 from falling off from the installation cavity 21. . That is to say, the method of installing the positioning sleeve 40 in the installation cavity 21 adopts the method of screw connection, which has higher fixing performance than the method of interference fit, and is less likely to fall off and fail.
  • an operating part 41 is provided at the end of the positioning sleeve 40 away from the one-way valve core 30, and the operating part 41 cooperates with an external tool to screw the positioning sleeve 40. / unscrew.
  • the operation part 41 includes a slot or an inner hexagonal slot, and the slot or an inner hexagonal slot is opened on the end of the positioning sleeve 40 away from the one-way valve core 30 to facilitate the insertion of the external tool into the slot or the inner hexagonal slot. Tighten/loosen the positioning sleeve 40.
  • the operating part 41 can also be a cross recess, which can be operated with a Phillips screwdriver.
  • the operating portion 41 By setting the operating portion 41 at the end of the positioning sleeve 40 away from the one-way valve core 30 , it is convenient to operate the positioning sleeve 40 through the operating portion 41 by an external tool.
  • the degree of close fit between the internal thread 51 and the external thread 52 can be further increased on the basis of the screw connection of the positioning sleeve 40 to the installation cavity 21 ; on the other hand, the disassembly and maintenance of the positioning sleeve 40 can also be facilitated.
  • a dovetail groove 211 is provided on the wall of the installation cavity 21, and the dovetail groove 211 and the installation cavity 21 are arranged on the same axis, and the groove wall of the dovetail groove 211 reaches the installation cavity 21.
  • the distance of the central axis gradually increases from the one-way valve core 30 toward the positioning sleeve 40 .
  • the end of the dovetail groove 211 close to the one-way valve core 30 has a stepped surface 2111.
  • the end of the positioning sleeve 40 close to the one-way valve core 30 abuts on the stepped surface 2111, so that the stepped surface 2111
  • the installation of the positioning sleeve 40 is positioned and limited.
  • the end of the positioning sleeve 40 close to the one-way valve core 30 is abutted on the step surface 2111, the end of the positioning sleeve 40 far away from the one-way valve core 30 is expanded to further fix and limit the positioning sleeve 40 to avoid The positioning sleeve 40 falls off.
  • the expansion of the positioning sleeve 40 is performed, that is, the positioning sleeve 40 is originally cylindrical, and then put into the dovetail groove 211 and then expanded. , so processing is more convenient.
  • the cavity wall of the installation cavity 21 can relatively form a barb portion 2112 .
  • the wall of the installation cavity 21 can also be pressed inward toward the end of the positioning sleeve 40 away from the one-way valve core 30 to form a barb portion 2112, the purpose of which is to allow the end of the positioning sleeve 40 away from the one-way valve core 30 to abut against A limit is formed on the barb portion 2112 , which further increases the fixing performance of the positioning sleeve 40 in the dovetail groove 211 , and prevents the positioning sleeve 40 from falling off and failing.
  • the present application provides an air conditioning system 200 including a solenoid valve 100 .
  • the air conditioning system 200 also includes the same advantages as the solenoid valve 100 described above.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

一种电磁阀(100)及具有其的空调系统(200)。该电磁阀(100)包括阀体(10)和活塞(20)，阀体(10)上开设有主阀口(11)，活塞(20)设置于阀体(10)内，且活塞(20)能够在阀体(10)内运动，以启/闭主阀口(11)；活塞(20)上开设有安装腔(21)，安装腔(21)内设有单向阀芯(30)、定位套(40)和固定单元(50)，定位套(40)通过固定单元(50)固定于安装腔(21)内，单向阀芯(30)能够在安装腔(21)内运动并抵靠于定位套(40)上。

Description

电磁阀及具有其的空调系统
相关申请
本申请要求2021年12月7日申请的，申请号为202123073715.4，发明名称为“电磁阀及具有其的空调系统”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
本申请涉及制冷设备技术领域，特别是涉及一种电磁阀及具有其的空调系统。
背景技术
电磁阀是一种由电磁控制的元器件，用在工业控制系统中控制介质的通断，或调整介质的流向和流量等参数，从而实现预期的控制。
相关技术的电磁阀中，定位套通常与安装腔腔壁过盈配合，导致电磁阀往往存在失效风险。
发明内容
根据本申请的各种实施例，提供了一种电磁阀。
本申请提供一种电磁阀，包括阀体和活塞，所述阀体上开设有主阀口，所述活塞设置于所述阀体内，且所述活塞能够在所述阀体内运动，以启/闭所述主阀口；所述活塞上开设有安装腔，所述安装腔内设有单向阀芯、定位套和固定单元，所述定位套通过所述固定单元固定于所述安装腔内，所述单向阀芯能够在所述安装腔内运动并抵靠于所述定位套上。
在其中一个实施例中，所述固定单元包括内螺纹和外螺纹，所述内螺纹设置于所述安装腔的腔壁，所述外螺纹设置于所述定位套的外壁面，所述外螺纹和所述内螺纹随所述定位套安装于所述安装腔而互相配合。
在其中一个实施例中，所述定位套远离所述单向阀芯一端设有操作部，所述操作部与外置的工具配合以对所述定位套进行旋入/旋出。
在其中一个实施例中，所述操作部包括一字槽或十字槽，所述一字槽或所述十字槽开设于所述定位套远离所述单向阀芯一端；或者，所述操作部包括内六角槽，所述内六角槽开设于所述定位套远离所述单向阀芯一端。
在其中一个实施例中，所述安装腔腔壁上开设有燕尾槽，所述燕尾槽的槽壁到所述安装腔中轴线的距离自所述单向阀芯朝向所述定位套的方向逐渐增大；所述定位套远离所述单向阀芯一端外扩口设置。
在其中一个实施例中，所述燕尾槽靠近所述单向阀芯一端具有台阶面，所述定位套靠近所述单向阀芯一端抵接于所述台阶面上。
在其中一个实施例中，所述燕尾槽远离台阶面一端设有倒钩部，所述定位套远离所述单向阀芯一端随所述定位套安装于所述燕尾槽而抵接于所述倒钩部。
在其中一个实施例中，所述活塞远离主阀口一端开设有活塞腔，所述单向阀芯包括阀芯腔，所述单向阀芯实现所述活塞腔到所述阀芯腔的单向流通，所述定位套上开设有通孔，且所述通孔与所述阀芯腔相连通。
在其中一个实施例中，所述活塞腔内设有第二弹簧，所述阀体远离所述主阀口一端密封的盖设有盖板，所述第二弹簧的两端分别抵接于所述盖板和所述活塞腔的腔壁。
在其中一个实施例中，所述阀体上安装有导阀，所述导阀包括套管和安 装于所述套管内的动铁芯组件，所述阀体上还开设有与所述主阀口连通的导阀口，所述动铁芯组件能够在所述套管内运动并启/闭所述导阀口；所述阀体上还设有与所述活塞腔连通的流通通道，当所述导阀口开启时，所述导阀口通过所述流通通道与所述活塞腔相连通。
在其中一个实施例中，所述套管内安装有静铁芯，所述动铁芯组件包括动铁芯、第一弹簧和导阀芯，所述第一弹簧的两端分别抵接于所述静铁芯和所述动铁芯，所述导阀芯连接于所述动铁芯远离所述静铁芯一端，所述动铁芯能够在所述套管内运动并带动所述导阀芯脱离/抵接所述导阀口，以启/闭所述导阀口。
在其中一个实施例中，所述阀体的端面和侧面分别开设有第一流通口和与所述主阀口及所述导阀口连通的第二流通口，所述第一流通口的轴线与所述导阀的轴线相平行，所述第二流通口的轴线和所述活塞的轴线相平行，当所述主阀口开启时，所述第一流通口和所述第二流通口之间互相流通；当所述主阀口关闭时，切断所述第一流通口和所述第二流通口之间的流通。
本申请还提供一种空调系统，包括如上所述的电磁阀。
本申请的一个或多个实施例的细节在下面的附图和描述中提出。本申请的其它特征、目的和优点将从说明书、附图以及权利要求书变得明显。
附图说明
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
图1为根据一个或多个实施例的电磁阀的结构示意图。
图2为根据一个或多个实施例的活塞一实施方式的结构示意图。
图3为图2中A处局部放大示意图。
图4为根据一个或多个实施例的活塞另一实施方式的结构示意图。
图5为图4中B处局部放大示意图。
图6为根据一个或多个实施例的空调系统的结构示意图。
图中各符号表示含义如下：
100、电磁阀；10、阀体；11、主阀口；12、导阀口；13、流通通道；14、盖板；15、第一流通口；16、第二流通口；20、活塞；21、安装腔；211、燕尾槽；2111、台阶面；2112、倒钩部；22、活塞腔；221、第二弹簧；30、单向阀芯；31、阀芯腔；40、定位套；41、操作部；42、通孔；50、固定单元；51、内螺纹；52、外螺纹；60、导阀；61、套管；62、动铁芯组件；621、动铁芯；622、导阀芯；623、第一弹簧；63、静铁芯；200、空调系统。
具体实施方式
为使本申请的目的、技术方案及优点更加清楚明白，以下结合附图及具体实施方式，对本申请进行进一步的详细说明。应当理解的是，此处所描述的具体实施方式仅用以解释本申请，并不限定本申请的保护范围。
需要说明的是，当组件被称为“安装于”另一个组件，它可以直接在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“设置于”另一个组件，它可以是直接设置在另一个组件上或者可能同时存在居中组件。当一个组件被认为是“固定于”另一个组件，它可以是直接固定在另一个组件上或者可能同时存在居中组件。本申请所使用的术语“垂直的”、“水平 的”、“左”、“右”以及类似的表述只是为了说明的目的，并不表示是唯一的实施方式。
除非另有定义，本申请所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。本申请所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
请参考图1至图5，电磁阀100是由电磁控制的工业设备，是用来控制流体的自动化基础元件，属于执行器，并不限于液压、气动等领域。电磁阀100用在工业控制系统中调整介质的方向、流量、速度和其他的参数。电磁阀100可以配合不同的电路来实现预期的控制，而控制的精度和灵活性都能够得到保证。
相关技术的电磁阀中，定位套通常与安装腔腔壁过盈配合，导致电磁阀往往存在失效风险。
为解决相关技术的电磁阀中所存在的问题，本申请提供了一种电磁阀100，包括阀体10和活塞20，阀体10上开设有主阀口11，活塞20设置于阀体10内，且活塞20能够在阀体10内运动，以启/闭主阀口11。活塞20上开设有安装腔21，安装腔21内设有单向阀芯30、定位套40和固定单元50，定位套40通过固定单元50固定于安装腔21内，单向阀芯30能够在安装腔21内运动并抵靠于定位套40上。
需要说明的是，本申请通过使得定位套40通过固定单元50固定于安装腔21内，从而对定位套40进行固定和限位，防止定位套40从安装腔21内脱落。
如图1所示，阀体10上安装有导阀60。导阀60包括套管61，套管61 外安装有电磁线圈，套管61内安装有静铁芯63和动铁芯组件62，静铁芯63固定安装于套管61内的一端，动铁芯组件62包括动铁芯621、第一弹簧623和导阀芯622，第一弹簧623的两端分别抵接于静铁芯63和动铁芯621，导阀芯622连接于动铁芯621远离静铁芯63一端。阀体10上还开设有导阀口12，动铁芯621能够在套管61内运动并带动导阀芯622脱离/抵接导阀口12，以启/闭导阀口12。
进一步地，活塞20远离主阀口11一端开设有活塞腔22，活塞腔22内设有第二弹簧221，阀体10远离主阀口11一端密封地盖设有盖板14，第二弹簧221的两端分别抵接于盖板14和活塞腔22的腔壁。单向阀芯30包括阀芯腔31，单向阀芯30能够实现介质由活塞腔22到阀芯腔31的单向流通。阀体10上还设有与活塞腔22连通的流通通道13，当导阀口12开启时，导阀口12通过流通通道13与活塞腔22相连通。
具体地，阀体10的端面和侧面分别开设有第一流通口15和与主阀口11及导阀口12连通的第二流通口16。第一流通口15的轴线与导阀60的轴线相平行，第二流通口16的轴线和活塞20的轴线相平行。当主阀口11开启时，第一流通口15和第二流通口16之间互相流通；当主阀口11关闭时，切断第一流通口15和第二流通口16之间的流通。
本申请中提供的电磁阀100可以实现双向流通。当制冷剂从第二流通口16流入阀体10中，对活塞20施加朝向盖板14方向移动的推力，活塞20脱离主阀口11，第二弹簧221处于压缩状态。此时主阀口11开启，制冷剂能够从第二流通口16流向第一流通口15，但是一般来说过段时间，活塞20在第二弹簧221的回复力作用下又会慢慢的朝向远离盖板14的方向运动并且抵靠于主阀口11处，切断第一流通口15和第二流通口16之间的流通。为了实现 主阀口11开启时，第一流通口15和第二流通口16之间的持续连通，在活塞20上设置有单向阀芯30。当主阀口11开启时，电磁线圈通电，动铁芯621在静铁芯63的吸引力作用下朝向静铁芯63运动，导阀芯622在动铁芯621的带动下脱离导阀口12，此时导阀口12开启，部分制冷剂从导阀口12流入流通通道13，再通过活塞20与盖板14之间的间隙流入活塞腔22内。由于活塞腔22和安装腔21连通，此时制冷剂能将单向阀芯30顶开，定位套40上开设有与阀芯腔31相连通的通孔42，通孔42连通第一流通口15。可以理解的是，通过所述通孔42与所述阀芯腔31相连通，便于所述制冷剂的流通。制冷剂能够通过阀芯腔31从通孔42流出至第一流通口15，该过程为一个持续泄压过程，使得活塞腔22内的压力始终小于第二流通口16中制冷剂的压力，因此活塞20便能够一直克服第二弹簧221的回复力朝向盖板14的方向运动，这样便就实现了第一流通口15和第二流通口16之间的持续连通。
当制冷剂从第一流通口15中流入阀体10内时，将电磁线圈通电，动铁芯621在静铁芯63的吸引力作用下朝向静铁芯63运动，导阀芯622在动铁芯621的带动下脱离导阀口12，此时导阀口12开启，一方面，活塞腔22内的制冷剂通过流通通道13流至导阀口12处，再从导阀口12流至第二流通口16，实现活塞腔22内的持续泄压；另一方面，由于活塞20与阀体10内壁之间的缝隙特别小，也就是说活塞20在阀体10内的滑动可以实现具有类似于阻尼的效果，要驱动活塞20在阀体10内壁发生滑动需要克服该阻尼力，也即，当活塞20某一侧的压差变化值足够大至能克服该阻尼力时，活塞20发生滑动。即在示例图1中，活塞腔22通过导阀口12泄压的压差始终大于通过活塞20与阀体10内壁的相对滑动补偿给活塞腔22的压差，也即活塞20左侧泄压的压差能够克服活塞20与阀体10内壁之间的阻尼力，在压差的作 用下活塞20朝向盖板14的方向运动，主阀口11开启，制冷剂便能够从第一流通口15流向第二流通口16。
需要知道的是，单向阀芯30在安装腔21内的往复运动过程中，必然会容易出现脱离安装腔21的风险，因此在本实施方式中在安装腔21内安装用于对单向阀芯30进行限位的定位套40，单向阀芯30在安装腔21内运动过程中能够抵接于定位套40上，避免单向阀芯30从安装腔21中脱落。
进一步地，传统的电磁阀中定位套与安装腔的腔壁采用过盈配合的方式连接，经常容易存在失效的风险。基于此问题，本申请为定位套40提供了一种定位套40的固定方式，避免出现定位套40脱落失效的情况。
需要说明的是，由于本申请提供的定位套40呈圆筒状，因此定位套40安装于安装腔21中时，定位套40的两端的端壁与安装腔21腔壁的之间的接触面积更大，且接触更加稳定和均匀，也就更加不容易导致定位套40从安装腔21中脱落的问题。
如图2及图3所示，在一实施方式中，固定单元50包括内螺纹51和外螺纹52。内螺纹51设置于安装腔21的腔壁，外螺纹52设置于定位套40的外壁面，外螺纹52和内螺纹51随定位套40安装于安装腔21而互相配合，从而完成所述定位套40的固定，避免所述定位套40从所述安装腔21中脱落。。也就是说，定位套40安装于安装腔21的方式采用螺纹连接的方式，相比于过盈配合的方式固定性能更高，更加不容易脱落失效。
为了进一步增加定位套40安装于安装腔21中的紧固性，在定位套40远离单向阀芯30一端设置操作部41，操作部41与外置的工具配合以对定位套40进行旋入/旋出。具体地，操作部41包括一字槽或者内六角槽，一字槽或者内六角槽开设于定位套40远离单向阀芯30一端，用于方便外置工具伸入 一字槽或者内六角槽对定位套40进行旋紧/旋松。在其他实施例中，操作部41还可为十字槽，用十字螺丝刀即可操作。
通过在所述定位套40远离所述单向阀芯30一端设置操作部41，从而便于通过外置的工具通过所述操作部41对所述定位套40进行操作。一方面，能够在定位套40螺纹连接于安装腔21的基础上进一步增加内螺纹51和外螺纹52之间的紧密配合程度；另一方面，也能够方便对定位套40进行拆卸维修。
如图4及图5所示，在另一实施方式中，安装腔21腔壁上开设有燕尾槽211，燕尾槽211和安装腔21同中轴线设置，燕尾槽211的槽壁到安装腔21中轴线的距离自单向阀芯30朝向定位套40的方向逐渐增大。燕尾槽211靠近单向阀芯30一端具有台阶面2111，当定位套40安装于燕尾槽211中时，定位套40靠近单向阀芯30一端抵接于台阶面2111上，从而使得台阶面2111对定位套40的安装进行定位和限位。
将定位套40靠近单向阀芯30的一端抵接于台阶面2111上后，定位套40远离单向阀芯30的一端扩口设置，以对定位套40进行进一步的固定和限位，避免定位套40脱落。
在一些实施例中，将定位套40完全安装入燕尾槽211中后，再对定位套40扩口，即，定位套40原为圆筒状，再放入燕尾槽211中后进行扩口加工，如此加工更加方便。
具体地，由于定位套40远离单向阀芯30的一端外扩的过程能够相对地让安装腔21的腔壁形成倒钩部2112。当然，也可将安装腔21的腔壁朝向定位套40远离单向阀芯30的一端向内挤压形成倒钩部2112，目的是为了让定位套40远离单向阀芯30的一端抵接于倒钩部2112上形成限位，如此便进一 步地增加了定位套40在燕尾槽211内的固定性能，避免定位套40脱落失效。
本申请还提供一种技术方案：
如图6所示，本申请提供了一种空调系统200，包括电磁阀100。该空调系统200也包括跟上述电磁阀100同样的优点。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本申请的几种实施方式，其描述较为具体和详细，但并不能因此而理解为对实用新型专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干变形和改进，这些都属于本申请的保护范围。因此，本申请专利的保护范围应以所附权利要求为准。

Claims (13)

  1. 一种电磁阀，包括阀体和活塞，所述阀体上开设有主阀口，所述活塞设置于所述阀体内，且所述活塞能够在所述阀体内运动，以启/闭所述主阀口；
    其特征在于，所述活塞上开设有安装腔，所述安装腔内设有单向阀芯、定位套和固定单元，所述定位套通过所述固定单元固定于所述安装腔内，所述单向阀芯能够在所述安装腔内运动并抵靠于所述定位套上。
  2. 根据权利要求1所述的电磁阀，其中，所述固定单元包括内螺纹和外螺纹，所述内螺纹设置于所述安装腔的腔壁，所述外螺纹设置于所述定位套的外壁面，所述外螺纹和所述内螺纹随所述定位套安装于所述安装腔而互相配合。
  3. 根据权利要求2所述的电磁阀，其中，所述定位套远离所述单向阀芯一端设有操作部，所述操作部驱动所述定位套进行旋入/旋出。
  4. 根据权利要求3所述的电磁阀，其中，所述操作部包括一字槽或十字槽，所述一字槽或所述十字槽开设于所述定位套远离所述单向阀芯一端；
    或者，所述操作部包括内六角槽，所述内六角槽开设于所述定位套远离所述单向阀芯一端。
  5. 根据权利要求1所述的电磁阀，其中，所述安装腔腔壁上开设有燕尾槽，所述燕尾槽的槽壁到所述安装腔中轴线的距离自所述单向阀芯朝向所述定位套的方向逐渐增大；
    所述定位套远离所述单向阀芯一端外扩口设置。
  6. 根据权利要求5所述的电磁阀，其中，所述燕尾槽靠近所述单向阀芯一端具有台阶面，所述定位套靠近所述单向阀芯一端抵接于所述台阶面上。
  7. 根据权利要求5所述的电磁阀，其中，所述燕尾槽远离台阶面一端设有倒钩部，所述定位套远离所述单向阀芯一端随所述定位套安装于所述燕尾槽而抵接于所述倒钩部。
  8. 根据权利要求1所述的电磁阀，其中，所述活塞远离主阀口一端开设有活塞腔，所述单向阀芯包括阀芯腔，所述单向阀芯实现所述活塞腔到所述阀芯腔的单向流通，所述定位套上开设有通孔，且所述通孔与所述阀芯腔相连通。
  9. 根据权利要求8所述的电磁阀，其中，所述活塞腔内设有第二弹簧，所述阀体远离所述主阀口一端密封地盖设有盖板，所述第二弹簧的两端分别抵接于所述盖板和所述活塞腔的腔壁。
  10. 根据权利要求8所述的电磁阀，其中，所述阀体上安装有导阀，所述导阀包括套管和安装于所述套管内的动铁芯组件，所述阀体上还开设有与所述主阀口连通的导阀口，所述动铁芯组件能够在所述套管内运动并启/闭所述导阀口；
    所述阀体上还设有与所述活塞腔连通的流通通道，当所述导阀口开启时，所述导阀口通过所述流通通道与所述活塞腔相连通。
  11. 根据权利要求10所述的电磁阀，其中，所述套管内安装有静铁芯，所述动铁芯组件包括动铁芯、第一弹簧和导阀芯，所述第一弹簧的两端分别抵接于所述静铁芯和所述动铁芯，所述导阀芯连接于所述动铁芯远离所述静铁芯一端，所述动铁芯能够在所述套管内运动并带动所述导阀芯脱离/抵接所述导阀口，以启/闭所述导阀口。
  12. 根据权利要求10所述的电磁阀，其中，所述阀体的端面和侧面分别 开设有第一流通口和与所述主阀口及所述导阀口连通的第二流通口，所述第一流通口的轴线与所述导阀的轴线相平行，所述第二流通口的轴线和所述活塞的轴线相平行，当所述主阀口开启时，所述第一流通口和所述第二流通口之间互相流通；当所述主阀口关闭时，切断所述第一流通口和所述第二流通口之间的流通。
  13. 一种空调系统，其特征在于，包括如权利要求1-12任一项所述的电磁阀。
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