CN111022728B - Electronic expansion valve and thermal management assembly - Google Patents

Electronic expansion valve and thermal management assembly Download PDF

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Publication number
CN111022728B
CN111022728B CN201911179429.0A CN201911179429A CN111022728B CN 111022728 B CN111022728 B CN 111022728B CN 201911179429 A CN201911179429 A CN 201911179429A CN 111022728 B CN111022728 B CN 111022728B
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cavity
valve
sensor
electric control
electronic expansion
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CN201911179429.0A
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CN111022728A (en
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请求不公布姓名
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Zhejiang Sanhua Intelligent Controls Co Ltd
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Zhejiang Sanhua Intelligent Controls Co Ltd
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • 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

Abstract

The electronic expansion valve comprises a valve seat valve component and a control part, wherein the valve component comprises a valve core seat, a valve core and a rotor component, the valve core seat is provided with a valve port, the rotor component can drive the valve core to move relative to the valve core seat, the valve core can adjust the opening of the valve port relative to the valve core seat, the control part comprises a cover body, a stator component and an electric control plate, the stator component is electrically connected with the electric control plate and/or in signal connection, the electronic expansion valve further comprises a sensor, the control part is provided with a control cavity, the electric control plate is arranged in the control cavity, part of the sensor is positioned in the control cavity, the sensor is fixedly connected with the valve seat and positioned and is in butt joint with the electric control plate, the sensor is integrated in the electronic expansion valve to reduce pipeline arrangement, and the electronic expansion valve is relatively integrated.

Description

Electronic expansion valve and thermal management assembly
This document is filed as a divisional application of patent document with application number 201810801473. X.
Technical Field
The invention relates to the technical field of fluid control, in particular to a thermal management assembly and an electronic expansion valve.
Background
The refrigerating system comprises a compressor, an evaporator, a condenser and a throttling element, wherein an expansion valve is usually adopted as the throttling element, an electronic expansion valve is usually adopted as the throttling element for improving control accuracy, the electronic expansion valve is an electrically controllable device, a sensor is arranged on an outlet pipeline of the evaporator to collect relevant parameters of an outlet working medium of the evaporator, the sensor is connected with a control unit through a wire harness, and the control unit adjusts the opening of the electronic expansion valve according to a corresponding control program after obtaining the relevant parameters. Thus, the mechanical as well as electrical connections involved in the sensor result in a relatively complex structure.
Disclosure of Invention
The invention aims to provide an electronic expansion valve, which is beneficial to simplifying the structure.
An electronic expansion valve includes a valve member, a control portion, and a sensor; the valve component comprises a valve core seat, a valve core and a rotor assembly, wherein the valve core seat is provided with a valve port, the rotor assembly can drive the valve core to move relative to the valve core seat, and the valve core can adjust the opening of the valve port by moving relative to the valve core seat; the control part comprises a cover body, a stator assembly and an electric control plate, wherein the stator assembly is electrically connected and/or in signal connection with the electric control plate, the sensor is electrically connected and/or in signal connection with the electric control plate, and the stator assembly is sleeved on the periphery of the rotor assembly; the cover body is provided with at least part of control cavity, the electric control board is arranged in the control cavity, part of the sensor is arranged in the control cavity, and the sensor is abutted to the electric control board.
The electronic expansion valve is fixedly connected with the heat exchanger and comprises a valve seat, a valve component, a control part and a sensor, wherein the valve seat comprises a first mounting part and a second mounting part, the valve seat is provided with a first channel and a second channel, the first mounting part is provided with a first cavity, the second mounting part is provided with a second cavity, the first cavity is communicated with the first channel, the second cavity is communicated with the second channel, an opening of the first cavity and an opening of the second cavity are positioned on the same side of the valve seat, and an opening of the first cavity and an opening of the second cavity are positioned on a first side wall of the valve seat; the valve component comprises a valve core seat, a valve core and a rotor component, wherein the valve core seat is provided with a valve port, the rotor component can drive the valve core to move relative to the valve core seat so as to adjust the opening of the valve port, and at least part of the valve core seat is positioned in the first cavity; at least a portion of the sensor is located in the second cavity; the control part comprises a cover body, a stator assembly and an electric control plate, wherein the electric control plate is electrically connected and/or in signal connection with the stator assembly, the electric control plate is electrically connected and/or in signal connection with the sensor, at least one part of the cover body and the stator assembly are integrally injection molded, and the stator assembly is sleeved on the rotor assembly; the cover body is provided with at least part of control cavity, the electric control plate is arranged in the control cavity, the second cavity is communicated with the control cavity, the sensor is fixedly connected with the valve seat and positioned, and the sensor is abutted with the electric control plate; the valve seat comprises a first inlet, a second inlet, a first outlet and a second outlet, wherein a first channel is communicated with the first outlet and the first inlet, a second channel is communicated with the second outlet and the second inlet, the first outlet is communicated with the inlet of the heat exchanger, the second inlet is communicated with the outlet of the heat exchanger, and the inlet of the heat exchanger is communicated with the outlet of the heat exchanger through a third channel of the heat exchanger.
A thermal management assembly comprising an electronic expansion valve and a heat exchanger, the electronic expansion valve being fixedly connected to the heat exchanger, the electronic expansion valve comprising a valve member, a control portion and a sensor, the heat exchanger comprising a first mounting portion and a second mounting portion, the heat exchanger having a first channel and a second channel, the first mounting portion having a first cavity and the second mounting portion having a second cavity, the first cavity being in communication with the first channel, the second cavity being in communication with the second channel, the opening of the first cavity and the opening of the second cavity being on the same side of the heat exchanger, the opening of the first cavity and the opening of the second cavity being on a first side wall of the valve seat; the valve component comprises a valve core seat, a valve core and a rotor component, wherein the valve core seat is provided with a valve port, the rotor component can drive the valve core to move relative to the valve core seat so as to adjust the opening of the valve port, and at least part of the valve core seat is positioned in the first cavity; at least a portion of the sensor is located in the second cavity; the control part comprises a cover body, a stator assembly and an electric control plate, wherein the electric control plate is electrically connected and/or in signal connection with the stator assembly, the electric control plate is electrically connected and/or in signal connection with the sensor, at least one part of the cover body and the stator assembly are integrally injection molded, and the stator assembly is sleeved on the rotor assembly; the cover body is provided with at least part of control cavity, the electric control plate is arranged in the control cavity, the second cavity is communicated with the control cavity, the sensor is fixedly connected with the valve seat and positioned, and the sensor is abutted to the electric control plate.
The thermal management assembly comprises an electronic expansion valve, the electronic expansion valve comprises a sensor and a control part, the control part comprises an electric control plate, the sensor is electrically connected with a control plate and/or in signal connection and is in abutting connection, the sensor is directly in abutting connection with the control part without a wire harness, the circuit arrangement is relatively reduced, and the integration of a refrigerating system is facilitated.
Drawings
FIG. 1 is a schematic block diagram of one embodiment of a refrigeration system;
FIG. 2 is a schematic structural view of one embodiment of a thermal management assembly;
FIG. 3 is a schematic diagram of a three-dimensional structure of an electronic expansion valve in one direction in the present technical solution;
fig. 4 is a schematic view of another directional perspective structure of the electronic expansion valve in the present technical solution;
FIG. 5 is a schematic view of a sectional structure in the B-B direction of the electronic expansion valve of FIG. 3;
FIG. 6 is a schematic view of a cross-sectional structure in the C-C direction of the electronic expansion valve of FIG. 4;
FIG. 7 is a schematic view of a sectional structure of the electronic expansion valve in the direction A-A of FIG. 3;
FIG. 8 is an enlarged schematic view of a part of the structure of the portion D in FIG. 7;
FIG. 9 is a schematic perspective view of the valve seat of FIG. 3;
FIG. 10 is a schematic perspective view of the sensor of FIG. 6;
FIG. 11 is a schematic illustration of one of the assembly steps of the electronic expansion valve;
FIG. 12 is a schematic diagram of a second step of assembling an electronic expansion valve;
FIG. 13 is a schematic view of a third step of assembling the electronic expansion valve;
fig. 14 is a schematic cross-sectional structure of another embodiment of an electronic expansion valve.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The invention is further described with reference to the drawings and detailed description which follow:
fig. 1 is a schematic block diagram of an embodiment of a refrigeration system, which in this example includes an air conditioning system including a compressor 100, a condenser 200, a first electronic expansion valve 1, and an evaporator 300, and a battery cooling system; when the air conditioning system works, the refrigerant is compressed into high-temperature and high-pressure refrigerant through the compressor 100, the high-temperature and high-pressure refrigerant is cooled through the condenser 200 and then becomes normal-temperature and high-pressure refrigerant, and the normal-temperature and high-pressure refrigerant enters the evaporator 300 through the first electronic expansion valve 1; since the pressure of the refrigerant at normal temperature and high pressure is reduced after passing through the first electronic expansion valve 1, the refrigerant is vaporized to become a low-temperature refrigerant, and the low-temperature refrigerant absorbs a large amount of heat through the evaporator 300 to become a refrigerant and returns to the compressor 100; the battery cooling system includes a thermal management assembly in which a refrigerant in the air conditioning system exchanges heat with a working medium of the battery cooling system.
Fig. 2 is a schematic structural diagram of a specific embodiment of a thermal management assembly, in this embodiment, the thermal management assembly 400 includes a heat exchanger 500 and a second electronic expansion valve 2, the heat exchanger 500 and the second electronic expansion valve 2 are integrated into a whole, a refrigerant in an air conditioning system exchanges heat with a working medium of a battery cooling system in the heat exchanger 500, in this embodiment, the structure of the first electronic expansion valve 1 and the structure of the second electronic expansion valve 2 are the same, and the first electronic expansion valve 1 and the second electronic expansion valve 2 are hereinafter collectively referred to as electronic expansion valves. Of course, the structures of the first electronic expansion valve and the second electronic expansion valve may be different, or the battery cooling system does not use the electronic expansion valve, so long as one of the first electronic expansion valve and the second electronic expansion valve is the same as the electronic expansion valve structure in the technical scheme, and the electronic expansion valve structure is within the protection scope of the technical scheme.
Referring to fig. 3 to 6, the electronic expansion valve 1 includes a control portion 10, a valve seat 20, a valve member 40, and a sensor 50, the valve member 40 is fixed to the valve seat 20, the sensor 50 is electrically connected to the control portion 10, the sensor 50 is fixed to the valve seat 20, the control portion 10 and the valve seat 20 are fixedly disposed, and in this embodiment, the control portion 10 and the valve seat 20 are fixed by screws 70, or may be fixed by fastening or bonding. In this way, the sensor 50 is integrated in the electronic expansion valve 1, the sensor 50 is limited by the valve seat 20, a mechanical connection part for limiting the sensor is not required to be arranged separately, the structure is simpler, the pin of the sensor is connected with the control part 10, and a wire harness is not required to be arranged separately to transmit signals of the sensor to the controller. The electronic expansion valve 1 further comprises a first seal 60, the first seal 60 being arranged between the control portion 10 and the valve seat 20 to enhance the seal between the control portion 10 and the valve seat 20; the electronic expansion valve further comprises a first groove 103, the first groove 103 is disposed on the control portion 10 or the valve seat 20, and the first sealing member 60 is accommodated in the first groove 103 for positioning or limiting the first sealing member.
Referring to fig. 5 to 6, the valve seat 20 includes a first inlet 21, a first outlet 23, and a first passage 27, wherein the first inlet 21 and the first outlet 23 can communicate through the first passage 27; the valve seat 20 further includes a second inlet 22, a second outlet 24, and a second passage 28, the second inlet 22 and the second outlet 24 being capable of communicating through the second passage 28; the first channel 27 is not in communication with the second channel 28. Referring to fig. 3 and 4, the first inlet 21 and the second outlet 24 are disposed on the same side of the valve seat 20, and the second inlet 22 and the first outlet 23 are disposed on the same side of the valve seat 20, so that when the electronic expansion valve is integrated or assembled with the heat exchanger, the first outlet 23 of the electronic expansion valve is connected with the inlet of the heat exchanger 500, and the outlet of the heat exchanger is connected with the second inlet 22 of the electronic expansion valve, so that the heat exchanger and the electronic expansion valve can be installed correspondingly; in addition, the first inlet 21, the second inlet 22, the first outlet 23 and the second outlet 24 may be disposed on the same side of the valve seat 20, or may be disposed on different sides of the valve seat 20, and may be designed according to the actual application requirement of the electronic expansion valve. In the technical scheme, according to the flow direction of the working medium, the first outlet is positioned at the upstream of the inlet of the heat exchanger, and the second inlet is positioned at the downstream of the outlet of the heat exchanger.
Referring to fig. 9, the valve seat 20 further includes a first mounting portion 25 and a second mounting portion 26, the first mounting portion 25 has a first cavity 250, the second mounting portion 26 has a second cavity 260, the first cavity 250 can be communicated with the first channel 27, the second cavity 260 is communicated with the second channel 28, the valve seat 20 includes a first sidewall 204, and the opening of the first cavity 250 and the opening of the second cavity 260 are both formed on the first sidewall 204, or the first sidewall is formed with the first cavity 250 and the second cavity 260, or the opening of the first cavity and the opening of the second cavity are located on the first sidewall, or the opening of the first cavity and the opening of the second cavity are located on the same side of the valve seat, so in this embodiment, the first inlet 21 and the second outlet 24 are located on the same side of the valve seat 20, the second inlet 22 and the first outlet 23 are located on the same side of the valve seat 20, and the above three sides are different sides of the valve seat, which is beneficial to avoiding interference, and improving the utilization ratio of the valve seat.
Referring to fig. 7, the valve member 40 includes a valve core seat 41, a valve core 42, and a rotor assembly 43, wherein the rotor assembly 43 can drive the valve core 42 to move so that the valve core 42 can move relative to the valve core seat 41, the valve core seat 41 has a valve port 44, the valve port 44 communicates with the first passages 27 located at both sides of the valve port 44, and the valve core 42 can form a throttle at the valve port 44 by changing the flow cross-sectional area of the first passages at the valve port 44 near and far from the valve port 44.
In this embodiment, the valve component 40 further includes a connecting member 45 and a sleeve 46, the sleeve 46 covers the periphery of the rotor assembly 43, the sleeve 46 is welded and fixed with the connecting member 45, and the valve core seat 41 is fixedly connected with the connecting member 45, that is, the sleeve 46 and the valve core seat 41 are connected through the connecting member 45, so that the mold is simplified, the mold is miniaturized, and meanwhile, the forming processing of the valve core seat is facilitated; of course, the connecting piece 45 may be integrally formed with the valve core seat 41, so that the connection between the two is not required.
In this embodiment, the connecting member 45 is formed with a flange portion 411, and the flange portion 411 includes two surfaces, namely, a lower end surface 413 of the flange portion and an upper end surface 412 of the flange portion, the upper end surface 412 of the flange portion faces the side of the sleeve 46, and the lower end surface 413 of the flange portion faces the side of the valve seat 20.
At least a portion of the valve member 40 is received in the first cavity 250, the valve member 40 being fixedly disposed with the first mounting portion 25. Specifically, referring to fig. 9, the first mounting portion 25 includes a first stepped surface 252 and a first side portion 253, the first side portion 253 is provided closer to the outside of the valve seat than the first stepped surface 252 in the axial direction of the first mounting portion 25, and the first stepped surface 252 is substantially perpendicular to the axial direction of the main body portion of the first mounting portion 25, the first side portion 253 is parallel to the axial direction of the main body portion of the first mounting portion 25, the main body portion of the first mounting portion 25 refers to a portion in which the first cavity is formed, the first side portion 253 is surface-formed with threads, and the threads formed on the surface of the first side portion 253 are defined as female threads.
Referring to fig. 7, 9 and 12, the lower end face 413 of the flange portion abuts against the first step face 252, and the length of the spool 41 entering the first chamber 250 can be controlled by setting the distance from the first step face 252 to the outer surface of the valve seat 20 where the opening of the first chamber is formed. The electronic expansion valve 1 further includes a second compression nut 641, the second compression nut 641 has a first through hole 6411, a thread is formed on the outer periphery of the second compression nut, the thread formed on the outer periphery of the second compression nut is defined as an external thread 6412, the sleeve 46 passes through the first through hole 6411, the second compression nut 641 is disposed on the outer periphery of the connecting piece 45, the lower end face of the second compression nut abuts against the upper end face 412 of the flange portion, the second compression nut 641 is rotated, the external thread of the second compression nut 641 acts on the internal thread of the first side 253, the second compression nut 641 compresses the flange portion 411 against the valve seat 20, and the valve member 40 is relatively fixed with the valve seat 20, so that the relative position of the valve member 40 and the valve seat 20 is guaranteed to be unchanged, and the installation is convenient and simple.
The electronic expansion valve 1 further includes a second sealing member 540, the first mounting portion 250 of the valve seat 20 may further include a second step surface 251, the second step surface 251 is substantially parallel to the first step surface 252, and the second step surface 251 is far away from the first sidewall 204 relative to the first step surface 252, that is, the second step surface 251 is closer to the bottom of the first cavity 250 than the first step surface 252, the second sealing member 540 is disposed between the second step surface 251 and the lower end surface 413 of the flange portion, and the distance between the first step surface 252 and the second step surface 251 may be set according to the size of the second sealing member 540 and the sealing requirement, which is beneficial to avoiding the situation that the pressing force acting on the second sealing member 540 is too large or too small, resulting in poor sealing effect of the second sealing member 540, so as to enhance the sealing between the first mounting portion 25 and the valve member 40, reduce the risk of leakage of working medium, and thus improve the sealing performance of the electronic expansion valve. Or, the first step surface 252 is provided with a second groove, the second sealing element 540 is arranged in the second groove of the first step surface 252, the lower end face 413 of the flange part is in contact with the second sealing element 540 to press the second sealing element 540, and the first step surface 252 is provided with the second groove, so that the second sealing element 540 is convenient to install, the sealing between the first installation part 25 and the valve core seat 41 can be enhanced, the risk of leakage of working medium is reduced, the sealing performance of the electronic expansion valve is improved, and it can be known that the second groove can be also arranged on the side part of the flange part; the depth of the second groove is smaller than the thickness of the second sealing element, and the second sealing element is pressed between the valve component and the valve seat.
Referring to fig. 7 to 11, the control part 10 includes a cover 11, an electric control board 12 and a stator assembly 13, the electric control board 12 is electrically and/or signally connected to the stator assembly 13, the control part 10 has a control cavity 112, the cover 11 forms at least part of the control cavity 112, the control cavity 112 is disposed in communication with the second cavity, the electric control board 12 is installed in the control cavity 112, and the electric control board 12 is capable of outputting a control signal to the stator assembly 13 or transmitting the control signal to the stator assembly 13; the cover 11 and the stator assembly 13 are integrated through injection molding, specifically, the stator assembly 13 comprises a coil and a first contact pin 119, the stator assembly 13 is electrically connected and/or signal connected with the electric control board 12 through the first contact pin 119, the coil, the first contact pin 119 and the like are used as inserts to form the cover 11 through injection molding, one end of the first contact pin 119 is encapsulated in the cover 11, the other end of the first contact pin 119 is exposed out of the cover 11, and the other end of the first contact pin 119 exposed out of the cover 11 is fixedly connected with the electric control board 12 in an inserting mode and can be electrically connected and/or signal connected. The control part 10 further comprises an interface part 115, the electronic expansion valve is electrically connected and/or signal connected with the outside through the interface part 115, the interface part 115 is fixed with the cover 11 in an injection molding mode, the interface part 115 comprises a second contact pin 116, the interface part 115 is provided with a mounting cavity 1151, the second contact pin 116 stretches into the mounting cavity, the second contact pin 116 is fixed with the cover 11 in an injection molding mode, a first end of the second contact pin 116 stretches into the control cavity 112, a second end of the second contact pin 116 stretches into the mounting cavity 1151, at least part of the middle part of the second contact pin 116 is fixed with the cover 11 in an injection molding mode, the first end of the second contact pin 116 is spliced or crimped and fixed with the electric control board 12, the second end of the second contact pin 116 stretches into the mounting cavity 1151, and the electric control board 12 can be connected with a power supply and/or control signal outside the electronic expansion valve through the second contact pin 116. The electric control board 12 is provided with a first jack 122 and a second jack 125, the first contact pin 119 is inserted into the first jack 122, the second contact pin 116 is inserted into the second jack 125, the first contact pin 119, the second contact pin 116 and the electric control board 12 can be connected through welding or through press fit, and the electric control board 12 is relatively fixed with the cover 11 through the first contact pin 119 and the second contact pin 116. The stator assembly 13 and the cover 11 are assembled with the electric control plate 12 to form a first part of the control part by injection molding, wherein the stator assembly 13 is sleeved on the periphery of the rotor assembly 43.
Referring to fig. 7, 8, 11 and 14, along the axial direction of the second mounting portion 26, the opening direction of the second cavity 260 is defined as up, the opposite direction of the opening direction of the second cavity 260 is defined as down, the surface above the electric control board 12 is the first surface 123 of the electric control board, the surface opposite to the first surface 123 of the electric control board is the second surface 124 of the electric control board, or, along the axial direction of the second mounting portion 26, the second surface 124 of the electric control board is closer to the first sidewall 204 than the first surface 123 of the electric control board, and it is known that the electronic components of the electric control board 12 are disposed on the first surface of the electric control board or the second surface of the electric control board. Along the axial direction of the second mounting part 26, at least part of the electric control plate 12 is arranged between the second mounting part 26 and the cover 11; or, the first surface 123 of the electric control board faces the inner wall 113 of a part of the cover body, the second surface 124 of the electric control board faces the first side wall 204 provided with the second mounting part 26 and the sensor 50, or the cover body 11 is not arranged between the electric control board 12 and the valve seat 20, the electric control board 12 is fixedly installed with the first contact pin 119 and the second contact pin 116, the electric control board 12 is placed into the control cavity 112 from one side of the cover body corresponding to the valve seat 20, and the electric control board 12 is in pressure connection with the first contact pin 119 and the second contact pin 116, so that the installation of the electric control board and the assembly of the electronic expansion valve are facilitated. In addition, the electric control plate 12 and the stator assembly 13 are disposed on the same side of the first sidewall 204, and the electronic expansion valve is relatively compact.
In this embodiment, the sensor 50 is fixedly disposed on the valve seat 20, one end of the sensor 50 is fixed to the second mounting portion 26, and a part of the sensor 50 extends into the second chamber 260.
In the technical solution, the sensor 50 includes a body 51, a sensing head 52 and a connecting portion 53, where the sensing head 52 is fixedly disposed with the body 51, the sensing head 52 is located in the second channel 28 or the second cavity 260, and the sensing head 52 can sense parameters related to the working medium in the second channel 28 or the second cavity 260, such as a temperature and/or a pressure of the working medium. The electric control board 12 is electrically connected and/or signal-connected with the sensor 50 through the connecting part 53, one end of the connecting part 53 is exposed out of the first end of the body, the second end of the sensing head 52 is exposed out of the body 51, the first end of the body 51 and the second end of the body are located at different ends of the body, one end of the connecting part 53 is encapsulated in the body 51 and is electrically connected and/or signal-connected with the sensing head 52, the other end of the connecting part 53 is exposed out of the body 51 and is electrically connected and/or signal-connected with the electric control board 12, and at least part of the connecting part 53 is located in the control cavity 112 because the electric control board 12 is arranged in the control cavity 112.
Referring to fig. 8, a second surface 124 of the electronic control board is provided with a first abutting portion 121; the first abutting portion 121 includes a conductive layer formed on the second surface 124 of the electric control board, where the conductive layer may be a tin plating layer, electroless nickel plating, immersion gold plating, or a conductive metal sheet fixedly connected to the electric control board; the first abutting part 121 is electrically connected with a circuit of the electric control board, the connecting part 53 of the sensor abuts against the first abutting part 121 and can be electrically connected or/and connected with a signal, or the connecting part 53 is fixedly connected with the first abutting part and is electrically connected or/and connected with the signal; the sensor 50 and the electric control board 12 that set up like this pass through first butt portion 121 butt, do not need to set up the spliced eye on the electric control board 12, are favorable to arranging the electric components and parts on the first face of electric control board, are favorable to improving the utilization ratio of the first face of electric control board, do not need to weld simultaneously, and the packaging technology is simpler.
Specifically, in this embodiment, the sensor includes five connection portions 53, which is beneficial to improving the connection reliability between the connection portions and the electric control board, the sensor 50 further includes a conductive board 54, the conductive board 54 is made of a conductive material, the conductive board 54 is encapsulated in the body 51, and a first end of the connection portion 53 is fixedly connected with the conductive board 54, including welding with surface-to-surface contact, welding after plugging, or interference plugging, fixing and electrically connecting and/or signal connecting; the inductive head 52 is fixedly connected or plugged by welding with the conductive plate 54, and the connection portion 53 is electrically and/or signally connected with the inductive head 52 via the conductive plate 54, so that support is provided for the connection portion and the inductive head via the conductive plate. Of course, the positions of the connecting part and the conductive plate can be limited by the body, namely, the connecting part is contacted with the conductive plate and is electrically connected and/or connected with the signal, and the connecting part is fixedly connected with the conductive plate by the body; the positions of the conductive plate and the inductive head are limited through the body, namely, the conductive plate is electrically connected and/or in signal connection with the inductive head, and the conductive plate and the inductive head are fixedly connected through the body. Of course, if the sensor only comprises one connecting part, the conductive plate can be omitted, the connecting part is electrically connected with the induction head and/or in signal connection, and the connecting part is fixedly connected with the induction head or the connecting part is fixedly connected with the induction head through the body; in this way, the structure of the sensor is simpler.
In this embodiment, the connection portion 53 is an elastic element, such as a spring, a spring leaf, or a leaf spring, and in this embodiment, the connection portion 53 is used as a spring to describe that, after the connection portion 53 is fixed, the connection portion 53 is compressed and deformed by the electric control board 12 and the conductive member 54, and the connection portion 53 is elastically deformed, or the length of the elastic element between the electric control board and the sensor is smaller than the length of the elastic element in a natural state, which is beneficial to more reliable contact between the connection portion 53 and the electric control board 12. The body is formed with a holding cavity, one part of the connecting part is held in the holding cavity, the other part of the connecting part is exposed out of the body, one end of the connecting part 53 exposed out of the body is abutted with the conductive layer of the electric control plate 12, the opposite end of the connecting part is abutted with the conductive plate or the induction head of the sensor, welding is reduced relatively, and the assembly process is simplified. The connecting portion 53 abuts against the electric control board 12, the electric control board 12 deforms, in order to eliminate the acting force of the connecting portion 53 on the electric control board 12 and enhance the stability of the electric control board 12, the cover 11 is provided with the supporting portion 101, the supporting portion 101 protrudes relatively to the inner wall 113 of the cover and protrudes towards the electric control board 12, along the axis direction of the second mounting portion 26, the supporting portion 101 is located above the electric control board 12, the supporting portion 101 is approximately perpendicular to the first face 123 of the electric control board, the supporting portion 101 contacts with the first face 123 of the electric control board, the supporting portion 101 and the connecting portion 53 are located on two sides of the electric control board 12 respectively, the supporting portion 101 is used for counteracting the elastic force of the connecting portion 53 on the electric control board 12, in this embodiment, the electric control board 12 comprises five first abutting portions 121, the cover 11 comprises two supporting portions 101, the first abutting portions 121 surround to form a first area, and the supporting portion 101 is supported in the position close to the center of the first area so as to facilitate the relative stability of the electric control board 12.
The body 51 further includes a limiting portion 512, which is a non-rotating body, the limiting portion 512 includes a limiting surface 535, and the limiting surface 535 is distributed along the circumferential direction of the limiting portion 512; correspondingly, the second mounting portion 26 comprises a matching portion 264, the matching portion 264 comprises a matching surface, the matching surface is formed on the side wall of the second mounting portion, after the sensor is assembled with the valve seat, the matching surface is matched and abutted with the limiting surface, rotation of the sensor relative to the valve seat is limited, the position of the sensor relative to the valve seat is guaranteed, and further the position of the sensor relative to the electric control plate is guaranteed. Specifically, referring to fig. 9 and 10, the main body 51 further includes a main body 511, the conductive plate 54 is fixedly disposed with the main body 511, in this embodiment, at least a portion of the limiting portion 512 protrudes from an outer edge of the main body 511, along an axial direction of the second mounting portion 26, the main body 511 is closer to the electric control plate 12 than the limiting portion 512, and the electronic expansion valve further includes a first compression nut, where the first compression nut presses a portion of the limiting portion 512 protruding from the main body. Specifically, the limiting portion 512 includes a limiting surface 535, a lower end surface 534 of the limiting portion, and an upper end surface 533 of the limiting portion, where the limiting surface 535 is distributed along the circumferential direction of the limiting portion 512, and the lower end surface 534 of the limiting portion is located on one side of the limiting portion 512 and the upper end surface 533 of the limiting portion is located on the other side of the limiting portion 512 along the axial direction of the sensor. The limiting surface 535 includes a cambered surface and a planar surface, and it can be appreciated that when the limiting portion 512 is located in the second cavity 260, the sensor cannot rotate because the limiting portion is a non-rotating body. The structure of the limiting portion may be various, so long as the sensor is prevented from rotating, such as a square, oval or other shape of the limiting portion. The second mounting portion 26 includes a third step surface 263, an abutment surface 262, and a second side portion 265, the mating surface 264 being located between the third step surface 263 and the abutment surface 262 in the axial direction of the second mounting portion 26, the third step surface 263 being closer to the first side wall 204 than the abutment surface 262, the second side portion 265 being closer to the first side wall 204 than the third step surface 263; the third step surface 263 and the abutment surface 262 are substantially perpendicular to the axial direction of the second mounting portion 26, the mating surface 264 and the second side portion 265 are substantially parallel to the axial direction of the second mounting portion 26, the second side portion 265 has internal threads, and the lower end surface 534 of the limiting portion abuts against the abutment surface 262, so that the length of the sensor 50 entering the second cavity 260 can be controlled; the electronic expansion valve includes a first compression nut 541, the first compression nut 541 is sleeved on the main body 511, a lower end surface of the first compression nut abuts against an upper end surface of the limiting portion, threads are formed on an outer periphery of the first compression nut, the second mounting portion includes a threaded portion, the threaded portion is disposed far away from a bottom of the second mounting portion than the mating portion, and under the action of the threads of the outer periphery of the first compression nut 541 and the threaded portion of the second side portion 265 of the second mounting portion, the first compression nut 541 compresses the limiting portion 512, thereby connecting the sensor 50 and the valve seat 20.
In this embodiment, the electronic expansion valve further includes a third sealing member 520 disposed between the bottom of the second mounting portion and the sensor, so as to form a sealing structure between the sensor and the valve seat, and prevent the working medium in the second channel from entering the control chamber through a gap between the sensor and the valve seat. The third sealing element 520 is arranged at the bottom of the second installation part and is limited by forming a matching surface, the distance from the abutting surface to the bottom of the second installation part is smaller than the thickness of the third sealing element, the lower end surface 534 of the limiting part is in contact with the third sealing element 520, the third sealing element 520 is pressed at the bottom of the second installation part, and the compression amount of the third sealing element is controlled by setting the distance from the abutting surface to the bottom of the second installation part, so that the situation that the pressing force acting on the third sealing element 520 is too large or too small and the sealing effect of the third sealing element 520 is poor is avoided, the sealing between the second installation part 26 and the sensor 50 is enhanced, the risk that working medium leaks to a control cavity is reduced, the sealing performance of the electronic expansion valve is improved, and the internal leakage risk is reduced; it can be known that the third sealing element can also be arranged between the limiting surface and the valve seat, namely, a third groove is arranged on the limiting surface or the valve seat, the third sealing element is clamped in the third groove, and the limiting surface or the valve seat which is not provided with the third groove compresses the third sealing part. Or forming a third groove or step part on the lower end surface of the limit part of the sensor; or, a third groove is formed on the abutting surface of the second mounting part, the third sealing piece is clamped in the third groove, the depth of the third groove is smaller than the thickness of the third sealing piece, and the third sealing piece is tightly pressed between the lower end surface of the limiting part of the sensor and the valve seat.
In this embodiment, referring to fig. 11, the cover 11 further includes a first ring portion 117, where the first ring portion 117 is formed near the outer edge of the cover 11 of the control portion, or the first ring portion 117 surrounds the outer periphery of the control chamber, and in one embodiment of the present invention, after the cover is assembled with the valve seat, the first ring portion 117 abuts against the first sidewall 204 of the valve seat; the electronic expansion valve further comprises a first sealing element 60, the first sealing element is arranged around the periphery of the control cavity, the first sealing element 60 is arranged between the first side wall 204 and the first ring part 117, further, the cover 11 presses the first sealing element 60 against the valve seat 20, so that sealing between the cover 11 and the valve seat 20 can be enhanced, leakage of working medium to the outside of the electronic expansion valve through a connecting part of the cover and the valve seat is reduced, or external medium enters the electronic expansion valve through the connecting part of the cover and the valve seat, external sealing of the electronic expansion valve is improved, in one embodiment of the invention, the first ring part 117 is arranged near the periphery of the cover 11, specifically, please refer to fig. 7, the opening of the first cavity 250, the opening of the second cavity 260 and the first ring part 117 are projected to a plane perpendicular to the periphery, so as to form a first projection, a second projection, a third projection, and the first projection and the second projection are located in a region surrounded by the third projection, namely, the first sealing element is located in the opening of the first cavity and the second ring part is fixed to the periphery of the control cavity, so that the working medium can be prevented from entering the external medium. In another embodiment, referring to fig. 14, since the external medium is mainly prevented from entering the control chamber, and the electronic control board is damaged, in this embodiment, the first sealing member 60 is disposed around the opening of the second chamber 260 along the axial direction of the second mounting portion 26, and after the first ring portion is connected to the valve seat, the cover body compresses the first sealing member against the valve seat, so that the sealing of the control chamber can be achieved after the first ring portion and the valve seat are relatively fixed. Part of the first sealing element is arranged between the opening of the first cavity and the opening of the second cavity, so that working medium entering the first cavity can be prevented from entering the control cavity, and the first sealing element is not arranged at the periphery of the opening of the first cavity; this is advantageous in miniaturizing the first seal. The first contact pin 119 and the second contact pin 116 are integrally injection molded with the cover body 11, when the electric control board 12 is assembled, the electric control board 12 is pressed to the first contact pin 119 and the second contact pin 116, the electric control board 12 is fixedly connected with the first contact pin 119 and the second contact pin 116 in a pressing mode or fixedly welded mode, an opening of a control cavity of the cover body faces to a valve seat, the electric control board is arranged in the control cavity from the opening of the control cavity of the cover body, and the cover body 11 and the stator assembly are integrally formed. Of course, the cover 11 also includes a first shell and a second shell, where the first shell is formed separately, and the second shell is formed integrally with the stator assembly, so that the opening of the control cavity faces away from the valve seat, the electric control board is disposed in the control cavity from the opening of the control cavity and fixedly connected with the first pin and the second pin, and then the first shell and the second shell are fixed and sealed, for example, sealed and fixed in a laser welding manner; the second housing includes a first ring portion formed with a first communication hole around which the first seal member surrounds an outer periphery thereof, and presses the first seal member against the valve seat.
In this embodiment, the electronic expansion valve further includes a first groove 103, where the first groove 103 may be disposed on the first ring portion 117; the first groove 103 may also be provided on the valve seat 20, i.e. the wall of the first groove is part of the first side wall 204, or the first side wall 204 comprises a wall of the first groove, the first groove 103 being provided opposite the first ring portion 117; the first sealing member 60 is disposed in the first groove 103, and the depth of the first groove is smaller than the height of the first sealing member, so that the first sealing member 60 is pressed when the cover 11 and the valve seat 20 are fixed, and sealing between the valve seat 20 and the cover 11 is achieved. In addition, referring to fig. 11, the electronic expansion valve may further include at least one clamping groove 105, where the clamping groove and the first groove 103 are disposed on the valve seat or the first ring portion of the cover body together, the clamping groove 105 is communicated with the first groove 103, correspondingly, the first sealing member 60 further includes at least one protrusion 601, and the protrusion 601 of the first sealing member is in interference fit with the clamping groove 105, so that when the first groove 103 is disposed on the first ring portion 117 of the cover body 11, the first sealing member 60 can be prevented from falling when the control portion 10 is assembled with the valve seat 20, and installation is convenient.
Referring to fig. 11 and 13, the cover 11 further includes two or more limiting pins 102, in this embodiment, the cover includes two limiting pins 102, the limiting pins 102 are fixedly connected with the first ring 117, the limiting pins 102 protrude toward the valve seat 20 relative to the first ring 117, and the limiting pins 102 are disposed near the outer edge of the first ring 117 or are located outside the first groove; the valve seat 20 comprises positioning holes 202, the number of the positioning holes 202 is the same as that of the limiting pins 102, and the limiting pins 102 are inserted into the positioning holes 202 to limit the relative positions of the control part 10 and the valve seat 20, so that the control part 10 can be prevented from deviating relative to the valve seat 20 in the assembly process, and the fixed connection of the control part 10 and the valve seat 20 is accurate and convenient to assemble. It can be appreciated that the limiting pin can also be arranged on the valve seat, and the corresponding limiting hole is arranged on the cover body.
The electronic expansion valve further comprises a fastening device 70, the fastening device 70 can be bolts or screws, the cover 11 comprises a second communication hole 104, the second communication hole 104 is arranged close to the outer edge of the first ring portion 117, namely, the second communication hole 104 penetrates through the first ring portion 117, the valve seat 20 comprises threaded holes 203, the fastening device 70 fixedly connects the control portion 10 with the valve seat 20 through the second communication hole 104 and the threaded holes 203, in the embodiment, the number of the second communication holes is more than or equal to two, the number of the threaded holes is the same as the number of the second communication holes, so that the first sealing element 60 is tightly pressed, the control portion 10 and the valve seat 20 can be integrated into a whole, tightness, waterproof and dustproof performance between the valve seat 20 and the control portion 10 can be ensured, invasion of external water or dust and leakage of internal working media can be effectively prevented, and the function of integral sealing is achieved.
Referring to fig. 11 to 13, a method of manufacturing an electronic expansion valve, the electronic expansion valve including a control part, a valve seat, a valve member, and a sensor, the control part including a cover, a stator assembly, and an electric control board, the cover and the stator assembly being integrally molded by injection molding, the method of manufacturing the electronic expansion valve including the steps of:
a1, assembling the control part, comprising
Forming a first part of the control part, namely forming the first part comprising the cover body by insert molding with the stator assembly, the first contact pin and the second contact pin as inserts;
the electric control board is assembled with the first part and is fixedly connected with the first contact pin and the second contact pin;
a2, fixedly connecting the valve component with the valve seat;
a3, fixedly connecting the sensor with the valve seat;
a4, assembling the control part formed in the step a1 with the assembly formed in the steps a2 and a 3.
The sequence of the steps a1, a2 and a3 is adjustable, and a4 follows the steps a1, a2 and a 3. The assembly of the valve component is further included before the step a2, the valve component comprises a valve core seat, a valve core, a sleeve, a connecting piece and a rotor assembly, the rotor assembly and the valve core assembly are arranged on the inner side of the sleeve, the sleeve is fixedly welded with the connecting piece, and the valve core seat is fixedly welded with the connecting piece.
The sensor is formed before the step a3, and comprises a connecting part, a conductive plate, a body and a sensing head, wherein the connecting part comprises an elastic element, the elastic element is in contact with the conductive plate, the sensing head is in contact with the conductive plate, and the elastic element, the conductive plate and the sensing head are used as inserts to form the sensor comprising the body through injection molding.
Step a2 comprises: and placing a second sealing element in the first cavity, placing the valve component in the first cavity, and fixedly arranging the valve component and the valve seat through a second compression nut.
Step a3 further comprises placing a third sealing element in the second cavity, limiting the limiting part of the sensor to the matching part of the valve seat, placing the sensor in the second cavity of the valve seat, and fixing the sensor and the valve seat through the first compression nut.
Step a4 further comprises: the first sealing element is arranged in the first groove, the limiting pin is inserted into the positioning hole of the valve seat, and the control part is fixedly connected with the valve seat through the fastening device.
The step a4 includes: the sensor is electrically connected and/or in signal connection with the electric control plate, the connecting part of the sensor is abutted with the first abutting part of the electric control plate, and the electric control plate compresses the elastic element of the connecting part of the sensor to deform for a set length.
The electronic expansion valve comprises a control part, a valve seat, a valve component and a sensor, wherein the control part comprises a cover body, a stator assembly and an electric control plate, the cover body comprises a first shell and a second shell, the second shell and the stator assembly are integrally formed, a control cavity is formed between the first shell and the second shell, and the manufacturing method of the electronic expansion valve comprises the following steps:
a1, assembling the control part, comprising
Forming a first part of the control part, namely forming the first part comprising the second shell by insert molding with the stator assembly, the first contact pin and the second contact pin as inserts;
The electric control plate is arranged on the first part; the electric control board is fixedly connected with the first contact pin and the second contact pin;
the first shell is fixedly connected with the second shell;
a2, fixedly connecting the valve component with the valve seat;
a3, fixedly connecting the sensor with the valve seat;
a4, assembling the control part formed in the step a1 with the valve seat.
The electronic expansion valve manufactured in this way has a large degree of freedom in the design of the assembly process, since there is no limitation in the assembly of the valve components and the assembly steps of the sensor.
It should be noted that: the above embodiments are only for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the present invention may be modified or substituted by the same, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention are intended to be included in the scope of the claims of the present invention.

Claims (13)

1. The electronic expansion valve comprises a valve component, a control part and a sensor, wherein the valve component comprises a valve core seat, a valve core and a rotor assembly, the valve core seat is provided with a valve port, the rotor assembly can drive the valve core to move relative to the valve core seat, and the valve core can adjust the opening of the valve port relative to the valve core seat; the control part comprises a cover body, a stator assembly and an electric control plate, wherein the stator assembly is electrically connected and/or in signal connection with the electric control plate, the sensor is electrically connected and/or in signal connection with the electric control plate, and the stator assembly is sleeved on the periphery of the rotor assembly; the cover body is provided with at least part of a control cavity, the electric control plate is arranged in the control cavity, part of the sensor is positioned in the control cavity, the sensor is in butt joint with the electric control plate, the sensor comprises a connecting part, the connecting part comprises an elastic element, the sensor is in butt joint with the electric control plate through the elastic element, and the length of the elastic element between the electric control plate and the sensor is smaller than the length of the elastic element in a natural state.
2. The electronic expansion valve of claim 1, wherein: the electric control board comprises a first surface and a second surface, the first surface and the second surface are oppositely arranged, the electric control board comprises a first abutting part, the first abutting part is formed on the second surface or is fixedly connected with the second surface, the sensor is contacted with the first abutting part, and the first abutting part is electrically connected with a circuit of the electric control board and/or in signal connection.
3. The electronic expansion valve of claim 2, wherein: the sensor comprises a body and a sensing head, wherein the sensing head is fixedly connected with the body, the connecting part is fixedly connected with the body, the sensing head is electrically connected with the connecting part and/or in signal connection with the connecting part, and the elastic element is in butt joint with the first butt joint part.
4. The electronic expansion valve of claim 3, wherein: the sensor comprises more than two elastic elements, the sensor further comprises a conductive plate, the conductive plate is fixedly connected with the body, the elastic elements are fixedly welded with the conductive plate, and the induction head is fixedly and electrically connected with the conductive plate and/or in signal connection.
5. The electronic expansion valve of claim 2, wherein: the control part comprises a supporting part, the supporting part protrudes from the cover body to the control cavity, the supporting part is abutted with the first surface, the contact positions of the supporting part and the first surface are in one-to-one correspondence with the positions of the second surface where the first abutting part is located, or the contact positions of the supporting part and the first surface are located in the area surrounded by the first abutting part.
6. The electronic expansion valve of claim 3, wherein: the control part comprises a supporting part, the supporting part protrudes from the cover body to the control cavity, the supporting part is abutted with the first surface, the contact positions of the supporting part and the first surface are in one-to-one correspondence with the positions of the second surface where the first abutting part is located, or the contact positions of the supporting part and the first surface are located in the area surrounded by the first abutting part.
7. The electronic expansion valve of claim 6, wherein: the elastic element is a spring, the body is formed with an accommodating cavity, one part of the spring is accommodated in the accommodating cavity, the other part of the spring is exposed out of the body, the first abutting part comprises a conductive layer formed on the electric control plate, and the other part of the spring exposed out of the body is abutted against the conductive layer.
8. The electronic expansion valve of claim 7, wherein: the body includes spacing portion, spacing portion is non-rotator, spacing portion includes spacing face, spacing face is followed spacing portion's circumference distributes, and at least part spacing portion protrusion the outer fringe of body sets up, electronic expansion valve still includes the disk seat, the disk seat includes second installation department, second installation department includes mating portion and butt face, mating portion includes the mating surface, the mating surface take shape in the lateral wall of second installation department, spacing face with mating surface butt, the butt face is than the mating portion is closer to the bottom setting of second installation department, the lower terminal surface of spacing portion with butt face butt.
9. The electronic expansion valve of any of claims 1-8, wherein: the electronic expansion valve comprises a valve seat, the valve seat comprises a first installation part and a second installation part, the valve seat is provided with a first channel and a second channel, the first installation part is provided with a first cavity, the second installation part is provided with a second cavity, the first cavity is connected with the first channel, the second cavity is communicated with the second channel, at least part of the valve core seat is positioned in the first cavity, at least part of the valve core seat is positioned in the second cavity, the control cavity is communicated with the second cavity, the sensor is fixedly connected with the valve seat and positioned, and the sensing head of the sensor is positioned in the second cavity or the second channel.
10. The electronic expansion valve of claim 9, wherein: the electronic expansion valve comprises a first compression nut, threads are formed on the periphery of the first compression nut, the second installation portion comprises a threaded portion and a matching portion, the threaded portion is far away from the bottom of the second installation portion than the matching portion, the threaded portion is formed on the side wall of the second installation portion, the first compression nut is in threaded connection with the threaded portion, the body of the sensor comprises a limiting portion, and the lower end face of the first compression nut is in butt joint with the upper end face of the limiting portion.
11. The electronic expansion valve of claim 10, wherein: at least a portion of the cover body and the stator assembly are integrally injection molded, the opening of the control cavity faces the valve seat, the opening of the first cavity and the opening of the second cavity are located on the same side of the valve seat, the opening of the first cavity and the opening of the second cavity are located on the first side wall of the valve seat, the electronic expansion valve further comprises a first contact pin and a second contact pin, the first contact pin and the second contact pin are fixedly injection molded with the cover body, the electric control board is fixedly connected with the first contact pin and the second contact pin, the control part is fixedly connected with the valve seat, and at least a first sealing piece is arranged on the periphery of the second cavity and is pressed by the control part and the valve seat.
12. The electronic expansion valve is fixedly connected with the heat exchanger, the electronic expansion valve comprises a valve seat, a valve component, a control part and a sensor, the valve seat comprises a first mounting part and a second mounting part, the valve seat is provided with a first channel and a second channel, the first mounting part is provided with a first cavity, the second mounting part is provided with a second cavity, the first cavity is communicated with the first channel, the second cavity is communicated with the second channel, an opening of the first cavity and an opening of the second cavity are positioned on the same side of the valve seat, and an opening of the first cavity and an opening of the second cavity are positioned on a first side wall of the valve seat; the valve component comprises a valve core seat, a valve core and a rotor component, wherein the valve core seat is provided with a valve port, the rotor component can drive the valve core to move relative to the valve core seat so as to adjust the opening of the valve port, and at least part of the valve core seat is positioned in the first cavity; at least a portion of the sensor is located in the second cavity; the control part comprises a cover body, a stator assembly and an electric control plate, wherein the electric control plate is electrically connected and/or in signal connection with the stator assembly, the electric control plate is electrically connected and/or in signal connection with the sensor, at least one part of the cover body and the stator assembly are integrally injection molded, and the stator assembly is sleeved on the rotor assembly; the cover body is provided with at least a part of control cavity, the electric control plate is arranged in the control cavity, the second cavity is communicated with the control cavity, the sensor is fixedly connected with the valve seat and positioned, the sensor is abutted to the electric control plate, the sensor comprises a connecting part, the connecting part comprises an elastic element, the sensor is abutted to the electric control plate through the elastic element, and the length of the elastic element between the electric control plate and the sensor is smaller than that of the elastic element in a natural state;
The valve seat comprises a first inlet, a second inlet, a first outlet and a second outlet, wherein a first channel is communicated with the first outlet and the first inlet, a second channel is communicated with the second outlet and the second inlet, the first outlet is communicated with the inlet of the heat exchanger, the second inlet is communicated with the outlet of the heat exchanger, and the inlet of the heat exchanger is communicated with the outlet of the heat exchanger through a third channel of the heat exchanger.
13. A thermal management assembly comprising an electronic expansion valve and a heat exchanger, the electronic expansion valve being fixedly connected to the heat exchanger, the electronic expansion valve comprising a valve seat, a valve member, a control portion and a sensor, the heat exchanger comprising a first mounting portion and a second mounting portion, the heat exchanger having a first channel and a second channel, the first mounting portion having a first cavity, the second mounting portion having a second cavity, the first cavity being in communication with the first channel, the second cavity being in communication with the second channel, the opening of the first cavity and the opening of the second cavity being on the same side of the heat exchanger, the opening of the first cavity and the opening of the second cavity being on a first side wall of the valve seat; the valve component comprises a valve core seat, a valve core and a rotor component, wherein the valve core seat is provided with a valve port, the rotor component can drive the valve core to move relative to the valve core seat so as to adjust the opening of the valve port, and at least part of the valve core seat is positioned in the first cavity; at least a portion of the sensor is located in the second cavity; the control part comprises a cover body, a stator assembly and an electric control plate, wherein the electric control plate is electrically connected and/or in signal connection with the stator assembly, the electric control plate is electrically connected and/or in signal connection with the sensor, at least one part of the cover body and the stator assembly are integrally injection molded, and the stator assembly is sleeved on the rotor assembly; the cover body is provided with at least part of a control cavity, the electric control plate is arranged in the control cavity, the second cavity is communicated with the control cavity, the sensor is fixedly connected with the valve seat and positioned, the sensor is in butt joint with the electric control plate, the sensor comprises a connecting part, the connecting part comprises an elastic element, the sensor is in butt joint with the electric control plate through the elastic element, and the length of the elastic element between the electric control plate and the sensor is smaller than the length of the elastic element in a natural state.
CN201911179429.0A 2018-07-20 2018-07-20 Electronic expansion valve and thermal management assembly Active CN111022728B (en)

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