CN118346807A - Electronic expansion valve - Google Patents

Electronic expansion valve Download PDF

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Publication number
CN118346807A
CN118346807A CN202410389957.3A CN202410389957A CN118346807A CN 118346807 A CN118346807 A CN 118346807A CN 202410389957 A CN202410389957 A CN 202410389957A CN 118346807 A CN118346807 A CN 118346807A
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CN
China
Prior art keywords
electronic expansion
sensor
expansion valve
valve
valve body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410389957.3A
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Chinese (zh)
Inventor
请求不公布姓名
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sanhua Automotive Components Co Ltd
Original Assignee
Zhejiang Sanhua Automotive Components Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sanhua Automotive Components Co Ltd filed Critical Zhejiang Sanhua Automotive Components Co Ltd
Priority to CN202410389957.3A priority Critical patent/CN118346807A/en
Publication of CN118346807A publication Critical patent/CN118346807A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped 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
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0025—Electrical or magnetic means
    • F16K37/005—Electrical or magnetic means for measuring fluid parameters
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/63—Control systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/66—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells
    • H01M10/663—Heat-exchange relationships between the cells and other systems, e.g. central heating systems or fuel cells the system being an air-conditioner or an engine
    • 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
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Electrically Driven Valve-Operating Means (AREA)

Abstract

The utility model provides an electronic expansion valve, electronic expansion valve integrated has the sensor, and stator module and sensor are connected with automatically controlled board electricity respectively, and automatically controlled portion sets up in the same side of valve body side by side with stator module, and automatically controlled board sets up perpendicularly with the sensor, and the central axis parallel arrangement of sensor and case is favorable to making the compact structure of electronic expansion valve like this, reduces the connection pencil, and it is more convenient to assemble.

Description

Electronic expansion valve
(The application is a divisional application of China patent application with the application date 2017-05-09 and the application number 201710319514.7, namely an electronic expansion valve, a thermal management component, a cooling system and a manufacturing method of the electronic expansion valve.)
[ Field of technology ]
The invention relates to an electronic expansion valve.
[ Background Art ]
The cooling system includes a compressor, an evaporator, a condenser, and a throttle element, and in order to improve the flow control accuracy of the working medium, an electronic expansion valve is used as the throttle element in the prior art. Typically, the control of the electronic expansion is achieved by the controller calculating the superheat according to a corresponding control program by collecting parameters via pressure and temperature sensors arranged on the piping. Therefore, the sensor and the electronic expansion valve are respectively connected with the cooling system through pipelines, and the cooling system is large in occupied space and complex in assembly process.
Accordingly, there is a need for improvements in the above-described techniques to solve the above-described problems.
[ Invention ]
The invention aims to provide an electronic expansion valve, which is beneficial to the compactness of the electronic expansion valve.
In order to achieve the above purpose, the invention discloses an electronic expansion valve, which comprises a valve core assembly, an electric control part and a stator assembly, wherein the valve core assembly comprises a valve seat, a valve core and a rotor assembly, the valve seat is provided with a valve port, the valve core can move relative to the valve seat and change the opening of the valve port, the electric control part can control the stator assembly, the rotor assembly drives the valve core to move, the electronic expansion valve further comprises a sensor, the stator assembly and the sensor are respectively and electrically connected with an electric control plate, the electric control part and the stator assembly are arranged on the same side of the valve body side by side, the electric control plate is perpendicular to the sensor, and the sensor and a central shaft of the valve core are arranged in parallel.
The electronic expansion valve is integrated with the sensor, the stator assembly and the sensor are respectively and electrically connected with the electric control plate, the electric control part and the stator assembly are arranged on the same side of the valve body side by side, the electric control plate and the sensor are vertically arranged, the sensor and the central shaft of the valve core are arranged in parallel, and thus the electronic expansion valve is compact in structure, reduces connecting wiring harnesses and is more convenient to assemble.
[ Description of the drawings ]
FIG. 1 is a schematic diagram of one embodiment including a cooling system;
FIG. 2 is a schematic structural view of one embodiment of a thermal management assembly;
FIG. 3 is a schematic perspective view of an electronic expansion valve in one direction;
FIG. 4 is a schematic view of another directional perspective of the electronic expansion valve;
FIG. 5 is a schematic diagram showing a front view of a first embodiment of an electronic expansion valve;
FIG. 6 is a schematic diagram of the right-hand construction of the electronic expansion valve of FIG. 5;
FIG. 7 is a schematic top view of the electronic expansion valve of FIG. 5;
FIG. 8 is a schematic view of a cross-sectional structure in the B-B direction of the electronic expansion valve of FIG. 6;
FIG. 9 is a schematic view of a sectional structure of the electronic expansion valve in the direction A-A of FIG. 5;
FIG. 10 is a schematic view of a sectional structure in the D-D direction of the electronic expansion valve of FIG. 5;
FIG. 11 is a schematic elevational view of a second embodiment of an electronic expansion valve;
FIG. 12 is a schematic cross-sectional view of a second embodiment of an electronic expansion valve
FIG. 13 is a schematic elevational view of a third embodiment of an electronic expansion valve;
FIG. 14 is a schematic cross-sectional view of a third embodiment of an electronic expansion valve
FIG. 15 is a schematic elevational view of a fourth embodiment of an electronic expansion valve;
FIG. 16 is a schematic cross-sectional view of a fourth embodiment of an electronic expansion valve;
FIG. 17 is a schematic cross-sectional view of a fifth embodiment of an electronic expansion valve;
FIG. 18 is a schematic view of one of the assembly steps of the electronic expansion valve;
FIG. 19 is a schematic view of a second step of assembling an electronic expansion valve;
FIG. 20 is a schematic view of a third step of assembling the electronic expansion valve;
fig. 21 is a schematic structural view of a valve body of the first embodiment of the electronic expansion valve.
[ Detailed description ] of the invention
The invention is further described with reference to the drawings and the specific embodiments below:
The cooling system is mainly applied to a vehicle or a household appliance, and the vehicle cooling system is described below, and at least includes an air conditioning system, but the vehicle cooling system may include a battery cooling system as the battery is applied to the vehicle. When the cooling system works, the air conditioning system comprises a circulating refrigerant, and the battery cooling system comprises a circulating working medium, wherein the working medium can be water, oil, a mixture containing water or oil, a refrigerant and the like.
Fig. 1 is a schematic diagram of an embodiment of a cooling system, which in this example includes an air conditioning system including a compressor 10, a condenser 20, a first electronic expansion valve 30, and an evaporator 40, 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 10, the high-temperature and high-pressure refrigerant is cooled through the condenser 20 and then becomes normal-temperature and high-pressure refrigerant, and the normal-temperature and high-pressure refrigerant enters the evaporator 40 through the first electronic expansion valve 30; since the pressure of the refrigerant at normal temperature and high pressure is reduced after passing through the first electronic expansion valve 30, the refrigerant is vaporized to become a low-temperature refrigerant, and the low-temperature refrigerant absorbs a large amount of heat through the evaporator 40 and returns to the compressor 10; the battery cooling system includes a heat management assembly 50 and a pump 60, the refrigerant in the air conditioning system exchanges heat with the working medium of the battery cooling system in the heat management assembly 50, and the pump 60 provides power for the circulating motion of the working medium of the battery cooling system.
Fig. 2 is a schematic structural diagram of a specific embodiment of a thermal management assembly 50, in this embodiment, the thermal management assembly 50 includes a heat exchanger 70 and a second electronic expansion valve 80, the heat exchanger 70 and the second electronic expansion valve 80 are integrated into a whole, and a refrigerant in an air conditioning system exchanges heat with a working medium of a battery cooling system in the heat exchanger 70, in this embodiment, the structure of the first electronic expansion valve 30 and the structure of the second electronic expansion valve 80 are the same, and the first electronic expansion valve 30 and the second electronic expansion valve 80 are hereinafter collectively referred to as electronic expansion valves. Of course, the first electronic expansion valve and the second electronic expansion valve may be different in structure, or the battery cooling system does not use an 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 of the present invention in structure, and is within the scope of the present invention.
Referring to fig. 3 and 4, the electronic expansion valve is formed with a first inlet 11, a second inlet 12, a first outlet 13 and a second outlet 14, a first passage is formed between the first inlet 11 and the first outlet 13, a second passage is formed between the second inlet 12 and the second outlet 14, the electronic expansion valve includes a sensor including a sensing head provided in the second passage or a chamber directly communicating with the second passage, so that the sensor can detect the temperature or pressure of a refrigerant or a working medium in the second passage or the temperature and pressure.
For an air conditioning system, the evaporator 40 includes a third passage and a fourth passage, the first passage communicates with the third passage, the third passage communicates with the fourth passage, the fourth passage communicates with the second passage, and a sensor may detect the temperature or pressure of the refrigerant in the second passage or the temperature and pressure.
For the battery cooling system, the heat exchanger 70 includes a third channel and a fourth channel (not shown in the figure), the third channel and the fourth channel are not communicated with each other, the first channel and the second channel of the electronic expansion valve and the third channel and the fourth channel of the heat exchanger 70 at least include the following two connection forms, the first channel and the second channel are communicated through the third channel, at this time, the refrigerant flows in the first channel, the second channel and the third channel, and the working medium flows in the fourth channel; and the second type, the first channel is communicated with the three channels, the second channel is communicated with the fourth channel, at the moment, the refrigerant circulates in the first channel and the third channel, and the working medium circulates in the second channel and the fourth channel. When the connection of the channel of the electronic expansion valve and the channel of the heat exchanger is in a first mode, namely the first channel is communicated with the second channel through a third channel, the working pressure or the temperature or the pressure and the temperature of the refrigerant in the second channel are detected by the sensor; when the connection between the channel of the electronic expansion valve and the channel of the heat exchanger is in the second mode, namely the first channel is communicated with the three channels, the second channel is communicated with the fourth channel, and the sensor detects the temperature or the pressure or the temperature and the pressure of the working medium in the second channel. In the embodiment, the electronic expansion valve comprises the sensor and forms part of the channels on the electronic expansion valve, which is equivalent to reducing the connection points of parts and pipelines, is beneficial to simplifying the assembly process and is beneficial to improving the tightness of the system; in this embodiment, the electronic expansion valve may detect the pressure and temperature parameters of the refrigerant or the pressure and temperature parameters of the working medium according to the connection of the pipelines, which is beneficial to improving the universality of the electronic expansion valve.
Fig. 5 to 10 are schematic structural diagrams of a first embodiment of an electronic expansion valve, where the electronic expansion valve includes an electric control part 1, a stator assembly 2, a valve body 3, a valve core assembly 4 and a sensor 5, in this embodiment, the electric control part 1 and the stator assembly 2 are arranged side by side on the same side of the valve body 3, that is, there is no space between the valve body 3 and the electric control part 1 for the stator assembly 2, which is beneficial to compact structure of the electronic expansion valve, so that the radial dimension of the electronic expansion valve is miniaturized, and the electric control part 1 and the stator assembly 2 are fixedly connected with the valve body 3. The electronic expansion valve further comprises a pressing plate 68, the pressing plate 68 is approximately L-shaped in cross section, one part of the pressing plate 68 is fixedly connected with the stator assembly 2, and the other part of the pressing plate 68 is fixedly connected with the valve body 3 through a screw 69, so that the stator assembly 2 and the valve body 3 are fixed through the pressing plate.
The electric control part 1 comprises a cover body 101 and an electric control board 102 (see fig. 8, etc.), the cover body 101 forms a cover body inner cavity, the electric control board 102 is arranged in the cover body inner cavity, the cover body 101 comprises a lower shell 111 and an upper shell 112, the lower shell 111 and the upper shell 112 are respectively and independently formed, the lower shell 111 and the stator assembly 2 are integrally injection molded in the embodiment, the upper shell 112 and the lower shell 111 are fixedly connected through ultrasonic welding, the electric control board 102 is provided with an electric element and a circuit (not shown in the drawing), the electric control board 102 can conduct electricity, in the embodiment, the lower shell 111 is formed with a through hole 113, and the sensor 5 penetrates through the through hole 113 to enter the cover body inner cavity to be electrically connected with the electric control board 102. The stator assembly 2 and the sensor 5 are directly electrically connected with the electric control board 102, so that the sensor 5 is integrated in the electronic expansion valve, the function of the electronic expansion valve is more perfect, meanwhile, the electronic expansion valve provides a mounting and fixing structure of the sensor, the fixing of the sensor is facilitated, in addition, the number of connecting points of the electronic expansion valve and the cooling system is reduced, and the sealing performance of the cooling system is improved.
Referring to fig. 8, the valve body assembly 4 includes a valve seat 41, a valve body 42, and a rotor assembly 43, the valve seat 41 is fixedly disposed with respect to the valve body 3, the valve seat 41 is formed with a valve port 44, the valve body 42 moves with respect to the valve seat 41 and controls the opening degree of the valve port 44, and the electric control part 1 controls the movement of the valve body 42 by controlling the stator assembly 2 and the rotor assembly 43.
In this embodiment, the sensor 5 includes a main body 51, a sensing head 52 and a pin 53, where the sensing head 52 and the pin 53 are respectively disposed at two ends of the main body 51, the sensing head 52 is used for sensing the temperature or pressure or both the temperature and the pressure of the environment where the sensing head 52 is located, the pin 53 is electrically connected with the electric control board 102, in this embodiment, the pin 53 is a press-fit pin, so that the pin 53 is electrically connected with the electric control board 102 through press-fit, and the sensor 5 and the electric control board 102 are assembled without welding, so long as the jack of the electric control board 102 corresponds to the pin 53 and is press-fit, the process can be simplified, and meanwhile, the condition of virtual welding is avoided.
In this embodiment, the body 51 includes a guiding portion 511 and a main body portion 512, the guiding portion 511 is connected with the pin 53, the outer diameter of the guiding portion 511 is smaller than the outer diameter of the main body portion 512, so that a first step surface 521 is formed between the guiding portion 511 and the main body portion 512, the guiding portion 511 and the pin 53 extend into the inner cavity of the housing through the through hole 113, the first step surface 521 limits the length of the main body 51 extending into the inner cavity of the housing, the first step surface 521 contacts with the outer surface of the lower housing 11 and is welded and fixed by ultrasonic waves to form a seal, and the guiding portion 511 extending into the inner cavity of the housing is arranged, so that the length of the pin 53 is not too long to be connected with the electronic control board 102 conveniently, and the connection strength is reduced. Of course, under the condition that the connection between the sensor 5 and the electric control board 102 is not affected, the guide part is not required, so that only the pin 53 stretches into the inner cavity of the cover body, and the specific scheme is as shown in fig. 17, the main body 51 does not comprise the guide part, so that the cost of the sensor 5 is reduced, meanwhile, when the electric control board 102 is close to the outer surface of the lower shell 111, the strength of the pin 53 is not affected, and in such a structure, the through hole 113 of the lower shell 111 only needs to pass through the pin 53, and the sealing of the through hole 113 is realized by welding.
The body 51 further includes a flange portion 513 and a connecting portion 514, the connecting portion 514 is connected to the induction head 52, the flange portion 513 is disposed between the main body portion 512 and the connecting portion 514, in this embodiment, the outer diameter of the flange portion 513 is larger than the outer diameter of the main body portion 512, the outer diameter of the connecting portion 514 is smaller than the outer diameter of the main body portion 512, a second step surface 534 is formed between the connecting portion 514 and the lower end surface of the flange portion 513, and the body 51 of the sensor is connected to the valve body 3.
Referring to fig. 3, 4 and 21 in combination, the valve body 3 includes a first inlet 11, a first outlet 13, a second inlet 12, a second outlet 14, a first chamber 15 and a second chamber 16, a first channel 17 is formed between the first inlet 11 and the first outlet 13, a second channel 18 is formed between the second inlet 12 and the second outlet 14, the first inlet 11 and the second outlet 14 are located on the same side of the valve body 3, the first outlet 13 and the second inlet 14 are located on the same side of the valve body 3 to ensure smooth refrigerant flow, a valve core 42 is disposed in the first chamber 15 communicating with the first channel 17, and at least a sensing head 52 of the sensor 5 is located in the second chamber 16 communicating with the second channel 18.
In the present embodiment, the valve body 3 includes a first side wall 31, a first bottom portion 32, and a second bottom portion 33 corresponding to the second chamber 16, and the first side wall 31 is formed with an internal thread portion 34.
The electronic expansion valve further comprises a first limiting portion 9, the first limiting portion 9 limiting at least the movement of the sensor 5 relative to the valve body 3 in the axial direction of the sensor 5. In this embodiment, the first limiting portion 9 includes the communication hole 91 and the external thread section 92, the main body portion 512 of the sensor can pass through the communication hole 91, the flange portion 513 cannot pass through the communication hole 91, the lower end face of the flange portion 513 contacts with the first bottom 32 of the valve body 3, the first limiting portion 9 is sleeved on the periphery of the main body portion 512 and limited by the flange portion 513, the external thread section 92 is in threaded connection with the internal thread section 34, so that the sensor is fixed on the valve body, the reliability of connection between the sensor and the valve body through threaded connection is higher than that of other modes, and the looseness of the sensor caused by different working conditions in the use process of the electronic expansion valve is reduced.
In order to improve the tightness between the valve body and the sensor, a sealing ring 96 is arranged between the sensor 5 and the valve body 3, and the sealing ring 96 is pressed between the second step surface 534 and the second bottom 33 of the valve body; this serves as a seal, reducing the risk of leakage of working medium or refrigerant from the second channel through the second chamber
In order to limit the relative rotation of the sensor and the valve body, the electronic expansion valve further comprises a second limiting part, the second limiting part comprises a limiting pin 82, a first mounting part 83 and a second mounting part 84, the first mounting part 83 is a concave part formed at the first bottom 32, the concave part is in a barrel shape, the diameter of an opening part of the concave part is slightly larger than that of the limiting pin 82, the second mounting part 83 is a notch formed at the flange part 513, the concave part corresponds to the notch part and the limiting pin 82 is mounted, and therefore the sensor is limited to rotate relative to the valve body, and the position of the electronic control plate relative to the valve body is fixed, so that the corresponding position of the pin needle and the electronic control plate is facilitated.
When the electronic expansion valve in this embodiment works, the refrigerant enters the first channel 17 through the first inlet 11, the valve seat 41 is arranged in the first cavity 15, the valve seat 41 is formed with the valve port 44, the valve core 42 controls the opening of the valve port 44 to further control the flow rate of the refrigerant in the first channel 17, the refrigerant leaves the first channel 17 through the first outlet 13, the refrigerant or working medium enters the second channel 18 through the second inlet 12, and the sensing head 52 of the sensor 5 detects the pressure or the temperature or the pressure and temperature parameters in the second channel 18 and feeds back the signal to the electronic control board 102.
Fig. 18 to 20 are schematic views of an assembly flow of the electronic expansion valve according to the first embodiment; the electronic expansion valve comprises a stator assembly, an electric control part, a valve core assembly, a sensor and a valve body, wherein the electric control part comprises an electric control plate and a cover body, and the manufacturing method of the electronic expansion valve comprises the following steps of:
a1, mounting a valve core assembly on a valve body;
a2, fixing the sensor and the valve body;
a3, fixing the stator assembly and the valve body;
a4, installing an electric control plate and electrically connecting the electric control plate with the stator assembly and the sensor;
a5, fixedly connecting a cover body for accommodating the electric control plate.
The valve core assembly in the step a1 comprises a valve core, a valve seat and a rotor assembly, and the step a1 comprises the assembly of the valve core assembly.
Step a2 further comprises installing a limiting pin, firstly placing the limiting pin on the valve body, then placing the sensor at the first bottom of the valve body, sleeving the first limiting part, and connecting the first limiting part with the valve body in a threaded manner.
Step a2 further comprises placing a sealing ring on the second bottom part before placing the sensor.
Fig. 11 to 12 are schematic structural views of a second embodiment of an electronic expansion valve, which is different from the first embodiment in that: the valve body 3 comprises a first side wall 31, a first bottom 32 corresponding to the second cavity; the first side wall 31 is formed with a groove 311, and the electronic expansion valve comprises a first limiting part 9, and the first limiting part 9 at least limits the movement of the sensor relative to the valve body along the axial direction of the sensor; the first limiting part 9 comprises a clamp spring 901; the lower surface of flange portion 513 of sensor 5 contacts with first bottom 31, and the periphery of main part 512 is located to jump ring 901 cover, and the diameter of the hole of jump ring 901 is slightly greater than the external diameter of main part 512 and is less than the external diameter of flange portion 513, and jump ring 901 imbeds in the recess 311 of first lateral wall 31, and the lower terminal surface of jump ring 901 compresses tightly with the up end of flange portion 513, and then compresses tightly sensor 5 in first bottom 31, and then with sensor 5 and valve body 3 axial fixed connection, the sensor is with the removal along the sensor axial of valve body of limiting. Compared with the first embodiment, the sensor and the valve body are fixed by the clamp spring in the embodiment, and the cost is reduced under the condition that the connection strength is ensured.
The electronic expansion valve further comprises a second limiting portion, wherein the second limiting portion comprises a limiting pin 82, a first mounting portion and a second mounting portion, the first mounting portion is a concave portion formed in the first bottom 32, the concave portion is barrel-shaped, the diameter of an opening portion of the concave portion is slightly larger than that of the limiting pin 82, the second mounting portion 8 is a notch formed in the flange portion 513, the concave portion corresponds to the notch portion and is used for mounting the limiting pin 82, rotation of the sensor relative to the valve body is limited, and due to the fact that the position of the electric control plate relative to the valve body is fixed, the corresponding position of a pin needle and the electric control plate is facilitated.
In the present embodiment, the connecting portion 514 of the sensor 5 is formed with an annular groove 5141, the seal ring 96 is disposed in the annular groove 5141, and the seal ring 96 is compressed and deformed in the radial direction by the sensor 5 and the valve body 3 to form a seal; such a configuration further facilitates the installation of the seal ring 96.
The manufacturing method of the electronic expansion in the present embodiment differs from the manufacturing method of the electronic expansion valve of the first embodiment in that: step a2 includes installing a limiting pin, placing the sensor at the first bottom of the valve body, sleeving the clamp spring, and embedding the clamp spring in the annular groove 5141 of the valve body 3.
Fig. 13 to 14 show a third embodiment of the electronic expansion valve, which is mainly different from the second embodiment in this example: the valve body 3 comprises a first side wall 31, a first bottom 32 corresponding to the second cavity; the electronic expansion valve comprises a first limiting part 9, and the first limiting part 9 at least limits the movement of the sensor relative to the valve body along the axial direction of the sensor; the first limiting part 9 comprises welding of the upper surface of the flange part 513 and the valve body 3; the lower surface of the flange portion 513 of the sensor contacts the first bottom 32, and the upper surface of the flange portion 513 is welded to the valve body 3, so that the sensor and the valve body are fixed by welding in this embodiment, and the second limiting portion is not required, so that under the condition of ensuring the connection strength, no additional parts are required, the structure of the product is simplest, and thus the cost is reduced.
Fig. 15 to 16 show a fourth embodiment of the electronic expansion valve, and in this example, the main difference is that, compared with the first embodiment: the length of the sensor 5 is increased, the electric control plate 102 is located in the axial direction of the stator assembly 5, so that the area of the electric control plate 102 is increased, the arrangement of the connection point of the sensor 5 is facilitated, meanwhile, the stator assembly 2 can be enabled to extend radially, and the size of the electronic expansion valve is reduced under the condition that the large-area electric control plate 102 is ensured. The connection between the other sensors and the valve body and the electric control section may be the same as those of the first, second and third embodiments.
The method of manufacturing the electronic expansion valve according to the fourth embodiment is the same as the method of manufacturing the electronic expansion valve according to one of the first, second, and third embodiments.
It should be noted that: 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 equivalent thereto without departing from the spirit and scope of the invention, and all such modifications and improvements thereof are intended to be included within the scope of the appended claims.

Claims (10)

1. The utility model provides an electronic expansion valve, includes case subassembly, automatically controlled portion and stator module, the case subassembly includes disk seat, case and rotor subassembly, the disk seat is formed with the valve port, the case can for the disk seat motion and change the aperture of valve port, automatically controlled portion can control stator module, the rotor subassembly drives the motion of case, its characterized in that: the electronic expansion valve further comprises a sensor, the electronic control part comprises an electronic control plate, the stator assembly and the sensor are respectively and electrically connected with the electronic control plate, the electronic control part and the stator assembly are arranged on the same side of the valve body side by side, the electronic control plate and the sensor are vertically arranged, and the sensor and the central shaft of the valve core are arranged in parallel.
2. The electronic expansion valve of claim 1, wherein: the sensor comprises a body, a sensing head and pin needles, wherein the sensing head and the pin needles are respectively arranged at two ends of the body, and the pin needles are directly connected with the electric control board.
3. The electronic expansion valve of claim 1, wherein: the electric control part further comprises a cover body, a cover body inner cavity is formed in the cover body, the electric control plate is arranged in the cover body inner cavity, the cover body comprises an upper shell and a lower shell, the upper shell and the lower shell are respectively formed and fixedly connected, the lower shell is fixedly injection-molded with the stator assembly, the lower shell is formed with a through hole, at least the pin can penetrate through the through hole, and the sensor is welded and sealed with the lower shell at the position of the through hole.
4. The electronic expansion valve of claim 3, wherein: the body includes guiding portion and main part, the diameter of guiding portion is less than the diameter of main part, guiding portion with be formed with the step face between the main part, at least part the bore of through-hole is less than the diameter of main part, guiding portion with the pin needle is connected, the main part is located guiding portion with between the pin needle, guiding portion with the pin needle all passes the through-hole gets into the cover body inner chamber, the step face restriction the sensor stretches into the distance of cover body inner chamber, main part with lower casing welded seal.
5. The electronic expansion valve of claim 4, wherein: the electronic expansion valve further comprises a valve body, the valve body comprises a first inlet, a first outlet, a second inlet and a second outlet, a first channel is formed between the first inlet and the first outlet, a second channel is formed between the second inlet and the second outlet, at least a part of the valve seat is arranged in the first channel or a first cavity communicated with the first channel, the induction head is arranged in the second channel or a second cavity communicated with the second channel, and the sensor is directly welded and fixedly connected with the valve body and sealed or fixedly connected and sealed through a first limiting part which at least can limit the rotation of the sensor and the valve body.
6. The electronic expansion valve of claim 5, wherein: the first limiting part comprises a communication hole and an external thread section, the main body part of the sensor can penetrate through the communication hole, the position of the valve body corresponding to the second cavity comprises an internal thread section, the body further comprises a flange part, the flange part is located between the main body part and the pin, the outer diameter of the flange part is larger than that of the main body part, the flange part cannot pass through the communication hole, the lower end face of the flange part is in contact with the valve body, the first limiting part is sleeved on the periphery of the main body part and is limited by the flange part, and the external thread section is in threaded connection with the internal thread section.
7. The electronic expansion valve of claim 6, wherein: the sensor with be provided with the sealing washer between the valve body, the body still includes connecting portion, connecting portion is located between flange portion and the inductive head, connecting portion's diameter is less than the diameter of main part, connecting portion with the lower terminal surface of flange forms step portion, the sealing washer press in between the lower terminal surface of flange and the valve body.
8. The electronic expansion valve of claim 6 or 7, wherein: the electronic expansion valve further comprises a limiting pin, the valve body is provided with a first mounting portion, the flange portion is provided with a second mounting portion, the limiting pin is mounted between the first mounting portion and the second mounting portion, and the limiting pin limits the mounting position of the sensor relative to the valve body.
9. The electronic expansion valve of claim 5, wherein: the first limiting part comprises a clamp spring and a limiting pin, the valve body is provided with an annular groove, the body comprises a flange part, the clamp spring can be embedded in the annular groove, the clamp spring limits the flange part to move above the valve body, the lower end face of the flange part is in contact with the valve body, the valve body comprises a first mounting part, the flange part comprises a second mounting part, and the limiting pin is arranged between the first mounting part and the second mounting part.
10. The electronic expansion valve of claim 9, wherein: the sensor with be provided with the sealing washer between the valve body, the body still includes connecting portion, connecting portion is located main part with between the inductive head, the diameter of connecting portion is less than the diameter of main part, connecting portion are provided with annular groove, the sealing washer is located annular groove.
CN202410389957.3A 2017-05-09 2017-05-09 Electronic expansion valve Pending CN118346807A (en)

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