CN111255933A

CN111255933A - Electronic expansion valve, thermal management assembly, cooling system and electronic expansion valve manufacturing method

Info

Publication number: CN111255933A
Application number: CN202010040763.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2017-05-09
Filing date: 2017-05-09
Publication date: 2020-06-09
Also published as: CN110953390A; CN108869830A

Abstract

An electronic expansion valve and a manufacturing method thereof, a heat management assembly and a cooling system are provided, the electronic expansion valve comprises a valve core assembly, an electric control part and a stator assembly, the valve core assembly comprises a valve core and a rotor assembly, the electronic expansion valve is provided with a valve port, the valve core moves relative to the valve port and changes the opening degree of the valve port, the electric control part controls the stator assembly, the rotor assembly drives the valve core to move, the electronic expansion valve also comprises a sensor, the electric control part comprises an electric control board, the stator assembly and the sensor are directly and electrically connected with the electric control board, and the heat management assembly and; convenient equipment reduces and reveals.

Description

Electronic expansion valve, thermal management assembly, cooling system and electronic expansion valve manufacturing method

This application is a divisional application for patent application No. 201710319514.7.

[ technical field ] A method for producing a semiconductor device

The invention relates to a cooling system and a structure and a method of parts thereof.

[ background of the invention ]

The cooling system includes a compressor, an evaporator, a condenser and a throttling element, and in order to improve the flow control accuracy of the working medium, an electronic expansion valve is adopted as the throttling element in the prior art. In general, the control of the electronic expansion is carried out by collecting parameters by means of pressure and temperature sensors arranged on the lines, and calculating the degree of superheat by means of a controller according to a corresponding control program. Therefore, the sensor and the electronic expansion valve are respectively connected with the cooling system through pipelines, so that the cooling system is cooled, and the assembly process is complex.

Therefore, there is a need for improvement of the prior art to solve the above technical problems.

[ summary of the invention ]

The invention aims to provide an electronic expansion valve, a manufacturing method thereof, a thermal management assembly and a cooling system, which have the advantages of high product integration level, convenience in assembly and reduction of connecting wire harnesses.

To achieve the above object, the present invention discloses

An electronic expansion valve comprises a valve core assembly, an electric control part and a stator assembly, wherein the valve core assembly comprises a valve core and a rotor assembly, a valve port is formed in the electronic expansion valve, the valve core can move relative to the valve port and change the opening degree 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 electric control part comprises an electric control board, the stator assembly and the sensor are electrically connected with the electric control board, and the sensor can detect the temperature or the pressure or the temperature and the pressure of a working medium.

The sensor comprises a body, an induction head and pin needles, wherein the induction head and the pin needles are respectively arranged at two ends of the body, and the pin needles are directly electrically connected with the electric control board.

The automatically controlled portion still includes the cover body, the cover body is formed with cover body inner chamber, automatically controlled board sets up in cover body inner chamber, the cover body includes casing and lower casing, go up the casing with the casing takes shape respectively and fixed connection down, the casing is formed with the through-hole down, at least the pin needle can pass the through-hole position, the sensor with casing welded seal down.

The body includes guide part and main part, the diameter of guide part is less than the diameter of main part, the guide part 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, the guide part with the pin needle is connected, the main part is located the guide part with between the pin needle, the guide part with the pin needle all passes the through-hole gets into cover body inner chamber, the restriction of step face the sensor stretches into cover body inner chamber's distance, the main part with casing welded seal down.

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, the valve core assembly comprises a valve seat, at least part of the valve seat is arranged in the first channel or a first cavity communicated with the first channel, the induction head is positioned in the second channel or a second cavity communicated with the second channel, the sensor is directly fixedly connected and sealed with the valve body or fixedly connected and sealed through a first limiting part, and the first limiting part can at least limit the rotation of the sensor and the valve body.

The first spacing portion comprises a communication hole and an external thread section, the main body portion of the sensor can penetrate the communication hole, the valve body corresponds to the position of the second cavity comprises an internal thread section, the body further comprises a flange portion, the flange portion is located between the main body portion and the pin needle, the outer diameter of the flange portion is larger than that of the main body portion, the flange portion cannot pass through the communication hole, the lower end face of the flange portion is in contact with the valve body, the first spacing portion is sleeved on the periphery of the main body portion and is limited through the flange portion, and the external thread section is in threaded connection with the internal thread section.

The sensor with be provided with the sealing washer between the valve body, the body still includes connecting portion, connecting portion are located between flange portion and the inductive head, the diameter of connecting portion 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.

The electronic expansion valve further comprises a limiting pin, the valve body is provided with a first installation part, the flange part is provided with a second installation part, the limiting pin is installed between the first installation part and the second installation part, and the limiting pin limits the sensor relative to the installation position of the valve body.

First spacing portion includes jump ring and spacer pin, the valve body is provided with the ring channel, the body includes flange portion, the jump ring can inlay in the ring channel, the jump ring is injectd flange portion to the removal of valve body top, the lower terminal surface of flange portion with the valve body contact, the valve body includes first installation department, flange portion includes the second installation department, the spacer pin set up in first installation department with between the second installation department.

The sensor with be provided with the sealing washer between the valve body, the body still includes connecting portion, connecting portion are located the 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 the annular groove, the sealing washer is located the annular groove.

The lower shell and the stator assembly are fixed in an injection molding mode, the electric control portion 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 is parallel to a central shaft of the valve core.

The lower shell and the stator assembly are fixed in an injection molding mode, the electric control portion and the stator assembly are arranged on the same side of the valve body in parallel, the electric control plate is perpendicular to the sensor, and the sensor is arranged in parallel with the central shaft of the valve core.

The application also discloses a heat management assembly, which comprises an electronic expansion valve and a heat exchanger, wherein the electronic expansion valve and the heat exchanger are connected into an integrated unit, the electronic expansion valve comprises a first inlet, a second inlet, a first outlet and a second outlet, the electronic expansion valve comprises a valve core assembly, a stator assembly, an electric control part and a sensor, the valve core assembly comprises a valve core and a rotor assembly, a valve port is arranged between the first inlet and the first outlet, the valve core and the valve port are matched to change the flow of a working medium in a first channel, the electric control part comprises an electric control board, the sensor comprises a main body part, an induction head and a pin, the induction head is arranged between the second inlet and the second outlet to form a second channel or the induction head is arranged between the second inlet and the second outlet, the second channel or a second cavity communicated with the second channel, and the pin needle is electrically connected with the electric control board.

The heat exchanger comprises a third channel and a fourth channel, the third channel is not communicated with the fourth channel, and the first channel is communicated with the second channel through the third channel.

The heat exchanger comprises a third channel and a fourth channel, the third channel is not communicated with the fourth channel, the first channel is communicated with the third channel, and the second channel is communicated with the fourth channel.

The application also discloses a manufacturing method of the electronic expansion valve, the electronic expansion valve comprises a stator assembly, an electric control part, a valve core assembly, a sensor and a valve body, the valve core assembly comprises a valve core and a rotor assembly, the electric control part comprises an electric control plate and a cover body, and the method comprises the following steps:

a1, mounting the valve core assembly on the valve body;

a2, fixing the sensor and the valve body;

a3, fixing the stator assembly and the valve body;

a4, mounting an electric control board, and electrically connecting the electric control board with the stator assembly and the sensor;

a5, sealing of the housing that will be used to house the electronic control board.

The application also discloses cooling system, including compressor, evaporimeter, condenser and first electronic expansion valve, first electronic expansion valve set up in the condenser with between the evaporimeter, its characterized in that: the first electronic expansion valve comprises a valve core assembly, a stator assembly, an electric control part and a sensor, the valve core assembly comprises a valve core and a rotor assembly, the electric control part comprises an electric control board, the first electronic expansion valve comprises a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet and the first outlet form a first passageway therebetween, and the second inlet and the second outlet form a second passageway therebetween, the first electronic expansion valve comprises a valve port, the valve core is matched with the valve port to change the flow of the refrigerant of the first channel, the sensor comprises a main body part, an induction head and a pin, the induction head is arranged in the second channel or a second cavity communicated with the second channel, the pin is directly electrically connected with the electric control board, and the evaporator is communicated with the first channel and the second channel.

The cooling system further comprises a battery cooling system, the battery cooling system comprises a heat management assembly, the heat management assembly comprises a heat exchanger and a second electronic expansion valve, the second electronic expansion valve is integrated with the heat exchanger, the second electronic expansion valve comprises a valve core assembly, a stator assembly, an electronic control part and a sensor, the valve core assembly comprises a valve core, a valve seat and a rotor assembly, the electronic control part comprises an electronic control board, the first electronic expansion valve comprises a first inlet, a second inlet, a first outlet 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 part of the valve seat is arranged in the first channel or a first cavity communicated with the first channel, and the valve core and the valve seat are matched to control the flow of a refrigerant of the first channel, the sensor comprises a main body part, an induction head and a pin, the induction head is arranged in the second channel or a second cavity communicated with the second channel, the pin is directly electrically connected with the electric control board, the heat exchanger comprises a third channel and a fourth channel which are isolated from each other, the first channel is communicated with the second channel through the third channel or the first channel is communicated with the third channel, and the second channel is communicated with the fourth channel.

The electronic expansion valve is integrated to have the sensor among the technical scheme of this application, through with sensor and automatically controlled board lug connection, is integrated as a whole with sensor and electronic expansion valve, reduces the connecting wire bundle, and the equipment is convenient.

[ description of the drawings ]

FIG. 1 is a schematic view of one embodiment including a cooling system;

FIG. 2 is a schematic structural diagram 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 perspective view of an alternative embodiment of an electronic expansion valve;

FIG. 5 is a schematic front view of a first embodiment of an electronic expansion valve;

FIG. 6 is a schematic diagram of a right side view of the electronic expansion valve of FIG. 5;

FIG. 7 is a schematic diagram of a top view of the electronic expansion valve of FIG. 5;

FIG. 8 is a schematic cross-sectional view taken along line B-B of the electronic expansion valve of FIG. 6;

fig. 9 is a schematic sectional view taken along the line a-a of the electronic expansion valve of fig. 5;

fig. 10 is a schematic cross-sectional view taken along direction D-D of the electronic expansion valve of fig. 5;

fig. 11 is a schematic front 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 front 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 front 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 assembly step of the electronic expansion valve;

fig. 20 is a schematic view of a third assembly step of 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 ] embodiments

The invention will be further described with reference to the following figures and specific examples:

the cooling system is mainly applied to vehicles or household appliances, and will be described below as a cooling system for a vehicle, which includes at least an air conditioning system, but of course, as the battery is applied to the vehicle, the cooling system for the vehicle may also include a battery cooling system. When the cooling system works, the air conditioning system comprises a refrigerant which circularly flows, and the battery cooling system comprises a working medium which circularly flows, wherein the working medium can be water, oil, a mixture containing water or oil, the refrigerant and the like.

Fig. 1 is a schematic diagram of an embodiment of a cooling system, in this example, the cooling system includes an air conditioning system and a battery cooling system, the air conditioning system includes a compressor 10, a condenser 20, a first electronic expansion valve 30, and an evaporator 40; when the air conditioning system works, the refrigerant is compressed into a high-temperature high-pressure refrigerant by the compressor 10, the high-temperature high-pressure refrigerant is radiated by the condenser 20 to become a normal-temperature high-pressure refrigerant, and the normal-temperature 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 and changed into 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 comprises a heat management assembly 50 and a pump 60, wherein refrigerant in the air conditioning system exchanges heat with working medium of the battery cooling system in the heat management assembly 50, and the pump 60 provides power for the working medium of the battery cooling system to move circularly.

Fig. 2 is a schematic structural diagram of an embodiment of the 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, refrigerant in the air conditioning system exchanges heat with a working medium of the battery cooling system in the heat exchanger 70, in this embodiment, the structure of the first electronic expansion valve 30 is the same as that of the second electronic expansion valve 80, and the first electronic expansion valve 30 and the second electronic expansion valve 80 are collectively referred to as an electronic expansion valve for description. Of course, the first electronic expansion valve and the second electronic expansion valve may have different structures, 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 has the same structure as the electronic expansion valve of the present invention, which is within the protection 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, and a second passage is formed between the second inlet 12 and the second outlet 14, and includes a sensor including a sensing head disposed in the second passage or a chamber directly communicating with the second passage, such that the sensor can detect a temperature or a pressure or both of a refrigerant or a working medium in the second passage.

For an air conditioning system, the evaporator 40 includes a third passage and a fourth passage, the first passage communicating with the third passage, the third passage communicating with the fourth passage, and the fourth passage communicating with the second passage, and the sensor may detect the temperature or pressure or both of the temperature and pressure of the refrigerant in the second passage.

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 is communicated with the second channel through the third channel, at this time, all the refrigerant circulates in the first channel, the second channel and the third channel, and the working medium circulates in the fourth channel; in the second mode, the first channel is communicated with the three channels, the second channel is communicated with the fourth channel, at the moment, refrigerant flows in the first channel and the third channel, and working medium flows in the second channel and the fourth channel. When the connection between 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, and the working pressure or temperature or pressure and temperature of the refrigerant in the second channel is 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 temperature or the pressure or the temperature and the pressure of the working medium in the second channel are detected by the sensor at the moment. In the embodiment, the electronic expansion valve comprises the sensor, and part of the channel is formed on the electronic expansion valve, which is equivalent to reducing the connection points of parts and pipelines, thus being beneficial to simplifying the assembly process and improving the sealing property of the system; in this embodiment, the electronic expansion valve can detect the pressure and temperature parameters of the refrigerant or the pressure and temperature parameters of the working medium according to different connections 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 the electronic expansion valve, where the electronic expansion valve includes an electric control portion 1, a stator assembly 2, a valve body 3, a valve core assembly 4 and a sensor 5, in this embodiment, the electric control portion 1 and the stator assembly 2 are disposed side by side on the same side of the valve body 3, that is, there is no interval stator assembly 2 between the valve body 3 and the electric control portion 1, a space parallel to the stator assembly is utilized, which is beneficial to compact structure of the electronic expansion valve, so that the radial size of the electronic expansion valve is miniaturized, and both the electric control portion 1 and the stator assembly 2 are fixedly connected to the valve. The electronic expansion valve further comprises a pressure plate 68, the cross section of the pressure plate 68 is approximately L-shaped, one part of the pressure plate 68 is fixedly connected with the stator assembly 2, the other part of the pressure plate 68 is fixedly connected with the valve body 3 through a screw 69, and therefore the stator assembly 2 and the valve body 3 are fixed through the pressure plate.

The electric control part 1 comprises a cover body 101 and an electric control board 102 (see fig. 8 and the like), 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 formed separately, in the embodiment, the lower shell 111 and the stator assembly 2 are integrally formed in an injection molding mode, 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 figure), so that 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. Stator module 2 and sensor 5 all directly are connected with automatically controlled board 102 electricity, integrate sensor 5 in electronic expansion valve like this for electronic expansion valve's function is more perfect, and electronic expansion valve provides the installation fixed knot who installs the structure of sensor simultaneously, is favorable to the fixed of sensor, and the tie point that such electronic expansion valve is connected with cooling system reduces in addition, is favorable to improving cooling system's leakproofness.

Referring to fig. 8, the valve core assembly 4 includes a valve seat 41, a valve core 42 and a rotor assembly 43, the valve seat 41 is fixedly disposed relative to the valve body 3, the valve seat 41 forms a valve port 44, the valve core 42 moves relative to the valve seat 41 and controls the opening degree of the valve port 44, and the electric control portion 1 controls the movement of the valve core 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, 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 the pressure or the temperature and the pressure of the environment where the sensing head is located, the pin 53 is electrically connected to the electronic control board 102, in this embodiment, the pin 53 is a press-fit pin, so the pin 53 is electrically connected to the electronic control board 102 through the press-fit, so that the sensor 5 and the electronic control board 102 are assembled without welding, as long as the jack of the electronic control board 102 corresponds to the pin 53 and is in press-fit, the process can be simplified, and meanwhile, the condition of virtual welding is avoided.

In this embodiment, the body 51 includes a guide portion 511 and a main body portion 512, the guide portion 511 is connected to the pin 53, the outer diameter of the guide 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 guide portion 511 and the main body portion 512, the guide portion 511 and the pin 53 pass through the through hole 113 and extend into the inner cavity of the housing, 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 ultrasonically welded and fixed to form a seal, and the guide portion 511 extending into the inner cavity of the housing is provided, so that the length of the pin 53 is not too long to be conveniently connected to the electronic control board 102, and the connection strength is further. Certainly, under the condition that the connection between the sensor 5 and the electric control board 102 is not affected, the guide part is not needed, and only the pin 53 extends into the inner cavity of the cover body, the specific scheme is as shown in fig. 17, the main body 51 does not include the guide part, so that the cost of the sensor 5 is favorably reduced, and meanwhile, the strength of the pin 53 is not affected when the electric control board 102 is closer to the outer surface of the lower shell 111, so that the through hole 113 of the lower shell 111 only needs to penetrate through the pin 53, and the sealing of the through hole 113 is achieved by welding.

The main body 51 further includes a flange portion 513 and a connecting portion 514, the connecting portion 514 is connected to the inductive head 52, the flange portion 513 is disposed between the main body 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 512, the outer diameter of the connecting portion 514 is smaller than the outer diameter of the main body 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 main body 51 of the sensor is connected to the valve body 3.

Referring to fig. 3, 4 and 21, the valve body 3 includes a first inlet 11, a first outlet 13, a second inlet 12, a second outlet 14, a first cavity 15 and a second cavity 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 circulation, the valve element 42 is disposed in the first cavity 15 communicated with the first channel 17, and at least the sensing head 52 of the sensor 5 is located in the second cavity 16 communicated with the second channel 18.

In the present embodiment, the valve body 3 includes a first side wall 31, a first bottom 32, and a second bottom 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 includes a first limit portion 9, and the first limit portion 9 at least limits 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 a communication hole 91 and an external thread section 92, the main body 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 surface 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 512 and is 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 to the valve body, the reliability of fixing the sensor and the valve body by threaded connection is higher than that of other modes, and the looseness of the sensor caused by different working conditions during the use of the electronic expansion valve is reduced.

In order to improve the sealing performance 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 provides a sealing effect and reduces the risk of leakage of the working medium or refrigerant of 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 on 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 on the flange part 513, the concave part corresponds to the notch part and the limiting pin 82 is mounted, so that the rotation of the sensor relative to the valve body is limited, and the position of the electric control plate relative to the valve body is fixed, so that the corresponding position of the pin and the electric control plate is convenient.

When the electronic expansion valve in this embodiment operates, refrigerant enters the first channel 17 through the first inlet 11, the valve seat 41 is disposed in the first cavity 15, the valve seat 41 is formed with a valve port 44, the valve element 42 controls the opening degree 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 temperature or 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 assembly flow diagrams of the electronic expansion valve according to the first embodiment; the electronic expansion valve comprises a stator component, an electric control part, a valve core component, 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:

a1, mounting the valve core assembly on the valve body;

a2, fixing the sensor and the valve body;

a3, fixing the stator assembly and the valve body;

a5, fixedly connecting the cover body for accommodating the electric control board.

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 still includes the installation spacer pin, and the spacer pin is earlier placed on the valve body, places the sensor in the first bottom of valve body again, and the first spacing portion of suit to with first spacing portion and valve body threaded connection.

Step a2 also includes placing a gasket on the second bottom portion prior to placing the sensor.

Fig. 11 to 12 are schematic structural views of a second embodiment of an electronic expansion valve, and the main differences from the first embodiment are that: the valve body 3 comprises, in correspondence of the second chamber, a first side wall 31, a first bottom 32; the first side wall 31 is formed with a groove 311, 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 a flange portion 513 of the sensor 5 is in contact with the first bottom portion 31, a clamp spring 901 is sleeved on the periphery of the main body portion 512, the diameter of an inner hole of the clamp spring 901 is slightly larger than the outer diameter of the main body portion 512 and smaller than the outer diameter of the flange portion 513, the clamp spring 901 is embedded into a groove 311 of the first side wall 31, the lower end surface of the clamp spring 901 is pressed with the upper end surface of the flange portion 513, the sensor 5 is further pressed on the first bottom portion 31, the sensor 5 is further axially and fixedly connected with the valve body 3, and the sensor is limited to move relative to the valve. Compare with first kind of embodiment, fix sensor and valve body with the jump ring in this embodiment, under the circumstances of the intensity of guaranteeing to connect, be favorable to reduce cost like this.

The electronic expansion valve is the same as the first real-time mode, 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 installation part and a second installation part, the first installation part is a concave part formed in the first bottom 32, the concave part is in a barrel shape, the diameter of the opening part of the concave part is slightly larger than that of the limiting pin 82, the second installation part 8 is a notch formed in the flange part 513, the concave part corresponds to the notch part and the limiting pin 82 is installed, so that the rotation of the sensor relative to the valve body is favorably limited, and the electric control plate is fixed relative to the valve body, so that the corresponding positions of the pin and the electric control plate are convenient.

In addition, in the present embodiment, the connecting portion 514 of the sensor 5 is formed with the annular groove 5141, the sealing ring 96 is disposed in the annular groove 5141, and the sealing 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 facilitates installation of the seal ring 96.

The method for manufacturing the electronic expansion valve in the present embodiment is different from the method for manufacturing the electronic expansion valve in the first embodiment in that: step a2 includes installing a limit pin, placing the sensor at the first bottom of the valve body, sleeving the snap spring, and embedding the snap spring in the annular groove 5141 of the valve body 3.

Fig. 13 to 14 show a third embodiment of an electronic expansion valve, and in this embodiment, the main difference from the second embodiment is that: the valve body 3 comprises, in correspondence of the second chamber, a first side wall 31, a first bottom 32; the electronic expansion valve comprises a first limiting part 9, wherein 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 stopper 9 includes welding of the upper surface of the flange 513 to the valve body 3; the lower surface of the flange portion 513 of the sensor contacts with the first bottom portion 32, and the upper surface of the flange portion 513 is welded with the valve body 3, so that compared with the first embodiment, the sensor and the valve body are fixed by welding in the embodiment, a second limiting portion is not needed, under the condition that the connection strength is ensured, no additional part is needed, the structure of the product is simplest, and the cost is reduced.

Fig. 15 to 16 show a fourth embodiment of an electronic expansion valve, and in this embodiment, the main points of difference are as follows in comparison with the first embodiment: the length of the sensor 5 is increased, and 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 setting of a connection point of the sensor 5 is facilitated, meanwhile, the stator assembly 2 can extend in the radial direction, 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 manner of the other sensors, the valve body, and the electric control portion may be the same as that of the first, second, and third embodiments.

A method of manufacturing an electronic expansion valve according to a fourth embodiment is the same as the method of manufacturing an electronic expansion valve according to any 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-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims

1. An electronic expansion valve comprises a valve core assembly, an electric control part and a stator assembly, wherein the valve core assembly comprises a valve core and a rotor assembly, a valve port is formed on the electronic expansion valve, the valve core can move relative to the valve port and change the opening degree of the valve port, the electric control part can control the stator assembly, and the rotor assembly drives the valve core to move, and the electronic expansion valve is characterized in that: the electronic expansion valve further comprises a sensor, the electronic control part comprises an electronic control board, the stator assembly and the sensor are electrically connected with the electronic control board, and the sensor can detect the temperature or the pressure or the temperature and the pressure of the refrigerant.

2. The electronic expansion valve of claim 1, wherein: the sensor comprises a body, an induction head and pin needles, wherein the induction head and the pin needles are respectively arranged at two ends of the body, and the pin needles are directly electrically connected with the electric control board.

3. The electronic expansion valve of claim 1, wherein: the automatically controlled portion still includes the cover body, the cover body is formed with cover body inner chamber, automatically controlled board sets up in cover body inner chamber, the cover body includes casing and lower casing, go up the casing with the casing takes shape respectively and fixed connection down, the casing is formed with the through-hole down, at least the pin needle can pass the through-hole position, the sensor with casing welded seal down.

4. The electronic expansion valve of claim 3, wherein: the body includes guide part and main part, the diameter of guide part is less than the diameter of main part, the guide part 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, the guide part with the pin needle is connected, the main part is located the guide part with between the pin needle, the guide part with the pin needle all passes the through-hole gets into cover body inner chamber, the restriction of step face the sensor stretches into cover body inner chamber's distance, the main part with casing welded seal down.

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, the valve core assembly comprises a valve seat, at least part of the valve seat is arranged in the first channel or a first cavity communicated with the first channel, the induction head is positioned in the second channel or a second cavity communicated with the second channel, the sensor is directly fixedly connected and sealed with the valve body or fixedly connected and sealed through a first limiting part, and the first limiting part can at least limit the rotation of the sensor and the valve body.

6. The electronic expansion valve of claim 5, wherein: the first spacing portion comprises a communication hole and an external thread section, the main body portion of the sensor can penetrate the communication hole, the valve body corresponds to the position of the second cavity comprises an internal thread section, the body further comprises a flange portion, the flange portion is located between the main body portion and the pin needle, the outer diameter of the flange portion is larger than that of the main body portion, the flange portion cannot pass through the communication hole, the lower end face of the flange portion is in contact with the valve body, the first spacing portion is sleeved on the periphery of the main body portion and is limited through the flange portion, 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 are located between flange portion and the inductive head, the diameter of connecting portion 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. An electronic expansion valve according to claim 6 or 7, wherein: the electronic expansion valve further comprises a limiting pin, the valve body is provided with a first installation part, the flange part is provided with a second installation part, the limiting pin is installed between the first installation part and the second installation part, and the limiting pin limits the sensor relative to the installation position of the valve body.

9. The electronic expansion valve of claim 5, wherein: first spacing portion includes jump ring and spacer pin, the valve body is provided with the ring channel, the body includes flange portion, the jump ring can inlay in the ring channel, the jump ring is injectd flange portion to the removal of valve body top, the lower terminal surface of flange portion with the valve body contact, the valve body includes first installation department, flange portion includes the second installation department, the spacer pin set up in first installation department with between the second installation department.

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 are located the 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 the annular groove, the sealing washer is located the annular groove.

11. An electronic expansion valve according to any of claims 3 to 10, wherein: the lower shell and the stator assembly are fixed in an injection molding mode, the electric control portion 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 is parallel to a central shaft of the valve core.

12. An electronic expansion valve according to any of claims 3 to 10, wherein: the lower shell and the stator assembly are fixed in an injection molding mode, the electric control portion and the stator assembly are arranged on the same side of the valve body in parallel, the electric control plate is perpendicular to the sensor, and the sensor is arranged in parallel with the central shaft of the valve core.

13. A heat management assembly comprises an electronic expansion valve and a heat exchanger, wherein the electronic expansion valve and the heat exchanger are connected into an integrated unit, the electronic expansion valve comprises a first inlet, a second inlet, a first outlet and a second outlet, the electronic expansion valve comprises a valve core assembly, a stator assembly, an electric control part and a sensor, the valve core assembly comprises a valve core and a rotor assembly, a valve port is arranged between the first inlet and the first outlet, the valve core is matched with the valve port to change the flow of a working medium in a first channel, the electric control part comprises an electric control board, the sensor comprises a main body part, an induction head and a pin needle, the induction head is arranged between the second inlet and the second outlet to form a second channel or is arranged between the second inlet and the second outlet, and the second channel or a second cavity communicated with the second channel, the pin pins are electrically connected with the electric control board.

14. The thermal management assembly of claim 13, wherein: the heat exchanger comprises a third channel and a fourth channel, the third channel is not communicated with the fourth channel, and the first channel is communicated with the second channel through the third channel.

15. The thermal management assembly of claim 13, wherein: the heat exchanger comprises a third channel and a fourth channel, the third channel is not communicated with the fourth channel, the first channel is communicated with the third channel, and the second channel is communicated with the fourth channel.

16. A method for manufacturing an electronic expansion valve comprises a stator assembly, an electric control part, a valve core assembly, a sensor and a valve body, wherein the valve core assembly comprises a valve core and a rotor assembly, the electric control part comprises an electric control plate and a cover body, and the method comprises the following steps:

a1, mounting the valve core assembly on the valve body;

a2, fixing the sensor and the valve body;

a3, fixing the stator assembly and the valve body;

17. A cooling system, includes compressor, evaporimeter, condenser and first electronic expansion valve, first electronic expansion valve set up in the condenser with between the evaporimeter, its characterized in that: the first electronic expansion valve comprises a valve core assembly, a stator assembly, an electric control part and a sensor, the valve core assembly comprises a valve core and a rotor assembly, the electric control part comprises an electric control board, the first electronic expansion valve comprises a first inlet, a second inlet, a first outlet and a second outlet, wherein the first inlet and the first outlet form a first passageway therebetween, and the second inlet and the second outlet form a second passageway therebetween, the first electronic expansion valve comprises a valve port, the valve core is matched with the valve port to change the flow of the refrigerant of the first channel, the sensor comprises a main body part, an induction head and a pin, the induction head is arranged in the second channel or a second cavity communicated with the second channel, the pin is directly electrically connected with the electric control board, and the evaporator is communicated with the first channel and the second channel.

18. The cooling system of claim 17, wherein: the cooling system further comprises a battery cooling system, the battery cooling system comprises a heat management assembly, the heat management assembly comprises a heat exchanger and a second electronic expansion valve, the second electronic expansion valve is integrated with the heat exchanger, the second electronic expansion valve comprises a valve core assembly, a stator assembly, an electronic control part and a sensor, the valve core assembly comprises a valve core, a valve seat and a rotor assembly, the electronic control part comprises an electronic control board, the first electronic expansion valve comprises a first inlet, a second inlet, a first outlet 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 part of the valve seat is arranged in the first channel or a first cavity communicated with the first channel, and the valve core and the valve seat are matched to control the flow of a refrigerant of the first channel, the sensor comprises a main body part, an induction head and a pin, the induction head is arranged in the second channel or a second cavity communicated with the second channel, the pin is directly electrically connected with the electric control board, the heat exchanger comprises a third channel and a fourth channel which are isolated from each other, the first channel is communicated with the second channel through the third channel or the first channel is communicated with the third channel, and the second channel is communicated with the fourth channel.