Electronic expansion valve and manufacturing method thereof

Abstract

The present application relates to an electronic expansion valve. The electronic expansion valve comprises a valve body allowing refrigerant to pass through; a valve assembly for throttling the refrigerant; a main control board electrically connected with the valve assembly; a housing assembly comprising a main housing; the main housing has a main control cavity; the main control board is arranged in the main control cavity; the electronic expansion valve further comprises a refrigerant sensor, the refrigerant sensor comprises a sensor body and an electrical connector; the housing assembly has a partition wall and a sensor cavity, the sensor cavity is located on one side of the partition wall; at least a part of the sensor body is accommodated in the sensor cavity and abuts against the partition wall; the electrical connector is arranged to penetrate through the partition wall, wherein one end of the electrical connector is used to electrically connect with the sensor body in the sensor cavity. Since at least a part of the sensor body of the refrigerant sensor is accommodated in the sensor cavity and abuts against the partition wall, the stability of the sensor body installation is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to an electronic expansion valve and a manufacturing method of the electronic expansion valve. BACKGROUND

[0002] A conventional air conditioning system includes four major components, i.e. a compressor, an evaporator, a condenser and a throttling device. According to different requirements of the air conditioning system, the throttling device can include an expansion valve and a capillary tube. The expansion valve can be divided into a thermal expansion valve and an electronic expansion valve according to the driving principle. The electronic expansion valve can be divided into an electromagnetic driven electronic expansion valve and a motor driven electronic expansion valve according to the driving mode.

[0003] A vehicle air conditioning system includes the above-mentioned four major components, and the vehicle air conditioning system usually uses an expansion valve as the throttling device. Chinese patent application CN101551174A discloses a vehicle air conditioning system which uses a thermal expansion valve as the throttling device. In other prior art, an electronic expansion valve is also used as the throttling device in the vehicle air conditioning system.

[0004] With the development of the automobile industry towards electrification, the automobile using a power battery as the driving source is also becoming more and more popular. The power battery will generate heat during the charging and discharging process, resulting in the temperature rise of the battery. According to the technical solution disclosed in Chinese patent application CN101551174A, the stability of the battery temperature can be maintained by setting a refrigerant branch for battery cooling in the vehicle air conditioning system. An electronic expansion valve can be arranged on the refrigerant branch to achieve the throttling process of the refrigerant.

[0005] The electronic expansion valve in the prior art includes a valve body, a valve assembly, a sensor and an electric control board. The electronic expansion valve in the prior art has the disadvantage that the positions of the components are not reasonable. SUMMARY

[0006] The present application aims to provide an electronic expansion valve which has the advantage that the refrigerant sensor is stably installed.

[0007] The present application also aims to provide a manufacturing method of the above-mentioned electronic expansion valve which has the advantage of easy installation.

[0008] To achieve the purpose of the electronic expansion valve, including: valve body, allow refrigerant to pass through; Valve assembly for throttling refrigerant; Main electric control board, electrically connected with the valve assembly; Shell assembly, including the main shell; Main shell has a main control cavity; Main electric control board is arranged in the main control cavity; Electronic expansion valve also includes a refrigerant sensor, refrigerant sensor includes a sensor body and an electrical connector; Shell assembly has a partition wall and a sensor cavity, the sensor cavity is located on one side of the partition wall; At least a part of the sensor body is accommodated in the sensor cavity, and abuts against the partition wall; The electrical connector is arranged to penetrate the partition wall, wherein one end of the electrical connector is used to electrically connect with the sensor body in the sensor cavity.

[0009] The positive progress effect of the present application is that: since at least a part of the sensor body of the refrigerant sensor is accommodated in the sensor cavity, and abuts against the partition wall, the stability of the sensor body installation is enhanced. The heat management assembly provided by the present application comprises the electronic expansion valve. The automobile air conditioning system provided by the present application comprises the heat management assembly. BRIEF DESCRIPTION OF DRAWINGS

[0010] The above-mentioned and other features, properties and advantages of the present application will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0011] Figure 1 A schematic view of an automobile air conditioning system;

[0012] Figures 2A-2D A schematic view of an electronic expansion valve in the first embodiment of the present application;

[0013] Figure 3 An exploded view of the electronic expansion valve in the first embodiment of the present application;

[0014] Figure 4 A Figure 2C A sectional view in A-A direction, wherein the dotted arrow shows the flow path of the refrigerant;

[0015] Figure 5 A Figure 2D A sectional view in B-B direction;

[0016] Figure 6 A Figure 2C A sectional view in C-C direction;

[0017] Figure 7 A Figure 2D A sectional view in D-D direction;

[0018] Figures 8A-8B A schematic view of the main shell in the first embodiment of the present application;

[0019] Figures 9A-9Cis a sectional view of the valve body in the direction of E-E;

[0020] Figure 9D is a sectional view of the valve body in the direction of E-E;

[0021] Figures 10A-10D is a schematic view of an electronic expansion valve in a second embodiment of the present application;

[0022] Figure 11 is an exploded view of the electronic expansion valve in the second embodiment of the present application;

[0023] Figure 12 is a schematic view of Figure 10C is a sectional view in the direction of E-E;

[0024] Figure 13 is a schematic view of Figure 10D is a sectional view in the direction of F-F;

[0025] Figures 14A-14B is a schematic view of a main housing in a second embodiment of the present application;

[0026] Figures 15A-15B is a schematic view of a sub-housing in the second embodiment of the present application;

[0027] Figures 16A-16D is a schematic view of an electronic expansion valve in a third embodiment of the present application;

[0028] Figure 17 is an exploded view of the electronic expansion valve in the third embodiment of the present application;

[0029] Figure 18 is a schematic view of Figure 16C is a sectional view in the direction of G-G;

[0030] Figure 19 is a schematic view of Figure 16D is a sectional view in the direction of J-J;

[0031] Figure 20 is a schematic view of Figure 16C is a sectional view in the direction of H-H;

[0032] Figures 21A-21B is a schematic view of a main housing in a third embodiment of the present application;

[0033] Figures 22A-22B is a schematic view of a sub-housing in the third embodiment of the present application;

[0034] Fig. 23 is a sectional view of the electronic expansion valve showing the connection relationship of the main housing, the sensor and the valve body, in which the opening of the main housing faces away from the valve body;

[0035] Fig. 24 is a cross-sectional view of the electronic expansion valve showing the connection of the main housing, sensor, and valve body, with the opening of the main housing facing the valve body;

[0036] Fig. 25 is a cross-sectional view of the sensor;

[0037] Figures 26A-26D Fig. 26 is a schematic view of the electronic expansion valve of the fourth embodiment of the present application, wherein the main cap and the sub-cap are hidden in Figure 26C and Figure 26D ;

[0038] Figures 27A-27B Fig. 27 is a schematic view of the main housing;

[0039] Figure 28A Fig. 28 is a schematic view of the connection of the main housing and the sub-housing;

[0040] Figure 28B Fig. 29 is a schematic view of the sub-housing;

[0041] Figure 29 Fig. 30 is a cross-sectional view of the K-K direction in Figure 26B ;

[0042] Figure 30 Fig. 31 is a cross-sectional view of the M-M direction in Figure 26B ;

[0043] Figure 31 Fig. 32 is a cross-sectional view of the electronic expansion valve along the axial direction of the valve assembly;

[0044] Figure 32 Fig. 33 is a cross-sectional view of the electronic expansion valve along the radial direction of the valve assembly;

[0045] Figure 33 Fig. 34 is a cross-sectional view of the electronic expansion valve showing the conductive fastener fixing the main electronic control board and the circuit board positioning member to the housing assembly;

[0046] Figure 34 Fig. 35 is a cross-sectional view of the electronic expansion valve showing the circuit board positioning member;

[0047] Figure 35 Fig. 36 is a schematic view of the connection of the circuit board positioning member and the grounding member;

[0048] Figure 36 Fig. 37 is a cross-sectional view of the electronic expansion valve showing the sensor connecting member located outside the sensor cavity;

[0049] Figure 37 Fig. 38 is a schematic view of the electronic expansion valve, with the valve body hidden;

[0050] Figure 38 Fig. 39 is a cross-sectional view of the electronic expansion valve, with the valve body hidden and showing the first direction and the second direction;

[0051] Figure 39 Fig. 6 is a schematic view of the refrigerant sensor assembly with the sub-housing;

[0052] Figure 40 Fig. 7 is a cross-sectional view of the electronic expansion valve showing the electrical connection embedded in the partition wall;

[0053] Figure 41 Fig. 8 is a schematic view of the sub-housing. DETAILED DESCRIPTION

[0054] The subject technology is disclosed below with respect to a number of different embodiments or examples of the subject technology. In order to simplify the disclosure, specific examples of elements and arrangements are described below to provide a concrete basis for the patenting of this technology. These are, of course, merely examples and are not intended to be limiting. For example, the first feature recited in the specification after the first claim can include embodiments in which the first and second features are disposed in direct contact with each other, and can also include embodiments in which additional features are disposed between the first and second features such that the first and second features are not in direct contact with each other. Additionally, like reference numerals and / or letters can be used throughout the specification and / or claims to refer to like elements and / or features. Such repetitions of like reference numerals and / or letters have been utilized in this disclosure not only for the sake of brevity, but typically to avoid obscuring the novel and non- obvious aspects of the subject technology. Further, when a first element is described as being "connected" or "coupled" to a second element, this description includes direct connections or couplings between the first and second elements and also indirect connections or couplings between the first and second elements where one or more additional elements are disposed between the first and second elements.

[0055] It is noted that, Figure 1 It is noted that the figures herewith shown are not drawn to scale and that actual dimensions can be obtained from the claims.

[0056] Figure 1 An automotive air conditioning system 900 is shown in one embodiment of the present application. The automotive air conditioning system 900 includes a compressor 90, a condenser 91, electronic expansion valves 92, 94, an evaporator 93, a heat exchanger 95, a pump 96, a battery module 97, refrigerant flow lines, and coolant flow lines. The lines interconnect the various components of the automotive air conditioning system 900.

[0057] The evaporator 93 and the electronic expansion valve 92 form a thermal management assembly. The electronic expansion valve 92 is mounted on the evaporator 93 and is integral with the evaporator 93. The evaporator 93 has an evaporator passage 93a in which refrigerant flows. The evaporator passage 93a is in communication with the electronic expansion valve 92.

[0058] The heat exchanger 95 and the electronic expansion valve 94 form a heat management assembly. The electronic expansion valve 94 is mounted on the heat exchanger 95 and integrated with the heat exchanger 95. The heat exchanger 95 has a first heat exchange passage 95a and a second heat exchange passage 95b. The first heat exchange passage 95a and the second heat exchange passage 95b are not in communication with each other. The first heat exchange passage 95a flows with refrigerant, and the second heat exchange passage 95b flows with coolant. The first heat exchange passage 95a is in communication with the electronic expansion valve 94, and the second heat exchange passage 95b is in communication with a loop in which the pump 96 and the battery module 97 are arranged.

[0059] In the working process of the automobile air conditioning system 900, the heat generated by the battery module 97 is taken away by the coolant and enters the second heat exchange passage 95b of the heat exchanger 95 along with the coolant. The refrigerant flows out of the electronic expansion valve 94 after being throttled by the electronic expansion valve 94 and enters the first heat exchange passage 95a at a low temperature and low pressure. In the heat exchanger 95, the heat in the coolant in the second heat exchange passage 95b is absorbed by the refrigerant in the first heat exchange passage 95a, so that the automobile air conditioning system 900 can realize the cooling process of the battery module 97.

[0060] The refrigerant flows out of the electronic expansion valve 92 after being throttled by the electronic expansion valve 92 and enters the evaporator passage 93a at a low temperature and low pressure. The evaporator 93 allows an air flow to blow from the outside of the evaporator passage 93a to absorb heat in the air flow, thereby cooling the air flow. The cooled air flow can be sent into the vehicle cabin to adjust the hot and humid environment in the cabin.

[0061] Figures 2A-2D and Figure 3 , 4 , 5, 6, 7, 8A, 8B show the first embodiment of the electronic expansion valve 92, 94 in the present application. In this embodiment, the electronic expansion valve 92, 94 includes a valve body 1, a valve assembly 2, a refrigerant sensor 31, a main electronic control board 4 and a housing assembly 5.

[0062] Reference Figures 2A-2D , Figure 4 and Figures 9A-9DThe valve body 1 is block-shaped and has three sets of opposing sides in space. Internally, the valve body 1 has a first refrigerant inlet 1a and a first refrigerant outlet 1b, wherein a first refrigerant channel 11 is formed between the first refrigerant inlet 1a and the first refrigerant outlet 1b, penetrating the valve body 1. The first refrigerant inlet 1a and the first refrigerant outlet 1b are preferably located on opposing sides of the valve body 1. In embodiments not shown, the first refrigerant inlet 1a and the first refrigerant outlet 1b may also be located on the same side of the valve body 1, or they may be located on adjacent sides of the valve body 1. The first refrigerant outlet 1b communicates with the inlet of the evaporator channel 93a or the inlet of the first heat exchange channel 95a.

[0063] To enable the valve assembly 2 to throttle the refrigerant in the first refrigerant passage 11, the valve body 1 preferably has a first mounting cavity 15 on the side without the first refrigerant inlet 1a and the first refrigerant outlet 1b. The first mounting cavity 15 extends from the outer surface of the valve body 1 towards the interior of the valve body 1 and communicates with the first refrigerant passage 11. The valve assembly 2 is inserted into the first mounting cavity 15, and at least a portion of the valve assembly 2 is located in the first refrigerant passage 11 to throttle the refrigerant in the first refrigerant passage 11.

[0064] like Figure 3 , 4 As shown in Figure 5, valve assembly 2 includes a coil assembly 21 and a valve core assembly 22. One end of the valve core assembly 22 is inserted into the first mounting cavity 15 of the valve body 1 and extends into the first refrigerant passage 11. The portion of the valve core assembly 22 inserted into the valve body 1 is fixed to the valve body 1. The other end of the valve core assembly 22 protrudes from the outside of the valve body 1. The coil assembly 21 is disposed on the outside of the valve body 1 and is sleeved on the valve core assembly 22. The coil assembly 21 is electrically connected to the main control board 4. When energized, the coil assembly 21 can drive the valve core assembly 22 to move, so that the valve core assembly 22 can perform a throttling process on the refrigerant in the first refrigerant passage 11. In embodiments not shown, valve assembly 2 can also be an electromagnetically driven valve assembly.

[0065] Valve core assembly 22 includes components along the axis of valve assembly 2 (e.g., Figure 3The valve seat 221, the valve core 222, the connecting seat 224, the rotor assembly 223 and the cover 225 are assembled together (as shown by the dotted line in FIG. 2). The valve seat 221 has a valve hole 221a, and the portion of the valve seat 221 having the valve hole 221a is arranged inside the valve body 1 and located in the first refrigerant passage 11. The valve seat 221 is fixed on the valve body 1, and the connecting seat 224 can be welded with the valve body 1 and the valve seat 221 respectively. The rotor assembly 223 and the cover 225 are connected with the connecting seat 224 respectively. The rotor assembly 223 includes a permanent magnet, which can rotate around the axis of the valve assembly 2 under the action of the excitation magnetic field generated by the energized coil assembly 21. The rotor assembly 223 further includes a transmission assembly for converting the rotation of the permanent magnet into movement along the axis of the valve assembly 2.

[0066] The valve core 222 is slidably assembled in the valve seat 221. The permanent magnet of the rotor assembly 223 is driven by the energized coil assembly 21, and drives the valve core 222 to move relative to the valve seat 221 along the axis of the valve assembly 2 through the transmission assembly, so as to adjust the opening degree of the valve hole 221a. When the refrigerant in the first refrigerant passage 11 passes through the valve hole 221a with a small opening degree, the refrigerant is throttled.

[0067] In order to improve the integration of the thermal management assembly, the valve body 1 further has a second refrigerant inlet 1c and a second refrigerant outlet 1d, and a second refrigerant passage 12 is formed through the valve body 1 between the second refrigerant inlet 1c and the second refrigerant outlet 1d, which is not communicated with the first refrigerant passage 11. Such a design can make the valve body 1 form part of the refrigerant outlet flow path of the evaporator 93 or the heat exchanger 95. In this embodiment, the second refrigerant inlet 1c is communicated with the outlet of the evaporator passage 93a or the outlet of the second heat exchange passage 95b.

[0068] The second refrigerant inlet 1c and the second refrigerant outlet 1d are preferably arranged on opposite sides of the valve body 1. In a more specific embodiment, the first refrigerant inlet 1a and the second refrigerant outlet 1d are preferably arranged on the same side of the valve body 1, and the first refrigerant outlet 1b and the second refrigerant inlet 1c are preferably arranged on the same side of the valve body 1. In an embodiment not shown, the second refrigerant inlet 1c and the second refrigerant outlet 1d can also be arranged on the same side of the valve body 1, or the second refrigerant inlet 1c and the second refrigerant outlet 1d can also be arranged on adjacent sides of the valve body 1.

[0069] To enable the refrigerant sensor 31 to detect the refrigerant in the second refrigerant passage 12, the valve body 1 preferably has a second installation cavity 16 opened on the side without the second refrigerant inlet 1c and the second refrigerant outlet 1d. The second installation cavity 16 extends from the outer surface of the valve body 1 to the interior of the valve body 1 and communicates with the second refrigerant passage 12. The refrigerant sensor 31 is inserted into the second installation cavity 16, and at least a portion of the refrigerant sensor 31 is located in the second refrigerant passage 12 to detect the refrigerant in the second refrigerant passage 12.

[0070] The refrigerant sensor 31 is preferably a temperature and pressure sensor that integrates temperature detection function and pressure detection function. In structure, the refrigerant sensor 31 has a temperature detection portion 31a and a pressure detection portion 31b arranged side by side. As shown in Figure 4 , 25, the temperature detection portion 31a and the pressure detection portion 31b are arranged in front of and behind each other in the flow direction of the refrigerant, and the temperature detection portion 31a is preferably arranged upstream of the pressure detection portion 31b. The temperature detection portion 31a and the pressure detection portion 31b are preferably arranged in alignment with the center line of the second refrigerant passage 12. Such design helps to reduce the length of the refrigerant sensor 31 in the direction of insertion into the valve body 1.

[0071] As shown in Figure 3 , 5 , in terms of arrangement orientation, the refrigerant sensor 31 can be arranged with the valve assembly 2 on different sides of the valve body 1, for example, on two adjacent sides of the valve body 1. Correspondingly, the first installation cavity 15 and the second installation cavity 16 are opened on different sides of the valve body 1. In an embodiment not shown, the refrigerant sensor 31 can also be arranged with the valve assembly 2 on the same side of the valve body 1, and correspondingly, the first installation cavity 15 and the second installation cavity 16 are opened on the same side of the valve body 1.

[0072] Continuing to refer to Figure 3 and Figure 5 , the main control board 4 is electrically connected with the valve assembly 2 and the refrigerant sensor 31, respectively. The refrigerant sensor 31 detects the refrigerant in the second refrigerant passage 12 to generate detection signals, such as temperature signals and pressure signals; and the main control board 4 is capable of receiving the detection signals. The main control board 4 is also configured to send driving signals to the valve assembly 2 to drive the valve assembly 2 to move, thereby realizing the throttling process of the refrigerant in the first refrigerant passage 11. More specifically, the main control board 4 also has a microprocessor that is capable of processing the detection signals generated by the refrigerant sensor 31 and generating the above-mentioned driving signals.

[0073] The electrical connection can be achieved by a pin or a soft conductive member, such as a flexible flat cable. The electrical connection includes detachable electrical connection. As Figure 3 and Figure 5As shown, the electronic expansion valves 92, 94 comprise a flexible conductor 41; the flexible conductor 41 is detachably electrically connected to the refrigerant sensor 31 and the main control board 4. For example, one end of the flexible conductor 41 is arranged to be snap-connected and electrically connected to the main control board 4, and the other end is welded to the refrigerant sensor 31. In Figure 3 and Figure 5 In the embodiment shown, the valve assembly 2 is electrically connected to the main control board 4 through a pin.

[0074] As shown in Figure 3 , 5 In terms of arrangement, the main control board 4 can be arranged on the same side of the valve body 1 as the refrigerant sensor 31. In Figure 5 , the main control board 4 and the refrigerant sensor 31 are arranged side by side and are detachably electrically connected through the flexible conductor 41. The side-by-side arrangement of the main control board 4 and the refrigerant sensor 31 helps to make the structure of the electronic expansion valves 92, 94 more compact.

[0075] In an embodiment not shown, the main control board 4 can also be arranged on a different side of the valve body 1 from the refrigerant sensor 31, for example, the main control board 4 and the refrigerant sensor 31 are arranged on adjacent sides of the valve body 1, respectively.

[0076] With reference to 2A, Figure 2B , Figure 3 , Figure 5 and Figure 6 The main control board 4 is accommodated in the housing assembly 5, and the refrigerant sensor 31 is connected to the housing assembly 5, more specifically, the refrigerant sensor 31 is pressed against the housing assembly 5. Such a design helps to improve the stability of the refrigerant sensor 31 installation and makes the structure of the electronic expansion valves 92, 94 compact.

[0077] With reference to Figure 5 , the housing assembly 5 comprises a main housing 51; the main housing 51 has a main control cavity 51a; the main control board 4 is arranged in the main control cavity 51a. The valve assembly 2 and the main control board 4 are respectively located on different sides of the valve body 1. Such a design enables the main control cavity 51a on the side of the valve body 1 where the main control board 4 is arranged to have a larger extension space, so that the main control cavity 51a can accommodate a larger size main control board 4; the larger size main control board 4 can integrate more electronic devices, which is very advantageous for realizing intelligent control of the electronic expansion valve.

[0078] With reference to Figure 5 , more specifically, the valve assembly 2 and the main control board 4 are respectively located on adjacent sides of the valve body 1. This helps to improve the compactness of the electronic expansion valves 92, 94. Preferably, the valve assembly 2 and the main control board 4 are respectively located on adjacent sides of the valve body 1 where no refrigerant inlet and outlet are provided.

[0079] In an embodiment not shown, the valve assembly 2, the main control board 4 and the refrigerant sensor 31 can be located at three different sides of the valve body 1 respectively, which are not provided with the refrigerant inlet and outlet.

[0080] The electronic expansion valve 92, 94 has an installation position, which can be the orientation of the electronic expansion valve 92, 94 after it is installed on the automobile. The installation position is also the position of the electronic expansion valve 92, 94 when it is in working state. In order to avoid the refrigerant and the lubricating oil and impurities contained therein from accumulating in the valve assembly 2, for the electronic expansion valve 92, 94 in the installation position, the valve assembly 2 is located at the upper side of the valve body 1 in the vertical direction. Such design makes the refrigerant entering the cover body 225 of the valve assembly 2 during the working process of the electronic expansion valve 92, 94 able to flow out of the cover body 225 under the action of gravity after the electronic expansion valve 92, 94 stops working, thereby avoiding the refrigerant from being stored in the valve assembly 2. In the installation position, the angle between the axis of the valve assembly 2 and the vertical direction should be less than 90°, preferably less than or equal to 75°.

[0081] With reference to Figure 3 , 4 , 5, 7, the electronic expansion valve 92, 94 further comprises a valve assembly sensor 32, 33; the valve assembly sensor 32, 33 is electrically connected with the main control board 4; the valve assembly sensor 32, 33 is used for detecting the valve assembly 2. The valve assembly sensor 32, 33 is arranged in the main control cavity 51a. As long as the sensor can detect each part of the valve assembly and generate a feedback signal, it belongs to the scope of the valve assembly sensor 32, 33. For example, the valve assembly sensor 32, 33 can be a Hall sensor for detecting the magnetic field change of the permanent magnet of the rotor assembly 223, or a position sensor for detecting the movement of the valve core 222 along the axis of the valve assembly 2. The valve assembly sensor 32, 33 can detect abnormal working states of the valve assembly 2, such as loss of step and locked rotor.

[0082] The Hall sensor can sense the magnetic field change of the permanent magnet of the rotor assembly 223 and generate a feedback signal. The feedback signal is transmitted to the microprocessor of the main control board 4.

[0083] As shown in Figure 6 , 7 , the refrigerant sensor 31, the main housing 51 and the valve body 1 are arranged in layers and connected into one body in the direction of the layers; wherein one of the main housing 51 and the refrigerant sensor 31 is clamped between the valve body 1 and the other one of the main housing 51 and the refrigerant sensor 31. Such design helps to reduce the assembly steps of the electronic expansion valve 92, 94 and makes the structure of the electronic expansion valve 92, 94 compact.

[0084] With reference to Figure 6The refrigerant sensor 31, the main housing 51 and the valve body 1 are connected into one body by the sensor connecting member 71. The sensor connecting member 71 can be a screw. The sensor connecting member 71 penetrates at least one of the main housing 51 and the refrigerant sensor 31, and is fixedly connected with the valve body 1.

[0085] In the embodiment shown in the drawings, the main housing 51 is clamped between the refrigerant sensor 31 and the valve body 1, and the sensor connecting member 71 penetrates the refrigerant sensor 31 and the main housing 51. Figure 6

[0086] In the embodiment not shown in the drawings, the part of the refrigerant sensor 31 located inside the valve body 1 is threadedly connected with the valve body 1, and the part of the refrigerant sensor 31 located outside the valve body 1 presses the main housing 51 against the valve body 1.

[0087] With reference to Figure 3 , 4 , 5, 8A, 8B, the housing assembly 5 further comprises a main cover 52; the main housing 51 has a main opening 51b, which is in communication with the main control cavity 51a; the main opening 51b can be directed away from the valve body 1, and allows the main electric control board 4 to enter the main control cavity 51a; the main cover 52 is used to cover the main housing 51 to close the main opening 51b.

[0088] With reference to Figure 3 , 4 , 5, 8A, 8B, the main seal 81 is arranged along the circumference of the main opening 51b, and is clamped between the main cover 52 and the main housing 51 to seal the main opening 51b. One of the main housing 51 and the main cover 52 can be provided with a recess for accommodating the main seal 81.

[0089] With reference to Figure 3 , 4 , 5, 8A, 8B, the main housing 51 has a sensor hole 51c, which is in communication with the main control cavity 51a; the refrigerant sensor 31 penetrates the sensor hole 51c; wherein the part of the refrigerant sensor 31 located inside the main control cavity 51a is electrically connected with the main electric control board 4; the other part of the refrigerant sensor 31 located outside the main control cavity 51a is used to detect the refrigerant in the second refrigerant passage 12. The part of the refrigerant sensor 31 located inside the main control cavity 51a is pressed against the main housing 51.

[0090] As shown in Figure 3 , 6 , the electronic expansion valve 92, 94 further comprises a sensor seal 82, which is arranged along the circumference of the sensor hole 51c; the sensor seal 82 is clamped between the refrigerant sensor 31 and the main housing 51 to seal the sensor hole 51c. ​

[0091] To fix the valve assembly 2, as shown in Figure 3 , 4 , the electronic expansion valve 92, 94 further comprises a valve assembly connector 72; the valve assembly connector 72 is arranged to be inserted into the valve body 1 from the side of the valve body 1 where the valve assembly 2 is not arranged, and is in position cooperation with the part of the valve assembly 2 located in the valve body 1, so as to fix the valve assembly 2 on the valve body 1. Such design makes the valve assembly 2 easy to assemble on the valve body 1, and the valve assembly connector 72 does not interfere with the valve assembly 2 during the process of being inserted into the valve body 1.

[0092] More specifically, the valve assembly connector 72 is arranged to be inserted into the valve body 1 from the side of the valve body 1 where the main control panel 4 is arranged. The valve assembly connector 72 can be a latch.

[0093] As shown in Figure 4 , 5 , 7, 8A, 8B, the main housing 51 has a driving cavity 51d and a valve assembly hole 51e, the valve assembly hole 51e communicates with the driving cavity 51d; the valve assembly 2 penetrates through the valve assembly hole 51e; wherein, a part of the valve assembly 2 is located in the driving cavity 51d and is electrically connected with the main control panel 4; another part of the valve assembly 2 is located outside the main control cavity 51a and is used to throttle the refrigerant in the first refrigerant passage 11.

[0094] Continuing to refer to Figure 4 , 5 , the coil assembly 21 is fixed in the driving cavity 51d as an insert by the injection molding process. The valve core assembly 22 is inserted into the driving cavity 51d through the valve assembly hole 51e and is inserted in the middle of the coil assembly 21. The coil assembly 21 is electrically connected with the main control panel 4 in the main control cavity 51a through a pin, wherein the pin penetrates the partition wall between the driving cavity 51d and the main control cavity 51a as an insert in the injection molding process. The valve seat 221 and the valve core 222 are arranged outside the driving cavity 51d.

[0095] As shown in Figure 3 , 4 , 5, the valve assembly seal 83 is arranged along the circumference of the valve assembly hole 51e; the valve assembly seal 83 is clamped between the valve assembly 2 and the main housing 51 to seal the valve assembly hole 51e. The valve assembly seal 83 is pressed by the main housing 51 on the cover body 225 of the valve assembly 2 along the radial direction of the valve assembly 2. More specifically, the valve assembly seal 83 is pressed at the joint between the cover body 225 and the connecting seat 224.

[0096] As shown in Figure 7As shown, the main control cavity 51a has a first cavity portion 51a-1, a second cavity portion 51a-2 and a corner cavity portion 51a-3; the first cavity portion 51a-1 and the second cavity portion 51a-2 are respectively located at different sides of the valve body 1; the corner cavity portion 51a-3 extends from the side of the valve body 1 provided with the first cavity portion 51a-1, passes around a corner of the valve body 1 and reaches the side of the valve body 1 provided with the second cavity portion 51a-2; wherein a part of the main electric control board 4 is located in the first cavity portion 51a-1 and another part is located in the corner cavity portion 51a-3. This design increases the volume of the main control cavity 51a, so that the main electric control board 4 has a larger extension space. One corner of the valve body 1 refers to the intersection of the outer surfaces of two adjacent sides of the valve body 1.

[0097] In addition, the valve assembly 2 is electrically connected with the part of the main electric control board 4 located in the corner cavity portion 51a-3. This design makes the length of the pin required to achieve the electrical connection shorter.

[0098] The second cavity portion 51a-2 is located at the side of the valve body 1 provided with the valve assembly 2; the valve assembly sensors 32, 33 are arranged in the second cavity portion 51a-2. The valve assembly sensors 32, 33 are electrically connected with the part of the main electric control board 4 located in the corner cavity portion 51a-3. More specifically, referring to Figure 7 , the valve assembly sensors 32, 33 are mounted on and electrically connected with the connection circuit boards 401, 402, the connection circuit boards 401, 402 are arranged in the main control cavity 51a and fixedly connected to the main housing 51, and the connection circuit boards 401, 402 are electrically connected with the main electric control board 4 through the pins.

[0099] As shown in Figure 5 , the main housing 51 extends from one side of the valve body 1, passes around a corner of the valve body 1 and reaches the other side of the valve body 1. More specifically, the main housing 51 extends from the side of the valve body 1 provided with the main electric control board 4, passes around a corner of the valve body 1 and reaches the side of the valve body 1 provided with the valve assembly 2. This scheme improves the integrity of the main housing 51 and is conducive to the assembly and manufacture of the electronic expansion valves 92, 94.

[0100] As shown in Figure 3 , 5 , the electronic expansion valves 92, 94 further comprise a housing connecting piece 73; the housing connecting piece 73 connects the main housing 51 and the valve body 1; wherein one end of the housing connecting piece 73 is connected to the main housing 51 at the side of the valve body 1 provided with the valve assembly 2, and the other end of the housing connecting piece 73 is connected to the valve body 1 at the opposite side of the valve body 1 provided with the main electric control board 4. The arrangement of the housing connecting piece 73 improves the stability of the connection of the main housing 51 to the valve body 1.

[0101] As shown in Figure 3As shown in Figs. 8, 8, 9A to 9D, the side of the valve body 1, on which the refrigerant sensor 31 is arranged, has a first flat portion 13 and a first protruding portion 14; the first protruding portion 14 protrudes from the first flat portion 13 in a direction opposite to the direction in which the sensor 31 is inserted into the valve body 1; the sensor 31 is arranged to be inserted into the first protruding portion 14. The second mounting cavity 16 is formed in the first protruding portion 14. This design makes the first protruding portion 14 have sufficient thickness to cooperate with the connector for fixing the refrigerant sensor 31. The first protruding portion 14 has a connecting hole 14a for connecting the refrigerant sensor 31, which is used to be inserted into the connector for fixing the refrigerant sensor 31.

[0102] The side of the main housing 51, which is close to the valve body 1, has a second flat portion 511 and a second protruding portion 512; the second protruding portion 512 protrudes from the second flat portion 511 in a direction consistent with the direction in which the sensor 31 is inserted into the valve body 1; the second flat portion 511 is arranged opposite to the first protruding portion 14; the second protruding portion 512 is arranged opposite to the first flat portion 13. This design helps to increase the volume of the main control cavity 51a.

[0103] As shown in Figs. 10, 10, 11A to 11D, the main control cavity 51a has a first control cavity 511a and a second control cavity 512a. The first control cavity 511a is arranged in the first flat portion 13 of the valve body 1; the second control cavity 512a is arranged in the second flat portion 511 of the main housing 51. Figure 5 And Figure 8B As shown in Figs. 12, 12, 13A to 13D, the main electric control board 4 can be fixed on the main housing 51. For example, the four corners of the main electric control board 4 can be fixed to the main housing 51 by screws. This design helps to increase the stability of the installation of the main electric control board 4 in the main control cavity 51a. Figure 8B As shown in Fig. 14, the main housing 51 has a column hole 513 for fixing the main electric control board 4.

[0104] As shown in Figs. 15, 15, 16A to 16D, the electronic expansion valve 92, 94 further comprises a first valve body seal 801, a second valve body seal 802 and a third valve body seal 803. Figure 3 、 4 As shown in Figs. 17, 17, 18A to 18D, the first valve body seal 801 is arranged in the second mounting cavity 16 of the valve body 1 and surrounds the refrigerant sensor 31; the first valve body seal 801 is compressed by the valve body 1 and the refrigerant sensor 31.

[0105] The second valve body seal 802 and the third valve body seal 803 are respectively arranged in the first mounting cavity 15 and surround the valve assembly 2; the second valve body seal 802 and the third valve body seal 803 are respectively compressed by the valve body 1 and the valve assembly 2.

[0106] The second valve body seal 802 and the third valve body seal 803 are respectively arranged in the first mounting cavity 15 and surround the valve assembly 2; the second valve body seal 802 and the third valve body seal 803 are respectively compressed by the valve body 1 and the valve assembly 2.

[0107] More specifically, the second valve body seal 802 and the third valve body seal 803 are arranged around the valve seat 221 of the valve assembly 2, respectively. The valve hole 221a of the valve seat 221 is located between the second valve body seal 802 and the third valve body seal 803 in the axial direction of the valve assembly 2. This ensures that the refrigerant in the first refrigerant passage 11 can pass through the valve hole 221a completely.

[0108] Figures 10A-10D and Figure 11 , 12 , 13, 14A, 14B, 15A, 15B show a second embodiment of the electronic expansion valve 92, 94 in the present application. The same parts of the second embodiment as the first embodiment are marked with the same reference numerals, and the parts of the second embodiment that are the same as the first embodiment will not be described again.

[0109] With reference to Figures 10A-10D and Figure 11 , 12 , 13, 15A, 15B, the housing assembly 5 further comprises a sub-housing 53; the sub-housing 53 has a driving cavity 53a and a valve assembly hole 53b; the valve assembly hole 53b communicates with the driving cavity 53a; the valve assembly 2 penetrates through the valve assembly hole 53b; wherein a part of the valve assembly 2 is located in the driving cavity 53a and is electrically connected with the main control board 4; another part of the valve assembly 2 is located outside the driving cavity 53a and is used to throttle the refrigerant in the first refrigerant passage 11; the sub-housing 53 is detachably connected with the main housing 51. This scheme makes the electronic expansion valve 92, 94 have a higher degree of modularity, so that the electronic expansion valve 92, 94 is easy to disassemble.

[0110] With reference to Figure 12 , 13 , the coil assembly 21 is fixed in the driving cavity 53a as an insert by the injection molding process. The valve core assembly 22 is inserted into the driving cavity 53a through the valve assembly hole 53b and is inserted between the coil assembly 21. The coil assembly 21 is electrically connected with the main control board 4 in the main control cavity 51a through the soft conductive piece 42. The valve seat 221 and the valve core 222 are arranged outside the driving cavity 53a.

[0111] As shown in Figure 11 , 12 , 13, the valve assembly seal 84 is arranged along the circumference of the valve assembly hole 53b; the valve assembly seal 84 is clamped between the valve assembly 2 and the sub-housing 53 to seal the valve assembly hole 53b. The valve assembly seal 84 is pressed on the cover body 225 of the valve assembly 2 by the sub-housing 53 in the radial direction of the valve assembly 2. More specifically, the valve assembly seal 84 is pressed at the joint between the cover body 225 and the connecting seat 224.

[0112] As shown in Figure 11 , 12The auxiliary housing 53 further has an auxiliary control cavity 53c and an auxiliary connecting opening 53d, as shown in Figs. 13, 14A, 14B, 15A and 15B. The auxiliary connecting opening 53d is in communication with the auxiliary control cavity 53c. The main housing 51 has a main connecting opening 51f. The main connecting opening 51f is in communication with the main control cavity 51a. The auxiliary connecting opening 53d is arranged to be in communication with the main connecting opening 51f, so that the auxiliary control cavity 53c is in communication with the main control cavity 51a. The soft conductive member 42 penetrates the main connecting opening 51f and the auxiliary connecting opening 53d, so as to detachably electrically connect the main electric control board 4 and the valve assembly 2. The soft conductive member 42 can be a flexible flat cable. One end of the soft conductive member 42 is arranged to be snap-connected and electrically connected with the main electric control board 4, and the other end is welded with the valve assembly 2.

[0113] With reference to Figs. 13, 14A, 14B, 15A and 15B, Figure 12 , 13 , 15A, the auxiliary control cavity 53c and the main control cavity 51a are respectively located at different sides of the valve body 1, for example, adjacent sides. The main control cavity 51a is located at the side of the valve body 1 where the main electric control board 4 is arranged. The auxiliary control cavity 53c is located at the side of the valve body 1 where the valve assembly 2 is arranged.

[0114] The housing assembly 5 further comprises an auxiliary cover 54. The auxiliary housing 53 has an auxiliary opening 53e in communication with the auxiliary control cavity 53c. The auxiliary cover 54 is used to cover the auxiliary housing 53 to seal the auxiliary opening 53e. The auxiliary cover 54 can be welded with the auxiliary housing 53.

[0115] The electronic expansion valve 92, 94 further comprises a connecting seal 85. The connecting seal 85 is arranged along the circumferences of the auxiliary connecting opening 53d and the main connecting opening 51f. The connecting seal 85 is clamped between the main housing 51 and the auxiliary housing 53 to seal the auxiliary connecting opening 53d and the main connecting opening 51f.

[0116] The valve assembly sensors 32, 33 are arranged in the auxiliary control cavity 53c. The soft conductive member 43 penetrates the main connecting opening 51f and the auxiliary connecting opening 53d, so as to detachably electrically connect the main electric control board 4 and the valve assembly sensors 32, 33. More specifically, with reference to Figs. 13, 14A, 14B, 15A and 15B, Figure 13 The valve assembly sensors 32, 33 are mounted on and electrically connected with a connecting circuit board 404, 405 arranged in the auxiliary control cavity 53c and fixedly connected with the main housing 51. The connecting circuit board 404, 405 is electrically connected with the main electric control board 4 through the soft conductive member 43.

[0117] The soft conductive member 43 can be a flexible flat cable. One end of the soft conductive member 43 is arranged to be snap-connected and electrically connected with the main electric control board 4, and the other end is welded with the connecting circuit board 404, 405.

[0118] As shown in Figs. 13, 14A, 14B, 15A and 15B, Figure 11 ,13 As shown, the electronic expansion valves 92 and 94 also include a housing connector 74; the housing connector 74 connects the sub-housing 53 and the valve body 1; wherein, one end of the housing connector 74 is connected to the sub-housing 53 on the side of the valve body 1 where the valve assembly 2 is located, and the other end of the housing connector 74 is connected to the valve body 1 on the opposite side where the main electronic control board 4 is located. This design provides stability for the connection of the sub-housing 53 to the valve body 1.

[0119] like Figure 11 As shown, the electronic expansion valves 92 and 94 also include a housing assembly connector 75; the secondary housing 53 and the main housing 51 are detachably connected via the housing assembly connector 75. The housing assembly connector 75 may be a screw.

[0120] like Figure 11 As shown, the main housing 51 has an interface section 510. The interface section 510 is electrically connected to the main control board 4 via a connecting circuit board 403. The interface section 510 is used for connection with the outside world.

[0121] Figures 16A-16D as well as Figure 17 , 18 Figures 19, 20, 21A, 21B, 22A, and 22B illustrate third embodiments of the electronic expansion valves 92 and 94 of the present invention. Components identical to those in the third embodiment and the first embodiment are referred to by the same reference numerals, and the parts of the third embodiment that are identical to those in the first embodiment will not be described again.

[0122] like Figures 16A-16D as well as Figure 17 , 22A As shown in Figure 22B, the housing assembly 5 also includes a secondary housing 55; the secondary housing 55 has a secondary control cavity 55a and a sensor hole 55b; the sensor hole 55b communicates with the secondary control cavity 55a; a refrigerant sensor 31 passes through the sensor hole 55b; wherein, a portion of the refrigerant sensor 31 is located inside the secondary control cavity 55a and is electrically connected to the main control board 4; another portion of the refrigerant sensor 31 is located outside the secondary control cavity 55a and is used to detect the refrigerant in the second refrigerant channel 12; the secondary housing 55 is detachably connected to the main housing 51. This design gives the electronic expansion valves 92 and 94 a high degree of modularity, making them easy to disassemble.

[0123] The portion of the refrigerant sensor 31 located within the secondary control chamber 55a is pressed against the secondary housing 55.

[0124] refer to Figure 17 , 1921A, 21B, 22A, 22B, the secondary housing 55 also has a secondary connection opening 55c; the secondary connection opening 55c communicates with the secondary control cavity 55a; the main housing 51 has a main connection opening 51g; the main connection opening 51g communicates with the main control cavity 51a; the secondary connection opening 55c is configured to communicate with the main connection opening 51g, thereby enabling the secondary control cavity 55a to communicate with the main control cavity 51a. A flexible conductive element 41 passes through the main connection opening 51g and the secondary connection opening 55c to detachably electrically connect the main control board 4 and the refrigerant sensor 31. The flexible conductive element 41 can be a flexible flat cable. One end of the flexible conductive element 41 is configured to snap-fit ​​and electrically connect with the main control board 4, and the other end is soldered to the refrigerant sensor 31.

[0125] Continue to refer to Figure 19 Both the secondary control chamber 55a and the main control chamber 51a are located on the side of the valve body 1 where the main electrical control board 4 is installed. The secondary control chamber 55a and the main control chamber 51a are arranged side by side.

[0126] like Figure 17 , 20 As shown, the housing assembly 5 also includes a secondary cover 56; the secondary housing 55 has a secondary opening 55d, which communicates with the secondary control chamber 55a; the secondary cover 56 is used to cover the secondary housing 55 to close the secondary opening 55d. In this embodiment, the secondary cover 56 can be welded to the secondary housing 55. The main cover 52 can be welded to the main housing 51. Both the secondary opening 55d and the main opening 51b are opened in a direction away from the valve body 1.

[0127] like Figure 17 , 19 As shown, the electronic expansion valves 92 and 94 also include a connecting seal 86; the connecting seal 86 is arranged circumferentially along the secondary connecting opening 55c and the main connecting opening 51g; the connecting seal 86 is clamped between the main housing 51 and the secondary housing 55 to seal the secondary connecting opening 55c and the main connecting opening 51g.

[0128] Continue to refer to Figure 19 The refrigerant sensor 31, the sub-housing 55, and the valve body 1 are stacked and connected as a single unit along the stacking direction; wherein, one of the sub-housing 55 and the refrigerant sensor 31 is clamped between the valve body 1 and the other of the sub-housing 55 and the refrigerant sensor 31. This design helps to reduce the assembly steps of the electronic expansion valves 92 and 94 and makes the structure of the electronic expansion valves 92 and 94 compact.

[0129] like Figure 17 , 20As shown, the electronic expansion valve 92, 94 further comprises a sensor connecting piece 76; the refrigerant sensor 31, the sub-housing 55 and the valve body 1 are connected into one body through the sensor connecting piece 76. The sensor connecting piece 76 can be a screw. The sensor connecting piece 76 penetrates at least one of the sub-housing 55 and the refrigerant sensor 31, and is fixedly connected with the valve body 1.

[0130] In Figure 20 In the embodiment shown, the sub-housing 55 is clamped between the refrigerant sensor 31 and the valve body 1, and the sensor connecting piece 76 penetrates the refrigerant sensor 31 and the sub-housing 55.

[0131] In an embodiment not shown, the part of the refrigerant sensor 31 located in the valve body 1 is threadedly connected with the valve body 1, and the part of the refrigerant sensor 31 located outside the valve body presses the sub-housing 55 against the valve body 1.

[0132] As Figure 17 , 20 As shown, the electronic expansion valve 92, 94 further comprises a sensor sealing piece 87; the sensor sealing piece 87 is arranged along the circumference of the sensor hole 55b; the sensor sealing piece 87 is clamped between the sub-housing 55 and the valve body 1 to seal the sensor hole 55b.

[0133] The electronic expansion valve 92, 94 further comprises a housing assembly connecting piece 77; the sub-housing 55 is detachably connected with the main housing 51 through the housing assembly connecting piece 77. The housing assembly connecting piece 77 can be a screw.

[0134] Figures 26A-30 A fourth embodiment of the electronic expansion valve 92, 94 in the present application is shown. The same parts of the fourth embodiment as the first three embodiments are denoted by the same reference numerals, and the same parts of the fourth embodiment as the first three embodiments are not described again.

[0135] As Figures 26A-30 As shown, the housing assembly 5 comprises a main housing 51, and the main housing 51 comprises a first main body part 514 and a first connecting part 515; the first main body part 514 has a main control cavity 51a; the main electric control board 4 is arranged in the main control cavity 51a; wherein the valve assembly 2 and the main electric control board 4 are located at different sides of the valve body 1; the first connecting part 515 is fixed on the valve body 1, wherein the first connecting part 515 is located at the same side of the valve body 1 as the main electric control board 4. Such design makes the main control cavity 51a have a larger extension space on the side of the valve body 1 where the main electric control board 4 is arranged, so that the main control cavity 51a can accommodate a main electric control board 4 of larger size; the main electric control board 4 of larger size can integrate more electronic devices, which is very advantageous for realizing intelligent control of the electronic expansion valve; and the main housing 51 is fixed on the valve body 1, so that the main housing 51 is stably mounted.

[0136] As shown in Figure 26C , 26D , the first connecting portion 515 is located outside the main control cavity 51a. This allows the operation of fixing the first connecting portion 515 on the valve body 1 to be performed outside the main control cavity 51a, thereby avoiding the need to open the main control cavity 51a.

[0137] With reference to Figure 26C , the first body portion 514 has a wide portion 5141 and a narrow portion 5142 arranged along a length direction L; in a width direction W transverse to the length direction L, the width W1 of the wide portion 5141 is greater than the width W2 of the narrow portion 5142; wherein the first connecting portion 515 and the wide portion 5141 are arranged along the length direction L; the first connecting portion 515 and the narrow portion 5142 are arranged along the width direction W. In this embodiment, the direction transverse to the length direction L can be, but is not limited to, a direction perpendicular to the length direction L. In Figure 26C , the width direction W is perpendicular to the length direction L. Such design makes the structure of the main housing 51 more compact.

[0138] With reference to Figure 26C , the two first connecting portions 515 are distributed on both sides of the narrow portion 5142 along the width direction W. More specifically, the two first connecting portions 515 are symmetrically arranged about the center line of the first body portion 514 along the length direction L.

[0139] With reference to Figure 26C , in the length direction L, the first connecting portion 515 extends from the wide portion 5141 to align with the edge of the narrow portion 5142; and / or in the width direction W, the first connecting portion 515 extends from the narrow portion 5142 to align with the edge of the wide portion 5141. Such design makes the structure of the main housing 51 more compact.

[0140] In an embodiment not shown, a sleeve can be arranged between the first connecting portion 515 and the valve body 1 to fill the gap between the first connecting portion 515 and the valve body 1. The two ends of the sleeve can abut against the first connecting portion 515 and the valve body 1, respectively.

[0141] With reference to Figure 26A , 26DThe shell assembly 5 further comprises a secondary shell 55; the secondary shell 55 comprises a second main body part 551 and a second connecting part 552; the second main body part 551 has a secondary control cavity 55a and a sensor hole 55b; the sensor hole 55b communicates with the secondary control cavity 55a; the refrigerant sensor 31 penetrates through the sensor hole 55b; wherein a part of the refrigerant sensor 31 is located in the secondary control cavity 55a and is electrically connected with the main electric control panel 4; another part of the refrigerant sensor 31 is located outside the secondary control cavity 55a and is used for detecting the refrigerant in the second refrigerant channel 12; the second connecting part 552 is detachably connected with the first connecting part 515.

[0142] As shown in Figure 29 、 30 , the first connecting part 515, the second connecting part 552 and the valve body 1 are stacked and connected into one body along the stacking direction; wherein one of the first connecting part 515 and the second connecting part 552 is clamped between the valve body 1 and the other one of the first connecting part 515 and the second connecting part 552. Figure 29 、 30 In the embodiment, the second connecting part 552 is clamped by the first connecting part 515 and the valve body 1.

[0143] The shell assembly connecting piece 77 connects the stacked first connecting part 515, the second connecting part 552 and the valve body 1 into one body, wherein the shell assembly connecting piece 77 at least penetrates one of the first connecting part 515 and the second connecting part 552. Figure 29 、 30 In the embodiment, the shell assembly connecting piece 77 penetrates the first connecting part 515 and the second connecting part 552 and is fixedly connected with the valve body 1. Such design makes the shell assembly connecting piece 77 not only have the function of fixedly connecting the main shell 51 and the secondary shell 55 with each other, but also have the function of fixedly connecting the main shell 51 and the secondary shell 55 on the valve body 1, thus the number of connecting pieces of the electronic expansion valves 92, 94 is reduced and the structure of the electronic expansion valves 92, 94 becomes compact.

[0144] Referring to Figure 27A 、 27B, 29, 30, the first main body part 514 extends from one side of the valve body 1 around one corner of the valve body 1 to the other side of the valve body 1; wherein the first main body part 514 has a continuous first surface 514a, a connecting surface 514c and a second surface 514b; the first surface 514a and the second surface 514b are respectively located at different sides of the valve body 1 and are oppositely arranged with the valve body 1, and the connecting surface 514c is oppositely arranged with the corner of the valve body 1; wherein the first surface 514a is located at the same side of the valve body 1 as the main electric control panel 4, and the second surface 514b is located at the same side of the valve body 1 as the valve assembly 2; the connecting surface 514c extends from the first surface 514a around the corner of the valve body 1 to the second surface 514b.

[0145] As shown in Figure 27A 、 30 , the main housing 51 further comprises a stepped part 516; the stepped part 516 is connected with the first surface 514a, the connecting surface 514c and the second surface 514b respectively. Such design improves the structural strength of the main housing 51.

[0146] Continuing to refer to Figure 27A 、 Figure 30 , the stepped part 516 comprises a support surface 516a; the support surface 516a is used to support on the valve body 1, and the support surface 516a is located at the same side of the valve body 1 as the valve assembly 2. The valve body 1 exerts a force S on the support surface 516a, the force S is perpendicular to the support surface 516a and points to the outside of the valve body 1, and the action point of the force S is on the stepped part 516. Such design improves the stability of the main housing 51 installed on the valve body 1.

[0147] Continuing to refer to Figures 26A-28B , it can be known that the main housing 51 further comprises a main port part 517, and the inner wall of the main port part 517 defines a main connecting opening 51g. The secondary housing 55 further comprises a secondary port part 553, and the inner wall of the secondary port part 553 defines a secondary connecting opening 55c. The main port part 517 and the secondary port part 553 are arranged in a nested manner, so that the main connecting opening 51g and the secondary connecting opening 55c are in communication. In the nested main port part 517 and secondary port part 553, the outer wall of the one located at the inner side is provided with a groove for placing a connecting sealing member 86. In Figure 2B , the groove is an annular groove 553a provided on the outer wall of the secondary port part 553. The connecting sealing member 86 is adapted to be placed in the annular groove 553a to seal the gap between the outer wall of the secondary port part 553 and the inner wall of the main port part 517.

[0148] Figure 31 、 32, 33, 34, 35 show an embodiment related to the connecting circuit board 402. Specifically, the electronic expansion valve 92, 94 comprises the connecting circuit board 402 and the circuit board positioning member 61, the connecting circuit board 402 is electrically connected with the main control board 4 and the valve assembly sensor 33 respectively, so that the valve assembly sensor 33 is electrically connected with the main control board 4; the circuit board positioning member 61 is used to press the connecting circuit board 402 against the housing assembly 5, for example, the main housing 51. Since the circuit board positioning member 61 presses the connecting circuit board 402 against the housing assembly 5, the housing assembly 5 and the circuit board positioning member 61 can clamp the connecting circuit board 402, so that the stability of the installation of the connecting circuit board 402 is enhanced.

[0149] In a specific embodiment, as shown in Figure 31 , the circuit board positioning member 61 is fixedly connected to the housing assembly 5. For example, the fastener 64 fixes the circuit board positioning member 61 to the housing assembly 5. The fastener 64 can be a screw.

[0150] In an embodiment not shown, the circuit board positioning member 61 presses the connecting circuit board 402 against the sub-housing 53.

[0151] In a more specific embodiment, the connecting circuit board 402 abuts the housing assembly 5 in the radial direction of the valve assembly 2. Such a design helps to position the connecting circuit board 402 on the housing assembly 5, for example, the main housing 51 or the sub-housing 53, and pressing the connecting circuit board 402 in the radial direction can offset the radial vibration caused by the operation of the valve assembly 2, avoiding the change of the position of the valve assembly sensor 33.

[0152] In a more specific embodiment, the valve assembly sensor 33 comprises a pin 33a; the pin 33a is inserted into the connecting circuit board 402, and the pin 33a is electrically connected with the connecting circuit board 402. By inserting the pin 33a into the connecting circuit board 402, the valve assembly sensor 33 is mounted on the connecting circuit board 402.

[0153] In a more specific embodiment, the connecting circuit board 402 is electrically connected with the main control board 4 through a conductive member, for example, a conductive pin 402a or a soft conductive member 43.

[0154] Continuing to refer to Figure 31 , the circuit board positioning member 61 comprises a support portion 61a, the support portion 61a abuts the connecting circuit board 402 in the radial direction and the axial direction of the valve assembly 2 respectively. More specifically, the support portion 61a is step-shaped, having a radial face extending in the radial direction of the valve assembly 2 and an axial face extending in the axial direction of the valve assembly 2. The radial face abuts the connecting circuit board 402 in the axial direction of the valve assembly 2, and the axial face abuts the connecting circuit board 402 in the radial direction of the valve assembly 2. The axial face presses the connecting circuit board 402 against the housing assembly 5 in the radial direction of the valve assembly 2.

[0155] With reference to Figure 31 , the main control cavity 51a has a first cavity portion 51a-1, a second cavity portion 51a-2 and a corner cavity portion 51a-3; the first cavity portion 51a-1 and the second cavity portion 51a-2 are located at different sides of the valve body 1 respectively; the corner cavity portion 51a-3 extends from the side of the valve body 1 provided with the first cavity portion 51a-1, bypasses a corner of the valve body 1 and reaches the side of the valve body 1 provided with the second cavity portion 51a-2; wherein a part of the main electric control board 4 is arranged in the first cavity portion 51a-1 and another part is arranged in the corner cavity portion 51a-3; the valve assembly sensor 33 is arranged in the second cavity portion 51a-2; the connection circuit board 402 and the circuit board positioning member 61 are both arranged in the main control cavity 51a, wherein the connection circuit board 402 abuts against the inner wall of the second cavity portion 51a-2. The connection circuit board 402 is perpendicular to the main electric control board 4.

[0156] With reference to Figure 33 , the main housing 51 of the housing assembly 5 has a recess 5a, and the circuit board positioning member 61 presses the connection circuit board 402 in the recess 5a. The recess 5a has an opening allowing the connection circuit board 402 to slide in. The recess 5a limits the connection circuit board 402 in the axial direction of the valve assembly 2. The connection circuit board 402 can slide along the inner wall of the recess 5a in the radial direction of the valve assembly 2.

[0157] With reference to Figure 33 , the circuit board positioning member 61 is fixedly connected with the main electric control board 4. This allows the circuit board positioning member 61 to position the main electric control board 4.

[0158] The circuit board positioning member 61 is electrically connected with the grounding structure 4a of the main electric control board 4 and electrically connected with the valve assembly 2 and / or the valve body 1. The grounding structure 4a of the main electric control board 4 can be electrically connected with the grounding point outside the electronic expansion valve 92, 94, such as the automobile frame, through a conductive member, such as a pin, a cable, etc., so as to discharge the static electricity accumulated on the valve assembly 2 and / or the valve body 1, thereby improving the electromagnetic compatibility of the electronic expansion valve 92, 94. In addition, the presence of the circuit board positioning member 61 also reduces the number of electronic expansion valves 92, 94. In this embodiment, the circuit board positioning member 61 has the function of grounding.

[0159] With reference to Figure 33 , 34 , the electronic expansion valve 92, 94 further comprises a conductive fastener 62; the circuit board positioning member 61 is fixedly connected and electrically connected with the main electric control board 4 through the conductive fastener 62, and the conductive fastener 62 is electrically connected with the grounding structure 4a of the main electric control board 4; wherein the conductive fastener 62 fixes the main electric control board 4 and the circuit board positioning member 61 on the housing assembly 5. The conductive fastener 62 can be a screw. The conductive fastener 62 is also electrically connected with the circuit board positioning member 61.

[0160] As shown in Figure 35 Fig. 6, the electronic expansion valve 92, 94 further comprises a grounding member 63 and a fastener 64; the circuit board positioning member 61 is electrically connected to the valve assembly 2 and / or the valve body 1 through the grounding member 63; wherein the grounding member 63 and the circuit board positioning member 61 are fixed on the housing assembly 5 by the fastener 64. The grounding member 63 and the circuit board positioning member 61 can be metal sheets. The fastener 64 can be a metal screw.

[0161] In Figure 33 Fig. 6, the grounding structure 4a is a metal conductive layer exposed on the surface of the main control board 4, which can be in the shape of a ring and is arranged around a through hole allowing the conductive fastener 62 to pass through. The conductive fastener 62 is in conductive connection with the metal conductive layer.

[0162] Figure 31 Another embodiment of the grounding member 63 is shown in Fig. 7, in which the grounding member 63 is in the form of a pin, one end of which is electrically connected to the valve assembly 2, such as the coil assembly 21, and the other end is plugged into and electrically connected to the grounding structure of the main control board 4. On the main control board 4, the grounding member 63 and the plurality of coil pins 2a of the valve assembly 2 are arranged in a straight line. In this embodiment, the grounding member 63 is not connected to the circuit board positioning member 61. The circuit board positioning member 61 also does not have the function of grounding.

[0163] In one embodiment, the valve assembly 2 and the valve body 1 are both made of a metal conductive material, so that when the valve assembly 2 is assembled on the valve body 1, the valve assembly 2 and the valve body 1 are electrically connected.

[0164] Figs. 23, 36 to 41 show an embodiment of the specific structure of the refrigerant sensor 31 and the housing assembly 5.

[0165] The refrigerant sensor 31 comprises a sensor main body 310 and an electrical connection member 311; the sensor main body 310 is used to detect the state of the refrigerant passing through the valve body 1, such as the temperature and / or pressure of the refrigerant; in order to achieve these functions, the sensor main body 310 can have a plurality of functional modules, such as a temperature module and a pressure module. The electrical connection member 311 generally has the functions of power supply and signal transmission. One end of the electrical connection member 311 is electrically connected to the sensor main body 310, and the other end is electrically connected to the main control board 4. The electrical connection member 311 can be in the form of a pin or a soft conductive member. The soft conductive member can be a flexible flat cable.

[0166] In Figures 36-41 Fig. 23, the housing assembly 5 comprises a main housing 51 and a sub-housing 55. In Fig. 23, the housing assembly 5 does not comprise the sub-housing 55.

[0167] With continued reference to Fig. 23 and Figures 36-41The housing assembly 5 has a partition wall 501 and a sensor cavity 50a located at one side of the partition wall 501; at least a portion of the sensor body 310 is accommodated in the sensor cavity 50a. Another portion of the sensor body 310 is located outside the sensor cavity 50a and protrudes from the housing assembly 5. The portion of the sensor body 310 protruding from the housing assembly 5 is used to be inserted into the second mounting cavity 16. The partition wall 501 defines at least a portion of the sensor cavity 50a, and the partition wall 501 abuts the sensor body 310.

[0168] As shown in Figure 38 , 40 , the electrical connector 311 is arranged to penetrate the partition wall 501, wherein one end of the electrical connector 311 is used to be electrically connected with the sensor body 310 in the sensor cavity 50a, and the other end of the electrical connector 311 is used to be electrically connected with the main control board 4 at the other side of the partition wall 501. More specifically, the electrical connector 311 is a pin, one end of which is electrically connected with the sensor body 310, the other end of which is inserted into and electrically connected with the flexible conductive member 41, and is electrically connected with the main control board 4 located in the main control cavity 51a through the flexible conductive member 41.

[0169] Since at least a portion of the sensor body 310 is accommodated in the sensor cavity 50a and abuts the partition wall 501, the stability of the installation of the sensor body 310 is enhanced.

[0170] Referring to FIG. 23, the partition wall 501, the sensor body 310 and the valve body 1 are arranged in a stack and are connected into one body in the stacking direction; wherein the partition wall 501 and the valve body 1 clamp the sensor body 310. This design further enhances the stability of the installation of the sensor. In an embodiment not shown, at least one sensor connector penetrates the partition wall 501, the sensor body 310 and is connected with the valve body 1 in the stacking direction, so as to connect the partition wall 501, the sensor body 310 and the valve body 1 into one body.

[0171] Continuing to refer to FIG. 23, the main housing 51 has a partition wall 501 and a sensor cavity 50a; the main control board 4 and the sensor body 310 are separated by the partition wall 501. The partition wall 501 has a sensor hole 51c which communicates the sensor cavity 50a with the main control cavity 51a. The electrical connector 311 penetrates the sensor hole 51c, wherein one end of the electrical connector 311 is located in the sensor cavity 50a, and the other end of the electrical connector 311 is located in the main control cavity 51a.

[0172] Referring to Figure 40The housing assembly 5 also includes a sub-housing 55; the sub-housing 55 has a partition wall 501 and a sensor cavity 50a; the flexible conductive element 41 and the sensor body 310 are separated by the partition wall 501. An electrical connector 311 is embedded in the partition wall 501, wherein one end of the electrical connector 311 is located in the sensor cavity 50a, and the other end is located in the sub-control cavity 55a of the sub-housing 55. The electrical connector 311 can be a pin, and the flexible conductive element 41 can be a flexible flat cable. The flexible conductive element 41 is a conductive element with a certain length and easy to bend. The electrical connector 311 can be curved and is embedded in the partition wall 501 by injection molding. During the injection molding process, the electrical connector 311 is an insert.

[0173] like Figure 37 , 38 As shown in Figures 39 and 39, the electronic expansion valves 92 and 94 also include a sensor positioning element 78; the sensor positioning element 78 is configured to connect the sensor body 310 and the housing assembly 5 outside the sensor cavity 50a. More specifically, the sensor positioning element 78 is inserted into the sensor body 310 and the housing assembly 5 in the same direction. This design facilitates the assembly of the sensor body 310 with the housing assembly 5.

[0174] More specifically, the sensor body 310 is configured to be inserted into the sensor cavity 50a along a first direction D1; the sensor positioning member 78 is configured to be inserted into the housing assembly 5 and the sensor body 310 along a second direction D2 to connect the sensor body 310 and the housing assembly 5; the second direction D2 is transverse to the first direction D1. Figure 39 In the embodiment shown, the second direction D2 is perpendicular to the first direction D1.

[0175] More specifically, the housing assembly 5 also has at least one arm 502 located outside the sensor cavity 50a; the housing assembly 5, via the arm 502, at least limits the rotation of the sensor body 310 relative to the housing assembly 5; the sensor positioning member 78 is configured to connect the sensor body 310 and the arm 502. (Continue to refer to...) Figure 39 The arm 502 has a first positioning hole 502a, and the sensor body 310 has a second positioning hole 310b. The first positioning hole 502a is a through hole, and the sensor positioning member 78 is inserted into the first positioning hole 502a and the second positioning hole 310b in an aligned state along the second direction D2. A limiting groove 310a is provided on the sensor body 310; the limiting groove 310a has a shape complementary to that of the arm 502 to accommodate the arm 502. The limiting groove 310a is recessed along the second direction D2 and extends along the first direction D1, so that when the sensor body 310 is inserted into the sensor cavity 50a along the first direction D1, the arm 502 can slide into the limiting groove 310a. The second positioning hole 310b is formed on the bottom wall of the limiting groove 310a. This design helps to make the structure of the electronic expansion valve compact and improves the stability of the sensor body 310 during installation.

[0176] Reference Figure 36 、 37 The electronic expansion valve 92, 94 further comprises a sensor connecting piece 79; the sensor connecting piece 79 penetrates the sub-housing 55 and is fixedly connected with the valve body 1, wherein the sensor connecting piece 79 is located outside the sensor cavity 50a. This design makes the sensor connecting piece 79 not occupy the space of the sensor cavity 50a.

[0177] More specifically, the two sensor connecting pieces 79 are distributed along the diagonal of the sub-housing 55 to maximize the volume of the sensor cavity 50a on the premise that the sensor connecting pieces 79 avoid the sensor cavity 50a.

[0178] In order to better realize the positioning of the housing assembly 5 on the valve body 1, the housing assembly 5 has a protrusion 50b. The valve body 1 has a recess 1a. The protrusion 50b is inserted into the recess 1a to realize the positioning of the housing assembly 5 on the valve body 1. In Figure 40 , the sub-housing 55 has the protrusion 50b.

[0179] In order to realize the fixation of the valve assembly 2 and the valve body 1, the person skilled in the art can also derive from the description of the present application that the electronic expansion valve comprises: a valve body 1, the valve body 1 has a first refrigerant inlet 1a and a first refrigerant outlet 1b, wherein a first refrigerant passage 11 is formed between the first refrigerant inlet 1a and the first refrigerant outlet 1b; a valve assembly 2 for throttling the refrigerant in the first refrigerant passage 11; the electronic expansion valve 92, 94 further comprises: a valve assembly connecting piece 72; the valve assembly connecting piece 72 is arranged to be inserted into the valve body 1 from the side of the valve body 1 which is not arranged with the valve assembly 2, and is in limit position cooperation with the part of the valve assembly 2 which is located in the valve body 1, thereby fixing the valve assembly 2 on the valve body 1. Such a scheme makes the valve assembly 2 not interfere with the valve assembly connecting piece 72 during the fixation of the valve assembly 2 on the valve body 1, and the fixation method is also relatively simple.

[0180] The valve assembly connecting piece 72 is arranged to be inserted into the valve body 1 from the side adjacent to the side of the valve body 1 which is arranged with the valve assembly 2.

[0181] The valve body 1 has a first mounting cavity 15 and a limit position hole 1e; the first mounting cavity 15 is opened on one side of the valve body 1, and the limit position hole 1e is opened on the other side of the valve body 1; wherein the first mounting cavity 15 allows the valve assembly 2 to be inserted, and the limit position hole 1e allows the valve assembly connecting piece 72 to be inserted; the limit position hole 1e is in communication with the first mounting cavity 15 inside the valve body 1, so that the valve assembly connecting piece 72 can be located in the first mounting cavity 15 after being inserted into the limit position hole 1e, thereby being in limit position cooperation with the part of the valve assembly 2 which is located in the first mounting cavity 15.

[0182] The valve assembly 2 has a recess 221b for limit position cooperation with the valve assembly connecting piece 72.

[0183] The valve assembly connector 72 is clamped by the inner wall of the limiting hole 1e and the recess 221b.

[0184] The number of the valve assembly connector 72 is two, which is limited with the two sides of the valve assembly 2 respectively.

[0185] The valve seat 221 of the valve assembly 2 is limited with the valve assembly connector 72.

[0186] The two valve assembly connectors 72 are symmetrically arranged about the valve assembly 2.

[0187] In order to realize the detection of the working state of the valve assembly 2, the person skilled in the art can also obtain, according to the content of the description of the present application, an electronic expansion valve, comprising: a valve body 1, the valve body 1 having a first refrigerant inlet 1a and a first refrigerant outlet 1b, wherein a first refrigerant passage 11 is formed between the first refrigerant inlet 1a and the first refrigerant outlet 1b; a valve assembly 2 for throttling the refrigerant in the first refrigerant passage 11; a main control board 4 electrically connected with the valve assembly 2; the electronic expansion valve 92, 94 further comprising: a valve assembly sensor 32, 33; the valve assembly sensor 32, 33 is electrically connected with the main control board 4; the valve assembly sensor 32, 33 is used for detecting the valve assembly 2; the valve assembly 2 and the main control board 4 are located at different sides of the valve body 1 respectively. Such a scheme makes the working state of the valve assembly 2 be able to be detected. The valve assembly sensor 32, 33 can be but is not limited to a Hall sensor.

[0188] The electronic expansion valve 92, 94 further comprises a housing assembly 5, the housing assembly 5 comprising a main housing 51; the main housing 51 having a main control cavity 51a; the main control board 4 is arranged in the main control cavity 51a; the valve assembly sensor 32, 33 is arranged in the main control cavity 51a.

[0189] The valve assembly sensor 32 is arranged at one end of the valve assembly 2 away from the valve body 1 along the axis of the valve assembly 2. In this embodiment, the valve assembly sensor 32 is an angle type Hall sensor.

[0190] The valve assembly sensor 33 is arranged on the outer side in the radial direction of the valve assembly 2. In this embodiment, the valve assembly sensor 33 is a switch type Hall sensor.

[0191] The main control cavity 51a has a first cavity portion 51a-1, a second cavity portion 51a-2 and an angle cavity portion 51a-3; the first cavity portion 51a-1 and the second cavity portion 51a-2 are respectively located at different sides of the valve body 1; the angle cavity portion 51a-3 extends from the side of the valve body 1 provided with the first cavity portion 51a-1, bypasses one corner of the valve body 1 to the side of the valve body 1 provided with the second cavity portion 51a-2; wherein a part of the main control board 4 is arranged in the first cavity portion 51a-1 and another part is arranged in the angle cavity portion 51a-3.

[0192] The valve assembly sensor 32, 33 is arranged in the second cavity 51a-2, and the valve assembly sensor 32, 33 is electrically connected with the part of the main electric control board 4 arranged in the corner cavity 51a-3.

[0193] The second cavity 51a-2 is arranged on the side of the valve body 1 where the valve assembly 2 is arranged, and the first cavity 51a-1 is arranged on the side of the valve body 1 where the main electric control board 4 is arranged.

[0194] The electronic expansion valve 92, 94 further comprises a shell assembly 5, the shell assembly 5 comprising a main shell 51 and a sub-shell 53; the sub-shell 53 is detachably connected with the main shell 51; the main shell 51 has a main control cavity 51a; the main electric control board 4 is arranged in the main control cavity 51a; the sub-shell 53 has a sub-control cavity 53c; the valve assembly sensor 32, 33 is arranged in the sub-control cavity 53c.

[0195] The sub-shell 53 further has a sub-connection opening 53d; the sub-connection opening 53d communicates with the sub-control cavity 53c; the main shell 51 has a main-connection opening 51f; the main-connection opening 51f communicates with the main control cavity 51a; the sub-connection opening 53d is arranged to communicate with the main-connection opening 51f, so that the sub-control cavity 53c communicates with the main control cavity 51a; the soft conductive member 43 penetrates through the main-connection opening 51f and the sub-connection opening 53d, so as to detachably electrically connect the main electric control board 4 and the valve assembly sensor 32, 33.

[0196] The sub-control cavity 53c is arranged on the side of the valve body 1 where the valve assembly 2 is arranged.

[0197] In order to realize the fixation of the refrigerant sensor 31 on the electronic expansion valve 92, 94, the person skilled in the art can also derive from the content of the specification of the present application that an electronic expansion valve comprises: a valve body 1, the valve body 1 having a first refrigerant inlet 1a, a first refrigerant outlet 1b, a second refrigerant inlet 1c and a second refrigerant outlet 1d, wherein a first refrigerant passage 11 is formed between the first refrigerant inlet 1a and the first refrigerant outlet 1b, and a second refrigerant passage 12 is formed between the second refrigerant inlet 1c and the second refrigerant outlet 1d; a valve assembly 2 for throttling the refrigerant in the first refrigerant passage 11; a refrigerant sensor 31 for detecting the refrigerant in the second refrigerant passage 12; a main electric control board 4 electrically connected with the valve assembly 2 and the refrigerant sensor 31, respectively; the electronic expansion valve 92, 94 further comprises: a shell assembly 5 comprising a main shell 51; the main shell 51 has a main control cavity 51a; the main electric control board 4 is arranged in the main control cavity 51a; and the refrigerant sensor 31 is pressed against the shell assembly 5. This scheme can improve the stability of the installation of the refrigerant sensor 31 on the electronic expansion valve 92, 94.

[0198] The refrigerant sensor 31, the main housing 51 and the valve body 1 are stacked and connected into one body along the stacking direction; wherein one of the main housing 51 and the refrigerant sensor 31 is clamped between the valve body 1 and the other of the main housing 51 and the refrigerant sensor 31.

[0199] The electronic expansion valve 92, 94 further comprises a sensor connecting piece 71; the refrigerant sensor 31, the main housing 51 and the valve body 1 stacked are connected into one body through the sensor connecting piece 71.

[0200] The part of the refrigerant sensor 31 located in the main control cavity 51a is clamped on the main housing 51.

[0201] The housing assembly 5 further comprises a secondary housing 55; the secondary housing 55 is detachably connected with the main housing 51; the refrigerant sensor 31 is clamped on the secondary housing 55.

[0202] The refrigerant sensor 31, the secondary housing 55 and the valve body 1 are stacked and connected into one body along the stacking direction; wherein one of the secondary housing 55 and the refrigerant sensor 31 is clamped between the valve body 1 and the other of the secondary housing 55 and the refrigerant sensor 31.

[0203] The electronic expansion valve 92, 94 further comprises a sensor connecting piece 76; the refrigerant sensor 31, the secondary housing 55 and the valve body 1 stacked are connected into one body through the sensor connecting piece 76.

[0204] The secondary housing 55 has a secondary control cavity 55a and a sensor hole 55b; the sensor hole 55b communicates with the secondary control cavity 55a; the refrigerant sensor 31 penetrates through the sensor hole 55b; wherein a part of the refrigerant sensor 31 is located in the secondary control cavity 55a and electrically connected with the main electric control board 4; another part of the refrigerant sensor 31 is located outside the secondary control cavity 55a and used for detecting the refrigerant in the second refrigerant passage 12.

[0205] The part of the refrigerant sensor 31 located in the secondary control cavity 55a is clamped on the secondary housing 55.

[0206] As shown in FIG. 23, the pin of the refrigerant sensor 31 penetrates through the sensor hole 51c and extends into the main control cavity 51a to be plugged with the main electric control board 4. The part of the refrigerant sensor 31 located outside the main control cavity 51a is clamped between the main housing 51 and the valve body 1.

[0207] In FIG. 23, the part of the refrigerant sensor 31 located outside the main control cavity 51a is clamped on the main housing 51. The main housing 51 has a main opening 51b arranged away from the valve body 1. The main electric circuit board 4 is loaded into the main control cavity 51a through the main opening 51b.

[0208] As shown in Fig. 24, the main housing 51 has a main opening 51b provided toward the valve body 1, and the main circuit board 4 is disposed between the main housing 51 and the valve body 1 in the main control chamber 51a. The refrigerant sensor 31 is clamped between the main housing 51 and the valve body 1. The main circuit board 4 is loaded into the main housing 51 through the opening.

[0209] The person skilled in the art can also derive from the content of the present description a manufacturing method of an electronic expansion valve, comprising the step of pressing the refrigerant sensor 31 against the housing assembly 5.

[0210] More specifically, the manufacturing method of an electronic expansion valve comprises the step of pressing the refrigerant sensor 31 against the main housing 51 or the sub-housing 55.

[0211] More specifically, the manufacturing method of an electronic expansion valve comprises the step of first stacking the refrigerant sensor 31, the main housing 51 and the valve body 1, and then connecting the refrigerant sensor 31, the main housing 51 and the valve body 1 in the stacking direction into one piece.

[0212] More specifically, the manufacturing method of an electronic expansion valve comprises the step of first stacking the refrigerant sensor 31, the sub-housing 55 and the valve body 1, and then connecting the refrigerant sensor 31, the sub-housing 55 and the valve body 1 in the stacking direction into one piece.

[0213] More specifically, the manufacturing method of an electronic expansion valve comprises the step of connecting the refrigerant sensor 31, the main housing 51 and the valve body 1 in the stacking direction into one piece using the sensor connecting member 71.

[0214] More specifically, the manufacturing method of an electronic expansion valve comprises the step of connecting the refrigerant sensor 31, the sub-housing 55 and the valve body 1 in the stacking direction into one piece using the sensor connecting member 76.

[0215] The present application, although disclosed with the preferred embodiments as above, is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application, and any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, fall within the protection scope defined by the claims of the present application.

Claims

1. An electronic expansion valve, comprising: Valve body (1) allows refrigerant to pass through; Valve assembly (2) for throttling the refrigerant; The main control board (4) is electrically connected to the valve assembly (2); The housing assembly (5) includes a main housing (51); the main housing (51) has a main control cavity (51a); the main electrical control board (4) is disposed in the main control cavity (51a); The electronic expansion valve (92, 94) is characterized in that it further includes a refrigerant sensor (31) for detecting the refrigerant; the refrigerant sensor (31) includes a sensor body (310) and an electrical connector (311); The housing assembly (5) has a partition wall (501) and a sensor cavity (50a); the sensor cavity (50a) is located on one side of the partition wall (501); at least a portion of the sensor body (310) is accommodated in the sensor cavity (50a) and abuts against the partition wall (501); The electrical connector (311) is configured to penetrate the partition wall (501), wherein one end of the electrical connector (311) is used to be electrically connected to the sensor body (310) in the sensor cavity (50a); the other end of the electrical connector (311) is used to be electrically connected to the main control board (4) on the other side of the partition wall (501). The electronic expansion valve (92, 94) further includes a sensor positioning element (78); the sensor positioning element (78) is configured to connect the sensor body (310) and the housing assembly (5) outside the sensor cavity (50a); The housing assembly (5) also has at least one arm (502) located outside the sensor cavity (50a); the housing assembly (5) at least limits the rotation of the sensor body (310) relative to the housing assembly (5) by means of the arm (502); The sensor positioning element (78) is configured to connect the sensor body (310) and the arm (502).

2. The electronic expansion valve as described in claim 1, characterized in that, The partition wall (501), the sensor body (310), and the valve body (1) are stacked and connected as a whole along the stacking direction; wherein the partition wall (501) and the valve body (1) clamp the sensor body (310).

3. The electronic expansion valve as described in claim 1, characterized in that, The main housing (51) has the partition wall (501) and the sensor cavity (50a).

4. The electronic expansion valve as described in claim 1, characterized in that, The housing assembly (5) further includes a sub-housing (55); the sub-housing (55) has the partition wall (501) and the sensor cavity (50a).

5. The electronic expansion valve as described in claim 1, characterized in that, The sensor body (310) is configured to be inserted into the sensor cavity (50a) along a first direction (D1); the sensor positioning member (78) is configured to be inserted into the housing assembly (5) and the sensor body (310) along a second direction (D2) to connect the sensor body (310) and the housing assembly (5); The second direction (D2) is transverse to the first direction (D1).

6. The electronic expansion valve as described in claim 1, characterized in that, The sensor body (310) is provided with a limiting groove (310a); the limiting groove (310a) has a shape complementary to the arm (502) to accommodate the arm (502).

7. The electronic expansion valve as described in claim 4, characterized in that, The electronic expansion valve (92, 94) further includes a sensor connector (79); the sensor connector (79) passes through the sub-housing (55) and is fixedly connected to the valve body (1), wherein the sensor connector (79) is located outside the sensor cavity (50a).

8. The electronic expansion valve as described in claim 1, characterized in that, The electrical connector (311) is embedded in the partition wall (501).

9. A method for manufacturing an electronic expansion valve, characterized in that, The electrical connector (311) of the refrigerant sensor (31) is embedded in the partition wall (501) and the electrical connector (311) passes through the partition wall (501); The sensor body (310) of the refrigerant sensor (31) is inserted into the sensor cavity (50a) of the housing assembly (5) so that the sensor body (310) is electrically connected to one end of the electrical connector (311) in the sensor cavity (50a); wherein the sensor cavity (50a) is located on one side of the partition wall (501); The other end of the electrical connector (311) is used for electrical connection with the main electrical control board (4) on the other side of the partition wall (501); Using a sensor positioning element (78) to connect the sensor body (310) and the housing assembly (5) outside the sensor cavity (50a) to position the sensor body (310) on the housing assembly (5); The housing assembly (5) also has at least one arm (502) located outside the sensor cavity (50a); the housing assembly (5) at least limits the rotation of the sensor body (310) relative to the housing assembly (5) by means of the arm (502); The sensor positioning element (78) is configured to connect the sensor body (310) and the arm (502).

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