An electronic expansion valve and thermal management assembly

Abstract

The present application relates to an electronic expansion valve and a thermal management assembly. In the present application, since the refrigerant sensor is pressed on the shell assembly, the refrigerant sensor has high stability after the electronic expansion valve is installed, and is not easy to loosen. The electronic expansion valve provided by the present application has the advantages that the refrigerant sensor is stable in installation. The thermal management assembly provided by the present application comprises the electronic expansion valve.

Description

[0001] This application is a divisional application of Chinese invention application 202010425555.6, which was filed on May 19, 2020, and is entitled "An electronic expansion valve and thermal management component". Technical Field

[0002] This invention relates to an electronic expansion valve and a thermal management component. Background Technology

[0003] Traditional air conditioning systems consist of four main components: a compressor, an evaporator, a condenser, and a throttling device. Depending on the specific needs of the air conditioning system, the throttling device may include an expansion valve and a capillary tube. Expansion valves can be categorized into thermostatic expansion valves and electronic expansion valves based on their driving principle. Electronic expansion valves can be further classified into electromagnetically driven electronic expansion valves and motor-driven electronic expansion valves based on their driving method.

[0004] Automotive air conditioning systems comprise the four main components mentioned above. Regarding throttling devices, automotive air conditioning systems typically use expansion valves. Chinese patent application CN101551174A discloses an automotive air conditioning system that uses a thermostatic expansion valve as a throttling device. In other prior art, electronic expansion valves are also used as throttling devices in automotive air conditioning systems.

[0005] As the automotive industry moves towards electrification, vehicles using power batteries as their driving force are becoming increasingly common. Power batteries generate heat during charging and discharging, causing their temperature to rise. According to the technical solution described in Chinese patent application CN101551174A, maintaining a stable battery temperature can be achieved by incorporating a refrigerant branch for battery cooling within the automotive air conditioning system. An electronic expansion valve can be installed on this refrigerant branch to achieve refrigerant throttling.

[0006] Existing electronic expansion valves include a valve body, valve assembly, sensor, and electronic control board. The sensor installation stability in existing electronic expansion valves is suboptimal. Summary of the Invention

[0007] The purpose of this invention is to provide an electronic expansion valve that has the advantage of stable installation of the refrigerant sensor.

[0008] Another object of the present invention is to provide a thermal management component comprising the above-described electronic expansion valve.

[0009] An electronic expansion valve for achieving its purpose includes: a valve body having a first refrigerant inlet, a first refrigerant outlet, a second refrigerant inlet, and a second refrigerant outlet, wherein a first refrigerant channel is formed between the first refrigerant inlet and the first refrigerant outlet, and a second refrigerant channel is formed between the second refrigerant inlet and the second refrigerant outlet; a valve assembly for throttling the refrigerant in the first refrigerant channel; a refrigerant sensor for detecting the refrigerant in the second refrigerant channel; and a main control board electrically connected to the valve assembly and the refrigerant sensor, respectively. The electronic expansion valve further includes: a housing assembly including a main housing; the main housing having a main control cavity; the main control board disposed within the main control cavity; and the refrigerant sensor being pressed against the housing assembly.

[0010] In one embodiment of the invention, the refrigerant sensor, the main housing, and the valve body are stacked and connected as a whole along the stacking direction; wherein, one of the main housing and the refrigerant sensor is clamped between the valve body and the other of the main housing and the refrigerant sensor.

[0011] In one embodiment of the present invention, the electronic expansion valve further includes a sensor connector; the refrigerant sensor, the main housing and the valve body, which are stacked together, are connected as one unit through the sensor connector.

[0012] In one embodiment of the present invention, the main housing has a sensor hole that communicates with the main control cavity; a refrigerant sensor passes through the sensor hole; wherein a portion of the refrigerant sensor is located inside the main control cavity and is electrically connected to the main control board; another portion of the refrigerant sensor is located outside the main control cavity and is used to detect the refrigerant in the second refrigerant channel.

[0013] In one embodiment of the invention, the portion of the refrigerant sensor located within the main control cavity is pressed against the main housing.

[0014] In one embodiment of the invention, the housing assembly further includes a secondary housing; the secondary housing is detachably connected to the main housing; the refrigerant sensor, the secondary housing, and the valve body are stacked and connected as a whole along the stacking direction; wherein, one of the secondary housing and the refrigerant sensor is clamped between the valve body and the other of the secondary housing and the refrigerant sensor.

[0015] In one embodiment of the present invention, the electronic expansion valve further includes a sensor connector; the refrigerant sensor, the sub-housing and the valve body stacked together are connected as one unit through the sensor connector.

[0016] In one embodiment of the present invention, the sub-housing has a sub-control cavity and a sensor hole; the sensor hole communicates with the sub-control cavity; a refrigerant sensor passes through the sensor hole; wherein a portion of the refrigerant sensor is located inside the sub-control cavity and is electrically connected to the main control board; another portion of the refrigerant sensor is located outside the sub-control cavity and is used to detect the refrigerant in the second refrigerant channel.

[0017] In one embodiment of the present invention, the secondary housing further has a secondary connection opening; the secondary connection opening communicates with the secondary control cavity; the main housing has a main connection opening; the main connection opening communicates with the main control cavity; the secondary connection opening is configured to communicate with the main connection opening, thereby enabling the secondary control cavity to communicate with the main control cavity.

[0018] A thermal management component for achieving the purpose includes a heat exchanger having a first heat exchange channel and a second heat exchange channel; the first heat exchange channel and the second heat exchange channel are not connected to each other, and the thermal management component also includes the above-mentioned electronic expansion valve; the electronic expansion valve is installed on the heat exchanger, wherein the electronic expansion valve is connected to the first heat exchange channel.

[0019] The significant advantages of this invention are: because the refrigerant sensor is pressed firmly onto the housing assembly, it exhibits high stability and is less prone to loosening after installation on the electronic expansion valve. The electronic expansion valve provided by this invention offers the advantage of stable refrigerant sensor installation. The thermal management assembly provided by this invention includes this electronic expansion valve. Attached Figure Description

[0020] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0021] Figure 1 This is a schematic diagram of a car's air conditioning system;

[0022] Figures 2A to 2D This is a schematic diagram of the electronic expansion valve in the first embodiment of the present invention;

[0023] Figure 3 An exploded view of the electronic expansion valve in the first embodiment of the present invention;

[0024] Figure 4 for Figure 2C A cross-sectional view along the AA direction, where the dashed arrows show the refrigerant flow path;

[0025] Figure 5 for Figure 2D Cross-sectional view along the BB direction;

[0026] Figure 6 for Figure 2C A cross-sectional view along the CC direction;

[0027] Figure 7 for Figure 2D A cross-sectional view along the DD direction;

[0028] Figures 8A to 8B This is a schematic diagram of the main housing in the first embodiment of the present invention;

[0029] Figures 9A to 9C This is a schematic diagram of the valve body;

[0030] Figure 9D This is a sectional view of the valve body;

[0031] Figures 10A to 10D This is a schematic diagram of the electronic expansion valve in the second embodiment of the present invention;

[0032] Figure 11 This is an exploded view of the electronic expansion valve in the second embodiment of the present invention;

[0033] Figure 12 for Figure 10C Cross-sectional view along the EE direction;

[0034] Figure 13 for Figure 10D A cross-sectional view along the FF direction;

[0035] Figures 14A to 14B This is a schematic diagram of the main housing in the second embodiment of the present invention;

[0036] Figures 15A to 15B This is a schematic diagram of the sub-shell in the second embodiment of the present invention;

[0037] Figures 16A to 16D This is a schematic diagram of the electronic expansion valve in the third embodiment of the present invention;

[0038] Figure 17 This is an exploded view of the electronic expansion valve in the third embodiment of the present invention;

[0039] Figure 18 for Figure 16C Cross-sectional view along the GG direction;

[0040] Figure 19 for Figure 16D A cross-sectional view along the JJ direction;

[0041] Figure 20 for Figure 16C A cross-sectional view along the HH direction;

[0042] Figures 21A to 21B This is a schematic diagram of the main housing in the third embodiment of the present invention;

[0043] Figures 22A to 22BThis is a schematic diagram of the sub-shell in the third embodiment of the present invention;

[0044] Figure 23 This is a cross-sectional view of an electronic expansion valve, showing the connection relationship between the main housing, sensor, and valve body, with the opening of the main housing facing away from the valve body;

[0045] Figure 24 This is a cross-sectional view of an electronic expansion valve, showing the connection relationship between the main housing, sensor, and valve body, with the opening of the main housing facing the valve body;

[0046] Figure 25 This is a cross-sectional view of the sensor. Detailed Implementation

[0047] The following discloses various embodiments or examples of the subject matter technical solutions. To simplify the disclosure, specific examples of the elements and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of protection of the present invention. For example, the distribution of the first feature and the second feature as described later in the specification can include an embodiment in which the first and second features are distributed in a direct connection, or an embodiment in which an additional feature is formed between the first and second features, so that the first and second features are not directly connected. In addition, reference numerals and / or letters may be repeated in different examples in these contents. This repetition is for brevity and clarity and does not in itself indicate the relationship between the various embodiments and / or structures to be discussed. Furthermore, when the first element is described in a manner connected or combined with the second element, the description includes embodiments in which the first and second elements are directly connected or combined with each other, as well as embodiments in which one or more other intervening elements are added to indirectly connect or combine the first and second elements with each other.

[0048] It is important to note that Figures 1 to 25 All examples are provided for illustrative purposes only and are not drawn to scale. They should not be construed as limiting the scope of protection of the present invention.

[0049] Figure 1 An automotive air conditioning system 900 according to one embodiment of the present invention is shown. The automotive air conditioning system 900 includes a compressor 90, a condenser 91, electronic expansion valves 92 and 94, an evaporator 93, a heat exchanger 95, a pump 96, a battery module 97, piping for refrigerant flow, and piping for coolant flow. These piping connect the various parts of the automotive air conditioning system 900.

[0050] Evaporator 93 and electronic expansion valve 92 form a thermal management assembly. Electronic expansion valve 92 is mounted on evaporator 93 and is integrated with evaporator 93. Evaporator 93 has evaporator passage 93a in which refrigerant flows. Evaporator passage 93a is connected to electronic expansion valve 92.

[0051] Heat exchanger 95 and electronic expansion valve 94 form a thermal management assembly. Electronic expansion valve 94 is mounted on heat exchanger 95 and is integrated with heat exchanger 95. Heat exchanger 95 has a first heat exchange channel 95a and a second heat exchange channel 95b; the first heat exchange channel 95a and the second heat exchange channel 95b are not interconnected. Refrigerant flows in the first heat exchange channel 95a, and coolant flows in the second heat exchange channel 95b. The first heat exchange channel 95a is connected to electronic expansion valve 94, and the second heat exchange channel 95b is connected to a circuit containing pump 96 and battery module 97.

[0052] During the operation of the automotive air conditioning system 900, the heat generated by the battery module 97 is carried away by the coolant and enters the second heat exchange channel 95b of the heat exchanger 95. The refrigerant is throttled by the electronic expansion valve 94 and flows out of the electronic expansion valve 94, entering the first heat exchange channel 95a at a low temperature and low pressure. In the heat exchanger 95, the heat in the coolant in the second heat exchange channel 95b is absorbed by the refrigerant in the first heat exchange channel 95a, thereby enabling the automotive air conditioning system 900 to cool the battery module 97.

[0053] The refrigerant, after being throttled by the electronic expansion valve 92, flows out of the electronic expansion valve 92 and enters the evaporator passage 93a in a low-temperature, low-pressure state. The evaporator 93 allows airflow to blow across the outside of the evaporator passage 93a to absorb heat from the airflow, thereby cooling the airflow. The cooled airflow can be delivered into the vehicle cabin to regulate the thermal and humidity environment inside the cabin.

[0054] Figures 2A to 2D as well as Figure 3 , 4 Images 5, 6, 7, 8A, and 8B illustrate a first embodiment of the electronic expansion valves 92 and 94 of the present invention. In this embodiment, the electronic expansion valves 92 and 94 include a valve body 1, a valve assembly 2, a refrigerant sensor 31, a main control board 4, and a housing assembly 5.

[0055] refer to Figures 2A to 2D , Figure 4 as well as Figures 9A to 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.

[0056] 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.

[0057] 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.

[0058] Valve core assembly 22 includes components along the axis of valve assembly 2 (e.g., ...). Figure 3(As shown by the dashed lines in the diagram) The valve seat 221, valve core 222, connecting seat 224, rotor assembly 223, and cover 225 are assembled together. The valve seat 221 has a valve hole 221a, and the portion of the valve seat 221 with the valve hole 221a is disposed inside the valve body 1 and located in the first refrigerant passage 11. The valve seat 221 is fixed to the valve body 1, and the connecting seat 224 can be welded to the valve body 1 and the valve seat 221 respectively. The rotor assembly 223 and the cover 225 are respectively connected to the connecting seat 224. The rotor assembly 223 includes a permanent magnet, which is capable of rotating 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 also includes a transmission assembly that converts the rotation of the permanent magnet into movement along the axis of the valve assembly 2.

[0059] The valve core 222 is slidably mounted in the valve seat 221. The permanent magnet of the rotor assembly 223 is driven by the energized coil assembly 21, and through the transmission assembly, drives the valve core 222 to move relative to the valve seat 221 along the axis of the valve assembly 2, thereby adjusting the opening of the valve orifice 221a. When the refrigerant in the first refrigerant passage 11 passes through the valve orifice 221a with a smaller opening, the refrigerant is throttled.

[0060] To improve the integration of the thermal management components, the valve body 1 also has a second refrigerant inlet 1c and a second refrigerant outlet 1d, forming a second refrigerant channel 12 that penetrates the valve body 1. The second refrigerant channel 12 is not connected to the first refrigerant channel 11. This design allows the valve body 1 to 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 connected to the outlet of the evaporator channel 93a or the outlet of the second heat exchange channel 95b.

[0061] The second refrigerant inlet 1c and the second refrigerant outlet 1d are preferably located 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 located on the same side of the valve body 1, and the first refrigerant outlet 1b and the second refrigerant inlet 1c are preferably located on the same side of the valve body 1. In embodiments not shown, the second refrigerant inlet 1c and the second refrigerant outlet 1d may also be located on the same side of the valve body 1, or the second refrigerant inlet 1c and the second refrigerant outlet 1d may also be located on adjacent sides of the valve body 1.

[0062] To enable the refrigerant sensor 31 to detect the refrigerant within the second refrigerant channel 12, the valve body 1 preferably has a second mounting cavity 16 on the side without the second refrigerant inlet 1c and the second refrigerant outlet 1d. The second mounting cavity 16 extends from the outer surface of the valve body 1 towards the interior of the valve body 1 and communicates with the second refrigerant channel 12. The refrigerant sensor 31 is inserted into the second mounting cavity 16, and at least a portion of the refrigerant sensor 31 is located within the second refrigerant channel 12 to detect the refrigerant within the second refrigerant channel 12.

[0063] The refrigerant sensor 31 is preferably a temperature and pressure sensor, integrating both temperature and pressure detection functions. Structurally, the refrigerant sensor 31 has a temperature detection section 31a and a pressure detection section 31b arranged side by side. Figure 4 , 25 As shown, the temperature detection unit 31a and the pressure detection unit 31b are arranged one after the other in the direction of refrigerant flow, with the temperature detection unit 31a preferably located upstream of the pressure detection unit 31b. The temperature detection unit 31a and the pressure detection unit 31b are preferably aligned with the centerline of the second refrigerant channel 12. This design helps to reduce the length of the refrigerant sensor 31 in the direction of insertion into the valve body 1.

[0064] like Figure 3 , 5 As shown, in terms of orientation, the refrigerant sensor 31 and the valve assembly 2 can be respectively disposed on different sides of the valve body 1, for example, on adjacent sides of the valve body 1. Correspondingly, the first mounting cavity 15 and the second mounting cavity 16 are respectively opened on different sides of the valve body 1. In an embodiment not shown, the refrigerant sensor 31 and the valve assembly 2 can also be disposed on the same side of the valve body 1, and correspondingly, the first mounting cavity 15 and the second mounting cavity 16 are opened on the same side of the valve body 1.

[0065] Continue to refer to Figure 3 and Figure 5 The main control board 4 is electrically connected to the valve assembly 2 and the refrigerant sensor 31, respectively. The refrigerant sensor 31 detects the refrigerant in the second refrigerant channel 12 to generate detection signals, such as temperature and pressure signals; the main control board 4 can receive these detection signals. The main control board 4 is also configured to send a drive signal 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 channel 11. More specifically, the main control board 4 also has a microprocessor that can process the detection signals generated by the refrigerant sensor 31 and generate the aforementioned drive signals.

[0066] Electrical connections can be achieved using pins or flexible conductive components, such as flexible flat cables. Electrical connections include detachable grounding connections. Figure 3 and Figure 5As shown, the electronic expansion valves 92 and 94 include a flexible conductive element 41; the flexible conductive element 41 is detachably electrically connected to the refrigerant sensor 31 and the main control board 4. For example, one end of the flexible conductive element 41 is configured to snap-fit ​​and electrically connect to the main control board 4, and the other end is soldered to the refrigerant sensor 31. Figure 3 and Figure 5 In the embodiment shown, the valve assembly 2 is electrically connected to the main control board 4 via a pin.

[0067] like Figure 3 , 5 As shown, in terms of orientation, the main control board 4 and the refrigerant sensor 31 can be located on the same side of the valve body 1. Figure 5 In this configuration, the main control board 4 and the refrigerant sensor 31 are arranged side by side and are detachably electrically connected via a flexible conductive component 41. This side-by-side arrangement of the main control board 4 and the refrigerant sensor 31 contributes to a more compact structure for the electronic expansion valves 92 and 94.

[0068] In embodiments not shown, the main control board 4 and the refrigerant sensor 31 may also be located on different sides of the valve body 1, for example, the main control board 4 and the refrigerant sensor 31 may be located on adjacent sides of the valve body 1.

[0069] Continue to refer to 2A. Figure 2B , Figure 3 , Figure 5 and Figure 6 The main control board 4 is housed 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 firmly onto the housing assembly 5. This design helps to improve the stability of the refrigerant sensor 31 installation and makes the electronic expansion valves 92 and 94 compact.

[0070] Continue to refer to Figure 5 The housing assembly 5 includes a main housing 51; the main housing 51 has a main control chamber 51a; the main control board 4 is disposed within the main control chamber 51a. The valve assembly 2 and the main control board 4 are located on different sides of the valve body 1. This design allows the main control chamber 51a to have a larger extension space on the side of the valve body 1 where the main control board 4 is located, thus enabling the main control chamber 51a to accommodate a larger main control board 4; the larger main control board 4 can integrate more electronic components, which is very beneficial for realizing intelligent control of the electronic expansion valve.

[0071] Continue to refer to Figure 5 More specifically, valve assembly 2 and main control board 4 are located on adjacent sides of valve body 1. This helps to improve the compactness of electronic expansion valves 92 and 94. Preferably, valve assembly 2 and main control board 4 are located on adjacent sides of valve body 1 where there are no refrigerant inlets and outlets.

[0072] In an embodiment not shown, the valve assembly 2, the main control board 4, and the refrigerant sensor 31 may be located on three different sides of the valve body 1 where there are no refrigerant inlets and outlets.

[0073] Electronic expansion valves 92 and 94 have installation positions, which can be the orientation of the electronic expansion valves 92 and 94 after they are installed on the vehicle. This installation position is also the position of the electronic expansion valves 92 and 94 when they are in operation. To prevent refrigerant and its contained lubricating oil and impurities from accumulating in the valve assembly 2, for the electronic expansion valves 92 and 94 in their installation positions, the valve assembly 2 is located on the upper side of the valve body 1 with reference to the vertical direction. This design allows the refrigerant that enters the housing 225 of the valve assembly 2 during the operation of the electronic expansion valves 92 and 94 to flow out of the housing 225 under gravity after the electronic expansion valves 92 and 94 stop operating, thus preventing refrigerant from accumulating inside the valve assembly 2. In this 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°.

[0074] Continue to refer to Figure 3 , 4 Electronic expansion valves 92 and 94, 5 and 7, also include valve assembly sensors 32 and 33. Valve assembly sensors 32 and 33 are electrically connected to the main control board 4. Valve assembly sensors 32 and 33 are used to detect valve assembly 2. Valve assembly sensors 32 and 33 are located within the main control chamber 51a. Any sensor capable of detecting various parts of the valve assembly and generating feedback signals falls within the scope of valve assembly sensors 32 and 33. For example, valve assembly sensors 32 and 33 can be Hall effect sensors that detect changes in the magnetic field of the permanent magnet in rotor assembly 223, or position sensors that detect the movement of valve core 222 along the axis of valve assembly 2. Valve assembly sensors 32 and 33 can detect abnormal operating states of valve assembly 2, such as loss of synchronization or stall.

[0075] The Hall sensor can sense changes in the magnetic field of the permanent magnet in the rotor assembly 223 and generate a feedback signal. This feedback signal is transmitted to the microprocessor on the main control board 4.

[0076] like Figure 6 , 7 As shown, the refrigerant sensor 31, the main housing 51, and the valve body 1 are stacked and connected as a single unit 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. 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.

[0077] Continue to refer to Figure 6The refrigerant sensor 31, the main housing 51, and the valve body 1, which are stacked together, are connected as a whole by a sensor connector 71. The sensor connector 71 can be a screw. The sensor connector 71 passes through at least one of the main housing 51 and the refrigerant sensor 31 and is fixedly connected to the valve body 1.

[0078] exist Figure 6 In the embodiment shown, the main housing 51 is sandwiched between the refrigerant sensor 31 and the valve body 1, and the sensor connector 71 passes through the refrigerant sensor 31 and the main housing 51.

[0079] In an embodiment not shown, the portion of the refrigerant sensor 31 located inside the valve body 1 is threadedly connected to the valve body 1, and the portion of the refrigerant sensor 31 located outside the valve body 1 presses the main housing 51 against the valve body 1.

[0080] refer to Figure 3 , 4 5, 8A, 8B, the housing assembly 5 also includes a main cover 52; the main housing 51 has a main opening 51b, which communicates with the main control chamber 51a; the main opening 51b can be oriented away from the valve body 1 and allows the main control board 4 to enter the main control chamber 51a; the main cover 52 is used to cover the main housing 51 to close the main opening 51b.

[0081] Continue to refer to Figure 3 , 4 5, 8A, 8B, the main seal 81 is arranged circumferentially along 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 may be provided with a groove to accommodate the main seal 81.

[0082] Continue to refer to Figure 3 , 4 5, 8A, 8B, The main housing 51 has a sensor hole 51c, which communicates with the main control cavity 51a; a refrigerant sensor 31 passes through the sensor hole 51c; wherein, a portion of the refrigerant sensor 31 is located inside the main control cavity 51a and is electrically connected to the main control board 4; another portion of the refrigerant sensor 31 is located outside the main control cavity 51a and is used to detect the refrigerant in the second refrigerant channel 12. The portion of the refrigerant sensor 31 located inside the main control cavity 51a is pressed against the main housing 51.

[0083] like Figure 3 , 6 As shown, the electronic expansion valves 92 and 94 also include a sensor seal 82, which is arranged circumferentially along 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.

[0084] To achieve the fixation of valve assembly 2, such as Figure 3 , 4 As shown in Figures 7 and 8, the electronic expansion valves 92 and 94 also include a valve assembly connector 72. The valve assembly connector 72 is configured to be inserted into the valve body 1 from the side of the valve body 1 where the valve assembly 2 is not located, and to engage with a portion of the valve assembly 2 located within the valve body 1, thereby fixing the valve assembly 2 onto the valve body 1. This design makes it easy to assemble the valve assembly 2 onto the valve body 1, and the valve assembly connector 72 does not interfere with the valve assembly 2 during insertion into the valve body 1.

[0085] More specifically, the valve assembly connector 72 is configured to insert into the valve body 1 from one side of the main control board 4. The valve assembly connector 72 may be a pin.

[0086] like Figure 4 , 5 As shown in 7, 8A, and 8B, the main housing 51 has a drive cavity 51d and a valve assembly hole 51e, with the valve assembly hole 51e communicating with the drive cavity 51d; the valve assembly 2 passes through the valve assembly hole 51e; wherein, a part of the valve assembly 2 is located inside the drive cavity 51d and is electrically connected to the main control board 4; the other 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 channel 11.

[0087] Continue to refer to Figure 4 , 5 The coil assembly 21 is fixed in the drive cavity 51d as an insert through injection molding. The valve core assembly 22 is inserted into the drive cavity 51d through the valve assembly hole 51e and is positioned in the middle of the coil assembly 21. The coil assembly 21 is electrically connected to the main control board 4 in the main control cavity 51a through a pin, which, during the injection molding process, acts as an insert penetrating the partition wall between the drive cavity 51d and the main control cavity 51a. The valve seat 221 and the valve core 222 are located outside the drive cavity 51d.

[0088] like Figure 3 , 4 As shown in Figure 5, the valve assembly seal 83 is arranged circumferentially along the valve assembly bore 51e; the valve assembly seal 83 is clamped between the valve assembly 2 and the main housing 51 to seal the valve assembly bore 51e. The valve assembly seal 83 is pressed radially against the cover 225 of the valve assembly 2 by the main housing 51. More specifically, the valve assembly seal 83 is pressed at the joint between the cover 225 and the connecting seat 224.

[0089] like Figure 7As shown, the main control chamber 51a has a first cavity 51a-1, a second cavity 51a-2, and a corner cavity 51a-3; the first cavity 51a-1 and the second cavity 51a-2 are located on different sides of the valve body 1, respectively; the corner cavity 51a-3 extends from the side of the valve body 1 where the first cavity 51a-1 is located, around a corner of the valve body 1, to the side of the valve body 1 where the second cavity 51a-2 is located; wherein, a portion of the main control board 4 is located in the first cavity 51a-1, and another portion is located in the corner cavity 51a-3. This design increases the volume of the main control chamber 51a, allowing the main control board 4 to have greater extension space. A corner of the valve body 1 refers to the intersection of the outer surfaces of two adjacent sides of the valve body 1.

[0090] In addition, the valve assembly 2 is electrically connected to the portion of the main control board 4 located within the corner cavity 51a-3. This design allows for a shorter pin length to be used to achieve this electrical connection.

[0091] The second cavity 51a-2 is located on one side of the valve body 1 where the valve assembly 2 is installed; valve assembly sensors 32 and 33 are disposed in the second cavity 51a-2. The valve assembly sensors 32 and 33 are electrically connected to the portion of the main control board 4 located within the corner cavity 51a-3. More specifically, refer to... Figure 7 Valve assembly sensors 32 and 33 are mounted on and electrically connected to connecting circuit boards 401 and 402. Connecting circuit boards 401 and 402 are located in the main control cavity 51a and fixedly connected to the main housing 51. Connecting circuit boards 401 and 402 are electrically connected to the main control board 4 via pins.

[0092] like Figure 5 As shown in Figure 7, the main housing 51 extends from one side of the valve body 1, around a corner of the valve body 1, to the other side of the valve body 1. More specifically, the main housing 51 extends from the side of the valve body 1 where the main electronic control board 4 is located, around a corner of the valve body 1, to the side of the valve body 1 where the valve assembly 2 is located. This design improves the overall integrity of the main housing 51 and facilitates the assembly and manufacture of the electronic expansion valves 92 and 94.

[0093] like Figure 3 , 5 As shown in Figures 7 and 8, the electronic expansion valves 92 and 94 also include a housing connector 73; the housing connector 73 connects the main housing 51 and the valve body 1; wherein, one end of the housing connector 73 is connected to the main housing 51 on the side of the valve body 1 where the valve assembly 2 is located, and the other end of the housing connector 73 is connected to the valve body 1 on the opposite side of the valve body 1 where the main electronic control board 4 is located. The housing connector 73 improves the stability of the main housing 51 connected to the valve body 1.

[0094] like Figure 3As shown in Figures 8, 8, 9A to 9D, the valve body 1 has a first flat portion 13 and a first protrusion 14 on one side where the refrigerant sensor 31 is installed; wherein, the first protrusion 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 configured to be inserted into the first protrusion 14. A second mounting cavity 16 is formed on the first protrusion 14. This design ensures that the first protrusion 14 has sufficient thickness to mate with the connector that fixes the refrigerant sensor 31. The first protrusion 14 has a connecting hole 14a for connecting the refrigerant sensor 31, and the connecting hole 14a is used for insertion and mating with the connector that fixes the refrigerant sensor 31.

[0095] The main housing 51 has a second flat portion 511 and a second protrusion 512 on the side near the valve body 1; wherein, the second protrusion 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 disposed opposite to the first protrusion 14; the second protrusion 512 is disposed opposite to the first flat portion 13. This design helps to increase the volume of the main control cavity 51a.

[0096] like Figure 5 and Figure 8B As shown, the main control board 4 can be fixed to the main housing 51. For example, the four corners of the main control board 4 can be fixed to the main housing 51 with screws. This design helps to increase the stability of the main control board 4 when installed in the main control cavity 51a. Figure 8B The post hole 513 on the main housing 51 for fixing the main electrical control board 4 is shown.

[0097] like Figure 3 , 4 As shown in Figures 5 and 6, the electronic expansion valves 92 and 94 also include a first valve body seal 801, a second valve body seal 802, and a third valve body seal 803.

[0098] The first valve body seal 801 is disposed in the second mounting cavity 16 of the valve body 1 and surrounds the refrigerant sensor 31; the first valve body seal 801 is pressed together by the valve body 1 and the refrigerant sensor 31.

[0099] The second valve body seal 802 and the third valve body seal 803 are respectively disposed in the first mounting cavity 15 and are disposed around the valve assembly 2; the second valve body seal 802 and the third valve body seal 803 are respectively pressed by the valve body 1 and the valve assembly 2.

[0100] More specifically, the second valve body seal 802 and the third valve body seal 803 are respectively disposed around the valve seat 221 of the valve assembly 2. The valve hole 221a of the valve seat 221 is located axially between the second valve body seal 802 and the third valve body seal 803 of the valve assembly 2. This ensures that all the refrigerant in the first refrigerant passage 11 can pass through the valve hole 221a.

[0101] Figures 10A to 10D as well as Figure 11 , 12 Figures 13, 14A, 14B, 15A, and 15B illustrate a second embodiment of the electronic expansion valves 92 and 94 of the present invention. Components identical to those in the first embodiment are referred to by the same reference numerals, and the parts of the technical solution identical to those in the first embodiment will not be described again.

[0102] refer to Figures 10A to 10D as well as Figure 11 , 12 13, 15A, 15B, the housing assembly 5 also includes a sub-housing 53; the sub-housing 53 has a drive chamber 53a and a valve assembly hole 53b; the valve assembly hole 53b communicates with the drive chamber 53a; the valve assembly 2 passes through the valve assembly hole 53b; wherein, a part of the valve assembly 2 is located inside the drive chamber 53a and is electrically connected to the main control board 4; the other part of the valve assembly 2 is located outside the drive chamber 53a and is used to throttle the refrigerant in the first refrigerant passage 11; the sub-housing 53 is detachably connected to the main housing 51. This design makes the electronic expansion valves 92 and 94 highly modular, making them easy to disassemble.

[0103] Continue to refer to Figure 12 , 13 The coil assembly 21 is fixed in the drive cavity 53a as an insert via injection molding. The valve core assembly 22 is inserted into the drive cavity 53a through the valve assembly hole 53b and is positioned in the middle of the coil assembly 21. The coil assembly 21 is electrically connected to the main control board 4 in the main control cavity 51a via a flexible conductive element 42. The valve seat 221 and the valve core 222 are located outside the drive cavity 53a.

[0104] like Figure 11 , 12 As shown in Figure 13, the valve assembly seal 84 is arranged circumferentially along the valve assembly bore 53b; the valve assembly seal 84 is clamped between the valve assembly 2 and the sub-housing 53 to seal the valve assembly bore 53b. The valve assembly seal 84 is pressed radially against the cover 225 of the valve assembly 2 by the sub-housing 53. More specifically, the valve assembly seal 84 is pressed at the joint between the cover 225 and the connecting seat 224.

[0105] like Figure 11 , 12As shown in Figures 13, 14A, 14B, 15A, and 15B, the secondary housing 53 also has a secondary control cavity 53c and a secondary connection opening 53d; the secondary connection opening 53d communicates with the secondary control cavity 53c; the main housing 51 has a main connection opening 51f; the main connection opening 51f communicates with the main control cavity 51a; the secondary connection opening 53d is configured to communicate with the main connection opening 51f, thereby connecting the secondary control cavity 53c with the main control cavity 51a. A flexible conductive element 42 passes through the main connection opening 51f and the secondary connection opening 53d to detachably electrically connect the main control board 4 and the valve assembly 2. The flexible conductive element 42 can be a flexible flat cable. One end of the flexible conductive element 42 is configured to snap-fit ​​and electrically connect with the main control board 4, and the other end is welded to the valve assembly 2.

[0106] Continue to refer to Figure 12 , 13 15A, the secondary control chamber 53c and the main control chamber 51a are located on different sides of the valve body 1, for example, on adjacent sides; wherein, the main control chamber 51a is located on the side of the valve body 1 where the main electric control board 4 is installed. The secondary control chamber 53c is located on the side of the valve body 1 where the valve assembly 2 is installed.

[0107] The housing assembly 5 also includes a secondary cover 54; the secondary housing 53 has a secondary opening 53e, which communicates with the secondary control cavity 53c; the secondary cover 54 is used to cover the secondary housing 53 to close the secondary opening 53e. The secondary cover 54 and the secondary housing 53 can be welded.

[0108] The electronic expansion valves 92 and 94 also include a connecting seal 85; the connecting seal 85 is arranged circumferentially along the secondary connecting opening 53d and the main connecting opening 51f; the connecting seal 85 is clamped between the main housing 51 and the secondary housing 53 to seal the secondary connecting opening 53d and the main connecting opening 51f.

[0109] Valve assembly sensors 32 and 33 are disposed within the secondary control chamber 53c. A flexible conductive element 43 extends through the main connection opening 51f and the secondary connection opening 53d to detachably electrically connect the main control board 4 and the valve assembly sensors 32 and 33. More specifically, refer to... Figure 13 Valve assembly sensors 32 and 33 are mounted on and electrically connected to connecting circuit boards 404 and 405. Connecting circuit boards 404 and 405 are located in the secondary control cavity 53c and fixedly connected to the main housing 51. Connecting circuit boards 404 and 405 are electrically connected to the main control board 4 through a flexible conductive element 43.

[0110] The flexible conductive component 43 can be a flexible flat cable. One end of the flexible conductive component 43 is configured to snap-fit ​​and electrically connect to the main control board 4, and the other end is soldered to the connecting circuit boards 404 and 405.

[0111] like 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.

[0112] 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.

[0113] 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 to the outside world.

[0114] Figures 16A to 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.

[0115] like Figures 16A to 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.

[0116] The portion of the refrigerant sensor 31 located within the secondary control chamber 55a is pressed against the secondary housing 55.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] like Figure 17 , 20As shown, the electronic expansion valves 92 and 94 also include a sensor connector 76; the stacked refrigerant sensor 31, sub-housing 55, and valve body 1 are connected as a whole by the sensor connector 76. The sensor connector 76 can be a screw. The sensor connector 76 passes through at least one of the sub-housing 55 and the refrigerant sensor 31 and is fixedly connected to the valve body 1.

[0123] exist Figure 20 In the embodiment shown, the sub-housing 55 is sandwiched between the refrigerant sensor 31 and the valve body 1, and the sensor connector 76 passes through the refrigerant sensor 31 and the sub-housing 55.

[0124] In an embodiment not shown, the portion of the refrigerant sensor 31 located inside the valve body 1 is threadedly connected to the valve body 1, and the portion of the refrigerant sensor 31 located outside the valve body presses the sub-housing 55 against the valve body 1.

[0125] like Figure 17 , 20 As shown, the electronic expansion valves 92 and 94 also include a sensor seal 87; the sensor seal 87 is arranged circumferentially along the sensor hole 55b; the sensor seal 87 is clamped between the sub-housing 55 and the valve body 1 to seal the sensor hole 55b.

[0126] The electronic expansion valves 92 and 94 also include a housing assembly connector 77; the secondary housing 55 is detachably connected to the main housing 51 via the housing assembly connector 77. The housing assembly connector 77 may be a screw.

[0127] To achieve the fixation of valve assembly 2 to valve body 1, those skilled in the art, based on the description of this invention, can further deduce that: an electronic expansion valve includes: a 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; and electronic expansion valves 92 and 94 further include: a valve assembly connector 72; the valve assembly connector 72 is configured to be inserted into the valve body 1 from the side of the valve body 1 where the valve assembly 2 is not located, and to engage with a portion of the valve assembly 2 located within the valve body 1 for limiting and positioning, thereby fixing the valve assembly 2 to the valve body 1. This solution ensures that the valve assembly 2 does not interfere with the valve assembly connector 72 during the fixing process on the valve body 1, and the fixing method is also relatively simple.

[0128] The valve assembly connector 72 is configured to be inserted into the valve body 1 from the adjacent side of the valve assembly 2 on the side of the valve body 1.

[0129] The valve body 1 has a first mounting cavity 15 and a limiting hole 1e; the first mounting cavity 15 is opened on one side of the valve body 1, and the limiting 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 limiting hole 1e allows the valve assembly connector 72 to be inserted; the limiting hole 1e and the first mounting cavity 15 communicate inside the valve body 1 so that the valve assembly connector 72 can be located in the first mounting cavity 15 after being inserted into the limiting hole 1e, thereby limiting and cooperating with the portion of the valve assembly 2 located in the first mounting cavity 15.

[0130] Valve assembly 2 has a recess 221b for limiting engagement with valve assembly connector 72.

[0131] The valve assembly connector 72 is held by the inner wall of the limiting hole 1e and the recess 221b.

[0132] There are two valve assembly connectors 72, which are respectively matched with the two sides of the valve assembly 2 for limiting.

[0133] The valve seat 221 of valve assembly 2 is in a limiting fit with the valve assembly connector 72.

[0134] The two valve assembly connectors 72 are symmetrically arranged about the valve assembly 2.

[0135] To detect the operating status of valve assembly 2, those skilled in the art, based on the description of this invention, can further deduce that an electronic expansion valve includes: a valve body 1 having 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; a valve assembly 2 for throttling the refrigerant in the first refrigerant channel 11; and a main control board 4 electrically connected to the valve assembly 2. The electronic expansion valves 92 and 94 further include: valve assembly sensors 32 and 33; the valve assembly sensors 32 and 33 are electrically connected to the main control board 4; the valve assembly sensors 32 and 33 are used to detect the valve assembly 2; and the valve assembly 2 and the main control board 4 are located on different sides of the valve body 1. This design allows the operating status of the valve assembly 2 to be detected. The valve assembly sensors 32 and 33 can be, but are not limited to, Hall effect sensors.

[0136] The electronic expansion valves 92 and 94 also include a housing assembly 5, which includes a main housing 51; the main housing 51 has a main control chamber 51a; the main control board 4 is disposed in the main control chamber 51a; and the valve assembly sensors 32 and 33 are disposed in the main control chamber 51a.

[0137] The valve assembly sensor 32 is disposed along the axis of the valve assembly 2 at the end of the valve assembly 2 away from the valve body 1. In this embodiment, the valve assembly sensor 32 is an angle-type Hall sensor.

[0138] Valve assembly sensor 33 is disposed on the outer radial side of valve assembly 2. In this embodiment, valve assembly sensor 32 is a switch-type Hall sensor.

[0139] The main control chamber 51a has a first chamber 51a-1, a second chamber 51a-2, and a corner chamber 51a-3; the first chamber 51a-1 and the second chamber 51a-2 are located on different sides of the valve body 1; the corner chamber 51a-3 extends from the side of the valve body 1 where the first chamber 51a-1 is located, around a corner of the valve body 1, to the side of the valve body 1 where the second chamber 51a-2 is located; wherein, a part of the main electronic control board 4 is located in the first chamber 51a-1, and the other part is located in the corner chamber 51a-3.

[0140] Valve assembly sensors 32 and 33 are disposed in the second cavity 51a-2 and are electrically connected to the portion of the main control board 4 located in the corner cavity 51a-3.

[0141] The second cavity 51a-2 is located on the side of the valve body 1 where the valve assembly 2 is installed, and the first cavity 51a-1 is located on the side of the valve body 1 where the main electric control board 4 is installed.

[0142] The electronic expansion valves 92 and 94 also include a housing assembly 5, which includes a main housing 51 and a secondary housing 53. The secondary housing 53 is detachably connected to the main housing 51. The main housing 51 has a main control chamber 51a. The main electronic control board 4 is disposed in the main control chamber 51a. The secondary housing 53 has a secondary control chamber 53c, and the valve assembly sensors 32 and 33 are disposed in the secondary control chamber 53c.

[0143] The secondary housing 53 also has a secondary connection opening 53d; the secondary connection opening 53d communicates with the secondary control cavity 53c; the main housing 51 has a main connection opening 51f; the main connection opening 51f communicates with the main control cavity 51a; the secondary connection opening 53d is configured to communicate with the main connection opening 51f, thereby enabling the secondary control cavity 53c to communicate with the main control cavity 51a; the flexible conductive element 43 passes through the main connection opening 51f and the secondary connection opening 53d to detachably electrically connect the main control board 4 and the valve assembly sensors 32, 33.

[0144] The secondary control chamber 53c is located on one side of the valve assembly 2 of the valve body 1.

[0145] To achieve the fixation of the refrigerant sensor 31 on the electronic expansion valves 92 and 94, those skilled in the art, based on the description of this invention, can also deduce that: an electronic expansion valve includes: a 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 channel 11 is formed between the first refrigerant inlet 1a and the first refrigerant outlet 1b, and a second refrigerant channel 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 channel 11; a refrigerant sensor 31 for detecting the refrigerant in the second refrigerant channel 12; and a main control board 4 electrically connected to the valve assembly 2 and the refrigerant sensor 31, respectively; the electronic expansion valves 92 and 94 further include: a housing assembly 5, including a main housing 51; the main housing 51 having a main control cavity 51a; the main control board 4 being disposed within the main control cavity 51a; and the refrigerant sensor 31 being pressed against the housing assembly 5. This solution can improve the stability of the refrigerant sensor 31 when installed on the electronic expansion valves 92 and 94.

[0146] The refrigerant sensor 31, the main housing 51, and the valve body 1 are stacked and connected as a whole 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.

[0147] The electronic expansion valves 92 and 94 also include a sensor connector 71; the refrigerant sensor 31, the main housing 51 and the valve body 1, which are stacked together, are connected as one unit through the sensor connector 71.

[0148] The portion of the refrigerant sensor 31 located within the main control cavity 51a is pressed against the main housing 51.

[0149] The housing assembly 5 also includes a sub-housing 55; the sub-housing 55 is detachably connected to the main housing 51; the refrigerant sensor 31 is pressed against the sub-housing 55.

[0150] The refrigerant sensor 31, the sub-housing 55, and the valve body 1 are stacked and connected as a whole 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.

[0151] The electronic expansion valves 92 and 94 also include a sensor connector 76; the refrigerant sensor 31, the sub-housing 55 and the valve body 1, which are stacked together, are connected as one unit through the sensor connector 76.

[0152] The sub-housing 55 has a sub-control cavity 55a and a sensor hole 55b; the sensor hole 55b communicates with the sub-control cavity 55a; the refrigerant sensor 31 passes through the sensor hole 55b; wherein, a part of the refrigerant sensor 31 is located inside the sub-control cavity 55a and is electrically connected to the main control board 4; the other part of the refrigerant sensor 31 is located outside the sub-control cavity 55a and is used to detect the refrigerant in the second refrigerant channel 12.

[0153] The portion of the refrigerant sensor 31 located within the secondary control chamber 55a is pressed against the secondary housing 55.

[0154] like Figure 23 As shown, the pin of the refrigerant sensor 31 passes through the sensor hole 51c and extends into the main control cavity 51a to be connected to the main control board 4. The portion of the refrigerant sensor 31 located outside the main control cavity 51a is clamped between the main housing 51 and the valve body 1.

[0155] exist Figure 23 In this configuration, the portion of the refrigerant sensor 31 located outside the main control chamber 51a is pressed against the main housing 51. The main housing 51 has a main opening 51b facing away from the valve body 1. The main circuit board 4 is inserted into the main control chamber 51a through the main opening 51b.

[0156] like Figure 24 As shown, the main housing 51 has a main opening 51b facing the valve body 1. The main circuit board 4 is disposed between the main housing 51 and the valve body 1, located in the main control cavity 51a. The refrigerant sensor 31 is clamped between the main housing 51 and the valve body 1. The main circuit board 4 is inserted into the main housing 51 through this opening.

[0157] Those skilled in the art can also derive a method for manufacturing an electronic expansion valve based on the description of the present invention, which includes the step of pressing a refrigerant sensor 31 onto a housing assembly 5.

[0158] More specifically, the method of manufacturing the electronic expansion valve includes the step of pressing the refrigerant sensor 31 onto the main housing 51 or the sub-housing 55.

[0159] More specifically, the manufacturing method of the electronic expansion valve includes the steps 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 into a whole along the stacking direction.

[0160] More specifically, the manufacturing method of the electronic expansion valve includes the steps 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 into a whole along the stacking direction.

[0161] More specifically, the method of manufacturing the electronic expansion valve includes the step of connecting the refrigerant sensor 31, the main housing 51 and the valve body 1 together in the stacking direction using a sensor connector 71.

[0162] More specifically, the method of manufacturing the electronic expansion valve includes the step of connecting the refrigerant sensor 31, the sub-housing 55 and the valve body 1 together in the stacking direction using a sensor connector 76.

[0163] Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. An electronic expansion valve, comprising: The valve body (1) has 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 channel (11) is formed between the first refrigerant inlet (1a) and the first refrigerant outlet (1b), and a second refrigerant channel (12) is formed between the second refrigerant inlet (1c) and the second refrigerant outlet (1d). A valve assembly (2) is used to throttle the refrigerant in the first refrigerant passage (11); the valve assembly (2) includes a coil assembly (21). A refrigerant sensor (31) is used to detect the refrigerant in the second refrigerant channel (12); The main control board (4) is electrically connected to the coil assembly (21) of the valve assembly (2) and the refrigerant sensor (31), respectively; The electronic expansion valve (92, 94) is characterized in that it further includes: The housing assembly (5) includes a main housing (51); the main housing (51) has a main control cavity (51a); the main control board (4) is disposed within the main control cavity (51a); the refrigerant sensor (31) is pressed against the housing assembly (5). The refrigerant sensor (31), the main housing (51) and the valve body (1) are stacked and connected as a whole along the stacking direction; wherein, the main housing (51) is clamped between the valve body (1) and the refrigerant sensor (31); The electronic expansion valve (92, 94) also includes a sensor connector (71); the refrigerant sensor (31), the main housing (51) and the valve body (1) stacked together are connected as one unit through the sensor connector (71); The main housing (51) has a sensor hole (51c), which is connected to the main control cavity (51a); the refrigerant sensor (31) passes through the sensor hole (51c). A portion of the refrigerant sensor (31) is located inside the main control cavity (51a) and is electrically connected to the main control board (4); another portion of the refrigerant sensor (31) is located outside the main control cavity (51a) and is used to detect the refrigerant in the second refrigerant channel (12). The portion of the refrigerant sensor (31) located within the main control cavity (51a) is pressed against the main housing (51).

2. A thermal management component, comprising a heat exchanger (95) having a first heat exchange channel (95a) and a second heat exchange channel (95b); the first heat exchange channel (95a) and the second heat exchange channel (95b) are not in communication with each other, characterized in that, The thermal management assembly further includes an electronic expansion valve (94) as claimed in claim 1; the electronic expansion valve (94) is mounted on the heat exchanger (95), wherein the electronic expansion valve (94) is in communication with the first heat exchange channel (95a).

Images