An electronic expansion valve

Abstract

The present invention relates to an electronic expansion valve. The electronic expansion valve includes a connecting circuit board and a circuit board positioning member. The connecting circuit board is electrically connected to a main electric control board and a valve assembly sensor, respectively, thereby electrically connecting the valve assembly sensor to the main electric control board. The circuit board positioning member is used to press the connecting circuit board against a housing assembly, such as a main housing. Because the circuit board positioning member presses the connecting circuit board against the housing assembly, the housing assembly and the circuit board positioning member can clamp the connecting circuit board, thereby enhancing the stability of the connecting circuit board's installation.

Description

Technical Field

[0001] The invention relates to an electronic expansion valve. Background Art

[0002] A traditional air conditioning system consists of four major components: a compressor, an evaporator, a condenser, and a throttling device. Depending on the specific requirements of the air conditioning system, the throttling device may include an expansion valve or a capillary tube. Expansion valves are categorized by their driving principle as thermal expansion valves or electronic expansion valves. Electronic expansion valves are categorized by their driving method as electromagnetically driven or motor-driven.

[0003] Automobile air conditioning systems include the four major components mentioned above. Regarding the throttling device, an expansion valve is typically used in automobile air conditioning systems. Chinese patent application CN101551174A discloses an automobile air conditioning system that uses a thermal expansion valve as a throttling device. In other prior art, electronic expansion valves are also used as throttling devices in automobile air conditioning systems.

[0004] As the automotive industry moves toward electrification, vehicles powered by power batteries are becoming increasingly popular. Power batteries generate heat during charging and discharging, causing the battery temperature to rise. According to the technical solution described in Chinese patent application CN101551174A, maintaining a stable battery temperature can be achieved by installing a refrigerant branch for battery cooling in the vehicle's air conditioning system. This refrigerant branch can be equipped with an electronic expansion valve to throttle the refrigerant.

[0005] The electronic expansion valve in the prior art comprises 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 arranged rationally. Summary of the Invention

[0006] The object of the present invention is to provide an electronic expansion valve, which has the advantage of stable installation of a connected circuit board.

[0007] To achieve the purpose, the electronic expansion valve includes:

[0008] a valve body, the valve body having a first refrigerant inlet and a first refrigerant outlet; wherein a first refrigerant channel is formed between the first refrigerant inlet and the first refrigerant outlet;

[0009] a valve assembly, configured to throttle the refrigerant in the first refrigerant passage;

[0010] a main electric control board, electrically connected to the valve assembly;

[0011] The housing assembly comprises a main housing; the main housing has a main control cavity; the main electric control board is arranged in the main control cavity;

[0012] a valve assembly sensor, the valve assembly sensor being used to detect the valve assembly;

[0013] The electronic expansion valve further includes:

[0014] a connecting circuit board, used for mounting the valve assembly sensor, wherein the connecting circuit board is electrically connected to the main electric control board and the valve assembly sensor, respectively, so that the valve assembly sensor is electrically connected to the main electric control board;

[0015] A circuit board positioning member is used to press the connecting circuit board onto the housing assembly.

[0016] The present invention provides the following positive advantages: Because the circuit board positioning member presses the connecting circuit board against the housing assembly, the stability of the connecting circuit board installation is enhanced. The present invention also provides a thermal management assembly including the electronic expansion valve. The present invention also provides an automotive air conditioning system including the thermal management assembly.

[0017] To improve the electromagnetic compatibility of the electronic expansion valve, those skilled in the art may further derive an electronic expansion valve based on the present disclosure, comprising:

[0018] a valve body, the valve body having a first refrigerant inlet and a first refrigerant outlet; wherein a first refrigerant channel is formed between the first refrigerant inlet and the first refrigerant outlet;

[0019] a valve assembly, configured to throttle the refrigerant in the first refrigerant passage;

[0020] a main electric control board, electrically connected to the valve assembly;

[0021] The housing assembly comprises a main housing; the main housing has a main control cavity; the main electric control board is arranged in the main control cavity;

[0022] Characterized in that, the electronic expansion valve further includes a circuit board positioning member and a conductive connecting member;

[0023] The circuit board positioning member is electrically connected to the ground structure on the main electric control board, and is electrically connected to the valve assembly and / or the valve body;

[0024] The circuit board positioning member is fixedly and electrically connected to the main electric control board via the conductive connector; the conductive connector fixes the main electric control board and the circuit board positioning member to the housing assembly.

[0025] In the above technical solution, the conductive connector has the function of connecting and fixing the circuit board positioning member and the main electronic control board, and also has the function of grounding, thereby reducing the number of parts of the electronic expansion valve and making the structure of the electronic expansion valve simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0027] Figure 1 This is a schematic diagram of a car air conditioning system;

[0028] Figures 2A to 2D is a schematic diagram of an electronic expansion valve in a first embodiment of the present invention;

[0029] Figure 3 is an exploded view of the electronic expansion valve in the first embodiment of the present invention;

[0030] Figure 4 for Figure 2C A cross-sectional view taken along the AA direction, wherein the dotted arrows show the flow path of the refrigerant;

[0031] Figure 5 for Figure 2D Cross-sectional view in the middle BB direction;

[0032] Figure 6 for Figure 2C Cross-sectional view in CC direction;

[0033] Figure 7 for Figure 2D Cross-sectional view in the middle DD direction;

[0034] Figures 8A to 8B is a schematic diagram of the main housing in the first embodiment of the present invention;

[0035] Figures 9A to 9C is a schematic diagram of the valve body;

[0036] Figure 9D is a cross-sectional view of the valve body;

[0037] Figures 10A to 10D is a schematic diagram of an electronic expansion valve in a second embodiment of the present invention;

[0038] Figure 11 is an exploded view of an electronic expansion valve in a second embodiment of the present invention;

[0039] Figure 12 for Figure 10C Cross-sectional view in the EE direction;

[0040] Figure 13 for Figure 10D Cross-sectional view in the FF direction;

[0041] Figures 14A to 14B A schematic diagram of a main housing according to a second embodiment of the present invention;

[0042] Figures 15A to 15B is a schematic diagram of a secondary housing according to a second embodiment of the present invention;

[0043] 16A to 16D are schematic diagrams of an electronic expansion valve according to a third embodiment of the present invention;

[0044] Figure 17 is an exploded view of an electronic expansion valve in a third embodiment of the present invention;

[0045] Figure 18 for Figure 16C Cross-sectional view in the GG direction;

[0046] Figure 19 for Figure 16D Cross-sectional view in the JJ direction;

[0047] Figure 20 for Figure 16C Cross-sectional view in the HH direction;

[0048] Figures 21A to 21B is a schematic diagram of the main housing in a third embodiment of the present invention;

[0049] Figures 22A to 22B is a schematic diagram of a secondary housing in a third embodiment of the present invention;

[0050] FIG23 is a cross-sectional view of the electronic expansion valve, showing the connection relationship between the main housing, the sensor, and the valve body, wherein the opening of the main housing faces away from the valve body;

[0051] FIG24 is a cross-sectional view of the electronic expansion valve, showing the connection relationship between the main housing, the sensor, and the valve body, wherein the opening of the main housing faces the valve body;

[0052] FIG25 is a cross-sectional view of the sensor;

[0053] 26A to 26D is a schematic diagram of an electronic expansion valve in a fourth embodiment of the present invention, wherein Figure 26C and Figure 26D The main cover and the secondary cover are hidden;

[0054] FIG. 27A to FIG. 27B A schematic diagram of the main shell;

[0055] Figure 28A A schematic diagram of the connection between the main housing and the auxiliary housing;

[0056] Figure 28B is a schematic diagram of the auxiliary shell;

[0057] Figure 29 for Figure 26B Cross-sectional view in the KK direction;

[0058] Figure 30 for Figure 26B Cross-sectional view in the MM direction;

[0059] Figure 31 is a cross-sectional view of the electronic expansion valve along the axial direction of the valve assembly;

[0060] Figure 32 is a cross-sectional view of the electronic expansion valve along the radial direction of the valve assembly;

[0061] Figure 33 is a cross-sectional view of the electronic expansion valve, showing the conductive connector fixing the main electronic control board and the circuit board positioning member to the housing assembly;

[0062] Figure 34 is a cross-sectional view of an electronic expansion valve showing a circuit board positioning member;

[0063] Figure 35 This is a schematic diagram showing the connection between the circuit board positioning parts and the grounding parts. DETAILED DESCRIPTION

[0064] The following discloses various different implementation methods or examples of the subject technical solutions. To simplify the disclosure, specific examples of each element and arrangement are described below. Of course, these are only examples and are not intended to limit the scope of protection of the present invention. For example, the distribution of the first feature in the second feature described later in the specification may include an implementation method in which the first and second features are distributed in a directly connected manner, and may also include an implementation method in which additional features are formed between the first and second features, so that the first and second features may not be directly connected. In addition, the contents may repeat the figure marks and / or letters in different examples. This repetition is for brevity and clarity and does not itself represent the relationship between the various implementation methods and / or structures to be discussed. Further, when the first element is described in a manner connected or combined with the second element, the description includes an implementation method in which the first and second elements are directly connected or combined with each other, and also includes an implementation method in which one or more other intervening elements are added to indirectly connect or combine the first and second elements.

[0065] It should be noted that Figure 1 Figures 25 to 26 are only examples and are not drawn to scale. They should not be used to limit the actual scope of protection required by the present invention.

[0066] Figure 1FIG. 1 shows an automotive air conditioning system 900 according to an embodiment of the present invention. 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, and pipes for the flow of refrigerant and coolant. These pipes connect the various components of the automotive air conditioning system 900.

[0067] Evaporator 93 and electronic expansion valve 92 form a thermal management assembly. Electronic expansion valve 92 is mounted on evaporator 93 and is integral with evaporator 93. Evaporator 93 has evaporator passages 93a through which refrigerant flows. Evaporator passages 93a are in communication with electronic expansion valve 92.

[0068] 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 integral with the heat exchanger. 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 connected to each other. Refrigerant flows in the first heat exchange channel 95a, while coolant flows in the second heat exchange channel 95b. The first heat exchange channel 95a is connected to the electronic expansion valve 94, while the second heat exchange channel 95b is connected to the circuit containing the pump 96 and the battery module 97.

[0069] During operation of the automotive air conditioning system 900, heat generated by the battery module 97 is carried away by the coolant and flows into the second heat exchange channel 95b of the heat exchanger 95. After being throttled by the electronic expansion valve 94, the refrigerant flows out of the electronic expansion valve 94 and enters 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.

[0070] After being throttled by electronic expansion valve 92, the refrigerant flows out of the valve and enters evaporator passages 93a at low temperature and pressure. Evaporator 93 allows air to flow through the outside of evaporator passages 93a, absorbing heat from the air and cooling it. The cooled air can be delivered into the vehicle cabin to regulate the thermal and humidity environment within the cabin.

[0071] Figures 2A to 2D as well as Figure 3 、 4 , 5, 6, 7, 8A, 8B show a first embodiment of the electronic expansion valve 92, 94 of the present invention. In this embodiment, the electronic expansion valve 92, 94 includes a valve body 1, a valve assembly 2, a refrigerant sensor 31, a main electric control board 4 and a housing assembly 5.

[0072] refer to Figures 2A to 2D 、 Figure 4 as well as Figures 9A to 9D The valve body 1 is block-shaped and spatially has three sets of opposite sides. Internally, 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 and runs through the valve body 1. The first refrigerant inlet 1a and the first refrigerant outlet 1b are preferably disposed on opposite sides of the valve body 1. In an embodiment not shown, the first refrigerant inlet 1a and the first refrigerant outlet 1b may also be disposed on the same side of the valve body 1, or the first refrigerant inlet 1a and the first refrigerant outlet 1b may also be disposed on adjacent sides of the valve body 1. The first refrigerant outlet 1b is in communication with the inlet of the evaporator passage 93a or the inlet of the first heat exchange passage 95a.

[0073] To enable valve assembly 2 to throttle the refrigerant in first refrigerant passage 11, valve body 1 preferably defines a first mounting cavity 15 on a side that is not provided with first refrigerant inlet 1a and first refrigerant outlet 1b. First mounting cavity 15 extends from the exterior of valve body 1 toward the interior of valve body 1 and communicates with first refrigerant passage 11. Valve assembly 2 is inserted into first mounting cavity 15, with at least a portion of valve assembly 2 positioned within first refrigerant passage 11, thereby throttling the refrigerant in first refrigerant passage 11.

[0074] like Figure 3 、 4 As shown in Figures 5 and 6, the 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 channel 11. The portion of the valve core assembly 22 inserted into the valve body 1 is fixed on the valve body 1. The other end of the valve core assembly 22 is exposed on the outside of the valve body 1. The coil assembly 21 is arranged 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 electrical 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 realize the throttling process of the refrigerant in the first refrigerant channel 11. In an embodiment not shown in the figure, the valve assembly 2 can also be an electromagnetically driven valve assembly.

[0075] The valve core assembly 22 includes an axis along the valve assembly 2 (such as Figure 3The valve seat 221, valve core 222, connecting seat 224, rotor assembly 223 and cover body 225 are assembled together (as shown by the dotted line in FIG). The valve seat 221 has a valve hole 221a. The portion of the valve seat 221 having the valve hole 221a is arranged inside the valve body 1 and is located in the first refrigerant channel 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 body 225 are respectively connected to the connecting seat 224. 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 also includes a transmission assembly that converts the rotation of the permanent magnet into movement along the axis of the valve assembly 2.

[0076] The valve core 222 is slidably mounted within the valve seat 221. The permanent magnet of the rotor assembly 223 is driven by the energized coil assembly 21, which, 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 hole 221a. When the refrigerant in the first refrigerant passage 11 passes through the valve hole 221a with a smaller opening, the refrigerant is throttled.

[0077] To enhance the integration of thermal management components, the valve body 1 further includes a second refrigerant inlet 1c and a second refrigerant outlet 1d. A second refrigerant passage 12 is formed between the second refrigerant inlet 1c and the second refrigerant outlet 1d, extending through the valve body 1. The second refrigerant passage 12 is not connected to the first refrigerant passage 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 communicates with the outlet of the evaporator passage 93a or the outlet of the second heat exchange passage 95b.

[0078] The second refrigerant inlet 1c and the second refrigerant outlet 1d are preferably disposed 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 disposed on the same side of the valve body 1, and the first refrigerant outlet 1b and the second refrigerant inlet 1c are preferably disposed 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 may also be disposed on the same side of the valve body 1, or the second refrigerant inlet 1c and the second refrigerant outlet 1d may also be disposed on adjacent sides of the valve body 1.

[0079] To enable the refrigerant sensor 31 to detect the refrigerant in the second refrigerant passage 12, the valve body 1 preferably defines a second mounting cavity 16 on a side that is not provided with the second refrigerant inlet 1c or the second refrigerant outlet 1d. The second mounting cavity 16 extends from the exterior 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 mounting cavity 16, with at least a portion of the refrigerant sensor 31 positioned within the second refrigerant passage 12 to detect the refrigerant in the second refrigerant passage 12.

[0080] The refrigerant sensor 31 is preferably a temperature and pressure sensor, which integrates temperature detection function and pressure detection function. Structurally, the refrigerant sensor 31 has a temperature detection part 31a and a pressure detection part 31b arranged side by side. Figure 4 As shown in Figures 25 and 26, the temperature sensing portion 31a and the pressure sensing portion 31b are arranged one behind the other in the direction of refrigerant flow, with the temperature sensing portion 31a preferably positioned upstream of the pressure sensing portion 31b. The temperature sensing portion 31a and the pressure sensing portion 31b are preferably aligned with the centerline of the second refrigerant passage 12. This design helps reduce the length of the refrigerant sensor 31 when inserted into the valve body 1.

[0081] like Figure 3 、 5 As shown, in terms of installation orientation, the refrigerant sensor 31 and the valve assembly 2 can be respectively installed on different sides of the valve body 1, for example, on two adjacent sides of the valve body 1. Accordingly, the first installation cavity 15 and the second installation 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 installed on the same side of the valve body 1, and accordingly, the first installation cavity 15 and the second installation cavity 16 are opened on the same side of the valve body 1.

[0082] Continue to refer Figure 3 and Figure 5 The main electrical control board 4 is electrically connected to the valve assembly 2 and the refrigerant sensor 31. The refrigerant sensor 31 detects the refrigerant in the second refrigerant channel 12 and generates detection signals, such as temperature and pressure signals, which the main electrical control board 4 is capable of receiving. The main electrical 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 throttling the refrigerant in the first refrigerant channel 11. More specifically, the main electrical control board 4 also includes a microprocessor that processes the detection signal generated by the refrigerant sensor 31 and generates the aforementioned drive signal.

[0083] The electrical connection can be achieved through pins or soft conductive parts, such as flexible cables. The electrical connection includes detachable electrical connection. Figure 3 and Figure 5As shown, the electronic expansion valves 92 and 94 include a soft conductive member 41; the soft conductive member 41 is detachably electrically connected to the refrigerant sensor 31 and the main electric control board 4. For example, one end of the soft conductive member 41 is configured to be snap-fitted and electrically connected to the main electric control board 4, and the other end is welded to the refrigerant sensor 31. Figure 3 and Figure 5 In the embodiment shown, the valve assembly 2 is electrically connected to the main electric control board 4 via pins.

[0084] like Figure 3 、 5 As shown in FIG, in terms of the setting orientation, the main electric control board 4 and the refrigerant sensor 31 can be set on the same side of the valve body 1. Figure 5 In the embodiment, the main electric control board 4 and the refrigerant sensor 31 are arranged side by side and are detachably electrically connected via a soft conductive member 41. The side-by-side arrangement of the main electric control board 4 and the refrigerant sensor 31 helps to make the structure of the electronic expansion valves 92, 94 more compact.

[0085] In an embodiment not shown, the main electric control board 4 and the refrigerant sensor 31 may also be arranged on different sides of the valve body 1 , for example, the main electric control board 4 and the refrigerant sensor 31 are respectively arranged on adjacent sides of the valve body 1 .

[0086] Continuing with reference to 2A, Figure 2B , Figure 3 , Figure 5 and Figure 6 The main electric 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 against the housing assembly 5. This design helps to improve the stability of the installation of the refrigerant sensor 31 and makes the structure of the electronic expansion valves 92 and 94 compact.

[0087] Continue to refer Figure 5 The housing assembly 5 includes a main housing 51, which defines a main control chamber 51a. The main electrical control board 4 is located within the main control chamber 51a. The valve assembly 2 and the main electrical control board 4 are located on different sides of the valve body 1. This design allows for greater expansion of the main control chamber 51a on the side of the valve body 1 where the main electrical control board 4 is located, allowing it to accommodate a larger main electrical control board 4. A larger main electrical control board 4 can integrate more electronic components, which is beneficial for achieving intelligent control of the electronic expansion valve.

[0088] Continue to refer Figure 5 More specifically, the valve assembly 2 and the main electronic control board 4 are located on two adjacent sides of the valve body 1. This helps improve the compactness of the electronic expansion valves 92, 94. Preferably, the valve assembly 2 and the main electronic control board 4 are located on two adjacent sides of the valve body 1 that do not have a refrigerant inlet or outlet.

[0089] In an embodiment not shown in the figures, the valve assembly 2 , the main electric control board 4 and the refrigerant sensor 31 may be respectively located on three different sides of the valve body 1 where no refrigerant inlet and outlet are provided.

[0090] The electronic expansion valves 92 and 94 have an installation position, which can be the orientation of the electronic expansion valves 92 and 94 after they are installed in the vehicle. This installation position is also the position of the electronic expansion valves 92 and 94 when they are in operation. To prevent the refrigerant and the lubricating oil and impurities it contains from accumulating in the valve assembly 2, for the electronic expansion valves 92 and 94 in the installation position, the valve assembly 2 is located on the upper side of the valve body 1 with respect 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 the action of gravity after the electronic expansion valves 92 and 94 stop working, thereby preventing the refrigerant from being stored 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°.

[0091] Continue to refer Figure 3 、 4 , 5, 7, the electronic expansion valves 92, 94 also include valve assembly sensors 32, 33; the valve assembly sensors 32, 33 are electrically connected to the main electronic control board 4; the valve assembly sensors 32, 33 are used to detect the valve assembly 2. The valve assembly sensors 32, 33 are arranged in the main control chamber 51a. As long as it is a sensor that can detect various parts of the valve assembly and generate feedback signals, it falls within the scope of the valve assembly sensors 32, 33. For example, the valve assembly sensors 32, 33 can be Hall sensors that detect changes in the magnetic field of the permanent magnet of the rotor assembly 223, or they can be position sensors that detect the movement of the valve core 222 along the axis of the valve assembly 2. The valve assembly sensors 32, 33 can detect abnormal operating conditions of the valve assembly 2, such as loss of step or stall.

[0092] The Hall sensor can sense the magnetic field changes of the permanent magnets of the rotor assembly 223 and generate a feedback signal which is transmitted to the microprocessor of the main electric control board 4 .

[0093] like Figure 6 、 7 As shown, the refrigerant sensor 31, the main housing 51, and the valve body 1 are stacked and connected together in the stacking direction. 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 reduce the number of assembly steps for the electronic expansion valves 92 and 94 and makes the electronic expansion valves 92 and 94 compact.

[0094] Continue to refer Figure 6The stacked refrigerant sensor 31, the main housing 51, and the valve body 1 are connected together via a sensor connector 71. The sensor connector 71 can be a screw. The sensor connector 71 penetrates at least one of the main housing 51 and the refrigerant sensor 31 and is fixedly connected to the valve body 1.

[0095] exist Figure 6 In the illustrated embodiment, the main housing 51 is sandwiched between the refrigerant sensor 31 and the valve body 1 , and the sensor connector 71 penetrates the refrigerant sensor 31 and the main housing 51 .

[0096] 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 main housing 51 against the valve body 1 .

[0097] 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 is connected to the main control chamber 51a; the main opening 51b can be oriented in a direction away from the valve body 1 and allows the main electronic 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.

[0098] Continue to refer 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 groove to accommodate the main seal 81.

[0099] Continue to refer Figure 3 、 4 , 5, 8A, 8B, the main housing 51 has a sensor hole 51c that communicates with the main control chamber 51a. The refrigerant sensor 31 extends through the sensor hole 51c. A portion of the refrigerant sensor 31 is located within the main control chamber 51a and is electrically connected to the main electrical control board 4. The other portion of the refrigerant sensor 31 is located outside the main control chamber 51a and is used to detect refrigerant in the second refrigerant passage 12. The portion of the refrigerant sensor 31 located within the main control chamber 51a is pressed against the main housing 51.

[0100] like Figure 3 、 6 As shown, the electronic expansion valves 92, 94 further include 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.

[0101] To fix the valve assembly 2, Figure 3 、 4 As shown in Figures 7 and 8, the 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 engages with a portion of the valve assembly 2 located within the valve body 1 to secure the valve assembly 2 to the valve body 1. This design facilitates assembly of the valve assembly 2 to 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.

[0102] More specifically, the valve assembly connector 72 is provided to be inserted into the valve body 1 from the side of the valve body 1 where the main electric control board 4 is provided. The valve assembly connector 72 may be a latch.

[0103] like Figure 4 、 5 As shown in Figures 7, 8A, and 8B, the main shell 51 has a drive chamber 51d and a valve assembly hole 51e, and the valve assembly hole 51e is connected to the drive chamber 51d; the valve assembly 2 passes through the valve assembly hole 51e; wherein, a part of the valve assembly 2 is located in the drive chamber 51d and is electrically connected to the main electric control board 4; the other part of the valve assembly 2 is located outside the main control chamber 51a, and is used to throttle the refrigerant in the first refrigerant channel 11.

[0104] Continue to refer Figure 4 、 5 The coil assembly 21 is fixed as an insert within the drive chamber 51d via injection molding. The valve core assembly 22 is inserted into the drive chamber 51d through the valve assembly hole 51e and positioned within the center of the coil assembly 21. The coil assembly 21 is electrically connected to the main electronic control board 4 within the main control chamber 51a via a pin. This pin, as an insert during the injection molding process, penetrates the partition between the drive chamber 51d and the main control chamber 51a. The valve seat 221 and valve core 222 are positioned outside the drive chamber 51d.

[0105] like Figure 3 、 4 As shown in Figures 5 and 6, the valve assembly seal 83 is disposed circumferentially around the valve assembly aperture 51e. The valve assembly seal 83 is clamped between the valve assembly 2 and the main housing 51 to seal the valve assembly aperture 51e. The valve assembly seal 83 is compressed radially against the housing 225 of the valve assembly 2 by the main housing 51. More specifically, the valve assembly seal 83 is compressed at the joint between the housing 225 and the connecting seat 224.

[0106] like Figure 7As shown, the main control chamber 51a comprises a first chamber 51a-1, a second chamber 51a-2, and a corner chamber 51a-3. The first and second chambers 51a-1, 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, and to the side of the valve body 1 where the second chamber 51a-2 is located. Part of the main electronic control board 4 is located in the first chamber 51a-1, while the remaining part is located in the corner chamber 51a-3. This design increases the volume of the main control chamber 51a, providing more space for the main electronic control board 4 to extend. A corner of the valve body 1 refers to the intersection of the outer surfaces of two adjacent sides of the valve body 1.

[0107] In addition, the valve assembly 2 is electrically connected to the portion of the main electric control board 4 located in the corner cavity 51a-3. This design makes the length of the pins required to achieve the electrical connection shorter.

[0108] The second cavity 51a-2 is located on the side of the valve body 1 where the valve assembly 2 is located. The valve assembly sensors 32, 33 are located in the second cavity 51a-2. The valve assembly sensors 32, 33 are electrically connected to the portion of the main electric control board 4 located in the corner cavity 51a-3. More specifically, referring to Figure 7 The valve assembly sensors 32, 33 are mounted on the connecting circuit boards 401, 402 and are electrically connected to the connecting circuit boards 401, 402. The connecting circuit boards 401, 402 are arranged in the main control chamber 51a and are fixedly connected to the main housing 51. The connecting circuit boards 401, 402 are electrically connected to the main electric control board 4 through pins.

[0109] like Figure 5 , 7, the main housing 51 extends from one side of the valve body 1, around a corner of the valve body 1, and 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, and to the side of the valve body 1 where the valve assembly 2 is located. This solution improves the integrity of the main housing 51 and facilitates the assembly and manufacture of the electronic expansion valves 92, 94.

[0110] like Figure 3 、 5 As shown in Figures 7 and 8, the electronic expansion valves 92 and 94 further include a housing connector 73 that connects the main housing 51 and the valve body 1. One end of the housing connector 73 connects 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 connects to the valve body 1 on the side opposite the side where the main electronic control board 4 is located. The provision of the housing connector 73 improves the stability of the connection between the main housing 51 and the valve body 1.

[0111] like Figure 3 、 8AAs shown in Figures 8B, 9A to 9D, the side of the valve body 1 where the refrigerant sensor 31 is provided has a first flat portion 13 and a first raised portion 14; wherein the first raised 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 configured to be inserted into the first raised portion 14. The second mounting cavity 16 is provided on the first raised portion 14. This design ensures that the first raised portion 14 has sufficient thickness to cooperate with the connector that secures the refrigerant sensor 31. The first raised portion 14 is provided with a connecting hole 14a for connecting the refrigerant sensor 31. The connecting hole 14a is configured to be plugged into and mate with the connector that secures the refrigerant sensor 31.

[0112] The main housing 51 has a second flat portion 511 and a second raised portion 512 on one side near the valve body 1. The second raised portion 512 protrudes from the second flat portion 511 in the same direction as the sensor 31 is inserted into the valve body 1. The second flat portion 511 is positioned opposite the first raised portion 14, while the second raised portion 512 is positioned opposite the first flat portion 13. This design helps increase the volume of the main control chamber 51a.

[0113] like Figure 5 and Figure 8B As shown, the main electric control board 4 can be fixed to 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 main electric control board 4 installed in the main control chamber 51a. Figure 8B The main housing 51 has post holes 513 for fixing the main electric control board 4 .

[0114] like Figure 3 、 4 As shown in Figures 5 and 6 , the electronic expansion valves 92 and 94 further include a first valve body seal 801 , a second valve body seal 802 and a third valve body seal 803 .

[0115] The first valve body seal 801 is disposed in the second installation 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 .

[0116] The second valve body seal 802 and the third valve body seal 803 are respectively arranged in the first installation cavity 15 and are arranged 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.

[0117] 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 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 all refrigerant in the first refrigerant passage 11 can pass through the valve hole 221a.

[0118] 10A to 10D as well as Figure 11 、 12 13, 14A, 14B, 15A, 15B show a second embodiment of the electronic expansion valve 92, 94 of the present invention. The same reference numerals are used for the same components as the first embodiment, and the same technical solutions as the first embodiment are not described again.

[0119] refer to 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 is in communication with the drive chamber 53a; the valve assembly 2 extends through the valve assembly hole 53b; a portion of the valve assembly 2 is located within the drive chamber 53a and is electrically connected to the main electrical control board 4; another portion of the valve assembly 2 is located outside the drive chamber 53a and is used to throttle the refrigerant in the first refrigerant channel 11; the sub-housing 53 is detachably connected to the main housing 51. This solution provides a high degree of modularity for the electronic expansion valves 92, 94, making them easy to disassemble.

[0120] Continue to refer Figure 12 、 13 The coil assembly 21 is fixed as an insert within the drive chamber 53a via injection molding. The valve core assembly 22 is inserted into the drive chamber 53a through the valve assembly hole 53b and positioned within the center of the coil assembly 21. The coil assembly 21 is electrically connected to the main electronic control board 4 within the main control chamber 51a via the flexible conductive member 42. The valve seat 221 and valve core 222 are positioned outside the drive chamber 53a.

[0121] like Figure 11 、 12 As shown in Figures 13 and 14, the valve assembly seal 84 is disposed circumferentially around the valve assembly aperture 53b. The valve assembly seal 84 is clamped between the valve assembly 2 and the auxiliary housing 53 to seal the valve assembly aperture 53b. The auxiliary housing 53 compresses the valve assembly seal 84 against the housing 225 of the valve assembly 2 in the radial direction of the valve assembly 2. More specifically, the valve assembly seal 84 is compressed at the joint between the housing 225 and the connector 224.

[0122] like Figure 11 、 12As shown in Figures 13, 14A, 14B, 15A, and 15B, the secondary housing 53 also has a secondary control chamber 53c and a secondary connection opening 53d; the secondary connection opening 53d is connected to the secondary control chamber 53c; the main housing 51 has a main connection opening 51f; the main connection opening 51f is connected to the main control chamber 51a; the secondary connection opening 53d is configured to communicate with the main connection opening 51f, thereby connecting the secondary control chamber 53c to the main control chamber 51a. The soft conductive member 42 passes through the main connection opening 51f and the secondary connection opening 53d to detachably electrically connect the main electric control board 4 and the valve assembly 2. The soft conductive member 42 can be a soft flat cable. One end of the soft conductive member 42 is configured to be snap-fitted and electrically connected to the main electric control board 4, and the other end is welded to the valve assembly 2.

[0123] Continue to refer Figure 12 、 13 , 15A, the auxiliary control chamber 53c and the main control chamber 51a are located on different sides of the valve body 1, for example, on two 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 located. The auxiliary control chamber 53c is located on the side of the valve body 1 where the valve assembly 2 is located.

[0124] The housing assembly 5 further includes a secondary cover 54. The secondary housing 53 has a secondary opening 53e that communicates with the secondary control chamber 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.

[0125] The electronic expansion valves 92, 94 also include a connecting seal 85; the connecting seal 85 is arranged along the circumference of the secondary connecting opening 53d and the main connecting opening 51f; the connecting seal 85 is clamped between the main shell 51 and the secondary shell 53 to seal the secondary connecting opening 53d and the main connecting opening 51f.

[0126] The valve assembly sensors 32, 33 are arranged in the auxiliary control chamber 53c. The soft conductive member 43 passes through the main connection opening 51f and the auxiliary connection opening 53d to detachably connect the main electric control board 4 and the valve assembly sensors 32, 33. More specifically, referring to Figure 13 The valve assembly sensors 32, 33 are installed on the connecting circuit boards 404, 405 and are electrically connected to the connecting circuit boards 404, 405. The connecting circuit boards 404, 405 are arranged in the auxiliary control chamber 53c and are fixedly connected to the main housing 51. The connecting circuit boards 404, 405 are electrically connected to the main electric control board 4 through the soft conductive parts 43.

[0127] The flexible conductive member 43 may be a flexible flat cable. One end of the flexible conductive member 43 is configured to be snap-connected and electrically connected to the main electric control board 4 , and the other end is welded to the connecting circuit boards 404 , 405 .

[0128] like Figure 11 、13 As shown, the electronic expansion valves 92 and 94 further include a housing connector 74 that connects the auxiliary housing 53 and the valve body 1. One end of the housing connector 74 connects to the auxiliary 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 connects to the valve body 1 on the side opposite the side where the main electronic control board 4 is located. This arrangement provides stability in the connection of the auxiliary housing 53 to the valve body 1.

[0129] like Figure 11 As shown, the electronic expansion valves 92 and 94 further include a housing assembly connector 75. The auxiliary 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.

[0130] like Figure 11 As shown, the main housing 51 has an interface portion 510. The interface portion 510 is electrically connected to the main electric control board 4 through the connection circuit board 403. The interface portion 510 is used to connect to the outside world.

[0131] 16A to 16D as well as Figure 17 、 18 19, 20, 21A, 21B, 22A, and 22B show a third embodiment of the electronic expansion valve 92, 94 of the present invention. Components identical to those of the first embodiment are denoted by the same reference numerals, and the same technical solutions as those of the first embodiment are not described again.

[0132] like 16A to 16D as well as Figure 17 、 22A As shown in Figures 22B and 22B, the housing assembly 5 further includes a sub-housing 55. The sub-housing 55 has a sub-control chamber 55a and a sensor hole 55b. The sensor hole 55b is in communication with the sub-control chamber 55a. The refrigerant sensor 31 extends through the sensor hole 55b. A portion of the refrigerant sensor 31 is located within the sub-control chamber 55a and is electrically connected to the main electrical control board 4. Another portion of the refrigerant sensor 31 is located outside the sub-control chamber 55a and is used to detect refrigerant in the second refrigerant passage 12. The sub-housing 55 is detachably connected to the main housing 51. This arrangement provides a high degree of modularity for the electronic expansion valves 92 and 94, making them easy to disassemble.

[0133] The portion of the refrigerant sensor 31 located in the secondary control chamber 55 a is pressed against the secondary housing 55 .

[0134] refer to Figure 17 、 19, 21A, 21B, 22A, 22B, the secondary housing 55 also has a secondary connection opening 55c; the secondary connection opening 55c is connected to the secondary control chamber 55a; the main housing 51 has a main connection opening 51g; the main connection opening 51g is connected to the main control chamber 51a; the secondary connection opening 55c is configured to communicate with the main connection opening 51g, thereby connecting the secondary control chamber 55a to the main control chamber 51a. The soft conductive member 41 passes through the main connection opening 51g and the secondary connection opening 55c to detachably electrically connect the main electric control board 4 and the refrigerant sensor 31. The soft conductive member 41 can be a soft flat cable. One end of the soft conductive member 41 is configured to be snap-connected and electrically connected to the main electric control board 4, and the other end is welded to the refrigerant sensor 31.

[0135] Continue to refer Figure 19 The auxiliary control chamber 55a and the main control chamber 51a are both located on the side of the valve body 1 where the main electric control board 4 is located. The auxiliary control chamber 55a and the main control chamber 51a are arranged side by side.

[0136] like Figure 17 、 20 As shown, the housing assembly 5 further includes a secondary cover 56. The secondary housing 55 has a secondary opening 55d that 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 away from the valve body 1.

[0137] like Figure 17 、 19 As shown, the electronic expansion valves 92, 94 also include a connecting seal 86; the connecting seal 86 is arranged along the circumference of the secondary connecting opening 55c and the main connecting opening 51g; the connecting seal 86 is clamped between the main shell 51 and the secondary shell 55 to seal the secondary connecting opening 55c and the main connecting opening 51g.

[0138] Continue to refer Figure 19 The refrigerant sensor 31, the auxiliary housing 55, and the valve body 1 are stacked and integrally connected along the stacking direction. One of the auxiliary housing 55 and the refrigerant sensor 31 is clamped between the valve body 1 and the other of the auxiliary housing 55 and the refrigerant sensor 31. This design helps reduce the number of assembly steps for the electronic expansion valves 92 and 94 and makes the electronic expansion valves 92 and 94 compact.

[0139] like Figure 17 、 20As shown, the electronic expansion valves 92 and 94 further include a sensor connector 76. The stacked refrigerant sensor 31, the auxiliary housing 55, and the valve body 1 are integrally connected via the sensor connector 76. The sensor connector 76 may be a screw. The sensor connector 76 penetrates at least one of the auxiliary housing 55 and the refrigerant sensor 31 and is fixedly connected to the valve body 1.

[0140] exist Figure 20 In the illustrated embodiment, the auxiliary housing 55 is sandwiched between the refrigerant sensor 31 and the valve body 1 , and the sensor connector 76 penetrates the refrigerant sensor 31 and the auxiliary housing 55 .

[0141] 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 auxiliary housing 55 against the valve body 1 .

[0142] like Figure 17 、 20 As shown, the electronic expansion valves 92, 94 further include a sensor seal 87; the sensor seal 87 is arranged along the circumference of the sensor hole 55b; the sensor seal 87 is clamped between the auxiliary housing 55 and the valve body 1 to seal the sensor hole 55b.

[0143] The electronic expansion valves 92 and 94 further include a housing assembly connector 77. The auxiliary housing 55 and the main housing 51 are detachably connected via the housing assembly connector 77. The housing assembly connector 77 may be a screw.

[0144] 26A to 30 The fourth embodiment of the electronic expansion valve 92, 94 of the present invention is shown. The same components as the first three embodiments are marked with the same reference numerals, and the parts of the fourth embodiment that are technically identical to the first three embodiments are not described in detail.

[0145] like 26A to 30 As shown, the housing assembly 5 includes a main housing 51, which includes a first main body 514 and a first connecting portion 515. The first main body 514 defines a main control chamber 51a. The main electric control board 4 is disposed within the main control chamber 51a. The valve assembly 2 and the main electric control board 4 are located on different sides of the valve body 1. The first connecting portion 515 is fixed to the valve body 1, and the first connecting portion 515 and the main electric control board 4 are located on the same side 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 electric control board 4 is located, thereby accommodating a larger main electric control board 4. A larger main electric control board 4 can integrate more electronic components, which is very beneficial for achieving intelligent control of the electronic expansion valve. Furthermore, the main housing 51 is fixed to the valve body 1, ensuring stable installation of the main housing 51a.

[0146] like Figure 26C 、 26D As shown, the first connection portion 515 is located outside the main control chamber 51a, so that the operation of fixing the first connection portion 515 to the valve body 1 can be performed outside the main control chamber 51a, thereby avoiding the need to open the main control chamber 51a.

[0147] Continue to refer Figure 26C , the first main body portion 514 has a wide portion 5141 and a narrow portion 5142 arranged along the length direction L; in the 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. Figure 26C In the embodiment, the width direction W is perpendicular to the length direction L. Such a design makes the structure of the main housing 51 compact.

[0148] Continue to refer Figure 26C The two first connection portions 515 are distributed on both sides of the narrow portion 5142 along the width direction W. More specifically, the two first connection portions 515 are symmetrically arranged about the center line of the first main body portion 514 along the length direction L.

[0149] Continue to refer 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. This design makes the structure of the main housing 51 more compact.

[0150] In an embodiment not shown, a sleeve may be provided between the first connection portion 515 and the valve body 1 to fill the gap between the first connection portion 515 and the valve body 1. Both ends of the sleeve may abut against the first connection portion 515 and the valve body 1 respectively.

[0151] refer to Figure 26A 、 26D, 28A, 28B, the shell assembly 5 also includes a sub-shell 55; the sub-shell 55 includes a second main body 551 and a second connecting part 552; the second main body 551 has a sub-control chamber 55a and a sensor hole 55b; the sensor hole 55b is connected to the sub-control chamber 55a; the refrigerant sensor 31 passes through the sensor hole 55b; wherein, a part of the refrigerant sensor 31 is located in the sub-control chamber 55a and is electrically connected to the main electric control board 4; another part of the refrigerant sensor 31 is located outside the sub-control chamber 55a and is used to detect the refrigerant in the second refrigerant channel 12; the second connecting part 552 is detachably connected to the first connecting part 515.

[0152] like Figure 29 、 30 As shown, the first connection portion 515, the second connection portion 552 and the valve body 1 are stacked and connected into one piece along the stacking direction; wherein one of the first connection portion 515 and the second connection portion 552 is clamped between the valve body 1 and the other of the first connection portion 515 and the second connection portion 552. Figure 29 、 30 In the embodiment, the second connection portion 552 is clamped by the first connection portion 515 and the valve body 1 .

[0153] The shell assembly connector 77 connects the stacked first connection portion 515, the second connection portion 552 and the valve body 1 into one body, wherein the shell assembly connector 77 at least passes through one of the first connection portion 515 and the second connection portion 552. Figure 29 、 30 In the embodiment, the housing assembly connector 77 passes through the first connecting portion 515 and the second connecting portion 552 and is fixedly connected to the valve body 1. This design allows the housing assembly connector 77 to not only securely connect the main housing 51 and the auxiliary housing 55 to each other, but also secure the main housing 51 and the auxiliary housing 55 to the valve body 1. As a result, the number of connectors of the electronic expansion valves 92 and 94 is reduced, making the structures of the electronic expansion valves 92 and 94 more compact.

[0154] refer to Figure 27A 、 27B, 29, 30, the first main body 514 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; wherein the first main body 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 on different sides of the valve body 1 and are arranged opposite to the valve body 1, and the connecting surface 514c is arranged opposite to the corner of the valve body 1; wherein the first surface 514a and the main electric control board 4 are located on the same side of the valve body 1, and the second surface 514b and the valve assembly 2 are located on the same side of the valve body 1; the connecting surface 514c extends from the first surface 514a around the corner of the valve body 1 to the second surface 514b.

[0155] like Figure 27A 、 30 As shown, the main housing 51 further includes a step portion 516 ; the step portion 516 is connected to the first surface 514 a , the connecting surface 514 c and the second surface 514 b respectively. This design improves the structural strength of the main housing 51 .

[0156] Continue to refer Figure 27A 、 Figure 30 The step portion 516 includes a support surface 516a, which is used to support the valve body 1 and is located on the same side of the valve body 1 as the valve assembly 2. The valve body 1 applies a force S to the support surface 516a. This force S is perpendicular to the support surface 516a and directed outward from the valve body 1. The point of application of the force S is on the step portion 516. This design improves the stability of the main housing 51 when mounted on the valve body 1.

[0157] Continue to refer Figures 26A to 28B It can be seen that the main shell 51 also includes a main mouth 517, the inner wall of which defines the main connection opening 51g. The auxiliary shell 55 also includes a secondary mouth 553, the inner wall of which defines the secondary connection opening 55c. The main mouth 517 and the secondary mouth 553 are nested with each other so that the main connection opening 51g is connected to the secondary connection opening 55c. In the nested main mouth 517 and the secondary mouth 553, the outer wall of the inner one is provided with a groove for placing the connection seal 86. Figure 28B In the embodiment, the groove is an annular groove 553a provided on the outer wall of the auxiliary mouth portion 553. The connection seal 86 is adapted to be placed in the annular groove 553a to seal the gap between the outer wall of the auxiliary mouth portion 553 and the inner wall of the main mouth portion 517.

[0158] Figure 31 、 32Figures 33, 34, and 35 illustrate an embodiment related to a connecting circuit board 402. Specifically, the electronic expansion valves 92 and 94 include a connecting circuit board 402 and a circuit board positioning member 61. The connecting circuit board 402 is electrically connected to the main electronic control board 4 and the valve assembly sensor 33, respectively, thereby electrically connecting the valve assembly sensor 33 to the main electronic control board 4. The circuit board positioning member 61 is used to press the connecting circuit board 402 against the housing assembly 5, such as the main housing 51. Because 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, thereby enhancing the stability of the installation of the connecting circuit board 402.

[0159] In a specific embodiment, Figure 31 As shown, 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.

[0160] In an embodiment not shown, the circuit board positioning member 61 presses the connecting circuit board 402 onto the auxiliary housing 53 .

[0161] In a more specific embodiment, the connecting circuit board 402 abuts against the housing assembly 5 in the radial direction of the valve assembly 2. This design facilitates positioning of the connecting circuit board 402 on the housing assembly 5, such as the main housing 51 or the auxiliary housing 53. Furthermore, radially pressing the connecting circuit board 402 can offset radial vibrations caused by the operation of the valve assembly 2, thereby preventing the position of the valve assembly sensor 33 from changing.

[0162] In a more specific embodiment, the valve assembly sensor 33 includes a pin 33a, which is plugged into the connecting circuit board 402 and electrically connected to the connecting circuit board 402. By plugging the pin 33a into the connecting circuit board 402, the valve assembly sensor 33 is mounted on the connecting circuit board 402.

[0163] In a more specific embodiment, the connection circuit board 402 is electrically connected to the main electric control board 4 through a conductive member, such as a conductive pin 402 a or a soft conductive member 43 .

[0164] Continue to refer Figure 31 The circuit board positioning member 61 includes a support portion 61a, which abuts against the connecting circuit board 402 in both the radial and axial directions of the valve assembly 2. More specifically, the support portion 61a is stepped, having a radial surface extending radially along the valve assembly 2 and an axial surface extending axially along the valve assembly 2. The radial surface abuts against the connecting circuit board 402 in the axial direction of the valve assembly 2, while the axial surface abuts against the connecting circuit board 402 in the radial direction of the valve assembly 2. The axial surface presses the connecting circuit board 402 against the housing assembly 5 in the radial direction of the valve assembly 2.

[0165] Continue to refer Figure 31 The main control chamber 51a comprises 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, and to the side of the valve body 1 where the second chamber 51a-2 is located. A portion of the main electronic control board 4 is disposed in the first chamber 51a-1, while another portion is disposed in the corner chamber 51a-3. The valve assembly sensor 33 is disposed in the second chamber 51a-2. The connecting circuit board 402 and the circuit board positioning member 61 are both disposed in the main control chamber 51a. The connecting circuit board 402 abuts against the inner wall of the second chamber 51a-2. The connecting circuit board 402 is perpendicular to the main electronic control board 4.

[0166] refer 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 connecting circuit board 402 into the recess 5a. The recess 5a has an opening that allows the connecting circuit board 402 to slide into. The recess 5a limits the connecting circuit board 402 in the axial direction of the valve assembly 2. The connecting circuit board 402 can slide radially along the inner wall of the recess 5a in the valve assembly 2.

[0167] Continue to refer Figure 33 , the circuit board positioning member 61 is fixedly connected to the main electric control board 4. This enables the circuit board positioning member 61 to achieve positioning of the main electric control board 4.

[0168] The circuit board locator 61 is electrically connected to the ground structure 4a of the main electronic control board 4 and to the valve assembly 2 and / or valve body 1. The ground structure 4a of the main electronic control board 4 can be electrically connected to a ground point external to the electronic expansion valves 92 and 94, such as the vehicle frame, via a conductive member such as a pin or cable. This dissipates static electricity that accumulates on the valve assembly 2 and / or valve body 1, thereby improving the electromagnetic compatibility of the electronic expansion valves 92 and 94. Furthermore, the presence of the circuit board locator 61 reduces the number of electronic expansion valves 92 and 94. In this embodiment, the circuit board locator 61 serves as a grounding device.

[0169] refer to Figure 33 、 34 The electronic expansion valves 92 and 94 further include a conductive connector 62 . The circuit board positioning member 61 is fixedly and electrically connected to the main electronic control board 4 via the conductive connector 62 . The conductive connector 62 is electrically connected to the ground structure 4 a of the main electronic control board 4 . The conductive connector 62 secures the main electronic control board 4 and the circuit board positioning member 61 to the housing assembly 5 . The conductive connector 62 may be a screw. The conductive connector 62 is also electrically connected to the circuit board positioning member 61 .

[0170] like Figure 35 As shown, the electronic expansion valves 92 and 94 further include 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 via the grounding member 63. The grounding member 63 and the circuit board positioning member 61 are secured to the housing assembly 5 by fasteners 64. The grounding member 63 and the circuit board positioning member 61 may be metal sheets. The fastener 64 may be a metal screw.

[0171] exist Figure 33 In the embodiment, the grounding structure 4a is a metal conductive layer exposed on the surface of the main electric control board 4. The grounding structure 4a may be in the shape of a ring and is arranged around a through hole allowing the conductive connector 62 to pass through. The conductive connector 62 is conductively connected to the metal conductive layer.

[0172] Figure 31 Another embodiment of a grounding member 63 is shown. In this embodiment, the grounding member 63 takes the form of a pin. One end of the pin is electrically connected to the valve assembly 2, such as the coil assembly 21, by welding. The other end is plugged into and electrically connected to the grounding structure of the main electronic control board 4. On the main electronic control board 4, the grounding member 63 and the multiple coil pins 2a of the valve assembly 2 are aligned 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 function as a grounding device.

[0173] In one embodiment, the valve assembly 2 and the valve body 1 are both made of metallic conductive materials, so when the valve assembly 2 is assembled on the valve body 1 , the valve assembly 2 and the valve body 1 are electrically connected.

[0174] In order to achieve the fixation of the valve assembly 2 and the valve body 1, those skilled in the art can also conclude from the contents of the specification of the present invention that the electronic expansion valve includes: a valve body 1, the 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; the electronic expansion valve 92, 94 also includes: 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 provided, and to cooperate with a portion of the valve assembly 2 located in the valve body 1 to fix the valve assembly 2 on the valve body 1. Such a solution ensures that the valve assembly 2 will not interfere with the valve assembly connector 72 during the process of being fixed on the valve body 1, and the fixing method is also relatively simple.

[0175] The valve assembly connecting member 72 is provided so as to be inserted into the valve body 1 from a side adjacent to a side of the valve body 1 on which the valve assembly 2 is provided.

[0176] 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 is connected to the first mounting cavity 15 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 cooperating with the limiting part of the valve assembly 2 located in the first mounting cavity 15.

[0177] The valve assembly 2 has a recessed portion 221 b for positionally cooperating with the valve assembly connector 72 .

[0178] The valve assembly connector 72 is clamped by the inner wall of the limiting hole 1e and the recess 221b.

[0179] There are two valve assembly connectors 72 , which are respectively engaged with the two sides of the valve assembly 2 in a limiting manner.

[0180] The valve seat 221 of the valve assembly 2 is limitedly matched with the valve assembly connector 72 .

[0181] The two valve assembly connectors 72 are symmetrically arranged with respect to the valve assembly 2 .

[0182] To detect the operating status of the valve assembly 2, those skilled in the art can also deduce, based on the present disclosure, that an electronic expansion valve comprises: 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; a main electrical control board 4 electrically connected to the valve assembly 2; the electronic expansion valves 92 and 94 further comprising: valve assembly sensors 32 and 33; the valve assembly sensors 32 and 33 being electrically connected to the main electrical control board 4; the valve assembly sensors 32 and 33 being used to detect the valve assembly 2; and the valve assembly 2 and the main electrical control board 4 being located on different sides of the valve body 1. This solution enables 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.

[0183] The electronic expansion valves 92 and 94 further include a housing assembly 5 , which includes a main housing 51 ; the main housing 51 has a main control chamber 51 a ; a main electric control board 4 is disposed in the main control chamber 51 a ; and valve assembly sensors 32 and 33 are disposed in the main control chamber 51 a .

[0184] The valve assembly sensor 32 is disposed along the axis of the valve assembly 2 at one 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.

[0185] The valve assembly sensor 33 is provided on the radially outer side of the valve assembly 2. In this embodiment, the valve assembly sensor 33 is a switch type Hall sensor.

[0186] The main control chamber 51a has a first chamber portion 51a-1, a second chamber portion 51a-2 and a corner chamber portion 51a-3; the first chamber portion 51a-1 and the second chamber portion 51a-2 are respectively located on different sides of the valve body 1; the corner chamber portion 51a-3 extends from the side of the valve body 1 where the first chamber portion 51a-1 is provided, bypassing a corner of the valve body 1 and extending to the side of the valve body 1 where the second chamber portion 51a-2 is provided; wherein, a part of the main electric control board 4 is provided in the first chamber portion 51a-1, and the other part is provided in the corner chamber portion 51a-3.

[0187] The valve assembly sensors 32 and 33 are disposed in the second cavity portion 51 a - 2 , and the valve assembly sensors 32 and 33 are electrically connected to a portion of the main electric control board 4 located in the corner cavity portion 51 a - 3 .

[0188] The second cavity 51 a - 2 is located on a side of the valve body 1 where the valve assembly 2 is provided, and the first cavity 51 a - 1 is located on a side of the valve body 1 where the main electric control board 4 is provided.

[0189] The electronic expansion valves 92, 94 also include a housing assembly 5, which includes a main housing 51 and a sub-housing 53; the sub-housing 53 is detachably connected to the main housing 51; the main housing 51 has a main control chamber 51a; the main electric control board 4 is arranged in the main control chamber 51a; the sub-housing 53 has a sub-control chamber 53c, and the valve assembly sensors 32, 33 are arranged in the sub-control chamber 53c.

[0190] The auxiliary shell 53 also has an auxiliary connection opening 53d; the auxiliary connection opening 53d is connected to the auxiliary control chamber 53c; the main shell 51 has a main connection opening 51f; the main connection opening 51f is connected to the main control chamber 51a; the auxiliary connection opening 53d is configured to be connected to the main connection opening 51f, so that the auxiliary control chamber 53c is connected to the main control chamber 51a; the soft conductive member 43 passes through the main connection opening 51f and the auxiliary connection opening 53d to detachably electrically connect the main electric control board 4 and the valve assembly sensors 32, 33.

[0191] The secondary control chamber 53 c is located on the side of the valve body 1 where the valve assembly 2 is provided.

[0192] In order to fix the refrigerant sensor 31 on the electronic expansion valve 92, 94, those skilled in the art can also conclude from the contents of the specification of the present invention: an electronic expansion valve, comprising: 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 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; a main electric control board 4, electrically connected to the valve assembly 2 and the refrigerant sensor 31, respectively; the electronic expansion valve 92, 94 also comprises: a shell assembly 5, including a main shell 51; the main shell 51 has a main control chamber 51a; the main electric control board 4 is arranged in the main control chamber 51a; the refrigerant sensor 31 is pressed onto the shell assembly 5. This solution can improve the stability of the installation of the refrigerant sensor 31 on the electronic expansion valves 92 , 94 .

[0193] The refrigerant sensor 31, the main shell 51 and the valve body 1 are stacked and connected into one piece along the stacking direction; wherein one of the main shell 51 and the refrigerant sensor 31 is clamped between the valve body 1 and the other of the main shell 51 and the refrigerant sensor 31.

[0194] The electronic expansion valves 92 and 94 further include a sensor connector 71 ; the stacked refrigerant sensor 31 , the main housing 51 and the valve body 1 are connected into one body via the sensor connector 71 .

[0195] The portion of the refrigerant sensor 31 located in the main control chamber 51 a is pressed against the main housing 51 .

[0196] The housing assembly 5 further includes a secondary housing 55 ; the secondary housing 55 is detachably connected to the main housing 51 ; and the refrigerant sensor 31 is pressed onto the secondary housing 55 .

[0197] The refrigerant sensor 31 , the sub-shell 55 and the valve body 1 are stacked and connected as a whole along the stacking direction; wherein one of the sub-shell 55 and the refrigerant sensor 31 is clamped between the valve body 1 and the other of the sub-shell 55 and the refrigerant sensor 31 .

[0198] The electronic expansion valves 92 and 94 further include a sensor connector 76 ; the stacked refrigerant sensor 31 , the auxiliary housing 55 and the valve body 1 are connected into one body via the sensor connector 76 .

[0199] The auxiliary shell 55 has an auxiliary control chamber 55a and a sensor hole 55b; the sensor hole 55b is connected to the auxiliary control chamber 55a; the refrigerant sensor 31 passes through the sensor hole 55b; wherein, a part of the refrigerant sensor 31 is located in the auxiliary control chamber 55a and is electrically connected to the main electronic control board 4; the other part of the refrigerant sensor 31 is located outside the auxiliary control chamber 55a and is used to detect the refrigerant in the second refrigerant channel 12.

[0200] The portion of the refrigerant sensor 31 located in the secondary control chamber 55 a is pressed against the secondary housing 55 .

[0201] As shown in Figure 23, the pin of the refrigerant sensor 31 passes through the sensor hole 51c and extends into the main control chamber 51a to be plugged into the main electric control board 4. The portion of the refrigerant sensor 31 located outside the main control chamber 51a is clamped between the main housing 51 and the valve body 1.

[0202] 23, the portion of the refrigerant sensor 31 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 installed in the main control chamber 51a through the main opening 51b.

[0203] As shown in Figure 24, 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, within 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 inserted into the main housing 51 through the opening.

[0204] 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 the refrigerant sensor 31 onto the housing assembly 5 .

[0205] More specifically, the method for manufacturing the electronic expansion valve includes the step of pressing the refrigerant sensor 31 onto the main housing 51 or the sub-housing 55 .

[0206] More specifically, the method for manufacturing 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 one piece along the stacking direction.

[0207] More specifically, the method for manufacturing the electronic expansion valve includes the steps of first stacking the refrigerant sensor 31 , the auxiliary housing 55 and the valve body 1 , and then connecting the refrigerant sensor 31 , the auxiliary housing 55 and the valve body 1 into one piece along the stacking direction.

[0208] More specifically, the method for manufacturing the electronic expansion valve includes the step of integrally connecting the refrigerant sensor 31 , the main housing 51 , and the valve body 1 in a stacking direction using the sensor connector 71 .

[0209] More specifically, the method for manufacturing the electronic expansion valve includes the step of integrally connecting the refrigerant sensor 31 , the auxiliary housing 55 , and the valve body 1 in a stacking direction using the sensor connector 76 .

[0210] Although the present invention is disclosed above in terms of preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Any modifications, equivalent changes and modifications 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 scope of protection defined by the claims of the present invention.

Claims

1. 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 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 passage (11); A main electric control board (4) electrically connected to the valve assembly (2); The housing assembly (5) comprises a main housing (51); the main housing (51) has a main control chamber (51a); the main electric control board (4) is arranged in the main control chamber (51a); a valve assembly sensor (33), the valve assembly sensor (33) being used to detect the valve assembly (2); Characterized in that the electronic expansion valve (92, 94) further comprises: a connecting circuit board (402) for mounting the valve assembly sensor (33); wherein the connecting circuit board (402) is electrically connected to the main electric control board (4) and the valve assembly sensor (33), respectively, thereby electrically connecting the valve assembly sensor (33) to the main electric control board (4); A circuit board positioning member (61) is used to press the connecting circuit board (402) onto the housing assembly (5); the valve assembly sensor (33) includes a pin (33a); the pin (33a) is plugged into the connecting circuit board (402) and is electrically connected to the connecting circuit board (402); The main control chamber (51a) comprises a first chamber portion (51a-1) and a second chamber portion (51a-2); the first chamber portion (51a-1) and the second chamber portion (51a-2) are respectively located on different sides of the valve body (1); The second cavity (51a-2) is located on a side of the valve body (1) where the valve assembly (2) is arranged; the valve assembly sensor (33) is arranged in the second cavity (51a-2); The connecting circuit board (402) and the circuit board positioning member (61) are both arranged in the main control cavity (51a), wherein the connecting circuit board (402) abuts against the inner wall of the second cavity portion (51a-2).

2. The electronic expansion valve according to claim 1, wherein: The connecting circuit board (402) abuts against the housing assembly (5) along the radial direction of the valve assembly (2).

3. The electronic expansion valve according to claim 2, wherein: The circuit board positioning member (61) comprises a supporting portion (61a), and the supporting portion (61a) abuts against the connecting circuit board (402) along the radial direction and the axial direction of the valve assembly (2).

4. The electronic expansion valve according to claim 1, wherein: The main control chamber (51a) has an angle chamber portion (51a-3); the angle chamber portion (51a-3) extends from a side of the valve body (1) provided with the first chamber portion (51a-1), around a corner of the valve body (1), and to a side of the valve body (1) provided with the second chamber portion (51a-2); Part of the main electric control board (4) is arranged in the first cavity (51a-1), and the other part is arranged in the corner cavity (51a-3).

5. The electronic expansion valve according to claim 1, wherein: The housing assembly (5) has a groove (5a); the circuit board positioning member (61) presses the connecting circuit board (402) into the groove (5a).

6. The electronic expansion valve according to claim 1, wherein: The circuit board positioning member (61) is fixedly connected to the main electric control board (4).

7. The electronic expansion valve according to claim 1, wherein: The circuit board positioning member (61) is electrically connected to the grounding structure (4a) on the main electric control board (4), and is also electrically connected to the valve assembly (2) and / or the valve body (1).

8. The electronic expansion valve according to claim 7, wherein: The electronic expansion valve (92, 94) further includes a conductive connector (62); the circuit board positioning member (61) is fixedly and electrically connected to the main electric control board (4) via the conductive connector (62); the conductive connector (62) is electrically connected to the grounding structure (4a) of the main electric control board (4); wherein the conductive connector (62) fixes the main electric control board (4) and the circuit board positioning member (61) to the housing assembly (5).

9. The electronic expansion valve according to claim 7, wherein: The electronic expansion valve (92, 94) further includes 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) via the grounding member (63); wherein the grounding member (63) and the circuit board positioning member (61) are fixed to the housing assembly (5) by the fastener (64).

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