Electronic expansion valve and thermal management components

Abstract

An electronic expansion valve and a thermal management component, the electronic expansion valve comprising a valve core, a rotor assembly, a stator assembly and a circuit board, the stator assembly being electrically connected to the circuit board; the electronic expansion valve having a valve port, the valve core moving relative to the valve port; the valve body comprising a first circulation portion, a second circulation portion, a first cavity and a second cavity, the first cavity being located above the valve port, the second cavity being located below the valve port, the first circulation portion comprising a first subsection and a first segment, the first subsection being used for connection with an external pipe, the first segment being directly connected to the first cavity; the second circulation portion comprising a second subsection and a second segment, the second subsection being used for connection with an external pipe, the second segment being directly connected to the second cavity; along the clockwise direction, the angle formed between at least one of the center line of the first segment and the center line of the second segment and the center line of the valve core is an acute angle; in this way, the electronic expansion valve can be installed in matching with the pipe of the adapter and the pipe of the external system.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and in particular to a thermal management component and an electronic expansion valve. Background Art

[0002] See also Figure 1 As shown, Figure 1 Disclosed is a thermal management component 400', which can be applied to an automobile air conditioning system, a heat pump system and a battery cooling system. The thermal management component 400' includes a heat exchanger 500' and a thermal expansion valve 4', which are integrated and assembled with the heat exchanger 500' through an adapter 501'. The thermal expansion valve 4' includes a first flow portion 41' and a second flow portion 42', the second flow portion 42' is connected to a pipe 5011' of the adapter 501', and the first flow portion 41' is connected to a pipe 10' of an external system; the thermal expansion valve 4' includes an air box cover 43', a diaphragm 44' and a transmission rod 45', a medium cavity 47' is formed between the air box cover 43' and the diaphragm 44', and the medium cavity 47' is filled with a power medium. When the system is working, the power medium can sense the superheat of the working medium in the heat exchanger outlet channel 5012', causing the power medium to expand or contract and act on the diaphragm 44' to generate an axial force, and then directly or indirectly transmit the axial force to the transmission rod 45' so that the transmission rod 45' can move axially, and then the transmission rod 45' pushes the valve core component 46' to move relative to the valve port 120', thereby changing the opening of the valve port 120' to adjust the refrigerant flow. This method of using the thermal characteristics of the power medium to achieve driving has a relatively low response sensitivity, which makes the control accuracy of the flow relatively low; therefore, when the relative position of the connecting pipe 5011' and the connecting pipe 10' of the external system remains unchanged, how to improve the control accuracy of the flow is a technical issue that needs to be considered during design. Summary of the invention

[0003] In order to solve the problems existing in the background technology, the purpose of the present invention is to provide an electronic expansion valve. When the relative positions of the connecting pipe of the adapter and the connecting pipe of the external system remain unchanged, the electronic expansion valve can be installed in matching with the connecting pipe of the adapter and the connecting pipe of the external system on the one hand, and on the other hand, it can help to improve the control accuracy of the flow rate.

[0004] To achieve the above object, an embodiment of the present invention adopts the following technical solution:

[0005] An electronic expansion valve, the electronic expansion valve comprises a valve body, a valve core, a rotor assembly, a stator assembly and a circuit board, the stator assembly is located at the periphery of the rotor assembly, and the stator assembly is electrically connected to the circuit board; the electronic expansion valve has a valve port, the valve core moves relative to the valve port and can adjust the opening of the valve port; the valve body comprises a first circulation portion and a second circulation portion, it is defined that at least part of the first circulation portion is located above the valve port, and at least part of the second circulation portion is defined to be located below the valve port; the electronic expansion valve has a first cavity and a second cavity, it is defined that the first cavity is located above the valve port, the second cavity is located below the valve port, the first circulation portion is communicated with the first cavity, and the second circulation portion is communicated with the second cavity; the valve body comprises a first wall surface and a second wall surface, the first wall surface and the second wall surface are respectively located on both sides of the valve body; the first circulation portion comprises a first sub-segment and a first segment, the first sub-segment is perpendicular to the first wall surface The first subsection is used for connection with an external pipe, and the first segment is directly connected with the first cavity; the second flow portion includes a second subsection and a second segment, the second subsection is perpendicular to the second wall, the second subsection is used for connection with an external pipe, and the second segment is directly connected with the second cavity, and the flow cross-sectional area of ​​the first segment is smaller than the flow cross-sectional area of ​​the second segment; in the center line of the first segment, the portion located in the first segment is defined as the first line, and in the center line of the second segment, the portion located in the second segment is defined as the second line; a section plane is defined, the center line of the valve core is located in the section plane, the flow path of the working medium in the first flow portion and the second flow portion is also located in the section plane, and the electronic expansion valve is cut along the section plane to obtain a first section, and on the first section, along the clockwise direction, at least one of the first line and the second line forms an acute angle to the center line of the valve core.

[0006] A thermal management component comprises an electronic expansion valve and a heat exchanger, wherein the electronic expansion valve is fixedly connected to the heat exchanger and the electronic expansion valve is the electronic expansion valve described above.

[0007] In this way, the electronic expansion valve and the thermal management component can use electromagnetic driving to enable the rotor component to drive the valve core to move relative to the valve port. The response sensitivity of this electromagnetic driving method is relatively high, which is beneficial to improve the control accuracy of the flow rate; at the same time, in the first circulation part, the first sub-segment is perpendicular to the first wall of the valve body, the first sub-segment is used for connection with the external pipe, and the first segment is directly connected to the first cavity; in the second circulation part, the second sub-segment is perpendicular to the second wall of the valve body, the second sub-segment is used for connection with the external pipe, and the second segment is directly connected to the first cavity. On the first section, along the clockwise direction, the angle formed between at least one of the first line and the second line and the center line of the valve core is an acute angle; in this way, when the relative positions of the pipe of the adapter and the pipe of the external system remain unchanged, the electronic expansion valve can be installed in matching with the pipe of the adapter and the pipe of the external system. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a cross-sectional structure of a thermal management component in the prior art;

[0009] Figure 2 is a schematic block diagram of an embodiment of a refrigeration system;

[0010] Figure 3 is a three-dimensional structural schematic diagram of an embodiment of a thermal management component of the present invention;

[0011] Figure 4 yes Figure 3 A three-dimensional structural diagram of the electronic expansion valve;

[0012] Figure 5 yes Figure 4 A schematic diagram of the structure of the electronic expansion valve along the AA direction;

[0013] Figure 6 is a cross-sectional structural schematic diagram of a first embodiment of a thermal management component of the present invention;

[0014] Figure 7 yes Figure 6 A schematic diagram of the front view structure of the electronic expansion valve;

[0015] Figure 8 yes Figure 7 Schematic diagram of the structure of the electronic expansion valve along the BB direction;

[0016] Fig. 9 yes Figure 7 or Figure 8 A three-dimensional structural schematic diagram of the middle valve body;

[0017] Fig.10 yes Fig. 9 A schematic diagram of the front view structure of the middle valve body;

[0018] Fig.11 yes Fig.10 Schematic diagram of the structure of the middle valve body along the CC direction section;

[0019] Fig.12 is a cross-sectional structural schematic diagram of a second embodiment of the thermal management component of the present invention;

[0020] Fig.13 yes Fig.12 A schematic diagram of a cross-sectional structure of an electronic expansion valve;

[0021] Fig.14 is a cross-sectional structural schematic diagram of a third embodiment of the thermal management component of the present invention;

[0022] Fig.15 yes Fig.14 A schematic diagram of a cross-sectional structure of an electronic expansion valve;

[0023] Fig.16 is a schematic cross-sectional structure diagram of a fourth embodiment of a thermal management component of the present invention;

[0024] Fig.17 yes Fig.16 A schematic diagram of a cross-sectional structure of an electronic expansion valve;

[0025] Fig.18 is a cross-sectional structural schematic diagram of a fifth embodiment of the thermal management component of the present invention;

[0026] Fig.19 yes Fig.18 A schematic diagram of a cross-sectional structure of an electronic expansion valve;

[0027] Fig. 20 is a cross-sectional structural schematic diagram of a sixth embodiment of the thermal management component of the present invention;

[0028] Fig.21 yes Fig. 20 A three-dimensional structural diagram of the electronic expansion valve;

[0029] Fig. 22 yes Fig.21 A schematic diagram of the front view structure of the electronic expansion valve;

[0030] Fig.23 yes Fig. 22 Schematic diagram of the structure of the electronic expansion valve along the EE direction;

[0031] Fig.24 yes Fig.21 Schematic diagram of the structure of the electronic expansion valve along the DD direction;

[0032] Fig.25 yes Fig. 22 Schematic diagram of the structure of the electronic expansion valve along the FF direction. Specific embodiments

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments:

[0034] In the refrigeration system, the throttling element is used to control the flow of the refrigerant. The throttling element mainly controls the flow of the refrigerant according to the change of the superheat of the system. Since the electronic expansion valve controls the flow of the refrigerant by electromagnetic drive, the response sensitivity of this electromagnetic drive method is relatively high, which is conducive to improving the control accuracy of the flow. In order to improve the control accuracy of the flow, the fields such as automotive air-conditioning systems, heat pump systems and battery cooling systems are gradually using electronic expansion valves as throttling elements.

[0035] Figure 2 It is a schematic block diagram of an implementation of a refrigeration system. In this embodiment, the refrigeration system includes an air-conditioning system and a battery cooling system; the air-conditioning system includes a compressor 100, a condenser 200, a first electronic expansion valve 1 and an evaporator 300. When the air-conditioning system is working, the refrigerant is compressed into a high-temperature and high-pressure refrigerant by the compressor 100. The high-temperature and high-pressure refrigerant becomes a normal-temperature and high-pressure refrigerant after passing through the condenser 200. The normal-temperature and high-pressure refrigerant passes through the first electronic expansion valve 1 and enters the evaporator 300. Since the pressure of the normal-temperature and high-pressure refrigerant decreases after passing through the first electronic expansion valve 1, the refrigerant will vaporize and become a low-temperature refrigerant. The low-temperature refrigerant absorbs a large amount of heat through the evaporator 300 and becomes refrigerant and returns to the compressor 100; the battery cooling system includes a compressor 100, a condenser 200, a second electronic expansion valve 2, a heat exchanger 500 and a battery. When the battery cooling system is working, the refrigerant is compressed into a high-temperature and high-pressure refrigerant through the compressor 100. The high-temperature and high-pressure refrigerant becomes a normal-temperature and high-pressure refrigerant after passing through the condenser 200. The normal-temperature and high-pressure refrigerant passes through the second electronic expansion valve 1, enters the heat exchanger 500 and exchanges heat in the heat exchanger 500. The refrigerant after heat exchange in the heat exchanger 500 flows into the battery to cool the battery. In the present refrigeration system, the first electronic expansion valve 1 and the evaporator 300 can be installed separately in the system pipeline as two independent components, or the first electronic expansion valve 1 and the evaporator 300 can be integrated and assembled together and then installed in the system pipeline. Similarly, the second electronic expansion valve 2 and the heat exchanger 500 can also be installed separately in the system pipeline as two independent components, and of course the second electronic expansion valve 2 and the heat exchanger 500 can also be integrated and assembled together and then installed in the system pipeline; for the convenience of description, the components in which the first electronic expansion valve 1 and the evaporator 300 are integrated and assembled together and the components in which the second electronic expansion valve 2 and the heat exchanger 500 are integrated and assembled together are collectively referred to as thermal management components.

[0036] Figure 3 The heat management component 400 is a schematic diagram of a specific embodiment of the heat management component. In the present technical solution, the heat management component 400 includes a heat exchanger 500 and a second electronic expansion valve 2. The heat exchanger 500 and the second electronic expansion valve 2 are integrated into a whole. Figure 2 In the present invention, the structure of the first electronic expansion valve 1 is the same as that of the second electronic expansion valve 2. The first electronic expansion valve 1 and the second electronic expansion valve 2 are collectively referred to as electronic expansion valves for description. Of course, the structures of the first electronic expansion valve and the second electronic expansion valve may be different, or the battery cooling system may not use an electronic expansion valve. As long as one of the first electronic expansion valve and the second electronic expansion valve has the same structure as the electronic expansion valve of the present technical solution, it is within the protection scope of the present technical solution.

[0037] See also Figure 4 and Figure 5 The electronic expansion valve 1 includes a valve body 11, a valve core 13, a rotor assembly 14, a stator assembly 15 and a circuit board 16. The electronic expansion valve 1 also has a valve port 120, and the valve port 120 can communicate with the flow channels located on both sides of the valve port 120. The stator assembly 15 is sleeved on the outer periphery of the rotor assembly 14. In this embodiment, a sleeve 19 is provided between the stator assembly 15 and the rotor assembly 14 to isolate the stator assembly 15 and the rotor assembly 14. The stator assembly 15 is electrically connected and / or signal-connected to the circuit board 16. When the electronic expansion valve 1 is working, the current in the winding of the stator assembly 15 is controlled to change according to a predetermined rule, so as to control the stator assembly 15 to generate a changing excitation magnetic field. The rotor assembly 14 rotates under the action of the excitation magnetic field, and the rotor assembly 14 can drive the valve core 13 to move relative to the valve port 120 and adjust the opening of the valve port 120. In this way, the rotor assembly can drive the valve core to move relative to the valve port through an electromagnetic drive mode. The response sensitivity of this electromagnetic drive mode is relatively high, which is conducive to improving the control accuracy of the flow rate.

[0038] See also Figure 4 and Figure 5 The electronic expansion valve 1 further comprises a valve seat 12, which is arranged on the periphery of the valve core 13 and is limited. In this embodiment, the valve port 120 is formed on the valve seat 12, and the valve core 13 changes the flow cross-sectional area of ​​the working medium at the valve port 120 by approaching and moving away from the valve port 120, thereby forming throttling at the valve port 120; see Figure 5 The electronic expansion valve 1 also includes a connector 17, a sleeve 19 covering the outer periphery of the rotor assembly 15, the sleeve 19 and the connector 17 are welded and fixed, and the valve seat 12 is fixedly connected to the connector 17, that is, the sleeve 19 and the valve seat 12 are connected by the connector 17, which is conducive to simplifying the mold, miniaturizing the mold, and facilitating the forming process of the valve seat 12; of course, the connector 17 can also be formed integrally with the valve seat 12, so there is no need to connect the two.

[0039] See also Figure 5 and Figure 8 The electronic expansion valve 1 has a first chamber 210 and a second chamber 220. The first chamber 210 is defined to be located above the valve port 120, and the second chamber 220 is defined to be located below the valve port 120. Working medium can flow through the first chamber 210 and the second chamber 220.

[0040] In the present invention, the electronic expansion valve includes a first flow portion and a second flow portion. Specifically, the first flow portion and the second flow portion are formed on the valve body, and the working medium in the first flow portion can be connected with the working medium in the second flow portion. It is defined that at least part of the first flow portion is located above the valve port, and at least part of the second flow portion is located below the valve port, so that the working medium can form a throttling at the valve port; the valve body includes a first wall surface and a second wall surface, and the first wall surface and the second wall surface are respectively located on both sides of the valve body; the first flow portion includes a first subsection and a first segment, the first subsection is perpendicular to the first wall surface, the first subsection is used for connection with an external pipe, and the first segment is directly connected to the first cavity; the second flow portion includes a second subsection and a second segment, the second subsection is perpendicular to the second wall surface, the second subsection is used for connection with an external pipe, and the second segment is directly connected to the second cavity, so that Figure 1 The pipe 5011' of the intermediate transfer part and the pipe 10' of the external system can be installed horizontally; in the center line of the first segment, the part located in the first segment is defined as the first line, and in the center line of the second segment, the part located in the second segment is defined as the second line; a section plane is defined, the center line of the valve core is located in the section plane, and the flow path of the working medium in the first circulation part and the second circulation part is also located in the section plane. The electronic expansion valve is cut along the section plane to obtain a first section. On the first section, along the clockwise direction, the angle formed between at least one of the first line and the second line and the center line of the valve core is an acute angle. When Figure 1 When the relative positions of the connecting pipe 5011' of the intermediate adapter and the connecting pipe 10' of the external system remain unchanged, the first circulation portion can be connected to the first cavity and / or the second circulation portion can be connected to the second cavity by tilting, so that the working medium can flow into the first cavity and / or the second cavity, so that the electronic expansion valve can be installed in matching with the connecting pipe of the adapter and the connecting piece of the external system; in addition, in the present invention, the first circulation portion serves as the inflow end of the working medium, and the second circulation portion serves as the outflow end of the working medium. When the electronic expansion valve is used in the automobile air-conditioning system and / or the heat pump system and / or the battery cooling system, the high-pressure working medium flows from the first circulation portion into the first cavity, combined with Figure 5Since the rotor assembly 14 can drive the valve core 13 to move relative to the valve port 120 and adjust the opening of the valve port 120, the working medium in the first chamber can be throttled at the valve port, and the working medium after throttling flows into the second chamber. Since the second flow portion is connected to the second chamber, the working medium in the second chamber can flow out from the second flow portion.

[0041] In view of the above description, the thermal management component and the electronic expansion valve of the present invention have six implementation modes. The structures of the six implementation modes of the thermal management component and the electronic expansion valve of the present invention will be described in detail below.

[0042] In order to facilitate the description of the thermal management components and electronic expansion valves of the six embodiments, the electronic expansion valve of the first embodiment is marked as electronic expansion valve 1, the thermal management component is marked as 400, and other numbers are not suffixed; the electronic expansion valve of the second embodiment is marked as electronic expansion valve 1a, the thermal management component is marked as 400a, and other numbers are suffixed with a; the electronic expansion valve of the third embodiment is marked as electronic expansion valve 1b, the thermal management component is marked as 400b, and other numbers are suffixed with b; the electronic expansion valve of the fourth embodiment is marked as electronic expansion valve 1c, the thermal management component is marked as 400c, and other numbers are suffixed with c; the electronic expansion valve of the fifth embodiment is marked as electronic expansion valve 1d, the thermal management component is marked as 400d, and other numbers are suffixed with d; the electronic expansion valve of the sixth embodiment is marked as electronic expansion valve 1e, the thermal management component is marked as 400e, and other numbers are suffixed with e.

[0043] See also Figure 6 , Figure 6 This is a schematic diagram of the structure of the first implementation of the thermal management component in this technical solution. Figures 7 and 8 for Figure 6 The structural diagram of the electronic expansion valve. Figures 9 to 11 for Figure 7 or Figure 8 The structure of the first embodiment of the electronic expansion valve is described in detail below.

[0044] See also Figure 6 The thermal management assembly 400 includes a heat exchanger 500 and an electronic expansion valve 1, and the heat exchanger 500 and the electronic expansion valve 1 are integrated into a whole. Specifically, the heat exchanger 500 and the electronic expansion valve 1 are integrated into a whole through an adapter 501. Figures 6 to 11 The valve body 11 includes a first flow portion 23 and a second flow portion 24. The first flow portion 23 includes a first segment 231 and a first sub-segment 232. The first segment 231 is connected to the first sub-segment 232. The first segment 231 is closer to the valve port 120 than the first sub-segment 232. The first segment 231 is connected to the first chamber 210. Figure 8 The valve body 11 includes a first wall surface 111 and a second wall surface 112. The first wall surface 111 and the second wall surface 112 are respectively located on both sides of the valve body 11. In the first flow portion 23, the first sub-segment 232 is perpendicular to the first wall surface 111. The first sub-segment 232 is used for connection with an external pipe. In this embodiment, the center line of the first sub-segment 232 is perpendicular to the center line of the valve core 13. The flow cross-sectional area of ​​the first sub-segment 232 is larger than the flow cross-sectional area of ​​the working medium in the first sub-segment 231, which is conducive to reducing the flow resistance. Define a cross-sectional surface, the center line of the valve core 13 is located at In the cut plane, the flow path of the working medium in the first circulation portion 23 and the second circulation portion 24 is also located in the cut plane. The electronic expansion valve 1 is cut along the cut plane to obtain a first cross section. In the center line of the first segment 231, the portion located in the first segment 231 is defined as the first line. In the first cross section, along the clockwise direction, the angle formed between the first line and the center line of the valve core 13 is an acute angle; in this way, the first circulation portion 23 can be connected to the first chamber 210 in an inclined manner, so that the working medium can flow into the first chamber 210. In this way, when Figure 1 When the relative position of the pipe 5011' of the intermediate transfer member and the pipe 10' of the external system remains unchanged, the position of the second circulation part 24 is used as a reference, and the relative position of the first circulation part is adjusted so that the electronic expansion valve can replace the traditional thermal expansion valve and thus Figure 1 The pipe of the intermediate transfer piece and the connecting piece of the external system are installed in a matching manner, which is also beneficial to improving the control accuracy of the flow.

[0045] See also Figure 8 On the first cross section, an extension line L1 is made along the extension direction of the first segment 231 toward the direction close to the first sub-segment 232, and the extension line L1 does not intersect the first sub-segment 232; in this way, when processing the first segment 231, the drill bit will not damage the structure of the first sub-segment 232; in this embodiment, the first sub-segment 232 is used for connection with an external pipe.

[0046] See also Figure 5 , Figure 6 , Figure 8 and Fig.11 , the flow cross-sectional area of ​​the first segment 231 is greater than the flow cross-sectional area of ​​the valve port 120, which is beneficial to prevent the working medium from forming throttling at the first segment 231; along the extension direction of the first segment 231, the distance between the first segment 231 and the peripheral side wall 211 of the first cavity is greater than or equal to 2 mm; this is beneficial to ensure the structural strength of the first segment 231; in addition, in this embodiment, when the electronic expansion valve 1 is working, the working medium flows into the first cavity 210 from the outlet 2310 of the first segment 231, and the inlet 2311 of the first segment 231 is formed on the bottom surface of the first sub-segment 232, which is relatively beneficial to the processing of the first segment 231.

[0047] See also Figure 8 and Fig.11 The first circulation portion 23 further includes a first accommodating portion 233, the first accommodating portion 233 has an accommodating cavity, the opening end of the first accommodating portion 233 is formed on the first wall surface 111 of the valve body 11, the first accommodating portion 233 is communicated with the first sub-segment 232, the diameter of the first accommodating portion 233 is greater than the diameter of the first sub-segment 232, and the first accommodating portion 233 is connected to the first sub-segment 232. Figure 6 The accommodating cavity of the first accommodating portion 233 is used to place the first sealing ring 401 to prevent the working medium from leaking at the connection between the first subsection 232 and the external connecting pipe 10.

[0048] See also Figure 8 and Fig.11 The second flow portion 24 includes a second sub-segment 243 and a second sub-segment 241. The second sub-segment 243 is perpendicular to the second wall surface 112. The second sub-segment 242 is used for connection with an external pipe. The second sub-segment 242 is directly connected to the second cavity 220. In this embodiment, the second sub-segment 243 and the second sub-segment 241 are the same segment. For the convenience of describing the second sub-segment and the second segment, see Fig.11 In this embodiment, the second segment 241 is located at Fig.11 To the right of the dotted line, the second sub-segment 243 is located Fig.11 To the left of the dotted line, the second subsection 243 and the second subsection 241 are the same section. Specifically, the flow cross-sectional areas of the second subsection 243 and the second subsection 241 are equal. The second subsection 243 and the second subsection 241 are both located at Figure 8 Below the valve port 120 , the flow cross-sectional area of ​​the second segment 241 is larger than the flow cross-sectional area of ​​the valve port 120 , which helps to prevent secondary throttling from being formed at the second segment 241 , thereby affecting the flow rate.

[0049] See also Fig.11 The second circulation portion 24 further includes a second accommodating portion 242, the opening end of the second accommodating portion 242 is formed on the second wall surface 112, the second accommodating portion 242 is connected to the second sub-segment 243, the diameter of the second accommodating portion 242 is greater than the diameter of the second sub-segment 243, and the second accommodating portion 242 is connected to the second sub-segment 243. Figure 6 The second accommodating portion 242 is used to place the second sealing ring 402 to prevent the working medium from leaking at the connection between the second segment 241 and the connecting pipe 5011 of the connecting piece 501.

[0050] See also Figure 8 and Fig.11The flow cross-sectional area of ​​the first segment 231 is smaller than the flow cross-sectional area of ​​the second segment 241, because the liquid high-pressure working medium first flows into the first chamber 210 through the first segment 231, and then throttles through the valve port 120, which on the one hand will cause the pressure of the high-pressure working medium to drop, and on the other hand will cause the liquid working medium to become a gas-liquid mixed working medium. At this time, the flow velocity of the working medium in the second segment 241 will be higher than the flow velocity of the working medium in the first segment 231, and the flow cross-sectional area of ​​the working medium in the first segment 231 is smaller than the flow cross-sectional area of ​​the working medium in the second segment 241, which is beneficial to improving the flow stability of the working medium, and further beneficial to reducing the generation of vortices.

[0051] See also Figure 3 , Figure 6 and Figure 8 In this embodiment, the working medium flows in through the first circulation part 23, and then flows into the heat exchanger 500 from the second circulation part 24 after being throttled by the valve port 120. The working medium after heat exchange in the heat exchanger 500 flows out through the outlet channel 5012 of the adapter 501. In this embodiment, a sensor is generally arranged near the outlet channel 5012 of the adapter 501 to collect relevant parameters (such as temperature and / or pressure, etc.) of the working medium at the outlet of the heat exchanger 500. The sensor is connected to the control unit in the system through a wiring harness. After the control unit in the system obtains the relevant parameters, it adjusts the opening of the electronic expansion valve according to the corresponding control program.

[0052] See also Fig.12 , Fig.12 This is a schematic diagram of the structure of the second implementation of the thermal management component in this technical solution. Fig.13 for Fig.12 A structural schematic diagram of an electronic expansion valve is shown in the figure; the structure of a second embodiment of the electronic expansion valve will be introduced in detail below.

[0053] See also Fig.12 and Fig.13 The second flow portion 24a includes a second segment 241a and a second sub-segment 243a, the second sub-segment 243a is connected to the second segment 241a, the second segment 241a is closer to the valve port 120 than the second sub-segment 243a, the second segment 241a and the second sub-segment 243a are both located below the valve port 120, the flow cross-sectional area of ​​the second segment 241a is larger than the flow cross-sectional area of ​​the valve port 120, which helps prevent secondary throttling from being formed at the second segment 241a, thereby affecting the flow rate; in addition, the flow cross-sectional area of ​​the second sub-segment 243a is larger than the flow cross-sectional area of ​​the second segment 241a, which helps reduce the flow resistance; in this embodiment, the second segment 241a and the second sub-segment 243a are different segments.

[0054] See also Fig.13The second circulation portion 24a also includes a second accommodating portion 242a, the opening end of the second accommodating portion 242a is formed on the second wall surface 112a, the second accommodating portion 242a is connected to the second sub-segment 243a, the diameter of the second accommodating portion 242a is larger than the diameter of the second sub-segment 243a, and the second accommodating portion 242a is used to place the second sealing ring 402 to prevent the working medium from leaking at the connection between the second sub-segment 243a and the connecting pipe 5011a of the adapter.

[0055] Compared with the first embodiment of the thermal management component and the electronic expansion valve, in this embodiment, the second segment 241a and the second sub-segment 243a are different segments; in this embodiment, other structures of the electronic expansion valve can refer to the first embodiment of the electronic expansion valve, which will not be described in detail here.

[0056] See also Fig.14 , Fig.14 This is a schematic diagram of the structure of the third implementation of the thermal management component in this technical solution. Fig.15 for Fig.14 A structural schematic diagram of an electronic expansion valve is shown in the figure; the structure of a third implementation manner of the electronic expansion valve will be introduced in detail below.

[0057] See also Fig.14 and Fig.15 The second flow portion 24b includes a second segment 241b and a second sub-segment 243b, the second segment 241b and the second sub-segment 243b are connected, the second segment 241b and the second sub-segment 243b are closer to the valve port 120, the second sub-segment 243b is perpendicular to the second wall surface 112, and the second sub-segment 243b is used for connecting with the connecting pipe 5011b of the adapter; the flow cross-sectional area of ​​the second sub-segment 243b is greater than the flow cross-sectional area of ​​the second segment 241b; a section plane is defined, the center line of the valve core 13 is located in the section plane, and the working medium is in The flow paths in the first circulation portion 23 and the second circulation portion 24 are also located in the section plane. The electronic expansion valve 1 is cut along the section plane to obtain a first section. On the first section, in the center line of the second segment 241b, the portion located in the second segment 241b is defined as the second line. In the clockwise direction, the angle formed between the second line and the center line of the valve core 13 is an acute angle; in this way, the second circulation portion 24b can be connected to the second chamber 220 by tilting, so that the working medium can flow into the second chamber 220. In this way, when Figure 1 When the relative positions of the connecting pipe of the intermediate transfer part and the connecting piece of the external system remain unchanged, the relative position of the second flow part 24b is adjusted based on the position of the first flow part 23b so that the electronic expansion valve can replace the traditional thermal expansion valve and thus Figure 1 The pipe of the intermediate connection piece is installed in matching with the pipe of the external system, which is also helpful to improve the control accuracy of the flow.

[0058] See also Fig.14 and Fig.15 On the first cross section, an extension line L2 is made along the extension direction of the second segment 241b toward the direction close to the second sub-segment 243b, and the extension line L2 does not intersect the second sub-segment 243b; in this way, when processing the second segment 241b, the drill bit will not damage the structure of the second sub-segment 243b; in this embodiment, the second sub-segment 241b is used for connection with the external pipe 10b.

[0059] See also Fig.14 and Fig.15 The flow cross-sectional area of ​​the second segment 241b is greater than the flow cross-sectional area of ​​the valve port 120, which is beneficial to prevent the working medium from forming throttling at the second segment 241b and thus not affecting the flow rate; along the extension direction of the second segment 241b, the distance between the second segment 241b and the peripheral side wall of the second chamber 220 is greater than or equal to 2 mm; this is beneficial to ensure the structural strength of the second segment 241b.

[0060] See also Fig.14 and Fig.15 The first flow portion 23b includes a first segment 231b and a first sub-segment 232b, the first sub-segment 232b is perpendicular to the first wall 111, the first sub-segment 232b is perpendicular to the first wall 112, the first sub-segment 232b is used for connection with an external pipe, and the first segment 231b is directly connected to the first cavity 210; in this embodiment, the first segment 231b and the first sub-segment 232b, for the convenience of describing the first segment 231b and the first sub-segment 232b, see Fig.15 In this embodiment, the first sub-segment 232b is located at Fig.15 To the right of the dotted line, the first segment 231b is located Fig.15 On the left side of the dotted line, the first segment 231b and the first sub-segment 232b are the same segment. Specifically, the flow cross-sectional areas of the first segment 231b and the first sub-segment 232b are equal. The first segment 231b and the first sub-segment 232b are both located above the valve port 120. The flow cross-sectional area of ​​the first segment 231b is greater than the flow cross-sectional area of ​​the valve port 120. This helps prevent secondary throttling from forming at the first segment 231b, thereby affecting the flow rate.

[0061] See also Fig.14 and Fig.15 The first circulation portion 23b further includes a first accommodation portion 233b, the first accommodation portion 233b is communicated with the first sub-segment 232b, the diameter of the first accommodation portion 233b is greater than the diameter of the first sub-segment 232b, and the first Fig.14 and Fig.15The first accommodating portion 233b has an accommodating cavity, which is used to place the first sealing ring 401b to prevent the working medium from leaking at the connection between the first circulation portion 23b and the external connecting pipe 10b; the second circulation portion 24b also includes a second accommodating portion 242b, which is connected to the second sub-segment 243b, and the diameter of the second accommodating portion 242b is larger than the diameter of the second sub-segment 243b. The fourth accommodating portion 42b is used to place the second sealing ring 402b to prevent the working medium from leaking at the connection between the second circulation portion 24b and the connecting pipe 5011b of the adapter.

[0062] Compared with the first embodiment of the thermal management component and the electronic expansion valve, in this embodiment, in the center line of the second segment 241b, the portion located in the second segment 241b is defined as the second line, and along the clockwise direction, the angle formed between the second line and the center line of the valve core 13 is an acute angle, and the first flow portion 23b is a straight segment; compared with the first embodiment of the thermal management component and the electronic expansion valve, in this embodiment, it is equivalent to taking the position of the first flow portion 23b as a reference, and adjusting the relative position of the second flow portion 24b so that the electronic expansion valve can replace the traditional thermal expansion valve and thus Figure 1 The connecting pipe of the intermediate connecting piece and the connecting pipe of the external system are installed in a matching manner; in this embodiment, other structures of the electronic expansion valve can refer to the first implementation method of the electronic expansion valve, which will not be described in detail here.

[0063] See also Fig.16 , Fig.16 is a structural schematic diagram of a fourth implementation mode of the thermal management component in this technical solution, Fig.17 for Fig.16 A structural schematic diagram of an electronic expansion valve is shown in the figure; the structure of a fourth implementation manner of the electronic expansion valve will be introduced in detail below.

[0064] See also Fig.16 and Fig.17 The first flow portion 23c includes a first segment 231c and a first sub-segment 232c, the first segment 231c and the first sub-segment 232c are connected, the first segment 231c is closer to the valve port 120 than the first sub-segment 232c, the first segment 231c and the first sub-segment 232c are both located above the valve port 120, the first sub-segment 232c is used for connecting the external pipe 10c, the flow cross-sectional area of ​​the first segment 231c is larger than the flow cross-sectional area of ​​the valve port 120, which is conducive to preventing secondary throttling from being formed at the first segment 231c, thereby not affecting the flow rate; in addition, the flow cross-sectional area of ​​the first sub-segment 232c is larger than the flow cross-sectional area of ​​the first segment 231c, which is conducive to reducing the flow resistance; in this embodiment, the first segment 231c and the first sub-segment 232c are different segments.

[0065] See also Fig.16 and Fig.17 The first circulation portion 23c further includes a first accommodating portion 233c, the first accommodating portion 233c is communicated with the first sub-segment 232c, the diameter of the first accommodating portion 233c is greater than the diameter of the first sub-segment 232c, and the first accommodating portion 233c is connected to the first sub-segment 232c. Fig.16 The first accommodating portion 233c is used to place the first sealing ring 401c to prevent the working medium from leaking at the connection between the first circulation portion 23c and the external connecting pipe 10c.

[0066] Compared with the third embodiment of the thermal management component and the electronic expansion valve, in this embodiment, the first segment 231c and the first sub-segment 232c are different segments; in the embodiment, other structures of the electronic expansion valve can refer to the third embodiment of the electronic expansion valve, which will not be described here one by one.

[0067] See also Fig.18 , Fig.18 This is a schematic structural diagram of a fifth embodiment of the thermal management component in this technical solution. Fig.19 for Fig.18 A structural schematic diagram of an electronic expansion valve is shown in the figure; the structure of the fifth implementation manner of the electronic expansion valve will be introduced in detail below.

[0068] See also Fig.18 and Fig.19The electronic expansion valve 1d includes a first circulation portion 23d and a second circulation portion 24d, and the working medium in the first circulation portion 23d can be communicated with the working medium in the second circulation portion 24d. In this embodiment, it is defined that at least part of the first circulation portion 23d is located above the valve port 120, and at least part of the second circulation portion 24d is located below the valve port 120; the first circulation portion 23d includes a first segment 231d and a first sub-segment 232d, the first segment 231d is communicated with the first sub-segment 232d, the first sub-segment 232d is used for connection with the external pipe 10d, and the first segment 231d is communicated with the first chamber 210; the second circulation portion 24d includes a second segment 241d and a second sub-segment 243d, the second segment 241d is communicated with the second sub-segment 243d, and the second sub-segment 243d is used for connection with the adapter pipe 5011d; a section plane is defined, the center line of the valve core 13 is located in the section plane, and the working medium is The flow paths in the first circulation portion 23d and the second circulation portion 24d are also located in the section plane. A first section is obtained by making a section along the section plane for the electronic expansion valve 1d. In the center line of the first segment 231d, the portion located in the first segment 231d is defined as the first line. In the center line of the second segment 241d, the portion located in the second segment 241d is defined as the second line. On the first section, along the clockwise direction, the angles formed between the first line and the second line to the center line of the valve core are both acute angles. In this way, the first circulation portion 23d is connected to the first chamber 210 and the second circulation portion 24d is connected to the second chamber 220 by the inclination of the first segment 231d and the second segment 241d, so that the working medium flows into the first chamber 210 through the first circulation portion 26d, and then flows into the second chamber 220 after throttling at the valve port 120. The working medium in the second chamber 220 flows out through the second circulation portion 24d. Figure 1 When the relative positions of the connecting pipe 5011' of the intermediate transfer member and the connecting pipe 10' of the external system remain unchanged, by adjusting the positions of the first flow portion 23d and the second flow portion 24d, the electronic expansion valve can replace the traditional thermal expansion valve and thus Figure 1 The pipe 5011' of the intermediate transfer component and the pipe 110' of the external system are installed in a matching manner, which is also beneficial to improving the control accuracy of the flow.

[0069] Compared with the first embodiment of the thermal management component and the electronic expansion valve, in this embodiment, on the first cross section, along the clockwise direction, the angles formed between the first line and the second line to the center line of the valve core 13 are both acute angles; compared with the first embodiment of the thermal management component and the electronic expansion valve, in this embodiment, it is equivalent to bringing the first subsection 232d and the second subsection 243d closer to each other, so that the electronic expansion valve can replace the traditional thermal expansion valve and thus Figure 1The connecting pipe 5011' of the intermediate connecting piece and the connecting pipe 110' of the external system are matched and installed; in this embodiment, other structures of the electronic expansion valve can refer to the first embodiment and the third embodiment of the electronic expansion valve, which will not be described in detail here.

[0070] See also Fig. 20 , Fig. 20 This is a schematic structural diagram of a sixth embodiment of the thermal management component in this technical solution. Figure 21 to Figure 25 for Fig. 20 The structure of the sixth embodiment of the electronic expansion valve is described in detail below.

[0071] See also Figure 20 to Figure 25 The electronic expansion valve 1e also includes a valve body 11e, and a first circulation portion 23e and a second circulation portion 24e are formed on the valve body 11e; the electronic expansion valve 1e also includes a sensor 2e, and the sensor 2e is fixedly arranged with the valve body 11e, and the sensor 2e is electrically connected and / or signal-connected with the circuit board 16e. The valve body 11e also includes a first flow channel 3e, and the first flow channel 3e is not connected with the first circulation portion 23e and the second circulation portion 24e. At least part of the sensor 2e extends into the first flow channel 3e, and the sensor 2e is used to detect the pressure and / or temperature of the working medium in the first flow channel 3e. In this way, the sensor 2e is integrated and assembled with the electronic expansion valve 1e, which is conducive to improving the integration of the system; combined with Fig. 20 and Fig.23 The working medium flows in through the first circulation part 23e, and then the working medium after throttling through the valve port 120 flows into the heat exchanger 500 from the second circulation part 24e, and the working medium after heat exchange flows out through the first flow channel 3e. In this embodiment, the temperature and / or pressure of the working medium on the outlet side of the heat exchanger is detected by the sensor 2e. Since the sensor 2e is electrically and / or signal-connected to the circuit board 16e, the sensor 2e can transmit the collected temperature and / or pressure signal to the circuit board 16e. After the circuit board 16e obtains the relevant parameters, it adjusts the opening of the electronic expansion valve 1e according to the corresponding control program. Compared with the second embodiment of the thermal management component and the electronic expansion valve, in this embodiment, the sensor 2e and the electronic expansion valve 1e are integrated and assembled together, which is conducive to improving the integration of the system.

[0072] In the sixth embodiment of the electronic expansion valve, only the structure of the first flow portion and the second flow portion in the second embodiment is applied. Of course, the structures of the first flow portion and the second flow portion in the second to fifth embodiments of the electronic expansion valve described in this article are also applicable to this embodiment, so they will not be described one by one here.

[0073] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. An electronic expansion valve, characterized in that: The electronic expansion valve comprises a valve body, a valve core, a rotor assembly, a stator assembly and a circuit board, wherein the stator assembly is located at the periphery of the rotor assembly, and the stator assembly is electrically connected to the circuit board; the electronic expansion valve has a valve port, and the valve core moves relative to the valve port to adjust the opening of the valve port; the valve body comprises a first circulation portion and a second circulation portion, and it is defined that at least a portion of the first circulation portion is located above the valve port, and at least a portion of the second circulation portion is located below the valve port; the valve body comprises a first cavity and a second cavity, and it is defined that the first cavity is located above the valve port, and the second cavity is located below the valve port, the first circulation portion is communicated with the first cavity, and the second circulation portion is communicated with the second cavity; the valve body comprises a first wall surface and a second wall surface, and the first wall surface and the second wall surface are respectively located on both sides of the valve body; the first circulation portion comprises a first sub-segment and a first segment, the first sub-segment is perpendicular to the first wall surface, and the first sub-segment is perpendicular to the first wall surface. A subsection is used for connection with an external pipe, and the first section is directly connected with the first cavity; the second flow portion includes a second subsection and a second section, the second subsection is perpendicular to the second wall, the second subsection is used for connection with an external pipe, and the second section is directly connected with the second cavity, and the flow cross-sectional area of ​​the first section is smaller than the flow cross-sectional area of ​​the second section; in the center line of the first section, the part located in the first section is defined as the first line, and in the center line of the second section, the part located in the second section is defined as the second line; a section plane is defined, the center line of the valve core is located in the section plane, the flow path of the working medium in the first flow portion and the second flow portion is also located in the section plane, and the electronic expansion valve is cut along the section plane to obtain a first section, and on the first section, along the clockwise direction, at least one of the first line and the second line forms an acute angle to the center line of the valve core.

2. The electronic expansion valve according to claim 1, characterized in that: The first segment is connected to the first sub-segment, the first segment is closer to the valve port than the first sub-segment, and the flow cross-sectional area of ​​the first sub-segment is larger than the flow cross-sectional area of ​​the first segment; on the first section, along the clockwise direction, the angle formed between the first line and the center line of the valve core is an acute angle.

3. The electronic expansion valve according to claim 1 or 2, characterized in that: The second segment is connected to the second sub-segment, the second segment is closer to the valve port than the second sub-segment, and the flow cross-sectional area of ​​the second sub-segment is larger than the flow cross-sectional area of ​​the second segment; on the first section, along the clockwise direction, the angle formed between the second line and the center line of the valve core is an acute angle.

4. The electronic expansion valve according to claim 2, characterized in that: The flow cross-sectional area of ​​the first segment is larger than the flow cross-sectional area of ​​the valve port; on the first cross-section, an extension line is drawn along the extension direction of the first segment toward the direction close to the first sub-segment, and the extension line does not intersect the first sub-segment.

5. The electronic expansion valve according to claim 4, characterized in that: The flow cross-sectional area of ​​the second segment is larger than the flow cross-sectional area of ​​the valve port, the flow cross-sectional areas of the second sub-segment and the second segment are equal at each location, the second sub-segment and the second segment are the same segment, and the second sub-segment and the second segment are both located below the valve port.

6. The electronic expansion valve according to claim 4, characterized in that: The flow cross-sectional area of ​​the second segment is larger than the flow cross-sectional area of ​​the valve port, the second sub-segment is connected to the second segment, the second segment is closer to the valve port than the second sub-segment, the flow cross-sectional area of ​​the second sub-segment is larger than the flow cross-sectional area of ​​the second segment, the second sub-segment and the second segment are different segments, and the second sub-segment and the second segment are both located below the valve port.

7. The electronic expansion valve according to claim 3, characterized in that: The flow cross-sectional area of ​​the second segment is larger than the flow cross-sectional area of ​​the valve port; on the first cross-section, an extension line is drawn along the extension direction of the second segment toward the direction close to the second sub-segment, and the extension line does not intersect the second sub-segment.

8. The electronic expansion valve according to claim 7, characterized in that: The flow cross-sectional area of ​​the first segment is larger than the flow cross-sectional area of ​​the valve port, the flow cross-sectional areas of the first sub-segment and the first segment are equal at each location, the first sub-segment and the first segment are the same segment, and the first sub-segment and the first segment are both located above the valve port.

9. The electronic expansion valve according to claim 7, characterized in that: The flow cross-sectional area of ​​the first segment is larger than the flow cross-sectional area of ​​the valve port, the first sub-segment is connected to the first segment, the first segment is closer to the valve port than the first sub-segment, the flow cross-sectional area of ​​the first sub-segment is larger than the flow cross-sectional area of ​​the first segment, the first sub-segment and the first segment are different segments, and the first sub-segment and the first segment are both located above the valve port.

10. The electronic expansion valve according to any one of claims 1 to 9, characterized in that: The electronic expansion valve also includes a sensor, which is fixedly arranged with respect to the valve body, and is electrically and / or signal-connected to the circuit board. The valve body also includes a first flow channel, which is not connected to the first flow portion and the second flow portion, and at least part of the sensor extends into the first flow channel, and the sensor is used to detect the pressure and / or temperature of the working medium in the first flow channel.

11. A thermal management component, comprising an electronic expansion valve and a heat exchanger, wherein the electronic expansion valve is fixedly connected to the heat exchanger, and the electronic expansion valve is the electronic expansion valve according to any one of claims 1 to 10.

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