Coil structure and electric valve

Abstract

The utility model relates to the technical field of valves, in particular to a coil structure and an electric valve. The coil structure comprises a shell, a cover plate and a plug connector, the shell is provided with an assembly cavity, and the cover plate is located at an opening of the assembly cavity and connected with the shell. The plug connector and the cover plate are arranged in a split mode, and at least part of the plug connector is installed in the assembling cavity. The coil structure further comprises a limiting part, and the plug connector is in limiting fit with the shell through the limiting part. According to the coil structure and the electric valve, the problem that in an existing coil component, the installation stability of the plug connector is insufficient is solved.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a coil structure and an electric valve. Background Technology

[0002] Currently, electric valves are commonly installed in refrigeration systems. These electric valves mainly consist of a valve body and a coil component. The coil component contains a stator, and the valve body contains a rotor. When the coil component is energized and generates a magnetic field, the stator inside the coil component can drive the rotor inside the valve body to rotate, thereby moving the valve core and adjusting the refrigerant flow rate at the valve port to achieve higher control precision.

[0003] In related technologies, the coil component includes a housing, a cover plate, and a connector. The cover plate is connected to the housing to form a sealed cavity. The connector is installed in the sealed cavity, and the pins on the connector connect to the outside through connecting holes in the cover plate. However, the connector is prone to misalignment when assembled with the housing and cover plate, which not only makes assembly difficult but also makes it easy for it to dent and loosen during insertion and removal. Utility Model Content

[0004] Therefore, it is necessary to provide a coil structure and an electric valve to solve the problem of insufficient installation stability of the connectors in existing coil components.

[0005] This application provides a coil structure, which includes a housing, a cover plate, and a connector. The housing has an assembly cavity, the cover plate is located at the opening of the assembly cavity and connected to the housing, and the connector is separately disposed from the cover plate and is at least partially installed in the assembly cavity. The coil structure also includes a limiting part, through which the connector is limited and engaged with the housing.

[0006] In one embodiment, the direction of movement of the connector is defined as the Z direction, and the limiting part includes a support plane located in the assembly cavity. The support plane and the connector are arranged along the Z direction, and the support plane abuts against the connector.

[0007] In one embodiment, the limiting portion includes at least two first support columns located on the inner wall of the assembly cavity, each of the first support columns extending axially along the coil structure, and the end face of the first support column near the opening of the assembly cavity forming the support plane.

[0008] In one embodiment, the housing includes a stator mounting portion, a portion of which extends into the assembly cavity, and the first support column is provided on the circumferential inner wall of the assembly cavity and the outer wall of the stator mounting portion.

[0009] In one embodiment, the direction of movement of the connector is defined as the X direction, and the limiting part includes a first X limiting surface and a second X limiting surface located in the assembly cavity. The first X limiting surface, the second X limiting surface and the connector are arranged along the X direction, and the connector is limited between the first X limiting surface and the second X limiting surface.

[0010] In one embodiment, the first X limiting surface and the second X limiting surface are both inner walls of the assembly cavity; the limiting part includes a support plane located on the inner wall of the assembly cavity, and the first X limiting surface and the second X limiting surface are both connected to the support plane; the direction of movement of the plug is defined as the Z direction, the support plane and the plug are arranged along the Z direction, and the support plane and the plug abut against each other.

[0011] In one embodiment, the outer periphery of the connector is provided with a first protrusion and a second protrusion. The bottom surface of the first protrusion and the bottom surface of the second protrusion respectively abut against the corresponding support plane. The side of the first protrusion away from the second protrusion abuts against the first X limiting surface, and the side of the second protrusion away from the first protrusion abuts against the second X limiting surface.

[0012] In one embodiment, the direction of movement of the connector is defined as the Y direction, and the limiting part includes a first Y limiting surface and a second Y limiting surface located in the assembly cavity. The first Y limiting surface, the second Y limiting surface and the connector are arranged along the Y direction, and the connector is limited between the first Y limiting surface and the second Y limiting surface.

[0013] In one embodiment, the first Y-limiting surface and the second Y-limiting surface are both inner walls of the assembly cavity; the limiting part includes a supporting plane located on the inner wall of the assembly cavity, and the first Y-limiting surface and the second Y-limiting surface are both connected to the supporting plane; the direction of movement of the plug is defined as the Z direction, the supporting plane and the plug are arranged along the Z direction, and the supporting plane and the plug abut against each other.

[0014] In one embodiment, the outer periphery of the connector is provided with a third protrusion and a fourth protrusion. The bottom surface of the third protrusion and the bottom surface of the fourth protrusion respectively abut against the corresponding support plane. The side of the third protrusion away from the fourth protrusion abuts against the first Y-limiting surface, and the side of the fourth protrusion away from the third protrusion abuts against the second Y-limiting surface.

[0015] In one embodiment, the coil structure further includes an electronic control board and a plurality of second support columns. The electronic control board is installed in the assembly cavity and is electrically or signal-connected to the connector. The electronic control board has a plurality of limiting grooves. The plurality of second support columns are spaced apart in the assembly cavity and connected to the housing. Each second support column is located in its corresponding limiting groove.

[0016] In one embodiment, the coil structure further includes an electronic control board, which is installed in the assembly cavity and has a first pin hole; the connector includes a first pin, one end of which extends into the first pin hole and is electrically connected to the electronic control board.

[0017] In one embodiment, the control board is further provided with a second pin hole, and the coil structure also includes a motor stator and a second pin. The motor stator and the second pin are disposed in the housing, and one end of the second pin is electrically connected to the motor stator, and the other end is inserted into the second pin hole and electrically connected to the control board.

[0018] In one embodiment, a plurality of first pin holes and a plurality of second pin holes are arranged in parallel, one end of the first pin is press-fitted into the first pin hole and detachably connected to the electronic control board, and the second pin is inserted into the second pin hole and soldered to the electronic control board.

[0019] In one embodiment, the connector further includes a main body, which is an integral injection-molded structure, and the first pin is injection-moldedly connected to the main body.

[0020] In one embodiment, the connector further includes a plurality of reinforcing ribs, which are spaced apart on the main body.

[0021] In one embodiment, the coil structure further includes an electronic control board, which is installed in the assembly cavity. The electronic control board has a first pin hole and a guide hole. The connector includes a first pin and a guide post. One end of the first pin extends into the first pin hole and is electrically connected to the electronic control board. The guide post extends into the guide hole.

[0022] In one embodiment, the bottom wall of the assembly cavity is provided with a groove, the end of the first pin extending out of the first pin hole does not contact the bottom surface of the groove, and the distance between the end of the guide post extending out of the guide hole and the bottom surface of the groove is greater than or equal to zero.

[0023] In one embodiment, the height of the guide post extending from the end of the guide hole to the electronic control board is higher than the height of the first pin extending from the end of the first pin hole to the electronic control board.

[0024] In one embodiment, the height of the guide post extending from the end of the guide hole to the electronic control board is 2mm to 5mm higher than the height of the first pin extending from the end of the first pin hole to the electronic control board.

[0025] In one embodiment, the cover plate has an opening, and part of the connector extends out of the assembly cavity through the opening, and the connector and the cover plate are sealed together; wherein, the connector includes a first pin, the connector has a socket groove, one end of the first pin is located in the assembly cavity and is used to connect with the electronic control board, and the other end passes through the bottom wall of the socket groove and extends into the socket groove.

[0026] In one embodiment, the connector has a first fixing part, and the cover plate has a first mating part corresponding to the first fixing part. The first fixing part and the first mating part surround the periphery of the socket. One of the first fixing part and the first mating part is configured as a welding rib, and the other is configured as a welding groove. The welding rib is inserted into the welding groove and welded in place. Alternatively, a sealing groove is formed between the connector and the cover plate. The sealing groove surrounds the periphery of the socket. The coil structure also includes a sealing element, which is installed in the sealing groove and abuts against the connector and the cover plate respectively.

[0027] This application also provides an electric valve, which includes the coil structure described in any of the above embodiments.

[0028] Compared with the prior art, the coil structure and electric valve provided in this application allow the housing to limit the position of the connector via a limiting part, reducing the probability of the connector becoming misaligned and thus greatly improving the stability of the connector during installation in the assembly cavity. Furthermore, by providing the limiting part, excessive force applied to the control board by the connector during stress can be avoided, thereby reducing the probability of deformation or damage to the control board. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1A cross-sectional view of a coil structure according to an embodiment provided in this application;

[0031] Figure 2 A partial cross-sectional view of a coil structure according to an embodiment provided in this application;

[0032] Figure 3 A schematic diagram illustrating the interaction between a connector and an electronic control board according to an embodiment provided in this application;

[0033] Figure 4 A top view of the housing provided in one embodiment of this application;

[0034] Figure 5 A bottom view of a connector according to an embodiment provided in this application;

[0035] Figure 6 A partial cross-sectional view of a coil structure according to another embodiment provided in this application;

[0036] Figure 7 A partial schematic diagram of a coil structure according to an embodiment provided in this application.

[0037] The symbols in the diagram represent the following meanings:

[0038] 100. Coil structure; 10. Housing; 101. Assembly cavity; 102. Support plane; 103. Groove; 11. Stator mounting part; 12. Limiting part; 121. First support column; 13. Second support column; 14. Third support column; 15. Second fixing part; 20. Cover plate; 201. Socket; 21. First mating part; 22. Second mating part; 30. Connector; 301. Socket slot; 302. Sealing 31. Sealing groove; 32. First pin; 33. Guide post; 34. Reinforcing rib; 35. First fixing part; 36. Main body part; 37. First protrusion; 38. Second protrusion; 39. Third protrusion; 30. Fourth protrusion; 41. Electrical control board; 42. Limiting groove; 43. Guide hole; 44. First pin hole; 45. Second pin hole; 66. Seal; 77. Motor stator; 88. Second pin. Detailed Implementation

[0039] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0043] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0044] Currently, electric valves are commonly installed in refrigeration systems. These electric valves mainly consist of a valve body and a coil component. The coil component contains a stator, and the valve body contains a rotor. When the coil component is energized and generates a magnetic field, the stator inside the coil component can drive the rotor inside the valve body to rotate, thereby moving the valve core and adjusting the refrigerant flow rate at the valve port to achieve higher control precision.

[0045] In related technologies, the coil component includes a housing, a cover plate, and a connector. The cover plate is connected to the housing to form a sealed cavity. The connector is installed in the sealed cavity, and the pins on the connector connect to the outside through connecting holes in the cover plate. However, the connector is prone to misalignment when assembled with the housing and cover plate, which not only makes assembly difficult but also makes it easy for it to dent and loosen during insertion and removal.

[0046] Please see Figures 1-7 To address the issue of insufficient installation stability of connectors in existing coil components, this application provides a coil structure 100. The coil structure 100 includes a housing 10, a cover plate 20, an electronic control board 40, a motor stator 60, and a second pin 70. The housing 10 has an assembly cavity 101, and the cover plate 20 is located at the opening of the assembly cavity 101 and connected to the housing 10. The housing 10 includes a stator mounting portion 11, which can be integrally injection molded with the housing 10. A portion of the stator mounting portion 11 extends into the assembly cavity 101. The stator mounting portion 11 is used to be sleeved on the outer periphery of the motor rotor of the electric valve. The motor stator 60 and the second pin 70 are disposed within the housing 10, and the motor stator 60 is arranged around the stator mounting portion 11. The motor stator 60 cooperates with the motor rotor to drive the motor rotor. Alternatively, the motor stator 60 and the second pin 70 can be injection molded inside the housing 10. The control board 40 is installed inside the assembly cavity 101 and sleeved on the outer periphery of the stator mounting part 11. The control board 40 has a second pin hole 404. One end of the second pin 70 is electrically connected to the motor stator 60, and the other end is inserted into the second pin hole 404 and electrically connected to the control board 40. In this way, the control board 40 is electrically connected to the motor stator 60 to realize the functional control of the motor stator 60.

[0047] Please see Figure 1 and Figure 2 To enable electrical connection between the control board 40 and external components, the coil structure 100 also includes a connector 30. The connector 30 is separately disposed from the cover plate 20, and the connector 30 is at least partially installed in the assembly cavity 101. The control board 40 is electrically or signal connected to the connector 30. The coil structure 100 also includes a limiting part 12, through which the connector 30 is limited and engaged with the housing 10.

[0048] Understandably, with this configuration, the housing 10 can limit the insertion part 30 through the limiting part 12, reducing the probability of the insertion part 30 becoming misaligned, thereby greatly improving the stability of the insertion part 30 during installation in the assembly cavity 101. Furthermore, by providing the limiting part 12, excessive force applied to the electronic control board 40 by the insertion part 30 under stress can be avoided, thus reducing the probability of deformation or damage to the electronic control board 40 under stress.

[0049] Specifically, in one embodiment, such as Figure 3 , Figure 4 and Figure 7 As shown, the direction of movement of the connector 30 is defined as the Z direction. The limiting part 12 includes a support plane 102 located within the assembly cavity 101. The support plane 102 and the connector 30 are arranged along the Z direction, and the support plane 102 abuts against the connector 30. In this way, the limiting part 12 can provide support for the connector 30, further preventing the connector 30 from tilting along the Z direction.

[0050] It should be noted that the Z direction here, as well as the X and Y directions below, can correspond to the height, width, and length directions of the coil structure 100, respectively. Of course, they can also be set reasonably according to actual needs.

[0051] In one embodiment, the limiting portion 12 includes at least two first support pillars 121 located on the inner wall of the assembly cavity 101. Each first support pillar 121 extends axially along the coil structure 100, and the end face of the first support pillar 121 near the opening of the assembly cavity 101 forms a support plane 102. Thus, by having at least two first support pillars 121 positioned opposite each other to provide support for the connector 30, the reliability of the connector 30 is ensured. Simultaneously, the support plane 102 is simple to form, easy to process, and can reduce costs.

[0052] Specifically, the circumferential inner wall of the assembly cavity 101 and the outer wall of the stator mounting portion 11 are both provided with first support columns 121. That is, in this embodiment, the number of first support columns 121 is at least four, and they are arranged in a cross shape to support all four sides of the plug-in 30 and ensure the stability of the plug-in 30 along the Z direction.

[0053] In another embodiment, the direction of movement of the connector 30 is defined as the X direction. The limiting part 12 includes a first X limiting surface and a second X limiting surface located within the assembly cavity 101. The first X limiting surface, the second X limiting surface, and the connector 30 are disposed along the X direction, and the connector 30 is limited to be located between the first X limiting surface and the second X limiting surface. In this way, the movement of the connector 30 along the X direction can be restricted, ensuring the stable installation of the connector 30.

[0054] Specifically, in this embodiment, both the first X-limiting surface and the second X-limiting surface are inner walls of the assembly cavity 101, and both are connected to the support plane 102. That is, the first X-limiting surface, the second X-limiting surface, and the support plane 102 can form a stepped structure. In this way, the cooperation of the first X-limiting surface, the second X-limiting surface, and the support plane 102 can restrict the movement of the plug-in 30 along the X and Z directions by the limiting part 12, effectively preventing the plug-in 30 from shifting.

[0055] Furthermore, the outer periphery of the connector 30 is provided with a first protrusion 351 and a second protrusion 352. The bottom surface of the first protrusion 351 and the bottom surface of the second protrusion 352 respectively abut against the corresponding support plane 102. The side of the first protrusion 351 away from the second protrusion 352 abuts against the first X limiting surface, and the side of the second protrusion 352 away from the first protrusion 351 abuts against the second X limiting surface. By providing the first protrusion 351 and the second protrusion 352, the fit between the connector 30 and the support plane 102, the first X limiting surface and the second X limiting surface is facilitated, and the material usage of the connector 30 is reduced, thereby reducing costs.

[0056] In another embodiment, the direction of movement of the connector 30 is defined as the Y direction. The limiting part 12 includes a first Y limiting surface and a second Y limiting surface located within the assembly cavity 101. The first Y limiting surface, the second Y limiting surface, and the connector 30 are disposed along the Y direction, and the connector 30 is limited to be located between the first Y limiting surface and the second Y limiting surface. In this way, the movement of the connector 30 along the Y direction can be restricted, ensuring the stable installation of the connector 30.

[0057] Specifically, in this embodiment, both the first Y-limiting surface and the second Y-limiting surface are the inner walls of the assembly cavity 101, and both are connected to the support plane 102. That is, the first Y-limiting surface, the second Y-limiting surface, and the support plane 102 can form a stepped structure. In this way, the cooperation of the first Y-limiting surface, the second Y-limiting surface, and the support plane 102 can restrict the movement of the connector 30 along the Y and Z directions by the limiting part 12, effectively preventing the connector 30 from shifting.

[0058] Furthermore, the outer periphery of the connector 30 is provided with a third protrusion 353 and a fourth protrusion 354. The bottom surfaces of the third protrusion 353 and the fourth protrusion 354 respectively abut against the corresponding support plane 102. The side of the third protrusion 353 away from the fourth protrusion 354 abuts against the first Y-limiting surface, and the side of the fourth protrusion 354 away from the third protrusion 353 abuts against the second Y-limiting surface. By providing the third protrusion 353 and the fourth protrusion 354, the fit between the connector 30 and the support plane 102, the first Y-limiting surface, and the second Y-limiting surface is facilitated, and the material usage of the connector 30 is reduced, thereby reducing costs.

[0059] For example, in this embodiment, such as Figure 4 As shown, there are four first support columns 121, and the four first support columns 121 are evenly spaced along the circumference of the connector 30. That is, three of them can be connected to the side wall of the assembly cavity 101, and one can be connected to the outer side wall of the stator mounting part 11, so as to further ensure stable support and limiting of the connector 30. Of course, the number of first support columns 121 can also be set to five or six, etc., according to actual needs, and is not limited here.

[0060] In other embodiments, the limiting part 12 may also be formed by an annular step on the side wall of the assembly cavity 101 in conjunction with a support column on the outer side wall of the stator mounting part 11, or it may be directly formed by a step structure formed on the first support column 121. No further limitation is made here, as long as the same effect can be achieved.

[0061] In one embodiment, such as Figure 4 As shown, the coil structure 100 also includes a plurality of second support columns 13, which are spaced apart within the assembly cavity 101 and connected to the housing 10. The control board 40 has a plurality of limiting grooves 401, wherein each second support column 13 is located within its corresponding limiting groove 401. In other words, the second support columns 13 can limit the movement of the control board 40 through the limiting grooves 401, preventing the control board 40 from shaking within the assembly cavity 101.

[0062] For example, this embodiment provides three second support columns 13, but it is not limited to this. The number of second support columns 13 can also be set to four, five, etc., without further limitation.

[0063] In one embodiment, such as Figure 4 As shown, the coil structure 100 also includes a plurality of third support columns 14. These third support columns 14 are spaced apart within the assembly cavity 101 and connected to the housing 10. Furthermore, along the depth direction of the assembly cavity 101, the ends of the third support columns 14 closest to the control board 40 abut against the control board 40. That is, the height of the third support columns 14 is lower than that of the first support columns 121 and the second support columns 13. Thus, the third support columns 14 can support the control board 40, ensuring the stability of the control board 40 during installation.

[0064] For example, this embodiment provides six third support columns 14, which can be located at the corners or long sides of the electronic control board 40 to further improve the stability of the support. However, it is not limited to this; the number of third support columns 14 can also be seven, eight, etc., and is not limited in this way.

[0065] In one embodiment, the connector 30 includes a main body 35 and a first pin 31. The first pin 31 is connected to the main body 35, and the connector 30 is electrically connected to the electronic control board 40 and external components through the first pin 31. The main body 35 is an integral injection molded structure, and the first pin 31 is injection molded to the main body 35 to ensure the reliability and sealing of the connection between the first pin 31 and the main body 35.

[0066] Specifically, the control board 40 has a first pin hole 403, and one end of the first pin 31 extends into the first pin hole 403 and is electrically connected to the control board 40. In this way, the connector 30 can realize the electrical connection between the control board 40 and external components through the first pin 31.

[0067] More specifically, multiple first pin holes 403 and multiple second pin holes 404 are arranged in parallel. One end of the first pin 31 is press-fitted into the first pin hole 403 and detachably connected to the electronic control board 40. The second pin 70 is inserted into the second pin hole 404 and soldered to the electronic control board 40. In this way, a reliable connection can be achieved between the electronic control board 40 and the first pin 31 and the second pin 70, ensuring the strength of the connection.

[0068] Furthermore, in one embodiment, the connector 30 further includes a guide post 32, and the control board 40 has a guide hole 402, into which the guide post 32 extends. Thus, the cooperation between the guide post 32 and the guide hole 402 improves the reliability of the connection between the first pin 31 and the first pin hole 403, ensuring the relative position between the connector 30 and the control board 40.

[0069] like Figure 3 As shown, to facilitate the connection between the first pin 31 and the control board 40, in one embodiment, the height of the guide post 32 extending from the end of the guide hole 402 to the control board 40 is higher than the height of the first pin 31 extending from the end of the first pin hole 403 to the control board 40. That is, the guide post 32 is longer. Thus, when the connector 30 mates with the control board 40, the guide post 32 makes contact with the control board 40 first. This allows for pre-positioning through the interaction between the guide post 32 and the guide hole 402, ensuring that the first pin 31 on the connector 30 can be smoothly inserted into the control board 40. This effectively improves the installation efficiency between the connector 30 and the control board 40, and also protects the first pin 31, extending its service life.

[0070] Furthermore, the height of the guide post 32 extending from the end of the guide hole 402 to the electronic control board 40 is set to be 2mm~5mm higher than the height of the first pin 31 extending from the end of the first pin hole 403 to the electronic control board 40. It is easy to understand that if the guide post 32 is longer than 5mm above the first pin 31, the guide post 32 is too long, posing a risk of interference with other components and increasing the material cost of the guide post 32. If the guide post 32 is shorter than 2mm above the first pin 31, the guide post 32 is too short, resulting in insufficient pre-positioning and hindering the fit between the first pin 31 and the electronic control board 40. Optionally, the length of the guide post 32 above the first pin 31 can be set to 2mm, 3mm, 4mm, or 5mm, etc., which are not listed here.

[0071] To prevent the parts of the first pin 31 and guide post 32 protruding from the control board 40 after connection with the control board 40 from interfering with the housing 10 and causing the control board 40 to become misaligned or damaged, in one embodiment, the bottom wall of the assembly cavity 101 is provided with a groove 103. The end of the first pin 31 extending out of the first pin hole 403 does not contact the bottom surface of the groove 103, and the distance between the end of the guide post 32 extending out of the guide hole 402 and the bottom surface of the groove 103 is greater than or equal to zero. In this way, the reliability of the fit between the control board 40 and the housing 10 (stator mounting part 11) can be guaranteed, while ensuring that the first pin 31 will not contact the groove 103, thereby further protecting the first pin 31 and extending its service life.

[0072] In one embodiment, such as Figure 5 As shown, the connector 30 also includes a plurality of reinforcing ribs 33, which are spaced apart on the main body 35. It is easy to understand that the reinforcing ribs 33 can increase the structural strength and stability of the connector 30, thereby preventing defects such as dents and loosening from occurring during insertion and removal of the finished product.

[0073] Furthermore, to ensure smooth connection between the connector 30 and external components, the cover plate 20 is provided with a socket 201. A portion of the connector 30 can extend out of the assembly cavity 101 through the socket 201, and the connector 30 and the cover plate 20 are sealed together. The portion of the connector 30 extending out of the assembly cavity 101 has a socket groove 301. One end of the first pin 31 is located inside the assembly cavity 101 and is used to connect with the electronic control board 40, while the other end penetrates the bottom wall of the socket groove 301 and extends into the socket groove 301. That is, external components can achieve electrical connection by inserting into the socket groove 301 and engaging with the first pin 31. Thus, in this embodiment, by directly inserting the connector 30 into the socket 201 on the cover plate 20, the positioning of the connector 30 is facilitated, reducing the probability of the connector 30 being misaligned under force. Furthermore, compared to the traditional structure where the first pin 31 extends out of the cover plate 20 alone, this application can transform the gap formed at the mating point between the traditional first pin 31 and the cover plate 20 into a gap formed at the mating point between the outer periphery of the connector 30 and the cover plate 20. This not only reduces the need for the first pin 31 to mate with other components, lowers the difficulty of mating the first pin 31, and improves installation efficiency, but also prevents moisture and other substances from seeping into the assembly cavity 101 from the gap between the first pin 31 and the cover plate 20, thereby greatly improving safety.

[0074] In one embodiment, the connector 30 is provided with a first fixing part 34, and the cover plate 20 is provided with a first mating part 21 corresponding to the first fixing part 34. The first fixing part 34 and the first mating part 21 surround the periphery of the socket 201. One of the first fixing part 34 and the first mating part 21 is configured as a welding rib, and the other is configured as a welding groove. The welding rib is inserted into the welding groove and welded in place. It is understood that by providing the welding rib and the welding groove, the welding rib can fill the welding groove after heating and melting, achieving welding fixation between the connector 30 and the cover plate 20, while ensuring sealing. This effectively ensures the sealing between the connector 30 and the cover plate 20, preventing moisture and other substances from seeping into the assembly cavity 101 from the gap between the connector 30 and the socket 201, causing corrosion of the components inside the assembly cavity 101. This greatly improves the safety of the coil structure 100 and extends its service life.

[0075] Specifically, the height of the weld bead can be set to be greater than the depth of the weld groove, thereby ensuring that the excess weld bead portion can fill the weld groove after the weld bead melts, further ensuring the reliability of the weld.

[0076] More specifically, in this embodiment, the first fixing part 34 is configured as a welding rib, and the first mating part 21 is configured as a welding groove. That is, the welding rib is provided on the shell 10, and the welding groove is provided on the cover plate 20.

[0077] In another embodiment, such as Figure 6 As shown, a sealing groove 302 is formed between the connector 30 and the cover plate 20. The sealing groove 302 surrounds the periphery of the socket 201. The coil structure 100 also includes a sealing element 50, which is installed in the sealing groove 302 and abuts against the connector 30 and the cover plate 20 respectively. In this way, by installing the sealing element 50 in the sealing groove 302 formed between the connector 30 and the cover plate 20, the sealing between the connector 30 and the cover plate 20 can be guaranteed, preventing moisture and other substances from seeping into the assembly cavity 101 from the gap between the connector 30 and the socket 201, causing corrosion of the components in the assembly cavity 101. This greatly improves the safety of the coil structure 100 and extends its service life.

[0078] In one embodiment, such as Figure 1 , Figure 2 and Figure 6As shown, the housing 10 is provided with a second fixing part 15, and the cover plate 20 is provided with a second mating part 22 corresponding to the second fixing part 15. One of the second fixing part 15 and the second mating part 22 is configured as a welding rib, and the other is configured as a welding groove. The welding rib is inserted into the welding groove and welded in place. That is, when the housing 10 is connected to the cover plate 20, the welding rib can be aligned with the welding groove and inserted first, and then the welding rib can be heated. In this way, after the welding rib melts, it can enter the welding groove, achieving welding fixation between the housing 10 and the cover plate 20 while ensuring sealing.

[0079] Specifically, in this embodiment, the second fixing part 15 is configured as a welding rib, and the second mating part 22 is configured as a welding groove. That is, the welding rib is provided on the housing 10, and the welding groove is provided on the cover plate 20. Similarly, the height of the welding rib can be set to be greater than the depth of the welding groove, thereby ensuring that the excess welding rib portion can fill the welding groove after the welding rib melts, further ensuring the reliability of the welding.

[0080] During the assembly process of the coil structure 100 of this application, the control board 40 can be placed into the assembly cavity 101 first, and the second pin hole 404 on the control board 40 can be aligned with the second pin 70 for pre-positioning. Then, the connection is fixed by soldering to realize the electrical connection between the second pin 70 and the control board 40. After that, the first pin 31 on the connector 30 is aligned and pressed into the first pin hole 403. During this process, the connector 30 is limited by the limiting part 12, and while the connector 30 is restricted from moving, the cover plate 20 is placed at the top opening of the assembly cavity 101 on the housing 10, and cooperates with the connector 30 to realize the overall connection.

[0081] This application also provides an electric valve, which includes the coil structure 100 of any of the above embodiments. The electric valve here can be an automotive electronic expansion valve, specifically applied in an automotive thermal management system. The automotive thermal management system also includes a compressor, a reversing valve, a condenser, and an evaporator. Taking the cooling mode as an example, the high-temperature, high-pressure gaseous refrigerant from the compressor enters the condenser outside the vehicle through the reversing valve, exchanges heat with the outside air, and becomes a medium-temperature, high-pressure liquid refrigerant. After passing through the automotive electronic expansion valve for throttling, it becomes a low-temperature, low-pressure liquid refrigerant. Finally, after absorbing heat from the vehicle interior through the indoor evaporator, it becomes a low-temperature, low-pressure gaseous refrigerant and returns to the compressor, thus completing a cooling cycle.

[0082] The automotive electronic expansion valve achieves throttling through a coil structure 100. For example, when the coil structure 100 is not energized, the valve needle is away from the valve port, the valve port is open, and the refrigerant can flow smoothly through the valve port. When the coil structure 100 is energized, the rotor inside the automotive electronic expansion valve begins to rotate under the drive of the coil structure 100, thereby causing the valve needle to move axially. The magnitude of the magnetic force generated by the coil structure 100 can control the degree of movement of the valve needle, thereby changing the flow area of ​​the valve port and adjusting the refrigerant flow rate at the valve port to match the refrigerant flow rate with the heat load required by the automotive thermal management system.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A coil structure, characterized in that, The device includes a housing (10), a cover plate (20), and a connector (30). The housing (10) has an assembly cavity (101). The cover plate (20) is located at the opening of the assembly cavity (101) and is connected to the housing (10). The connector (30) is separately disposed from the cover plate (20), and the connector (30) is at least partially installed in the assembly cavity (101). The coil structure also includes a limiting part (12), and the plug (30) is limited and engaged with the housing (10) through the limiting part (12).

2. The coil structure according to claim 1, characterized in that, The direction of movement of the connector (30) is defined as the Z direction. The limiting part (12) includes a support plane (102) located in the assembly cavity (101). The support plane (102) and the connector (30) are arranged along the Z direction, and the support plane (102) and the connector (30) abut against each other.

3. The coil structure according to claim 2, characterized in that, The limiting part (12) includes at least two first support columns (121) located on the inner wall of the assembly cavity (101), each of the first support columns (121) extending along the axial direction of the coil structure, and the end face of the first support column (121) near the opening of the assembly cavity (101) forms the support plane (102).

4. The coil structure according to claim 3, characterized in that, The housing (10) includes a stator mounting part (11), a portion of which extends into the assembly cavity (101). The circumferential inner wall of the assembly cavity (101) and the outer wall of the stator mounting part (11) are both provided with the first support column (121).

5. The coil structure according to claim 1, characterized in that, The direction of movement of the connector (30) is defined as the X direction. The limiting part (12) includes a first X limiting surface and a second X limiting surface located in the assembly cavity (101). The first X limiting surface, the second X limiting surface and the connector (30) are arranged along the X direction, and the connector (30) is limited between the first X limiting surface and the second X limiting surface.

6. The coil structure according to claim 5, characterized in that, The first X limiting surface and the second X limiting surface are both inner walls of the assembly cavity (101); the limiting part (12) includes a support plane (102) located on the inner wall of the assembly cavity (101), and the first X limiting surface and the second X limiting surface are both connected to the support plane (102); the direction of movement of the plug (30) is defined as the Z direction, the support plane (102) and the plug (30) are arranged along the Z direction, and the support plane (102) and the plug (30) abut against each other.

7. The coil structure according to claim 6, characterized in that, The outer periphery of the connector (30) is provided with a first protrusion (351) and a second protrusion (352). The bottom surface of the first protrusion (351) and the bottom surface of the second protrusion (352) respectively abut against the corresponding support plane (102). The side of the first protrusion (351) away from the second protrusion (352) abuts against the first X limiting surface, and the side of the second protrusion (352) away from the first protrusion (351) abuts against the second X limiting surface.

8. The coil structure according to claim 1, characterized in that, The direction of movement of the connector (30) is defined as the Y direction. The limiting part (12) includes a first Y limiting surface and a second Y limiting surface located in the assembly cavity (101). The first Y limiting surface, the second Y limiting surface and the connector (30) are arranged along the Y direction, and the connector (30) is limited between the first Y limiting surface and the second Y limiting surface.

9. The coil structure according to claim 8, characterized in that, The first Y-limiting surface and the second Y-limiting surface are both inner walls of the assembly cavity (101); the limiting part (12) includes a support plane (102) located on the inner wall of the assembly cavity (101), and the first Y-limiting surface and the second Y-limiting surface are both connected to the support plane (102); the direction of movement of the plug (30) is defined as the Z direction, the support plane (102) and the plug (30) are arranged along the Z direction, and the support plane (102) and the plug (30) abut against each other.

10. The coil structure according to claim 9, characterized in that, The outer periphery of the connector (30) is provided with a third protrusion (353) and a fourth protrusion (354). The bottom surface of the third protrusion (353) and the bottom surface of the fourth protrusion (354) respectively abut against the corresponding support plane (102). The side of the third protrusion (353) away from the fourth protrusion (354) abuts against the first Y limiting surface. The side of the fourth protrusion (354) away from the third protrusion (353) abuts against the second Y limiting surface.

11. The coil structure according to claim 1, characterized in that, The coil structure also includes an electrical control board (40) and a plurality of second support columns (13). The electrical control board (40) is installed in the assembly cavity (101) and is electrically or signal connected to the plug-in (30). The electrical control board (40) is provided with a plurality of limiting grooves (401). A plurality of second support columns (13) are spaced apart in the assembly cavity (101) and connected to the housing (10), wherein each second support column (13) is located in the corresponding limiting groove (401).

12. The coil structure according to claim 1, characterized in that, The coil structure also includes an electrical control board (40), which is installed in the assembly cavity (101) and has a first pin hole (403). The connector (30) includes a first pin (31), one end of which extends into the first pin hole (403) and is electrically connected to the electronic control board (40).

13. The coil structure according to claim 12, characterized in that, The control board (40) is also provided with a second pin hole (404). The coil structure also includes a motor stator (60) and a second pin (70). The motor stator (60) and the second pin (70) are located in the housing (10). One end of the second pin (70) is electrically connected to the motor stator (60), and the other end is inserted into the second pin hole (404) and electrically connected to the control board (40).

14. The coil structure according to claim 13, characterized in that, Multiple first pin holes (403) and multiple second pin holes (404) are arranged in parallel. One end of the first pin (31) is pressed into the first pin hole (403) and detachably connected to the electronic control board (40). The second pin (70) is inserted into the second pin hole (404) and welded to the electronic control board (40).

15. The coil structure according to claim 12, characterized in that, The connector (30) also includes a main body (35), which is an integral injection molded structure, and the first pin (31) is injection molded to the main body (35).

16. The coil structure according to claim 15, characterized in that, The connector (30) also includes a plurality of reinforcing ribs (33), which are spaced apart on the main body (35).

17. The coil structure according to claim 1, characterized in that, The coil structure also includes an electrical control board (40), which is installed in the assembly cavity (101). The electrical control board (40) has a first pin hole (403) and a guide hole (402). The connector (30) includes a first pin (31) and a guide post (32). One end of the first pin (31) extends into the first pin hole (403) and is electrically connected to the electronic control board (40). The guide post (32) extends into the guide hole (402).

18. The coil structure according to claim 17, characterized in that, The bottom wall of the assembly cavity (101) is provided with a groove (103), the end of the first pin (31) extending out of the first pin hole (403) does not contact the bottom surface of the groove (103), and the distance between the end of the guide post (32) extending out of the guide hole (402) and the bottom surface of the groove (103) is greater than or equal to zero.

19. The coil structure according to claim 17, characterized in that, The height of the guide post (32) extending from the end of the guide hole (402) to the electrical control board (40) is higher than the height of the first pin (31) extending from the end of the first pin hole (403) to the electrical control board (40).

20. The coil structure according to claim 19, characterized in that, The height of the guide post (32) extending from the end of the guide hole (402) to the electrical control board (40) is 2mm to 5mm higher than the height of the first pin (31) extending from the end of the first pin hole (403) to the electrical control board (40).

21. The coil structure according to any one of claims 1-20, characterized in that, The cover plate (20) has an opening (201), and part of the plug (30) extends out of the assembly cavity (101) through the opening (201), and the plug (30) and the cover plate (20) are sealed together; The connector (30) includes a first pin (31) and a socket groove (301). One end of the first pin (31) is located in the assembly cavity (101) and is used to connect with the electronic control board (40). The other end passes through the bottom wall of the socket groove (301) and extends into the socket groove (301).

22. The coil structure according to claim 21, characterized in that, The connector (30) is provided with a first fixing part (34), and the cover plate (20) is provided with a first mating part (21) corresponding to the first fixing part (34). The first fixing part (34) and the first mating part (21) surround the periphery of the socket (201). One of the first fixing part (34) and the first mating part (21) is set as a welding rib, and the other is set as a welding groove. The welding rib is inserted into the welding groove and welded and fixed. Alternatively, a sealing groove (302) is formed between the plug (30) and the cover plate (20), the sealing groove (302) is arranged around the periphery of the plug (201), and the coil structure also includes a sealing element (50), the sealing element (50) is installed in the sealing groove (302) and abuts against the plug (30) and the cover plate (20) respectively.

23. An electric valve, characterized in that, Includes the coil structure as described in any one of claims 1-22.

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