A coil frame, coil components, and valve device.

Abstract

This application provides a coil frame, coil component, and valve device, which can improve the sealing performance and insulation properties of injection molding. The coil frame includes a cylindrical structure, a first flange-shaped portion, and a second flange-shaped portion. One axial end of the cylindrical structure extends radially outward to form the first flange-shaped portion, and the other axial end extends radially outward to form the second flange-shaped portion. The coil frame also includes a pin retaining portion. The first flange-shaped portion includes a first flange-shaped portion and a second flange-shaped portion connected circumferentially. The first flange-shaped portion is connected to the pin retaining portion. The first flange-shaped portion has a first waterproof rib protruding axially. The second flange-shaped portion has a first groove portion, and the outer wall of the first groove portion forms a second waterproof rib. The first flange-shaped portion also has a third waterproof rib, and the second waterproof rib is transitionally connected to the first waterproof rib through the third waterproof rib.

Description

Technical Field

[0001] This application relates to the field of valve technology, specifically to a coil frame, coil component, and valve device. Background Technology

[0002] The electronic expansion valve includes a coil component, which includes a coil frame for winding a coil coil of the coil component. The coil component also includes a pin, which is electrically connected to the winding coil. The coil frame has a pin retainer for positioning the pin. During the manufacturing of the coil component, the coil frame, winding coil, pin, etc., are injection molded as inserts, and the resulting injection-molded encapsulation layer covers the outside of the coil frame.

[0003] To ensure a good seal, waterproof ribs are incorporated into the coil frame. During injection molding, these ribs are embedded in the resin material to create a sealing barrier. However, the coil frame also requires a pin retainer. The placement of this pin retainer, separate from the waterproof ribs in other locations, results in insufficient sealing and poor insulation. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this application is to provide a coil bobbin, coil components, and valve device that can improve the sealing performance of injection molding and enhance insulation properties.

[0005] The coil bobbin provided in this application includes a cylindrical structure, a first flange-shaped portion, and a second flange-shaped portion. One axial end of the cylindrical structure extends radially outward to form the first flange-shaped portion, and the other axial end extends radially outward to form the second flange-shaped portion. The coil bobbin also includes a pin retaining portion. The first flange-shaped portion includes a first portion and a second portion of the flange-shaped portion that are circumferentially connected. The first portion of the flange-shaped portion is connected to the pin retaining portion.

[0006] The first portion of the first blade-shaped part is provided with a first waterproof rib protruding along the axial direction. The second portion of the first blade-shaped part has a first groove portion. The outer wall of the first groove portion is formed as a second waterproof rib. The first blade-shaped part also has a third waterproof rib. One end of the second waterproof rib and one end of the first waterproof rib are connected by a transitional connection through the third waterproof rib. The other end of the second waterproof rib is connected by a transitional connection between the second waterproof rib and the other end of the first waterproof rib through another third waterproof rib.

[0007] The coil bobbin in this application is provided with a third waterproof rib. The third waterproof rib can smoothly connect the second waterproof rib and the first waterproof rib that protrudes from the first edge-shaped part, thereby forming a complete annular waterproof rib structure. The waterproof rib is not interrupted. During injection molding, the high-temperature resin material fuses the waterproof rib into one piece during the injection filling process, which is conducive to completely blocking the water passage, thereby improving the waterproof sealing performance of the product and improving the insulation reliability of the product. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of the coil component of the valve device in one embodiment of this application;

[0009] Figure 2 for Figure 1 A schematic diagram of the structure of the coil frame;

[0010] Figure 3 for Figure 2 A magnified view of part A in the middle;

[0011] Figure 4 for Figure 2 Top view of the intermediate coil component;

[0012] Figure 5 for Figure 4 Enlarged diagram of part B in the middle;

[0013] Figure 6 for Figure 2 A structural schematic diagram of a partial location of the first groove in the middle;

[0014] Figure 7 for Figure 2 A cross-sectional view of the intermediate coil component along the axial direction;

[0015] Figure 8 for Figure 7 Enlarged schematic diagram of part C in the middle;

[0016] Figure 9 for Figure 7 A magnified view of part D in the middle;

[0017] Figure 10 for Figure 4 A cross-sectional view along the EE direction;

[0018] Figure 11 for Figure 1 A magnified view of part F in the middle;

[0019] Figure 12 for Figure 1 Enlarged schematic diagram of part G in the middle;

[0020] Figure 13 for Figure 7 Enlarged schematic diagram of part H in the middle.

[0021] The annotations in the figure are explained as follows:

[0022] 100 - Coil component;

[0023] 100-coil frame;

[0024] 10-Cylindrical structure;

[0025] 11-First serrated portion; 111-Straight portion; 1111-First waterproof rib; 1112-Third waterproof rib; 111a-Second groove portion; 112-Arc-shaped ring portion; 1121-Second waterproof rib; 1122-Slope surface; 112a-First groove portion; 112a1-Arc-shaped groove portion; 112a2-Transition groove portion; 112a1-Outer wall surface of the groove; 112a2-Inner wall surface of the groove; 112a21-First wall surface; 112a22-Second wall surface;

[0026] 12-Second edge-shaped portion; 121-Fourth waterproof rib; 12a-Third groove portion;

[0027] 13-Pin retaining part;

[0028] 200-encapsulation layer;

[0029] 300-coil winding;

[0030] 400 - Pin assembly;

[0031] 500-Magnetic Conductor Plate. Detailed Implementation

[0032] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] In the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0034] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of the coil component 1000 of the valve device in one embodiment of this application.

[0035] The valve device in this embodiment includes a coil component 1000 and a valve body component (not shown in the figure). Under the excitation of the coil component 1000, the valve core in the valve body component can be driven to move, thereby adjusting the flow rate or switching the flow path. The valve device can be an electronic expansion valve, an electric valve, etc., and this embodiment does not impose specific limitations. The valve device can be applied to refrigeration and heating devices such as air conditioners, heat pump water heaters, chillers, vending machines, ice makers, supermarket freezers, and refrigerators. Figure 1 In the coil component 1000, there are a coil bobbin 100, a coil winding 300 wound around the coil bobbin 100, an encapsulation layer 200, a magnetic plate 500, and a pin component 400.

[0036] Please continue to refer to this. Figure 2 , Figure 2 for Figure 1 A schematic diagram of the structure of the middle coil frame 100.

[0037] In this embodiment, the coil frame 100 includes a cylindrical structure 10, a first flange-shaped portion 11, and a second flange-shaped portion 12. One axial end of the cylindrical structure 10 has a first flange-shaped portion 11 extending radially outward, with the radial direction perpendicular to the axial direction. The other axial end of the cylindrical structure 10 extends radially outward to form the second flange-shaped portion 12. That is, the axial cross-section of the coil frame 100 is I-shaped (e.g., ...). Figure 7 As shown), the cylindrical structure 10 can be a cylindrical structure, the second blade-shaped portion 12 is a circular ring structure, and the first blade-shaped portion 11 is approximately a circular ring structure. Figure 2 As shown, the coil frame 100 also includes a pin holding portion 13. Figure 2 Three pin holding portions 13 are illustrated. A portion of the first flange-shaped portion 11 extends radially outward to form the pin holding portion 13. Because of the need to provide the pin holding portion 13, unlike the annular second flange-shaped portion 12, the first flange-shaped portion 11 is not a complete annulus. The first flange-shaped portion 11 includes a first flange-shaped portion 111 and a second flange-shaped portion 112 connected circumferentially. The first flange-shaped portion 111 is a straight portion, and the second flange-shaped portion 112 is an arc-shaped ring portion with a large semi-circular arc structure. The first flange-shaped portion 111 and the second flange-shaped portion 112 are connected to form a closed ring. Multiple pin holding portions 13 extend radially outward from the first flange-shaped portion 111. These multiple pin holding portions 13 can be arranged as follows... Figure 2 As shown, the pins are arranged in a straight line. The pin holding part 13 is provided with a plug hole. Multiple pins of the pin part 400 can be inserted into their respective plug holes to position the pins.

[0038] In this embodiment, "outer" and "inner" refer to the axis L of the cylindrical structure 10 of the coil frame 100 (shown in...). Figure 7 Using ) as a reference, the direction closer to axis L is inside, and the opposite direction is outside.

[0039] Please continue to combine Figures 3 to 5 understand, Figure 3 for Figure 2 A magnified view of part A in the middle; Figure 4 for Figure 2 Top view of the intermediate coil component 1000; Figure 5 for Figure 4 Enlarged diagram of part B in the middle.

[0040] In this embodiment, the first edge-shaped portion 11 corresponding to the pin holding portion 13 is provided with a first waterproof rib 1111 protruding axially. The portion corresponding to the pin holding portion 13, that is, the pin holding portion 13, extends radially outward from this portion. This portion can also be understood as the root of the plurality of pin holding portions 13. Specifically, in this embodiment, the first waterproof rib 1111 is provided in the first edge-shaped portion 111 of the aforementioned first edge-shaped portion 11. Corresponding to the first edge-shaped portion 111, which is specifically a straight portion, the first waterproof rib 1111 is a straight rib. The first waterproof rib 1111 is approximately parallel to the first edge-shaped portion 111 and is also parallel to the arrangement direction of the plurality of pin holding portions 13.

[0041] Can continue to combine Figures 6 to 8 understand, Figure 6 for Figure 2 A schematic diagram of a partial location of the first groove portion 112a; Figure 7 for Figure 2 A cross-sectional view of the intermediate coil component 1000 along the axial direction; Figure 8 for Figure 7 Enlarged diagram of part C in the middle.

[0042] In this embodiment, the second part 112 of the first edge-shaped portion 11 also has a first groove portion 112a. That is, the first groove portion 112a is not a closed annular groove structure, but includes an arc-shaped groove portion, and the first groove portion 112a is arranged around the inner hole of the coil frame 100. The first groove portion 112a includes an outer groove wall surface 112a1, an inner groove wall surface 112a2, and a bottom groove wall surface 112a3. The outer groove wall surface 112a1 and the inner groove wall surface 112a2 are arranged opposite to each other, and the outer groove wall surface 112a1, the inner groove wall surface 112a2, and the bottom groove wall surface 112a3 enclose and define the cavity of the first groove portion 112a. Wherein, the outer wall surface 112a1 of the first groove portion 112a forms the inner surface of the second waterproof rib 1121, that is, the second waterproof rib 1121 surrounds the outer side of the groove cavity, and the outer wall of the first groove portion 112 forms the second waterproof rib 1121. The second waterproof rib 1121 is correspondingly an arc-shaped rib, so as to better surround the coil frame 100.

[0043] like Figure 7As shown, since the first waterproof rib 1111 protrudes from the surface of the first flange-shaped portion 11, and this surface is axially aligned with the end face of the first flange-shaped portion 11 and away from the second flange-shaped portion 12, while the second waterproof rib 1121 is formed by recessing the surface of the first flange-shaped portion 11, the second waterproof rib 1121 does not protrude from the surface of the first flange-shaped portion 11. Thus, axially, the second waterproof rib 1121 and the first waterproof rib 1111 have the following... Figure 7 The spacing h is shown.

[0044] At this point, the first edge-shaped portion 11 in this embodiment also has a third waterproof rib 1112. At least a portion of the third waterproof rib 1112 protrudes from the first edge-shaped portion 11. The third waterproof rib 1112 can be mainly disposed in the first portion 111 of the edge-shaped portion. One end of the second waterproof rib 1121 and one end of the first waterproof rib 1111 are transitionally connected through one third waterproof rib 1112. The other end of the second waterproof rib 1121 is transitionally connected to the other end of the first waterproof rib 1111 through another third waterproof rib 1112. The transition connection is a smooth and gradual connection. That is, the second waterproof rib 1121 and the first waterproof rib 1111, which have a height difference in the axial direction, are transitionally connected through the third waterproof rib 1112, so that the first waterproof rib 1111, the second waterproof rib 1121, and the two third waterproof ribs 1112 form a complete and continuous waterproof rib. Obviously, the third waterproof rib 1112 is a rib structure with a gradually changing height in the axial direction. The end of the third waterproof rib 1112 furthest from the first blade-shaped portion 11 can be defined as the top of the third waterproof rib 1112, such as... Figure 7 As shown, the first edge-shaped portion 11 and the second edge-shaped portion 12 are arranged vertically. The axial height of the top of the third waterproof rib 1112 gradually decreases from the end closest to the first waterproof rib 1111 towards the end closest to the second waterproof rib 1121, thus transitioning between the first and second waterproof ribs 1111 and 1121. In other words, the axial dimension of the third waterproof rib 1112 gradually decreases from the end closest to the first waterproof rib 1111 towards the end closest to the second waterproof rib 1121. At this time, the axial height difference between the end of the third waterproof rib 1112 closest to the first waterproof rib 111 and the end of the third waterproof rib 1112 closest to the second waterproof rib 1121 is also h.

[0045] As can be seen, this embodiment is provided with three types of waterproof ribs. The third waterproof rib 1112 smoothly connects the second waterproof rib 1121 and the relatively protruding first waterproof rib 1111, thereby forming a complete annular waterproof rib structure. The waterproof ribs are not interrupted. During injection molding, the high-temperature resin material fuses the waterproof ribs into one piece during the injection filling process, which is conducive to completely blocking the water passage, thereby improving the waterproof sealing performance of the product and improving the insulation reliability of the product.

[0046] Please continue to refer to this. Figure 8 and on the combination Figure 9 and Figure 10 understand, Figure 9 for Figure 7 A magnified view of part D in the middle; Figure 10 for Figure 4 A cross-sectional view along the EE direction.

[0047] In this embodiment, the first waterproof rib 1111, the second waterproof rib 1121, and the third waterproof rib 1112 are all pointed ribs, meaning that the tops of the three types of waterproof ribs are all pointed structures. During the injection molding process, the pointed structure facilitates better bonding with the high-temperature resin material, meaning that after injection molding, the resin material and the waterproof rib can adhere well, reducing the possibility of voids and further ensuring the blocking effect on moisture pathways.

[0048] like Figure 2 , 9 As shown, and in combination Figure 11 understand, Figure 11 for Figure 1 A magnified view of part F in the middle.

[0049] In this embodiment, the portions corresponding to the first edge-shaped portion 11 and the pin holding portion 13 are provided with a plurality of first waterproof ribs 1111 protruding axially. Specifically, the plurality of first waterproof ribs 1111 are arranged parallel to each other in the first portion 111 of the edge-shaped portion. Among them, the innermost first waterproof rib 1111 and the second waterproof rib 1121 are connected by a third waterproof rib 1112. Since the pin holding portion 13 is used to connect the pin, the sealing requirements of the portions corresponding to the first edge-shaped portion 11 and the pin holding portion 13 can be more stringent. Providing a plurality of first waterproof ribs 1111 is equivalent to providing multiple seals for the pin, thereby further improving the sealing and waterproof performance near the pin holding portion 13.

[0050] Please continue to combine Figure 6 , 8 Understandably, in this embodiment, the outer edge of the first blade-shaped portion 11 has a slope 1122, and the portion of the slope 1122 is the outer surface of the second waterproof rib 1121. Figure 8 The upper part of the slope 1122 is the outer surface of the second waterproof reinforcement 1121. In specific processing, the slope 1122 can be cut to easily form the second waterproof reinforcement 1121 with a sharp corner structure in the form of the slope 112.

[0051] Additionally, you can continue to refer to... Figure 6 , 8 and combined Figure 12 understand, Figure 12 for Figure 1 Enlarged schematic diagram of part G in the middle.

[0052] In the direction away from the first flange-shaped portion 11, the axial height of the outer wall corresponding to the first groove portion 112a is lower than the height of the corresponding inner wall. Thus, the outer wall (i.e., the second waterproof rib 1121) and the inner wall corresponding to the first groove portion 112a have an axial height difference H. Figure 12 As shown, the magnetic guide plate 500 is attached to the entire axial end face of the first flange 11 and the entire axial end face of the second flange 12, resulting in better magnetic conductivity. This creates an axial height difference H between the outer and inner side walls of the first groove 112a, allowing for a gap to allow more resin material to flow into the first groove 112a, thus ensuring injection molding strength. At this time, the second waterproof rib 1121 is recessed relative to the surface of the first flange 11, further increasing the axial distance h between the second waterproof rib 1121 and the first waterproof rib 1111. The length of the third waterproof rib 1112 from one end to the other can be set to be relatively longer, allowing for a smoother connection between the first waterproof rib 1111 and the second waterproof rib 1121.

[0053] Let's look again. Figure 6 and Figure 8 In this embodiment, the inner wall 112a2 of the first groove portion 112a includes a first wall surface 112a21 and a second wall surface 112a22. The first wall surface 112a21 is in contact with the bottom wall surface 112a3 of the groove, and the first wall surface 112a21 is an inclined surface, tilted relative to the axial direction. This arrangement facilitates the resin material to fill the first groove portion 112a more smoothly and increases the strength of the first edge-shaped portion 11 at the position of the first groove portion 112a.

[0054] Please continue to refer to this. Figure 13 , Figure 13 for Figure 7 Enlarged schematic diagram of part H in the middle.

[0055] In this embodiment, the second edge-shaped portion 12 is provided with a fourth waterproof rib 121. The second edge-shaped portion 12 does not need to be provided with a pin retaining portion 13, so the fourth waterproof rib 121 can be a closed ring structure. The structural form of the fourth waterproof rib 121 is the same as that of the second waterproof rib 1121, which is formed by the recess of the second edge-shaped portion 12. Specifically, the second edge-shaped portion 12 has a third groove portion 12a, and the second waterproof rib 1121 surrounds the outside of the groove cavity of the third groove portion 12a. The outer edge of the second edge-shaped portion 12 also has a slope to form a fourth waterproof rib with a pointed corner structure. The outer wall surface and the inner wall surface of the groove of the third groove portion 12a have a height difference in the axial direction. The specific details can be understood by referring to the second waterproof rib 1121, and will not be repeated here.

[0056] In addition, let's look at... Figure 3In this embodiment, the first edge-shaped portion 11 is also provided with a second groove portion 111a. The second groove portion 111a is also roughly located at the position of the first part 111 of the edge-shaped portion. The second groove portion 111a is correspondingly set as a straight groove. The groove cavity of the second groove portion 111a can be connected to the two ends of the groove cavity of the first groove portion 112a to form an annular groove portion. During injection molding, the strength of the injection molding bond can be strengthened, and an annular seal can be established to improve the sealing effect.

[0057] Figure 3 In the first groove portion 112a, there are an arc-shaped groove portion 112a1 and a transition groove portion 112a2. The transition groove portion 112a2 is closer to the first waterproof rib 1111 than the arc-shaped groove portion 112a1. The arc-shaped groove portion 112a1 is connected to the second groove portion 111a through the transition groove portion 112a2. Specifically, the outer wall of the arc-shaped groove portion 112a1 is the second waterproof rib 1112, and part of the outer wall of the transition groove portion 112a2 can be the third waterproof rib 1112. The transition groove portion 112a2 is recessed relative to the surface of the first jaw-shaped portion 11, while the third waterproof rib 1112 is higher than the surface of the first jaw-shaped portion 11 in the axial direction. Unlike the arc-shaped groove portion 112a1, the outer wall of the transition groove portion 112a2 is higher than the inner wall of the groove. It is understandable that the transition groove 112a2 and the third waterproof rib 1112 can also be provided at intervals, with the transition groove 112a2 located inside the third waterproof rib 1112.

[0058] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A coil frame, characterized in that, The coil frame (100) includes a cylindrical structure (10), a first serrated portion (11), and a second serrated portion (12). One end of the cylindrical structure (10) extends radially outward to form the first serrated portion (11), and the other end extends radially outward to form the second serrated portion (12). The coil frame (100) also includes a pin holding portion (13). The first serrated portion (11) includes a first serrated portion (111) and a second serrated portion (112) connected circumferentially. The first serrated portion (111) is connected to the pin holding portion (13). The first part (111) of the first edge-shaped portion (11) is provided with a first waterproof rib (1111) protruding along the axial direction. The second part (112) of the first edge-shaped portion (11) has a first groove (112a). The outer wall of the first groove (112a) forms a second waterproof rib (1121). The first edge-shaped portion (11) also has a third waterproof rib (1112). One end of the second waterproof rib (1121) and one end of the first waterproof rib (1111) are connected by a third waterproof rib (1112). The other end of the second waterproof rib (1121) is connected by another third waterproof rib (1112) and the other end of the first waterproof rib (1111).

2. The coil frame according to claim 1, characterized in that, The first waterproof reinforcement bar (1111), the second waterproof reinforcement bar (1121), and the third waterproof reinforcement bar (1112) are all pointed reinforcement bars.

3. The coil frame according to claim 2, characterized in that, The first part (111) of the blade-shaped portion is a straight portion, and the first waterproof rib (1111) is a straight rib; and / or, the second part (112) of the blade-shaped portion is an arc-shaped ring portion, the first groove portion (112a) includes an arc-shaped groove portion (112a1), the outer wall of the arc-shaped groove portion (112a1) is the second waterproof rib (1121), and the second waterproof rib (1121) is an arc-shaped rib.

4. The coil frame according to claim 1, characterized in that, The first part (111) of the blade-shaped portion is provided with a plurality of first waterproof ribs (1111) protruding along the axial direction, and the innermost first waterproof rib (1111) and the second waterproof rib (1121) are connected by the third waterproof rib (1112).

5. The coil frame according to any one of claims 1-4, characterized in that, The outer edge of the first blade-shaped part (11) has a slope (1122), and part of the slope (1122) is the outer surface of the second waterproof reinforcement (1121).

6. The coil frame according to claim 5, characterized in that, In the direction away from the first blade-shaped portion (11), the axial height of the second waterproof rib (1121) is lower than the height of the inner wall of the first groove portion (112a).

7. The coil frame according to claim 5, characterized in that, The inner wall surface (112a2) of the first groove portion (112a) includes an inclined surface, which is in contact with the bottom wall surface (112a3) of the first groove portion (112a).

8. The coil frame according to any one of claims 1-4, characterized in that, The first part (111) of the blade-shaped portion is provided with a second groove (111a). The first groove (112a) includes an arc-shaped groove (112a1) and a transition groove (112a2). The transition groove (112a2) is closer to the first waterproof rib (1111) than the arc-shaped groove (112a1). The arc-shaped groove (112a1) is connected to the second groove (111a) through the transition groove (112a2). The second groove (111a) and the first groove (112a) are connected to form an annular groove.

9. The coil frame according to claim 8, characterized in that, The outer wall portion of the transition groove (112a2) is the third waterproof rib (1112), or the transition groove (112a2) and the third waterproof rib (1112) are spaced apart.

10. The coil frame according to any one of claims 1-4, characterized in that, The axial dimension of the third waterproof reinforcement (1112) gradually decreases from the end near the first waterproof reinforcement (1111) to the end of the third waterproof reinforcement (1112) near the second waterproof reinforcement (1121).

11. The coil frame according to claim 10, characterized in that, The height difference in the axial dimension between the second waterproof reinforcement (1121) and the first waterproof reinforcement (1111) is h, and the height difference in the axial dimension between the end of the third waterproof reinforcement (1112) near the first waterproof reinforcement (111) and the end of the third waterproof reinforcement (1112) near the second waterproof reinforcement (1121) is h.

12. A coil component, characterized in that, It includes a coil frame (100) and a winding coil (300) wound around the coil frame (100), wherein the coil frame (100) is the coil frame (100) according to any one of claims 1-8.

13. A valve device, characterized in that, It includes a coil component (1000) and a valve body component, wherein the coil component is the coil component (1000) as described in claim 12.

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