Coil component and electronic expansion valve

Abstract

A coil component, comprising a stator assembly (10) and a clamping member (20), wherein the clamping member comprises clamping bodies (21) and clamping sheets (22), the ends of the clamping bodies are fixedly connected to the stator assembly, and the clamping sheets are used for clamping a valve body (30) penetrating through the stator assembly, so as to limit the relative positions of the valve body and the coil component. The coil component uses clamping by means of the clamping member to fix the relative positions of the stator assembly and the valve body, such that the connecting structure of the valve body and the stator assembly is simplified, thereby preventing the fixing of the coil component and the valve body being only achievable by using a plurality of fixing frame structures, simplifying the machining structure and process, and reducing the product cost. Also disclosed is an electronic expansion valve comprising the coil component.

Description

Coil components and electronic expansion valves

[0001] This application claims priority to a patent application filed with the State Intellectual Property Office of China on September 28, 2023, with application number 202322659633.0 and title “Coil Component and Electronic Expansion Valve.” Technical Field

[0002] The present application relates to the technical field of electronic expansion valves, and in particular to a coil component and an electronic expansion valve. Background Art

[0003] In electronic expansion valves, after the valve body passes through the stator assembly, the relative position of the two must be fixed to prevent them from separating. Existing techniques typically utilize a coil holder and a valve body holder. The coil holder is fixedly connected to the stator assembly, welded to the valve body, and then secured by snap-fitting the coil holder and valve body holder. This secures the valve body and stator assembly. The multiple holder structures required to secure the coil and valve body complicate the manufacturing process and increase product costs.

[0004] Application Contents

[0005] The present application provides a coil component and an electronic expansion valve to solve the problems of complex processing procedures and high product costs in the fixed connection structure of the stator assembly and the valve body in the prior art.

[0006] In order to solve the above problems, according to one aspect of the present application, the present application provides a coil component, including: a stator assembly; a clamping piece, the clamping piece includes a clamping body and a card; wherein the end of the clamping body is fixedly connected to the stator assembly, and the card is used to clamp with the valve body passing through the stator assembly to limit the relative position of the valve body and the coil component.

[0007] Furthermore, a portion of the snap-on body is processed into a card, one edge of the card is connected to the snap-on body, and a processing gap is formed between the other edges of the card and the snap-on body.

[0008] Furthermore, the card has a convex bulge, the valve body includes a sleeve, the outer wall of the sleeve has a groove, and the convex bulge is used to be clamped with the groove of the sleeve.

[0009] Furthermore, one end of the card close to the stator assembly is connected to the card body, and one end of the card away from the stator assembly is spaced from the card body; or, one end of the card away from the stator assembly is connected to the card body, and one end of the card close to the stator assembly is spaced from the card body.

[0010] Furthermore, the clamping piece is in an X-shape, both ends of the clamping body are fixedly connected to the stator assembly, the clamping body is provided with two opposite cards, and the valve body is located between the two cards.

[0011] Furthermore, the stator assembly includes a stator shell and an enameled wire arranged in the stator shell. The stator shell and the clamping piece are both made of metal, and the clamping body and the stator shell are welded or riveted.

[0012] Furthermore, the end of the clamping body has a positioning hole or a positioning groove, the outer wall of the stator housing has a positioning boss, the positioning boss passes through the positioning hole or the positioning groove, and the positioning boss and the clamping body are welded or riveted.

[0013] Alternatively, the stator assembly includes a stator shell and an injection-molded encapsulation layer, the encapsulation layer encapsulates at least a portion of the stator shell, and the end of the clamping body is fixedly connected to the encapsulation layer.

[0014] Furthermore, the card body includes a first plate body, a second plate body, a third plate body and a fourth plate body that are bent in sequence, the card is located on the fourth plate body, and the first plate body has a positioning hole or a positioning groove; the encapsulation layer encapsulates a part of the outer circumferential surface of the stator shell, and the end face of the encapsulation layer has a positioning boss, the positioning boss passes through the positioning hole or positioning groove, and the positioning boss and the first plate body are welded.

[0015] Furthermore, the stator assembly includes a stator shell and an encapsulation layer, the stator shell includes an upper stator shell and a lower stator shell connected to each other, the encapsulation layer encapsulates the connection between the upper stator shell and the lower stator shell, and encapsulates a portion of the outer periphery of the stator shell connected to the connection, and the encapsulation layer does not encapsulate the end faces of the upper stator shell and the lower stator shell.

[0016] Alternatively, the stator assembly includes a stator shell, an encapsulation layer and a waterproof cover, the encapsulation layer encapsulates a portion of the outer circumferential surface of the stator shell, the waterproof cover covers the upper part of the stator shell and is sealed to the upper end of the encapsulation layer, the clamping part is located in the area surrounded by the waterproof cover, and the end of the clamping body is fixedly connected to the waterproof cover.

[0017] Furthermore, the waterproof cover has a positioning boss on one side facing the end face of the stator housing, the end of the clamping body has a positioning hole or positioning groove, the positioning boss passes through the positioning hole or positioning groove, and the positioning boss and the clamping body are welded.

[0018] Furthermore, the stator assembly also includes a waterproof base, which covers the lower part of the stator shell and is sealed to the lower end of the encapsulation layer. The valve body passes through the waterproof base, and the waterproof base and the waterproof cover are both injection molded.

[0019] According to another aspect of the present application, an electronic expansion valve is provided. The electronic expansion valve includes a valve body and the above-mentioned coil component. The valve body passes through the stator assembly and is clamped to the clamping member.

[0020] By applying the technical solution of the present application, a coil component is provided, comprising a stator assembly and a clamping member, wherein the clamping member comprises a clamping body and a card; wherein the end of the clamping body is fixedly connected to the stator assembly, and the card is used to clamp to a valve body passing through the stator assembly to define the relative position of the valve body and the coil component. In this solution, the clamping body in the clamping member is fixedly connected to the stator assembly, and the card in the clamping member is clamped to the valve body, that is, the relative position of the stator assembly and the valve body is fixed by clamping with a single clamping member. This connection method simplifies the connection structure of the valve body and the stator assembly, avoids the use of multiple fixing frame structures to achieve the fixation of the coil component and the valve body, simplifies the processing structure and process, and reduces product costs.

[0021] Furthermore, one edge of the card in the connector remains connected to the connector body, while a clearance is machined between the other edge and the connector body. This creates a cantilever structure, making it more easily deformable. This allows for minimal force when snapping the card into the valve body, which passes through the stator assembly. This solution improves operational convenience and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0023] FIG1 shows a schematic structural diagram of a coil component provided in Example 1 of the present application;

[0024] FIG2 shows a schematic diagram of the clip in FIG1 ;

[0025] FIG3 shows a schematic diagram of a clamping member provided in Example 2 of the present application;

[0026] FIG4 shows a schematic diagram of a clamping member provided in Example 3 of the present application;

[0027] FIG5 shows a schematic diagram of a clamping member provided in the fourth embodiment of the present application;

[0028] FIG6 shows a schematic diagram of the coordination between the coil component and the valve body in FIG1 ;

[0029] FIG7 shows a schematic diagram of the stator housing in FIG6 ;

[0030] FIG8 shows a schematic diagram of a coil component provided in Example 5 of the present application;

[0031] FIG9 shows a schematic diagram of the waterproof cover in FIG8 ;

[0032] FIG10 shows a schematic diagram of the coordination of the coil component and the valve body provided in Example 6 of the present application;

[0033] FIG11 shows a cross-sectional view of FIG10;

[0034] FIG12 shows a schematic diagram of the clip in FIG11 ;

[0035] FIG. 13 shows a schematic diagram of the stator assembly in FIG. 11 .

[0036] The above drawings include the following reference numerals:

[0037] 10. Stator assembly; 11. Stator housing; 111. Positioning boss; 12. Enameled wire; 13. Encapsulation layer; 14. Waterproof cover; 15. Waterproof base; 20. Snap-fit ​​part; 21. Snap-fit ​​body; 211. Positioning hole; 212. Positioning groove; 22. Card; 221. Bump; 30. Valve body. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0039] As shown in Figures 1 to 13, the present application provides a coil component, including a stator assembly 10 and a clamping member 20, the clamping member 20 includes a clamping body 21 and a card 22; wherein, the end of the clamping body 21 is fixedly connected to the stator assembly 10, and the card 22 is used to clamp with the valve body 30 passing through the stator assembly 10 to limit the relative position of the valve body 30 and the coil component.

[0040] In this solution, the clamping body 21 in the clamping member 20 is fixedly connected to the stator assembly 10, and the card 22 in the clamping member 20 is clamped to the valve body 30, that is, the relative position of the stator assembly 10 and the valve body 30 is fixed by clamping a clamping member 20. This connection method simplifies the connection structure of the valve body 30 and the stator assembly 10, avoids the use of multiple fixing frame structures to achieve the fixation of the coil component and the valve body 30, simplifies the processing structure and process, and reduces product costs.

[0041] As shown in FIG. 2 , in this solution, the clip 20 can be formed by bending a sheet.

[0042] Alternatively, in some embodiments, a portion of the snap-on body 21 is processed into the card 22 , one edge of the card 22 remains connected to the snap-on body 21 , and a processing gap exists between the other edges of the card 22 and the snap-on body 21 .

[0043] As shown in Figures 3 to 5, one edge of the card 22 in the clamping member 20 remains connected to the clamping body 21, while a clearance is machined between the other edges of the card 22 and the clamping body 21. This creates a cantilever beam structure, making it more easily deformable. This allows the card 22 to be clamped to the valve body 30 passing through the stator assembly 10 with less force than in the prior art. This solution improves operational convenience and installation efficiency. In this solution, the clamping member 20 can be configured as an integrated structure.

[0044] As shown in Figures 3 to 5, the latch 22 has a protrusion 221. The valve body 30 includes a sleeve, the outer wall of which has a groove. The protrusion 221 is designed to engage with the groove of the sleeve. This engagement of the protrusion 221 with the groove ensures a secure connection between the valve body 30 and the coil assembly. Furthermore, the valve body 30 includes a valve cover, which is fixed to one end of the sleeve. The valve cover and sleeve can be integral or separate.

[0045] The end of the card 22 closest to the stator assembly 10 is connected to the clamping body 21, while the end of the card 22 away from the stator assembly 10 is spaced apart from the clamping body 21. Alternatively, the end of the card 22 away from the stator assembly 10 is connected to the clamping body 21, while the end of the card 22 closer to the stator assembly 10 is spaced apart from the clamping body 21. In both of the above methods, the card 22 can be a cantilever structure.

[0046] Specifically, the clamping member 20 is in the shape of an "X" (cross), with both ends of the clamping body 21 fixedly connected to the stator assembly 10. The clamping body 21 has two opposing clips 22, and the valve body 30 is located between the two clips 22. By providing two opposing clips 22 to jointly engage with the valve body 30, the limiting effect of the valve body 30 is improved.

[0047] In this embodiment, the stator assembly 10 includes a stator housing 11 and an enameled wire 12 disposed within the stator housing 11. The stator housing 11 and the clamping member 20 are both made of metal. As shown in Figures 6 and 7, in some embodiments, the clamping body 21 and the stator housing 11 are welded or riveted.

[0048] For example, the end of the clamping body 21 has a positioning hole 211 or a positioning groove 212, and the outer wall of the stator housing 11 has a positioning boss 111. The positioning boss 111 passes through the positioning hole 211 or the positioning groove 212. The positioning boss 111 and the clamping body 21 are welded or riveted together. The connection between the positioning boss 111 on the stator housing 11 and the clamping body 21 achieves the fixation of the clamping member 20.

[0049] As shown in Figures 10 to 13, in some embodiments, the stator assembly 10 includes a stator housing 11 and an injection-molded encapsulation layer 13. The encapsulation layer 13 encapsulates at least a portion of the stator housing 11, and the end of the clamping body 21 is fixedly connected to the encapsulation layer 13. The connection between the end of the clamping body 21 and the encapsulation layer 13 can also achieve the fixation of the clamping member 20.

[0050] Specifically, the clamping body 21 includes a first plate, a second plate, a third plate, and a fourth plate, which are bent in sequence. The card 22 is located on the fourth plate. The first plate has a positioning hole 211 or a positioning groove 212. The encapsulating layer 13 encapsulates a portion of the outer circumference of the stator housing 11, but does not encapsulate the upper and lower end surfaces of the stator housing 11. The encapsulating layer 13 is annular in shape, and the end surface of the encapsulating layer 13 has a positioning boss 111. The positioning boss 111 passes through the positioning hole 211 or the positioning groove 212, and the positioning boss 111 is welded to the first plate. The clamping body 21 is configured as described above to match the shape of the stator housing 11. The end of the positioning boss 111 becomes thicker after melting, and is larger than the size of the positioning hole 211 or the positioning groove 212, thereby limiting the position of the clamping body 21.

[0051] In some embodiments, the stator assembly 10 includes a stator housing 11 and an encapsulation layer 13. The stator housing 11 includes an upper stator housing and a lower stator housing connected to each other. The encapsulation layer 13 encapsulates the connection between the upper stator housing and the lower stator housing, and encapsulates a portion of the outer periphery of the stator housing 11 connected to the connection. The encapsulation layer 13 does not encapsulate the end faces of the upper stator housing and the lower stator housing.

[0052] With this arrangement, the encapsulation layer 13 mainly encapsulates the position that needs protection, and does not encapsulate the entire outer surface of the stator housing 11, thereby reducing the use of injection molding materials. This, while ensuring the insulation and protection effects, saves material costs and improves production efficiency on the one hand, and reduces the injection molding pressure on the other hand, reducing the product performance problems caused by excessive pressure during the injection molding process.

[0053] As shown in Figures 8 and 9, in some embodiments, the stator assembly 10 includes a stator housing 11, an encapsulating layer 13, and a waterproof cover 14. The encapsulating layer 13 encapsulates a portion of the outer circumference of the stator housing 11, but does not encapsulate the upper and lower end surfaces of the stator housing 11, and is annular in shape. The waterproof cover 14 covers the upper portion of the stator housing 11 not covered by the encapsulating layer 13 and is sealed to the upper end of the encapsulating layer 13. The clamping member 20 is located in the area surrounded by the waterproof cover 14, and the end of the clamping body 21 is fixedly connected to the waterproof cover 14. The waterproof cover 14 can provide protection and waterproofing for the upper portion of the stator housing 11. The clamping member 20 is fixedly secured by the fixed connection between the end of the clamping body 21 and the waterproof cover 14.

[0054] Specifically, the waterproof cover 14 has a positioning boss 111 on one side facing the end face of the stator housing 11. The end of the clamping body 21 has a positioning hole 211 or a positioning groove 212. The positioning boss 111 passes through the positioning hole 211 or the positioning groove 212. The positioning boss 111 and the clamping body 21 are welded. The end of the positioning boss 111 becomes thicker after melting, and is larger than the size of the positioning hole 211 or the positioning groove 212, thereby limiting the position of the clamping body 21.

[0055] Furthermore, the stator assembly 10 includes a waterproof base 15, which covers the lower portion of the stator housing 11 not covered by the encapsulation layer 13 and is sealed to the lower end of the encapsulation layer 13. The valve body 30 extends through the waterproof base 15. Both the waterproof base 15 and the waterproof cover 14 are injection molded. The provision of the waterproof base 15 protects and waterproofs the lower portion of the stator housing 11, improving the reliability of the coil assembly.

[0056] The present application also provides an electronic expansion valve, which includes a valve body 30 and the aforementioned coil component. The valve body 30 passes through the stator assembly 10 and is engaged with the clamping member 20. In this solution, the clamping body 21 of the clamping member 20 is fixedly connected to the stator assembly 10, and the card 22 of the clamping member 20 is engaged with the valve body 30. That is, the relative position of the stator assembly 10 and the valve body 30 is fixed by the clamping member 20. This connection method simplifies the connection structure between the valve body 30 and the stator assembly 10, avoids the use of multiple fixing frame structures to achieve the fixation of the coil component and the valve body 30, simplifies the processing structure and process, and reduces product costs.

[0057] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A coil component, characterized in that: include: Stator assembly (10); A card connector (20), the card connector (20) comprising a card connector body (21) and a card (22); The end of the clamping body (21) is fixedly connected to the stator assembly (10), and the clamp (22) is used to clamp to the valve body (30) passing through the stator assembly (10) to define the relative position of the valve body (30) and the coil component.

2. The coil component according to claim 1, characterized in that A portion of the card-connecting body (21) is processed into the card (22), one edge of the card (22) is connected to the card-connecting body (21), and a processing gap is provided between the other edge of the card (22) and the card-connecting body (21).

3. The coil component according to claim 2, characterized in that The card (22) has a convex bump (221), the valve body (30) comprises a sleeve, the outer wall of the sleeve has a groove, and the convex bump (221) is used to be engaged with the groove of the sleeve.

4. The coil component according to claim 1, characterized in that One end of the card (22) close to the stator assembly (10) is connected to the card-connecting body (21), and one end of the card (22) away from the stator assembly (10) is spaced from the card-connecting body (21); or, One end of the card (22) away from the stator assembly (10) is connected to the card-connecting body (21), and one end of the card (22) close to the stator assembly (10) is spaced from the card-connecting body (21).

5. The coil component according to claim 1, characterized in that The clamping member (20) is in the shape of a cross. Both ends of the clamping body (21) are fixedly connected to the stator assembly (10). The clamping body (21) has two opposing clamps (22), and the valve body (30) is located between the two clamps (22).

6. The coil component according to claim 1, characterized in that The stator assembly (10) comprises a stator housing (11) and an enameled wire (12) arranged in the stator housing (11); the stator housing (11) and the clamping member (20) are both made of metal; and the clamping body (21) and the stator housing (11) are welded or riveted.

7. The coil component according to claim 6, characterized in that The end of the clamping body (21) has a positioning hole (211) or a positioning groove (212), the outer wall of the stator housing (11) has a positioning boss (111), the positioning boss (111) passes through the positioning hole (211) or the positioning groove (212), and the positioning boss (111) and the clamping body (21) are welded or riveted.

8. The coil component according to claim 1, characterized in that The stator assembly (10) comprises a stator housing (11) and an injection-molded encapsulation layer (13), wherein the encapsulation layer (13) encapsulates at least a portion of the stator housing (11), and an end of the clamping body (21) is fixedly connected to the encapsulation layer (13).

9. The coil component according to claim 8, characterized in that The card-connecting body (21) comprises a first plate body, a second plate body, a third plate body and a fourth plate body which are bent in sequence, the card (22) is located on the fourth plate body, and the first plate body has a positioning hole (211) or a positioning groove (212); the encapsulation layer (13) encapsulates a part of the outer peripheral surface of the stator housing (11), and the end surface of the encapsulation layer (13) has a positioning boss (111), the positioning boss (111) passes through the positioning hole (211) or the positioning groove (212), and the positioning boss (111) and the first plate body are welded.

10. The coil component according to claim 1, characterized in that The stator assembly (10) comprises a stator shell (11) and an encapsulation layer (13), wherein the stator shell (11) comprises an upper stator shell and a lower stator shell connected to each other, the encapsulation layer (13) encapsulates a connection between the upper stator shell and the lower stator shell, and encapsulates a portion of the outer periphery of the stator shell (11) connected to the connection, and the encapsulation layer (13) does not encapsulate the end faces of the upper stator shell and the lower stator shell.

11. The coil component according to claim 1, characterized in that The stator assembly (10) comprises a stator housing (11), an encapsulation layer (13) and a waterproof cover (14); the encapsulation layer (13) encapsulates a portion of the outer circumference of the stator housing (11); the waterproof cover (14) covers the upper part of the stator housing (11) and is sealed to the upper end of the encapsulation layer (13); the clamping part (20) is located in the area surrounded by the waterproof cover (14); and the end of the clamping body (21) is fixedly connected to the waterproof cover (14).

12. The coil component according to claim 11, characterized in that The waterproof cover (14) has a positioning boss (111) on one side facing the end surface of the stator housing (11), the end of the clamping body (21) has a positioning hole (211) or a positioning groove (212), the positioning boss (111) passes through the positioning hole (211) or the positioning groove (212), and the positioning boss (111) and the clamping body (21) are welded.

13. The coil component according to claim 11, characterized in that The stator assembly (10) further comprises a waterproof base (15), wherein the waterproof base (15) covers the lower portion of the stator housing (11) and is sealed to the lower end of the encapsulation layer (13); the valve body (30) passes through the waterproof base (15); and the waterproof base (15) and the waterproof cover (14) are both injection molded.

14. An electronic expansion valve, characterized in that: The electronic expansion valve comprises a valve body (30) and a coil component according to any one of claims 1 to 13, wherein the valve body (30) passes through the stator assembly (10) and is clamped to the clamping member (20).

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