Coil component and electronic expansion valve

Abstract

The invention provides a coil component and an electronic expansion valve, the coil component comprises a stator assembly, an encapsulation structure and a waterproof cover, the encapsulation structure covers a part of the peripheral surface of the stator assembly, and the waterproof cover covers the top of the stator assembly and is in sealed connection with the upper end of the encapsulation structure. In the scheme, a part of the peripheral surface of the stator assembly is wrapped by the wrapping structure, the top of the stator assembly is covered by the waterproof cover, and the waterproof cover and the wrapping structure are in sealed connection. Therefore, the top of the stator assembly is protected through the waterproof cover, so that the top of the stator assembly has a waterproof function, and the problem that liquid such as rainwater enters from the top of the stator assembly to affect the product performance is avoided.

Description

Technical Field

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

[0002] The coil component of the electronic expansion valve includes a stator assembly having a through hole for the valve body to pass through. The top of the stator assembly is usually an open structure, so that rainwater and other liquids falling from the top of the stator assembly can easily enter the interior of the stator assembly, which may cause problems such as short circuits and affect product performance. Summary of the invention

[0003] The present invention provides a coil component and an electronic expansion valve to solve the problem that liquids such as rainwater easily enter the coil component from the top of a stator assembly, thereby affecting product performance.

[0004] In order to solve the above problems, according to one aspect of the present invention, the present invention provides a coil component, including a stator assembly, an encapsulation structure and a waterproof cover, the encapsulation structure covers a part of the outer circumference of the stator assembly, the waterproof cover covers the top of the stator assembly and is sealed and connected to the upper end of the encapsulation structure.

[0005] Furthermore, the coil component also includes a waterproof base, which covers the bottom of the stator assembly and is sealed and connected to the lower end of the encapsulation structure.

[0006] Furthermore, the encapsulation structure, the waterproof cover and the waterproof base are all injection-molded structures made of plastic materials, and the waterproof cover and the waterproof base are all welded to the encapsulation structure.

[0007] Furthermore, one end of the waterproof cover facing the encapsulation structure is an annular upper mating surface, and the upper mating surface is provided with at least one annular upper welding rib, and the waterproof cover is welded to the encapsulation structure via the upper welding rib.

[0008] Furthermore, the upper mating surface has an annular upper welding groove, and the upper welding groove is used to accommodate excess material after the upper welding rib is melted.

[0009] Furthermore, one end of the waterproof base facing the encapsulation structure is an annular lower mating surface, and the lower mating surface is provided with at least one annular lower welding rib, and the waterproof base is welded to the encapsulation structure via the lower welding rib.

[0010] Furthermore, the lower mating surface has an annular lower welding groove, and the lower welding groove is used to accommodate excess material after the lower welding rib is melted.

[0011] Furthermore, the upper end of the encapsulation structure has an annular upper welding rib, and the waterproof cover is welded to the encapsulation structure through the upper welding rib; and / or, the lower end of the encapsulation structure has an annular lower welding rib, and the waterproof base is welded to the encapsulation structure through the lower welding rib.

[0012] Alternatively, the end faces of the waterproof cover and the encapsulation structure abut against each other and the waterproof cover and the encapsulation structure are snap-fitted; and / or, the end faces of the waterproof base and the encapsulation structure abut against each other and the waterproof base and the encapsulation structure are snap-fitted.

[0013] Further, the encapsulation structure has an upper slot, the waterproof cover has an upper buckle, and the upper buckle is snapped into the upper slot; or, the waterproof cover has an upper slot, the encapsulation structure has an upper buckle, and the upper buckle is snapped into the upper slot.

[0014] Further, the encapsulation structure has a lower slot, the waterproof base has a lower buckle, and the lower buckle is snapped into the lower slot; or, the waterproof base has a lower slot, the encapsulation structure has a lower buckle, and the lower buckle is snapped into the lower slot.

[0015] Furthermore, the waterproof base has an avoidance hole, which is used to avoid the valve body passing through the stator assembly. The diameter of the avoidance hole is D1, and the diameter of the valve body is D2, where D2<D1≤D2+0.15mm.

[0016] Furthermore, the waterproof base has an avoidance hole, which is used to avoid the valve body passing through the stator assembly. The inner wall of the waterproof base has an annular rib surrounding the avoidance hole, and a sealing groove is formed between the annular rib and the inner wall of the waterproof base. The coil component also includes a sealing ring, which is located in the sealing groove and is used to seal the gap between the valve body and the avoidance hole.

[0017] Furthermore, the waterproof cover includes a small barrel section and a large barrel section which are connected to each other, the diameter of the small barrel section is smaller than the diameter of the large barrel section, the large barrel section covers the top of the stator assembly and is sealed to the upper end of the encapsulation structure, and the end of the small barrel section away from the stator assembly has a sealed top wall, and the small barrel section is used to accommodate the end of the valve body passing through the stator assembly.

[0018] Furthermore, the stator assembly includes a winding and two stator shells, the encapsulation structure is injection molded and encapsulates the winding, the two stator shells are arranged opposite to each other and cover the winding and a part of the encapsulation structure, the other part of the encapsulation structure forms an encapsulation layer, the encapsulation layer encapsulates the relative positions of the two stator shells, and the remaining positions of the two stator shells are exposed outside the encapsulation layer.

[0019] According to another aspect of the present invention, an electronic expansion valve is provided. The electronic expansion valve comprises a valve body and the above-mentioned coil component, wherein the valve body passes through a stator assembly in the coil component.

[0020] By applying the technical solution of the present invention, a coil component is provided, including a stator assembly, an encapsulation structure, a waterproof cover and a waterproof base, wherein the encapsulation structure covers a portion of the outer circumference of the stator assembly, the waterproof cover covers the top of the stator assembly and is sealed and connected to the upper end of the encapsulation structure, and the waterproof base covers the bottom of the stator assembly and is sealed and connected to the lower end of the encapsulation structure. In this solution, a portion of the outer circumference of the stator assembly is covered by the encapsulation structure, and the top and bottom of the stator assembly are covered respectively by the waterproof cover and the waterproof base, and the waterproof cover and the waterproof base are both sealed and connected to the encapsulation structure. In this way, the protection and waterproofing of the entire outer surface of the stator assembly are achieved through the split protective structure. Compared with the existing one-piece injection-molded protective structure, the problems of high injection pressure inside the stator assembly and easy injection defects of the protective structure are avoided, thereby improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic structural diagram of a coil component provided in Embodiment 1 of the present invention is shown;

[0023] Figure 2 Shows Figure 1 A cross-sectional view of a coil component in FIG.

[0024] Figure 3 Shows Figure 1 Schematic diagram of the waterproof cover;

[0025] Figure 4 Shows Figure 1 Schematic diagram of the waterproof base in;

[0026] Figure 5 A schematic structural diagram of a coil component provided in a second embodiment of the present invention is shown;

[0027] Figure 6 Shows Figure 5 A cross-sectional view of

[0028] Figure 7 Shows Figure 5 Schematic diagram of the waterproof cover;

[0029] Figure 8 Shows Figure 5 Schematic diagram of the waterproof base in;

[0030] Fig. 9 A schematic structural diagram of a coil component provided in Embodiment 3 of the present invention is shown;

[0031] Fig.10 Shows Fig. 9 Schematic diagram of the waterproof base.

[0032] The above drawings include the following reference numerals:

[0033] 10. Stator assembly; 20. Encapsulation structure; 21. Upper slot; 22. Lower slot; 30. Waterproof cover; 31. Upper welding rib; 32. Upper welding groove; 33. Upper buckle; 34. Small cylinder section; 35. Large cylinder section; 40. Waterproof base; 41. Lower welding rib; 42. Lower welding groove; 43. Lower buckle; 44. Avoidance hole; 45. Annular rib; 50. Sealing ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 10 As shown, an embodiment of the present invention provides a coil component, including a stator assembly 10, an encapsulation structure 20, and a waterproof cover 30, wherein the encapsulation structure 20 covers a portion of the outer circumference of the stator assembly 10, and the waterproof cover 30 covers the top of the stator assembly 10 and is sealed and connected to the upper end of the encapsulation structure 20.

[0036] In this solution, a portion of the outer circumference of the stator assembly 10 is covered by the encapsulation structure 20, and the top of the stator assembly 10 is covered by the waterproof cover 30, and the waterproof cover 30 is sealed and connected to the encapsulation structure 20. In this way, the top of the stator assembly 10 is protected by the waterproof cover 30, so that the top of the stator assembly 10 has a waterproof function, and the problem of liquid such as rainwater entering from the top of the stator assembly 10 and affecting product performance is avoided.

[0037] Furthermore, the coil component also includes a waterproof base 40, which covers the bottom of the stator assembly 10 and is sealed and connected to the lower end of the encapsulation structure 20. The bottom of the stator assembly 10 is protected by the waterproof base 40, so that the bottom of the stator assembly 10 also has a waterproof function, thereby improving the waterproof effect. Through the cooperation of the encapsulation structure 20, the waterproof cover 30 and the waterproof base 40, the inner wall forms a sealed cavity, which can not only prevent external liquid from entering, but also reduce or avoid the generation of condensed water in the sealed cavity, thereby improving the service life of the internal structure.

[0038] In addition, the encapsulation structure 20, the waterproof cover 30 and the waterproof base 40 in the present solution constitute a split protective structure, so that the entire outer surface of the stator assembly 10 is protected and waterproofed through the split protective structure. Compared with the existing one-piece injection-molded protective structure, the problem of high injection pressure inside the stator assembly 10 and injection defects such as pores in the protective structure is avoided, thereby improving product quality.

[0039] Specifically, the stator assembly 10 includes two stator shells, and the stator shells are provided with windings and other structures. The two stator shells are butt-jointed, and the encapsulation structure 20 is an annular structure. The encapsulation structure 20 encapsulates the butt joints of the two stator shells to provide protection and insulation.

[0040] In some embodiments, the encapsulation structure 20, the waterproof cover 30, and the waterproof base 40 are all injection-molded structures of plastic materials, and the waterproof cover 30 and the waterproof base 40 are welded to the encapsulation structure 20. By welding, the waterproof cover 30 and the waterproof base 40 are reliably connected and sealed to the encapsulation structure 20.

[0041] Specifically, one end of the waterproof cover 30 facing the encapsulation structure 20 is an annular upper mating surface, and the upper mating surface is provided with at least one annular upper welding rib 31, and the waterproof cover 30 is welded to the encapsulation structure 20 via the upper welding rib 31. During welding, the heated upper welding rib 31 melts, and the waterproof cover 30 and the encapsulation structure 20 are bonded and sealed, and after the material solidifies, a reliable connection between the two is achieved.

[0042] Furthermore, the upper mating surface has an annular upper welding groove 32, and the upper welding groove 32 is used to accommodate the excess material after the upper welding rib 31 is melted. This avoids the welding material from flowing randomly and improves the product quality.

[0043] like Figure 4 As shown, one end of the waterproof base 40 facing the encapsulation structure 20 is an annular lower mating surface, and the lower mating surface is provided with at least one annular lower welding rib 41, and the waterproof base 40 is welded to the encapsulation structure 20 via the lower welding rib 41. During welding, the heated lower welding rib 41 melts, and the waterproof base 40 and the encapsulation structure 20 are bonded and sealed, and after the material solidifies, a reliable connection between the two is achieved.

[0044] Furthermore, the lower mating surface has an annular lower welding groove 42, and the lower welding groove 42 is used to accommodate the excess material after the lower welding rib 41 is melted. This prevents the welding material from flowing randomly and improves the product quality.

[0045] Optionally, the upper end of the encapsulation structure 20 has an annular upper welding rib 31, and the waterproof cover 30 is welded to the encapsulation structure 20 through the upper welding rib 31; during welding, the heated upper welding rib 31 melts, bonding and sealing the waterproof cover 30 and the encapsulation structure 20, and after the material solidifies, a reliable connection between the two is achieved.

[0046] Alternatively, the lower end of the encapsulation structure 20 has an annular lower welding rib 41, and the waterproof base 40 is welded to the encapsulation structure 20 via the lower welding rib 41. During welding, the heated lower welding rib 41 melts, and the waterproof base 40 and the encapsulation structure 20 are bonded and sealed, and after the material solidifies, a reliable connection between the two is achieved.

[0047] In some embodiments, the end faces of the waterproof cover 30 and the encapsulation structure 20 abut against each other and the waterproof cover 30 and the encapsulation structure 20 are snap-fitted; and / or, the end faces of the waterproof base 40 and the encapsulation structure 20 abut against each other and the waterproof base 40 and the encapsulation structure 20 are snap-fitted. In this way, the waterproof cover 30, the waterproof base 40 and the encapsulation structure 20 can be reliably connected and sealed by snap-fitting. In addition, the snap-fitting method is easy to operate.

[0048] like Figure 5 , Figure 6 , Figure 7 As shown, the encapsulation structure 20 has an upper slot 21, and the waterproof cover 30 has an upper buckle 33, which is snapped into the upper slot 21; or, the waterproof cover 30 has an upper slot 21, and the encapsulation structure 20 has an upper buckle 33, which is snapped into the upper slot 21. Through the cooperation of the upper slot 21 and the upper buckle 33, the encapsulation structure 20 and the waterproof cover 30 are reliably connected.

[0049] like Figure 6 and Figure 8 As shown, the encapsulation structure 20 has a lower card slot 22, and the waterproof base 40 has a lower card buckle 43, and the lower card buckle 43 is snapped into the lower card slot 22; or, the waterproof base 40 has a lower card slot 22, and the encapsulation structure 20 has a lower card buckle 43, and the lower card buckle 43 is snapped into the lower card slot 22. Through the cooperation of the lower card slot 22 and the lower card buckle 43, the encapsulation structure 20 and the waterproof base 40 are reliably connected.

[0050] In this solution, the waterproof base 40 has an avoidance hole 44, which is used to avoid the valve body passing through the stator assembly 10. The diameter of the avoidance hole 44 is D1, and the diameter of the valve body is D2, where D2<D1≤D2+0.15mm.

[0051] During the operation of the valve body and coil components, when the temperature of the valve body surface is lower than the ambient temperature, water vapor in the air will condense on the valve body surface to form dewdrops; the air content inside the waterproof cover 30 is relatively low, so there is less water vapor in the air and condensed water cannot form; for the waterproof base 40, when condensed water needs to be prevented, in the waterproof base 40, the diameter of the avoidance hole 44 does not exceed 0.15mm of the valve body diameter, so that a sealing effect will be formed when the gap is small. If the gap is too large, the air inside the coil component and the external air will circulate, and condensed water cannot be effectively prevented.

[0052] In another embodiment, the waterproof base 40 has an avoidance hole 44, which is used to avoid the valve body passing through the stator assembly 10. The inner wall of the waterproof base 40 has an annular rib 45 surrounding the avoidance hole 44, and a sealing groove is formed between the annular rib 45 and the inner wall of the waterproof base 40. The coil component also includes a sealing ring 50, which is located in the sealing groove and is used to seal the gap between the valve body and the avoidance hole 44. In this way, the gap between the valve body and the avoidance hole 44 is sealed by the sealing ring 50, and the annular rib 45 plays a supporting and limiting role on the sealing ring 50.

[0053] The waterproof cover 30 includes a small barrel section 34 and a large barrel section 35 connected to each other. The diameter of the small barrel section 34 is smaller than that of the large barrel section 35. The large barrel section 35 covers the top of the stator assembly 10 and is sealed and connected to the upper end of the encapsulation structure 20. The end of the small barrel section 34 away from the stator assembly 10 has a sealed top wall. The small barrel section 34 is used to accommodate the end of the valve body passing through the stator assembly 10. The small barrel section 34 protects the end of the valve body, and the large barrel section 35 protects the top of the stator assembly 10.

[0054] In this solution, the stator assembly 10 includes a winding and two stator housings. The encapsulation structure 20 is injection molded and encapsulates the winding. The two stator housings are arranged opposite to each other and cover the winding and a portion of the encapsulation structure 20. The other portion of the encapsulation structure 20 forms an encapsulation layer. The encapsulation layer encapsulates the relative positions of the two stator housings, and the remaining positions of the two stator housings are exposed outside the encapsulation layer.

[0055] Through the above arrangement, the encapsulation structure 20 mainly encapsulates the internal gap of the stator shell and the relative position of the two stator shells. The ends of the stator shell are usually not prone to problems and are not encapsulated. Therefore, this solution encapsulates the positions that mainly need to be protected, and does not encapsulate the entire outer surface of the stator shell, thereby reducing the use of injection molding materials. In this way, while ensuring the insulation and protection effects, on the one hand, material costs are saved and production efficiency is improved, and on the other hand, the injection molding pressure is reduced, thereby reducing poor product performance caused by excessive pressure during the product injection molding process.

[0056] The present invention also provides an electronic expansion valve, which includes a valve body and the above-mentioned coil component, and the valve body passes through the stator assembly 10 in the coil component. In this scheme, a portion of the outer peripheral surface of the stator assembly 10 is covered by the encapsulation structure 20, and the top and bottom of the stator assembly 10 are covered by the waterproof cover 30 and the waterproof base 40 respectively, and the waterproof cover 30 and the waterproof base 40 are both sealed and connected to the encapsulation structure 20. The encapsulation structure 20, the waterproof cover 30 and the waterproof base 40 constitute a split protective structure, so that the protection and waterproofing of the entire outer surface of the stator assembly 10 are achieved through the split protective structure. Compared with the existing one-piece injection molding protective structure, the problems of high injection pressure inside the stator assembly 10 and injection defects such as pores in the protective structure are avoided, thereby improving product quality.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0058] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0059] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0060] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0061] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0062] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

Claims

1. A coil component, characterized in that: The invention comprises a stator assembly (10), an encapsulation structure (20) and a waterproof cover (30), wherein the encapsulation structure (20) covers a portion of the outer peripheral surface of the stator assembly (10), and the waterproof cover (30) covers the top of the stator assembly (10) and is sealed and connected to the upper end of the encapsulation structure (20).

2. The coil component according to claim 1, characterized in that The coil component also includes a waterproof base (40), which covers the bottom of the stator assembly (10) and is sealed and connected to the lower end of the encapsulation structure (20).

3. The coil component according to claim 2, characterized in that The encapsulating structure (20), the waterproof cover (30), and the waterproof base (40) are all injection-molded structures made of plastic materials, and the waterproof cover (30) and the waterproof base (40) are both welded to the encapsulating structure (20).

4. The coil component according to claim 3, characterized in that One end of the waterproof cover (30) facing the encapsulation structure (20) is an annular upper mating surface, and the upper mating surface is provided with at least one annular upper welding rib (31). The waterproof cover (30) is welded to the encapsulation structure (20) via the upper welding rib (31).

5. The coil component according to claim 4, characterized in that The upper mating surface has an annular upper welding groove (32), and the upper welding groove (32) is used to accommodate excess material after the upper welding rib (31) is melted.

6. The coil component according to claim 3, characterized in that One end of the waterproof base (40) facing the encapsulation structure (20) is an annular lower mating surface, and the lower mating surface is provided with at least one annular lower welding rib (41). The waterproof base (40) is welded to the encapsulation structure (20) via the lower welding rib (41).

7. The coil component according to claim 6, characterized in that The lower mating surface has an annular lower welding groove (42), and the lower welding groove (42) is used to accommodate excess material after the lower welding rib (41) is melted.

8. The coil component according to claim 3, characterized in that The upper end of the encapsulation structure (20) has an annular upper welding rib (31), and the waterproof cover (30) is welded to the encapsulation structure (20) via the upper welding rib (31); and / or the lower end of the encapsulation structure (20) has an annular lower welding rib (41), and the waterproof base (40) is welded to the encapsulation structure (20) via the lower welding rib (41).

9. The coil component according to claim 2, characterized in that: The end faces of the waterproof cover (30) and the encapsulating structure (20) abut against each other and the waterproof cover (30) and the encapsulating structure (20) are snap-fitted; and / or the end faces of the waterproof base (40) and the encapsulating structure (20) abut against each other and the waterproof base (40) and the encapsulating structure (20) are snap-fitted.

10. The coil component according to claim 2, characterized in that The encapsulation structure (20) has an upper slot (21), and the waterproof cover (30) has an upper buckle (33), and the upper buckle (33) is snapped into the upper slot (21); or, the waterproof cover (30) has an upper slot (21), and the encapsulation structure (20) has an upper buckle (33), and the upper buckle (33) is snapped into the upper slot (21).

11. The coil component according to claim 2, characterized in that: The encapsulation structure (20) has a lower slot (22), and the waterproof base (40) has a lower buckle (43), and the lower buckle (43) is snapped into the lower slot (22); or, the waterproof base (40) has a lower slot (22), and the encapsulation structure (20) has a lower buckle (43), and the lower buckle (43) is snapped into the lower slot (22).

12. The coil component according to claim 2, characterized in that The waterproof base (40) has an avoidance hole (44), and the avoidance hole (44) is used to avoid the valve body passing through the stator assembly (10). The diameter of the avoidance hole (44) is D1, and the diameter of the valve body is D2, where D2<D1≤D2+0.15mm.

13. The coil component according to claim 2, characterized in that The waterproof base (40) has an avoidance hole (44), and the avoidance hole (44) is used to avoid the valve body passing through the stator assembly (10). The inner wall of the waterproof base (40) has an annular rib (45) surrounding the avoidance hole (44), and a sealing groove is formed between the annular rib (45) and the inner wall of the waterproof base (40). The coil component also includes a sealing ring (50), and the sealing ring (50) is located in the sealing groove. The sealing ring (50) is used to seal the gap between the valve body and the avoidance hole (44).

14. The coil component according to claim 1, characterized in that The waterproof cover (30) comprises a small barrel section (34) and a large barrel section (35) which are connected to each other. The diameter of the small barrel section (34) is smaller than the diameter of the large barrel section (35). The large barrel section (35) covers the top of the stator assembly (10) and is sealed to the upper end of the encapsulation structure (20). The end of the small barrel section (34) away from the stator assembly (10) has a sealed top wall. The small barrel section (34) is used to accommodate the end of a valve body passing through the stator assembly (10).

15. The coil component according to claim 1, characterized in that The stator assembly (10) comprises a winding and two stator shells, the encapsulation structure (20) is injection molded and encapsulates the winding, the two stator shells are arranged opposite to each other and cover the winding and a part of the encapsulation structure (20), another part of the encapsulation structure (20) forms an encapsulation layer, the encapsulation layer encapsulates the relative positions of the two stator shells, and the remaining positions of the two stator shells are exposed outside the encapsulation layer.

16. An electronic expansion valve, characterized in that: The electronic expansion valve comprises a valve body and a coil component according to any one of claims 1 to 15, wherein the valve body passes through a stator assembly (10) in the coil component.

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