Coil component and electronic expansion valve

Abstract

The invention provides a coil component and an electronic expansion valve, the coil component comprises two stator shells, a winding, a stator pole plate group and an encapsulation structure, the winding is sleeved on the stator pole plate group, the encapsulation structure is formed by injection molding and encapsulates the winding, the two stator shells are oppositely arranged and cover the winding and a part of the encapsulation structure, the other part of the encapsulation structure forms an encapsulation layer, and the encapsulation layer is arranged between the two stator shells. The encapsulation layer encapsulates the opposite positions of the two stator shells, and the other positions of the two stator shells are exposed out of the encapsulation layer; wherein one stator housing is mounted before injection molding of the encapsulation structure, and the other stator housing is mounted after injection molding of the encapsulation structure, or both stator housings are mounted after injection molding of the encapsulation structure. According to the scheme, on one hand, the material cost is saved, the production efficiency is improved, and on the other hand, poor product performance caused by overlarge pressure in the product injection molding process is reduced. And moreover, injection molding defects such as holes are reduced, and the product quality is improved.

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] In the coil component of the electronic expansion valve, in order to provide good insulation and protection for the stator housing and internal structure, an injection molding encapsulation structure is usually used to completely encapsulate the outer surface of the stator housing and fill the gaps in the stator housing. This encapsulation structure has a large encapsulation area, resulting in more material usage and high injection molding pressure inside the product, which affects product performance. In addition, the production process usually involves assembling the stator housing and other structures first, and then injection molding the encapsulation structure. Since part of the injection molding material needs to enter the gap inside the stator housing, there is a problem of injection molding defects. Therefore, it is necessary to improve the existing coil components. Summary of the invention

[0003] The present invention provides a coil component and an electronic expansion valve, which at least solve the problems of using more encapsulation structure materials in the coil component and high injection molding pressure inside the product.

[0004] In order to solve the above-mentioned problem, according to one aspect of the present invention, the present invention provides a coil component, comprising two stator housings, a winding, a stator pole plate group and an encapsulation structure, wherein the winding is sleeved on the stator pole plate group, the encapsulation structure is injection molded and encapsulates the winding, the two stator housings 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 housings, and the remaining positions of the two stator housings are exposed outside the encapsulation layer; wherein one stator housing is installed before the encapsulation structure is injection molded, and the other stator housing is installed after the encapsulation structure is injection molded, or both stator housings are installed after the encapsulation structure is injection molded.

[0005] Furthermore, the stator shell is made of metal, and the opposite end surfaces of the two stator shells are connected by welding.

[0006] Alternatively, the two stator housings are snap-fitted to each other.

[0007] Furthermore, the inner wall of the encapsulation layer has an avoidance groove, and the avoidance groove avoids the clamping position of the two stator shells.

[0008] Further, one stator housing is provided with at least one buckle, the buckle has a buckling hole, and the other stator housing is provided with at least one convex bump, and the buckle hole and the corresponding convex bump are buckled; or, both stator housings have at least one buckle and at least one convex bump, the buckle has a buckling hole, wherein the buckle hole of one stator housing is buckled with the convex bump of the other stator housing.

[0009] Alternatively, at least one spring sheet is provided on one stator housing, the spring sheet has a slot, and an annular rib is provided on the other stator housing, and the slot of the spring sheet and the annular rib are engaged; or, both stator housings have annular ribs and at least one spring sheet, the spring sheet has a slot, wherein the slot of the spring sheet of one stator housing is engaged with the annular rib of the other stator housing.

[0010] Furthermore, the two stator shells are respectively an upper shell and a lower shell, the stator pole plate group includes an upper stator pole plate and a lower stator pole plate, the upper stator pole plate and the lower stator pole plate are coaxial and arranged side by side; there are two windings, one winding is located in the area surrounded by the upper shell and the upper stator pole plate, and the other winding is located in the area surrounded by the lower shell and the lower stator pole plate.

[0011] Alternatively, the upper shell is clamped to the upper stator pole plate, and the lower shell is clamped to the lower stator pole plate; or, the upper shell is clamped to the lower stator pole plate, and the lower shell is clamped to the upper stator pole plate.

[0012] Furthermore, the inner wall of the encapsulation layer has a plurality of avoidance grooves, and the avoidance grooves avoid the clamping positions of the stator housing and the stator pole plate assembly.

[0013] Furthermore, both the upper shell and the lower shell are provided with at least one bulge, and both the upper stator pole plate and the lower stator pole plate are provided with at least one buckle, the direction of the buckle on the upper stator pole plate is the same as the direction of the claw pole on the upper stator pole plate, and the direction of the buckle on the lower stator pole plate is the same as the direction of the claw pole on the lower stator pole plate; wherein, the bulge on the upper shell is snap-connected with the buckle on the upper stator pole plate, and the bulge on the lower shell is snap-connected with the buckle on the lower stator pole plate.

[0014] Alternatively, both the upper shell and the lower shell are provided with at least one bulge, and both the upper stator pole plate and the lower stator pole plate are provided with at least one buckle, the direction of the buckle on the upper stator pole plate is opposite to the direction of the claw pole on the upper stator pole plate, and the direction of the buckle on the lower stator pole plate is opposite to the direction of the claw pole on the lower stator pole plate; wherein, the bulge on the upper shell is snap-connected with the buckle on the lower stator pole plate, and the bulge on the lower shell is snap-connected with the buckle on the upper stator pole plate.

[0015] Alternatively, both the upper shell and the lower shell are provided with annular ribs, and both the upper stator pole plate and the lower stator pole plate are provided with at least one spring sheet, the orientation of the spring sheet on the upper stator pole plate is the same as the orientation of the claw pole on the upper stator pole plate, and the orientation of the spring sheet on the lower stator pole plate is the same as the orientation of the claw pole on the lower stator pole plate; wherein, the annular rib on the upper shell is clamped with the spring sheet on the upper stator pole plate, and the annular rib on the lower shell is clamped with the spring sheet on the lower stator pole plate.

[0016] Alternatively, both the upper shell and the lower shell are provided with annular ribs, and both the upper stator pole plate and the lower stator pole plate are provided with at least one spring sheet, the direction of the spring sheet on the upper stator pole plate is opposite to the direction of the claw pole on the upper stator pole plate, and the direction of the spring sheet on the lower stator pole plate is opposite to the direction of the claw pole on the lower stator pole plate; wherein, the annular rib on the upper shell is clamped with the spring sheet on the lower stator pole plate, and the annular rib on the lower shell is clamped with the spring sheet on the upper stator pole plate.

[0017] 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 plate group in the coil component.

[0018] By applying the technical solution of the present invention, a coil component is provided, comprising two stator housings, a winding, a stator pole plate group and an encapsulation structure, wherein the winding is sleeved on the stator pole plate group, the encapsulation structure is injection molded and encapsulates the winding, the two stator housings 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 housings, and the remaining positions of the two stator housings are exposed outside the encapsulation layer; wherein one stator housing is installed before the encapsulation structure is injection molded, and the other stator housing is installed after the encapsulation structure is injection molded, or both stator housings are installed after the encapsulation structure is injection molded. In this scheme, the encapsulation structure 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 scheme encapsulates the main position that needs protection, and does not encapsulate the entire outer surface of the stator shell, thereby reducing the use of injection molding materials. In this way, on the premise of ensuring insulation and protection effects, on the one hand, it saves material costs and improves production efficiency, and on the other hand, it reduces injection molding pressure and reduces poor product performance caused by excessive pressure during product injection molding. In addition, in this scheme, before the injection molding encapsulation structure, the stator shell is not installed or only one stator shell is installed, so that the injection molding fluid can flow better to form a high-quality encapsulation structure, reduce injection molding defects such as holes, and improve product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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:

[0020] Figure 1 A schematic structural diagram of a coil component provided in Embodiment 1 of the present invention is shown;

[0021] Figure 2 Shows Figure 1 A cross-sectional view of

[0022] Figure 3 Shows Figure 1 A schematic diagram of a structure in which a coil component is first installed on a stator housing and then encapsulated by injection molding;

[0023] Figure 4 Shows Figure 3 A cross-sectional view of

[0024] Figure 5 Shows Figure 1 Schematic diagram of the coil component being injection molded and encapsulated before being installed in the stator housing;

[0025] Figure 6 Shows Figure 5 A cross-sectional view of

[0026] Figure 7 A schematic structural diagram of a coil component provided in a second embodiment of the present invention is shown;

[0027] Figure 8 Shows Figure 7 Schematic diagram of removing the encapsulation structure;

[0028] Fig. 9 Shows Figure 7 Schematic diagram of the stator housing in FIG.

[0029] Fig.10 A schematic structural diagram of a coil component provided in Embodiment 3 of the present invention is shown;

[0030] Fig.11 Shows Fig.10 Schematic diagram of removing the encapsulation structure;

[0031] Fig.12 Shows Fig.10 Schematic diagram of the stator housing in FIG.

[0032] Fig.13 A schematic structural diagram of a coil component provided in a fourth embodiment of the present invention is shown;

[0033] Fig.14 Shows Fig.13 A schematic diagram of an upper housing;

[0034] Fig.15 Shows Fig.13 Schematic diagram of the upper stator plate in FIG.

[0035] Fig.16 A schematic structural diagram of a coil component provided in a fifth embodiment of the present invention is shown;

[0036] Fig.17 Shows Fig.16 A schematic diagram of a lower housing;

[0037] Fig.18 Shows Fig.16 Schematic diagram of the upper stator plate in FIG.

[0038] Fig.19 A schematic structural diagram of a coil component provided in a sixth embodiment of the present invention is shown;

[0039] Fig. 20 Shows Fig.19 A schematic diagram of an upper housing;

[0040] Fig.21 Shows Fig.19 Schematic diagram of the upper stator plate in FIG.

[0041] Fig. 22 A schematic structural diagram of a coil component provided in Embodiment 7 of the present invention is shown;

[0042] Fig.23 Shows Fig. 22 A schematic diagram of a lower housing;

[0043] Fig.24 Shows Fig. 22 Schematic diagram of the upper stator plate in FIG.

[0044] The above drawings include the following reference numerals:

[0045] 10. stator housing; 20. winding; 30. stator pole plate group; 31. upper stator pole plate; 32. lower stator pole plate; 33. claw pole; 40. encapsulation structure; 41. encapsulation layer; 42. avoidance groove; 51. buckle; 52. convex bulge; 53. spring piece; 54. annular rib. DETAILED DESCRIPTION

[0046] 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.

[0047] like Figures 1 to 24As shown, the present invention provides a coil component, including two stator housings 10, a winding 20, a stator pole plate group 30 and an encapsulation structure 40, wherein the winding 20 is sleeved on the stator pole plate group 30, the encapsulation structure 40 is injection molded and encapsulates the winding 20, the two stator housings 10 are arranged opposite to each other and cover the winding 20 and a part of the encapsulation structure 40, the other part of the encapsulation structure 40 forms an encapsulation layer 41, the encapsulation layer 41 encapsulates the relative positions of the two stator housings 10, and the remaining positions of the two stator housings 10 are exposed outside the encapsulation layer 41; wherein one stator housing 10 is installed before the encapsulation structure 40 is injection molded, and the other stator housing 10 is installed after the encapsulation structure 40 is injection molded, or both stator housings 10 are installed after the encapsulation structure 40 is injection molded.

[0048] In this solution, the encapsulation structure 40 mainly encapsulates the winding and pin parts inside the stator housing 10 to insulate them and encapsulates the relative positions of the two stator housings 10. The ends of the stator housing 10 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 housing 10, thereby reducing the use of injection molding materials. In this way, on the premise of ensuring insulation and protection effects, on the one hand, it saves material costs and improves production efficiency, and on the other hand, it reduces injection molding pressure and reduces poor product performance caused by excessive pressure during product injection molding. In addition, in this solution, before the injection molding of the encapsulation structure 40, the stator housing 10 is not installed or only one stator housing 10 is installed, so that the injection molding fluid can flow better to form a high-quality encapsulation structure 40, reducing injection molding defects such as holes and improving product quality.

[0049] Specifically, the encapsulation layer 41 in the encapsulation structure 40 is an annular structure, and the encapsulation layer 41 encapsulates the relative positions of the two stator shells 10, wherein the top area of ​​one stator shell 10 is located outside the upper end of the encapsulation layer 41, and the bottom area of ​​the other stator shell 10 is located outside the lower end of the encapsulation layer 41.

[0050] like Figure 3 and Figure 4 As shown, one stator housing 10 may be installed first, then the encapsulation structure 40 may be injection molded, and then another stator housing 10 may be installed.

[0051] like Figure 5 and Figure 6 As shown, the stator housing 10 may not be installed first, the structure 40 may be injection molded first, and then the two stator housings 10 may be installed.

[0052] Compared with the existing method of first installing two stator housings 10 and then injection molding the encapsulation structure 40, the above two processing methods reduce the injection pressure of the injection molding material on the internal structure of the product, thereby reducing the problem of poor product performance caused by excessive pressure during the product injection molding process.

[0053] Specifically, the encapsulation layer 41 may be configured to encapsulate only the positions where the two stator housings 10 are fixedly connected to each other, or only the positions where the stator housing 10 is fixedly connected to the stator pole plate group 30. Alternatively, the encapsulation layer 41 may also be configured as an annular structure, and continuously encapsulates the stator housing 10 in the circumferential direction.

[0054] Furthermore, a plurality of pins are provided in the coil component, and the encapsulation layer 41 needs to encapsulate the positions where the pins are located to achieve a waterproof and insulating effect.

[0055] In this solution, the coil component further includes an annular coil frame, the winding 20 is wound on the coil frame, and the coil frame and the stator pole plate group 30 are sleeved.

[0056] like Figure 2 As shown, in one embodiment, the stator housing 10 is made of metal, and the opposite end surfaces of the two stator housings 10 are connected by welding. The welding method has high connection strength.

[0057] In this solution, the two stator housings 10 can be connected by means of mutual snap-fitting, and this assembly method is easy to operate.

[0058] When the two stator housings 10 are connected by snapping, the inner wall of the encapsulation layer 41 has an avoidance groove 42 , and the avoidance groove 42 avoids the snapping position of the two stator housings 10 to leave an assembly space and avoid structural interference.

[0059] like Figures 7 to 9 As shown, in some embodiments, the specific snap-on structure can be: at least one snap 51 is provided on one stator housing 10, the snap 51 has a snap hole, and at least one convex bump 52 is provided on the other stator housing 10, and the snap hole of the snap 51 is snapped with the corresponding convex bump 52; or: both stator housings 10 have at least one snap 51 and at least one convex bump 52, the snap 51 has a snap hole, wherein the snap hole of the snap 51 of one stator housing 10 is snapped with the convex bump 52 of the other stator housing 10.

[0060] like Figures 10 to 12 As shown, in some embodiments, the specific snap-in structure can be: at least one spring piece 53 is provided on one stator housing 10, the spring piece 53 has a snap-in groove, and an annular rib 54 is provided on the other stator housing 10, and the snap-in groove of the spring piece 53 and the annular rib 54 are snap-in; or: both stator housings 10 have annular ribs 54 and at least one spring piece 53, the spring piece 53 has a snap-in groove, wherein the snap-in groove of the spring piece 53 of one stator housing 10 and the annular rib 54 of the other stator housing 10 are snap-in.

[0061] In this solution, the two stator housings 10 are respectively an upper housing and a lower housing, the stator plate group 30 includes an upper stator plate 31 and a lower stator plate 32, the upper stator plate 31 and the lower stator plate 32 are coaxial and arranged side by side; there are two windings 20, one winding 20 is located in the area surrounded by the upper housing and the upper stator plate 31, and the other winding 20 is located in the area surrounded by the lower housing and the lower stator plate 32. The two windings 20 are fixed by the cooperation of multiple structures.

[0062] In some embodiments, the upper housing is snap-fitted with the upper stator plate 31, and the lower housing is snap-fitted with the lower stator plate 32; or, the upper housing is snap-fitted with the lower stator plate 32, and the lower housing is snap-fitted with the upper stator plate 31. That is, by snap-fitting the stator housing 10 and the stator plate assembly 30, the two stator housings 10 can also be fixed.

[0063] The inner wall of the encapsulation layer 41 has a plurality of avoidance grooves 42, and the avoidance grooves 42 avoid the clamping positions of the stator housing 10 and the stator pole plate assembly 30. In this way, a clamping space is reserved and structural interference is avoided.

[0064] like Figures 13 to 15 As shown, in one embodiment, both the upper shell and the lower shell are provided with at least one convex bulge 52, and both the upper stator pole plate 31 and the lower stator pole plate 32 are provided with at least one buckle 51, the buckle 51 on the upper stator pole plate 31 is oriented in the same direction as the claw pole 33 on the upper stator pole plate 31, and the buckle 51 on the lower stator pole plate 32 is oriented in the same direction as the claw pole 33 on the lower stator pole plate 32; wherein, the convex bulge 52 on the upper shell is snapped with the buckle 51 on the upper stator pole plate 31, and the convex bulge 52 on the lower shell is snapped with the buckle 51 on the lower stator pole plate 32. Through the cooperation of the convex bulge 52 and the buckle 51, a reliable connection between the stator shell 10 and the stator pole plate group 30 is achieved.

[0065] like Figures 16 to 18 As shown, in one embodiment, both the upper shell and the lower shell are provided with at least one convex bulge 52, and both the upper stator pole plate 31 and the lower stator pole plate 32 are provided with at least one buckle 51, the buckle 51 on the upper stator pole plate 31 is oriented opposite to the claw pole 33 on the upper stator pole plate 31, and the buckle 51 on the lower stator pole plate 32 is oriented opposite to the claw pole 33 on the lower stator pole plate 32; wherein, the convex bulge 52 on the upper shell is snapped with the buckle 51 on the lower stator pole plate 32, and the convex bulge 52 on the lower shell is snapped with the buckle 51 on the upper stator pole plate 31. Through the cooperation of the convex bulge 52 and the buckle 51, a reliable connection between the stator shell 10 and the stator pole plate group 30 is achieved.

[0066] like Figures 19 to 21As shown, in one embodiment, both the upper shell and the lower shell are provided with an annular rib 54, and both the upper stator pole plate 31 and the lower stator pole plate 32 are provided with at least one spring piece 53, the spring piece 53 on the upper stator pole plate 31 is oriented in the same direction as the claw pole 33 on the upper stator pole plate 31, and the spring piece 53 on the lower stator pole plate 32 is oriented in the same direction as the claw pole 33 on the lower stator pole plate 32; wherein, the annular rib 54 on the upper shell is engaged with the spring piece 53 on the upper stator pole plate 31, and the annular rib 54 on the lower shell is engaged with the spring piece 53 on the lower stator pole plate 32. Through the engagement of the spring piece 53 and the annular rib 54, a reliable connection between the stator shell 10 and the stator pole plate group 30 is achieved.

[0067] like Figure 22 to Figure 24 As shown, in one embodiment, both the upper shell and the lower shell are provided with an annular rib 54, and both the upper stator pole plate 31 and the lower stator pole plate 32 are provided with at least one spring piece 53, the spring piece 53 on the upper stator pole plate 31 is oriented opposite to the claw pole 33 on the upper stator pole plate 31, and the spring piece 53 on the lower stator pole plate 32 is oriented opposite to the claw pole 33 on the lower stator pole plate 32; wherein, the annular rib 54 on the upper shell is engaged with the spring piece 53 on the lower stator pole plate 32, and the annular rib 54 on the lower shell is engaged with the spring piece 53 on the upper stator pole plate 31. Through the engagement of the spring piece 53 and the annular rib 54, a reliable connection between the stator shell 10 and the stator pole plate group 30 is achieved.

[0068] 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 plate group 30 in the coil component. In this solution, the encapsulation structure 40 mainly encapsulates the internal gap of the stator housing 10 and the relative position of the two stator housings 10. The ends of the stator housing 10 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 housing 10, thereby reducing the use of injection molding materials. On the one hand, this saves material costs and improves production efficiency, and on the other hand, reduces injection molding pressure and reduces poor product performance caused by excessive pressure during product injection molding. In addition, in this solution, before the injection molding of the encapsulation structure 40, the stator housing 10 is not installed or only one stator housing 10 is installed, so that the injection molding fluid can flow better to form a high-quality encapsulation structure 40, reducing injection molding defects such as holes and improving product quality.

[0069] The above description is only a preferred embodiment of the present invention and is 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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 two stator housings (10), a winding (20), a stator pole plate group (30) and an encapsulation structure (40), wherein the winding (20) is sleeved on the stator pole plate group (30), the encapsulation structure (40) is injection-molded and encapsulates the winding (20), the two stator housings (10) are arranged opposite to each other and cover the winding (20) and a part of the encapsulation structure (40), the other part of the encapsulation structure (40) forms an encapsulation layer (41), the encapsulation layer (41) encapsulates the relative positions of the two stator housings (10), and the remaining positions of the two stator housings (10) are exposed outside the encapsulation layer (41); wherein one of the stator housings (10) is installed before the encapsulation structure (40) is injection-molded, and the other stator housing (10) is installed after the encapsulation structure (40) is injection-molded, or both of the stator housings (10) are installed after the encapsulation structure (40) is injection-molded.

2. The coil component according to claim 1, characterized in that The stator housing (10) is made of metal, and the opposite end surfaces of the two stator housings (10) are connected by welding.

3. The coil component according to claim 1, characterized in that The two stator housings (10) are clamped together.

4. The coil component according to claim 3, characterized in that The inner wall of the encapsulation layer (41) has an avoidance groove (42), and the avoidance groove (42) avoids the clamping position of the two stator shells (10).

5. The coil component according to claim 3, characterized in that One of the stator housings (10) is provided with at least one buckle (51), the buckle (51) having a buckling hole, and the other of the stator housings (10) is provided with at least one convex bump (52), the buckling hole of the buckle (51) being buckled with the corresponding convex bump (52); or, The two stator housings (10) each have at least one buckle (51) and at least one convex bump (52), the buckle (51) having a buckle hole, wherein the buckle hole of the buckle (51) of one stator housing (10) is buckled with the convex bump (52) of the other stator housing (10).

6. The coil component according to claim 3, characterized in that One of the stator housings (10) is provided with at least one spring sheet (53), the spring sheet (53) having a slot, and the other of the stator housings (10) is provided with an annular rib (54), the slot of the spring sheet (53) being in locking engagement with the annular rib (54); or, The two stator housings (10) each have an annular rib (54) and at least one elastic sheet (53), wherein the elastic sheet (53) has a slot, wherein the slot of the elastic sheet (53) of one stator housing (10) is snap-fitted to the annular rib (54) of the other stator housing (10).

7. The coil component according to claim 1, characterized in that The two stator shells (10) are respectively an upper shell and a lower shell, the stator pole plate group (30) comprises an upper stator pole plate (31) and a lower stator pole plate (32), the upper stator pole plate (31) and the lower stator pole plate (32) are coaxial and arranged side by side; there are two windings (20), one winding (20) is located in an area surrounded by the upper shell and the upper stator pole plate (31), and the other winding (20) is located in an area surrounded by the lower shell and the lower stator pole plate (32).

8. The coil component according to claim 7, characterized in that The upper shell and the upper stator pole plate (31) are snap-fitted, and the lower shell and the lower stator pole plate (32) are snap-fitted; or, the upper shell and the lower stator pole plate (32) are snap-fitted, and the lower shell and the upper stator pole plate (31) are snap-fitted.

9. The coil component according to claim 8, characterized in that The inner wall of the encapsulation layer (41) has a plurality of avoidance grooves (42), and the avoidance grooves (42) avoid the clamping positions of the stator housing (10) and the stator pole plate group (30).

10. The coil component according to claim 8, characterized in that The upper shell and the lower shell are both provided with at least one convex bump (52), and the upper stator pole plate (31) and the lower stator pole plate (32) are both provided with at least one buckle (51), the buckle (51) on the upper stator pole plate (31) is oriented in the same direction as the claw pole (33) on the upper stator pole plate (31), and the buckle (51) on the lower stator pole plate (32) is oriented in the same direction as the claw pole (33) on the lower stator pole plate (32); wherein the convex bump (52) on the upper shell is buckled with the buckle (51) on the upper stator pole plate (31), and the convex bump (52) on the lower shell is buckled with the buckle (51) on the lower stator pole plate (32).

11. The coil component according to claim 8, characterized in that The upper shell and the lower shell are both provided with at least one convex bump (52), and the upper stator pole plate (31) and the lower stator pole plate (32) are both provided with at least one buckle (51), the buckle (51) on the upper stator pole plate (31) is oriented in the opposite direction to the claw pole (33) on the upper stator pole plate (31), and the buckle (51) on the lower stator pole plate (32) is oriented in the opposite direction to the claw pole (33) on the lower stator pole plate (32); wherein the convex bump (52) on the upper shell is buckled with the buckle (51) on the lower stator pole plate (32), and the convex bump (52) on the lower shell is buckled with the buckle (51) on the upper stator pole plate (31).

12. The coil component according to claim 8, characterized in that The upper shell and the lower shell are both provided with an annular rib (54), and the upper stator pole plate (31) and the lower stator pole plate (32) are both provided with at least one spring piece (53), the orientation of the spring piece (53) on the upper stator pole plate (31) is the same as the orientation of the claw pole (33) on the upper stator pole plate (31), and the orientation of the spring piece (53) on the lower stator pole plate (32) is the same as the orientation of the claw pole (33) on the lower stator pole plate (32); wherein the annular rib (54) on the upper shell is clamped with the spring piece (53) on the upper stator pole plate (31), and the annular rib (54) on the lower shell is clamped with the spring piece (53) on the lower stator pole plate (32).

13. The coil component according to claim 8, characterized in that The upper shell and the lower shell are both provided with an annular rib (54), and the upper stator pole plate (31) and the lower stator pole plate (32) are both provided with at least one spring piece (53), the spring piece (53) on the upper stator pole plate (31) is oriented in the opposite direction to the claw pole (33) on the upper stator pole plate (31), and the spring piece (53) on the lower stator pole plate (32) is oriented in the opposite direction to the claw pole (33) on the lower stator pole plate (32); wherein the annular rib (54) on the upper shell is clamped with the spring piece (53) on the lower stator pole plate (32), and the annular rib (54) on the lower shell is clamped with the spring piece (53) on the upper stator pole plate (31).

14. An electronic expansion valve, characterized in that: The electronic expansion valve comprises a valve body and the coil component according to any one of claims 1 to 13, wherein the valve body passes through a stator plate group (30) in the coil component.

Images