CN214626535U

CN214626535U - Electromagnetic coil device and electronic expansion valve with same

Info

Publication number: CN214626535U
Application number: CN202120284787.4U
Authority: CN
Inventors: 余远航; 康志军; 曾庆军
Original assignee: Zhejiang Dunan Artificial Environment Co Ltd
Current assignee: Zhejiang Dunan Artificial Environment Co Ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-11-05
Anticipated expiration: 2031-02-01

Abstract

The utility model provides an electromagnetic coil device and have its electronic expansion valve, wherein, electromagnetic coil device, include: the electromagnetic coil structure comprises a shell, a coil and a polar plate, wherein the coil is arranged in a space enclosed by the shell and the polar plate, the shell comprises a shell body and a first claw pole positioned on the inner side of the coil, and the polar plate comprises a polar plate body and a second claw pole positioned on the inner side of the coil; the coating, the cladding sets up in the outside of shell body, polar plate body, first claw utmost point and second claw utmost point. The technical scheme of this application has solved the inside problem of easily damaging that wets of coil among the correlation technique effectively.

Description

Electromagnetic coil device and electronic expansion valve with same

Technical Field

The utility model relates to a refrigeration control technical field particularly, relates to an electromagnetic coil device and have its electronic expansion valve.

Background

In refrigeration systems, it is often necessary to use a solenoid. For example, in an electronic expansion valve, an electromagnetic coil is used as a stator, and electricity is supplied to drive a rotor in the electronic expansion valve to rotate, so that the purpose of controlling the flow rate of a refrigerant is achieved. According to the invention patent application, the publication number is CN 111255939A. As shown in fig. 1, the electromagnetic coil generally includes a stator housing 1, an electromagnetic pole plate 2, a coil 3, and an injection molded body 4. The stator housing 1 and the electromagnetic pole plate 2 each have claw poles 5. The electromagnetic coil is processed and molded in an injection molding mode, namely the outer side of the stator shell is encapsulated after injection molding, and gaps between the stator shell and claw poles of the electromagnetic pole plate are filled.

However, the claw pole of the electromagnetic coil is exposed in the air, the claw pole and the injection molding body are not completely sealed, the sealing effect is realized by a waterproof structure on the internal coil frame, and the coil is easy to damage due to the fact that the waterproof structure is unreasonable in design.

SUMMERY OF THE UTILITY MODEL

An object of the present invention is to provide an electromagnetic coil device and an electronic expansion valve having the same, so as to solve the problem of easy damage caused by the damp inside the coil in the related art.

In order to achieve the above object, according to an aspect of the present invention, there is provided an electromagnetic coil device including: the electromagnetic coil structure comprises a shell, a coil and a polar plate, wherein the coil is arranged in a space enclosed by the shell and the polar plate, the shell comprises a shell body and a first claw pole positioned on the inner side of the coil, and the polar plate comprises a polar plate body and a second claw pole positioned on the inner side of the coil; the coating, the cladding sets up in the outside of shell body, polar plate body, first claw utmost point and second claw utmost point.

Further, the coating layer comprises an inner side wall and an outer side wall, the thickness of the part of the coating layer corresponding to the first claw pole is smaller than that of the outer side wall of the coating layer, and/or the thickness of the part of the coating layer corresponding to the second claw pole is smaller than that of the outer side wall of the coating layer.

Further, the coating layer is an injection molding layer.

Further, a filling part is arranged at the gap between the shell and the coil.

Further, the shell is provided with an injection molding through hole.

Further, the first claw pole and the second claw pole are both multiple, and the multiple first claw poles and the multiple second claw poles are sequentially and alternately arranged along the circumferential direction of the coil.

Further, the housing body includes an annular end wall and an annular side wall disposed at an outer edge of the annular end wall, each first claw pole disposed at an inner edge of the annular end wall; the polar plate body is the annular plate, and the setting of second claw utmost point is in the interior border department of annular plate.

Furthermore, the electromagnetic coil device also comprises a wire frame which is arranged outside the coil and positioned in the shell and the polar plate.

Further, the electromagnetic coil structure comprises two electromagnetic coil structures which are arranged in an overlapping mode, and the polar plate of one electromagnetic coil structure is arranged adjacent to the polar plate of the other electromagnetic coil structure.

According to another aspect of the present invention, there is provided an electronic expansion valve, comprising a solenoid device, wherein the solenoid device is the above-mentioned solenoid device.

Use the technical scheme of the utility model, solenoid device includes: an electromagnetic coil structure and a coating layer. The electromagnetic coil structure comprises a shell, a coil and a polar plate. The coil is arranged in a space defined by the shell and the polar plate, the shell comprises a shell body and a first claw pole positioned on the inner side of the coil, and the polar plate comprises a polar plate body and a second claw pole positioned on the inner side of the coil. The coating cladding sets up in shell body, polar plate body, the outside of first claw utmost point and second claw utmost point. Like this, the solenoid structure is wrapped up by the coating is whole, and the first claw utmost point of separation and the second claw utmost point all with the direct contact of air, avoid first claw utmost point and second claw utmost point to expose in the air to realize insulating and sealed effect, avoid coil inside to wet. Therefore, the technical scheme of the application effectively solves the problem that the interior of the coil in the related art is easy to damage due to moisture.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a partial sectional view schematically showing a solenoid coil in the related art;

figure 2 shows a schematic view of a partial cross-sectional structure of an embodiment of an electromagnetic coil device according to the present invention; and

fig. 3 shows a schematic partial cross-sectional structure of the two solenoid structures of fig. 2.

Wherein the figures include the following reference numerals:

1. a stator housing; 2. an electromagnetic pole plate; 3. a coil; 4. an injection molded body; 5. a claw pole; 10. an electromagnetic coil structure; 11. a housing; 111. a first claw pole; 112. a housing body; 12. a coil; 13. a polar plate; 131. a second claw pole; 132. a pole plate body; 14. a wire frame; 20. and (4) coating.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 2 and 3, the electromagnetic coil device of the present embodiment includes: a solenoid structure 10 and a cover layer 20. The electromagnetic coil structure 10 includes a case 11, a coil 12, and a pole plate 13. In the present embodiment, the coil 12 is disposed in a space enclosed by the case 11 and the pole plate 13, the case 11 includes a case body 112 and a first claw pole 111 located inside the coil 12, and the pole plate 13 includes a pole plate body 132 and a second claw pole 131 located inside the coil 12. The coating layer 20 is disposed outside the case body 112, the plate body 132, the first claw pole 111, and the second claw pole 131.

With the solution of the present embodiment, the first claw pole 111 and the second claw pole 131 cooperate with the coil 12 to generate a magnetic field. The coating layer 20 is coated and arranged outside the shell body 112, the pole plate body 132, the first claw pole 111 and the second claw pole 131. Thus, the electromagnetic coil structure 10 is completely wrapped by the wrapping layer 20, and the first claw pole 111 and the second claw pole 131 are isolated from being in direct contact with air, so that the first claw pole 111 and the second claw pole 131 are prevented from being exposed in the air, an insulation and sealing effect is achieved, and the interior of the coil is prevented from being affected with damp. Therefore, the technical scheme of the embodiment effectively solves the problem that the interior of the coil in the related art is easy to damage due to moisture.

The material of the coating layer 20 of the present embodiment is preferably resin.

As shown in fig. 2 and 3, the clad 20 includes an inner sidewall and an outer sidewall, and a thickness of a portion of the clad 20 corresponding to the first claw pole 111 is smaller than a thickness of the outer sidewall of the clad 20. The thickness of the portion of the clad 20 corresponding to the second claw pole 131 is smaller than the thickness of the outer sidewall of the clad 20. In this way, on the one hand, the insulation and sealing effect of the coating layer 20 can be ensured, and on the other hand, the space occupied inside the electromagnetic coil structure 10 can be reduced.

Of course, in the embodiment not shown in the figures, the cladding layer comprises an inner side wall and an outer side wall, and the thickness of the portion of the cladding layer corresponding to the first claw pole is smaller than the thickness of the outer side wall of the cladding layer. Or the thickness of the part of the coating layer corresponding to the second claw pole is smaller than that of the outer side wall of the coating layer.

As shown in fig. 2 and 3, the cover layer 20 is an injection molded layer for ease of processing. In this way, the electromagnetic coil structure 10 and the coating layer 20 are injection molded together by an integral injection molding process. Meanwhile, the injection molding layer can block the electromagnetic coil structure 10 from being in direct contact with air, and a good insulation effect is achieved. In other embodiments, the coating layer can also be formed by two-time injection molding; or the pouring gate is formed and reserved at one time, and then the means of filling and sealing the pouring gate is adopted to realize the effect of complete coating.

As shown in fig. 2 and 3, a filling portion is provided at the gap between the case 11 and the coil 12. The filling part is provided so that there is no gap inside the electromagnetic coil structure 10, thereby ensuring a contact effect between the case 11, the coil 12, and the pole plate 13.

It should be noted that the materials of the filling portion and the covering layer are the same, and the filling portion is formed in the gap between the case 11 and the coil 12 in the process of integrally injection-molding the electromagnetic coil structure 10 and the covering layer 20. Of course, the materials of the filling part and the coating layer may be different.

As shown in fig. 2 and 3, the housing 11 is provided with a through-hole (not shown) for injection molding in order to facilitate introduction of the filling portion into the electromagnetic coil structure 10. The injection molding through hole (sprue gate) of the present embodiment may be a notch or the entire through hole.

As shown in fig. 2 and 3, each of the first claw pole 111 and the second claw pole 131 is provided in plurality, and the plurality of first claw poles 111 and the plurality of second claw poles 131 are alternately provided in order in the circumferential direction of the coil 12. The first plurality of claw poles 111 and the second plurality of claw poles 131 are each engaged with the coil 12 to enable more conversion energy to be generated in the magnetic field generated by the electromagnetic coil device.

As shown in fig. 2 and 3, the housing body 112 includes an annular end wall and an annular side wall provided at an outer edge of the annular end wall, and each first claw pole 111 is provided at an inner edge of the annular end wall. The plate body 132 is a ring plate, and the second claw pole 131 is disposed at an inner edge of the ring plate. Thus, the first claw pole 111, the annular end wall, the annular side wall, the second claw pole 131, and the annular plate collectively enclose a space that accommodates the coil 12.

As shown in fig. 2 and 3, the electromagnetic coil device further includes a bobbin 14, and the bobbin 14 is covered on the outside of the coil 12 and is located inside the case 11 and the pole plate 13. The solenoid structure 10 includes two stacked bobbins 14 in an upper solenoid structure 10 capable of supporting the coil 12 and the case 11, and the bobbin 14 in a lower solenoid structure 10 capable of supporting the coil 12 and the pole plate 13, and also capable of supporting an upper solenoid structure 10. The bobbin 14 of this embodiment is preferably an annular groove structure.

As shown in fig. 2 and 3, for convenience of manufacturing and shaping and using requirements, the electromagnetic coil structure 10 includes two electromagnetic coil structures stacked, and the pole plate 13 of one electromagnetic coil structure 10 is disposed adjacent to the pole plate 13 of the other electromagnetic coil structure 10.

The application also provides an electronic expansion valve, which comprises an electromagnetic coil device, wherein the electromagnetic coil device is the electromagnetic coil device. Since the electromagnetic coil device can solve the problem that the interior of the coil is easily damaged due to moisture in the related art, the electronic expansion valve with the electromagnetic coil device can solve the same problem.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic coil device, comprising:

the electromagnetic coil structure (10) comprises a shell (11), a coil (12) and a polar plate (13), wherein the coil (12) is arranged in a space enclosed by the shell (11) and the polar plate (13), the shell (11) comprises a shell body (112) and a first claw pole (111) located on the inner side of the coil (12), and the polar plate (13) comprises a polar plate body (132) and a second claw pole (131) located on the inner side of the coil (12);

and a coating layer (20) which is provided outside the case body (112), the electrode plate body (132), the first claw pole (111), and the second claw pole (131) in a coating manner.

2. The electromagnetic coil device according to claim 1, characterized in that the cladding layer (20) comprises an inner side wall and an outer side wall, the thickness of the portion of the cladding layer (20) corresponding to the first claw pole (111) is smaller than the thickness of the outer side wall of the cladding layer (20), and/or the thickness of the portion of the cladding layer (20) corresponding to the second claw pole (131) is smaller than the thickness of the outer side wall of the cladding layer (20).

3. The electromagnetic coil device according to claim 1, characterized in that the coating layer (20) is an injection molded layer.

4. The electromagnetic coil device according to claim 1, characterized in that a filling portion is provided at a gap between the case (11) and the coil (12).

5. The electromagnetic coil device according to any one of claims 1 to 4, characterized in that the housing (11) is provided with injection-molded through-holes.

6. The electromagnetic coil device according to any one of claims 1 to 4, wherein each of the first claw pole (111) and the second claw pole (131) is plural, and the plural first claw poles (111) and the plural second claw poles (131) are alternately arranged in order in a circumferential direction of the coil (12).

7. The electromagnetic coil device according to any one of claims 1 to 4,

the housing body (112) comprises an annular end wall and an annular side wall arranged at an outer edge of the annular end wall, each first claw pole (111) being arranged at an inner edge of the annular end wall;

the polar plate body (132) is the annular plate, second claw utmost point (131) set up the interior border department of annular plate.

8. The electromagnetic coil device according to any one of claims 1 to 4, characterized in that the electromagnetic coil device further comprises a bobbin (14), the bobbin (14) being housed outside the coil (12) and inside the case (11) and the pole plate (13).

9. The electromagnetic coil arrangement according to any one of claims 1 to 4, characterized in that the electromagnetic coil structure (10) comprises two arranged one above the other, the pole plates (13) of one electromagnetic coil structure (10) being arranged adjacent to the pole plates (13) of the other electromagnetic coil structure (10).

10. An electronic expansion valve comprising a solenoid device, wherein said solenoid device is as claimed in any one of claims 1 to 9.