WO2021203925A1

WO2021203925A1 - Electronic coil and electronic expansion valve having same

Info

Publication number: WO2021203925A1
Application number: PCT/CN2021/081167
Authority: WO
Inventors: 陈勇好; 郑利峰; 张积友
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2020-04-10
Filing date: 2021-03-16
Publication date: 2021-10-14
Also published as: KR20220160074A; JP2023520290A; CN113517105B; CN113517105A

Abstract

Disclosed are an electronic coil and an electronic expansion valve having same. The electronic coil comprises: a coil main body (10); a wire plug part (20), which is arranged on the coil main body (10), wherein the wire plug part (20) comprises a coil-connecting part (21) and a housing (22), a pin (23) is arranged on the coil-connecting part (21), and the housing (22) covers the coil-connecting part (21); a circuit board (30), wherein the circuit board (30) is arranged on the pin (23) in a penetrating manner; and a supporting part (40), which is arranged on the coil-connecting part (21), wherein the supporting part (40) is configured to be attached to at least part of the circuit board (30), and the supporting part (40) is used for supporting the circuit board (30), such that a gap is present between the coil-connecting part (21) and the circuit board (30). The technical solution can solve the technical problem of the poor welding performance of a circuit board of an electronic coil in the prior art.

Description

Electronic coil and electronic expansion valve with the same

This application claims the priority of the patent application filed to the State Intellectual Property Office of China on April 10, 2020, with the application number of 202010281609.6 and the invention title of "Electronic Coil and Electronic Expansion Valve with the same".

Technical field

This application relates to the technical field of electronic coils, and in particular to an electronic coil and an electronic expansion valve having the same.

Background technique

At present, electromagnetic coils can be used in multiple technical fields. For example, the electromagnetic coil can be used as the coil of the electronic expansion valve of the refrigeration system, and the electromagnetic coil can be used as the stator part of the stepping motor. When the solenoid coil is used in the electronic expansion valve, the magnetic field generated by the solenoid coil will drive the valve core of the valve body device to move to control the opening or closing of the valve port. The circuit board in the existing electronic coil is arranged on the coil connection part. Generally, the circuit board is attached to the coil connection part.

However, with such a structural arrangement, there is not enough gap between the coil connection part and the circuit board. When the circuit board is soldered to the pins on the coil connection part, it is inconvenient for the solder to flow to the other side of the circuit board. , Thus affecting the welding effect.

Summary of the invention

The main purpose of this application is to provide an electronic coil and an electronic expansion valve having the same, so as to solve the technical problem of poor welding performance of the circuit board of the electronic coil in the prior art.

In order to achieve the above object, according to one aspect of the present application, an electronic coil is provided, which includes: a coil body; There are pins, the cover is arranged on the coil connection part; the circuit board, the circuit board is inserted through the pins; the support part is arranged on the coil connection part, the support part is arranged in close contact with at least part of the circuit board, the support part Used to support the circuit board so that there is a gap between the coil connection part and the circuit board.

Further, the supporting part includes a plurality of supporting columns, and the plurality of supporting columns are arranged at intervals.

Further, the cross section of the support column may be circular or rectangular.

Further, the height of the support part is h, and 1mm≤h≤4mm.

Further, the coil connection part includes a cover connection part and a wire connection part, the wire connection part protruding from the cover connection part is arranged, the cover is arranged on the cover connection part, the pin is arranged on the wire connection part; the wire connection part A waterproof structure is also provided on the upper surface, the waterproof structure is a ring structure, and the pins are located in the ring structure.

Further, the waterproof structure is a waterproof groove.

Further, the waterproof structure is a waterproof rib.

Further, the cross section of the waterproof structure is triangular or rectangular.

Further, the waterproof structure includes a waterproof groove and a waterproof rib, and the waterproof groove and the waterproof rib are connected to form a ring structure.

According to another aspect of the present application, an electronic expansion valve is provided. The electronic expansion valve includes an electronic coil, and the electronic coil is the electronic coil provided above.

Applying the technical solution of the present application, by providing a support part on the coil connection part, after the circuit board is threaded on the pin, the circuit board is arranged at a position where it is attached to the support part, and the support part supports the circuit board. , There is a gap between the coil connection part and the circuit board. When the circuit board and the pins are welded, the welding liquid can flow from one side of the circuit board to the other side, so that the welding reliability of the circuit board and the pins can be improved, thereby improving the welding performance. Therefore, the technical solution provided by the present application can solve the technical problem of poor welding performance of the circuit board of the electronic coil in the prior art.

Description of the drawings

The drawings of the specification forming a part of the application are used to provide a further understanding of the application, and the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Fig. 1 shows a front view of an electronic coil provided according to the first embodiment of the present application;

Fig. 2 shows a top view of the electronic coil provided according to the first embodiment of the present application;

Fig. 3 shows a schematic structural diagram of an electronic coil provided according to the first embodiment of the present application;

FIG. 4 shows a schematic diagram of the structure of the coil body and the coil connection part provided according to the first embodiment of the present application; and

Fig. 5 shows a schematic structural diagram of a cover provided according to the first embodiment of the present application.

Among them, the above drawings include the following reference signs:

10. Coil body; 20. Insertion part; 21. Coil connection part; 211. Cover connection part; 212. Wire connection part; 22. Cover; 23. Pin; 30. Circuit board; 40. Support part; 50. Waterproof structure.

Detailed ways

It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present application will be described in detail with reference to the drawings and in conjunction with the embodiments.

As shown in Figures 1 to 5, the first embodiment of the present application provides an electronic coil. The electronic coil includes a coil body 10, a wire insertion portion 20, a circuit board 30, and a support portion 40. The wire insertion portion 20 is disposed on the coil. On the main body 10, the wire insertion portion 20 includes a coil connection portion 21 and a cover 22, the coil connection portion 21 is provided with a pin 23, and the cover 22 is provided on the coil connection portion 21. The circuit board 30 passes through the pins 23, the support portion 40 is provided on the coil connection portion 21, and the support portion 40 is attached to at least part of the circuit board 30. The support portion 40 is used to support the circuit board 30. The supporting surface abuts the circuit board 30 so that there is a gap between the coil connection portion 21 and the circuit board 30.

Specifically, the circuit board 30 in this embodiment is provided with a through hole, the through hole is pierced through the pin 23, and the pin 23 and the supporting portion 40 are spaced apart. In this way, after the circuit board 30 is threaded on the pins 23, the circuit board 30 is moved to a position where it is attached to the support portion 40 to support the circuit board 30 through the support portion 40. The length of the support portion 40 is The gap between the circuit board 30 and the coil connection portion 21. Due to the existence of this gap, in order to connect the circuit board 30 and the pin 23, soldering is performed at the through hole, and the soldering operation is performed on the side of the circuit board 30, and the soldering liquid will flow from the side of the circuit board 30 To the other side, this will ensure the reliability of the soldering of the circuit board 30 and the pins 23. Therefore, the electronic coil provided by this embodiment can solve the technical problem of poor welding reliability between the circuit board 30 and the pins 23 of the electronic coil in the prior art.

In this embodiment, the supporting portion 40 includes a plurality of supporting pillars, and the plurality of supporting pillars are arranged at intervals. Adopting such a structural arrangement can improve the stability of the support to stably ensure that there is a gap between the circuit board 30 and the coil connecting portion 21, so as to better ensure that the solder on the side of the circuit board 30 can pass through the through holes and the pins. The gap between 23 flows into the other side of the circuit board 30, thereby effectively ensuring the reliability of welding. Specifically, the number of support columns in this embodiment may be four, and the four support columns are located at the four vertex corners of the parallelogram. With such a structural layout, the stability of the support can be improved. Specifically, there are multiple pins 23, two support columns are located on the upper side of the multiple pins 23, and two support columns are located on the lower side of the multiple pins 23.

Specifically, the cross section of the support column may be circular or rectangular, that is, the support column may be a cylindrical structure or a polygonal column structure.

In order to have a sufficient gap between the circuit board 30 and the coil connecting portion 21, the height of the support portion 40 in this embodiment is h, 1mm≦h≦4mm. Specifically, when the height of the supporting portion 40 is less than 1 mm, the gap between the circuit board 30 and the coil connecting portion 21 is too small, which makes it inconvenient for the solder to flow from one side of the circuit board 30 to the other side; when the supporting portion When the height of 40 is greater than 4 mm, the gap between the circuit board 30 and the coil connecting portion 21 is too large, which is not conducive to the compactness of the entire structure.

In this embodiment, the coil connection portion 21 includes a housing connection portion 211 and a wire connection portion 212. The wire connection portion 212 protrudes from the housing connection portion 211, and the housing 22 is provided on the housing connection portion 211. 23 is provided on the wire connection part 212. The wire connecting portion 212 is also provided with a waterproof structure 50, the waterproof structure 50 is a ring structure, and the pin 23 is located in the ring structure. With this arrangement, the ring structure is arranged around a plurality of pins 23. Generally, a sealing material (the sealing material is generally epoxy resin) is filled between the casing 22 and the coil connecting portion 21 for sealing. The ring structure is mainly used to increase the contact area with the sealing material to improve the sealing performance here, so as to better avoid the phenomenon of shedding between the sealing material and the coil connecting portion 21, thereby better functioning Waterproof function to prevent water from flowing into the 23 part of the pin. Specifically, the wire connecting portion 212 has a mounting surface, and the supporting portion 40 is arranged to protrude from the mounting surface to raise the circuit board 30 through the supporting portion 40.

Specifically, the waterproof structure 50 may be a waterproof groove. With this arrangement, when the sealing material is filled between the cover 22 and the coil connecting portion 21, compared to the planar structure, due to the existence of the annular waterproof groove, the contact area between the sealing material and the place can be increased, thereby increasing Improved sealing performance.

Specifically, the waterproof structure 50 may be a waterproof rib. With this arrangement, when the sealing material is filled between the cover 22 and the coil connecting portion 21, compared with the planar structure, due to the existence of the annular rib, the contact area between the sealing material and the place can be increased, thereby increasing Improved sealing performance.

Specifically, the cross section of the waterproof structure 50 is triangular or rectangular. A suitable cross-sectional shape of the waterproof structure 50 can be selected according to the actual internal structure of the coil body 10 to optimize the internal structure.

Specifically, the waterproof structure 50 may further include a waterproof groove and a waterproof rib, and the waterproof groove and the waterproof rib are connected to form a ring structure. With this arrangement, through the combination of the waterproof groove and the waterproof rib, the contact area between the coil connecting portion 21 and the sealing material can also be increased, thereby better improving the sealing performance.

Specifically, it is possible to adjust the contact area between the waterproof structure 50 and the sealing material by setting a reasonable depth of the waterproof groove and the height of the waterproof rib, so as to better improve the sealing performance according to actual requirements.

The second embodiment of the present application provides an electronic expansion valve. The electronic expansion valve includes an electronic coil, and the electronic coil is the electronic coil provided in the first embodiment.

From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: improving the welding reliability of the circuit board and the pin portion, and improving the sealing performance of the wire plug portion.

It should be noted that the terms used here 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 also be understood that when the terms "comprising" and/or "including" are used in this specification, they indicate There are features, steps, operations, devices, components, and/or combinations thereof.

Unless specifically stated otherwise, the relative arrangement of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The technologies, methods, and equipment known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be regarded as part of the authorization specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

In the description of this application, it needs to be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" and other directions indicate the orientation Or positional relationship is usually based on the positional or positional relationship shown in the drawings, which is only used to facilitate the description of the application and simplify the description. Unless otherwise stated, these positional words do not indicate or imply the pointed device or element It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the scope of protection of the present application; the orientation word "inside, outside" refers to the inside and outside relative to the contour of each component itself.

For ease of description, spatial relative terms can be used here, such as "above", "above", "above the surface", "above", etc., to describe as shown in the figure Shows the spatial positional relationship between one device or feature and other devices or features. It should be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described in the figure. For example, if the device in the drawing is turned upside down, then a device described as "above other devices or structures" or "above other devices or structures" will then be positioned as "below the other devices or structures" or "on Under other devices or structures". Thus, the exemplary term "above" may include both orientations "above" and "below". The device can also be positioned in other different ways (rotated by 90 degrees or in other orientations), and the relative description of the space used here will be explained accordingly.

In addition, it should be noted that the use of terms such as “first” and “second” to define parts is only for the convenience of distinguishing the corresponding parts. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood. To limit the scope of protection of this application.

The above descriptions are only preferred embodiments of the application, and are not intended to limit the application. For those skilled in the art, the application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included in the protection scope of this application.

Claims

An electronic coil, characterized in that it comprises:

Coil body (10);

The wire insertion portion (20) is arranged on the coil body (10), the wire insertion portion (20) includes a coil connection portion (21) and a cover (22), and the coil connection portion (21) is provided with There is a pin (23), and the cover (22) is arranged on the coil connection part (21);

A circuit board (30), the circuit board (30) is threaded on the pin (23);

The supporting portion (40) is arranged on the coil connecting portion (21), and the supporting portion (40) is arranged in close contact with at least part of the circuit board (30), and the supporting portion (40) is used for supporting The circuit board (30) is such that there is a gap between the coil connecting portion (21) and the circuit board (30).
The electronic coil according to claim 1, wherein the supporting portion (40) comprises a plurality of supporting pillars, and the plurality of supporting pillars are arranged at intervals.
The electronic coil according to claim 2, wherein the cross section of the support column can be circular or rectangular.
The electronic coil according to claim 1, wherein the height of the supporting portion (40) is h, and 1mm≤h≤4mm.
The electronic coil according to claim 1, wherein the coil connection portion (21) comprises a casing connection portion (211) and a wire connection portion (212), and the wire connection portion (212) protrudes The cover connecting portion (211) is provided, the cover (22) is provided on the cover connecting portion (211), and the pin (23) is provided on the wire connecting portion (212); The wire connecting portion (212) is also provided with a waterproof structure (50), the waterproof structure (50) is a ring structure, and the pin (23) is located in the ring structure.
The electronic coil according to claim 5, wherein the waterproof structure (50) is a waterproof groove.
The electronic coil according to claim 5, wherein the waterproof structure (50) is a waterproof rib.
The electronic coil according to claim 5, characterized in that the cross section of the waterproof structure (50) is triangular or rectangular.
The electronic coil according to claim 5, wherein the waterproof structure (50) comprises a waterproof groove and a waterproof rib, and the waterproof groove and the waterproof rib are connected to form the annular structure.
An electronic expansion valve, characterized in that the electronic expansion valve comprises an electronic coil, and the electronic coil is the electronic coil according to any one of claims 1-9.