JP2023520290A - Electronic coil and electronic expansion valve having the same - Google Patents

Abstract

An electronic coil and an electronic expansion valve having the same, wherein the electronic coil comprises a coil body (10), a coil connection (21) provided in the coil body (10), and a coil connection (21) provided with a pin (23). A patch cord section (20) including a housing (22) provided to cover the section (21), a circuit board (30) inserted into a pin (23), and a coil connection section (21) provided with , is provided in close contact with at least a part of the circuit board (30), and supports the circuit board (30) so that a gap is formed between the coil connecting portion (21) and the circuit board (30). a support (40) used. This technical aspect can solve the technical problem that the welding performance of the circuit board of the electronic coil in the prior art is relatively poor. [Selection diagram] Fig. 1

Description

This application is a patent application with application number 202010281609.6 and titled "Electronic Coil and Electronic Expansion Valve Having the Same" filed with the State Intellectual Property Office of China on April 10, 2020. claim priority of

The present application relates to the technical field of electronic coils, and more particularly to electronic coils and electronic expansion valves having the same.

At present, electromagnetic coils can be applied in several technical fields, for example, they can be coils of electronic expansion valves in cooling systems, stator parts of stepping motors. When the electromagnetic coil is applied in the electronic expansion valve, the magnetic field generated by the energization of the electromagnetic coil interlocks with the movement of the valve core of the valve body device to control the opening and closing of the valve port. A circuit board in a conventional electronic coil is provided at the coil connection portion and is usually in close contact with the coil connection portion.

However, when such a structural design is adopted, a sufficient gap cannot be formed between the coil connection part and the circuit board, and when the circuit board is welded to the pin of the coil connection part, the solder liquid does not flow to the other side of the circuit board. It becomes difficult to flow to and affects the welding effect.

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

In order to achieve the above object, according to one aspect of the present application, the present application includes a coil body, a coil connection portion provided in the coil body and provided with a pin, and a housing provided to cover the coil connection portion. The patch cord portion, the circuit board inserted into the pin, and the coil connecting portion are provided in close contact with at least a part of the circuit board, and a gap is formed between the coil connecting portion and the circuit board. and a support used to support the circuit board.

Further, the support includes a plurality of spaced support posts.

Furthermore, the cross-section of the support post is circular or rectangular.

Furthermore, the height h of the supporting portion is 1 mm≦h≦4 mm.

Furthermore, the coil connection portion includes a housing connection portion and a wire connection portion, the wire connection portion is provided so as to protrude from the housing connection portion, the housing is provided on the housing connection portion, and the pin is provided on the wire connection portion, The wire connecting portion is further provided with a waterproof structure, which is a ring structure, and a pin is provided in the ring structure.

Further, the waterproof structure is a waterproof groove.

Furthermore, the waterproof structure is a waterproof rib.

Furthermore, 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 surrounding annular structure.

According to another aspect of the present application, there is provided an electronic expansion valve including the electronic coil provided above.

When the technical aspect of the present application is applied, a support portion is provided in the coil connection portion, and after the circuit board is inserted into the pin, the support portion is provided at a position in close contact with the support portion, and the support portion supports the circuit board, whereby the coil A gap is formed between the connecting portion and the circuit board. When welding the circuit board and the pins, the solder liquid can flow from one side of the circuit board to the other side, thereby improving the robustness of the welding between the circuit board and the pins, and further improving the welding performance. . Therefore, the technical aspects provided in the present application can solve the technical problem that the welding performance of the circuit board of the electronic coil in the prior art is relatively poor.

The drawings in the specification, which form part of this application, are intended to provide a further understanding of the application, and the schematic examples of the application and their descriptions are for interpretation of the application. It is not intended to unduly limit this application.

1 shows a front view of an electronic coil provided according to Example 1 of the present application; FIG. 1 shows a top view of an electronic coil provided according to Example 1 of the present application; FIG. 1 shows a structural schematic diagram of an electronic coil provided according to Embodiment 1 of the present application; FIG. FIG. 2 shows a structural schematic diagram of a coil body and a coil connection provided according to Embodiment 1 of the present application; 1 shows a structural schematic diagram of a housing provided according to Embodiment 1 of the present application; FIG.

Here, the above drawings include the following reference numerals.
10 coil body, 20 patch cord portion, 21 coil connection portion, 211 housing connection portion, 212 wire connection portion, 22 housing, 23 pin, 30 circuit board, 40 support portion, 50 waterproof structure.

It should be noted that the examples in this application and the features in the examples may be combined with each other unless there is a contradiction. The present application will now be described in detail with reference to examples together with the drawings.

As shown in FIGS. 1 to 5, the first embodiment of the present application includes a coil body 10, a coil connection portion 21 provided in the coil body 10 and provided with a pin 23, and a coil connection portion 21 provided to cover the coil connection portion 21. An electronic coil is provided which includes a patch cord portion 20 including a mounted housing 22 , a circuit board 30 and a support portion 40 . The circuit board 30 is inserted into the pin 23, and the support part 40 is provided in the coil connection part 21, is provided in close contact with at least a part of the circuit board 30, and is used to support the circuit board 30, and the coil The support surface of the support portion 40 is in contact with the circuit board 30 such that a gap is formed between the 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 inserted into the pin 23, and the pin 23 and the support portion 40 are provided with a space therebetween. . After the circuit board 30 is inserted into the pins 23 in this manner, the circuit board 30 is moved to a position in close contact with the support part 40 , and the circuit board 30 is supported by the support part 40 . It becomes a gap between the coil connection portion 21 and the coil connection portion 21 . Due to the presence of the gap, welding is performed in the through hole to connect the circuit board 30 and the pin 23 portion, the welding process is performed on one side of the circuit board 30, and the solder liquid flows from one side of the circuit board 30 to the other. In this way, the reliability of the welding between the circuit board 30 and the pins 23 can be ensured. Therefore, the electronic coil provided in this embodiment can solve the technical problem of the relatively poor welding reliability between the circuit board 30 and the pin 23 of the electronic coil in the prior art.

In this embodiment, the support 40 includes a plurality of spaced support posts. By adopting such a structural design, it is possible to improve the stability of the support, to stably secure the gap between the circuit board 30 and the coil connection part 21, and to prevent the solder liquid on one side of the circuit board 30. flow into the other side of the circuit board 30 through the gap between the through-hole and the pin 23, and effectively ensure the fastness of welding. Specifically, there may be four supporting columns in this embodiment, and the four supporting columns are located at the four vertices of the parallelogram. can be improved. Specifically, there are a plurality of pins 23 , two support columns are positioned above the plurality of pins 23 , and two support columns are positioned below the plurality of pins 23 .

Specifically, the cross-section of the support column may be circular or rectangular, ie, the support column may have a columnar structure or a polygonal columnar structure.

In order to provide a sufficient gap between the circuit board 30 and the coil connection portion 21, the height h of the support portion 40 is 1 mm≦h≦4 mm in this embodiment. Specifically, when the height of the support portion 40 is less than 1 mm, the gap between the circuit board 30 and the coil connection portion 21 is too small, and the solder liquid flows from one side of the circuit board 30 to the other side. become difficult. If the height of the support portion 40 exceeds 4 mm, the gap between the circuit board 30 and the coil connection portion 21 is too large, which is disadvantageous in reducing the size 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 is provided protruding from the housing connection portion 211, the housing 22 is provided on the housing connection portion 211, and the pin 23 is provided in the conductor connection portion 212 . The wire connecting portion 212 is further provided with a waterproof structure 50 having an annular structure, and the pin 23 is provided within the annular structure. With such a design, an annular structure is provided around the pins 23 and typically filled with an encapsulant (the encapsulant is typically an epoxy resin) between the housing 22 and the coil connection 21. and seal. The annular structure is mainly used to increase the contact area with the sealing material, and by improving the sealing performance of this part, the phenomenon that the sealing material and the coil connection part 21 come off can be improved. to avoid the water from flowing into the pin 23 part, thereby achieving a better waterproof effect. Specifically, the wire connecting portion 212 has an attachment surface, the support portion 40 is provided so as to protrude from the attachment surface, and the circuit board 30 is lifted by the support portion 40 .

Specifically, the waterproof structure 50 may be a waterproof groove. With such a design, when the sealing material is filled between the housing 22 and the coil connection part 21, the contact area between the sealing material and this portion is reduced due to the presence of the annular waterproof groove compared to the planar structure. can be increased, which improves sealing performance.

Specifically, the waterproof structure 50 may be a waterproof rib. With such a design, when the sealing material is filled between the housing 22 and the coil connection part 21, the contact area between the sealing material and this part is reduced due to the presence of the annular waterproof rib compared to the planar structure. can be increased, which improves sealing performance.

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

Specifically, the waterproof structure 50 may include waterproof grooves and waterproof ribs, and the waterproof grooves and waterproof ribs may be connected to form a surrounding annular structure. By adopting such a design, the combination of the waterproof grooves and waterproof ribs can increase the contact area between the coil connection portion 21 and the sealing material at this portion, thereby improving the sealing performance. Let

Specifically, by appropriately setting the depth of the waterproof groove and the height of the waterproof rib, the contact area between the waterproof structure 50 and the sealing material can be adjusted, and the sealing performance can be adjusted according to the actual demand. It becomes easy to improve better.

Example 2 of the present application provides an electronic expansion valve including the electronic coil provided in Example 1.

As can be seen from the above description, the above-described examples of the present application have achieved the technical effect of improving the robustness of welding between the circuit board and the pin portion and improving the sealing performance of the patch cord portion.

It should be 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 in accordance with the present application. As used herein, unless the context clearly indicates otherwise, singular forms are also intended to include plural forms and, furthermore, it should be understood that herein "includes" and/or When the term "comprising" is used, it means that features, steps, operations, devices, assemblies and/or combinations thereof are present.

Unless specifically stated otherwise, the relative arrangements, formulas and numerical values of the members and steps described in these examples are not intended to limit the scope of this application. At the same time, it should be understood that for convenience of explanation, the dimensions of the parts shown in the drawings are not drawn to scale. Techniques, methods and equipment known to those skilled in the art may not be described in detail, but where appropriate, such techniques, methods and equipment should be considered part of the accepted specification. . All examples suggested and described herein should be construed as illustrative only and not limiting of any specific values. Accordingly, other examples of the illustrative embodiment may have different values. It should be noted that similar symbols and letters represent similar things in the following drawings, so that once something is defined in one drawing, it need not be further described in subsequent drawings. be.

In the description of this application, it should generally be understood that orientations such as "front, back, top, bottom, left, right", "lateral, longitudinal, vertical, horizontal" and "top, bottom", etc. Orientation or positional relationships indicated in terms are based on the orientations or positional relationships shown in the drawings and are merely for the purpose of facilitating and simplifying the description of the present application, unless otherwise stated. do not indicate and imply that the indicated device or element necessarily has a particular orientation or is configured and operated in a particular orientation, and thus limits the scope of protection of this application. Instead, the azimuth terms "in, out" are in, out relative to the contours of each member itself.

For convenience of description, spatially relative terms such as "on", "above", "on top of", "above", etc., are herein used to refer to one device or feature as shown in the drawings. can be used to describe the spatial relationship between a device and other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations in use or operation other than the orientation depicted in the drawings of the device. For example, when a device in a drawing is turned upside down, a device “above another device or structure” or “above another device or structure” is described, and then “below another device or structure” or It will be positioned "under other devices or structures". Thus, the exemplary term "above" can include the two orientations "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or positioned in other orientations) and corresponding interpretations of the relative spatial descriptions used herein can be made.

Further, it should be noted that the use of terms such as "first," "second," etc. to define components is merely for the purpose of readily distinguishing corresponding components, unless otherwise stated. , the above terms have no special meaning and should not be understood as limiting the scope of protection of this application.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application, and those skilled in the art may make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall all fall within the protection scope of this application.

Claims (10)

a coil body (10);
A patch cord part (20) provided in the coil body (10) and including a coil connection part (21) provided with a pin (23) and a housing (22) provided so as to cover the coil connection part (21) )and,
a circuit board (30) inserted into the pin (23);
It is provided on the coil connection portion (21) in close contact with at least a part of the circuit board (30) so that a gap is formed between the coil connection portion (21) and the circuit board (30). a support (40) used to support the circuit board (30). The electronic coil of claim 1, wherein the support (40) comprises a plurality of spaced support posts. 3. The electronic coil of claim 2, wherein the cross section of the support post is circular or rectangular. Electronic coil according to claim 1, wherein the height h of the support (40) is 1 mm ≤ h ≤ 4 mm. The coil connection portion (21) includes a housing connection portion (211) and a conductor connection portion (212), and the conductor connection portion (212) is provided so as to protrude from the housing connection portion (211). 22) is provided at the housing connecting portion (211), the pin (23) is provided at the conducting wire connecting portion (212), and the conducting wire connecting portion (212) has a waterproof structure having a ring structure. 2. The electronic coil of claim 1, further comprising (50), said pin (23) being provided within said annular structure. Electronic coil according to claim 5, wherein the waterproof structure (50) is a waterproof groove. Electronic coil according to claim 5, wherein the waterproof structure (50) is a waterproof rib. 6. The electronic coil of claim 5, wherein the waterproof structure (50) has a triangular or rectangular cross-section. 6. The electronic coil of claim 5, wherein the waterproof structure (50) comprises a waterproof groove and a waterproof rib, the waterproof groove and the waterproof rib being connected to form the annular structure in a surrounding manner. An electronic expansion valve comprising an electronic coil according to any one of claims 1-9.

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