CN216487631U - Coil assembly and electronic expansion valve with same - Google Patents

Abstract

The utility model provides a coil pack and have its electronic expansion valve, coil pack includes: the body is provided with a first accommodating cavity; the connecting seat is provided with a connecting surface, the connecting seat is arranged in the first accommodating cavity, a contact pin is arranged on the connecting seat, and one end of the contact pin protrudes out of the connecting surface; the circuit board sets up at the first intracavity that holds, has the welding hole on the circuit board, and the contact pin is worn to establish in the welding hole, and the circuit board has relative infiltration face and the face of welding that sets up, and the infiltration face is close to the connecting seat setting, and the distance between infiltration face and the connection face is A, and A is greater than or equal to 0.5 mm. The problem of pin and circuit board connection unstable among the prior art is solved.

Description

Coil assembly and electronic expansion valve with same

Technical Field

The utility model relates to a coil technical field particularly, relates to a coil subassembly and have its electronic expansion valve.

Background

At present, in an existing electronic expansion valve, a coil assembly includes a connecting seat and a circuit board, a pin is disposed on the connecting seat, and the pin penetrates through the circuit board and is connected with the circuit board through solder such as tin. In the prior art, the connecting seat is connected with the circuit board in an abutting mode, so that solder cannot flow to two side faces of the circuit board along the contact pin, connection of the contact pin and the circuit board is unstable, the contact pin is easily separated from the circuit board, and the failure rate of the coil assembly is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a coil assembly and have its electronic expansion valve to the unstable problem is connected with the circuit board to the contact pin among the solution prior art.

According to an aspect of the utility model, a coil component is provided, include: the body is provided with a first accommodating cavity; the connecting seat is provided with a connecting surface, the connecting seat is arranged in the first accommodating cavity, a contact pin is arranged on the connecting seat, and one end of the contact pin protrudes out of the connecting surface; the circuit board sets up at the first intracavity that holds, has the welding hole on the circuit board, and the contact pin is worn to establish in the welding hole, and the circuit board has relative infiltration face and the face of welding that sets up, and the infiltration face is close to the connecting seat setting, and the distance between infiltration face and the connection face is A, and A is greater than or equal to 0.5 mm.

Furthermore, the first accommodating cavity is filled with insulating colloid. Insulating colloid can protect contact pin and circuit board, avoids steam, impurity to get into first the intracavity that holds.

Furthermore, the distance A between the penetration surface and the connection surface is less than or equal to 2 mm. Make the first inner space who holds the chamber less like this, can make and can not produce more gas pocket in the insulating colloid when filling insulating colloid to first chamber that holds to insulating colloid's insulating effect has been improved.

Further, be provided with spacing portion on the connecting seat, the terminal surface protrusion of keeping away from the body of spacing portion is connected the face and is set up, spacing portion and circuit board butt to restriction infiltration face and the distance of being connected between the face. Set up spacing portion, can prevent that the circuit board is close to the connecting seat, and conveniently install the circuit board.

Furthermore, the limiting part comprises at least one limiting block, the limiting block is arranged on the periphery of the connecting surface, and the limiting block is abutted to the circuit board. The limiting block is arranged on the connecting surface, and the structure is simple and the occupied space is small.

Further, the body includes plastic envelope shell and lid, and lid and plastic envelope shell's lateral wall sealing connection, the connecting seat setting has the interval between lid and the plastic envelope shell on the lateral wall of plastic envelope shell, and the interval forms first holding chamber. And after the connecting seat and the circuit board are installed, connecting the cover body with the side wall of the plastic package shell.

Furthermore, a second accommodating cavity is formed in the plastic package shell, and the first accommodating cavity and the second accommodating cavity are arranged at intervals; the coil assembly further comprises a winding, the winding is arranged in the second accommodating cavity, and the winding is electrically connected with the other end of the contact pin. With first chamber and the second chamber interval setting that holds, can avoid winding and circuit board mutual interference.

Furthermore, the distance between the welding surface and the inner wall of the cover body is B, and B is more than or equal to 5mm and more than or equal to 0.8 mm. So set up, can make the great and inside gas pocket less of thickness of insulating colloid to make insulating colloid play better insulating properties to contact pin and circuit board.

According to an aspect of the utility model, an electronic expansion valve is provided, including above-mentioned coil pack. The electronic expansion valve comprising the coil assembly has the advantages of good structural stability, long service life of parts, small overall size and the like.

Use the technical scheme of the utility model, the connecting seat has contact pin and contact pin protrusion and sets up in connecting the face, has the welding hole on the circuit board, and the contact pin is worn to establish in the welding hole, and the infiltration face of circuit board is close to the connecting seat setting, and the infiltration face is A with the distance of being connected between the face, and A is greater than or equal to 0.5 mm. If the distance between the penetrating surface and the connecting surface is A less than 0.5mm, when liquid solder flows from the welding surface to the penetrating surface, the connecting surface blocks the liquid solder from flowing on the penetrating surface, so that the solder on the penetrating surface is less, the connection between the contact pin and the circuit board is unstable, the structural stability of the coil assembly is reduced, and the failure rate of the coil assembly is higher. And set up the distance between infiltration face and the connection face to be more than or equal to 0.5mm, can make the better welding face of liquid solder flow to the infiltration face from to make the solder can connect contact pin and circuit board more firmly, and then can improve the holistic structural stability of coil pack and coil pack's life.

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 schematic structural diagram of a coil assembly according to an embodiment of the present invention;

FIG. 2 shows a partial enlarged view of portion A of FIG. 1;

fig. 3 shows a schematic structural diagram of a coil assembly according to a second embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a body; 11. plastic packaging the shell; 12. a cover body; 20. a connecting seat; 21. a connecting surface; 22. inserting a pin; 30. a circuit board; 31. welding the hole; 32. a penetration surface; 33. welding a surface; 40. insulating colloid; 50. and a limiting block.

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.

As shown in fig. 1 and 2, an embodiment of the present invention provides a coil assembly, which includes a body 10, a connecting seat 20, and a circuit board 30. The body 10 has a first housing cavity; the connecting seat 20 is provided with a connecting surface 21, the connecting seat 20 is arranged in the first accommodating cavity, a contact pin 22 is arranged on the connecting seat 20, and one end of the contact pin 22 protrudes out of the connecting surface 21; the circuit board 30 sets up in first holding the intracavity, has welding hole 31 on the circuit board 30, and the contact pin 22 is worn to establish in welding hole 31, and circuit board 30 has relative infiltration face 32 and the welding face 33 that sets up, and infiltration face 32 is close to the setting of connecting seat 20, and the distance between infiltration face 32 and the connection face 21 is A, and A is greater than or equal to 0.5 mm. The soldering holes 31 are filled with solder to electrically connect the pins 22 with the circuit board 30. In practice, liquid solder is generally filled into the soldering hole 31 from the soldering surface 33, and the liquid solder flows from the soldering hole 31 to the penetration surface 32, so that the pin 22 and the circuit board 30 are firmly connected. If the distance a between the penetrating surface 32 and the connecting surface 21 is less than 0.5mm, when the liquid solder flows from the soldering surface 33 to the penetrating surface 32, the connecting surface 21 blocks the liquid solder from flowing on the penetrating surface 32, so that the solder on the penetrating surface 32 is less, which results in unstable connection between the pins and the circuit board 30, and the pins 22 are easily separated from the circuit board 30 when the coil assembly is subjected to an external force.

Use the technical scheme of the utility model, connecting seat 20 has contact pin 22 and contact pin 22 protrusion and sets up in connecting face 21, has welding hole 31 on the circuit board 30, and contact pin 22 wears to establish in welding hole 31, and the infiltration face 32 of circuit board 30 is close to connecting seat 20 setting, and the infiltration face 32 and the distance of being connected between the face 21 are A, and A is greater than or equal to 0.5 mm. If the distance between the penetrating surface 32 and the connecting surface 21 is a smaller than 0.5mm, when the liquid solder flows from the soldering surface 33 to the penetrating surface 32, the connecting surface 21 blocks the liquid solder from flowing on the penetrating surface 32, resulting in less solder on the penetrating surface 32, and thus leading to unstable connection between the contact pin and the circuit board 30, and further reducing the structural stability of the coil assembly, resulting in higher failure rate of the coil assembly. And set up the distance between infiltration face 32 and the connection face 21 to be more than or equal to 0.5mm, can make the better surface of welding 33 of liquid solder flow to infiltration face 32 to make the solder can connect contact pin 22 and circuit board 30 more firmly, and then can improve the holistic structural stability of coil pack and coil pack's life.

In this embodiment, the first accommodating cavity is filled with an insulating colloid 40. Fill insulating glue 40 in the first intracavity that holds, can further fix contact pin 22 and circuit board 30 to, can protect the two through insulating glue 40, avoid steam, impurity to get into the first intracavity that holds.

Specifically, the distance A between the penetration surface 32 and the connection surface 21 is less than or equal to 2 mm. If A > 2mm, then need to make the first space that holds the intracavity portion great, make insulating colloid 40 internal existence gas pocket when insulating colloid 40 fills to first holding the intracavity easily like this to lead to insulating colloid 40's insulating effect to be relatively poor, influence coil assembly's performance, consequently, set up above-mentioned parameter into being less than or equal to 2mm, can improve insulating colloid 40's insulating effect. In addition, if the number of air holes in the insulating resin 40 is too large, the coil assembly becomes a waste product, and therefore, the rejection rate of the coil assembly can be effectively reduced by the above arrangement.

Specifically, the body 10 includes a plastic package housing 11 and a cover 12, the cover 12 is hermetically connected to a side wall of the plastic package housing 11, the connection seat 20 is disposed on the side wall of the plastic package housing 11, and a space is formed between the cover 12 and the plastic package housing 11 to form a first accommodating cavity. After the connecting socket 20 and the circuit board 30 are mounted, the cover 12 is connected to the sidewall of the plastic package housing 11. The connecting seat 20 is arranged on the side wall of the plastic package shell 11, so that the installation is convenient, the stability of the connecting seat 20 is improved, and the connecting seat 20 can be protected.

In this embodiment, the plastic package housing 11 is further provided with a second accommodating cavity, and the first accommodating cavity and the second accommodating cavity are arranged at an interval; the coil assembly further includes a winding disposed within the second receiving cavity, the winding being electrically connected to the other end of the pin 22. The winding is electrically connected with the contact pin 22, the contact pin 22 is electrically connected with the circuit board 30, the circuit board 30 is also connected with a lead, the lead is electrically connected with the contact pin through a circuit on the circuit board 30, and the winding is connected with an external electronic part through the lead. With first chamber and the second chamber interval setting that holds, can avoid winding and circuit board 30 mutual interference.

Specifically, the distance between the welding surface 33 and the inner wall of the cover 12 is B, and B is more than or equal to 5mm and more than or equal to 0.8 mm. If B is larger than 5mm, the space of the first accommodating cavity is larger, so that air holes are easy to exist when the insulating colloid 40 is filled into the first accommodating cavity, and the insulating property of the insulating colloid 40 is reduced; if B is less than 0.8mm, the thickness of the insulating colloid 40 is smaller, so that the pin 22 and the circuit board 30 cannot be well insulated by the insulating colloid 40; therefore, setting B to be more than or equal to 5mm and more than or equal to 0.8mm can make the thickness of the insulating colloid 40 larger and the air holes in the insulating colloid less, so that the insulating colloid 40 has better insulating performance for the pins 22 and the circuit board 30.

The embodiment of the utility model provides a second provides a coil component, with the difference of embodiment one, is provided with spacing portion on the connecting seat 20, and the terminal surface protrusion of keeping away from body 10 of spacing portion is connected the setting of face 21, spacing portion and circuit board 30 butt to limit infiltration face 32 and the distance of being connected between the face 21. The limiting part is arranged to prevent the circuit board 30 from approaching the connecting seat 20, so that A is kept to be larger than or equal to 0.5 mm. And set up spacing portion, conveniently install circuit board 30, only need during the installation with circuit board 30 and spacing portion butt can. In other embodiments, the limiting part can also be arranged on the inner wall of the first accommodating cavity.

As shown in fig. 3, the limiting portion includes at least one limiting block 50, the limiting block 50 is disposed on the periphery of the connecting surface 21, and the limiting block 50 abuts against the circuit board 30. The limiting block 50 is arranged on the connecting surface 21, and is simple in structure and small in occupied space. In other embodiments, the stop block 50 may also be a stop rod or stop block disposed on a side of the connecting base 20.

The embodiment also provides an electronic expansion valve which comprises the coil assembly. The electronic expansion valve comprising the coil assembly has the advantages of good structural stability, long service life of parts, small overall size and the like.

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.

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 … … surface," "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 (9)

1. A coil assembly, comprising:

a body (10) having a first housing cavity;

the connecting seat (20) is provided with a connecting surface (21), the connecting seat (20) is arranged in the first accommodating cavity, a contact pin (22) is arranged on the connecting seat (20), and one end of the contact pin (22) protrudes out of the connecting surface (21);

the circuit board (30) is arranged in the first accommodating cavity, a welding hole (31) is formed in the circuit board (30), the contact pin (22) penetrates through the welding hole (31), the circuit board (30) is provided with a penetration surface (32) and a welding surface (33) which are arranged oppositely, the penetration surface (32) is close to the connecting seat (20) and is arranged, the distance between the penetration surface (32) and the connecting surface (21) is A, and A is larger than or equal to 0.5 mm.

2. Coil assembly according to claim 1, wherein the first housing cavity is filled with an insulating gel (40).

3. Coil assembly according to claim 1, wherein the distance A between the penetration surface (32) and the connection surface (21) is ≦ 2 mm.

4. The coil assembly according to claim 1, wherein a limiting portion is disposed on the connecting seat (20), an end surface of the limiting portion, which is far away from the body (10), protrudes from the connecting surface (21), and the limiting portion abuts against the circuit board (30) to limit a distance between the penetration surface (32) and the connecting surface (21).

5. The coil assembly according to claim 4, wherein the limiting portion comprises at least one limiting block, the limiting block is disposed at an outer periphery of the connecting surface (21), and the limiting block abuts against the circuit board (30).

6. The coil assembly according to claim 1, wherein the body (10) comprises a plastic package housing (11) and a cover body (12), the cover body (12) is hermetically connected with a side wall of the plastic package housing (11), the connecting base (20) is arranged on the side wall of the plastic package housing (11), a gap is formed between the cover body (12) and the plastic package housing (11), and the gap forms the first accommodating cavity.

7. The coil assembly of claim 6,

the plastic package shell (11) is also provided with a second accommodating cavity, and the first accommodating cavity and the second accommodating cavity are arranged at intervals;

the coil component further comprises a winding, the winding is arranged in the second accommodating cavity, and the winding is electrically connected with the other end of the contact pin (22).

8. Coil assembly according to claim 6, characterized in that the distance between the soldering surface (33) and the inner wall of the cover (12) is B, 5mm ≧ B ≧ 0.8 mm.

9. An electronic expansion valve comprising a coil assembly according to any of claims 1 to 8.

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