CN217788296U - Conductive piece and circuit breaker - Google Patents
Conductive piece and circuit breaker Download PDFInfo
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- CN217788296U CN217788296U CN202221652841.7U CN202221652841U CN217788296U CN 217788296 U CN217788296 U CN 217788296U CN 202221652841 U CN202221652841 U CN 202221652841U CN 217788296 U CN217788296 U CN 217788296U
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- circuit breaker
- circuit board
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Abstract
The utility model provides a conductive piece and circuit breaker relates to the protection switch field that opens circuit. The conductive piece comprises a conductive piece body electrically connected with the circuit board of the circuit breaker, at least one heat conduction part is arranged on the conductive piece body, an insulation layer is arranged on the heat conduction part, and the heat conduction part is in contact with the component on the circuit board through the insulation layer so as to transfer heat on the component to the conductive piece body. The heat conduction part is directly arranged on the conductive piece body, and the heat conduction part is in contact with the components on the circuit board, so that heat generated by the components in the operation process of the circuit breaker is timely transmitted to the heat conduction part, then transmitted to the whole conductive piece body, and the conductive piece body is utilized for heat dissipation. On one hand, the heat exchange efficiency between the conductive member body and the surrounding gas is higher; on the other hand, after the conductive piece body participates in the heat dissipation process, the heat dissipation area is greatly increased. Therefore, the heat dissipation efficiency of the components is remarkably improved, and the serious failure is not easy to occur.
Description
Technical Field
The utility model relates to a circuit breaker field especially relates to an electrically conductive piece and circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. Because the conventional mechanical circuit breaker has poor breaking capacity and unsatisfactory arc extinguishing effect, the circuit breaker with the solid-state switch circuit is developed in the field, the arc-free breaking effect can be achieved, and the breaking capacity is greatly improved.
However, in the circuit breaker with the solid-state switching circuit, a circuit board on which the solid-state switching circuit is located is provided with a high-power component (such as a MOS transistor), and the high-power component generates a large amount of heat during the operation of the circuit breaker. Under the conditions of high-power load and high heat, the condition of serious failure of high-power components is easy to occur.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, an object of the present invention is to provide a conductive member.
The utility model provides a following technical scheme:
the utility model provides a conductive piece, is applied to the circuit breaker, conductive piece include with circuit board electric connection's the conductive piece body of circuit breaker, be equipped with at least one heat conduction portion on the conductive piece body, be equipped with the insulating layer in the heat conduction portion, the heat conduction portion pass through the insulating layer with the contact of components and parts on the circuit board, in order with heat transfer on the components and parts extremely conductive piece body.
As a further optional solution to the conductive member, the insulating layer is an insulating thermal conductive adhesive layer.
As a further alternative to the conductive member, the insulating layer is a ceramic layer.
As a further optional solution to the conductive member, the heat conducting portion is disposed parallel to the circuit board, and the heat conducting portion is integrally formed by bending.
As a further optional solution to the conductive member, at least two heat conduction parts are provided, and at least two heat conduction parts are uniformly arranged along the length direction of the conductive member body.
Another object of the present invention is to provide a circuit breaker.
The utility model provides a following technical scheme:
a circuit breaker comprises a circuit board and the conductive piece, wherein the circuit board is provided with a solid-state switching circuit, and the circuit board is electrically connected with the conductive piece body.
As a further optional scheme for the circuit breaker, the circuit breaker further comprises a housing, a mechanical contact and a line inlet terminal, wherein the circuit board, the conductive piece body, the mechanical contact and the line inlet terminal are all arranged in the housing.
As a further optional scheme for the circuit breaker, the conductive member body includes a first L-shaped pole plate and a second L-shaped pole plate, and the incoming terminal, the first L-shaped pole plate, the circuit board, the second L-shaped pole plate and the mechanical contact are sequentially connected in series;
the heat conducting part is arranged on the first L-shaped polar plate and/or the second L-shaped polar plate.
As a further optional scheme of the circuit breaker, an air hole is formed in the shell, and the air hole is adjacent to the conductive piece body.
As a further optional scheme for the circuit breaker, a partition plate is arranged on the shell, and the partition plate is located between the air holes and the conductive piece body.
The embodiment of the utility model has the following beneficial effect:
the conductive piece body electrically connected with the circuit board is made of metal or alloy materials, and has excellent heat conduction performance while being conductive. The heat conduction part is directly arranged on the conductive piece body, and the heat conduction part is in contact with the components on the circuit board through the insulating layer, so that heat generated by the components in the operation process of the circuit breaker is timely transmitted to the heat conduction part, then transmitted to the whole conductive piece body, and the conductive piece body is utilized for heat dissipation. On one hand, the heat exchange efficiency between the conductive member body and the surrounding gas is higher; on the other hand, after the conductive piece body participates in the heat dissipation process, the heat dissipation area is greatly increased. Therefore, the heat dissipation efficiency of the components is remarkably improved, and the serious failure is not easy to occur.
In order to make the aforementioned and other objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.
Fig. 1 is a schematic view illustrating an overall structure of a conductive device according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a fitting relationship between a conductive device body and a circuit board in a conductive device according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating an overall structure of a circuit breaker according to an embodiment of the present invention;
fig. 4 shows a schematic structural diagram of a housing in a circuit breaker according to an embodiment of the present invention;
fig. 5 shows an enlarged schematic view at a in fig. 4.
Description of the main element symbols:
100-a conductive member; 110-a conductive member body; 111-a thermally conductive portion; 112-a first L plate; 113-a second L plate; 200-a circuit board; 300-a housing; 310-a chucking block; 311-a guide ramp; 320-air holes; 330-a separator; 331-a partition; 400-an incoming terminal; 500-mechanical contact.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the templates herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1 and fig. 2, the present embodiment provides a conductive member 100 applied to a circuit breaker. The conductive device 100 includes a conductive device body 110, and the conductive device body 110 is electrically connected to a circuit board 200 of the circuit breaker.
Specifically, the conductive member body 110 is provided with at least one heat conduction portion 111, and the heat conduction portion 111 is provided with an insulation layer (not shown). In addition, the heat conduction part 111 contacts the components on the circuit board 200 through the insulating layer to transfer heat on the components to the conductive member body 110.
The conductive member body 110 electrically connected to the circuit board 200 is made of metal or alloy, and has excellent heat conductivity while being conductive. The conductive member 100 directly sets the heat conduction portion 111 on the conductive member body 110, and the heat conduction portion 111 contacts with the components on the circuit board 200, so that heat generated by the components in the operation process of the circuit breaker is timely transferred to the heat conduction portion 111, and then transferred to the whole conductive member body 110, and the heat is dissipated by the conductive member body 110.
On one hand, the heat exchange efficiency between the conductive member body 110 and the surrounding gas is higher; on the other hand, when the conductive device body 110 participates in the heat dissipation process, the heat dissipation area is greatly increased. Therefore, the heat dissipation efficiency of the components is remarkably improved, and the serious failure is not easy to occur.
Example 2
Referring to fig. 1 and fig. 2, the present embodiment provides a conductive member 100 applied to a circuit breaker. The conductive device 100 includes a conductive device body 110, and the conductive device body 110 is electrically connected to a circuit board 200 of the circuit breaker.
Specifically, the conductive member body 110 is a long strip-shaped plate-shaped structure, and the thickness direction of the conductive member body 110 is perpendicular to the thickness direction of the circuit board 200. The conductive member body 110 is provided with at least one heat conduction portion 111, and the heat conduction portion 111 is provided with an insulation layer (not shown).
In addition, the heat conduction part 111 contacts the components on the circuit board 200 through the insulating layer to transfer heat on the components to the conductive member body 110.
The conductive body 110 is made of metal or alloy, and has excellent heat conductivity while being conductive. The heat conduction part 111 is directly arranged on the conductive part body 110, and the heat conduction part 111 is in contact with the components on the circuit board 200, so that heat generated by the components in the operation process of the circuit breaker is timely transmitted to the heat conduction part 111, and then transmitted to the whole conductive part body 110, and the conductive part body 110 is utilized for heat dissipation.
The insulating layer can ensure the insulating property between the heat conducting part 111 and the component, and avoid the short circuit condition caused by the leakage of the shell of the component.
In this embodiment, the insulating layer is an insulating heat-conducting adhesive layer, specifically, a heat-conducting silicone material. The heat conducting silica gel has good heat conducting performance, and can quickly and effectively transfer heat on the component to the heat conducting part 111. In addition, the heat conductive silicone rubber can adhere and fix the heat conductive portion 111 and the component, so that the heat conductive portion 111 can stably maintain contact with the component.
In another embodiment of the present application, the insulating layer may also be a ceramic layer. The ceramic layer is a sheet-like ceramic, and is sandwiched between the heat conducting portion 111 and the component, so that the heat on the component can be quickly and efficiently transferred to the heat conducting portion 111 while the mutual insulation between the heat conducting portion 111 and the component is ensured.
Specifically, the heat conducting portion 111 is disposed parallel to the circuit board 200, and can be better attached to the component on the circuit board 200 through the insulating layer, so as to ensure a sufficiently large heat transfer area between the heat conducting portion 111 and the component.
In the present embodiment, the heat conducting portion 111 is integrally formed with the conductive member body 110 by bending. At this time, the material of the heat conducting portion 111 is the same as that of the conductive body 110, and the heat is not affected by other factors when being transferred between the heat conducting portion 111 and the conductive body 110.
In another embodiment of the present application, the heat conducting portion 111 may also be fixed on the conductive member body 110 by welding or the like.
Because more powerful components and parts can produce more heats at the circuit breaker operation in-process, the condition that the high temperature and serious inefficacy appears more easily, so in this embodiment, heat conduction portion 111 contacts with powerful components and parts (like the MOS pipe) through the insulating layer, preferentially dispels the heat to powerful components and parts.
In another embodiment of the present application, the heat conduction portion 111 may be in contact with another component through an insulating layer to dissipate heat from the other component.
In this embodiment, a thermal conductor 111 is in contact with a high power component through an insulating layer. At this time, the size of the heat conducting portion 111 may be set not to exceed the size of the corresponding component, so that the heat generated by the component is accurately transferred to the conductive member body 110, and meanwhile, the material and the control cost can be saved.
On this basis, there are at least two heat conduction parts 111, and the at least two heat conduction parts 111 are uniformly arranged along the length direction of the conductive member body 110.
When the heat conduction parts 111 are uniformly distributed on the conductive member body 110, the heat transferred to the conductive member body 110 is relatively uniform, and is not easily concentrated in a local area of the conductive member body 110, thereby ensuring effective heat dissipation.
Specifically, the number of the heat conduction portions 111 is four, corresponding to four MOS transistors, respectively, and the heat conduction portions 111 are in contact with the corresponding MOS transistors through an insulating layer.
In another embodiment of the present application, one thermal conduction portion 111 may also be in contact with a plurality of high power devices through an insulating layer, for example, one thermal conduction portion 111 is in contact with two MOS transistors through an insulating layer at the same time, or one thermal conduction portion 111 is in contact with four MOS transistors through an insulating layer at the same time.
The conductive component 100 directly sets the heat conduction part 111 on the conductive component body 110, and the heat generated by the high-power component is transferred to the whole conductive component body 110 by the heat conduction part 111, so that the heat is dissipated by the conductive component body 110. On one hand, the heat exchange efficiency between the conductive member body 110 and the surrounding gas is higher; on the other hand, when the conductive device body 110 participates in the heat dissipation process, the heat dissipation area is greatly increased. Therefore, the heat dissipation efficiency of the high-power component is remarkably improved, and the serious failure condition is not easy to occur.
From another perspective, above-mentioned electrically conductive 100 compromises electrically conductive and heat dissipation, collects two kinds of functions in an organic whole, has obtained more abundant utilization, is favorable to promoting the wholeness ability of circuit breaker, or reduces relevant radiating element under the unchangeable circumstances of circuit breaker performance, makes the structure of circuit breaker simpler.
Example 3
Referring to fig. 3, the present embodiment provides a circuit breaker, which includes a circuit board 200, a housing 300, a line terminal 400, a mechanical contact 500, and the conductive device 100 (see fig. 3), wherein the circuit board 200, the conductive device body 110, the line terminal 400, and the mechanical contact 500 are all disposed in the housing 300.
The circuit board 200 is provided with a solid-state switching circuit, the conductive member body 110 includes a first L-shaped pole plate 112 and a second L-shaped pole plate 113, and the incoming terminal 400, the first L-shaped pole plate 112, the circuit board 200, the second L-shaped pole plate 113 and the mechanical contact 500 are sequentially connected in series.
The heat conduction unit 111 may be provided only on the first L-plate 112, only on the second L-plate 113, or both the first L-plate 112 and the second L-plate 113.
Referring to fig. 3 and 4, in particular, a plurality of holding blocks 310 are disposed on the bottom surface of the inner wall of the housing 300, and the holding blocks 310 are disposed oppositely. The first L-shaped electrode plate 112 and the second L-shaped electrode plate 113 constituting the conductive member body 110 are respectively clamped between the clamping blocks 310 disposed oppositely, and are in interference fit with the clamping blocks 310, so as to be fixed in the housing 300 by static friction.
Referring to fig. 5, further, the first L-shaped plate 112 and the second L-shaped plate 113 are respectively clamped between the clamping blocks 310 from top to bottom, and the top of the clamping block 310 is provided with a guiding inclined surface 311. By means of the guide slope 311, a worker can more conveniently align the first L-plate 112 and the second L-plate 113 with the gap between the chucking blocks 310 and smoothly chuck them into the gap when mounting them.
Referring to fig. 3 and 4 again, further, the sidewall of the casing 300 is provided with air holes 320, and the air holes 320 are adjacent to the conductive member body 110.
The air inside and outside the shell 300 flows through the air holes 320, and the air holes 320 are adjacent to the conductive device body 110, so the air directly flows through the surface of the conductive device body 110, the heat on the conductive device body 110 can be effectively taken away, and the heat dissipation effect of the conductive device body 110 is enhanced.
In the embodiment, the heat conducting portions 111 are all disposed on the first L-shaped plate 112 near one side of the air holes 320, and the heat conducting portions 111 do not contact with the second L-shaped plate 113, thereby avoiding short circuit.
Further, a partition 330 is disposed on the inner wall of the casing 300, and the partition 330 is located between the air hole 320 and the conductive member body 110.
When the air outside the casing 300 flows into the casing 300 through the air holes 320, the air first impacts the partition 330 and then flows over the surface of the conductive member 110 bypassing the partition 330. In this process, dust and water vapor mixed in the gas can be intercepted by the partition plate 330, so that the dust and the water vapor are prevented from being excessively accumulated on the conductive member body 110, and further, the heat dissipation blockage caused by the dust deposition of the conductive member body 110 is avoided, or the conductive member body 110 is prevented from being corroded.
In this embodiment, the number of the airing holes 320 is six, the number of the partition plates 330 is four, and the six airing holes 320 and the four partition plates 330 are all arranged along the length direction of the first L-plate 112.
Wherein, along the length direction of the first L-shaped plate 112, the two separators 330 at the two ends are respectively opposite to one air hole 320, and the two separators 330 in the middle are respectively opposite to the two air holes 320.
Referring to fig. 5, in addition, a partition 331 is disposed between the two middle partitions 330 and the sidewall of the housing 300. The partition 331 partitions the two air holes 320 facing the partition 330, preventing the two air holes 320 from being directly communicated with each other, and ensuring that air outside the casing 300 can flow through a sufficient distance after flowing into the casing 300 through the air holes 320, thereby sufficiently exchanging heat with the conductive member body 110.
In summary, in the circuit breaker, heat generated from a high-power component is transferred to the conductive member body 110 through the heat conduction portion 111, and further dissipated from the conductive member body 110 into surrounding gas. In the process that the gas inside and outside the shell 300 circulates mutually, the part of heat is transferred outside the shell 300, so that the high-power components can be continuously and effectively cooled, and the serious failure of the high-power components due to overhigh temperature is avoided.
In all examples shown and described herein, any particular value should be construed as exemplary only and not as a limitation, and thus other examples of example 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, it need not be further defined and explained in subsequent figures.
The above-described embodiments are merely illustrative of several embodiments of the present invention, which are described in detail and specific, but not intended to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (10)
1. The utility model provides a conductive piece, is applied to the circuit breaker, its characterized in that, conductive piece include with circuit board electric connection's the conductive piece body of circuit breaker, be equipped with at least one heat conduction portion on the conductive piece body, be equipped with the insulating layer on the heat conduction portion, the heat conduction portion pass through the insulating layer with the contact of components and parts on the circuit board, with heat transfer on the components and parts extremely conductive piece body.
2. The conductive member of claim 1, wherein the insulating layer is an insulating thermal conductive adhesive layer.
3. The conductive article of claim 1, wherein the insulating layer is a ceramic layer.
4. The conductive device of any one of claims 1-3, wherein the heat conducting part is disposed parallel to the circuit board, and the heat conducting part is integrally bent.
5. The conductive member as claimed in any one of claims 1 to 3, wherein the heat conductive parts are provided in at least two, at least two of which are uniformly arranged along a length direction of the conductive member body.
6. A circuit breaker comprising a circuit board provided with a solid state switching circuit and a conductive member as claimed in any one of claims 1 to 5, the circuit board being electrically connected to the conductive member body.
7. The circuit breaker of claim 6, further comprising a housing, a mechanical contact, and a line terminal, wherein the circuit board, the conductor body, the mechanical contact, and the line terminal are disposed within the housing.
8. The circuit breaker of claim 7, wherein the conductive body comprises a first L-plate and a second L-plate, and the incoming terminal, the first L-plate, the circuit board, the second L-plate and the mechanical contact are connected in series in sequence;
the heat conducting part is arranged on the first L-shaped polar plate and/or the second L-shaped polar plate.
9. The circuit breaker of claim 7, wherein the housing is provided with a vent hole, and the vent hole is adjacent to the conductive member body.
10. The circuit breaker of claim 9, wherein a partition is disposed on the housing, and the partition is located between the vent and the conductive member body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221652841.7U CN217788296U (en) | 2022-06-28 | 2022-06-28 | Conductive piece and circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221652841.7U CN217788296U (en) | 2022-06-28 | 2022-06-28 | Conductive piece and circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217788296U true CN217788296U (en) | 2022-11-11 |
Family
ID=83937717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221652841.7U Active CN217788296U (en) | 2022-06-28 | 2022-06-28 | Conductive piece and circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217788296U (en) |
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2022
- 2022-06-28 CN CN202221652841.7U patent/CN217788296U/en active Active
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