Circuit breaker
By installing insulating partition walls and high-thermal-conductivity graphene plastic parts between adjacent phase units of the circuit breaker, the problem of excessive temperature rise at the intermediate phase terminals is solved, and efficient heat dissipation of the circuit breaker is achieved in various environments, meeting temperature rise requirements and improving product reliability.
Patent Information
- Application Number
- CN202422584742.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-24
AI Technical Summary
The temperature rise of existing circuit breakers at the middle phase terminal exceeds 70k, causing the product to fail the temperature rise test under standard conditions and harsh environments, especially in high altitude, high frequency and closed environments where the heat dissipation efficiency is insufficient.
An insulating partition wall is set between adjacent phase units of the circuit breaker, and a high-thermal-conductivity graphene plastic part is embedded in the insulating partition wall as a heat sink to form a groove to enhance the heat dissipation effect. By coating the surface of the heat sink with a high-temperature resistant insulating coating, the heat dissipation area is increased for targeted heat dissipation.
It improves the heat dissipation efficiency of the circuit breaker, reduces the temperature rise of the phase unit, meets the temperature rise requirements of the product under standard conditions and harsh environments, and improves the reliability and performance of the product.
Smart Images
Figure CN223347713U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a circuit breaker. Background Art
[0002] During current circuit breaker use, the temperature of the middle phase terminal is much higher than that of the terminals on both sides. This is primarily due to the presence of heat sources on both sides of the middle phase terminal, resulting in a high heat exchange environment and poor heat dissipation, leading to the higher temperature of the middle phase. Low-voltage circuit breaker standard 14048.2 requires the terminal temperature rise to not exceed 70k. However, circuit breakers have a temperature rise of less than 70k on both sides of the terminal, while the temperature rise of the middle phase terminal is greater than 70k, causing the product to fail the temperature rise test. In more demanding scenarios, such as high altitudes, high frequencies, and confined environments, the requirements for product temperature rise performance will be even higher to ensure reliable product use. Clearly, current circuit breakers cannot meet these requirements under both standard conditions and harsh environments. Utility Model Content
[0003] The purpose of this application is to address the deficiencies in the above-mentioned prior art and provide a circuit breaker with high heat dissipation efficiency that can meet the temperature rise requirements of the product.
[0004] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:
[0005] According to one aspect of an embodiment of the present application, a circuit breaker is provided, comprising a housing, and a plurality of phase units arranged side by side in the housing, wherein the side-by-side direction of the plurality of phase units is perpendicular to the arrangement direction of the phase units, insulating partition walls arranged along the arrangement direction are provided between adjacent phase units, and a heat sink is provided in the insulating partition wall between at least two adjacent phase units.
[0006] Optionally, the insulating partition wall forms a groove, and the heat sink is arranged in the groove.
[0007] Optionally, the groove has an opening that passes through the insulating partition wall.
[0008] Optionally, the surface of the heat sink is coated with a high-temperature resistant insulating coating.
[0009] Optionally, the insulating partition wall and the heat sink are integrally provided.
[0010] Optionally, the heat sink is made of a high thermal conductivity graphene plastic.
[0011] Optionally, along the arrangement direction of the phase units, the heat sink extends from the phase units to the outer surface of the housing, and the extended portion forms a heat dissipation end.
[0012] Optionally, phase partitions are further provided, and the phase partitions are respectively located outside the heat dissipation ends along the arrangement direction of the phase units.
[0013] Optionally, the heat sink is integrally provided with the phase partition.
[0014] Optionally, among the plurality of phase units arranged side by side, the heat dissipation elements are respectively arranged between the two outermost phase units and the outer wall of the shell.
[0015] The beneficial effects of this application include:
[0016] The present application provides a circuit breaker in which each phase unit is arranged horizontally, and multiple phase units are arranged side by side vertically. At least adjacent phase units in the side-by-side direction are provided with an insulating partition wall arranged along the arrangement direction, and a heat sink is provided in the insulating partition wall between at least two adjacent phase units. In this way, the heat sink can effectively dissipate heat from the heat sources of adjacent phase units in a targeted manner, solving the problem of high phase unit temperatures, thereby improving the heat dissipation efficiency of the phase units, reducing the temperature rise of the phase units, and meeting the temperature rise requirements of the product under standard conditions and harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.
[0018] Figure 1 This is one of the structural schematic diagrams of a circuit breaker provided in an embodiment of the present application;
[0019] Figure 2 A second structural diagram of a circuit breaker provided in an embodiment of the present application;
[0020] Figure 3 This is a third structural schematic diagram of a circuit breaker provided in an embodiment of the present application.
[0021] Icon: 10-housing; 11-phase unit; 12-heat sink; 13-heat sink end; 14-phase partition; F-arrangement direction; D-side by side direction. DETAILED DESCRIPTION
[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application as claimed, but merely represents selected embodiments of the present application. It should be noted that, unless there is a conflict, the various features of the embodiments of the present application may be combined with each other, and the combined embodiments are still within the scope of protection of the present application.
[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.
[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0026] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.
[0027] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.
[0028] In one aspect of the embodiment of the present application, referring to Figure 1A circuit breaker is provided, comprising a housing 10, and a plurality of phase units 11 arranged side by side in the housing 10, wherein a side-by-side direction D (i.e., a vertical direction) of the plurality of phase units 11 is perpendicular to an arrangement direction F (i.e., a transverse direction) of the phase units 11, and insulating partition walls arranged along the arrangement direction F are provided between adjacent phase units 11, and a heat sink 12 is provided in the insulating partition wall between at least two adjacent phase units 11.
[0029] Furthermore, at least two adjacent phase units 11 both carry rated current, and a heat sink 12 is provided between the adjacent phase units 11 to dissipate heat for the adjacent phase units 11 .
[0030] In other embodiments, of two adjacent phase units 11, one phase unit 11 carries the rated current, and the other phase unit does not carry the rated current, that is, carries a current smaller than the rated current. A heat sink 12 may also be provided between the two phase units 11 for heat dissipation.
[0031] In the present application, each phase unit 11 is arranged in a transverse direction, and multiple phase units 11 are arranged side by side in a vertical direction. A heat sink 12 is provided between at least two adjacent phase units 11 in the side-by-side direction D. In this way, the heat sink 12 can effectively dissipate heat from the heat sources of the two adjacent phase units 11 in a targeted manner, solving the problem of excessive temperature of the phase units 11, thereby improving the heat dissipation efficiency of the phase units 11, reducing the temperature rise of the phase units 11, and meeting the temperature rise requirements of the product under standard conditions and harsh environments.
[0032] For example, a three-phase circuit breaker includes an upper phase unit 11, an intermediate phase unit 11, and a lower phase unit 11. The three phase units 11 are arranged horizontally and vertically side by side, and each phase unit 11 carries a rated current. The upper phase unit 11 and the intermediate phase unit 11 are adjacent in a side-by-side direction D and carry a rated current. A heat sink 12 is provided between the upper phase unit 11 and the intermediate phase unit 11. This allows the heat sink 12 to effectively dissipate heat from the heat sources of the upper and intermediate phase units 11, resolving the issue of high heat exchange ambient temperature, poor heat dissipation, and even higher temperatures in the intermediate phase unit 11 caused by heat sources on both sides of the intermediate phase unit 11. This improves the heat dissipation efficiency of the intermediate phase unit 11, reduces the temperature rise of the intermediate phase unit 11, and meets the product's temperature rise requirements under standard conditions and harsh environments. Preferably, a heat sink 12 is also provided between the lower phase unit 11 and the intermediate phase unit 11 for even greater effectiveness.
[0033] For example, in a four-phase circuit breaker, four phase units 11 are arranged horizontally and vertically side by side. From top to bottom, they are the upper phase unit 11, the middle phase unit 11, the lower phase unit 11, and the neutral phase unit 11. The upper phase unit 11, the middle phase unit 11, and the lower phase unit 11 carry the rated current, while the neutral phase unit 11 does not carry the rated current, that is, it carries a current less than the rated current. A heat sink 12 is provided between the upper phase unit 11 and the middle phase unit 11. In this way, the heat sink 12 can effectively dissipate heat from the heat sources of the upper and middle phase units 11, solving the problem of high heat exchange environment temperature and poor heat dissipation due to the presence of heat sources on the upper and lower sides of the middle phase unit 11, which can even cause the middle phase unit 11 to heat up even higher. This improves the heat dissipation efficiency of the middle phase unit 11, reduces the temperature rise of the middle phase unit 11, and meets the temperature rise requirements of the product under standard conditions and harsh environments. Preferably, a heat sink 12 is also provided between the lower phase unit 11 and the middle phase unit 11 , which has a better effect. Further, a heat sink 12 is also provided between the lower phase unit 11 and the neutral phase unit 11 .
[0034] An insulating partition wall arranged along the arrangement direction F (transverse direction) is provided between adjacent phase units 11 . The insulating partition wall is an insulating plastic member and forms a groove. The heat sink 12 is provided in the groove.
[0035] Multiple phase units 11 arranged in a parallel direction D are separated by insulating partition walls. Grooves are provided on the insulating partition walls to accommodate heat sinks 12 in the grooves to dissipate heat from the intermediate phase units 11. For example, the heat sink 12 is in the form of a heat sink plate.
[0036] The surface of the heat sink 12 is coated with a high-temperature resistant insulating coating, preferably resistant to high temperatures above 1000° C., which can effectively prevent the heat sink 12 material from insulation failure and breakdown under high temperature and / or high voltage.
[0037] In some embodiments, the insulating coating capable of withstanding high temperatures above 1000° C. may be an aluminum oxide coating.
[0038] The heat sink 12 is made of a high thermal conductivity graphene plastic to meet the requirements of high thermal conductivity.
[0039] Furthermore, the insulating partition wall forms a groove, and the heat sink 12 is disposed within the groove. The groove has an opening extending through the insulating partition wall, and the opening at least partially overlaps with a projection of the heat sink 12 in the parallel direction D. The heat sink 12 is exposed through the opening, allowing the heat sink 12 to directly contact the air in the cavity of the phase unit 11 and directly dissipate heat from the phase unit 11, thereby increasing the heat dissipation effect of the heat sink 12 on the phase unit 11.
[0040] Furthermore, the insulating partition wall and the heat sink 12 are integrally arranged, for example, the insulating partition wall is composed of the heat sink 12 , or for example, the insulating partition wall and the heat sink 12 are made of different materials but integrated into one, thereby increasing the heat dissipation effect of the heat sink 12 .
[0041] The length of the heat sink 12 in the transverse direction is substantially the same as that of the phase unit 11. Figure 2 As shown, along the arrangement direction F of the phase units 11 , the heat sink 12 extends from the phase units 11 to the outer surface of the housing 10 , and the extended portion forms a heat dissipation end 13 .
[0042] The heat sink 12 extends laterally beyond the length of the phase unit 11 and extends outward from the housing 10 until it is flush with the outer surface of the housing 10. The extended portion forms a heat sink end 13. This increases the heat dissipation area of the heat sink 12. In addition to dissipating heat specifically for the phase unit 11, it also dissipates heat from the surrounding area of the phase unit 11, thereby increasing the heat dissipation rate.
[0043] Preferably, the length of the heat dissipation end portion 13 in the vertical direction is greater than the length of the heat dissipation element 12 in the vertical direction, which can further increase the heat dissipation area of the heat dissipation element 12 to dissipate heat in the area surrounding the phase unit 11 .
[0044] Preferably, the length of the heat dissipation end portion 13 along the vertical direction is greater than the length of the heat dissipation element 12 along the vertical direction, and a slot is provided on the heat dissipation end portion 13 , which not only further increases the heat dissipation area but can also be used to connect the phase partition 14 .
[0045] Reference Figure 3 Phase partitions 14 are also provided. The phase partitions 14 are located outside the heat dissipation ends 13 along the arrangement direction F of the phase units 11 .
[0046] In order to improve the heat dissipation efficiency, the heat sink 12 and the phase partition 14 can be integrated. The heat sink 12 extends to the outside of the housing 10, further increasing the heat dissipation area of the heat sink 12.
[0047] As mentioned above, a heat sink 12 may be provided between at least two adjacent phase units 11 ; in other embodiments, heat sinks 12 are provided between the two outermost phase units 11 and the outer wall of the housing 10 of a plurality of parallel phase units 11 .
[0048] That is to say, in addition to setting heat sinks 12 between the side-by-side phase units 11, heat sinks 12 can also be set between the upper and lower outermost phase units 11 and the outer wall of the shell 10. In this way, on the basis of reducing the temperature rise of the middle phase unit 11, the terminal temperature of the entire product can be further reduced, thereby improving the overall performance and reliability of the product.
[0049] The following are some examples of arrangements of the heat sink 12 in the circuit breaker:
[0050] In the first embodiment, Figure 1 The heat dissipation structure consists of a groove in the middle of the insulating partition wall on both sides of the intermediate phase unit 11 in the circuit breaker housing 10. A highly thermally conductive graphene plastic component is placed in the groove as a heat sink 12. The surface of the heat sink 12 is coated with an insulating coating made of aluminum oxide, which can withstand temperatures exceeding 1000°C. This improves the heat dissipation effect of the intermediate phase unit 11 and reduces the temperature rise of the intermediate phase unit 11 in the product.
[0051] In the second embodiment, Figure 2 The heat dissipation structure consists of a groove in the middle of the insulating partition wall on either side of the intermediate phase unit 11 within the circuit breaker housing 10. A highly thermally conductive graphene plastic component is placed in the groove as a heat sink 12. This heat sink 12, which serves as part of the insulating partition wall, extends toward the exterior of the housing 10 until it is flush with the outer surface. This extension forms a heat sink end 13, transferring heat from the conductive circuit to the exterior of the housing 10, further reducing the temperature rise of the product terminals. The surface of the heat sink 12 is also coated with an insulating aluminum oxide coating that can withstand temperatures exceeding 1000°C.
[0052] In the third embodiment, Figure 3 The heat dissipation structure features a groove in the middle of the insulating partition wall on either side of the intermediate phase unit 11 within the circuit breaker housing 10. A highly thermally conductive graphene plastic component, serving as a heat sink 12, is placed within the groove. This heat sink 12, as part of the insulating partition wall, extends outside the housing 10 and further extends to integrate with the phase barrier 14, significantly increasing the heat dissipation area. The surface of the heat sink 12 is also coated with an insulating aluminum oxide coating that can withstand temperatures exceeding 1000°C.
[0053] In the fourth embodiment, Figure 1 、 Figure 2 、 Figure 3 On this basis, a groove is provided in the middle of the insulating partition wall on both sides of the intermediate phase unit 11 in the circuit breaker housing 10. A highly thermally conductive graphene plastic part is installed in the groove as a heat sink 12. Heat sinks 12 are also provided between the upper and lower phase units 11 of the outermost layer of the circuit breaker and the outer wall of the housing 10. In addition to reducing the temperature rise of the intermediate phase unit 11, the overall terminal temperature of the product is further reduced by installing heat sinks 12 between the outer wall of the circuit breaker and the outermost phase unit 11. At the same time, the surface of the heat sink 12 is coated with an insulating coating. The insulating coating is an aluminum oxide coating that can withstand high temperatures exceeding 1000°.
[0054] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.
Claims
1. A circuit breaker, characterized in that: The invention comprises a shell (10), and a plurality of phase units (11) arranged side by side in the shell (10), wherein the side-by-side direction (D) of the plurality of phase units (11) is perpendicular to the arrangement direction (F) of the phase units (11), an insulating partition wall arranged along the arrangement direction (F) is provided between adjacent phase units (11), and a heat sink (12) is provided in the insulating partition wall between at least two adjacent phase units (11).
2. The circuit breaker according to claim 1, wherein: The insulating partition wall forms a groove, and the heat sink (12) is arranged in the groove.
3. The circuit breaker according to claim 2, wherein: The groove has an opening that passes through the insulating partition wall, and the opening at least partially coincides with a projection of the heat sink (12) in the parallel direction (D).
4. The circuit breaker according to claim 1, wherein: The surface of the heat sink (12) is coated with a high-temperature resistant insulating coating.
5. The circuit breaker according to claim 1, wherein: The insulating partition wall and the heat sink (12) are integrally arranged.
6. The circuit breaker according to claim 1, wherein: The heat sink (12) is made of a high-thermal-conductivity graphene plastic.
7. The circuit breaker according to any one of claims 1 to 6, characterized in that: Along the arrangement direction (F) of the phase unit (11), the heat dissipation member (12) extends from the phase unit (11) to the outer surface of the housing (10), and the extended portion forms a heat dissipation end (13).
8. The circuit breaker according to claim 7, characterized in that Phase partitions (14) are also provided, and the phase partitions (14) are respectively located outside the heat dissipation ends (13) along the arrangement direction (F) of the phase units (11).
9. The circuit breaker according to claim 8, characterized in that The heat sink (12) and the phase partition (14) are integrally arranged.
10. The circuit breaker according to any one of claims 1 to 6, 8 to 9, characterized in that: Among the plurality of phase units (11) arranged side by side, the heat sink (12) is respectively arranged between the two outermost phase units (11) and the outer wall of the housing (10).