circuit breaker

Abstract

The utility model relates to circuit breaker technical field especially relates to a circuit breaker. Circuit breaker includes the casing, electronic switch module, heat abstractor and structure switch module, and the inner chamber of casing is provided with electronic switch module, heat abstractor and structure switch module along the length direction side by side, and the inner chamber of casing is provided with electronic switch module, heat abstractor and structure switch module along the length direction side by side, and the inner chamber of casing is provided with electronic switch module, heat abstractor and structure switch module along the length direction side by side, and the inner chamber of casing is provided with electronic switch module, heat abstractor and structure switch module along the length direction side by side, and the inner chamber of casing is provided with electronic switch module, heat abstractor and structure switch module along the length direction side by side, and the inner chamber of casing is provided with electronic switch module, heat abstractor and structure switch module along the length direction side by side, and the inner chamber of casing is provided with electronic switch module, heat abstractor and structure switch module along the length direction side by side, and the inner chamber of casing is provide with electronic switch module, heat abstractor and structure switch module along the length direction side by side.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, and in particular to a circuit breaker. Background Technology

[0002] Solid-state circuit breakers are power switching devices based on semiconductor power devices, used to replace traditional mechanical circuit breakers. They are favored for their high breaking capacity and arc-free breaking characteristics.

[0003] Existing solid-state circuit breakers contain an electronic switch module, a heat dissipation module, and a structural switch module within their housing. To facilitate electrical connection between the electronic switch module and the structural switch module, the electronic switch module is typically installed between them. During normal operation, the continuously energized electronic switch module generates a significant amount of heat. However, due to the limited placement of the electronic switch module within the housing, this heat cannot be dissipated quickly, resulting in low heat dissipation efficiency and excessively high housing temperature, which fails to meet operational requirements. Utility Model Content

[0004] The purpose of this invention is to provide a circuit breaker that improves the heat dissipation efficiency of the electronic switch module and reduces the temperature rise of the circuit breaker.

[0005] To achieve this objective, the technical solution adopted by this utility model is as follows:

[0006] A circuit breaker includes a housing, an electronic switch module, a heat sink, and a structural switch module. The electronic switch module, the heat sink, and the structural switch module are arranged side by side along the length of the inner cavity of the housing. One side of the electronic switch module along the length is close to the inner wall of the housing, and the heat sink is attached to the other side of the electronic switch module along the length. The housing is provided with heat dissipation holes communicating with the inner cavity.

[0007] As an optional solution, an adhesive layer is sandwiched between the electronic switch module and the heat sink, and the heat sink is bonded to the other side of the electronic switch module along the length direction through the adhesive layer.

[0008] As an optional solution, the housing is provided with a partition, which divides the inner cavity of the housing into a first cavity and a second cavity. The electronic switch module and the heat sink are both installed in the first cavity, and the structural switch module is installed in the second cavity.

[0009] A stop plate is provided on the side of the partition facing the first cavity, and the heat dissipation component is limited and snapped between the stop plate and the inner bottom wall of the first cavity; the structural switch module is installed on the side of the partition facing the second cavity.

[0010] As an optional solution, the housing includes:

[0011] An intermediate shell, wherein the partition is disposed inside the intermediate shell, and both sides of the intermediate shell are open along the length direction;

[0012] The first cover is disposed on the open end of the intermediate shell along its length and forms the first cavity with the intermediate shell; the electronic switch module is located near the inner wall of the first cover along its length.

[0013] The second shell cover is disposed on the open end of the intermediate shell along the length direction and forms the second cavity with the intermediate shell.

[0014] As an alternative, the first shell cover and the second shell cover are respectively connected to the intermediate shell by fasteners; and / or, the first shell cover and the second shell cover are respectively snap-fitted to the intermediate shell.

[0015] As an optional solution, the heat dissipation holes are provided on both opposite sides of the housing along the width direction.

[0016] As an optional solution, the bottom end of the housing along the height direction is provided with a connected slot and a groove, the slot being used to engage with the mounting component; a braking component is movably disposed in the groove, the braking component extending into the slot and pressing against the mounting component to lock the housing and the mounting component; or, the braking component disengages from the mounting component to unlock the housing and the mounting component.

[0017] As an optional solution, a heat dissipation channel is provided through the inner bottom wall of the card slot, and one end of the heat dissipation channel is connected to the inner cavity of the housing and located below the heat dissipation component.

[0018] As an optional solution, the heat dissipation channel has a first vent and a second vent, the first vent communicating with the inner cavity of the housing, and the second vent penetrating the inner bottom wall of the slot;

[0019] Along the height direction, the projection of the first air hole onto the inner bottom wall of the slot does not coincide with the second air hole.

[0020] As an optional solution, the heat sink includes:

[0021] The main body plate is attached to the other side of the electronic switch module along its length.

[0022] Fins, a plurality of fins are spaced apart along the height direction on the side of the main body plate away from the electronic switch module, each fin is provided with a heat dissipation vent, and the heat dissipation vents of the plurality of fins are sequentially aligned and connected along the height direction to form a vertical flow channel connected to the first air hole.

[0023] The beneficial effects of this utility model are as follows:

[0024] The circuit breaker proposed in this utility model has an electronic switch module, a heat sink, and a structural switch module arranged side by side along the length of the inner cavity of the housing. The electronic switch module, which serves as a heat-generating element, is installed between the inner wall of the housing and the heat sink, which facilitates the rapid release of heat from the electronic switch module and heat dissipation through the heat sink and the housing. Furthermore, the heat sink quickly transfers heat to the outside of the housing through heat dissipation holes, thereby improving the heat dissipation efficiency of the heat sink, effectively suppressing the temperature rise of the circuit breaker, and improving the safety of the circuit breaker. Attached Figure Description

[0025] Figure 1 This is a first structural schematic diagram of the circuit breaker provided in this embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the second structure of the circuit breaker provided in this embodiment of the utility model;

[0027] Figure 3 This is an exploded view of the first structure of the circuit breaker provided in this embodiment of the utility model;

[0028] Figure 4 This is an exploded view of the second structure of the circuit breaker provided in this embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the internal structure of the shell provided in an embodiment of the present utility model;

[0030] Figure 6 This is a partial structural schematic diagram of the intermediate shell provided in an embodiment of the present utility model;

[0031] Figure 7 This is a schematic diagram of the heat dissipation component provided in an embodiment of the present invention.

[0032] The component names and labels in the diagram are as follows:

[0033] 10. Ventilation hole; 20. Card slot; 30. Slot; 40. Ventilation channel; 401. First vent; 402. Second vent;

[0034] 1. Housing; 11. Intermediate housing; 111. Partition plate; 112. Stop plate; 113. Snap-on arm; 12. First housing cover; 120. First snap-on; 13. Second housing cover; 130. Second snap-on; 2. Electronic switch module; 3. Heat sink; 31. Main plate; 32. Fin; 321. Heat sink vent; 4. Structural switch module; 5. Adhesive layer. Detailed Implementation

[0035] To make the technical problem solved by this utility model, the technical solution adopted, and the technical effect achieved clearer, the technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] Existing solid-state circuit breakers contain an electronic switch module, a heat dissipation module, and a structural switch module within their housing. To facilitate electrical connection between the electronic switch module and the structural switch module, the electronic switch module is typically installed between them. During normal operation, the continuously energized electronic switch module generates a significant amount of heat. However, due to the limited placement of the electronic switch module within the housing, this heat cannot be dissipated quickly, resulting in low heat dissipation efficiency and excessively high housing temperature, which fails to meet operational requirements.

[0041] To solve the above problems, such as Figures 1-4 As shown in the figure, this embodiment proposes a circuit breaker, which includes a housing 1, an electronic switch module 2, a heat sink 3, and a structural switch module 4. The electronic switch module 2, the heat sink 3, and the structural switch module 4 are arranged side-by-side along the length of the inner cavity of the housing 1. One side of the electronic switch module 2 along the length (left-right direction in the figure) is close to the inner wall of the housing 1, and the heat sink 3 is fitted to the other side of the electronic switch module 2 along the length. The housing 1 is provided with heat dissipation holes 10 communicating with the inner cavity. Because the electronic switch module 2, the heat sink 3, and the structural switch module 4 are arranged side-by-side along the length of the inner cavity of the housing 1, the electronic switch module 2, which acts as a heat-generating element, is installed between the inner wall of the housing 1 and the heat sink 3. This facilitates the rapid release of heat from the electronic switch module 2, which is then dissipated through the heat sink 3 and the housing 1. Furthermore, the heat sink 3 rapidly transfers heat to the outside of the housing 1 through the heat dissipation holes 10, improving the heat dissipation efficiency of the heat sink 3, effectively suppressing the temperature rise of the circuit breaker, and enhancing the safety of the circuit breaker.

[0042] It should be noted that the circuit breaker in this embodiment is a solid-state circuit breaker, which is mainly used in electronic switch rail-mounted equipment. For example... Figure 2As shown, the bottom end of the housing 1 along the height direction (vertical direction in the figure) has a connected slot 20 and a recess 30. The slot 20 is used to engage with the mounting component. A braking component is movably disposed within the recess 30. The braking component extends into the slot 20 and abuts against the mounting component to lock the housing 1 and the mounting component; alternatively, the braking component disengages from the mounting component to unlock the housing 1 and the mounting component. The aforementioned mounting component is a rail, and the circuit breaker is engaged and installed in the rail via the slot 20, with the braking component movably passing through the recess 30. Once the circuit breaker is installed on the rail, simply insert the brake into slot 30, then extend one end of the brake into slot 20 and press it against the rail to secure the circuit breaker. When it is necessary to adjust the circuit breaker's installation position along the rail, simply disengage the brake from the rail, allowing the circuit breaker to move along the rail until the desired position is reached. Then, re-lock the circuit breaker to the rail using the brake. This achieves stable installation of the circuit breaker and facilitates flexible adjustment of its installation position, improving the efficiency of adjustment. Since the brake is a commonly used component for circuit breaker installation on rails, its specific structure will not be described in detail. Of course, the aforementioned mounting components can also be used for other equipment or devices that require circuit breaker installation.

[0043] The circuit breaker in this embodiment is an LN circuit breaker. Electronic switch module 2 is connected to the live wire, and structural switch module 4 is connected to the neutral wire. The housing 1 has four wiring ports. When not energized, turning the handle exposed on the housing 1 from front to back to the closed position closes the structural switch module 4, while electronic switch module 2 remains open. When the main circuit containing the circuit breaker is energized, electronic switch module 2 receives an electrical signal from the main circuit and becomes conductive, at which point the circuit breaker is in normal operating condition. When the current in the main circuit is abnormal (leakage or short circuit), electronic switch module 2 first disconnects, then drives the electromagnetic trip unit inside the circuit breaker to disconnect structural switch module 4, achieving arc-free disconnection. Since the working principle of the circuit breaker is existing technology, it will not be described in detail here. Of course, the circuit breaker can also be other types of circuit breakers, which are not specifically limited here.

[0044] like Figure 3 and Figure 4 As shown, an adhesive layer 5 is sandwiched between the electronic switch module 2 and the heat sink 3, and the heat sink 3 is bonded to the other side of the electronic switch module 2 along its length via the adhesive layer 5. The adhesive bonding of the heat sink 3 to the other side of the electronic switch module 2 simplifies the assembly structure of the heat sink 3, eliminating the need for additional processing such as drilling on the electronic switch module 2, simplifying the bonding operation, and improving the assembly efficiency of the heat sink 3. Furthermore, the adhesive layer 5 prevents interference between the heat sink 3 and components on the surface of the electronic switch module 2, increasing the contact area between the heat sink 3 and the electronic switch module 2, which is beneficial for rapid heat dissipation.

[0045] like Figure 3 and Figure 5 As shown, a partition 111 is provided inside the housing 1, dividing the inner cavity of the housing 1 into a first cavity and a second cavity. The electronic switch module 2 and the heat sink 3 are both installed in the first cavity, while the structural switch module 4 is installed in the second cavity. A stop plate 112 is provided on the side of the partition 111 facing the first cavity, and the heat sink 3 is limited and engaged between the stop plate 112 and the inner bottom wall of the first cavity. The structural switch module 4 is installed on the side of the partition 111 facing the second cavity. By dividing the inner cavity of the housing 1 into the first and second cavities through the partition 111, the electronic switch module 2 and the structural switch module 4 can be installed separately, thereby minimizing the impact of heat dissipation from the electronic switch module 2 on the normal operation of the structural switch module 4. Furthermore, the stop plate 112 on the partition 111 enables the heat sink 3 to be positioned and installed in the first cavity, improving the stability of the heat sink 3 installation and preventing the heat sink 3 from detaching from the electronic switch module 2.

[0046] Specifically, such as Figure 5 As shown, two stop plates 112 are spaced apart along the width direction (front and back direction in the figure). The two stop plates 112 together limit and abut against the top of the heat sink 3, so that the top of the heat sink 3 is subjected to uniform force, preventing the top of the heat sink 3 from deflecting, and further improving the positioning accuracy of the heat sink 3. Of course, the specific number and arrangement of the stop plates 112 can also be flexibly adjusted according to the requirements.

[0047] like Figure 3 and Figure 4 As shown, the housing 1 includes an intermediate shell 11, a first cover 12, and a second cover 13. A partition 111 is disposed inside the intermediate shell 11, and both sides of the intermediate shell 11 are open along its length. The first cover 12 covers one open end of the intermediate shell 11 along its length and forms a first cavity with the intermediate shell 11. The electronic switch module 2 is located near the inner wall of the first cover 12 along its length. The second cover 13 covers the other open end of the intermediate shell 11 along its length and forms a second cavity with the intermediate shell 11. By setting the housing 1 as a three-part structure, the processing difficulty and cost of the housing 1 are reduced, and the rapid assembly and disassembly of the electronic switch module 2, heat sink 3, and structural switch module 4 inside the housing 1 are facilitated, improving the efficiency of circuit breaker assembly and disassembly.

[0048] In this embodiment, the first shell cover 12 and the second shell cover 13 are respectively connected to the intermediate shell 11 by fasteners, and the first shell cover 12 and the second shell cover 13 are also snap-fitted to the intermediate shell 11. Specifically, the front end, rear end, left end, right end, and top end of the intermediate shell 11 are respectively fixedly connected to the corresponding first shell cover 12 and second shell cover 13 by rivets, so as to improve the connection strength of the three separate shells of the intermediate shell 11, the first shell cover 12, and the second shell cover 13, and improve the structural stability of the shell 1. The middle position of the bottom end of the intermediate shell 11 is snap-fitted to the first shell cover 12 and the second shell cover 13, avoiding the use of rivets and other fasteners, and preventing the rivets from interfering with the internal electronic switch module 2. The inner bottom wall of the slot 20 is provided with latching arms 113 extending outwards to the left and right sides in the length direction. The bottom end of the first shell cover 12 is provided with a first latch 120, and the bottom end of the second shell cover 13 is provided with a second latch 130. The two latching arms 113 are respectively engaged with the first latch 120 and the second latch 130 to realize the latching assembly of the three split shells at the bottom end of the shell 1.

[0049] In other alternative embodiments, the first shell cover 12 and the second shell cover 13 are connected to the intermediate shell 11 only by fasteners, that is, the front end, rear end, left end, right end, top end, and bottom end of the intermediate shell 11 are fixedly connected to the corresponding first shell cover 12 and second shell cover 13 by rivets. Alternatively, the first shell cover 12 and the second shell cover 13 are connected to the intermediate shell 11 only by snap-fit, that is, the front end, rear end, left end, right end, top end, and bottom end of the intermediate shell 11 are connected to the corresponding first shell cover 12 and second shell cover 13 by snap-fit. It is understood that the specific assembly method of the three separate shells only needs to achieve stable assembly of the shell 1 and not interfere with the electronic switch module 2, and is not specifically limited here.

[0050] It should be noted that heat dissipation holes 10 are provided on both opposite sides of the housing 1 along its width. By providing heat dissipation holes 10 on both the front and rear sides of the housing 1 along its width, not only is the opening area of ​​the heat dissipation holes 10 increased, but the housing 1 can also achieve air convection along its width. This facilitates the rapid passage of external air through the inner cavity of the housing 1, increasing the air velocity within the housing 1. This allows the external air to quickly carry the heat from the electronic switch module 2 and the heat sink 3 to the outside of the housing 1, thereby improving the heat dissipation efficiency of the heat sink 3 and greatly reducing the temperature rise of the circuit breaker. The number, shape, and opening area of ​​the heat dissipation holes 10 can be adaptively adjusted according to the heat dissipation requirements of the circuit breaker, and are not specifically limited here.

[0051] When the housing 1 is installed on the track via the slot 20, there is a certain gap between the inner bottom wall of the slot 20 and the track. A heat dissipation channel 40 is provided through the inner bottom wall of the slot 20, with one end of the channel 40 communicating with the inner cavity of the housing 1 and located below the heat sink 3. By providing the heat dissipation channel 40, the heat from the heat sink 3 is transferred to the outside of the housing 1 or to the track for heat dissipation, further improving the heat dissipation performance of the circuit breaker and enhancing the suppression of temperature rise. Since the heat dissipation channel 40 is located below the heat sink 3, the distance between the heat sink 3 and the heat dissipation channel 40 is shortened, further improving heat dissipation efficiency.

[0052] like Figure 5 and Figure 6 As shown, the heat dissipation channel 40 has a first vent 401 and a second vent 402. The first vent 401 communicates with the inner cavity of the housing 1, and the second vent 402 penetrates the inner bottom wall of the slot 20. Along the height direction, the projection of the first vent 401 onto the inner bottom wall of the slot 20 does not coincide with the second vent 402. Through the above arrangement, the heat dissipation channel 40 is a non-straight channel, which changes the airflow direction within the heat dissipation channel 40, thereby achieving a good dust prevention effect, reducing the possibility of external dust and impurities entering the housing 1 and causing short circuits, and improving the safety of the circuit breaker.

[0053] like Figure 7 As shown, the heat sink 3 includes a main plate 31 and fins 32. The main plate 31 is attached to the other side of the electronic switch module 2 along its length. Multiple fins 32 are spaced apart along the height direction on the side of the main plate 31 away from the electronic switch module 2. Each fin 32 has a heat dissipation port 321 extending through it. The heat dissipation ports 321 of the multiple fins 32 are sequentially aligned and connected along the height direction, forming a vertical flow channel connected to the first vent 401. By adding multiple fins 32 to the main plate 31, the heat dissipation area of ​​the heat sink 3 is greatly increased, thereby improving the heat dissipation efficiency. Simultaneously, the multiple fins 32 form vertical flow channels through their respective heat dissipation ports 321, facilitating the flow of heat from the heat sink 3 into the heat dissipation channel 40 along these vertical channels, thus improving the heat dissipation efficiency of the heat dissipation channel 40. This allows the housing 1 to dissipate heat in multiple directions through the heat dissipation holes 10 and the heat dissipation channel 40, further improving the heat dissipation efficiency.

[0054] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A circuit breaker, characterized in that, The device includes a housing (1), an electronic switch module (2), a heat sink (3), and a structural switch module (4). The electronic switch module (2), the heat sink (3), and the structural switch module (4) are arranged side by side along the length of the inner cavity of the housing (1). One side of the electronic switch module (2) along the length is close to the inner wall of the housing (1), and the heat sink (3) is attached to the other side of the electronic switch module (2) along the length. The housing (1) is provided with heat dissipation holes (10) that communicate with the inner cavity.

2. The circuit breaker according to claim 1, characterized in that, An adhesive layer (5) is sandwiched between the electronic switch module (2) and the heat sink (3), and the heat sink (3) is bonded to the other side of the electronic switch module (2) along the length direction through the adhesive layer (5).

3. The circuit breaker according to claim 1, characterized in that, The housing (1) is provided with a partition (111), which divides the inner cavity of the housing (1) into a first cavity and a second cavity. The electronic switch module (2) and the heat sink (3) are both installed in the first cavity, and the structural switch module (4) is installed in the second cavity. A stop plate (112) is provided on the side of the partition (111) facing the first cavity, and the heat sink (3) is limited and snapped between the stop plate (112) and the inner bottom wall of the first cavity; the structural switch module (4) is installed on the side of the partition (111) facing the second cavity.

4. The circuit breaker according to claim 3, characterized in that, The housing (1) includes: An intermediate shell (11) is provided inside the intermediate shell (11), and the intermediate shell (11) is open on both sides along the length direction; The first cover (12) is placed on the open end of the intermediate shell (11) along the length direction and forms the first cavity with the intermediate shell (11); the electronic switch module (2) is close to the inner wall of the first cover (12) along the length direction. The second cover (13) is placed on the open end of the intermediate shell (11) along the length direction and forms the second cavity with the intermediate shell (11).

5. The circuit breaker according to claim 4, characterized in that, The first shell cover (12) and the second shell cover (13) are respectively connected to the intermediate shell (11) by fasteners; and / or, the first shell cover (12) and the second shell cover (13) are respectively snap-fitted to the intermediate shell (11).

6. The circuit breaker according to any one of claims 1-5, characterized in that, The housing (1) has heat dissipation holes (10) on both sides opposite to each other along the width direction.

7. The circuit breaker according to any one of claims 1-5, characterized in that, The housing (1) has a connected slot (20) and a slot (30) at its bottom end along the height direction. The slot (20) is used to engage with the mounting component. A braking component is movably disposed in the slot (30). The braking component extends into the slot (20) and abuts against the mounting component to lock the housing (1) and the mounting component. Alternatively, the braking component disengages from the mounting component to unlock the housing (1) and the mounting component.

8. The circuit breaker according to claim 7, characterized in that, The inner bottom wall of the slot (20) is provided with a heat dissipation channel (40), one end of which is connected to the inner cavity of the housing (1) and located below the heat dissipation component (3).

9. The circuit breaker according to claim 8, characterized in that, The heat dissipation channel (40) has a first vent (401) and a second vent (402). The first vent (401) communicates with the inner cavity of the housing (1), and the second vent (402) penetrates the inner bottom wall of the slot (20). Along the height direction, the projection of the first air hole (401) onto the inner bottom wall of the slot (20) does not coincide with the second air hole (402).

10. The circuit breaker according to claim 9, characterized in that, The heat sink (3) includes: The main body plate (31) is attached to the other side of the electronic switch module (2) along the length direction; Fins (32), a plurality of fins (32) are spaced apart along the height direction on the side of the main body plate (31) away from the electronic switch module (2), each fin (32) is provided with a heat dissipation port (321), and the heat dissipation ports (321) of the plurality of fins (32) are sequentially aligned and connected along the height direction to form a vertical flow channel connected to the first air hole (401).

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