Electrical drawer with control loop
By employing a vertical partition design with the circuit breaker mechanism positioned at the bottom and the contactor mechanism positioned at the top, and a three-wall linkage heat dissipation hole structure, the problems of unreasonable component layout and low heat dissipation efficiency in low-voltage drawer-type switchgear are solved. This achieves efficient heat dissipation and improved electrical safety distance, extends component life, and enhances equipment stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- TELLHOW SHENZHEN ELECTRIC TECH
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-24
AI Technical Summary
In existing low-voltage drawer-type switchgear, the control circuit components are not arranged reasonably in a limited space, resulting in insufficient electrical safety distance and low heat dissipation efficiency. In particular, the temperature rise exceeds the standard under high load, affecting the life of components and the stability of equipment.
It adopts a vertical partition design with the circuit breaker mechanism at the bottom and the contactor mechanism at the top, combined with the rear-mounted connector layout, and increases the heat dissipation area through a three-wall linkage heat dissipation hole design and uses thermally conductive silicone and a small cooling fan for forced air cooling to achieve efficient heat dissipation.
It improves electrical safety distances, shortens module replacement time, reduces temperature rise, extends component life, and enhances equipment operational stability and environmental adaptability.
Smart Images
Figure CN224555077U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical cabinet structure, and in particular to an electrical drawer with a control circuit. Background Technology
[0002] In existing low-voltage drawer-type switchgear, the control circuit drawers face two major technical bottlenecks due to space constraints: First, large components such as circuit breakers and contactors are difficult to arrange rationally within a limited space, resulting in insufficient electrical safety distances and maintenance difficulties; second, components generate concentrated heat under high current conditions, and traditional heat dissipation designs are inefficient, with sidewall opening rates of less than 10%, leading to excessive temperature rise and a reduction in component lifespan of more than 30%. This contradiction between heat dissipation and layout is particularly pronounced for high-load drawers of 630A and above, necessitating an innovative structure that integrates optimized spatial architecture and efficient heat dissipation paths. Utility Model Content
[0003] The purpose of this invention is to provide an electrical drawer with a control circuit to solve the above-mentioned problems.
[0004] According to one aspect of this utility model, an electrical drawer with a control circuit is provided, comprising: a drawer body having a mounting cavity, a left side wall, a right side wall, a rear side wall, and a bottom side wall; a circuit breaker mechanism disposed in the lower part of the mounting cavity and adjacent to the bottom side wall; a contactor mechanism disposed in the upper part of the mounting cavity, the contactor mechanism being electrically connected to the circuit breaker mechanism via a first copper busbar; and a connector mechanism disposed on the rear side wall, the connector mechanism being electrically connected to the circuit breaker mechanism via a second copper busbar and to the contactor mechanism via a third copper busbar; the left side wall, right side wall, and bottom side wall are all provided with heat dissipation holes, the total area of which accounts for 15%-20% of the sum of the surface areas of the three walls.
[0005] In some embodiments, the circuit breaker mechanism includes a first mounting bracket and a circuit breaker body. The first mounting bracket is disposed at the lower part of the mounting cavity, and the circuit breaker body is disposed at the front side of the first mounting bracket. A first clearance hole is provided on one side of the first mounting bracket for the second copper busbar to pass through.
[0006] In some embodiments, the contactor mechanism includes a second mounting bracket and a contactor body. The second mounting bracket is disposed on the upper part of the mounting cavity, and the contactor body is disposed on the front side of the second mounting bracket. A second clearance hole is provided on one side of the second mounting bracket for the third copper busbar to pass through.
[0007] In some embodiments, the connector mechanism includes a third mounting bracket and a plurality of connectors. The rear sidewall has a third through hole for the third mounting bracket to be installed. The third mounting bracket is fixed to the third through hole by bolts. The plurality of connectors are spaced apart on the third mounting bracket.
[0008] In some embodiments, the vertical distance between the circuit breaker mechanism and the contactor mechanism is ≥50mm.
[0009] In some embodiments, the heat dissipation holes on the left and right sides are circular array holes with a diameter of 5 mm; the heat dissipation holes on the bottom sidewall are longitudinal strip holes with a length of 30-50 mm, a width of 3 mm, and a spacing of 8 mm.
[0010] In some embodiments, the circuit breaker body is bonded with a plurality of heat sinks by thermally conductive silicone.
[0011] In some embodiments, a small cooling fan is provided on one side of the mounting cavity, with the air outlet of the small cooling fan facing the heat dissipation hole.
[0012] Compared with the prior art, the beneficial effects of this application are as follows:
[0013] This utility model improves the compliance rate of electrical safety distance and shortens module replacement time through a vertical partition design with the circuit breaker mechanism at the bottom and the contactor mechanism at the top, combined with the rear-mounted layout of the plug-in components; the three-wall linkage heat dissipation hole design, combined with the combination of strip holes and array holes, achieves a heat dissipation area of more than twice that of traditional structures, and reduces the temperature rise under a measured 630A load; through the synergistic effect of hierarchical spatial layout and composite heat dissipation structure, an innovative structure that integrates and optimizes space and efficient heat dissipation path is achieved. Attached Figure Description
[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0015] Figure 2 This is a schematic diagram of the rear structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the bottom structure of this utility model;
[0017] Figure 4 For the internal structural connection of this utility model Figure 1 ;
[0018] Figure 5 For the internal structural connection of this utility model Figure 2 . Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] refer to Figures 1 to 5 This application provides an electrical drawer with a control circuit, comprising: a drawer body 1, having a mounting cavity, a left side wall 2, a right side wall 3, a rear side wall 4, and a bottom side wall 5; a circuit breaker mechanism disposed in the lower part of the mounting cavity and adjacent to the bottom side wall 5; a contactor mechanism disposed in the upper part of the mounting cavity, the contactor mechanism being electrically connected to the circuit breaker mechanism via a first copper busbar 6; and a connector mechanism disposed on the rear side wall 4, the connector mechanism being electrically connected to the circuit breaker mechanism via a second copper busbar 7 and to the contactor mechanism via a third copper busbar 8; the left side wall 2, the right side wall 3, and the bottom side wall 5 are all provided with heat dissipation holes 9, the total area of the heat dissipation holes 9 accounting for 15%-20% of the sum of the surface areas of the three walls.
[0021] In some embodiments, the circuit breaker mechanism includes a first mounting bracket 10 and a circuit breaker body 11. The first mounting bracket 10 is disposed at the lower part of the mounting cavity, and the circuit breaker body 11 is disposed at the front side of the first mounting bracket 10. A first clearance hole 12 for the second copper busbar 7 to pass through is provided on one side of the first mounting bracket 10.
[0022] In some embodiments, the contactor mechanism includes a second mounting bracket 13 and a contactor body 14. The second mounting bracket 13 is disposed on the upper part of the mounting cavity, and the contactor body 14 is disposed on the front side of the second mounting bracket 13. A second clearance hole 15 is provided on one side of the second mounting bracket 13 for the third copper busbar 8 to pass through.
[0023] In some embodiments, the connector mechanism includes a third mounting bracket and a plurality of connectors 16. The rear sidewall 4 has a third through hole for mounting the third mounting bracket. The third mounting bracket is fixed to the third through hole by bolts. The plurality of connectors 16 are spaced apart on the third mounting bracket.
[0024] In some embodiments, the vertical distance between the circuit breaker mechanism and the contactor mechanism is ≥50mm.
[0025] In some embodiments, the heat dissipation holes 9 of the left side wall 2 and the right side wall 3 are circular array holes with a diameter of 5 mm; the heat dissipation holes 9 of the bottom side wall 5 are longitudinal strip holes with a length of 30-50 mm, a width of 3 mm, and a spacing of 8 mm.
[0026] In some embodiments, the circuit breaker body 11 has several heat sinks bonded to it with thermally conductive silicone. The heat sinks are typically made of a metal material with good thermal conductivity, such as aluminum alloy, to improve heat dissipation by increasing the heat dissipation area.
[0027] In some embodiments, a small cooling fan is provided on one side of the mounting cavity, with the air outlet of the small cooling fan facing the heat dissipation hole 9. When the components inside the drawer generate a large amount of heat and natural heat dissipation is insufficient, forced air cooling can be considered. Installing a small cooling fan inside the drawer accelerates airflow and improves heat dissipation efficiency through the rotation of the small cooling fan.
[0028] A stable temperature environment helps ensure the normal operating characteristics of components, reduces fluctuations in electrical parameters caused by temperature changes, thereby improving the operational stability and reliability of the control loop, reducing the probability of equipment failure, and improving the overall operating efficiency of the system.
[0029] Lower operating temperatures can slow down the aging of components, extend their lifespan, reduce the frequency of equipment replacement, lower operating costs, and increase the return on investment.
[0030] A good spatial layout can reduce electromagnetic interference between components, while effective heat dissipation measures can ensure that components operate at a suitable temperature. The combined effect of these two factors helps to improve the electrical performance of the control loop, such as the accuracy of signal transmission and the precision of control.
[0031] The optimized spatial layout and heat dissipation design enable the electrical drawer to adapt to a wider range of working temperature environments, ensuring normal operation of the equipment in both high-temperature environments and poorly ventilated locations, thus improving the equipment's environmental adaptability and application flexibility.
[0032] This utility model improves the compliance rate of electrical safety distance and shortens the module replacement time by using a vertical partition design with the circuit breaker mechanism at the bottom and the contactor mechanism at the top, combined with the rear-mounted layout of the plug-in component 16. The design of the three-wall linkage heat dissipation hole 9, combined with the combination of strip holes and array holes, achieves a heat dissipation area of more than twice that of the traditional structure, and the measured temperature rise under a 630A load is reduced. Through the synergistic effect of hierarchical spatial layout and composite heat dissipation structure, an innovative structure that integrates and optimizes space and efficient heat dissipation path is achieved.
[0033] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An electrical drawer with a control circuit, characterized in that, include: The drawer body is provided with a mounting cavity, a left side wall, a right side wall, a rear side wall, and a bottom side wall; The circuit breaker mechanism is located in the lower part of the mounting cavity and adjacent to the bottom sidewall; A contactor mechanism is disposed in the upper part of the mounting cavity, and the contactor mechanism is electrically connected to the circuit breaker mechanism through a first copper busbar; A connector mechanism is disposed on the rear side wall. The connector mechanism is electrically connected to the circuit breaker mechanism through a second copper busbar and to the contactor mechanism through a third copper busbar. The left side wall, right side wall, and bottom side wall are all provided with heat dissipation holes, and the total area of the heat dissipation holes accounts for 15%-20% of the sum of the surface areas of the three walls.
2. The electrical drawer with control circuit according to claim 1, characterized in that, The circuit breaker mechanism includes a first mounting bracket and a circuit breaker body. The first mounting bracket is disposed at the lower part of the mounting cavity, and the circuit breaker body is disposed at the front side of the first mounting bracket. A first clearance hole is provided on one side of the first mounting bracket for the second copper busbar to pass through.
3. The electrical drawer with control circuit according to claim 1, characterized in that, The contactor mechanism includes a second mounting bracket and a contactor body. The second mounting bracket is disposed on the upper part of the mounting cavity, and the contactor body is disposed on the front side of the second mounting bracket. A second clearance hole is provided on one side of the second mounting bracket for the third copper busbar to pass through.
4. The electrical drawer with control circuit according to claim 1, characterized in that, The connector mechanism includes a third mounting bracket and several connectors. The rear side wall has a third through hole for the third mounting bracket to be installed. The third mounting bracket is fixed to the third through hole by bolts. Several connectors are spaced apart on the third mounting bracket.
5. The electrical drawer with control circuit according to claim 1, characterized in that, The vertical distance between the circuit breaker mechanism and the contactor mechanism is ≥50mm.
6. The electrical drawer with control circuit according to claim 1, characterized in that, The heat dissipation holes on the left and right sides are circular array holes with a diameter of 5mm; the heat dissipation holes on the bottom sidewall are longitudinal strip holes with a length of 30-50mm, a width of 3mm, and a spacing of 8mm.
7. The electrical drawer with control circuit according to claim 2, characterized in that, The circuit breaker body has several heat sinks bonded together with thermally conductive silicone.
8. The electrical drawer with control circuit according to claim 1, characterized in that, A small cooling fan is provided on one side of the mounting cavity, and the air outlet of the small cooling fan faces the heat dissipation hole.