Heat dissipation device of power distribution cabinet

Abstract

The utility model relates to the field of heat dissipation of power distribution cabinets, and discloses a heat dissipation device of a power distribution cabinet, which comprises a mounting rack, a wind scooper is detachably arranged in the mounting rack, the wind scooper is of an axially expanded rectangular cone structure and is composed of a small-end section and a large-end section, an air inlet fan is arranged in the small-end section, and an air outlet fan is arranged in the large-end section. An exhaust fan is installed in the large-end section, flanges are fixed to the left end and the right end of the installation frame respectively, and the flange on the left side is connected with the side wall of a hot cavity of the power distribution cabinet in a sealed mode through bolts. According to the utility model, because the wind scooper adopts the rectangular cone structure which expands axially, the air flow forms pressure difference in the expansion process, the cross section area of the large end is large, the exhaust back pressure is reduced, the overall heat dissipation efficiency is improved, the formation of eddy current in the cabinet is avoided, and the rapid and stable heat dissipation effect is ensured.

Description

Technical Field

[0001] This utility model relates to the technical field of power distribution cabinets, specifically to a heat dissipation device for power distribution cabinets. Background Technology

[0002] As a crucial component of power systems, distribution cabinets are widely used in power transmission and control, typically integrating numerous electrical components and control circuits. Under high-power operation or prolonged loads, distribution cabinets generate significant heat. If this heat is not dissipated promptly, it can not only reduce the efficiency of electrical components but also lead to overheating, insulation aging, and even safety accidents. Therefore, heat dissipation in distribution cabinets has become a critical issue for ensuring the stable operation of power systems.

[0003] Traditional heat dissipation methods for electrical distribution cabinets mainly include natural convection, forced air cooling, and liquid cooling. While natural convection is simple in structure and low in cost, its heat dissipation efficiency is limited and it is difficult to meet the heat dissipation requirements of high-power electrical equipment. Liquid cooling systems, although providing significant heat dissipation, are complex in structure, expensive, and require an additional liquid circulation system, making them unsuitable for small and medium-sized electrical distribution cabinets. Therefore, forced air cooling has become the primary choice for heat dissipation devices in electrical distribution cabinets.

[0004] However, existing forced air cooling structures generally have the following problems: the heat dissipation airflow path is unstable, and eddies are easily formed inside the cabinet, resulting in a decrease in heat dissipation efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a heat dissipation device for a power distribution cabinet to solve the problem of unstable airflow path, which easily forms vortices inside the cabinet and leads to a decrease in heat dissipation efficiency.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a heat dissipation device for a power distribution cabinet, including a mounting frame, wherein a detachable air guide shroud is provided inside the mounting frame, the air guide shroud is an axially extended rectangular cone structure, consisting of a small end section and a large end section, an air intake fan is installed inside the small end section, an exhaust fan is installed inside the large end section, and flanges are fixed at the left and right ends of the mounting frame, wherein the left flange is sealed to the heat cavity side wall of the power distribution cabinet by bolts.

[0007] Preferably, a connecting block is connected to the mounting bracket, a traction rod is provided on the connecting block, a fixing member is hinged to the top of the traction rod, and the fixing member is fixed to the side wall of the power distribution cabinet.

[0008] Preferably, the connecting block has a groove, a slider is slidably disposed in the groove, a hinge block is connected to the slider, and the hinge block is detachably hinged to the bottom end of the traction rod.

[0009] Preferably, the connecting block has a second threaded hole, a threaded rod is threadedly connected to the second threaded hole, and a pressure plate is connected to the threaded end of the threaded rod.

[0010] Preferably, the four outer walls on the left side of the air guide shroud are respectively provided with docking grooves, and support columns are inserted into the docking grooves. The top of the support column is connected to the mounting frame by bolts. The right end of the air guide shroud directly abuts against the right inner side of the mounting frame to form axial positioning.

[0011] Preferably, an annular rubber pad is provided between the contact surface of the air guide shroud and the mounting bracket, the annular rubber pad is connected to the right end of the air guide shroud, and a filter screen is provided at the air outlet end of the exhaust fan.

[0012] Compared with the prior art, the heat dissipation device of a power distribution cabinet that adopts the above technical solution has the following advantages:

[0013] Beneficial effects:

[0014] 1. After the intake fan is started, the heat inside the distribution cabinet is drawn into the air guide shroud and then discharged by the exhaust fan, forming a directional airflow from the small end cross-section to the large end cross-section. Because the air guide shroud adopts an axially expanding rectangular cone structure, a pressure difference is formed during the airflow expansion process. The large end cross-sectional area is larger, which reduces the exhaust back pressure, improves the overall heat dissipation efficiency, avoids the formation of eddies inside the cabinet, and ensures a rapid and stable heat dissipation effect.

[0015] Second, during the fixing process, workers can push the slider to slide within the groove, causing the traction rod, mounting frame, and side wall of the distribution cabinet to form a triangular support structure, thereby enhancing the stability of the overall structure. Subsequently, by rotating the threaded rod, the clamping plate is driven to make tight contact with the bottom surface of the groove, locking the slider's position and ensuring the safety of the entire device when installed at heights or underground.

[0016] Thirdly, by supporting the small end section of the air guide shroud with several support columns, the structural rigidity of the air guide shroud can be effectively enhanced, preventing deformation or loosening due to wind pressure, vibration and other factors during long-term use, and further improving the overall reliability and stability of the heat dissipation device. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of an embodiment.

[0018] Figure 2 This is a breakdown diagram of an embodiment.

[0019] Figure 3 This is a schematic diagram showing the disassembled mounting bracket and air guide cover in an embodiment.

[0020] Figure 4 This is a cross-sectional schematic diagram of the connecting block in an embodiment.

[0021] Figure 5 This is a schematic cross-sectional view of the slider in an embodiment.

[0022] In the diagram: 1. Mounting bracket; 2. Air guide hood; 201. Small end section; 202. Large end section; 3. Inlet fan; 4. Exhaust fan; 5. Flange; 7. Connecting block; 8. Traction rod; 9. Fixing component; 10. Slide groove; 11. Sliding block; 12. Second threaded hole; 13. Threaded rod; 14. Pressure plate; 15. Hinge block; 16. Connecting groove; 17. Support column; 18. Filter screen; 19. Annular rubber pad. Detailed Implementation

[0023] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0024] like Figures 1-3 As shown, a heat dissipation device for a power distribution cabinet includes a mounting frame 1. A detachable air guide shroud 2 is installed inside the mounting frame 1. The air guide shroud 2 is an axially expanding rectangular cone structure, consisting of a small end section 201 and a large end section 202. An intake fan 3 is installed inside the small end section 201, and an exhaust fan 4 is installed inside the large end section 202. Both the intake fan 3 and the exhaust fan 4 are axial flow fans. Flanges 5 are fixed at the left and right ends of the mounting frame 1, respectively. The left flange 5 is sealed to the side wall of the heat chamber of the power distribution cabinet by bolts (not shown in the figure).

[0025] In actual use, the operator first installs the overall heat dissipation device onto the heat chamber side wall of the distribution cabinet via the left flange 5. During installation, a rectangular through hole corresponding to flange 5 needs to be made on the side wall of the distribution cabinet to achieve a sealed connection. The entire device should be installed horizontally to ensure that the axial expansion structure of the air guide shroud 2 can effectively guide the airflow.

[0026] After the intake fan 3 is started, the heat inside the distribution cabinet is drawn into the air guide shroud 2 and then discharged by the exhaust fan 4, forming a directional airflow from the small end section 201 to the large end section 202. Because the air guide shroud 2 adopts an axially expanding rectangular cone structure, a pressure difference is formed during the airflow expansion process. The large end section 202 has a larger area, which reduces the exhaust back pressure, improves the overall heat dissipation efficiency, avoids the formation of vortices inside the cabinet, and ensures a rapid and stable heat dissipation effect.

[0027] like Figure 1 , Figure 4 and Figure 5As shown, a connecting block 7 is connected to the mounting bracket 1, and a traction rod 8 is provided on the connecting block 7. A fixing member 9 is hinged to the top of the traction rod 8, and the fixing member 9 is fixed to the side wall of the distribution cabinet. A sliding groove 10 is provided on the connecting block 7, and a slider 11 is slidably arranged in the sliding groove 10. A hinge block 15 is connected to the slider 11, and the hinge block 15 is detachably hinged to the bottom end of the traction rod 8. A second threaded hole 12 is provided on the connecting block 7, and a threaded rod 13 is threadedly connected in the second threaded hole 12. A pressure plate 14 is connected to the threaded end of the threaded rod 13.

[0028] During the fixing process, the operator can push the slider 11 to slide within the groove 10, so that the traction rod 8, the mounting frame 1, and the side wall of the distribution cabinet form a triangular support structure to enhance the stability of the overall structure. Subsequently, by rotating the threaded rod 13, the clamping plate 14 is driven to make tight contact with the bottom surface of the groove 10, thereby locking the position of the slider 11 and ensuring the safety of the entire device when installed at height or underground.

[0029] like Figures 1-3 As shown, the four outer walls on the left side of the air guide shroud 2 are respectively provided with docking grooves 16, and support columns 17 are inserted into the docking grooves 16. The top of the support column 17 is connected to the mounting frame 1 by bolts. The right end of the air guide shroud 2 directly abuts against the right inner side of the mounting frame 1 to form axial positioning.

[0030] In addition, by supporting the small end section 201 of the air guide shroud 2 with several support columns 17, the structural rigidity of the air guide shroud 2 can be effectively enhanced, preventing deformation or loosening due to wind pressure, vibration and other factors during long-term use, and further improving the overall reliability and stability of the heat dissipation device.

[0031] like Figures 1-3 As shown, an annular rubber pad 19 is provided between the contact surfaces of the air guide shroud 2 and the mounting bracket 1. The annular rubber pad 19 is connected to the right end of the air guide shroud 2, and a filter screen 18 is provided at the air outlet end of the exhaust fan 4.

[0032] In this device, the annular rubber pad 19 is made of soft material with a certain degree of elasticity, which can buffer the mechanical stress between the air guide shroud 2 and the mounting bracket 1, reduce material fatigue and wear caused by long-term vibration and impact, and extend the overall service life of the equipment. The filter screen 18 can prevent debris or small foreign objects from entering the power distribution cabinet through the air guide shroud 2, protecting the normal operation of the equipment inside the cabinet.

[0033] This device requires an independent control module, which is electrically connected to the intake fan 3 and the exhaust fan 4. The control module is existing technology and includes the following key components:

[0034] Temperature sensor: Real-time monitoring of the internal temperature of the distribution cabinet, providing accurate temperature signals; PWM control circuit: Used to adjust the speed of intake fan 3 and exhaust fan 4 to ensure airflow matching and reduce eddy currents; Main control chip: Responsible for analyzing temperature data and controlling the start and stop of the fans according to preset temperature thresholds; Fault alarm module: Issues alarm signals in case of abnormal temperature, fan failure, or overload; Power management module: Ensures stable operation of the entire control system under voltage fluctuations, protecting the safety of electrical equipment. This control module can automatically adjust the fan speed based on real-time temperature data inside the distribution cabinet.

[0035] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A heat dissipating device for an electrical distribution cabinet comprising a mounting frame (1), characterized in that, The mounting bracket (1) is detachably equipped with an air guide hood (2). The air guide hood (2) is an axially extended rectangular cone structure, consisting of a small end section (201) and a large end section (202). An air intake fan (3) is installed in the small end section (201), and an exhaust fan (4) is installed in the large end section (202). Flanges (5) are fixed at the left and right ends of the mounting bracket (1), wherein the left flange (5) is sealed to the hot cavity side wall of the power distribution cabinet by bolts.

2. The heat dissipating device of a power distribution cabinet according to claim 1, characterized in that: The mounting bracket (1) is connected to a connecting block (7), and a traction rod (8) is provided on the connecting block (7). A fixing member (9) is hinged to the top of the traction rod (8), and the fixing member (9) is fixed to the side wall of the power distribution cabinet.

3. The heat dissipating device of a power distribution cabinet according to claim 2, characterized in that: The connecting block (7) has a groove (10) and a slider (11) is slidably arranged in the groove (10). A hinge block (15) is connected to the slider (11) and the hinge block (15) is detachably hinged to the bottom end of the traction rod (8).

4. The heat dissipating device of a power distribution cabinet according to claim 2, characterized in that: The connecting block (7) has a second threaded hole (12), and a threaded rod (13) is threadedly connected to the second threaded hole (12). The threaded end of the threaded rod (13) is connected to a pressure plate (14).

5. The heat dissipating device of an electrical switchgear cabinet according to claim 1, wherein: The air guide cover (2) has four connecting grooves (16) on its left side outer wall. A support column (17) is inserted in the connecting groove (16). The top of the support column (17) is connected to the mounting frame (1) by bolts. The right end of the air guide cover (2) directly abuts against the right inner side of the mounting frame (1) to form axial positioning.

6. The heat dissipating device of an electrical switch board according to claim 1, wherein: An annular rubber pad (19) is provided between the contact surfaces of the air guide shroud (2) and the mounting bracket (1). The annular rubber pad (19) is connected to the right end of the air guide shroud (2). A filter screen (18) is provided at the air outlet end of the exhaust fan (4).

Images