A circulating air duct structure of a power distribution cabinet

Abstract

The utility model discloses a circulating air flue structure of switch board relates to switch board technical field, the utility model discloses a cabinet body, and the bottom end of cabinet body back is equipped with the air inlet, and the top of cabinet body is equipped with the two exhaust port of symmetrical distribution, and the fan is fixedly installed in two exhaust port places of cabinet body inside, and the baffle is fixedly installed in cabinet body inside, and the multiple through -slots of the distribution of upper and lower lamps are equipped on the baffle, and the middle part of multiple through -slots is fixedly installed with the mounting plate, and the back of multiple mounting plates is fixedly installed with the mirror image distribution's second baffle and first baffle of two ends, and the main air flue is formed between the baffle and cabinet back plate, in the utility model discloses, make outside air from the air inlet, and outside air is first isolated into the main air flue of baffle, and through the effect of first baffle, second baffle, formed a complete air flow circulation air flue, make the air flow effectively flow through all electric components, avoid local overheating to improve the heat dissipation efficiency greatly.

Description

Technical Field

[0001] This utility model relates to the field of power distribution cabinet technology, specifically to a circulating air duct structure for a power distribution cabinet. Background Technology

[0002] As the core equipment for power distribution and control, the distribution cabinet integrates various electronic and electrical components such as circuit breakers, contactors, frequency converters, and PLC modules. These components generate heat during operation, causing the temperature inside the cabinet to rise. In particular, high-power devices, such as frequency converters and braking resistors, generate concentrated high heat flux densities, forming "hot spots."

[0003] Currently, common heat dissipation methods mainly include natural ventilation and forced ventilation. Natural ventilation utilizes the "chimney effect"—hot air rises naturally due to its lower density—by creating ventilation holes at the top and bottom of the cabinet to form natural convection. However, this method has low heat dissipation efficiency, depends on ambient temperature, and has poor dust and moisture resistance. Forced ventilation involves installing exhaust fans on the cabinet for forced ventilation, as illustrated in the following example: Existing patent CN 219086627 U discloses a low-voltage distribution cabinet with a heat dissipation duct structure, including a cabinet body. A horizontal partition is provided at the bottom of the cabinet body, dividing the internal space into a receiving space and a heat dissipation duct. A through groove is provided in the middle of the horizontal partition, within which a horizontally rotating downward-exhausting exhaust blade is installed. A vertical rotating shaft is provided on the shaft of the exhaust blade, extending downward and fixedly connected to a motor output shaft fixed at the bottom of the heat dissipation duct. The motor drives the exhaust blade to rotate via the vertical rotating shaft. A first bevel gear is coaxially mounted on the vertical rotating shaft located within the heat dissipation duct. A second bevel gear meshes with the first bevel gear, and the second bevel gear is connected to an exhaust blade rotating vertically. This utility model requires less power; the blade is fixed within the cabinet, preventing the blade wires from becoming entangled with other wiring within the cabinet; the structure is simple, and the heat dissipation duct and related devices do not occupy a large space within the cabinet.

[0004] However, this forced ventilation method has some shortcomings: First, the airflow organization is chaotic. After the outside air enters from the air inlet, it is often directly discharged from the air outlet without effective guidance, forming an "airflow short circuit" and failing to effectively flow through all heat-generating components. Second, the dense installation of equipment inside the cabinet will obstruct the airflow, causing some areas to form heat dissipation dead zones, heat accumulation, and local overheating. Local overheating will accelerate the aging of insulation materials, leading to performance degradation, malfunction, or even permanent damage to electronic components, seriously threatening the safe, stable, and reliable operation of the power distribution system. Utility Model Content

[0005] In order to solve the problem that the equipment installed in the cabinet in the existing technology can obstruct the airflow and cannot effectively guide the airflow through all the heat-generating components, which can easily lead to the formation of heat dissipation dead zones in some areas, heat accumulation, and local overheating; the purpose of this utility model is to provide a circulating air duct structure for the power distribution cabinet.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a circulating air duct structure for a power distribution cabinet, including a cabinet body, a cabinet door hinged to one side of the cabinet body, an air inlet at the bottom of the back of the cabinet body, two symmetrically distributed exhaust vents at the top of the cabinet body, a fan fixedly installed at each of the two exhaust vents inside the cabinet body, a partition fixedly installed inside the cabinet body, multiple through slots with upper and lower light fixtures distributed on the partition, a mounting plate fixedly installed in the middle of each of the multiple through slots, and a mirror-distributed second guide plate and a first guide plate fixedly installed at the upper and lower ends of the back of the multiple mounting plates, forming a main air duct between the partition and the back panel of the cabinet body, the multiple through slots on the partition are divided into an air inlet area and an air outlet area through the corresponding mounting plate and the first guide plate and the second guide plate, the air inlet area is located below the mounting plate and near the first guide plate of the multiple through slots on the partition, and the air outlet area is located above the mounting plate and near the second guide plate of the multiple through slots on the partition.

[0007] Preferably, dust filters can be detachably installed at the air inlet and two exhaust outlets on the back of the cabinet. Limiting components are installed at the air inlet and two exhaust outlets on the back of the cabinet. Each of the three limiting components includes a sleeve, and the sleeve is fixedly installed on the back of the cabinet. A limiting rod is slidably installed inside each of the three sleeves. A lever is fixedly installed at one end of each of the three limiting rods. A spring is fixedly installed inside each of the three sleeves, and one end of the spring contacts one end of the corresponding limiting rod. A limiting ring is fixedly installed at one end of each of the three dust filters, and one end of the limiting rod can be inserted into the corresponding limiting ring.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0009] 1. In this utility model, after the fan is started, a negative pressure is generated inside the cabinet, which allows external air to enter through the air inlet. The external air is first guided into the main air duct isolated by the partition. In the main air duct, the air flows upward and forms a complete airflow circulation duct through the action of the first guide plate and the second guide plate, so that the airflow can effectively flow through all electrical components, avoid local overheating, and thus greatly improve the heat dissipation efficiency.

[0010] 2. In this utility model, by setting a limiting component, when it is necessary to disassemble, clean or replace the dustproof net, the lever can be used to drive the limiting rod to slide and retract into the sleeve and compress the spring. At the same time, one end of the limiting rod is pulled out from the limiting ring on the dustproof net, releasing the limiting of the dustproof net, so that the dustproof net can be removed for cleaning or replacement. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the overall rear structure of this utility model;

[0014] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0015] Figure 4 This is a schematic diagram of the back structure of the cabinet of this utility model;

[0016] Figure 5 This is a schematic diagram of the cross-sectional structure of the cabinet and partition of this utility model;

[0017] Figure 6 This is a schematic diagram of the limiting component structure of this utility model.

[0018] In the diagram: 1. Cabinet; 101. Air inlet; 102. Air outlet; 2. Cabinet door; 3. Dustproof net; 4. Limiting component; 401. Sleeve; 402. Limiting rod; 403. Toggle lever; 404. Spring; 405. Limiting ring; 5. Partition; 501. Through groove; 6. Mounting plate; 7. First guide plate; 8. Second guide plate; 9. Air inlet area; 10. Air outlet area; 11. Fan. 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] Example: Figure 1-6As shown, this utility model provides a circulating air duct structure for a power distribution cabinet, including a cabinet body 1, which is an existing power distribution cabinet. A cabinet door 2 is hinged to one side of the cabinet body 1. An air inlet 101 is opened at the bottom of the back of the cabinet body 1, and two symmetrically distributed exhaust vents 102 are opened at the top of the cabinet body 1. Fans 11 are fixedly installed at both exhaust vents 102 inside the cabinet body 1. A partition 5 is fixedly installed inside the cabinet body 1. Multiple through slots 501 with upper and lower light fixtures are opened on the partition 5. Mounting plates 6 are fixedly installed in the middle of the multiple through slots 501. Second guide plates 8 and first guide plates 7 are fixedly installed at the upper and lower ends of the back of the multiple mounting plates 6. The interior of the cabinet body 1 is divided into front and rear parts by a vertically set metal partition 5. The partition 5 and the back panel of the cabinet body 1 form a main air duct, which can be used to install electrical components inside the power distribution cabinet on the mounting plates 6. During operation, components such as circuit breakers, contactors, frequency converters, and PLCs generate heat. Fan 11 can be activated, creating negative pressure inside the cabinet, which draws in external air through the air inlet 101. The external air is first guided into the main air duct, where it flows upward and is precisely blown onto the electrical components mounted on the mounting plate 6 via the downward-sloping first guide plate 7, thus cooling them. As the air flows over the surface of the components, it absorbs heat and becomes hot air. Due to the continuous operation of fan 11 and the upward-sloping second guide plate 8, the hot air flows back into the main air duct. The hot air rises within the main air duct and is eventually drawn out of the cabinet by the top fan 11 through the exhaust port 102. This forms a complete airflow circulation duct, allowing the airflow to effectively pass through all electrical components, preventing localized overheating and greatly improving heat dissipation efficiency.

[0021] The multiple slots 501 on the partition 5 are divided into an air inlet zone 9 and an air outlet zone 10 by the corresponding mounting plate 6, the first guide plate 7, and the second guide plate 8. The air inlet zone 9 is located below the mounting plate 6 and near the first guide plate 7, while the air outlet zone 10 is located above the mounting plate 6 and near the second guide plate 8. This allows the airflow to pass through the air inlet zone 9 at the downward-sloping first guide plate 7 and be precisely blown towards the electrical components mounted on the mounting plate 6. The hot air is then returned to the main air duct through the air outlet zone 10 at the upward-sloping second guide plate 8, ensuring that the airflow effectively passes through all electrical components.

[0022] Dust filters 3 are detachably installed at the air inlet 101 and two exhaust vents 102 on the back of cabinet 1. Limiting components 4 are installed at each of the three limiting components 4, each including a sleeve 401, which is fixedly installed on the back of cabinet 1. Limiting rods 402 are slidably installed inside each of the three sleeves 401. A lever 403 is fixedly installed at one end of each of the three limiting rods 402. A spring 404 is fixedly installed inside each of the three sleeves 401, with one end of the spring 404 contacting one end of the corresponding limiting rod 402. One end of each of the three dust filters 3 is fixed. A limit ring 405 is installed, and one end of the limit rod 402 can be inserted into the corresponding limit ring 405. The dustproof net 3 can prevent external dust and other impurities from entering the cabinet 1 through the air inlet 101 and the air outlet 102 when the air is circulating, so as to keep the air inside the cabinet clean. When it is necessary to disassemble, clean or replace the dustproof net 3, the lever 403 can be used to drive the limit rod 402 to slide and retract into the sleeve 401 and compress the spring 404. At the same time, one end of the limit rod 402 is pulled out from the limit ring 405 on the dustproof net 3, releasing the limit on the dustproof net 3, so that the dustproof net 3 can be removed for cleaning or replacement.

[0023] Working principle: When in use, the fan 11 can be started. After the fan 11 is started, a negative pressure is generated inside the cabinet, which allows external air to enter through the air inlet 101. The external air is first guided into the main air duct. In the main air duct, the air flows upward and is precisely blown onto the electrical components mounted on the mounting plate 6 through the air inlet area 9 at the downward-sloping first guide plate 7, which dissipates heat and cools them. After flowing over the surface of the components, the air absorbs heat and becomes hot air. Due to the continuous operation of the fan 11, the hot air flows back into the main air duct through the air outlet area 10 at the upward-sloping second guide plate 8. The hot air rises in the main air duct and is finally drawn out of the cabinet by the top fan 11 through the exhaust port 102. This forms a complete airflow circulation duct, which allows the airflow to effectively flow through all electrical components, avoids local overheating, and thus greatly improves the heat dissipation efficiency.

[0024] The dustproof net 3 prevents external dust and other impurities from entering the cabinet 1 through the air inlet 101 and the air outlet 102 when the air is circulating, thus keeping the air inside the cabinet clean. When the dustproof net 3 needs to be disassembled for cleaning or replacement, the lever 403 can be used to drive the limit lever 402 to slide and retract into the sleeve 401 and compress the spring 404. At the same time, one end of the limit lever 402 is pulled out from the limit ring 405 on the dustproof net 3, releasing the limit on the dustproof net 3, so that the dustproof net 3 can be removed for cleaning or replacement.

[0025] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A circulating air duct structure for a power distribution cabinet, comprising a cabinet body (1), characterized in that: The cabinet (1) has a door (2) hinged on one side. The bottom of the back of the cabinet (1) has an air inlet (101). The top of the cabinet (1) has two symmetrically distributed exhaust vents (102). Fans (11) are fixedly installed at the two exhaust vents (102) inside the cabinet (1). A partition (5) is fixedly installed inside the cabinet (1). Multiple through slots (501) with upper and lower light fixtures are opened on the partition (5). Mounting plates (6) are fixedly installed in the middle of the multiple through slots (501). The upper and lower ends of the back of the multiple mounting plates (6) are fixedly installed with mirrored second guide plates (8) and first guide plates (7). The partition (5) and the back panel of the cabinet (1) form a main air duct.

2. The circulating air duct structure of a power distribution cabinet as described in claim 1, characterized in that, The multiple through slots (501) on the partition (5) are divided into an air inlet zone (9) and an air outlet zone (10) by the corresponding mounting plate (6) and the first guide plate (7) and the second guide plate (8).

3. The circulating air duct structure of a power distribution cabinet as described in claim 2, characterized in that, The air inlet area (9) is located below the mounting plate (6) and near the first guide plate (7) in the multiple through slots (501) on the partition plate (5), and the air outlet area (10) is located above the mounting plate (6) and near the second guide plate (8) in the multiple through slots (501) on the partition plate (5).

4. The circulating air duct structure of a power distribution cabinet as described in claim 1, characterized in that, Dustproof nets (3) can be detachably installed at the air inlet (101) and two exhaust outlets (102) on the back of the cabinet (1).

5. The circulating air duct structure of a power distribution cabinet as described in claim 1, characterized in that, Limiting components (4) are installed at the air inlet (101) and two air outlets (102) on the back of the cabinet (1). All three limiting components (4) include sleeves (401), and the sleeves (401) are fixedly installed on the back of the cabinet (1).

6. The circulating air duct structure of a power distribution cabinet as described in claim 5, characterized in that, Each of the three sleeves (401) has a limit rod (402) slidably installed inside it, and a lever (403) is fixedly installed at one end of each of the three limit rods (402).

7. The circulating air duct structure of a power distribution cabinet as described in claim 6, characterized in that, Springs (404) are fixedly installed inside each of the three sleeves (401), and one end of the spring (404) is in contact with one end of the corresponding limiting rod (402).

8. The circulating air duct structure of a power distribution cabinet as described in claim 4, characterized in that, Each of the three dustproof nets (3) has a fixed limit ring (405) installed at one end, and one end of the limit rod (402) can be inserted into the corresponding limit ring (405).

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