Ventilation mechanism of power distribution cabinet

Abstract

The utility model relates to the field of power distribution cabinet ventilation, and discloses a ventilation mechanism of a power distribution cabinet, which comprises an air outlet and an air inlet, the air outlet is arranged on the top surface of a power distribution cabinet body, the air inlet is arranged below the left side of the power distribution cabinet body, and a fixing frame is detachably arranged below the right side of the outer wall of the power distribution cabinet body. An air inlet is formed in the right side of the outer wall of the power distribution cabinet body, a fixing frame is arranged on the right side of the outer wall of the power distribution cabinet body, the fixing frame corresponds to the air inlet, a fan is fixed in the fixing frame, a temperature sensor is arranged on the inner wall of the power distribution cabinet body, and a PLC is arranged on the right side of the outer wall of the power distribution cabinet body and electrically connected with the fan and the temperature sensor. According to the utility model, the exhaust blade is opened, so that the exhaust port is communicated with the outside through the mounting port, and an exhaust path is provided for hot air. After the fan is started, external cold air is forcibly poured into the power distribution cabinet body. At the moment, air in the power distribution cabinet body rises due to heat, a hot-pressing effect is formed, and hot air is exhausted through an exhaust outlet.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution cabinet ventilation, and particularly relates to a ventilation mechanism for a power distribution cabinet. Background Art

[0002] In the power system, the power distribution cabinet is one of the important devices for distributing and controlling electric power. However, during the transmission and conversion of electric power, a large amount of heat is generated. If it is not discharged in time, the temperature inside the power distribution cabinet will rise, affecting the normal operation of the equipment and even possibly causing safety accidents such as fires.

[0003] According to the Chinese patent with the publication number: CN209266905U, a ventilation power distribution cabinet includes a cabinet body provided with a heat dissipation inlet and a heat dissipation outlet. A heat dissipation fan is arranged on the outer side of the cabinet body opposite to the heat dissipation inlet; the side wall of the cabinet body is of a double-layer structure and a heat dissipation flow channel is formed inside, and the heat dissipation flow channel communicates the heat dissipation inlet and the heat dissipation outlet; the cabinet body includes an inner cabinet wall and an outer cabinet wall arranged in parallel at intervals, and both the heat dissipation inlet and the heat dissipation outlet are arranged on the outer cabinet wall.

[0004] In the above solution, the heat dissipation fan continuously introduces air flow into the heat dissipation flow channel through the heat dissipation inlet, and the air flow will flow along the heat dissipation flow channel and finally be discharged from the heat dissipation outlet. The above solution still has the following disadvantages: Although this method can improve air circulation to a certain extent, since the heat generated by the electrical components heats the surrounding air, making the air hot and rising, this ventilation method may not be sufficient to capture and guide all the rising hot air to flow outwards. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a ventilation mechanism for a power distribution cabinet to solve the problem that, since the heat generated by the electrical components heats the surrounding air, making the air hot and rising, this ventilation method may not be sufficient to capture and guide all the rising hot air to flow outwards.

[0006] To achieve the above utility model purpose, the utility model adopts the following technical scheme: A ventilation mechanism for a power distribution cabinet includes an air exhaust port and an air inlet. The air exhaust port is opened on the top surface of the power distribution cabinet body, and the air inlet is opened at the lower left side of the power distribution cabinet body. A fixed frame is detachably arranged at the lower right side position of the outer wall of the power distribution cabinet body, and the fixed frame corresponds to the air inlet. A fan is fixed inside the fixed frame. A temperature sensor is arranged on the inner wall of the power distribution cabinet body, and a PLC controller is arranged on the outer wall at the right side of the power distribution cabinet body. The PLC controller is electrically connected to the fan and the temperature sensor.

[0007] Preferably, a sealing cover is fixed on the top surface of the power distribution cabinet body. Installation openings are opened on the left and right sides of the sealing cover, and exhaust blades are rotatably arranged inside the installation openings.

[0008] Preferably, limiting grooves are respectively formed on both sides of the inner wall of the installation opening. Transmission shafts are respectively fixed on both sides of the exhaust fan blade. The transmission shafts are rotatably arranged in the limiting grooves. Two fixing holes are formed on the front side of the sealing cover. The fixing holes communicate with the limiting grooves. A driving motor is fixed inside the fixing holes. The driving motor is electrically connected to the PLC controller. The output end of the driving motor is connected to one end of the transmission shaft.

[0009] Preferably, a limiting sliding groove is formed on the top surface of the fixing frame. A filter screen is detachably clamped inside the limiting sliding groove.

[0010] Preferably, a plurality of threaded grooves are formed on the right outer wall of the power distribution cabinet body. Bolts are inserted at the four corners of the fixing frame. The threaded ends of the bolts are in threaded connection with the inside of the threaded grooves.

[0011] Preferably, rubber strips are respectively fixed on the top surface and the bottom surface of the exhaust fan blade. The upper rubber strip is in contact with the inner top surface of the installation opening, and the lower rubber strip is in contact with the top surface of the power distribution cabinet body.

[0012] Compared with the prior art, a ventilation mechanism of a power distribution cabinet adopting the above technical scheme has the following

[0013] Beneficial effects:

[0014] 1. During use, the temperature sensor is responsible for monitoring the internal temperature of the power distribution cabinet body. When the internal temperature exceeds the preset threshold, the temperature sensor sends a signal to the PLC controller. After receiving the signal from the temperature sensor, the PLC controller issues a start command. This command activates both the driving motor and the fan simultaneously. After the driving motor starts, its output end begins to rotate. The rotation of the driving motor drives the transmission shaft, thereby opening the exhaust fan blade. The opening of the exhaust fan blade enables the exhaust port to communicate with the outside through the installation opening, providing a discharge path for the hot air. After the fan starts, it forcibly injects the external cold air into the interior of the power distribution cabinet body. At this time, the air inside the power distribution cabinet body rises due to heat, forming a thermal pressure effect, and the hot air is discharged through the exhaust port;

[0015] 2. During use, when the temperature inside the power distribution cabinet body drops to the safe range, the temperature sensor sends a signal to the PLC controller again. The PLC controller then sends stop commands to the fan and the driving motor. According to the stop command, the driving motor drives the exhaust fan blade to close through the rotation of the transmission shaft. The rubber strip ensures that the gaps between the exhaust fan blade, the sealing cover, and the power distribution cabinet body are in a sealed state after the exhaust fan blade closes;

[0016] III. During use, the filter screen is set at the air inlet to intercept rats or other small animals and prevent them from entering the interior of the power distribution cabinet body, protecting the internal circuits from damage. The staff can better disassemble the fixing frame through bolts, facilitating the regular maintenance of the fan by the staff. Description of the Drawings

[0017] Figure 1 Is a perspective view of the embodiment.

[0018] Figure 2 Is an exploded perspective view of the fixing frame and the sealing cover of the embodiment.

[0019] Figure 3 Is an exploded perspective view of the exhaust fan blade of the embodiment.

[0020] Figure 4 Is an exploded perspective view of the filter screen of the embodiment.

[0021] In the figure: 1, exhaust air outlet; 2, air inlet; 3, power distribution cabinet body; 4, fixing frame; 5, fan; 6, temperature sensor; 7, PLC controller; 8, sealing cover; 9, exhaust fan blade; 10, installation opening; 11, limit groove; 12, transmission shaft; 13, fixing hole; 14, drive motor; 15, limit sliding groove; 16, filter screen; 17, thread groove; 18, bolt; 19, rubber strip. Detailed Embodiment

[0022] The following will describe in detail the preferred embodiments of the present invention with reference to the accompanying drawings.

[0023] As Figures 1 - 4 shown, a ventilation mechanism of a power distribution cabinet includes an exhaust air outlet 1 and an air inlet 2. The exhaust air outlet 1 is opened on the top surface of the power distribution cabinet body 3, and the air inlet 2 is opened at the lower left side of the power distribution cabinet body 3. It is characterized in that a fixing frame 4 is detachably provided at the lower right side position of the outer wall of the power distribution cabinet body 3. The fixing frame 4 corresponds to the air inlet 2. A fan 5 is fixed inside the fixing frame 4. A temperature sensor 6 is provided on the inner wall of the power distribution cabinet body 3. A PLC controller 7 is provided on the outer wall of the right side of the power distribution cabinet body 3. The PLC controller 7 is electrically connected to the fan 5 and the temperature sensor 6. A sealing cover 8 is fixed on the top surface of the power distribution cabinet body 3. Installation openings 10 are opened on the left and right sides of the sealing cover 8. An exhaust fan blade 9 is rotatably provided inside the installation openings 10.

[0024] During use, the temperature sensor 6 is responsible for monitoring the internal temperature of the power distribution cabinet body 3. When the internal temperature exceeds the preset threshold, the temperature sensor 6 sends a signal to the PLC controller 7. After receiving the signal from the temperature sensor 6, the PLC controller 7 issues a start command. This command simultaneously activates the drive motor 14 and the fan 5. After the drive motor 14 starts, its output end begins to rotate. The rotation of the drive motor 14 drives the transmission shaft 12, thereby opening the exhaust fan blade 9. The opening of the exhaust fan blade 9 causes the exhaust port 1 to communicate with the outside through the mounting opening 10, providing a discharge path for the hot air. After the fan 5 starts, it forcibly injects the external cold air into the interior of the power distribution cabinet body 3. At this time, the air inside the power distribution cabinet body 3 rises due to heat, forming a thermal pressure effect, and the hot air is discharged through the exhaust port 1.

[0025] As Figures 1 - 4 shown, limiting grooves 11 are respectively opened on both sides of the inner wall of the mounting opening 10, transmission shafts 12 are respectively fixed on both sides of the exhaust fan blade 9, the transmission shafts 12 are rotatably arranged in the limiting grooves 11, two fixing holes 13 are opened on the front side of the sealing cover 8, the fixing holes 13 communicate with the limiting grooves 11, a drive motor 14 is fixed inside the fixing holes 13, the drive motor 14 is electrically connected to the PLC controller 7, the output end of the drive motor 14 is connected to one end of the transmission shaft 12, rubber strips 19 are respectively fixed on the top surface and the bottom surface of the exhaust fan blade 9, the upper rubber strip 19 is in contact with the inner top surface of the mounting opening 10, and the lower rubber strip 19 is in contact with the top surface of the power distribution cabinet body 3.

[0026] During use, when the temperature inside the power distribution cabinet body 3 drops to the safe range, the temperature sensor 6 sends a signal to the PLC controller 7 again. The PLC controller 7 then sends a stop command to the fan 5 and the drive motor 14. According to the stop command, the drive motor 14 drives the exhaust fan blade 9 to close through the rotation of the transmission shaft 12. The rubber strip 19 ensures that the gap between the exhaust fan blade 9 and the sealing cover 8 and the power distribution cabinet body 3 is in a sealed state after the exhaust fan blade 9 is closed.

[0027] As Figures 2 - 4 shown, a limiting sliding groove 15 is opened on the top surface of the fixing frame 4, a filter screen 16 is detachably clamped inside the limiting sliding groove 15, a plurality of threaded grooves 17 are opened on the right outer wall of the power distribution cabinet body 3, bolts 18 are inserted at the four corners of the fixing frame 4, and the threaded ends of the bolts 18 are threadedly connected to the inside of the threaded grooves 17.

[0028] During use, the filter screen 16 is arranged at the air inlet 2 to intercept rats or other small animals, prevent them from entering the interior of the power distribution cabinet body 3, and protect the internal circuits from damage. The staff can better disassemble the fixing frame 4 through the bolts 18, so as to facilitate the staff to regularly overhaul the fan 5.

[0029] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A ventilation mechanism for a power distribution cabinet, comprising an air outlet (1) and an air inlet (2). The air outlet (1) is opened on the top surface of the power distribution cabinet body (3), and the air inlet (2) is opened at the lower left side of the power distribution cabinet body (3). It is characterized in that, A fixed frame (4) is detachably arranged at the lower right position of the outer wall of the power distribution cabinet body (3). The fixed frame (4) corresponds to the air inlet (2). A fan (5) is fixed inside the fixed frame (4). A temperature sensor (6) is arranged on the inner wall of the power distribution cabinet body (3). A PLC controller (7) is arranged on the upper right side of the outer wall of the power distribution cabinet body (3). The PLC controller (7) is electrically connected to the fan (5) and the temperature sensor (6). A sealing cover (8) is fixed on the top surface of the power distribution cabinet body (3). Installation openings (10) are formed on the left and right sides of the sealing cover (8). Exhaust blades (9) are rotatably arranged inside the installation openings (10). Limiting grooves (11) are respectively formed on both sides of the inner wall of the installation opening (10). Transmission shafts (12) are respectively fixed on both sides of the exhaust blade (9). The transmission shafts (12) are rotatably arranged in the limiting grooves (11). Two fixing holes (13) are formed on the front side of the sealing cover (8). The fixing holes (13) communicate with the limiting grooves (11). A driving motor (14) is fixed inside the fixing holes (13). The driving motor (14) is electrically connected to the PLC controller (7). The output end of the driving motor (14) is connected to one end of the transmission shaft (12).

2. The ventilation mechanism of a power distribution cabinet according to claim 1, characterized in that: A limiting sliding groove (15) is formed on the top surface of the fixed frame (4). A filter screen (16) is detachably clamped inside the limiting sliding groove (15).

3. The ventilation mechanism of a power distribution cabinet according to claim 1, characterized in that: A plurality of threaded grooves (17) are formed on the right side of the outer wall of the power distribution cabinet body (3). Bolts (18) are inserted at the four corners of the fixed frame (4). The threaded ends of the bolts (18) are threadedly connected to the inside of the threaded grooves (17).

4. The ventilation mechanism of a power distribution cabinet according to claim 1, characterized in that: Rubber strips (19) are respectively fixed on the top surface and the bottom surface of the exhaust blade (9). The upper rubber strip (19) is in contact with the inner top surface of the installation opening (10). The lower rubber strip (19) is in contact with the top surface of the power distribution cabinet body (3).

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