Power distribution cabinet with anti-electromagnetic interference function

Abstract

The application discloses a power distribution cabinet with an anti-electromagnetic interference function, and relates to the technical field of power distribution cabinets.The power distribution cabinet comprises a cabinet body, a cabinet door and a base, the cabinet door is connected to the cabinet body through a hinge, the cabinet body comprises a shielding cover and a flow guide cover, the base comprises a dehumidifier, an air inlet base, a fan unit and a net box cover, the dehumidifier is arranged at the bottom of the cabinet body, the air inlet base, the fan unit and the net box cover are arranged at the back of the cabinet body, a refrigeration unit is further arranged in the cabinet body and the cabinet door, the refrigeration unit cools the power distribution cabinet, low-temperature airflow is blown into the cabinet body to cool the equipment in the power distribution cabinet, a dust curtain is used to prevent dust from entering the cabinet body, but the airflow in the cabinet body can pass through the dust curtain and flow out of the cabinet body, and the heat dissipation pipes are arranged in the gap between the outer plate and the shielding cover, so that the cooling airflow cools the heat dissipation pipes while flowing out of the cabinet body, dust is prevented from falling on the outside of the cabinet body while the airflow flows out of the cabinet body, and the heat dissipation efficiency of the cabinet body is maintained.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet technology, specifically a power distribution cabinet with electromagnetic interference protection function. Background Technology

[0002] With the rapid development of industrial automation and smart grids, power distribution cabinets, as core devices for power distribution and equipment protection, are widely used in complex electromagnetic environments such as factories, data centers, and communication base stations. In scenarios with strong electromagnetic interference, traditional power distribution cabinets are susceptible to interference from high-frequency noise and surge currents, which can cause internal electronic components to malfunction or be damaged. To address this, existing technologies often employ metal shielding shells, filtering circuits, and grounding designs to improve electromagnetic interference resistance. However, there is a significant contradiction between electromagnetic interference resistance design and the requirements for heat dissipation and dust removal.

[0003] On the one hand, to maintain electromagnetic shielding effectiveness, the cabinet needs to adopt a fully enclosed or minimally perforated structure, leading to internal heat accumulation, accelerated component aging, and even malfunctions. Existing heat dissipation solutions such as forced air cooling or perforated ventilation can improve temperature rise, but they compromise shielding integrity. Furthermore, external dust can easily enter the cabinet through the heat dissipation holes, forming conductive dust accumulation and further reducing the equipment's insulation performance. On the other hand, traditional dust removal technologies mostly rely on filters or periodic manual cleaning, such as installing dust filters at the air inlet. However, in high-dust environments, filters are prone to clogging and require frequent maintenance. Active dust removal devices (such as electrostatic dust removal modules) have problems such as high energy consumption and complex structures, making them difficult to adapt to the compact space of small and medium-sized distribution cabinets. Summary of the Invention

[0004] The purpose of this invention is to provide a power distribution cabinet with electromagnetic interference protection to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a power distribution cabinet with electromagnetic interference resistance, comprising a cabinet body, a cabinet door, and a base. The cabinet door is connected to the cabinet body via hinges. The cabinet body includes a shielding cover and a flow guide cover. The base includes a dehumidifier, an air intake seat, a blower unit, and a mesh cover. The dehumidifier is located at the bottom of the cabinet body. The air intake seat, blower unit, and mesh cover are located at the rear of the cabinet body. A refrigeration unit is also installed in the cabinet body and the cabinet door to cool the power distribution cabinet.

[0006] Furthermore, the flow guide shroud is composed of an inner layer plate and an outer layer plate, and the shielding cover is embedded between the inner layer plate and the outer layer plate. A dust curtain is provided between the outer layer plate and the shielding cover. The refrigeration unit includes a heat dissipation pipe, a compression pipe, a flexible telescopic pipe, an evaporation pipe, an expansion valve, and a compressor. The heat dissipation pipe is installed in the cabinet, and the evaporation pipe is installed in the cabinet door. The refrigeration unit is filled with refrigerant. Under the action of the compressor, the refrigerant is sent out from the compression port of the compressor and distributed to the heat dissipation pipes on both sides of the shielding cover through the compression pipe. The refrigerant dissipates heat to the outside in the heat dissipation pipe and collects in the flexible telescopic pipe. The refrigerant in the flexible telescopic pipe enters the evaporation pipe after passing through the expansion valve. The temperature of the evaporation pipe decreases, and the refrigerant flows to the negative pressure port of the compressor, realizing the internal circulation of the pipe.

[0007] Furthermore, the compression pipe is located at the bottom of the shielding cover, and the heat dissipation pipe is located on both sides and the top of the shielding cover. Both ends of the heat dissipation pipe pass through the guide cover and are connected to the compression pipe. One end of the flexible telescopic pipe is connected to the heat dissipation pipe, and the other end of the flexible telescopic pipe passes through the top of the guide cover and is connected to the cabinet door. Since the cabinet door needs to be opened and closed, the flexible telescopic pipe is used to connect the heat dissipation pipe and the evaporation pipe. The heat dissipation pipe is mainly distributed on the left and right sides of the shielding cover. Therefore, the heat dissipated by the refrigeration unit is concentrated on the two side walls of the shielding cover.

[0008] Furthermore, the expansion valve is located at the top of the cabinet door, and an air inlet slot extending through the bottom is provided in the cabinet door. The flexible telescopic tube is connected to the expansion valve, one end of the evaporator tube is connected to the expansion valve, and the other end of the evaporator tube extends out from the bottom of the cabinet door. The compressor is located on the outside of the cabinet, and both the evaporator tube and the compressor tube are connected to the compressor via pipes. During operation, the equipment in the distribution cabinet generates heat, and the blower unit delivers external air into the moisture-absorbing air duct. The airflow in the moisture-absorbing air duct enters the cabinet door through the air inlet slot, and then... The evaporator tubes are cooled by blowing low-temperature airflow into the cabinet to cool the equipment inside. The cooling airflow first flows into the gap between the inner layer plate and the shielding cover, and then flows out from the gap between the outer layer plate and the shielding cover. The dust curtain prevents dust from entering the cabinet, but the airflow in the cabinet can flow out of the cabinet through the dust curtain. The heat dissipation tubes are distributed in the gap between the outer layer plate and the shielding cover. Therefore, the cooling airflow cools the heat dissipation tubes while flowing out of the cabinet. The airflow also prevents dust from falling on the outside of the cabinet, thus maintaining the heat dissipation efficiency of the cabinet.

[0009] Furthermore, the dehumidifier has internal moisture-absorbing and dehumidifying air channels. The moisture-absorbing air channel is located above the dehumidifying air channel. Several silicone moisture-absorbing rollers are rotatably installed inside the dehumidifier. These silicone moisture-absorbing rollers are arranged in a stepped manner, with each silicone moisture-absorbing roller located between the moisture-absorbing and dehumidifying air channels. When the airflow flows in the moisture-absorbing air channel, it passes through the stepped silicone moisture-absorbing rollers. The windward side of the silicone moisture-absorbing rollers absorbs moisture from the airflow. After the multiple silicone moisture-absorbing rollers absorb moisture from the air, the airflow entering the cabinet is kept dry. The silicone moisture-absorbing rollers on the moisture-absorbing side become heavier, and the heavier side rolls downward under the action of gravity. The silicone moisture-absorbing rollers that have not absorbed moisture come into contact with the airflow.

[0010] Furthermore, the moisture-absorbing duct is connected to the top of the dehumidifier and to the air inlet duct. The top guide hood of the exhaust duct is connected to the interior of the exhaust duct. The exhaust duct is connected to the outside atmosphere through the through slots on both sides of the dehumidifier. The water-absorbing side of the silicone moisture-absorbing roller at the bottom enters the exhaust duct. Warm air drawn from inside the guide hood enters the exhaust duct, evaporating the water absorbed by the silicone moisture-absorbing roller and discharging it from both sides of the dehumidifier. The silicone moisture-absorbing roller rotates continuously, continuously dehumidifying the incoming air to achieve the effect of drying the air.

[0011] Furthermore, the air supply unit is installed on top of the air intake seat. The air supply unit includes a cross-flow air duct and a motor. The cross-flow air duct is connected to the motor shaft of the motor. The air intake seat has an air duct inside, which is connected to the moisture absorption trough. The motor drives the cross-flow air duct to rotate, and the airflow enters the moisture absorption trough through the air duct inside the air intake seat. The filter screen on the mesh cover filters the air to prevent dust from being sucked in by the cross-flow air duct.

[0012] Furthermore, the mesh cover is positioned above the air intake seat, and a filter screen is inclinedly installed on the top of the mesh cover. A reducer is installed on the air intake seat, and the reducer is positioned on the side of the cross-flow air duct away from the motor. The cross-flow air duct is connected to the input shaft of the reducer, and the output shaft of the reducer is equipped with a spiral embossed wheel. When the cross-flow air duct rotates, it drives the reducer to rotate, and the reducer drives the spiral embossed wheel to rotate at a low speed.

[0013] Furthermore, a small groove is provided on the rear side of the shielding cover, in which a slider is slidably installed. A striking rod is provided on the top of the slider, and a spring is provided between the bottom of the slider and the small groove. A pin is also provided on the side of the slider. The pin contacts a spiral embossed wheel. The threaded protrusion on the spiral embossed wheel pushes the pin downward, and the slider slides down along the small groove. The spring is compressed and accumulates elastic potential energy. As the spiral embossed wheel rotates, the pin is slowly pushed to the position where the threaded protrusion breaks. With the help of the elastic potential energy of the spring, the slider moves upward quickly, and the striking rod strikes the edge of the filter screen, causing the filter screen to vibrate. Dust is shaken off the filter screen and slides down the inclined surface of the filter screen, improving the air extraction efficiency of the blower unit.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. By setting up the refrigeration unit, low-temperature airflow is blown into the cabinet to cool the equipment in the distribution cabinet. Dust curtains are used to prevent dust from entering the cabinet, but the airflow in the cabinet can flow out of the cabinet through the dust curtains. The heat dissipation pipes are distributed in the gap between the outer plate and the shielding cover. Therefore, the cooling airflow cools the heat dissipation pipes while flowing out of the cabinet. At the same time, the airflow prevents dust from falling on the outside of the cabinet, thus maintaining the heat dissipation efficiency of the cabinet.

[0016] 2. The silicone moisture-absorbing roller absorbs moisture from the airflow, ensuring the airflow entering the cabinet is dry. The silicone moisture-absorbing roller on the water-absorbing side becomes heavier and rolls downwards into the dehumidification duct under the action of gravity. The warm air drawn from inside the guide hood evaporates the water absorbed by the silicone moisture-absorbing roller. The silicone moisture-absorbing roller rotates continuously, continuously dehumidifying the incoming air and achieving the effect of drying the air.

[0017] 3. While supplying air, the cross-flow fan duct drives the spiral embossed wheel to rotate at a low speed. The threaded protrusions on the spiral embossed wheel push the pin downwards, compressing the spring and accumulating elastic potential energy. The pin is slowly pushed to the position where the threaded protrusions break. With the help of the elastic potential energy of the spring, the slider moves upwards quickly, and the impact rod strikes the edge of the filter screen, causing the filter screen to vibrate. Dust is shaken off the filter screen and slides down the inclined surface of the filter screen, improving the air extraction efficiency of the fan unit. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the overall disassembly structure of the present invention. Figure 1 ;

[0020] Figure 3 This is a schematic diagram of the overall disassembly structure of the present invention. Figure 2 ;

[0021] Figure 4 This is a schematic diagram of the disassembly structure of the power distribution cabinet of the present invention;

[0022] Figure 5 For the present invention Figure 4 A magnified view of a portion of region A in the middle;

[0023] Figure 6 This is a schematic diagram of the disassembled structure of the base of the present invention;

[0024] Figure 7 This is a schematic diagram of the internal structure of the dehumidifier of the present invention;

[0025] Figure 8This is a schematic diagram of the air intake seat of the present invention.

[0026] Figure 9 This is a schematic diagram of the cooling airflow of the present invention.

[0027] In the diagram: 1. Cabinet body; 2. Cabinet door; 3. Base; 4. Shielding cover; 5. Heat dissipation pipe; 6. Compression pipe; 7. Flexible telescopic pipe; 8. Air guide cover; 9. Evaporator pipe; 10. Air inlet slot; 11. Small slide rail; 12. Slider; 13. Pin; 14. Impact rod; 15. Dehumidifier; 16. Air intake seat; 17. Wire mesh cover; 18. Filter screen; 19. Moisture absorption slot; 20. Moisture exhaust slot; 21. Silicone moisture absorption roller; 22. Cross-flow air duct; 23. Motor; 24. Reducer; 25. Spiral textured dial; 26. Spring; 27. Expansion valve; 28. Dust curtain. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example: Figures 1-9 As shown, the present invention provides a technical solution: a power distribution cabinet with electromagnetic interference protection function, comprising a cabinet body 1, a cabinet door 2, and a base 3. The cabinet door 2 is connected to the cabinet body 1 by hinges. The cabinet body 1 includes a shielding cover 4 and a guide cover 8. The base 3 includes a dehumidifier 15, an air intake seat 16, an air supply unit, and a mesh cover 17. The dehumidifier 15 is located at the bottom of the cabinet body 1, and the air intake seat 16, the air supply unit, and the mesh cover 17 are located at the rear of the cabinet body 1. A refrigeration unit is also installed in the cabinet body 1 and the cabinet door 2 to cool the power distribution cabinet. The guide cover 8 is composed of an inner layer plate and an outer layer plate. The shielding cover 4 is embedded between the inner layer plate and the outer layer plate, and a space is provided between the outer layer plate and the shielding cover 4. The unit includes a dust curtain 28 and a refrigeration unit comprising a heat dissipation pipe 5, a compression pipe 6, a flexible telescopic pipe 7, an evaporation pipe 9, an expansion valve 27, and a compressor. The heat dissipation pipe 5 is installed in the cabinet 1, and the evaporation pipe 9 is installed in the cabinet door 2. The refrigeration unit is filled with refrigerant. Under the action of the compressor, the refrigerant is sent out from the compressor's compression port and distributed through the compression pipe 6 to the heat dissipation pipes 5 on both sides of the shield 4. The refrigerant dissipates heat to the outside in the heat dissipation pipes 5 and collects in the flexible telescopic pipe 7. The refrigerant in the flexible telescopic pipe 7 enters the evaporation pipe 9 after passing through the expansion valve 27. The temperature of the evaporation pipe 9 decreases, and the refrigerant flows to the negative pressure port of the compressor, realizing the internal circulation of the pipes.

[0030] Compression pipe 6 is located at the bottom of shielding cover 4, and heat dissipation pipe 5 is located on both sides and top of shielding cover 4. Both ends of heat dissipation pipe 5 pass through guide cover 8 and are connected to compression pipe 6. One end of flexible telescopic pipe 7 is connected to heat dissipation pipe 5, and the other end of flexible telescopic pipe 7 passes through the top of guide cover 8 and is connected to cabinet door 2. Expansion valve 27 is located at the top of cabinet door 2. Air inlet slot 10 is opened in cabinet door 2, which runs through the bottom. Flexible telescopic pipe 7 is connected to expansion valve 27. One end of evaporation pipe 9 is connected to expansion valve 27, and the other end of evaporation pipe 9 passes through the bottom of cabinet door 2. Compressor (not shown in the figure) is located on the outside of cabinet body 1. Evaporation pipe 9 and compression pipe 6 are both connected to compressor through pipes. Since cabinet door 2 needs to be opened and closed, flexible telescopic pipe 7 is used to connect heat dissipation pipe 5 and evaporation pipe 9. Heat dissipation pipe 5 is mainly distributed on the left and right sides of shielding cover 4. Therefore, the heat emitted by the refrigeration unit is concentrated on the two side walls of the shield 4. The equipment in the distribution cabinet generates heat during operation. The blower unit sends outside air into the dehumidifying air duct 19. The airflow in the dehumidifying air duct 19 enters the cabinet door 2 from the air inlet duct 10. After being cooled by the evaporator pipe 9, the low-temperature airflow is blown into the cabinet 1 to cool the equipment in the distribution cabinet. The cooling airflow in the cabinet 1 first flows into the gap between the inner layer plate and the shield 4, and then flows out from the gap between the outer layer plate and the shield 4. The dust curtain 28 blocks dust from entering the cabinet 1, but the airflow in the cabinet 1 can flow out of the cabinet 1 through the dust curtain 28. The heat dissipation pipe 5 is distributed in the gap between the outer layer plate and the shield 4. Therefore, the cooling airflow cools the heat dissipation pipe 5 while flowing out of the cabinet 1. The airflow prevents dust from falling on the outside of the cabinet 1 while flowing out of the cabinet 1, thus maintaining the heat dissipation efficiency of the cabinet 1.

[0031] The dehumidifier 15 has an internal moisture-absorbing channel 19 and an exhaust channel 20. The moisture-absorbing channel 19 is located above the exhaust channel 20. Several silicone moisture-absorbing rollers 21 are rotatably installed inside the dehumidifier 15, arranged in a stepped manner. Each silicone moisture-absorbing roller 21 is located between the moisture-absorbing channel 19 and the exhaust channel 20. The moisture-absorbing channel 19 is connected to the top of the dehumidifier 15 and to the air inlet channel 10. The top guide hood 8 of the exhaust channel 20 is connected to the inside of the exhaust channel 20. The exhaust channel 20 is connected to the outside atmosphere through the through-slots on both sides of the dehumidifier 15. When the airflow flows in the moisture-absorbing channel 19, it passes over the stepped silicone moisture-absorbing rollers 21. The silicone moisture-absorbing roller 21 absorbs moisture from the airflow on its windward side. After multiple silicone moisture-absorbing rollers 21 absorb moisture from the air, the airflow entering the cabinet 1 is kept dry. The silicone moisture-absorbing roller 21 on the water-absorbing side becomes heavier and rolls downward under the action of gravity. The silicone moisture-absorbing roller 21 that has not absorbed water comes into contact with the airflow. The silicone moisture-absorbing roller 21 that has rolled to the bottom enters the exhaust air channel 20 on its water-absorbing side. The warm air drawn from inside the guide hood 8 enters the exhaust air channel 20 and evaporates the water absorbed by the silicone moisture-absorbing roller 21. The water is discharged from both sides of the dehumidifier 15. The silicone moisture-absorbing roller 21 rotates continuously to continuously dehumidify the incoming air, thus achieving the effect of drying the air.

[0032] The blower unit is located on top of the air intake seat 16. The blower unit includes a cross-flow duct 22 and a motor 23. The cross-flow duct 22 is connected to the motor shaft of the motor 23. An air duct is provided inside the air intake seat 16 and is connected to the moisture absorption duct 19. A mesh cover 17 is located above the air intake seat 16. A filter screen 18 is inclinedly installed on the top of the mesh cover 17. A reducer 24 is installed on the air intake seat 16. The reducer 24 is located on the side of the cross-flow duct 22 away from the motor 23. The cross-flow duct 22 is connected to the input shaft of the reducer 24. A spiral textured dial wheel 25 is provided on the output shaft of the reducer 24. A small slide groove 11 is provided on the rear side of the shield cover 4. A slider 12 is slidably installed in the small slide groove 11. A striker 14 is provided on the top of the slider 12. A spring 26 is provided between the bottom of the slider 12 and the small slide groove 11. A pin 13 is also provided on the side of the slider 12. The pin 13 contacts the spiral textured dial wheel 25.

[0033] Motor 23 drives the cross-flow fan duct 22 to rotate. Airflow enters the moisture absorption duct 19 through the air hole in the air intake seat 16. The filter screen 18 on the mesh cover 17 filters the air to prevent dust from being sucked into the cross-flow fan duct 22. As the cross-flow fan duct 22 rotates, it drives the reducer 24 to rotate. The reducer 24 drives the spiral embossed dial wheel 25 to rotate at low speed. The threaded protrusion on the spiral embossed dial wheel 25 pushes the pin 13 downward. The slider 12 slides downward along the small slide groove 11. The spring 26 is compressed and accumulates elastic potential energy. As the spiral embossed dial wheel 25 rotates, the pin 13 is slowly pushed to the position where the threaded protrusion breaks. With the help of the elastic potential energy of the spring 26, the slider 12 moves upward quickly. The impact rod 14 strikes the edge of the filter screen 18, causing the filter screen 18 to vibrate. The dust is shaken away from the filter screen 18 and slides down the inclined surface of the filter screen 18, improving the air intake efficiency of the blower unit.

[0034] The working principle of this invention is as follows: The refrigeration unit is filled with refrigerant. Under the action of the compressor, the refrigerant is sent out from the compression port of the compressor and diverted through the compression pipe 6 to the heat dissipation pipes 5 on both sides of the shield 4. The refrigerant dissipates heat to the outside in the heat dissipation pipes 5. The refrigerant collects in the flexible telescopic pipe 7. The refrigerant in the flexible telescopic pipe 7 enters the evaporator pipe 9 after passing through the expansion valve 27. The temperature of the evaporator pipe 9 decreases, and the refrigerant flows to the negative pressure port of the compressor, realizing the internal circulation of the pipeline.

[0035] Since cabinet door 2 needs to be opened and closed, a flexible telescopic tube 7 is used to connect the heat dissipation pipe 5 and the evaporation pipe 9. The heat dissipation pipe 5 is mainly distributed on the left and right sides of the shielding cover 4. Therefore, the heat dissipated by the refrigeration unit is concentrated on the two side walls of the shielding cover 4. The equipment in the distribution cabinet generates heat during operation. The air supply unit sends outside air into the moisture absorption duct 19. The airflow in the moisture absorption duct 19 enters the cabinet door 2 from the air inlet duct 10. After being cooled by the evaporation pipe 9, the low-temperature airflow is blown into the cabinet 1 to cool the equipment in the distribution cabinet. To cool down the cabinet, the cooling airflow in the cabinet 1 first flows into the gap between the inner layer plate and the shielding cover 4, and then flows out from the gap between the outer layer plate and the shielding cover 4. The dust curtain 28 blocks dust from entering the cabinet 1, but the airflow in the cabinet 1 can flow out of the cabinet 1 through the dust curtain 28. The heat dissipation pipes 5 are distributed in the gap between the outer layer plate and the shielding cover 4. Therefore, the cooling airflow cools the heat dissipation pipes 5 while flowing out of the cabinet 1. At the same time as the airflow flows out of the cabinet 1, it prevents dust from falling on the outside of the cabinet 1, thus maintaining the heat dissipation efficiency of the cabinet 1.

[0036] As the airflow flows through the desiccant 19, it passes over the stepped silicone desiccant rollers 21. The windward side of the silicone desiccant rollers 21 absorbs moisture from the airflow. After multiple silicone desiccant rollers 21 absorb moisture from the air, the airflow entering the cabinet 1 is kept dry. The silicone desiccant rollers 21 on the water-absorbing side become heavier and roll downwards under the influence of gravity. The silicone desiccant rollers 21 that have not absorbed water come into contact with the airflow. The silicone desiccant rollers 21 that have rolled to the bottom enter the desiccant 20 on the water-absorbing side. Warm air drawn from inside the guide hood 8 enters the desiccant 20 and evaporates the water absorbed by the silicone desiccant rollers 21. The water is discharged from both sides of the dehumidifier 15. The silicone desiccant rollers 21 rotate continuously, continuously dehumidifying the incoming air and achieving the effect of drying the air.

[0037] Motor 23 drives the cross-flow fan duct 22 to rotate. Airflow enters the moisture absorption duct 19 through the air hole in the air intake seat 16. The filter screen 18 on the mesh cover 17 filters the air to prevent dust from being sucked into the cross-flow fan duct 22. As the cross-flow fan duct 22 rotates, it drives the reducer 24 to rotate. The reducer 24 drives the spiral embossed dial wheel 25 to rotate at low speed. The threaded protrusion on the spiral embossed dial wheel 25 pushes the pin 13 downward. The slider 12 slides downward along the small slide groove 11. The spring 26 is compressed and accumulates elastic potential energy. As the spiral embossed dial wheel 25 rotates, the pin 13 is slowly pushed to the position where the threaded protrusion breaks. With the help of the elastic potential energy of the spring 26, the slider 12 moves upward quickly. The impact rod 14 strikes the edge of the filter screen 18, causing the filter screen 18 to vibrate. The dust is shaken away from the filter screen 18 and slides down the inclined surface of the filter screen 18, improving the air intake efficiency of the blower unit.

[0038] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A power distribution cabinet with electromagnetic interference suppression function, characterized in that: The cabinet includes a cabinet body (1), a cabinet door (2), and a base (3). The cabinet door (2) is connected to the cabinet body (1) by a hinge. The cabinet body (1) includes a shield (4) and a guide shroud (8). The base (3) includes a dehumidifier (15), an air intake seat (16), a blower unit, and a mesh cover (17). The dehumidifier (15) is located at the bottom of the cabinet body (1). The air intake seat (16), the blower unit, and the mesh cover (17) are located at the rear of the cabinet body (1). A refrigeration unit is also installed in the cabinet body (1) and the cabinet door (2). The refrigeration unit cools down the distribution cabinet. The air guide shroud (8) is composed of an inner plate and an outer plate. The shield (4) is embedded between the inner plate and the outer plate. A dust curtain (28) is provided between the outer plate and the shield (4). The refrigeration unit includes a heat dissipation pipe (5), a compression pipe (6), a flexible telescopic pipe (7), an evaporation pipe (9), an expansion valve (27), and a compressor. The heat dissipation pipe (5) is installed in the cabinet (1), and the evaporation pipe (9) is installed in the cabinet door (2). The dehumidifier (15) has a moisture absorption channel (19) and a moisture exhaust channel (20) inside. The moisture absorption channel (19) is located above the moisture exhaust channel (20). Several silicone moisture absorption rollers (21) are rotatably installed inside the dehumidifier (15). The silicone moisture absorption rollers (21) are arranged in a stepped manner, and each silicone moisture absorption roller (21) is located between the moisture absorption channel (19) and the moisture exhaust channel (20). The cabinet door (2) has an air inlet slot (10) that runs through the bottom. The moisture absorption slot (19) is connected to the top of the dehumidifier (15). The moisture absorption slot (19) is connected to the air inlet slot (10). The top guide hood (8) of the exhaust slot (20) is connected to the inside. The exhaust slot (20) is connected to the outside atmosphere through the through slots on both sides of the dehumidifier (15).

2. A power distribution cabinet with electromagnetic interference suppression function according to claim 1, characterized in that: The compression pipe (6) is located at the bottom of the shield (4), and the heat dissipation pipe (5) is located on both sides and the top of the shield (4). Both ends of the heat dissipation pipe (5) pass through the flow guide (8) and are connected to the compression pipe (6). One end of the flexible telescopic pipe (7) is connected to the heat dissipation pipe (5), and the other end of the flexible telescopic pipe (7) passes through the top of the flow guide (8) and is connected to the cabinet door (2).

3. A power distribution cabinet with electromagnetic interference suppression function according to claim 2, characterized in that: The expansion valve (27) is located on the upper part of the cabinet door (2). The flexible telescopic tube (7) is connected to the expansion valve (27). One end of the evaporator tube (9) is connected to the expansion valve (27). The other end of the evaporator tube (9) extends out from the bottom of the cabinet door (2). The compressor is located on the outside of the cabinet body (1). The evaporator tube (9) and the compression tube (6) are both connected to the compressor through pipes.

4. A power distribution cabinet with electromagnetic interference suppression function according to claim 1, characterized in that: The air supply unit is located on the top of the air supply seat (16). The air supply unit includes a cross-flow air duct (22) and a motor (23). The cross-flow air duct (22) is connected to the motor shaft of the motor (23). The air supply seat (16) has an air duct inside, and the air duct is connected to the moisture absorption trough (19).

5. A power distribution cabinet with electromagnetic interference suppression function according to claim 4, characterized in that: The mesh cover (17) is set above the air intake seat (16), and a filter screen (18) is inclinedly set on the top of the mesh cover (17). A reducer (24) is installed on the air intake seat (16). The reducer (24) is set on the side of the cross-flow duct (22) away from the motor (23). The cross-flow duct (22) is connected to the input shaft of the reducer (24). The output shaft of the reducer (24) is provided with a spiral textured dial (25).

6. A power distribution cabinet with electromagnetic interference suppression function according to claim 5, characterized in that: The shield (4) has a small groove (11) on its rear side, and a slider (12) is slidably installed in the small groove (11). A striker (14) is provided on the top of the slider (12), and a spring (26) is provided between the bottom of the slider (12) and the small groove (11). A pin (13) is also provided on the side of the slider (12), and the pin (13) contacts the spiral convex dial (25).

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