A heat dissipation system of an active power filter cabinet

Abstract

This invention relates to the field of active power filter cabinet technology, and proposes a heat dissipation system for an active power filter cabinet, including a cabinet body. A top air outlet is fixed in the middle of the top surface of the cabinet body, and an air guide frame is fixed in the middle of the top surface of the inner side of the cabinet body. The air guide frame is connected to the inner side of the top air outlet, and a rotating hole is provided in the middle of the top surface of the top air outlet. After the drive motor of this invention drives the cooling fan to rotate, the external cold airflow enters the cabinet body through the bottom air inlet frame for heat dissipation, and then enters the top air outlet through the air guide frame, and is discharged through multiple air outlet slots, carrying away the heat inside the cabinet body. A first filter screen is connected to the air guide frame through a first mounting frame, and a second filter screen is connected to the bottom air inlet frame through a second mounting frame, which can prevent dust from entering the cabinet body and protect the internal equipment from dust. The first and second mounting frames are easy to disassemble and assemble, facilitating the cleaning or replacement of the first and second filters and maintaining efficient heat dissipation capacity.

Description

Technical Field

[0001] This invention relates to the field of active power filter cabinet technology, specifically to a heat dissipation system for an active power filter cabinet. Background Technology

[0002] An active power filter is a dynamic power quality management device based on power electronics technology. It can detect harmonic currents, reactive currents, or unbalanced currents in the power grid in real time. Through an internal converter, it actively outputs a compensation current with the same amplitude but opposite phase to the aforementioned interference currents, accurately offsetting power quality problems in the power grid. It can be widely used in industrial loads, new energy grid connection, data centers, and other scenarios, effectively improving grid stability, protecting electrical equipment, and reducing energy consumption. Active power filters need to be installed inside an active power filter cabinet, which provides protection for the filter and ensures its safe operation.

[0003] Active power filter cabinets are typically used with the cabinet door closed, which prevents the heat generated by the active power filter inside from dissipating to the outside. To prevent overheating and damage to the active power filter, a heat dissipation device needs to be installed on the active power filter cabinet to help with ventilation and heat dissipation. At the same time, to prevent external dust from entering the active power filter cabinet through the heat dissipation channels and damaging the internal active power filter, a filter screen needs to be installed on the heat dissipation structure to isolate external dust. However, the filter screen is usually fixed to the heat dissipation structure, making it inconvenient to install and remove. After prolonged use, the filter screen is easily clogged with dust, leading to a decrease in heat dissipation efficiency and indirectly causing the active power filter to overheat and be damaged. Therefore, it is required that the filter screen can be quickly and easily installed and cleaned.

[0004] Therefore, a heat dissipation system for an active power filter cabinet that is easy to disassemble and clean is needed. Summary of the Invention

[0005] To address the aforementioned issues, this invention proposes a heat dissipation system for an active power filter cabinet. A first filter and a second filter are respectively fixed inside a first mounting frame and a second mounting frame. The first mounting frame and the second mounting frame are connected in a movable manner, allowing for easy disassembly. This facilitates the removal, cleaning, or direct replacement of the first and second filters, ensuring that the heat dissipation effect of the cabinet remains unaffected.

[0006] To achieve the above objectives, the present invention proposes the following specific solutions: A heat dissipation system for an active power filter cabinet includes a cabinet body, a top air outlet duct fixed in the middle of the top surface of the cabinet body, an air guide frame fixed in the middle of the top surface of the inner side of the cabinet body, the air guide frame communicating with the inner side of the top air outlet duct, a rotating hole provided in the middle of the top surface of the top air outlet duct, the rotating hole communicating with the inner side of the top air outlet duct, a drive motor fixed in the middle of the top surface of the top air outlet duct, a rotating shaft fixed in the middle of the bottom surface of the drive motor, the rotating shaft passing through the rotating hole, a cooling fan fixed at the lower end of the rotating shaft, the cooling fan being located on the inner side of the lower end of the top air outlet duct, and an air outlet groove provided on the outer wall of the upper end of the top air outlet duct, the air outlet groove communicating with the inner side of the top air outlet duct; The bottom surface of the air guide frame is symmetrically provided with insertion slots. Below the insertion slots is a first mounting frame. A first filter screen is fixed to the inner wall of the first mounting frame. An insertion plate is symmetrically fixed to the top surface of the first mounting frame. The upper end of the insertion plate is movably inserted into the inner side of the insertion slot. A limiting groove is provided on the upper side wall of the insertion plate. Hollow plates are symmetrically fixed to the lower outer wall of the air guide frame. The hollow plates communicate with the inner side of the insertion slots. A moving hole is provided in the middle of one outer wall of the hollow plate, communicating with the inner side of the hollow plate. A limiting groove is provided on the inner side of the hollow plate. The cabinet has a limiting plate, one end of which is movably inserted into the inner side of the limiting groove. A pull rod is fixed in the middle of one side wall of the limiting plate, and the pull rod passes through the moving hole. A bottom air inlet frame is symmetrically fixed on the outer wall of the lower end of the cabinet. The bottom air inlet frame is connected to the inner side of the cabinet. A connecting screw is symmetrically fixed on one side wall of the bottom air inlet frame. A second mounting frame is movably inserted into the outer side of the connecting screw. A second filter screen is fixed on the inner wall of the second mounting frame. A limiting threaded ring is threaded to one end of the connecting screw, and the limiting threaded ring is tightly fitted to the side wall of the second mounting frame.

[0007] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, the second mounting frame is provided with symmetrical connection holes on one side wall, the connection screw is movably inserted into the inside of the connection hole, the connection screw passes through the connection hole, and the connection hole and the connection screw are connected to facilitate the installation and disassembly of the second mounting frame.

[0008] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, a second sealing frame is fixed on the other side wall of the second mounting frame. The second sealing frame is tightly fitted with the bottom air inlet frame. A through hole is symmetrically provided on one side wall of the second sealing frame. The through hole communicates with the inner side of the connecting hole. The connecting screw passes through the through hole. The setting of the through hole ensures that the second sealing frame will not affect the normal use of the connecting screw and the connecting hole.

[0009] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, a first sealing frame is fixed on the top surface of the first mounting frame, the first sealing frame is tightly fitted with the air guide frame, the top surface of the first sealing frame is symmetrically provided with a receiving groove, the lower end of the plug plate is located inside the receiving groove, and the first sealing frame can seal the connection between the air guide frame and the first mounting frame.

[0010] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, a spring is fixed on one side wall of the limiting plate. The spring is located inside the hollow plate and is movably sleeved on the outside of the pull rod. One end of the spring is fixed on the inner wall of the hollow plate. The elastic force of the spring can push the limiting plate to move and insert into the limiting groove.

[0011] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, a fixing ring is fixedly sleeved on the outer wall of the drive motor, and a supporting bent column is symmetrically fixed on the outer wall of the fixing ring. The lower end of the supporting bent column is fixed on the top surface of the top air outlet, and the supporting bent column supports the fixing ring. The fixing ring can ensure the stability of the drive motor.

[0012] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, the inner wall of the cabinet is fixed with partitions, and there are three partitions. The top surface of the partitions is provided with ventilation slots. The partitions divide the inner part of the cabinet into different spaces for installing various equipment. The ventilation slots allow the airflow inside the cabinet to flow normally, thereby enhancing the heat dissipation effect.

[0013] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, a cabinet door is hinged to the outer wall of one side of the cabinet body, and four support legs are fixed to the bottom edge of the cabinet body. The cabinet door closes the cabinet body, and the support legs can support the cabinet and ensure the balance of the cabinet body.

[0014] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, multiple air outlet slots and ventilation slots are provided, which helps to enhance the heat dissipation effect.

[0015] As a preferred technical solution of the heat dissipation system of the active power filter cabinet of the present invention, both the first sealing frame and the second sealing frame are made of elastic rubber material. The elastic rubber material can deform under force, thereby enhancing the sealing effect.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The first filter screen of this invention is fixed to the inner wall of the first mounting frame. The first mounting frame is fixed by inserting a plug-in plate into the plug-in groove on the air guide frame and a spring pushing a limiting plate into the limiting groove on the plug-in plate. During disassembly, simply pull the pull rod to move the limiting plate away from the limiting groove, and the first mounting frame can be pulled out directly downwards to complete the disassembly of the first filter screen. During installation, the plug-in plate is aligned with the plug-in groove and inserted, and the limiting plate is locked into the limiting groove to complete the fixation. No tools are required throughout the process, and disassembly and assembly can be completed within 10 seconds. The second filter screen is fixed to the inner wall of the second mounting frame. The second mounting frame adopts a quick-release structure of "connecting screw + limiting threaded ring". The connecting screw passes through the connecting hole on the second mounting frame, and the limiting threaded ring limits and fixes the second mounting frame. During disassembly, simply unscrew the limiting threaded ring to pull out the second mounting frame horizontally. During installation, connect the connecting hole to the connecting screw and tighten the limiting threaded ring to fix it. In summary, the first and second filter screens are easy to disassemble and assemble, facilitating quick disassembly, cleaning, or replacement when the filter screen is clogged, improving efficiency and helping to maintain the cabinet's efficient heat dissipation capacity.

[0017] The cabinet of this invention forms a vertical directional heat dissipation channel through the bottom air inlet frame, the cabinet interior, the air guide frame, and the top air outlet duct. When the drive motor drives the cooling fan to rotate, a negative pressure is formed in the top air outlet duct. External cold air enters the cabinet from the bottom air inlet frame, passes through the ventilation slots on the three-layer partition, flows evenly through all the equipment in the cabinet, carries away the heat, enters the air guide frame, and finally exits through multiple air outlet slots in the top air outlet duct. This accelerates the airflow inside the cabinet, quickly removes heat, and efficiently dissipates heat.

[0018] The invention features a first sealing frame made of elastic rubber on the top surface of the first mounting frame. When the mounting frame is inserted into the air guide frame, the sealing frame is compressed and deformed, completely filling the gap between the air guide frame and the mounting frame, preventing airflow leakage from the gap, and preventing dust from entering the cabinet through the gap. The second mounting frame has a second sealing frame of the same material on its side. After installation, it fits tightly against the bottom air inlet frame, completely blocking the gap in the air inlet path. This ensures that all airflow passes through the filter screen and completely eliminates the possibility of dust entering from the side, protecting the safety of the internal equipment. Attached Figure Description

[0019] To better describe the technical solution of the present invention in detail, the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a three-dimensional view of the overall structure provided by the present invention; Figure 2 This is a three-dimensional sectional view of the present invention; Figure 3 This is a perspective view of the drive motor of the present invention; Figure 4 This is a perspective view of the first mounting frame of the present invention; Figure 5 This is a perspective view of the second mounting frame of the present invention; Figure 6 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 7 For the present invention Figure 2 Enlarged view of point B in the middle; Figure 8 For the present invention Figure 2 Enlarged diagram of point C in the middle.

[0021] In the diagram: 1. Cabinet body; 11. Support leg; 12. Cabinet door; 13. Top air outlet; 131. Air outlet slot; 132. Rotating hole; 14. Air guide frame; 141. Insertion slot; 142. Hollow board; 143. Moving hole; 15. Partition; 151. Ventilation slot; 16. Bottom air inlet frame; 161. Connecting screw; 162. Limiting threaded ring; 17. Limiting plate; 171. Pull rod; 172. Spring; 2. Drive motor; 21. Rotating shaft; 211. Cooling fan; 22. Fixing ring; 221. Supporting column; 3. First mounting frame; 31. First filter screen; 32. First sealing frame; 321. Receiving slot; 33. Insertion plate; 331. Limiting slot; 4. Second mounting frame; 41. Second filter screen; 42. Connecting hole; 43. Second sealing frame; 431. Through hole. Detailed Implementation

[0022] 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. Example 1

[0023] Please see Figure 1-8 As shown, the present invention provides the following technical solution: a heat dissipation system for an active power filter cabinet, including a cabinet body 1, with partitions 15 fixed to the inner wall of the cabinet body 1, which can be used to install active power filters and other equipment. There are three partitions 15, and ventilation slots 151 are provided on the top surface of the partitions 15 for bolt fixing and ventilation of the equipment. A cabinet door 12 is hinged to one side of the outer wall of the cabinet body 1 to close the cabinet body 1. Four support legs 11 are fixed to the bottom edge of the cabinet body 1 to support the cabinet body 1 and maintain the balance of the cabinet body 1. The cabinet body 1 can be made using existing active power filter cabinets. The improvement of this solution is only for the heat dissipation structure.

[0024] Reference Figure 1 , Figure 2 , Figure 3 and Figure 6 As shown, specifically, a top air outlet duct 13 is fixed in the middle of the top surface of the cabinet 1 to collect and guide airflow. A guide frame 14 is fixed in the middle of the top surface of the inner side of the cabinet 1 to guide airflow into the top air outlet duct 13. The guide frame 14 is connected to the inner side of the top air outlet duct 13. A rotating hole 132 is provided in the middle of the top surface of the top air outlet duct 13, so that the rotating shaft 21 has sufficient connection space. The rotating hole 132 is connected to the inner side of the top air outlet duct 13. A drive motor 2 is fixed in the middle of the top surface of the top air outlet duct 13. The drive motor 2 provides power for the rotation of the cooling fan 211. (The drive motor 2 is existing technology; its specific operation and principle can be found in existing small motors, so it is not elaborated here.) A rotating shaft 21 is fixed to the center of the bottom surface of the drive motor 2 to drive the cooling fan 211 to rotate. The rotating shaft 21 passes through the rotating hole 132, and the cooling fan 211 is fixed to the lower end of the rotating shaft 21. After the cooling fan 211 rotates, the hot air inside the cabinet 1 is discharged outwards. The cooling fan 211 is positioned inside the lower end of the top air outlet duct 13. A fixing ring 22 is fixedly fitted onto the outer wall of the drive motor 2 to reinforce it and make it sufficiently stable. Supporting columns 221 are symmetrically fixed to the outer wall of the fixing ring 22 to provide support. The lower end of the supporting columns 221 is fixed to the top surface of the top air outlet duct 13. An air outlet groove 131 is provided on the upper outer wall of the top air outlet duct 13 to discharge the hot air from inside the cabinet 1. The air outlet groove 131 is connected to the inner side of the top air outlet duct 13. Multiple air ducts 131 and ventilation ducts 151 are provided. In this solution, the drive motor 2 drives the rotating shaft 21 to drive the cooling fan 211 to rotate at high speed, forming a local negative pressure zone at the top air outlet duct 13. Outside cold air is forced to flow into the bottom of the cabinet 1 from the bottom air inlet frame 16. After passing through the heat-generating components, the hot air is drawn upward and concentrated and guided to the top air outlet duct 13 through the air guide frame 14. Finally, it is discharged at high speed through multiple air outlet ducts 131, forming a bottom-up, directional ventilation mode, which greatly improves the heat dissipation efficiency. Example 2

[0025] In another embodiment of this solution, refer to Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, specifically, the bottom surface of the air guide frame 14 is symmetrically provided with a plug-in groove 141 for connecting the plug-in plate 33. Below the plug-in groove 141, a first mounting frame 3 is provided for installing and fixing the first filter screen 31. The first filter screen 31 is fixed to the inner wall of the first mounting frame 3 to prevent external dust from falling into the cabinet 1 from above. The top surface of the first mounting frame 3 is symmetrically fixed with a plug-in plate 33 for installing and connecting the first mounting frame 3. The upper end of the plug-in plate 33 is movably inserted into the inner side of the plug-in groove 141. The upper side wall of the plug-in plate 33 is provided with a limiting groove 331 to limit the position of the plug-in plate 33. Hollow cores are symmetrically fixed to the lower outer wall of the air guide frame 14. Plate 142 is used to accommodate the movement of limiting plate 17. Hollow plate 142 is connected to the inner side of insertion groove 141. A moving hole 143 is provided in the middle of the outer wall of one side of hollow plate 142 for the pull rod 171 to move. The moving hole 143 is connected to the inner side of hollow plate 142. Limiting plate 17 is movably inserted into the inner side of hollow plate 142 to fix insertion plate 33. One end of limiting plate 17 is movably inserted into the inner side of limiting groove 331. A pull rod 171 is fixed in the middle of one side wall of limiting plate 17 for pulling limiting plate 17 to move. Pull rod 171 passes through moving hole 143. Spring 172 is fixed in one side wall of limiting plate 17 for limiting movement. The positioning plate 17 is inserted into the inner side of the limiting groove 331 to provide pushing force. The spring 172 is located inside the hollow plate 142 and is movably sleeved on the outer side of the pull rod 171. One end of the spring 172 is fixed to the inner wall of the hollow plate 142. The top surface of the first mounting frame 3 is fixed with a first sealing frame 32 for sealing the connection between the air guide frame 14 and the first mounting frame 3. The first sealing frame 32 fits tightly with the air guide frame 14. Both the first sealing frame 32 and the second sealing frame 43 are made of elastic rubber. The top surface of the first sealing frame 32 is symmetrically provided with a receiving groove 321, which is a reserved space for the setting of the plug-in plate 33. The lower end of the plug-in plate 33 is located in the receiving groove 321. Inside the trough 321, the first mounting frame 3 of this solution is quickly plugged into and unplugged into the slot 141 on the air guide frame 14 via the plug-in plate 33. The first mounting frame 3 is installed by inserting the limiting plate 17 into the limiting slot 331. When disassembling, simply pull the lever 171 to drive the limiting plate 17 out of the limiting slot 331, and the first mounting frame 3 can be pulled out downwards to complete the disassembly of the first filter screen 31, which is convenient for cleaning or replacing the first filter screen 31. The first sealing frame 32 is fixed to the top surface of the first mounting frame 3 and fits tightly with the air guide frame 14, which prevents dust from entering the cabinet 1 and protects the safety of the internal equipment. Example 3

[0026] In another embodiment of this solution, refer to Figure 1 , Figure 2 , Figure 5 and Figure 8As shown, specifically, a bottom air inlet frame 16 is symmetrically fixed to the lower outer wall of the cabinet 1 for introducing external cold airflow. The bottom air inlet frame 16 is connected to the inner side of the cabinet 1. A connecting screw 161 is symmetrically fixed to one side wall of the bottom air inlet frame 16 for supporting the second mounting frame 4. The second mounting frame 4 is movably inserted into the outside of the connecting screw 161 for installing the second filter screen 41. A connecting hole 42 is symmetrically provided on one side wall of the second mounting frame 4, allowing the second mounting frame 4 to be movably connected to the outside of the connecting screw 161. The connecting screw 161 is movably inserted into the inside of the connecting hole 42, and the connecting screw 161 passes through the connecting hole 42. A second sealing frame 43 is fixed to the other side wall of the second mounting frame 4 to seal the connection between the bottom air inlet frame 16 and the second mounting frame 4. The second sealing frame 43 fits tightly with the bottom air inlet frame 16. A through hole 431 is symmetrically provided on one side wall of the second sealing frame 43 for inserting the connecting screw 161. A channel is provided inside the connecting hole 42, and the through hole 431 communicates with the inside of the connecting hole 42. The connecting screw 161 passes through the through hole 431. The second filter 41 is fixed to the inner wall of the second mounting frame 4 to prevent dust from entering the cabinet 1 through the bottom air inlet frame 16. One end of the connecting screw 161 is threaded with a limiting threaded ring 162, which can fix the second mounting frame 4. The limiting threaded ring 162 fits tightly with the side wall of the second mounting frame 4. In this scheme, after the second mounting frame 4 passes through its connecting hole 42 with the connecting screw 161, it is tightened and fixed with the limiting threaded ring 162 to form a reliable axial clamping force, so that the second sealing frame 43 can fit tightly with the bottom air inlet frame 16. The second filter 41 and the second sealing frame 43 prevent dust from entering the cabinet 1 and protect the safety of the internal equipment. After unscrewing the limiting threaded ring 162, the second mounting frame 4 can be disassembled for easy cleaning or replacement of the second filter 41.

[0027] The working principle and usage process of this invention: When in use, install the core equipment such as the active power filter at the corresponding position on the three-layer partition 15 and fix it firmly with bolts, leaving a certain ventilation gap between the equipment; align the plug plate 33 of the first mounting frame 3 with the plug slot 141 of the air guide frame 14 and insert it. A "click" sound indicates that the limiting plate 17 is inserted into the limiting slot 331 under the action of the spring 172 (one end of the limiting plate 17 has a triangular structure, and the plug plate 33 can push the limiting plate 17 to compress the spring 172 when inserted into the plug slot 141), thus fixing the first mounting frame 3. Press the top surface of the first mounting frame 3 to confirm that there is no shaking. At this time, the first sealing frame 32 has been squeezed to form a seal. Insert the second mounting frame 4 through the connecting hole 42 onto the connecting screw 161 of the bottom air inlet frame 16, so that the second sealing frame 43 fits tightly with the bottom air inlet frame 16. Tighten the limiting thread ring 162 and shake the second mounting frame 4 by hand to confirm that there is no looseness. When the heat dissipation is working, the drive motor 2 is started. The drive motor 2 drives the cooling fan 211 to rotate through the rotating shaft 21, so that a negative pressure is formed inside the top air outlet duct 13. After the external cold air is filtered by the second filter screen 41, it enters the cabinet 1 through the bottom air inlet frame 16, flows through the ventilation slot 151 on the dissipation partition 15, enters the air guide frame 14 through the first filter screen 31, and is discharged through the air outlet slot 131 on the outer wall of the top air outlet duct 13, thus dissipating heat for the equipment inside the cabinet 1. When disassembling the first filter screen 31 and the second filter screen 41, pull the pull rods 171 on both sides of the air guide frame 14 to pull the limiting plate 17 out of the limiting groove 331, pull the first mounting frame 3 downwards to disassemble the first filter screen 31, unscrew the limiting threaded ring 162, pull the second mounting frame 4 horizontally to separate the connecting screw 161 from the connecting hole 42, and then disassemble the second filter screen 41. This allows the first filter screen 31 and the second filter screen 41 to be cleaned or replaced.

[0028] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A heat dissipation system of an active power filter cabinet, comprising a cabinet body (1), characterized in that: A top air outlet duct (13) is fixed in the middle of the top surface of the cabinet (1). A guide frame (14) is fixed in the middle of the top surface of the inner side of the cabinet (1). The guide frame (14) is connected to the inner side of the top air outlet duct (13). A rotating hole (132) is provided in the middle of the top surface of the top air outlet duct (13). The rotating hole (132) is connected to the inner side of the top air outlet duct (13). A drive motor (2) is fixed in the middle of the top surface of the top air outlet duct (13). A rotating shaft (21) is fixed in the middle of the bottom surface of the drive motor (2). The rotating shaft (21) passes through the rotating hole (132). A cooling fan (211) is fixed at the lower end of the rotating shaft (21). The cooling fan (211) is located on the inner side of the lower end of the top air outlet duct (13). An air outlet groove (131) is provided on the outer wall of the upper end of the top air outlet duct (13). The air outlet groove (131) is connected to the inner side of the top air outlet duct (13). The bottom surface of the air guide frame (14) is symmetrically provided with a plug-in groove (141). Below the plug-in groove (141) is a first mounting frame (3). The inner wall of the first mounting frame (3) is fixed with a first filter screen (31). The top surface of the first mounting frame (3) is symmetrically fixed with a plug-in plate (33). The upper end of the plug-in plate (33) is movably inserted into the inner side of the plug-in groove (141). The upper side wall of the plug-in plate (33) is provided with a limiting groove (331). The lower outer wall of the air guide frame (14) is symmetrically fixed with a hollow plate (142). The hollow plate (142) is connected to the inner side of the plug-in groove (141). The middle of one side outer wall of the hollow plate (142) is provided with a moving hole (143). The moving hole (143) is connected to the inner side of the hollow plate (142). The inner side of the hollow plate (142) is movably inserted. A limiting plate (17) is provided, one end of which is movably inserted into the inner side of the limiting groove (331). A pull rod (171) is fixed in the middle of one side wall of the limiting plate (17). The pull rod (171) passes through the moving hole (143). A bottom air inlet frame (16) is symmetrically fixed on the outer wall of the lower end of the cabinet (1). The bottom air inlet frame (16) is connected to the inner side of the cabinet (1). A connecting screw (161) is symmetrically fixed on one side wall of the bottom air inlet frame (16). A second mounting frame (4) is movably inserted into the outer side of the connecting screw (161). A second filter screen (41) is fixed on the inner wall of the second mounting frame (4). A limiting threaded ring (162) is threaded to one end of the connecting screw (161). The limiting threaded ring (162) is tightly fitted to the side wall of the second mounting frame (4).

2. The heat dissipation system of an active power filter cabinet according to claim 1, characterized in that: The second mounting frame (4) has symmetrically provided connecting holes (42) on one side wall. The connecting screw (161) is movably inserted into the inside of the connecting hole (42) and the connecting screw (161) passes through the connecting hole (42).

3. The heat dissipation system of an active power filter cabinet according to claim 2, characterized in that: The second mounting frame (4) has a second sealing frame (43) fixed on the other side wall. The second sealing frame (43) is tightly fitted with the bottom air inlet frame (16). The second sealing frame (43) has a through hole (431) symmetrically provided on one side wall. The through hole (431) is connected to the inner side of the connecting hole (42). The connecting screw (161) passes through the through hole (431).

4. The heat dissipation system of an active power filter cabinet according to claim 3, characterized in that: The first mounting frame (3) has a first sealing frame (32) fixed on its top surface. The first sealing frame (32) is in close contact with the air guide frame (14). The top surface of the first sealing frame (32) is symmetrically provided with a receiving groove (321). The lower end of the plug plate (33) is located inside the receiving groove (321).

5. The heat dissipation system of an active power filter cabinet according to claim 4, characterized in that: A spring (172) is fixed to one side wall of the limiting plate (17). The spring (172) is located inside the hollow plate (142). The spring (172) is movably sleeved on the outside of the pull rod (171). One end of the spring (172) is fixed on the inner wall of the hollow plate (142).

6. The heat dissipation system of an active power filter cabinet according to claim 5, characterized in that: The drive motor (2) has a fixed ring (22) fixedly sleeved on its outer wall. The fixed ring (22) has a support column (221) symmetrically fixed on its outer wall. The lower end of the support column (221) is fixed on the top surface of the top air outlet (13).

7. The heat dissipation system of an active power filter cabinet according to claim 6, characterized in that: The inner wall of the cabinet (1) is fixed with a partition (15), and there are three partitions (15). The top surface of the partition (15) is provided with a ventilation groove (151).

8. The heat dissipation system of an active power filter cabinet according to claim 7, characterized in that: A cabinet door (12) is hinged to one side of the outer wall of the cabinet (1), and four support legs (11) are fixed to the bottom edge of the cabinet (1).

9. The heat dissipation system of an active power filter cabinet according to claim 8, characterized in that: Multiple air outlet slots (131) and ventilation slots (151) are provided.

10. The heat dissipation system of an active power filter cabinet according to claim 9, characterized in that: Both the first sealing frame (32) and the second sealing frame (43) are made of elastic rubber.

Images