Dust removal filter unit and heat dissipation electrical box

Abstract

The application provides a dust removal filtering unit and a heat dissipation electrical box, and relates to the field of heat dissipation electrical boxes.The dust removal component comprises a dust removal cylinder, and the dust removal cylinder adopts a stainless steel folding filter core;the cleaning component comprises a mounting seat, the mounting seat is arranged at one end of the dust removal cylinder, a driving ring is rotatably arranged in the mounting seat, a driving module is connected to the driving ring, the driving module is connected with the mounting seat, and at least two brush strips are arranged on the end face of the driving ring close to the dust removal cylinder;the ventilation component comprises a fan, the air inlet of the fan is in communication with the air outlet pipe of the dust removal cylinder, the air outlet of the fan is provided with a dust removal box, and the air inlet of the fan is provided with an air speed meter.The application can clean the filtering component on line, and the electrical equipment in the box does not need to be stopped.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation electrical boxes, and more particularly to a dust removal and filtration unit and a heat dissipation electrical box. Background Technology

[0002] Dust entering the heat dissipation electrical box can cause short circuits in the equipment. Therefore, heat dissipation electrical boxes generally have good dust prevention effects. This is achieved by adding sealing materials to the edges of the box door or sealing the cable inlets and outlets on the box. However, if the box is too tightly sealed, it will lead to poor heat dissipation, causing the temperature inside the box to rise and affecting the normal operation of the equipment inside.

[0003] In the prior art, Chinese invention patent application publication number CN119070151A discloses a dustproof box for electrical equipment with high heat dissipation, including a cylindrical dustproof box body. A base is provided at the bottom of the dustproof box body, and a cooling component is provided between the base and the dustproof box body. A filter screen is fixed between the dustproof box body and the base. The bottom of the dustproof box body has a hollow structure design. A second filter screen is fixed at the top of the dustproof box body, and a motor is fixed at the middle of the upper end face of the second filter screen. A rotating rod is rotatably connected inside the dustproof box body, and the bottom of the rotating rod is drivenly connected to the cooling component. The top of the rotating rod is fixedly connected to the output shaft of the motor. A support plate is fixed at equal intervals inside the dustproof box body, and a rotating hole is opened in the middle of the support plate. The transmission rod extends downward from the rotating hole. The electrical equipment body is fixed at equal intervals in a ring on the upper end face of the support plate. This technical solution, through the setting of filter screen one and filter screen two, can achieve multi-stage filtration of the air entering the dustproof box body, and reduce the probability of air dust entering the dustproof box body, thereby achieving the effect of dust protection for the electrical equipment body placed inside.

[0004] When using the above technical solution, if it is necessary to clean filter screen one and filter screen two, filter screen one and filter screen two need to be removed from the dust box, cleaned, and then reinstalled. During this stage, the dust box of the electrical equipment cannot dissipate heat and remove dust, requiring the electrical equipment to be shut down, which affects the normal operation of the electrical equipment. Summary of the Invention

[0005] To address the technical problem in the prior art where the electrical box cannot clean the filter components online, thus affecting the normal operation of electrical equipment, the present invention provides a dust removal and filtration unit and a heat dissipation electrical box that can clean the filter components online without requiring the electrical equipment inside the box to be shut down.

[0006] In a first aspect, the present invention provides a dust removal and filtration unit to solve the above-mentioned technical problems, including a filter cartridge with an air inlet groove, and further including: a dust removal assembly including a dust removal cartridge made of stainless steel pleated filter element; and a cleaning assembly including a mounting base disposed at the end of the filter cartridge, a drive ring rotatably disposed within the mounting base, a drive module connected to the drive ring, the drive module being connected to the mounting base, and a [missing information - likely a feature or design feature] disposed on the end face of the drive ring near the dust removal cartridge. At least two brush strips are provided, which are arranged parallel to the dust collector and can extend into the tooth gaps of the dust collector; a ventilation assembly is provided, which includes a fan, the fan inlet is provided with an inlet tee pipe, the inlet tee pipe includes an inlet branch one and an inlet branch two, the inlet branch one is provided with an inlet switching valve, the inlet branch one is connected to the dust discharge hole of the filter cartridge, the inlet branch two is connected to the air outlet pipe of the dust collector, the air outlet of the fan is provided with a dust collection box, and the air inlet of the fan is provided with an anemometer.

[0007] This invention enables dust removal and cleaning of the dust collector without disassembly by setting up cleaning and ventilation components, without the need to disassemble the dust collector or shut down related equipment.

[0008] Furthermore, the drive module includes a drive motor, which is disposed outside the mounting base. The drive motor is connected to a transmission shaft, and a drive gear is disposed on the transmission shaft. The drive gear meshes with a driven gear, and the driven gear is rotatably disposed inside the mounting base. The driven gear meshes with a gear ring, which is disposed on the end face of the drive ring away from the dust collector.

[0009] Furthermore, there are two driven gears symmetrically arranged on both sides of the driving gear, and both driven gears mesh with the gear ring.

[0010] This invention, by symmetrically arranging two driven gears, ensures that the drive ring is subjected to uniform force, preventing lateral deviation and affecting the contact area between the brush strip and the dust collection cylinder, thus guaranteeing the cleaning effect.

[0011] Furthermore, a switching plate is rotatably provided at the end of the transmission shaft. The switching plate is connected to the inner wall of the drive ring and is located between the gear ring and the dust collector. A switching module is provided on the switching plate and is connected to the drive gear. The switching module can drive the drive gear to reciprocate along the transmission shaft and connect and disconnect from the switching plate. When the drive gear is connected to the switching plate, the drive gear no longer meshes with the driven gear.

[0012] This invention, through a switching plate and a switching module, enables the drive ring to rotate in the opposite direction under the direct action of the drive gear, thereby cleaning both sides of the toothed protrusions of the dust collector cylinder and improving the cleaning effect.

[0013] Furthermore, the switching module includes an electromagnet, an armature, and a return spring. The electromagnet is disposed on the switching plate, the armature is disposed on the end face of the drive gear near the switching plate, and the return spring is disposed on the transmission shaft. One end of the return spring is connected to the switching plate, and the other end of the return spring can abut against the drive gear.

[0014] Furthermore, the air outlet of the fan is provided with an air outlet tee pipe, which includes an air outlet branch one and an air outlet branch two. An air outlet switching valve is provided on the air outlet branch one and the air outlet branch two respectively. The air outlet branch two is connected to the dust collection box, and the air outlet branch one is used to connect to the box where the electrical equipment is located.

[0015] This invention, by setting an exhaust tee and an exhaust switching valve, can close the branch line and prevent it from connecting to the housing when cleaning the dust collector, thus avoiding the dust from entering the housing.

[0016] Secondly, the present invention also provides a heat dissipation electrical box, including a box body for housing electrical equipment, and further comprising:

[0017] As described above, in the dust removal and filtration unit, the filter cartridge is located on the upper part of the housing, the air outlet branch is connected to the housing, the housing is provided with an air outlet grille, and the dust collection box is located outside the filter cartridge.

[0018] Furthermore, the fan is a variable frequency blower, and a temperature sensor is installed inside the housing.

[0019] This invention uses a variable frequency blower to provide appropriate airflow for heat dissipation based on the temperature inside the housing, avoiding excessive airflow that would cause frequent dust removal and cleaning of the dust collector and energy loss.

[0020] Furthermore, a filter screen is provided on the housing, and the filter screen is arranged opposite to the air outlet grille.

[0021] This invention prevents dust from entering the housing through the air outlet grille by setting up a filter screen.

[0022] Furthermore, the outer surface of the housing is provided with a mounting groove, and the filter screen is provided with a mounting frame, which can move within the mounting groove.

[0023] As can be seen from the above technical solutions, the present invention has the following advantages:

[0024] This invention provides a dust removal and filtration unit and a heat dissipation electrical box. By incorporating cleaning and ventilation components, dust removal and cleaning of the dust collector cylinder can be performed without disassembly, eliminating the need to disassemble the dust collector cylinder or shut down related equipment. A switching plate and switching module drive the drive ring to rotate in the opposite direction under the direct action of the active gear, enabling cleaning of both sides of the toothed protrusions on the dust collector cylinder, improving cleaning efficiency. The addition of an exhaust tee and exhaust switching valve allows for the closure of one branch during dust collector cylinder cleaning, preventing dust from entering the housing. The use of a variable frequency blower provides appropriate airflow based on the internal temperature of the housing for heat dissipation, avoiding excessive airflow that would lead to frequent dust removal and energy loss. A filter screen prevents dust from entering the housing through the exhaust grille. Attached Figure Description

[0025] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of a specific embodiment of the present invention.

[0027] Figure 2 This is a schematic diagram of the assembly structure of the brush strip and the dust collector in a specific embodiment of the present invention.

[0028] Figure 3 This is a schematic diagram of the cleaning component in a specific embodiment of the present invention.

[0029] Figure 4 This is a structural schematic diagram of a second specific embodiment of the present invention.

[0030] Figure 5 This is a partial structural diagram of the box in the second specific embodiment of the present invention.

[0031] In the diagram, 1. Drive motor; 2. Mounting base; 3. Filter cartridge; 4. Air inlet slot; 5. Air inlet branch one; 6. Air inlet branch two; 7. Fan; 8. Air outlet branch one; 9. Dust collector box; 10. Air outlet branch two; 11. Mounting plate; 12. Support ring; 13. Brush strip; 14. Dust collector cylinder; 15. Flange; 16. Drive ring; 17. Gear ring; 18. Driven gear; 19. Dust discharge hole; 20. Drive shaft; 21. Limiting boss; 22. Armature; 23. Return spring; 24. Electromagnet; 25. Switching plate; 27. Air inlet tee pipe; 28. Air outlet tee pipe; 29. ​​Housing; 30. Filter screen; 31. Air outlet grille; 32. Clip; 33. Air outlet switching valve; 34. Air inlet switching valve; 35. Drive gear. Detailed Implementation

[0032] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent. Specific Implementation Method 1

[0034] like Figures 1 to 3As shown, this specific embodiment provides a dust removal and filtration unit, including a filter cartridge 3, a dust removal component, a cleaning component, and a ventilation component. The filter cartridge 3 is provided with air inlet grooves 4, and multiple air inlet grooves 4 are evenly distributed on the filter cartridge 3. The dust removal component includes a dust removal cartridge 14. To enhance the filtration area, the dust removal cartridge 14 uses a stainless steel pleated filter element, which has multiple tooth-like structures. The cleaning component includes a mounting base 2, which is detachably mounted on one end of the dust removal cartridge 14 by bolts. A drive ring 16 is rotatably mounted inside the mounting base 2. Specifically, an annular groove is provided on the inner wall of the mounting base 2, and the flange 15 of the drive ring 16 is driven by a shaft. The drive ring 16 is rotatably mounted in the annular groove. A drive module is connected to the drive ring 16, which is connected to the mounting base 2. The drive module can drive the drive ring 16 to rotate. At least two brush strips 13 are provided on the end face of the drive ring 16 near the dust collector 14. The brush strips 13 are arranged parallel to the dust collector 14. In this specific embodiment, the diameter of the drive ring 16 is larger than that of the dust collector 14. The brush strips 13 can extend from outside the dust collector 14 into the tooth gaps of the dust collector 14 for cleaning. The brush strips 13 can rotate around the dust collector 14 with the drive ring 16, performing comprehensive cleaning and dust removal of the dust collector 14. The other end of the filter cylinder 3 is further secured by bolts. A mounting plate 11 is detachably provided, and mounting holes are provided on the mounting plate 11. The mounting holes are stepped holes. The air outlet pipe of the dust collector 14 extends into the small hole of the mounting hole to support the installation. A support ring 12 is rotatably provided in the large hole of the mounting hole through a bearing. The other end of the brush strip 13 is connected to the end face of the support ring 12 by bolts. The ventilation assembly includes a fan 7. The air inlet of the fan 7 is provided with an air inlet tee pipe 27. The air inlet tee pipe 27 includes an air inlet branch 5 and an air inlet branch 6. An air inlet switching valve 34 is provided on the air inlet branch 5. The air inlet branch 5 is connected to the dust discharge hole 19 of the filter cartridge 3 (the dust discharge hole 19 is horizontally set on the mounting plate 11). The air inlet switching valve 34 is closed to prevent air from entering the fan 7 through the dust discharge hole 19. The second air inlet branch 6 is connected to the air outlet pipe of the dust collector 14. The air outlet of the fan 7 is equipped with a dust collection box 9, and the air inlet of the fan 7 is equipped with an anemometer. When the wind speed detected by the anemometer is less than the set threshold, it is determined that the dust collector 14 needs to be cleaned. At this time, the drive module drives the drive ring 16 to rotate, and the brush strip 13 surrounds the dust collector 14 to clean and remove dust. The dust adhering to the dust collector 14 is peeled off from the dust collector 14 and enters the filter cylinder 3 and the dust collector 14. Under the action of the fan 7, the air containing dust is drawn to the dust collection box 9 for dust removal and then discharged.

[0035] This specific embodiment, by setting up cleaning components and ventilation components, can achieve dust removal and cleaning of the dust collector 14 without disassembling the dust collector 14. The method of using brush strips 13 is more effective than the vibration dust removal method in the prior art. In addition, the fan 7 can suck up the dust that falls into the filter cartridge 3 and enters the dust collector 14 after cleaning, so as to prevent the dust after cleaning from adhering to the dust collector 14 again and reduce the cleaning frequency.

[0036] like Figure 3 As shown, to ensure that the brush strip 13 stably surrounds the dust collector 14 for cleaning and dust removal, in this specific embodiment, the drive module includes a drive motor 1. The drive motor 1 is disposed outside the mounting base 2, and the motor shaft of the drive motor 1 extends into the mounting base 2. The motor shaft of the drive motor 1 is connected to a transmission shaft 20 via a coupling. A drive gear 35 is disposed on the transmission shaft 20, and the transmission shaft 20 and the drive gear 35 are connected by a spline. A limit boss 21 is also provided on the transmission shaft 20 to prevent the drive gear 35 from moving towards the mounting base 2. The drive gear 35 meshes with a driven gear 18, which is rotatably disposed inside the mounting base 2 via a support shaft and bearings. The driven gear 18 meshes with a gear ring 17, which is an internal gear ring 17, and the gear ring 17 is integrated with the drive ring 16. In this structure, the gear ring 17 is disposed on the end face of the drive ring 16 away from the dust collection cylinder 14. In this specific embodiment, the gear ring 17 and the drive ring 16 are an integrated structure. When the drive motor 1 is working, it drives the drive gear 35 to rotate, thereby driving the gear ring 17 to rotate through the driven gear 18. The gear ring 17 drives the drive ring 16 to rotate around its own axis, and the brush strip 13 rotates around the dust collection cylinder 14. Furthermore, in order to prevent the drive ring 16 from being biased to one side of the mounting base 2 under the action of a single driven gear 18, in this specific embodiment, there are two driven gears 18, which are symmetrically arranged on both sides of the drive gear 35, and both driven gears 18 mesh with the drive gear 35. To ensure a better cleaning effect, the brush strip 13 is made of nylon, which has high wear resistance and a long service life.

[0037] Because the dust collector cylinder 14 has many tooth gaps, it is necessary to clean both sides of the tooth gaps. If the drive ring 16 rotates in only one direction, the brush strip 13 will have less contact with the other side, affecting the cleaning effect. Therefore, the drive ring 16 needs to rotate in both directions. At this time, the drive motor 1 can be controlled to rotate in both directions. In this specific embodiment, such as Figure 3As shown, to reduce manufacturing costs and extend the service life of the drive motor 1, a related mechanical structure is used to change the direction of rotation of the drive ring 16. Specifically, a switching plate 25 is rotatably mounted on the end of the transmission shaft 20 via a bearing. The switching plate 25 is connected to the inner wall of the drive ring 16 via a connecting plate. The switching plate 25 and the drive ring 16 are coaxially arranged. The switching plate 25 is located between the gear ring 17 and the dust collector 14. A switching module is provided on the switching plate 25. The switching module is connected to the drive gear 35. The switching module can drive the drive gear 35 to reciprocate along the transmission shaft 20 and connect and disconnect from the switching plate 25. When the drive gear 35 is connected to the switching plate 25, the drive gear 35 no longer meshes with the driven gear 18. Through the switching module, the power transmission route can be changed, so that the power is directly transmitted from the drive gear 35 to the drive ring 16 without passing through the gear ring 17. Specifically, the switching module includes an electromagnet 24 and a coupling. An electromagnet 24 is mounted on a switching plate 25, and an armature 22 is mounted on the end face of the drive gear 35 near the switching plate 25. The return spring 23 is mounted on a transmission shaft 20, with one end connected to the switching plate 25 and the other end able to abut against the drive gear 35. In this specific embodiment, the core of the electromagnet 24 is annular. A mounting groove is coaxially provided on the switching plate 25, and the electromagnet 24 is mounted in the mounting groove. Both the electromagnet 24 and the armature 22 are annular structures. The armature 22 is mounted in the mounting groove on the end face of the drive gear 35 and protrudes a certain distance. When the electromagnet 24 is energized, the armature 22 is attracted by the electromagnet 24, causing the drive gear 35 to move closer to the switching plate 25 until the armature 22 is attracted to the electromagnet 24. At this time, the return spring 23 is compressed. When the electromagnet 24 is de-energized, the return spring 23 extends, driving the drive gear 35 away from the switching plate 25.

[0038] like Figure 1 As shown, to prevent air drawn out by the fan 7 from entering the housing 29 containing the electrical equipment during cleaning, in this specific embodiment, the air outlet of the fan 7 is provided with an air outlet tee pipe 28. The air outlet tee pipe 28 includes an air outlet branch 8 and an air outlet branch 10. An air outlet switching valve 33 is provided on the air outlet branch 8 and the air outlet branch 10 respectively. The air outlet branch 10 is connected to the dust collection box 9, and the air outlet branch 8 is used to connect to the housing 29 where the electrical equipment is located. By cutting off the connection path between the air outlet branch 8 and the housing 29 through the air outlet switching valve 33 on the air outlet branch 8, the dust from cleaning can be prevented from entering the housing 29.

[0039] In this specific embodiment, the dust collector 9 is equipped with multi-layer filter plates and an air outlet, which can prevent dust from being directly emitted and causing environmental pollution. The dust collector 9 adopts a fresh air filter box of model GLX-100, which is a commercially available product and belongs to existing technology. Its structure and working principle will not be described in detail.

[0040] It is understood that in this specific embodiment, the drive motor 1, anemometer, fan 7, air outlet switching valve 33, air inlet switching valve 34, and electromagnet 24 are all electrically connected to the control module and automatically perform dust removal and cleaning according to the blockage situation; the drive motor 1 refers to an electric reducer, which operates at a relatively slow speed of 30r / min to 40r / min to ensure the cleaning effect.

[0041] In this specific embodiment, the stainless steel pleated filter element is a fixed value, and its tooth gap width is configured according to the width of the brush strip 13.

[0042] The working process of this dust removal and filtration unit is as follows:

[0043] When the controller determines that cleaning is needed based on the wind speed monitored by the anemometer, the drive motor 1 operates. Simultaneously, the outlet switching valve 33 on outlet branch 1 8 closes, the outlet switching valve 33 on outlet branch 2 10 opens, and the inlet switching valve 34 on inlet branch 1 5 opens. The fan 7 operates at the set cleaning speed, driving the drive gear 35 to rotate. The drive gear 35 drives the gear ring 17 to rotate, which in turn drives the brush strip 13 to rotate around the dust collector 14 for cleaning. The brush strip 13 extends into the tooth gaps, and through friction and vibration, it peels off the dust attached to the dust collector 14 and disperses it in the space between the dust collector 14 and the filter cylinder 3, as well as inside the dust collector 14. Under the action of the fan 7, the peeled dust is sent to the dust collection box 9 for filtration and then discharged. After gear 35 rotates to a set angular displacement s1, electromagnet 24 is energized, attracting armature 22 to approach switching plate 25 until the two are attracted. At this time, drive gear 35 no longer meshes with driven gear 18, and drive gear 35 directly drives switching plate 25 to rotate, thereby realizing reverse rotation of drive ring 16. When drive gear 35 rotates to a set angular displacement s2 again (this set angular displacement s2 is set according to the inertia of drive motor 1 and driven gear 18 to ensure that drive gear 35 can smoothly mesh with driven gear 18 after reset), electromagnet 24 is de-energized, and reset spring 23 pushes drive gear 35 to move axially until it contacts limit boss 21, and meshes with driven gear 18 again. Drive ring 16 realizes forward rotation, continuously cycling until the cleaning component works for the set time. Specific Implementation Method Two

[0045] like Figure 4As shown in the figure, this specific embodiment provides a heat dissipation electrical box, including a box body 29, which is used to house electrical equipment, and also includes the above-mentioned dust removal and filtration unit. The filter cartridge 3 is mounted on the upper part of the box body 29 by a bracket. The air outlet branch 8 is connected to the box body 29. An air outlet grille 31 is provided on the box body 29. The dust removal box 9 is located outside the filter cartridge 3.

[0046] To reduce energy consumption, the fan 7 is a variable frequency blower 7. A temperature sensor is installed inside the housing 29, and the temperature sensor is electrically connected to the control module. By monitoring the temperature inside the housing 29, the rotation speed of the fan 7 is adjusted, thereby changing the air volume to avoid excessive air volume, so that the dust collection cylinder 14 reaches the state that needs cleaning more quickly, reducing the cleaning frequency. When the variable frequency blower 7 is used, when the anemometer detects that the actual wind speed is less than the ideal wind speed of the variable frequency blower 7 by 20% to 25%, the cleaning component performs cleaning.

[0047] like Figure 4 and Figure 5 As shown, since there are operating conditions where heat dissipation is not required, it is necessary to prevent dust from entering through the air outlet grille 31. In this specific embodiment, a filter screen 30 is provided on the housing 29, and the filter screen 30 is arranged opposite to the air outlet grille 31. For easy replacement, a retaining strip 32 is provided on the outer surface of the housing 29, and a mounting groove is provided on the retaining strip 32. A mounting frame is provided on the outside of the filter screen 30, and the mounting frame can move within the mounting groove.

[0048] As can be seen from the above specific embodiments, the present invention has the following beneficial effects:

[0049] 1. By setting up cleaning and ventilation components, dust removal and cleaning of the dust collector 14 can be carried out without disassembly, without disassembling the dust collector 14 or stopping related equipment;

[0050] 2. The switching plate 25 and the switching module can drive the drive ring 16 to rotate in the opposite direction under the direct action of the drive gear 35, which can clean both sides of the toothed protrusions of the dust collector 14 and improve the cleaning effect.

[0051] 3. By setting the air outlet three-way pipe 28 and the air outlet switching valve 33, the air outlet branch 8 can be closed and no longer connected to the housing 29 when cleaning the dust collector 14, so as to prevent the dust that has been cleaned from entering the housing 29.

[0052] 4. By using the variable frequency blower 7, the appropriate air volume can be provided for heat dissipation according to the temperature inside the housing 29, avoiding excessive air volume, which would cause frequent dust removal and cleaning of the dust collector 14 and energy loss.

[0053] 5. By setting up a filter screen 30, dust is prevented from entering the housing 29 through the air outlet grille 31.

[0054] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dust removal and filtration unit, comprising a filter cartridge (3), wherein the filter cartridge (3) is provided with an air inlet groove (4), characterized in that, Also includes: The dust removal assembly includes a dust removal cylinder (14), which is disposed inside the filter cylinder (3) and is made of stainless steel pleated filter element. The cleaning assembly includes a mounting base (2) disposed at the end of the filter cylinder (3). A drive ring (16) is rotatably disposed inside the mounting base (2). A drive module is connected to the drive ring (16). The drive module is connected to the mounting base (2). At least two brush strips (13) are disposed on the end face of the drive ring (16) near the dust collector cylinder (14). The brush strips (13) are arranged parallel to the dust collector cylinder (14). The brush strips (13) can extend into the tooth gaps of the dust collector cylinder (14). The ventilation assembly includes a fan (7), the air inlet of the fan (7) is provided with an air inlet tee pipe (27), the air inlet tee pipe (27) includes an air inlet branch one (5) and an air inlet branch two (6), the air inlet branch one (5) is provided with an air inlet switching valve (34), the air inlet branch one (5) is connected to the dust discharge hole of the filter cartridge (3), the air inlet branch two (6) is connected to the air outlet pipe of the dust collector (14), the air outlet of the fan (7) is provided with a dust collector box (9), and the air inlet of the fan (7) is provided with an anemometer; The air outlet of the fan (7) is provided with an air outlet tee pipe (28), which includes an air outlet branch 1 (8) and an air outlet branch 2 (10). An air outlet switching valve (33) is provided on the air outlet branch 1 (8) and the air outlet branch 2 (10). The air outlet branch 2 (10) is connected to the dust collection box (9), and the air outlet branch 1 (8) is used to connect to the box (29) where the electrical equipment is located.

2. The dust removal and filtration unit as described in claim 1, characterized in that, The drive module includes a drive motor (1), which is located outside the mounting base (2). The drive motor (1) is connected to a transmission shaft (20), and a drive gear (35) is provided on the transmission shaft (20). The drive gear (35) meshes with a driven gear (18), which is rotatably located inside the mounting base (2). The driven gear (18) meshes with a gear ring (17), which is located on the end face of the drive ring (16) away from the dust collector (14).

3. The dust removal and filtration unit as described in claim 2, characterized in that, Two driven gears (18) are provided and symmetrically arranged on both sides of the driving gear (35), and both driven gears (18) mesh with the gear ring (17).

4. The dust removal and filtration unit as described in claim 3, characterized in that, A switching plate (25) is rotatably provided at the end of the drive shaft (20). The switching plate (25) is connected to the inner wall of the drive ring (16). The switching plate (25) is located between the gear ring (17) and the dust collector (14). A switching module is provided on the switching plate (25). The switching module is connected to the drive gear (35). The switching module can drive the drive gear (35) to reciprocate along the drive shaft (20) and connect and disconnect from the switching plate (25). When the drive gear (35) is connected to the switching plate (25), the drive gear (35) no longer meshes with the driven gear (18).

5. The dust removal and filtration unit as described in claim 4, characterized in that, The switching module includes an electromagnet (24), an armature (22), and a return spring (23). The electromagnet (24) is disposed on the switching plate (25), the armature (22) is disposed on the end face of the drive gear (35) near the switching plate (25), and the return spring (23) is disposed on the transmission shaft (20). One end of the return spring (23) is connected to the switching plate (25), and the other end of the return spring (23) can abut against the drive gear (35).

6. A heat dissipation electrical box, comprising a box body (29) for housing electrical equipment, characterized in that, It also includes the dust removal and filtration unit as described in claim 5, wherein the filter cylinder (3) is disposed on the upper part of the housing (29), the first air outlet branch (8) is connected to the housing (29), the housing (29) is provided with an air outlet grille (31), and the dust removal box (9) is disposed outside the filter cylinder (3).

7. The heat dissipation electrical box as described in claim 6, characterized in that, The fan (7) is a variable frequency blower (7), and a temperature sensor is installed inside the housing (29).

8. The heat dissipation electrical box as described in claim 7, characterized in that, A filter screen (30) is provided on the housing (29), and the filter screen (30) is arranged opposite to the air outlet grille (31).

9. The heat dissipation electrical box as described in claim 8, characterized in that, The outer surface of the housing (29) is provided with an installation groove, and the filter screen (30) is provided with an installation frame on the outside, and the installation frame can move within the installation groove.

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