A filtering and dusting apparatus and method for network cabinets

Abstract

The application discloses a filtering and dust removing device and method for a network cabinet, and relates to the technical field of network communication equipment heat dissipation. The device comprises a network cabinet, a lifting driving mechanism, a filtering and dust removing plate, an exhaust fan, a temperature sensor and a differential pressure sensor; the upper plate body of the filtering and dust removing plate is provided with large-aperture first filtering holes, and the lower plate body is provided with small-aperture second filtering holes; the lifting driving mechanism adjusts the height of the filtering and dust removing plate according to the cabinet temperature, so that the air permeability of the air inlet window directly opposite to the filtering and dust removing plate is adaptively matched with the cabinet temperature; when the pressure difference between the two sides of the filtering and dust removing plate reaches a threshold value, the lifting driving mechanism drives the filtering and dust removing plate to reciprocatingly move up and down, and the impurities on the filtering and dust removing plate are cleaned in a mode that the surface is cleaned through the rotation of upper and lower cleaning rollers and the cleaning plug holes of the cleaning plug rods are cleaned; through the synergistic effect of the temperature control adaptive variable aperture and the two-step deep self-cleaning method, the dynamic balance between the heat dissipation efficiency and the filtering precision and the full-depth cleaning of the filtering holes are realized, and the maintenance period is significantly prolonged.

Description

Technical Field

[0001] This invention relates to the field of heat dissipation technology for network communication equipment, specifically to a filtration and dust removal device and method for network cabinets. Background Technology

[0002] Network cabinets, as centralized installation platforms for network communication equipment such as servers, switches, and routers, generate significant heat during operation. To ensure stable operation at suitable temperatures, network cabinets are typically equipped with exhaust fans that forcefully expel hot air while simultaneously drawing in cool air from the outside for heat dissipation. However, outside air contains particulate impurities such as dust and fibrous materials. If these enter the cabinet directly, they can adhere to circuit boards, heat sinks, and fan blades, leading to reduced heat dissipation efficiency, decreased electrical insulation performance, and even short-circuit failures. Therefore, installing a filtration and dust removal device at the air inlet of the network cabinet is crucial.

[0003] Chinese Patent Application No. 202411006650.7 discloses a deep learning server rack with a moisture-proof and dust-removing structure. The rack has a door rotatably connected to its side, casters fixedly connected to its bottom, a placement plate fixedly connected to its inner side, a baffle fixedly connected to the bottom of its inner cavity, a moisture-proof component fixedly connected to the bottom of the baffle, and a collection component fixedly connected to the bottom of the rack. By incorporating a dust-removing component, the rack utilizes a motor to drive fan blades that rotate on a support frame. The airflow generated by the rotating fan blades dissipates heat from the interior of the rack. Simultaneously, the airflow causes a cleaning mechanism to rotate on a filter plate, preventing dust accumulation on the filter plate during heat dissipation and thus avoiding interference with normal cooling.

[0004] Current filters typically use single-pore size media, meaning their filtration accuracy and ventilation area are fixed once installed. However, the actual heat generation of a network cabinet fluctuates dynamically with changes in equipment load: during peak load periods, equipment heat generation surges, requiring greater airflow to meet cooling demands. However, fixed-pore size filters, at higher filtration accuracy (smaller pore size), significantly increase airflow resistance, limiting ventilation and leading to insufficient cooling. During off-peak periods, equipment heat generation is lower, reducing the need for airflow. Using smaller pore size filters at these times can improve filtration accuracy and reduce fine dust entering the cabinet. Existing fixed-pore size solutions cannot dynamically adjust the filter pore size based on the actual cabinet temperature, making it difficult to balance the cooling requirements under high load with the filtration accuracy requirements under low load.

[0005] To address filter clogging, some existing technologies offer automated cleaning solutions, such as installing brush rollers on the filter surface and using a motor to drive them to rotate back and forth to remove accumulated dust; or using a vibration mechanism to shake the filter and dislodge dust. However, these cleaning solutions only work on the filter surface and are ineffective at removing particulate impurities embedded within the filter pores (especially highly adhesive substances such as electrostatically adsorbed fine carbon powder, oily dust, and fiber debris). With prolonged use, stubborn scale gradually forms on the inner walls of the filter pores, causing a continuous reduction in the effective pore size. Even after surface cleaning, the airflow resistance remains high, and the pressure differential frequently exceeds limits, increasing exhaust fan energy consumption and significantly shortening the filter's effective lifespan. Users are forced to frequently disassemble, clean, or replace the filter manually, resulting in high maintenance costs, especially in remote communication base stations and unattended data centers where maintenance is extremely inconvenient.

[0006] To address the aforementioned issues, there is an urgent need for a network cabinet filtration and dust removal device and method that can adaptively adjust the filter pore size according to the cabinet temperature and possess deep self-cleaning capabilities. Summary of the Invention

[0007] To overcome the shortcomings of existing technologies, the present invention aims to provide a filtration and dust removal device for network cabinets. This filtration and dust removal device has temperature-controlled adaptive variable pore size and pressure differential triggering deep self-cleaning capabilities. The effective utilization rate of the dust holding capacity of the filter and dust removal plate is significantly improved, and the manual maintenance cycle is greatly extended under the same dust environment. It is particularly suitable for remote communication base stations, data centers and other unattended or inconvenient places for maintenance, which significantly reduces the operation and maintenance labor costs and the risk of equipment shutdown due to high temperature caused by filter clogging.

[0008] The filtration and dust removal equipment includes a network cabinet, a lifting drive mechanism, a filter dust removal plate, an exhaust fan, a temperature sensor, and a differential pressure sensor. The network cabinet has a dust removal chamber and an air inlet window inside its side wall. The dust removal plate is slidably disposed in the dust removal chamber. The lifting drive mechanism is disposed on the top of the network cabinet and is connected to the dust removal plate. The dust removal plate blocks the air inlet window. The filter dust removal plate includes an upper plate and a lower plate. The upper plate has a plurality of first filter holes arranged in an array, and the lower plate has a second filter hole arranged in an array. The diameter of the first filter hole is larger than the diameter of the second filter hole. The filter dust removal chamber is equipped with an upper cleaning roller and a lower cleaning roller that rotate within it. The ends of the upper cleaning roller and the lower cleaning roller are respectively provided with an upper driven gear and a lower driven gear. The edge of the filter dust removal plate is provided with a drive rack, which meshes with both the upper driven gear and the lower driven gear simultaneously. The temperature sensor is used to sense the temperature inside the network cabinet. The lifting drive mechanism drives the filter dust removal plate to rise and fall to the corresponding height value according to the preset temperature range where the temperature is located. The differential pressure sensor is used to detect the air pressure difference on both sides of the filter dust removal plate. When the air pressure difference reaches a predetermined threshold, the lifting drive mechanism drives the filter dust removal plate to move up and down at least twice and then returns to the original height. During the up and down reciprocating movement of the filter dust removal plate, the upper cleaning roller and the lower cleaning roller are driven to rotate to clean the impurities on the filter dust removal plate. Furthermore, the portion of the filtration and dust removal chamber located above the air inlet window is the upper cavity, and the portion located below the air inlet window is the lower cavity. The upper cavity and the lower cavity are respectively provided with an upper cleaning orifice plate and a lower cleaning orifice plate. The upper cleaning orifice plate is provided with a plurality of first cleaning rods arranged in an array, and the lower cleaning orifice plate is provided with a plurality of second cleaning rods arranged in an array. The first cleaning rods correspond one-to-one with the first filter holes, and the second cleaning rods correspond one-to-one with the second filter holes.

[0009] Furthermore, an upper cleaning push rod and a lower cleaning push rod are fixedly provided on the side wall of the network cabinet; The end of the telescopic shaft of the upper cleaning push rod is fixedly connected to the upper cleaning orifice plate. The end of the telescopic shaft of the lower cleaning push rod is fixedly connected to the lower cleaning hole plate. The upper and lower cleaning push rods are used to push the upper cleaning plate and the lower cleaning plate respectively, so that the first cleaning rod and the second cleaning rod are inserted into the first filter hole and the second filter hole respectively, in order to clean the impurities in the first filter hole and the second filter hole.

[0010] Furthermore, the inner wall of the network cabinet is provided with an upper mounting window and a lower mounting window, which correspond to the upper cavity and the lower cavity, respectively. An upper mounting plate and a lower mounting plate are provided on the outer side of the upper mounting window and the lower mounting window, respectively. An upper cleaning push rod and a lower cleaning push rod are fixed to the upper mounting plate and the lower mounting plate, respectively.

[0011] Furthermore, the network cabinet is equipped with a fixed top plate; The lifting drive mechanism includes a drive motor and a threaded sleeve, and the drive motor is fixed to the fixed top plate; The lower end of the threaded sleeve is fixed to the top of the filter dust removal plate. The lower end of the output shaft of the drive motor is connected to a drive screw. The drive screw extends through the fixed top plate into the filter dust removal chamber. The lower end of the drive screw is located inside the threaded sleeve, and the drive screw is threadedly engaged with the threaded sleeve.

[0012] Furthermore, two slide rail groups are fixedly installed inside the dust removal chamber. The two slide rail groups are respectively fixed on both sides of the air inlet window. Each slide rail group includes an inner slide rail and an outer slide rail. The inner slide rail and the outer slide rail are respectively fixed on the inner walls of both sides of the dust removal chamber. Slide rail grooves are provided on the inner side of both the inner slide rail and the outer slide rail. Both sides of the filtration and dust removal chamber are provided with inner sliding strips and outer sliding strips. The filtration and dust removal plate is located between the inner slide rail and the outer slide rail. The inner sliding strip is limited to the slide rail groove of the inner slide rail, and the outer sliding strip is limited to the slide rail groove of the outer slide rail.

[0013] Furthermore, it also includes two sealing rollers, each sealing roller comprising a sealing shaft and an elastic sealing layer disposed outside the sealing shaft. The two sealing shafts are respectively disposed above and below the air inlet window, and the two ends of the sealing shafts are respectively rotatably disposed on the outer slide rail. The elastic sealing layer presses against the inner wall of the filter dust removal chamber and the surface of the filter dust removal plate.

[0014] Furthermore, the network cabinet has an exhaust port on the back, an exhaust pipe inside the exhaust port, an exhaust fan fixed inside the exhaust pipe, and an air guide pipe on the side wall of the exhaust pipe. One end of the air guide pipe is connected to the exhaust pipe, and the other end of the air guide pipe is connected to an air suction pipe. The air suction pipe is fixed to the back panel of the network cabinet, and both the upper and lower ends of the air suction pipe are connected to the side wall of the filter dust removal chamber. An air suction screen plate is provided inside the end of the air suction pipe. The bottom of the filtration and dust removal chamber is also provided with an impurity outlet, and the impurity outlet is provided with a removable cleaning baffle.

[0015] Furthermore, both the first cleaning rod and the second cleaning rod are provided with guide cone portions at their ends; Both the first and second cleaning rods are covered with an elastic cleaning layer on their outer walls.

[0016] The present invention also provides a filtration and dust removal method for network cabinets, the method using the above-mentioned filtration and dust removal equipment for network cabinets, the filtration and dust removal method comprising the following steps: S1: Preset a first temperature value T1, a second temperature value T2, and N+1 temperature ranges with successively increasing temperatures, wherein the first temperature value T1 is within the lowest temperature range, and the lower limit of the highest temperature range is T2; and the number of rows of the first filter holes and the second filter holes is N. Each temperature range value corresponds to a preset height value, which is the position height of the filter dust removal plate. Each height value corresponds to the number of rows of the first filter holes of the filter dust removal plate facing the air inlet at that position height. The higher the temperature, the more rows of the first filter holes facing the air inlet. S2: The temperature sensor monitors the temperature inside the network cabinet in real time. If the actual temperature value is lower than T1, the exhaust fan will be turned off; if the actual temperature value is higher than T1, the exhaust fan will be started and step S3 will be executed. S3: Determine the temperature range where the actual temperature is located, obtain the height value corresponding to the temperature range, and drive the lifting and dust removal plate to rise and fall to the height value so that the total area of ​​the filter holes matches the temperature inside the network cabinet, thereby matching the air intake volume of the air inlet window with the heat dissipation requirements of the network cabinet. S4: The differential pressure sensor detects the air pressure difference on both sides of the filter dust removal plate in real time. When the air pressure difference reaches a predetermined threshold, the lifting drive mechanism drives the filter dust removal plate to move up and down at least twice. During the up and down reciprocating movement, it first moves to the upper limit height and then moves to the lower limit height. During the lifting and lowering process of the filter dust removal plate, the filter dust removal plate drives the upper and lower cleaning rollers to rotate through the drive rack to clean the dust and impurities on the filter dust removal plate; S5: When the filter dust removal plate moves to the upper limit height, the first filter hole is aligned with the first cleaning rod. The upper cleaning push rod pushes the upper cleaning plate to move towards the upper plate of the filter dust removal plate, so that the first cleaning rod is inserted into the first filter hole and pushes out the dust and impurities in the first filter hole. When the filter dust removal plate moves down to the lower limit height, the second filter hole aligns with the second cleaning rod. The lower cleaning push rod pushes the lower cleaning plate to move towards the lower plate of the filter dust removal plate, so that the second cleaning rod is inserted into the second filter hole and pushes out the dust and impurities in the second filter hole.

[0017] The beneficial effects of the filtration and dust removal device and method for network cabinets of the present invention are as follows: (1) The filtration and dust removal equipment includes a network cabinet, a lifting drive mechanism, a filter dust removal plate, an exhaust fan, and a temperature sensor; the network cabinet has a filter dust removal chamber and an air inlet window inside its side wall, the filter dust removal plate is slidably disposed in the filter dust removal chamber, the lifting drive mechanism is connected to the filter dust removal plate, and the filter dust removal plate blocks the air inlet window; the filter dust removal plate includes an upper plate and a lower plate, the upper plate has a plurality of first filter holes arranged in an array, and the lower plate has a plurality of second filter holes arranged in an array, the diameter of the first filter holes being larger than the diameter of the second filter holes; the filtration and dust removal equipment monitors the temperature inside the network cabinet in real time through a temperature sensor, and the lifting drive mechanism controls the lifting and lowering of the filter dust removal plate according to the temperature signal, so as to adjust the large-diameter first filter hole and the small-diameter second filter hole facing the air inlet window. The proportion of filter holes is controlled to regulate the total area of ​​the filter holes within a certain range, thereby adjusting the air intake of the air inlet window to match the heat dissipation requirements of the network cabinet. When the cabinet load is low and the temperature is low, small-diameter filter holes are used to improve filtration accuracy and reduce the entry of fine dust into the cabinet. When the cabinet load is high and the temperature is high, it automatically switches to large-diameter filter holes to reduce air intake resistance, increase ventilation volume, and ensure heat dissipation efficiency. The adjustment process of large and small-diameter filter holes adopts a step-by-step adjustment, which has high adjustment accuracy. Compared with traditional fixed-diameter filters, this invention achieves a dynamic adaptive balance between heat dissipation and filtration through temperature control-linked variable pore size. It achieves closed-loop adaptive optimization between filtration efficiency and heat dissipation performance, avoiding the performance bottleneck of a single pore size under extreme conditions.

[0018] (2) The dust removal equipment also includes a differential pressure sensor, and the dust removal chamber is equipped with an upper cleaning roller and a lower cleaning roller. The ends of the upper cleaning roller and the lower cleaning roller are respectively equipped with an upper driven gear and a lower driven gear. The edge of the dust removal plate is equipped with a drive rack, which meshes with the upper driven gear and the lower driven gear at the same time. The dust removal chamber is also equipped with an upper cleaning orifice plate and a lower cleaning orifice plate. The upper cleaning orifice plate is equipped with a plurality of first cleaning rods arranged in an array, and the lower cleaning orifice plate is equipped with a plurality of second cleaning rods arranged in an array. The upper cleaning orifice plate and the lower cleaning orifice plate are respectively connected to the upper and lower cleaning push rods. When the pressure difference across the filter dust removal plate reaches a threshold, the lifting drive mechanism drives the filter dust removal plate to move up and down at least twice. This, through a rack and pinion transmission, synchronously rotates the upper and lower cleaning rollers, sweeping and loosening the accumulated flocculent dust and fibrous impurities on the filter dust removal plate surface. When the filter dust removal plate moves to its upper limit height, the first cleaning rod is inserted into the first filter hole, mechanically ejecting stubborn particles (such as electrostatically adsorbed micro-carbon powder and dust clumps) clogging the inner wall of the hole. When the filter dust removal plate moves to its lower limit height, the second cleaning rod is inserted into the second filter hole, performing the same ejection cleaning on the lower plate's filter holes. In the at least two reciprocating movements of the lifting drive mechanism during the cleaning process, the first reciprocation is used for surface cleaning and loosening of impurities, while the second reciprocation is performed after the rod ejection process to thoroughly sweep away the residue ejected by the rod from the filter plate surface, preventing impurities from being re-inhaled into the filter holes. Traditional single brush roller cleaning can only remove surface dust and is ineffective against stubborn impurities embedded in the holes. This invention achieves full-depth, residue-free cleaning of the filter holes through a coordinated cleaning process involving brushing the surface of the cleaning roller, ejecting from the insertion hole, and secondary sweeping away by the cleaning roller. This effectively prevents secondary pollution caused by "first pushing in and then sucking in." The cleaning efficiency and effect of this filtration and dust removal equipment on the filter dust removal plate are significantly improved compared to the single roller brush method.

[0019] (3) The lifting drive mechanism of this dust removal equipment not only undertakes the function of variable aperture adjustment, but also provides driving force for the rotation of the cleaning roller. When the dust removal plate is lifted, it drives the upper and lower cleaning rollers to rotate simultaneously through rack and pinion transmission. This structure simplifies the equipment structure, reduces electrical control nodes, and lowers manufacturing costs and failure rate. At the same time, the rotation speed of the cleaning roller is linked with the lifting speed of the dust removal plate, avoiding impact damage to the filter plate caused by high-speed rotation, and ensuring stable and reliable operation. The dust removal equipment forms a "U"-shaped sealing structure through the external slide rail and sealing roller. The rotatable structure of the sealing roller can achieve dynamic sealing while maintaining low frictional resistance, effectively preventing unfiltered air from bypassing the gap between the dust removal plate and the cavity and entering the cabinet, ensuring that all external air entering is effectively filtered.

[0020] (4) The exhaust pipe sidewall of the dust removal equipment is connected to the suction pipe via an air guide pipe, and the upper and lower ends of the suction pipe are connected to the sidewall of the dust removal chamber. When the exhaust fan is running, the airflow in the exhaust pipe generates airflow in the air guide pipe, thereby generating auxiliary suction force in the dust removal chamber. This timely removes dust and impurities that fall off during the cleaning roller brush and the push rod ejection process from the filtration area, and carries them to the impurity outlet for centralized collection with the help of the airflow. This reduces the difficulty of impurity cleaning, and the impurity cleaning process of the dust removal equipment ensures that the dust removal plate is always inside the air inlet window, thereby ensuring that impurity cleaning does not affect the heat dissipation process of the cabinet and ensuring uninterrupted heat dissipation. Attached Figure Description

[0021] Figure 1 This is a first three-dimensional structural schematic diagram of a filtration and dust removal device for a network cabinet according to an embodiment of the present invention.

[0022] Figure 2 This is a second three-dimensional structural diagram of a filtration and dust removal device for a network cabinet according to an embodiment of the present invention.

[0023] Figure 3 This is a third perspective structural diagram of a filtration and dust removal device for a network cabinet according to an embodiment of the present invention.

[0024] Figure 4 This is a first three-dimensional structural diagram of the internal components of a filtration and dust removal device for a network cabinet according to an embodiment of the present invention.

[0025] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0026] Figure 6 This is a second three-dimensional structural diagram of the internal components of a filtration and dust removal device for a network cabinet, according to an embodiment of the present invention.

[0027] Figure 7 yes Figure 6 Enlarged view of point B in the middle.

[0028] Figure 8 This is an exploded view of the internal components of a dust removal and filtration chamber in a dust removal and filtration device for a network cabinet, according to an embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the installation structure of the top cleaning plate of a filtration and dust removal device for a network cabinet according to an embodiment of the present invention.

[0030] Figure 10 This is a schematic diagram of the guide cone portion and elastic cleaning layer of the first cleaning rod of a filtration and dust removal device for a network cabinet according to an embodiment of the present invention.

[0031] Figure 11This is a flowchart of a filtration and dust removal method for network cabinets according to the present invention.

[0032] In the above diagram: 100 - Network cabinet, 101 - Fixed top plate, 110 - Air inlet, 120 - Exhaust fan, 121 - Exhaust pipe, 122 - Air duct, 123 - Suction pipe, 200 - Filter and dust removal chamber, 201 - Impurity outlet, 210 - Upper mounting plate, 220 - Lower mounting plate, 230 - Inner slide rail, 231 - Outer slide rail, 240 - Sealing roller, 241 - Sealing shaft, 24 - Elastic sealing layer, 300 - Drive motor, 301 - Drive screw, 302 - Threaded sleeve, 400 - Filter and dust removal plate, 410 - Upper plate Body, 411-First filter hole, 420-Lower plate body, 421-Second filter hole, 430-Drive rack, 440-Inner sliding clip, 441-Outer sliding clip, 500-Upper cleaning roller, 510-Upper driven gear, 520-Flexible cleaning layer, 600-Lower cleaning roller, 610-Lower driven gear, 700-Upper cleaning hole plate, 701-First cleaning insert rod, 702-Upper cleaning push rod, 710-Guide cone part, 720-Elastic cleaning layer, 800-Lower cleaning hole plate, 801-Second cleaning insert rod, 802-Lower cleaning push rod. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to embodiments. Of course, the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] Although the steps in this invention are arranged by reference numerals, this is not intended to limit the order of the steps. Unless the order of the steps is explicitly stated or the execution of a step requires other steps as a basis, the relative order of the steps can be adjusted. It is understood that the term "and / or" as used herein refers to and covers any and all possible combinations of one or more of the associated listed items.

[0035] Please refer to Figures 1 to 9 The present invention provides a filtration and dust removal device for a network cabinet, comprising a network cabinet 100, a lifting drive mechanism, a filtration and dust removal plate 400, an exhaust fan 120, a temperature sensor, and a differential pressure sensor.

[0036] The network cabinet 100 has an air inlet 110 on its side wall. The side wall of the network cabinet 100 has a double-layer structure, and a dust removal chamber 200 is provided inside the side wall. The dust removal plate 400 is slidably disposed in the dust removal chamber 200. A lifting drive mechanism is located at the top of the network cabinet 100 and is connected to the dust removal plate 400. The lifting drive mechanism is used to drive the dust removal plate 400 to rise and fall within the dust removal chamber 200. The dust removal plate 400 always blocks the air inlet 110 during the rising and falling process. The network cabinet 100 has an exhaust port at the back, and an exhaust pipe 121 is provided inside the exhaust port. An exhaust fan 120 is fixedly installed inside the exhaust pipe 121. The exhaust fan 120 is used to exhaust the air inside the network cabinet 100, allowing outside air to enter the network cabinet 100 through the air inlet 110, thereby dissipating heat from the components inside the network cabinet 100. Protective nets can also be installed at both ends of the exhaust pipe 121.

[0037] The number of air intake windows 110 is one or more, and the lifting drive mechanism is set accordingly. In this embodiment, the number of air intake windows 110 and lifting drive mechanisms are both two. Two slide rail groups are fixedly installed inside the dust removal chamber 200. The two slide rail groups are respectively fixed on both sides of the air inlet window 110. Each slide rail group includes an inner slide rail 230 and an outer slide rail 231. The inner slide rail 230 and the outer slide rail 231 are respectively fixed to the inner walls of both sides of the dust removal chamber 200. The inner side of the inner slide rail 230 and the outer slide rail 231 are provided with slide rail grooves. The dust removal chamber 200 is provided with an inner sliding retainer 440 and an outer sliding retainer 441 on both sides. The dust removal plate 400 is located between the inner slide rail 230 and the outer slide rail 231. The inner sliding retainer 440 is limited to the slide rail groove of the inner slide rail 230, and the outer sliding retainer 441 is limited to the slide rail groove of the outer slide rail 231. In this way, the dust removal plate 400 can be stably slidably installed in the dust removal chamber 200.

[0038] The network cabinet 100 has a fixed top plate 101 on top; the fixed top plate 101 encloses the top of the filter dust removal chamber 200. The lifting drive mechanism includes a drive motor 300 and a threaded sleeve 302. The drive motor 300 is fixed to the fixed top plate 101; the lower end of the threaded sleeve 302 is fixed to the top of the filter dust removal plate 400. The lower end of the output shaft of the drive motor 300 is connected to a drive screw 301. The drive screw 301 passes through the fixed top plate 101 and extends into the filter dust removal chamber 200. The lower end of the drive screw 301 is located inside the threaded sleeve 302, and the drive screw 301 and the threaded sleeve 302 are threadedly engaged. The drive motor 300 drives the drive screw 301 to rotate, which in turn drives the filter dust removal plate 400 to slide and lift within the filter dust removal chamber 200.

[0039] The filter dust removal plate 400 includes an upper plate 410 and a lower plate 420. The upper plate 410 has a plurality of first filter holes 411 arranged in an array, and the lower plate 420 has a second filter hole 421 arranged in an array. The diameter of the first filter holes 411 is larger than the diameter of the second filter holes 421. In this embodiment, both the first filter holes 411 and the second filter holes 421 are arranged in 7 rows, and the center-to-center distance between the second filter holes 421 and the first filter holes 411 is equal. When the filter dust removal plate 400 closes the air inlet window 110, all 7 rows of filter holes (either the first filter holes 411 or the second filter holes 421) are completely aligned with the air inlet window 110. Adjusting the height of the filter dust removal plate 400, thereby adjusting the number of rows of the first filter holes 411 facing the air inlet window 110, can adjust the total filtration and air intake area of ​​the air inlet window 110. That is, the lower the filter dust removal plate 400, the more rows of the first filter holes 411 facing the air inlet window 110, the larger the total filtration and air intake area, and the stronger the heat dissipation capacity of the network cabinet 100 (correspondingly, the weaker the ability to block air impurities). Conversely, the higher the filter dust removal plate 400, the fewer rows of the first filter holes 411 facing the air inlet window 110, the weaker the heat dissipation capacity of the network cabinet 100 (the stronger the ability to block air impurities).

[0040] The dust removal chamber 200 contains an upper cleaning roller 500 and a lower cleaning roller 600, which are rotatably mounted on an outer slide rail 231 at both ends. An upper driven gear 510 and a lower driven gear 610 are respectively provided at the ends of the upper and lower cleaning rollers 500 and 600. A drive rack 430 is provided at the edge of the dust removal plate 400, and the drive rack 430 meshes with both the upper and lower driven gears 510. The outer walls of both the upper and lower cleaning rollers 500 and 600 are provided with a flexible cleaning layer 520, which can be made of bristles or sponge material. The flexible cleaning layer 520 is pressed against the surface of the filter dust removal plate 400. When the filter dust removal plate 400 moves up and down, the upper cleaning roller 500 and the lower cleaning roller 600 can be rotated by the drive rack 430. This causes the flexible cleaning layer 520 on the upper cleaning roller 500 and the lower cleaning roller 600 to brush and clean the surface of the filter dust removal plate 400. Furthermore, the outer diameter of the upper driven gear 510 and the lower driven gear 610 is smaller than the outer diameter of the flexible cleaning layer 520. This allows the linear velocity of the flexible cleaning layer 520 to be greater than the lifting speed of the filter dust removal plate 400, ensuring that the flexible cleaning layer 520 can move relative to the filter dust removal plate 400, thereby improving the brushing cleaning effect.

[0041] The temperature sensor (not shown) is installed inside the network cabinet 100. The temperature sensor is used to sense the temperature inside the network cabinet 100. The lifting drive mechanism drives the filter dust removal plate 400 to rise and fall to the corresponding height value according to the preset temperature range in which the temperature is located. The differential pressure sensor is used to detect the air pressure difference on both sides of the filter dust removal plate 400. When the air pressure difference reaches a predetermined threshold, the lifting drive mechanism drives the filter dust removal plate 400 to move up and down at least twice and then return to its original height. During the up and down reciprocating movement of the filter dust removal plate 400, it drives the upper cleaning roller 500 and the lower cleaning roller 600 to rotate to clean impurities on the filter dust removal plate 400.

[0042] This filtration and dust removal equipment monitors the temperature inside the network cabinet 100 in real time using a temperature sensor. The lifting drive mechanism controls the lifting and lowering of the filter and dust removal plate 400 based on the temperature signal. This allows adjustment of the ratio between the large-diameter first filter hole 411 and the small-diameter second filter hole 421 facing the air inlet 110, thereby controlling the total area of ​​the filter holes within a certain range and adjusting the air intake of the air inlet 110 to match the heat dissipation requirements of the network cabinet 100. When the cabinet load is low and the temperature is low, the small-diameter filter hole is used to improve filtration accuracy and reduce the entry of fine dust into the cabinet. When the cabinet load is high and the temperature is high, it automatically switches to the large-diameter filter hole to reduce air intake resistance, increase ventilation volume, and ensure heat dissipation efficiency. The adjustment is highly precise. Compared with traditional fixed-diameter filters, this invention achieves closed-loop adaptive optimization between filtration efficiency and heat dissipation performance, avoiding the performance bottleneck of a single aperture under extreme conditions.

[0043] In a preferred embodiment, the portion of the filter dust removal chamber 200 located above the air inlet window 110 is the upper chamber, and the portion located below the air inlet window 110 is the lower chamber. The upper chamber and the lower chamber are respectively provided with an upper cleaning orifice plate 700 and a lower cleaning orifice plate 800. The upper cleaning orifice plate 700 is provided with a plurality of first cleaning inserts 701 arranged in an array, and the lower cleaning orifice plate 800 is provided with a plurality of second cleaning inserts 801 arranged in an array. The first cleaning inserts 701 correspond one-to-one with the first filter holes 411, and the second cleaning inserts 801 correspond one-to-one with the second filter holes 421. The network cabinet 100 is fixedly provided with an upper cleaning push rod 702 and a lower cleaning push rod 802 on its side wall. Both the upper cleaning push rod 702 and the lower cleaning push rod 802 are electric push rods. The telescopic shaft end of the upper cleaning push rod 702 is fixedly connected to the upper cleaning hole plate 700, and the telescopic shaft end of the lower cleaning push rod 802 is fixedly connected to the lower cleaning hole plate 800. The upper and lower cleaning push rods are used to push the upper cleaning hole plate 700 and the lower cleaning hole plate 800, respectively, so that the first cleaning insert 701 and the second cleaning insert 801 are inserted into the first filter hole 411 and the second filter hole 421, respectively, to clean the impurities in the first filter hole 411 and the second filter hole 421. The inner wall of the network cabinet 100 is provided with an upper mounting window and a lower mounting window, which correspond to the upper cavity and the lower cavity, respectively. The outer sides of the upper mounting window and the lower mounting window are respectively provided with an upper mounting plate 210 and a lower mounting plate 220. The upper cleaning push rod 702 and the lower cleaning push rod 802 are respectively fixed on the upper mounting plate 210 and the lower mounting plate 220.

[0044] The differential pressure sensor includes two pressure sensors located inside and outside the air inlet window 110, respectively, to detect the pressure difference across the filter dust removal plate 400. When the pressure difference reaches a threshold, it indicates that the filter dust removal plate 400 is significantly clogged, and the cleaning process begins: the lifting drive mechanism drives the filter dust removal plate 400 to move up and down at least twice. The filter dust removal plate 400, through the drive rack 430 and gear meshing, synchronously drives the upper cleaning roller 500 and the lower cleaning roller 600 to rotate, thus cleaning the filter dust removal plate. The filter dust removal plate 400 is rotated to sweep away and loosen the accumulated flocculent dust and fibrous impurities on its surface. When the filter dust removal plate 400 moves to its upper limit height, the first cleaning rod 701 is inserted into the first filter hole 411 to mechanically eject stubborn particles (such as electrostatically adsorbed tiny carbon powders and dust clumps) clogging the inner wall of the hole. When the filter dust removal plate 400 moves to its lower limit height, the second cleaning rod 801 is inserted into the second filter hole 421 to perform the same ejection cleaning on the filter holes of the lower plate 420. In at least two reciprocating motions during the cleaning process, the lifting drive mechanism performs a first reciprocating motion for surface cleaning and loosening of impurities, and a second reciprocating motion after the rod ejection process is completed to thoroughly sweep away the residue ejected by the rod from the surface of the filter plate, preventing impurities from being re-inhaled into the filter holes. Traditional single brush roller cleaning can only remove surface dust and is ineffective against stubborn impurities embedded in the holes. This invention achieves full-depth, residue-free cleaning of the filter holes through a coordinated cleaning process involving brushing the surface of the cleaning roller, ejecting from the insertion hole, and secondary sweeping away by the cleaning roller. This effectively prevents secondary pollution caused by "first pushing in and then sucking in." The cleaning efficiency and effect of this filtration and dust removal equipment on the filter dust removal plate 400 are significantly improved compared to the single roller brush method.

[0045] In a preferred embodiment, two sealing rollers 240 are also included. Each sealing roller 240 includes a sealing shaft 241 and an elastic sealing layer 242 disposed outside the sealing shaft 241. The elastic sealing layer 242 may be made of rubber. The two sealing shafts 241 are respectively disposed above and below the air inlet window 110. The two ends of the sealing shafts 241 are rotatably mounted on the outer slide rail 231. The elastic sealing layer 242 presses against the inner wall of the filter dust removal chamber 200 and the surface of the filter dust removal plate 400. This filter dust removal device forms a "U"-shaped sealing structure through the outer slide rail 231 and the sealing rollers 240. The rotatable structure of the sealing rollers 240 can achieve dynamic sealing while maintaining low frictional resistance, effectively preventing unfiltered air from bypassing the gap between the filter dust removal plate 400 and the chamber and entering the cabinet, ensuring that all external air entering is effectively filtered.

[0046] In a preferred embodiment, the side wall of the exhaust stack 121 is also provided with an air guide pipe 122. One end of the air guide pipe 122 is connected to the exhaust stack 121, and the other end of the air guide pipe 122 is connected to an air suction pipe 123. The air suction pipe 123 is fixed to the back plate of the network cabinet 100. Both the upper and lower ends of the air suction pipe 123 are connected to the side wall of the filter dust removal chamber 200. An air suction screen plate is provided inside the end of the air suction pipe 123. The bottom of the filter dust removal chamber 200 is also provided with an impurity outlet 201. A removable cleaning baffle (not shown) is provided on the impurity outlet 201. When the exhaust fan 120 is running, the negative pressure in the exhaust stack 121 generates a suction force in the air guide pipe 122, which promptly removes the dust and impurities that fall off during the cleaning roller brush and the push rod ejection process from the filtration area. The dust and impurities are carried to the edge of the filter dust removal chamber 200 by the airflow, and then fall to the impurity outlet 201 and concentrate. Thus, the impurities at the impurity outlet 201 can be cleaned by removing the cleaning baffle, reducing the difficulty of impurity cleaning.

[0047] In the preferred implementation, refer to Figure 10 Both the first cleaning rod 701 and the second cleaning rod 801 have guide cone portions 710 at their ends; the outer walls of both the first cleaning rod 701 and the second cleaning rod 801 are covered with an elastic cleaning layer 720 made of rubber. The guide cone portions 710 play a guiding and centering role when the cleaning rods are inserted into the filter holes. Even if the filter dust removal plate 400 has slight positional deviations due to manufacturing tolerances or long-term use, the guide cone portions 710 can still smoothly guide the cleaning rods into the filter holes, avoiding rigid collisions that could cause jamming or damage. The elastic cleaning layer 720 forms elastic contact with the inner wall of the filter holes, which can effectively scrape away stubborn impurities attached to the hole walls without scratching or wearing the inner walls of the filter holes, thus extending the service life of the filter dust removal plate 400.

[0048] It should be noted that the filtration and dust removal equipment also includes a controller and a power supply unit. The controller is used to control the various power components to perform the above process based on the temperature and differential pressure sensed by the temperature sensor and differential pressure sensor. The power supply unit is used to supply power to the temperature sensor, differential pressure sensor and various power components.

[0049] refer to Figure 11 The present invention also provides a filtration and dust removal method for network cabinets, the method using the above-mentioned filtration and dust removal equipment, the filtration and dust removal method comprising the following steps: S1: Preset temperature values ​​T1, T2, and N+1 temperature ranges with sequentially increasing temperatures, wherein the first temperature value T1 is within the first temperature range (lowest temperature range), and the lower limit of the N+1 temperature range value (highest temperature range) is T2; and the number of rows of the first filter holes 411 and the second filter holes 421 is N. Each temperature range value corresponds to a preset height value, which is the position height of the filter dust removal plate 400. Each height value corresponds to a first filter hole 421 of the filter dust removal plate 400 directly facing the air inlet window 110 at that position height. The number of rows is 11. The higher the temperature, the more rows of the first filter holes 411 facing the air intake window 110. For example, if the number of rows of the first filter holes 411 and the second filter holes 421 are both 7, then there are 8 temperature ranges. When in the first temperature range (the lowest temperature range), 7 rows of second filter holes 421 are facing the air intake window 110 (the number of rows of first filter holes 411 facing the air intake window 110 is 0). When in the eighth temperature range (the highest temperature range, i.e., the temperature is higher than the second temperature value T2), 7 rows of first filter holes 411 are facing the air intake window 110, and the heat dissipation capacity is the strongest at this time. S2: The temperature sensor monitors the temperature inside the network cabinet 100 in real time. If the actual temperature value is lower than T1, the exhaust fan 120 will be turned off. At this time, the heat dissipation demand is very small, and heat dissipation is only achieved through natural air circulation. If the actual temperature value is higher than T1, the exhaust fan 120 will be turned on, and step S3 will be executed. S3: Determine the temperature range where the actual temperature is located, obtain the height value corresponding to the temperature range, and drive the lifting and dust removal plate 400 to rise and fall to the height value so that the total area of ​​the filter holes matches the temperature inside the network cabinet 100, thereby matching the air intake volume of the air inlet 110 with the heat dissipation requirements of the network cabinet 100. S4: The differential pressure sensor detects the air pressure difference on both sides of the filter dust removal plate 400 in real time. When the air pressure difference reaches a predetermined threshold, the lifting drive mechanism drives the filter dust removal plate 400 to move up and down at least twice before returning to its original height. During the up and down reciprocating movement, it first moves to the upper limit height and then moves to the lower limit height. During the lifting and lowering process of the filter dust removal plate 400, the filter dust removal plate 400 drives the upper cleaning roller 500 and the lower cleaning roller 600 to rotate through the drive rack 430 in order to clean the dust and impurities on the filter dust removal plate 400. S5: When the filter dust removal plate 400 moves up to the upper limit height, the first filter hole 411 is aligned with the first cleaning rod 701, and the upper cleaning push rod 702 pushes the upper cleaning plate 700 to move towards the upper plate body 410 of the filter dust removal plate 400, so that the first cleaning rod 701 is inserted into the first filter hole 411 and pushes out the dust and impurities in the first filter hole 411. When the filter dust removal plate 400 moves down to the lower limit height, the second filter hole 421 is aligned with the second cleaning rod 801. The lower cleaning push rod 802 pushes the lower cleaning plate 800 to move towards the lower plate body 420 of the filter dust removal plate 400, so that the second cleaning rod 801 is inserted into the second filter hole 421 and pushes out the dust and impurities in the second filter hole 421.

[0050] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0051] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 filtration and dust removal device for network cabinets, characterized in that: Includes network cabinet (100), lifting drive mechanism, filter dust removal plate (400), exhaust fan (120), temperature sensor and differential pressure sensor; The network cabinet (100) has a dust removal chamber (200) and an air inlet window (110) inside its side wall. The dust removal plate (400) is slidably disposed in the dust removal chamber (200). The lifting drive mechanism is disposed on the top of the network cabinet (100) and is connected to the dust removal plate (400). The dust removal plate (400) blocks the air inlet window (110). The filter dust removal plate (400) includes an upper plate (410) and a lower plate (420). The upper plate (410) has a plurality of first filter holes (411) arranged in an array, and the lower plate (420) has a second filter hole (421) arranged in an array. The diameter of the first filter hole (411) is larger than the diameter of the second filter hole (421). The dust removal chamber (200) is rotatably equipped with an upper cleaning roller (500) and a lower cleaning roller (600). The upper cleaning roller (500) and the lower cleaning roller (600) are respectively equipped with an upper driven gear (510) and a lower driven gear (610) at their ends. The dust removal plate (400) is equipped with a drive rack (430) at its edge. The drive rack (430) meshes with both the upper driven gear (510) and the lower driven gear (610). The temperature sensor is used to sense the temperature inside the network cabinet (100). The lifting drive mechanism drives the filter dust removal plate (400) to rise and fall to the corresponding height value according to the preset temperature range where the temperature is located. The differential pressure sensor is used to detect the air pressure difference on both sides of the filter dust removal plate (400). When the air pressure difference reaches a predetermined threshold, the lifting drive mechanism drives the filter dust removal plate (400) to move up and down at least twice. During the up and down reciprocating movement of the filter dust removal plate (400), the upper cleaning roller (500) and the lower cleaning roller (600) are driven to rotate to clean the impurities on the filter dust removal plate (400).

2. The filtration and dust removal equipment for network cabinets according to claim 1, characterized in that: The dust removal chamber (200) is located above the air inlet window (110) as the upper chamber and below the air inlet window (110) as the lower chamber. The upper chamber and the lower chamber are respectively provided with an upper cleaning plate (700) and a lower cleaning plate (800). The upper cleaning plate (700) is provided with a plurality of first cleaning rods (701) arranged in an array, and the lower cleaning plate (800) is provided with a plurality of second cleaning rods (801) arranged in an array. The first cleaning rods (701) correspond one-to-one with the first filter holes (411), and the second cleaning rods (801) correspond one-to-one with the second filter holes (421).

3. A filtration and dust removal device for network cabinets according to claim 2, characterized in that: The network cabinet (100) is fixedly provided with an upper cleaning push rod (702) and a lower cleaning push rod (802) on its side wall. The telescopic shaft end of the upper cleaning push rod (702) is fixedly connected to the upper cleaning orifice plate (700). The end of the telescopic shaft of the lower cleaning push rod (802) is fixedly connected to the lower cleaning hole plate (800). The upper and lower cleaning push rods are used to push the upper cleaning plate (700) and the lower cleaning plate (800) respectively, so that the first cleaning rod (701) and the second cleaning rod (801) are inserted into the first filter hole (411) and the second filter hole (421) respectively, so as to clean the impurities in the first filter hole (411) and the second filter hole (421).

4. A filtration and dust removal device for network cabinets according to claim 2, characterized in that: The inner wall of the network cabinet (100) is provided with an upper mounting window and a lower mounting window, which correspond to the upper cavity and the lower cavity respectively. The outer sides of the upper mounting window and the lower mounting window are provided with an upper mounting plate (210) and a lower mounting plate (220) respectively. The upper cleaning push rod (702) and the lower cleaning push rod (802) are fixed on the upper mounting plate (210) and the lower mounting plate (220) respectively.

5. A filtration and dust removal device for network cabinets according to claim 1, characterized in that: The network cabinet (100) is provided with a fixed top plate (101) on top; The lifting drive mechanism includes a drive motor (300) and a threaded sleeve (302), and the drive motor (300) is fixed on the fixed top plate (101); The lower end of the threaded sleeve (302) is fixed to the top of the filter dust removal plate (400). The lower end of the output shaft of the drive motor (300) is connected to the drive screw (301). The drive screw (301) extends through the fixed top plate (101) into the filter dust removal chamber (200). The lower end of the drive screw (301) is located inside the threaded sleeve (302). The drive screw (301) is threadedly engaged with the threaded sleeve (302).

6. A filtration and dust removal device for network cabinets according to claim 1, characterized in that: Two slide rail groups are fixedly installed inside the dust removal chamber (200). The two slide rail groups are respectively fixed on both sides of the air inlet window (110). Each slide rail group includes an inner slide rail (230) and an outer slide rail (231). The inner slide rail (230) and the outer slide rail (231) are respectively fixed on the inner walls of both sides of the dust removal chamber (200). The inner slide rail (230) and the outer slide rail (231) are provided with slide rail grooves on their inner sides. The dust removal chamber (200) is provided with an inner sliding strip (440) and an outer sliding strip (441) on both sides. The dust removal plate (400) is located between the inner slide rail (230) and the outer slide rail (231). The inner sliding strip (440) is limited to the slide rail groove of the inner slide rail (230), and the outer sliding strip (441) is limited to the slide rail groove of the outer slide rail (231).

7. A filtration and dust removal device for a network cabinet according to claim 6, characterized in that: It also includes two sealing rollers (240), each sealing roller (240) including a sealing shaft (241) and an elastic sealing layer (242) disposed outside the sealing shaft (241). The two sealing shafts (241) are respectively disposed above and below the air inlet window (110). The two ends of the sealing shaft (241) are respectively rotatably disposed on the outer slide rail (231). The elastic sealing layer (242) presses against the inner wall of the filter dust removal chamber (200) and the surface of the filter dust removal plate (400).

8. A filtration and dust removal device for a network cabinet according to claim 1, characterized in that: The network cabinet (100) has an exhaust port on the back, and an exhaust pipe (121) is provided inside the exhaust port. An exhaust fan (120) is fixedly provided inside the exhaust pipe (121). An air guide pipe (122) is also provided on the side wall of the exhaust pipe (121). One end of the air guide pipe (122) is connected to the exhaust pipe (121), and the other end of the air guide pipe (122) is connected to an air suction pipe (123). The air suction pipe (123) is fixed to the back plate of the network cabinet (100). The upper and lower ends of the air suction pipe (123) are connected to the side wall of the filter dust removal chamber (200). An air suction screen plate is provided inside the end of the air suction pipe (123). The bottom of the filtration and dust removal chamber (200) is also provided with an impurity outlet (201), and the impurity outlet (201) is provided with a removable cleaning baffle.

9. A filtration and dust removal device for a network cabinet according to claim 1, characterized in that: Both the first cleaning rod (701) and the second cleaning rod (801) are provided with guide cones (710) at their ends. The outer walls of both the first cleaning rod (701) and the second cleaning rod (801) are covered with an elastic cleaning layer (720).

10. A method for filtering and removing dust in a network cabinet, characterized in that: This method uses the filtration and dust removal equipment for network cabinets as described in any one of claims 2-9, and the filtration and dust removal method includes the following steps: S1: A first temperature value T1, a second temperature value T2, and N+1 temperature ranges with successively increasing temperatures are preset. The first temperature value T1 is within the lowest temperature range, and the lower limit of the highest temperature range is T2. The number of rows of the first filter hole (411) and the second filter hole (421) is N. Each temperature range corresponds to a preset height value, which is the position height of the filter dust removal plate (400). Each height value corresponds to the number of rows of the first filter hole (411) of the filter dust removal plate (400) facing the air inlet window (110) at that position height. The higher the temperature, the more rows of the first filter hole (411) facing the air inlet window (110). S2: The temperature sensor monitors the temperature inside the network cabinet (100) in real time. If the actual temperature value is lower than T1, the exhaust fan (120) will be turned off; if the actual temperature value is higher than T1, the exhaust fan (120) will be started and step S3 will be executed. S3: Determine the temperature range where the actual temperature is located, obtain the height value corresponding to the temperature range, and drive the lifting and lowering mechanism to lift the filter dust removal plate (400) to the height value so that the total area of ​​the filter holes matches the temperature inside the network cabinet (100) so that the air intake of the air inlet window (110) matches the heat dissipation requirements of the network cabinet (100). S4: The differential pressure sensor detects the air pressure difference on both sides of the filter dust removal plate (400) in real time. When the air pressure difference reaches a predetermined threshold, the lifting drive mechanism drives the filter dust removal plate (400) to move up and down at least twice and then returns to its original height. When moving up and down, it first moves to the upper limit height and then moves to the lower limit height. During the lifting and lowering process of the filter dust removal plate (400), the filter dust removal plate (400) drives the upper cleaning roller (500) and the lower cleaning roller (600) to rotate through the drive rack (430) to clean the dust and impurities on the filter dust removal plate (400); S5: When the filter dust removal plate (400) moves to the upper limit height, the first filter hole (411) is aligned with the first cleaning rod (701), and the upper cleaning push rod (702) pushes the upper cleaning plate (700) to move towards the upper plate body (410) of the filter dust removal plate (400), so that the first cleaning rod (701) is inserted into the first filter hole (411) and pushes out the dust and impurities in the first filter hole (411); When the filter dust removal plate (400) moves down to the lower limit height, the second filter hole (421) is aligned with the second cleaning rod (801), and the lower cleaning push rod (802) pushes the lower cleaning plate (800) to move towards the lower plate body (420) of the filter dust removal plate (400), so that the second cleaning rod (801) is inserted into the second filter hole (421) and pushes out the dust and impurities in the second filter hole (421).

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