Energy-saving fresh air conditioner cabinet and control method thereof

Abstract

The invention relates to the technical field of communication equipment, and discloses an energy-saving fresh air conditioner cabinet and a control method thereof.The energy-saving fresh air conditioner cabinet comprises a cabinet body, an air conditioner module, a fresh air module and a control module, the air conditioner module and the fresh air module are arranged in the cabinet body, and the control module is electrically connected with the fresh air module and the air conditioner module; the fresh air module comprises a filter screen arranged at the air inlet channel of the cabinet body, a fan device capable of switching the airflow direction and a dust removal unit; the dust removal unit comprises a cleaning execution part, a drying part and a parameter sensing part; the cleaning execution part comprises a soft cleaning brush and a hard cleaning brush. The dust removal unit is arranged to cooperate with the control module, moist adhesion type accumulated dust and dry loose type accumulated dust can be accurately recognized, a hard brush reinforced cleaning mode and a soft brush conventional cleaning mode are adopted, intelligent self-adaptive self-cleaning of the filter screen is achieved, it can be ensured that the filter screen is effectively cleaned, and the cleaning efficiency is improved. And the temperature in the cabinet is kept stable.

Description

Technical Field

[0001] This invention relates to the field of communication equipment technology, and more specifically, to an energy-saving fresh air conditioning cabinet and its control method. Background Technology

[0002] As 5G networks extend to mountainous and remote areas, communication base station cabinets face severe environmental challenges. Mountainous areas experience large temperature differences between day and night, frequent winds and dust, and drastic changes in air humidity, which places higher demands on the temperature control and dust protection of communication equipment inside the cabinets.

[0003] Currently, common temperature control solutions for communication cabinets mainly include single air conditioners, single fresh air systems, or simple combinations thereof. Single air conditioners offer high temperature control accuracy but consume enormous amounts of energy, making them unsuitable for mountainous sites with limited power supply. While single fresh air systems are energy-efficient, their temperature control capabilities are greatly affected by the external environment, and their dustproofing effect is limited; dust in mountainous areas easily penetrates and causes equipment malfunctions. Existing combined fresh air and air conditioning cabinets, although possessing the advantages of both, generally suffer from problems such as unintelligent temperature control mode switching, easily clogged dustproof structures, and lack of self-cleaning capabilities. In particular, their dust removal design often uses fixed filters, which, in the humid environment of mountainous areas, easily clump together and clog the filters, reducing ventilation efficiency and incurring high manual cleaning and maintenance costs.

[0004] Therefore, there is an urgent need for an integrated cabinet solution that can automatically adapt to the complex climate of mountainous areas, has intelligent temperature control and efficient self-cleaning capabilities, and is easy to remotely manage. Summary of the Invention

[0005] The purpose of this invention is to provide an energy-saving fresh air conditioning cabinet and its control method to solve the above-mentioned technical problems.

[0006] The present invention solves the above-mentioned technical problems through the following technical solutions: The present invention provides an energy-saving fresh air air conditioning cabinet, comprising: a cabinet body, an air conditioning module and a fresh air module disposed in the cabinet body, and a control module electrically connected to the fresh air module and the air conditioning module. The fresh air module includes a filter screen disposed at the air inlet channel of the cabinet body, a fan device that can switch the airflow direction, and a dust removal unit. The dust removal unit includes: Cleaning actuators, including soft cleaning brushes and hard cleaning brushes, selectively bring either the soft or hard cleaning brush into contact with the filter surface. A drying component, which is mounted on the cleaning actuator, is used to blow hot air directionally onto the surface of the filter screen; The parameter sensing element is used to detect the humidity data of the central area of ​​the windward side of the filter, as well as the pressure difference data between the inside and outside of the filter. The control module is configured to: when the differential pressure detection value exceeds the preset differential pressure threshold, determine the dust accumulation status by combining the detected humidity data and differential pressure change rate; if it is determined to be damp and adhesive dust, control the drying unit to work for a preset time to dry the filter screen, then control the cleaning actuator to switch to a hard cleaning brush to clean the filter screen, and simultaneously control the fan device to switch to reverse blowing mode to make the airflow flow from the inside of the cabinet to the outside; if it is determined to be dry and loose dust, control the cleaning actuator to switch to a soft cleaning brush to clean the filter screen, and simultaneously control the fan device to switch to reverse blowing mode.

[0007] Preferably, the cleaning actuator includes a movable frame slidably disposed at the air inlet channel of the cabinet body, a linear drive mechanism for driving the movable frame to reciprocate along the surface of the filter screen, and a switching drive mechanism disposed on the movable frame. The soft cleaning brush and the hard cleaning brush are mounted side by side on the movable frame, and the switching drive mechanism is used to drive the soft cleaning brush or the hard cleaning brush to contact the surface of the filter screen.

[0008] Preferably, the switching drive mechanism includes a servo motor, a transmission gear connected to the output end of the servo motor, and two parallel transmission gear plates. The transmission gear meshes with the two first transmission gear plates respectively, and the two transmission gear plates are connected to a soft cleaning brush and a hard cleaning brush respectively.

[0009] Preferably, the linear drive mechanism is an electric push rod, the telescopic end of which is fixedly connected to one side of the movable frame.

[0010] Preferably, the drying component includes an electric heating element mounted on a movable frame and a miniature fan, with the air outlet of the miniature fan facing the surface of the filter screen.

[0011] Preferably, the parameter sensing element includes a non-contact infrared humidity sensor disposed in the central area of ​​the windward side of the filter, and a first pressure sensor and a second pressure sensor disposed on the outer and inner sides of the filter.

[0012] Preferably, the control module calculates the differential pressure change rate K using the following formula: K=(ΔP current -ΔP previous ) / Δt; Wherein, ΔP current The current differential pressure reading is ΔP. previous The differential pressure reading is the value from the previous detection cycle, and Δt is the detection cycle.

[0013] Preferably, the determination condition for the damp adhesive dust is: the detected humidity data is greater than or equal to a preset humidity threshold, and the pressure difference change rate is less than a preset change rate threshold; The criteria for determining the dry and loose dust accumulation are: the detected humidity data is less than the preset humidity threshold, and the differential pressure change rate is greater than or equal to the preset change rate threshold.

[0014] A dust control method includes the following steps: S100: Real-time collection of humidity values ​​on the surface of the filter screen and pressure difference values ​​between the inside and outside of the filter screen; S200: When the differential pressure value exceeds the preset differential pressure threshold, calculate the rate of change of differential pressure per unit time; S300: If the humidity value is greater than or equal to the preset humidity threshold and the differential pressure change rate is less than the preset change rate threshold, it is determined to be a damp and adhesive type of dust accumulation. An enhanced cleaning process is executed. The enhanced cleaning process includes: controlling the drying unit to work for a preset time, then controlling the cleaning unit to switch to a hard cleaning brush to clean the filter screen, and controlling the fan device to switch to reverse blowing mode during the cleaning process. S400: If the humidity value is less than the preset humidity threshold, it is determined to be dry and loose dust accumulation. The routine cleaning process is executed. The routine cleaning process includes: controlling the cleaning actuator to switch to the soft cleaning brush to clean the filter screen, and controlling the fan device to switch to reverse blowing mode during the cleaning process. S500: After cleaning is completed, determine whether the differential pressure value has returned to below the preset differential pressure threshold. If not, generate a cleaning abnormality alarm.

[0015] Preferably, in the enhanced cleaning process, the preset time for controlling the drying of the components is dynamically calculated based on the difference between the humidity value and the target humidity value.

[0016] The beneficial effects of this invention are as follows: This invention, through the coordinated operation of a dust removal unit and a control module, utilizes a dynamic dust removal mechanism based on multi-parameter sensing. By employing a dual-threshold judgment model of humidity and differential pressure, it can accurately identify both damp, adhesive dust and dry, loose dust, employing a hard brush for enhanced cleaning and a soft brush for conventional cleaning, respectively. This achieves intelligent, adaptive self-cleaning of the filter, ensuring effective cleaning and maintaining stable internal temperature within the cabinet. Furthermore, this invention enables remote parameter monitoring and cleaning cycle setting, making it well-suited for communication base stations in remote areas with unstable power supply and difficult maintenance, significantly reducing the frequency of manual inspections and lowering manual cleaning and maintenance costs. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of an energy-saving fresh air conditioning cabinet according to the present invention; Figure 2 This is a schematic diagram of the structure between the dust removal unit and the filter screen in an energy-saving fresh air air conditioning cabinet according to the present invention; Figure 3 This is the present invention.Figure 2 A magnified view of a portion of point A in the middle; Figure 4 This is a block diagram showing the relationship between the modules in an energy-saving fresh air conditioning cabinet according to the present invention; Figure 5 This is a flowchart of a dust removal control method for an energy-saving fresh air conditioning cabinet according to the present invention.

[0018] In the diagram: 10. Cabinet body; 101. Air inlet duct; 102. Air outlet duct; 103. Dust collection trough; 20. Air conditioning module; 30. Fresh air module; 301. Filter screen; 302. Fan unit; 303. Soft cleaning brush; 304. Hard cleaning brush; 305. Moving frame; 306. Servo motor; 307. Transmission gear; 308. Transmission gear plate; 309. Electric push rod; 310. Heating element; 311. Miniature fan; 312. Infrared humidity sensor; 313. First pressure sensor; 314. Second pressure sensor; 40. Control module. Detailed Implementation

[0019] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0020] Please refer to the following: Figures 1 to 5 An energy-saving fresh air conditioning cabinet mainly includes a cabinet body 10, which is made of corrosion-resistant galvanized steel plate and internally divided into installation chambers for related equipment. An air outlet duct 102 is provided at the top of the cabinet body 10, while an air inlet duct 101 is provided at the bottom of the back of the cabinet body 10. Rainproof louvers are provided on the outside of the air inlet duct 101, and a dust collection tray 103 is provided at the bottom of the inner wall of the air inlet duct 101 to collect dust cleaned from the filter screen 301. A fresh air module 30, an air conditioning module 20, and a control module 40 are respectively installed in the corresponding chambers of the cabinet body 10.

[0021] The air conditioning module 20 adopts a small embedded air conditioning unit, which is installed inside the temperature control installation cavity of the cabinet body 10. The air conditioning module 20 has cooling and constant temperature functions, which can quickly reduce the internal temperature of the cabinet when the outdoor temperature is high and maintain the temperature stable within the range suitable for equipment operation. The air conditioning module 20 adopts a low power consumption design and is suitable for mountainous photovoltaic and mains power supply scenarios.

[0022] The fresh air module 30 is mainly used in conjunction with the air conditioning module 20 system. When there is a large temperature difference between the outside and the inside, it can actively introduce the low external temperature into the cabinet to achieve an auxiliary cooling function for the cabinet. The fresh air module 30 mainly includes a filter 301 installed inside the air inlet channel 101, a fan device 302 that can switch the airflow direction, and a dust removal unit. The fan device 302 is connected to one side of the filter 301 through a duct.

[0023] The dust removal unit is located on the side of the filter 301 near the rainproof louvers, and mainly includes a cleaning actuator, a drying actuator, and a parameter sensing element. Specifically, the cleaning actuator includes a movable frame 305 and a linear drive mechanism; the two ends of the movable frame 305 slide in cooperation with slide rails provided on both sides of the inner wall of the air inlet channel 101. A soft cleaning brush 303 and a hard cleaning brush 304 are slidably installed inside the movable frame 305, and the soft cleaning brush 303 and the hard cleaning brush 304 are distributed parallel and staggered vertically. The soft cleaning brush 303 is mainly used to remove dry and loose dust, while the hard cleaning brush 304 is used to remove caked and adhered dust. In this embodiment, the soft cleaning brush 303 and the hard cleaning brush 304 are preferably made of nylon material with good wear resistance. The Shore hardness of the soft cleaning brush 303 is preferably A40-A60, and the Shore hardness of the hard cleaning brush 304 is D70-D90. The linear drive mechanism is preferably an electric push rod 309, with its fixed end installed on the upper end of the inner wall of the air inlet channel 101, and its telescopic end connected to the top of the movable frame 305. By extending and retracting the electric push rod 309, the movable frame 305 can be driven to move linearly back and forth along the outer side of the filter screen 301.

[0024] In addition, to achieve automatic switching between the two cleaning brushes, the present invention also installs a switching drive mechanism inside the movable frame 305, which is mainly used to selectively contact the soft cleaning brush 303 or the hard cleaning brush 304 with the surface of the filter screen 301. In the embodiment, the switching drive mechanism mainly includes a servo motor 306, a transmission gear 307, and two transmission toothed plates 308. The servo motor 306 is a micro motor, which is fixedly installed in the middle position inside the movable frame 305, and its output end is connected to the transmission gear 307. The two transmission toothed plates 308 respectively mesh with the top and bottom of the transmission gear 307, and the two are parallel vertically and staggered horizontally. One end of the soft cleaning brush 303 and the hard cleaning brush 304 are respectively fixed to the corresponding transmission toothed plates 308. When switching between the soft cleaning brush 303 and the hard cleaning brush 304, the servo motor 306 rotates, which causes the transmission gear 307 to drive the two transmission gear plates 308 to move synchronously towards each other. This allows one of the cleaning brushes to retract into the moving frame 305, while the other cleaning brush extends out of the moving frame 305.

[0025] The drying component is mounted on the cleaning actuator and is used to blow hot air directionally onto the surface of the filter screen 301. Its function is to dry and solidify the damp and adhered dust, making it easier to remove with a hard brush later. The drying component specifically includes a PTC heating element 310 and a small centrifugal miniature fan 311. The air outlet of the miniature fan 311 is oriented towards the surface of the filter screen 301 through a flat air guide hood, ensuring that the hot air can be concentrated and blown onto the area cleaned by the brush. The hot air temperature of the drying component is generally controlled at 40-60 degrees Celsius.

[0026] The parameter sensing element is used to detect humidity data in the central area of ​​the windward side of the filter 301, as well as the pressure difference data between the inner and outer sides of the filter 301. It is responsible for collecting key environmental parameters for intelligent decision-making. It includes at least one humidity sensor, a first pressure sensor 313, and a second pressure sensor 314. The humidity sensor is installed in the central area of ​​the windward side of the filter 301 and is used to measure the humidity data of the windward side of the filter 301 in real time. Generally, a non-contact infrared humidity sensor 312 can be used. The first pressure sensor 313 and the second pressure sensor 314 are installed on the outer and inner sides of the filter 301, respectively. These two pressure sensors are used to measure the pressure difference between the two sides of the filter 301 in real time. The control module 40 reads the values ​​of these two pressure sensors in real time and calculates the difference to obtain the real-time pressure difference (ΔP) of the filter 301.

[0027] The control module 40 typically uses an industrial PLC, which is electrically connected to both the fresh air module 30 and the air conditioning module 20, serving as the control hub for the entire cabinet. It incorporates temperature control logic to control the operation of the fresh air module 30 and the air conditioning module 20, automatically switching their operating states based on the outdoor ambient temperature. It also includes dust removal control logic and related parameter thresholds for use with the dust removal unit, such as preset differential pressure threshold (120 Pa), preset humidity threshold (75% RH), preset rate of change threshold (5 Pa / min), and target humidity value (30% RH). These thresholds need to be determined based on the actual usage scenario and testing. By using this dust removal control logic in conjunction with the dust removal unit, the control module 40 enables the cabinet to adaptively select a suitable dust removal mode based on the current dust state on the filter surface, ensuring effective cleaning of the filter 301 and allowing the cabinet to ventilate normally.

[0028] The working process of the energy-saving fresh air conditioning cabinet provided by this invention is as follows: Temperature control process: When the outdoor temperature is high, the control module 40 activates the air conditioning module 20, and the small embedded air conditioning unit begins cooling, quickly reducing the internal temperature of the cabinet and maintaining it within the suitable operating range. When the outdoor temperature difference is large, the control module 40 switches to the fresh air module 30, and the fan device 302 starts, introducing low-temperature outdoor air into the cabinet through the air intake channel 101 to achieve auxiliary cooling of the cabinet. At the same time, the air conditioning module 20 can adjust its operating status as needed to maintain a stable internal temperature. During the temperature control process, the control module 40 monitors the outdoor ambient temperature in real time and automatically switches the operating status of the fresh air module 30 and the air conditioning module 20 according to the preset temperature control strategy to ensure that the cabinet can operate efficiently and stably under different environmental conditions.

[0029] Dust removal process: At the start of the dust removal process, the parameter sensing device collects the humidity value on the surface of the filter screen 301 and the pressure difference value between the inside and outside of the filter screen 301 in real time, and transmits these data to the control module 40. The control module 40 first determines whether the pressure difference value exceeds the preset pressure difference threshold. If it does not exceed the threshold, it continues monitoring; if it exceeds the threshold, it uses the formula: K=(ΔP) current -ΔP previous The rate of change of pressure difference per unit time is further calculated as ) / Δt, where ΔP current The current differential pressure reading is ΔP. previous The differential pressure reading from the previous detection cycle is Δt, where Δt is the detection cycle. Next, the control module 40 determines the type of dust accumulation based on the comparison results of the humidity value and the preset humidity threshold, and the comparison results of the differential pressure change rate and the preset change rate threshold. If the humidity value is greater than or equal to the preset humidity threshold, and the differential pressure change rate is less than the preset change rate threshold, it is determined to be moisture-adhesive dust accumulation. At this time, the control module 40 starts the enhanced cleaning process: Since the soft cleaning brush 303 is in contact with the filter screen 301 by default, the control module 40 first controls the switching drive mechanism to move the soft cleaning brush 303 away from the filter screen 301, so that its end is no longer in contact with the filter. At the same time, the hard cleaning brush 304 will move closer to the filter screen 301. Since the gap between the moving frame 305 and the filter screen 301 is sufficient, when neither the soft cleaning brush 303 nor the hard cleaning brush 304 is in contact with the filter screen 301, the switching drive mechanism stops driving. Then, the control module 40 controls the drying component to start, and at the same time controls the linear drive mechanism to extend downward, driving the moving frame 305 to gradually move downward, so that the drying component begins to dry. The surface of the filter screen 301 is dried sequentially until the preset drying time is reached. This preset time is dynamically calculated based on the difference between the humidity value and the target humidity value to ensure that the dust is fully dried. After drying, the drying device stops working, and the linear drive mechanism moves the moving frame 305 to the initial position (top of the filter screen 301). Then, the cleaning actuator drives the rigid cleaning brush 304 to contact the filter screen 301. The linear drive mechanism moves the moving frame 305 down again, so that the rigid cleaning brush 304 begins to scrape and clean the dust on the surface of the filter screen 301. During the cleaning process, the fan device 302 is switched to reverse blowing mode to enhance the cleaning effect. Some of the cleaned dust will fall directly into the dust collection groove 103 at the bottom of the filter screen 301, and some will be blown out directly by the fan device 302. If the humidity value is less than the preset humidity threshold, it is determined to be dry and loose dust. At this time, the control module 40 starts the normal cleaning process: controls the cleaning actuator to switch to the soft cleaning brush 303 to clean the filter screen 301, and also controls the fan device 302 to switch to reverse blowing mode during the cleaning process. After cleaning is completed, the control module 40 checks again whether the differential pressure value has recovered to below the preset differential pressure threshold. If it has not recovered, a cleaning abnormality alarm is generated to prompt maintenance personnel to check and handle the issue.

[0030] Through this series of intelligent dust removal processes, the energy-saving fresh air conditioning cabinet provided by this invention can ensure the permeability of the filter 301, thereby ensuring the ventilation efficiency of the cabinet and the normal operation of the internal equipment.

[0031] The embodiments of the present invention have been described above, but the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention, all of which are within the protection scope of the present invention.

Claims

1. An energy-saving fresh air conditioning cabinet, comprising: The cabinet body, the air conditioning module and the fresh air module disposed in the cabinet body, and the control module electrically connected to the fresh air module and the air conditioning module are characterized in that: the fresh air module includes a filter screen disposed at the air inlet channel of the cabinet body, a fan device that can switch the airflow direction and a dust removal unit. The dust removal unit includes: Cleaning actuators, including soft cleaning brushes and hard cleaning brushes, selectively bring either the soft or hard cleaning brush into contact with the filter surface. A drying component, which is mounted on the cleaning actuator, is used to blow hot air directionally onto the surface of the filter screen; The parameter sensing element is used to detect the humidity data of the central area of ​​the windward side of the filter, as well as the pressure difference data between the inside and outside of the filter. The control module is configured to: when the differential pressure detection value exceeds the preset differential pressure threshold, determine the dust accumulation status by combining the detected humidity data and differential pressure change rate; if it is determined to be damp and adhesive dust, control the drying unit to work for a preset time to dry the filter screen, then control the cleaning actuator to switch to a hard cleaning brush to clean the filter screen, and simultaneously control the fan device to switch to reverse blowing mode to make the airflow flow from the inside of the cabinet to the outside; if it is determined to be dry and loose dust, control the cleaning actuator to switch to a soft cleaning brush to clean the filter screen, and simultaneously control the fan device to switch to reverse blowing mode.

2. The energy-saving fresh air conditioning cabinet according to claim 1, characterized in that, The cleaning actuator includes a movable frame slidably disposed at the air inlet channel of the cabinet body, a linear drive mechanism for driving the movable frame to reciprocate along the surface of the filter screen, and a switching drive mechanism disposed on the movable frame. The soft cleaning brush and the hard cleaning brush are mounted side by side on the movable frame, and the switching drive mechanism is used to drive the soft cleaning brush or the hard cleaning brush to contact the surface of the filter screen.

3. The energy-saving fresh air conditioning cabinet according to claim 2, characterized in that, The switching drive mechanism includes a servo motor, a transmission gear connected to the output end of the servo motor, and two parallel transmission gear plates. The transmission gear meshes with the two first transmission gear plates respectively, and the two transmission gear plates are connected to a soft cleaning brush and a hard cleaning brush respectively.

4. The energy-saving fresh air conditioning cabinet according to claim 2, characterized in that, The linear drive mechanism is an electric push rod, the telescopic end of which is fixedly connected to one side of the mobile frame.

5. An energy-saving fresh air conditioning cabinet according to claim 2, characterized in that, The drying component includes an electric heating element and a miniature fan mounted on a movable frame, with the air outlet of the miniature fan facing the surface of the filter screen.

6. The energy-saving fresh air conditioning cabinet according to claim 1, characterized in that, The parameter sensing device includes a non-contact infrared humidity sensor disposed in the center area of ​​the windward side of the filter, and a first pressure sensor and a second pressure sensor disposed on the outer and inner sides of the filter.

7. The energy-saving fresh air conditioning cabinet according to claim 1, characterized in that, The control module calculates the differential pressure change rate K using the following formula: K=(ΔP current -ΔP previous ) / Δt; Where, ΔP current The current differential pressure reading is ΔP. previous The differential pressure reading is the value from the previous detection cycle, and Δt is the detection cycle.

8. The energy-saving fresh air conditioning cabinet according to claim 1, characterized in that, The criteria for determining the moisture-adhesive dust accumulation are: the detected humidity data is greater than or equal to a preset humidity threshold, and the differential pressure change rate is less than a preset change rate threshold. The criteria for determining the dry and loose dust accumulation are: the detected humidity data is less than the preset humidity threshold, and the differential pressure change rate is greater than or equal to the preset change rate threshold.

9. A dust control method, characterized in that, Using the energy-saving fresh air conditioning cabinet as described in any one of claims 1-8 includes the following operating steps: S100: Real-time collection of humidity values ​​on the surface of the filter screen and pressure difference values ​​between the inside and outside of the filter screen; S200: When the differential pressure value exceeds the preset differential pressure threshold, calculate the rate of change of differential pressure per unit time; S300: If the humidity value is greater than or equal to the preset humidity threshold and the differential pressure change rate is less than the preset change rate threshold, it is determined to be a damp and adhesive type of dust accumulation. An enhanced cleaning process is executed. The enhanced cleaning process includes: controlling the drying unit to work for a preset time, then controlling the cleaning unit to switch to a hard cleaning brush to clean the filter screen, and controlling the fan device to switch to reverse blowing mode during the cleaning process. S400: If the humidity value is less than the preset humidity threshold and the differential pressure change rate is greater than or equal to the preset change rate threshold, it is determined to be dry and loose dust accumulation. The routine cleaning process is executed. The routine cleaning process includes: controlling the cleaning actuator to switch to the soft cleaning brush to clean the filter screen, and controlling the fan device to switch to reverse blowing mode during the cleaning process. S500: After cleaning is completed, determine whether the differential pressure value has returned to below the preset differential pressure threshold. If not, generate a cleaning abnormality alarm.

10. A dust control method according to claim 9, characterized in that, In the enhanced cleaning process, the preset time for controlling the drying of the components is dynamically calculated based on the difference between the humidity value and the target humidity value.

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