Air quality detection device for environment and detection method thereof

Abstract

The invention relates to the technical field of environmental air detection, in particular to an environmental air quality detection device and a detection method thereof.The environmental air quality detection device comprises a base, and a case is fixedly mounted at the top of the base. Through the dual protection mechanism of the air inlet mechanism and the cleaning module, the air quality detection accuracy can be effectively guaranteed, in the specific detection period, induced draft fan blades rotate forwards to form negative pressure to suck air, an exhaust window assists in exhausting air, it is ensured that airflow is stable, and after a detection task is completed, an automatic cleaning program of the air inlet mechanism is started; the cleaning frame and the front cleaning group cooperatively operate to scrape dust on the inner walls of the induced draft fan blades and the air inlet pipe and prevent residual dust from falling off and being mixed into air in subsequent detection, meanwhile, the cleaning module continuously sprays, and under the action of countercurrent air driven by reverse rotation of the induced draft fan blades, cleaning liquid fully covers the air inlet pipe and the induced draft fan blades and dissolves dust and oil stains, so that secondary pollution is avoided; and air entering the case is ensured to be clean, so that real and reliable detection data is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of ambient air detection, and in particular to an ambient air quality detection device and a detection method thereof. Background Art

[0002] As environmental pollution becomes increasingly severe, ambient air quality testing has become a key component in ecological monitoring, urban planning, and public health. Air quality monitoring devices provide real-time data support for environmental governance and decision-making by monitoring various air pollutants, particulate matter concentrations, and other indicators. However, existing air quality monitoring devices, in practical applications, are limited by structural design and inadequate cleaning and maintenance mechanisms, resulting in numerous technical deficiencies that affect detection accuracy. These deficiencies are as follows: On the one hand, in the gas sampling system of the existing detection device, the air circulation pipes and fan blades are extremely susceptible to contamination by dust particles. During the operation of the device, dust particles suspended in the air enter the detection device with the airflow, adhere to and accumulate on the inner wall of the pipe and the surface of the fan blades. As the use time increases, these dust particles gradually form stubborn stains. Moreover, when the air in different environments is subsequently tested, due to factors such as airflow disturbance and equipment vibration, the dust particles on the surface of the pipes and fan blades are very likely to fall off and mix with the gas to be tested. This situation will cause serious deviations in the test results, and it is impossible to truly reflect the air quality status of the target environment. For example, in the detection of clean environments, the detached dust particles may be mistakenly identified as pollutants in the environment, resulting in inflated data and misleading the environmental quality assessment conclusions. On the other hand, the existing detection devices have obvious loopholes in the cleaning and maintenance links. The current cleaning solutions often focus on the cleaning of fan blades, removing dust on the surface of the blades by manual wiping, mechanical vibration or air flow blowing. However, the cleaning of ventilation ducts is often overlooked. As the main channel for gas circulation, once the inner wall of the ventilation duct is covered with dust, it will not only change the flow field characteristics inside the duct and affect the uniform flow of gas, resulting in the sampled gas being unable to truly represent the ambient air, but also may cause the dust remaining in the duct to continue to fall off in subsequent tests, causing continuous interference to the test results. In the long run, the accumulation of dust in the duct will cause problems such as microbial growth and odor generation, further worsening the detection environment and seriously reducing the detection accuracy and reliability of the air quality detection device. In summary, the existing environmental air quality detection device is difficult to meet the needs of high-precision and continuous air quality monitoring due to dust residue and imperfect cleaning and maintenance mechanisms, so it needs to be improved and designed. Summary of the Invention

[0003] In order to improve the detection accuracy during the application of existing technologies, the present application provides an environmental air quality detection device and a detection method thereof.

[0004] The present application provides an environmental air quality detection device and detection method thereof, which adopts the following technical solution: comprising a base, a chassis fixedly mounted on the top of the base, an air inlet mechanism fixedly mounted on the middle portion of the front of the chassis, a detection mechanism fixedly mounted on the top of the base, a touch screen fixedly connected to the upper end of one side of the front of the chassis, an exhaust window opened at the lower end of the back of the base, and a protective net provided inside the exhaust window; The detection mechanism includes a top cover, which covers the top of the chassis. A fixed arm is fixedly installed in the middle of the back side of the top cover, and the lower end of the fixed arm is threadedly connected to a mounting screw. An inner box body is fixedly installed at the bottom of the top cover, and a battery and a main controller are fixedly installed inside the inner box body. An air quality detection sensor is fixedly installed at the bottom of the inner box body, and a cleaning module is fixedly installed on one side of the top of the top cover, and the cleaning end of the cleaning module is arranged on the front side of the air quality detection sensor.

[0005] Optionally, the end of the mounting screw passes through the fixed arm, and a limiting hole is opened in the middle of the upper end of the back of the chassis. The end of the mounting screw is inserted into the inside of the limiting hole. The mounting screw is set as a hand-tightened screw. Mounting holes are opened at the four corners of the top of the base. The mounting holes are set as countersunk holes. A bridge handrail is fixedly installed on one side of the top of the top cover, and the outer surface of the bridge handrail is fixedly connected to a non-slip armrest cover.

[0006] Optionally, the air intake mechanism includes an air intake pipe, a mounting bracket is fixedly installed at the inner rear end of the air intake pipe, an air induction assembly is fixedly installed at the inner middle part of the mounting bracket, a front cleaning group is movably installed at the inner front end of the air intake pipe, a driving assembly is fixedly installed at the top rear side of the air intake pipe, the movable end of the driving assembly and the front cleaning group are connected by transmission, and dust cleaning and discharge troughs are provided at the front and rear ends of the bottom of the air intake pipe.

[0007] Optionally, the induced draft assembly includes a first motor, which is fixedly mounted on the inner middle part of the mounting frame, an encoder is provided at the output shaft of the first motor, the output end of the first motor passes through the mounting frame and is fixedly mounted with a rotating shaft, the outer surface of the rotating shaft is fixedly mounted with induced draft fan blades arranged in a ring at equal intervals, the front end of the outer surface of the rotating shaft is fixedly mounted with a connecting frame arranged in a ring at equal intervals, a fixing ring is fixedly mounted on the outer side of the connecting frame, and a cleaning brush group is fixedly connected to the outer side of the fixing ring at equal intervals.

[0008] Optionally, the drive assembly includes a top shell, which is fixedly mounted on the top rear end of the air inlet duct, a guide rail is fixedly mounted on the inner rear side of the top shell, a second motor is fixedly mounted on the top rear side of the top shell, an output end of the second motor passes through the top shell and is fixedly mounted with a screw, the screw is rotatably connected to the inside of the guide rail, the outer surface of the screw is threadedly connected to a slider, the slider is slidably connected to the inside of the guide rail, the front end of the slider is fixedly connected to a connecting arm, the outer end of the connecting arm is fixedly mounted with a cleaning frame, the inside of the cleaning frame is fixedly mounted with an inner cleaning brush, the cleaning frame is sleeved on the outer surface of an induced fan blade, and the inner side of the inner cleaning brush is fitly connected to the outer surface of the induced fan blade.

[0009] Optionally, the front cleaning group includes an inner ring groove, which is opened in the middle of the air inlet pipe, and the inner ring groove is rotatably connected to a slip ring, a cross is fixedly installed on the inner side of the slip ring, and a connecting shaft is fixedly installed in the middle of the cross, and the front end of the outer surface of the connecting shaft is connected with connecting rods arranged in a ring shape at equal intervals, and the outer end of the connecting rod is also fixedly installed with a cleaning brush group, and the rear end of the connecting shaft is fixedly installed with a transmission group, and the transmission group and the cleaning frame are transmission connected.

[0010] Optionally, the transmission group includes a gear and a connecting rod, the gear is fixedly mounted on the rear end of the connecting shaft, the connecting rod is fixedly mounted on the front of the cleaning frame, a rack is fixedly mounted on the middle of the outer surface of the connecting rod, the gear and the rack are meshed and connected, a supporting rail is fixedly mounted on the middle of the inner front side of the top shell, the internal sliding connection of the supporting rail is connected to a supporting block, and the back side of the supporting block is fixedly connected to the front end of the connecting rod.

[0011] Optionally, the cleaning module includes a fixed plate, which is fixedly installed on the top side of the top cover, and a cleaning liquid tank body is fixedly installed on one side of the fixed plate. The top of the cleaning liquid tank body is fixedly connected to a liquid inlet pipe, and the top of the liquid inlet pipe is threadedly connected to a sealing screw cap. A water pump is fixedly installed on the bottom of the cleaning liquid tank body, and the input end of the water pump is connected to the interior of the cleaning liquid tank body. An annular tube is fixedly installed on the output end of the water pump, and the annular tube is arranged in the middle of the front of the air quality detection sensor. Atomizing nozzles are fixedly installed on the side of the annular tube close to the air inlet pipe in an equidistant manner.

[0012] Optionally, the cleaning brush group includes a scraper, and the scrapers of the cleaning brush group located on the air induced assembly are arranged in a ring shape with equal intervals and fixedly mounted on the outside of the fixed ring, and the scraper of the cleaning brush group located on the front cleaning group is fixedly mounted on the outer end of the connecting rod, and the outer side of the scraper is fitly connected to the inner wall of the air inlet pipe, and both sides of the scraper are fixedly connected with a bending arm, and the outer side of the bending arm is fixedly connected with a cleaning brush plate, and the outer side of the cleaning brush plate is fitly connected to the inner wall of the air inlet pipe.

[0013] A method for using an environmental air quality detection device comprises the following steps: Step 1: Start the test: Start the first motor, drive the shaft to drive the fan blades to rotate forward, so that negative pressure is formed inside the air inlet duct, and external air is sucked into the chassis. The air quality detection sensor detects the air quality. During the detection process, the air is assisted by the exhaust window. Step 2: Cleaning the induced draft fan blades: After the inspection task is completed, the automatic cleaning program of the air inlet mechanism is started, and the operator starts the cleaning program on the touch screen at the same time. The second motor drives the screw to rotate, and the slider moves linearly along the screw under the guidance of the guide rail. The connecting arm drives the cleaning frame to move and sleeve on the outer surface of the induced draft fan blades; during this period, the water pump extracts the cleaning liquid from the cleaning liquid tank and transports it to the annular tube. The atomizing nozzle continuously sprays the cleaning liquid into the air inlet pipe. The second motor runs alternately in forward and reverse directions, and the internal cleaning brush fits the induced draft fan blades and moves up and down to scrape off dust and impurities on the surface of the induced draft fan blades; Step 3: Cleaning the front of the air inlet duct: When the cleaning frame moves, the rack on its connecting rod drives the gear at the rear end of the front cleaning group's coupling to rotate, causing the coupling, cross, slip ring and other components to rotate. The scraper and cleaning brush of the front cleaning group rotate along the inner wall of the air inlet duct. With the cooperation of the continuous spray of the cleaning module, the dust on the duct wall is scraped and cleaned, and the dust is discharged through the dust cleaning discharge chute; Step 4: Clean the rear of the air inlet mechanism. After cleaning the front of the air inlet duct, the second motor drives the rack upward and retracts it into the top housing. The first motor is then activated to drive the shaft, causing the connecting frame to rotate the cleaning brush assembly on the outside of the fixed ring. The cleaning module continues to operate, and the scraper and cleaning brush plate, under the action of the atomized cleaning fluid, scrape and clean the inner wall of the rear of the air inlet duct. Dust is discharged through the rear cleaning discharge chute. Step 5: Disassembly and maintenance. After cleaning, twist the installation screw to disengage its end from the limit hole. At this time, pull the bridge handrail to open the top cover, then unplug the power connectors of the first motor and the second motor, and then remove the top cover as a whole for comprehensive inspection and maintenance.

[0014] In summary, this application has the following beneficial technical effects: This device can effectively ensure the accuracy of air quality detection through the dual protection mechanism of the air intake mechanism and the cleaning module. During the specific detection period, the induced draft fan blades rotate forward to form a negative pressure to inhale air, and the exhaust window assists in exhausting air to ensure stable airflow. After the detection task is completed, the automatic cleaning program of the air intake mechanism is started, and the cleaning frame and the front cleaning group work together to scrape off the induced draft fan blades and the dust on the inner wall of the air inlet duct to prevent residual dust from falling off and mixing with the air during subsequent detection. At the same time, the cleaning module continues to spray, and under the action of the countercurrent air driven by the reverse rotation of the induced draft fan blades, the cleaning liquid fully covers the air inlet duct and induced draft fan blades, dissolving dust and oil, avoiding secondary pollution, and ensuring that the air entering the chassis is clean, thereby ensuring that the detection data is true and reliable; This device adopts a highly automated cleaning design, which can significantly reduce manual maintenance costs and workload. During specific application, the operator only needs to start the cleaning program on the touch screen. The second motor of the drive component can drive the lead screw, slider and other components to control the cleaning frame to automatically clean the fan blades, and the front cleaning group is linked to rotate to scrape the inner wall of the air inlet duct. The cleaning module runs synchronously, and the atomizing nozzle evenly sprays the cleaning liquid. Combined with mechanical cleaning to enhance the decontamination effect, the dust and residual cleaning liquid generated by cleaning are automatically discharged through the dust cleaning discharge chute. The entire cleaning process does not require manual disassembly, realizing full process automation, greatly improving the equipment operation and maintenance efficiency, and effectively extending the equipment service life; The various components of this device work closely together to achieve deep cleaning of the air intake system. In the air intake mechanism, the driving component, cleaning component and induced draft component work together to perform dead-angle cleaning from the induced draft fan blades to the front and back of the air intake duct. The cleaning module and the air intake mechanism cleaning are started synchronously. Under the dual effects of air backflow and mechanical scraping, the atomized cleaning liquid fully penetrates into all parts of the equipment and effectively dissolves stubborn stains. Through the linkage operation of mechanical scraping and liquid cleaning, the dust and dirt in the air intake system are thoroughly removed, and the air intake channel is kept clean and unobstructed, providing a clean and stable air intake environment for subsequent air quality detection, reducing the potential interference of dust on the test results. When inspecting and maintaining the air quality detection sensor, you only need to twist the hand-tightening installation screw to quickly disassemble and install the top cover and disassemble and install the various electronic components on its top for maintenance, which is convenient for its overall rapid inspection and cleaning, and can ensure the accuracy of subsequent detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the embodiment of the present application; Figure 2 This is a schematic diagram of the rear view structure in the split state in an embodiment of the present application; Figure 3 This is a schematic diagram of the front structure of the detection mechanism in the embodiment of the present application; Figure 4 This is a schematic diagram of the rear view structure of the detection mechanism in the embodiment of the present application; Figure 5 This is a schematic diagram of the internal rear view structure of the air intake mechanism in an embodiment of the present application; Figure 6 This is a schematic diagram of the front structure of the interior of the air inlet mechanism in an embodiment of the present application; Figure 7 This is a schematic diagram of the structure of the front cleaning group in the embodiment of the present application; Figure 8 This is a schematic diagram of the structure of the drive assembly in an embodiment of the present application; Figure 9 This is a schematic diagram of the combined state structure of the front cleaning group and the driving group in the embodiment of the present application; Figure 10This is a schematic diagram of the internal structure of the air inlet duct in an embodiment of the present application; Figure 11 In the embodiment of this application Figure 8 A is an enlarged structural diagram of FIG.

[0016] Figure numerals: 1, base; 2, chassis; 3, air inlet mechanism; 31, air inlet pipe; 32, mounting frame; 33, air induction assembly; 331, first motor; 332, rotating shaft; 333, air induction fan blade; 334, connecting frame; 335, fixing ring; 34, front cleaning group; 341, inner ring groove; 342, slip ring; 343, cross; 344, connecting shaft; 345, connecting rod; 346, transmission group; 3461, gear; 3462, connecting rod; 3463, rack; 3464, supporting rail; 3465, supporting block; 35, driving assembly; 351, top shell; 352, guide rail; 353, second motor; 354, screw; 35 5. Slider; 356. Connecting arm; 357. Cleaning frame; 358. Internal cleaning brush; 36. Dust removal chute; 37. Cleaning brush assembly; 371. Scraper; 372. Bending arm; 373. Cleaning brush plate; 4. Touch screen; 5. Detection mechanism; 51. Top cover; 52. Fixed arm; 53. Mounting screw; 54. Inner box; 55. Air quality detection sensor; 56. Cleaning module; 561. Fixed plate; 562. Cleaning liquid tank; 563. Liquid inlet pipe; 564. Sealing screw cap; 565. Water pump; 566. Ring tube; 567. Atomizing nozzle; 57. Limiting hole; 58. Bridge handrail; 6. Exhaust window; 7. Mounting hole. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-11 This application is described in further detail.

[0018] The present application discloses an environmental air quality detection device and a detection method thereof. Figure 1-11 As shown, it includes a base 1, a chassis 2 is fixedly mounted on the top of the base 1, an air inlet mechanism 3 is fixedly mounted on the middle part of the front of the chassis 2, a detection mechanism 5 is fixedly mounted on the top of the base 1, a touch screen 4 is fixedly connected to the upper end of one side of the front of the chassis 2, an exhaust window 6 is opened at the lower end of the back of the base 1, and a protective net is provided inside the exhaust window 6; The detection mechanism 5 includes a top cover 51, which covers the top of the chassis 2. A fixed arm 52 is fixedly installed in the middle of the back of the top cover 51, and the lower end of the fixed arm 52 is threadedly connected to a mounting screw 53. An inner box body 54 is fixedly installed at the bottom of the top cover 51, and a battery and a main controller are fixedly installed inside the inner box body 54. An air quality detection sensor 55 is fixedly installed at the bottom of the inner box body 54. A cleaning module 56 is fixedly installed on one side of the top of the top cover 51, and the cleaning end of the cleaning module 56 is arranged on the front of the air quality detection sensor 55. When the air quality detection device is in operation, the various components are divided into different tasks and cooperate in an orderly manner. The first motor 331 of the induced air component 33 in the air inlet mechanism 3 drives the induced air. The fan blades 333 rotate, forming a negative pressure to inhale the outside air. The front cleaning group 34 and the cleaning brush group 37 on the air inlet assembly 33 synchronously intercept and clean the dust in the air inlet pipe 31. The air enters the chassis 2 after preliminary dust removal. The air quality detection sensor 55 in the detection mechanism 5 detects the air entering the chassis 2 in real time and transmits the detection data to the main controller. The main controller processes and analyzes the data and displays the detection results through the touch screen 4. The exhaust window 6 assists in exhausting the air in the chassis 2 to ensure stable airflow. When the detection is completed or cleaning is required, the operator starts the cleaning program on the touch screen 4, and the water pump 565 of the cleaning module 56 draws the cleaning liquid in the cleaning liquid tank 562 out through the annular The tube 566 and the atomizing nozzle 567 spray toward the air quality detection sensor 55 for cleaning; at the same time, the driving component 35 of the air inlet mechanism 3 is started, and the second motor 353 drives the screw rod 354 to rotate, so that the slider 355 and the connected cleaning frame 357 move, and the internal cleaning brush 358 in the cleaning frame 357 cleans the fan blades 333, and the cleaning frame 357 moves through the meshing of the rack 3463 and the gear 3461 to drive the front cleaning group 34 to rotate, and clean the inner wall of the air inlet pipe 31. The cleaned dust is discharged through the dust cleaning discharge chute 36 to ensure that the interior of the detection device is clean and ready for the next accurate detection. The air quality detection sensor 55 of this device can be selected from different models according to the detection requirements. Among the sensors used in this device, the laser scattering principle is often used to detect particulate matter concentration using Panteng Technology PMSA003I and Sharp GP2Y1010AU0F; for detecting gaseous pollutants, Weisheng Technology MQ-7 can be used to detect carbon monoxide, Weisheng Technology ZE08-CH2O can be used to detect formaldehyde, and Altair 4 electrochemical sensor 4NO2 can be used to detect nitrogen dioxide; DHT22 and SHT35 are commonly used for temperature and humidity detection; in addition, Sensirion SGP30 can be used to detect volatile organic compounds (VOCs). The specific application of the sensor can be adapted according to the specific detection requirements. At the same time, multiple sensors can be installed at the bottom of the top cover 51 to meet a variety of different detection requirements.

[0019] Please refer to Figures 1-11The air intake mechanism 3 includes an air intake pipe 31, a mounting bracket 32 ​​is fixedly installed on the inner rear end of the air intake pipe 31, an air induction component 33 is fixedly installed on the inner middle part of the mounting bracket 32, a front cleaning group 34 is movably installed on the inner front end of the air intake pipe 31, a driving component 35 is fixedly installed on the top rear side of the air intake pipe 31, the moving end of the driving component 35 and the front cleaning group 34 are transmission-connected, and dust cleaning and discharge grooves 36 are provided at the front and rear ends of the bottom of the air intake pipe 31, and the air induction component 33 includes a first motor 331, which is fixedly installed on the inner middle part of the mounting bracket 32, and an encoder is provided at the output shaft of the first motor 331. The output end of the first motor 331 passes through the mounting bracket 32. The mounting frame 32 is fixedly mounted with a rotating shaft 332, and fan blades 333 are fixedly mounted on the outer surface of the rotating shaft 332 in a ring-shaped arrangement at equal intervals. A connecting frame 334 is fixedly mounted on the front end of the outer surface of the rotating shaft 332 in a ring-shaped arrangement at equal intervals. A fixing ring 335 is fixedly mounted on the outer side of the connecting frame 334, and a cleaning brush group 37 is fixedly connected to the outer side of the fixing ring 335 at equal intervals. During the application of this device, when the air intake mechanism 3 is in operation, the first motor 331 is started as a power source to drive the rotating shaft 332 to rotate, so that the fan blades 333 rotate at high speed, and aerodynamic principles are used to form a negative pressure in the air inlet pipe 31 to suck in the outside air. The knurled part at the output shaft of the first motor 331 The encoder monitors the rotation speed in real time to ensure the stability of the induced air. While the induced air fan blades 333 rotate, the connecting frame 334, the fixing ring 335 and the cleaning brush group 37 at the front end of the rotating shaft 332 rotate synchronously. The scraper 371 and the cleaning brush plate 373 in the cleaning brush group 37 fit the inner wall of the air inlet pipe 31, and can scrape off the dust attached to the inner wall of the air inlet pipe 31 during the air flow process to achieve preliminary dust removal. The front cleaning group 34 is initially in a stationary state. When the air inlet pipe 31 needs to be cleaned, the driving assembly 35 is started, and the second motor 353 on the top rear side drives the screw rod 354 to rotate, and the slider 355 threadedly connected to the screw rod 354 moves linearly under the guidance of the guide rail 352 , the cleaning frame 357 is driven to move by the connecting arm 356. When the cleaning frame 357 moves, the rack 3463 on the front connecting rod 3462 engages with the gear 3461 at the rear end of the connecting shaft 344 of the front cleaning group 34, driving the slip ring 342, cross 343, connecting shaft 344 and connecting rod 345 of the front cleaning group 34 to rotate, so that the scraper 371 and cleaning brush plate 373 on the front cleaning group 34 rotate in contact with the inner wall of the air inlet pipe 31, and deeply cleans the front of the air inlet pipe 31. The cleaned dust is discharged by gravity through the dust cleaning discharge troughs 36 at the front and rear ends of the bottom of the air inlet pipe 31, ensuring the cleanliness of the air inlet channel and maintaining good air intake performance and detection accuracy.

[0020] Please refer to Figures 1-4The end of the mounting screw 53 passes through the fixed arm 52, and a limiting hole 57 is provided in the middle of the upper back end of the chassis 2. The end of the mounting screw 53 is inserted into the inside of the limiting hole 57. The mounting screw 53 is set as a hand-tightening screw. Mounting holes 7 are provided at the four corners of the top of the base 1. The mounting holes 7 are set as countersunk holes. A bridge handrail 58 is fixedly installed on one side of the top of the top cover 51. The outer surface of the bridge handrail 58 is fixedly connected with a non-slip handrail cover. In this air quality detection device, the connection between the top cover 51 and the chassis 2 is realized by the mounting screw 53. The hand-tightening screw is convenient for the operator to perform disassembly and assembly operations with his bare hands. During installation, the end of the mounting screw 53 passes through the fixed arm 52 and is inserted into the limiting hole in the middle of the upper back end of the chassis 2. By rotating and tightening the screw in the hole 57, the top cover 51 can be firmly installed on the top of the chassis 2, ensuring that the battery, main controller and air quality detection sensor 55 and other components inside the detection mechanism 5 are in a closed and safe space. The countersunk holes designed at the four corners of the top of the base 1 can be used with screws to fix the entire device on different planes to ensure that the device remains stable during the detection process and avoids the detection accuracy being affected by shaking. In addition, the outer surface of the bridge handrail 58 on one side of the top of the top cover 51 is wrapped with a non-slip handrail cover. When the device needs to be transported or moved, the operator can hold the handrail. The non-slip material can increase friction and prevent hands from slipping, making it easy to carry the device labor-savingly and safely, thereby improving the convenience and flexibility of using the device.

[0021] Please refer to Figure 5-10The driving assembly 35 includes a top shell 351, which is fixedly mounted on the top rear end of the air inlet pipe 31. A guide rail 352 is fixedly mounted on the rear side of the top shell 351. A second motor 353 is fixedly mounted on the top rear side of the top shell 351. The output end of the second motor 353 passes through the top shell 351 and is fixedly mounted with a screw rod 354. The screw rod 354 is rotatably connected to the inside of the guide rail 352. The outer surface of the screw rod 354 is threadedly connected to a slider 355. The slider 355 is slidably connected to the inside of the guide rail 352. The front of the slider 355 The end is fixedly connected to a connecting arm 356, the outer end of the connecting arm 356 is fixedly installed with a cleaning frame 357, the interior of the cleaning frame 357 is fixedly installed with an inner cleaning brush 358, the cleaning frame 357 is sleeved on the outer surface of an induced fan blade 333, the inner side of the inner cleaning brush 358 is in contact with the outer surface of the induced fan blade 333, and during the application of the device, when the driving component 35 is working, the second motor 353 is used as the power core. When the cleaning instruction is received and started, the output end of the second motor 353 drives the screw rod 354 to rotate. Since the screw rod 354 and the slider 355 are threadedly connected, and the slider 355 is guided by the guide rail 352 on the rear side of the top shell 351, the rotational movement of the screw rod 354 is converted into a linear movement of the slider 355 along the guide rail 352. When the slider 355 slides in the guide rail 352, the connecting arm 356 fixed at the front end drives the cleaning frame 357 to move synchronously. The cleaning frame 357 is sleeved on the outer surface of the induced fan blade 333, and the internal cleaning brush 358 fixed therein is in close contact with the outer surface of the induced fan blade 333. As the slider 355 moves linearly, the cleaning frame 357 slides axially along the induced draft fan blade 333, and the internal cleaning brush 358 moves up and down while keeping in contact with the induced draft fan blade 333, so as to scrape off the dust, impurities and other stains attached to the surface of the induced draft fan blade 333. By controlling the second motor 353 to run alternately in forward and reverse directions, the cleaning frame 357 can move back and forth on the induced draft fan blade 333 for cleaning, thereby ensuring that all parts of the induced draft fan blade 333 can be effectively cleaned, thereby maintaining the efficient operation of the induced draft component 33 and the clean state of the air intake mechanism 3.

[0022] Please refer to Figures 1-4The cleaning module 56 includes a fixed plate 561, which is fixedly installed on one side of the top of the top cover 51. A cleaning liquid tank body 562 is fixedly installed on one side of the fixed plate 561. The top of the cleaning liquid tank body 562 is fixedly connected with a liquid inlet pipe 563. The top of the liquid inlet pipe 563 is threadedly connected with a sealing screw cover 564. A water pump 565 is fixedly installed at the bottom of the cleaning liquid tank body 562. The input end of the water pump 565 is connected to the interior of the cleaning liquid tank body 562. An annular tube 566 is fixedly installed on the output end of the water pump 565. The annular tube 566 is arranged in the middle of the front of the air quality detection sensor 55. The annular tube 566 is fixedly installed with atomizing nozzles arranged in a ring shape at equal intervals on one side close to the air inlet pipe 31. 567. During the application of this device, when its cleaning module 56 is in operation, the operator adds cleaning liquid to the cleaning liquid tank 562 through the liquid inlet pipe 563 and tightens the seal with the sealing screw cap 564. When the inside of the air inlet pipe 31 needs to be cleaned, the main controller sends an instruction to start the water pump 565. The water pump 565 extracts the cleaning liquid from the cleaning liquid tank 562 and transports it to the annular tube 566 through the pipeline. The annular tube 566 is arranged in the middle of the front of the air quality detection sensor 55. The atomizing nozzles 567 arranged at equal intervals on the side close to the air inlet pipe 31 use a special internal structure to atomize the cleaning liquid into fine droplets, which are evenly sprayed in every corner of the air inlet pipe 31 to improve its cleaning effect.

[0023] Please refer to Figure 5-Figure 6 and Figure 7-10The front cleaning group 34 includes an inner ring groove 341, which is opened in the middle of the air inlet pipe 31. The inner ring groove 341 is rotatably connected to a slip ring 342. A cross 343 is fixedly installed on the inner side of the slip ring 342. A connecting shaft 344 is fixedly installed in the middle of the cross 343. The front end of the outer surface of the connecting shaft 344 is connected to a connecting rod 345 at equal intervals in a ring shape. The outer end of the connecting rod 345 is also fixedly installed with a cleaning brush group 37. The rear end of the connecting shaft 344 is fixedly installed with a transmission group 346. The transmission group 346 is transmission-connected to the cleaning frame 357. The transmission group 346 includes a gear 3461 and a connecting rod 3462. 3461 is fixedly installed on the rear end of the connecting shaft 344, the connecting rod 3462 is fixedly installed on the front of the cleaning frame 357, and a rack 3463 is fixedly installed in the middle of the outer surface of the connecting rod 3462. The gear 3461 and the rack 3463 are meshed and connected. A supporting rail 3464 is fixedly installed in the middle of the front side of the top shell 351. The internal sliding connection of the supporting rail 3464 is connected to a supporting block 3465. The back of the supporting block 3465 is fixedly connected to the front end of the connecting rod 3462. The cleaning brush group 37 includes a scraper 371. The scrapers 371 of the cleaning brush group 37 are arranged in a ring at equal intervals on the air induced component 33 and are fixedly installed on the fixing ring 33. 5, the scraper 371 of the cleaning brush group 37 on the front cleaning group 34 is fixedly installed on the outer end of the connecting rod 345, the outer side of the scraper 371 is fitted with the inner wall of the air inlet pipe 31, and the two sides of the scraper 371 are fixedly connected with the bending arm 372, and the outer side of the bending arm 372 is fixedly connected with the cleaning brush plate 373. The outer side of the cleaning brush plate 373 is fitted with the inner wall of the air inlet pipe 31. During the application of this device, when the front cleaning group 34 is working, automatic cleaning is achieved through the transmission connection with the driving component 35. When the cleaning frame 357 in the driving component 35 moves along the screw rod 354 driven by the second motor 353, the cleaning frame The rack 3463 on the front connecting rod 3462 of 357 moves accordingly. Since the rack 3463 meshes with the gear 3461 at the rear end of the connecting shaft 344, the linear motion of the rack 3463 is converted into the rotational motion of the gear 3461, which in turn drives the connecting shaft 344 to rotate. When the connecting shaft 344 rotates, the cross 343 drives the slip ring 342 to rotate in the inner ring groove 341, and at the same time drives the connecting rod 345 and the cleaning brush assembly 37 at the outer end of the connecting rod 345 to rotate around the central axis of the air inlet duct 31. In the cleaning brush assembly 37, the outer side of the scraper 371 is in contact with the inner wall of the air inlet duct 31, and scrapes the inner wall of the air inlet duct 31 during rotation to remove dust.The cleaning brush plates 373 connected to the bent arms 372 on either side of the scraper 371 also conform to the pipe wall, repeatedly brushing the pipe wall to enhance the cleaning effect. The support rails 3464 and support blocks 3465 inside the top shell 351 cooperate to provide support and guidance for the connecting rod 3462, ensuring that the rack 3463 and gear 3461 are always in stable engagement, ensuring that the front cleaning group 34 operates smoothly during the transmission process. Together with the cleaning frame 357, they complete the comprehensive cleaning of the inner wall of the air inlet duct 31. The cleaned dust is discharged through the dust cleaning discharge chute 36 at the bottom of the air inlet duct 31.

[0024] A method for using an environmental air quality detection device comprises the following steps: Step 1: Start the test: Start the first motor 331, drive the shaft 332 to drive the fan blades 333 to rotate forward, so that negative pressure is formed inside the air inlet duct 31, and external air is sucked into the chassis 2. The air quality detection sensor 55 detects the air quality. During the detection process, the air is assisted in exhausting through the exhaust window 6; Step 2: Cleaning the induced draft fan blades 333: After the inspection task is completed, the automatic cleaning program of the air inlet mechanism 3 is started, and at the same time, the operator starts the cleaning program on the touch screen 4. The second motor 353 drives the screw 354 to rotate, and the slider 355 moves linearly along the screw 354 under the guidance of the guide rail 352. The connecting arm 356 drives the cleaning frame 357 to move and sleeve on the outer surface of the induced draft fan blades 333; during this period, the water pump 565 extracts the cleaning liquid in the cleaning liquid tank 562 and transports it to the annular tube 566, and the atomizing nozzle 567 continuously sprays the cleaning liquid into the air inlet pipe 31. The second motor 353 runs alternately in forward and reverse directions, and the internal cleaning brush 358 moves up and down in contact with the induced draft fan blades 333 to scrape off dust and impurities on the surface of the induced draft fan blades 333; Step 3: Cleaning the front of the air inlet duct 31: When the cleaning frame 357 moves, the rack 3463 on its connecting rod 3462 drives the gear 3461 at the rear end of the connecting shaft 344 of the front cleaning group 34 to rotate, causing the connecting shaft 344, the cross 343, the slip ring 342 and other components to rotate. The scraper 371 and the cleaning brush plate 373 of the front cleaning group 34 rotate along the inner wall of the air inlet duct 31. With the cooperation of the continuous spray of the cleaning module 56, the dust on the pipe wall is scraped and cleaned, and the dust is discharged through the dust cleaning discharge chute 36. Step 4: Clean the rear of the air inlet mechanism 3. After cleaning the front of the air inlet duct 31, the second motor 353 drives the rack 3463 upward and retracts it into the top housing 351. The first motor 331 is activated to drive the rotating shaft 332, causing the connecting frame 334 to rotate the cleaning brush assembly 37 on the outside of the fixing ring 335. The cleaning module 56 continues to operate. The scraper 371 and cleaning brush plate 373, under the action of the atomized cleaning fluid, scrape and clean the inner wall of the rear of the air inlet duct 31. Dust is discharged through the rear dust cleaning discharge chute 36. Step 5: Disassembly and maintenance. After cleaning, twist the installation screw 53 so that its end is out of the limit hole 57. At this time, pull the bridge armrest 58 to open the top cover 51, and then unplug the power connectors of the first motor 331 and the second motor 353. Then remove the top cover 51 as a whole for comprehensive inspection and maintenance.

[0025] The implementation principle of an environmental air quality detection device and its detection method according to an embodiment of the present application is as follows: during the application of the device, when performing detection, the first motor 331 can be started to drive the rotating shaft 332 to drive the fan blades 333 to rotate forward, at which time a negative pressure can be formed inside the air inlet pipe 31, and then the external air negative pressure can be sucked into the interior of the chassis 2 through the air inlet pipe 31, and then it can be detected by the air quality detection sensor 55. During the detection process, air can be assisted in exhaust through the exhaust window 6, thereby playing a better detection role. When the detection task of the detection device is completed, the automatic cleaning function can be performed by starting the automatic cleaning program of the air inlet mechanism 3. At this time, the second motor 353 in the driving component 35 starts to operate as the power source for the entire cleaning action. The output end of the second motor 353 drives the screw rod 354 to rotate. Since the screw rod 354 is connected to the slider 355 by a thread, and the slider 355 is guided by the guide rail 352, the rotational movement of the screw rod 354 is converted into the slider 355 moves linearly along the axis of the screw rod 354. At this time, the slider 355 slides inside the guide rail 352. The sliding of the slider 355 can prompt the connecting arm 356 to drive the cleaning frame 357 to move synchronously. During this period, since the first motor 331 is provided with an encoder, the encoder can detect the number of revolutions of the first motor 331, and then control the various fan blades 333 on the outer surface of the rotating shaft 332 to be stably vertically upward. At this time, the second motor 353 is started to drive the screw rod 354 to drive the cleaning frame 357. The movement can prompt the cleaning frame 357 to be sleeved on the outer surface of the induced fan blade 333, and the cleaning frame 357 slides on the outer surface of the induced fan blade. By starting the second motor 353 to run in a forward and reverse direction alternately, the internal cleaning brush 358 inside it can be caused to fit closely with the induced fan blade 333 and move up and down to brush, thereby achieving a better cleaning effect. It can be seen that when the cleaning frame 357 moves axially along the induced fan blade 333, the internal cleaning brush 358 can scrape off dust, impurities, etc. attached to the surface of the induced fan blade 333; At the same time, during the movement of the cleaning frame 357, it will also trigger the linkage cleaning of the front cleaning group 34. A rack 3463 is fixedly installed on the connecting rod 3462 on the front side of the cleaning frame 357. By locking the cleaning frame 357 to move up and down, the rack 3463 can be driven to move up and down. At this time, the rack 3463 is engaged with the gear 3461 at the rear end of the connecting shaft 344 of the front cleaning group 34. When the cleaning frame 357 moves, the rack 3463 drives the gear 3461 to rotate, thereby causing the connecting shaft 344, the cross 343, the slip ring 342 and other components to rotate synchronously, and the front cleaning group 34 is cleaned. The cleaning brush group 37 on the cleaning group 34 rotates with the connecting shaft 344, and the scraper 371 and the cleaning brush plate 373 therein are in contact with the inner wall of the air inlet pipe 31. During the rotation process, the scraper 371 continuously scrapes the inner wall of the air inlet pipe 31, and the cleaning brush plate 373 can be repeatedly brushed, thereby improving its cleaning effect. As the second motor 353 runs, it can drive the cleaning frame 357 and the inner cleaning brush 358 inside it to move back and forth on the fan blades 333 for cleaning. At the same time, its rack 3463 and gear 3461 are linked to synchronously drive the scraper 37 on the front cleaning group 34 1 and the cleaning scraper 371 stably brush and rub the inner wall of the air inlet pipe 31, which can play a good cleaning role inside the air inlet pipe 31, and then can clean up the dust deposited on the pipe wall and the fan blades. The cleaned dust moves to the bottom after being brushed, and is finally discharged through the dust cleaning and discharge troughs 36 opened at the front and rear ends of the bottom of the air inlet pipe 31, avoiding dust accumulation inside the air inlet mechanism 3 and ensuring the cleanliness and smooth flow of the air inlet channel. After the front end of the air inlet pipe 31 is cleaned, it is only necessary to start the second motor 353 to drive the rack 3463 to move upward. After the rack 3463 is retracted into the interior of the top shell 351, the first motor 331 is started to drive the rotating shaft 332 to drive the connecting frame 334 to rotate. The rotation of the connecting frame 334 can drive the cleaning brush group 37 on the outside of the fixed ring 335 to rotate. At this time, the cleaning brush plate 373 and the scraper 371 on the outside of the fixed ring 335 can be attached to the rear inner wall of the air inlet duct 31 to scrape and clean. The overall application can have a good automatic cleaning effect. The dust cleaned can also be discharged through the dust cleaning discharge chute 36 at the rear end, so that the overall cleaning effect of the device can be better. During the application of this device, its cleaning module 56 is mainly used to improve the cleaning effect and ensure its detection accuracy. The cleaning liquid tank 562 is fixedly installed on the top side of the top cover 51 through the fixing plate 561. When in use, cleaning liquid can be added to the tank through the liquid inlet pipe 563 and sealed by the sealing screw cap 564. When the air inlet pipe 31 and the induced fan blades 333 need to be cleaned and maintained, the operator starts the cleaning program on the touch screen 4. After receiving the instruction, the main controller controls the water pump 565 to start working; the water pump 565 extracts the cleaning liquid in the cleaning liquid tank 562 and transports it to the annular pipe 566 through the pipeline. The annular pipe 566 is installed around the middle position of the front of the air quality detection sensor 55, and the atomizing nozzles 567 arranged in a ring at equal intervals start working. The atomizing nozzle 567 uses the special internal structure to atomize the cleaning liquid into fine droplets, which are evenly sprayed toward the air inlet pipe 31 for spray cleaning. At this time, the first motor 331 is started to drive the induced fan blades 333 in the opposite direction. The rotation causes the air to flow back, and the cleaning mist can be blown stably into the inner wall of the air inlet duct 31 by the driving of the induced draft fan blades 333, and the atomized cleaning liquid can fully cover every corner of the surface of the air inlet duct 31 and the induced draft fan blades 333, dissolving and taking away the dust, oil and other pollutants attached to their surfaces. At this time, the driving component 35, the cleaning component and the induced draft component 33 inside the air inlet mechanism 3 are started for cleaning, which can cooperate with the cleaning brush group 37 and the internal cleaning plate to play a better cleaning role. After the cleaning is completed, the residual cleaning liquid and pollutants are discharged through the dust cleaning discharge chute 36 under the action of gravity. During the entire cleaning process, the automatic cleaning of the air inlet mechanism 3 and the cleaning module 56 cooperate with each other to clean the air inlet channel and the induced draft fan blades 333, reducing the risk of residual dust entering the interior of the chassis 2 due to vibration and falling off during different detection periods in the later stage, causing secondary pollution to the air quality detection sensor 55, and can further improve the detection accuracy of the equipment during the overall application.

[0026] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An environmental air quality detection device, characterized in that; The invention comprises a base (1), a chassis (2) is fixedly mounted on the top of the base (1), an air inlet mechanism (3) is fixedly mounted on the middle of the front of the chassis (2), a detection mechanism (5) is fixedly mounted on the top of the base (1), a touch screen (4) is fixedly connected to the upper end of one side of the front of the chassis (2), an exhaust window (6) is opened at the lower end of the back of the base (1), and a protective net is provided inside the exhaust window (6); The detection mechanism (5) comprises a top cover (51), the top cover (51) covers the top of the chassis (2), a fixed arm (52) is fixedly mounted on the middle of the back of the top cover (51), the lower end of the fixed arm (52) is threadedly connected to a mounting screw (53), an inner box (54) is fixedly mounted on the bottom of the top cover (51), a battery and a main controller are fixedly mounted inside the inner box (54), an air quality detection sensor (55) is fixedly mounted on the bottom of the inner box (54), and a cleaning module (56) is fixedly mounted on one side of the top of the top cover (51), and a cleaning end of the cleaning module (56) is arranged on the front of the air quality detection sensor (55).

2. The environmental air quality detection device according to claim 1, characterized in that: The end of the mounting screw (53) passes through the fixed arm (52), and a limiting hole (57) is provided in the middle of the upper end of the back of the chassis (2). The end of the mounting screw (53) is inserted into the inside of the limiting hole (57). The mounting screw (53) is set as a hand-tightening screw. Mounting holes (7) are provided at the four corners of the top of the base (1). The mounting holes (7) are set as countersunk holes. A bridge handrail (58) is fixedly installed on one side of the top of the top cover (51), and an anti-slip handrail cover is fixedly connected to the outer surface of the bridge handrail (58).

3. The environmental air quality detection device according to claim 1, characterized in that: The air inlet mechanism (3) comprises an air inlet pipe (31), a mounting frame (32) is fixedly mounted on the inner rear end of the air inlet pipe (31), an air induction assembly (33) is fixedly mounted on the inner middle part of the mounting frame (32), a front cleaning group (34) is movably mounted on the inner front end of the air inlet pipe (31), a driving assembly (35) is fixedly mounted on the top rear side of the air inlet pipe (31), a movable end of the driving assembly (35) and the front cleaning group (34) are connected in a transmission manner, and dust removal troughs (36) are provided at both the front and rear ends of the bottom of the air inlet pipe (31).

4. The environmental air quality detection device according to claim 3, characterized in that: The air induction assembly (33) comprises a first motor (331), the first motor (331) being fixedly mounted on the inner middle portion of the mounting frame (32), an encoder being provided at the output shaft of the first motor (331), the output end of the first motor (331) penetrating the mounting frame (32) being fixedly mounted with a rotating shaft (332), the outer surface of the rotating shaft (332) being fixedly mounted with air induction fan blades (333) arranged in a ring shape at equal intervals, the front end of the outer surface of the rotating shaft (332) being fixedly mounted with a connecting frame (334) arranged in a ring shape at equal intervals, the outer side of the connecting frame (334) being fixedly mounted with a fixing ring (335), and the outer side of the fixing ring (335) being fixedly connected with a cleaning brush group (37) at equal intervals.

5. The environmental air quality detection device according to claim 4, characterized in that: The driving assembly (35) includes a top shell (351), the top shell (351) is fixedly mounted on the top rear end of the air inlet pipe (31), a guide rail (352) is fixedly mounted on the inner rear side of the top shell (351), a second motor (353) is fixedly mounted on the top rear side of the top shell (351), an output end of the second motor (353) passes through the top shell (351) and is fixedly mounted with a screw rod (354), the screw rod (354) is rotatably connected to the inside of the guide rail (352), and the outer surface of the screw rod (354) is threaded. A slider (355) is connected, and the slider (355) is slidably connected to the inside of the guide rail (352). The front end of the slider (355) is fixedly connected to a connecting arm (356). The outer end of the connecting arm (356) is fixedly installed with a cleaning frame (357). The interior of the cleaning frame (357) is fixedly installed with an internal cleaning brush (358). The cleaning frame (357) is sleeved on the outer surface of an induced draft fan blade (333), and the inner side of the internal cleaning brush (358) is fitted and connected to the outer surface of the induced draft fan blade (333).

6. The environmental air quality detection device according to claim 5, characterized in that: The front cleaning group (34) includes an inner ring groove (341), the inner ring groove (341) is opened in the middle of the air inlet pipe (31), the inner ring groove (341) is rotatably connected to a slip ring (342), the inner side of the slip ring (342) is fixedly mounted with a cross (343), the middle part of the cross (343) is fixedly mounted with a connecting shaft (344), the front end of the outer surface of the connecting shaft (344) is connected with connecting rods (345) arranged in a ring shape at equal intervals, the outer end of the connecting rod (345) is also fixedly mounted with a cleaning brush group (37), the rear end of the connecting shaft (344) is fixedly mounted with a transmission group (346), and the transmission group (346) and the cleaning frame (357) are transmission-connected.

7. The environmental air quality detection device according to claim 6, characterized in that: The transmission group (346) includes a gear (3461) and a connecting rod (3462), wherein the gear (3461) is fixedly mounted on the rear end of the connecting shaft (344), and the connecting rod (3462) is fixedly mounted on the front face of the cleaning frame (357). A rack (3463) is fixedly mounted on the middle portion of the outer surface of the connecting rod (3462), and the gear (3461) and the rack (3463) are meshingly connected. A supporting rail (3464) is fixedly mounted on the middle portion of the inner front side of the top shell (351), and a supporting block (3465) is slidably connected to the interior of the supporting rail (3464), and the back of the supporting block (3465) is fixedly connected to the front end of the connecting rod (3462).

8. The environmental air quality detection device according to claim 7, characterized in that: The cleaning module (56) includes a fixing plate (561), which is fixedly mounted on one side of the top of the top cover (51); a cleaning liquid tank (562) is fixedly mounted on one side of the fixing plate (561); a liquid inlet pipe (563) is fixedly connected to the top of the cleaning liquid tank (562); a sealing screw cap (564) is threadedly connected to the top of the liquid inlet pipe (563); a water pump (565) is fixedly mounted on the bottom of the cleaning liquid tank (562); an input end of the water pump (565) is connected to the interior of the cleaning liquid tank (562); an annular tube (566) is fixedly mounted on the output end of the water pump (565); the annular tube (566) is arranged in the middle of the front of the air quality detection sensor (55); and atomizing nozzles (567) are fixedly mounted on the annular tube (566) at equal intervals and arranged in an annular shape on one side of the annular tube (566) close to the air inlet pipe (31).

9. The environmental air quality detection device according to claim 6, characterized in that: The cleaning brush group (37) includes a scraper (371). The scrapers (371) of the cleaning brush group (37) on the air induction assembly (33) are arranged in a ring shape at equal intervals and fixedly mounted on the outer side of the fixing ring (335). The scraper (371) of the cleaning brush group (37) on the front cleaning group (34) is fixedly mounted on the outer end of the connecting rod (345). The outer side of the scraper (371) is fitted and connected to the inner wall of the air inlet pipe (31). Both sides of the scraper (371) are fixedly connected to a bending arm (372). The outer side of the bending arm (372) is fixedly connected to a cleaning brush plate (373). The outer side of the cleaning brush plate (373) is fitted and connected to the inner wall of the air inlet pipe (31).

10. A method for using an environmental air quality detection device, using the environmental air quality detection device according to claims 1-9, characterized in that: The steps include: Step 1: Start the test: Start the first motor (331), drive the rotating shaft (332) to drive the fan blades (333) to rotate in the forward direction, so that a negative pressure is formed inside the air inlet pipe (31), and the external air is sucked into the inside of the chassis (2), and the air quality detection sensor (55) performs the test. During the test, the air is assisted in exhausting through the exhaust window (6); Step 2: Cleaning the induced draft fan blades (333): After the inspection task is completed, the automatic cleaning program of the air inlet mechanism (3) is started, and the operator starts the cleaning program on the touch screen (4). The second motor (353) drives the screw (354) to rotate, and the slider (355) moves linearly along the screw (354) under the guidance of the guide rail (352), and the connecting arm (356) drives the cleaning frame (357) to move and sleeve on the outer surface of the induced draft fan blades (333); during this period, the water pump (565) extracts the cleaning liquid in the cleaning liquid tank (562) and transports it to the annular tube (566), and the atomizing nozzle (567) continuously sprays the cleaning liquid into the air inlet pipe (31). The second motor (353) runs alternately in forward and reverse directions, and the internal cleaning brush (358) moves up and down in contact with the induced draft fan blades (333) to scrape off dust and impurities on the surface of the induced draft fan blades (333); Step 3: Cleaning the front of the air inlet pipe (31): When the cleaning frame (357) moves, the rack (3463) on its connecting rod (3462) drives the rear end gear (3461) of the front cleaning group (34) connecting shaft (344) to rotate, so that the connecting shaft (344), the cross (343), the slip ring (342) and other components rotate, and the scraper (371) and the cleaning brush plate (373) of the front cleaning group (34) are in contact with the inner wall of the air inlet pipe (31) and rotate. With the cooperation of the continuous spray of the cleaning module (56), the dust on the pipe wall is scraped and cleaned, and the dust is discharged through the dust cleaning discharge chute (36); Step 4: After cleaning the rear of the air inlet mechanism (3) and the front of the air inlet pipe (31), the second motor (353) drives the rack (3463) to move upward and be stored in the top shell (351). The first motor (331) is started to drive the rotating shaft (332), so that the connecting frame (334) drives the cleaning brush assembly (37) on the outside of the fixed ring (335) to rotate. The cleaning module (56) continues to work, and the scraper (371) and the cleaning brush plate (373) are scraped against the inner wall of the rear side of the air inlet pipe (31) under the action of the atomized cleaning liquid, and the dust is discharged through the rear cleaning discharge chute (36). Step 5: Disassembly and maintenance. After cleaning, twist the mounting screw (53) to disengage its end from the limit hole (57). At this time, pull the bridge handrail (58) to open the top cover (51), then untie the power connectors of the first motor (331) and the second motor (353), and then remove the top cover (51) as a whole for comprehensive maintenance.

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