An air purification device

Abstract

The utility model discloses an air purification device, it includes casing, fan subassembly, filter component and air direction adjusting mechanism. The casing is cubic box type structure, is equipped with main air outlet in the front, is equipped with main air inlet at the back. Fan subassembly sets up in the casing, is including centrifugal fan and flow guide cowl. Filter component is located at the air intake side of fan subassembly, including primary efficiency filter screen, high -efficient particulate air filter screen and activated carbon filter layer. Air direction adjusting mechanism includes vertical fairing and horizontal fairing, through the hinge joint of pivot and casing. Air quality monitoring module detects environmental parameter in real time and adjusts the operation mode automatically. Ultraviolet sterilization module provides disinfection function. Mobile mechanism makes equipment can arrange flexibly.

Description

Technical Field

[0001] This utility model relates to the field of air purification equipment technology, and in particular to an air purification device. Background Technology

[0002] Air purifiers are essential devices for improving indoor air quality and are widely used in homes, offices, and commercial spaces. Existing air purifiers typically employ a fixed design, where the positions of the air inlets and outlets and the airflow direction are fixed after manufacturing. This fixed structure has significant limitations in practical use. Due to differences in room layout, pollution source distribution, and activity areas, fixed-direction purifiers struggle to achieve optimal air circulation. When pollutants concentrate in a specific corner, fixed purifiers cannot specifically target and intensify purification in that area. Furthermore, traditional purifiers lack flexibility in responding to sudden pollution sources or when rapid purification of specific areas is required. Therefore, existing air purifiers suffer from insufficient adaptability and limited purification efficiency in their structural design. Utility Model Content

[0003] The purpose of this utility model is to provide an air purification device that solves the problems mentioned in the background art.

[0004] This invention is achieved as follows: an air purification device.

[0005] The system includes a housing, a fan assembly, a filter assembly, and an airflow adjustment mechanism. The housing is a cubic box structure with a main air outlet on the front and a main air inlet on the back. The fan assembly, comprising a centrifugal fan and a baffle, is located at the center of the housing. The filter assembly, located on the air inlet side of the fan assembly, includes a pre-filter, a high-efficiency particulate air filter, and an activated carbon filter layer. The airflow adjustment mechanism includes a vertical baffle at the main air outlet and a horizontal baffle at the main air inlet. The vertical baffle is hinged to the housing via a first pivot, and the horizontal baffle is hinged to the housing via a second pivot.

[0006] The main air outlet of the housing is a rectangular opening with mounting frames on all four sides. The main air inlet is a mesh opening with a protective mesh on the inside. The centrifugal fan of the fan assembly is fixed to the bottom of the housing by shock-absorbing pads, and the impeller of the centrifugal fan is a multi-blade structure. The air guide is a trumpet-shaped structure, with its large end facing the filter assembly and its small end connected to the centrifugal fan inlet. The pre-filter of the filter assembly is made of non-woven fabric and is fixed inside the housing by a slot. The high-efficiency particulate air filter has a folded structure with sealing strips on its edges. The activated carbon filter layer has a honeycomb structure and is filled with granular activated carbon.

[0007] The vertical guide vane of the wind direction adjustment mechanism is an arc-shaped plate structure with a radius of 300 mm. The first rotating shaft is a stainless steel shaft, with both ends connected to the side wall of the housing via bearing seats. A first drive motor is housed inside the vertical guide vane, and the first drive motor is connected to the first rotating shaft via a gear set. The horizontal guide vane is a flat plate structure with guide holes on its surface. The second rotating shaft is a carbon steel shaft, with both ends connected to the housing via sliding bearings. A second drive motor is housed inside the horizontal guide vane, and the second drive motor is connected to the second rotating shaft via a worm gear mechanism.

[0008] As a further improvement, the wind direction adjustment mechanism also includes an angle detection component. The angle detection component includes a first angle sensor disposed at the end of the first rotating shaft and a second angle sensor disposed at the end of the second rotating shaft. The first angle sensor is a photoelectric encoder, which is coaxially connected to the first rotating shaft.

[0009] The second angle sensor is a magnetic encoder, which is coaxially connected to the second rotating shaft.

[0010] As a further improvement, the angle detection assembly also includes a position feedback unit. The position feedback unit includes a control board disposed inside the housing and a microprocessor disposed on the control board. The microprocessor is connected to the first angle sensor and the second angle sensor via signal lines.

[0011] As a further improvement, an air quality monitoring module is located on the top of the housing. This module includes a particulate matter sensor, a formaldehyde sensor, and a temperature and humidity sensor. The particulate matter sensor is a laser scattering sensor with its probe extending beyond the top of the housing. The formaldehyde sensor is an electrochemical sensor with its detection head facing outwards from the housing. The temperature and humidity sensor is a capacitive sensor with its sensing element exposed to the air.

[0012] As a further improvement, the air quality monitoring module also includes a data display unit. The data display unit includes an LCD screen located on the front of the housing and a backlight panel located on the back of the LCD screen. The LCD screen is a touchscreen display with a diagonal dimension of five inches.

[0013] As a further improvement, a UV sterilization module is also installed inside the casing. The UV sterilization module includes a UV lamp, a reflector, and a protective mesh. The UV lamp is a low-pressure mercury lamp with a wavelength of 253.7 nanometers. The reflector is made of aluminum alloy with a reflective coating on its inner surface. The protective mesh is made of stainless steel wire mesh with a mesh size of 2 millimeters.

[0014] As a further improvement, the UV sterilization module also includes a timing control unit. The timing control unit includes a timing chip mounted on the control board and control buttons located on the side of the housing. The timing chip is a real-time clock chip with an accuracy of one part per million.

[0015] As a further improvement, a moving mechanism is provided at the bottom of the housing. The moving mechanism includes steering wheels, a brake device, and height-adjustable feet. The steering wheels are swivel casters with a diameter of 75 mm. The brake device is a pedal-type brake, connected to the steering wheels via a linkage. The height-adjustable feet have a threaded structure and an anti-slip pad on the bottom.

[0016] As a further improvement, the moving mechanism also includes a positioning device. The positioning device includes an electromagnetic brake mounted on the steering wheel and an infrared positioning sensor located at the bottom of the housing. The electromagnetic brake is a normally closed brake with a coil voltage of 24 volts. The infrared positioning sensor is a through-beam sensor with a detection range of five meters.

[0017] As a further improvement, an auxiliary air inlet is also provided on the side of the casing. The auxiliary air inlet has a louvered structure with an adjustable blade angle. A dust filter made of nylon mesh is installed inside the auxiliary air inlet.

[0018] This utility model's air purification device achieves flexible control of the air outlet direction and air inlet area through the installation of adjustable vertical and horizontal air guide plates. An air quality monitoring module detects environmental parameters in real time and automatically adjusts the operating mode. An ultraviolet sterilization module provides additional disinfection functionality. A movable mechanism allows for flexible arrangement of the equipment according to needs. The entire device has a reasonable structure, precise adjustment, and strong adaptability, effectively improving the efficiency and targeting of air purification. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of an air purification device according to the present invention;

[0020] Figure 2 This is a schematic diagram of the wind direction adjustment mechanism according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of a filtering component according to an embodiment of this application.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Housing; 2. Main air outlet; 3. Main air inlet; 4. Fan assembly; 5. Centrifugal fan; 6. Air guide shroud; 7. Filter assembly; 8. Pre-filter; 9. High-efficiency particulate air filter; 10. Activated carbon filter layer; 11. Airflow adjustment mechanism; 12. Vertical air guide plate; 13. First rotating shaft; 14. Horizontal air guide plate; 15. Second rotating shaft; 16. First drive motor; 17. Second drive motor; 18. First angle sensor; 19. Second angle sensor; 20. Control board; 21. Air quality monitoring module; 22. Particulate matter sensor; 23. Formaldehyde sensor; 24. Temperature and humidity sensor; 25. LCD screen; 26. Ultraviolet sterilization module; 27. Ultraviolet lamp; 28. Reflector; 29. ​​Direction wheel; 30. Height adjustment feet. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] Please see Figures 1 to 3 This utility model provides an air purification device. The air purification device mainly includes a housing 1, a fan assembly 4, a filter assembly 7, and an airflow adjustment mechanism 11. The entire device has a reasonable structure, precise adjustment, and strong adaptability, effectively improving the efficiency and targeting of air purification. It solves the technical problems of existing air purification devices, which, due to their fixed structural design, cannot adjust the position of the air inlet and outlet and the direction of airflow, making them difficult to adapt to different spatial layouts and pollution source distributions, and limiting purification efficiency.

[0026] Specifically, the housing 1 is a cubic box structure, mainly made of high-strength ABS engineering plastic or powder-coated steel plate. Its external dimensions can be customized according to actual application space requirements, for example, length, width, and height are all 500 mm to 800 mm. The housing 1 has a main air outlet 2 on the front and a main air inlet 3 on the back. The main air outlet 2 is a rectangular opening structure with external dimensions of approximately 300 mm × 300 mm to 600 mm × 600 mm. It has an integrally formed mounting frame on all four sides, which is flange-shaped and used to install the vertical guide vane 12 of the airflow adjustment mechanism 11. The main air inlet 3 is a mesh opening structure with mesh sizes of approximately 5 mm × 5 mm to 10 mm × 10 mm to prevent large particles from entering. A protective mesh, made of stainless steel wire mesh with mesh sizes of 2 mm × 2 mm, is welded or embedded on its inner side, providing secondary physical barrier.

[0027] An air quality monitoring module 21 is integrated on the top of the housing 1. The air quality monitoring module 21 includes a particulate matter sensor 22, a formaldehyde sensor 23, and a temperature and humidity sensor 24. The particulate matter sensor 22 is a laser scattering sensor, which uses the high-precision laser scattering principle to detect the concentration of PM2.5 and PM10 particles in the air. Its probe is cylindrical or conical, slightly protruding from the top surface of the housing 1 to ensure full contact with the outside air. The formaldehyde sensor 23 is an electrochemical sensor with a porous detection head facing outwards from the housing 1, used to accurately detect the formaldehyde concentration in the air. The temperature and humidity sensor 24 is a capacitive sensor with a sheet-like or mesh-like sensing element directly exposed to the air, monitoring ambient temperature and relative humidity in real time. The air quality monitoring module 21 also includes a data display unit. The data display unit includes a liquid crystal display screen 25 on the front of the housing 1 and a backlight panel on the back of the liquid crystal display screen 25. The LCD screen 25 is a touch screen with a diagonal size of five inches and a resolution of 800×480 pixels. It is fixed to the front panel of the housing 1 via an embedded mounting method, providing an intuitive human-machine interface and displaying real-time air quality data. The backlight panel uses an LED array light source and is fixed to the back of the LCD screen 25 with screws, providing uniform display brightness.

[0028] The housing 1 also houses an ultraviolet (UV) sterilization module 26. This module is positioned between the air outlet of the filter assembly 7 and the air inlet of the fan assembly 4, ensuring that UV light can reach the pre-filtered air. The UV sterilization module 26 includes a UV lamp 27, a reflector 28, and a protective mesh. The UV lamp 27 is a low-pressure mercury lamp, a straight tube approximately 200 mm to 400 mm in length, emitting UVC ultraviolet light with a wavelength of 253.7 nanometers. This wavelength has strong sterilization capabilities. It is fixed to a support frame inside the housing 1 using a dedicated lamp holder. The reflector 28 is a semi-cylindrical or parabolic structure, stamped from aluminum alloy. Its inner surface is coated with a high-reflectivity UV-C reflective coating, focusing and uniformly reflecting the UV light emitted by the UV lamp 27 into the airflow, thus improving sterilization efficiency. The protective mesh cover is made of stainless steel wire mesh with a mesh size of two millimeters and a rectangular frame structure. It is fixed to the outside of the ultraviolet lamp tube 27 by clips or screws to prevent personnel from accidentally touching the ultraviolet lamp tube 27 or being directly exposed to ultraviolet rays. The ultraviolet sterilization module 26 also includes a timing control unit. The timing control unit includes a timing chip mounted on the control board 20 and control buttons mounted on the side of the housing 1. The timing chip is a high-precision real-time clock chip with an accuracy of one part per million. It is connected to the microprocessor via an I2C bus to realize the precise timing start and stop of the ultraviolet sterilization module 26. The control buttons are membrane keys or touch keys, which are installed on the side of the housing 1 and are used to manually set or switch the ultraviolet sterilization timing mode.

[0029] The bottom of the housing 1 is equipped with a moving mechanism. This moving mechanism includes steering wheels 29, a braking device, and height-adjustable feet 30. Four steering wheels 29 are provided, forming a swivel caster structure with a wheel diameter of 75 mm. They are made of wear-resistant polyurethane material, and their wheel seats are made of cast steel or high-strength engineering plastic. They are bolted to the four corners of the bottom of the housing 1, ensuring the equipment can move freely in all directions. The braking device is a pedal-type brake, connected to the bearing seat of the steering wheels 29 via a linkage mechanism. When the pedal is pressed, the brake block presses firmly against the wheel surface of the steering wheels 29, locking them and preventing accidental slippage. Four height-adjustable feet 30 are provided, featuring a threaded structure composed of a high-strength screw and a threaded sleeve. Rotating the screw allows for precise height adjustment of the bottom of the housing 1 to adapt to uneven ground. The bottom of each foot is equipped with an anti-slip pad made of rubber material to increase friction and protect the ground. The moving mechanism also includes a positioning device. The positioning device includes an electromagnetic brake mounted on the steering wheels 29 and an infrared positioning sensor mounted on the bottom of the housing 1. The electromagnetic brake is a normally closed brake with a coil voltage of 24 volts DC. When power is off, the brake is locked and released when power is on, ensuring reliable locking of the equipment when it is not moving. The infrared positioning sensor is a through-beam sensor with a detection range of five meters. Its transmitter and receiver are located diagonally at the bottom of the housing 1, and it is used to detect whether the equipment is accurately parked in a preset position or area, providing positioning feedback signals.

[0030] The housing 1 also has an auxiliary air inlet on its side. This auxiliary air inlet has a louvered structure, with blades made of lightweight aluminum alloy or engineering plastic. It is connected to an external manual or electric adjustment knob via a linkage mechanism, allowing for stepless adjustment of the blade angle from 0 to 90 degrees, thereby controlling the side airflow volume and direction. The auxiliary air inlet has a dust filter inside, made of nylon mesh with approximately 1 mm × 1 mm mesh openings. It is secured by clips or magnetic attachment for easy disassembly and cleaning.

[0031] The fan assembly 4 is located at the center of the housing 1 to ensure symmetrical airflow. The fan assembly 4 includes a centrifugal fan 5 and a flow guide 6. The centrifugal fan 5 is fixed to a support frame inside the bottom of the housing 1 by shock-absorbing pads made of highly elastic rubber or damping material, effectively absorbing fan vibration and noise. The impeller of the centrifugal fan 5 has a multi-blade structure, made of galvanized steel or aluminum alloy sheet by stamping and welding, with 60 to 120 blades, providing high air pressure and airflow output while maintaining a low noise level. The flow guide 6 has a horn-shaped structure, injection molded from engineering plastic. Its large end faces the filter assembly 7, and its small end is tightly connected to the inlet of the centrifugal fan 5 via a flange or clamp connection. Its function is to smoothly transition the airflow, reduce eddy current losses, and improve fan efficiency.

[0032] Please see Figure 3 The filter assembly 7 is located on the air inlet side of the fan assembly 4, specifically between the main air inlet 3 and the fan assembly 4, and is arranged in a stacked manner. The filter assembly 7 includes a pre-filter 8, a high-efficiency particulate air filter 9, and an activated carbon filter layer 10. The pre-filter 8 is located on the outermost layer of the filter assembly 7, closest to the main air inlet 3. It is made of non-woven fabric, such as G4 or F5 grade filter cotton, and has a rectangular frame structure. It is fixed to the guide rail inside the housing 1 via slots for easy and quick disassembly and replacement. It is mainly used to filter larger particles, hair, and coarse dust with a diameter greater than 5 micrometers in the air. The high-efficiency particulate air filter 9 is located after the pre-filter 8. It has a folded structure and is made of H13 or H14 grade HEPA filter paper. It has a large unfolded area and high filtration efficiency, effectively filtering fine particulate matter with a diameter less than 0.3 micrometers in the air, such as bacteria, virus carriers, and PM2.5. The edge of the high-efficiency particulate air filter 9 is equipped with a sealing strip made of EPDM rubber or polyurethane foam to ensure a seamless connection between the filter and the housing 1, preventing unfiltered air from bypassing. The activated carbon filter layer 10 is located after the high-efficiency particulate air filter 9 and is closest to the fan assembly 4. It has a honeycomb structure supported by a PP or ABS plastic frame and filled with granular activated carbon. The granular activated carbon is made of coconut shell or coal-based activated carbon, possessing a rich pore structure and high adsorption capacity. It is mainly used to adsorb odors, formaldehyde, benzene compounds, and other harmful chemical gases in the air, achieving deep purification.

[0033] Please see Figure 2The airflow adjustment mechanism 11 includes a vertical guide plate 12 disposed at the main air outlet 2 and a horizontal guide plate 14 disposed at the main air inlet 3. The vertical guide plate 12 has a rectangular arc-shaped structure, made of lightweight aluminum alloy or ABS engineering plastic, with a radius of curvature of 300 mm. Its dimensions match the main air outlet 2. It is hinged to the housing 1 via a first rotating shaft 13, allowing it to swing left and right to adjust the airflow direction. The first rotating shaft 13 is a stainless steel shaft with a diameter of approximately 10 to 15 mm. Both ends are fixedly connected to the side walls of the housing 1 via flanged self-lubricating bearing seats to ensure smooth rotation of the vertical guide plate 12. A first drive motor 16 is installed inside the vertical guide plate 12. The first drive motor 16 is a small DC geared motor or stepper motor, bolted to a bracket inside the vertical guide plate 12. It is connected to the first rotating shaft 13 via a gear set, driving the first rotating shaft 13 to rotate, thereby achieving precise angle adjustment of the vertical guide plate 12. The gear set includes a driving gear and a driven gear. The driving gear is fixed to the output shaft of the first drive motor 16, and the driven gear is fixed to the first rotating shaft 13.

[0034] The transverse guide plate 14 is a flat plate structure made of the same material as the vertical guide plate 12. Multiple guide holes are evenly distributed on its surface. These holes are circular or elliptical, with a diameter of approximately 10 to 20 millimeters. The design of these holes guides airflow and reduces resistance. The transverse guide plate 14 is hinged to the housing 1 via a second rotating shaft 15, allowing it to swing up and down to adjust the air intake area. The second rotating shaft 15 is a carbon steel shaft with a diameter of approximately 10 to 15 millimeters. Both ends are connected to the sidewalls of the housing 1 via sliding bearings. These sliding bearings are self-lubricating oil bearings to ensure flexible rotation of the transverse guide plate 14. A second drive motor 17, a small DC geared motor or stepper motor, is installed inside the transverse guide plate 14. This second drive motor is bolted to a bracket inside the transverse guide plate 14 and connected to the second rotating shaft 15 via a worm gear mechanism, driving the second rotating shaft 15 to rotate, thereby achieving precise angle adjustment of the transverse guide plate 14. The worm gear mechanism includes a worm and a worm wheel. The worm is fixed to the output shaft of the second drive motor 17, and the worm wheel is fixed to the second rotating shaft 15. The worm gear mechanism has a large reduction ratio and a self-locking function to ensure the accuracy and stability of angle adjustment.

[0035] The wind direction adjustment mechanism 11 also includes an angle detection component. The angle detection component includes a first angle sensor 18 disposed at the end of the first rotating shaft 13 and a second angle sensor 19 disposed at the end of the second rotating shaft 15. The first angle sensor 18 is a photoelectric encoder, coaxially connected to the first rotating shaft 13, and detects the rotation angle of the first rotating shaft 13 in real time with an accuracy of 0.1 degrees. The second angle sensor 19 is a magnetic encoder, coaxially connected to the second rotating shaft 15, and detects the rotation angle of the second rotating shaft 15 in real time with an accuracy of 0.1 degrees as well. The angle detection component also includes a position feedback unit. The position feedback unit includes a control board 20 disposed inside the housing 1 and a microprocessor disposed on the control board 20. The control board 20 is a PCB circuit board, which integrates a drive circuit, a power management module, and a communication interface. The microprocessor is a high-performance single-chip microcomputer, which is connected to the first angle sensor 18 and the second angle sensor 19 through shielded signal lines, receives real-time angle data, calculates the actual position of the guide vane according to a preset program, and compares it with the target position to achieve closed-loop control of wind direction adjustment. The microprocessor can also automatically adjust the action of the airflow adjustment mechanism 11 based on the feedback data from the air quality monitoring module 21 to optimize the purification effect.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air purification device, comprising: The enclosure (1), the fan assembly (4) disposed inside the enclosure (1), and the filter assembly (7) disposed on the air inlet side of the fan assembly (4); the enclosure (1) is a cubic box structure, with a main air outlet (2) on the front and a main air inlet (3) on the back; the fan assembly (4) includes a centrifugal fan (5) and a guide shroud (6); the filter assembly (7) includes a primary filter (8), a high-efficiency particulate air filter (9), and an activated carbon filter layer (10); characterized in that: it also includes an air direction adjustment mechanism (11); the air direction adjustment mechanism (11) includes a vertical guide plate (12) disposed at the main air outlet (2) and a horizontal guide plate (14) disposed at the main air inlet (3); the vertical guide plate (12) is connected to the enclosure via a first rotating shaft (13). The body (1) is hinged; the transverse guide plate (14) is hinged to the housing (1) through the second rotating shaft (15); the vertical guide plate (12) is an arc-shaped plate structure; the first rotating shaft (13) is a stainless steel shaft, and its two ends are connected to the side wall of the housing (1) through bearing seats; the vertical guide plate (12) is provided with a first drive motor (16), and the first drive motor (16) is connected to the first rotating shaft (13) through a gear set; the transverse guide plate (14) is a flat plate structure, and its surface is provided with guide holes; the second rotating shaft (15) is a carbon steel shaft, and its two ends are connected to the housing (1) through sliding bearings; the transverse guide plate (14) is provided with a second drive motor (17), and the second drive motor (17) is connected to the second rotating shaft (15) through a worm gear mechanism.

2. The air purification device according to claim 1, characterized in that: The wind direction adjustment mechanism (11) further includes an angle detection component; the angle detection component includes a first angle sensor (18) disposed at the end of the first rotating shaft (13) and a second angle sensor (19) disposed at the end of the second rotating shaft (15); the first angle sensor (18) is a photoelectric encoder, which is coaxially connected to the first rotating shaft (13); the second angle sensor (19) is a magnetic encoder, which is coaxially connected to the second rotating shaft (15).

3. The air purification device according to claim 2, characterized in that: The angle detection component also includes a position feedback unit; the position feedback unit includes a control board (20) disposed inside the housing (1) and a microprocessor disposed on the control board (20); the microprocessor is connected to the first angle sensor (18) and the second angle sensor (19) via signal lines.

4. The air purification device according to claim 1, characterized in that: An air quality monitoring module (21) is provided on the top of the housing (1); the air quality monitoring module (21) includes a particulate matter sensor (22), a formaldehyde sensor (23) and a temperature and humidity sensor (24); the particulate matter sensor (22) is a laser scattering sensor, and its probe extends out of the top of the housing (1); the formaldehyde sensor (23) is an electrochemical sensor, and its detection head faces the outside of the housing (1); the temperature and humidity sensor (24) is a capacitive sensor, and its sensing element is exposed to the air.

5. The air purification device according to claim 4, characterized in that: The air quality monitoring module (21) also includes a data display unit; the data display unit includes a liquid crystal display (25) disposed on the front of the housing (1) and a backlight panel disposed on the back of the liquid crystal display (25); the liquid crystal display (25) is a touch screen with a diagonal size of five inches.

6. The air purification device according to claim 1, characterized in that: The housing (1) is also equipped with an ultraviolet sterilization module (26); the ultraviolet sterilization module (26) includes an ultraviolet lamp (27), a reflector (28) and a protective mesh cover; the ultraviolet lamp (27) is a low-pressure mercury lamp with a wavelength of 253.7 nanometers; the reflector (28) is made of aluminum alloy and its inner surface is coated with a reflective coating; the protective mesh cover is a stainless steel wire mesh with a mesh size of 2 millimeters.

7. The air purification device according to claim 6, characterized in that: The ultraviolet sterilization module (26) also includes a timing control unit; the timing control unit includes a timing chip disposed on the control board (20) and a control button disposed on the side of the housing (1); the timing chip is a real-time clock chip with an accuracy of one part per million.

8. The air purification device according to claim 1, characterized in that: The bottom of the housing (1) is provided with a moving mechanism; the moving mechanism includes a steering wheel (29), a braking device and a height adjustment foot (30); the steering wheel (29) is a universal wheel with a wheel diameter of 75 mm; the braking device is a pedal brake, which is connected to the steering wheel (29) through a connecting rod; the height adjustment foot (30) is a threaded structure, and its bottom is provided with an anti-slip pad.

9. The air purification device according to claim 8, characterized in that: The moving mechanism also includes a positioning device; the positioning device includes an electromagnetic brake mounted on the steering wheel (29) and an infrared positioning sensor mounted on the bottom of the housing (1); the electromagnetic brake is a normally closed brake with a coil voltage of 24 volts; the infrared positioning sensor is a through-beam sensor with a detection distance of 5 meters.

10. The air purification device according to claim 1, characterized in that: The side of the housing (1) is also provided with an auxiliary air inlet; the auxiliary air inlet is a louvered structure with an adjustable blade angle; the auxiliary air inlet is provided with a dustproof net, which is made of nylon mesh.

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