Multi-scene airflow self-adaptive control air purifier

Abstract

The invention provides a multi-scene airflow self-adaptive control air purifier, and relates to the technical field of air purifiers, the multi-scene airflow self-adaptive control air purifier comprises a main machine, the main machine comprises a front panel, a middle frame, a volute air duct, a centrifugal fan assembly, a rear shell assembly, a double-swing-blade air supply mechanism, a sensing module and a power module, a fixed arc-shaped plate, an adjustable arc-shaped plate and an output rotating shaft are arranged on the inner wall of the volute air duct, the adjustable arc-shaped plate is fixed to the output rotating shaft, the double-swing-blade air supply mechanism is arranged, 0-75-degree precise directional air supply is achieved through a first swing blade assembly, 0-60-degree splayed unfolding and shrinking are achieved through a second swing blade assembly, and the air outlet range is adjusted; clean air can be directionally conveyed according to the positions of personnel, the personnel area purification efficiency is improved, by arranging an adjustable arc-shaped plate and fixed arc-shaped plate matching structure on the inner wall of the volute air duct, a continuous arc-shaped slope is formed when the volute air duct is put down, the air resistance is reduced by 10%-15%, the air duct is narrowed when the volute air duct is erected, the air pressure is increased by 10%-12%, and the air supply requirements in different scenes are met.

Description

Technical Field

[0001] This invention belongs to the field of air purifier technology, and more specifically, relates to an air purifier with multi-scenario adaptive airflow control. Background Technology

[0002] As people pay increasing attention to indoor air quality, air purifiers have become core equipment for improving indoor air quality in various scenarios such as homes, offices, and medical facilities. The market demand for air purifiers is no longer limited to basic pollutant filtration functions, but is developing towards precision, intelligence, and scenario-based solutions. This requires devices to dynamically adjust operating parameters based on the distribution of people indoors and differences in regional air quality, achieving an optimal balance between purification effect and energy consumption and noise.

[0003] Currently, existing air purifiers still have many technical shortcomings in terms of airflow control and scene adaptation, making it difficult to meet diverse usage needs:

[0004] Firstly, the airflow control precision is insufficient. Existing equipment mostly adopts a single blade structure, which can only achieve simple left-right or up-down airflow. It cannot accurately deliver clean air to areas where people are active, which easily leads to problems such as untimely purification near people's areas and excessive purification far from people's areas, resulting in a serious waste of purification resources.

[0005] Secondly, the air duct adjustment capability is limited. The volute air duct structure of traditional air purifiers is fixed, and the air duct cross section and airflow trajectory cannot be adjusted. It is difficult to flexibly switch the air resistance and air pressure state according to the needs of the usage scenario. When used in small spaces, it is easy to generate noise due to excessive wind speed. When used in large spaces, it has the disadvantages of insufficient air delivery distance and limited purification coverage.

[0006] Third, the sensing capabilities are limited. The air quality detection modules of existing equipment are mostly integrated inside the main unit, which can only detect the air quality in a local area around the main unit. They cannot accurately obtain the differences in pollutant concentrations in different areas of the room. At the same time, they lack the ability to sense the location of people in real time, which makes it impossible for the equipment to dynamically adjust its operating strategy according to the actual scene.

[0007] Fourth, the level of intelligence is low. The existing control system has difficulty balancing the parameter relationship between purification rate, air quality, noise and energy consumption. It cannot automatically switch the operating mode according to the changes in the scene. It still maintains high load operation in areas with good air quality, resulting in energy waste and unnecessary noise interference. Fifth, the scene adaptability is poor. The single airflow adjustment method cannot adapt to the usage scenarios with different space sizes and different personnel distribution densities. It is difficult to meet the diverse needs such as single person close-range purification and multi-person wide-range purification.

[0008] In summary, existing air purifiers suffer from problems such as low airflow control precision, poor duct adjustment flexibility, limited sensing capabilities, insufficient intelligence, and weak scene adaptability, which restrict the improvement of the device's purification efficiency and user experience. Therefore, developing an air purifier that can adaptively adjust airflow direction, range, and wind pressure based on personnel location and regional air quality has significant practical importance and market value. Summary of the Invention

[0009] To address the aforementioned technical problems, this invention provides an air purifier with multi-scenario adaptive airflow control, which solves the problems of low airflow control accuracy, poor duct adjustment flexibility, limited sensing capabilities, insufficient intelligence level, and weak scene adaptability.

[0010] An air purifier with multi-scenario adaptive airflow control includes a main unit. The main unit includes a front panel, a middle frame, a volute duct, a centrifugal fan assembly, a rear shell assembly, a dual-blade air delivery mechanism, a sensing module, and a power module. The inner wall of the volute duct is provided with a fixed arc plate, an adjustable arc plate, and an output shaft. The adjustable arc plate is fixed on the output shaft and can be rotated to change the duct state to adjust the air pressure and air delivery distance. The dual-blade air delivery mechanism is installed at the air outlet of the main unit and includes a first blade assembly and a second blade assembly, which can accurately control the airflow direction and range, improving the purification targeting. The sensing module includes a radar detection module and a detachable air quality detection box assembly, which can collect personnel location and air quality data in real time, providing a reliable basis for adaptive control. The power module is a 24V low-voltage power adapter, which is electrically connected to the electrical components inside the main unit, providing a stable and safe power supply to ensure continuous and stable operation of the equipment.

[0011] Preferably, the front panel is fastened to the front end of the main unit, and a pre-filter and a filter are sequentially fixedly installed on the inner side of the front panel. The pre-filter can effectively intercept large dust particles, and the filter can strongly adsorb pollutants such as PM2.5 and TVOC, realizing air stratification filtration and improving the purification effect. The middle frame constitutes the main support structure of the main unit. The top of the middle frame integrates the main control board assembly and the sensing module. The layout is compact and reasonable, saving installation space. The volute air duct and centrifugal fan assembly are located inside the middle frame. The rear shell assembly is fastened to the rear end of the main unit and encloses the middle frame to form a closed airflow channel, which can reduce airflow leakage, ensure that the airflow flows along the preset path, and further improve the purification efficiency.

[0012] Preferably, the first oscillating blade assembly includes a first stepper motor, a crank, a first connecting rod, a first oscillating rod, and a first oscillating blade. The first stepper motor is fixedly installed on the top of the middle frame, and the output shaft of the first stepper motor is fixedly connected to one end of the crank. The end of the crank away from the first stepper motor is rotatably connected to the first connecting rod through an eccentric shaft pin, ensuring stable transmission and high control precision. The first oscillating blade is made of ABS plastic, which is lightweight and durable, and is arranged parallel to the upper layer of the air outlet. There are thirteen first oscillating rods and first oscillating blades. The rotating shaft end of each first oscillating blade is fixedly connected to the corresponding first oscillating rod. The first oscillating rod is rotatably connected to the first connecting rod, enabling precise adjustment of the angle from 0° to 75°, thereby directionally delivering clean air to the target area and improving the purification efficiency of the personnel activity area.

[0013] Preferably, the second oscillating blade assembly includes a second stepper motor, a drive gear, a driven gear, a third connecting rod, a second oscillating rod, a second connecting rod, a second oscillating blade, and a second oscillating blade support. The second stepper motor is fixedly installed on the side of the second oscillating blade support. The output shaft of the second stepper motor is fixedly connected to the drive gear. The drive gear and the driven gear mesh and transmit power, resulting in a stable transmission ratio and precise control. The second oscillating blade is made of plastic, which is inexpensive and easy to process. It is symmetrically arranged in the lower layer of the air outlet. There are four second oscillating rods and four second oscillating blades. The pins of the drive gear and the driven gear are rotatably connected to the ends of the second connecting rod and the third connecting rod, respectively. The second connecting rod and the third connecting rod are both connected to the rotating shaft end of the second oscillating blade through the second oscillating rod. This allows the second oscillating blade to achieve a figure-eight-shaped expansion / contraction from 0° to 60°, thereby flexibly controlling the air outlet range and air outlet speed to adapt to the purification needs of spaces of different sizes.

[0014] Preferably, the output shaft is installed inside the main unit, and its end is connected to a micro motor integrated in the middle frame. The transmission response is rapid and the control is sensitive. The adjustable arc plate can rotate around the output shaft. When lowered, it engages with the fixed arc plate to form a continuous arc slope. Together with the arc edge of the inner wall of the volute air duct, it provides a guide track for the airflow, which can reduce the wind resistance by 10%-15% and make the airflow flow smoothly. When upright, it narrows the air duct cross section, which can increase the wind pressure by 10%-12%. Together with the double swing blade assembly, it can realize long-distance directional air delivery and meet the air delivery needs in different scenarios.

[0015] Preferably, the air quality detection box assembly includes a front shell, a mounting shell, a laser particulate matter sensor, a TVOC sensor, a PCB board, a lithium battery, and an N35 strong magnet. The air quality detection box assembly is magnetically connected to the main unit via the N35 strong magnet, making it easy to install and remove. This allows users to perform air quality testing in different areas. The laser particulate matter sensor can detect particulate matter concentrations from 0.3μm to 10μm, and the TVOC sensor can accurately monitor the concentration of gaseous pollutants. The dual sensors work together to comprehensively collect air quality data and calculate the AQI index, breaking through the limitations of traditional air purifiers' local detection and providing accurate data support for the device's adaptive control.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this invention, by setting a double-blade air supply mechanism, the first blade assembly achieves precise directional air supply from 0° to 75°, and the second blade assembly achieves figure-eight expansion and contraction adjustment of the air supply range from 0° to 60°. Clean air can be directionally delivered according to the location of personnel, thereby improving the purification efficiency of personnel areas.

[0018] In this invention, by setting an adjustable arc plate and a fixed arc plate in combination on the inner wall of the volute air duct, a continuous arc slope is formed when it is lowered to reduce wind resistance by 10%-15%, and the air duct is narrowed when it is erected to increase wind pressure by 10%-12%, thus meeting the air supply needs in different scenarios.

[0019] In this invention, a detachable air quality detection box assembly is configured, which uses N35 strong magnets to achieve magnetic connection and easy disassembly. Combined with Bluetooth 5.0 wireless communication, it can detect air quality at multiple locations, breaking through the limitations of local detection in traditional air purifiers and improving the comprehensiveness and accuracy of the detection data.

[0020] In this invention, by setting three working modes—precise purification, energy-saving and quiet operation, and manual control—the system can automatically switch according to air quality and personnel distribution. The precise purification mode ensures the purification effect in personnel areas, while the energy-saving and quiet operation mode reduces energy consumption and noise, improving the user experience.

[0021] In this invention, the main control board integrates the data from the sensing module to automatically adjust the angle of the double blades, the fan speed, and the duct status, thereby achieving adaptive airflow control in multiple scenarios without the need for frequent manual adjustments, thus improving the intelligence and ease of operation of the equipment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the adjustable arc plate of the present invention;

[0024] Figure 3This is a schematic diagram of the structure of the fixed arc plate of the present invention;

[0025] Figure 4 This is a schematic diagram of the frame structure in this invention;

[0026] Figure 5 This is a schematic diagram of the centrifugal fan assembly of the present invention;

[0027] Figure 6 This is a schematic diagram of the crank mechanism of the present invention;

[0028] Figure 7 This is a schematic diagram of the structure of the first stepper motor of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the first oscillating blade of the present invention;

[0030] Figure 9 This is a schematic diagram of the structure of the second swing blade support of the present invention;

[0031] Figure 10 This is a structural schematic diagram of the air quality detection box assembly of the present invention.

[0032] In the diagram, the correspondence between component names and attached drawing numbers is as follows: 1. Front panel; 2. Primary filter; 3. Filter; 4. Radar detection module; 5. Middle frame; 6. Main control board assembly; 7. Air quality detection box assembly; 9. Volute air duct; 10. Centrifugal fan assembly; 11. Rear shell assembly; 12. Arc edge; 13. Adjustable arc plate; 14. Output shaft; 15. Fixed arc plate; 16. First oscillating blade; 17. First stepper motor; 8. Second swing blade; 19. Second stepper motor; 20. Second swing blade support; 21. Crank; 22. First connecting rod; 23. Second swing arm; 24. Second connecting rod; 25. Driving gear; 26. Driven gear; 27. Third connecting rod; 28. First swing arm; 71. Front housing; 72. Laser particulate matter sensor; 73. TVOC sensor; 74. PCB board; 75. Lithium battery; 76. N35 strong magnet; 77. Mounting housing. Detailed Implementation

[0033] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0034] Please see Figures 1-10This invention provides an air purifier with multi-scenario adaptive airflow control, including a main unit and a matching detachable air quality detection box assembly 7. The main unit consists of a front panel 1, a pre-filter 2, a filter 3, a middle frame 5, a main control board assembly 6, a volute air duct 9, a centrifugal fan assembly 10, a rear shell assembly 11, a double-blade air supply mechanism, a sensing module, and a power module, etc. It can accurately adjust the airflow direction and range based on ambient air quality and personnel distribution to adapt to the purification needs of different usage scenarios.

[0035] Specifically, the front panel 1 is fastened to the front of the main unit, and a pre-filter 2 and a filter 3 are fixedly installed on its inner side in sequence. The pre-filter 2 is used to intercept large dust particles, and the filter 3 is used to adsorb pollutants such as PM2.5 and TVOC.

[0036] The middle frame 5 forms the main support structure of the host. The top of the frame integrates the main control board assembly 6 and the sensing module. The volute air duct 9 and the centrifugal fan assembly 10 are fixedly installed inside. The rear shell assembly 11 is fastened to the rear of the host and forms a closed airflow channel with the middle frame 5.

[0037] The power module is a 24V low-voltage power adapter that is electrically connected to various electrical components inside the main unit. These components include the main control board assembly 6, the centrifugal fan assembly 10, and the stepper motor. The power module can provide a stable power supply.

[0038] The dual-blade air supply mechanism is installed at the air outlet of the main unit and includes a first blade assembly and a second blade assembly, which are used to achieve precise control of the airflow direction and range.

[0039] The first pendulum assembly includes a first stepper motor 17, a crank 21, a first connecting rod 22, thirteen first pendulum rods 28, and a first pendulum blade 16.

[0040] The first stepper motor 17 is a 35BYJ-46 stepper motor, which is fixed to the top of the middle frame 5. Its output shaft is fixedly connected to one end of the crank 21, and the other end of the crank 21 is rotatably connected to the first connecting rod 22 through an eccentric shaft pin.

[0041] The thirteen first swing blades 16 are made of ABS plastic and are arranged in parallel on the upper layer of the air outlet. The rotating shaft end of each first swing blade 16 is fixedly connected to the corresponding first swing rod 28, and the first swing rod 28 is rotatably connected to the first connecting rod 22.

[0042] When the first stepper motor 17 receives the pulse signal from the main control board assembly 6, its output shaft rotates at a preset angle, which drives the first connecting rod 22 to swing left and right through the crank 21, thereby driving the thirteen first pendulum blades 16 to rotate synchronously around the rotating shaft. The rotation angle adjustment range is 0°-75°, and the angle adjustment accuracy can reach 0.5°, realizing the directional and precise air delivery of clean air.

[0043] The second swing blade assembly includes a second stepper motor 19, a driving gear 25, a driven gear 26, a third connecting rod 27, a second swing rod 23, a second connecting rod 24, four second swing blades 18, and a second swing blade support 20.

[0044] The second stepper motor 19 is a 35BYJ-23 stepper motor, which is fixed to the side of the second swing blade bracket 20. Its output shaft is fixedly connected to the drive gear 25. The drive gear 25 meshes with the driven gear 26. The drive gear 25 has a module of 1 and 10 teeth; the driven gear 26 has a module of 1 and 26 teeth.

[0045] The four second blades 18 are made of plastic and are symmetrically arranged in the lower layer of the air outlet. The shaft pins of the driving gear 25 and the driven gear 26 are rotatably connected to the ends of the second connecting rod 24 and the third connecting rod 27, respectively. The second connecting rod 24 and the third connecting rod 27 are both connected to the shaft end of the second blade 18 through the second swing rod 23.

[0046] When the second stepper motor 19 drives the active gear 25 to rotate, the four second swing blades 18 are driven to synchronously expand and contract in a figure-eight shape from 0° to 60° through gear meshing. 0° is the completely vertical air outlet state, and 60° is the maximum figure-eight expansion state, thereby controlling the air outlet range and air outlet speed.

[0047] The inner wall of the volute air duct 9 is provided with a fixed arc plate 15, an adjustable arc plate 13 and an output shaft 14. The output shaft 14 is installed inside the main unit and its end is connected to the micro motor. The micro motor is integrated in the middle frame 5 and the adjustable arc plate 13 is fixed on the output shaft 14.

[0048] When the adjustable arc plate 13 is lowered, it engages with the fixed arc plate 15 to form a continuous arc slope, perfectly conforming to the arc curvature of the volute duct 9. Together with the arc edge 12 of the volute duct 9, it provides a guiding track for the airflow, making the radial air outlet of the centrifugal fan assembly 10 smoothly turn, reducing wind resistance by 10%-15%, and reducing the difference in wind pressure and flow velocity at various positions in the duct to ±3%. When the adjustable arc plate 13 is raised, the effective cross section of the duct narrows, the airflow is concentrated and guided, and the wind pressure increases by 10%-12%. Together with the double swing blade assembly, it achieves long-distance directional air delivery.

[0049] The sensing module includes an ultrasonic radar sensor and a detachable air quality detection box assembly 7, which are used to collect personnel location and air quality data to provide a basis for adaptive control.

[0050] The ultrasonic radar sensor is integrated into the radar detection module 4. The HC-SR04 range sensor is selected and installed at the top center of the host. Its range is 20cm-10m, the maximum detection angle is 150°, and the range accuracy is 2cm. It can detect the position coordinates and distance information of people in the room in real time. The detection data is transmitted to the main control board component 6 through the I2C communication protocol.

[0051] The detachable air quality detection box assembly 7 includes a front shell 71, a mounting shell 77, a laser particulate sensor 72, a TVOC sensor 73, a PCB board 74, a lithium battery 75, and an N35 strong magnet 76. The laser particulate sensor 72 is model HT5073, and the TVOC sensor 73 is model MS1100.

[0052] The laser particulate matter sensor 72 has a detection range of 0.3μm-10μm, and the TVOC sensor 73 has a detection range of 0.05mg / m³-10mg / m³. It can detect the concentrations of PM1.0, PM2.5, PM10 and TVOC and calculate the AQI.

[0053] The component is magnetically connected to the side of the main unit via N35 strong magnet 76, and is powered and charged via pogopin terminal. It uses Bluetooth 5.0 wireless communication with a maximum communication distance of 10m and supports multi-sensor coordinated operation, breaking through the local detection limitations of traditional air purifiers.

[0054] The main control board component 6 is based on an STM32F103 MCU and is equipped with a data storage unit, a communication module, and a fan drive module. The data storage unit uses a 16GB SD card to store historical detection data, control parameter thresholds, and scene adaptation models. The communication module uses an ESP32-S3 WiFi module that supports the 802.11b / g / n protocol and can establish a wireless connection with the user's mobile APP. The fan drive module uses an L298N motor drive chip and is connected to the centrifugal fan component 10. The centrifugal fan component 10 is a 24V low-voltage DC fan, and the fan drive module is used to precisely adjust the fan speed.

[0055] In this device:

[0056] Front panel 1: It is fastened to the front of the main unit, serving both protective and aesthetic purposes. Its inner side is used to fix the pre-filter 2 and filter 3.

[0057] Pre-filter 2: Installed on the inside of the front panel 1, its main function is to intercept large dust particles in the air, reducing the burden on subsequent filters.

[0058] Filter 3: Located behind the pre-filter 2, it is used to adsorb fine pollutants such as PM2.5 and TVOC to achieve deep air purification.

[0059] Mid-frame 5: Consists of the main support structure of the host, with the main control board assembly 6 and sensing module integrated at the top, and the volute air duct 9 and centrifugal fan assembly 10 inside, with a compact and reasonable layout.

[0060] Main control board component 6: Based on the STM32F103 MCU, and equipped with data storage unit, communication module and fan drive module, it is the control center of the whole machine, responsible for receiving data, issuing commands and switching working modes.

[0061] 9. Volute air duct: The airflow channel inside the main unit. The inner wall is equipped with a fixed arc plate 15, an adjustable arc plate 13 and an output shaft 14. The air resistance and air pressure can be changed by adjusting the air duct status.

[0062] Centrifugal fan assembly 10: provides power for airflow, drives air to be filtered by the filter screen and then transported to the air outlet along the volute air duct 9.

[0063] Rear shell assembly 11: It is fastened to the rear of the main unit and forms a closed airflow channel with the middle frame 5, reducing airflow leakage and improving purification efficiency.

[0064] Power module: It adopts a 24V low-voltage power adapter to provide stable and safe power supply to all electrical components such as the main control board assembly 6, centrifugal fan assembly 10, and stepper motor.

[0065] The first stepper motor 17, model 35BYJ-46, is fixed to the top of the middle frame 5 and provides power for the movement of the first pendulum.

[0066] Crank 21 and first connecting rod 22: Transmission components that convert the rotational motion of the first stepper motor 17 into the left and right swinging motion of the first connecting rod 22.

[0067] The first swing arm 28 (thirteen) and the first swing blade 16 (thirteen blades): The first swing blade 16 is made of ABS plastic and is arranged in parallel on the upper layer of the air outlet; the first swing arm 28 connects the first connecting rod 22 and the first swing blade 16, driving the first swing blade 16 to achieve precise rotation from 0° to 75°, thus completing directional air delivery.

[0068] The second stepper motor 19, model 35BYJ-23, is fixed to the side of the second swing blade bracket 20 and provides power for the movement of the second swing blade.

[0069] Driven gear 25 and driven gear 26: Driven gear 25 has a module of 1 and 10 teeth, and driven gear 26 has a module of 1 and 26 teeth. They transmit power through meshing.

[0070] The third link 27, the second swing arm 23, and the second link 24 are transmission components that convert the rotational motion of the gear into the opening and closing action of the second swing blade 18.

[0071] Second blade 18 (four blades): made of plastic, symmetrically arranged in the lower layer of the air outlet, can be expanded / contracted in a figure-eight shape from 0° to 60° to control the air outlet range and speed.

[0072] Second swing blade bracket 20: used to fix the second stepper motor 19 and the second swing blade assembly to ensure structural stability.

[0073] Fixed arc plate 15: Fixed to the inner wall of the volute air duct 9, and used in conjunction with the adjustable arc plate 13.

[0074] Adjustable arc plate 13: fixed on the output shaft 14, when lowered, it forms a continuous arc slope with the fixed arc plate 15, reducing wind resistance by 10%-15%; when erected, it narrows the air duct cross section and increases wind pressure by 10%-12%.

[0075] Output shaft 14: runs through the inside of the main unit and is connected at the end to a micro motor in the middle frame 5 to drive the adjustable arc plate 13 to rotate.

[0076] Arc-shaped edge 12: Located on the inner wall of the volute air duct 9, it provides a guiding track for the airflow, allowing the airflow to flow smoothly.

[0077] Radar Detection Module 4: Integrates HC-SR04 ultrasonic radar sensor, installed at the top center of the main unit, with a ranging range of 20cm-10m and a maximum detection angle of 150°, used to collect the location coordinates and distance information of people indoors in real time.

[0078] Detachable air quality detection box assembly 7

[0079] Front housing 71 and mounting housing 77: These form the outer shell of the detection box, protecting the internal components.

[0080] Laser particulate matter sensor 72 (model HT5073): Detection range 0.3μm-10μm, can monitor PM1.0, PM2.5 and PM10 concentrations.

[0081] TVOC sensor 73 (model MS1100): detection range 0.05mg / m³-10mg / m³, used to monitor the concentration of gaseous pollutants.

[0082] PCB board 74: Carries the sensor circuit, enabling data processing and transmission.

[0083] Lithium battery 75: Provides independent power to the detection box.

[0084] N35 Strong Magnet 76: Enables magnetic connection between the detection box and the main unit, facilitating disassembly and multi-position detection.

[0085] Adaptive control process of operating mode:

[0086] Precision purification mode

[0087] Triggering conditions: The ultrasonic radar sensor detects the presence of personnel within a range of 0.5m-5m, and the detachable air quality detection box component 7 detects that the AQI in the personnel area is greater than 35 or the TVOC concentration is greater than 0.6mg / m³.

[0088] Control Process: The main control board component 6 receives the personnel position coordinates from the radar sensor, calculates the target rotation angle of the first swing blade 16 (within the range of 0°-75°), and outputs a pulse signal to control the first stepper motor 17 to drive the first swing blade 16 to rotate to the target angle, so that the airflow is accurately directed to the personnel position. The retraction angle of the second swing blade 18 is determined according to the AQI level. The lower the AQI, the smaller the retraction angle, with a maximum retraction angle of 45°. The second stepper motor 19 is controlled to adjust the second swing blade 18 to the corresponding angle. The centrifugal fan speed is adjusted through the fan drive module to match the purification requirements, while controlling the noise level to ≤45dB.

[0089] Energy-saving silent mode

[0090] Triggering conditions: The detachable air quality detection box component 7 detects that the AQI in the personnel area is ≤25μg / m³ and the TVOC concentration is ≤0.1mg / m³.

[0091] Control process: Control the first blade 16 to rotate to 30°, taking into account both the personnel area and air circulation, control the second blade 18 to expand to 45°, increase the air outlet range and reduce wind resistance, reduce the centrifugal fan speed to ≥600r / min, at which time the equipment energy consumption is ≤10W and the noise is ≤30dB.

[0092] Manual control mode

[0093] Users send control commands via a mobile app. After receiving the commands, the main control board component 6 controls the first swing blade 16 and the second swing blade 18 to adjust to the set angle, while simultaneously adjusting the fan speed to the set value. The data storage unit records the manual parameters in real time for optimizing the scene adaptation model.

[0094] Working principle

[0095] In summary, when the air purifier is turned on, the pre-filter 2 and filter 3 first perform layered filtration of the intake air, the centrifugal fan assembly 10 provides power to make the airflow flow along the volute duct 9, and the adjustable arc plate 13 can adjust the duct state as needed to reduce wind resistance or increase wind pressure.

[0096] The sensing module collects personnel location and air quality data in real time and transmits it to the main control board component 6. The main control board component 6 judges the data and switches to the corresponding working mode, controlling the double-blade air supply mechanism to adjust the airflow direction and range.

[0097] In precision purification mode, airflow is directed to the personnel area; in energy-saving and quiet mode, the device operates with low power consumption; in manual mode, it responds to user-defined commands. The entire process achieves multi-scenario adaptive airflow control, improving purification efficiency and user experience.

[0098] The embodiments of the present invention are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention, and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

Claims

1. An air purifier with multi-scenario adaptive airflow control, comprising a main unit, characterized in that: The main unit includes a front panel 1, a middle frame 5, a volute air duct 9, a centrifugal fan assembly 10, a rear shell assembly 11, a double-blade air supply mechanism, a sensing module, and a power module. The inner wall of the volute air duct 9 is provided with a fixed arc plate 15, an adjustable arc plate 13 and an output shaft 14, and the adjustable arc plate 13 is fixed on the output shaft 14. The double-blade air supply mechanism is installed at the air outlet of the main unit and includes a first blade assembly and a second blade assembly. The sensing module includes a radar detection module 4 and a detachable air quality detection box assembly 7; The power module is a 24V low-voltage power adapter, which is electrically connected to the electrical components inside the host.

2. The air purifier with multi-scenario adaptive airflow control as described in claim 1, characterized in that, The front panel 1 is fastened to the front end of the main unit, and the pre-filter 2 and filter 3 are sequentially fixedly installed on the inner side of the front panel 1. The middle frame 5 constitutes the main support structure of the host. The top of the middle frame 5 integrates the main control board assembly 6 and the sensing module. The volute air duct 9 and the centrifugal fan assembly 10 are both located inside the middle frame 5. The rear shell assembly 11 is fastened to the rear end of the host and encloses the middle frame 5 to form a closed airflow channel.

3. The air purifier with multi-scenario adaptive airflow control as described in claim 2, characterized in that, The first oscillating blade assembly includes a first stepper motor 17, a crank 21, a first connecting rod 22, a first oscillating rod 28, and a first oscillating blade 16; The first stepper motor 17 is fixedly installed on the top of the middle frame 5. The output shaft of the first stepper motor 17 is fixedly connected to one end of the crank 21. The end of the crank 21 away from the first stepper motor 17 is rotatably connected to the first connecting rod 22 through an eccentric shaft pin.

4. An air purifier with multi-scenario adaptive airflow control as described in claim 3, characterized in that, The first oscillating blade 16 is made of ABS plastic and is arranged in parallel on the upper layer of the air outlet; There are thirteen first pendulum rods 28 and first pendulum blades 16. The pivot end of each first pendulum blade 16 is fixedly connected to the corresponding first pendulum rod 28. The first pendulum rod 28 is rotatably connected to the first connecting rod 22.

5. An air purifier with multi-scenario adaptive airflow control as described in claim 4, characterized in that, The second swing blade assembly includes a second stepper motor 19, a drive gear 25, a driven gear 26, a third connecting rod 27, a second swing rod 23, a second connecting rod 24, a second swing blade 18, and a second swing blade support 20; The second stepper motor 19 is fixedly installed on the side of the second swing blade bracket 20. The output shaft of the second stepper motor 19 is fixedly connected to the drive gear 25, and the drive gear 25 meshes with the driven gear 26 for transmission.

6. An air purifier with multi-scenario adaptive airflow control as described in claim 5, characterized in that, The second oscillating blade 18 is made of plastic and is symmetrically arranged on the lower layer of the air outlet; there are four of each of the second oscillating rod 23 and the second oscillating blade 18.

7. An air purifier with multi-scenario adaptive airflow control as described in claim 6, characterized in that, The pins of the driving gear 25 and the driven gear 26 are rotatably connected to the ends of the second connecting rod 24 and the third connecting rod 27, respectively. The second connecting rod 24 and the third connecting rod 27 are both connected to the shaft end of the second swing blade 18 through the second swing rod 23.

8. An air purifier with multi-scenario adaptive airflow control as described in claim 7, characterized in that, The output shaft 14 is installed inside the main unit, and its end is connected to a micro motor integrated in the middle frame 5.

9. An air purifier with multi-scenario adaptive airflow control as described in claim 8, characterized in that, The adjustable arc plate 13 can rotate around the output shaft 14. When it is lowered, it engages with the fixed arc plate 15 to form a continuous arc slope. When it is erected, the cross-section of the air duct is narrowed. The inner wall of the volute air duct 9 is provided with an arc edge 12.

10. An air purifier with multi-scenario adaptive airflow control as described in claim 9, characterized in that, The air quality detection box assembly 7 includes a front shell 71, a mounting shell 77, a laser particulate sensor 72, a TVOC sensor 73, a PCB board 74, a lithium battery 75, and an N35 strong magnet 76. The air quality detection box assembly 7 is magnetically connected to the main unit via the N35 strong magnet 76.

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