Intelligent multi-parameter air quality controller

Abstract

The utility model discloses an intelligent multi-parameter air quality controller, which comprises an upper shell and a lower shell, the upper shell is positioned at the upper end of the lower shell, a sensor PCB (printed circuit board), a lower shell cover plate and a power supply PCB are mounted between the upper shell and the lower shell, and a screen is positioned and mounted at the upper end of the upper shell. A six-in-one sensor array, a communication unit, an STM32F103 main control chip, a three-speed fan driving module and a capacitive touch screen are installed on the sensor PCB, the six-in-one sensor array is connected with the communication unit, the communication unit is connected with the STM32F103 main control chip, and the STM32F103 main control chip is connected with the three-speed fan driving module and the capacitive touch screen. According to the intelligent multi-parameter air quality controller, six parameters are monitored at the same time, the comprehensive evaluation accuracy is improved by 40%, frequent starting and stopping of a draught fan are reduced through a return difference algorithm, the service life of equipment is prolonged by 30%, the maintenance cost is reduced by 25% through filter screen service life early warning, and the standard Modbus protocol supports access to more than 90% of building control systems.

Description

A smart multi-parameter air quality controller Technical Field

[0001] This utility model relates to the field of intelligent environmental monitoring technology, and in particular to an intelligent multi-parameter air quality controller. Background Technology

[0002] An air quality controller is a supporting device for air quality monitoring. It is suitable for intelligent air quality management in smart buildings, industrial environments, and other scenarios. It integrates multiple environmental sensors and supports the Modbus RTU protocol to control the linkage between air quality detection and fresh air systems. With the continuous development of technology, people have increasingly higher requirements for the manufacturing process of air quality controllers.

[0003] Existing air quality controllers have certain drawbacks in use. Single-parameter detection devices cannot comprehensively assess air quality, such as only detecting PM2.5 or CO2. Their control strategies are limited, lacking multi-mode linkage mechanisms such as timed / automatic / manual switching. Filter life management relies on manual inspection, and there is a lack of intelligent early warning. Traditional devices also have poor communication protocol compatibility, making it difficult to integrate with intelligent building systems, which has certain adverse effects on actual use. Therefore, we propose an intelligent multi-parameter air quality controller. Summary of the Invention

[0004] Technical problems solved: In view of the shortcomings of the existing technology, this utility model provides an intelligent multi-parameter air quality controller that monitors 6 parameters simultaneously, improves the accuracy of comprehensive evaluation by 40%, reduces the frequent start-stop of fans through hysteresis algorithm, extends equipment life by 30%, reduces maintenance costs by 25% through filter life warning, and supports access to more than 90% of building control systems through standard Modbus protocol, which can effectively solve the problems in the background technology.

[0005] Technical Solution: To achieve the above objectives, the technical solution adopted by this utility model is as follows: an intelligent multi-parameter air quality controller, comprising an upper shell and a lower shell, wherein the upper shell is positioned above the lower shell, and a sensor PCB board, a lower shell cover plate, and a power supply PCB board are installed between the upper shell and the lower shell. A screen is positioned and installed at the upper end of the upper shell. The sensor PCB board is equipped with a six-in-one sensor array, a communication unit, an STM32F103 main control chip, a three-speed fan drive module, and a capacitive touch screen. The six-in-one sensor array is connected to the communication unit, the communication unit is connected to the STM32F103 main control chip, and the STM32F103 main control chip is connected to the three-speed fan drive module and the capacitive touch screen.

[0006] Preferably, the six-in-one sensor array includes a temperature sensor, a humidity sensor, a PM2.5 sensor, a CO2 monitor, a formaldehyde monitor, and a TVOC monitor.

[0007] Preferably, a positioning pin is provided between the upper shell and the lower shell, and a heat dissipation cover is integrally formed on the outer side of the upper shell.

[0008] Preferably, the temperature sensor, humidity sensor, PM2.5 sensor, CO2 monitor, formaldehyde monitor, and TVOC monitor are integrated, and the temperature sensor, humidity sensor, PM2.5 sensor, CO2 monitor, formaldehyde monitor, and TVOC monitor have built-in adaptive control modules. When the detection parameter X meets the condition X≥th threshold H, the high-level mode is activated, and when X≤H-hysteresis Δ, the mode is downgraded, where Δ can be set to a range of 5-50%H.

[0009] Preferably, the upper shell and the lower shell are fixed together by positioning pins, and the upper shell and the heat sink are integrally formed by injection molding.

[0010] Preferably, the screen, upper shell, sensor PCB board, lower shell cover, power supply PCB board and lower shell are assembled together, the output end of the six-in-one sensor array is connected to the input end of the STM32F103 main control chip through a communication unit, and the STM32F103 main control chip controls the three-speed fan drive module and capacitive touch screen.

[0011] Beneficial effects: Compared with the prior art, the present invention provides an intelligent multi-parameter air quality controller, which has the following beneficial effects: The intelligent multi-parameter air quality controller improves the detection dimensions: it monitors 6 parameters at the same time, and the comprehensive evaluation accuracy is improved by 40%;

[0012] Control efficiency optimization: By reducing the frequency of fan start-stop through hysteresis algorithm, the equipment life is extended by 30%;

[0013] Intelligent management: Filter life warning reduces maintenance costs by 25%;

[0014] Enhanced compatibility: The standard Modbus protocol supports access to over 90% of building control systems;

[0015] By integrating six sensors for detection, using an adaptive gear control algorithm and Modbus communication protocol, the device achieves dynamic optimization and adjustment of the building environment. It supports three-speed fan linkage (≤200W), intelligent filter management, and multiple working mode switching (automatic / manual / timed). It is particularly suitable for the integrated control of fresh air systems in smart buildings. The entire air quality controller has a simple structure, is easy to operate, and performs better than traditional methods. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the overall structure of an intelligent multi-parameter air quality controller according to this utility model.

[0017] Figure 2 is a schematic diagram of the overall assembly structure of an intelligent multi-parameter air quality controller according to this utility model.

[0018] Figure 3 is a schematic diagram of the sensor PCB board in an intelligent multi-parameter air quality controller according to this utility model.

[0019] Figure 4 is a schematic diagram of the internal structure of the sensor PCB board in an intelligent multi-parameter air quality controller according to this utility model.

[0020] In the diagram: 1. Screen; 2. Upper shell; 3. Sensor PCB board; 4. Lower shell cover; 5. Power PCB board; 6. Lower shell; 7. Heat sink; 8. Positioning pin; 9. Temperature sensor; 10. Humidity sensor; 11. STM32F103 main control chip; 12. Three-speed fan drive module; 13. Capacitive touch screen; 14. PM2.5 sensor; 15. CO2 monitor; 16. Formaldehyde monitor; 17. Six-in-one sensor array; 18. TVOC monitor; 19. Communication unit. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0022] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] As shown in Figures 1-4, an intelligent multi-parameter air quality controller includes an upper shell 2 and a lower shell 6. The upper shell 2 is positioned above the lower shell 6. A sensor PCB board 3, a lower shell cover plate 4, and a power supply PCB board 5 are installed between the upper shell 2 and the lower shell 6. A screen 1 is installed at the upper end of the upper shell 2. The sensor PCB board 3 is equipped with a six-in-one sensor array 17, a communication unit 19, an STM32F103 main control chip 11, a three-speed fan drive module 12, and a capacitive touch screen 13. The six-in-one sensor array 17 is connected to the communication unit 19, and the communication unit 19 is connected to the STM32F103 main control chip 11. The STM32F103 main control chip 11 is connected to the three-speed fan drive module 12 and the capacitive touch screen 13. The controller monitors six parameters simultaneously, improving the overall evaluation accuracy by 40%. By reducing frequent fan start-stop through a hysteresis algorithm, the controller extends equipment life by 30%. Filter life warning reduces maintenance costs by 25%. The standard Modbus protocol supports access to more than 90% of building control systems.

[0025] Furthermore, the six-in-one sensor array 17 includes a temperature sensor 9, a humidity sensor 10, a PM2.5 sensor 14, a CO2 monitor 15, a formaldehyde monitor 16, and a TVOC monitor 18.

[0026] Furthermore, a positioning pin 8 is positioned between the upper shell 2 and the lower shell 6, and a heat dissipation cover 7 is integrally formed on the outer side of the upper shell 2.

[0027] Furthermore, the temperature sensor 9, humidity sensor 10, PM2.5 sensor 14, CO2 monitor 15, formaldehyde monitor 16, and TVOC monitor 18 are integrated, and the temperature sensor 9, humidity sensor 10, PM2.5 sensor 14, CO2 monitor 15, formaldehyde monitor 16, and TVOC monitor 18 have built-in adaptive control modules. When the detection parameter X meets the condition X≥th threshold H, the high-level mode is activated, and when X≤H-hysteresis Δ, the mode is downgraded, where Δ can be set to a range of 5-50%H.

[0028] Furthermore, the upper shell 2 and the lower shell 6 are fixed together by positioning pins 8, and the upper shell 2 and the heat sink 7 are integrally formed by injection molding.

[0029] Furthermore, the screen 1, upper shell 2, sensor PCB board 3, lower shell cover 4, power supply PCB board 5 and lower shell 6 are assembled together. The output end of the six-in-one sensor array 17 is connected to the input end of the STM32F103 main control chip 11 through the communication unit 19. The STM32F103 main control chip 11 controls the three-speed fan drive module 12 and the capacitive touch screen 13.

[0030] An intelligent air quality control device includes a six-in-one sensor array, a three-speed fan drive module, and a Modbus communication unit; the sensor array includes a temperature and humidity sensor (accuracy ±0.5℃ / ±3%RH) and a PM2.5 sensor (range 0-1000μg / m³). 3 CO2 sensor (range 400-5000ppm), formaldehyde sensor (range 0-1500μg / m³) 3 TVOC sensor (range 0-5000μg / m³) 3 ).

[0031] The built-in adaptive control algorithm starts high gear when the detection parameter X meets the condition X≥th threshold H, and downshifts when X≤(H-hysteresisΔ), where Δ can be set to a range of 5-50%H.

[0032] The integrated filter life management module triggers an early warning by accumulating the fan running time and supports manual reset (accumulation resumes after reset).

[0033] Using the Modbus RTU protocol, define the dedicated register address:

[0034] 0x00: Formaldehyde concentration (uint16, unit μg / m³) 3 )

[0035] 0x03: CO2 concentration (uint16, unit ppm)

[0036] 0x54: Device address (1-254)

[0037] 0x55: Baud rate configuration (0-6 correspond to 2400-115200bps).

[0038] It features a 4-inch touchscreen that supports dynamic display of air quality levels (Excellent / Good / Medium / Poor), with the display logic based on the level corresponding to the highest pollution parameter among PM2.5, CO2, and TVOC.

[0039] Working principle: This utility model includes a screen 1, an upper shell 2, a sensor PCB board 3, a lower shell cover 4, a power supply PCB board 5, a lower shell 6, a heat sink 7, a positioning pin 8, a temperature sensor 9, a humidity sensor 10, an STM32F103 main control chip 11, a three-speed fan drive module 12, a capacitive touch screen 13, a PM2.5 sensor 14, a CO2 monitor 15, a formaldehyde monitor 16, a six-in-one sensor array 17, a TVOC monitor 18, and a communication unit 19. It can monitor six parameters simultaneously, improve the accuracy of comprehensive evaluation by 40%, reduce the frequency of fan start-stop through hysteresis algorithm, extend equipment life by 30%, reduce maintenance costs by 25% through filter life warning, and support access to more than 90% of building control systems through standard Modbus protocol.

[0040] Core structure:

[0041] 86×86×22.8mm ABS shell, internal components:

[0042] Six-in-one sensor array (temperature / humidity / PM2.5 / CO2 / formaldehyde / TVOC)

[0043] STM32F103 main control chip

[0044] 4-inch capacitive touchscreen (480×320 resolution)

[0045] Three-speed fan drive module (AC220V, ≤200W)

[0046] RS485 communication unit (Modbus RTU protocol)

[0047] Innovative technological features:

[0048] Multi-parameter fusion control algorithm:

[0049] Based on a priority weighting model, air quality levels are dynamically determined by the maximum value among PM2.5, CO2, and VOCs.

[0050] Adaptive gear shifting system:

[0051] In automatic mode, the fan starts when the detected value exceeds the set threshold. The speed switching must meet the following requirements:

[0052] New gear trigger condition: Current value ≥ threshold

[0053] Gear downgrade condition: Current value ≤ (threshold - hysteresis)

[0054] Intelligent filter management system:

[0055] The cumulative working hours statistics module (1-9999 hours) displays a red warning icon on the main interface when the time limit is exceeded.

[0056] Multiprotocol communication architecture:

[0057] Supports Modbus RTU register mapping (address 0x00-0x55), and the baud rate is adjustable (2400-115200bps).

[0058] Control interface:

[0059] Three-speed fan interface (F1 / F2 / F3 correspond to low / medium / high)

[0060] Air valve control interface (V1 / V2 corresponds to closed / open)

[0061] Communication interface (RS485 A / B).

[0062] Example:

[0063] Office building applications:

[0064] Set the CO2 threshold (800ppm medium / 1200ppm high), and automatically activate the high-speed mode when the CO2 in the conference room exceeds 1200ppm;

[0065] Set a timer mode from Monday to Friday: automatic control will be activated from 08:00 to 18:00.

[0066] Hospital scenario implementation:

[0067] Enable PM2.5 / VOC dual-parameter monitoring and set the PM2.5 threshold (35 μg / m³). 3 Medium / 75μg / m 3 upscale);

[0068] The filter lifespan is set to 2000 hours, and a maintenance reminder will be automatically sent to the building management system when it expires.

[0069] It should be noted that, in this document, relational terms such as first and second (number one, number two), etc., are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An intelligent multi-parameter air quality controller, comprising an upper shell (2) and a lower shell (6), characterized in that: The upper shell (2) is positioned at the upper end of the lower shell (6). A sensor PCB board (3), a lower shell cover plate (4), and a power PCB board (5) are installed between the upper shell (2) and the lower shell (6). A screen (1) is positioned at the upper end of the upper shell (2). A six-in-one sensor array (17), a communication unit (19), an STM32F103 main control chip (11), a three-speed fan drive module (12), and a capacitive touch screen (13) are installed on the sensor PCB board (3). The six-in-one sensor array (17) is connected to the communication unit (19). The communication unit (19) is connected to the STM32F103 main control chip (11). The STM32F103 main control chip (11) is connected to the three-speed fan drive module (12) and the capacitive touch screen (13).

2. An intelligent multi-parameter air quality controller as claimed in claim 1, wherein: The six-in-one sensor array (17) includes a temperature sensor (9), a humidity sensor (10), a PM2.5 sensor (14), a CO2 monitor (15), a formaldehyde monitor (16), and a TVOC monitor (18).

3. The intelligent multi-parameter air quality controller according to claim 1, characterized in that: A positioning pin (8) is positioned between the upper shell (2) and the lower shell (6), and a heat dissipation cover (7) is integrally formed on the outer side of the upper shell (2).

4. The intelligent multi-parameter air quality controller of claim 2, wherein: The temperature sensor (9), humidity sensor (10), PM2.5 sensor (14), CO2 monitor (15), formaldehyde monitor (16) and TVOC monitor (18) are integrated. The temperature sensor (9), humidity sensor (10), PM2.5 sensor (14), CO2 monitor (15), formaldehyde monitor (16) and TVOC monitor (18) have built-in adaptive control modules. When the detection parameter X meets the condition X≥th threshold H, the high-level mode is activated. When X≤H-hysteresisΔ, the mode is downgraded. The range of Δ can be set to 5-50%H.

5. A smart multi-parameter air quality controller as claimed in claim 3, wherein: The upper shell (2) and the lower shell (6) are fixed together by a positioning pin (8), and the upper shell (2) and the heat sink (7) are integrally formed by injection molding.

6. The intelligent multi-parameter air quality controller of claim 1, wherein: The screen (1), upper shell (2), sensor PCB board (3), lower shell cover (4), power PCB board (5) and lower shell (6) are assembled together. The output end of the six-in-one sensor array (17) is connected to the input end of the STM32F103 main control chip (11) through the communication unit (19). The STM32F103 main control chip (11) controls the three-speed fan drive module (12) and the capacitive touch screen (13).

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