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Application of PM2.5 sensor in vehicle air purifier system

Update: 2019-11-01 17:27 Source: LUFTMY Reading: ↻ News
 

No matter what type of car, if you drive for a long time, the air inside the car is very smelly. As long as you sit in the car, you will feel a peculiar smell. In addition, the external environment is seriously polluted, and the PM2.5 concentration in the car will also exceed the standard, which not only seriously affects our driving experience, but also affects people's health for a long time.

In order to cater to the market, the major automobile manufacturers have successively added air purification system or equipped with vehicle mounted purifier to improve the air quality in the vehicle and improve the user's car comfort.The purification system mainly includes two processes: detection and purification.The detection process is generally carried out by means of odor sensor and PM2.5 sensor. The purification process generally includes internal circulation ventilation, filter screen filtration, anion and other means.

vehicle air purifier system
vehicle air purifier system

1.Vehicle odor pollution source

Moldy smell: this may be caused by bacteria in the evaporator and air duct caused by the air conditioning system in the car not cleaned for a long time, and the peculiar smell caused by the bacteria moldy.

Gasoline smell: the rubber pipeline of the gasoline purification carbon tank is aging; the connection of the gasoline pipe has leakage, which needs to be tightened / repaired; the sealing performance becomes poor after disassembling and assembling the gasoline pump.

When a new car opens the door, it will smell a strong smell of plastic and rubber. If you sit in the car for a long time, you may even vomit or faint. It mainly comes from interior decoration, including a series of plastic parts and leather covering parts for instrument panel, door and seat. For just a few months of production of plastic parts have a light taste, and determined by the stability of chemical properties.

In addition, for the cladding parts, the plastic framework and leather are bonded by glue. The glue itself contains a series of irritating odor such as benzene compounds and glass uric acid, which is more consistent with the smell of new cars. These products will emit formaldehyde, benzene and other harmful substances after exposure to the sun, which will have an impact on human health.

2.PM2.5 detection sensors and common sensors in the vehicle

Most of the odor can be smelled, but the particulate pollution in the air is invisible and touchable.Generally, PM2.5 sensors are installed in the purification system, so as to better detect toxic and harmful objects in the air.LD11, developed by luftmy, a dust sensor manufacturer, is a high-precision particle concentration sensor based on Mie scattering theory. It can continuously collect and calculate the number of suspended particles with different particle sizes in the air per unit volume, i.e. particle concentration distribution, which can be converted into mass concentration, and output in the form of general digital interface.The automobile air quality sensor product is a universal and miniaturized module. Based on the principle of Mie scattering, the detection of dust particles in the air has good consistency and stability. With serial port output and PWM output, easy to use. Small size, easy to integrate. Used to detect pm1.0, PM2.5 and PM10.

LD11 Laser PM2.5 dust sensor
LD11 Laser PM2.5 dust sensor

①. Main features of air pollution sensor LD11

Design thin and thin, zero error alarm rate, high consistency, real-time response, high measurement accuracy, low power consumption, long life, serial port multi-protocol output PM0.3 PM0.5 PM1.0 PM2.5 PM10

②. Automotive particulate matter sensor LD11 main applications

Air purifier, fresh air system, portable instrument, air quality monitoring equipment, air conditioning, smart home equipment and other places.

Vehicle air purification system equipped with air quality sensor PM2.5 sensor will be a major trend of future vehicle development. Once it is detected that the air quality in the car is poor or PM2.5 concentration is too high, the vehicle purification system will be automatically turned on to purify the air in the car and keep the air fresh at all times.

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