Update: 2020-06-09 15:58 Source: LUFTMY
Due to the continuous development of industrialization and urbanization, the haze caused by air pollution frequently visited, seriously affecting people's normal life.City regulators have also taken measures to control air pollution sources. In order to ensure indoor air quality, air purifiers have become a hot item in the category of household appliances. Here is the role of PM2.5 sensors in air purifiers.
The role of an air purifier
Is air purifier in order to improve indoor air quality, air purifier is also called the machine, the air cleaner, fresh air purifier, refers to adsorption, break down, or convert all kinds of air pollutants (generally include PM2.5, dust, pollen, peculiar smell, formaldehyde, decoration pollution, such as bacteria, allergens, etc.), effectively increase the air cleanliness of products, mainly divided into residential, commercial, industrial, building.At present, domestic and commercial air purification equipment is mainly used to clean indoor air pollution.Air purification devices filter out pollutants such as airborne particles, bacteria, viruses, fungal spores, pollen, asbestos and radon decay products.
The role of PM2.5 sensor in air purifier
In the current field of air purification, PM2.5 sensor has almost become the standard component of air purification equipment, whose function is to monitor the concentration of PM2.5 and other particulate matter in the air.Take GDS06 infrared PM2.5 sensor as an example. A constant light source (such as infrared led) is set inside the sensor. When air passes through the light, particles in the sensor will scatter it, resulting in attenuation of light intensity.The relative attenuation rate is proportional to the concentration of particulate matter.A light detector (such as a phototransistor) on the opposite side of the diagonal from the light source detects the light reflected by the particles and outputs a PWM signal (pulse-width modulation signal) based on the intensity of the reflected light to determine the concentration of the particles.For particulate matter with different particle sizes (such as PM10 and PM2.5), it can output a number of different signals to distinguish.
With the support of PM2.5 sensor, the air purifier can quickly sense the change of indoor air quality by using PM2.5 sensor, feed back to users, and change the shift position, which can undoubtedly clean the air more effectively and save energy and prolong life.