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Working process of vehicle-mounted air purifier and application of PM2.5 sensor

Update: 2020-11-10 16:41 Source: LUFTMY Reading: ↻ News

The progress of the society developing rapidly, we are also constantly in improving living standards, food and clothing live line have greater improvement, also travel, car gradually to increase, now almost every family have belongs to own a car, seems to have become a symbol of identity, and even some also bought a very extravagant luxury car, in either type of cars, if driving for a long time, and don't do a good preventive measures, natural will appear a lot of problems, first of all, is the smell of the air inside the car is very bad, as long as the person sitting in it will feel a peculiar smell,In addition, external environment pollution is serious, and PM2.5 concentration in cars is also seriously exceeding the standard, which not only seriously affects our driving experience, but also affects people's health after a long time.

Working process of vehicle-mounted air purifier and application of PM2.5 sensor

In order to cater to the market, various automobile manufacturers have successively added air purification systems or carried on-board purifiers to their cars to improve the interior air quality and enhance the user's comfort.The purification system mainly consists of two processes: detection and purification.The detection process is generally equipped with an odor sensor and A PM2.5 sensor to detect the air quality in the vehicle. The purification process is generally realized by means of internal circulation ventilation, filter screen filtration, negative ions and other means.

The working process of vehicle-mounted air purifier

There are many different technologies and media in the air purifier, enabling it to provide users with clean and safe air.Common air purification technologies include: adsorption technology, negative (positive) ion technology, catalytic technology, photocatalyst technology, super-structured light mineralization technology, HEPA high efficiency filtration technology, electrostatic dust collection technology, etc.The material technology mainly includes: photocatalyst, activated carbon, synthetic fiber, HEPA high efficiency material, anion generator, etc.Existing air purifiers are mostly composite, that is, a variety of purification technologies and materials at the same time.

Step 1: It works by monitoring in-car air quality and smell in real time through odor sensors and PM2.5 sensors. When the system determines that in-car air pollution exceeds the standard, the system will first order the air conditioning system to use external circulation to breathe in fresh air.When fresh air is inhaled, it passes through a filter made with polyphenol added to grape seeds to filter out pollen, odors and some allergens.

Step 2: The humidity sensor in the rearview mirror of the car adjusts the dehumidification mode of the air conditioner by detecting the fog of the car window to avoid the air being too dry. This function can only monitor the humidity and adjust the dehumidification mode of the air conditioner, but does not have the humidification function.

Step 3: The filtered fresh air comes through the air duct to the central control unit equipped with the green leaf ethanol and fragrant wood fragrance, which will melt the air with the natural aroma of some trees and green leaves.

Step 4: When the air reaches the air conditioning outlet, the anion generator produces a large number of anions and mixes them into the air.Finally, the system simulates the flow pattern and frequency of natural wind to blow air into the cabin according to the amount of sunlight exposure and the temperature outside the vehicle, creating a pleasant feeling of walking through the forest.

In addition, if the system detects bad external air, it will automatically switch to the internal circulation mode like other intelligent automatic air conditioners.However, the air conditioning filter element and negative oxygen ion generator can still filter and purify the air inside the car after the switch, which is also its major feature.The purpose of the system is to release the rider from the stress of the wind and the aroma of the air, to clear his mind and to relax into a state of high concentration and concentration.

HPD05 Infrared PM2.5 Sensor Module
HPD05 Infrared PM2.5 Sensor Module

In-car PM2.5 detection and application of PM2.5 sensors

Most of the peculiar smell can be smelled, but the particulate pollution in cars is invisible and cannot be touched. The purification system is usually equipped with PM2.5 sensors, so as to better detect toxic and harmful objects in the air.The infrared HPD05 PM2.5 sensor is recommended here. The module can recognize 0.3 m fine particles and output the measured concentration of PM2.5/PM1.0, which is not calculated, with high accuracy.Compared with the traditional infrared PM2.5 sensor, the measurement accuracy is higher, and compared with the laser, the accuracy difference is not big, but the price is lower.

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