Temperature and humidity sensors used in car air purification systems

The core of the in-car air purification system is the air purifier, which is also called "air cleaner", air freshener, and purifier. It refers to a product that can absorb, decompose or transform various air pollutants (generally including PM2.5, dust, pollen, odor, decoration pollution such as formaldehyde, bacteria, allergens, etc.), and effectively improve the cleanliness of the air. Its main application areas are household, commercial, automotive, industrial, buildings, etc.

There are many different technologies and media in air purifiers, which enable them to provide clean and safe air to users. Commonly used air purification technologies include: adsorption technology, negative (positive) ion technology, catalytic technology, photocatalyst technology, superstructure light mineralization technology, HEPA high-efficiency filtration technology, electrostatic dust collection technology, etc.; material technologies mainly include: photocatalyst, activated carbon, synthetic fiber, HEPA high-efficiency material, negative ion generator, etc. Existing air purifiers are mostly composite, that is, they use multiple purification technologies and material media at the same time.

Step 1: Its working principle is to monitor the air quality and odor in the car in real time through a sensor. When the system thinks that the air pollution in the car exceeds the standard, it will first command the air conditioning system to use external circulation to inhale fresh air. After the fresh air is inhaled, it will pass through a filter element made of grape seed polyphenols to filter pollen, odor and some allergens.

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

Step 3: The filtered fresh air passes through the air duct to the fragrance device at the bottom of the center console which is equipped with green leaf ethanol and fragrant wood spices. It will blend the natural fragrance of some trees and green leaves into the air.

Step 4: When the air reaches the air conditioning outlet, the negative ion generator produces a large amount of negative ions and mixes them into the air. Finally, the system imitates the natural wind flow pattern and frequency to blow air into the cabin according to the amount of sunlight and the temperature outside the car, creating a comfortable feeling of walking through the forest.

In addition, if the system detects that the outside air is bad, it will automatically switch to the internal circulation mode like other intelligent automatic air conditioners. However, after switching, the air conditioning filter and negative oxygen ion generator can still filter and purify the air in the car, which is also a major feature. The purpose of this system is to relieve the driver and passengers from excessive tension through flowing wind and fragrant air, keep their minds clear, and enter a relaxed state with high attention and concentration.

Finally, I recommend a temperature and humidity sensor that can be used in the in-car air purification system . Gongcai.com imports high-quality temperature and humidity sensors from abroad, that is, the digital temperature and humidity sensor - HTU21D. HTU21D is a plug-and-play humidity and temperature composite sensor, which is an ideal choice for OEM applications that require reliable and accurate measurements. It is a series of modular products designed for transportation applications. It adopts a DFN package suitable for reflow soldering and is only 3 x 3 x 1mm in size; it provides a calibrated, linear I?C digital output signal. The temperature sensing element of the sensor can effectively measure gas, liquid or solid. In addition, the sensor can also detect low power, check and use to improve communication reliability. All this is due to its high-performance sensitivity, measurement accuracy and stability, while the easy-to-install threaded structure provides reliability for use in harsh environments. The numerous mechanical and electronic interfaces of the HTU21D temperature and humidity sensor simplify installation, so that it can not only meet the specific application requirements of different customers, but also be easily compatible with most existing applications.