Activated carbon air purifier is a type of activated carbon. It is specially treated to purify polluted air, so it is called air purification activated carbon.
Composition of activated carbon air purifier
The main components of the air purifier are: casing, filter section, air duct design, motor, power supply, LCD display, etc.
The particulate removal technology in the air of the purifier mainly includes mechanical filtration, adsorption, electrostatic dedusting, anion and plasma methods, and electrostatic electret filtration.
Mechanical filtration generally mainly captures particles through the following three methods: direct interception, inertial collision, and Brown's diffusion mechanism, which has a good effect on collecting small particles but has large wind resistance. In order to obtain high purification efficiency, the filter element needs to be dense and replaced regularly.
Adsorption uses the large surface area and porous structure of the material to capture particulate pollutants, which are easily blocked, and have a significant effect in removing gas pollutants;
Electrostatic dedusting is a dust collection method that uses high-voltage electrostatic fields to ionize the gas so that the dust particles are charged and adsorbed on the electrodes. Although its wind resistance is small, it has a poor trapping effect on large particles and fibers, which will cause discharge, and it will be time-consuming and difficult to clean. Ozone is generated and secondary pollution is formed.
The negative ion and plasma methods work similarly to remove indoor particulate pollutants. They both charge the particles in the air and coalesce to form larger particles and settle, but the particles are not actually removed, but only adhere to the nearby surface. , Easy to cause dust again.
The electrostatic electret filter is represented by 3M "electrostatic air filter", which adopts a breakthrough electrostatic filter material to effectively block particulate pollutants such as dust, hair debris, pollen, bacteria, etc. in the air, and has ultra-low impedance Ensure the stable operation and cooling effect of the air conditioner. In addition, the deep dust-tolerant design ensures a long service life. It is widely used in home and car air conditioners (such as SAIC, Volkswagen, GM and other well-known brand models) and some commercial building areas (such as Bird's Nest, Beijing Hotel, and Metro Airport Phase III).
Traditional standard filter media can remove particles above 10 microns very effectively. When the particle size is divided to the range of 5 micrometers, 2 micrometers or even submicrometers, the mechanical filtration system will become more expensive, and the wind resistance will increase significantly. Filtering through electrostatic electret air filter material can achieve high capture efficiency with low energy consumption, and also has the advantages of electrostatic dust removal and low wind resistance, but it does not need to be connected to a voltage of 10,000 volts, so it does not generate ozone. Its composition is made of polypropylene, which is convenient for disposal.