air purifier method

　　mechanical filtration

　　Generally, particles are mainly captured in the following three ways: direct interception, inertial collision, and Brownian diffusion mechanism. It has a good collection effect on fine particles but a large wind resistance. In order to obtain high purification efficiency, the filter element needs to be dense and regularly replaced.

　　adsorption

　　Adsorption is the use of the large surface area and porous structure of the material to capture particulate pollutants, which are easy to block, and the removal effect of gas pollutants is more significant.

　　Electrostatic precipitator

　　Electrostatic precipitation is a dust collection method that uses a high-voltage electrostatic field to ionize the gas so that the dust particles are charged and adsorbed on the electrode. Although its wind resistance is small, it has a poor effect on collecting larger particles and fibers, which will cause discharge, and it is troublesome and time-consuming to clean. Ozone is produced and secondary pollution is formed.

　　Negative ion and plasma method

　　Negative ion and plasma methods work similarly to the removal of indoor particulate pollutants. They both charge the particulate matter in the air, coalesce to form larger particles and settle down, but the particulate matter is not actually removed, but only attached to nearby surfaces. It is easy to cause dust to be raised again.

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