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The working principle of common filter material filtering is to makes the dust particles collide with the fiber and then separated them from the gas stream. The reasons of dust particles colliding with the fiber, mainly rely on Brownian diffusion, interception, inertial impaction, interception and other mechanical blocking effect. When the fiber filter material is very fine, it can intercept the tiny particles, but this will be greatly increased drag. Therefore, ordinary filter material is difficult to make high efficiency and low resistance.

Particle path of the Brown movement
Particle path of the Brown movement
Filtration characteristics of the electrode material
Filtration characteristics of the electrode material
Filtering properties of common materials
Filtering properties of common materials

If the filter material with charge becomes charged fiber (i.e. electret), when the dust passes through the filtration, the process of filtration excepts the original mechanical barrier function, charged fiber (electret) can effectively absorb the dust particles by electrostatic charge, which will greatly improve the dust collection efficiency. Electret as filter material, originally cut them into small strips of polypropylene film in 1976 by J. Van Tum Hout et al. And processes the charged to wrinkled state that forms electret fiber. Because of low flow resistance, high efficiency and long service life, high dust collecting ability and the advantages of energy saving, the research development of this kind of air filter material very quickly. Static fiber making use of filtration mechanism of traditional air filtration materials, at the same time, by making use of the Coulomb force charged fiber to realize the capture of the particles. In this way, the effect of the rate increases and the resistance drops.

Electrostatic fiber
Electrostatic fiber

AG-Filter air conditioner filter not only using traditional air filter material filtering mechanism to intercept large particles, at the same time, also using electret ultrafine electrospun fibrous layer of charged fibers of the Coulomb force implementation of fine particle capture efficiency, the filtering efficiency is increased and drag is decreased. According to the research, AG-Filter air conditioner filter of PM2.5 particles filtration efficiency was increased from 76% to 99% than traditional structure filter, Unique electret permanent storage structure and the development of dust containing space also makes the service life longer than traditional filter extended by 30%.

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