Electrode PurifierAttributable to electrostatic enhanced fiber filtration. As far as the purification principle is concerned, its trapping force is mainly the Coulomb force and induction force of charged fibers to particles (charged or uncharged particles). Electrostatically-reinforced fiber filtration is to use pre-charge or add an external electric field to complete the purpose of efficiency and resistance reduction, but if the external electric field is removed, the time that the fiber retains the charge is extremely short, or the residual amount of charge quickly decay.

The electret filter material can store space charge for a long time. By applying an electric field to a dielectric material, and using certain physical and chemical methods to make the charge or polarization condition permanently reside on the electrolyte, a permanent electrode can be made. Although electret surgery can be charged, it can still be regarded as a permanent electrical body if the charging performance does not change much during its lifetime.

The fibers polarized in the air filter material of the electret usually carry a voltage of hundreds or even thousands of volts, and the electric field strength of the fiber gap can reach several megavolts per meter or even higher, because the electrostatic squeezing action makes the fibers open into mesh holes The gap size is much larger than the particle size. When the particles pass through the filter, the electrostatic force can not only effectively attract the charged particles, but also capture the neutral particles that are polarized by induction with the effect of electrostatic induction. In addition, the effect of static electricity not only causes the fibers to stretch out, but also makes the dust deposited on the filter material have a chain or dendritic structure. In the case of the same purification efficiency, the resistance of the resident electrode purifier is several times lower than that of the mechanical fiber filter.