US Patent 7591884 Air cleaner with electrostatic flocked piles

An air cleaner including an ionization unit and a dust collection unit is provided. A plurality of electrostatic flocked piles may be provided on the ionization unit, or on the dust collection unit, or on both the ionization unit and the dust collection unit. The electrostatic flocked piles further improve air cleaning performance by filtering out foreign materials through both physical contact and by filtering ionized foreign materials using electrostatic attraction. The air cleaner may be widely adapted for use with various types of air conditioning apparatuses, as well as in a stand alone application.