Patent ID: 7875104

Claim:
An electrostatic filter for a tower air cleaner providing improved cleanability that is in upended orientation when inside said tower air cleaner and in side orientation when placed on its side inside a washing machine for cleaning, comprising: a cartridge elongated along a longitudinal direction and adapted for use with said tower air cleaner; said elongated cartridge including longitudinally spaced top and bottom end caps, rigid side panels connected at the lateral edges of the top and bottom end caps and open front and rear faces through which air to be cleaned is streamed along an airflow direction that is generally perpendicular to the open front and rear faces; an electrode network including emitter and collector electrode first and second arrays spaced apart along the airflow direction that extend between and are supported by the longitudinally spaced top and bottom end caps; and means coupled to said cartridge for providing drainage of cleaning water that may have accumulated therein when cleaned inside said washing machine when the cartridge is in said upended orientation or said side orientation after cleaning in said washing machine so as to prevent intracartridge fluid retention and thereby to eliminate electrical shortages or other undesirable phenomena resulting therefrom.