Patent ID: 6656248
Filing Date: 2003-12-02
Classification: B03C,Y10S

Abstract:
Method to clean air, where materials in the form of particles and/or droplets are separated from the gas flow, in which method the gas flow is directed through a collection chamber towards the outer casings, which are grounded and in which method high voltage is supplied to ion yield tips, in which the ion beam from the ion yield tips towards the collection surfaces separates the desired materials and in which the electrically conductive collection surfaces are insulated from the outer casings and a high voltage is supplied to the collection surface having an opposite direct-voltage than the high voltage supplied to the ion yield tips, wherein the collection surface is totally rapidly and conveniently replaceable, and replacement of the collection surface is performed using a protective covering bag which separates the collected material and prohibits the material from spreading into the surrounding indoor environment.