Biological filter for the sterilization and enrichment of a gas stream with negative ions

摘要

A biological filter for the sterilization and enrichment of a gas stream with negative ions, wherein said filter comprises in combination, on the path of the gas molecules and in the direction of flow of the gas, a first separating electrode which is brought to a negative potential, a second extraction electrode which is brought to a positive potential and entirely covered with electric insulating material, an ultraviolet lamp for irradiating said gas stream and a third output electrode which is brought to a negative potential.