US Patent 7771671 Air conditioner device with partially insulated collector electrode

An air conditioning device comprises a substantially thin collector electrode capable of forming ions at a front and/or rear edge when charged. The thin collector electrode preferably having an insulating material disposed on the front and/or rear edge to prevent ions from being emitted therefrom. The collector electrode capable of being in the form of a thin elongated blade whereby an emitter electrode is upstream of the front edge or alternatively downstream of the front edge. The collector electrode alternatively in the form of a cylindrical structure or a porous grid having a plurality of air passageway cells therethrough.