LOCAL IONIZING FILTER Russian patent published in 1999 - IPC

FIELD: air purification equipment. SUBSTANCE: local ionizing filter has tubular casing with converging tube at inlet end, needle-type electrode, flat or spherical grid with electrodes positioned in parallel with axis or directed toward outlet end, tubular cathode positioned adjacent to outlet end, and rod fixed on grid and positioned coaxially to casing and cathode. Needle-type electrode and tubular cathode are connected to negative pole, and grid and rod are connected to positive pole of high-voltage DC current source. EFFECT: increased efficiency, reduced power consumption and enhanced reliability in operation. 3 cl, 3 dwg