VENTILATION AIR CLEANING DEVICE Russian patent published in 1994 - IPC

FIELD: cleaning of air. SUBSTANCE: device has housing formed as a plurality of spherical segments with their centers being axially aligned with common vertical central axis and radius of each subsequent lower segment exceeding that of previous segment by 1.3-1.4 times. Each lower segment covers air-intake recesses 2 of each previous segment across their upper level. Apex of conical dust-collector 6 with and angle of 20-30 deg. is aligned with central axis along lower level of air-intake recesses 2 of first spherical segment. Dust-collecting hopper is snugly passed through lower bases of spherical segments. Annual openings 8 with rigid ribs 9 are cut above level of spherical segments in dust-collecting hopper. Additional exhaust branch pipes 11 are disposed in cavity of each spherical segment, except for first segment, tangentially with respect to dust-collecting hopper below lower previous spherical segment. EFFECT: increased efficiency of removing dust from air and dissipating residual dust. 3 cl, 2 dwg, 1 tbl