FILTER-CYCLONE Russian patent published in 2002 - IPC

FIELD: air purifying equipment. SUBSTANCE: double-staged filter cyclone has cyclone, filter with grainy filtering charge, dust discharge device, dust-laden air supplying branch pipe and purified air discharge branch pipe. Cyclone with reverse cone is arranged above filter containing filtering member placed inside filter casing in spaced relation to casing wall and is composed of two coaxially arranged baffle-type grids within which grainy filtering material is arranged. Baffles of grid are made in the form of plates joined to grid inner walls and oriented toward dust discharge device at angle of rest. Dust discharge device formed as cone and equipped with weight dozer is positioned under filter. Apparatus provides for effective dust catching and self recovery of filtering layer, with large-sized and average-sized dust fractions caught by cyclone being used as grainy filtering material. EFFECT: enhanced reliability in operation and increased efficiency in air purification. 2 dwg