FAN Russian patent published in 2000 - IPC

FIELD: mechanical engineering; centrifugal fans. SUBSTANCE: proposed fan makes it possible to separate ecologically harmful components from gas in field of action of centrifugal forces and to return these components into pneumatic system for reuse. Impeller of fan in its peripheral part communicates with chamber made in housing behind rear wall and is provided with additional radial blades. On periphery of chamber enclosing additional radial blades spiral groove is made whose turns are directed to side opposite to direction of impeller rotation and communicate with outlet channel furnished with jet. Root part of chamber communicates with additional outlet channel. EFFECT: protection of ambient atmosphere from contamination, increased reliability of fan. 1 dwg