CENTRIFUGAL FAN Russian patent published in 1999 - IPC

FIELD: fan manufacture. SUBSTANCE: centrifugal fan is provided with guide vane arranged on external wall of admission pipe and made in the form of bent segmental plate whose entrance and exit angles and angle of inclination at root section relative to diametral plane, as well as angle between conical part of cover disk and tangent to curvilinear section at admission pipe outlet are matched with aerodynamics of vortex air flow. EFFECT: improved design. 3 dwg