REVERSIBLE EJECTOR FAN PLANT Russian patent published in 2002 - IPC

FIELD: manufacture of fans, airing of ventilation networks. SUBSTANCE: reversible ejector fan plant is fitted with reversible fan and mixing chamber comprising contraction attached to inlet hole of cylindrical part and diffuser mounted at outlet from cylindrical art. Contraction and diffuser are manufactured identical by mirror design. Working fan is mounted on side of contraction and its outlet hole is located in same cross-section as outlet hole of contraction. Reversible fan is mounted on side of diffuser and its outlet hole is located in same cross-section as outlet hole of diffuser. All units are mounted uniaxially one to another and along center of mine working, along its longitudinal axis. EFFECT: enhanced supply of fresh air into section of ventilation network with fan productivity above rated value thanks to ejection effect, provision for stable aerodynamic parameters of reversible ejector fan plant both under forward and reversible mode of operation. 1 dwg