High efficiency, low noise, axial flow fan

摘要

Band (18) of fan (10) is disposed axially rearwardly of hub (12). Hub is attached to shaft of electric motor (30) which is disposed in mount of shroud (28). Shroud (28) has members (40) extruding from mount to fan-surrounding portion (39) which forms air seal with fan band (18). Members (40) have straight inner portions (40A), curved intermediate portions (40C), and straight outer portions (40B).