IMPELLER FOR SIROCCO FAN AND SIROCCO FAN

摘要

PROBLEM TO BE SOLVED: To provide an impeller for a Sirocco fan (multi-vane blower) improving a strength of the impeller while preventing increase in noise.;SOLUTION: An impeller 2 includes: a disk-like main plate 6 rotating about a rotating shaft O; a plurality of vanes 4 disposed annularly on the main plate 6 and each having a terminal fixed to an outer circumferential part of the main plate; and a ring 3 connecting other ends of the vanes 4 with an outer edge of the main plate. A dimension of the ring 3 in a direction of the rotating shaft is enlarged at a side separating from the main plate 6, and enlarged at a side separating the other ends of the vanes 4 from the main plate 6 gradually from inner edges to outer edges, and end faces of outer edges of the vanes 4 are continued to an end face of the ring 3.;COPYRIGHT: (C)2013,JPO&INPIT