MULTIBLADE CENTRIFUGAL FAN AND MULTIBLADE CENTRIFUGAL BLOWER INCLUDING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a multiblade fan suppressing degradation in fluid noise without increasing the number of components and a multiblade centrifugal blower including the same.SOLUTION: A multiblade centrifugal fan includes: a hub 4 having a circular outer circumference; a boss portion 3 formed at the center part of the hub 4 and having a drive shaft hole 3a into which a drive shaft 2a is inserted; a blade portion 5 including a plurality of blades 5a provided on the outer circumference of the hub 4 at intervals; and a bridge 8 coupling the adjacent blades 5a. The bridge 8 is gradually thinner from a rounded front edge 8a located upstream of air flowing between the blades 5a toward a rear edge 8b located downstream of the air flowing between the blades 5a.