Patent ID: 8579577
Filing Date: 2013-11-12
Classification: F04D

Abstract:
1. A fan with a sound deadening box, the fan comprising: a box-shaped body having a body air inlet and a body air outlet facing each other; a double inlet centrifugal fan disposed in the body, the double inlet centrifugal fan including: an inlet-port sound absorber disposed between the body air inlet and the double inlet centrifugal fan; casing-inlet-port-side air passages formed in spaces between the body air inlet and the casing inlet ports, the spaces being sandwiched between the double inlet centrifugal fan and inner surfaces of the body that face the casing inlet ports; and a first inlet-port-sound-absorber air passage formed to have a triangular prism shape by cutting a corner of a ridge line of the inlet-port sound absorber.