Patent ID: 8235668
Filing Date: 2012-08-07
Classification: F04D

Abstract:
1. A multiblade air blower comprising: a multiblade impeller including a main plate and a plurality of blades, each of which has a blade end face, being provided at the main plate and forming a blade inner periphery; a casing housing the multiblade impeller; an orifice including: an axially overlaid portion where the orifice and the plurality of blades are overlaid; and the impeller further including an airflow collision prevention device provided at each of the plurality of blades, and the airflow collision prevention device is provided at an inner side of the orifice inner periphery, wherein the airflow collision prevention device is a forward-tilted portion provided at a corner of the blade end face and an inner peripheral end of each of the plurality of blades, and wherein the forward-tilted portion provided at the corner is tilted forward from another portion of the inner peripheral end.