Patent ID: 9127681
Filing Date: 2015-09-08
Classification: B29L,F04D,F05D,Y02T

Abstract:
1. A cross-flow fan comprising a plurality of vane portions provided to be circumferentially spaced apart from each other, each having an inner edge portion arranged on a radially inner side to/from which air flows in/out and an outer edge portion arranged on a radially outer side to/from which air flows in/out, wherein said vane portion has a blade surface extending between said inner edge portion and said outer edge portion and including a pressure surface arranged on a rotation direction side of the cross-flow fan and a suction surface arranged on a back side of said pressure surface, said vane portion has such a blade cross-sectional shape that a concave portion is formed at said pressure surface and said suction surface when said vane portion is cut along a plane orthogonal to a rotation axis of the cross-flow fan, a plurality of said concave portions are formed at at least one of said pressure surface and said suction surface, and the number of said concave portions formed at said pressure surface is greater than the number of said concave portions formed at said suction surface.