Patent ID: 9638195
Date: 2017-05-02
CPC Classifications: F04D,F05D,F24F

Claim:
1. A cross flow fan comprising: a support plate; and an impeller including a plurality of blades disposed on the support plate at predetermined intervals a lengthwise direction cross-sectional shape of each of the blades having a suction surface arc that forms a convex suction surface, a pressure surface arc that forms a concave pressure surface, an inner peripheral side arc that interconnects a first end of the suction surface arc and a first end of the pressure surface are, and an outer peripheral side arc that interconnects a second end of the suction surface arc and a second end of the pressure surface arc, a radius of the pressure surface arc being greater than a radius of the suction surface arc, a radius of the inner peripheral side arc being greater than a radius of the outer peripheral side arc and a region of maximum thickness of the blade being located in a position 40% to 60% from the inner peripheral side arc in the lengthwise direction, to obtain low air turbulence and reduce power loss of the cross flow fan, the blades being disposed such that the inner peripheral side arcs are positioned on an inner peripheral side of the support plate and the outer peripheral side arcs are positioned on an outer peripheral side of the support plate, and a flow path width between the plurality of blades gradually decreasing from the inner peripheral side toward the outer peripheral side of the support plate.