| 摘要 |
PROBLEM TO BE SOLVED: To provide an axial flow fan for an air-conditioner to reduce the generation of noise and increase efficiency by effectively reducing the generation of power consumption and noise of a motor simultaneously with the generation of capacity sufficient to effect heat-exchange by changing the shape of a blade. SOLUTION: This fan comprises a hub (BH) coupled to the rotary shaft of a motor; and a plurality of blades 2 coupled to the hub (BH). Provided a coordinate available when a distance (R) in the radial direction of each blade 2 is brought into a dimensionless state to a distance from a radius (Rh) at the hub (BH) to a radius (Rt) at a blade tip (BT) is (r), an expression of (r=(R-Rh)/Rt-Rh) is satisfied. A maximum camber ratio Hc (r) being a ratio between a maximum camber(Cmax) and a chord length (1) has a maximum value of 0.02±0.01 at a hub (BH) of r=0, maximum value of 0.04±0.015 at the blade tip (BT) of r=1, and a maximum value of 0.05±0.02 at a post of r=0.6-0.75.
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