| 摘要 |
A cross flow fan (1) for an air conditioner capable of reducing a load on a motor while reducing the noise of a blower, comprising a plurality of blades (2theta1, 2theta2) and support plates (3, 4) pivotally supporting the plurality of blades (2theta1, 2theta2) at both ends thereof, characterized in that the plurality of blades (2theta1, 2theta2) are disposed annularly on the support plates so as to form a cyclic pseudo-random series while maintaining a periodicity at two different pitch angles (theta1, theta2) so that, when a displacement Delta as the ratio of a difference (theta1 - theta2) between the two pitch angles to a pitch angle (theta) when all blades are disposed at equal intervals is Delta = (theta1 - theta2)/theta, the displacement Delta is 0.09 <= Delta <= 0.26. |
