| 摘要 |
PROBLEM TO BE SOLVED: To generate sufficient fluid flow in both normal and reverse rotating directions without increasing the rotating speed of a reversible fluid blade 5. SOLUTION: In this normal-reverse rotating reversible fluid blades 5 of the reversible fan 10, a wall thickness centerline is symmetrically continuous on the opposite sides with the cross direction center held in between so as to efficiently obtain specified fluid flow in both directions. The sufficient quantity of air can be obtained at the rotating speed not causing noise, without enlarging the diameter of the fan or using two-stage blades, and sufficient fluid flow can be generated in both normal and reverse rotating directions without increasing the rotating speed of the reversible fluid blade 5.
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