| 摘要 |
PURPOSE: An axial fan used in a vehicle is provided to maximize efficiency of the axial fan over a whole area of the axial fan by optimizing an air flow rate from a center of the axial fan to an outer ring or to a blade tip. CONSTITUTION: An axial fan is provided at a center thereof with a hub(10). A plurality of inner blades(16) radially extend from the hub at a predetermined inclined angle. The inner blades are connected to a separation ring(14) installed at a middle part of the axial fan. A plurality of outer blades(18) radially extend from the separation ring at a predetermined inclined angle. A number of the outer blades is more than a number of the inner blades. An interval between the inner blades is optimally maintained so as to optimize an air flow rate over the whole area of the axial fan.
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