| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an impeller having a blade form suited to air flow, and a centrifugal fan provided therewith. <P>SOLUTION: The centrifugal fan has the impeller including a main plate, a shroud and a plurality of blades provided between the main plate and the shroud and arranged on a circumference. The impeller can rotate around a rotary shaft. The plurality of blades have a pressure face 2a and a negative pressure face 2b, and have a shape, when viewing the pressure face 2a from the extending direction of the rotary shaft, of connecting at least three kinds of arcs (R1, R2, R3), or a shape shown by combining a plurality of high-order functions passing through three points (A, B, C). <P>COPYRIGHT: (C)2013,JPO&INPIT |
