| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve a problem in a conventional air blower that, because two flows of an incoming flow and an outgoing flow are generated at a blade while a fan rotates one rotation, a blade suitably formed for an incoming flow has a narrower flow path width and an increased loss, and on the other hand, a blade suitably formed for an outgoing flow causes the separation of a flow from a blade surface and generates increased noise. <P>SOLUTION: The air blower has a fan constituted of a plurality of blades. The plurality of blades are disposed at equal distances from a rotational axis of the fan. If a concentric circle having the rotational axis as the center is partitioned by adjacent blades, minimum values of arc lengths are substantially the same with respect to respective lengths between the adjacent blades of the plurality of blades. A position of a maximum thickness in a cross section on a rotational plane of the fan is positioned on a circumference of a concentric circle which passes through the center position of the plurality of blades or the center side. The position of the maximum thickness is different for each of the adjacent blades of the plurality of blades. <P>COPYRIGHT: (C)2012,JPO&INPIT |
