| 摘要 |
A curved section (12) is provided at a proximal end of a fan (10), so that a rotation locus thereof is configured in a shape conforming to a flow of a cooling air such as center-dented. Accordingly, the cooling air can be smoothly sucked in by the fan (10) as well as fan shroud along an arcuate section on an inlet side. Further, since natural flow toward radially outward flow of the cooling air can be guided by an arcuate section on an outlet side, thus smoothly discharging the cooling air. Therefore, the flow of the cooling air can be made smooth entirely from upstream to downstream, thus increasing flow rate and reducing noise. |
