| 摘要 |
An air-blowing fan (40) is provided with: a plurality of blades (42) which extend radially from a boss part (41) provided at the rotational centre, and which are disposed at a distance from each other in the rotational direction; and a ring part (43) which annularly connects outer peripheral ends of the plurality of blades (42). A radially-outward end (45) of an end section of the ring part (43) at the upstream side of the airflow is positioned further outward in the radial direction from the rotational axis of the air-blowing fan (40), as said end (45) extends towards the upstream side of the airflow. As a result, in this air-blowing device, the formation of vortices in the reverse airflow can be inhibited, and noise can be reduced. |
