AIR-BLOWING DEVICE

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). The inner-peripheral-wall surface of an end (34) of a cylindrical part (31) at the downstream side of the airflow is provided further outwards in the radial direction from the rotational axis of the air-blowing fan (40) than an end of the ring part (43) at the downstream side of the airflow. The end (34) of the cylindrical part (31) at the downstream side of the airflow is configured so as to be positioned further outwards in the radial direction from the rotational axis, as said end (34) extends towards the downstream 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.