Cross-flow fan and air conditioner

摘要

A cross-flow fan comprises: blade wheel units (8d) provided with circular plate-like support plates (8b) having a rotation center located at the center section thereof, and also with blades (8c) which are arranged along the outer peripheries of the support plates (8b), extend in the direction of the rotation axis, and each have both ends supported by the support plates (8b); a blade wheel (8a) comprising the blade wheel units (8d) secured in the direction of the rotation axis; and grooves (14) which are provided in negative pressure surfaces (13a) of the blades (8c), the negative pressure surfaces (13a) being the rear surfaces of the blades (8c) relative to the rotational direction, and which extend in the direction of the rotation axis. The grooves (14) are separated from each other with predetermined intervals therebetween so that a flat section (M) is provided between adjacent grooves (14).