GEBLÄSE MIT GROSSER FÖRDERLEISTUNG.

摘要

The invention features an axial fan for passing air through a heat exchanger, the fan comprising a hub rotatable on an axis and a plurality of blades, each of which extend radially outward from a root portion attached to the hub to a tip portion, the blades characterized by a trailing edge angle that varies by approximately 40 DEG or more over the radial extent of each blade. The blade trailing edge angle is preferably greater than 60 DEG at the root region.