FAN FOR A MOTOR VEHICLE, HAVING ACOUSTICALLY AND AERODYNAMICALLY OPTIMIZED BLADES

摘要

The invention relates to a ventilation impeller (1) comprising a hub (9) and blades (11) extending radially outwards from the hub (9) between a blade root (11a) and a blade head (11b), said blades (11) comprising a first, a second and a third portion, said first portion extending outwards from said blade root (11a), the third portion extending inwards from said blade head (11b) and the second portion extending between the first and the third portion. The impeller is characterised in that said blades (11) have a backward curvature in said second portion, combined with a zero curvature or a forward curvature in said first portion and/or a zero curvature in said third portion.