MULTI-SWEEP BLADE WITH ABRUPT SWEEP TRANSITION.

摘要

a blade (14) for a fan or blower (10) includes a transition region between the inner area of the sharp blade, which has a leading edge which forms a negative angle of curvature and an outer zone of the blade has a sharp curve in. the outer region of the blade is characterized also by a rope which increases as the radius increases.the fan has a narrow width, as well as significant advantages with respect to the noise and efficiency.