AXIAL FLOW FAN SUPPRESSING LEAKAGE FLOW AND VORTEX

摘要

The present invention relates to an axial flow fan suppressing a leakage flow and a vortex, which suppresses generation of a leakage flow and a vortex by forming a protruding portion at a front margin side of a wing of the fan, and improves air flow efficiency through a bent portion of an outer circumference. More specifically, an axial flow fan coupled to a rotating axis to rotate comprises: a plurality of protruding portions formed on a negative pressure surface of a front margin of each wing of the fan composed of a plurality of wings; a bent portion formed to be bent along an outer circumference of the wings, wherein a dead end is formed at a pressure surface side of the wings; and a curved line portion protruding at a predetermined width in an external side direction at regular intervals toward a hub in which the wings are fixated in a dead end of an outer circumference of the bent portion. Therefore, air flowing in the front margin suppresses generation of a leakage flow generated on a negative pressure surface of the wings by rotation of the wings through the protruding portions, and a vortex of the air flowing through the bend portion formed in a rear margin is reduced.;COPYRIGHT KIPO 2017