A FAN BLADE OF AN AXIAL FAN OR A CENTRIFUGAL FAN

摘要

A fan blade of an axial fan or a centrifugal fan comprises a front edge part (1) in an air inflow direction and a back edge part (2) in an air outflow direction, and is characterized in that the back edge part (2) is provided with a plurality of pressure balancing holes (3). Because the back edge part of the fan blade is provided with the plurality of the pressure balancing holes, the fan blade reduces pressure difference between the front and the back of the fan blade, eliminates backflow phenomenon caused by air current separation at a boundary layer of the back edge part, and increases effective functional area of the fan blade, so as to potentially improve power consumption and noise quality, and avoid depositing large amount of dust at the same time.