AXIAL FLOW FAN FOR CIRCULATING COLD AIR IN REFRIGERATOR

摘要

PURPOSE: An axial flow fan for circulating cold air in a refrigerator is provided to reduce noise by optimizing design parameters of the axial flow fan, such as the number of blades, and a sweep angle of the blade. CONSTITUTION: An axial flow fan(54) includes a hub(54a) connected to a rotating shaft of a motor, and a plurality of blades(54b) installed around the hub(54a) while forming a predetermined interval. The blade(54b) has a leading edge and a trailing edge. A blade tip and a blade hub are formed at inner and outer peripheral portions of the blade(54b). The number of blades and a sweep angle of the axial flow fan(54) are relative to noise, so that seven blades(54b) are provided to reduce noise and the sweep angle of the axial flow fan(54) is formed in a range of about 50 to 65 degrees.