CROSSFLOW FAN HAVING UNEVEN PITCH

摘要

PURPOSE: A crossflow fan having uneven pitch is provided to reduce vibration of the crossflow fan while reducing noise generated from the crossflow fan by irregularly arranging a pitch of the crossflow fan. CONSTITUTION: A crossflow fan(10) having an uneven pitch includes a plurality of blades(12), which is arranged in a clockwise direction about the rotating center of the crossflow fan(10). A pitch angle of the blades(12) is defined as an angle formed by a phantom line connecting inner portions of the blades(12). An accumulated pitch angle is defined as a pitch angle formed by a phantom line connecting a predetermined blade to other blades. The crossflow fan(10) has 32 blades(12).