Air scoop for increasing fan cooling efficiency, has hood with diameter varying in its axial direction, collar with constant diameter, and blade parts at joint of hood and collar, where each part has connecting end connected with hood

摘要

The scoop (10) has a hood (11) with diameter varying in its axial direction, and a collar with constant diameter. A pair of blade parts (13) is provided at a joint of the hood and the collar, where each blade part exhibits a connecting end that is connected with the hood. The hood comprises two pairs of oppositely lying side walls (111, 112) in a trapezoidal shape. The collar comprises two pairs of parallel side walls (121, 122), which are vertically connected with each other.