| 摘要 |
A fan wheel includes a main body and an axle connected to a center of the main body. The main body includes a peripheral wall provided around an axial axis thereof. A number of upper blades and lower blades are mounted to the peripheral wall. Each upper blade extends in a direction at an angle with the axial axis, while each lower blade extends in a direction substantially parallel to the axial axis. When the main body rotates, the axial blades drive air along the axial axis, and the blower blades drive air along a plane perpendicular to the axial axis.
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