| 摘要 |
An axial flow fan (200) having an axis (R) of rotation comprises a central hub (201 ) comprising a base wall (202) and a lateral wall (203) which projects from the base wall (202) to form a cup-shaped structure, a plurality of blades (204) each fixed to the central hub (201 ) and comprising a leading edge (205) and a trailing edge (206), a plurality of extractors (207) of a fluid which are associated with the base wall (202) for conveying air from the inside of the cup-shaped structure to the outside of the cup- shaped structure through the base wall (202). |
