| 摘要 |
A bi-directional incoming air flow fan comprises a case in which is mounted a rotor that includes a plurality of rotary blades. The case has top and bottom faces that are respectively provided with a first and second air inlet having approximately a same surface area. A side of the case is further provided with an air outlet. Furthermore, each rotary blade includes upper and lower sides that respectively have an axial flow guiding rib, and a free section that is inclined to form a radial flow section. Thereby, once the rotor (40) is put in rotation, air flow amount and pressure are increased by means of the axial flow guiding ribs (61) that create an uniform air flow. As a result, rotor deviation and floating force are reduced, thereby reducing mechanical frictions and parasitic noise.
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