| 摘要 |
<p>A fan of the present invention comprises: a case as a frame having an internal space, a first opening formed in the middle thereof, and inlet and outlet holes formed in the inner and outer surfaces of the periphery of the frame; a rotational part with blades mounted in the internal space, the blades being rotated by a power means to draw external air through the inlet holes into the internal space and to discharge it through the outlet holes; and a cover mounted on the front of the case and provided with a second opening communicating with the first opening so as to discharge the air from the inside of the second opening through the outlet holes towards the outside</p> |
