| 摘要 |
<p>The present invention relates to a casing of a blower like a smoke exhaust fan which forcibly inhales and discharges toxic gas generated at a work. And the casing comprises: a tubular casing main body which is opened to the either side so that air can circulate; a plurality of guide vanes which are protruded from the inner periphery of the casing main body; and a settling pedestal which is connected in one with an inner end part of the each guide vane in order to mount a motor, wherein the casing main body, the guide vane, and the settling pedestal are injection-molded of a plastic material into one body.</p> |
