| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ventilation hood capable of being miniaturized and preventing the contamination of a wall surface without impairing the ventilating performance. <P>SOLUTION: A plurality of louvers formed on a ventilating hole, are mounted on an outer peripheral face of a cylindrical body, in a state that the plurality of louvers at an indoor side have an acute inclination angle toward the outside, and the louvers at an outdoor side have an obtuse inclination angle to keep a specific opening area, whereby the contamination of the wall surface can be prevented even when a distance from the wall surface to the ventilating hole is shortened. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
