| 摘要 |
PROBLEM TO BE SOLVED: To provide an air duct that has an inlet and outlet having a different opening shape from each other, in which the inlet and outlet are connected by a passage space having a shape bent at least at one portion, and can reduce a relative decrease in wind speed of an air exhausted from the outlet at a part of the outlet, even when the wind speed of the air exhausted from the outlet is increased, without requiring a change in the shape and structure of the passage space.SOLUTION: An air duct has a plurality of suppression parts for suppressing a flow of air at different positions from each other in a direction to flow the air in a passage space of a passage part connecting an inlet and outlet. The passage part is bent at bent passage parts; at least one of the bent passage parts has an inner wall surface provided on the inside thereof in a bent direction; and the inner wall surface has a plurality of protrusions or recesses provided at least on a part of a curved surface part and a part of a plane part provided immediately before the curved surface part. |
