| 摘要 |
PROBLEM TO BE SOLVED: To reduce a pressure loss by a front fin, increase an air quantity, reduce a sound and ensure the directivity of the wind direction, when the vertical width of a ventilation trunk is set small. SOLUTION: Front fins 181, 183 of both ends are closely arranged along the end of a ventilation trunk 2 respectively and divided to front side divided pieces 22, 24 and rear side divided pieces 23, 25. Front side connection rods 28, 30 and rear side connection rods 29, 31 hold the front side divided piece of the front fin positioned in the shaken direction to the state pointing the straight front side and also turn the rear side divided piece following to the turn of central front fin 182, out of the front fins 181, 183 of both ends, when a front louver 20 is shaken, while out of front fins 181, 183 of both ends, the front side divided piece of the front fin positioned at the side opposite to the shaken direction is turned following to the turn of the central front fin 182 and also the rear side divided piece is held in the state pointing the straight front side.
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