| 摘要 |
<p>PURPOSE:To prevent the formation of dew on wind direction vane in the center of an outlet when the left and the right outlet sides of the wind direction vane are both turned to outside. CONSTITUTION:A pair of connecting shafts 8 are provided projecting from the positions in which connecting bars 3L and 3R at left and right of a wind direction vane are close to each other and are passed through connecting elongated holes 9L and 9R provided at left and right of a connecting arm 7 and, when the wind direction vane is rotated to outside, the connecting shafts 8 interfere with the connecting elongated holes 9L and 9R in order to restrain the mutual inclination angle of the wind direction vane and retain a gap distance (a') between left and right of the wind direction vane at a specific or greater dimension. Therefore, the dew formation of the wind direction vane caused by a second air that turns around behind the vane.</p> |
