| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent turbulent flow by suppressing shaking at an opening position of a shutter, and improving stability of product performance.SOLUTION: An adaptor structure 100 of a ventilator includes an elliptic metallic adaptor 200, and an elliptic shutter 300 disposed inside of the metallic adaptor 200 and fitted to the shape of the metallic adaptor 200. A symmetric axis in the horizontal direction of a longitudinal cross-section of the elliptic shutter 300 is a long axis, and a symmetric axis in the vertical direction is a short axis. The shutter 300 is rotated in the metallic adaptor 200 by a rotating shaft 230, a curvature point is disposed between a projection point in a short axis of a central line of the rotating shaft 230, and a tail portion 360 of the shutter 300, and the shutter 300 is curved toward an inner surface side of the shutter 300 from the curvature point along the short axis to form a curved portion 390.</p> |
