| 摘要 |
PROBLEM TO BE SOLVED: To secure strength of an air blowing grill, and to suppress noise and pressure loss increase even when an air flow direction changes.SOLUTION: An air blowing grill 20 includes: a rib 23 provided so that an airflow passes through; and a vortex generator 24 provided on a side surface of the rib 23 and for adjusting an airflow so that vertical vortex generates in the airflow. The vortex generator 24 has a first surface which faces an upstream side of the airflow and a second surface which is connected to the first surface and which faces a downstream side of the airflow. An end point of a ridge line generating by the connection of the first surface and the second surface is located further on the downstream side of the airflow than a center of the ridge line. On a cut surface cut at each flat surface vertical to the ridge line, length of a perpendicular down from a point belonging to the ridge line to a straight line connecting an end point of a line of intersection between the first surface and the cut surface, and two end points which do not belong to the ridge line out of end points of a line of intersection between the second surface and each cut surface, is longer than the length of a perpendicular down to the straight line from the point belonging to the line of intersection between the first surface and the cut surface other than the point belonging to the ridge line, and the point belonging to the line of intersection between the second surface and the cut surface other than the point belonging to the ridge line. |
