A ventilation unit with a rotary closure member for use in a vehicle

摘要

In a ventilation unit, a seal member 30e is provided at a position around a rotation axis of a rotary closure member 30, for sealing the device in an axial direction. The closure member is elastically deformable so that while in an 'inside air only' mode the side wall plates 30c are displaced away from each other by the dynamic pressure of a vehicle travelling applied to the outer wall plate 30b. The displacement of the side wall plates prevents outside air entering the unit in this mode.