DAMPER, AIR CONDITIONING UNIT, AND VEHICULAR AIR CONDITIONING

摘要

A damper, an air conditioning unit and a vehicular air conditioning system are provided to suppress the abnormal noise or air noise at the small opening of the damper. The damper includes a wall surface (33) which forms an air flow passage, a stationary portion (35) which extends from the wall surface (33) to the center of a flow passage (23), and a rotating portion (25) rotatably disposed in the flow passage (23), having one end (29) in contact with a portion of the stationary portion (35) at a downstream side of an air flow through the flow passage (23). A curved wall portion (45) as a convex curved surface protruding to the center of the flow passage (23) is formed on a position of the wall surface (33) on which the air flow passing between the one end (29) and the stationary portion (35) impinges.