Disclosed is an air conditioner for a vehicle which has inside air intake ports formed on the side surface of a cylindrical intake duct and the side surface of a cylindrical intake door so as to partially inhale inside air during an outside air inflow mode, thereby reducing manufacturing processes and manufacturing costs because there is no need to add a separate component for inhaling inside air in the outside air inflow mode, controlling intake amounts of outside air and inside air through a recess part formed on the outer circumferential surface of the intake door, and enhancing cooling and heating performance by partially inhaling inside air during the outside air inflow mode.

An air vent damper apparatus including first and second retention devices each having a respective body portion. At least one of the retention devices includes at least a first catch member, and at least one of the retention devices includes a second catch member. The first and second catch members define differing damper positions. The apparatus also includes a damper having opposed first and second edges, wherein the damper is pivotally coupled between the first and second retention devices. Each of the first and second edges has a respective third catch member that is magnetically attracted to the first and second catch members the first and second retention devices, such that the damper can be selectively configured in an first position by aligning the third catch member with the first catch member and in a second position by aligning the third catch member with the second catch member.

In a vehicle air conditioning apparatus in which a plurality of air mixing dampers that are driven independently of each other have a drive shaft having a double-shaft structure. A hollow drive shaft of one damper is penetrated by a solid drive shaft of another damper. A first shaft-center immobilizing mechanism that secures a shaft center of the hollow drive shaft is provided between a side surface of the unit casing, to which the drive shaft having the double-shaft structure is supported in a freely rotatable manner. And a gear provided at a shaft end of the hollow drive shaft.