Patent ID: 6837307

Claim:
An air conditioner for a vehicle comprising: an air conditioning case defining a plurality of air passages through which air flows into a passenger compartment of the vehicle; a heating heat exchanger for heating air in the air passages; a plurality of air mixing doors disposed in the air passages, respectively, each of the air mixing doors being for adjusting a flow amount ratio of air heated by the heating heat exchanger to air bypassing the heating heat exchanger; a hot water valve for adjusting a flow amount of hot water circulated to the heating heat exchanger; a plurality of driving devices connected to the air mixing doors, for independently driving the air mixing doors, respectively; and a link mechanism connected to one of the driving devices and one of the air mixing doors, the link mechanism being also connected to the hot water valve, wherein: the link mechanism is constructed to be operated to a first maximum cooling position where the one air mixing door connected to the link mechanism is positioned at a door maximum cooling position and the hot water valve is opened, and to be operated to a second maximum cooling position where the one air mixing door connected to the link mechanism is positioned at the door maximum cooling position and the hot water valve is closed; when the one air mixing door connected to the link mechanism is operated to the door maximum cooling position and an another air mixing door different from the one air mixing door is operated to a position different from the door maximum cooling position, the link mechanism is displaced to the first maximum cooling position; and when all the air mixing doors are operated to the door maximum cooling positions, the link mechanism is displaced to the second maximum cooling position.