Patent ID: 8688322

Claim:
An air conditioner for a vehicle having an in-vehicle equipment which outputs heating energy for heating air to be blown into a vehicle compartment of the vehicle, in which a temperature of the in-vehicle equipment is adjusted to be within a predetermined standard range, and an operational efficiency (Î·e) of the in-vehicle equipment is controlled such that a fuel consumption of the in-vehicle equipment approaches a smallest amount when the in-vehicle equipment is operated, the air conditioner comprising: a first heating portion arranged in a circulation circuit through which a heat medium heated by waste heat of the in-vehicle equipment circulates, the first heating portion heating air to be blown into the vehicle compartment by using the heat medium as a heat source; a second heating portion configured to heat the blown air by using the heating energy outputted from the in-vehicle equipment; a determination portion configured to determine a target heat amount ratio that is a target value of a heat amount ratio (hm 2 /hm 1 ), the heat amount ratio (hm 2 /hm 1 ) being a ratio of a second heat amount (hm 2 ) used for heating the blown air in the second heating portion to a first heat amount (hm 1 ) used for heating the blown air in the first heating portion; and a heating adjustment portion configured to adjust at least one of the first heat amount (hm 1 ) and the second heat amount (hm 2 ) such that the heat amount ratio (hm 2 /hm 1 ) approaches the target heat amount ratio, wherein the determination portion causes the target heat amount ratio to be increased in accordance with an increase of the operational efficiency (Î·e); and the heating adjustment portion increases the second heat amount and decreases the first heat amount in accordance with the increase of the operational efficiency and the target heat amount ratio.