Patent ID: 7699096

Claim:
An air conditioner for vehicle use comprising: a first air passage for blowing out conditioned air into a first region in a passenger compartment; a second air passage for blowing out conditioned air into a second region in the passenger compartment; a single blower for sending a flow of conditioned air into the first and the second air passage; the first air passage including a first cold air flow passage, in which a cold air flow flows, and a first hot air flow passage, in which a hot air flow flows, the first cold air flow passage and the first hot air flow passage being arranged in parallel with each other, the first air passage further including a first cold air flow door for opening and closing the first cold air flow passage and also including a first hot air flow door for opening and closing the first hot air flow passage, the second air passage including a second cold air flow passage, in which a cold air flow flows, and a second hot air flow passage, in which a hot air flow flows, the second cold air flow passage and the second hot air flow passage being arranged in parallel with each other, the second air passage further including a second cold air flow door for opening and closing the second cold air flow passage and also including a second hot air flow door for opening and closing the second hot air flow passage, wherein means for adjusting a ratio of the volume of the cold air flow in the first cold air flow passage to the volume of the hot air flow in the first hot air flow passage by the first cold air flow door and the first hot air flow door so as to adjust a blowout air flow temperature of the air blowing out from the first air passage into the first region, means for adjusting a ratio of the volume of the cold air flow in the second cold air flow passage to the volume of the hot air flow in the second hot air flow passage by the second cold air flow door and the second hot air flow door so as to adjust a blowout air flow temperature of the air blowing out from the second air passage into the second region, means for independently calculating a first air flow volume control value (VBL) corresponding to a target blowout air flow volume on the first air passage side and a second air flow volume control value (VBR) corresponding to a target blowout air flow volume on the second air passage side, means for determining an air flow volume of the blower according to the first air flow volume control value (VBL) and the second air flow volume control value (VBR), and means for throttling, while the ratio of the volume of the cold air flow to the volume of the hot air flow determined by the cold air flow door and the hot air flow door is maintained constant, an opening area of the passage by the cold air flow door and the hot air flow door in an air passage to which a lower air flow volume control value between the first air flow volume control value and the second air flow volume control value is applied.