Vehicle air conditioner with rotary switching door

A vehicle air conditioner comprising:

• a cooling heat exchanger for cooling air;
• a heating heat exchanger for heating air;
• a cooled air passage through which cooled air cooled by the cooling heat exchanger flows;
• a heated air passage through which heated air heated by the heating heat exchanger flows;
• an intersecting portion to which the cooled air passage and the heated air passage are connected;
• a cylindrical rotary door provided at the intersecting portion having a plurality of openings and partition walls at its periphery;
• and
• a plurality of blow-out openings provided at a downstream side with respect to the intersecting portion for blowing the conditioned air to a passenger compartment of the vehicle, wherein:
• a communicating area ratio between an inlet-side opening among the plurality of openings and at least one of the cooled air passage and the heated air passage changes by a rotation of the rotary door so that the rotary door serves as an air mixing device, while a communicating area ratio between an outlet-side opening among the plurality of openings and at least one of the blow-out openings so that the rotary door serves as a mode switching door at the same time;
• the rotary door has a rotated position where the conditioned air is prevented from being blown out through the plurality of blow-out openings by the partition wall;
• and
• the plurality of blow-out openings includes a face opening and a foot opening.