Air conditioner for vehicle

An air conditioner for a vehicle, in which a draft duct in an air conditioning unit is divided into a plurality of divided passages upstream from a heater core, and

• the plurality of divided passages includes a plurality of warm air passages passing through the heater core, a plurality of cool air passages bypassing the heater core, and a plurality of air mix doors each controlling a ratio between an amount of air passing through one of the warm air passages and an amount of air passing through one of the cool air passages,
• the air conditioner comprising:
• a first air mix door and a second air mix door included in the plurality of air mix doors;
• a first slide system that includes a first drive gear meshed with a first rack on the first air mix door, a first support shaft on which the first drive gear is fixed, and a first actuator connected with the first support shaft, and that slides the first air mix door by rotating the first support shaft using the first actuator, a drive force of the first actuator transmitted to the first air mix door via the first support shaft, the first drive gear, and the first rack on the first air mix door in order of the first support shaft, the first drive gear, and the first rack;
• and
• a second slide system that includes a second drive gear meshed with a second rack on the second air mix door, a second support shaft on which the second drive gear is fixed, a primary auxiliary gear fixed on the second support shaft, a secondary auxiliary gear meshed with the primary auxiliary gear, an auxiliary support shaft on which the secondary auxiliary gear is fixed, and a second actuator connected with the auxiliary support shaft, and that slides the second air mix door by rotating the auxiliary support shaft using the second actuator, a drive force of the second actuator transmitted to the second air mix door via the auxiliary support shaft, the secondary auxiliary gear, the primary auxiliary gear, the second support shaft, and the second rack on the second air mix door in order of the auxiliary support shaft, the secondary auxiliary gear, the primary auxiliary gear, the second support shaft, and the second rack,
• wherein the auxiliary support shaft is parallel to the first support shaft and the second support shaft and is not coaxial with the first support shaft and the second support shaft.