Air conditioner for automotive vehicle.

摘要

A calculating unit (40) calculates from sensed temperatures of ambient air both outside and inside of the vehicle compartment the desired opening of an air mix door (22) which controls the ratio of heated to cold air driven, into the vehicle compartment. When the output of the calculating unit (40) indicates that the air mix door (22) should be moved to the fully cooling position, a controller (42) moves the air mix door (22) via an actuator (26) in accordance with the output of the calculating unit (40) so as to completely cover the heater (20), thereby preventing air from passing through the heater (20) and from being heated. Shortly after the air mix door (22) has completely covered the heater (20), a second controller (44) cuts off the supply of heating energy to the heater. When, on the contrary, the output of the calculating unit (40) indicates that the air mix door (22) should be moved away from the fully cooling position, the heating energy begins to be conducted into the heater (20), thereby allowing the temperature of the air in the compartment to increase gradually. In an alternative, a signal controller including a mechanical linkage responds to the output of the calculating unit via the controller. When the air mix door should be moved to the fully cooling position, the mechanical linkage pivots the air mix door to the position where the air mix door completely covers the heater. Shortly after that, the linkage continues to move to a position in which the supply of heating energy is stopped.