Apparatus for controlling vehicle air conditioner

Abstract

An apparatus for controlling a vehicle air conditioner having a speed setting mechanism interconnected to the output shaft of an actuator for turning an air mixing shutter so as to switch the blower between low and high speed operations. The cam mechanism has the first rotary part interlocked to the output shaft of the actuator and a response part in response to the rotary part to turn the air mixing shutter. When the output shaft is turned within a predetermined rotary range c set narrower that the entire rotary range of the output shaft, the air mixing shutter can be turned between full cooler and heater positions. The speed setting mechanism brings the blower to a low speed operation when the rotary angle of the output shaft falls within the rotary range c and to a high speed operation when the rotary angle of the output shaft falls outside the rotary range c. The air mixing shutter is terned between full cooler and heater positions within the rotary range c that is set narrower than the entire rotary range of the output shaft. During this period, the blower is held at low speeds. When the rotary position of the output shaft falls outside the rotary range c, the air mixing shutter is held at the full cooler or heater position, while the speed setting mechanism is operated to bring the blower from the low to the high speed operation.