Air intake control system in air conditioning system

摘要

An intake control system comprising a mode selector which receives a first control pressure and a second control pressure, and, according to the temperature inside and outside the vehicle, adapted to supply selectively a plurality of different combinations of the first and second control pressures to a pressure activated actuator to switch an air intake system between at least an outside air position and a recirculating air position. An air intake changeover switch receives the pressure output by an air control switch, a first reference pressure and a second reference pressure, and supplies a certain combination thereof as the first and second control pressures, when operated, to the mode selector, thereby causing the actuator to switch the air intake system to the recirculating air position, irrespective of the switching state of the mode selector.