Abstract: A method for air conditioning for vehicles comprising a step of detecting a temperature of a passenger compartment of a vehicle, an atmospheric temperature and a preset temperature in the initial period of air conditioning, a step of judging the results of comparisons between said temperatures and a step of switching between air conditioning by the circulation of inside air and air conditioning by the introduction of outside air.

Abstract: A vehicle-mounted air conditioner includes a compressor which, when powered by the vehicle engine, supplies pressurized refrigerant to an evaporator to increase its cooling capacity, a heating unit located downstream of the evaporator and partially occupying the passage of air cooled and directed toward vehicle interior by the evaporator, and a mixing damper pivoted at a point upstream of the heating unit to adjust the amount of cool air presented thereto in relation to the air directed toward the vehicle interior. The compressor is coupled to the engine when the temperature in the vehicle interior indicates a demand for a temperature decrement, or decoupled from the engine when the interior temperature indicates a demand for a temperature increment. A control system detects when the compressor is switched from a first operating state to a second state and initiates a timing action to measure the elapse of time from the time of detection of the occurrence of the transient condition.

Abstract: In control of the cooling ability of an automobile air conditioner, an electric control method comprises the steps of detecting a deviation between the actual in-car temperature and a desired value upon each lapse of a predetermined period of time, comparing the detected deviation with a predetermined value and maintaining the cooling ability of the air conditioner when the detected deviation is larger than the predetermined value, comparing the detected deviation with the preceding detected deviation when the detected deviation is smaller than or equal to the predetermined value and maintaining the cooling ability of the air conditioner when the detected deviation is larger than or equal to the preceding detected deviation, decreasing the cooling ability of the air conditioner when the detected deviation is smaller than the preceding detected deviation, and increasing the cooling ability of the air conditioner when the detected deviation is larger than each of the predetermined value and the preceding detect