DEVICE FOR PROTECTING AN AIR CONDITIONING SYSTEM OF A VEHICLE

A device protects a vehicle air conditioning system and includes a pressure estimator to estimate a compressor refrigerant discharge pressure based on predetermined vehicle and air conditioning system information. The device includes a pressure switch to selectively transmit a cutting-off request signal for cutting off driving of the compressor depending on the compressor refrigerant discharge pressure. The device includes a controller to determine whether to allow the compressor to be driven based on the estimation discharge pressure determined by the pressure estimator and whether the pressure switch has transmitted a cutting-off request signal.