VEHICULAR AIR CONDITIONING APPARATUS

A vehicular air conditioning apparatus (1) is provided with: an air conditioning unit (10) installed in the interior of a vehicle and generating conditioned air; and a conditioned air supply unit (50)for supplying the interior of the vehicle with the conditioned air generated in the air conditioning unit. The air conditioning unit is configured to include a refrigeration cycle device (20) that has a compressor (21), a radiator (22), a decompressor (23), and an evaporator (24). The refrigeration cycle device is configured such that a heat exchanger in one among the radiator and the evaporatorfunctions as a use-side heat exchanger for generating conditioned air through heat exchange between a refrigerant and air. Also, the refrigeration cycle device has a high pressure protection device (30) for discharging the refrigerant to the outside when the pressure of the refrigerant flowing from a refrigerant ejection side of the compressor to a refrigerant inlet side of the decompressor through a high pressure refriger