VEHICULAR AIR CONDITIONER, VEHICLE PROVIDED WITH SAME, AND METHOD FOR CONTROLLING VEHICULAR AIR CONDITIONER

A vehicle air conditioning apparatus 10 includes: a refrigerant circuit 11 in which a compressor 21, a heat source side heat exchanger 23, an expansion device 24, and a load side heat exchanger 25 are connected by pipes; and a controller that performs switching between a heating operation in which refrigerant in the refrigerant circuit 11 circulates and a defrosting operation of the heat source side heat exchanger 23 in which the refrigerant in the refrigerant circuit 11 circulates in a direction opposite to a direction in the heating operation. The controller produces an airflow flowing from the load side heat exchanger 25 into a cabin through a first air outlet 5 in the heating operation, and an airflow flowing from the cabin into the load side heat exchanger 25 through the first air outlet 5 is produced in the defrosting operation of the heat source side heat exchanger 23.