UPDATING METHOD FOR VEHICLE AIR CONDITIONING DEVICE AND VEHICLE AIR CONDITIONING DEVICE

摘要

A renewal method of an air-conditioning unit for a vehicle in which an air-conditioning unit for a vehicle (100a) using a former refrigerant disposed in a frame (8) mounted on a vehicle (1) is renewed to an air-conditioning unit for a vehicle (100b) using an alternative refrigerant, the renewal method including a removal step of: a removing the air-conditioning unit for a vehicle (100a) from the frame (8); an assembly step of disposing the air-conditioning unit for a vehicle (100b), which is configured so as to be capable of fitting in the frame (8), in the frame (8); and a filling step of filling the alternative refrigerant into the air-conditioning unit for a vehicle (100b). The circulating amount of refrigerant in the air-conditioning unit for a vehicle (100b) is increased so as to be larger than that in the air-conditioning unit for a vehicle (100a), and the heat exchange capacity per unit volume of each of the indoor heat exchanger (12b) and the outdoor heat exchanger (14b) is made larger than that before the renewal.