VEHICLE AIR-CONDITIONING APPARATUS RENEWING METHOD, AND VEHICLE AIR-CONDITIONING APPARATUS

摘要

A vehicle air-conditioning apparatus renewing method for renewing a first air-conditioning apparatus which is installed in a frame mounted on a vehicle and that uses HCFC or CFC refrigerant by installing a second air-conditioning apparatus (100b) that uses HFC refrigerant in the frame includes: a detaching step of detaching at least a compressor, an outdoor heat exchanger, a depressurizing means, and an indoor heat exchanger of the first air-conditioning apparatus from the frame; an assembling step of configuring the second air-conditioning apparatus by disposing a compressor (11b), an outdoor heat exchanger (14b), a depressurizing means (13b), and an indoor heat exchanger (12b) at predetermined positions in the frame; and a loading step of loading the second air-conditioning apparatus installed in the frame with HFC refrigerant. By an inverter for driving the compressor disposed in the first air-conditioning apparatus, the compressor (11b) is controlled on the basis of a measurement value from at least one of a pressure sensor disposed on the discharge side of the compressor (11b) or an outside air temperature sensor. The amount of refrigerant circulated in the second air-conditioning apparatus is increased compared with the first air-conditioning apparatus.