REFRIGERATION CYCLE DEVICE

摘要

A refrigeration cycle apparatus 100 is provided with a refrigerant circuit including at least a compressor 1, a condenser, an expansion device 3, and an evaporator, where an ethylene based fluorohydrocarbon or a mixture containing the ethylene based fluorohydrocarbon is used as refrigerant, a controller 52 configured to control a rotation speed of the compressor 1 and an opening degree of the expansion device 3, a clogging amount detection device (memory 51 and computation unit 53) configured to detect a clogging amount of the expansion device 3, and a polymerization amount estimation device (strainers 3a and 3b) used for estimating an amount made up by a product generated through polymerization of the refrigerant in substances causing clogging of the expansion device 3.