HEAT PUMP HOT-WATER SUPPLY DEVICE

摘要

A heat pump hot-water supply device (100) executes a reverse defrosting operation by leading a discharged refrigerant from a compressor (1) to a path (31) other than a path (33) located at the lowermost stage of an evaporator (13), and, when the outside temperature is a predetermined temperature or lower, and a predetermined time has passed or the difference between the shell temperature of the compressor (1) and the low pressure saturation temperature is a predetermined value or less after the completion of the reverse defrosting operation, branches the discharged refrigerant from the compressor (1) between the compressor (1) and a four-way valve (2), and leads the discharged refrigerant to the path (33) located at the lowermost stage of the evaporator (13) so as to be in parallel with a water heat exchanger (3) until a predetermined time passes.