HEAT PUMP TYPE HOT WATER SPPLY DEVICE

摘要

PROBLEM TO BE SOLVED: To prevent the turbulence of a temperature stratification formed in a hot water storage tank upon defrosting operation. SOLUTION: A hot water circulation amount adjusting means 13 adjusts the circulation quantity of hot water in the hot water storage tank 1 which is circulated by a hot water circulating means 4. An operation control means H performs an ordinary operation for switching a refrigerant circuit T to a heating state and the hot water circulating means 4 to a hot water storage state and the defrosting operation for switching the refrigerant circuit T to a defrosting state and the hot water circulating means 4 to a heat supply state. The hot water circulation quantity adjusting means 13 is operated so that the circulation quantity of hot water in the hot water storage tank 1 circulated by the hot water circulating means 4 is smaller in the defrosting operation than that in the ordinary operation.