| 摘要 |
PROBLEM TO BE SOLVED: To store a target hot water storage amount of hot water in a state in which oil hardly runs out, even if hot water is supplied during the operation of a hot water circulation means in a heat pump (hereinafter called HP) hot water storage operation state. SOLUTION: A hot water supply heat source device comprises a hot water storage tank 1; a hot water circulation means E to circulate hot water in an HP hot water storage operation state that hot water at the bottom of the hot water storage tank is heated by an HP type heater 33 and supplied to the upper part of the hot water storage tank; a hot water supply means G to supply hot water in the upper part of the hot water storage tank; and a control means G to control the operation of a hot water circulating means. The control means executes HP hot water storage operation control, where operation is executed in an HP hot water storage operation state, when a hot water storage amount reaches a target hot water storage amount or lower, and executes HP-auxiliary heating combined hot water storage operation control, where the hot water circulating means is operated in an HP- auxiliary heating combined hot water storage operation state, and that after the hot water heated by the HP heater is heated by an auxiliary heater 35, when a hot water storage amount is decreased to a value lower than a set hot water storage amount for auxiliary heating, which is lower than a target hot water storage amount during the execution of an HP hot water storage operation state, the hot water is supplied to the upper part of the hot water storage tank. |
