| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a hot water storage type hot water supplying heat source device capable of suitably executing water quality keeping operation for keeping water quality of hot water in a hot water storage tank. <P>SOLUTION: This device is provided with a heating auxiliary heating means 19w for heating a heat medium circulating in a heat medium circulating passage 21 having a heat radiating terminal 6, and a heating heat exchanger 11 for executing heat exchange between hot water supplied from a heating means H to the hot water storage tank 5 and the heat medium circulating in the heat medium circulating passage 21. A control means C executes operation for operating the heating means H as water quality keeping operation so that the state wherein a temperature of a whole of the hot water in the hot water storage tank 5 is equal to or higher than a set water quality keeping temperature is maintained for a set water quality keeping time period, and executes auxiliary temperature raising operation for operating the heating auxiliary heating means 19w in the state wherein the heat medium is circulated in the heat medium circulating passage 21 at least before the temperature of the whole of the hot water in the hot water storage tank 5 is equal to or higher than the set water quality keeping temperature during execution of water quality keeping operation. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
