| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage type hot water supply device reducing a heat radiation loss to achieve good thermal efficiency. SOLUTION: The storage type hot water supply device includes a boiling-up target temperature decision means 40 which decides a boiling-up target temperature based on a hot water supply heat quantity per a day in the boiling-up operation in a late-night time zone and decides a previously set predetermined high temperature as a boiling-up target temperature in the boiling-up operation in time zones except the late-night time zone. When a stored hot water temperature sensor 32 disposed in the vicinity of an indirect heat exchanger 13 detects a first predetermined temperature or lower, a switching means 29 is switched to an intermediate return pipe 28 side so that hot water heated to a predetermined high temperature by a heating means 21 is returned to a hot water storage tank 1 intermediate part. COPYRIGHT: (C)2011,JPO&INPIT |
