| 摘要 |
PURPOSE:To prevent the burning of an empty bath-boiler and to ensure safe operation of the titled apparatus, by omitting a bath burner by feeding part of warm water in the apparatus heated by a burner to a heat exchanger disposed in a heated-water circulating passage and heating water in a bath boiler at the portion of the heat exchanger. CONSTITUTION:Water in a hot-water supplying apparatus 11 is heated to heat water by a boiler 12, and part of the hot water is carried to a heat exchanger 14 via one heated-water circulating passage 15 and then returned to the apparatus 11 via the other heated-water circulating passage 15'. Since the water in a bath boiler 13 is heated by the hot water passed through the inside of the heat exchanger 14, water in a bathtub 18 is heated and boiled by causing natural convection together with water heated in the bath boiler 13. |
