| 摘要 |
PURPOSE:To automatically supply hot-water within a short time period, reduce the size and cost of a circulating pump and solve troubles caused by vibration of the circulation pump by a method wherein hot-water is transferred through both supply and return pipes to and from a bath by using the tap water pressure during transfer time. CONSTITUTION:When water is led to a bath boiler with hot-water supply apparatus 1 through a water supply pipe 3, the water is divided into two streams; one is led to a flow sensor 4 to a hot-water supply heat exchanger 2 and the other one to a bypass valve 26 and joined to the hot-water heated by the heat exchanger 2. Then, the mixed hot-water flows to a flow proportioning valve 5. After passing through the proportioning valve 5, the hot-water is divided into two streams at a branch point 11; one stream flows along a hot-water supply pipe B8 which is connected to an automatic hot-water supply solenoid valve 7 and the other stream flows along a hot-water supply pipe A10 which is connected to a hot-water faucet 9 furnished in a kitchen, etc. The automatic hot-water supply solenoid valve 7 is located on the downstream side of the hot-water supply pipe B8. The hot-water supply pipe B8 leads to a bath circuit junction point 36 through a first check valve 27, a vacuum breaker 28 and a second check valve 29 and is divided into two branch pipes and one branch pipe is connected to a two-way valve 31. After a bath hot-water feed pipe 19 is checked for clog-free state, the two-way valve 31 is opened, and the hot-water is transferred through both bath hot-water return pipe 22 and bath hot-water feed pipe 19 for a specified time period. At this time, water is automatically filled in a circulation pump 17 mounted on the bath hot-water return pipe 22 so that priming work for the pump is automatically carried out. |
