| 摘要 |
<p>PURPOSE:To control the temperature of hot water discharged with excellent accuracy by providing a heating flow path, in which a forced convection is formed on the passage of water and a natural convection on the non-passage of water, and a heating flow path for controlling the temperature of hot water. CONSTITUTION:A cylindrical heating element 14, which is provided with first and second heating resistors 17, 18 and to upper and lower sections thereof heating sections 20, 21 are formed, is erected in a hot-water storage chamber 27, and a heat exchanger 22 in which the first and second heating flow paths 23, 24 are each made correspond to the heating sections 21, 20 is set up to the outer circumference of the heating element 14. A downward cold-water supply nozzle 25 is fitted at the upper end of the first heating flow path 23 and an induction port 26 is formed to a side wall, an outflow port 28 is formed to the side wall of a lower end, the second heating flow path 24 is positioned upward, and an inflow port 31 is formed to the side wall of a lower section and communicated with the upper section of the hot-water storage chamber 27 by a pipe 30. On the non-passage of water, only the heating section 21 is heat-generated, and water is convected naturally by the first heating flow path 23. On the passage of water from the nozzle 25, water is convected forcedly by the passage of water, the heating section 20 is also heat-generated in response to the temperature of hot water discharged, and hot water is flowed through a hot-water outflow path 5 from a flow path in the heating element 14.</p> |
