| 摘要 |
<p>PURPOSE:To improve the efficiency of the storage amount for a hotwater tank by a method wherein even the stagnated water in the lower part inside of a hot- water tank is enabled to be heated due to the natural convection by the operation of a heat-excanger separately located from hot-water tank. CONSTITUTION:A hot-water tank 1 and a heat-exchanger 2 for a heater of said tank 1 are provided seperately each other, and said two devices are connected with a feed pipe 3 and a return pipe 4. In such a structure, the heat-exchanger 2 is located at the position lower than the bottom suface of the hot-water tank 1, the feed pipe 3 is provided to connect with the each lower part of said two devices 1, 2, also the return pipe 4 is provided to connect with the each upper part of said two devices 1, 2. Further, an electric heater 5 is provided inside of the heat-exchanger 2, thereby, the water supplied from a water supply pipe 6 to the hot-water tank 1 forces down the remaining water inside of said tank 1 at the designated water level. Then, when the electric heater 5 is set ON, the water in said tank 1 is naturally circulated by convection in following order, the feeding pipe 3 the heat-exchanger 2 the return pipe 4, thereby, the high temperature hot-water is sequentially stored from the upper part to the lower part in said tank 1.</p> |
