| 摘要 |
PURPOSE:To enable hot water feed exceeding the hot water feed capacity of a heat exchanger for hot water feed and filter dirt and fur in hot water at the time of additional heating by providing a hot-water storage tank for storing hot water heated by the heat-exchanging effect of the heat exchanger for hot water feed and providing a filter on the way of a connecting pipeline between a pump and a heat exchanger for additional heating. CONSTITUTION:Water supplied from the external side to the upper part of a hot-water storage tank 3 is once stored in the said tank, and when the water is then supplied from the lower part of the hot-water storage tank 3 to a heat exchanger 2 for hot water feed, heat-exchanging is effected to heat the water, and the resultant hot water is returned to the hot-water storage tank 3. By this method, the hot-water storage tank is gradually filled with the hot water from its upper part. The hot water is supplied from the bottom part of the hot-water storage tank 3 to an ambient air open type tank 4. In this case, hot water feed exceeding the hot water feed capacity of the heat exchanger for hot water feed becomes possible because the quantity of hot water which is supplied to the tank 4 can be made larger than that of hot water heat-exchanged by the heat exchanger 2 for hot water feed. Furthermore, by providing a filter 6 on the way of a connecting pipeline between a circulating pump 5 and a heat exchanger 7 for additional heating, dirt and fur in the hot water are filtered during the circulation of the hot water at the time of additional heating. |
