| 摘要 |
<p>PURPOSE:To realize a minimization of formation of a mixed layer within a hot water storing tank, an effective use of quantity of charged heat and maximization of quantity of hot water which can be used with respect to the capacity of the hot water storing tank. CONSTITUTION:Based on an output of a clock 9 which counts time after a start of operation, an output of a heating source 4 is controlled so that, at the start of the operation when low temperature water exist up to an upper part of the hot water storing tank 1, the temperature of hot water supplied out of an hot water outlet 3 is high, and on the other hand, when hot water has been accumulated and a mixed layer 1b of hot water and cool water has come downward, the temperature of the hot water is lowered down. Thus, by increasing a difference of density between the hot water from the hot water outlet and the water in the tank at the begining of operation, attenuation effect of flow velocity from the hot water outlet is increase while formation of the mixed layer is prevented as munch as possible. As a result, a ratio of hot water of a useless temperature becomes small, and therefore, the quantity of heated heat can be utilized effectively.</p> |
