| 摘要 |
PURPOSE:To obtain predetermined hot water immediately upon starting supply of hot water, by a construction wherein a terminal hot water supply unit comprising a hot water storing tank provided with a heater, a branch circuit connected to an inlet circuit and an outlet circuit, and a controlling valve for controlling a flow dividing ratio according to feed water temperature is connected to the downstream side of a hot water supplying circuit of a main hot water supply heat source machine. CONSTITUTION:When the supply of hot water is started at time t0 supposing that the temperature (a) of tapped hot water is set to 85 deg.C, feed water tempera ture (c) is set to 5 deg.C and a mixing temperature is set to 40 deg.C, the flow dividing ratio is 0.44, and when the mixed water flow rate is 5l/min, the water flow rate through the inlet circuit 13 is 2.2l/min. When this flow dividing ratio is adopted, a mixing temperature (b) of 40 deg.C is obtained, and the feed water temper ature (c) starts to rise at time t1. At time t2, the feed water temperature (c) reaches 40 deg.C, and the flow dividing ratio is 0. In this case, when the temperature of hot water supplied from the machine 1 is set to about 45 deg.C, the feed water temperature (c) is about 45 deg.C, so that hot water with a mixing temperature of about 40-45 deg.C can be instantaneously obtained. |
