| 摘要 |
<p>PURPOSE:To permit to effect comfortable additional heating without providing any uncomfortable feeling even when discharging hot-water hits directly the skin of man by a method wherein the additional heating is started in a combustion range near the maximum combustion and the combustion range is lowered to a specified range to reduce the discharging hot-water temperature when the temperature of the hot-water approaches a set temperature. CONSTITUTION:When a water flow switch 6 is put ON within a predetermined time, a signal is inputted into a gas valve control circuit 14 from an operating circuit 13 to open a gas valve 15 fully and the additional heating of maximum combustion (100%) is started. The additional heating is conducted while effecting forced circulation and when hot-water temperature has arrived at a temperature lower than the set temperature in a heat-up temperature adjusting switch 11 by 2 deg.C, the temperature detector 7 detects it and outputs the signal of 50% combustion from the operating circuit 13 into the gas valve control circuit 14, then, the gas valve 15 is choked to the opening degree of 50% combustion based on the signal and 50% combustion is continued until the hot-water temperature arrives at 42 deg.C, which is set in the heat-up temperature adjusting switch 11. The discharging hot-water temperature from a discharging port is lowered and whereby mild hot-water hits the skin of man as same as in a hot spring when the discharging hot-water hits the skin.</p> |
