| 摘要 |
PURPOSE:To reduce an under-shoot and an over-shoot of a hot water temperature to be fed out and to get hot water of which transmissive response characteristic is superior by a method wherein in case that an amount of fuel is varied in an increasing direction or decreasing direction a far more fuel amount or less amount of fuel is fed after the variation is occurred for a certain period of time. CONSTITUTION:A water supplying pipe 4 is provided with an amount of water sensor 6 and a fed water temperature sensor 7, each of the senses signals is inputted to a control circuit 10 and at the same time a set value of a fed-out hot water temperature setting unit 9 is also inputted to calculate the required amount of fuel and then a fuel control valve 5 is controlled with a calculated fuel amount signal 16. The control circuit 18 may accept a variation of fuel amount signal 16 and in the event that its variation is high, a signal is flowed to the control circuit 18 to control the fuel control valve 5 only within a certain time by the transmissive response time correction signal 19 more than or less than the calculated amount of fuel. The fed-out hot water temperature signal 14 sensed by a fed-out hot water sensor 8 arrange at the heat exchanger 2 of the hot water feeding pipe 17 is inputted to the control circuit 11 together with the set value of the fed-out hot water temperature setting unit 9 and the fuel control valve 5 is controlled by an output from the circuit 11. |
