| 摘要 |
PURPOSE:To form the tap-controlled gas hot-water supplier, in which the transitional temperature fluctuation is controlled and the feed hot-water temperature is stabilized, by a method wherein a water amount aignal operator, a differentiator and a differential corrector are provided and the amount of combustion is kept at the maximum or minimum value temporarily when the absolute value of output of the differential corrector is higher than a given value. CONSTITUTION:The frequency signal of a water amount detector 3 is introduced into an water amount operator 8 to obtain a water amount signal proportional to the amount of water. When the amount of water is changed suddenly, the differentiator 9 generates an output (b). Then, the differential value corrector 10 generates an output signal (c) at a time (n) and the magnitude thereof exceeds a threshold value. As a result, the variation of the amount of combustion (d) is proportional to the water amount signal (a) until the time (n) is reached. However, the amount of combustion is switched to the miminum amount of combustion by a signal switching unit 11 at the time (n) and the minimum amount of combustion is kept during the time (tau) of a timer 12. The amount of combustion, smaller than the operated value (e), is kept during the period of time (tau) and the transitional fluctuation of the delivered hot-water temperature is controlled smaller than the same (g) in the case of non-correction. The time (tau) is controlled in accordance with the output (e) of the heat amount operator 7 so that the larger the ratio of output (e) and the minimum amount of combustion, the shorter the time (tau) will be whereby the amount of correction may be kept at optimum. |
