| 摘要 |
PURPOSE:To improve the response of the temperature of the delivered how water relative to an abrupt change in the temperature setting by a constitution in which an advanced control is made by fully opening a gas regulating valve at the time of the abrupt change in the set temperature, and the flow rate adjustment control is made after the temperature of the delivered hot water has stabilized, while the combination of such processes are repeated. CONSTITUTION:A controller 12, upon detecting an abrupt change in the temperature setting 20, fully opens a gas flow rate regulating valve 17, and computes an influx flow rate required to coincide the temperature of the delivered hot water temperature with the set temperature based on the temperature setting, water temperature and maximum calorific value at the time of fully opening the gas regulating valve 17 so as to control the opening of a water flow rate control valve 9. After the temperature of the delivered hot water temperature is detected to be stabilized, the water flow adjustment is computed based on the temperature of the delivered hot water temperature, influx water temperature, temperature setting, control output, maximum control output and water flow adjustment data so as to make a correction of opening of the water flow rate control valve 9. By repeating such processes, the temperature of the delivered hot water is adjusted to the set temperature. By this constitution, the response is quickly made against an abrupt change in the set temperature. |
