| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately control a burner burning based on a gas flow rate to be detected by a differential pressure type gas flow sensor. SOLUTION: A gas temperature detecting means 31 for detecting a temperature of a fuel gas to be detected at its flow rate by a gas flow sensor 28 is provided. A gas flow corrector 36 temperature-corrects a gas flow Rt of the detected gas temperature Trt to a gas flow Rs of a predetermined reference temperature Trs based on the detected gas flow Rt of the sensor 28 and the detected gas temperature Trt of the means 31. When a temperature of the fuel gas is the temperature Trs, relationship data between the gas flow and a combustion heat quantity output from the sensor 28 is previously given to a data storage unit 35. Then, a target gas flow corresponding to a required combustion heat quantity is obtained based on the relation data. A combustion controller 37 controls a proportional valve 11 so that the temperature corrected gas flow becomes the target gas flow, and controls the burner burning.</p> |
