COMBUSTOR

PROBLEM TO BE SOLVED: To provide a combustor that in a case of preparing two kinds of safety devices, even when one safety device operates, can determine which safety device operates.SOLUTION: A combustor is configured to: in a case where output from a high limit switch monitoring circuit 14 is in a power supply cutoff state, determine that a first high limit switch 91 operates (YES in S1, S2); in a case where the output is in an electrification state, when there is a flame detection signal from a flame rod 22 even once during current combustion control (YES in S3), when output from a power supply monitoring circuit 16 is in the power supply cutoff state (YES in S4), and when the flame detection signal is not detected at the current time (YES in S5), determine that a second high limit switch 92 operates (S6); and when flame is detected (NO in S5), determine that a power supply circuit breaks down (S7).SELECTED DRAWING: Figure 2 【課題】２種類の安全装置を設ける場合に、安全装置がたとえ作動したとしても、いずれの安全装置が作動したかを判別し得る燃焼装置を提供する。【解決手段】ハイリミットスイッチ監視回路１４からの出力が電源遮断状態であれば、第１のハイリミットスイッチ９１が作動と判定する（Ｓ１でＹＥＳ，Ｓ２）。通電状態であれば、現在の燃焼制御中にフレームロッド２２からの炎検知信号が一度でもあり（Ｓ３でＹＥＳ）、電源供給監視回路１６からの出力が電源遮断状態であり（Ｓ４でＹＥＳ）、現在は炎検知信号が非検知であれば（Ｓ５でＹＥＳ）、第２のハイリミットスイッチ９２が作動と判定し（Ｓ６）、炎検知であれば（Ｓ５でＮＯ）、電源供給回路の故障と判定する（Ｓ７）。【選択図】図２