| 摘要 |
PROBLEM TO BE SOLVED: To provide a combustion detector capable of accurately detecting a combustion state even if dispersion peculiar to a circuit exists in a power supply voltage detecting circuit in detecting the combustion state by a flame current. SOLUTION: The combustion detector comprises a flame rod 7 provided to be inserted in a combustion flame; a power circuit 1 applying alternating voltage to the flame rod; a flame current detecting circuit 3 detecting the flame current flowing to the flame rod; the power supply voltage detecting circuit 4 detecting the alternating voltage of the power circuit; and an arithmetic means 5 obtaining the output of the power supply voltage detecting circuit and flame current detecting circuit to compute a first correction quantity to the fluctuation of power supply voltage and to add the first correction quantity to the flame current. A second correction quantity of the flame current corresponding to a circuit constant peculiar to the power supply voltage detecting circuit is preset to the arithmetic means. COPYRIGHT: (C)2007,JPO&INPIT |
