Combustion control device

摘要

A combustion control device includes a combustion fan motor, a control unit, a silicon diode group, a silicon diode, and a combustion-fan-disconnection detecting unit. The control unit is configured to control a combustion state of the combustion fan motor. The silicon diode group includes at least two silicon diodes coupled in series to the combustion fan motor. The silicon diode is coupled in parallel to the silicon diode group with a reversed polarity. The combustion-fan-disconnection detecting unit includes a photocoupler and a resistor. The photocoupler and the resistor are coupled in parallel to the silicon diode group and the silicon diode with the same polarity as a polarity of the silicon diode group side.

主权项

1. A combustion control device, comprising:
a power supply for supplying AC power to said combustion control device: a combustion fan motor connected to said power supply so as to operate by AC power; a control unit configured to control a combustion state of the combustion fan motor; a silicon diode group that includes at least two first silicon diodes coupled in series to the combustion fan motor and said power supply, said first silicon diodes having a first polarity permitting a current flow from said power supply to said combustion fan motor for operation of said combustion fan motor; at least one second silicon diode coupled in parallel with the silicon diode group between said power supply and said combustion fan motor, said silicon diode having a reversed second polarity that is reversed relative to said first polarity of said first silicon diodes; and a combustion-fan-disconnection detecting unit that is coupled to said control unit and includes a photocoupler and a resistor, the photocoupler and the resistor being coupled in parallel to the silicon diode group and the second silicon diode with a same polarity as said first polarity of the silicon diode group side.