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(11) | EP 0 969 251 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Ignition apparatus for boiler |
| (57) An ignition apparatus for a boiler capable of preventing a wrong operation of a control
circuit is provided. In the ignition apparatus for a boiler, a sparking plug performs
an igniting operation of the gas supplied into the burner. Spark plug has an insulator
mounted to a back wall of the combustion chamber and two leads extending from both
ends of the insulator. A high voltage transformer generates a high voltage necessary
to ignite the burner and applies the high voltage to the spark plug. Two connecting
terminals are formed at one end of high voltage transformer. Two leads are inserted
into two connecting terminals. A driver is mounted to the control circuit in such
a way that the driver is connected to the spark plug and drives the spark plug. A
wire connects the high voltage transformer and the driver. A power supply is mounted
to a control circuit in such a way that the power supply is electrically connected
to the driver and supplies power to the driver in order to control an operation of
the driver. According to the ignition apparatus, discharge noise of a high voltage
generated in a high voltage cable according to the conventional ignition apparatus
does not affect the control circuit to thereby prevent a wrong operation of the control
circuit. |