(57) A spark igniter for a gas-fired appliance, such as a boiler, comprises a pair of
electrodes (11, 12) and a circuit (2), under the control of a microprocessor (3),
that can generate, during each ignition process, successive bursts of sparks between
the electrodes (11, 12), the duration, e.g. about 200 ms, of each burst of sparks
being significantly less than the time period, e.g. about 1 second, that elapses before
the next burst of sparks is generated. Generation of ignition sparks in such a way
enables the igniter to comply with EU electromagnetic compatibility requirements (Fig
1).
|
|
