| 摘要 |
PCT No. PCT/JP80/00008 Sec. 371 Date Sep. 23, 1980 Sec. 102(e) Date Sep. 23, 1980 PCT Filed Jan. 24, 1980 PCT Pub. No. WO80/01604 PCT Pub. Date Aug. 7, 1980.A combustion control apparatus which controls combustion in a combustor which is a heat source of a hot-water boiler or a hot-air heater includes a memory circuit which generates an alarm signal and also a signal for stopping the operation of the apparatus and which maintains the apparatus in the shutdown state, when an abnormal condition such as abnormal heating or ignition failure is sensed. This memory circuit is protected from malfunction due to noise generated from external output units in the combustion control apparatus by a circuit which detects an abnormality signal with timing other than the timing of generation of noise from the external output units, and the output of this circuit is applied as an input to the memory circuit. The detection circuit is arranged to detect the abnormality signal while receiving clock pulses from a timer as its input, and the phase of its detection timing is selected to be out of phase with the noise generation. The detection timing is determined so that it differs from the timing of on-off control for each of the external output units and also from the generating timing of discharge pulses in the ignition unit.
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