JPS56117020A - Control circuit for combustor - Google Patents

Abstract

PURPOSE: To prevent an extreme wasting of fuel and to protect the combustor in a safe condition in the use by designing the control circuit such that when the combustor is ignited through an ignition timer, the combustor stops its combustion after a certain period of time elapses after the ignition so that the combustion does not continue for a long time in the absence of the user.

CONSTITUTION: When the thumb 20 of the ignition timer is turned in the direction of an arrow P to a desired valve within the range B, two pairs of contacts 2-3 and 5-6 of an ignition timer contact 3 become conductive to initiate a power supply to an ignition timer motor 2. After a set period of time elapses and when the thumb 20 enters a range A, two pairs of contacts 2-3 and 5-4 become conductive, thereby starting the power supply to the circuits of the ignition timer motor 2, sheeth heater 5 and the like so as to initiate the preheating of a vaporization section. In this instance, if a combustion switch 7 is closed, at the completion of the preheating is carried out an ignition. After a certain period of time within the range A elapses, the cock 20 of the ignition timer comes to an "OFF" position automatically. Then, two pairs of contacts 2-1 and 5-4 become conductive to interrupt the power supply to all of the circuits. As a consequence of this, the combustor stops its combustion.

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