An automatic flameout protection device for household gas stoves

Abstract

The invention discloses an automatic flame-out protection device used for a household gas stove. The automatic flame-out protection device consists of an ignition controller, a gas plug valve, a manual-push electromagnetic valve and a gas burner, wherein the ignition controller consists of a driving circuit, a high-voltage pulse output circuit, a flame ion detection circuit, an A / D (Analog / Digital) conversion circuit and a CPU (Central Processing Unit), after being electrified, under the control of the CPU, the driving circuit supplies power for a maintaining coil winding of the manual-push electromagnetic valve, the high-voltage pulse output circuit outputs high-voltage pulse current to an ignition needle, a flame sensing needle inputs flame ion current into a flame ion detection circuit, meanwhile the diameter phi of an enameled wire of the maintaining coil winding of the manual-push electromagnetic valve is required to be 0.04-0.10 mm, and the number of turns is required to be 500-2500, so as to realize accurate and reliable automatic flame-out protection. The automatic flame-out protection device is simple in structure, lower in production cost, long in service life of a battery, and applicable to all household gas stoves.

Description

technical field [0001] The invention relates to the technical field of household gas stoves, in particular to an automatic flameout protection device for a household gas stove. Background technique [0002] At present, household gas stoves have basically been ignited by high-voltage pulse spark ignition. At the same time, national standards also stipulate that: household gas stoves must have a flameout protection function; the power supply of household gas stoves is batteries. Therefore, the ignition control system that realizes the above functions must respond quickly, function stably, save electricity, have low cost and work reliably. [0003] In the prior art, the automatic flameout protection of the domestic gas stove is to detect the flame of the burner through the detection device. The valve will be de-energized and off the valve, thereby shutting off the gas channel and achieving the purpose of automatic flameout protection. [0004] For the above flame detection, t...

AI Technical Summary

Problems solved by technology

[0006] It can be seen from the above that the existing gas stove flameout protection device, the thermocouple type has a slow response, even if it becomes a double-winding coil scheme on the basis of increased cost and complicated process technology, there is still a problem of post-delay time; the self-priming valve type is in order to save Cost, when the self-priming valve is used as the main valve of the gas passage of two burners, if one burner goes out unexpectedly, both burners will automatically shut down

In addition, the above two solutions have the problems of high cost and short battery life. At the same time, the reliability of the self-priming valve is worse than that of the hand-push solenoid valve.

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