Safety equipment for gas burner
First Claim
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1. A safety equipment for a gas burner comprising:
- a combustion sensor having porous electrodes disposed on both sides of a sintered body of ion conductive solid electrolyte, one of said electrodes being exposed to an exhaust gas atmosphere of the burner while the other electrode being exposed to a gas atmosphere other than said exhaust gas atmosphere, said sensor generating an e.m.f. depending on a ratio of oxygen concentrations of said gas atmospheres, a resistance of said sensor changing with a temperature;
an electromagnetic safety valve connected in a fuel supply path to said burner; and
an electrical control circuit responsive to a change in the e.m.f. of said combustion sensor due to incomplete combustion of said burner and responsive to a change in the resistance of said sensor due to extinction of said burner, for controlling said electromagnetic safety valve.
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Abstract
A safety equipment for a gas burner is disclosed wherein a combustion sensor comprising an oxygen concentration cell having porous electrodes disposed on both sides of a sintered body of ion conductive solid electrolyte, is provided, so that incomplete combustion and extinction of the burner are detected by a change in e.m.f. of the sensor and a change in resistance of the sensor. The detected signal is used to block the feed of fuel to the burner in order to prevent CO gas poisoning and explosion.
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Citations
7 Claims
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1. A safety equipment for a gas burner comprising:
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a combustion sensor having porous electrodes disposed on both sides of a sintered body of ion conductive solid electrolyte, one of said electrodes being exposed to an exhaust gas atmosphere of the burner while the other electrode being exposed to a gas atmosphere other than said exhaust gas atmosphere, said sensor generating an e.m.f. depending on a ratio of oxygen concentrations of said gas atmospheres, a resistance of said sensor changing with a temperature; an electromagnetic safety valve connected in a fuel supply path to said burner; and an electrical control circuit responsive to a change in the e.m.f. of said combustion sensor due to incomplete combustion of said burner and responsive to a change in the resistance of said sensor due to extinction of said burner, for controlling said electromagnetic safety valve. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification