Explosion proof gas-fired water heater
AssigneeGiant Factories Inc.
InventorClaude Lesage
Life of this patent
Estimating the term…
Abstract
An explosion proof gas-tired water heater is comprised of a housing having a water reservoir provided with a sealed combustion chamber thereunder. A flue pipe is disposed above the combustion chamber and extends through the reservoir. A gas burner and pilot are provided in the combustion chamber. At least one air supply channel is provided to supply fresh air to the combustion chamber. The air supply channel has an intake disposed a predetermined height above the floor to prevent combustible vapors from entering the combustion chamber. Vapor detectors and/or pressure sensors may be provided as added features to detect the presence of combustible vapors as well as the production of harmful carbon monoxide in the combustion chamber and to actuate the gas supply cut-off valve.
Claims9
An explosion proof gas-fired water heater comprising a housing having a water reservoir and a sealed combustion chamber thereunder, a flue pipe above said combustion chamber and extending through said reservoir, a gas burner and pilot in said combustion chamber, a gas supply line having a gas supply shut-off valve secured to said burner and pilot, a sealed combustible air supply channel to supply fresh air to said combustion chamber and having an air supply intake disposed elevated from a floor surface of said water heater a distance of at least 40 inches whereby combustible vapors will not propagate to the air supply intake to enter said combustion chamber and reach said gas burner and pilot through said air supply channel and one or more vapor detectors associated with said channel to detect the presence of combustible vapors, said vapor detectors being connected to switching means to shut-off said gas burner and pilot before said combustible vapors reach said gas burner and pilot through said air supply channel.
Dependencies are inferred from the claim text.