Dual fuel heater
OwnerDavid Denginventor
Life of this patent
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Abstract
In certain embodiments, a dual fuel heater has a pressure regulating device for selectively coupling with a first source or a second source operating at different pressures. The dual fuel heater can also include first and second fuel lines, a fluid flow controller, a combustion chamber and first and second oxygen depletion sensor nozzles. The fluid flow controller is configured to selectively permit flow of fuel to either the first fuel line or to the second fuel line. In some embodiments, the first fuel line is connected to the first oxygen depletion sensor nozzle and the second fuel line is connected to the second oxygen depletion nozzle.
Claims11
A dual fuel heater for coupling with one of two fuel sources operating at different pressures, the heater comprising:
- a first fuel line;
- a second fuel line;
- a first pressure regulator valve configured to control flow of a first fuel through the first pressure regulator valve within a predetermined first pressure range corresponding to natural gas;
- a second pressure regulator valve configured to control flow of a second fuel through the second pressure regulator valve within a predetermined second pressure range different from the first pressure range and corresponding to liquid propane;
- and
- a fluid flow controller in communication with the first pressure regulator valve and the second pressure regulator valve, the controller configured to selectively permit flow of said first fuel to either the first fuel line or flow of said second fuel to the second fuel line;
- and
- a combustion chamber;
- wherein the first fuel line is in communication with a first oxygen depletion sensor nozzle and the second fuel line is in communication with a second oxygen depletion sensor nozzle.
Dependencies are inferred from the claim text.