Digital modulation for a gas-fired heater
First Claim
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1. A gas-fired heater comprising:
- a plurality of burners, at least one valve, each said valve corresponding to one of said burners and operating between a closed position and an open position;
a fuel supply in fluidic communication with at least one of said burners when said at least one valve is in said open position;
a modulator receiving a temperature signal, said modulator computing as a function of said temperature signal and emitting at least one control signal, said modulator operating said at least one valve between said open position and said closed position as a function of said at least one control signal, and said modulator controlling said at least one valve to one of activate and deactivate said burners for incrementally modulating a heat input to the gas-fired heater.
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Abstract
A gas-fired heater includes a plurality of burners and one or more valves corresponding to one of the burners and operating between a closed position and an open position. A fuel supply is in fluidic communication with at least one of the burners when the one or more valves are in the open position. A modulator receives a temperature signal and computes, as a function of the temperature signal, and emits at least one control signal. The modulator then operates the one or more valves between the open position and the closed position as a function of the at least one control signal and controls the one or more valves to either activate or deactivate the burners for incrementally modulating a heat input to the gas-fired heater.
47 Citations
19 Claims
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1. A gas-fired heater comprising:
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a plurality of burners, at least one valve, each said valve corresponding to one of said burners and operating between a closed position and an open position;
a fuel supply in fluidic communication with at least one of said burners when said at least one valve is in said open position;
a modulator receiving a temperature signal, said modulator computing as a function of said temperature signal and emitting at least one control signal, said modulator operating said at least one valve between said open position and said closed position as a function of said at least one control signal, and said modulator controlling said at least one valve to one of activate and deactivate said burners for incrementally modulating a heat input to the gas-fired heater. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 17, 18, 19)
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14. A method for operating a gas-fired heater, the method comprising:
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a plurality of burners, at least one valve, each said valve corresponding to one of said burners and operating between a closed position and an open position;
supplying fuel to at least one of a plurality of burners when at least one valve is in an open position;
operating each said valve between said open position and a closed position as a function of at least one control signal received at said at least one valve;
emitting a temperature signal to a modulator;
computing at least one control signal as a function of said temperature signal and emitting said at least one control signal from said modulator to said at least one valve;
operating said at least one valve between said open position and said closed position as a function of said at least one control signal; and
incrementally modulate a heat input to the gas-fired heater by controlling said at least one valve to one of activate and deactivate said burners.
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Specification
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Current AssigneeArthur D. Little, Inc.
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Original AssigneeGas Research Institute (GTI Energy)
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InventorsBrussovansky, Sergei, Casey, Steven, Bowman, John A.
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Application NumberUS09/839,597Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current431/60CPC Class CodesF23N 1/002 using electronic means F23N...F23N 2225/12 room temperatureF23N 2235/14 electromagnetically operatedF23N 2235/16 variable flow or proportion...F23N 2237/02 two or more burnersF23N 2241/02 Space-heatingF23N 5/022 using electronic means F23N...
