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US 5,984,663 AGranted
Gas fueled heating appliance
AssigneeBowin Technology Pty. Ltd.
InventorJohn V. Joyce
Life of this patent
Estimating the term…
Abstract
A gas heater is provided with a combustion status sensor that provides heater performance data to a controller that controls the heater according to the sensor data and stored calibration parameters optimized for the particular heater.
Claims24
A heating appliance fueled by a combustible gas comprising:
- a gas burner, said gas burner providing a combustion site for substantially all of the combustion;
- a jet for delivering the gas to said burner;
- a valve for controlling flow of the gas to said jet;
- an electrical ignition system for selectively igniting gas at the burner;
- a combustion chamber about said burner, said chamber having an inlet for combustion air and an outlet for burned gases;
- a combustion status sensor located at said combustion site for providing a signal indicative of a combustion status to be sensed;
- and
- a first controller that controls said appliance in accordance with said combustion status signal and a plurality of stored calibration parameters, said controller thereby being responsive to at least one of CO.sub.2 /O.sub.2 concentration, flashback, combustible gas type, or gas pressure.
5 more elements
A heating appliance fueled by a combustible gas comprising:
- a gas burner, said gas burner providing a combustion site for substantially all of the combustion;
- a jet for delivering the gas to said burner;
- a valve for controlling flow of the gas to said jet;
- an electrical ignition system for selectively igniting gas at the burner;
- a combustion chamber about said burner, said chamber having an inlet for combustion air and an outlet for burned gases;
- a thermocouple located at said combustion site for providing a first signal indicative of a combustion status to be sensed;
- an intake for cooling air;
- an outlet for a combination of said cooling air and said burned gases;
- a temperature sensor located near said outlet for said combined cooling air and burned gases, said temperature sensor providing a second signal indicative of the combustion status to be sensed;
- and
- a first controller that controls said appliance in accordance with said combustion status signals, wherein said combustion status is at least one of CO.sub.2 /O.sub.2 concentration, flashback, combustible gas type, or gas pressure.
8 more elements
A heating appliance fueled by a combustible gas comprising:
- a gas burner, said gas burner providing a combustion site for substantially all of the combustion;
- a jet for delivering the gas to said burner;
- a valve for controlling flow of the gas to said jet;
- an electrical ignition system for selectively igniting gas at the burner;
- a combustion chamber about said burner, said chamber having an inlet for combustion air and an outlet for burned gases;
- a combustion gas temperature sensor located at said combustion site for providing a first signal indicative of a combustion status to be sensed;
- a combustion gas conductivity sensor located at said combustion site for providing a second signal indicative of a combustion status to be sensed;
- and
- a first controller that for an initial period controls said appliance in accordance with said second signal and for a later period controls said appliance in accordance with said first signal, said controller thereby being responsive to flashback during either period.
6 more elements
A heating appliance fueled by a combustible gas comprising:
- a gas burner, said gas burner providing a combustion site for substantially all of the combustion;
- a jet for delivering the gas to said burner;
- a valve for controlling flow of the gas to said jet;
- an electrical ignition system for selectively igniting gas at the burner;
- a combustion chamber about said burner, said chamber having an inlet for combustion air and an outlet for burned gases;
- a fan for providing combustion air;
- a combustion sensor located at said combustion site;
- and
- a first controller that provides an alert sequence if said sensor detects an ongoing combustion signal before an ignition attempt or if combustion continues after gas shutoff, said alert sequence including activating said fan for the duration of said alert sequence.
6 more elements
Dependencies are inferred from the claim text.