Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1990-10-23
1992-06-30
Swann, III, Glen R.
Communications: electrical
Condition responsive indicating system
Specific condition
250554, 431 13, G08B 2100
Patent
active
051267217
ABSTRACT:
A method and apparatus for determining and indicating the flame quality, or efficiency of the air-fuel ratio, in a fixed firing rate heating unit, such as an oil burning furnace, is provided. When the flame brightness falls outside a preset range, the flame quality, or excess air, has changed to the point that the unit should be serviced. The flame quality indicator output is in the form of lights mounted on the front of the unit. A green light indicates that the flame is about in the same condition as when the burner was last serviced. A red light indicates a flame which is either too rich or too lean, and that servicing of the burner is required. At the end of each firing cycle, the flame quality indicator goes into a hold mode which is in effect during the period that the burner remains off. A yellow or amber light indicates that the burner is in the hold mode. In this mode, the flame quality lights indicate the flame condition immediately before the burner turned off. Thus the unit can be viewed when it is off, and the flame condition at the end of the previous firing cycle can be observed.
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Butcher et al., "Advanced Control Strategies", Proceedings of the 1989 Oil Heat Technology Conference and Workshop; Jun. 1989.
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Butcher et al., "Field Tests on Advanced Control Strategies", Oil Heat Tech. Conf. and Workshop; Mar. 1990.
Butcher, "Performance Control Strategies for Oil-Fired Residential Heating Systems", Project Report; Jul. 1990.
Butcher Thomas A.
Cerniglia Philip
Dvorscak Mark P.
Fisher Robert J.
Moser William R.
Swann III Glen R.
The United States of America as represented by the United States
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