Apparatus and method for safe operation of kerosene heaters
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United States of America Patent
Stats
-
Nov 24, 1992
Grant Date -
N/A
app pub date -
Jul 16, 1991
filing date -
Oct 26, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process and apparatus for monitoring and ensuring safe operation of unvented kerosene heaters in indoor spaces detects the hazard of incomplete combustion and the concomitant reduced O.sub.2 and increased CO.sub.2 levels in the indoor air. CO.sub.2 level in the indoor air is monitored quickly and accurately, - regardless of the burner's flame height. This is achieved by sensing O.sub.2 level in the burner exhaust which is used as a measure for monitoring the CO.sub.2 level in the indoor air and as a control signal. During burner operation outside a predetermined flame height range, the O.sub.2 detection is used both for restoring a normal heating condition and for monitoring operation at minimum flame height and to generate a warning signal and a delayed automatic shut-down of the burner.
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