Patent ID: 11935390
Assignee: CARRIER CORPORATION
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 4:
5. A method of determining a source of smoke in a monitored environment, the method comprising:
determining a concentration of smoke in a sample of air from the monitored environment;
determining a concentration of a predetermined gas in the sample of air, wherein the predetermined gas is one of carbon monoxide, carbon dioxide, nitrogen dioxide or sulphur dioxide;
identifying a source of the smoke based on the concentration of smoke and the concentration of the predetermined gas;
wherein the source of the smoke is identified to be a non-fire source when the concentration of the predetermined gas in the sample of air does not exceed a first threshold; and
wherein the source of the smoke is identified to be a fire source when the concentration of the predetermined gas in the sample of air exceeds the first threshold;
comparing the concentration of smoke and the concentration of the predetermined gas to predetermined concentrations associated with a plurality of known fire sources; and
identifying one of the plurality of known fire sources as the source of the smoke based on the comparison.