METHOD FOR DETECTION OF FIRE IN ROOM AND ADAPTIVE FIRE LOCALIZATION Russian patent published in 2022 - IPC A62C37/08 

FIELD: fire-fighting equipment.

SUBSTANCE: invention relates to fire-fighting equipment, namely to fire prevention, fire containment, and fire extinguishing; it can be used for the detection of fires in residential, warehouse, office and specialized premises with subsequent fire localization and extinguishing. A method for the detection of fire in a room and adaptive fire localization consists in initial setting of zones of sprinkler trigger, depending on potentially combustible material prevailing in them. At the same time, for each zone, irrigation densities of combustible materials generated by sprinklers are set to suppress their thermal decomposition, as well as thresholds for triggering gas fire detectors, depending on a type of a room, on minimum concentrations of oxygen, carbon dioxide, carbon monoxide and hydrogen formed during the ignition of potentially combustible materials, as well as thresholds for triggering combined fire detectors by temperature, depending on a type of a room. Fire detectors constantly measure the air temperature and concentrations of oxygen, carbon dioxide, carbon monoxide, hydrogen in it. When one fire detector is triggered, after 60 s, all fire detectors are re-interrogated, while received values are compared with values of flue gas concentrations set for each combustible material. If current values coincide with set values, a corresponding valve on a pipeline with water is opened to trigger corresponding sprinklers located above the zone with burning material, while regulating the water pressure, providing the set irrigation density of at least 11.2 l/ m² for extinguishing wood; at least 4.1 l/ m² for extinguishing wood-fiber slabs; at least 15 l/m² for extinguishing chipboard; at least 1.25 l/m² for extinguishing linoleum; at least 2.2 l/m² for extinguishing linoleum based on fabric; at least 0.5 l/m² for extinguishing polyvinyl chloride panels, while fire detectors continue to measure concentrations of gases in the air. If there is an increase in the concentration of oxygen and a decrease in the concentration of carbon dioxide compared to set thresholds for triggering fire detectors, the water supply through sprinklers is stopped.

EFFECT: increase in the efficiency of extinguishing a center of ignition due to the reduction in water consumption, as well as elimination of flooding with water of areas of a controlled room that are not covered by fire.

1 cl, 4 dwg, 1 tbl