FIRE-FIGHTING METHOD AND APPARATUS Russian patent published in 2005 - IPC

FIELD: fire-fighting equipment, particularly for volumetric fire extinguishing in closed space.

SUBSTANCE: method involves separate feeding cooled gaseous aerosol with progressively increasing temperature to upper space of room to be protected at the command of control system; additionally supplying sprays of fire-extinguishing powder mixed with products of solid fuel combustion across the whole room volume or locally in lower room part at maximum speed, wherein quantity of supplied aerosol, initial time, direction and necessity of fire-extinguishing powder supply is determined from fire spread speed and nature. Fire-extinguishing substance is supplied in accordance with the following program. Under false operation of control system or in the case of small fire apparatus is given a command to supply gaseous aerosol. If fire covers the full room volume apparatus is given a command in 5 - 10 min to supply gaseous aerosol and, when needed, if fire is not extinguished, apparatus is given a command to additionally supply fire-extinguishing powder. If fire is accompanied by explosion and in the case of room air-tightness failure apparatus is given a command to simultaneous supply gaseous aerosol and fire-extinguishing powder. Fire-extinguishing apparatus comprises at least one aerosol generator AG 1, at least one powder extinguisher PE 2 with solid-fuel displacing gas generator GG 3, control system for operating fire-extinguishing composition supply connected to aerosol generator and powder extinguisher. Control system has sensors 4 and control-and-triggering means 5. Aerosol generator and gas generator GG 3 are provided with cooling inert nozzles. Control system is programmed to actuate aerosol generator and powder extinguisher in dependence of fire nature.

EFFECT: increased efficiency, reduced time of space filling with fire-extinguishing composition and, simultaneously, increased economy and safety to people, possibility to extinguish fires at early stage in large rooms with dense equipment arrangement in the case of people present and in rooms with large quantities of pressurized combustible materials which may explode with creation of high-power fire sites distributed across the whole room volume; increased consumption of fire-extinguishing composition and reduced volumetric concentration thereof, increased reliability of fire-extinguishing system in temperature range from -60° to +60°.

10 cl, 2 dwg