Fire extinguisher

Patent metadata

Field	Value
Publication number	US-2021101036-A1
Application number	US-201916971178-A
Country	US
Kind code	A1
Filing date	Feb 18, 2019
Priority date	Feb 20, 2018
Publication date	Apr 8, 2021
Grant date	—

Abstract

A fire extinguisher includes a body defining a storage chamber containing an extinguishing agent, a gas generator configured to pressurize the extinguishing agent in order to dispense it outside the body through an exit opening. The exit opening is equipped with a misting nozzle, and the extinguishing agent has a solidification temperature less than −10° C., the saturating vapor concentration of the extinguishing agent taken at −10° C. and at 1 bar being less than the extinguishing concentration of the extinguishing agent determined according to the ISO 14520 standard for a heptane fire at 1 bar.

First claim

1 . A method for extinguishing a fire in an environment with a temperature less than or equal to −55° C., comprising at least one step of dispensing an extinguishing agent by a fire extinguisher comprising:
a body defining a storage chamber containing the extinguishing agent,
a gas generator configured to pressurize the extinguishing agent in order to dispense it outside the body through an exit opening,
the exit opening being equipped with a misting nozzle, and the extinguishing agent having a solidification temperature less than −10° C., the saturating vapor concentration of the extinguishing agent taken at −10° C. and 1 bar being less than the extinguishing concentration of the extinguishing agent determined according to the ISO 14520 standard for a heptane fire at 1 bar,
and wherein the misting nozzle generates liquid droplets of extinguishing agent with a size less than or equal to 50 μm at −10° C.

2 .- 4 . (canceled)

5 . The method according to claim 1 , wherein the gas generator is configured to impose a maximum pressure on the extinguishing agent greater than or equal to 3 bar.

6 . The method according to claim 5 , wherein the gas generator is configured to impose a maximum pressure on the extinguishing agent greater than or equal to 7 bar.

7 . The method according to claim 1 , wherein the extinguishing agent is FK-5-1-12.

8 . (canceled)

9 . The method according to claim 1 , wherein the gas generator comprises a pyrotechnic gas generator.

Assignees

• Arianegroup Sas

Inventors

• Gonthier Gilles
• Marlin Frédéric

Classifications

• A62C99/0018

  using gases or vapours that do not support combustion, e.g. steam, carbon dioxide · CPC title

• A62C3/004

  for freezing warehouses and storages · CPC title

• A62C3/08

  in aircraft {(A62C3/0207 takes precedence)} · CPC title

• A62C13/003 Primary

  Extinguishers with spraying and projection of extinguishing agents by pressurised gas · CPC title

• A62C35/023 Primary

  the extinguishing material being expelled by compressed gas, taken from storage tanks, or by generating a pressure gas (for foam generation A62C5/02) · CPC title