N2/CO2 fire extinguishing system propellant gas mixture

摘要

An automatic fire extinguishing system includes a canister having a central axis, an outlet port disposed on the canister, a dip tube disposed in the canister about the central axis and in partial fluid communication with the canister and coupled to the outlet port, a propellant gas mixture of CO2 and N2 disposed within the canister and a gaseous fire suppression agent disposed in the canister.

主权项

1. An automatic fire extinguishing system, comprising:
a canister having a central axis; an outlet port disposed on the canister; a propellant gas mixture of CO2 and N2 disposed within the canister when the automatic fire extinguishing system is inactive; a gaseous fire suppression agent disposed in the canister; and a dip tube disposed in the canister about the central axis, the dip tube including a volume of dry powdered extinguishing agent stored therein adjacent the outlet port regardless of the orientation of the system, wherein the dip tube includes an inlet port disposed at an axial end of the dip tube having an opening covered by a semi-permeable membrane such that the propellant gases within the canister permeate the semi-permeable membrane to pressurize the extinguishing agent, and such that the semi-permeable membrane prevents egress of the volume of dry powdered extinguishing agent from the dip tube via the inlet port; a central rod disposed in the canister and the dip tube, the central rod being disposed about the central axis; a broad head cutter disposed on an end of the central rod; a burst disc disposed in the outlet port and adjacent the broad head cutter, the burst disc being configured to maintain isolation between the canister and the dip tube when the system is in a non-activated state; and wherein an actuation means is configured to move the central rod along the central axis.