Patent ID: 8944173
Filing Date: 2015-02-03
Classification: A61M,A62C,F23D,F23K,F23R

Abstract:
1. Apparatus for extinguishing a fire, comprising: an ejection chamber to hold a portion of a selected extinguishing liquid; an inlet valve arranged to selectively open to transfer extinguishing liquid into said ejection chamber and then to selectively close to seal the portion of the selected liquid in the ejection chamber; an exit valve arranged to selectively open to eject extinguishing liquid from the chamber through the exit valve in a vapor explosion process, then through a neck region when a parameter associated with said ejection chamber satisfies a predetermined condition such that opening of the exit valve causes liquid in the ejection chamber to boil rapidly within the ejection chamber, the neck region being narrower in cross-sectional diameter than the ejection chamber; at least one pressure or temperature sensor that generates one or more signals for determining pressure in the ejection chamber; and an electronic controller for electronically controlling the inlet valve and exit valve to selectively open and close based on the pressure in the ejection chamber determined from the one or more signals received from the at least one pressure or temperature sensor; wherein extinguishing liquid and/or extinguishing liquid vapor are ejected from the ejection chamber via the exit valve, and wherein said exit valve is arranged to open when a temperature of the liquid in the ejection chamber is above a boiling point temperature associated with said liquid at a downstream position from the exit valve, and wherein the parameter is the temperature of the liquid in the ejection chamber and the predetermined condition is the temperature of the liquid being above said boiling point temperature.