Fire Extinguisher

The present invention relates to a extinguisher and method for extinguishing fire. There is a need in a number of industries for mass ejection devices. That is to say, devices which will send out a spray of liquid and liquid vapour at a fixed or variable rate and over a desired distance. Preferably there is a need for a spray of liquid and liquid vapour to occur at a fast rate and over a great distance. In such systems the term "throw ratio" is often referred to as a characteristic of a spray. The throw ratio of material is defined as the distance travelled divided by the length of a chamber from which the spray is ejected. This invention uses vapour explosion technology to dramatically increase the throw ratio, and hence to give a much greater capability for an existing fire extinguisher nozzle.