Fire-fighting extinguisher nozzle; a method for fabricating such nozzle, and a method for producing a spray of fine-droplet mist

摘要

Method and a fire-fighting extinguisher nozzle for providing a spray of fine droplet mist of liquid into a space, room or a cavity, comprises a number of openings in the exterior surface of the nozzle. Openings communicate with a liquid source through at least one small diameter drilled hole in a nozzle material, enabling liquid in the form of a mist to be directed at least partly in lateral direction and/or at least partly in a sector axially out from the nozzle. The nozzle is also being associated with trigger mechanism, initiating the mist creating effect by allowing an extinguishing liquid to be sprayed out the openings of the nozzle when heat or fumes are detected. Some of the drilled holes are configured in such way that a deflecting surface is provided inside the drilled holed in the nozzle material in the vicinity of the outlet, causing formation of the mist spray of crushed liquid consisting of fine, minute droplets just inside the drilled holes.

主权项

1. A fire-fighting extinguisher nozzle for providing a spray of fine droplet mist of liquid into a space, room or a cavity, comprising:
a housing; a number of holes integral to the housing of the nozzle; and a number of openings in the exterior surface of the housing of the nozzle, each of the number of openings being at an end of a respective hole of the number of holes, the openings configured to communicate with a liquid source through the respective hole of the number of holes formed in a nozzle material, enabling liquid in the form of a spray to be directed at least partly in lateral direction and/or at least partly in a sector axially out from the nozzle, the nozzle being associated with a trigger mechanism, to initiate a spraying effect by allowing an extinguishing liquid to be sprayed out of the openings of the nozzle when heat or fumes are detected, wherein at least some of the number of holes are configured in such way that a mist of minute droplets is created by the respective opening of the number of openings, and are provided with a deflecting surface arranged inside the number of holes in the nozzle material, configured to cause formation of the mist spray of crushed liquid immediately inside the number of holes, the openings of the at least some of the number of holes having a crescent cross sectional shape.