| 摘要 |
A method and a fire-fighting extinguisher nozzle (10) 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 (10). The openings communicate with a liquid source through at least one small diameter drilled hole (14,16) 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 (10). The nozzle (10) is also being associated with trigger mechanism (18), initiating the mist creating effect by allowing an extinguishing liquid to be sprayed out the openings of the nozzle (10) when heat or fumes are detected. At least some of the drilled holes (14,16) are configured in such way that a deflecting surface is provided inside the drilled holed(16) 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 (14,16). A method for fabricating such nozzle (10) is also provided, where at least one axially aligned small diameter hole(16) is drilled, starting from an end of the wall of the nozzle (10), intended to be jointed with a supply line for liquid, whereupon the material at the opposite end of the nozzle (10) is lathed away, so that just a part of the tip of the drilled hole (16) is exposed, leaving an internally arranged sloped surface inside the drilled hole(16), sloping down towards the exposed aperture at the end of the drilled small diameter holes (16). |
