| 摘要 |
The invention relates to a spray head for producing a liquid mist and preferably for extinguishing fire, the spray head comprising an inlet for receiving an extinguishing liquid, at least one nozzle that forms an opening in the exterior of the spray head for discharging a mist of the extinguishing liquid and a passage connecting the inlet and the at least one nozzle such that the extinguishing liquid can be conveyed from the inlet to the opening, wherein: the at least one nozzle comprises a first boring and a second boring whose longitudinal axes are substantially aligned, the first boring having a relatively small width and the second boring having a relatively large width, such that the nozzle is capab le of expanding a turbulent flow of extinguishing liquid as it flows from the firs t boring to the second boring, and the length of the second boring being sufficient f or the expanded flow of extinguishing liquid to impact a wall of the second boring as it flows from the first boring to the opening, the nozzle thereby being capable of discharging a mist of extinguishing liquid from the opening.
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