| 摘要 |
PROBLEM TO BE SOLVED: To provide a water spraying head which sprays a necessary and enough amount and distribution of water within a fireproof region. SOLUTION: A closely spraying head provided downward on a head body and with a short-distance water-sprinkling range A and a plurality of faraway spraying heads provided higher than the closely spraying head with a long- distance water-sprinkling range B sprinkling at least partly in a long-distance region and containing a fan-shaped head are provided to reasonably cover a specified fireproof region by combining the short-distance water-sprinkling range A and the plurality of the long-distance water-sprinkling ranges B. It may be possible that a faraway spraying head for sprinkling to the corner part of the fireproof region is made to be a single opening nozzle with a rod-like water drainage or the faraway spraying head is fitted on the head body with a ball joint or a dust-proof cover covering by combining the closely spraying head and at least a part of the faraway spraying heads is provided.
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