| 摘要 |
<p>The present invention relates to a technique of emitting fire extinguishing sand on an upper surface of a fire extinguishing object such as an assembled battery housed in a rack in a multistage manner by means of gas pressure to extinguish fire. In the present invention, a tip end portion of a flattened nozzle main body 12 is provided with a deflecting plate 16, and by spraying the fire extinguishing sand obliquely downward and letting the fire extinguishing sand bound, the fire extinguishing sand is dispersed on the entire upper surface uniformly.</p> |
