| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress a noise caused by a rapid, reduced pressure and expansion of a fire-extinguishing gas.SOLUTION: A gas spraying apparatus includes: a spraying head (13) having a nozzle part (12); a sound absorbing material (125) which is composed of a porous metal and is a part in which a fire-extinguishing gas discharged from the nozzle part flows; a ring member (122) which makes contact with the sound absorbing material to fix the sound absorbing material; and a connecting member (129) for connecting the spraying head and the ring member. A nozzle hole (16) is provided on the nozzle part, and the sound absorbing material has one end surface (125b) from which the fire-extinguishing gas is discharged and the other end surface (125a) facing an opening of the nozzle hole. The fire-extinguishing gas discharged from the nozzle hole is made to directly flow into the inside of the porous metal from the other end surface, and the fire-extinguishing gas is discharged to the atmosphere from one end surface of the sound absorbing material and is also discharged to the atmosphere from peripheral surfaces of the sound absorbing material.</p> |
