| 摘要 |
PROBLEM TO BE SOLVED: To easily implement a silencer 17b in an existing gas fire-extinguishing apparatus by configuring the silencer 17b of the gas fire-extinguishing apparatus into a simple and compact structure.SOLUTION: A high-pressure fire-extinguishing gas from a fire-extinguishing gas supply source 15 via a conduit pipe 14 is ejected from nozzle holes 16 of a nozzle part 12 of a jet head 13, towards a space within a fire-extinguishing object zone. The jet head 13 is detachably and threadedly disposed in a recess formed inside a fitting part 37 of the silencer 17b. The fitting part 37 includes, at a downstream side of the nozzle holes 16, an acoustic material 40 consisting of a porous material having fine voids. This configuration facilitates a selective use of the nozzle part 12 having nozzle holes 16 of various types of different bores. |
