Automatic fire extinguishing device and fire detection tube used in this automatic fire extinguishing device

摘要

It is an object of the present invention to provide an automatic fire extinguishing apparatus that can detect a fire at a temperature of 120 ° C. or less and can be installed in a maintenance-free state for as long as possible. The present invention relates to a pressure-resistant container containing a fire extinguishing agent and a pressure agent therein, a container valve attached to the opening of the pressure-resistant container, and a fire detection tube (14) connected to the container valve. The fire detection tube (14) is formed by laminating a gas barrier layer (18) on a tubular base resin layer (22), and the base resin layer (22) is made of a thermoplastic resin, The layer (18) is made of an ethylene-vinyl alcohol copolymer resin (EVOH resin).