After the smoke detector detects the smoke, it transmits the alarm signal to the automatic fire alarm controller, and then starts the field linkage equipment; When the temperature reaches a certain level, the nozzle will burst and realize automatic water fire extinguishing. When the water pressure in the pipeline drops to a certain extent, the spray pump will automatically start the water supply to extinguish the fire.

Fire protection is basically divided into three systems, electricity, water and smoke prevention system. The electrical system is usually an alarm and control system. The water system is generally a fire extinguishing system, and the fire extinguishing system is divided into various fire extinguishing methods such as water spraying, fire hydrant, gas and foam extinguishing. Then there is tobacco control. Automatic sprinkler system is the most widely used fixed fire extinguishing system in the world, especially suitable for high-rise buildings and other buildings with high fire risk. It has incomparable advantages over other systems: safety, reliability, economy and practicality, and high fire control rate. It mainly includes wet, dry, dry-wet alternating, pre-action and rain automatic sprinkler systems. Composition and basic working principle of wet automatic sprinkler system. It is mainly composed of closed nozzle, pipeline system, wet alarm valve, alarm device and water supply facilities.