2. Exhibitions, shops, restaurants and hotels with a building area of more than1500m2 or a total building area of more than 3000m2, as well as ward buildings, outpatient buildings and operating departments with the same building scale in hospitals;
3. Centralized air-conditioning system of air duct (pipeline) and office building with a total construction area of over 3000m2. ;
4. Libraries with more than 500,000 books;
5, large and medium-sized kindergartens, elderly care facilities;
6. Underground or semi-underground shops with a total construction area of over 500m2;
7, set in the underground or semi-underground or above four floors (except swimming places), set in the first floor, second floor, third floor and any floor with a building area of more than 300㎡.
Extended data
In case of fire, the temperature rises, the closed nozzle explodes, the accelerator exhausts, and the water flow indicator sends a feedback signal to the alarm controller. At the same time, due to the pressure drop behind the valve, the dry alarm valve group opens, the hydraulic alarm bell alarms, the pressure switch outputs the pump signal to start the fire pump group, and the fire is continuously sprayed.
In case of fire, the automatic fire alarm system will automatically open the rain alarm valve, and the water distribution pipeline will start to exhaust and fill with water, so that the system will be changed into a wet system before the closed sprinkler acts, and water will be sprayed immediately after the closed sprinkler is opened.
In case of fire, the rain alarm valve and water supply pump are automatically controlled by the automatic fire alarm system or transmission pipeline to supply water to the system pipe network, and the sprinkler is turned on to spray water.
In case of fire, the automatic fire alarm system will start the rainwater alarm valve group and water supply pump to supply water to the system pipe network and automatic sprinkler system.
Baidu encyclopedia-automatic sprinkler system