Ask the HVAC major, what is the use of the air supply room? In case of fire, do you need to continue working?

The one upstairs is engaged in water supply and drainage, isn't it, misleading children.

Fire fighting system is divided into positive pressure air supply system and smoke exhaust air supply system.

The positive pressure air supply system is located in the smoke-proof stairwell and the front room of the fire elevator to ensure that people have enough wind pressure to push the smoke out when they run to the evacuation passage.

The smoke exhaust and air supply system is located in the fire prevention and smoke prevention area, and the air supply volume is about 50%-60% of the smoke exhaust. Air supply is to provide fresh air to the fire and smoke prevention area when the smoke exhaust fan is turned on, so as to ensure that no vacuum is generated and the smoke can be discharged faster. If there is natural ventilation in the smoke-proof partition, there is no need to set up a supplementary fan, but if it is not satisfied, 50%-60% fresh air must be added.

If the fan in the fresh air machine room is used as a supplementary fan in case of fire, it must be turned on.

In addition, whether it is a new fan or an auxiliary fan, a 70-degree fire damper should be set when the air duct passes through the machine room.

The new fan is equipped with a normally open fire damper, which will fuse and close when it catches fire, thus cutting off the smoke.

The normally closed fire damper set in the air supply fan should be opened first when it catches fire, and the fan should be interlocked when the smoke reaches 70 degrees.