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The fire fan mainly refers to when there is a fire in the room, there will be a lot of smoke, and its role is to discharge the smoke from the room. The fire fan has a smoke exhaust valve, which is usually closed and automatically opened when a fire breaks out. It is connected to the alarm host. The condition for opening is that the automatic alarm system has a fire alarm, the fire alarm host is in automatic state, the fire exhaust valve automatically opens, and the linkage fire exhaust fan starts.
The fire fan mainly refers to when there is a fire in the room, there will be a lot of smoke, and its role is to discharge the smoke from the room. The fire fan has a smoke exhaust valve, which is usually closed and automatically opened when a fire breaks out. It is connected to the alarm host. The condition for opening is that the automatic alarm system has a fire alarm, the fire alarm host is in automatic state, the fire exhaust valve automatically opens, and the linkage fire exhaust fan starts.

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