Subway station public area fire-fighting smoke exhaust system and smoke exhaust method thereof

The invention discloses a subway station public area fire-fighting smoke exhaust system which comprises a station hall layer and a platform layer, a first public area smoke-proof partition and a second public area smoke-proof partition are arranged in the station hall layer, and a third public area smoke-proof partition is arranged on the platform layer. The interlocking control of the subway station combined air conditioner, the smoke exhaust fan, the return and exhaust fan and the smoke exhaust fan is realized through a BAS system and an intelligent low-voltage system; a smoke exhaust method using the subway station public area fire-fighting smoke exhaust system comprises a fire working condition, a normal working condition and system shutdown, the fire working condition comprises a normal smoke exhaust mode and a strong smoke exhaust mode, and the normal working condition comprises an air conditioner small fresh air mode, an air conditioner full fresh air mode, a ventilation mode and a winter mode. 本发明公开了一