SYSTEM FOR EXHAUSTING FIRE SMOKE BY REVERSING AXIAL FLOW FAN OF AN AIR CONDITIONING UNIT

摘要

A fire smoke exhaust system comprises a fire detector to inform a fire alarm station of a fire causing it to give alarm to each floor through a station-floor interconnecting system, to cut off an air conditioning unit in a building, and to turn on a generator, a power switching control and an anti-phase switching control, said anti-phase switching control being triggered by said fire alarm station to reverse an axial flow fan 8 in an air outlet from an air supply conduit 91 of said air conditioning system causing it to suck in smoke for exhaust out of said building through an exhaust conduit 10, the conduits 91, 10 including check valves 11, 12 which open in the same direction. IMAGE