| 摘要 |
PROBLEM TO BE SOLVED: To prevent the diffusion of smoke, or the like, and secure the safety of an evacuation route, or the like, when a fire breaks out, or the like, even in a building with an internal shaft space such as an atrium, or the like. SOLUTION: In this system, a detection means 8 for detecting the generation of smoke or heat, an exhausting means 9 for exhausting the smoke or heat outside the building 2 and a pressurized air supply means for pressurizing and supplying external air are provided in respective stories 3a-3f facing an internal shaft space 1. In this case, when such a detection means 8 in a certain story 3b detects the generation of smoke or heat, an exhausting means 9 in the certain story 3b is started to operate, and pressurized air supply means in all of the stories 3a and 3c-3f except for the certain story 3b are started to operate. Thus, a differential pressure is generated between the certain story 3b and the internal shaft space 1.
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