System and method for smoke free elevator shaft

Details System and method for smoke free elevator shaft System and method for smoke free elevator shaft

1997-02-03

1998-02-17

Joyce, Harold

Ventilation

Elevator

454251, F24F 1100

Patent

active

057186278

ABSTRACT:
A system and method for maintaining elevator use during a fire includes a blower and a damper at opposite ends of an elevator shaft to create a full volume current of fresh air that engulfs a conventional elevator car traveling between floors. The unidirectional airflow provides a curtain of air that "washes" any smoke away from the exterior of the elevator car. When the car stops at a floor, the damper closes to force the fresh airflow onto that floor. Fresh air is chosen from one of several fresh air supplies by sensing the quality of the air at the supplies.

REFERENCES:
patent: 5215499 (1993-06-01), Eberhardt
patent: 5462485 (1995-10-01), Kindead

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