METHOD FOR REDUCING PRESSURE IN AIR LOCK ROOM AND AIR LOCK ROOM FOR USE IN THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for reducing a pressure in an air lock room and the air lock room for use in the same, which can suppress an incidence of a caisson disease.;SOLUTION: An oxygen mask 20 is provided in the air lock room 10 in which a worker 6 is adapted to a pressure difference between a high-pressure workplace 5 and an atmospheric- pressure environment; the worker 6 is made to put on the oxygen mask 20, so as to undergo oxygen inhalations, when the pressure is reduced in the room 10; ventilation is provided by exhausting air in the room 10 and supplying air into the room 10; and the amount of oxygen supplied to the oxygen mask 20 and/or the amount of the ventilation in the room 10 are/is adjusted so that an oxygen partial pressure in the room 10, which is generated by oxygen leaked from the oxygen mask 20, can be made equal to/lower than a partial pressure which brings danger of fire. Preferably, oxygen concentrations in the room 10 are continuously measured, and the amount of the supplied oxygen and/or the amount of the ventilation are/is adjusted so that the measured oxygen concentrations can be made equal to/lower than concentrations which brings the danger of the fire. More preferably, when an air pressure in the high-pressure workplace 5 is high, the worker 6 is prohibited from putting on the oxygen mask 20 or the supply of the oxygen to the oxygen mask 20 is stopped, until the pressure in the room 10 is reduced to a magnitude which eliminates danger of oxygen intoxication.;COPYRIGHT: (C)2003,JPO