The oxygen source of the emergency equipment of this device is a high-pressure oxygen cylinder with a normal pressure of 65,438+800 psi. The oxygen source of the cabin oxygen system is the passenger oxygen generator located above each group of seats, one for each group of seats, which can supply oxygen continuously 10 ~ 12 minutes. Once triggered, it cannot be closed. The generator and the cup-shaped mask of the oxygen storage bag together form a passenger service part. To be on the safe side, there are more masks than airplanes.
When the plane flies above 4268 meters, it is necessary to pressurize the cockpit. If the pressure in the cockpit is lost, it will cause hypoxia, and passengers will be dizzy or even unconscious, even life-threatening. In the case of air leakage in the cockpit at different altitudes, the hypoxia time that people can bear is 6 100 m 10 min, 7,800 m 2 min, 9 140 m 30 sec,10,700 m 20 sec and12,200 sec respectively. Oxygen mask is an emergency life-saving equipment to provide oxygen for passengers. When the cockpit of an aircraft is threatened, the oxygen mask will automatically fall from the top of the cabin. Passengers should carry oxygen masks with them until the plane drops below the safe breathing altitude. Every flight has enough oxygen masks, that is, every passenger is equipped with one, and each row of seats is equipped with an extra pair of spare masks in case of accidents.