| 摘要 |
The present invention is a Regulator-Oxygen (ROX) Unit for regulating oxygen flow in a multiple user emergency oxygen distribution system in passenger aircraft. Upon activation, the ROX unit initially allows unregulated flow of oxygen to surge into the distribution system to thereby purge the ambient air out of the system. After a sufficient pressure is achieved in the distribution system, the ROX unit regulates the flow mechanically with a diaphragm engaging a regulator valve. The pressure of the oxygen under the diaphragm causes the regulator valve to reduce the flow of the oxygen through the ROX unit. The ROX unit accounts for changes in altitude by communicating the inlet pressure to the chamber above the diaphragm. A bleed exit allows the oxygen to escape to the ambient air. One or more aneroid valves in fluid communication with the bleed exit adjust the amount of oxygen allowed to exit through the bleed exit such that less oxygen is allowed to escape for an increase in altitude. Thus the pressure above the diaphragm increases to thereby allow more oxygen to flow through the regulator valve.
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