초록 ▼

An aircraft on-board oxygen generation system having a controller 14 for cycling sieve beds of amolecular sieve-type gas separation system 10, provides product gas having a partial pressure of oxygen that more closely approaches the ideal value at any cabin altitude within the operating range of the

An aircraft on-board oxygen generation system having a controller 14 for cycling sieve beds of amolecular sieve-type gas separation system 10, provides product gas having a partial pressure of oxygen that more closely approaches the ideal value at any cabin altitude within the operating range of the aircraft. The controller stores a look-up table of desired product gas oxygen content at various altitude levels within the operating range and displays desired product gas oxygen content at altitudes sensed by an altitude sensor 17 for comparison with delivered product gas oxygen content sensed by oxygen content sensor 19. The controller provides for a range of selectable cycle time and adjusts the cycle time in the sense required to null the difference between displayed and sensed oxygen content of the product gas.

대표청구항 ▼

An on-board oxygen generating system for an aircraft, comprising a molecular sieve-type gas separation system arranged to deliver oxygen-enriched air as product gas to an outlet by adsorbing nitrogen from air fed to the system, the system including at least two sieve beds and control means for cycli

An on-board oxygen generating system for an aircraft, comprising a molecular sieve-type gas separation system arranged to deliver oxygen-enriched air as product gas to an outlet by adsorbing nitrogen from air fed to the system, the system including at least two sieve beds and control means for cyclically subjecting each said sieve bed to a charge/adsorption on-stream phase followed by a purge/desorption regeneration phase, the control means providing for a range of selectable cycle times and including means sensitive to the oxygen content of the product gas, means responsive to aircraft altitude to display a desired oxygen content of said product gas at an altitude within an operating range, and comparator means for comparing the displayed desired oxygen content with the sensed oxygen content of the product gas and adapted to adjust the cycle time in the sense required to null the difference between said displayed and sensed oxygen contents of the product gas.