Gas separation: apparatus – Solid sorbent apparatus – With control means responsive to sensed condition
Patent
1996-05-10
2000-05-16
Chiesa, Richard L.
Gas separation: apparatus
Solid sorbent apparatus
With control means responsive to sensed condition
95 15, 95 21, 96114, 96130, 13762543, B01D 5304
Patent
active
060631694
ABSTRACT:
A control device for molecular sieve on-board oxygen generating systems measures both temperature and pressure of the inlet air of an oxygen generating system. An electronic control unit applies pressure limits to a pressure measurement signal and combines it with a temperature measurement signal to produce a composite analog signal responsive to both temperature and pressure inlet air conditions. This analog signal is linearly converted to a frequency signal, whereupon the frequency signal is divided by a constant in order to produce a drive signal for control of the absorb/vent bed cycle valves. Composition control is achieved by venting product mixture as required. Inlet air pressures down to 5 PSIG (pounds per square inch gauge) produce correct system operation, and the quantity of conditioned air required is automatically limited so that system efficiency is higher than prior art systems.
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Cramer Robert L.
Muhs, deceased Donald P.
Chiesa Richard L.
Litton Systems Inc.
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