Method and apparatus for controlling the purity of oxygen produced by an oxygen concentrator
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United States of America Patent
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Jan 11, 2011
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app pub date -
Feb 9, 2005
filing date -
Feb 9, 2005
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Abstract
An oxygen concentrator comprises a plurality of adsorbent columns, each having an inlet, an outlet and abed of adsorbent material. The oxygen concentrator also includes a vacuum pump for removing separated nitrogen rich gas from the column inlets, a control valve for controlling flow of fluids in and out of the columns, and a breakthrough sensor for signaling the position of a mass transfer zone (MTZ), the breakthrough sensor controlling operation of the control valve as a function of the breakthrough sensor signal. An electric control module (ECM) receives the signal from the breakthrough sensor, and adjusts the control valve based on the signal.
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