Oxygen concentrator
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United States of America Patent
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Dec 6, 2011
Grant Date -
Oct 15, 2009
app pub date -
Sep 21, 2007
filing date -
Sep 22, 2006
priority date (Note) -
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Abstract
An apparatus to provide an oxygen concentrator that is a pressure swing adsorption-type oxygen concentrator equipped with; at least one adsorption bed filled with an adsorbent capable of selectively adsorbing nitrogen relative to oxygen, an air supply device to supply compressed air to the adsorption bed, a flow channel switching device to repeat at a predetermined timing an adsorption step to supply air from the air supply device to the adsorption bed to isolate concentrated oxygen and a desorption step to depressurize the adsorption bed to regenerate the adsorbent therein, and a flow rate setting device to set a volume of concentrated oxygen supplied to a user; comprising an exhaust pipe channel equipped with a leak valve in a flow channel between the air supply device and the adsorption bed to release a part of compressed air that is to be supplied to the adsorption bed into atmosphere.
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