Patent ID: 8070864
Filing Date: 2011-12-06
Classification: A61M,B01D,C01B

Abstract:
1. A pressure swing adsorption-type oxygen concentrator including 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, and a control device to control an air supply volume from the air supply device based on a predetermined flow rate in the flow rate setting device, the air supply volume from the air supply device at a certain value when the predetermined flow rate is equal to or below a given flow rate, and a release volume of compressed air through the leak valve as determined based on the predetermined flow rate.