Patent ID: 8500879
Filing Date: 2013-08-06
Classification: A61M,B01D

Abstract:
1. A PSA, PVSA, or VSA oxygen concentrator comprising at least one pair of oxygen concentration columns for concentrating oxygen to a predetermined range by switching high pressure side and low pressure side of the oxygen concentration columns to adsorb nitrogen from taken air; a pressure controlling means for adjusting pressure of the oxygen concentration columns; and an oxygen tank for storing generated concentrated oxygen; the oxygen concentrator comprising: a first mechanical flow control means individually placed on a plurality of first channels which are extended from each of the at least one pair of oxygen concentration columns, and connected to the oxygen tank, allowing flow from the oxygen concentration columns to the oxygen tank and prohibiting flow from the oxygen tank to the oxygen concentration columns; at least one first check valve with spring placed on a second channel extended from the oxygen tank to the at least one pair of oxygen concentration columns distinguished from the first channels, prohibiting flow from the oxygen concentration columns to the oxygen tank and allowing excess oxygen which cannot be contained in the oxygen tank to escape from the high pressure side of the oxygen concentration columns to the low pressure side of the oxygen concentration columns; and second check valves individually placed on a plurality of third channels branched from the second channel extended from the oxygen tank and connected to each of the at least one pair of oxygen concentration columns, allowing flow from the oxygen tank to the oxygen concentration columns and prohibiting flow from the oxygen concentration columns to the oxygen tank.