| 摘要 |
<p>A single stage secondary high purity oxygen concentrator and method of concentrating oxygen are described. The concentrator has at least a first (130) and a second (140) inlet valve, a first (105) and a second (110) molecular sieve bed, and a first (135) and a second (145) outlet valve. According to a first embodiment of the present invention, the concentrator further comprises a relief valve (155). During a charge cycle of the first molecular sieve bed (105), the first inlet valve (130) is open, the first outlet valve (135) is closed, the second inlet valve (110) is closed, and the second outlet valve (145) is open such that adsorbed oxygen of the second molecular sieve bed (110) is desorbed or withdrawn while the first molecular sieve bed (105) is charging. Similarly, during a charge cycle of the second molecular sieve bed (110), the first input valve (130) is closed, the first outlet valve (135) is open, the second inlet valve (140) is open, and the second outlet valve (145) is closed such that adsorbed oxygen of the first molecular sieve bed (105) is desorbed or withdrawn from the first molecular sieve bed while the second molecular sieve bed (110) is charging. After completion of the charge cycle of the first molecular sieve bed (105), the first outlet valve (135) opens and a surge of gas is vented by the relief valve (155) and after completion of the charge cycle of the second molecular sieve bed (110), the second outlet valve (145) opens and a surge of gas is vented by the relief valve (155). According to a second embodiment of the present invention, the concentrator further comprises a pump which during the charge cycle of the first molecular sieve bed withdraws adsorbed oxygen from the first molecular sieve bed and during the charge cycle of the second molecular sieve bed withdraws adsorbed oxygen from the second molecular sieve bed. <IMAGE></p> |
