US 6,605,132 B2 · Air treatment system

Abstract

A system for treating air for supply to an enclosed space in which the air is to be breathed, includes an inlet through which air can enter the system from atmosphere for supply to the enclosed space, and a regenerative adsorption assembly having at least two chambers which contain an adsorbent material, arranged so that air flowing in the inlet for supply to the enclosed space can pass through one of the chambers for adsorption of contaminants before supply to the enclosed space while adsorbent material in another of the chambers is purged of adsorbed contaminants. A recirculation path is provided for supplying air from the enclosed space to the inlet to be mixed with air from atmosphere before it is supplied to the enclosed space. The system includes structure for adjusting the resistance to flow of air through the recirculation path.

Claims21

Dependent claims

A method of treating air for supply to an enclosed space in which it is to be breathed, the method comprising:

providing contaminated air from the atmosphere and/or contaminated air recirculated from the enclosed space, the contaminated air comprising carbon dioxide and contaminants, the contaminants being other than oxygen, carbon dioxide, and nitrogen;
passing the contaminated air through a first chamber of a regenerative adsorption assembly, the regenerative adsorption assembly comprising at least two chambers, wherein each chamber of the regenerative adsorption assembly contains an adsorbent material for adsorption of (i) the carbon dioxide in the contaminated air, and (ii) the contaminants in the contaminated air, wherein the regenerative adsorption assembly produces treated air that has an acceptable composition for breathing;
and
supplying the treated air from the regenerative adsorption assembly to the enclosed space.

1 more element

Dependencies are inferred from the claim text.

Air treatment system

Life of this patent

Air treatment system

Life of this patent

Abstract

Claims21