Patent ID: 7931733

Claim:
A method for producing a hypoxic atmosphere in an enclosed compartment with extraction of excessive carbon dioxide and water vapor out of the internal atmosphere of said compartment, said method comprising: recycling of the internal compartment atmosphere through an air-separation device that extracts some carbon dioxide, water vapor and oxygen from it, so that a gas mixture with a reduced oxygen, carbon dioxide and moisture content being returned back into said compartment; disposing the extracted fraction of the recycled atmosphere at a location outside of said compartment; delivering fresh air into said compartment for compensating the loss of said extracted portion and for controlling the internal atmospheric parameters, selected from but not limited to: internal atmospheric pressure, a content of oxygen, carbon dioxide, moisture, ammonia and other gases that may be produced by a human, animal or equipment inside said compartment; controlling internal atmospheric condition using control panel settings and feedback data from sensors to control panel; said sensors measuring said internal atmospheric parameters; said method allowing to provide a comfortable for respiration environment with oxygen content between 10% and 20.9% and carbon dioxide content in the range from 0.0035% to 3%.