Patent ID: 9636565
Date: 2017-05-02
CPC Classifications: A61G,A63B,F24F,Y02B

Claim:
1. A recreation room comprising: a floor and a ceiling separated by at least one wall and forming a room, the room being filled with room air and being adapted to hold at least a slight overpressure in relation to an outside atmosphere surrounding the recreation room, at least for a short period of time, wherein the recreation room is communicated by way of a room air inlet opening and a room air outlet opening to a room air installation which is adapted to adjust the room air in the recreation room so that its oxygen partial pressure is lower than the oxygen partial pressure of the outside atmosphere; a circulatory air passage connected to said room air inlet opening and said room air outlet opening; and a pump or blower for moving circulatory air in the circulatory air passage; a mixing chamber connected in the circulatory air passage and having a chamber air inlet communicating with said room air outlet opening and a chamber air outlet communicating with said room air inlet opening via said circulatory air passage, an atmosphere air inlet for ambient air from an outside atmosphere and a nitrogen inlet for the feed of nitrogen into the mixing chamber, and an air separator, wherein the air separator is in fluid communication with the room and with the nitrogen inlet, and additionally wherein the air separator is adapted to remove room air and to separate removed room air into a nitrogen-enriched portion and an oxygen and carbon dioxide-enriched portion and to provide the nitrogen enriched portion to the nitrogen inlet.