Breathing gas supply system

Details Breathing gas supply system Breathing gas supply system

A - Human Necessities

62

B

A62B 7/14 (2006.01)

Patent

CA 2462078

A breathing gas supply system (10) for an aircraft includes a plurality of oxygen concentrating apparatus (12, 13, 14 N), each of which in use, is operable to supply oxygen enriched gas to a breathing gas supply (11), each oxygen concentrating apparatus (12, 13, 14 N) including at least two active molecular sieve beds (12a, 12b; 13a, 13b; 14a, 14b Na, Nb) which are operable so that whilst one sieve bed is adsorbing non-oxygen gas from a pressurised gas supply, the or another bed is being purged of non-oxygen gas by subjecting the bed to lower pressure, each oxygen concentrating apparatus (12, 13, 14 N) including an oxygen enriched gas flow control device (F1, F2, F3 Fn) which permits the flow of oxygen enriched gas produced by the oxygen concentrating apparatus (12, 13, 14 N) to the breathing gas supply (11) and permits a restricted flow of oxygen enriched gas from the breathing gas supply (11) to the oxygen concentrating apparatus (12, 13, 14 N), there being a flow path for oxygen enriched gas produced by the adsorbing sieve bed of the oxygen concentrating apparatus (12, 13, 14 N) direct to the bed being purged.

L'invention concerne un système d'alimentation en gaz respiratoire (10), pour avion, comprenant une pluralité d'appareils concentrant l'oxygène (12, 13, 14, N), dont chacun s'utilise en service, pour alimenter en gaz enrichi en oxygène, un système d'alimentation en gaz respiratoire (11), chaque appareil de concentration d'oxygène (12, 13, 14, N) comprenant au moins deux lits de tamis moléculaires (12a, 12b ; 13a, 13b ; 14a, 14b, Na, Nb) s'utilisant de sorte que lorsqu'un lit de tamis adsorbe du gaz non oxygène provenant d'un système d'alimentation en gaz sous pression, l'autre ou un autre lit soit vidé de gaz non oxygène, par exposition à une pression plus basse, chaque appareil de concentration d'oxygène (12, 13, 14, N) comprenant un dispositif de régulation de flux de gaz enrichi en oxygène (F1, F2, F3, Fn), qui permet au flux de gaz enrichi en oxygène produit par l'appareil de concentration d'oxygène (12, 13, 14, N) de parvenir jusqu'au système d'alimentation en gaz respiratoire (11) et à un flux restreint de gaz enrichi en oxygène provenant du système d'alimentation en gaz (11) de parvenir jusqu'à l'appareil de concentration ne oxygène (12, 13, 14, N), ce qui produit une voie d'écoulement pour le gaz enrichi en oxygène produit par le lit de tamis adsorbant de l'appareil de concentration en oxygène (12, 13, 14, N) menant directement jusqu'au lit en cours de purge.

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