Method and device for supplying modified air

Details Method and device for supplying modified air Method and device for supplying modified air

A - Human Necessities

61

M

A61M 16/00 (2006.01) A61M 16/12 (2006.01)

Patent

CA 2340048

The invention concerns a device wherein oxygen-deficient air is supplied by the compliant bag (1) provided with the switch (1d) which controls the valve (2g) opening when the compliant bag (1) volume reaches its lowest limit (V¿min?) so as to connect the ejector (2) to the nitrogen source (4), to inject nitrogen and suck up ambient air into the ejector (2) and fill up the compliant bag (1) with oxygen-deficient air at ambient pressure and drawn from the respirator (3). The valve (2f) controls ambient air suction into the ejector (2) and adjusts the oxygen content of the air inside the compliant bag (1). The compliant bag (1) is repeatedly filled up to 10 times per minute depending on the amount of air drawn, each time the compliant bag volume reaches its lowest limit (V¿min?). The compliant bag (1) with a useful volume of 20 litres delivers 5 litres per minute of oxygen-deficient air. The invention is particularly useful for sports training sessions to simulate breathing at high altitude.

De l'air appauvri en oxygène est fourni par le sac compliant (1) muni du commutateur (1d) qui commande l'ouverture de la vanne (2g) lorsque le volume du sac compliant (1) atteint sa limite inférieure (Vmin) afin de relier l'éjecteur (2) à la source d'azote (4), d'injecter de l'azote et d'aspirer de l'air ambiant dans l'éjecteur (2) et de remplir le sac compliant (1) d'air appauvri en oxygène à pression ambiante et prélevé par le masque respiratoire (3). La vanne (2f) commande l'aspiration d'air ambiant dans l'éjecteur (2) et ajuste la teneur en oxygène de l'air dans le sac compliant (1). Le remplissage du sac compliant (1) est répété jusqu'à 10 fois par minute en fonction de la quantité d'air prélevée, chaque fois que le volume du sac compliant atteint sa limite inférieure (Vmin). Le sac compliant (1) d'un volume utile de 20 l délivre 5 l/min à 200 l/min d'air appauvri en oxygène. L'invention se prête notamment aux entraînements sportifs permettant de simuler la respiration d'air en haute altitude.

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