| 摘要 |
<p>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 (Vmin) 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 (Vmin). 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.</p> |
