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by amluto
3992 days ago
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Where does that 30 liters per minute go? I'm reasonably sure it's not going into the user's nose or mouth. Part of the claimed innovation here is that the thing sticks directly into the user's nose. If it seals well, it's plausible that there's very little wasted air, which would account for the factor of roughly five. (Also, you used the formula for isothermal compression, I think. A tiny little device like they showed would probably move air quickly enough through its fan that it would be closer to adiabatic. This doesn't matter much for the small pressure change involved.) |
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Putting the whole machine in the nose is novel, but I don't see how that is innovative in terms of changing required functionality compared to nose-only masks, which are already a thing.