Hi again. Thanks to Pearce & hon1nbo for the directions.
My particular interest is to develop a field engineered complete ventalator system using readily available components. Hope to use the DMS open design culture, even though the space is closed.
Seems it should be easily built in a clean shop and then sterilized as easily as a piece of commercial kitchen equipment. Then would publish plans and build a few hundred & give them to hospitals. I think the FDA piece must be handled properly, Think that will be possible, but it doesn’t matter until there are actual devices. BTW, these devices can be made simple because they could be used for simple and direct cases, leaving the legacy machines to handle the complicated cases.
Personally, have been studying these machines for a few hours. Below I ask any qualified member to contribute a couple of off-the-top-of-their-head numbers.
- Looks to me like a simple 2 stroke engine.
- Need the mixture to be at right pressure, temperature, humidity, flow.
- Need to be able to clear unwanted fluid from the exhaust side.
Somebody: numbers please. Just 2 questions here:
- For a “typical” (sorry I don’t know a better word) use case, at what temp(), pressure(), humidity(_____) to deliver volume(_) what number of times per minute().
- The exhaust cycle should start(patient controlled or timed) seconds() after the end of the intake and should be at a max negative pressure of ().
With the answer to these questions the device can be sized and power requirements determined. I think the values will allow for the build of tabletop unit. If the intake is mostly the atmosphere, then perhaps a floor standing plenum could feed several individual units the right conditions. Got any takers? Somebody that knows a typical range of these valuers please throw them in on a 1st pass level! Thanks.