Electronics > Projects, Designs, and Technical Stuff
guidebook on medium freon compressors interfacing?
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Yansi:

--- Quote from: amyk on January 16, 2019, 01:33:47 am ---
--- Quote from: blueskull on January 15, 2019, 11:13:43 pm ---
--- Quote from: coppercone2 on January 15, 2019, 11:11:31 pm ---is it a specific gas that requires licensing or just the concept of a compressor?

--- End quote ---

Common refrigerants require a license to buy, unless you get those automotive ones from Walmart.
Even those automotive ones have warnings, and generally, regardless of type, you are not supposed to release refrigerants to air, so you need refrigerant pumps and a three way gauge.

--- End quote ---
The "duster air" cans basically contain refrigerant (usually 134 or 152 these days), you can find videos of people recharging AC systems with them. So do the propellants in other types of aerosol cans, and of course people release those into the environment all the time... you're probably being better for the environment and making better use of the gas to put it in a closed refrigeration system, yet the EPA probably thinks that illegal... go figure. :-//

For the OP, this is probably something you'll find the answer to in refrigeration books and forums (not the kind full of commercial servicers, mind you --- they'll just brag about their EPA license and tell you to piss off), because you don't seem to be asking much in the way of electronics.

--- End quote ---

Very good point! Those "air" dusters are typically filled with an R134A refrigerant. It is I think one of those requiring quite low head pressure in the system and can cool down to quite some temperature.

That's because you couldn't fit very much compressed air in the can, and it would also require substantial pressure, which is dangerous. R134a or Butane can live in a can with a rather low pressure at room temp.

Also, lighter gas (butane) or such can be used for a diy refrigeration system.
coppercone2:
oh yea man with duster, you can buy this thing at harbor fright which is like a penetrator for a can of duster so you can securely match it to your cars air compressor. It looks like something Henry the eighth would use on 'missing ladies'.

edit: don;t know whats its called, I saw it on a youtube car mechanic channel before. It looks like a ring with a brass nozzle in it with a screw thread that connects to a hose, so you put the can inside of it and the thing works like one of those 'pipe clamps' that you are supposed to use in a emergency to stop a leak in your wall if you don't have access to a shutoff valve.

wow wtf, I can't find any reference to it. It came in a crappy pack like old action figures in the 90's where you have a paper backpeel and a front plastic clam. It was like 5$.

Ah here is one version of something similar
amyk:
The phrase you're looking for  is "side can tap".
David Hess:
They make units for chilling an antifreeze solution which you then pump through whatever heat exchanger you want.  Why not use one of those instead of trying to design an air conditioner from scratch?
coppercone2:
still probobly going to the be the size of a refrigerator and look like shit, + I was always interested in making one

I find it to be a very interesting design challenge as well. You get to test your skills in brazing, pipe bending, high tightness joints, etc.
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