Air Con - Air Compressor
Submitted: Friday, Oct 08, 2004 at 17:02
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Twigiee
The idea of converting an old air conditioner compressor into a air compressor for tyres etc has been done before. It seems easy in princeple, but I would've thought its a bit more complicated than just making up brackets and plumbing in a bottle... what about:
1. Would any A/C compressor work or is a specific pressure and flow required?
2. What is the general flow/pressure of an A/C compressor?
3. I presume a pressure relief circuit or valve should be included to prevent overpressure? within the receiver
tank as mechanical pressure relief or electric signal back to compressor clutch?
3. Filter for air intake?
4. Is lubrication for the A/C compressor required?(isn't it usually within the refridgerant?)
I note that a previous post regarding a 240V compressor for $68 - wonder if this could be retro - fitted to a A/C compressor?
Any feedback appreciated, Twigiee
Reply By: Nudenut - Friday, Oct 08, 2004 at 17:41
Friday, Oct 08, 2004 at 17:41
the old
York compressors (fitted to chrysler, ford and plenty of others) came in 3 sizes....6, 9 & 10 cubic inch.
Having ball a bearings on crank would allow running speeds of up to 8000rpm...
well thats where the tabulated data on refrigeration capacities cease.
to determine compressor output multiply speed by cubic inch convert to metric and there you should have it give or take a bit for inefficiencies
AnswerID:
79387
Reply By: Eric Experience. - Friday, Oct 08, 2004 at 22:07
Friday, Oct 08, 2004 at 22:07
Twigiee.
You are right there is more to it than just mounting the unit. you can use air from the engine air cleaner, you must use some sort of oil seperator, the smallest
york I find is the best, even then you can burst the hose if you let it run to long, I mounted a press button on the end of the hose at the air chuck and I dont press the button until the chuck is on the valve. if you only run it when you are actualy pumping up a tyre the oil in the compressor will last for many trips, works a treat. Eric.
AnswerID:
79423
Follow Up By: Twigiee - Monday, Oct 11, 2004 at 10:54
Monday, Oct 11, 2004 at 10:54
Thanks for that info - looks like i need to do a bit more research yet!
Twigiee
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Reply By: ColinD - Wednesday, Oct 27, 2004 at 22:50
Wednesday, Oct 27, 2004 at 22:50
Air-con compressors are capable of more than 250psi. flow depends on size but any would be much better than an elec. one. There are a few different types of compressors, scroll, 5 piston rotary, two cylinder upright to name a few. Personaly I would go for the two piston upright (
York) as this largely uses the crank to splash oil around the internals. As far as the valve lubrication goes, place a small restrictor before the pump inlet, then use a 'valve saver' type setup for LPG engines, and using the vacuum created by the restrictor-this will provide for a small adjustable oil feed to the valves.
Use a pressure switch on the outlet.
You are gone while the others are just starting their second tyre............col
A vacuum idle-up is also a worthwhile project in conjunction with the compressor electrics.................
AnswerID:
82021