Romaurie Effect: Home made vacuum-pump.
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All of us knows that any fridge or HVAC compressor has oil and this oil must return in the device (compressor) for a continued lubricating. But, in the case of a DIY vacuum pump using an air compressor using fridge or HVAC compressors, what we should do with? We know that fridge or HVAC compressors have a myriad of advantages to use it in DIY projects! So, I have to build a vacuum pump with such compressors... Which the best thing to do? Thanks!
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All of us knows that any fridge or HVAC compressor has oil and this oil must return in the device (compressor) for a continued lubricating. But, in the case of a DIY vacuum pump or air compressor using fridge or HVAC compressors, what we should do with? We know that fridge or HVAC compressors have a myriad of advantages to use it in DIY projects! So, I have to build a vacuum pump with such compressors... Which the best thing to do? Thanks!
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@ncbookz as long as there's oil in the compressor it should be fine.
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Yeah, but is it strong enough to suck the photons out of a 'perfect' vacuum?
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hi
im looking for a cheap vac pump to go on a chamber that i have made would this work also do i have to do anything to the pump or can i just use it as it is
barry
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how can he run a compressor with no refrigerant i was told that the air will mess them up moisture and air in the interior would ruin them? was i lied to? anyone answer this please
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The range of compressors from 1/4 H.P. to 1/2 H.P. hold 600cc of refrigerant oil.What I do is add 200cc of re-claimed 3GS oil.A number of refrigeration air conditioning companies change the oil on central cooling systems once a year.The oil removed used sit around the yard until a waste oil company visited to take it.
But, people have written about using other oils in the compressors.Fact is, refrigerant oils are "de-hydrated".Moisture in a refrigeration system is a big problem.
romaurie 8 months ago
I remember reading somewhere about vacuum functions; where a photon strikes a particle, which produces a chain reaction that results in the photon being shot back through time to start the reaction. (Or something like that)
I'm sorry.That is one use of a vacuum pump that is a little "out of my league".
I thought the 30 inches of vacuum measurement we use in refrigeration would also apply to the height a full vacuum would lift a column of water.
It will in fact lift to 6 meters.
romaurie 1 year ago
The only thing I would add to what has been said is to put a container in series with the suction line to "trap" any condense from the chamber.The rest is pretty much common sense.Try and use the original starting relay and klixon[bi-metal circuit breaker] to start it.The very small domestic fridge compressors are still capable of pulling a full vacuum if the flappers are OK.Follow the instructions for doing an oil change.
romaurie 1 year ago
If by "He" you are refering to Romaurie, the perpetrator of this item, That's me, sunshine!
And I've had 6 of these up and running with routine maintenance for 4 years.
The engineers in England who built and used these in 1973 when I joined the proffesion had no trouble with them,Remember, refrigerant pressures are greater than air.You have a constant flow of air through the comp to help cooling.If you are in a very humid enviroment, then maybe a pre-filter would help.
romaurie 2 years ago
A few good quality small vacuum pumps have come on the market now.However, I have noticed a number of engineers using them with little or no oil.When I mentioned this to one engineer he said it only made 20 inches vacuum from new.He should have returned the pump to the dealer after first changing the oil and re-testing.These commercial vacuum pumps have a window for monitoring the oil level.
I change the oil regularly on my old CAE 4440 Hermetique compressor and get 30 inches full vacuum.
romaurie 2 years ago
It rather depends on the condition of the compressor you use.The hermetique comps have thin flapper valves that if run very hot or without oil loose their ability to seal 100%.I use a refrigeration low pressure guage which shows up to 30 inches of vacuum.If it will pull 25 inches in 15 seconds, its in reasonable shape.Always change the oil first.
romaurie 2 years ago