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Old 07-08-2012, 06:27   #1
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Pressure cleaner running off eutectic fridge compressor

Hi,
Wondering whether anyone knows whether it's possible to turn an idle eutectic fridge compressor into a pressure cleaner?
Ta
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Old 07-08-2012, 06:34   #2
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Re: Pressure cleaner running off eutectic fridge compressor

Usually no, if what you mean is a pressure washer for water. A typical refrigeration compressor allows refrigerant to circulate in the crankcase.
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Old 07-08-2012, 06:43   #3
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Re: Pressure cleaner running off eutectic fridge compressor

Impossible (unless you have NASAs budget)
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Old 07-08-2012, 06:49   #4
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Re: Pressure cleaner running off eutectic fridge compressor

air and refrigeration compressors pump gas not liquid.I think pressure washing pumps are gear pumps
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Old 07-08-2012, 06:55   #5
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Re: Pressure cleaner running off eutectic fridge compressor

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Originally Posted by DeniseO30 View Post
air and refrigeration compressors pump gas not liquid.I think pressure washing pumps are gear pumps
Not true, the vast majority of pressure washer pumps are in fact piston pumps.
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Old 07-08-2012, 07:26   #6
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Re: Pressure cleaner running off eutectic fridge compressor

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Originally Posted by Sailmonkey View Post
Not true, the vast majority of pressure washer pumps are in fact piston pumps.
why I said; "I think"
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Old 08-08-2012, 09:56   #7
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Re: Pressure cleaner running off eutectic fridge compressor

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Originally Posted by DeniseO30 View Post
why I said; "I think"
No offence meant.....I just wanted to be clear that a gear pump isn't what 99% of pressure washers, or small hydraulic systems for that matter are made of.
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Old 08-08-2012, 10:46   #8
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Re: Pressure cleaner running off eutectic fridge compressor

Did a little reading.. seems they are "plunger" pumps rather then piston. I suppose the difference is that they move liquid in a way that would destroy compressor type pistons.
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Old 08-08-2012, 11:01   #9
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Re: Pressure cleaner running off eutectic fridge compressor

that's correct, a piston/plunger for moving a liquid doesn't' use a timed valve train like an engine, just a check valve.
Either way, a refrigeration compressor has the pumped medium present in the crankcase.....water will kill it.
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Old 08-08-2012, 12:29   #10
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Re: Pressure cleaner running off eutectic fridge compressor

An excellent series of tutorials, by Joe Evans, Ph.D:
Pump Ed 101Pump Ed 101
including
Positive Displacement Pumps
Reciprocating (Piston & Plunger)http://www.pumped101.com/recip.pdf
Rotaryhttp://www.pumped101.com/rotary.pdf
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Old 08-08-2012, 16:03   #11
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Thanks everyone! Most educational. Seems like a larger generator to drive a pressure cleaner or some elbow grease will have to be the go.
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Old 08-08-2012, 16:53   #12
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Re: Pressure cleaner running off eutectic fridge compressor

Still must exist a bypass valve on a water pressure pump. One I took apart had 3 plungers in a triangle arrangement and I think was driven by a waffle plate.
It cracked, it was a Karcher. When it cracked water leaked everywhere.
Out of 3 Karchers I know about, all three of them failed in their pumps.

Otherwise, I liked it a lot being electric.
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