Inside a compressor

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Cybrvanr

Well-known member
Joined
Jan 23, 2005
Messages
1,287
After pulling a little Samsung dorm fridge out of the trash and playing around with it's wiring, I determined that the fridge had a bad compressor. I couldn't get any action out of the compressor. A meter check showed a bad run winding. So, I removed the compressor, and cut the top off the metal container, and this is what I found inside:
 
I determined what was wrong with it. The rotor and piston spun freely. The run wire had come loose inside the casing, and that was causing it not to run. With the wire replaced, the compressor started up fine! I plan to use this one as a vacuum pump. You are looking at the side of it. What happens is that the entering freon just goes inside the can. The oil and liquid freon goes to the bottom of the can, while the gaseous freon goes to the top, and gets drawn in the straight tube there. The oil sitting on the bottom lubricates the crankshaft and the piston. Compressed freon leaves through the circuar tube by my hand and heads to the condensor
 
This is how the compressor sits inside the actual can. There are 4 springs it rests on to minimize transferring vibrations to the casing. Now, one of the problems with using a compressor as a vacuum pump is that you cannot get good lubrication because there is no oil in the incoming freon stream. I have the problem solved however. With the compressor sitting in it's can like this, I can pour mineral oil in the bottom of the casing to keep it lubricated without the need for the incoming stream to have it. The input side of the compressor, which is just an open tube in this case, can be brazed to a piece of tubing, and thus run to the mainfold gauges and so forth.
 
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