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Thread: Rotary compressor cooling
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21-06-2013, 03:21 PM #1
Rotary compressor cooling
It's a long time since I can't explain myself about the following thing:
Motors of hermetic recip compressors, and scroll compressors are cooled by passing suction refrigerant, which, of course, usually has a low temperature; motor is placed into low pressure side. On the other side, the rotary compressors seems to be built "upside down": the induction motor is on the high pressure side, after the discharge port of the compressor. So, how is this motor cooled, since it's always staying in a very hot gas? On top of this, the compressor is usually wrapped in acoustic insulator, so it can't pass heat to surrounding air. I can't imagine why ALL the rotary compressors are built this way, with motor on the high pressure side.
Thank you!