Compressor Cooling

[Takeshi]

Now I know that hermetic compressors are cooled by the incoming gas from the suction, but how are semi-hermetic compressors cooled, as when I have seen them apart the gas only passes through the head of the compressor, and no where around the windings

Please help me understand

[chillin out]

The condensor fan usually blows across the compressor thus keeping it cool.

Chillin

[chemi-cool]

Hi Takeshi,

You must be talking about small, low temp. compressors.

These machines are designed for high motor temp.

C an go as high as 80°C.

Chemi

[Takeshi]

Really? Thanks for clearing that up

I knew the condensor fan helped - but I thought that this wouldn't really be efficient enough? But I guess it is

And yeah I'm on about 1/2Hp - 10HP compressors, like Prestcold's etc

[Samarjit Sen]

Generally the semi hermetics have either Air Cooled Compressors or Gas Cooled Compressors. For larger units you will require additional fans for the air cooled types and with these you can attain a low temperature.

[joe magee]

I usually see body cooling fans on that style of compressor if it's a low temp high compression machine. -10 saturated and lower.

regards,
Joe magee

[Quality]

Insulation Class H allows the motor windings to operate at upto 130 degrees conductor temp without a problem