Komprssors

he radiator cooled passes through it a stream of air, which is pumped into the compressor by a fan (14) installed on the shaft of the electric motor (6).
All panels of the compressor during operation must be necessarily closed, this is precisely the most effective direction of air movement, which ensures the selection of heat produced during compression. It is possible to re-use the heated air, for example, to heat the premises in the winter. From the above it follows that a screw pair can only work if it is constantly in the air-oil mixture.

https://bitbucket.org/faustjonson/writers-online/downloads/kompressor6.pdf
http://avto-vukyp.com/images/sampledata/parks/kompressors7.pdf