8. Structure of a refrigerator or liquefier

8.1 Compressor station

The compressor station (figure 46 ) consists of :

• one or more cycle compressors, each generally driven directly by its own motor;

• helium de-oiling, oil and helium cooling system;

• cycle pressure control system, which includes cycle buffer capacity.

Compressors and control valves are very noisy objects, so they are either enclosed in soundproof enclosures or housed in a special room. Cycle buffers take up a lot of space and are installed outside.

The compressor station...