Piston compressor with cooling air flow has induction-side valve opening when piston moves, creating negative pressure in crankcase

摘要

The compressor has a induction-side valve (12) which is moved to the open air induction position when the piston (7a, 7b) moves to create negative pressure in the crankcase (3). The is at least one more valve (20) on the compression side which opens when the piston moves to create excess pressure in the crankcase.