Patent ID: 7802440

Claim:
A compression system comprising: a first compressor including a first compression chamber configured to compress a fluid introduced from an outside of the first compressor, and a first case defining a first space into which the fluid compressed in the first compression chamber is introduced; a second compressor including a second case defining a second space into which the fluid from the first space is introduced, and a second compression chamber configured to compress the fluid from the second space; and a fluid connecting line connecting the first space and the second space and through which the fluid from the first space flows into the second space, wherein: the fluid is transferred into the first compression chamber through an inlet of the first compression chamber, and then is transferred into the first space through an outlet of the first compression chamber after being compressed in the first compression chamber, the fluid, after being transferred into the first space, is transferred into the second space of the second case via the refrigerant connecting line, the fluid, after being transferred into the second space of the second case, is transferred into the second compression chamber through an inlet of the second compression chamber, and then is discharged to the outside of the compression system through an outlet of the second compression chamber after being compressed in the second compression chamber, and each of the first and second spaces contains oil therein, the compression system further comprising an oil connecting line connecting the first space and the second space and through which the oil flows between the first space and the second space.