Patent ID: 7600986

Claim:
A multistage compression type rotary compressor comprising an electric element in a hermetic shell case, and first and second rotary compression elements being positioned under the electric element and driven by a rotary shaft of the electric element, wherein refrigerant compressed by said first rotary compression element is discharged into the hermetic shell case, and the discharged intermediate pressure refrigerant is compressed by said second rotary compression element: said multistage compression type rotary compressor further comprising a refrigerant introduction pipe for introducing the refrigerant in the hermetic shell case over the electric element into the second rotary compression element; an oil path formed in the rotary shaft for discharging oil through an oil discharge port positioned at the upper end of the rotary shaft; and an adjusting means for adjusting an inner diameter of the oil discharge port of the oil path, wherein the refrigerant introduction pipe is connected to the hermetic shell case over the electric element, and wherein the refrigerant in the hermetic shell case over the electric element is mixed with the oil discharged through the oil discharge port and is supplied to the second rotary compression element.