| 摘要 |
PROBLEM TO BE SOLVED: To provide a vane rotary type gas compressor implementing high pressure difference required for a CO2 refrigeration cycle. SOLUTION: A low pressure intake compressing portion 23 takes therein low pressure CO2 gas from low pressure intake ports 19, 19-2, compresses the CO2 gas to be intermediate pressure, and discharges the compressed CO2 gas to an intermediate pressure discharge port 21. A high pressure compression intake compressing portion 24 takes therein the intermediate pressure CO2 gas which is discharged from the intermediate pressure discharge port 21, from intermediate pressure intake ports 20, 20-2. The high pressure compression intake compressing portion compresses the intermediate pressure CO2 to be high pressure, and discharges the high pressure gas to a high pressure discharge port 22. Intermediate pressure CO2 gas is replenished with CO2 gas from an external refrigerant gas supply port 28 to make up for shortage of capacity by two state compression.
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