| 摘要 |
PROBLEM TO BE SOLVED: To prevent a decrease in an efficiency of an air conditioning system and to prevent an adverse influence of an oil insufficiency in a compressor by rearranging an oil advancing together with a refrigerant with the refrigerant. SOLUTION: The air conditioning system 10 for a vehicle comprises a compressor 110 having a crank chamber 138, a suction chamber 120 and a discharge chamber 122. A refrigerant mixture contains a carbon dioxide and an oil. To guide the mixture via a passage 13 directly to an oil separator 14, the chamber 122 of the compressor 110 is connected to the separator 14. To throttle a flow of the oil when the oil is advanced directly to the chamber 138 of the compressor 11, only a limiting orifice 17 is provided between the separator 14 and the chamber 138 of the compressor 110.
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