| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioning device combining a high pressure vessel type and a low pressure vessel type compressor and balancing oil levels of each compressor without detecting oil levels. SOLUTION: The high pressure vessel type compressor 10 and the low pressure vessel type compressor 11 are combined, a first oil leveling pipe 38 provided with a flow passage resistance 37 is provided to connect a vessel position A of necessary and sufficient oil quantity stored in the compressor 10 and a vessel of the compressor 11, and a second oil leveling pipe 39 is provided to connect a vessel position B of necessary and sufficient oil quantity stored in the compressor 11 and a suction pipe 35a of the compressor 10. Consequently, if the oil returns to one of the compressors, excessive oil stored in each the compressor is supplied to another compressor via the first oil leveling pipe 38 or the second oil leveling pipe 39 to balance quantity of oil stored in both of the compressors without providing an oil level sensor. COPYRIGHT: (C)2004,JPO
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