| 摘要 |
PROBLEM TO BE SOLVED: To provide an efficient expansion device for power recovery without loss of sliding or leaking accompanying sealing which is required for a compressor side and an expansion device side as spaces of a compression mechanism part and an expansion mechanism part which are different in pressure or temperature are conventionally located adjacent to each other in a sealed container, in a refrigerating air conditioner for recovering expansion power in a supercritical cycle. SOLUTION: The efficient expansion power recovery cycle is enabled by making the sealing between the compressor side and the expansion mechanism side unnecessary, using a two-step compression/two-step expansion cycle by the compressor with a low step and a high step and a decompression mechanism of a high pressure side and a low pressure side to store the decompression mechanism for recovering expansion power and the compressor of the high step in the sealed container filled with intermediate pressure of the high and the low pressure, and in a gas-liquid separation cycle, sucking refrigerant from an upper space of the sealed container by the high step compressor and sucking the refrigerant from a lower part of the sealed container by the low step side decompression mechanism. COPYRIGHT: (C)2005,JPO&NCIPI
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