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发明授权
CN101395344B 流体机械 有权

流体机械
摘要：
本发明公开了一种流体机械。在作为流体机械的压缩·膨胀机组(30)中，压缩机构(50)和膨胀机构(60)这两个机构被收纳在一个机壳(31)内。在连结压缩机构(50)和膨胀机构(60)的轴(40)中形成有供油通路(90)。储存在机壳(31)底部的冷冻机油被吸入供油通路(90)后向压缩机构(50)和膨胀机构(60)供给。向膨胀机构(60)供给的冷冻机油与膨胀后的制冷剂一起从膨胀机构(60)被排出，在流经制冷剂回路后返回压缩·膨胀机组(30)的压缩机构(50)。
摘要（英）：

In a compression/expansion unit (30) as a fluid machine, both a compression mechanism (50) and an expansion mechanism (60) are stored in a casing (31). An oil feed passage (90) is formed in a shaft (40) for connecting the compression mechanism (50) to the expansion mechanism (60). A refrigerating machine oil accumulated at the bottom of the casing (31) is sucked into the oil feed passage (90) andfed to the compression mechanism (50) and the expansion mechanism (60). The refrigerating machine oil fed to the expansion mechanism (60) is discharged together with a refrigerant after its expansionfrom the expansion mechanism (60), and flows in a refrigerant circuit, and thereafter, returns to the compression mechanism (50).

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