To provide an inexpensive refrigerating air conditioner of high efficiency and high stability by reducing non-recovery power in accompany with matching.
A second compressor is composed of a speed type fluid machine increasing a pressure by increasing a speed by applying energy to a refrigerant gas and then decreasing the speed, the compression is performed in two stages by the second compressor 10 and a first compressor 20 driven by a motor 50, the second compressor 10 driven by the power recovered from a decompressing/expanding process by an expander 30 is applied in a lower stage side, and a refrigerating cycle capable of recovering expansion power with high efficiency can be constituted by suppressing pre-expansion and bypassing volume performed to satisfy primary flow rate/rotating frequency relationship in a displacement type.
NOMOTO SO
UNEZAKI FUMITAKE
Kiyoshi Yasushima
Souji Sasaki
Noboru Omura
Takanashi Norio
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