(57) A vapor compression refrigerating cycle (1) has a compressor (2), a radiator (3),
a first pressure-reducing means (5), a first gas/liquid separating means, a second
pressure-reducing means (6), an evaporator (8), and a second gas/liquid separating
means, wherein the gas-phase refrigerant separated by the second gas/liquid separating
means is flowed out to a suction side of the compressor (2), and the gas-phase refrigerant
separated by the first gas/liquid separating means is introduced into a midway of
a compression step of the compressor (2), characterized in that the first pressure-reducing
means (5) and the first gas/liquid separating means are integrated with each other,
or/and, the second pressure-reducing means (6) and the second gas/liquid separating
means are integrated with each other, and a heat exchanger (9) for exchanging heat
between the gas-phase refrigerant flowed out from the first gas/liquid separating
means and the gas-phase refrigerant flowed out from the second gas/liquid separating
means is provided. The number of junction parts can be decreased, the structure of
the cycle can be simplified and reduced in cost, and the fear of refrigerant leakage
can be removed, by integrating the gas/liquid separating means and the pressure-reducing
means, and the efficiency as the whole of the refrigerating cycle can be improved
by employing the form of a gas injection cycle.
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