To improve the operation efficiency of a refrigerating device by enlarging power generated in an expander while properly controlling a capacity of each use-side unit in the refrigerating device which distributes refrigerants expanded by the expander to a plurality of use-side units.
In an air conditioner (10) being the refrigerating device, a plurality of indoor units (12a, 12b, 12c) being the use-side units are connected to an outdoor unit (11). In a cooling operation of the air conditioner (10), the refrigerants expanded by the expander (35) of the outdoor unit (11) are made to flow into an air/liquid separator (23) and the liquid refrigerants of the air/liquid separator (23) are distributed to the plurality of indoor units (12a, 12b, 12c). Degassing piping (46) for connecting the air/liquid separator (23) and a compressor (30) includes a gas flow rate control valve (47). A controller (13) of the air conditioner (10) adjusts the opening of the gas flow rate control valve (47) so that a pressure difference between the exit of the expander (35) and the entrance of the compressor (30) becomes a predetermined target pressure difference.
KUMAKURA EIJI
UKIBUNE MASANORI
HIWADA TAKESHI
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