FREEZING DEVICE

摘要

Provided is a freezing device (1) including a plurality of compressors formed by a variable-volume compressor (21a) and fixed-volume compressors (21b, 21c) which are connected in parallel to one another.  An intermediate port (5) of the first compressor (21a) as the variable-volume compressor is formed with a smaller diameter than intermediate ports (6, 7) of the second and the third compressors (21b, 21c) as the fixed-volume compressors, so that an intermediate-pressure coolant of an injection circuit can be injected into both compressors (21a) and (21b, 21c) while suppressing the imbalance of the coolant discharge gas temperature generated between the compressors (21a) and (21b, 21c).