| 摘要 |
PROBLEM TO BE SOLVED: To provide a freezer capable of preventing generation of abnormal sound even if the pressure of an intermediate pressing portion of a compressor pulsates.SOLUTION: A freezer includes: a compression device in which a plurality of sets of a variable-capacity compressors 1a and fixed-capacity compressors 1b and 1c are combined; a condenser 3 condensing high-pressure refrigerant compressed by the compression device; overcooling decompression means 21 and 22 for decompressing a part of high-pressure refrigerant condensed by the condenser 3; overcooling heat exchangers 6b and 6c each having a primary channel through which low-pressure refrigerant decompressed by the overcooling decompression means 21 and 22 flows and a secondary channel in which the high-pressure refrigerant condensed by the condenser 3 flows, and cooling the high-pressure refrigerant in the secondary channel; decompression devices 10 decompressing the high-pressure refrigerant cooled in the secondary channels of the overcooling heat exchangers 6b and 6c; evaporators 11 evaporating the low-pressure refrigerant decompressed by the decompression devices 10; and overcooling passages 20b and 20c injecting the refrigerant in the primary channels of the overcooling heat exchangers 6b and 6c into intermediate pressure portions of the fixed-capacity compressors 1b and 1c. |
