| 摘要 |
PROBLEM TO BE SOLVED: To prevent a refrigeration device from causing a malfunction by eliminating the shortage of oil in compressors on a lower stage side and a higher stage side which are linearly connected to a refrigerant circuit for a refrigerant cycle.SOLUTION: A refrigeration device includes an oil adjusting valve adjustment unit configured to set, when an oil surface sensor detects the shortage of oil in a lower stage side compressor 11, the opening degree of a second oil adjustment valve 5 wider than the opening degree when the oil shortage in the lower stage side compressor 11 has been detected with a first oil adjustment valve 6 opened, and to narrow, when the oil surface sensor detects the shortage of oil in a higher stage side compressor 12, the opening degree of the first oil adjustment valve 6 with the second oil adjustment valve 5 closed. |
