| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a refrigeration device that can prevent poor lubrication even with a reduced amount of oil in a compressor while optimizing an amount of oil returning. <P>SOLUTION: The refrigeration device is configured to: adjust the opening degree of an electric valve 30 disposed in an oil return tube 28A in response to the operation frequency of compressors 11, 11; stop the operation of the compressor 11 when the level of oil in a case 12 of one of the compressors 11 falls below a lower limit level when the compressors 11, 11 are in operation; and resume the operation of the compressor 11 when the level of the oil goes beyond a predetermined level. <P>COPYRIGHT: (C)2013,JPO&INPIT |
