| 摘要 |
The present invention provides an oil equalizing circuit for a refrigeration system provided with a plurality of compression mechanisms, the oil equalizing circuit being capable of supplying sufficient oil to the compressors that are running during partial load operation. The refrigeration system compression mechanism (11) is provided with the following: first, second, and third compressors (21, 22, 23); a refrigerant intake main pipe (24); first, second, and third intake branch pipes (25, 26, 27) connected to the intake sides of the compressors (21, 22, 23); first, second, and third oil separators (28, 29, 30) connected to the discharge sides of the compressors (21, 22, 23); and first, second, and third oil return pipes (31, 32, 33) provided on the oil separators (28, 29, 30). The first oil return pipe (31) is configured such that oil is delivered to the refrigerant intake main pipe (24) due to gravity when only the first compressor (21) is running. The second oil return pipe (32) is configured such that oil is delivered to the refrigerant intake main pipe (24) due to gravity when only the first and second compressors (21, 22) are running. <IMAGE> |
