| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam compression type refrigeration cycle employing an injection system, capable of reducing power consumption of a compressor.SOLUTION: A steam compression type refrigeration cycle can switch between an injection operation and a non-injection operation, and controls a communication state of an oil supply circuit Lo according to an operation state of a second compressor 9B. Consequently, changeover between the injection operation and the non-injection operation can be performed to reduce power consumption of a compressor, and refrigeration oil in the second compressor 9B can be prevented from being made into an insufficient state.SELECTED DRAWING: Figure 1 |
