| 摘要 |
This two-stage pressure boosting type refrigeration cycle (10) has suction-side guide sections (101a, 101d) provided in a portion of a low stage-side suction pipe (101), said portion extending to a refrigerant suction side of a low stage-side compressor (11) from a bypass branch section (22) from which the low stage-side suction pipe (101) branches off to a bypass pipe (105), wherein the suction-side guide sections (101a, 101d) guide lubricating oil from the refrigerant suction side of the low stage-side compressor (11) to the bypass branch section (22) side. The positions of the suction-side guide sections (101a, 101d) in the vertical direction are equal to or higher than that of the bypass branch section (22) in the vertical direction, and a portion (101b) on the refrigerant suction side of the low stage-side compressor (11) is higher than a portion (101c) on the bypass branch section (22) side in the vertical direction. |
