| 摘要 |
A lubrication path (50) to press-contact surfaces of a fixed and orbiting scrolls (21, 22) serves also as a high-level pressure introduction passageway when a difference between a high-level pressure and a low-level pressure is great. On the other hand, when the high-level pressure introduction passageway is blocked off in a state in which the high-low pressure difference is small, refrigerating machine oil is supplied to the press-contact surfaces through a low-level pressure space (S1) within the casing, for controlling the pressing force of the orbiting scroll (22) against the fixed scroll (21), and the construction for preventing a decrease in efficiency is simplified, thereby not only reducing the cost but also preventing the occurrence of a maloperation. <IMAGE> |
