| 摘要 |
<p>PURPOSE:To prevent lubricating oil from being mixed into a refrigerant and flowing out of the inside of a crank case by providing in a passage communicating a crank room with a delivery port a check valve which blocks the passage when pressure within the crank room becomes larger than that within the delivery port. CONSTITUTION:A check valve 70 which when pressure within a crank room 12 becomes larger than that within a delivery port 33 blocks a passage communicating the crank room 12 with the delivery port 33 is provided within the passage. When pressure within the crank room 12 becomes larger than that within the delivery port 33, the check valve 70 blocks the passage communicating the crank room 12 and the delivery port 33 with each other. Then movement of a refrigerant from inside the crank room 12 to the delivery port 33 is prevented so as to prevent lubricating oil from being mixed into the refrigerant and flowing out of the inside of a crank case.</p> |
