| 摘要 |
PURPOSE:To improve the airtightness between each scroll so as to obtain greater vacuum by sealing lubricating oil in the other container, and providing the scroll with a lubricator which permits the lubricating oil transferred from a discharge port to return thereto partly. CONSTITUTION:Lubricating oil is sealed in a container 3. A lubricator 26 is provided in such that it has the upper portion of an exhaust path 1d connected with a compressor chamber A so as to feed oil into the compression chamber A. Additionally, the lubricator 26 permits the oil transferred from a discharge port 1c to partly return to the compression chamber A. The cross-sectional area of the lubricator 26 is determined in terms of dimension in such that the volume V of the small chamber A is roughly equal to the oil return quantity q per each rotation of both scrolls 1, 2. Hence the airtightness between each scroll is remarkably improved and greater vacuum can be obtained.
|
