| 摘要 |
In a scroll apparatus for fluid compression, two interfitting involute scroll elements with inner wall surfaces, each defined by an inner tip portion, an adjacent intermediate portion, an outwardly tending arcuate portion for periodic engagement in moving line contact with the inner tip of the other respective scroll element, and an involute portion extending from the arcuate portion to an outer end of the scroll element. When the involute scroll element inner tip is in moving line engagement with the arcuate portion of the other element, the scroll elements cooperates to define sealed final compression chambers of decreasing volume bounded by the intermediate portion of the scroll elements adjacent the respective inner tips, providing an extended duration of final compression as compared to a scroll apparatus having modified scroll elements. Furthermore, the arcuate portions and intermediate portions define an involute scroll wrap element having a thickened inner tip portion for increased strength and improved discharge flow from the final compression chambers to the discharge port.
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