COMPARISON BETWEEN DIFFERENT ARRANGEMENTS OF BYPASS VALVES IN SCROLL COMPRESSORS

摘要

This paper has constructed a bypass valve or called mechanism in the scroll-type compressor (STC) and integrates it into the developed simulation package. The uncovered area and interval can be found at first, and then the effects to over-compression can be observed for variable operating conditions. By subtle design and adjustment, the suitable arrangement of bypass valves can be found that the uncovered interval can be maintained over the whole working cycle. Hence the consideration for different operating conditions can be discarded, even though the over-compression occurs at any instant during the working cycle, there are conductive passages that can bypass it. Besides, liquid slug, which causes fatal effect to the STC, can also be prevented by using the arrangement of bypass valves.