Scroll compressor with vapor injection and unloader port
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United States of America Patent
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Mar 9, 2010
Grant Date -
May 8, 2008
app pub date -
Nov 7, 2006
filing date -
Nov 7, 2006
priority date (Note) -
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Abstract
A scroll compressor is provided with a passage for providing both an unloader function and an economizer injection function. This common passage communicates with separate ports. The ports that are exclusively used for by-pass unloading operation are open only during by-pass unloading operation, but blocked off by a check valve during vapor injection operation. The other, normally smaller vapor injection ports are open for both vapor injection and by-pass unloading operation. By utilizing these two sets of ports, a smaller total port area is provided for vapor injection operation and a much larger total open port area for by-pass operation. The different open port areas for by-pass unloading operation and vapor injection operation allows optimization of compressor operation at both of those regimes of operation.
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