Higher efficiencies (reduced KWH consumption) and lower noise levels are the two most sought after features of household refrigerator and freezer compressors the world over. This paper discusses a method by which the suction muffler system of a reciprocating compressor is modified to improve the compressor's efficiency and noise level by reducing suction gas temperature. With low side shell, hermetic compressors, it is very difficult to move the suction gas into the cylinder from outside the compressor shell without a very significant increase in suction gas temperature. Further, when we think about the problems of mass production of high efficiency compressors with suction gas heat separation, there are many other problems to be solved involving reliability, noise levels and manufacturing techniques. This new suction gas muffler system increases compressor efficiency by reducing suction gas temperature. Its operating characteristics offer reliability, lower noise levels, and the design lends itself to mass production manufacturing techniques.
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