Suction muffler for refrigeration compressor

Claim 1

In a hermetic refrigeration compressor comprising a case having discharge and return lines secured thereto, a motor compressor unit mounted inside said case and including a cylinder housing and a cylinder head secured to said cylinder housing, said cylinder head including an inlet port and a discharge port, discharge muffler means connecting said discharge port to said discharge line, and a suction muffler connected to said inlet port, the improvement comprising said suction muffler comprising an elongated hollow shell of plastic insulating material, said shell having a sidewall and a pair of end walls defining an enclosed chamber, one of said end walls having an outlet opening from said enclosed chamber, said one end wall having a tubular projection around said outlet opening and extending into said enclosed chamber, a suction tube fixedly secured to said cylinder head and extending through said outlet opening into said enclosed chamber and contacting said tubular projection with a sliding push fit, the other of said end walls having an inlet opening into said enclosed chamber, an outwardly flaring horn around said inlet opening extending adjacent said case at said return line so that refrigerant from said return line is directed into said horn and said enclosed chamber with a minimum of turbulence.