Muffler system for refrigeration compressor

A hermetic refrigeration compressor comprising a case having a return lined secured thereto, a motor compressor unit mounted inside said case and including a cylinder housing having a single cylinder and piston therein, an electric motor secured to said cylinder housing to drivingly reciprocate said piston in said cylinder, a cylinder head secured to said cylinder housing, said cylinder head including an inlet chamber, a pair of vertically extending suction tubes secured to said cylinder head and opening at their bottom ends into said inlet chamber, a suction muffler secured to the other end of said pair of suction tubes with said other ends extending through the bottom wall a spaced distance into the interior of said suction muffler, said suction muffler comprising a vertically elongated, closed, hollow shell having sidewalls extending longitudinally adjacent said electric motor, said sidewalls defining an inlet opening at the end away from said cylinder head and adjacent said return line on said case.

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 having a single cylinder and a piston therein, an electric motor secured to said cylinder housing to drivingly reciprocate said piston in said cylinder, a cylinder head secured to said cylinder housing, said cylinder head including an inlet chamber and a discharge chamber, suction muffler means connecting said inlet chamber to said return line, discharge muffler means connecting said discharge chamber to said discharge line, said discharge muffler means including first and second muffler chambers connected in series, said chambers being substantially equal in volume and each chamber having a volume of at least three times the swept volume of said piston in said cylinder, an unrestricted large diameter first fluid passage connecting said discharge chamber with said first muffler chamber, a restricted second fluid passage connecting said first muffler chamber to said second muffler chamber, said second passage being longer and of smaller cross-sectional area than said first passage to provide an impedance to flow from said first muffler chamber to said second muffler chamber, and a third fluid passage from said second muffler chamber to said discharge line on said shell.

A hermetic refrigeration compressor comprising a case, a motor compressor unit mounted inside said case and including a cylinder housing having a single cylinder and a piston therein, an electric motor secured to the upper side of said cylinder housing to drivingly reciprocate said piston in said cylinder, a cylinder head secured to said cylinder housing, said cylinder head including a discharge chamber, discharge muffler means connecting said discharge chamber to said discharge line, said discharge muffler means including first and second muffler chambers connected in series, said chambers being substantially equal in volume and formed at least partially by the lower side of said cylinder housing, said muffler chambers being positioned one on each side of the axis defined by said cylinder, each of said muffler chambers having a volume of at least three times the swept volume of said piston in said cylinder, an unrestricted large diameter first fluid passage connecting said discharge chamber with said first muffler chamber, and a restricted second fluid passage connecting said first muffler chamber to said second muffler chamber, said second passage being longer and of smaller cross-sectional area than said first passage to provide an impedance to flow from said first muffler chamber to said second muffler chamber.