Hermetic compressor

Abstract

Stopper contains abutment section at a position that corresponds to arm section so as to keep a clearance from arm section of discharge reed. The structure above allows discharge reed to have two-stage spring characteristics; discharge reed exhibits a weaker springiness until arm section abuts against abutment section, and then exhibits a stronger springiness after the abutment. Employing the discharge reed having the two-stage characteristics allows discharge valve unit to easily open and quickly close without delay. Such structured hermetic compressor enhances energy efficiency, preventing degradation in refrigeration performance.

1 . A hermetic compressor comprising:
 a cylinder in which a piston has a reciprocal movement;   a valve plate that seals an opening end of the cylinder and has a discharge valve unit on a side opposite to the cylinder, and   a head having a discharge chamber for accommodating the discharge valve unit,   the discharge valve unit further including:   a discharge hole disposed on the valve plate so as to have communication with an inside of the cylinder;   a valve seat section formed outside the discharge hole;   a discharge reed that is made of leaf spring material and contains an opening/closing section for opening and closing the discharge hole and an arm section; and   a stopper for restraining opening of the discharge reed, the stopper further including:   an abutment section disposed at a position corresponding to the arm section so as to keep a clearance from the arm section.   
     
     
         2 . The hermetic compressor of  claim 1 , wherein the stopper contains a restraint section that has a clearance at a position corresponding to the opening/closing section so as to be greater than the clearance of the abutment section. 
     
     
         3 . The hermetic compressor of  claim 1 , wherein the discharge reed and the stopper are fixed to the valve plate. 
     
     
         4 . The hermetic compressor of  claim 1 , wherein the stopper is molded on the head. 
     
     
         5 . The hermetic compressor of  claim 2 , wherein abutment surfaces of the abutment section and the restraint section are made of a solid lubricating material. 
     
     
         6 . The hermetic compressor of  claim 2 , wherein the discharge reed and the stopper are fixed to the valve plate. 
     
     
         7 . The hermetic compressor of  claim 2 , wherein the stopper is molded on the head.