Compressor

Abstract

Oil sucked by an oil pump and supplied to an opening at an eccentric shaft flows on the top end face of the eccentric shaft to the outer periphery thereof, and splashes from an edge in substantially a radial direction onto the sliding portions of a cylinder and a piston. Thus, the oil can cool the cylinder and piston, form oil film on the sliding portions of the cylinder and piston, restrain metallic contact between the sliding portions, and prevent abrasion between the sliding portions and increasing input into the compressor.

1 . A compressor comprising:
 a hermetic container that stores oil therein and accommodates a compressing element for compressing a refrigerant gas, the compressing element including:
 a crankshaft including an eccentric shaft and a main shaft, and including an oil pump having an opening on a top end face of the eccentric shaft; 
 a cylinder block including a cylinder and a main bearing; 
 a piston inserted into the cylinder and reciprocating; and 
 a suction muffler having a sound-absorbing space formed therein, the sound-absorbing space being in communication with the cylinder; 
   wherein the eccentric shaft has an edge making an acute angle with the top end face, along an outer periphery of a top face of the eccentric shaft.   
     
     
         2 . The compressor of  claim 1 , wherein a chamfer is provided along the opening of the top end face of the oil pump on. 
     
     
         3 . The compressor of  claim 1 , further including a connecting rod for coupling the eccentric shaft to the piston, wherein an external diameter of the edge is dimensioned smaller than that of the eccentric shaft that slides with the connecting rod. 
     
     
         4 . The compressor of  claim 1 , wherein the suction muffler includes an oil-suction hole at a position where the oil splashing from the edge hits directly. 
     
     
         5 . The compressor of  claim 4 , wherein a top section of the suction muffler forms a convex having a curvature exceeding 0 and includes the oil-suction hole near a crest of the top section.