Hermetic compressor

Abstract

A hermetic compressor including a cylinder defining a compressing chamber, a piston to rectilinearly reciprocate in the compressing chamber so as to compress a refrigerant, a rotating shaft having an eccentric shaft portion to be eccentrically rotated, and a connecting rod to connect the eccentric shaft portion and the piston to each other so as to convert the eccentric rotation of the eccentric shaft portion into the rectilinear reciprocation of the piston. The connecting rod includes a first coupling portion to be coupled to the eccentric shaft portion, a second coupling portion to be coupled to the piston, and an elastic member having both ends to be secured, respectively, to the first and second coupling portions so as to connect the first and second coupling portions to each other.

1 . A hermetic compressor comprising a cylinder defining a compressing chamber, a piston to rectilinearly reciprocate in the compressing chamber so as to compress a refrigerant, a rotating shaft having an eccentric shaft portion to be eccentrically rotated, and a connecting rod to connect the eccentric shaft portion and the piston to each other so as to convert the eccentric rotating motion of the eccentric shaft portion into the rectilinear reciprocating motion of the piston, wherein
 the connecting rod comprises a first coupling portion to be coupled to the eccentric shaft portion, a second coupling portion to be coupled to the piston, and an elastic member having both ends to be secured, respectively, to the first and second coupling portions so as to connect the first and second coupling portions to each other.   
   
   
       2 . The hermetic compressor according to  claim 1 , wherein the elastic member includes a coil spring. 
   
   
       3 . The hermetic compressor according to  claim 2 , wherein the connecting rod further comprises an anti-distortion member to prevent mutual distortion of the first and second coupling portions. 
   
   
       4 . The hermetic compressor according to  claim 3 , wherein the anti-distortion member comprises a fixing portion formed at one end thereof so as to be fixed to any one of the first and second coupling portions, and an insert portion formed at the other end thereof so as to be inserted into an insertion recess formed in the remaining one of the first and second coupling portions, the insert portion being adapted to move forward or rearward in the insertion recess according to expanding and contracting operations of the elastic member. 
   
   
       5 . The hermetic compressor according to  claim 4 , wherein the insert portion and the insertion recess are configured to prevent mutual relative rotation thereof. 
   
   
       6 . The hermetic compressor according to  claim 5 , wherein the insert portion has a polygonal cross section, and side surfaces of the insert portion come into close contact with the insertion recess. 
   
   
       7 . The hermetic compressor according to  claim 4 , wherein the insert portion is located inside the insertion recess in a state in which no external force is applied to the elastic member. 
   
   
       8 . The hermetic compressor according to  claim 4 , wherein the elastic member is a coil spring, and the anti-distortion member is installed through an interior of the elastic member.