Oil supply apparatus for hermetic compressor

Abstract

Disclosed is an oil supply apparatus for a hermetic compressor including an oil feeder mounted at a bottom end of a crank shaft rotated by a driving unit, for sucking oil, an oil passage formed inside the crank shaft, for guiding the oil sucked by the oil feeder, and an oil injection hole formed on a sleeve inserted onto an eccentric unit formed at the top end of the crank shaft, for injecting the oil sucked into the oil passage into a cylinder for compressing fluid. The oil supply apparatus for the hermetic compressor improves efficiency of the compressor by efficiently cooling the cylinder by sufficiently supplying the oil stored at the lower portion of the casing to the cylinder.

1 . An oil supply apparatus for a hermetic compressor, comprising: 
 an oil feeder mounted at a bottom end of a crank shaft rotated by a driving unit, for sucking oil;    an oil passage formed inside the crank shaft, for guiding the oil sucked by the oil feeder; and    an oil injection hole formed on a sleeve inserted onto an eccentric unit formed at the top end of the crank shaft, for injecting the oil sucked into the oil passage into a cylinder for compressing fluid.    
   
   
       2 . The apparatus of  claim 1 , wherein the sleeve is slidably inserted onto the eccentric unit, and has its top surface sealed up, the oil injection hole being formed at the portion of the sleeve facing the cylinder.  
   
   
       3 . The apparatus of  claim 2 , wherein a chamber filled with the oil sucked into the oil passage is formed in the sleeve.  
   
   
       4 . The apparatus of  claim 2 , wherein the oil injection hole is inclined in the rotary direction of the crank shaft.  
   
   
       5 . The apparatus of  claim 4 , wherein the oil injection hole is inclined at 90° from an imaginary line formed from the center of the sleeve in the radial direction.  
   
   
       6 . An oil supply apparatus for a hermetic compressor, comprising: 
 an oil feeder mounted at a bottom end of a crank shaft rotated by a driving unit, for sucking oil;    an oil passage formed inside the crank shaft, for guiding the oil sucked by the oil feeder;    an upper oil injection hole formed at an upper portion of a sleeve inserted onto an eccentric unit formed at the top end of the crank shaft, for injecting the oil sucked into the oil passage into a head cover through which fluid passes; and    a lower oil injection hole formed at the lower portion of the sleeve, for injecting the oil sucked into the oil passage into a cylinder for compressing the fluid.    
   
   
       7 . The apparatus of  claim 6 , wherein the upper oil injection hole and the lower oil injection hole are inclined in the rotary direction of the crank shaft.  
   
   
       8 . The apparatus of  claim 6 , wherein the upper oil injection hole and the lower oil injection hole are inclined at 90° from an imaginary line formed from the center of the sleeve in the radial direction.