Hermetic Compressor

Abstract

A hermetic compressor capable of reducing vibration and noise caused by an oil-supply capillary tube during operation thereof. The hermetic compressor comprises a hermetic case, a cylinder block to guide reciprocating movement of a piston, a cylinder head coupled to an end of the cylinder block, a valve unit provided between the cylinder block and the cylinder head to control the flow of a refrigerant, an oil-supply capillary tube having a first end immersed in an oil sump that is defined in a lower region of the hermetic case and a second end communicating with the interior of the cylinder head to supply oil to the valve unit, and a fixing unit integrally formed at the cylinder head to fix the oil-supply capillary tube. With this configuration, the oil-supply capillary tube is securely mounted by the fixing unit during operation of the compressor, resulting in the reduction of vibration and noise.

1 . A hermetic compressor comprising: 
 a hermetic case having an oil sump formed in a lower region thereof;    a piston;    a cylinder block to guide reciprocating movement of the piston therein;    a cylinder head coupled to an end of the cylinder block;    a valve unit provided between the cylinder block and the cylinder head to control the flow of a refrigerant;    an oil-supply capillary tube having a first end immersed in the oil sump and a second end communicating with the interior of the cylinder head to supply oil to the valve unit; and    a fixing unit integrally formed at the cylinder head to fix the oil-supply capillary tube.    
   
   
       2 . The compressor according to  claim 1 , wherein the fixing unit is mounted at opposite edges of a seating groove formed at the cylinder head to securely mount the capillary tube to the cylinder head.  
   
   
       3 . The compressor according to  claim 2 , wherein the fixing unit includes clamps formed by caulking a pair of protrusions which are located to face each other about the seating groove.  
   
   
       4 . The compressor according to  claim 3 , wherein a distance between the pair of protrusions is 1.4 mm to 2.5 mm.  
   
   
       5 . The compressor according to  claim 3 , wherein a distance between facing ends of the pair of clamps is more than 0.5 mm.  
   
   
       6 . The compressor according to  claim 3 , wherein the pair of protrusions is integrally formed with the cylinder head via aluminum die casing.  
   
   
       7 . The compressor according to  claim 1 , wherein the fixing unit includes a plurality of guides arranged in a zigzag pattern while interposing a seating groove to secure an outer circumferential surface of the capillary tube.  
   
   
       8 . The compressor according to  claim 7 , wherein each of the guides has an inner surface that is rounded at an upper end thereof for the smooth insertion of the oil-supply capillary tube.  
   
   
       9 . The compressor according to  claim 8 , wherein a distance between extended planes of the inner surfaces of the guides, that are arranged to face each other by interposing the seating groove, is smaller than an outer diameter of the capillary tube.