Reciprocating compressor

Abstract

Disclosed is a reciprocating compressor comprising a piston having a suction path connected to a compression space in the cylinder. A suction valve is mounted at an end surface of the piston for opening and closing the suction path and a discharging valve assembly is mounted at a discharge side of the cylinder for controlling gas discharge by opening and closing the compression space. An adhesion preventing unit is formed at the end surface of the piston or at a contact portion of the piston and the suction valve for minimizing adhesion between the piston and the suction valve due to oil by reducing a contact area between the piston and the suction valve.

What is claimed is:  
     
         1 . A reciprocating compressor comprising: 
 a piston which reciprocates in a compression space of a cylinder by being engaged with a reciprocating motor and which has a suction path connected to the compression space of the cylinder;    a suction valve mounted at an end surface portion of the piston to control gas suction by opening and closing the suction path of the piston;    a discharging valve assembly mounted at a discharge side of the cylinder to control gas discharge by opening and closing the compression space; and    an adhesion preventer positioned at a contact portion between the end portion surface of the piston and the suction valve to minimize adhesion of the piston and the suction valve due to oil by reducing a contact area between the piston and the suction valve.    
     
     
         2 . The compressor of  claim 1 , wherein the adhesion preventer is provided at an end portion surface of the piston.  
     
     
         3 . The compressor of  claim 2 , wherein the adhesion preventer comprises a groove.  
     
     
         4 . The compressor of  claim 3 , wherein the adhesion preventer is a groove having a depth of about 20-200 μm.  
     
     
         5 . The compressor of  claim 1 , wherein an oil back flow preventing protrusion is provided at the end portion of the suction path located at a front surface of the piston.  
     
     
         6 . The compressor of  claim 5 , wherein the adhesion preventer is provided at the suction valve.  
     
     
         7 . The compressor of  claim 6 , wherein the adhesion preventor is a groove.