Compressor

Abstract

The present invention relates to a compressor that can reduce the refrigerant gas pulsation pressure in multi-step when a refrigerant gas is discharged into a rear refrigerant gas discharge chamber toward the outside of the compressor and into a front refrigerant gas discharge chamber toward the outside of the compressor, thereby obtaining excellent reduction in the refrigerant gas pulsation pressure and remarkably reducing a noise due to the refrigerant gas pulsation.

What is claimed is:  
     
         1 . A compressor comprising: 
 a front housing closing one end of a front cylinder block;    a rear housing closing one end of a rear cylinder block;    the front and rear cylinder blocks arranged to be combined with each other between the front housing and the rear housing;    refrigerant gas inlet and outlet ports formed on the outer peripheral surface of at least any of the front and rear cylinder blocks;    a front discharge conduit provided to pass through a first partition defining a front refrigerant gas discharge chamber to be isolated from a front refrigerant gas suction chamber, inside the front refrigerant gas suction chamber, thereby delivering the refrigerant gas discharged into the front refrigerant gas discharge chamber of the front housing toward the outside of the compressor;    a rear discharge conduit provided to pass through a second partition defining a rear refrigerant gas discharge chamber to be isolated from a rear refrigerant gas suction chamber, inside the rear refrigerant gas suction chamber, thereby delivering the refrigerant gas discharged into the rear refrigerant gas discharge chamber of the rear housing toward the outside of the compressor;    front and rear auxiliary expansion portion formed communicating with the outlet sides of the front and rear discharge conduits;    discharge coupling passageways disposed in the front and rear cylinder blocks and connected with the front and rear auxiliary expansion portion; and    a main expansion portion provided between the discharge coupling passageways in such a manner as to communicate with the refrigerant gas outlet port.    
     
     
         2 . A compressor according to  claim 1 , wherein the main expansion portion is formed extending an end of the discharge coupling passageway of the front cylinder block or the rear cylinder block, as an integral body in the front or rear cylinder block.  
     
     
         3 . A compressor according to  claim 1 , wherein the main expansion portion is formed outside the front cylinder block or the rear cylinder block.  
     
     
         4 . A compressor according to  claim 1 , wherein at least one or more the front and rear discharge conduits are positioned at shortest distances between the central portions of the front and rear refrigerant gas discharge chambers of the front and rear housings and the central portions of the inlet ends thereof.  
     
     
         5 . A compressor according to  claim 1 , wherein at least one or more the front and rear auxiliary expansion portion have volumes larger than volumes of the front and rear discharge conduits.  
     
     
         6 . A compressor according to  claim 1 , wherein at least one or more the discharge coupling passageways have passageway sectional areas larger than or the same as passageway sectional areas of the front and rear discharge conduits.  
     
     
         7 . A compressor according to  claim 1 , wherein the main expansion portion has a volume larger than or the same as a sum of volumes of the front and rear auxiliary expansion portion.  
     
     
         8 . A compressor according to  claim 1 , wherein at least one or more the front and rear discharge conduits communicate with the lower face of any of the front and rear auxiliary expansion portion.  
     
     
         9 . A compressor according to  claim 1 , wherein at least one or more the front and rear discharge conduits have passageway sectional areas that become increased toward the outlets from the inlets thereof or become increased step by step.  
     
     
         10 . A compressor according to  claim 1 , wherein a passageway length between the front discharge conduit of the front housing and the refrigerant gas outlet port is the same as a passageway length between the rear discharge conduit of the rear housing and the refrigerant gas outlet port.