Cylinder assembly of compressor

Abstract

A cylinder assembly of a compressor includes: a cylinder having a cylindrical inner space partitioned into a first space and a second space as partition plate of a rotational shaft is inserted thereinto and a step insertion portion formed at both sides thereof in a ring shape; a first bearing having the rotational shaft coupled at a central portion and being inserted to be coupled into the step insertion portion formed at one side of the cylinder so as to cover the inner space of the cylinder; and a second bearing having the rotational shaft coupled at the central portion thereof and being inserted to be coupled into the step insertion portion formed at the other side of the cylinder so as to cover the inner space of the cylinder. A dead volume is reduced and thus a re-expansion loss of a refrigerant gas can be reduced.

1 . A cylinder assembly of a compressor comprising: 
 a cylinder having a cylindrical inner space partitioned into a first space and a second space as partition plate of a rotational shaft is inserted thereinto and a step insertion portion formed at both sides thereof in a ring shape;    a first bearing having the rotational shaft coupled at a central portion and being inserted to be coupled into the step insertion portion formed at one side of the cylinder so as to cover the inner space of the cylinder; and    a second bearing having the rotational shaft coupled at a central portion and being inserted to be coupled into the step insertion portion formed at the other side of the cylinder so as to cover the inner space of the cylinder.    
     
     
         2 . The cylinder assembly of  claim 1 , wherein an outer diameter of the first and second bearings and an inner diameter of the step insertion portion of the cylinder are formed to be corresponded each other.  
     
     
         3 . The cylinder assembly of  claim 1 , wherein the inner diameter of the step insertion portion of the cylinder is greater than the outer diameter of the inner space formed inside the cylinder.  
     
     
         4 . A cylinder assembly of a compressor comprising: 
 a cylinder having a cylindrical inner space partitioned into a first space and a second space as partition plate of a rotational shaft is inserted thereinto and a step insertion portion formed at both sides thereof in a ring shape;    a first bearing having the rotational shaft coupled at a central portion and being inserted to be coupled into the step insertion portion formed at one side of the cylinder so as to cover the inner space of the cylinder;    a second bearing having the rotational shaft coupled at a central portion and being inserted to be coupled into the step insertion portion formed at the other side of the cylinder so as to cover the inner space of the cylinder;    vanes respectively inserted into the first and second bearings and changing the first and second spaces of the cylinder into a suction area and a compression area as the partition plate coupled to the rotational shaft is rotated;    an elastic support unit elastically coupled between the first and second bearings and the vanes; and    an opening and closing unit for opening and closing a discharge hole penetratingly formed at the first and second bearings.    
     
     
         5 . The cylinder assembly of  claim 4 , wherein an outer diameter of the first and second bearings and an inner diameter of the step insertion portion of the cylinder are formed to be corresponded each other.  
     
     
         6 . The cylinder assembly of  claim 1 , wherein the inner diameter of the step insertion portion of the cylinder is greater than the outer diameter of the inner space formed inside the cylinder.  
     
     
         7 . The cylinder assembly of  claim 4 , wherein the elastic support unit is a compression coil spring.  
     
     
         8 . The cylinder assembly of  claim 4 , wherein the elastic support unit is a plate spring.