Scroll compressor with recesses and protrusions

Abstract

A compressor is provided. The compressor may include a fixed wrap, and an orbiting scroll having an orbiting wrap engaged with the fixed wrap to form compression chambers. The fixed wrap and the orbiting wrap may have irregular wrap curves. At least one interference avoiding portion at which a spacing between the wraps is greater than an orbiting radius or at least one gap compensating portion at which the spacing between the wraps is smaller than the orbiting radius, in a state in which a center of the fixed scroll and a center of the orbiting scroll are aligned with each other, may be provided on a sidewall surface of the fixed wrap or the orbiting wrap, whereby frictional loss or abrasion due to interference between the wraps or a refrigerant leakage due to a gap between the wraps may be prevented.

What is claimed is: 
     
         1 . A compressor comprising:
 a case;   a driving unit fixed to the inside of the case to rotate the rotating shaft;   an orbiting scroll including an orbiting end plate rotatably supporting the rotating shaft, and an orbiting wrap extending from one surface of the orbiting end plate toward an outer circumferential surface of therein;   a fixed scroll including a fixed end plate fixed to the case, and a fixed wrap extending to compress the refrigerant in engagement with the orbiting wrap on the fixed end plate portion; and   wherein the fixed wrap comprises a specific area provided with a thickness greater than a thickness of an area adjacent to the specific area.   
     
     
         2 . The compressor according to  claim 1 , wherein the specific area is disposed in an area extending 360 degrees or more from an inner end of the fixed wrap. 
     
     
         3 . The compressor according to  claim 1 , wherein the thickness of the specific r area is formed to become thicker and then thinner along the extending direction from an inside to an outside of the fixed wrap. 
     
     
         4 . The compressor according to  claim 1 , wherein an outer surface and an inner surface of the specific area are formed to have different radius of curvature. 
     
     
         5 . The compressor according to  claim 1 , wherein a thickness of an area of the orbiting wrap facing the specific area is formed to correspond to a thickness of an adjacent area of the orbiting wrap. 
     
     
         6 . The compressor according to  claim 1 , wherein an inner end of the fixed wrap is formed thicker than the area adjacent to the inner end of the fixed wrap. 
     
     
         7 . The compressor according to  claim 1 , wherein the thickness of an inner end of the fixed wrap is formed to be thicker than the thickness of an outer end of the fixed wrap. 
     
     
         8 . The compressor according to  claim 1 , wherein a center (O 1 ′) of an inner curve of an inner end of the fixed wrap and a center (O 1 ) of the fixed end plate are formed to be spaced apart each other. 
     
     
         9 . The compressor according to  claim 1 , wherein an inner end of the orbiting wrap is provided thicker than the area adjacent to the inner end of the orbiting wrap. 
     
     
         10 . The compressor according to  claim 1 , wherein an inner end of the orbiting wrap is provided to be thicker than an outer end of the orbiting wrap. 
     
     
         11 . A compressor comprising:
 a case;   a driving unit fixed to the inside of the case to rotate the rotating shaft;   an orbiting scroll including an orbiting end plate rotatably supporting the rotating shaft, and an orbiting wrap extending from one surface of the orbiting end plate toward an outer circumferential surface of therein;   a fixed scroll including a fixed end plate fixed to the case, and a fixed wrap extending to compress the refrigerant in engagement with the orbiting wrap on the fixed end plate portion; and   wherein the fixed wrap is provided with an area (A) that is thickened and then thinned while extending from a center of the fixed end plate to an outer circumferential surface of the fixed end plate.