Scroll compressor

Abstract

A scroll compressor is disclosed. The scroll compressor has a housing including an accommodation space, an inlet port on one side of the housing in a length-wise direction of the housing, and a discharge port on another side of the housing in the length-wise direction of the housing. The scroll compressor also has a motor disposed in the accommodation space, a fixed scroll disposed in the accommodation space, and an orbiting scroll disposed between the motor and the fixed scroll. The fixed scroll may be closer to the discharge port than to the motor, and the orbiting scroll module may be engaged with the fixed scroll to form a compression chamber.

What is claimed is: 
     
         1 . A scroll compressor, comprising:
 a housing comprising:
 an accommodation space; 
 an inlet port on one side of the housing in a length-wise direction of the housing; and 
 a discharge port on another side of the housing in the length-wise direction of the housing; 
   a motor disposed in the accommodation space;   a fixed scroll disposed in the accommodation space, the fixed scroll being closer to the discharge port than to the motor; and   an orbiting scroll module disposed between the motor and the fixed scroll, the orbiting scroll module being engaged with the fixed scroll to form a compression chamber, wherein:
 the motor comprises a stator fixed to the housing, and a rotor placed outside of the stator in a diameter-wise direction of the stator, 
 the rotor is configured to rotate around the stator, 
 the orbiting scroll module is disposed between the rotor and the fixed scroll, and 
 the orbiting scroll module is directly connected to the rotor and is orbited by rotation of the rotor. 
   
     
     
         2 . The scroll compressor of  claim 1 , wherein
 the rotor comprises:
 a skirt configured to encircle an outer surface of the stator in the diameter-wise direction of the stator, and 
 a rotation surface configured to form a flat surface facing the orbiting scroll module, 
   wherein the rotation surface is coupled to the skirt and disposed closer to the orbiting scroll module than the skirt,   the skirt and the rotation surface are configured to rotate outside of the stator integrally, and   the orbiting scroll module is directly connected to the rotation surface and is orbited by rotation of the rotor.   
     
     
         3 . The scroll compressor of  claim 2 , wherein
 the motor further comprises an eccentric shaft placed eccentrically with respect to the rotation surface, and   the orbiting scroll module is coupled to the eccentric shaft and is configured to orbit along the eccentric shaft.   
     
     
         4 . The scroll compressor of  claim 3 , wherein the orbiting scroll module comprises:
 an orbiting scroll comprising an orbiting head plate configured to form a flat surface parallel to the rotation surface;   an orbiting lap protruding from the orbiting head plate in a thickness-wise direction of the orbiting head plate; and   a concave coupling groove formed on one surface of the orbiting head plate facing the rotation surface,   wherein the eccentric shaft is rotatably inserted into and coupled to the coupling groove.   
     
     
         5 . The scroll compressor of  claim 4 , wherein the scroll compressor further comprises a driving bearing fixed to the coupling groove and rotatably coupled to the eccentric shaft. 
     
     
         6 . The scroll compressor of  claim 2 , wherein the orbiting scroll module comprises:
 an orbiting scroll comprising an orbiting head plate configured to form a flat surface parallel to the rotation surface;   an orbiting lap protruding from the orbiting head plate in a thickness-wise direction of the orbiting head plate; and   a first projection protruding outward from the orbiting head plate in a diameter-wise direction of the orbiting head plate,   wherein the scroll compressor further comprises a second projection configured to interfere with the first projection to block self-rotation of the orbiting scroll.   
     
     
         7 . The scroll compressor of  claim 6 , wherein the housing is a first housing and the scroll compressor further comprises:
 a second housing disposed on the another side of the first housing, wherein the second housing comprises the discharge port and is configured to cover the opening.   
     
     
         8 . The scroll compressor of  claim 7 , wherein the second housing comprises;
 a cover configured to cover the opening; and   a coupler forming a surface parallel to an outer circumferential surface of the first housing, the coupler being coupled to the other side of the first housing in the length-wise direction of the first housing and configured to couple the cover to the first housing.   
     
     
         9 . The scroll compressor of  claim 8 , wherein
 the fixed scroll is placed on an inner surface of the cover facing the motor or the orbiting scroll module in the accommodation space, and   the discharge port is coupled to the fixed scroll while passing through the cover.   
     
     
         10 . The scroll compressor of  claim 9 , wherein
 the first projection protrudes from the orbiting head plate toward the coupler, and   the second projection protrudes from an inner surface of the coupler toward the orbiting head plate.   
     
     
         11 . The scroll compressor of  claim 10 , wherein
 the first projection is one of a plurality of first projections disposed at regular intervals in a circumferential direction of the orbiting head plate,   a first insertion groove is formed between two adjacent first projections,   the second projection is configured to be inserted into the first insertion groove,   the second projection is one of a plurality of second projections disposed at regular intervals in a circumferential direction of the coupler,   a second insertion groove is formed between two adjacent second projections, wherein the first projection is configured to be inserted into the second insertion groove, and   the first projection inserted into the second insertion groove and the second projection inserted into the first insertion groove are configured to interfere with each other to block self-rotation of the orbiting scroll.   
     
     
         12 . The scroll compressor of  claim 11 , wherein
 a surface of the second projection contacting the first projection protrudes to form a curved surface when the first projection and the second projection interfere with each other, and   the first insertion groove is concave and formed between two adjacent first projections while forming a curved surface corresponding to a shape of the second projection.   
     
     
         13 . The scroll compressor of  claim 12 , wherein the first insertion groove is formed by connecting surfaces of two adjacent first projections facing each other in a curved surface shape corresponding to the shape of the second projection. 
     
     
         14 . The scroll compressor of  claim 10 , wherein
 the first projection and the orbiting scroll are integrally formed, and   the second projection and the second housing are integrally formed.   
     
     
         15 . The scroll compressor of  claim 8 , wherein
 the orbiting scroll comprises a suction port,   the fixed scroll comprises an exhaust port, and   the exhaust port is coupled to the discharge port.   
     
     
         16 . The scroll compressor of  claim 2 , wherein the housing is a first housing and the scroll compressor further comprises:
 a second housing disposed on the another side of the first housing in the length-wise direction of the first housing, wherein the second housing comprises the discharge port and is configured to cover the opening; and   a supporter disposed between the inlet port and the discharge port and fixed to one side of the first housing in the length-wise direction of the first housing,   wherein the supporter is placed at a rotation center of the rotor,   wherein the stator is fixed onto an outer surface of the supporter in a circumferential direction of the supporter, and   wherein the rotor is rotatably coupled to the supporter.   
     
     
         17 . The scroll compressor of  claim 16 , wherein
 one side of the supporter in a length-wise direction thereof is fixed to the first housing, and   the scroll compressor further comprises a main bearing configured to rotatably couple the rotation surface to the supporter.   
     
     
         18 . The scroll compressor of  claim 17 , wherein
 the main bearing is in contact with one surface of the rotation surface facing the supporter, and is fixed to the rotation surface, and   a fixation rib encircling an outer surface of the main bearing in a circumferential direction of the main bearing protrudes from one surface of the rotation surface facing the supporter.   
     
     
         19 . The scroll compressor of  claim 1 , wherein the orbiting scroll module comprises:
 an orbiting scroll comprising an orbiting head plate forming a flat surface parallel to the rotation surface;   an orbiting lap protruding from the orbiting head plate in a thickness-wise direction of the orbiting head plate; and   a back pressure hole configured to pass through the orbiting scroll and form a passage connecting the compression chamber and a gap between the rotation surface and the orbiting head plate.   
     
     
         20 . The scroll compressor of  claim 19 , wherein
 the back pressure hole comprises a through hole configured to pass through the orbiting head plate in the thickness-wise direction of the orbiting head plate, and   the orbiting scroll module further comprises a sealing member disposed between the orbiting head plate and the rotation surface, wherein the sealing member is configured to encircle the back pressure hole outside of the orbiting head plate in a diameter-wise direction of the orbiting head plate.