Scroll compressor provided with a discharge port deflector

Abstract

The scroll compressor ( 1 ) includes a compressor shell ( 2 ) having a discharge outlet ( 4 ); a fixed scroll ( 7 ) arranged within the compressor shell ( 2 ) and including a fixed base plate ( 11 ) and a discharge passage ( 16 ) which is formed in the fixed base plate ( 11 ) and which is provided with a discharge port ( 17 ) emerging into a discharge pressure volume ( 18 ) at least partially defined by the compressor shell ( 2 ) and the fixed scroll ( 7 ); and a deflector ( 29 ) arranged in the discharge pressure volume ( 18 ), the deflector ( 29 ) covering the discharge port ( 17 ) and at least partially delimiting a discharge opening ( 31 ) facing the discharge outlet ( 4 ) of the compressor shell ( 2 ), the deflector ( 29 ) being configured to force a compressed refrigerant gas flow emerging from the discharge port ( 17 ) to smoothly shift from an axial direction to a radial direction and being configured to direct said compressed refrigerant gas flow towards the discharge outlet ( 4 ).

What is claimed is: 
     
         1 . A scroll compressor including:
 a compressor shell having a discharge outlet,   an orbiting scroll arranged within the compressor shell and comprising an orbiting base plate and an orbiting spiral wrap extending from the orbiting base plate,   a fixed scroll arranged within the compressor shell and comprising a fixed base plate and a fixed spiral wrap extending from the fixed base plate, the fixed and orbiting spiral wraps defining, with the fixed and orbiting base plates, compression chambers, the fixed scroll further comprising a discharge passage which is formed in the fixed base plate and which is provided with a discharge port emerging into a discharge pressure volume at least partially defined by the compressor shell and the fixed scroll, and   a deflector arranged in the discharge pressure volume, the deflector covering the discharge port and at least partially delimiting a discharge opening facing the discharge outlet of the compressor shell, the deflector being configured to force a compressed refrigerant gas flow emerging from the discharge port to shift from an axial direction to a radial direction and being configured to direct said compressed refrigerant gas flow towards the discharge outlet;   wherein the deflector has an elbow shape;   wherein the deflector is attached to the fixed base plate of the fixed scroll; and   wherein the deflector includes an upper wall part having an inner deflecting surface portion which is concave and curved, the inner deflecting surface portion being directed towards the discharge outlet.   
     
     
         2 . (canceled) 
     
     
         3 . (canceled) 
     
     
         4 . The scroll compressor according to  claim 1 , wherein the deflector includes a first end sealingly attached to the fixed base plate of the fixed scroll, and a second end at least partially delimiting the discharge opening. 
     
     
         5 . The scroll compressor according to  claim 1 , wherein the discharge opening emerges into the discharge pressure volume at a predetermined separating distance from the discharge outlet to allow communication between the compressed refrigerant gas flow and the discharge pressure volume. 
     
     
         6 . The scroll compressor according to  claim 1 , further including a discharge check valve assembly attached to the discharge outlet of the compressor shell and configured to prevent backflow of refrigerant from an external tubing of a refrigeration system into the discharge pressure volume, when the scroll compressor stops. 
     
     
         7 . The scroll compressor according to  claim 6 , wherein the discharge check valve assembly comprises a tubular valve housing having an inlet opening emerging into the discharge pressure volume and an outlet opening emerging outside the compressor shell and configured to be fluidly connected to the external tubing of a refrigeration system. 
     
     
         8 . The scroll compressor according to  claim 7 , wherein the discharge opening faces the inlet opening of the tubular valve housing and is located at a predetermined spacing distance from the inlet opening of the tubular valve housing. 
     
     
         9 . The scroll compressor according to  claim 7 , wherein a ratio between the cross-section of the inlet opening and the cross-section of the discharge opening is between 0.8 and 1.2, and for example between 0.9 and 1.1. 
     
     
         10 . The scroll compressor according to  claim 7 , wherein the discharge opening and the inlet opening are configured such that a majority of the compressed refrigerant gas leaving the discharge port of the fixed scroll is delivered directly into the inlet opening of the tubular valve housing. 
     
     
         11 . The scroll compressor according to  claim 1 , wherein the discharge passage includes a wall portion having a curved convex surface portion directed towards the discharge outlet. 
     
     
         12 . The scroll compressor according to  claim 11 , wherein the deflector and the curved convex surface portion of the discharge passage define a smooth surface structure. 
     
     
         13 . The scroll compressor according to  claim 2 , wherein the deflector includes a first end sealingly attached to the fixed base plate of the fixed scroll, and a second end at least partially delimiting the discharge opening. 
     
     
         14 . The scroll compressor according to  claim 3 , wherein the deflector includes a first end sealingly attached to the fixed base plate of the fixed scroll, and a second end at least partially delimiting the discharge opening. 
     
     
         15 . The scroll compressor according to  claim 2 , wherein the discharge opening emerges into the discharge pressure volume at a predetermined separating distance from the discharge outlet to allow communication between the compressed refrigerant gas flow and the discharge pressure volume. 
     
     
         16 . The scroll compressor according to  claim 3 , wherein the discharge opening emerges into the discharge pressure volume at a predetermined separating distance from the discharge outlet to allow communication between the compressed refrigerant gas flow and the discharge pressure volume. 
     
     
         17 . The scroll compressor according to  claim 4 , wherein the discharge opening emerges into the discharge pressure volume at a predetermined separating distance from the discharge outlet to allow communication between the compressed refrigerant gas flow and the discharge pressure volume. 
     
     
         18 . The scroll compressor according to  claim 2 , further including a discharge check valve assembly attached to the discharge outlet of the compressor shell and configured to prevent backflow of refrigerant from an external tubing of a refrigeration system into the discharge pressure volume, when the scroll compressor stops. 
     
     
         19 . The scroll compressor according to  claim 3 , further including a discharge check valve assembly attached to the discharge outlet of the compressor shell and configured to prevent backflow of refrigerant from an external tubing of a refrigeration system into the discharge pressure volume, when the scroll compressor stops. 
     
     
         20 . The scroll compressor according to  claim 4 , further including a discharge check valve assembly attached to the discharge outlet of the compressor shell and configured to prevent backflow of refrigerant from an external tubing of a refrigeration system into the discharge pressure volume, when the scroll compressor stops.