Compressor

Abstract

An electric-motor refrigerant compressor, for compressing a fluid, having a compressor housing having a housing bottom, and having a compressor part mounted in the compressor housing for conveying the fluid from a low pressure-side inlet to a high pressure-side outlet. The separating device is introduced into the housing bottom and has a cylindrical separating chamber which is connected to the outlet, and a separator which is arranged coaxially in said separating chamber for separating lubricant which is contained in the fluid, and a high pressure chamber of the compressor housing is coupled in flow terms by means of a passage duct to the separating chamber. The passage duct may be made in an intermediate wall between the high pressure chamber and the separating chamber in such a way that said passage duct opens into the separating chamber offset radially and on the outer side of the separator.

1 . An electric-motor refrigerant compressor configured to compress a fluid comprising:
 a housing having a housing bottom;   a compressor part mounted in the housing and configured to deliver the fluid from a low-pressure-side inlet to a high-pressure-side outlet; and
 a separating device inserted into the housing bottom, wherein the separating device includes a cylindrical separating chamber connected to the high-pressure-side outlet and a separator, wherein the separator is arranged coaxially in the separating chamber and configured to separate lubricant contained in the fluid from the fluid, 
 wherein a high-pressure chamber of the housing is coupled in terms of flow to the separating chamber by a passage duct, 
 wherein the passage duct is formed by an intermediate wall disposed between the high-pressure chamber and the separating chamber in such a way that the passage duct opens into the separating chamber in a manner offset radially with respect to a central center line of the separator, and wherein 
 a clear width of the passage duct is less than or equal to a gap width of an annular gap formed between the separator and an inner wall of the separating chamber. 
   
     
     
         2 . The electric-motor refrigerant compressor of  claim 1 ,
 wherein   the passage duct is positioned in such a way that the fluid flows into the separating chamber and tangentially to the separator.   
     
     
         3 . The electric-motor refrigerant compressor of  claim 1 ,
 wherein the passage duct is offset radially with respect to the central center line of the separator by an offset, wherein a sum of the offset and of the clear width of the passage duct is less than or equal to a radius of the separating chamber.   
     
     
         4 . The electric-motor refrigerant compressor of  claim 1 ,
 wherein   the passage duct has an inner wall oriented parallel to an inflow direction of the fluid and/or perpendicularly to the housing bottom.   
     
     
         5 . The electric-motor refrigerant compressor of  claim 4 ,
 wherein   the separating chamber is oriented radially with respect to the housing bottom, wherein the passage duct is elongated and extends in a radial direction.   
     
     
         6 . The electric-motor refrigerant compressor of  claim 1 ,
 wherein the passage duct is a slotted aperture in the intermediate wall.   
     
     
         7 . The electric-motor refrigerant compressor of  claim 6 , wherein
 the slotted aperture has a substantially rectangular cross-sectional shape.   
     
     
         8 . The electric-motor refrigerant compressor of  claim 1 , wherein
 the separating chamber is formed between an inner wall of the housing bottom and the high-pressure chamber and wherein the separating chamber projects at least partially into the high-pressure chamber.   
     
     
         9 . The electric-motor refrigerant compressor of  claim 1 , wherein
 the housing bottom has an annular wall projecting axially beyond the separating chamber to form the high-pressure chamber, and   wherein the passage duct is arranged within the annular wall so that the passage duct is radially offset from the center line of the separator towards the outlet.   
     
     
         10 . The electric-motor refrigerant compressor of  claim 9 , wherein
 the compressor part lies along the annular wall.   
     
     
         11 . An electric refrigerant compressor comprising:
 a housing including
 a housing bottom, 
 an annular wall axially spaced apart from the housing bottom, and 
 an intermediate wall extending from the annular wall, wherein the intermediate wall, the housing bottom, and the annular wall form a separating chamber; 
   a compressor part disposed within the housing and configured to deliver a fluid from a low-pressure-side inlet to a high-pressure-side outlet, wherein the compressor part, the intermediate wall, and the annular wall form a high-pressure chamber; and   a separator defining a center line and disposed in the separating chamber, wherein the intermediate wall defines a passage duct, and wherein the separator and passage duct are arranged relative to one another so that the passage duct is oblique to and radially spaced apart from the center line of the separator.   
     
     
         12 . The electric refrigerant compressor of  claim 11 , wherein the passage duct includes a first inner wall, formed by the intermediate wall, and a second inner wall, formed by the annular wall, wherein the first inner wall is spaced apart from the second inner wall by a first distance, wherein an outer surface of the separator is spaced apart from the second inner wall by a second distance, wherein the first distance is less than or equal to the second distance. 
     
     
         13 . The electric refrigerant compressor of  claim 12 , wherein the first inner wall is spaced apart from the center line of the separator by a third distance and wherein a radius of the separator chamber is a fourth distance, wherein a sum of the first distance and the third distance is less than or equal to the fourth distance. 
     
     
         14 . The electric refrigerant compressor of  claim 11 , wherein the separating chamber extends at least partially into the high-pressure chamber. 
     
     
         15 . An electric refrigerant compressor comprising:
 a housing including
 a housing bottom, 
 an annular wall axially spaced apart from the housing bottom, and 
 an intermediate wall extending from the annular wall, wherein the intermediate wall, the housing bottom, and the annular wall form a separating chamber; 
   a compressor part disposed within the housing and configured to deliver a fluid from a low-pressure-side inlet to a high-pressure-side outlet, wherein the compressor part, the intermediate wall, and the annular wall form a high-pressure chamber; and   a separator defining a center line and disposed in the separating chamber, wherein the intermediate wall defines a passage duct, and wherein the passage duct includes a first inner wall, formed by the intermediate wall, and a second inner wall, formed by the annular wall, wherein the first inner wall has a first length and the second inner wall has a second length, less than the first length.   
     
     
         16 . The electric refrigerant compressor of  claim 15 , wherein the first inner wall is spaced apart from the second inner wall by a first distance, wherein an outer surface of the separator is spaced apart from the second inner wall by a second distance, wherein the first distance is less than or equal to the second distance. 
     
     
         17 . The electric refrigerant compressor of  claim 16 , wherein the first inner wall is spaced apart from the center line of the separator by a third distance and wherein a radius of the separator chamber is a fourth distance, wherein a sum of the first distance and the third distance is less than or equal to the fourth distance. 
     
     
         18 . The electric refrigerant compressor of  claim 15 , wherein the separating chamber extends between an outlet, formed by the bottom housing, and a lubricant reservoir, and wherein one end of the lubricant reservoir has a conical shape. 
     
     
         19 . The electric refrigerant compressor of  claim 15 , wherein the passage duct is elongated and extends in a radial direction. 
     
     
         20 . The electric refrigerant compressor of  claim 19 , wherein the passage duct has a rectangular cross-sectional shape.