Refrigerant compressor arrangement

Abstract

The invention concerns a refrigerant compressor arrangement ( 1 ) with a compressor block ( 21 ) comprising a compressor unit ( 9 ) with a cylinder formed in the compressor block, and with a motor ( 8 ) having a stator ( 12 ) and a rotor ( 13 ), the rotor being unrotatably connected to a drive shaft ( 31 ) driving the compressor unit ( 9 ), the drive shaft ( 31 ) being supported in a bearing section ( 32 ) of the compressor block ( 21 ). It is endeavoured to make the refrigerant compressor arrangement with a smaller total height. For this purpose, the bearing section ( 32 ) penetrates an active area of the stator ( 12 ) and that the rotor ( 13 ) and the drive shaft ( 31 ) are connected to each other outside the active area on the side of the rotor ( 13 ) facing away from the compressor unit ( 9 ).

1 . A refrigerant compressor arrangement with a compressor block comprising a compressor unit with a cylinder formed in the compressor block, and with a motor having a stator and a rotor, the rotor being unrotatably connected to a drive shaft driving the compressor unit, the drive shaft being supported in a bearing section of the compressor block, wherein the bearing section penetrates an active area of the stator and that the rotor and the drive shaft are connected to each other outside the active area on the side of the rotor facing away from the compressor unit. 
     
     
         2 . The arrangement according to  claim 1 , wherein the motor is a permanent magnet energized synchronous motor with inner rotor. 
     
     
         3 . The arrangement according to  claim 2 , wherein the rotor has a support part, on which several permanent magnets are located. 
     
     
         4 . The arrangement according to  claim 3 , wherein the rotor is connected to the drive shaft via the support part. 
     
     
         5 . The arrangement according to  claim 3 , wherein the support part is adjacent to the bottom of the bearing section. 
     
     
         6 . The arrangement according to  claim 3 , wherein a fixing section, with which the support part is fixed on the drive shaft, is shorter in the axial direction than a magnet section, on which the permanent magnets are located. 
     
     
         7 . The arrangement according to  claim 1 , wherein an oil pump opening at the lower end of the drive shaft is in connection with a bore in the drive shaft, said bore being inclined in relation to the rotation axis of the drive shaft. 
     
     
         8 . The arrangement according to  claim 7 , wherein the oil pump opening is located in an attachment, which is adjacent to the lower end of the drive shaft. 
     
     
         9 . The arrangement according to  claim 8 , wherein the attachment forms part of the support part. 
     
     
         10 . The according to  claim 8 , wherein the attachment is made in one piece with the support element. 
     
     
         11 . The arrangement according to  claim 10 , wherein the support element and the attachment are made as a common sintered part. 
     
     
         12 . The arrangement according to  claim 7 , wherein the bore is connected to a helical groove on the outside of the drive shaft via a radial channel, which is covered by the bearing section at the area of the lower end of the bearing section. 
     
     
         13 . The arrangement according to  claim 7 , wherein a crank pin is located at the upper end of the drive shaft, eccentrically to the drive shaft, said crank pin surrounding an upwardly open hollow, which is connected to the bore. 
     
     
         14 . The arrangement according to  claim 1 , wherein the lower part of the bearing section has a reduced outer diameter.