Refrigerant compressor

Abstract

Refrigerant compressor, comprising an electric drive unit ( 2 ), a cylinder housing ( 1 ), a crankshaft ( 11 ) which may be driven by the electric drive unit, wherein the cylinder housing ( 1 ) has the main bearing for the crankshaft ( 11 ), and a piston ( 12 ), driven by the crankshaft ( 11 ) and guided in the cylinder housing ( 1 ), which compresses the refrigerant. To allow the main bearing length to be dimensioned as large as possible, it is provided that at least one height compensation element ( 26 ) is situated between the cylinder housing ( 1 ) and the electric drive unit ( 2 ) in order to keep an overall height of the cylinder housing and the respective drive unit practically identical within a compressor family having drive units of different heights.

1 : Refrigerant compressor, comprising an electric drive unit ( 2 ), a cylinder housing ( 1 ), a crankshaft ( 11 ) which may be driven by the electric drive unit, wherein the cylinder housing ( 1 ) comprises the main bearing for the crankshaft ( 11 ), and a piston ( 12 ), driven by the crankshaft ( 11 ) and guided in the cylinder housing ( 1 ), which compresses the refrigerant, wherein at least one height compensation element ( 26 ) is situated between the cylinder housing ( 1 ) and the electric drive unit ( 2 ), in order to keep an overall height of the cylinder housing and the respective drive unit practically identical within a compressor family having drive units of different heights. 
     
     
         2 : Refrigerant compressor according to  claim 1 , wherein the cylinder housing ( 1 ) has at least one contact flange ( 5 ) which is mounted on at least one corresponding contact surface of the electric drive unit ( 2 ), and the at least one height compensation element ( 26 ) is situated between the contact flange ( 5 ) and the contact surface. 
     
     
         3 : Refrigerant compressor according to  claim 2 , wherein the electric drive unit is a single phase asynchronous motor, and the contact surface is the core stack ( 2 ) of the stator. 
     
     
         4 : Refrigerant compressor according to  claim 3 , wherein the contact flange ( 5 ), height compensation element ( 26 ), and contact surface are screwed together. 
     
     
         5 : Refrigerant compressor according to  claim 1 , wherein the height compensation element ( 26 ) has a borehole or recess for accommodating a fastening element, preferably a screw. 
     
     
         6 : Compressor family having refrigerant compressors of different refrigerating capacities, wherein each refrigerant compressor includes an electric drive unit ( 2 ), a cylinder housing ( 1 ), a crankshaft ( 11 ) which may be driven by the electric drive unit ( 2 ), wherein the cylinder housing ( 1 ) has the main bearing for the crankshaft ( 11 ), and a piston ( 12 ), driven by the crankshaft ( 11 ) and guided in the cylinder housing ( 1 ), which compresses the refrigerant, wherein the electric drive unit ( 2 ) of each refrigerant compressor in the compressor family has a different overall height (H overall ), composed of the height of the electric drive unit (H e ) and the height of the cylinder housing (H z ), depending on the refrigerating capacity, wherein at least one height compensation element ( 26 ) is situated between the electric drive unit ( 2 ) and the cylinder housing ( 1 ) of each refrigerant compressor in the compressor family. 
     
     
         7 : Compressor family according to  claim 6 , wherein the section defining the height (H e ) of the electric drive unit ( 2 ) is the height of the core stack ( 2 ) of the stator.