Refrigerant Compressor Unit

Abstract

In order to improve a refrigerant compressor of the type mentioned in the introduction such that it is ensured that, even in the event of a tilt along a longitudinal direction of the refrigerant compressor unit relative to a horizontal course of the longitudinal direction, lubricant can reliably be drawn off by suction out of the lubricant sump, in order to prevent excessive accumulation of lubricant in the lubricant sump, it is proposed that there should be provided on the bottom side of the motor compartment a receiving point that takes a form such that the receiving point supplies lubricant from the lubricant sump to the suction-removal unit.

1 . A refrigerant compressor unit, comprising a piston compressor, which is driven by a drive motor, and an overall housing having a housing body that forms a drive housing portion with a drive compartment for the piston compressor and forms a motor housing portion with a motor compartment for receiving the drive motor, wherein refrigerant that is supplied to the piston compressor flows through the motor compartment such that there is formed in the motor compartment, on the bottom side, a lubricant sump out of which lubricant is drawn off by suction by a suction-removal unit and is transferred to a lubricant bath in the motor compartment, wherein there is provided on the bottom side of the motor compartment a receiving point that takes a form such that, in particular in the event of tilting within a tilting tolerance range by the refrigerant compressor unit relative to a starting position, the receiving point receives lubricant from the lubricant sump and supplies it to the suction-removal unit. 
     
     
         2 . The refrigerant compressor unit as claimed in  claim 1 , wherein the receiving point forms a well in relation to the area surrounding it on the bottom side. 
     
     
         3 . The refrigerant compressor unit as claimed in  claim 1 , wherein the receiving point is arranged in the motor compartment such that, in the event of tilting of the refrigerant compressor unit such that an axis of rotation of a compressor shaft is within a tilting tolerance range of ±15° relative to a horizontal orientation in the starting position, the lubricant sump extends as far as the receiving point and lubricant from the lubricant sump enters the receiving point. 
     
     
         4 . The refrigerant compressor unit as claimed in  claim 1 , wherein the receiving point is arranged in a bottom region of the motor compartment that runs from an intermediate wall, which separates the motor compartment from the drive compartment, to below a region of the stator facing the intermediate wall, and in particular runs for at most half of the extent of the stator in the longitudinal direction. 
     
     
         5 . The refrigerant compressor unit as claimed in  claim 1 , wherein the receiving point lies between the intermediate wall and a stator lamination body that comprises pole shoes of the stator. 
     
     
         6 . The refrigerant compressor unit as claimed in  claim 1 , wherein the receiving point is arranged on the bottom side of the motor compartment, as seen in the direction of gravity below winding heads of the stator that face the intermediate wall. 
     
     
         7 . The refrigerant compressor unit as claimed in  claim 1 , wherein the receiving point is formed in a recess relative to a bottom face of the motor compartment. 
     
     
         8 . The refrigerant compressor unit as claimed in  claim 7 , wherein the receiving point is formed on a bottom body of the motor housing portion. 
     
     
         9 . The refrigerant compressor unit as claimed in  claim 8 , wherein the receiving point is shaped into the bottom body. 
     
     
         10 . The refrigerant compressor unit as claimed in  claim 1 , wherein, for the purpose of forming the receiving point, the bottom body is provided with a shape that runs in the direction of a support surface of the housing body. 
     
     
         11 . The refrigerant compressor unit as claimed in  claim 1 , wherein the receiving point lies in a central region of the motor compartment on the bottom side, as seen in a direction transverse to the longitudinal direction of the overall housing. 
     
     
         12 . The refrigerant compressor unit as claimed in  claim 1 , wherein, in the direction of a housing cover that closes off the motor compartment, the lubricant sump is delimited by a closing-off wall arranged between the stator and the housing cover. 
     
     
         13 . The refrigerant compressor unit as claimed in  claim 1 , wherein an extent of the lubricant sump in the direction of a housing cover that closes off the motor compartment is delimited by a lubricant displacement body arranged between the stator and the housing cover. 
     
     
         14 . The refrigerant compressor unit as claimed in  claim 13 , wherein the lubricant displacement body is held against the housing cover. 
     
     
         15 . The refrigerant compressor unit as claimed in  claim 14 , wherein the lubricant displacement body is integrally formed on the housing cover. 
     
     
         16 . The refrigerant compressor unit as claimed in  claim 12 , wherein the lubricant displacement body forms the closing-off wall.