Lubricant receptacle for a coolant compressor and coolant compressor

Abstract

The invention relates to a lubricant receptacle (1) for vertically conveying lubricant by means of a crankshaft (2) of a coolant compressor (3), said lubricant receptacle (1) comprising at least one rotationally symmetrical, sleeve-type receiving section (4) for receiving lubricant, wherein the longitudinal axis (8) of the receiving section (4) can be arranged coaxially with a longitudinal axis of the crankshaft (2) of the coolant compressor (3), and comprising a securing section (16) connected to the receiving section (4) in order to secure the lubricant receptacle (1) on the crankshaft (2), as well as comprising at least one end region (5) connected to the receiving section (4) which closes the the receiving section (4) apart from an inlet opening (6), wherein the inlet opening (6) permits the entry of lubricant from a lubricant sump (7) of the coolant compressor (3) into the receiving section (4) of the lubricant receptacle (1) protruding at least partially into the lubricant sump (7), wherein the inlet opening (6) is arranged in the end region (5) around the longitudinal axis (8), wherein, when viewed in the direction of the longitudinal axis, the inlet opening (6) either has a circular peripheral shape and a mid-point of the inlet opening is offset in relation to the longitudinal axis (8), or the inlet opening (6) has a non-circular peripheral shape when viewed in the direction of the longitudinal axis.

1 . A lubricant receptacle for vertical conveyance of lubricant by means of a crankshaft of a refrigerant compressor, the lubricant receptacle comprising
 at least one rotationally symmetrical sleeve-shaped receiving portion for receiving lubricant, wherein the longitudinal axis of the receiving portion can be arranged coaxially with a longitudinal axis of the crankshaft of the refrigerant compressor ( 3 ),   a fastening portion adjoining the receiving portion in order to fasten the lubricant receptacle to the crankshaft, and   at least one end region adjoining the receiving portion and closing off the receiving portion apart from an inlet opening, wherein the inlet opening enables the entry of lubricant from a lubricant sump of the refrigerant compressor into the receiving portion of the lubricant receptacle, said lubricant receptacle protruding at least in portions into the lubricant sump, wherein the inlet opening is arranged in the end region surrounding the longitudinal axis,   
       wherein the inlet opening, as viewed in the direction of the longitudinal axis, has either a circular peripheral shape and a center of the inlet opening is offset from the longitudinal axis, or the inlet opening has a non-circular peripheral shape as viewed in the direction of the longitudinal axis. 
     
     
         2 . The lubricant receptacle according to  claim 1 , wherein the inlet opening, viewed in the direction of the longitudinal axis, has the shape of an ellipse. 
     
     
         3 . The lubricant receptacle according to  claim 1 , wherein the inlet opening has the shape of an elongated hole. 
     
     
         4 . The lubricant receptacle according to  claim 3 , wherein the elongated hole is delimited in a semicircular shape at both ends and the long side of the elongated hole is longer than the radius of the semicircular delimitations. 
     
     
         5 . The lubricant receptacle according to  claim 4 , wherein the length of the long side of the elongated hole is between the value of the radius of the semicircular delimitations and twice the value thereof. 
     
     
         6 . The lubricant receptacle according to  claim 1 , wherein the size of the inlet opening is between 5 and 30 percent of the clear cross-sectional area of the receiving portion. 
     
     
         7 . A system comprising a crankshaft of a refrigerant compressor and a lubricant receptacle according to  claim 1 , wherein the lubricant receptacle is arranged coaxially with the crankshaft and is rotationally fixedly connected to the crankshaft. 
     
     
         8 . A refrigerant compressor having
 a hermetically sealable compressor housing,   an electrical drive unit arranged in a housing interior of the compressor housing and comprising a rotor and a stator,   a crankshaft rotationally fixedly connected to the rotor, and   a piston-cylinder unit which is arranged in the housing interior and comprises a piston movably mounted in a cylinder of the piston-cylinder unit, which piston can be driven by the crankshaft to compress refrigerant,   
       wherein the refrigerant compressor has a lubricant receptacle according to  claim 1  in order to convey lubricant from a lubricant sump formed in a bottom region of the compression housing via the crankshaft to the piston-cylinder unit, wherein the lubricant receptacle is rotationally fixedly connected to the crankshaft. 
     
     
         9 . The refrigerant compressor according to  claim 8 , wherein the end region of the lubricant receptacle protrudes at least in portions into the lubricant sump such that the inlet opening is arranged within the lubricant sump in order to enable entry of lubricant from the lubricant sump into the receiving portion of the lubricant receptacle. 
     
     
         10 . The refrigerant compressor according to  claim 8 , wherein the lubricant receptacle is fastened by means of the fastening portion to an end portion of the crankshaft remote from the piston-cylinder unit and/or to the rotor. 
     
     
         11 . The lubricant receptacle according to  claim 6 , wherein the between 5 and 30 percent of the clear cross-sectional area is between 10 and 25 percent. 
     
     
         12 . The lubricant receptacle according to  claim 11 , wherein the between 10 and 25 percent is between 15 and 20 percent.