Refrigerant compressor

Abstract

A refrigerant compressor, comprising a hermetically sealed compressor housing ( 1 ), in whose interior ( 8 ) a piston-cylinder unit ( 4 ) compressing a refrigerant operates, which sucks in refrigerant from outside ( 9 ) the compressor housing ( 1 ) via a suction pipe ( 2 ) and expels the refrigerant under compression via a pressure section ( 3, 6 ), formed from a pressure pipe ( 3 ) manufactured from plastic and a connection pipe ( 6 ) manufactured from metal in the direction of a condenser situated outside ( 9 ) the compressor housing ( 1 ). In order to enable a reliable sealing connection between the pressure pipe ( 3 ) and the connection pipe ( 6 ), it is provided that the pressure pipe ( 3 ) is connected to form a seal to the connection pipe ( 6 ) using a sleeve-shaped connector ( 5 ), which is manufactured from plastic and is situated between the pressure pipe ( 3 ) and the connection pipe ( 6 ), the connection pipe ( 6 ) having an at least sectionally constricted end section ( 6 c ), facing toward the pressure pipe ( 3 ), which secures the connector ( 5 ) situated inside the connection pipe ( 6 ) in its axial location.

1 . A refrigerant compressor, comprising a hermetically sealed compressor housing ( 1 ), in whose interior ( 8 ) a piston-cylinder unit ( 4 ) compressing a refrigerant operates, which sucks in refrigerant from outside ( 9 ) the compressor housing ( 1 ) via a suction pipe ( 2 ) and expels the refrigerant under compression via a pressure section ( 3 ,  6 ), formed from a pressure pipe ( 3 ) manufactured from plastic and a connection pipe ( 6 ) manufactured from metal in the direction of a condenser situated outside ( 9 ) the compressor housing ( 1 ), wherein the pressure pipe ( 3 ) is connected to form a seal to the connection pipe ( 6 ) using a sleeve-shaped connector ( 5 ), which is manufactured from plastic and is situated between the pressure pipe ( 3 ) and the connection pipe ( 6 ), the connection pipe ( 6 ) having an at least sectionally constricted end section ( 6   c ), facing toward the pressure pipe ( 3 ), which secures the connector ( 5 ) situated inside the connection pipe ( 6 ) in its axial location. 
   
   
       2 . The refrigerant compressor according to  claim 1 , wherein a sealing connection between the connector ( 5 ) and the connection pipe ( 6 ) is produced by a seal element ( 7 ) situated between the connector ( 5 ) and the connection pipe ( 6 ). 
   
   
       3 . The refrigerant compressor according to  claim 3 , wherein the seal element ( 7 ) is an O-ring, which is preferably held in a groove ( 13 ) provided on an outer side ( 5   b ) of the connector ( 5 ). 
   
   
       4 . The refrigerant compressor according to  claim 1 , wherein a flow cross-section ( 11 ) of the connector ( 5 ), which adjoins an end area ( 3   c ) of the pressure pipe ( 3 ) and is delimited by an inner surface ( 5   a,    5   a ′), is greater than or equal to a flow cross-section ( 10 ) of the pressure pipe ( 3 ), which is delimited by an inner surface ( 3   a ). 
   
   
       5 . The refrigerant compressor according to  claim 1 , wherein an outer side ( 3   b ) of the pressure pipe ( 3 ) is jacketed by the connector ( 5 ) to form a seal. 
   
   
       6 . The refrigerant compressor according to  claim 4 , wherein the inner surface ( 5   a,    5   a ′) of the connector ( 5 ) is implemented as stepped, a first inner surface section ( 5   a ), which jackets the pressure pipe ( 3 ), and a second inner surface section ( 5   a ′), which adjoins the end area ( 3   c ) of the pressure pipe ( 3 ), preferably a front side of the pressure pipe ( 3 ), and is essentially aligned with an inner surface ( 3   a ) of the pressure pipe ( 3 ) or—viewed relative to the pipe axis—lies outside the pressure pipe inner surface ( 3   a ), of the connector ( 5 ) are provided. 
   
   
       7 . The refrigerant compressor according to  claim 1 , wherein the connector ( 5 ) is connected to the pressure pipe ( 3 ) by gluing, welding, or extrusion coating. 
   
   
       8 . The refrigerant compressor according to  claim 1 , wherein the connector ( 5 ) is fastened on the pressure pipe ( 3 ) using laser welding, at least the section of the connector ( 5 ) adjoining the pressure pipe ( 3 ) being transparent at least to infrared wavelengths in the range between 800 and 960 nm. 
   
   
       9 . The refrigerant compressor according to  claim 1 , wherein the connector ( 5 ) is pressed into the connection pipe ( 6 ). 
   
   
       10 . The refrigerant compressor according to  claim 1 , wherein an outer side ( 5   b ) of the connector ( 5 ) has a complementary geometry which is prepared for crimping with the connection pipe ( 6 ), preferably in the form of a concave recess ( 14 ). 
   
   
       11 . The refrigerant compressor according to  claim 1 , wherein the connector ( 5 ) is produced from an elastomeric plastic. 
   
   
       12 . The refrigerant compressor according to  claim 1 , wherein the connection pipe ( 6 ) is fastened, preferably welded, to a wall of the compressor housing ( 1 ) at the height of the end section ( 3   c ) of the pressure pipe ( 3 ) held in the assembly location in the connection pipe ( 6 ) and/or in the connector ( 5 ).