Compressor, in particular refrigerant compressor, refrigeration machine, and method for producing a compressor

Abstract

The present disclosure relates to a compressor having a low-pressure region and a high-pressure region, wherein a lubricant is provided in the low-pressure region in order to lubricate the compressor. A fluid is conveyed from the low-pressure region into the high-pressure region and compressed, wherein a portion of the lubricant with the fluid from the low-pressure region reaches the high-pressure region, and wherein a lubricant separator for separating the lubricant from the fluid/lubricant mixture in the high-pressure region is provided. A lubricant return channel for transporting the separated lubricant from the high-pressure region into the low-pressure region is provided.

1 . A compressor comprising:
 a low-pressure region;   a high-pressure region;   a lubricant provided in the low-pressure region configured to lubricate the compressor;   a fluid configured to be conveyed from the low-pressure region into the high-pressure region and compressed, wherein a portion of the lubricant with the fluid from the low-pressure region is configured to reach the high-pressure region;   a lubricant separator for separating the lubricant from the fluid in the high-pressure region; and   a lubricant return channel for transporting the separated lubricant from the high-pressure region into the low-pressure region wherein the lubricant return channel includes a fluid diode.   
     
     
         2 . The compressor of  claim 1 , wherein the lubricant return channel includes a heart-shaped or offset-heart-shaped inner wall in order to form the fluid diode. 
     
     
         3 . The compressor of  claim 1 , wherein the lubricant return channel is introduced into a metal sheet. 
     
     
         4 . The compressor of  claim 1 , wherein the lubricant return channel is shaped in a semi-circular manner. 
     
     
         5 . The compressor of  claim 1 , wherein the lubricant return channel is formed in a planar partition face in a housing, a sealing face, and/or in a seal of the compressor. 
     
     
         6 . The compressor of  claim 1 , wherein the fluid (F) is a refrigerant, in particular supercritical CO2. 
     
     
         7 . The compressor of  claim 1 , wherein the lubricant (S) is oil. 
     
     
         8 . The compressor of  claim 1 , wherein a configuration of an inner wall of the lubricant return channel, is produced by means of punching, etching or erosion. 
     
     
         9 . The compressor of  claim 1 , wherein the lubricant return channel includes the fluid diode ( 31 ) as a separate component. 
     
     
         10 . A refrigeration machine comprising: a compressor, a gas cooler, an expansion valve and an evaporator, which are fluidically connected to each other, wherein the compressor includes:
 a low-pressure region;   a high-pressure region;   a lubricant provided in the low-pressure region configured to lubricate the compressor;   a fluid configured to be conveyed from the low-pressure region into the high-pressure region and compressed, wherein a portion of the lubricant with the fluid from the low-pressure region is configured to reach the high-pressure region;   a lubricant separator for separating the lubricant from the fluid in the high-pressure region; and   a lubricant return channel for transporting the separated lubricant from the high-pressure region into the low-pressure region wherein the lubricant return channel includes a fluid diode.   
     
     
         11 . A method for producing a compressor:
 punching, etching or eroding an inner wall of a lubricant return channel of the compressor comprising:
 a low-pressure region; 
 a high-pressure region; 
 a lubricant provided in the low-pressure region configured to lubricate the compressor; 
 a fluid configured to be conveyed from the low-pressure region into the high-pressure region and compressed, wherein a portion of the lubricant with the fluid from the low-pressure region is configured to reach the high-pressure region; 
 a lubricant separator for separating the lubricant from the fluid in the high-pressure region. 
   
     
     
         12 . The compressor of  claim 1 , wherein the lubricant return channel is at least partially in the form of a fluid diode.