Refrigeration oil replacement device of a totally hermetic compressor in a refrigeration recycling system

Abstract

A refrigeration oil replacement device of a totally hermetic compressor in a refrigeration recycling system is disclosed. The totally hermetic compressor forms a hermetic chamber with a high-pressure end and a low-pressure end, and includes an input pipeline connected from the low-pressure end to the hermetic chamber, and an output pipeline connected from the high-pressure end to the hermetic chamber. The refrigeration oil replacement device has a gas charging pipeline connected to the hermetic chamber for filling in gas, and a drainage pipeline connected to the hermetic chamber. When gas is pumped in from the gas charging pipeline, the deteriorated refrigeration oil inside the hermetic chamber will be discharged from the drainage pipeline under the pressure.

We claim: 
     
         1 . A refrigeration oil replacement device of a totally hermetic comprising:
 a refrigeration recycling system;   the totally hermetic compressor forms a hermetic chamber with a low-pressure end and a high-pressure end, and comprises an input pipeline connected from the low-pressure end to the hermetic chamber, and an output pipeline connected from the high-pressure end to the hermetic chamber;   the output pipeline comprises a compression working section extending into the hermetic chamber; the refrigeration oil replacement device comprises:
 a gas charging pipeline, connected to the hermetic chamber, for filling gas into the hermetic chamber; and 
 a drainage pipeline, connected to the hermetic chamber; 
   when gas is pumped in from the gas charging pipeline, the refrigeration oil inside the hermetic chamber will flow into the drainage pipeline under the pressure.   
     
     
         2 . The structure defined in  claim 1 , which also comprises an input valve configured in the input pipeline, and an output valve configured in the output pipeline. 
     
     
         3 . The structure defined in  claim 1 , which also comprises an on-off valve configured in the drainage pipeline, to close or open the drainage pipeline; when it is open, the refrigeration oil can be discharged from the drainage pipeline. 
     
     
         4 . The structure defined in  claim 1 , which also comprises a pressure pump connected to the gas charging pipeline; when shutting off the input valve and the output valve, the pressure valve will generate a pressure source to push the refrigeration oil inside the hermetic chamber to flow into the drainage pipeline. 
     
     
         5 . The structure defined in  claim 1 , wherein the drainage pipeline comprises a transparent window. 
     
     
         6 . The structure defined in  claim 1 , which also comprises a working valve configured inside the gas charging pipeline. 
     
     
         7 . The structure defined in  claim 4 , wherein the pressure pump generates the pressure source by inputting nitrogen gas into the gas charging pipeline. 
     
     
         8 . The structure defined in  claim 3 , which also comprises an extraction mechanism connected to the drainage pipeline to extract the refrigeration oil. 
     
     
         9 . The structure defined in  claim 8 , wherein the extraction mechanism is connected on the relative upstream of the on-off valve.