});


Results 1 to 4 of 4
  1. #1
    Join Date
    Mar 2016
    Location
    IRAN
    Posts
    172
    Rep Power
    4

    flooded evaporators and oil return



    Dear Friends,

    Do you have any document that describes how oil comes back to crankcase of compressor from "flooded evaporators" ?

    Sincerely yours.



  2. #2
    Join Date
    Aug 2006
    Location
    England
    Posts
    475
    Rep Power
    16

    Re: flooded evaporators and oil return

    Hi normally you have oil separator

  3. #3
    Join Date
    Aug 2014
    Location
    UK
    Age
    70
    Posts
    455
    Rep Power
    19

    Re: flooded evaporators and oil return

    You need a rectifier vessel with either an electric heater or the warm liquid line in a coil in the rectifier. Several liquid/ oil sampling points are taken from the evaporator ( these sampling points are towards the top of the liquid level in the evaporator) . The oil/ liquid sample is drained into the rectifier vessel , the heat from the liquid line or heater causes the liquid in the oil to evaporate and the vapour is vented back to the compressor suction. The warm oil drops to the bottom of the rectifier vessel and via a float valve is drained back into the compressor sump when required . The sampling points normally needle valves are adjusted to control how much oil/liquid is sampled from the different levels on the evaporator.
    It is important a safety device is installed on the rectifier vessel such as a thermostat so if the heater fails and the liquid isnít boiled off this prevents liquid refrigerant entering the compressor crankcase causing loss of oil pressure due to liquid/ oil dilution
    Last edited by Glenn Moore; 09-12-2018 at 08:34 PM. Reason: Additional info

  4. #4
    Join Date
    Mar 2016
    Location
    IRAN
    Posts
    172
    Rep Power
    4

    Re: flooded evaporators and oil return

    Quote Originally Posted by Glenn Moore View Post
    You need a rectifier vessel with either an electric heater or the warm liquid line in a coil in the rectifier. Several liquid/ oil sampling points are taken from the evaporator ( these sampling points are towards the top of the liquid level in the evaporator) . The oil/ liquid sample is drained into the rectifier vessel , the heat from the liquid line or heater causes the liquid in the oil to evaporate and the vapour is vented back to the compressor suction. The warm oil drops to the bottom of the rectifier vessel and via a float valve is drained back into the compressor sump when required . The sampling points normally needle valves are adjusted to control how much oil/liquid is sampled from the different levels on the evaporator.
    It is important a safety device is installed on the rectifier vessel such as a thermostat so if the heater fails and the liquid isn’t boiled off this prevents liquid refrigerant entering the compressor crankcase causing loss of oil pressure due to liquid/ oil dilution
    Thanks Glenn Moore

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •