SYSTEM AND METHOD OF TRANSFERRING REFRIGERANT WITH A DISCHARGE PRESSURE

Systems and methods are described herein to use a discharge pressure of a compressor to drive refrigerant in a refrigeration system. Particularly, systems and methods are described herein to help recover liquid refrigerant from a liquid refrigerant section and/or a condenser coil to be used in a heating/defrost mode in a transport refrigerant unit (TRU). The liquid refrigerant can be recovered by directing the discharge refrigerant of the compressor to a liquid refrigerant section, which may include a receiver tank, a dryer and associated refrigerant lines, and/or a condenser coil. The discharge pressure of the discharge port can help drive refrigerant trapped in the liquid refrigerant section and/or the condenser coil into the heating/defrost branch of the TRU, which may include an evaporator coil, an accumulator tank and/or associated refrigerant lines.