FLUID DEFROST SYSTEM AND METHOD FOR SECONDARY REFRIGERATION SYSTEMS

摘要

A fluid defrost system and method for defrosting the cooling coil (CC) of a product fixture (PF) normally cooled by circulating a cold secondary liquid coolant in a cooling loop (RS) refrigerated by a primary vapor compression system (VC) having compressor (110), condenser (111) and evaporator (112) means; the defrost system comprising a heat exchanger (130) associated with the condenser means (111) for warming secondary liquid coolant in a heating loop, and means for controlling the circulation of warm liquid coolant through the heat exchanger (130) and cooling coil (16).