PATENT : defrosting process without efficiency losses in an ejector refrigeration system and in an expander refrigeration system

**NOTICE: This version contains errors in the data/text. Please refer to the latest version for the correct information The invention improves the DENSO ejector cycle system by enabling defrosting of one evaporator section at a time without efficiency losses. It adopts a warm-liquid-subcooling defrosting method applied to a selected section of a parallel multi-section evaporator unit (e.g., multiple parallel coils) particularly in an Air Source Heat Pump (ASHP). The ejector allows the compressor suction pressure to correspond to the higher evaporating pressure of the remaining non-defrosting sections, which operate at different evaporation pressures due to unequal frost accumulation. In future implementations, the ejector could be substituited with an expander.