On the other hand, for a scroll compressor with certain
injection ports, the injected refrigerant flow rate will decrease
with the decrease of the injection pressure, which leads to the
decrease of the pressure difference for injection. If the injected
refrigerant mass flow rate is too small (Fig. 7(a)), the
refrigerant in the main loop cannot be subcooled to the
saturation temperature of the injection pressure when all of
the refrigerant in the injection loop has been completely
outlet of IHX is still in two-phase area, which means the
injected refrigerant is not utilized fully.