1) The document describes NIDEA, a new intelligent defrost control device that optimizes defrost cycles for refrigeration systems. 2) Traditional defrost controls operate on fixed time intervals, but NIDEA uses sensors and algorithms to determine the optimal timing for defrost based on operating conditions. 3) A field test found that NIDEA performed defrosts less frequently than traditional controls, resulting in 24% lower total energy consumption and costs savings of over 20% per month.