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임효준(Hyo Joon Lim),이주경(Ju Kyoung Lee),황준현(Jun Hyeon Hwang),이경창(Kyung Chang Lee),이석(Suk Lee) Korean Society for Precision Engineering 2016 한국정밀공학회지 Vol.33 No.6
Unlike household refrigerators, commercial refrigerators are composed of separate indoor and outdoor units. The outdoor unit of most commercial refrigerators is designed to run at a fixed speed, which results in low energy efficiency and loud fan noise. Moreover, it cannot respond flexibly to changing thermal load in the indoor unit. Inverter type outdoor units can address such problems through speed changes based on information obtained from the indoor unit. However, using two units from different manufacturers is often not a viable solution. If condition changes in the indoor unit can be detected without communication between the two units, it is possible to adjust the speed of the outdoor unit. This paper attempts to analyze the signal from the outdoor unit when the condition of the indoor unit changes by varying the thermal load.