Vibration analysis and reduction for home refrigerator door using transfer path analysis

Abstract

In this study, we investigated the factor of large door vibration from the relationship between the compressor input force and the vibration mode of the refrigerator body by using transfer path analysis (TPA) to decrease the door vibration. At first, we measured the door vibration of a home refrigerator at various compressor rotational speeds to determine the rotation speed at which the door vibrates largely. Subsequently, the main contributor of the vibration was clarified using TPA. As the result, the door vibration was found to be increased by the door vibration mode and the input force along updown direction from the compressor. Accordingly, structural modification was carried out to decrease the door vibration considering the high contributing part. Finally, the vibration amplitude could be decreased about 90% at maximum.