Abstract
A drum-type washer dryer with a drum 600mm in diameter which was the largest in the domestic drum-type washer was developed. Using the large drum, both performance in washing and quality in drying are improved. However, during spin cycle, the large drum generates huge centrifugal force and large vibration. This report presents three vibration reduction technologies. First, we optimized parameters of suspensions using Taguchi Methods on computer simulation. Second, 2-stage oil damper which can change its characteristic by vibration amplitude was developed. Third, two vibration sensors were installed to detect vibration modes, and using those data spin speed was controlled. Applying those technologies, a low-vibration drum-type washer dryer was developed.
