Laundry Drum Unbalance Control for Quieter Spin Cycles

The patent applies dynamics by making the drum speed variable rather than constant. The control method dynamically adjusts the rotation speed based on detected unbalance conditions, switching between high speed (for water removal efficiency) and low speed (for reduced noise and vibration when unbalance is detected). This resolves the contradiction by allowing the system to operate at high speed when balanced and reduce speed when unbalance occurs.

The patent implements feedback by continuously monitoring vibration or acceleration signals during the spinning cycle and using this information to control drum speed. The control unit receives detection signals from sensors and adjusts the motor speed accordingly, creating a closed-loop system that automatically responds to unbalance conditions and minimizes noise and vibration while maintaining water removal efficiency.

The patent uses dynamics by transitioning from fixed high speed to variable speed operation. The drum speed is dynamically adjusted based on real-time balance detection, allowing the system to maintain high spinning performance when balanced and automatically reduce speed when unbalance is detected, thus preventing amplification of unbalance effects.

The patent applies feedback control where vibration sensors continuously monitor drum balance status and feed this information to the control unit. The control unit then adjusts motor speed in response to unbalance detection, creating a self-regulating system that maintains spinning performance while preventing unbalance amplification through automatic speed reduction when needed.

The patent applies periodic action by performing unbalance detection at specific intervals or at critical moments during the spinning cycle rather than continuously. The control unit detects unbalance conditions at predetermined timing points, which is sufficient to maintain measurement precision while significantly reducing energy consumption compared to continuous monitoring.

The patent implements self-service by using the drum's own rotation and existing vibration sensors to perform self-diagnosis of unbalance conditions. The system utilizes naturally occurring vibration signals during normal operation to detect unbalance, eliminating the need for additional energy-intensive monitoring systems while maintaining detection accuracy.