Washing Drum Control for Laundry Disentangling Before Spin Drying
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Solution Overview
Problem
Conventional washing machines often entangle clothes during the dehydration process due to unbalanced laundry distribution, leading to delayed dehydration times, dehydration errors, and increased user effort to remove the laundry, and these machines lack effective disentangling methods that sufficiently shake and balance the laundry.
Innovation Solution
A washing machine with a control method that stepwise increases the motor RPM and adjusts the motor acceleration rate during the laundry disentangling process, allowing for efficient disentanglement by rotating the drum in both forward and reverse directions at varying speeds and accelerations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the motor rotates at the same RPM and acceleration rate during disentangling, then the control is simple, but the laundry cannot be sufficiently shaken and serious unbalance occurs
Solution Approach 1:
The motor control system dynamically adjusts rotation speed and acceleration rate based on operational phase. During disentangling, the system varies RPM and acceleration to sufficiently shake laundry and prevent unbalance, while maintaining simplicity through automated control sequences
Solution Approach 2:
The system implements periodic alternation between forward and reverse rotation during the disentangling phase. This periodic action sufficiently shakes the laundry to prevent unbalance while maintaining simple control through automated timing sequences
2Device complexity
If conventional disentangling process is used with fixed RPM, then the process is simple to implement, but dehydration time is delayed and dehydration errors occur
Solution Approach 1:
The motor control system dynamically adjusts rotation speed and acceleration based on operational phase. During disentangling, the system uses varied RPM and acceleration to prevent laundry unbalance, ensuring smooth transition to dehydration without delays or errors
Solution Approach 2:
The system changes motor parameters (RPM and acceleration rate) according to the operational phase. During disentangling, specific parameter variations are applied to shake laundry effectively, preventing subsequent dehydration problems while maintaining manageable process complexity
3Productivity
If laundry is entangled in the drum, then the washing process is complete, but user must exert large force to remove laundry
Solution Approach 1:
The system performs a preliminary disentangling action after washing completion. By rotating the drum forward and reverse at controlled speeds, the laundry is shaken loose from entangled positions before the user removes it, significantly reducing the force needed
Solution Approach 2:
The system implements periodic alternation between forward and reverse rotation during the disentangling phase. This periodic action sufficiently shakes the laundry to prevent unbalance, while maintaining simple control through automated timing sequences
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively disentangles tangled laundry, reduces dehydration time, and improves overall washing machine performance by ensuring balanced laundry distribution and easier removal, while also reducing drying time when integrated with a dryer.
Implementation Method 1
a washing machine for evenly disentangling tangled laundry using a laundry disentangling pattern, which is capable of stepwise-increasing a motor rpm simultaneously while adjusting a motor acceleration rate
Data Source
AI summary
A washing machine and a method of controlling a laundry disentangling process are disclosed, which uses a laundry disentangle pattern capable of stepwise increasing the motor rpm simultaneously while adjusting the acceleration rate of the motor. The method of controlling the laundry disentangling process in the washing machine, which includes a rotation drum containing laundry and a motor rotating the rotation drum to disentangle tangled laundry, includes stepwise-increasing an rpm of the motor, and adjusting a stepwise-acceleration rate of the motor, and performing the laundry disentangling process.