Washing Drum Rebalancing Before High-Speed Spin
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Solution Overview
Problem
Washing machines face challenges in balancing laundry during the water-draining process due to reduced wash water volume, leading to decreased mobility and potential inability to initiate the main spinning process.
Innovation Solution
The method involves draining wash water before the main spinning process, supplying wash water into the drum, and redistributing laundry by accelerating and decelerating the drum rotation to evenly distribute laundry, followed by high-speed spinning to extract water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If wash water is drained from the tub prior to main spinning, then laundry volume is reduced and mobility is increased, but laundry may become too dry and difficult to redistribute evenly
Solution Approach 1:
Wash water is supplied into the drum before the laundry redistribution process begins, ensuring the laundry is adequately moistened in advance. This preliminary action prevents the laundry from being too dry during the acceleration-deceleration cycles, allowing for smooth redistribution while maintaining reduced volume and improved mobility.
Solution Approach 2:
The drum undergoes repeated acceleration and deceleration cycles at low speed, creating periodic motion that gradually redistributes the laundry. This periodic action allows the laundry to be lifted, dropped, and repositioned multiple times, ensuring even distribution throughout the drum while maintaining moisture balance.
2Stability of the object's composition
If drum rotation is accelerated and decelerated repeatedly to redistribute laundry, then laundry distribution is improved, but processing time increases
Solution Approach 1:
The drum performs a limited number of acceleration-deceleration cycles rather than continuous operation. This partial action approach achieves sufficient laundry redistribution without excessive processing time, balancing distribution uniformity with time efficiency.
Solution Approach 2:
The drum rotation speed is dynamically changed between acceleration and deceleration phases, and between low-speed redistribution mode and high-speed spinning mode. These parameter changes enable efficient laundry redistribution followed by rapid water extraction, optimizing both distribution uniformity and processing time.
3Stability of the object's composition
If main spinning is delayed due to repeated laundry balancing, then laundry distribution may improve, but spin cycle initiation time increases significantly
Solution Approach 1:
Laundry redistribution is performed as a preliminary action before the main spinning process begins. By completing the balancing operation in advance with controlled acceleration-deceleration cycles, the system ensures laundry is properly distributed before high-speed spinning starts, avoiding delays during the spin cycle itself.
Solution Approach 2:
Once laundry redistribution is achieved through the preliminary acceleration-deceleration cycles, the system quickly transitions to high-speed main spinning without unnecessary delays. The skipping principle allows the system to rush through the spin cycle initiation once the balancing prerequisite is met, minimizing overall delay.
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 reduces laundry volume, increases mobility, and ensures even distribution, allowing for efficient initiation and completion of the spinning process, reducing vibration and noise.
Implementation Method 1
redistributing the laundry in the drum by repeatedly accelerating and decelerating the rotation of the drum
Implementation Method 2
performing the main spinning process by spinning the drum at a relatively high speed thereby extracting wash water from the laundry
Data Source
AI summary
A washing method and a washing machine are provided. Wash water is drained from a tub prior to initiating a main spinning process, and wash water is supplied into a drum to decrease the volume of the laundry which is increased by the draining. Therefore, it is possible to effectively reduce the volume of laundry and thus to improve the mobility of the laundry. Then, a main spinning process is performed by spinning the drum at high speed.