Washing Machine Drum Motion Control for Adaptable Washing Courses
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Solution Overview
Problem
Conventional laundry machines lack the ability to provide a variety of drum motions tailored to different washing courses, leading to inefficiencies in washing, rinsing, and spinning, particularly based on the weight of laundry, type of laundry, detergent, and degree of dirt.
Innovation Solution
A laundry machine with a control method that allows for multiple washing courses, including standard, weak, and strong courses, utilizing various drum motions such as rolling, tumbling, step, swing, scrub, and filtration motions, which are adjusted based on the laundry's weight, type, and soil level to optimize washing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional laundry machines use a single drum motion for all washing courses, then the device complexity is reduced, but the adaptability to different laundry types and washing conditions deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the drum to switch between multiple motion modes (rolling, tumbling, step, swing, scrub, filtration) based on washing conditions. The control system dynamically adjusts drum rotation speed, direction, and motion patterns to match different laundry types, soil levels, and detergent characteristics, transforming a static single-motion system into a dynamic multi-motion system that adapts to varying washing requirements
2Productivity
If multiple drum motions are implemented for different washing courses, then the washing efficiency is improved, but the device complexity increases
Solution Approach 1:
The patent implements universality by designing a single drum that can perform multiple washing functions through different motion patterns. The same drum structure executes rolling motion for gentle washing, tumbling for standard washing, step motion for heavy-duty washing, swing for rinsing, scrub for intensive cleaning, and filtration for water separation, eliminating the need for multiple specialized drums while maintaining washing efficiency across different course types
3Manufacturing precision
If drum motion is optimized for strong washing capability, then the washing ability is improved, but the energy consumption increases
Solution Approach 1:
The patent applies local quality by matching specific drum motion patterns to specific washing needs rather than using a single high-energy motion for all conditions. Gentle rolling motion is used for lightly soiled laundry requiring low energy, tumbling for standard conditions with moderate energy, step motion for heavy-duty washing with high energy demands, and swing or filtration for energy-efficient rinsing phases, optimizing energy consumption according to the local washing requirements of each cycle phase
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
The machine improves washing efficiency by providing optimal mechanical forces for different laundry types, reducing washing time, and enhancing customer satisfaction through customizable drum motions.
Implementation Method 1
Movement of the drum and friction between the laundry items, wash water and wash agents, and the interior of the drum, may facilitate contaminant removal from the laundry items
Implementation Method 2
the washing drum continues to rotate into a required target position using the inertia of the rotating system
Implementation Method 3
or the force resulting from the movement of the washing load in the washing drum
Implementation Method 4
an intense laundering program comprises a step of rotating the drum at a centrifuging speed while spraying washing water into the drum
Data Source
Figure 1~2
Figure 3(a)~3(g)
Figure 4(a)~4(d)
AI summary
A laundry machine and a control method thereof are provided in which laundering ability may be improved while also improving efficiency and noise/vibration. The laundry machine employs a plurality of drum motions by varying drum rotational speed, drum rotational direction, and drum starting and stopping point, to provide different motion of laundry items in the drum.