Washing Machine Spin Cycle with Desatellization-Based Laundry Redistribution
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Solution Overview
Problem
Conventional washing machines face inefficiencies in spinning cotton laundry, as increasing drum rotation speed beyond a threshold offers minimal improvement and generates mechanical stress, risking damage while degrading fibers and increasing creasing.
Innovation Solution
A washing machine process involving a first spin phase at maximum speed, followed by slowing down the drum speed below desatellization speed, a stopping phase, a stirring phase to redistribute laundry, and a second spin phase at maximum speed, without increasing overall drum rotation speed, utilizing techniques like adding water or sudden braking to detach laundry from the drum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drum rotation speed is increased beyond a threshold to improve spin coefficient, then the spin performance is improved, but mechanical stress on the drum and washing machine increases, risking damage and degradation
Solution Approach 1:
The washing machine implements periodic action by alternating between high-speed spinning phases and low-speed stirring phases. During high-speed phases, the drum rotates at maximum speed to achieve effective spinning. During low-speed phases, the drum rotates slowly to redistribute laundry and reduce mechanical stress. This periodic alternation allows the system to achieve good spin performance while preventing excessive mechanical stress accumulation.
2Productivity
If the drum rotation speed is increased to improve spin coefficient, then the spinning efficiency is improved, but fiber degradation and creasing of laundry items increases
Solution Approach 1:
The periodic alternation between high-speed spinning and low-speed stirring phases allows laundry fibers to rest and redistribute during low-speed phases, preventing continuous high-speed mechanical stress that causes fiber degradation and creasing. This periodic action maintains spinning efficiency while protecting fabric integrity.
3Productivity
If the drum rotation speed is increased to improve spin coefficient, then the water removal efficiency is improved, but the cost of the washing machine increases due to need for more resistant components
Solution Approach 1:
By using periodic high-speed and low-speed phases, the washing machine achieves effective water removal without requiring components designed for continuous high-speed operation. This reduces the need for expensive high-stress-resistant materials and simplifies manufacturing while maintaining water removal efficiency.
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 process enhances spin performance by up to 5% without additional mechanical stress or cost, ensuring safer operation and quicker drying, meeting environmental standards.
Implementation Method 1
a first spinning phase at a maximum drum rotation speed level; a phase of slowing down the speed of rotation of the drum and said speed of rotation of the drum being less than at least one speed of desatellization of the laundry
Data Source
Figure 1
Figure 2
AI summary
The method involves drying clothes at a maximum speed of rotation of a rotative drum during a phase, and decelerating the speed of rotation of the drum, where the speed of rotation of the drum is lower than the speed of de-orbit of clothes. The clothes are dried at the maximum speed of rotation of the drum during another phase. The deceleration of the speed of rotation of the drum is set in work until the speed of rotation of the drum is lower than or equal to the speed of de-orbit of the clothes.