Control method of laundry machine
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Solution Overview
Problem
Conventional laundry machines face inefficiencies in washing cycles due to inadequate water circulation and distribution, leading to uneven laundry wetting and reduced washing efficiency, especially with larger laundry loads.
Innovation Solution
A control method that includes a circulating step to recirculate water within the tub during the washing cycle, combined with specific drum driving motions like scrub and step motions to enhance detergent dissolution and uniform laundry wetting, and the use of a circulation pump to ensure water reaches all areas of the drum.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If water is supplied into the tub during washing, then detergent dissolution and laundry wetting are improved, but water consumption increases
Solution Approach 1:
The circulation pump recirculates water from the tub bottom back to the drum, allowing the same water to be used multiple times for detergent dissolution and laundry wetting. This self-circulating system maximizes the utilization of each unit of water, reducing overall consumption while maintaining effective washing performance
Solution Approach 2:
The circulation pump operates continuously or intermittently throughout the washing cycle to maintain constant water circulation. This continuous circulation ensures that detergent solution is consistently distributed to the laundry, improving wetting uniformity without requiring additional water top-ups
2Manufacturing precision
If circulation pump is used to recirculate water, then detergent dissolution and water distribution are improved, but power consumption increases
Solution Approach 1:
The circulation pump operates in periodic intervals rather than continuously, circulating water at specific phases of the washing cycle when detergent dissolution and laundry wetting are most needed. This periodic operation reduces cumulative power consumption while maintaining effective water distribution
Solution Approach 2:
The circulation pump speed and flow rate are adjusted based on washing cycle requirements. By varying operational parameters such as pump speed, the system optimizes the balance between water circulation effectiveness and energy consumption, using higher flow rates only when necessary for detergent dissolution
3Manufacturing precision
If washing cycle is extended to improve detergent dissolution, then washing quality is improved, but washing time increases
Solution Approach 1:
The circulation pump maintains continuous water circulation throughout the washing cycle, ensuring that detergent solution is constantly moved and distributed to the laundry. This continuous action accelerates detergent dissolution and laundry wetting compared to static water conditions, reducing the time required to achieve effective washing
Solution Approach 2:
The circulation system is activated early in the washing cycle to pre-distribute detergent solution and initiate laundry wetting before the main washing phase begins. This preliminary circulation action ensures that detergent is already dissolved and distributed when the drum washing action starts, reducing the overall time needed for effective washing
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 results in a high-efficiency washing cycle that effectively dissolves detergents and uniformly wets laundry, reducing washing time and minimizing noise and vibration, even with larger loads.
Implementation Method 1
a circulating step of circulating the water inside the tub to re-supply the water to the tub, the circulating step being implemented in a heating step
Implementation Method 2
a heating step of heating the water
Data Source
Figure 1
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AI summary
A control method of a laundry machine is disclosed. The control method of a laundry machine comprising a circulating step configured to circulate water inside the tub to re-supply the water to the tub, the circulating step implemented in a heating step.