Washing Machine Water Drain Control for Variable Laundry Loads
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Solution Overview
Problem
Existing clothes washing methods in washing machines often face inefficiencies due to imprecise water level detection and management, leading to prolonged wetting phases and increased energy consumption, as they rely on preset water levels and drainage schedules that do not account for variable loads and clothing types.
Innovation Solution
A method that involves a partial water drain before the washing phase, adjusting the amount of water based on the selected washing program, load, and type of clothing, allowing for continuous or intermittent evacuation to optimize water levels and reduce the load on the washing machine motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If preset water levels and drainage schedules are used, then water management is simplified, but water level precision and energy efficiency deteriorate
Solution Approach 1:
The patent applies dynamics by making the drainage timing adjustable and adaptive rather than fixed. The control unit modifies drainage schedules based on detected water levels, clothing type, and load characteristics, transforming a static preset system into a dynamic responsive system that optimizes water management in real-time
Solution Approach 2:
The patent implements feedback by using water level detection means to continuously monitor the actual water level and comparing it against target levels. The control unit receives this feedback and adjusts drainage valve operation accordingly, creating a closed-loop control system that improves water level precision while maintaining manageable complexity
2Ease of operation
If preset water levels are used, then control is simplified, but wetting phase duration increases and energy consumption increases
Solution Approach 1:
The system dynamically adjusts the wetting phase duration based on actual water level detection and clothing characteristics. Rather than using fixed preset durations, the control unit modifies the wetting phase timing in real-time to achieve optimal water absorption with minimum energy expenditure
Solution Approach 2:
The patent changes operational parameters (water level targets, drainage timing, wetting duration) based on detected conditions such as clothing type and load characteristics. This parameter adaptation allows the system to maintain ease of operation while significantly reducing energy consumption by avoiding prolonged wetting phases
3Quantity of substance
If larger water volume is used, then washing coverage is improved, but motor load increases and energy consumption increases
Solution Approach 1:
The patent applies partial action by draining water at optimized intervals during the washing cycle rather than maintaining full water volume throughout. This partial drainage approach ensures sufficient water for washing coverage while reducing motor load during high-stress phases, achieving the right balance between washing effectiveness and energy efficiency
Data Source
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AI summary
Clothes washing method for a washing machine, comprising a wetting phase (3), wherein the clothes absorb water, and a washing phase (5), wherein the clothes are treated mechanically; and there is at least one partial water drain after the wetting phase (3) and before the end of the washing phase (5), so that a variable amount of water depending on the selected washing program and the clothing load and type inserted in the washing machine is extracted by means of said partial drain.