Washing Machine Foam Float Control for Gentle Wash and Fast Rinsing
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Solution Overview
Problem
Conventional methods for managing foam in household washing machines are inefficient, leading to increased water and energy consumption, longer program durations, and mechanical issues due to either excessive foam formation or inadequate foam stabilization, which can hinder effective washing and rinsing processes.
Innovation Solution
A method that automatically controls foam levels by adding a foam-promoting agent before the end of the rinsing process and a foam-inhibiting agent when necessary, using sensors to monitor and adjust the foam threshold, allowing for optimal foam formation and removal without altering the washing program significantly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foam-promoting agents are added to generate sufficient foam for gentle washing, then washing quality for delicate fabrics is improved, but excessive foam formation occurs leading to mechanical issues and extended program durations
Solution Approach 1:
The patent employs a foam sensor to continuously monitor foam levels in the washing drum and provides feedback to the control unit. Based on this feedback, the control unit automatically adjusts foam management by adding foam-promoting agents when foam levels are insufficient or foam-inhibiting agents when foam levels are excessive, enabling dynamic optimization of washing quality while preventing program extensions
Solution Approach 2:
The system dynamically changes chemical parameters by adding different agents (foam-promoting or foam-inhibiting) based on real-time foam level detection. This allows the foam characteristics to be adjusted during the washing process, maintaining optimal foam levels for gentle washing without causing excessive foam accumulation that would extend program duration
2Object-affected harmful factors
If foam-inhibiting agents are added to remove excess foam, then mechanical issues are prevented, but water and energy consumption increase
Solution Approach 1:
The foam sensor continuously monitors foam levels and provides feedback to the control unit, which only adds foam-inhibiting agents when foam levels exceed the optimal threshold. This feedback-controlled approach prevents unnecessary addition of foam-inhibiting agents, thereby avoiding increased water and energy consumption while still preventing mechanical issues when they are actually needed
Solution Approach 2:
The system uses automatic foam detection and control to manage foam levels without requiring user intervention. The foam sensor and control unit work together to automatically add foam-inhibiting agents only when necessary, eliminating the need for users to manually add large amounts of foam-inhibiting agents would increase water and energy consumption
3Stability of the object's composition
If small-pored polyhedron foams are allowed to form, then foam stability is improved for gentle washing, but foam carpets form that hinder water drainage and cause foaming over
Solution Approach 1:
The foam sensor detects the presence and characteristics of foam in the washing drum and provides feedback to the control unit. When small-pored polyhedron foams that form stable foam carpets are detected, the control unit automatically adds foam-inhibiting agents to prevent foam carpet formation and drainage issues, while maintaining sufficient foam stability for gentle washing through controlled foam-inhibiting agent addition
Solution Approach 2:
The system applies foam management locally by adding foam-inhibiting agents only when and where needed (in the washing drum when foam levels exceed thresholds), rather than uniformly throughout the washing process. This localized approach maintains foam stability in areas where it is beneficial for gentle washing while preventing foam carpet formation in areas where it would hinder drainage
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 enables efficient foam generation and stabilization while minimizing energy and water usage, ensuring a gentler wash for delicate fabrics and preventing mechanical issues, thus achieving a balanced and efficient laundry process.
Implementation Method 1
a foam sensor is present in the washing drum for detecting the foam level
Implementation Method 2
the lowering of the surface tension of the aqueous phase through the accumulation of surfactants at the water/air interface means that the introduction of air, such as mechanical input when rotating a laundry drum, creates air bubbles and can be partially stabilized by the formation of a surface layer
Implementation Method 3
The basis for the formation of foam is therefore a dispersion of air in the washing suds
Data Source
AI summary
The present invention relates to a method comprising at least one washing process, the foam-forming float being used, and at least one rinsing process, said method being characterized in that a foam-promoting agent is automatically added during the washing process in an amount that can be predetermined each time, and a foam-suppressing agent is automatically added prior to the end of the rinsing process in an amount that can be predetermined.