Washing machine and washing method
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Solution Overview
Problem
Existing laundry liquid compositions for auto-dosing washing machines face challenges due to physical stress, preservation issues, and clogging in the auto-dosing apparatus, which are not adequately addressed by conventional detergents.
Innovation Solution
A washing machine with a detergent reservoir containing 80 to 3000 ml of liquid detergent comprising an isothiazolinone preservative, designed for multiple washing cycles, and a method involving partial detergent draw and retention post-cycle to maintain detergent quality and prevent clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If liquid detergent is stored in the detergent reservoir for multiple washing cycles, then the detergent is subjected to physical stress and temperature changes, but this leads to preservation issues and potential clogging in the auto-dosing apparatus
Solution Approach 1:
The detergent is formulated with isothiazolinone preservative and specific surfactant combinations before storage, preparing it in advance to resist degradation during multi-cycle storage in the detergent reservoir, thereby maintaining stability and preventing clogging throughout the storage period
Solution Approach 2:
The detergent composition is specifically designed with controlled viscosity, surfactant concentration, and preservative levels to maintain optimal physical and chemical parameters during storage, preventing phase separation, crystallization, or thickening that would cause clogging in the auto-dosing apparatus
2Ease of operation
If the detergent reservoir stores sufficient liquid detergent for multiple washing cycles, then convenience is improved, but the detergent must withstand temperature fluctuations and physical stress
Solution Approach 1:
The detergent is formulated as a composite system combining isothiazolinone preservative with specific anionic and non-ionic surfactants, creating a synergistic composition that maintains stability under temperature fluctuations and physical stress while enabling multi-cycle storage convenience
Solution Approach 2:
The detergent formulation includes preservatives and stabilizers that provide protective cushioning against temperature changes and physical stress before they occur, preventing degradation and maintaining composition stability throughout the multi-cycle storage period
3Productivity
If liquid detergent is drawn partially from the reservoir after each washing cycle, then clogging is prevented, but the remaining detergent must maintain quality over extended periods
Solution Approach 1:
The detergent formulation maintains continuous effectiveness throughout the storage period between partial draws, with preservatives and stabilizers ensuring consistent quality and performance across multiple washing cycles, preventing degradation that would affect cleaning efficacy
Solution Approach 2:
The detergent composition is designed with self-monitoring properties where the preservative system responds to changes in the detergent environment, maintaining quality consistency through extended storage periods between partial draws by actively preventing microbial growth and chemical degradation
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 solution ensures effective preservation and free-flowing detergent operation, preventing clogging and maintaining cleaning efficacy across multiple cycles, addressing the unique stress conditions of auto-dosing machines.
Implementation Method 1
liquid detergent comprising an isothiazolinone preservative
Data Source
AI summary
Washing machine comprising a detergent reservoir, said reservoir comprising from 80 ml to 3000 ml liquid detergent comprising an isothiazolinone preservative.