A method of treating dishware in a domestic automatic dishwashing appliance
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Solution Overview
Problem
Existing automatic dishwashing machines lack effective detergent chemistry activation during the pre-washing step, limiting the overall cleaning performance and requiring consumers to wait for the main washing step for detergent benefits.
Innovation Solution
A water-soluble detergent pouch with a unique design allowing a portion to be placed inside the dispenser drawer and another portion to hang outside, connected by a linking film, enabling detergent chemistry to be active during both the pre-washing and main washing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If detergent chemistry is enclosed entirely inside the dispenser drawer, then the pouch structure is simple and easy to manufacture, but the detergent chemistry cannot be active during the pre-washing step, limiting cleaning performance
Solution Approach 1:
The pouch is divided into two distinct chambers: a first chamber that remains inside the dispenser drawer and a second chamber that hangs outside. This segmentation allows different portions of detergent chemistry to be released at different times - the first chamber for main washing and the second chamber for pre-washing, thereby improving cleaning performance without requiring complete structural redesign
Solution Approach 2:
The second chamber is positioned to hang outside the dispenser drawer before the washing cycle begins, allowing detergent chemistry to be active during the pre-washing step before the main washing occurs. This preliminary action enables cleaning benefits to start earlier in the cycle, improving overall cleaning performance
2Reliability
If detergent chemistry is released only during the main washing step, then the dispensing system is simple, but the pre-washing step lacks effective chemistry activation, reducing overall cleaning effectiveness
Solution Approach 1:
The detergent pouch is segmented into functional zones: the first chamber contains chemistry for main washing while the second chamber contains chemistry for pre-washing. This segmentation enables the dispensing system to maintain simplicity while delivering chemistry at multiple stages, improving cleaning effectiveness without complex mechanism additions
Solution Approach 2:
The water-soluble film linking the two chambers acts as an intermediary that allows the second chamber to be positioned outside the dispenser drawer while maintaining connection to the first chamber inside. This intermediary structure enables pre-washing chemistry delivery without requiring separate dispensing mechanisms
3Ease of operation
If a single unit dose pouch is used for both pre-washing and main washing, then consumer convenience is maintained, but the pouch must have complex structure to enable chemistry release at different times
Solution Approach 1:
The single unit dose pouch is segmented into two chambers that can be positioned differently during the wash cycle. This segmentation allows one chamber to release chemistry during pre-washing while the other releases during main washing, maintaining the simplicity of single-pouch consumer operation while achieving multi-stage chemistry delivery through internal structural differentiation
Solution Approach 2:
The single pouch structure is designed to perform multiple functions: the first chamber serves main washing while the second chamber serves pre-washing. This multi-functionality allows one product to replace what would traditionally require separate products or complex dispensing systems, maintaining consumer convenience while enabling advanced chemistry delivery
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 design enhances cleaning performance by allowing specific chemistry to target both steps, improving dishwashing outcomes while maintaining consumer convenience with a single unit dose product.
Implementation Method 1
a water-soluble pouch having a shape that enables part of the pouch to be contained inside the dispensing drawer of the automatic dishwashing machine, and part of the pouch to hang outside of the dispenser drawer
Implementation Method 2
the second component comprises protease and/or amylase
Data Source
AI summary
The present invention relates to a method for treating dishware in a domestic automatic dishwashing appliance, the method uses order of addition of chemistry into the washing zone of the domestic automatic dishwashing appliance.