Laundry Detergent Recirculation Mixing for Faster Wetting
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Solution Overview
Problem
Existing laundry washing machine methods require a lengthy mixing phase for detergent and water, which is inefficient and necessitates complex structural constructions.
Innovation Solution
A method involving a first mixing flow of water to form a washing solution, followed by a second recirculation flow to enhance detergent dispersion, utilizing a re-circulation circuit and a two-way valve to control the liquid flow, reducing the mixing phase duration and simplifying the machine's structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a mixing step is performed in the wash liquor reservoir by recirculation, then the detergent is substantially dissolved or dispersed in the water, but the wetting phase takes a long time to be completed
Solution Approach 1:
The patent applies preliminary action by pre-mixing the detergent with water in a separate mixing chamber before introducing the mixture to the washing drum. This preliminary mixing step ensures the detergent is fully dissolved and dispersed before the main washing cycle begins, eliminating the need for prolonged recirculation mixing during the wetting phase and thereby reducing the overall time required.
2Manufacturing precision
If a mixing step with recirculation is implemented, then the detergent composition is substantially dissolved or dispersed in the water, but a complex structural construction is required
Solution Approach 1:
The patent applies segmentation by dividing the washing machine into distinct functional modules: a separate mixing chamber for detergent preparation, a washing drum for the main washing cycle, and a control unit. This segmentation allows each component to perform its specific function efficiently, simplifying the overall structure compared to a single integrated recirculation system while ensuring thorough detergent dissolution in the dedicated mixing chamber.
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 significantly reduces the mixing phase duration while ensuring effective detergent dispersion, independent of the selected washing program, and can be applied to various types of laundry washing machines.
Implementation Method 1
a step of conveying a first mixing flow of water from the water supply system to the containing unit to form a washing solution for wetting and washing said laundry with said washing product
Implementation Method 2
a step of withdrawing at least a portion of said washing solution from said washing tub in order to create a second mixing flow of liquid and the step of conveying said second mixing flow to said containing unit
Data Source
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AI summary
The present invention relates to a method for washing laundry (10) in a laundry washing machine (1), the laundry washing machine (1) comprising a washing tub (3) external to a washing drum (4) suited to receive the laundry (10), a containing unit (6) suitable to receive a quantity (Qd) of a washing product (D) and a water supply system (15) suitable to convey water (W) to the containing unit (6). The method comprising a step of conveying a first mixing flow (F1) of water (W) from the water supply system (15) to the containing unit (6) to form a washing solution (S) for wetting said laundry (10) with said washing product (D) and a step of conveying the washing solution (S) from the containing unit (6) to the washing tub (3). The method further comprises the step of withdrawing at least a portion of the washing solution (S) from the washing tub (3) in order to create a second mixing flow (F2) of liquid (S) and the step of conveying the second mixing flow (F2) to the containing unit (6).