Method for treating laundry in a laundry washing machine and laundry washing machine
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Solution Overview
Problem
Existing laundry washing machines often result in non-homogeneous distribution of rinse additives, leading to uneven treatment of laundry items and potential stains, especially when using concentrated or super-concentrated forms.
Innovation Solution
A method involving a recirculation circuit in the washing machine that dilutes rinse additives at the bottom of the washing tub before reintroducing them into the drum, ensuring a homogeneous mixture is absorbed by the laundry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If rinse additive is added directly to the drum without dilution, then the treatment effect on laundry is enhanced, but non-homogeneous distribution occurs leading to stains and uneven treatment
Solution Approach 1:
The rinse additive is diluted with water in the washing tub before being introduced into the drum. This preliminary dilution action prevents direct contact of concentrated additive with laundry, avoiding stains and ensuring homogeneous distribution while maintaining treatment effectiveness.
2Productivity
If concentrated or super-concentrated rinse additives are used, then the dosage efficiency is improved, but the risk of non-homogeneous distribution and staining increases
Solution Approach 1:
Water acts as an intermediary substance between the concentrated rinse additive and the laundry. The additive is first mixed with water in the washing tub to create a diluted solution, which then contacts the laundry through the recirculation system, preventing direct harmful effects of concentrated additive while maintaining productivity.
3Device complexity
If rinse additive falls directly at the bottom region of the tub, then the device structure is simplified, but homogeneous mixing and distribution become difficult
Solution Approach 1:
The recirculation circuit continuously circulates the diluted rinse additive solution from the bottom region of the washing tub through the drum and back. This continuous circulation ensures homogeneous mixing and distribution of the additive throughout the washing tub, maintaining solution composition stability while keeping the delivery structure simple.
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 enhances the distribution and effectiveness of rinse additives, improving the homogeneity of treatment and reducing the risk of stains, particularly when using concentrated or super-concentrated forms.
Implementation Method 1
a step of activating the recirculation circuit in such a way that the rinse additive is diluted with dilution water at said bottom region of said washing tub
Implementation Method 2
a diluted rinse additive is obtained by mixing said quantity of said rinse additive with said first quantity of water at said bottom region of said washing tub
Implementation Method 3
introducing said diluted rinse additive into said washing drum in order to be absorbed by said laundry
Implementation Method 4
ensuring a homogeneous mixture is absorbed by the laundry
Data Source
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AI summary
The present invention relates to a method for treating laundry in a laundry washing machine (1; 201; 301; 401) of the type comprising: a washing tub (3) external to a rotatable perforated washing drum (4) adapted to receive laundry; a water supply circuit (5) to supply water into the washing tub (3); a detergent supplier (60) to supply detergent (D) into the washing tub (3); a rinse additive supplier (70) to supply at least one rinse additive (S) into the washing tub (3); a first recirculation circuit (30) suitable for withdrawing liquid from the bottom region (3a) of the washing tub (3) and for re-admitting such a liquid into the bottom region (3a) of the washing tub (3). The method comprises a washing phase (120) during which the laundry is washed with introduction of water and detergent (D) into the washing tub (3) and tumbled by rotation of the washing drum (4), at least one successive draining phase (125) for draining liquid from the washing tub (3) and at least one following rinsing cycle (130a, 130b,..., 130n; 130'n; 230a, 230b,..., 230n) during which the laundry is treated with the rinse additive (S). The rinsing cycle (130n; 130'n; 230n) comprises the steps of: introducing (140; 140'; 240) a quantity (Qs) of rinse additive (S) into the washing tub (3); introducing (140; 140'; 240) a first quantity (Q1w) of water (W) into the washing tub (3); activating (141; 141'; 241) the first recirculation circuit (30) for withdrawing liquid from the washing tub (3) and re-admitting the liquid into the washing tub (3) in such a way that the rinse additive (S) is diluted with the first quantity (Q1w) of water (W) at the bottom region (3a) of the washing tub (3); introducing (142; 142') the diluted rinse additive into the perforated washing drum (4) in order to be absorbed by said laundry.