Laundry Washing Solution Recirculation for Low-Water Detergent Wetting
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Solution Overview
Problem
Existing laundry washing machine techniques face issues with detergent distribution, leading to inefficient detergent usage, suboptimal laundry wetting, high water consumption, and increased power consumption due to inefficient drum rotation during the wetting phase.
Innovation Solution
A method involving a recirculation circuit that absorbs a washing solution by the laundry, with a mixing phase using a recirculating device to ensure uniform detergent distribution, followed by controlled heating and maintenance phases to optimize detergent usage and reduce water and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high pressure spray nozzles are used to distribute detergent, then detergent distribution is enhanced, but water consumption increases
Solution Approach 1:
The detergent is pre-dissolved in water within the detergent reservoir before being applied to the laundry. This preliminary mixing action ensures uniform detergent distribution without requiring high-pressure spray systems during the washing phase, thereby reducing water consumption while maintaining distribution effectiveness.
Solution Approach 2:
A detergent reservoir with recirculation means acts as an intermediary system between the detergent supply and the laundry. The recirculation means continuously circulates the wash liquor through the reservoir, ensuring thorough mixing and uniform detergent distribution without direct high-pressure spraying onto the laundry, thus reducing water usage.
2Manufacturing precision
If multiple spray nozzles and drum stopping are used for detergent distribution, then detergent reaches laundry more effectively, but power consumption increases
Solution Approach 1:
Detergent is pre-mixed with water in the reservoir before the washing cycle begins. This preliminary preparation eliminates the need for multiple spray phases and drum stopping during washing, ensuring effective detergent application while maintaining continuous drum rotation and reducing power consumption.
Solution Approach 2:
The recirculation means continuously circulates wash liquor through the detergent reservoir throughout the washing phase, ensuring constant detergent availability and uniform distribution without interrupting drum rotation. This continuous action eliminates the need for stopping the drum multiple times, reducing power consumption while maintaining effective detergent application.
3Manufacturing precision
If recirculation continues until detergent is substantially dissolved, then detergent distribution is optimized, but washing time increases
Solution Approach 1:
Detergent is pre-dissolved in water within the reservoir before the washing cycle starts. This preliminary dissolution action ensures complete detergent mixing without requiring extended recirculation time during washing, thereby optimizing detergent distribution while reducing overall washing cycle duration.
Solution Approach 2:
The system rushes through the detergent dissolution phase by pre-mixing in the reservoir before washing begins. The recirculation means then quickly circulates the pre-prepared wash liquor during washing, skipping the need for prolonged recirculation to achieve dissolution, thus reducing washing time while maintaining complete detergent distribution.
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 method enhances detergent efficiency, reduces water and power usage, and ensures complete wetting of laundry while minimizing waste energy, resulting in improved washing performance.
Implementation Method 1
recirculating said washing solution inside said washing tub by means recirculation means until said washing solution is absorbed by said loaded laundry inside said washing drum
Implementation Method 2
activate heating means for heating said wetted loaded laundry inside said washing drum
Implementation Method 3
recirculating said washing solution inside said washing tub by means recirculation means until said washing solution is absorbed by said loaded laundry
Data Source
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AI summary
The present invention relates to a method for washing laundry (30) in a laundry washing machine (1;101;201;301;401;501) comprising a washing tub (3) external to a rotatable washing drum (4) wherein the laundry (30) to be washed is loaded. The method comprises the steps of: - providing a quantity of detergent; - providing a first quantity of water to form with the quantity of detergent a quantity of washing solution; - introducing the washing solution into the washing tub (3); - recirculating the washing solution inside the washing tub (3) by means of recirculation means until the washing solution is absorbed by the loaded laundry (30) inside the washing drum (4) and the level (Lr;L) of the washing solution is below the washing drum (4); - activate heating means (20;120) for heating the wetted loaded laundry (30) inside the washing drum (4); - deactivate the heating means (20;120) and maintain the heated wetted loaded laundry (30) inside the washing drum (4) for a predetermined dry maintenance time; - supplying a second quantity of water in the washing tub (3); - rotating the washing drum (4); - rinsing the loaded laundry (30) by means of drum rotations and by means of liquid drainage from the washing tub (3).