Drum Washing Machine Water Circulation for Low-Water Rinsing
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Solution Overview
Problem
Conventional drum washing machines face challenges in uniformly supplying and utilizing washing water, especially when the water level is low, leading to inadequate washing and rinsing of laundry.
Innovation Solution
A washing machine design that includes a tub, a rotatable drum, a circulation unit to elevate washing water to the drum, and a spray nozzle to distribute the water uniformly across the drum's interior, ensuring effective washing and rinsing with a minimal amount of water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If washing water is supplied to the tub in a conventional drum washing machine, then the washing water can be used for washing laundry, but the washing water cannot be supplied up to the height of the laundry in the drum, resulting in inadequate washing and rinsing
Solution Approach 1:
The invention introduces a circulation unit with a circulation channel that vertically transports washing water from the bottom of the tub to the upper portion of the drum, adding a vertical circulation dimension to the washing water supply system. This allows washing water to reach laundry at heights that gravity alone cannot achieve, ensuring adequate washing and rinsing performance even with limited water quantity.
Solution Approach 2:
The circulation unit acts as an intermediary mechanism between the washing water in the tub and the laundry in the drum. It actively pumps and transports the washing water upward through the circulation channel, mediating the delivery of water to the drum's upper portion where it would otherwise be inaccessible, thus ensuring reliable washing performance.
2Quantity of substance
If washing water is absorbed into dry laundry in the initial stage, then the laundry becomes wet, but the water level drops below the expected level, preventing proper washing and rinsing
Solution Approach 1:
The circulation unit enables continuous circulation and redistribution of washing water throughout the washing process. Even as water is absorbed by laundry, the circulation system continuously pumps water from the tub bottom and redistributes it to the drum, maintaining effective water levels and ensuring ongoing washing and rinsing effectiveness throughout the operation cycle.
Solution Approach 2:
The circulation system creates a feedback mechanism where washing water that falls to the tub bottom is continuously detected and pumped back up through the circulation channel. This closed-loop circulation ensures that water is repeatedly utilized and redistributed, compensating for water absorption by laundry and maintaining adequate water levels for effective washing and rinsing.
3Quantity of substance
If a small amount of washing water is used, then water consumption is reduced, but the washing water cannot be uniformly supplied to laundry in the drum
Solution Approach 1:
The circulation channel introduces a vertical dimension to water distribution, transporting washing water from the tub bottom to the drum's upper portion. The spray nozzle then distributes this water uniformly across the drum interior, achieving even coverage with minimal water consumption by utilizing vertical transport followed by radial spray distribution.
Solution Approach 2:
The spray nozzle acts as an intermediary distribution device that receives washing water from the circulation unit and disperses it uniformly across the drum interior. This intermediary mechanism transforms the concentrated water flow from the circulation channel into a widespread uniform spray pattern, ensuring even water distribution to laundry throughout the drum with efficient water utilization.
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 efficient washing and rinsing of laundry even with a small amount of water by uniformly supplying and distributing water across the drum, preventing water absorption by dry laundry and maintaining effective washing performance.
Implementation Method 1
a circulation unit for circulating the washing water stored in the tub to the upper portion of the drum
Implementation Method 2
a spray nozzle for spraying the washing water, circulated by the circulation unit, to the rear portion of the inside of the drum
Data Source
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AI summary
A circulatory washing machine, in which water stored in the bottom of a tub is circulated and supplied to a drum. The washing machine includes a tub for containing washing water; a drum rotatably installed in the tub; a circulation unit for circulating the washing water stored in the tub to the upper portion of the drum; and a spray nozzle for spraying the washing water, circulated by the circulation unit, to the rear portion of the inside of the drum.