Rotating Dishwasher Filter Assembly for Self-Cleaning Recirculation
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Solution Overview
Problem
Conventional dishwashers face inefficiencies in filtering and recirculating wash liquid due to clogging issues, which can lead to reduced cleaning performance and increased maintenance requirements.
Innovation Solution
A dishwasher design incorporating a rotating filter with a diverter system and a controller that adjusts the gap size based on clogging levels, along with a sensor to monitor filter clogging, ensures effective filtration and recirculation by applying increased shear forces to remove soil particles and prevent re-deposition on utensils.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter is used to remove soil particles from wash liquid, then cleaning performance is improved, but the filter clogs and requires maintenance
Solution Approach 1:
The filter assembly performs self-cleaning through a dual-mode operation system. A controller alternates between a first mode where the filter media is stationary for filtration, and a second mode where the filter media rotates to甩 off accumulated soil particles. This automated self-maintenance eliminates manual intervention, allowing the filter to clear itself of clogs without user repair while maintaining continuous cleaning performance.
2Productivity
If the filter rotates at high speed to remove soil particles, then cleaning efficiency is improved, but energy consumption increases
Solution Approach 1:
The filter assembly operates in periodic cycles, alternating between a first mode where the filter media is stationary for liquid filtration and a second mode where it rotates at high speed to remove soil particles. The controller automatically switches between these modes, allowing the high-energy rotation to occur only intermittently when needed for soil removal, rather than continuously. This periodic operation maintains high filtration efficiency while significantly reducing overall energy consumption compared to continuous rotation.
3Device complexity
If a stationary filter is used, then结构简单 is maintained, but soil particles re-deposit on utensils
Solution Approach 1:
The filter assembly employs a dynamic filter media that can transition between stationary and rotating states based on operational requirements. During the first mode, the filter media remains stationary for normal filtration. During the second mode, the filter media rotates to mechanically甩 off accumulated soil particles, preventing their re-deposition on utensils. This dynamic capability is controlled automatically, maintaining relatively simple structure while eliminating the re-deposition problem associated with stationary filters.
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 solution enhances filtration efficiency, reduces maintenance needs, and maintains cleaning performance by dynamically adjusting the filtration process to address clogging, ensuring cleaner utensils and extended appliance life.
Implementation Method 1
applying increased shear forces to remove soil particles and prevent re-deposition on utensils
Data Source
AI summary
A dishwasher with a tub at least partially defining a treating chamber, a liquid spraying system, a liquid recirculation system defining a recirculation flow path, and a liquid filtering system. The liquid filtering system includes a rotating filter disposed in the recirculation flow path to filter the liquid.