Automatic cleaning filter and dishwasher equipped with the same
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Solution Overview
Problem
Dishwashers face issues with filter blockages due to accumulated foreign substances, leading to increased flow resistance, reduced washing performance, and the need for manual filter cleaning, which is costly and inefficient.
Innovation Solution
A dishwasher equipped with an automatic cleaning filter featuring a rotating filter with specific inlet and outlet configurations and a driver, which applies a shear force to separate foreign substances, reducing blockages and the need for manual cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filter device is used to remove foreign substances from washing liquid, then washing performance is improved, but flow resistance increases and the filter becomes blocked
Solution Approach 1:
The filter cleaning mechanism enables the filter to clean itself automatically during the washing cycle. The rotating blade, driven by the washing pump's rotation, continuously removes accumulated foreign substances from the filter surface, allowing the filter to maintain its cleaning capability without external intervention.
Solution Approach 2:
The filter cleaning system transforms the static filter into a dynamic system where the blade rotates along with the washing pump. This rotation creates continuous motion that prevents foreign substances from accumulating and blocking the filter, maintaining flow rate while preserving filtering effectiveness.
2Reliability
If manual cleaning of the filter is performed, then blockages are removed, but maintenance costs increase and efficiency decreases
Solution Approach 1:
The filter cleaning mechanism enables the filter to clean itself automatically during the washing cycle. The rotating blade, driven by the washing pump's rotation, continuously removes accumulated foreign substances from the filter surface, allowing the filter to maintain its cleaning capability without external intervention.
Solution Approach 2:
The filter cleaning occurs continuously throughout the washing cycle rather than requiring periodic manual intervention. The blade rotates continuously along with the washing pump, ensuring that foreign substances are removed as they accumulate, preventing blockages before they occur.
3Reliability
If a rotating blade is used to clean the filter, then foreign substances are removed, but the blade and filter wear away and fine dust increases
Solution Approach 1:
The washing pump's washing liquid flow is utilized to drive the blade rotation and simultaneously flush away removed foreign substances. The hydraulic action of the washing liquid carries the detached foreign substances away from the filter surface, preventing them from becoming fine dust that could be re-deposited.
Solution Approach 2:
The washing liquid acts as an intermediary between the blade and the foreign substances. Instead of the blade directly contacting and grinding foreign substances into fine dust, the washing liquid mediates by flushing them away after they are loosened by the blade's rotation.
4Extent of automation
If the washing pump rotates the filter, then automatic cleaning is achieved, but energy consumption increases
Solution Approach 1:
The washing pump serves dual functions: it circulates washing liquid for the primary washing function and simultaneously drives the blade rotation for filter cleaning. This multi-functionality allows automatic filter cleaning without requiring additional energy-consuming components or separate driving mechanisms.
Solution Approach 2:
The filter cleaning function is merged with the existing washing pump operation. The pump's rotation, which is necessary for washing liquid circulation, is combined with the blade drive mechanism, so that one motion accomplishes both washing and filter cleaning tasks simultaneously.
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 automatic cleaning filter effectively reduces flow resistance, improves washing performance, and lowers maintenance costs by automatically cleaning the filter without manual intervention, enhancing energy efficiency and dishwasher durability.
Implementation Method 1
a horizontal component of a predetermined direction faced by a first outlet and a horizontal component of a direction from the first outlet to a second outlet may form a predetermined angle greater than 0 degrees... in a portion where a direction in which the rotating filter rotates is opposite to a direction in which a washing liquid including foreign substances flows along the inner circumferential surface
Data Source
AI summary
The present disclosure relates to a dishwasher equipped with an automatic cleaning filter including a tub 12 provided with a washing space 12a that accommodates cooking vessels, a sump 100 disposed under the washing space 12a and configured to store a washing liquid, an automatic cleaning filter 200 disposed in the sump 100, and a washing pump 150 connected to the sump 100 and configured to re-circulate a washing liquid. The automatic cleaning filter 200 includes a rotating filter 210, an inlet guide 220, a filter housing 230, and a driver 270. The rotating filter 210 includes a plurality of first holes 213 and a lateral surface portion 212 surrounding a predetermined vacant space. The inlet guide 220 includes a first outlet 224 which discharges the washing liquid including foreign substances into the rotating filer 210.