Dishwasher Sump Assembly With Elevated Self-Cleaning Filter
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Solution Overview
Problem
The self-cleaning filter assembly in dishwashers is unable to be effectively cleaned due to insufficient spraying pressure of washing water, leading to a deterioration in its purifying capability, as the water reserved on the floor of the tub prevents the lower nozzle from spraying water up to the filter assembly.
Innovation Solution
A sump assembly design that includes a self-cleaning filter assembly mounted on a filter supporting sleeve protruded above the sump cover, allowing the washing water to be sprayed directly onto the filter and maintaining a suspension state of foreign objects, with a fluid passage guide and washing pump to discharge water in multiple directions, ensuring effective cleaning and filtration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the self-cleaning filter assembly is mounted at the same level as the tub floor to improve space utilization, then the structure becomes more compact, but the spraying pressure of washing water cannot reach the filter assembly due to water accumulation on the floor
Solution Approach 1:
The filter assembly is elevated from the horizontal plane (tub floor level) to a higher vertical position using a support structure with vertical columns. This dimensional change in positioning allows spraying water to reach the filter from below without being blocked by water accumulation on the tub floor, while still maintaining compact space utilization through the vertical arrangement.
2Reliability
If the filter assembly is elevated to a higher position to ensure spraying pressure reaches the filter, then cleaning effectiveness improves, but the structural complexity increases
Solution Approach 1:
The support structure is segmented into distinct functional components: vertical columns for elevation, a support plate for mounting, and an integrated housing for the filter assembly. This segmentation allows each component to perform its specific function efficiently while maintaining overall structural simplicity and ease of assembly.
Solution Approach 2:
The support structure is merged with the housing of the filter assembly, where the vertical columns and support plate form an integrated mounting system. This merging reduces the number of separate parts and simplifies the overall structure while achieving the required elevation for effective spraying.
3Productivity
If the filter assembly is positioned higher to maintain foreign objects in suspension, then filtering efficiency improves, but the device complexity increases
Solution Approach 1:
The filter assembly is positioned at a higher vertical level above the tub floor, creating sufficient distance for foreign objects to remain in suspension state. This vertical positioning in another dimension allows gravity to maintain objects in suspension while they pass through the filter, improving filtering efficiency without requiring complex mechanical suspension mechanisms.
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 design enhances the purifying capability and filtering efficiency of the self-cleaning filter assembly by ensuring the spraying pressure of washing water effectively reaches the filter, preventing fouling and improving the collection of foreign objects, thus maintaining the dishwasher's performance.
Implementation Method 1
a fluid passage guide for discharging the washing water stored in the sump case in a predetermined direction, the fluid passage guide having a washing pump disposed therein
Implementation Method 2
the spraying pressure of the washing water sprayed from the lower nozzle cannot reach the mesh filter 128
Implementation Method 3
a self-cleaning filter assembly having a mesh filter; a mesh filter provided on at least opening of the self-cleaning filter to filter foreign objects entrained in the washing water
Implementation Method 4
maintaining a suspension state of foreign objects
Data Source
AI summary
There is provided a sump assembly of a dishwasher. The sump assembly includes a self-cleaning filter assembly having a mesh filter, a sump cover for mounting the self-cleaning filter assembly on a top surface thereof, the sump cover having a filter supporting sleeve extending upward for supporting the self-cleaning filter assembly, a sump case seating on an upper portion of the sump cover to reserve washing water, and a fluid passage guide for discharging the washing water stored in the sump case in a predetermined direction, the fluid passage guide having a washing pump disposed therein.