Dishwasher Filter Edge Geometry to Prevent Sump Residue Drop
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Solution Overview
Problem
Existing dishwasher filters accumulate residues at their peripheral edges during maintenance, which can fall into the sump and potentially block the drain or wash pumps, posing a risk of mechanical failure and hygiene issues.
Innovation Solution
A dishwasher filter with an inclined peripheral edge, where the edge is designed to slope inward at a minimum of 20°, preventing residue accumulation and ensuring they fall into the filter center during maintenance, thus preventing blockages and improving cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the filter peripheral edge is flat or rounded, then the filter structure is simple and easy to manufacture, but residues accumulate at the edge and can fall into the sump during maintenance
Solution Approach 1:
The filter edge is designed with different geometries at different locations: the first portion has a first geometry while the second portion has a second geometry, creating varying slopes along the edge. This local variation in geometry prevents residue accumulation at specific areas while maintaining overall structural simplicity and manufacturability.
2Reliability
If the filter edge geometry is complex to prevent residue accumulation, then reliability improves, but manufacturing complexity increases
Solution Approach 1:
The filter edge geometry is defined by varying parameters such as slope angles and radial distances along different portions of the edge. By systematically changing these geometric parameters from the first portion to the second portion, the design achieves effective residue prevention without requiring overly complex structures, maintaining manufacturability.
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 inclined edge design effectively prevents residue accumulation, enhancing maintenance safety, hygiene, and simplifying filter cleaning by ensuring residues are contained within the filter during maintenance, reducing the risk of pump blockages and improving overall dishwasher hygiene.
Implementation Method 1
the inclined wall 10 of edge 8' has a slope of at least 20° and preferably 45°... dirt residues having such a size as to pose a problem to the hydraulic circuit of the dishwasher can not remain on edge 8', in that said position is highly unstable, and fall toward the center of filter 1
Data Source
Figure 1~2
AI summary
Dishwasher filter (1) including a flared annular portion (6) and a peripheral edge (8'), in which said edge (8') includes a wall (10) substantially inclined downwards and toward the center of the filter (1). In this way, it is possible to prevent large residues potentially harmful for the dishwasher hydraulic circuit from accumulating at the peripheral edge (8') of the filter (1) and falling inside the underlying sump when the filter (1) is pulled out of its seat (2) during the maintenance phase.