Systems for multi-channel conduits in dishwasher appliances
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Solution Overview
Problem
In dishwasher appliances, the positioning of articles affects fluid dynamics during the cleaning process, leading to variations in spray patterns, velocities, and durations across different rack assemblies, which can impact cleaning effectiveness and efficiency.
Innovation Solution
A dishwasher appliance design featuring a wash conduit with co-planar inlets for multiple supply channels, each terminating on the same plane but with different shapes, to facilitate precise fluid distribution and prevent incorrect assembly, combined with a diverter assembly for selective fluid distribution to various spray assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple supply channels are used to deliver fluid to different rack assemblies, then cleaning coverage and effectiveness are improved, but fluid distribution uniformity and assembly precision deteriorate due to variations in spray patterns, velocities, and durations
Solution Approach 1:
The wash conduit is segmented into multiple separate supply channels (first supply channel, second supply channel, etc.), each independently configured to deliver fluid to specific rack assemblies. This segmentation allows precise control over fluid distribution to different areas, resolving the contradiction by enabling both comprehensive cleaning coverage and uniform fluid distribution through dedicated channels for each rack assembly.
2Adaptability or versatility
If multiple supply channels with different configurations are used to accommodate various rack positions, then adaptability to different rack assemblies is improved, but device complexity increases due to multiple inlet shapes and configurations
Solution Approach 1:
Each supply channel inlet is given a specific local quality (unique shape) matched to its corresponding rack assembly requirements. The first supply channel inlet has a first shape, the second supply channel inlet has a second shape, and so on. This local differentiation enables each channel to be optimally adapted to its target rack assembly while maintaining overall system manageability through modular channel design.
Solution Approach 2:
The supply channel inlets are designed with asymmetric, non-uniform shapes rather than identical circular openings. Each inlet shape is specifically configured to match its corresponding rack assembly, creating an asymmetric system that enhances adaptability while the modular channel structure keeps the overall device complexity manageable.
3Manufacturing precision
If co-planar inlets with different shapes are used for multiple supply channels, then assembly precision and alignment are improved, but manufacturing complexity increases due to concurrent trimming requirements
Solution Approach 1:
The blow molding process is designed to preliminarily form all supply channel inlets in their final co-planar positions with different shapes. By establishing the precise co-planar alignment and unique shapes during the initial molding operation, subsequent trimming operations become simpler and more consistent, resolving the contradiction between achieving high alignment precision and maintaining manufacturing simplicity.
Data Source
AI summary
A dishwasher appliance includes a tub that defines a wash chamber, and a diverter assembly at a bottom of the wash chamber. The dishwasher appliance also includes a wash conduit in the wash chamber. The wash conduit includes a first supply channel extending between the diverter assembly and a wash conduit outlet, and a second supply channel extending between the diverter assembly and an upper spray assembly. An inlet comprises both a first supply channel inlet and a second supply channel inlet. The first supply channel inlet and the second supply channel inlet are co-planar. The first supply channel inlet and the second supply channel inlet are different shapes.