Dishwasher with door assembly
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Solution Overview
Problem
Users face difficulties when moving dish racks in and out of dishwashers due to interactions with sprayers, leading to stuck items and inconvenient repositioning processes.
Innovation Solution
The design incorporates a grid structure integral with the console near the pocket handle, which enhances the structural integrity and rigidity of the door assembly, reducing flex and improving the door's strength while maintaining or reducing weight, thus preventing items from getting stuck and simplifying the movement of the dish rack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the door assembly uses a simple panel structure, then manufacturing cost and weight are reduced, but structural integrity and rigidity deteriorate, causing flex during operation
Solution Approach 1:
The door panel is segmented into multiple regions by adding a grid structure with intersecting ribs that divide the panel surface into smaller cells. This segmentation increases structural rigidity without significantly increasing weight, as the ribs are strategically placed to provide support where needed during door opening and closing operations.
Solution Approach 2:
The door assembly uses a composite structure combining the base panel material with an integrated grid structure. The grid pattern creates a composite effect where the intersecting ribs work together with the panel to distribute stresses and resist deformation, enhancing overall strength while maintaining a relatively simple monolithic construction that avoids complex assembly.
2Stability of the object's composition
If the door assembly is made more rigid to prevent flex, then structural integrity improves, but weight and manufacturing complexity increase
Solution Approach 1:
The grid structure segments the door panel into multiple rigid zones defined by intersecting ribs. This segmentation allows the door to maintain rigidity through the distributed support provided by the grid pattern rather than requiring a uniformly thick or heavy construction, thereby reducing weight while improving stability.
Solution Approach 2:
The grid structure introduces geometric curvature and angular features through the intersecting ribs, creating a three-dimensional surface pattern that inherently resists bending and flexing. This geometric reinforcement provides rigidity without requiring additional material weight, as the structural strength comes from the shape and configuration rather than mass.
3Ease of manufacture
If the door assembly structure is simplified, then manufacturing cost decreases, but the door may flex during operation causing items to get stuck
Solution Approach 1:
The grid structure is designed as an integrated pattern that can be manufactured in a single piece with the door panel using standard molding or fabrication processes. The segmentation into grid cells provides reliable structural support to prevent flexing that would cause items to get stuck, while the overall design remains simple enough for cost-effective manufacturing without requiring complex assembly steps.
Solution Approach 2:
The composite grid structure is designed to be manufactured as an integrated component with the door panel, combining structural reinforcement with the door assembly in a single manufacturing process. This approach maintains ease of manufacture by avoiding separate assembly steps while providing the reliability needed to prevent door flexing and item entrapment during operation.
Data Source
AI summary
A dishwasher for treating dishes according to a cycle of operation, the dishwasher comprising a tub at least partially defining a treating chamber having an open face for receiving dishes a door assembly movable between opened and closed positions the door assembly comprising a door panel, a pocket handle defining a pocket width and proximate the top of the door panel for selectively opening and closing the open face of the tub, and a console coupled to the top of the door panel and comprising an isogrid structure at a location proximate the pocket handle.