Dishwasher with guide rail
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Solution Overview
Problem
Automatic dishwashers face the challenge of unintentional dish rack removal due to failure to close the track closure, leading to potential accidents and inefficiencies in operation.
Innovation Solution
A U-shaped track closure with a self-aligning feature, including a wheel stop and chamfered ribs, that automatically pivots to the closed position when the dish rack is inserted or removed, preventing unintentional detachment and ensuring secure engagement with the guide rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a track closure is provided for dish racks to prevent unintentional removal, then safety is improved, but the device complexity increases due to additional components like guide rails and closure mechanisms
Solution Approach 1:
The track closure mechanism is designed to automatically engage and disengage without user intervention. When the dish rack is inserted into the guide rail, the closure automatically locks into place; when the rack is removed, the closure automatically opens. This self-service mechanism eliminates the need for manual operation while maintaining safety.
Solution Approach 2:
The guide rail acts as an intermediary element between the dish rack and the track closure. The guide rail guides the rack during insertion and removal, ensuring proper alignment and enabling the closure mechanism to automatically engage or disengage based on the rack's position, thus simplifying the overall system operation.
2Productivity
If the track closure automatically engages to prevent unintentional removal, then operational efficiency is improved, but the ease of operation deteriorates because users cannot easily remove racks when needed
Solution Approach 1:
The track closure mechanism is designed to be dynamic rather than static. It automatically transitions between locked and unlocked states based on the position and movement of the dish rack. When the rack is properly inserted, the closure locks to prevent accidental removal; when the rack is pulled out for intentional removal, the closure automatically unlocks, providing both safety and ease of operation.
Solution Approach 2:
The guide rail performs preliminary alignment action before the closure engagement. As the dish rack is inserted, the guide rail ensures proper positioning and alignment, which triggers the automatic engagement of the closure mechanism. This preliminary action by the guide rail simplifies the overall operation for the user.
Data Source
AI summary
A dishwasher with at least one guide rail. The guide rail can slidably couple a dish rack to a tub, where the tub defines at least a portion of a treating chamber. The dish rack can carry at least one wheel assembly that includes at least one wheel. The wheel can be contained in a wheel channel of the wheel assembly. The wheel channel can in part be defined by walls of the guide rail. A track closure can rotatably couple to the guide rail for the selective removal of the dish rack from the guide rail.