Dishwasher Rack Unloading Guide to Prevent Derailing on Door Rail
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Solution Overview
Problem
Dishwashers face issues with smoothly unloading accommodating units when pulled obliquely due to derailing, which affects user experience and efficiency.
Innovation Solution
The dishwasher design includes a tub with protrusions to guide and support the accommodating units, and a lower spray arm assembly with a rotating auxiliary arm mechanism that allows for smooth unloading along a door rail regardless of the pulling direction, utilizing a combination of main and auxiliary arms with distinct materials for enhanced strength and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a rail is formed on the door to guide accommodating unit movement, then the accommodating unit can be unloaded along the door, but the accommodating unit may derail when pulled obliquely
Solution Approach 1:
A guide member is introduced as an intermediary component between the accommodating unit and the door rail. This guide member extends from the front of the accommodating unit and fits into a corresponding groove on the door, acting as a mediator that ensures proper alignment and prevents derailing when the unit is pulled obliquely during unloading.
Solution Approach 2:
The guide member and door groove are designed to create a self-aligning mechanism where the geometry of the guide member and groove work together to maintain proper positioning throughout the unloading motion, ensuring that the accommodating unit remains aligned with the door rail regardless of pulling direction.
2Ease of operation
If the accommodating unit is designed for easy removal, then user convenience is improved, but the structural support and guidance requirements increase
Solution Approach 1:
The guidance system is segmented into distinct components: the door rail structure, the guide member on the accommodating unit, and the corresponding groove on the door. This segmentation allows each component to perform its specific function independently while working together to achieve smooth unloading, balancing ease of removal with manageable structural complexity.
Data Source
AI summary
A dishwasher is provided that may include a tub configured to define a washing space in which a washing object is washed, the tub having an open side, a first accommodating rack configured to accommodate the washing object inside of the tub, the first accommodating rack being unloadable from the tub, and a door configured to selectively open and close the open side of the tub, the door supporting the first accommodating rack when the first accommodating rack is unloaded. The tub may include a first protrusion protruding from an inner sidewall of the tub toward the washing space so as to support the first accommodating rack and guide movement of the first accommodating rack, and a second protrusion provided above the first protrusion and protruding from the inner sidewall of the tub toward the washing space so as to prevent the first accommodating rack from being lifted upward when the first accommodating rack is unloaded.