Dishwasher Door Assembly with Stiffener for Rigidity Enhancement
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Solution Overview
Problem
Conventional dishwasher door assemblies lack sufficient rigidity, leading to potential deflection and a perception of instability, which can affect the overall performance and user experience.
Innovation Solution
A door assembly design featuring an outer and inner door with a stiffener positioned between them, where the stiffener's rib is inserted into channels on the side and bottom flanges, enhancing the structural integrity and stability by creating a secure connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a stiffener is added to the door assembly, then the rigidity and stability are improved, but the device complexity increases
Solution Approach 1:
The stiffener is integrated with the inner door panel through channels and projections, merging two separate components (stiffener and door panel) into a unified structural assembly. This combination provides rigidity enhancement while maintaining a relatively simple overall structure, as the stiffener becomes part of the door assembly rather than a separate add-on component.
2Stability of the object's composition
If a stiffener is added to the door assembly, then the stability is improved, but the manufacturing complexity increases
Solution Approach 1:
The stiffener is designed as a separate component that can be manufactured independently and then assembled to the inner door panel. This segmentation allows for specialized manufacturing of the stiffener (optimizing its rigid structure) while keeping the door panel manufacturing relatively simple. The assembly process is facilitated by the channel-projection interface that guides proper positioning.
Solution Approach 2:
The stiffener is positioned within the interior space of the door assembly, with its rib extending into channels formed in the inner door panel. This nested arrangement allows the stiffener to be integrated into the existing door structure without requiring significant modifications to the overall door assembly manufacturing process.
3Ease of manufacture
If the stiffener structure is simplified, then the ease of manufacture is improved, but the rigidity and deflection resistance deteriorate
Solution Approach 1:
The stiffener is strategically positioned at specific locations on the inner door panel where rigidity is most needed, rather than uniformly reinforcing the entire door. The channel and projection features are located at critical stress points to provide maximum structural benefit with minimal additional material and manufacturing complexity.
Data Source
AI summary
A dishwasher including a cabinet with a treating chamber having an open face, which is selectively closed by a door assembly. The door assembly has an outer door spaced from an inner door to define an interior space between the outer and inner doors. A stiffener is located between the inner and outer doors.