Appliance trim breaker
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Solution Overview
Problem
Existing trim breakers for appliances lack effective reinforcement structures to maintain insulation integrity and structural stability during vacuum sealing and thermal cycling, leading to strain and potential buckling issues.
Innovation Solution
A trim breaker design featuring integrally formed vertical, top, and bottom portions with a central portion, and multiple ribs extending from the outer rim, including central and angled ribs, which enhance structural stiffness and insulation sealing by distributing stress and maintaining wall thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If trim breaker lacks reinforcement structures, then manufacturing is simpler, but structural stability and insulation integrity deteriorate during vacuum sealing and thermal cycling
Solution Approach 1:
The trim breaker is segmented into multiple functional portions (first vertical portion, second vertical portion, top portion, bottom portion, and central portion) that are integrally formed. This segmentation allows each portion to be optimized for its specific function while maintaining overall structural integrity through integral formation, resolving the contradiction between manufacturing simplicity and structural reliability.
Solution Approach 2:
Ribs are added extending from the outer rim of the trim breaker portions, introducing a dimensional feature that increases structural stiffness without significantly complicating the manufacturing process. These ribs extend in directions that provide reinforcement against buckling and deformation during vacuum sealing and thermal cycling.
2Device complexity
If trim breaker lacks reinforcement structures, then device complexity is lower, but strain and buckling resistance worsen during vacuum sealing
Solution Approach 1:
The trim breaker is divided into five distinct portions (first vertical portion, second vertical portion, top portion, bottom portion, and central portion) that are integrally formed. This segmentation allows strategic placement of reinforcement ribs in specific areas where buckling resistance is most needed, rather than uniformly increasing complexity throughout the entire structure.
Solution Approach 2:
Ribs are strategically positioned on specific portions of the trim breaker (first vertical portion, second vertical portion, and/or central portion) rather than uniformly across the entire structure. This local reinforcement provides buckling resistance where most needed while minimizing overall structural complexity and material usage.
3Strength
If ribs are added to trim breaker, then structural stiffness improves, but manufacturing complexity increases
Solution Approach 1:
The trim breaker portions and ribs are integrally formed as a single monolithic structure, merging what could be separate components into one. This integral formation maintains manufacturing simplicity by eliminating the need for additional assembly steps, fasteners, or joints, while still providing the structural stiffness benefits of the rib reinforcement features.
Data Source
AI summary
A refrigerator appliance includes a cabinet having an inner liner spaced apart from an outer wrapper and a trim breaker extending between the inner liner and the outer wrapper to define an insulating cavity therebetween. The trim breaker includes first and second opposing vertical portions, a top portion, a bottom portion, and a central portion. The top portion is integrally formed with each vertical portion at a respective upper corner, and the bottom portion is integrally formed with each vertical portion at a respective lower corner. A first plurality of ribs extends from an outer rim of the trim breaker and at least partially along the central portion, and a second plurality of ribs extends from the outer rim of at least one of the first and second vertical portions and across at least one of the upper and lower corners.