Standoff feature for appliance
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Solution Overview
Problem
Existing appliance assembly technologies face challenges in preventing gaseous bubble entrainment and achieving an airtight seal due to sharp angles and interfaces within the adhesive, leading to stress locations and reduced thermal insulation efficiency.
Innovation Solution
A standoff feature with a base having vertical and horizontal members, tapered projections, and flanges is integrated into the appliance assembly, forming smooth surfaces to reduce bubble entrainment and create a buffer between panels, thereby minimizing sharp angles and enhancing the seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If panels are adhered together using conventional assembly methods, then the appliance structure is formed, but gaseous bubbles are entrained in the adhesive due to sharp angles and interfaces, creating stress locations and reducing thermal insulation efficiency
Solution Approach 1:
The standoff feature incorporates rounded corners and curved surfaces instead of sharp angles. The base portion has a generally curved configuration that eliminates sharp internal angles where adhesive can trap air bubbles. This curvature allows adhesive to flow smoothly around the standoff without creating pockets where gaseous bubbles can become entrained, directly addressing the bubble entrapment problem while maintaining structural integrity.
Solution Approach 2:
The standoff feature acts as an intermediary element between the first and second panels. It provides a buffer zone that separates the panels while allowing adhesive to flow around it smoothly. The standoff's rounded geometry mediates the interface between panels, preventing direct contact that would create sharp angles and bubble-trapping interfaces, thus improving seal quality without compromising structural strength.
2Loss of energy
If conventional adhesive assembly is used, then panels are joined together, but thermal insulation efficiency is reduced due to stress locations and bubble entrapment
Solution Approach 1:
By eliminating sharp angles and providing rounded surfaces, the standoff feature prevents air bubble entrapment in the adhesive. This ensures complete adhesive coverage and bonding, creating a reliable seal that maintains thermal insulation efficiency. The curved geometry eliminates stress concentration points that would otherwise compromise seal integrity and increase energy loss through thermal conduction.
Solution Approach 2:
The standoff feature changes the geometric parameters of the adhesive interface by introducing rounded surfaces and eliminating sharp angles. This parameter change affects adhesive flow characteristics, preventing bubble formation and ensuring uniform adhesive distribution. The result is improved seal integrity and maintained thermal insulation efficiency without energy loss.
3Reliability
If a standoff feature with rounded corners is used, then bubble entrapment is reduced and seal quality is improved, but the device complexity increases
Solution Approach 1:
The standoff feature combines multiple functions into a single integrated component: it provides mechanical support, creates the buffer zone between panels, and guides adhesive flow through its rounded geometry. By merging these functions into one element rather than using separate components, the design improves seal quality without proportionally increasing device complexity. The single-piece construction with integrated rounded features achieves bubble-free bonding without requiring additional assembly steps or multiple parts.
Data Source
AI summary
A standoff feature for an appliance includes a connecting member having a first end and a second end. A first side member extends in a first direction from the first end of the connecting member. A second side member is spaced from the first side member. The second side member extends in the first direction from the second end of the connecting member. A first flange extends from a first side edge of the connecting member. The first side edge extends between the first end and the second end. The first flange extends in a second direction from the connecting member. A second flange extends from a second side edge of the connecting member. The second side edge extends between the first end and the second end and opposes the first side edge. The second flange extends in the second direction from the connecting member.