Composite material structural panel having an integral air channel
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Solution Overview
Problem
Laundry appliances face challenges in managing airflow and potential combustion events due to the accumulation of lint and fluff, which can lead to incineration and damage to structural components, especially in the air channel of the structural panel.
Innovation Solution
A structural panel for laundry appliances is designed with a lower portion made of heat-resistant talc-filled polypropylene and an upper portion made of calcium carbonate-filled polypropylene, where the two materials meet at a predetermined seam that extends through the air channel, optimizing the placement of heat-resistant materials to mitigate combustion risks while using less expensive materials where necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the entire structural panel is made of heat-resistant material, then combustion resistance is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies local quality by using heat-resistant material specifically in the air channel region where combustion risk exists, while using standard material in other areas. This targeted approach provides combustion resistance where needed without incurring the cost of making the entire panel heat-resistant.
Solution Approach 2:
The structural panel is segmented into different material zones: a first material for the air channel and a second material for other portions. This segmentation allows each region to have appropriate material properties, optimizing both safety and cost by not over-engineering areas that don't require heat-resistant properties.
2Reliability
If heat-resistant material is used throughout the structural panel, then combustion containment is improved, but wear resistance in high-impact areas deteriorates due to material limitations
Solution Approach 1:
The patent assigns different material properties to different regions: the air channel uses heat-resistant material for combustion containment, while other areas use material optimized for wear and impact resistance. This local optimization ensures each region has the specific properties it needs without compromising overall performance.
Solution Approach 2:
The structural panel uses composite construction with at least two different materials: a heat-resistant material for the air channel and a different material for other portions. This composite approach combines the advantages of heat resistance where needed with superior mechanical properties in other areas, achieving both combustion containment and wear resistance.
Data Source
AI summary
A laundry appliance includes a drum that processes laundry. A blower delivers process air from a heater to the drum via an airflow path. A structural panel defines a front aperture for accessing an interior of the drum and an air channel that defines a portion of the airflow path. The structural panel includes a lower first portion that is made of a first material and an upper second portion that is made of a second material that is different from the first material. The first and second materials meet at a predetermined seam that extends through the structural panel and the air channel.