Laundry Dryer Fire Shielding for Rollers and Water Pipes
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Solution Overview
Problem
Current laundry dryers lack effective and cost-efficient fire-resistant shielding to prevent the spread of internal fires, particularly affecting existing dryer designs and components like rollers and water pipes, which are prone to ignition and propagation of fires.
Innovation Solution
The implementation of fire-resistant roller covers and pipe coverings made from materials like stainless steel or fire-resistant plastic, which are designed to shield rollers and water pipes from internal fires within the dryer, providing comprehensive protection without obstructing the operation of the dryer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fire-resistant shielding is added to protect internal components, then fire safety is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent employs thin fire-resistant plastic sheets (e.g., 0.5-2mm thick) as shielding material for rollers and internal components. These thin film barriers provide effective fire protection while minimizing structural complexity and material usage, allowing the shielding to be integrated without significantly complicating the dryer design.
Solution Approach 2:
The fire-resistant shielding is designed to be nested within existing dryer structures. For example, fire-resistant covers are placed over rollers that are already mounted on the drum, and shielding plates are positioned within the existing cabinet space. This nesting approach provides fire protection without requiring separate external structures, thereby reducing overall device complexity.
2Reliability
If fire-resistant shielding materials are used, then fire resistance is improved, but manufacturing cost increases
Solution Approach 1:
The patent utilizes relatively inexpensive fire-resistant plastic materials (such as polypropylene or polycarbonate sheets) rather than expensive metals like stainless steel for all components. These cost-effective materials provide sufficient fire protection for the intended application, significantly reducing manufacturing costs while maintaining adequate fire resistance for safety compliance.
Solution Approach 2:
The patent optimizes the thickness parameter of fire-resistant materials to balance protection effectiveness with cost. By using thin sheets (0.5-2mm) rather than thick heavy-gauge materials, the design achieves adequate fire protection at lower material costs and easier manufacturability, demonstrating parameter optimization to resolve the cost-resistance trade-off.
3Reliability
If comprehensive fire shielding is implemented, then fire containment is improved, but ease of operation and maintenance deteriorates
Solution Approach 1:
The fire-resistant shielding is divided into separate modular components (individual roller covers, separate shielding plates for different areas) rather than a single monolithic structure. This segmentation allows specific shielding elements to be removed or accessed independently for maintenance without requiring disassembly of the entire shielding system, thereby maintaining ease of operation while providing comprehensive fire protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively contains and combats internal fires, preventing their spread to critical components and ensuring the safety of the dryer, while being applicable to existing designs and cost-effective.
Implementation Method 1
the fire-resistant shield may be configured to shield a roller... from a fire or burning within the cabinet
Data Source
AI summary
A laundry dryer includes a cabinet, a rotatable drum within the cabinet, a plurality of rollers rotatably supporting the rotatable drum, a process air moisture condensing device provided in a casing in a basement of the laundry dryer, and a water pipe operatively connected to at least one component of the condensing device. The laundry dryer comprises at least one fire-protection shield which contains a fire or burning within the cabinet of the laundry dryer. Accordingly to some aspects, the fire-protection shield includes a fire-resistant roller cover which covers a majority of a face of a corresponding roller such that the corresponding roller is shielded from a fire within the cabinet of the laundry dryer. According to other aspects, the fire-protection device includes a fire-resistant pipe covering configured to shield the water pipe from the fire or other burning within the cabinet of the laundry dryer.