Portable Heater Roll Cage Structure for Impact Protection
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Solution Overview
Problem
Conventional portable gas forced air heaters are prone to damage from outside forces due to their design, which can compromise safety and operational effectiveness during storage, handling, and transportation.
Innovation Solution
The portable gas forced air unit features a cylindrical housing with protective end caps and roll cage bars that distribute external forces, minimizing damage and providing a safe operating condition by allowing the end caps and roll cage bars to absorb impacts first, while also enabling easy interconnection of multiple units for increased heat output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional portable gas forced air heaters are used without protective structures, then the device complexity is reduced and manufacturing cost is lower, but the reliability and durability deteriorate due to damage from outside forces during storage, handling, and transportation
Solution Approach 1:
The protective structure is segmented into multiple independent components: end caps that fit over the ends of the housing, and roll cage bars that connect between the end caps. This segmentation allows each component to be optimized for its specific protective function while maintaining overall structural integrity and allowing for easy assembly and disassembly during storage and transportation.
Solution Approach 2:
The roll cage bars and end caps are positioned to protrude outward from the housing, creating a protective barrier that absorbs and distributes external forces before they can reach the vulnerable internal components. This beforehand protection ensures that the heater maintains its operational integrity even when subjected to impacts or rough handling during storage, handling, and transportation.
2Object-affected harmful factors
If protective end caps and roll cage bars are added to the heater, then protection from external forces is improved, but the weight and size of the unit increase
Solution Approach 1:
The end caps are designed as thin-walled structures that can be formed from sheet metal or plastic, providing effective protection against external forces while minimizing additional weight. The roll cage bars use a tubular configuration that offers high strength-to-weight ratio, protecting the housing without significantly increasing the overall unit weight.
3Reliability
If protective structures are added to the heater, then manufacturing cost increases, but the safety and operational effectiveness are improved
Solution Approach 1:
The protective structure is divided into separate end caps and roll cage bars that can be manufactured using standard sheet metal forming or plastic molding processes, and then assembled to the housing using simple fastening methods. This segmentation allows for efficient manufacturing of individual components and reduces assembly complexity, thereby minimizing the impact on manufacturing cost while providing enhanced safety.
Data Source
AI summary
An elongated generally cylindrical shell of a portable gas forced air unit is provided with a roll cage for protection. A pair of end caps located at each proximate end of the shell are connected by a plurality of roll cage bars extending parallel with the combustion chamber, whereby, the combination of end caps and roll cage bars serve to protect the concentric shell and its internal combustion chamber from damage. The end caps include a plurality of end bumps dimensioned and located to protect the outer extent of the portable unit while being oriented in substantially vertical or horizontal positions, and serve to support the portable unit when in a vertical position on a surface. The portable gas forced air unit is also adapted to be releasably interconnected with similar units.