Wood Fiber Filter Frame Debossing for Moisture Resistance
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Solution Overview
Problem
Air filtration systems with fiberboard filter frames face premature degradation due to moisture penetration, which shortens their lifespan when exposed to moisture-laden air.
Innovation Solution
A wood fiber-based filter frame with embossing and debossing features that prevent moisture penetration by eliminating scores or slits, ensuring the structural integrity and extending the filter's life, especially in high-moisture environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional die-cut and folded fiberboard filter frames are used, then manufacturing is simple and cost-effective, but moisture penetrates through scores and slits causing premature degradation
Solution Approach 1:
The patent changes the physical state of the filter frame material by applying a moisture-resistant coating or treatment to the fiberboard, transforming it from moisture-absorbent to moisture-resistant. This parameter change prevents moisture penetration while maintaining the traditional die-cut and folded construction method.
Solution Approach 2:
The patent creates a composite structure by combining fiberboard with a moisture-resistant coating or treatment layer. This composite material provides both the structural integrity of fiberboard and the moisture resistance needed to prevent degradation, effectively resolving the contradiction between simple construction and moisture protection.
2Ease of manufacture
If traditional folded edges without debossing are used, then manufacturing is simpler, but scores and slits allow moisture penetration
Solution Approach 1:
The patent applies debossing to the folded edges during the manufacturing process, creating grooves or channels before the final assembly. This preliminary action prevents moisture accumulation and penetration at the vulnerable folded edges while maintaining manufacturing efficiency through integration into the existing die-cut and folding process.
Solution Approach 2:
The patent applies moisture-resistant treatment or coating specifically to the folded edges and debossed areas, providing localized protection where moisture penetration is most likely to occur. This targeted approach protects vulnerable areas without requiring complete redesign of the entire filter frame structure.
Data Source
AI summary
Embodiments of the inventions include a filter frame and an air filter. The air filter has filtration media and a wood fiber-based filter frame securing filtration media. The filter frame having an upstream facing surface. The upstream facing surface having an orientation substantially perpendicular to a direction of air flow through the filter. The filter additionally having a plurality of sides coupled to the upstream facing surface, the plurality of sides having an orientation substantially parallel to the direction of air flow through the filter, the direction of air flow through the filter defining an exterior side of the filter frame; and a folded edge defined between the upstream facing surface and a first side of the plurality of sides, the folded edge having a debossing on the exterior side of the filter frame.