Fiber Duct Connecting Piece With Gas-Tight Inner Layer
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Solution Overview
Problem
Existing connecting pieces for ventilation ducts made from sheet metal are costly, pose fire hazards, and present assembly and sealing challenges when used with ducts made from compressed fibre materials, which are self-supporting and flexible.
Innovation Solution
A connecting piece manufactured from compressed fibre material or mineral wool with a binder, featuring a configurationally stable portion and an inner fluid-impermeable layer, allowing for low-cost production, superior insulation, and safe assembly, comprising mirror-symmetric shell bodies with varying thicknesses for joining and entry portions, and an optional gas-impermeable layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If connecting pieces are made from sheet metal material, then structural strength is improved, but manufacturing cost increases and fire safety deteriorates
Solution Approach 1:
The patent changes the material parameters from metal to compressed fibre material with binder, transforming the connecting piece from rigid and expensive to flexible and cost-effective while maintaining sufficient structural strength for duct applications
Solution Approach 2:
The invention uses inexpensive compressed fibre material with binder instead of expensive sheet metal, making the connecting piece affordable and suitable for widespread use in ventilation systems
2Strength
If connecting pieces are made from sheet metal material, then structural strength is improved, but fire safety deteriorates
Solution Approach 1:
The patent changes the material composition from combustible metal to fire-resistant compressed fibre material with binder, eliminating fire hazards while maintaining the structural integrity needed for connecting duct sections
Solution Approach 2:
The invention uses a composite structure of compressed fibre material combined with binder, creating a material that possesses both structural strength and fire safety properties suitable for ventilation duct applications
3Strength
If connecting pieces are made from sheet metal material, then structural strength is improved, but assembly and sealing problems increase
Solution Approach 1:
The patent changes the material from rigid sheet metal to flexible compressed fibre material, enabling the connecting piece to adapt to slight misalignments and irregularities in duct connections, thereby simplifying assembly while maintaining structural strength
Solution Approach 2:
The invention introduces flexibility through compressed fibre material with binder, allowing the connecting piece to dynamically adapt to varying connection geometries and accommodate installation tolerances, improving ease of assembly
4Ease of manufacture
If connecting pieces are made from compressed fibre material with binder, then manufacturing cost is reduced and fire safety is improved, but insulation property deteriorates
Solution Approach 1:
The patent employs a composite structure where compressed fibre material with binder provides structural integrity and fire safety, while an added insulation layer compensates for thermal insulation properties, achieving a balance between cost-effectiveness and energy efficiency
Data Source
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AI summary
A connecting piece for a duct (5), preferably a ventilation duct, and comprising an inner flow space (6) in communication with the interior of the duct, the connecting piece having at least one joining portion (2) on which an end region of the duct is slidable and fixable, wherein the connecting piece includes a compressed fibre material and a binder, that the connecting piece displays a substantially configurationally stable portion (1) in association with the joining portion (2), and that the connecting piece displays, at least interiorly, a layer which is impervious to a fluid, in particular a gas, this layer being adjacent the inner flow space (6) of the connecting piece.