Axial Fan Sheet Metal Diffuser Temperature Stability
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Solution Overview
Problem
Contemporary axial fans with diffusers face issues with temperature stability, coloring, UV compatibility, and manufacturing challenges due to plastic materials, while seeking to optimize flow technology and robustness.
Innovation Solution
The axial fan design incorporates a sheet metal fan nozzle and external diffuser, with a cylindrical internal diffuser and support unit, featuring a two-part fan nozzle and touch protection grid, utilizing galvanized sheet steel for enhanced temperature resistance and mechanical resilience, and optimizing the diffuser geometry to convert dynamic air pressure into static pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic materials are used for fan nozzle and diffuser, then ease of manufacture is improved, but temperature stability and mechanical strength deteriorate
Solution Approach 1:
The patent applies composite materials by combining plastic components (fan blades, guide vanes) with metal components (fan nozzle, diffuser) to achieve both ease of manufacture and high mechanical strength. The plastic parts are injection-molded while the metal parts are deep-drawn and rolled, creating a hybrid structure that leverages the advantages of both material types.
2Ease of manufacture
If plastic materials are used for fan nozzle and diffuser, then ease of manufacture is improved, but temperature resistance deteriorates
Solution Approach 1:
The patent uses composite materials with metal components (galvanized sheet metal) for the fan nozzle and diffuser to provide high temperature resistance while maintaining ease of manufacture through deep-drawing and rolling processes. The metal construction allows operation in high-temperature environments where plastic would fail.
3Ease of manufacture
If plastic materials are used for fan nozzle and diffuser, then ease of manufacture is improved, but UV resistance and color stability deteriorate
Solution Approach 1:
The patent applies composite materials where metal components (galvanized sheet metal fan nozzle and diffuser) provide superior UV resistance and color stability compared to plastic. The metal construction maintains its appearance and structural properties under UV exposure, solving the degradation issues associated with plastic outdoor applications.
4Strength
If sheet metal is used for fan nozzle and outer diffuser, then temperature resistance and mechanical strength are improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the fan nozzle and outer diffuser into a single integrated sheet metal component manufactured as one piece through deep-drawing and rolling. This integration reduces the number of separate parts and assembly steps, thereby reducing manufacturing complexity while maintaining the mechanical strength advantages of sheet metal.
5Use of energy by moving object
If diffuser geometry is optimized to convert dynamic pressure to static pressure, then energy efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the diffuser function into the existing fan nozzle structure, creating an integrated component that performs both structural support and flow conditioning. The diffuser geometry is built into the sheet metal construction rather than being a separate component, thereby improving energy efficiency while minimizing additional device complexity.
Data Source
Figure 1a
Figure 1b
Figure 2~3
AI summary
The invention relates to an axial fan (1) with drive motor (5) and fan blades (6) as well as a circular cylindrical fan nozzle (2) and an adjoining outer diffuser (3), wherein the fan nozzle (2) and the outer diffuser (3) are made from a single piece of sheet metal, and wherein a support unit (4) for the drive motor (5) is provided, which simultaneously forms a cylindrical inner diffuser (8), and wherein the inner diffuser (8) extends in the axial direction towards the fan blades (6) to the axial end of the outer diffuser (3).