Spiral Grille Air Guide Structure for Axial Fan Noise Reduction
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Solution Overview
Problem
Existing air outlet and air guide structures of fans and fan lights suffer from large ventilation resistance, loud noise, and limited air outlet angle and range due to poor structural design.
Innovation Solution
An air guide structure comprising a first inner ring, an outer ring, and a plurality of first grille bars, where the grille bars are twisted and spirally extending, with specific angles and orientations to reduce airflow resistance and noise, and enhance air discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If traditional air outlet and air guide structures are used, then the structure is simple, but the ventilation resistance is large and noise is loud
Solution Approach 1:
The grille bars are designed with curved surfaces instead of straight lines, forming a spiral twisted sheet structure. This curvature allows the air guide structure to smoothly guide airflow along curved paths, reducing turbulence and ventilation resistance while maintaining structural integrity
Solution Approach 2:
The air guide structure is divided into multiple segmented grille bars arranged in a circular pattern. Each grille bar acts as an independent flow guidance element, allowing optimized airflow control across different sections while maintaining overall structural simplicity
2Object-affected harmful factors
If traditional air outlet and air guide structures are used, then the structure is simple, but the noise is loud
Solution Approach 1:
The spiral twisted sheet configuration of the grille bars creates smooth curved airflow paths that minimize turbulence and eddy formation. This curved geometry reduces noise generation by preventing abrupt flow direction changes and flow separation
Solution Approach 2:
The grille bars are designed with specific geometric parameters including spiral twist angle, curvature radius, and bar spacing optimized to control airflow velocity and direction. These parameter optimizations reduce turbulence intensity and associated noise while maintaining effective air guidance
3Adaptability or versatility
If traditional air outlet and air guide structures are used, then the manufacturing is simple, but the air outlet angle and range are small
Solution Approach 1:
The spiral twisted sheet structure of the grille bars naturally guides airflow through curved paths, expanding the air outlet angle and influence range. The curved geometry provides aerodynamic guidance that increases the effective air distribution coverage area
Solution Approach 2:
The air guide structure combines multiple functional elements (annular structure, spiral twisted grille bars, specific angular orientations) into an integrated design that achieves enhanced air outlet performance while maintaining manufacturability through standardized component fabrication
Data Source
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AI summary
The present application provides an air guide structure of an axial flow fan and a ceiling fan lamp. The air guide structure comprises a first inner ring, an outer ring and a plurality of first grid strips; the first inner ring and the outer ring are both annular; the outer ring surrounds the periphery of the first inner ring; the first grid strips are evenly distributed in the circumferential direction of the first inner ring at intervals; each first grid strip has one end connected to the first inner ring, and the other end connected to the outer ring; each first grid strip is in the shape of a spirally-extending twisted sheet; the ceiling fan lamp comprises the air guide structure.