Fan Structure Fixing Ring Position for Noise Reduction
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Solution Overview
Problem
Conventional fan structures with taller fan blades experience noise issues due to chaotic backflow and pressure imbalances near the air inlet, leading to undesirable user experiences.
Innovation Solution
A fan structure design featuring a center portion with a bottom surface and center shaft, where fan blades are connected and a fixing ring is positioned between 40% to 80% of the blade height, avoiding the air inlet area where pressure imbalances occur, effectively fixing the blades and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the fixing ring is located at the top of the fan blades near the air inlet, then the fan blades are fixed, but noise is generated due to high pressure and low pressure meeting
Solution Approach 1:
The fixing ring is positioned at a specific location (40%-60% of blade height from the bottom surface) rather than uniformly distributed, creating a localized fixation zone that avoids the high-pressure air inlet area while maintaining blade stability. This local quality approach allows the structure to have different functional zones: the fixing ring zone for stabilization and the top zone for smooth airflow.
2Length of moving object
If the height of fan blades is increased, then the fan structure becomes more effective, but deformation occurs during manufacturing or operation
Solution Approach 1:
The invention changes the positional parameter of the fixing ring from the traditional top location to a specific height range (40%-60% of total blade height). This parameter change optimizes the structural stability by distributing stresses more effectively along the blade length, preventing deformation while maintaining the increased blade height for better fan performance.
3Object-generated harmful factors
If the fixing ring is disposed at 40% to 80% of the height of fan blades, then noise is reduced, but the fixation effectiveness may be compromised
Solution Approach 1:
The invention replaces the traditional mechanical fixation approach (fixing ring at the top) with an optimized structural arrangement where the fixing ring is positioned at 40%-60% blade height. This substitution creates a more efficient load distribution system that provides both noise reduction by avoiding the air inlet pressure zone and adequate fixation through optimized structural leverage.
Data Source
AI summary
A fan structure including a center portion, multiple fan blades, and a fixing ring is provided. The center portion includes a bottom surface and a center shaft. The center shaft is perpendicular to the bottom surface, and the direction in which the center shaft extends is an axial direction. The fan blades are mutually separated and connected to the bottom surface of the center portion and are disposed around the axial direction. Each of the fan blades has a height which is parallel to the axial direction. The fixing ring simultaneously contacts the side of the fan blades which is away from the center shaft. Along the axial direction, with the bottom surface of the center portion as a reference surface, the fixing ring is disposed at a range of 40% to 80% of the height of each of the fan blades.