Boost Fan Structure with Integral Inner Guider
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional counter rotating fans face challenges in manufacturing due to their large volume and complex fixing methods, which are unsuitable for air channels with slopes or curvatures, making it difficult to achieve reduced noise and increased wind pressure while maintaining structural integrity and ease of manufacturing.
Innovation Solution
A boost fan structure with a base, motor driver set, and rotary blade set, featuring static blades exposed on an annular curved surface of the inner guider, allowing for integral molding and reduced volume, along with an outer shroud with a curved inner wall to guide airflow efficiently, forming multiple air channels and reducing wind resistance and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fixing methods (long screws or latch design) are used for the outer frame, then the fan structure is secure, but the manufacturing becomes difficult when the air channel has slopes or curvatures
Solution Approach 1:
The patent merges the frame and inner guider into a single integral structure formed by injection molding. This eliminates the need for separate fixing components like screws or latches, resolving the contradiction by making the structure both secure (through integrated design) and easy to manufacture (through single-step molding process)
2Power
If counter rotating fan or serially connected fan is used to increase wind pressure and reduce noise, then the performance is improved, but the volume becomes huge and occupies larger operating space
Solution Approach 1:
The patent places the inner guider (with static blades) inside the outer shroud (with rotary blades), creating a nested configuration where the inner guider is positioned within the outer fan structure. This nested arrangement allows the system to achieve enhanced wind pressure and noise reduction effects while maintaining a compact volume, as the components are space-efficiently arranged rather than requiring separate large structures
3Volume of moving object
If the static blades are not exposed to the side of the frame, then the structure is compact, but the demolding during manufacturing becomes difficult
Solution Approach 1:
The patent segments the blade structure by having static blades that are exposed to the side of the frame, creating distinct functional zones. This segmentation allows the injection mold to efficiently demold the inner guider while maintaining a compact overall structure, as the exposed blades provide natural demolding paths without requiring excessive space
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design simplifies the fan structure, reduces volume, enhances airflow guidance, and decreases noise while maintaining performance, allowing for easier manufacturing and improved airflow efficiency.
Implementation Method 1
The outer shroud has a shell having a curved inner wall. The shell covers the rotary blade set and the inner guider to be combined with the frame. Plural air channels are formed between the outer shroud, the annular curved surface, and the static blades
Implementation Method 2
the static blades are inclined disposed on the annular curved surface and spaced to each other with a vortex-like structure
Data Source
AI summary
A boost fan structure includes a base, a motor driver set, a rotary blade set, and an outer shroud. The base has a frame and an inner guider having a body and plural static blades. The body is disposed in the frame and has an annular curved surface and a receiving space. The static blades are formed on the annular curved surface and exposed out of the frame. The motor driver set is disposed in the receiving space. The rotary blade set is disposed on a side of the inner guider and is driven by the motor driver set to rotate. The outer shroud has a shell having a curved inner wall. The shell covers the rotary blade set and the inner guider to be combined with the frame.