Ceiling Fan Dual Blade Nested Design Airflow Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ceiling fans suffer from air stagnation in the vertically downward region, limited airflow reach range, increased vibration and noise, complex coupling mechanisms, and inferior installation convenience due to excessive coupling points, leading to suboptimal air circulation and comfort.
Innovation Solution
A ceiling fan design featuring dual blades with a main blade and sub-blade configuration, where the sub-blade rotates within the main blade's blade hole, and a housing cover system that simplifies assembly and decoupling, reducing coupling points and enhancing stability, while optimizing airflow and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional single blade design is used, then device complexity is low, but airflow volume and air circulation are insufficient
Solution Approach 1:
The sub-blade is nested within the main blade structure, with the sub-blade positioned inside the blade hole of the main blade. This nested configuration allows dual blades to occupy the same spatial envelope, effectively increasing airflow volume without proportionally increasing device complexity or footprint.
Solution Approach 2:
The blade system is segmented into two functional components: the main blade for primary airflow generation and the sub-blade for secondary airflow enhancement. This segmentation allows each blade to be optimized for specific airflow functions, improving overall air circulation efficiency.
2Reliability
If multiple coupling points are used to connect blades, then structural stability improves, but assembly complexity and coupling points increase
Solution Approach 1:
The coupling mechanism is merged into a unified structure where the sub-blade is integrated with the main blade through a shared coupling system. The sub-blade's first end is coupled to the main blade's blade hole, creating a consolidated connection that reduces the number of separate coupling mechanisms while maintaining structural stability.
Solution Approach 2:
The coupling mechanism serves multiple functions: it connects the sub-blade to the main blade, provides structural support for both blades, and enables rotational movement. This multi-functionality reduces the need for separate specialized components, simplifying the overall coupling system.
3Productivity
If blades are coupled to form space at inner center, then airflow generation improves, but vibration and noise increase
Solution Approach 1:
The sub-blade is pre-positioned within the main blade's blade hole before operation, and the coupling mechanism is pre-configured to align the blades properly. This preliminary arrangement ensures that the blades work in coordinated harmony from the start, reducing unstable movements that cause vibration and noise during operation.
Solution Approach 2:
The main blade's blade hole structure acts as an intermediary between the sub-blade and the external environment, providing a controlled interface that guides airflow smoothly. This intermediary structure helps dampen vibrations and reduces noise by preventing direct exposure of the rotating sub-blade to external air turbulence.
4Area of stationary object
If dual blade design with sub-blade in blade hole is used, then airflow reach range and circulation improve, but manufacturing complexity increases
Solution Approach 1:
The dual blade system is segmented into modular components: the main blade with its blade hole and the separate sub-blade. This segmentation allows each component to be manufactured independently using standard processes, then assembled through the coupling mechanism, reducing overall manufacturing complexity despite the enhanced airflow capabilities.
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 dual blade design improves airflow volume and rate, minimizes air stagnation, reduces noise and vibration, and simplifies assembly, resulting in enhanced air circulation and user comfort with improved temperature distribution and reduced power consumption.
Implementation Method 1
a flow generating device which drives a fan to generate air flow
Implementation Method 2
The ceiling fan may circulate air in a room by using wind generated by the rotation of the blades
Data Source
Figure 1
Figure 2
Figure 3
AI summary
According to an embodiment of the present disclosure, a ceiling fan may include a shaft coupled to a ceiling, a cover to surround the shaft, a main blade having a blade hole which is a space open inward, and a sub-blade positioned in the blade hole. The ceiling fan may resolve the red zone of the air flow and may improve air volume and the flow rate due to the dual blades.