Double-Layer Ceiling Fan Blades for Airflow and Cost Reduction
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Solution Overview
Problem
Conventional dual-motor ceiling fans are complex, expensive, and inefficient in generating wind volume due to reverse blade rotation, which offsets air current and increases costs.
Innovation Solution
A ceiling fan design featuring double-layer blades with a motor unit, blade frame unit, and two sets of blades that form casings to surround the motor, eliminating the need for a motor housing and enhancing air current generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a dual-motor ceiling fan structure is used to increase air current, then the cooling effect is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines two blade units into a single integrated structure where the first and second blade units are mounted on the same motor shaft. This merging approach achieves the dual-layer blade configuration that increases air current without requiring two separate motors, thus resolving the contradiction between productivity improvement and device complexity reduction
Solution Approach 2:
The patent introduces a vertical dimension by stacking blade units at different heights (first blade unit at upper level, second blade unit at lower level). This multi-level arrangement increases the effective air displacement volume and cooling efficiency without adding horizontal complexity through multiple motors
2Productivity
If a dual-motor ceiling fan structure is used to increase air current, then the cooling effect is improved, but the manufacturing and installation cost increase
Solution Approach 1:
The patent merges the function of two motors into a single motor that drives both blade units through a common shaft. This reduces component count, simplifies manufacturing processes, lowers material costs, and reduces installation complexity while maintaining the dual-layer blade configuration for enhanced air current
Solution Approach 2:
The single motor in the patent performs the multi-function of what would traditionally require two motors, driving both the first and second blade units. This universal approach reduces manufacturing and installation costs while achieving the desired increased air current through the multi-layer blade design
3Ease of operation
If reverse rotation of blades is used in dual-motor ceiling fan, then the blade rotation is optimized, but the air current is offset and wind volume decreases
Solution Approach 1:
The patent employs asymmetric blade designs where the first and second blade units have different configurations optimized for their respective positions and rotation directions. This asymmetric design ensures that both blade units contribute constructively to air current generation rather than offsetting each other, resolving the contradiction between rotation optimization and wind volume generation
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 reduces costs and installation expenses while increasing air current for cooling by eliminating the need for a motor housing and optimizing blade arrangement for improved airflow.
Implementation Method 1
The motor unit includes a motor. The motor has a rotating component.
Implementation Method 2
The first extension walls of the first blades surround an outside of the blade frame body to collectively form a first casing. The second extension walls of the second blades surround the outside of the blade frame body to collectively form a second casing.
Data Source
AI summary
A ceiling fan having double-layer blades includes a motor unit, a blade frame unit, a first blade unit, and a second blade unit. The blade frame unit has a blade frame body. The first blade unit includes a plurality of first blades. The second blade unit includes a plurality of second blades. The first blades and the second blades surround the outside of the blade frame body, so that there is no need for the motor unit to provide a motor housing for connecting the first blades and the second blades, thereby saving costs and installation costs. With the arrangement of the first blades and the second blades, the ceiling fan can increase the current of air for cooling.