Ceiling Fan Upper Body Cover Water Deflection
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Solution Overview
Problem
Conventional ceiling fans are prone to short circuits and current leakage due to water spillage, as water can run down the suspending unit and enter the motor through openings in the upper body cover, particularly in multi-family buildings.
Innovation Solution
The ceiling fan design incorporates an upper body cover with a rotating configuration and a vertical first wall between the central opening and second openings, utilizing centrifugal force to deflect water droplets outward and upward, reducing the amount of water that enters the motor through these openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the upper body cover has second openings for heat dissipation, then the motor temperature is reduced, but water can enter the motor through these openings causing short circuits
Solution Approach 1:
The upper body cover is segmented into multiple functional zones: the first wall creates a water-deflecting barrier section, while the second openings provide heat dissipation pathways. This segmentation allows the cover to simultaneously perform heat dissipation and water protection functions by dividing the structure into distinct operational regions.
Solution Approach 2:
The first wall acts as an intermediary element between the incoming water droplets and the motor. It intercepts and deflects water away from the motor through centrifugal force, serving as a protective mediator that allows the second openings to remain open for heat dissipation without compromising electrical safety.
2Device complexity
If the upper body cover is stationary, then the structure is simple, but water droplets can directly enter the motor through the openings
Solution Approach 1:
The upper body cover is designed to rotate together with the blades, transforming from a static structure to a dynamic one. This rotation generates centrifugal force that actively deflects water droplets away from the motor through the first wall, providing active water protection while maintaining structural simplicity.
Solution Approach 2:
The rotating upper body cover utilizes the natural centrifugal force generated by its own rotation to deflect water droplets. The system serves its own protection function by using its rotational motion to create the necessary centrifugal force, eliminating the need for additional active water deflection mechanisms.
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
This design effectively prevents water from entering the motor, thereby enhancing safety by minimizing the risk of short circuits and current leakage.
Implementation Method 1
the water droplets are forced outward along the upper surface of the upper body cover by the centrifugal force generated by the rotation of the upper body cover
Data Source
AI summary
A ceiling fan includes a suspending unit and a ceiling fan body. The ceiling fan body includes a shaft; a motor; a plurality of blades; an upper body cover having a first opening, at a central part, for passing the shaft therethrough, and a second opening outside the first opening; and a lower body cover. The upper body cover rotates with the blades and has a first wall standing vertically between the first opening and the second opening.