Ceiling Fan Adapter Assembly Venturi Airflow Control
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Solution Overview
Problem
Thermal stratification in buildings leads to significant energy waste due to temperature differentials between the floor and ceiling, causing overheating or overcooling, especially in high-ceiling spaces, as existing solutions fail to effectively address vertical air movement and energy efficiency.
Innovation Solution
A ceiling fan adapter assembly with a shroud and directing grid that creates a Venturi effect to enhance airflow by reducing the cross-sectional area, comprising intersecting members and a mounting assembly to support the shroud radially outward from the fan blades, and optionally a radial spacer ring assembly for smaller fans, enhancing airflow velocity and mixing air from the ceiling with floor-level air.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a ceiling fan is used without a shroud and directing grid, then the device complexity is low, but the vertical air movement capability is insufficient to effectively reduce thermal stratification
Solution Approach 1:
The directing grid is divided into multiple intersecting members that segment the airflow into controlled paths, creating multiple venturi channels that collectively enhance vertical air movement while distributing the structural load
Solution Approach 2:
The shroud acts as an intermediary component that captures and directs airflow from the fan blades into the directing grid, while the directing grid serves as a second intermediary that further channels the air downward, creating a staged flow control system
2Speed
If the cross-sectional flow area is reduced to create venturi effect, then the airflow velocity increases, but the flow area decreases
Solution Approach 1:
The directing grid members are positioned at specific intervals and angles to create progressive narrowing of the flow channel, transforming the airflow parameters through controlled geometric changes that maximize velocity while maintaining adequate flow area
Solution Approach 2:
The intersecting members of the directing grid create three-dimensional flow channels that narrow in the vertical dimension while expanding in horizontal dimensions, allowing velocity increase through one dimensional reduction while compensating with dimensional expansion in other directions
3Productivity
If the shroud is positioned radially outwardly from the fan blades, then the airflow capture is improved, but the device complexity increases
Solution Approach 1:
The shroud structure serves multiple functions simultaneously: it acts as a flow capture device, a structural support for the directing grid, and a radial positioning element that aligns the entire assembly with the fan blades, reducing the need for separate components
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 solution achieves a 30% reduction in energy consumption while heating and a 20% reduction while cooling by continuously cycling air to eliminate temperature stratification, improving energy efficiency in buildings.
Implementation Method 1
the directing grid comprising a plurality of intersecting members to reduce cross-sectional flow area creating a venturi effect
Data Source
AI summary
A ceiling fan adapter assembly for enhancing the airflow of a ceiling fan within a space. Generally, the ceiling fan adapter assembly includes a shroud; a directing grid attached to the shroud at a lower end thereof, the directing grid comprising a plurality of intersecting members to reduce cross-sectional flow area, creating a venturi effect; and a mounting assembly for supporting the shroud radially outward from the plurality of fan blades.