Centrifugal Ceiling Fan Airflow Split for Even Ventilation and Heating
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Solution Overview
Problem
Conventional axial ceiling fans suffer from uneven air distribution, space occupancy, and safety concerns due to exposed paddles, with previous solutions either neglecting air distribution or increasing energy consumption and noise.
Innovation Solution
A centrifugal ceiling fan design featuring a casing with an air inlet and outlet passages, a central dome for airflow regulation, and a propeller with curved blades to distribute air in all directions, including a heating element and air filter, and a wireless control system for efficient, safe, and even ventilation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If axial fans with vertically mounted paddles are used, then air can be pushed downward, but the area outside the radius of the paddles remains unventilated resulting in uneven air distribution
Solution Approach 1:
The patent inverts the conventional axial fan design by using a centrifugal propeller that pushes air outward radially instead of downward axially. This inversion allows air to be distributed evenly across the entire room including areas outside the traditional paddle radius, achieving uniform air distribution throughout the space.
Solution Approach 2:
The patent transitions from one-dimensional axial air movement to three-dimensional centrifugal air distribution. The propeller design creates radial airflow patterns that extend air distribution in multiple directions simultaneously, covering the entire room volume rather than just a localized downward area.
2Volume of moving object
If paddles are made shorter to reduce space occupancy, then space is reduced, but rotation speed must be increased to maintain ventilation results which increases energy consumption and noise
Solution Approach 1:
The patent employs curved centrifugal propeller blades with optimized aerodynamic profiles that efficiently move air at lower rotation speeds. The curved geometry creates effective centrifugal force and pressure differentials that maintain ventilation performance without requiring high-speed rotation, thereby reducing energy consumption and noise while keeping the fan compact.
3Volume of moving object
If paddles are made shorter to reduce space occupancy, then space is reduced, but rotation speed has to be increased which results in an increase in noise
Solution Approach 1:
The curved centrifugal propeller blades are designed with optimized aerodynamic profiles that minimize turbulence and vortex formation at lower rotation speeds. This curvature optimization reduces air resistance and mechanical vibrations, thereby significantly lowering noise levels while maintaining effective ventilation in a compact form factor.
4Productivity
If conventional axial fans are used, then air can be pushed downward, but safety concerns arise due to exposed paddles rotating
Solution Approach 1:
The patent incorporates a protective cage or housing structure that encloses the centrifugal propeller blades. This protective enclosure allows the fan to maintain its compact design while preventing direct exposure of rotating blades to users, thereby eliminating safety hazards associated with exposed paddles in conventional axial fans.
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 centrifugal ceiling fan achieves efficient, even air distribution and heating, reducing energy consumption and noise while ensuring safety and space efficiency, with the ability to regulate airflow and incorporate a heating element for enhanced room ventilation.
Implementation Method 1
a centrifugal propeller configured to rotate about a rotation axis... rotation of the centrifugal propeller causes air to be received from said air inlet and to be pushed from said air outlet in substantially all directions
Implementation Method 2
a coil provided within the volume to heat the air pushed downward
Data Source
AI summary
A centrifugal ceiling fan adapted to evenly ventilate and heat its surrounding area. The fan comprises a casing defining a top, a side, and a bottom. The air inlet is provided in the top and the air outlet comprises a first passage provided in the side and a second passage provided in the bottom, and a central dome for regulating the flow of air between the first passage and the second passage to a desired proportion. The fan comprises a centrifugal propeller having blades which are curved and have a variable width such that rotation of the centrifugal propeller causes air to be received from said air inlet and to be pushed from said air outlet in substantially all directions between the first direction and the second direction. The dome comprises a heat source for heating air pushed downward from the bottom. Whereby, unheated air is pushed sideways and heated air is pushed downward and for evenly ventilating and heating a room in which the centrifugal ceiling fan is installed.