Coreless Donut Fan With Through Hole for Smooth Airflow
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Solution Overview
Problem
Conventional fans experience a 'wind barrier' phenomenon at high speeds, leading to obstructed air flow, increased power consumption, and rotational noise due to wind resistance on the motor and wings.
Innovation Solution
A coreless donut-type motor fan design with a through hole in the central portion and radially arranged coils, where the rotating force is generated by repulsive and attractive forces between magnet plates and coils, eliminating the need for a central motor and allowing smooth air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a motor is provided in the central portion to drive wings at high speed, then rotational power is sufficient, but wind resistance is applied to the motor and wings causing air flow obstruction
Solution Approach 1:
The motor is extracted from the central portion of the fan, removing the source of wind resistance. Instead, a coreless motor structure is used where the rotating body (wings) directly interact with the magnetic field generated by the coil plate, eliminating the need for a separate motor housing in the airflow path.
Solution Approach 2:
The conventional mechanical motor system is replaced with an electromagnetic direct-drive system. The coil plate generates a rotating magnetic field that directly induces rotational force on the guide wings without mechanical transmission components, eliminating the motor housing that caused wind resistance.
2Speed
If a motor is provided in the central portion to drive wings at high speed, then rotational power is sufficient, but power consumption increases due to forced driving
Solution Approach 1:
The electromagnetic coreless motor system replaces the conventional mechanical motor, eliminating energy losses associated with mechanical transmission, friction, and forced driving. The direct electromagnetic induction on the guide wings reduces power consumption while maintaining high-speed rotation capability.
3Speed
If a motor is provided in the central portion to drive wings at high speed, then rotational power is sufficient, but rotational noise is generated due to forced driving
Solution Approach 1:
The motor housing and mechanical transmission components that generate noise are extracted from the system. The coreless electromagnetic motor structure eliminates mechanical friction, bearing noise, and forced driving vibrations, resulting in significantly reduced rotational noise.
4Power
If a motor is provided in the central portion to drive wings, then rotational power is sufficient, but device complexity increases due to separate motor and coupling means
Solution Approach 1:
The motor function and the wing rotation function are merged into a single integrated coreless motor structure. The guide wings directly interact with the magnetic field of the coil plate, eliminating the need for separate motor housings, shafts, and coupling mechanisms, thereby reducing structural complexity.
Solution Approach 2:
The guide wings serve dual functions: they act as both the aerodynamic elements for air movement and as the rotor components of the motor. This multi-functionality eliminates the need for separate motor components, simplifying the overall structure.
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 prevents the 'wind barrier' phenomenon, reduces power consumption, minimizes noise, and enhances rotational efficiency by allowing smooth air flow and self-rotation of the wings without a separate motor.
Implementation Method 1
a tubular coil plate extending from the vertical portion at a position spaced apart inward from the horizontal portion and including a plurality of coils radially formed on inner and outer sides of the tubular coil plate
Implementation Method 2
magnet bodies respectively formed on facing surfaces of the first magnet plate and the second magnet plate
Data Source
AI summary
The present invention relates to a coreless donut-type fan, and more particularly, to a coreless donut-type motor fan for ventilation and cooling, in which a rotating force is generated by wings themselves, without a separate rotational power such as a motor provided in a central portion thereof, and a through hole is formed in the central portion thereof to prevent a “wind barrier” phenomenon during rotation at a high speed, thereby maintaining smooth air flow, minimizing power consumption, in particular, preventing rotational noise due to induction of smooth rotation, and improving rotational efficiency.