Integrated Magnetic Fan Drive for Quiet Space-Saving Ventilation
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Solution Overview
Problem
Conventional ventilation fans with dedicated motor housings are inefficient and noisy due to the presence of an electric motor, which occupies space and generates noise during operation.
Innovation Solution
The rotor and stator magnets are integrated within the ventilation fan without a dedicated motor housing, allowing for the distribution of these components to drive the fan wheel, enhancing airflow efficiency and reducing noise by eliminating the need for an electric motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated electric motor housing is used to drive the fan wheel, then the fan can achieve reliable rotation, but the device occupies more space and generates more noise
Solution Approach 1:
The patent extracts the electric motor housing from the ventilation fan system, removing the source of noise and excess space occupation. Instead of using a dedicated motor housing, the invention integrates magnetic drive components (rotor magnets on the fan wheel and stator magnets in the housing) to achieve fan wheel rotation without the traditional motor assembly, thereby eliminating the harmful noise and space issues while maintaining reliable operation
Solution Approach 2:
The patent replaces the traditional mechanical electric motor system with a magnetic field-based drive system. By using electromagnetic interaction between rotor and stator magnets instead of a mechanical motor, the system achieves fan wheel rotation without the noise and space requirements of conventional motors, effectively substituting a harmful mechanical system with a cleaner alternative
2Object-affected harmful factors
If rotor and stator magnets are integrated without dedicated motor housing, then noise and space are reduced, but the magnetic field configuration must be precisely controlled
Solution Approach 1:
The fan wheel housing serves multiple functions: it provides structural support for the fan wheel, houses the stator magnets, and guides airflow. This multi-functionality reduces the need for separate dedicated motor housing components, simplifying the overall structure while maintaining effective magnetic field control for noise-free operation
Solution Approach 2:
The patent positions rotor magnets on the fan wheel and stator magnets in the housing at specific locations optimized for magnetic interaction. By carefully configuring the local placement and orientation of magnets, the system achieves effective magnetic drive with controlled field distribution, managing the complexity through strategic local optimization rather than requiring complex overall control 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 configuration increases drive power efficiency and reduces noise, enabling the ventilation fan to operate more quietly and with reduced space requirements.
Implementation Method 1
one or more stator magnets fixed to the fan housing and arranged circumferentially around the rotation axis... produce a magnetic field to cause magnetic interaction with at least one of the plurality of rotor magnets so that the plurality of rotor magnets and the plurality of fan blades rotate about the rotation axis
Data Source
AI summary
A ventilating fan has a fan housing formed to define an interior space, an inlet opening, and an outlet opening spaced apart from the inlet opening, a fan wheel arranged to lie within the interior space, the fan wheel comprising a blade hub and a plurality of fan blades from the blade hub, and a fan-wheel rotation drive assembly configured to rotate the plurality of fan blades about a rotation axis, the fan-wheel rotation drive assembly comprising one or more rotor magnets fixed to the fan wheel and arranged circumferentially around the rotation axis, and one or more stator magnets fixed to the fan housing and arranged circumferentially around the rotation axis.