Fan Assembly With Rotating Handle for Low-Noise Airflow
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Solution Overview
Problem
Existing fan designs lack ergonomic and functional enhancements for user convenience and efficiency, particularly in terms of handle design, battery placement, and airflow optimization.
Innovation Solution
A fan assembly with a rotatable handle, integrated battery receptacle, and optimized airflow path, featuring a rotating handle structure, a battery receptacle assembly, and a specific ratio between fan blade trailing edges and rear grill to reduce noise and enhance airflow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed handle design is used, then the structure is simple, but user handling convenience is poor
Solution Approach 1:
The handle structure is designed to be rotatable rather than fixed, allowing it to change position dynamically. The handle can rotate between a first position (extending from the side) and a second position (extending from the top), enabling users to grip the device from different orientations for improved handling convenience during transport and operation.
2Ease of operation
If the battery receptacle is positioned far from the rotation axis, then battery access is easier, but the center of gravity shifts affecting stability
Solution Approach 1:
The battery receptacle is positioned in the downward direction from the rotation axis, creating a localized weight distribution that lowers the center of gravity. This strategic placement provides stable battery access while maintaining device stability through optimized weight distribution near the base of the device.
3Productivity
If fan blades are positioned close to the rear grill, then the device is compact, but noise increases and airflow efficiency decreases
Solution Approach 1:
The design specifies that the minimum distance between the trailing edge of each fan blade and the rear grill is greater than 10% of the fan diameter. This parameter change optimizes the airflow path, reducing turbulence and noise while improving overall airflow efficiency, with the rear grill positioned to create an optimized flow path without excessive device elongation.
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 design provides improved user handling, reduced noise, and enhanced airflow performance through ergonomic handle rotation, efficient battery access, and optimized airflow path.
Implementation Method 1
a plurality of fan blades coupled to the output shaft and configured to be rotated by the output shaft when the motor is actuated to generate airflow
Data Source
AI summary
A fan assembly includes a motor having an output shaft that defines a rotation axis, a plurality of fan blades coupled to the output shaft and configured to be rotated by the output shaft when the motor is actuated to generate airflow, a fan shroud surrounding the plurality of fan blades, and a handle disposed on the fan shroud. The handle comprises a base and a rotating handle structure rotatable about the base. The base includes a first gripping portion configured to be gripped by a user, and the rotating handle structure includes a second gripping portion configured to be gripped by the user.