Offset-Motor Axial Blower Vacuum for Unobstructed Airflow
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Solution Overview
Problem
The in-line motor design in axial blower vacuums obstructs air flow, leading to reduced airflow efficiency and speed compared to designs with a motor radially offset from the fan blade assembly.
Innovation Solution
The axial blower vacuum features a motor positioned outside the housing and offset from the fan axis, allowing smoother and faster air flow by eliminating the motor from the direct airflow path, with the fan being rotatable to produce airflow in both directions between the inlet and outlet openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the motor is positioned in-line with the fan blade assembly, then the construction is thinner and smaller, but the air flow is obstructed and efficiency is reduced
Solution Approach 1:
The motor assembly is extracted from the direct airflow path and positioned in a radial offset location relative to the fan blade assembly. This allows the motor to be separated from the air flow path while maintaining functional connection through the drive shaft, thereby eliminating the obstruction problem while preserving the compact construction benefits
2Volume of moving object
If the motor is positioned in-line with the fan blade assembly, then the construction is more compact, but the air flow speed is reduced
Solution Approach 1:
The motor assembly is extracted from the direct airflow path and positioned in a radial offset location relative to the fan blade assembly. This allows the motor to be separated from the air flow path while maintaining functional connection through the drive shaft, thereby eliminating the obstruction problem while preserving the compact construction benefits
3Productivity
If the motor is positioned off-set from the fan blade assembly, then the air flow is smoother and faster, but the construction becomes larger
Solution Approach 1:
The motor assembly is positioned in a radial dimension offset from the fan blade assembly rather than extending the axial length. This dimensional repositioning allows the motor to be located outside the direct airflow path while maintaining a compact overall construction, as the offset is in the radial direction perpendicular to the airflow direction
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 enhances airflow efficiency and speed by ensuring the motor does not obstruct the air flow path, resulting in improved performance and cleaner air flow, maximizing the speed and directionality of air movement.
Implementation Method 1
A motor is operable in a first direction to rotate the fan in a first direction to produce an air flow from the first opening to the second opening
Data Source
AI summary
A blower vacuum includes a housing having a wall that extends between a first opening and a second opening, and a fan positioned at least partially within the housing and rotatable about a fan axis that extends between the first opening and the second opening. A motor is positioned outside of the housing and is rotatable about a motor axis that is offset from the fan axis. The motor is operable in a first direction to rotate the fan in a first direction to produce an air flow from the first opening to the second opening and operable in a second direction to rotate the fan in a second direction to produce an air flow from the second opening to the first opening.