Battery-powered backpack blower
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Solution Overview
Problem
Conventional gas-powered backpack blowers face issues with emissions, fuel storage, and limited air intake, which affects their efficiency and user comfort due to the positioning of the fan intake and heavy battery components.
Innovation Solution
A battery-powered backpack blower design with a rear-mounted volute assembly and balanced component placement, including a housing assembly with battery wells positioned centrally to reduce torque forces and enhance air intake efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the fan air intake is positioned on the side of the blower, then the blower can be compact, but the air intake vent size is limited which reduces airflow rate and blower performance
Solution Approach 1:
The volute assembly is positioned at the rear of the blower rather than on the side, utilizing the rear dimension for air intake. This dimensional repositioning allows the air intake to extend rearwardly without increasing the blower's lateral footprint, thereby maintaining compact size while enabling a larger effective air intake area that improves airflow rate and blower performance.
2Productivity
If the battery is positioned to optimize air intake, then airflow efficiency improves, but the center of gravity shifts causing increased physical strain and torque forces on the user
Solution Approach 1:
The housing assembly is designed with balanced component placement where heavier components are positioned to counterbalance each other, achieving an optimized center of gravity. This counterbalancing approach allows the battery to be positioned for optimal airflow efficiency while maintaining user comfort by preventing excessive torque forces and physical strain through proper weight distribution.
3Power
If gas-powered engines are used, then high power output is achieved, but emissions are released into the environment and fuel storage is required
Solution Approach 1:
The internal combustion engine is replaced with an electric motor powered by a battery. This substitution eliminates the mechanical combustion process that generates emissions, while the electric motor provides sufficient power output for blower operations. The battery-powered system removes the need for fuel storage and eliminates harmful emissions into the environment.
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 improves user comfort by reducing physical strain, increases air intake efficiency, and minimizes environmental impact by eliminating the need for gas-powered engines.
Implementation Method 1
The motor assembly is secured to the housing assembly and operatively connected to the fan member
Implementation Method 2
a fan member to generate air flow therethrough
Data Source
AI summary
The battery-powered backpack blower includes a back support assembly including a back plate configured to permit a user to mount the blower to the user's back, and a volute assembly including a first volute portion and a second volute portion. The backpack blower further includes a housing assembly including a battery assembly and a motor assembly therein, the housing assembly is provided intermediate to the back assembly and the volute assembly.