Backpack Blower Layout With Rear Volute for Higher Air Intake
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Solution Overview
Problem
Conventional gas-powered backpack blowers emit undesirable emissions, require frequent fuel refills, and have limited air intake due to fan positioning, which affects efficiency and user comfort, especially in battery-powered models where component balance is crucial.
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, featuring a back support assembly and volute configuration that optimizes airflow and weight distribution.
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 efficiency
Solution Approach 1:
The volute assembly is repositioned to the rear of the blower instead of the side, utilizing the depth dimension (front-to-back) rather than the width dimension. This allows the air intake to face rearward with unobstructed access, dramatically increasing the effective intake area without expanding the blower's width or overall compact footprint.
2Volume of moving object
If the battery is positioned in the housing assembly, then the blower can be compact, but the weight distribution may cause physical strain on the user
Solution Approach 1:
The housing assembly containing the battery is strategically positioned to balance the weight distribution of the entire blower system. By placing the heavy battery-containing housing in a specific location relative to other components, the design creates a balanced center of gravity that reduces torque forces and physical strain on the user's back during operation.
3Power
If gas-powered blowers are used, then high power is achieved, but emissions are released into the environment
Solution Approach 1:
The internal combustion engine (mechanical/chemical system producing emissions) is replaced with an electric motor (electrical system). The motor assembly receives electrical power from the battery and drives the fan through a belt drive system, eliminating combustion and associated emissions while maintaining the mechanical function of air movement.
4Duration of action of moving object
If gas-powered blowers are used, then continuous operation is achieved, but frequent fuel refilling is required
Solution Approach 1:
The battery-powered system provides autonomous operation without requiring external fuel refilling. The battery serves as a self-contained energy source that can be recharged, eliminating the need for users to repeatedly stop operation to refill fuel tanks, thus reducing downtime and increasing continuous operational capability.
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 airflow efficiency, and minimizes environmental impact by eliminating emissions, while maintaining a compact and balanced configuration for enhanced performance.
Implementation Method 1
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.