Backpack Blower Axial Fan and Segmented Battery for Arm Load Reduction
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Solution Overview
Problem
Existing professional backpack blowers are heavy due to large-capacity battery packs, generate high noise and vibration, and are difficult to clean, posing challenges for workers and the environment.
Innovation Solution
A backpack blower system with a battery pack and power assembly carried on the body via a backpack assembly, using an axial fan assembly and control handle assembly for adjustable speed and power control, reducing arm load, noise, and vibration, and incorporating a blowpipe component for efficient air flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a large-capacity battery pack is used to increase discharging time, then the power and duration are improved, but the total weight of the blower increases, causing high load on the worker's arm
Solution Approach 1:
The patent divides the power system into modular battery packs that can be externally attached to the backpack blower. The battery packs are separate from the main blower body, allowing workers to attach only the necessary capacity for each task. This segmentation enables flexible configuration where multiple smaller battery packs can be used instead of one large heavy pack, reducing the perceived weight burden while maintaining required duration.
2Power
If gasoline powered centrifugal air passages are used, then high power is achieved, but high noise and strong vibration are generated
Solution Approach 1:
The patent replaces the gasoline-powered centrifugal fan system with an electric axial fan system. The axial fan design inherently produces lower noise and vibration compared to centrifugal designs. Additionally, the electric motor provides smoother operation without the combustion-related vibrations and noise of gasoline engines, directly addressing the harmful factors while maintaining blower power.
3Power
If gasoline powered centrifugal air passages are used, then high power is achieved, but the environment is polluted
Solution Approach 1:
The patent substitutes the internal combustion engine with an electric motor system. This replacement eliminates exhaust emissions entirely, as the electric motor draws power from battery packs rather than burning gasoline. The axial fan design also improves energy efficiency, reducing overall power consumption and extending battery operation time without requiring additional emissions-producing power sources.
4Power
If existing professional backpack blowers are used, then high power is achieved, but they are difficult to clean during work
Solution Approach 1:
The patent employs an axial fan design with a simplified, more open air passage structure compared to centrifugal systems. The axial configuration allows for easier access to internal components and creates fewer tight corners and complex passages where debris can accumulate. This segmented, simplified architecture enables workers to quickly remove and clean components during field operations without disassembling complex 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
The system reduces the load on the worker's arm, minimizes noise and vibration, and allows for easy control of air flow for effective clearing of debris, while being environmentally friendly and easy to clean.
Implementation Method 1
a power assembly electrically connected with the battery pack for converting the electric energy provided by the battery pack into mechanical energy
Data Source
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AI summary
A backpack tool, a backpack blower and a control handle assembly are provided by the present invention. The backpack tool includes a battery pack for providing electric energy, a power assembly electrically connected with the battery pack to convert the electric energy provided by the battery pack into mechanical energy, and a backpack assembly carried on human back to support the battery pack and the power assembly. Both battery pack and the power assembly can be carried on human back through the backpack assembly, so that the force loaded by arms of the worker can be reduced. The battery pack serves as a power source can reduce the noise and vibration caused by the backpack toll during working as compared with the gasoline powered backpack tool.