Backpack Blower Layout for Rear Air Intake and Balanced Battery Weight
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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, leading to reduced efficiency and user discomfort due to uneven weight distribution.
Innovation Solution
A battery-powered backpack blower design with a back support assembly, volute assembly, and housing assembly that positions batteries and the motor close to the user's back, optimizing air intake and weight distribution for improved efficiency and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If gas-powered blowers are used, then blowing power is sufficient, but emissions are released into the environment and frequent fuel refills are required
Solution Approach 1:
The patent replaces the internal combustion engine with an electric motor powered by a battery pack, eliminating emissions and fuel refill requirements while maintaining blowing performance through optimized electrical power delivery to the motor
Solution Approach 2:
The patent changes the power source from chemical energy (gasoline) to electrical energy (battery), fundamentally altering the energy parameter to eliminate emissions while maintaining sufficient power output for blowing operations
2Productivity
If the fan air intake is positioned on the side of the blower, then the blower structure is compact, but the air intake vent size is limited reducing flow rate
Solution Approach 1:
The patent repositions the air intake from a side-mounted configuration to a rear-mounted configuration, utilizing the longitudinal dimension of the blower body to accommodate a larger intake area without increasing lateral dimensions, thus maintaining compactness while improving airflow
3Productivity
If the battery is positioned away from the user's back, then air intake is improved, but weight distribution becomes uneven increasing user fatigue
Solution Approach 1:
The patent positions the battery in a specific location within the housing that simultaneously satisfies both air intake requirements and weight distribution needs, creating a locally optimized configuration where the battery is placed in the rear portion of the housing near the user's back to balance weight while allowing sufficient clearance for air flow
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 enhances airflow efficiency, reduces user fatigue by balancing weight, and eliminates the need for frequent fuel refills, providing a more environmentally friendly and efficient cleaning solution.
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.