Handheld Blower Handle Layout for One-Handed Airflow Endurance
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Solution Overview
Problem
Current handheld garden blowers face issues with weight and size due to large battery packs, leading to reduced comfort and efficiency, and often require two-handed operation with low airflow rates and short working times, while existing wire fixation methods compromise reliability and efficiency.
Innovation Solution
A handheld blower design with a compact structure, a handle positioned to reduce operator fatigue, a brushless DC motor, and an optimized axial fan with improved air passage design, along with a battery capacity range of 170 Wh to 400 Wh, allowing one-handed operation and increased airflow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the capacity of the battery pack is increased to ensure endurance, then the working time is improved, but the weight and size of the handheld blower are increased, reducing handling comfort
Solution Approach 1:
The patent optimizes the battery capacity within a specific range (170-400Wh) rather than continuously increasing it. This parameter optimization achieves the balance between working time and weight by selecting the most appropriate capacity value based on actual operational needs, avoiding excessive weight while ensuring sufficient endurance.
2Duration of action of moving object
If the battery pack size is increased to ensure endurance, then the working time is improved, but the size of the handheld blower is increased, reducing handling comfort
Solution Approach 1:
The patent specifies an optimized battery capacity range (170-400Wh) that provides sufficient working time without excessive size increase. This parameter optimization ensures the battery pack maintains appropriate dimensions for handheld operation while delivering adequate endurance performance.
3Productivity
If the blower operates at maximum speed to blow heavy garbage, then the blowing efficiency is improved, but the operator needs to press a boost button requiring two-handed operation, increasing operation complexity
Solution Approach 1:
The brushless DC motor automatically adjusts its operating parameters based on the load requirements. When heavy garbage is detected, the motor self-adjusts to provide maximum blowing power without requiring manual intervention or a boost button, enabling effective one-handed operation while maintaining high productivity when needed.
4Device complexity
If wires are exposed in the airflow directly for motor connection, then the device complexity is reduced, but the reliability is weakened and air resistance increases
Solution Approach 1:
The motor conducting wires are nested within the airflow passage structure rather than being exposed externally. The wires are routed through channels or cavities integrated into the housing and duct assembly, protecting them from airflow forces while minimizing additional air resistance compared to external routing.
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
Enhances handling comfort, reduces operator fatigue, and achieves higher airflow rates and longer working times, while maintaining a compact and lightweight design, improving overall blowing efficiency.
Implementation Method 1
a brushless DC motor
Implementation Method 2
an optimized axial fan with improved air passage design
Implementation Method 3
a battery capacity range of 170 Wh to 400 Wh
Data Source
AI summary
A handheld blower includes a housing having an air inlet and a duct assembly mounted in front of the air inlet, the duct assembly including a duct connected with the housing, a motor and a fan mounted in the duct, a battery, and a blowpipe connected to the housing by the duct assembly, the blowpipe defining a central axis in the length direction, and a handle arranged above the housing and the battery. The handle includes a gripping portion arranged on opposite sides of a plane in which the gravity center of the blower is located, and the plane is parallel to a central axis of the blowpipe and substantially perpendicular to a working ground. The gravity center of the handheld blower is adjacent to the gripping portion which enhances the handling comfort and reduces operator fatigue during long times of operation.