Handheld Blower Handle Layout for Weight and Airflow Balance
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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, as well as inflexible operation and low airflow rates, which limit their effectiveness in blowing leaves and garbage.
Innovation Solution
A handheld blower design with a compact structure, a handle positioned to reduce operator fatigue, a duct assembly that securely fixes motor wires to prevent damage, and optimized battery capacity, motor, and fan parameters to enhance airflow and efficiency.
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 applies parameter changes by optimizing the battery capacity to a specific range (18V 2.0Ah or 18V 2.5Ah) rather than simply increasing it indefinitely. This balanced parameter selection achieves adequate working time while controlling weight, resolving the contradiction between endurance and handling comfort
2Duration 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 size of the handheld blower is increased
Solution Approach 1:
The patent resolves this contradiction by selecting optimal battery capacity parameters (18V 2.0Ah or 18V 2.5Ah) that provide sufficient working time without excessive size increase. The optimized parameters balance volume constraints with endurance requirements
3Device complexity
If the conducting wires are exposed in the airflow directly to simplify structure, then the device complexity is reduced, but the reliability is weakened and air resistance is increased
Solution Approach 1:
The patent introduces a wire protection component as an intermediary element between the conducting wires and the airflow. This component protects the wires from damage and reduces air resistance without significantly increasing overall device complexity, resolving the contradiction between simplicity and reliability
4Stability of the object's composition
If the handle is positioned far from the gravity center to provide better control, then the control stability is improved, but the operator needs to provide additional force to overcome deflection, causing hand pain
Solution Approach 1:
The patent applies asymmetry by positioning the handle offset from the gravity center rather than symmetrically. This asymmetric positioning provides sufficient control stability while minimizing the deflection moment, thereby reducing operator fatigue and hand pain during prolonged use
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 handling comfort, reduces operator fatigue, and increases airflow rate and efficiency, allowing for longer operation times while maintaining a compact and lightweight form.
Implementation Method 1
a fan mounted in the duct
Implementation Method 2
a battery mounted on the housing
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.