Handheld Blower Handle Layout for Balance and Airflow
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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 have design limitations that increase air resistance and operator fatigue, especially when trying to achieve high airflow rates for blowing leaves and heavy garbage.
Innovation Solution
A handheld blower design with a compact structure, a handle positioned to reduce deflection force, a duct assembly that securely fixes motor wires without increasing air resistance, and optimized battery capacity, motor, and fan parameters to enhance airflow rate and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the battery pack capacity is increased to ensure endurance, then the working time is improved, but the weight and size of the handheld blower increase, reducing handling comfort
Solution Approach 1:
The patent optimizes the battery pack capacity parameters to achieve a balance between working time and weight. By carefully selecting the battery capacity (not excessively large), the design achieves adequate endurance while controlling the overall weight to maintain handling comfort during operation.
2Reliability
If fixation tools are added to secure motor wires in the duct, then wire reliability is improved, but air resistance increases and blowing efficiency decreases
Solution Approach 1:
The patent integrates the wire fixation function into the existing duct structure itself. The duct is designed with features that simultaneously serve as both the air passage and the wire securing mechanism, eliminating the need for separate fixation tools that would increase air resistance and reduce blowing efficiency.
Solution Approach 2:
The duct structure is designed to automatically secure the motor wires through its own geometric features or integrated elements, without requiring additional fixation components. The duct itself provides the securing function as part of its primary structure, avoiding extra parts that would interfere with airflow.
3Ease of operation
If the handle is positioned to reduce deflection force, then handling comfort is improved, but the structure becomes more complex
Solution Approach 1:
The patent employs asymmetric positioning of the handle relative to the device body, placing it at a specific offset that creates a more favorable center of gravity distribution. This asymmetric arrangement reduces deflection forces during operation by optimizing the leverage and balance points, while the complexity is managed through straightforward structural implementation.
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 achieves higher airflow rates and longer operation times while maintaining a compact and lightweight form, ensuring efficient blowing performance.
Implementation Method 1
the fan, and a housing, wherein the air passage is defined between the fan and 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.