Handheld Blower Handle Layout for Reduced Fatigue and Higher Airflow
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current handheld garden blowers face issues with weight and comfort due to large battery packs, inflexible operation, exposed motor wires causing reliability problems, and low air flow rates, leading to inefficient blowing and operator fatigue.
Innovation Solution
A handheld blower design with a compact structure, a handle positioned to reduce deflection force, a duct assembly with integrated wire guidance to enhance reliability, and optimized battery capacity, brushless DC motor, and axial fan parameters for improved air flow 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 extended, but the weight and size of the battery pack increase, decreasing 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 (e.g., 18V 2.0Ah or 18V 2.5Ah specifications), the design extends operational endurance while controlling the weight increase to maintain acceptable handling comfort for garden blower applications
2Duration of action of moving object
If the battery pack size is increased to ensure endurance, then the working time is extended, but the size of the handheld blower increases, decreasing handling comfort
Solution Approach 1:
The patent optimizes the battery pack physical dimensions and capacity parameters to achieve a balance between working time and compactness. By selecting appropriate battery specifications and optimizing its housing design, the system extends operational endurance while controlling the size increase to maintain a compact, handleable form factor for garden blower applications
3Device complexity
If the motor wires are exposed in the airflow directly, then the structure is simple, but the reliability is weak and air may tear out the wires during high-speed operation
Solution Approach 1:
The patent introduces an intermediary component (wire protection sleeve or shielding structure) between the motor wires and the high-speed airflow. This intermediary element protects the wires from being torn out during high-speed operation while adding minimal structural complexity, thus improving reliability without significantly complicating the design
4Reliability
If a fixation tool for installing the wires is arranged in the duct, then the wire fixing and protection is facilitated, but the cost increases and air resistance increases reducing blowing efficiency
Solution Approach 1:
The patent merges the wire fixation function with the existing duct structure by integrating wire clamps or retention features directly into the duct assembly. This integration approach secures the motor wires reliably within the duct while minimizing additional components that would increase cost and air resistance, thus protecting blowing efficiency
5Productivity
If the blower operates at maximum speed to blow plenty of fallen leaves, then the blowing capacity increases, but the operator needs to use two hands and press boost button, causing fatigue during long time operation
Solution Approach 1:
The patent implements a trigger-activated switch mechanism where the operator's natural gripping action on the handle automatically activates the motor. This self-service design eliminates the need for a separate boost button operation, allowing continuous maximum speed operation with minimal hand movement and reducing operator fatigue during extended 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 enhances handling comfort, reduces operator fatigue, increases air flow rate, and extends working time while maintaining a compact and lightweight form, achieving higher blowing efficiency and reliability.
Implementation Method 1
a drive unit comprising a brushless DC motor
Implementation Method 2
an axial fan, the axial fan being provided with a hub and a plurality of blades radially distributed on the hub
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.