Handheld Blower Linear Air Duct Battery Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current handheld blowers with curved air ducts suffer from reduced air flow speed due to the curved shape, which affects the blowing efficiency and cannot meet the requirements of high air flow rate and extended usage time with their small battery capacity.
Innovation Solution
The design includes a linear air duct extending along the central axis with a coupling portion for the battery pack and a connection portion that creates an air intake space, optimizing the axial fan and motor parameters, and improving the air passage design to enhance air flow rate and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a curved air duct is used to assemble the battery pack and gripping portion, then the blower can accommodate larger battery capacity, but the air flow speed is reduced
Solution Approach 1:
The air duct is divided into multiple sections: a straight air duct portion for maintaining high air flow speed, and a separate connection portion for accommodating the battery pack. This segmentation allows the air duct to have a linear structure for optimal airflow while still providing space for the battery pack through the connection portion, thus resolving the contradiction between usage time and air flow speed.
2Power
If a bigger battery pack is used to improve power and extend usage time, then the power and usage time are improved, but the air duct requires a curved shape which reduces air flow speed
Solution Approach 1:
The connection portion is designed to extend in a direction substantially perpendicular to the middle plane of the gripping portion, utilizing three-dimensional space efficiently. This allows the battery pack to be positioned in a different spatial dimension relative to the linear air duct, eliminating the need for curved air duct design while accommodating larger battery capacity for improved power and usage time.
3Speed
If a linear air duct is used to maintain high air flow speed, then the air flow speed is improved, but it becomes difficult to assemble the battery pack and gripping portion
Solution Approach 1:
The air duct is segmented into an air duct portion and a connection portion. The air duct portion maintains a linear structure for high air flow speed, while the connection portion is designed separately to facilitate assembly of the battery pack. This segmentation resolves the contradiction by allowing each component to be optimized independently for its specific function.
Solution Approach 2:
The connection portion acts as an intermediary component that bridges the linear air duct portion and the battery pack assembly. It provides the necessary connection functionality while accommodating the battery pack without requiring the main air duct to be curved, thus maintaining both assembly ease and high air flow speed.
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
This configuration achieves a higher air flow rate and longer usage time, meeting the requirements of over 395 cfm and up to 75 minutes, while maintaining a comfortable and lightweight design.
Implementation Method 1
axial type blowers can generate greater air quantity
Implementation Method 2
a motor for driving the fan to rotate about a central axis
Data Source
AI summary
A handheld blower includes a fan for generating an air flow, a motor for driving the fan to rotate about a central axis, a battery pack for supplying power to the motor, an air duct portion including an air duct, the air duct extending long the central axis, a coupling portion for coupling with the battery pack, and a connection portion for connecting the air duct portion with the coupling portion. The fan is received in the air duct. The air duct includes an air duct inlet and an air duct outlet which are respectively located at the two ends of the air duct. The air duct inlet is located between the air duct outlet and the coupling portion. The connection portion is provided with an air intake space located between the air duct inlet and the coupling portion. The air intake space is opened in a radial direction of the central axis.