Blower Dual Duct Air Intake for Efficiency
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Solution Overview
Problem
The air intake performance of garden blowers is limited, posing a challenge to improve blowing efficiency while maintaining user safety and avoiding increased weight, which complicates the design of enhancing air intake without compromising the blower's strength and usability.
Innovation Solution
The blower design incorporates a housing assembly with an inner and outer duct system, where the outer air inlet is strategically positioned to increase airflow intake area, and the fan configuration includes optimized fan blades and a power supply system to enhance air intake efficiency and reduce noise and wind resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the air intake area is increased to improve blowing efficiency, then the blowing efficiency is improved, but the weight of the whole machine increases
Solution Approach 1:
The inner duct is nested within the outer duct assembly, with the inner air inlet positioned between the front end portion and rear end portion of the outer air inlet along the first axis. This nested configuration allows dual air intake paths without proportionally increasing overall weight, as the inner duct utilizes the space within the outer duct structure.
Solution Approach 2:
The outer air inlet is designed with both a front end portion and a rear end portion along the direction of the first axis, creating a multi-dimensional air intake approach. The inner air inlet is positioned between these portions, effectively utilizing axial spacing to maximize air intake area without requiring proportional increases in structural weight.
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 design improves blowing efficiency, reduces weight, and enhances user convenience by increasing air intake area and volume while minimizing noise and wind resistance, thus addressing the limitations of existing blower designs.
Implementation Method 1
a fan (120), where the fan (120) is driven by the motor (110) to rotate about a first axis (101)
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A blower includes a motor, a fan driven by the motor to rotate about a first axis, a power supply device, and a housing assembly accommodating the motor and including an inner duct and an outer duct assembly. The inner duct is formed with an inner air inlet. The outer duct assembly surrounds the inner duct. The outer duct assembly includes an outer duct and a hood, where the outer duct is disposed on a front side of the hood, an outer air outlet is formed at an end of the outer duct facing away from the hood, an outer air inlet is formed on the hood and has a front end portion and a rear end portion along a direction of the first axis, and the inner air inlet is disposed between the front end portion and the rear end portion along the direction of the first axis.