Portable Blower Guide Tube Layout for Ergonomic Airflow
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Solution Overview
Problem
Existing portable blowers lack ergonomic operation and effective cleaning capabilities due to inefficient airflow resistance and weight distribution, which limits their cleaning performance and user comfort.
Innovation Solution
A portable blower design featuring a separate motor unit and blower unit with a long guide tube for counterbalancing, reducing airflow resistance, and increasing blowing capacity, along with a multi-stage axial fan and detachable blower unit for versatile tool attachments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blower tube is made long to increase blowing capacity, then the blowing capacity is improved, but the resistance to flow increases
Solution Approach 1:
The blower system is divided into separate functional units: a motor unit with drive motor and a blower unit with axial fan, connected via a guide tube. This segmentation allows the blower tube to be optimized for blowing capacity while the guide tube manages airflow transitions, reducing overall flow resistance.
Solution Approach 2:
The guide tube acts as an intermediary component between the motor unit and blower unit, providing a controlled airflow path that reduces turbulence and resistance. The guide tube's design optimizes air flow from the fan into the blower tube, minimizing energy losses.
2Device complexity
If the engine housing is positioned close to the blower unit to reduce device complexity, then the device complexity is reduced, but the intake surface is partially covered increasing resistance to flow
Solution Approach 1:
The housing system is segmented into a separate engine housing and blower housing, connected by the guide tube. This allows the engine housing to be positioned without interfering with the blower unit's intake surface, eliminating flow resistance caused by housing proximity while maintaining manageable device complexity.
3Length of moving object
If the drive motor and blower unit are positioned close together to reduce length, then the length is reduced, but ergonomic operation is compromised due to poor weight distribution
Solution Approach 1:
The guide tube is designed as a counterbalancing element between the heavy drive motor and blower unit. By positioning the guide tube with appropriate length and structural characteristics, the system achieves balanced weight distribution that improves ergonomic operation while maintaining compact overall dimensions.
4Ease of operation
If the guide tube is made long to improve ergonomic operation and reduce flow resistance, then ease of operation and airflow are improved, but the overall device length increases
Solution Approach 1:
The guide tube's dimensional parameters are optimized to achieve the desired balance between ergonomic operation and compact size. By carefully selecting the guide tube length and diameter, the system achieves improved weight distribution and airflow characteristics without excessive overall length increase.
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
Enables ergonomic, energy-efficient operation with improved airflow and increased blowing capacity, allowing for effective cleaning and easy tool fixture integration, while maintaining a compact design.
Implementation Method 1
the axial fan conveys operating air in the direction of the axis of rotation of the axial fan through a blower tube
Implementation Method 2
a drive motor disposed in an engine housing
Data Source
AI summary
A portable blower having a motor unit that includes a drive motor disposed in an engine housing. The blower has a blower unit that is provided with a blower housing that is separate from the engine housing. The blower unit includes an axial fan that is driven by the drive motor via a drive shaft. During operation the axial fan conveys operating air in the direction of the axis of rotation of the axial fan through a blower tube disposed downstream of the axial fan. An ergonomic operation and a good operating result can be achieved if the motor unit includes a guide tube on which is secured at least one handle. The engine housing is disposed at one end of the guide tube and the blower unit is disposed at the other end of the guide tube. The drive shaft extends through the guide tube. The length of the guide tube between the engine housing and the blower unit corresponds to at least half of the length of the blower tube.