Lightweight Axial Blower Layout for High Airflow Control
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Solution Overview
Problem
Existing blowers are heavy due to large motors, making them difficult to maneuver despite providing high airflow rates and airflow forces.
Innovation Solution
A blower design with a motor-driven axial fan, a handle positioned below the airflow passageway, and control circuitry offset from the handle, allowing for lightweight construction and easy maneuverability while maintaining high performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If large motors with heavy components are used to generate high airflow rates, then airflow performance is improved, but blower weight increases making it difficult to maneuver
Solution Approach 1:
The blower is divided into modular components including a handle assembly, motor housing, and interchangeable extension tubes. This segmentation allows the main body to remain lightweight while airflow performance is optimized through the modular configuration and selective addition of extension tubes for different applications.
Solution Approach 2:
The patent extends the airflow path in the longitudinal dimension by adding interchangeable extension tubes of various lengths. This dimensional extension increases the effective airflow distance and coverage area without requiring a proportional increase in motor size or weight, thus improving productivity without linearly increasing weight.
2Productivity
If the passageway length is increased to improve airflow performance, then airflow rate is improved, but the blower becomes longer and less maneuverable
Solution Approach 1:
The passageway is segmented into a base unit and interchangeable extension tubes. Users can configure the total passageway length based on specific application needs, allowing optimization of airflow performance while maintaining maneuverability when shorter configurations are sufficient.
Solution Approach 2:
The passageway configuration is made dynamic and adjustable rather than fixed. The interchangeable extension tubes allow the system to adapt its length to different工作任务, providing long passageway when high airflow distance is needed and short passageway when maneuverability is the priority.
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 blower achieves high airflow rates and forces with a weight less than 1000 grams, offering ease of use and maneuverability, with airflow rates of at least 5.88 cubic meters per minute and a flow rate to weight efficiency of at least 5.88 m3/(kg*min).
Implementation Method 1
a sensor that detects a position of the trigger
Implementation Method 2
a motor disposed in the passageway and operably coupled to a fan... the control circuitry controls a speed of the motor based on information from the sensor
Implementation Method 3
a passageway for directing airflow from an air inlet to a front end of the blower
Data Source
AI summary
A blower including: a passageway for directing airflow from an air inlet to a front end of the blower, the passageway having a variable length; a motor disposed in the passageway and operably coupled to a fan, a handle disposed below the passageway, wherein the handle comprises a trigger that receives a user input and a sensor that detects a position of the trigger; and a control circuitry in communication with the motor and the sensor, wherein the control circuitry controls a speed of the motor based on information from the sensor, wherein the length of the passageway between the air inlet and air outlet is greater than or equal to 12 inches.