Blower
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Solution Overview
Problem
The existing blower designs using a single battery suffer from insufficient output and operating time, leading to instability when held due to increased battery size required for capacity improvements.
Innovation Solution
A blower configuration with multiple batteries, a motor, a centrifugal fan, and a volute casing, where the main grip is positioned radially outward to maintain a center of gravity close to the grip, preventing tilting and ensuring stable posture, even with attached accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the capacity of the battery is increased to resolve insufficiency in output or operating time, then the output and operating time are improved, but the size of the battery is increased, resulting in unstable posture of the blower when held
Solution Approach 1:
The power source is divided into multiple batteries (first battery and second battery) instead of using a single large battery. This segmentation allows the blower to achieve the required capacity while distributing the weight to maintain stable posture during operation.
2Power
If the capacity of the battery is increased to resolve insufficiency in output or operating time, then the output and operating time are improved, but the size of the battery is increased, resulting in unstable posture of the blower when held
Solution Approach 1:
The power source is divided into multiple batteries (first battery and second battery) instead of using a single large battery. This segmentation allows the blower to achieve the required capacity while distributing the weight to maintain stable posture during operation.
3Duration of action of moving object
If multiple batteries are used to increase capacity, then output and operating time are improved, but the device complexity increases
Solution Approach 1:
The first battery and second battery are combined in series to provide the required voltage and capacity. This merging approach achieves the desired operating time while keeping the configuration relatively simple and manageable.
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 enhanced output and operating time while maintaining stability during use by distributing the weight of multiple batteries to keep the center of gravity close to the grip, preventing tilting and ensuring efficient air discharge.
Implementation Method 1
The centrifugal fan is configured to rotate about a rotation axis by being driven by the motor and configured to change a flow direction of air from a first direction extending along the rotation axis to a radially outward direction of the rotation axis
Implementation Method 2
The volute casing is configured to guide the air from the centrifugal fan along a circumferential direction of the rotation axis to the discharge port
Data Source
AI summary
A blower may include a plurality of batteries; a centrifugal fan configured to change a flow direction of air from a first direction extending along the rotation axis to a radially outward direction of the rotation axis; a volute casing including a discharge port and configured to guide the air from the centrifugal fan along a circumferential direction of the rotation axis to the discharge port; and a main grip disposed radially outward of the rotation axis and outside of the volute casing and configured to be gripped by an operator. A central axis of the main grip may extend along a reference plane perpendicular to the rotation axis. A distance from the reference plane to a center of gravity of the blower may be less than or equal to 1.5 times a width of the main grip.