Backpack blower and backpack tool system
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backpack blowers face limitations due to battery packs with low output voltage and power insufficiency, which restrict their portability and endurance when used for high-power operations, and the increased weight and size of batteries exacerbate stability issues.
Innovation Solution
A backpack blower design featuring a power supply system with multiple battery packs strategically positioned to balance weight and improve stability, along with a duct assembly and motor configuration that generates high-speed airflow, and a strap assembly that distributes the weight for comfortable carrying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the output voltage of the battery pack is increased by increasing the number of cells, then the power output is improved, but the outer dimension and weight of the battery pack are increased
Solution Approach 1:
The battery pack is divided into multiple individual battery cells (e.g., five 5Ah cells) connected in series, allowing the system to achieve high voltage (e.g., 54.6V) without requiring a single large heavy battery. This segmentation enables flexible configuration to optimize power output while controlling weight.
Solution Approach 2:
The patent changes the electrical parameters by increasing the number of battery cells in series connection to raise the output voltage from conventional levels (e.g., 18V) to higher levels (e.g., 54.6V), thereby improving power output capability for high-power tools while managing the weight through efficient cell selection and arrangement.
2Power
If the output voltage of the battery pack is increased by increasing the number of cells, then the power output is improved, but the outer dimension of the battery pack is increased
Solution Approach 1:
The battery pack is segmented into multiple compact cells arranged in a space-efficient configuration within the backpack housing, allowing high voltage output without proportionally increasing the overall pack dimensions.
Solution Approach 2:
The battery cells are nested within the backpack structure, with the power supply device integrated into the backpack housing, creating a compact layered arrangement that minimizes external dimensions while accommodating multiple cells for high power output.
3Duration of action of moving object
If the weight of the power supply is increased to improve power output, then the power endurance is improved, but the stability and user comfort are worsened
Solution Approach 1:
The backpack design incorporates a balanced weight distribution system where the power supply weight is counterbalanced by the structural framework and positioning of other components (motor, fan, duct), with the center of gravity positioned to maintain stability during operation and prevent excessive strain on the user.
Solution Approach 2:
The center of gravity of the entire backpack system is strategically positioned at a height and location that creates an equipotential balance point, allowing the user to carry the heavy power supply without excessive forward or backward tilt, thereby maintaining operational stability and comfort despite the increased weight for extended endurance.
4Ease of operation
If conventional battery packs are used, then the portability is maintained, but the power insufficiency and power endurance are limited for high power operations
Solution Approach 1:
The system changes the electrical parameters by implementing a high-voltage battery configuration (e.g., 54.6V from multiple cells in series) that dramatically increases power output capability compared to conventional 18V packs, while maintaining portability through integration into the backpack format and efficient space utilization.
Solution Approach 2:
The backpack blower system is designed as a multi-functional platform that can operate various high-power tools (blowers, trimmers, saws, etc.) using the same high-capacity power supply, making the portable high-power solution universally applicable to different gardening and landscaping tasks.
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 solution enhances the power supply's stability and user experience by balancing weight distribution, increasing the blower's operational endurance and air output, while maintaining portability and comfort during use.
Implementation Method 1
a blower device including a motor, a fan, and a duct assembly, where the motor drives the fan to rotate and generate an airflow
Data Source
AI summary
A backpack blower includes a blower device, a power supply, and a backpack device. The backpack device includes a device body and a strap assembly. The strap assembly is worn by a user. The strap assembly has a first center plane, and the center of gravity of the power supply and the blower device are separately located on two sides of the first center plane.