Handheld Vacuum Layout With Radial Airflow Redirection
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Solution Overview
Problem
The existing battery-powered handheld vacuum devices are excessively long and have a large cross-section due to the coaxial placement of cup-shaped filters and the fan impeller, making them cumbersome and less ergonomic for use at building sites.
Innovation Solution
A compact battery-powered handheld vacuum design featuring a radial fan impeller with a redirection device that redirects the radial airflow to be coaxial with the drive motor, a visco-elastic seal for secure dust collection, and a triangular cross-section dust collection box for improved air routing and reduced dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cup-shaped filters are placed coaxially with the fan impeller, then the filters can be effectively positioned for dust collection, but the device length and cross-sectional area increase making it cumbersome
Solution Approach 1:
The patent transitions from a traditional coaxial cylindrical arrangement to a triangular cross-sectional layout. The fan impeller maintains its radial configuration but is positioned within a triangular prism housing, allowing the dust collection box to be arranged in a different spatial dimension relative to the motor housing, thereby reducing the overall cross-sectional area while preserving filtering effectiveness.
Solution Approach 2:
The device is divided into distinct functional modules: a triangular prism motor housing containing the fan impeller, and a separate dust collection box with filter elements. This segmentation allows independent optimization of each component's shape and position, enabling the filters to be effectively positioned without requiring a large coaxial arrangement.
2Ease of operation
If the motor housing outer width is increased to accommodate the fan impeller, then the fan impeller can be properly positioned, but the device cross-section increases reducing robustness and compatibility
Solution Approach 1:
The patent employs an asymmetric triangular prism configuration for the motor housing rather than a symmetric cylindrical design. This asymmetric shape allows the fan impeller to be properly positioned within the housing while minimizing the overall outer width of the device, thereby improving robustness and compatibility with tool carrying cases without compromising fan impeller functionality.
3Device complexity
If radial airflow from the fan impeller is not redirected, then the airflow generation is simple, but the drive motor cannot be effectively cooled and suction power is reduced
Solution Approach 1:
The patent introduces an air guidance geometry as an intermediary component between the radial fan impeller and the drive motor. This geometry redirects the radially generated airflow into an axially directed flow that passes through the drive motor, enabling effective cooling of the motor and maintenance of suction power while preserving the simplicity of radial airflow generation.
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 design reduces the device's length and cross-sectional area, enhancing ergonomics, robustness, and compatibility with tool carrying cases, while maintaining suction power and allowing for easy filter replacement and storage.
Implementation Method 1
a radial fan impeller with a redirection device that redirects the radial airflow to be coaxial with the drive motor
Implementation Method 2
a visco-elastic seal for secure dust collection
Data Source
AI summary
A battery-powered handheld vacuum device for use on building sites includes: a dust collection box; and a motor housing, in which a drive motor provided with a fan impeller and a battery pack for supplying current to the drive motor independently of an electrical network are provided. The dust collection box is fixed in place on the motor housing in releasable manner. A handle, with which the battery pack engages at least sectionally, is formed on the motor housing.