Vacuum Cleaner Air Outlet Bay for Lower Exhaust Air Speed
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Solution Overview
Problem
Compact dry vacuum cleaners face issues with high exhaust air speed causing dust swirling and unpleasant air impingement due to small outlet openings, which is exacerbated by their design.
Innovation Solution
The air outlet system features an accommodation bay across a corner of the housing, allowing for a larger flow cross-section and optional modular air filter or adapter, reducing exhaust air speed through a diffuser design and filter openings, and enabling both suction and blowing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the outlet opening cross-sectional area is reduced to achieve compact design, then the device size is reduced, but the exhaust air speed increases causing dust swirling and unpleasant air impingement
Solution Approach 1:
The accommodation bay is positioned across a corner of the housing, utilizing three-dimensional space efficiently. This corner placement allows the outlet to access space that would otherwise be unused, enabling a larger effective outlet area without increasing the device's footprint in any single dimension.
Solution Approach 2:
The outlet system is divided into modular components: the accommodation bay, the air filter cartridge, and the outlet adapter. This segmentation allows the air filter cartridge to be positioned within the corner bay while the outlet adapter extends the exhaust flow path, effectively increasing the outlet area without compromising compactness.
2Speed
If the outlet opening cross-sectional area is increased to reduce exhaust air speed, then dust swirling and air impingement are reduced, but the device size increases
Solution Approach 1:
By positioning the accommodation bay across a corner of the housing, the design utilizes the third dimension (depth) to create space for a larger outlet area. The corner location provides access to volume that doesn't increase the device's external dimensions, allowing larger outlet cross-section without increasing overall size.
Solution Approach 2:
The air filter cartridge is nested within the accommodation bay, and the outlet adapter is attached to the bay. This nesting arrangement allows multiple components to occupy the same spatial envelope, enabling a larger effective outlet area without proportionally increasing the device's external dimensions.
3Reliability
If a modular air filter cartridge is used, then filtering function is improved, but the device complexity increases
Solution Approach 1:
The air filter is segmented into a modular cartridge that can be independently installed and removed from the accommodation bay. This segmentation provides the filtering function while maintaining relatively simple integration through standardized interfaces between the cartridge and bay.
Solution Approach 2:
The accommodation bay serves multiple functions: it houses the air filter cartridge, provides structural support for the outlet adapter, and utilizes corner space efficiently. This multi-functionality reduces the need for separate components, thereby reducing overall system complexity despite the modular filter design.
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
This design enhances the compactness of dry vacuum cleaners by reducing exhaust air speed, minimizing dust swirling, and preventing air from impinging on users, while allowing for flexible operation as a blower or vacuum.
Implementation Method 1
the accommodation bay is designed as a diffuser. It is thus already possible to achieve a reduction in the outflow speed of the exhaust air
Implementation Method 2
If an air filter cartridge is accommodated in the accommodation bay provided according to the invention, the exhaust air is expelled into the surroundings after being filtered by the air filter cartridge
Data Source
AI summary
An air outlet system for a portable dry vacuum cleaner, via which intake air sucked in by the dry vacuum cleaner can be expelled into the surroundings as exhaust air, wherein the air outlet system has an accommodation bay, which is to be arranged in a housing of the dry vacuum cleaner and in which optionally an air filter cartridge or an outlet adapter may be accommodated, wherein the outlet adapter has an outlet fitting for the connection of a blower hose and the air filter cartridge is free from an outlet fitting of this kind.