Blockage-Resistant Bend Design for Air Treatment Devices
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Summary
Problems
Domestic air treatment apparatuses, such as vacuum cleaners, often experience clogs and blockages due to the redirection of airflow through bends with constricted cross-sectional areas, leading to inefficiencies and the need for clean-out ports.
Innovation solutions
Designing a fluid flow path with a bend that maintains a cross-sectional area equal to or greater than the inlet area, reducing the occurrence of clogs by ensuring a consistent or expanded path throughout the bend, and optionally constructing the bend from multiple parts for easy assembly or removal.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If the fluid flow path includes a bend with reduced cross-sectional area (constriction), then the apparatus can be more compact, but blockages or clogs occur within the bend
Why choose this principle:
The patent changes the geometric parameter of the bend by maintaining a constant cross-sectional area throughout the bend portion, rather than reducing it. This parameter change eliminates the constriction that causes blockages while still achieving the desired flow redirection, thereby maintaining reliability without sacrificing compactness
Principle concept:
If the fluid flow path includes a bend with constant cross-sectional area, then blockages are reduced, but the apparatus occupies more space
Why choose this principle:
The patent employs a curved bend design with smooth transitions and optimized curvature radius. By carefully designing the bend geometry with appropriate curvature, the apparatus achieves efficient flow redirection with constant cross-sectional area, minimizing the space occupied while preventing blockages
Application Domain
Data Source
AI summary:
Designing a fluid flow path with a bend that maintains a cross-sectional area equal to or greater than the inlet area, reducing the occurrence of clogs by ensuring a consistent or expanded path throughout the bend, and optionally constructing the bend from multiple parts for easy assembly or removal.
Abstract
A domestic air treatment apparatus such as a vacuum cleaner comprises a fluid flow path including a dirt inlet and a clean air outlet. A suction motor and a treatment member are provided in the flow path. The fluid flow path comprises a portion that has a bend, such as an elbow, wherein all portions of the fluid flow path through the bend have a cross sectional area that is at least about the same as a cross sectional area of the inlet.