Cyclonic Separator Exhaust Grill Structure to Minimize Dust Re-Entrapment
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Solution Overview
Problem
Cyclone separators in vacuum cleaners often have inefficiencies in separating debris due to the design of the exhaust grill, which can lead to re-entrainment of dust and debris, affecting the overall cleaning performance.
Innovation Solution
The design incorporates a separator and collection module with a housing featuring a first separation chamber and an exhaust grill with spaced vanes that define air inlet passages, including at least one vane with an air exhaust conduit, optimizing the airflow path to enhance debris separation and collection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional exhaust grill with perforations or louvers is used, then the structure is simple and easy to manufacture, but dust and debris can be re-entrained into the airflow reducing separation efficiency
Solution Approach 1:
The exhaust grill is segmented into multiple functional zones: an exhaust conduit for filtered air passage, inlet vanes for flow direction control, and louvers for airflow regulation. This segmentation allows each component to perform its specific function optimally, preventing dust re-entrainment while maintaining manufacturing feasibility through modular construction
Solution Approach 2:
Different regions of the exhaust grill are given different properties: the exhaust conduit provides a smooth sealed passage for filtered air, the inlet vanes create specific flow patterns, and the louvers control airflow rate. This local differentiation of structural qualities enables high separation efficiency in the exhaust region while keeping other regions structurally simple
2Productivity
If the exhaust grill creates turbulent airflow to improve mixing, then air circulation is enhanced, but dust and debris are more likely to be re-entrained reducing cleaning performance
Solution Approach 1:
Instead of creating turbulence to improve mixing, the design inverts the approach by using laminar, controlled airflow through the exhaust conduit. The inlet vanes and louvers are designed to guide air smoothly without creating eddies or turbulent zones that would cause dust re-entrainment, thereby maintaining high cleaning performance through controlled rather than chaotic flow
3Ease of operation
If the exhaust grill is designed with multiple flow control elements, then airflow management is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
Multiple flow control functions are merged into a single integrated exhaust grill structure. The exhaust conduit, inlet vanes, and louvers are combined into one component that can be manufactured as a single piece or pre-assembled module, providing sophisticated airflow management without requiring multiple separate parts and reducing manufacturing complexity
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 configuration improves the separation efficiency by minimizing re-entrainment of dust and debris, resulting in better cleaning performance and easier debris disposal.
Implementation Method 1
Cyclone separators can comprise one or more frusto-conical shaped separators, or use high-speed rotational motion of the air/dirt to separate the dirt by centrifugal force
Implementation Method 2
The exhaust grill can employ perforations, holes, inlet vanes, or louvers that define inlet openings through which filtered working air may pass
Data Source
AI summary
A vacuum cleaner comprises an improved dirt separator and collection module, which includes an exhaust grill comprising a plurality of vanes defining inlet passages for guiding working air through the module. At least one of the vanes can define an air exhaust conduit for exhausting working air from the module through the exhaust grill.