Labyrinth filter for kitchen extractor hoods
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Solution Overview
Problem
Existing labyrinth filters for kitchen extractor hoods face challenges in creating complex trajectories with simple and cost-effective production, as they require complex assembly of differently shaped sections, leading to high production costs and long times.
Innovation Solution
A labyrinth filter design featuring a frame with lower, upper, and intermediate metal sections, where the intermediate sections have holes on their lateral walls to optimize airflow and filtering efficiency, allowing fumes to flow through and deposit grease effectively, while maintaining a simple assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex trajectories are created using differently shaped sections, then filtering efficiency is improved, but device complexity and production costs increase
Solution Approach 1:
The filter is divided into modular sections that can be assembled in different configurations. Each section contains standardized components that can be combined to create various trajectory complexities, allowing the system to achieve high filtering efficiency while maintaining simple production and assembly processes through modular construction.
Solution Approach 2:
Multiple trajectory levels are nested within each other, with intermediate sections containing holes that allow fumes to pass through to lower levels. This nesting creates complex three-dimensional trajectories using simple stacked sections, improving filtering efficiency without requiring complex individual section designs.
2Reliability
If more winding trajectory is imposed on fumes, then filtering efficiency is improved, but production time and costs increase
Solution Approach 1:
The sections are pre-designed with standardized hole patterns and geometries that automatically create the winding trajectory when assembled. The intermediate sections come pre-configured with holes in specific positions, so that when stacked with upper and lower sections, the complex trajectory is formed without requiring complex assembly operations, thus maintaining high production speed.
Solution Approach 2:
The filter design utilizes vertical stacking of sections to create three-dimensional trajectories. By adding the vertical dimension through stacked levels connected by intermediate sections with holes, the system achieves complex winding paths without increasing horizontal complexity, allowing for simpler manufacturing and faster production.
3Reliability
If intermediate sections have holes for fume passage, then filtering efficiency is improved, but structural complexity increases
Solution Approach 1:
The intermediate sections have holes positioned at specific locations rather than being uniformly perforated. This local quality approach places holes only where needed for optimal fume flow between levels, achieving high filtering efficiency while maintaining simple section designs that are easy to manufacture and assemble.
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 filter achieves a high filtering efficiency by allowing fumes to flow through perforated intermediate sections, effectively reducing flames and grease deposition on the filter walls, enhancing the complexity of the trajectory without increasing production complexity or costs.
Implementation Method 1
The intermediate sections comprise a plurality of holes obtained at least on the lateral walls of the intermediate sections to let the fumes pass through
Implementation Method 2
the grease particles contained in the fumes are deposited on the walls of the labyrinth trajectory
Data Source
Figure 1~2
Figure 3
Figure 3A
AI summary
A fume extractor filter (1) comprises: a frame (2), a plurality of lower sections (3) disposed in the frame (2), a plurality of upper sections (4) disposed in the frame above the lower sections (3), and a plurality of intermediate sections (5) disposed between the lower sections (3) and the upper sections (4), in a way to generate a winding labyrinth trajectory for the fumes passing through the filter. The intermediate sections (5) comprise a plurality of holes (55) obtained at least on lateral portions (51, 52) of the intermediate sections to let the fumes pass through.