Insert for a downdraft extractor
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Solution Overview
Problem
Downdraft extractors face challenges in grease removal and cleaning efficiency, with existing systems not adequately addressing these issues.
Innovation Solution
A modular insert for downdraft extractors featuring a removable filter element and collecting element with a curved or oblique flow directing surface, allowing for improved deflection and collection of cooking fumes, facilitating enhanced grease removal and easier cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional filter and collecting element design is used, then the structure is simple, but the grease removal degree is insufficient
Solution Approach 1:
The collecting element features a curved bottom surface that slopes downward toward the rear, creating a curved flow path for cooking fumes. This curvature design improves fluidic properties, enhances grease separation through centrifugal effects, and prevents liquid accumulation in dead zones, thereby increasing grease removal degree without adding complex mechanical components
Solution Approach 2:
The insert is divided into functionally distinct segments: a filter element with multiple layers for grease filtration and a separate collecting element with a curved bottom for liquid collection and disposal. This segmentation allows each component to be optimized for its specific function while maintaining overall system simplicity through modular assembly
2Ease of operation
If the filter element and collecting element are fixed together, then the structure is stable, but cleaning becomes difficult
Solution Approach 1:
The insert comprises a filter element and a collecting element that are detachably connected rather than permanently fixed. This segmentation enables the filter element to be removed independently for cleaning or replacement, significantly improving cleaning ease while the detachable connection maintains structural stability during operation
Solution Approach 2:
The connection between the filter element and collecting element is designed to be dynamically changeable - stable during extraction operation but easily separable for cleaning. This dynamic characteristic allows the structure to adapt between operational and maintenance states, resolving the contradiction between stability and cleaning accessibility
3Object-generated harmful factors
If the flow channel has sharp edges, then the structure is simple to manufacture, but noise increases and fluidic properties deteriorate
Solution Approach 1:
The flow channel within the collecting element features continuously curved surfaces without sharp edges or corners. The curved bottom surface and smooth transitions create laminar flow patterns, reduce turbulence-induced noise, and improve overall fluidic properties. This curvature design maintains manufacturing simplicity by using conventional molding techniques while eliminating noise-generating sharp edges
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 achieves a high degree of grease removal and improved fluidic properties, reducing noise and simplifying maintenance, while ensuring efficient extraction of cooking fumes and preventing liquid and dirt from being drawn into the removal channel.
Implementation Method 1
the wall serving as the flow directing surface of the collecting element leads in particular to a deflection of the stream of cooking fumes by approximately 90°, in particular by at least 10°
Data Source
AI summary
An insert for a downdraft extractor includes a removable filter element for filtering a stream of cooking fumes, and a removable collecting element for receiving liquids. The collecting element has at least one wall which serves as a flow directing surface for deflecting the stream of cooking fumes.