Downdraft Hood Filter Body With Liquid and Condensate Collection
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Solution Overview
Problem
Downdraught extractor hoods face issues with liquid intake from pots into the aspiration opening, leading to problems in filtering fumes and condensate management in the piping system, which existing solutions do not adequately address in terms of efficiency and simplicity.
Innovation Solution
A compact filtering body with a prismatic form and a dual-filtering unit, comprising a reticulated metal first filtering element and a metal plate second filtering element, positioned between the aspiration opening and the aspiration unit, along with a collection unit to manage liquids and grease, ensuring effective filtration and condensate collection without disrupting the hood's operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a filtering unit is placed between the aspiration opening and the aspiration unit, then fume filtration is improved, but liquid intake from pots into the piping system occurs
Solution Approach 1:
A collection element is introduced as an intermediary component between the aspiration opening and the filtering unit. This element serves as a mediator that intercepts liquids falling from pots before they can enter the piping system, while allowing fumes to pass through to the filtering unit. The collection element thus resolves the contradiction by adding an intermediate structure that handles the liquid separation function.
Solution Approach 2:
The internal volume of the filtering body is divided into distinct functional zones: an upper collection zone for receiving liquids from pots, a middle filtering zone for fume filtration, and a lower zone for condensate collection. This segmentation allows each zone to perform its specific function independently, preventing liquid interference with the filtration process while maintaining effective fume cleaning.
2Object-affected harmful factors
If a collection element with curved or oblique surfaces is used to guide fumes, then liquid deflection is improved, but the device complexity increases
Solution Approach 1:
Instead of using complex curved surfaces to guide liquids away, the invention uses a simple horizontal collection element with vertical side walls that extend upward to contact the aspiration opening. The liquid deflection is achieved not by curving the collection element itself, but by the interaction between the falling liquid and the horizontal surface, combined with the vertical walls that contain the liquid laterally. This inverts the approach from shaping the guide surface to using gravity and containment.
Solution Approach 2:
The collection element features a horizontal upper surface configured to receive liquids falling from pots, with vertical side walls that extend upward. By changing the geometric parameters to include this horizontal surface orientation and vertical wall configuration, the element effectively deflects liquids in a simple manner without requiring complex curved geometries, thus reducing manufacturing complexity while maintaining liquid deflection effectiveness.
3Ease of manufacture
If a compact filtering body is designed, then installation simplicity is improved, but filtration efficiency may be compromised
Solution Approach 1:
The filtering body is designed as a compact, substantially box-shaped structure where the collection element, filtering unit, and condensate collection means are nested within each other in a space-efficient arrangement. The collection element sits in the upper portion, the filtering unit occupies the middle section, and the condensate collection means are positioned in the lower portion, all within a single integrated housing. This nesting approach achieves compactness without sacrificing the functional effectiveness of each component.
Solution Approach 2:
The filtering body integrates multiple functions into a single compact unit: liquid collection from pots, fume filtration through the filtering unit, and condensate collection and drainage. By combining these three distinct functions into one multi-functional device, the invention achieves compactness and installation simplicity while maintaining all necessary filtration and liquid management capabilities, thus not compromising overall system efficiency.
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 solution effectively collects and filters liquids and grease, preventing their entry into the piping system, maintaining the hood's efficiency and simplicity of production and installation, while ensuring effective grease retention and condensate management.
Implementation Method 1
a first filtering element (20) defined by a reticulated body and a second filtering element (22) defined by a metal plate
Implementation Method 2
a collection unit (50, 12) to collect any liquid which may have entered the hood (2) through the aspiration opening (5)
Data Source
Figure 1
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Figure 3
AI summary
A filtering body (1) for a downdraught extractor hood (2), said extractor hood (2) being associated with a hob (3) and comprising an aspiration opening (5) created inside this hob (3), an aspiration unit (10) connected to this opening (5), and the filtering body (30) interposed between said opening (5) and the aspiration unit, said filtering body (1) comprising at least one filtering unit (30) below said opening, and overlying a unit for collection of liquids coming from the opening (5) in the hob (3) and/or of condensate which is created on the filtering unit; said filtering unit (30) has a central portion (35) going towards said opening (5) and lateral parts (36) going away from said opening, and being able to convey the liquids, oil and grease and/or condensate into the collection unit below which has an annular form.