Extractor Hood Filtration Layout for High-Airflow Recirculation
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Solution Overview
Problem
Existing vapor extraction devices have limited ventilation capacity in recirculation mode due to restricted filter size, which is constrained by the dimensions of the extractor hood or element, leading to obstructed airflow and reduced odor reduction efficiency.
Innovation Solution
The filter is designed to be independent of the extractor element and hood dimensions, with a larger surface area and multiple outlet surfaces, allowing for increased filter size and airflow without obstructing the extraction element, and can be arranged outside or between the element and ceiling/wall, enabling flexible placement and larger filter mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the filter size is increased to improve odor reduction capacity, then the filter surface area increases, but the filter obstructs the airflow in the extraction element
Solution Approach 1:
The filter is extracted from the extraction element and positioned in a separate location (ceiling-mounted or wall-mounted). This separation allows the filter to have a large surface area without obstructing the airflow path in the extraction element, resolving the contradiction between filter size and airflow capacity.
2Adaptability or versatility
If the filter is placed inside the extraction element to enable recirculation mode, then the filter can be integrated into the system, but the filter dimensions are limited by the extraction element size
Solution Approach 1:
The filter is extracted from the extraction element and placed in a separate ceiling or wall mounting position. This allows the filter surface area to be much larger than the extraction element cross-section, enabling effective recirculation mode operation with high filter capacity.
Solution Approach 2:
The filter is positioned in a different spatial dimension (ceiling or wall plane) rather than within the extraction element volume. This dimensional change allows the filter surface area to extend in directions perpendicular to the extraction element's airflow path, greatly increasing filter capacity without limiting airflow.
3Productivity
If a large filter is used to increase ventilation capacity, then odor reduction improves, but the device complexity and installation space requirements increase
Solution Approach 1:
The system is segmented into separate functional components: the extraction element (hood and duct) and the filter (ceiling or wall-mounted). This segmentation allows each component to be optimized independently and installed separately, reducing overall system complexity while enabling a large filter surface area for high ventilation capacity.
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 design significantly enhances odor reduction and airflow, reducing noise and allowing for a more compact, quieter extractor hood with improved filter performance and increased interaction time of air/vapor with the filter.
Implementation Method 1
the filter surface, for example the activated charcoal exit surface
Data Source
AI summary
Extractor device (100; 100') for installation in the vicinity of at least one fume source in a room, comprising: at least one hood (10) for extracting odours, at least one exhaust element (20) for removing the extracted fumes, wherein the exhaust element (20) is connected to the hood (10) by means of at least one suction opening and at least one filter (30) arranged at a distance from the hood (10) for filtering the extracted fumes. According to the invetion, said device may be improved over the state of the art by increasing the filter area, for example, the active charcoal effective area and/or the throughflow area for fumes or air without hindering airflow in the exhaust element (20), wherein the filter (30) is designed to blow the filtered fumes as filtered air into the room via at least one outlet area (32, 34, 36, 38) of the filter (30) and at least one dimension of the filter (30) is independent of the dimensions of the exhaust element (20) and the dimensions of the hood (10).