Extractor Hood Two-Chamber Design for Reduced Installation Effort
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Solution Overview
Problem
Existing ventilation arrangements with extractor hoods face challenges in being easily installed and adapted to varying suction power and space constraints, particularly in cramped areas like ship galleys, requiring significant installation effort and material usage.
Innovation Solution
A compact two-chamber extractor hood design with a distribution shaft and discharge chamber, featuring a return connection for recirculating filtered air, allowing for adjustable ventilation intensity and reduced material usage, which can be easily connected to existing ventilation systems and adapted to different installation conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a compact two-chamber design with integrated distribution shaft and discharge chamber is used, then installation effort and space requirements are reduced, but manufacturing complexity increases
Solution Approach 1:
The patent combines the distribution shaft and discharge chamber into a single integrated two-chamber unit, merging multiple functions (exhaust air distribution, discharge, and recirculation) into one compact structure. This reduces the number of separate components and connections needed during installation, directly addressing the installation effort challenge while accepting increased manufacturing integration complexity.
Solution Approach 2:
The integrated two-chamber hood structure serves multiple functions simultaneously: it acts as both a distribution shaft for exhaust air and a discharge chamber with recirculation capability. This multi-functionality reduces the need for separate ventilation components, simplifying installation while requiring sophisticated internal design to manage the combined functions.
2Loss of energy
If recirculation of filtered exhaust air is implemented, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The patent implements a recirculation pathway that feeds filtered exhaust air back into the vapor intake space, creating a feedback loop. This allows conditioned air to be reused, reducing energy loss while requiring additional internal pathways and control mechanisms within the two-chamber structure.
Solution Approach 2:
Instead of discarding all filtered exhaust air to the outside, the system recovers and recirculates a portion of it back into the kitchen space. This recovery process reduces energy waste by maintaining positive pressure and reducing the need for continuous fresh air intake, while requiring additional recirculation pathways within the hood structure.
3Loss of substance
If multiple distribution shafts interact with a single discharge chamber, then material usage is reduced, but airflow distribution complexity increases
Solution Approach 1:
The patent merges multiple distribution shafts into a single discharge chamber, consolidating multiple exhaust air streams into one common discharge point. This reduces the number of separate discharge connections and external ductwork needed, minimizing material usage while requiring careful internal airflow management to balance distribution from multiple shafts.
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 reduces installation effort and costs, achieves energy savings, and allows for flexible ventilation adjustments, making it suitable for various kitchen areas with minimal material expenditure while maintaining high efficiency.
Implementation Method 1
vapor containing water and/or fat is removed from the vapor intake space 9 via a separator 10 in a channel generally designated K
Implementation Method 2
vapor containing water and/or fat is removed from the vapor intake space 9 via a separator 10
Implementation Method 3
the exhaust air flow T formed behind the separator 10 in the flow direction S' reaches the discharge chamber 12 on predetermined 'conduction paths'
Implementation Method 4
the duct K' in the area of the distribution shaft 11'' and/or the diversion chamber 12' is provided with a return connection TR that captures at least a partial volume TV of the filtered exhaust air T, T'
Implementation Method 5
Heat exchangers are also provided in an extractor hood with air supply according to DE 30 11 101 A1, so that the thermal energy of the exhaust air can also be used here to preheat the supply air
Data Source
AI summary
A ventilation arrangement having a vapour extractor hood is provided, in particular, in the form of a vapour extraction means for the kitchen area. The extractor hood, which can be connected to a ventilation system by means of an outlet connection piece or similar connector, has a housing-like design and forms, together with an upper cover part and longitudinal and transverse side parts which are each angled away from said cover part, a vapour receiving space which is open at the bottom in the installed state. Water- and/or grease-containing vapour is received in a duct from said vapour receiving space via a separator and is passed to the outlet connection piece as largely cleaned waste air. According to the invention, at least one distribution shaft having respective discharge openings is provided as the duct which receives the filtered waste air, and said distribution shaft issues into a discharge chamber which is integrated in the housing structure at least in regions and has outlet connection piece.