Flat Duct Extractor Layout for Low-Resistance Cooking Vapor Removal
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Solution Overview
Problem
Existing cooking vapor extraction devices obstruct kitchen furniture interior space and require powerful, energy-consuming fans due to high flow resistance, limiting their usability and efficiency.
Innovation Solution
A cooking vapor extraction device with a vertically oriented exhaust air duct system that deflects vapors laminarly, allowing for a compact design and reduced flow resistance, enabling the use of smaller, less power-consuming fans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vertically aligned tubular exhaust air duct is used to extract cooking vapors, then the extraction function is achieved, but the kitchen furniture interior space is obstructed and cannot be used for drawers or compartments
Solution Approach 1:
The exhaust air duct is transformed from a vertical tubular structure occupying the furniture interior to a flat duct system that runs along the rear wall and deflects downwards at the back, changing the spatial dimension from vertical to horizontal-rearward, thus freeing up the kitchen furniture interior space while maintaining extraction functionality
Solution Approach 2:
The exhaust air duct is extracted from the kitchen furniture interior space and relocated to run along the rear wall, separating the duct function from the furniture storage space, allowing the furniture interior to remain unobstructed
2Volume of moving object
If a tubular exhaust air duct with small cross-section is used, then the device size is reduced, but the flow resistance increases requiring powerful and expensive fans
Solution Approach 1:
The exhaust air duct cross-sectional area is increased and its shape is changed from tubular to flat, reducing flow resistance without increasing the overall device footprint, allowing the use of smaller, less power-consuming fans
Solution Approach 2:
The duct system incorporates rounded corners and smooth transitions instead of sharp edges, reducing turbulence and flow resistance, which decreases the power required by the fan
3Device complexity
If sharp-edged 90° bends are used in the pipeline system, then the duct structure is simple, but the flow resistance becomes very high causing turbulent vapor guidance
Solution Approach 1:
The duct system uses rounded corners and curved transitions instead of sharp-edged 90° bends, smoothing the vapor flow path and significantly reducing turbulence and flow resistance while maintaining a relatively simple structural configuration
Solution Approach 2:
The duct system incorporates gradual directional changes in multiple dimensions rather than abrupt single-plane bends, distributing the flow direction change over a longer path with smaller angle deviations, reducing turbulence
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 device maintains efficient vapor extraction while minimizing space obstruction and energy consumption, allowing for unobstructed use of kitchen furniture and reduced noise and operational costs.
Implementation Method 1
the passage of the cooking vapors flowing through the cooking vapor inlet device and their deflection by the closing element rotated or pivoted to the side or by the wall of the cooking vapor inlet device that is inclined or concavely curved instead of the obliquely attached initial section of the exhaust air duct without turbulence and/or laminar
Data Source
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AI summary
A built-in kitchen has a cooking stove with a horizontal array of electrical hotplates or gas burners in the same plane as an extractor outlet aperture. The aperture has a hinged cover that retracts on opening into the duct, where it acts as a baffle plate guide to the incoming air vapors, directing them through a horizontal outlet.