Kitchen arrangement having extractor hood
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Solution Overview
Problem
Existing extractor hoods suffer from low capture rates of cooking vapors due to turbulence caused by upward suction and downward air curtains, allowing vapors to escape to the sides and rear.
Innovation Solution
An extractor hood design featuring a suction device with a suction fan positioned below the suction opening and a ceiling fan unit that creates a downward-directed air curtain, encapsulating vapors and directing them towards the suction opening, creating a laminar airflow that enhances capture efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If an upward suction flow and downward air curtain are used in conventional extractor hoods, then the extraction of fumes and vapors is achieved, but turbulence is generated that reduces the capture rate
Solution Approach 1:
The patent inverts the conventional airflow direction by using downward suction instead of upward suction. The suction opening is positioned at the bottom of the extractor hood and sucks air downward, while the air curtain flows upward from the cooking surface. This inverted configuration eliminates turbulence by having the suction and air curtain flows move in opposite directions without colliding, thereby improving the capture rate of fumes and vapors.
2Productivity
If conventional extractor hoods are used, then fume extraction is provided, but vapors escape to the front and sides due to low capture rate
Solution Approach 1:
By inverting the suction direction to downward flow and positioning the suction opening at the bottom, the patent creates a more effective containment zone. The downward suction combined with upward air curtain forms a more stable and confined airflow pattern that prevents vapor escape to the front and sides, thereby reducing substance loss.
Solution Approach 2:
The patent changes the airflow parameters by reversing the suction direction and adjusting the interaction between suction flow and air curtain. This parameter change creates a more effective capture zone that confines vapors more efficiently, preventing their escape to surrounding areas.
3Productivity
If the suction fan is positioned above the suction opening, then conventional extraction is achieved, but turbulence reduces extraction efficiency
Solution Approach 1:
The patent inverts the fan positioning from above to below the suction opening. The suction fan is now located at the bottom of the extractor hood, creating downward suction flow. This inverted positioning, combined with upward air curtain flow, eliminates turbulent interaction between opposing flows and improves extraction 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 design significantly improves vapor capture rates by encapsulating vapors and preventing escape, ensuring efficient suction and containment of cooking fumes and particles, even with high ceilings.
Implementation Method 1
The suction fan is arranged below the suction opening... air is sucked in downwards via the extraction opening
Implementation Method 2
the ceiling fan unit... creates a downward-directed air curtain, encapsulating vapors and directing them towards the suction opening
Implementation Method 3
creating a laminar airflow that enhances capture efficiency
Implementation Method 4
The extraction device preferably has at least one filter element through which the sucked-in fumes and vapors... are cleaned
Data Source
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AI summary
The present invention relates to an extractor hood for extracting air from a space above a cooktop (2), the extractor hood comprising an extraction apparatus (11) having at least one extraction opening (110) and at least one suction fan (111), which is arranged below the extraction opening (110). The extractor hood is characterized in that the extractor hood (1) has a ceiling fan unit (10), which is arranged above the extraction apparatus (11), at least one fan (101) and at least one air outlet opening (100) in the underside (104) of the ceiling fan unit (104), through which opening a downward-directed air curtain (L) is output, which air curtain delimits the space below the ceiling fan unit (10) on at least three sides. The invention additionally relates to a kitchen arrangement (4) having a cooktop (2) and at least one extractor hood (1).