Kitchen Extractor Hood with Vortex Flow for Compact Fume Interception
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Solution Overview
Problem
Conventional kitchen extractor hoods are cumbersome and noisy due to their large size and powerful fan motors required to effectively extract fumes from high-power burners, and they lack efficiency in intercepting rising fumes.
Innovation Solution
The design incorporates a distributor with inclined deflector fins generating two vortex-shaped airflows that rotate around a vertical axis, intercepting fumes from the cooktop and conveying them efficiently into the extractor hood, allowing for underdimensioned fans and reduced noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large box body and powerful fan motor are used to ensure effective fume extraction, then fume extraction efficiency is improved, but the hood becomes cumbersome and noisy
Solution Approach 1:
The distributor generates vortex airflows in advance that rise from below the cooktop and intercept fumes before they can escape laterally. This preliminary action of creating upward vortex flows that meet the rising fumes allows the use of a smaller, less powerful fan while maintaining effective extraction efficiency.
2Productivity
If a large box body is used to capture all rising fumes, then fume extraction completeness is improved, but the hood becomes cumbersome
Solution Approach 1:
Instead of relying solely on lateral expansion of a large box body to capture fumes, the invention introduces a vertical dimension by generating upward vortex airflows from below the cooktop. This vertical airflow dimension intercepts fumes rising from the burners and directs them into the extraction inlet, achieving complete fume capture with a more compact hood structure.
3Force
If a powerful fan motor is used to create strong depression for fume extraction, then extraction force is improved, but noise increases
Solution Approach 1:
The distributor creates preliminary upward vortex airflows that actively meet and intercept the rising fumes before they reach the extraction plane. This preliminary action reduces the workload on the fan motor, allowing it to operate at lower power and generate less noise while still maintaining effective extraction force through the combined effect of vortex flows and fan depression.
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 configuration enhances fume extraction efficiency while minimizing the size and noise of the extractor hood, effectively handling high-power burners with improved airflow dynamics.
Implementation Method 1
a distributor (6) mounted at the lower end of the delivery conduit and suitable for generating at least one vortex-shaped airflow (V), which rotates around a vertical axis that coincides with the axis of the distributor along a helicoidal direction
Implementation Method 2
Such a vortex-shaped flow intercepts the fumes extracted from the cooktop and conveys said fumes towards the fume inlet opening of the base of the box body of the extractor hood
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
An extractor hood (100) comprises: a box body (1 ), an extractor fan (2) with at least one inlet (21, 22) in communication with an internal chamber (18) of the box body, a delivery fan (3) with inlet (31 ) in communication with the internal chamber (18) of the box body and a delivery outlet (33) in communication with a delivery conduit (5), a distributor (6; 106) disposed at the end (50) of the delivery conduit. The distributor (6; 106) comprises an annular body (60) and a plurality of deflector fins (62) that protrude from the internal surface (60a) of the annular body in such a way to generate at least one vortex-shaped flow (V1; V2) that rotates around the axis (A) of the distributor under the distributor (6; 106) and in front of the opening (1 1 ) of the base portion (10) of the box body through which fumes (F) are extracted.