Fold-Out Extractor Hood Wings Against Cross Air Currents
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Solution Overview
Problem
Extractor hoods fail to completely extract odorous vapors when transverse air currents are present, such as when windows are open, leading to incomplete removal of cooking fumes and compromised air quality.
Innovation Solution
The extractor hood features articulating wings at different points of the housing that can be pivoted into a vertically downward position, providing shielding against transverse air currents and guiding vapors for effective extraction, with a braking device for adjustable and secure locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If transverse air currents are present (e.g., windows open), then air circulation is improved, but vapor extraction completeness deteriorates
Solution Approach 1:
The wings are positioned to preemptively block transverse air currents before they can disrupt the vapor extraction path. By creating a protective barrier that opposes draft forces in advance, the system maintains reliable vapor capture even when windows are open or transverse currents are present.
Solution Approach 2:
The wings act as an intermediary element between the transverse air currents and the vapor extraction system. This intermediate structure shields the extraction zone from harmful drafts while allowing the benefits of air circulation to persist elsewhere in the kitchen environment.
2Reliability
If wings are folded down to shield against transverse air currents, then vapor extraction reliability is improved, but device complexity increases
Solution Approach 1:
The protective structure is divided into multiple independent wings that can be individually articulated and positioned. This segmentation allows the system to achieve comprehensive shielding against transverse currents from multiple directions while maintaining a relatively simple overall structure that can be implemented using standard hinge mechanisms.
Solution Approach 2:
The wings are designed to be movable rather than fixed, allowing them to be articulated into position only when needed for shielding. This dynamic configuration enables the system to maintain simplicity during normal operation while providing reliable protection when transverse air currents are present.
Data Source
Figure 1~2
Figure 3~4
AI summary
The extractor hood (10) has a folding wing (15,16) and a housing (11), at which the wing is held on the edge side, where the wing is fixed in a horizontal closed position. One or multiple wings are hinged at different points of the housing and are coupled in vertically downward position. The wings operate a screening of possible cross air flows or an additional guide of the sucked fume (19).