Vapour extraction device and kitchen appliance with cooking hob and vapour extraction device
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Solution Overview
Problem
Existing extractor devices have low efficiency due to large extraction openings, which suck in clean air along with vapors, are difficult to clean, and have complex structures.
Innovation Solution
A fume extraction device with a suction shaft and a vapor trap consisting of two flat screen elements that form a suction gap, where the screen elements are detachably mounted and protrude beyond the passage openings, allowing for efficient vapor capture and easy cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a large extraction opening is used to capture vapors, then vapor capture efficiency is improved, but clean air is also drawn in reducing extraction efficiency
Solution Approach 1:
The extraction opening is segmented into multiple smaller openings distributed across the extraction duct, allowing selective vapor capture while minimizing clean air intake. The screen elements create multiple extraction gaps that collectively provide efficient vapor capture with reduced overall opening area.
Solution Approach 2:
The screen elements are positioned to create extraction gaps at specific locations where vapor concentration is highest, allowing localized efficient extraction without requiring a large overall opening. The screen mesh structure provides different qualities of filtration at different positions.
2Productivity
If a traditional extractor hood design is used, then vapor extraction is achieved, but the device is difficult to clean and has complex structure
Solution Approach 1:
The extraction system is divided into modular screen elements that can be easily removed and cleaned separately. The screen elements are detachably mounted in the extraction duct, allowing maintenance without disassembling the entire device.
Solution Approach 2:
The screen elements can be removed and replaced, allowing for easy cleaning and maintenance. The detachable mounting system enables parameter changes in terms of accessibility and maintainability without affecting the overall extraction performance.
3Productivity
If screen elements protrude beyond passage openings, then vapor capture efficiency is improved, but device space requirements increase
Solution Approach 1:
The screen elements extend in the vertical dimension beyond the passage openings to create extraction gaps that enhance vapor capture. This dimensional extension provides improved vapor capture efficiency without significantly increasing the horizontal footprint of the device.
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 enhances vapor capture efficiency while being easy to clean and maintain, with the screen elements acting as filters and reducing the device's complexity and space requirements.
Implementation Method 1
The vapor trap consists of at least two flat screen elements, which are arranged parallel to each other, with the extraction gap formed between the screen elements
Implementation Method 2
an air inlet opening and at least one through-opening are formed in the upper end of which an air inlet opening and at least one through-opening are formed
Data Source
Figure 1
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Figure 5~6
AI summary
The present invention relates to a fume extraction device with an extraction shaft (24) in the upper end of which an air inlet opening (290) and at least one passage opening (29) are formed, and at least one vapor trap with at least one extraction gap (20) located in the extraction shaft (24). The extractor hood is characterized in that the vapor capture consists of at least two flat screen elements (21, 22, 22'), at least two passage openings (29) are formed in the upper end of the extraction duct (24), the extraction gap (20) is formed between the screen elements (21, 22, 22'), the at least two screen elements (21, 22, 22') partially project beyond the passage opening (29) of the extraction duct (24), and the at least two screen elements (21, 22, 22') are detachably fixed in the extraction duct (24). Furthermore, a kitchen appliance comprising such an extractor hood (2) is described.