Extractor Hood Air Inlet Layout for Reduced Particle Deposition
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Solution Overview
Problem
Extractor hoods with edge suction designs suffer from particle deposition on the device due to air deflection, leading to reduced fat label accuracy and aesthetic issues, as well as potential dripping on stoves.
Innovation Solution
Incorporating an air supply opening at the deflection station within the flow channel, utilizing either exhaust air or ambient air to deflect contaminants effectively towards the filter element, reducing particle deposition on the hood and improving the grease label.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If air deflection is reacted by 90° in the intake gap, then the air flow is directed towards the filter element, but particle deposition on the device increases due to mass inertia effects
Solution Approach 1:
The flow channel is divided into multiple sections with different deflection angles. Instead of a single 90° deflection, the channel provides a gradual direction change through segmented angular transitions, reducing mass inertia effects and particle deposition while maintaining effective air flow control towards the filter element.
Solution Approach 2:
The deflection angle parameter is changed from a fixed 90° to a variable gradient of angles along the flow channel. This parameter change optimizes the balance between air flow direction control and reduction of particle deposition by adjusting the rate of direction change at different locations in the channel.
2Object-generated harmful factors
If a complex structure with multiple housings and air supply channels is used, then particle deposition can be reduced, but the device complexity increases
Solution Approach 1:
The housing and flow channel are merged into an integrated structure. The flow channel is formed as part of the housing itself rather than as a separate component, eliminating the need for multiple discrete housings and air supply channels while maintaining the functionality of reducing particle deposition through optimized flow path design.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, defines the flow channel geometry, and incorporates the deflection stations. This multi-functionality eliminates the need for separate dedicated components for each function, simplifying the overall device structure while achieving particle deposition reduction.
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 design effectively reduces particle deposition on the extractor hood, enhances the fat label accuracy, and prevents visible fat accumulation, increasing customer satisfaction and extending cleaning intervals while improving energy efficiency.
Implementation Method 1
Through the blower, a negative pressure is generated, which serves to suck in pollute air
Implementation Method 2
utilizing either exhaust air or ambient air to deflect contaminants effectively towards the filter element
Implementation Method 3
the extractor hood has at least one filter element on which the contaminated air can be cleaned
Data Source
Figure 1~2
Figure 3~4
AI summary
The present invention relates to an extractor hood comprising a fan (13), at least one filter element (140), a baffle plate (15), and a housing (1) which forms at least one portion of a flow chamber (10) having a flow channel (12) with an edge suction region which has at least one inlet opening (150). The extractor hood is characterised in that at least one air-inflow opening (16) is located in the region of at least one deflection point (120) of the flow channel (12).