Fume extraction device
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Solution Overview
Problem
Conventional fume extraction devices face a limitation in increasing grease separation efficiency without incurring a significant pressure drop, requiring more powerful fans to achieve higher degrees of fat separation.
Innovation Solution
A filter device with a filter body having varying outer sides and internal cavities, optimized for air flow, allowing for targeted adjustment of air permeability and reduced flow resistance, which enhances grease and contaminant separation while maintaining low pressure drop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of expanded metal layers is increased to improve grease separation efficiency, then the grease separation efficiency is improved, but the pressure drop across the filter device increases
Solution Approach 1:
The filter body is designed with non-uniform thickness, featuring a first region with greater thickness and a second region with lesser thickness. This local variation in filter material density creates zones with different flow resistance characteristics, allowing the filter to maintain high grease separation efficiency in the first region while reducing pressure drop in the second region, thus resolving the contradiction between separation efficiency and pressure drop
Solution Approach 2:
The invention changes the physical parameter of filter body thickness from uniform to variable. By adjusting the thickness parameter across different regions of the filter body, the patent optimizes the balance between grease capture capability (requiring more material) and air flow resistance (reduced by thinner sections), thereby achieving high separation efficiency without excessive pressure drop
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 filter device achieves a high degree of grease separation with reduced pressure drop, enabling efficient contaminant removal at lower fan power levels and ensuring sufficient air flow, thus improving the overall performance of fume extraction systems.
Implementation Method 1
at least one cavity is formed inside the filter body... optimized for air flow, allowing for targeted adjustment of air permeability and reduced flow resistance
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a filter device (3) for a steam extraction device (1), comprising at least one filter unit (31) with at least one filter element (310). The filter device (3) is characterised in that the at least one filter element (310) comprises a filter body (311), the distance between opposing outer sides of said filter body (311) varies, and at least one cavity (3111) is formed in the interior of the filter body (311). The invention also relates to a steam extraction device (1) having such a filter device (3).