Fume extraction device comprising filter device
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Solution Overview
Problem
Existing extractor devices face challenges in achieving reliable air suction and cleaning with a low power requirement, particularly in designs with limited intake openings, such as those installed next to or under hobs, where the available filter surface is restricted, leading to inefficient air flow and handling difficulties.
Innovation Solution
A filter device with at least two filter elements arranged in a V-shape and held within a common frame, featuring varying thickness across the width to optimize air permeability and pressure drop, allowing for increased filter surface area without enlarging the intake opening, and facilitating easy removal and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction opening is enlarged to provide sufficient filter surface, then air cleaning reliability is improved, but the extractor hood requires high power operation
Solution Approach 1:
The filter element is designed with variable thickness in the third dimension, creating a three-dimensional filter structure with increased volume and surface area. This allows sufficient filter surface to be achieved within the limited space of the small suction opening, eliminating the need to enlarge the opening or increase power consumption.
2Area of stationary object
If plate-shaped filter elements are placed at an angle in a widening of the exhaust air duct to increase filter surface, then filter surface area is improved, but handling becomes unfavorable
Solution Approach 1:
Instead of placing filters at an angle in a widening duct section, the invention creates a three-dimensional filter element with variable thickness that fits within the regular duct geometry. The increased filter surface is achieved through the third dimension (thickness variation) rather than spatial reconfiguration, maintaining easy access and handling.
Solution Approach 2:
The filter element has non-uniform thickness distribution, with thicker regions providing increased filtration surface area and thinner regions allowing compact installation. This local variation in quality enables sufficient filter surface without compromising handling or requiring structural modifications to the duct.
3Device complexity
If the filter device structure is simplified, then device complexity is reduced, but filter surface area and storage volume are limited
Solution Approach 1:
The invention achieves increased filter surface area and storage volume through a single integrated three-dimensional filter element with variable thickness, rather than through complex multi-component structures. The geometric optimization in the third dimension provides enhanced performance while maintaining structural simplicity.
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 ensures efficient air cleaning with reduced fan power requirements, enhanced filter surface area, and improved handling by maximizing storage volume and filter surface while minimizing the device's overall height and obstruction, allowing for reliable air intake and cleaning with lower operational power.
Implementation Method 1
filter devices by means of which grease and other impurities are filtered out of the vapors and vapors sucked into the extractor device
Data Source
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AI summary
The invention relates to a filter device for a fume extraction device (1), comprising at least two filter elements (20) and at least one holding frame (21) for holding the at least two filter elements (20). The filter device is characterized in that each filter element (20) has a variable distance (A) between the opposite outer faces (200, 201) of the filter element (20) over the surface of the filter element, at least two filter elements (20) are arranged at an angle relative to each other, and an edge (203) of one of the filter elements (20) lies adjacent to an edge (203) of the other filter element (20). The invention additionally relates to a fume extraction device (1) which has a fume extraction housing (10) with a suction opening (100) in the upper face of the fume extraction housing (10) and a fan that is arranged so as to be offset towards the bottom relative to the suction opening (100). The fume extraction device (1) is characterized in that the fume extraction device (1) has at least one filter device (2) according to the invention.