Fume extraction device with odour filter element comprising a filter body with at least one adsorbent wrap and use of an odour filter
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vapor extraction devices face limitations in service life and separation efficiency of odor-active components due to bypass flow paths in adsorbent beds and limited adsorbent volume in pleated combination filters, leading to frequent maintenance needs, especially in professional settings.
Innovation Solution
A vapor extraction device with a hollow cylindrical filter body featuring a plurality of spirally arranged adsorbent coil layers, which increases adsorbent volume and prevents bypass flow paths, combined with a particle filter for additional particle separation, and a design that minimizes dust pollution during replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adsorbent beds are filled into chambers through which fluid can flow, then odor filtration is achieved, but bypass flow paths form between bed particles reducing separation efficiency
Solution Approach 1:
The patent uses a porous adsorbent wrap (such as activated carbon coated on a substrate) that allows fluid to pass through while maintaining continuous contact with the adsorbent material. The porous structure eliminates bypass flow paths by ensuring all fluid must pass through the adsorbent layer, thereby maintaining high separation efficiency without requiring complex chamber designs.
Solution Approach 2:
The invention employs a composite structure combining a substrate (providing mechanical strength) with an adsorbent coating (such as activated carbon, zeolite, or silica gel). This composite adsorbent wrap maintains structural integrity while providing effective odor filtration, avoiding the formation of bypass flow paths that occur with loose particle beds.
2Duration of action of stationary object
If pleated combination filters are used to prevent bypass flow paths, then separation efficiency is maintained, but adsorbent volume is limited reducing service life
Solution Approach 1:
The patent transitions from a two-dimensional pleated filter structure to a three-dimensional cylindrical configuration with radial flow. This dimensional change allows for significantly increased adsorbent volume within the same footprint, as the adsorbent wrap forms a continuous cylindrical layer through which fluid flows radially, maximizing the quantity of adsorbent material that can be utilized.
Solution Approach 2:
The invention employs a cylindrical (curved) geometry for the odor filter element, with the adsorbent wrap forming a continuous radial barrier. This curved configuration optimizes space utilization and allows for greater adsorbent volume compared to flat pleated designs, thereby extending service life while maintaining effective odor removal.
3Ease of operation
If hollow cylindrical filter cartridges with perforated plates are used, then fluid flow is enabled, but smallest adsorbent components pass through openings causing dust pollution
Solution Approach 1:
The patent replaces perforated plates with a porous adsorbent wrap that allows fluid to pass through while trapping adsorbent components. The porous structure provides fine filtration without requiring large openings, preventing dust pollution while maintaining effective fluid flow through the odor filter element.
Solution Approach 2:
The invention uses a thin-film adsorbent wrap that forms a continuous barrier without discrete openings. This flexible membrane structure allows fluid permeation while retaining the smallest adsorbent components, eliminating dust pollution issues associated with perforated plate designs.
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 solution significantly extends the service life and enhances separation efficiency of odor-active components, reducing maintenance frequency and dust pollution, while maintaining effective odor filtration in kitchen environments.
Implementation Method 1
The filter body has at least one adsorbent wrap (22) comprising a plurality of spirally arranged coil layers with at least one adsorbent
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a fume extraction device (10) comprising a housing (1) with an air intake opening (14) and an air outlet opening (15), as well as a blower-motor unit (3) arranged in the housing (1). Between the air intake opening (14) and the air outlet opening (15) is an odor filter element (2) through which air can flow radially along its longitudinal axis. The odor filter element (2) has a hollow cylindrical filter body (2') with an inner cavity comprising at least one adsorbent coil (22) comprising a plurality of coil layers with at least one adsorbent. Furthermore, the invention relates to the use of an odor filter element (2) comprising a hollow cylindrical filter body (2') with an inner cavity, wherein the filter body (2') has at least one adsorbent winding (22) comprising a plurality of winding layers with at least one adsorbent, in a fume extraction device.