Multilayer Vehicle Air Filter with Ion Exchange and Active Carbon Layers
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Vehicle interior air filters face challenges in efficiently removing modern odorous substances like amines and aldehydes, and in preventing the growth and multiplication of microorganisms such as bacteria, algae, and fungi, which can contaminate the air stream and increase throughflow resistance.
Innovation Solution
A multilayer filter material with an ion exchange layer, an active layer, and an impregnation layer, where the ion exchange layer is positioned upstream to inhibit microorganism growth and the active and impregnation layers are configured to efficiently adsorb odorous substances, creating a toxic environment for microorganisms and reducing their multiplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple different filter materials are used for different odorous substances, then the cleaning effectiveness for various odorous substances is improved, but the throughflow resistance increases
Solution Approach 1:
The filter material is divided into multiple functional layers, each targeting specific odorous substances. The first layer contains adsorbents for certain odorous substances, while the second layer contains different adsorbents for other odorous substances. This segmentation allows each layer to specialize in removing specific contaminants, achieving comprehensive cleaning effectiveness while maintaining manageable throughflow resistance through optimized layer结构设计
Solution Approach 2:
The invention uses composite filter materials combining different types of adsorbents (such as activated carbon, zeolites, and other porous materials) in a layered structure. Each layer is composed of specific composite materials selected for their affinity to particular odorous substances, enabling the filter to handle diverse chemical contaminants effectively while controlling overall resistance through proper material selection and layer thickness optimization
2Reliability
If conventional hybrid filters are used according to standard specification, then filtration of standard odour pollutions is achieved, but modern odorous substances like amines and aldehydes cannot be sufficiently filtered
Solution Approach 1:
The invention modifies the filter material composition by selecting adsorbents with specific physical and chemical parameters suited for modern odorous substances. This includes choosing materials with appropriate pore sizes, surface areas, and chemical affinities for amines, aldehydes, and other contemporary contaminants. The layer structures are designed with specific thicknesses and densities to optimize the interaction between air flow and adsorbents, enhancing effectiveness against modern odorous substances while maintaining compliance with standard specifications
Solution Approach 2:
The filter material is designed with multi-functional layers that can simultaneously address both standard odorous substances (covered by ISO 11155 Part 2) and modern contaminants (amines, aldehydes). Each layer serves multiple purposes: filtering particulate matter, adsorbing specific gaseous contaminants, and providing structural support. This universal design allows a single filter system to handle diverse contamination scenarios without requiring separate specialized filters
3Reliability
If filter materials are added to remove more odorous substances, then the cleaning capability is improved, but the device complexity increases
Solution Approach 1:
The filter is segmented into a limited number of functional layers (typically two main layers) rather than using a complex multi-layer structure. Each layer is assigned a specific function based on the type of odorous substances it targets. This segmentation approach achieves comprehensive cleaning capability while avoiding excessive device complexity by consolidating functions into a manageable number of layers with clear functional differentiation
Solution Approach 2:
Multiple filtering functions are merged into integrated layer structures. Each layer combines particle filtration capabilities with gas-phase adsorption functions, eliminating the need for separate dedicated layers for each function. This merging of functions reduces the overall number of components and simplifies the device structure while maintaining the ability to remove various odorous substances effectively
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 multilayer filter material effectively reduces microorganism contamination and achieves efficient removal of odorous substances like ammonia, acetaldehyde, and hydrogen sulphide with low throughflow resistance, enhancing air quality in vehicle interiors.
Implementation Method 1
a ion exchange layer (13), in particular a hygroscopic ion exchange layer, is provided in the filter material (12)
Implementation Method 2
an active layer (14), in particular a layer with non-impregnated active carbon particles (16), and an impregnation layer (15), in particular a layer with impregnated active carbon particles (17, 18)
Data Source
AI summary
A multilayer filter material for an interior air filter element of an air conditioning system of a vehicle may include an ion exchange layer including ion exchange particles and a plurality of further layers. The ion exchange layer may directly adjoin at least one of the plurality of further layers. The plurality of further layers may include an active layer including non-impregnated active carbon particles, and an impregnation layer including impregnated active carbon particles. The active layer may be arranged between the ion exchange layer and the impregnation layer. The ion exchange layer may be hygroscopic and may contain ions which form a toxic environment with water. The impregnation layer may include a component of active carbon particles impregnated with potassium iodide and a component of active carbon particles impregnated with potassium carbonate. The component impregnated with potassium iodide may be greater than the component impregnated with potassium carbonate.