Vehicle Cabin Air Filter Media for Recyclable NOx and VOC Removal
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Solution Overview
Problem
Existing methods for reducing exhaust gas components in vehicle interiors, such as NOx, SOx, VOC, and CO, are limited in effectiveness and require frequent filter replacement or recycling, and do not adequately address the accumulation of pollutants like CO2 and humidity.
Innovation Solution
A filter unit containing adsorbent granulate with manganese-containing granules and zeolite, which can be recycled, is used to adsorb and remove gaseous pollutants and bacteria, integrated into the air supply system of vehicles, allowing for permanent reduction of pollutants without replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If recirculation setting is used to prevent outside air intake, then pollutant accumulation is reduced, but CO2 and NOx accumulate quickly in interior air and humidity increases rapidly
Solution Approach 1:
The patent employs porous adsorbent materials (activated carbon, zeolites, metal-organic frameworks) with high surface area and porous structure to adsorb gaseous pollutants from the air. These materials provide permanent pollutant removal capability unlike recirculation settings, while allowing continuous air supply without CO2 and humidity accumulation issues.
Solution Approach 2:
The invention uses composite filter media combining multiple materials (activated carbon particles, zeolite particles, metal-organic framework materials) with different adsorption characteristics. This composite approach enables simultaneous removal of various pollutants (NOx, CO, VOCs, formaldehyde) and provides long-term effectiveness without the limitations of single-material filters or recirculation systems.
2Object-affected harmful factors
If HEPA/activated carbon filters are used, then filtering effect is achieved, but filter capacity is limited and loaded filters must be replaced frequently
Solution Approach 1:
The patent utilizes adsorbent materials with optimized parameters including high surface area, appropriate pore size distribution, and enhanced adsorption capacity. The composite material composition and particle size parameters are specifically designed to maximize pollutant uptake capacity and extend filter service life significantly beyond conventional filters.
Solution Approach 2:
The invention enables filter media regeneration by desorbing accumulated pollutants through heating or other methods, allowing the adsorbent materials to be recovered and reused. This eliminates frequent filter replacement and reduces waste, while maintaining continuous pollutant removal effectiveness.
3Object-affected harmful factors
If multiple active layers are used in filter medium, then NOx and SOx removal is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functional materials (activated carbon, zeolites, metal-organic frameworks) into a single integrated filter medium or cartridge. This merging approach achieves the pollutant removal effectiveness of multiple layers while simplifying the overall device structure, reducing the number of components, and facilitating easier installation and maintenance.
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 unit achieves significant and permanent reduction of gaseous pollutants and bacteria, with adsorbent granulate recyclability and NOx removal efficiency exceeding 80%, and can be integrated into vehicle air conditioning systems for continuous air purification.
Implementation Method 1
The filter unit is filled with adsorbent granulate... which can be easily replaced and recycled. The adsorbent granulate can be removed and replaced, for example when the filter unit is saturated with gaseous compounds (NOx, SOx, VOC, CO, etc.)
Implementation Method 2
The adsorbent granulate contains manganese-containing granules comprising a mixture of aluminum hydroxide diacetate (Al(CH3COO)2OH, acetic acid alumina) and permanganate
Implementation Method 3
A filter unit containing adsorbent granulate with manganese-containing granules and zeolite, which can be recycled, is used to adsorb and remove gaseous pollutants and bacteria
Data Source
AI summary
A filter unit for removing gaseous compounds (NOx, SOx, VOC, CO etc.) as well as bacteria and viruses from air, an arrangement for reducing the pollutant content of the air in an interior, in particular a motor vehicle interior, and a method for removing gaseous pollutants as well as bacteria and viruses from the air fed into an interior, in particular a vehicle interior.