Segmented Sorption Filter Cartridge for EV Cabin Air Recirculation
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Solution Overview
Problem
In electric vehicles, recirculating air conditioning systems lead to water vapor accumulation, causing window fogging and carbon dioxide concentration, posing safety and health risks due to the lack of dehumidification and air exchange.
Innovation Solution
A sorption filter cartridge with a fluid-permeable housing containing multiple compartments with non-woven fiber layers and granulate sorbents, capable of adsorbing and absorbing carbon dioxide, water, and other pollutants, which can be regenerated by heat, allowing for efficient air purification and reduction of harmful substances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If air recirculation mode is used to save energy, then energy consumption is reduced, but water vapor and carbon dioxide accumulate in the passenger compartment
Solution Approach 1:
The filter cartridge is divided into multiple housing rooms (first, second, third housing rooms) that are separated from each other. Each housing room contains specific sorbents for different functions: CO2 sorbent in the first housing room, water sorbent in the second housing room, and additional CO2 sorbent in the third housing room. This segmentation allows simultaneous removal of different harmful substances while maintaining energy-efficient recirculation mode.
Solution Approach 2:
The patent uses sorbent materials with porous structures that can adsorb and absorb harmful substances from the recirculated air. The granulate portions comprising sorbents are placed between non-woven fiber layers, creating a porous filtration system that effectively removes water vapor and carbon dioxide without requiring fresh air intake, thus maintaining low energy consumption.
2Object-affected harmful factors
If multiple sorbent types are used to remove different substances, then air purification effectiveness is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple sorbent types (CO2 sorbent and water sorbent) into a single integrated filter cartridge structure. The different sorbent granulate portions are housed in separate but adjacent housing rooms within the same cartridge, allowing simultaneous removal of multiple harmful substances while maintaining a compact, unified device that does not significantly increase overall system complexity.
Solution Approach 2:
The filter cartridge is designed as a multi-functional unit that simultaneously performs CO2 removal, water vapor removal, and particulate filtration. The non-woven fiber layers provide mechanical filtration while the sorbent granulate portions provide chemical adsorption and absorption functions, creating a universal air purification device that handles multiple contaminants in one system.
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
Effectively reduces water vapor and carbon dioxide levels, preventing window fogging and improving air quality, thereby enhancing safety and comfort while minimizing the need for fresh air intake, thus conserving energy.
Implementation Method 1
In the present context, 'sorption' refers to processes that lead to an enrichment of a substance, for example carbon dioxide or water, within a phase or on an interface between two phases. Accumulation within a phase is referred to as absorption, while accumulation at the interface is referred to as adsorption.
Implementation Method 2
In the present context, 'sorption' refers to processes that lead to an enrichment of a substance, for example carbon dioxide or water, within a phase or on an interface between two phases. Accumulation within a phase is referred to as absorption, while accumulation at the interface is referred to as adsorption.
Implementation Method 3
By applying heat to the sorbent, the adsorbed and/or absorbed substances can be released from the sorbent. Desorption thus generally represents the reverse process of sorption.
Data Source
AI summary
A sorption filter cartridge for a sorption filter element includes a fluid permeable housing. The housing encloses a plurality of housing rooms that are separated from each other. Each housing room receives at least two layers of non-woven fiber material and a granulate portion comprising at least one sorbent. The granulate portion is sandwiched between the at least two layers.