V-Shaped Sorption Filter Element for EV Cabin Air Recirculation
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Solution Overview
Problem
In electric vehicles, recirculation mode of air conditioning systems leads to accumulation of water and carbon dioxide in the passenger compartment, causing fogging and potential health hazards due to inadequate dehumidification and air exchange.
Innovation Solution
A sorption filter element with V-shaped sorption bodies and a unique sealing interface, capable of adsorbing and absorbing carbon dioxide, water, and other pollutants, which can be regenerated by applying heat, is designed to reduce these contaminants in the passenger compartment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the air conditioning system recirculates air in the passenger compartment to save energy, then energy consumption is reduced, but water and carbon dioxide accumulate leading to fogging and health hazards
Solution Approach 1:
The filter element is divided into multiple sorption bodies (at least two) arranged in a V-shape, each potentially containing different sorbents for different contaminants. This segmentation allows simultaneous removal of water and carbon dioxide through separate sorption zones within the same filter element, enabling effective recirculation mode operation.
Solution Approach 2:
Different regions of the filter element have different sorption properties. The sorption bodies are configured with specific sorbent materials tailored to their function - some regions optimized for water sorption, others for carbon dioxide sorption. This local differentiation enables the filter to address multiple harmful factors simultaneously while maintaining energy-efficient recirculation.
2Loss of energy
If fresh air intake is reduced to save energy, then energy efficiency improves, but dehumidification capability is lost leading to window fogging
Solution Approach 1:
The dehumidification function is extracted from the traditional evaporator-based condensation system and transferred to a dedicated sorption filter element. The sorbent materials directly absorb water vapor from the recirculated air without requiring the air to pass through a cold evaporator, thereby maintaining dehumidification capability while operating in energy-efficient recirculation mode without fresh air intake.
3Ease of manufacture
If the filter element uses traditional linear arrangement of filter media, then manufacturing is simple, but sealing reliability and contaminant removal efficiency are insufficient
Solution Approach 1:
The sorption bodies are arranged in a V-shape configuration rather than a traditional linear arrangement. This asymmetric geometry creates an intermediate space that is open at the head side, allowing for improved airflow distribution and contaminant removal efficiency. The V-shape also provides stable positioning within the filter housing while maintaining effective sealing through the specific geometric configuration.
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 sorption filter element effectively reduces water and carbon dioxide levels, preventing fogging and health risks, while allowing for reduced fresh air intake, thus enhancing safety and energy efficiency in electric vehicles.
Implementation Method 1
the sorption filter element adsorbs and/or absorbs carbon dioxide and water
Implementation Method 2
the sorption filter element adsorbs and/or absorbs carbon dioxide and water
Implementation Method 3
By applying heat to the sorbent, the adsorbed and/or absorbed substances can be released from the sorbent
Implementation Method 4
In the desorption mode, heat is applied to the sorption filter element, in particular to the sorbent
Data Source
AI summary
A sorption filter element for a sorption filter device includes at least two sorption bodies with at least one sorbent, the at least two sorption bodies being arranged in a V-shape and enclosing an intermediate space that is open at a head side thereof, and an outer sealing element running around an outer circumference of the head side. The sorption filter element further includes an inner sealing surface arranged at the head side and running around a circumference delimiting the intermediate space at the head side, the inner sealing surface being axially set back relative to the outer sealing element and being arranged within the intermediate space.