Dual-Adsorption Cabin Air Recirculation for CO2 and Fogging Control
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Solution Overview
Problem
Current cabin air recirculation systems in vehicles face challenges such as reduced vehicle range due to high power consumption, fogging issues from water vapor, and carbon dioxide buildup leading to driver fatigue, while being complex and difficult to assemble.
Innovation Solution
An integrated cabin air recirculation system with dual adsorption units, heaters, and flap systems that selectively control air flow and regeneration modes to filter and adsorb moisture and carbon dioxide, reducing external circulation time and improving air quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HVAC system operates in external circulation mode, then the air quality is maintained, but the power consumption increases and vehicle range decreases
Solution Approach 1:
The system uses periodic action by switching between two adsorption units - one unit adsorbs water vapor and CO2 while the other is regenerated by the heater. This periodic switching allows continuous air purification with minimal energy input, resolving the contradiction between maintaining air quality and reducing power consumption.
Solution Approach 2:
The system implements self-service through the dual-unit design where one unit serves the adsorption function while the other undergoes regeneration. This self-contained cycle eliminates the need for continuous high-power operation, significantly reducing energy consumption while maintaining effective air purification.
2Use of energy by moving object
If the HVAC system operates in air recirculation mode, then the power consumption is reduced, but water vapor causes fogging on glass
Solution Approach 1:
The system extracts water vapor and CO2 from the recirculated air using the adsorption units. By removing these harmful substances through chemical adsorption, the system maintains low power consumption while preventing fogging on glass surfaces.
3Use of energy by moving object
If the HVAC system operates in air recirculation mode, then the power consumption is reduced, but carbon dioxide accumulates causing driver fatigue
Solution Approach 1:
The adsorption units extract CO2 from the recirculated air along with water vapor. This selective removal of harmful gases allows the system to maintain low power consumption while preventing CO2 accumulation and driver fatigue.
4Object-affected harmful factors
If continuous defogging mode is used, then fogging is prevented, but power consumption increases and vehicle range decreases
Solution Approach 1:
The system performs preliminary action by adsorbing water vapor from the air before it can condense and cause fogging. This proactive removal of moisture prevents fogging from occurring in the first place, eliminating the need for continuous high-power defogging operations.
5Reliability
If current cabin air recirculation systems are used, then air purification is achieved, but the structure is complicated and assembly is difficult
Solution Approach 1:
The system merges multiple functions into an integrated housing structure that contains both adsorption units, flaps, and heaters in a single compact assembly. This consolidation simplifies the overall structure and makes assembly easier while maintaining effective air purification functionality.
Solution Approach 2:
The housing structure serves multiple functions simultaneously - it contains the adsorption units, provides pathways for air flow, houses the flap mechanisms, and accommodates the heaters. This multi-functionality reduces the number of separate components needed, simplifying both manufacturing and assembly.
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 system reduces energy consumption, enhances vehicle range, prevents fogging, and maintains air quality by continuously adsorbing and regenerating air, while being simple in structure and easy to assemble.
Implementation Method 1
a first adsorption unit and a second adsorption unit respectively disposed in the first adsorption unit chamber and the second adsorption unit chamber, each of the first adsorption unit and the second adsorption unit is configured to adsorb moisture and/or or carbon dioxide
Implementation Method 2
a first heater and a second heater disposed in the first passage and the second passage respectively, the first heater and the second heater configured to heat the air delivered to the first adsorption unit and the second adsorption unit, respectively, which are used to regenerate the first adsorption unit and the second adsorption unit respectively
Data Source
AI summary
A cabin air recirculation system includes an upper housing, a lower housing, a first adsorption unit and a second adsorption unit, each of the first adsorption unit and the second adsorption unit being configured to adsorb moisture and/or carbon dioxide. The cabin air recirculation system further includes a first heater and a second heater configured to heat air delivered to the first adsorption unit and the second adsorption unit, respectively, which is used to regenerate the first adsorption unit and the second adsorption unit, respectively.