Air Preparation Device with Dynamic Flushing Medium Control
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Solution Overview
Problem
Existing air treatment devices struggle to consistently maintain low carbon dioxide levels in indoor air, particularly in crowded spaces, due to the saturation of carbon dioxide adsorption devices, which require regeneration but often result in suboptimal oxygen content and inefficient regeneration processes.
Innovation Solution
An air treatment device with a control system that regulates a flushing medium to optimize the regeneration of carbon dioxide adsorption units by adjusting the composition of the flushing medium based on state variables, ensuring the adsorption units maintain optimal performance and produce air with a consistent oxygen content of 20-22% by volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carbon dioxide adsorption device is regenerated with a flushing medium, then the carbon dioxide adsorption capacity is restored, but the oxygen content in the adsorption unit may become too low and the medium quality insufficient
Solution Approach 1:
A replacement medium is supplied to the carbon dioxide adsorption unit before the flushing medium is introduced for regeneration. This preliminary action ensures that when the flushing medium is later introduced and then discharged, the oxygen content and medium quality meet required specifications, preventing the oxygen content from becoming too low during the regeneration process.
Solution Approach 2:
The replacement medium acts as an intermediary substance that prepares the adsorption unit for regeneration. It is introduced first to displace air and create appropriate conditions, then the flushing medium is introduced for actual regeneration, and finally the replacement medium is supplied again to restore proper oxygen content before the unit returns to service.
2Productivity
If the flushing medium is supplied to regenerate the carbon dioxide adsorption units, then the adsorption performance is improved, but the composition of the flushing medium may not be optimized for different operating conditions
Solution Approach 1:
The composition of the flushing medium is made dynamic and adjustable based on operating conditions. The control device regulates the flushing medium composition taking state variables into account, allowing the system to adapt the flushing medium properties (such as temperature, pressure, or chemical composition) to optimize regeneration performance under different operating conditions.
Solution Approach 2:
The physical or chemical parameters of the flushing medium are changed based on the regeneration needs and operating conditions. The control device adjusts parameters such as temperature, pressure, or flow rate of the flushing medium to optimize the regeneration process and ensure consistent air quality output.
3Reliability
If the carbon dioxide adsorption device operates continuously, then the air quality is maintained, but the adsorption units become saturated and require regeneration which interrupts operation
Solution Approach 1:
The carbon dioxide adsorption device is divided into multiple adsorption units that can operate in parallel. While one unit is adsorbing carbon dioxide to maintain air quality, another unit can be regenerated without interrupting the overall operation. This segmentation allows continuous air treatment by alternating between adsorption and regeneration phases across different units.
Solution Approach 2:
The adsorption units operate in periodic cycles of adsorption and regeneration. Each unit alternates between adsorbing carbon dioxide from the air stream and being regenerated with the flushing medium. This periodic action ensures that at least one unit is always in the adsorption phase, maintaining continuous air quality while allowing regular regeneration of all units.
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 ensures continuous operation by maintaining the adsorption units' effectiveness, preventing low oxygen levels and optimizing regeneration efficiency, thereby ensuring high-quality air output with reduced carbon dioxide content.
Implementation Method 1
carbon dioxide adsorption devices, which can filter out carbon dioxide from air or other gases. Such filters can bind the carbon dioxide in a corresponding adsorbent
Implementation Method 2
The regeneration can take place, for example, with a flushing medium which is passed through the carbon dioxide adsorption device or the adsorbent in order to extract the carbon dioxide from the adsorbent
Data Source
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AI summary
The invention relates to an air treatment device and an air treatment method for producing air with a reduced carbon dioxide content using a carbon dioxide adsorption device that can be regenerated with a flushing medium. The flushing medium can be replaced with a substitute medium based on the composition of the outgoing medium in order to achieve a predetermined target composition.