Dehumidification air conditioning apparatus
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Solution Overview
Problem
Existing dehumidification air conditioning technologies for lithium ion battery manufacturing plants fail to create a low dew point environment with low carbon dioxide levels, making them unsuitable for large workrooms where humans can enter, as they either cannot reduce carbon dioxide levels effectively or require frequent adsorbent exchange.
Innovation Solution
A dehumidification air conditioning apparatus using a pre-cooler followed by a carbon dioxide adsorption rotor and a humidity adsorption rotor, with the air being processed in different zones to achieve low dew point and carbon dioxide levels, and allowing for air recycling or one-pass operation by changing the carbon dioxide adsorption rotor type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a carbon dioxide adsorbent such as sodium hydroxide is used to make low dew point environment with low carbon dioxide levels, then carbon dioxide levels are reduced effectively, but the carbon dioxide adsorbent needs to be exchanged for new adsorbent frequently when adsorption capability declines
Solution Approach 1:
The patent employs a rotating rotor structure that dynamically switches between adsorption and regeneration zones. The rotor continuously rotates to bring fresh adsorbent into the adsorption zone while simultaneously regenerating spent adsorbent in the regeneration zone, enabling continuous operation without frequent manual exchanges.
Solution Approach 2:
The system utilizes periodic rotation of the rotor to alternately expose different sections of the adsorbent bed to the adsorption zone and regeneration zone. This periodic action allows the adsorbent to be regenerated in cycles, maintaining continuous adsorption capability without manual intervention.
2Temperature
If adsorption-type dehumidification air conditioner is used to make low dew point environment, then dew point is controlled accurately, but carbon dioxide levels cannot be made low
Solution Approach 1:
The patent divides the air treatment process into two distinct functional segments: a dehumidification section using a humidity adsorption rotor and a carbon dioxide removal section using a carbon dioxide adsorption rotor. Each rotor is optimized for its specific function, allowing both dew point control and carbon dioxide reduction to be achieved simultaneously.
Solution Approach 2:
The system changes the adsorption parameters by using different adsorbent materials optimized for different targets. The humidity adsorption rotor uses desiccant material for moisture removal, while the carbon dioxide adsorption rotor uses carbon dioxide-specific adsorbent, allowing selective removal of each contaminant.
3Temperature
If liquid nitrogen is made to evaporate to replace air with nitrogen and create low dew point environment, then dew point is lowered effectively, but humans cannot enter the plant
Solution Approach 1:
The patent extracts and removes harmful components (moisture and carbon dioxide) from the air using adsorption rotors, rather than replacing the entire air composition with nitrogen. This extraction approach maintains normal air composition suitable for human breathing while achieving the required low dew point and low carbon dioxide levels.
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 apparatus effectively lowers dew point temperature and carbon dioxide levels in large workrooms, enabling safe human entry while maintaining low humidity, with the ability to recycle air and improve carbon dioxide adsorption capacity through regeneration.
Implementation Method 1
a pre-cooler for cooling open air
Implementation Method 2
passed through an adsorption zone of a carbon dioxide adsorption rotor
Implementation Method 3
passed through an adsorption zone of a humidity adsorption rotor
Data Source
AI summary
Outside air is cooled and dehumidified by a pre-cooler to pass through an adsorption zone of a carbon dioxide adsorbing rotor, producing air having a low carbon dioxide concentration which is cooled by an intercooler. The air that has passed through the intercooler is passed through an adsorption zone of a moisture adsorption rotor and then supplied to a low humidity working chamber. Return air from the low humidity working chamber may be mixed with the air leaving the pre-cooler. A part of the air which passed through the intercooler is branched to pass through a purge zone of the moisture adsorption rotor before being sent to a regeneration zone of the humidity adsorption rotor. Air that passed through the regeneration zone of the humidity adsorption rotor is mixed with outside air and then passed through a regeneration zone of the carbon dioxide adsorption rotor before being exhausted.