NBC Vehicle Air Quality Control via CO2 Sensor Feedback
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Solution Overview
Problem
In NBC-tight vehicles or laboratories, the oxygen content decreases over time due to a lack of fresh air, necessitating either removal from the danger zone for ventilation or high-energy operation of the NBC protective ventilation system, which is not always feasible.
Innovation Solution
Implementing CO2 sensors to monitor air quality, allowing for timely warnings and automatic control of the NBC protective ventilation system, switching between supply air and recirculated air modes, and monitoring filter saturation with minimal energy consumption, thereby eliminating the need for a pressure difference sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the NBC protective ventilation system is operated continuously to ensure sufficient ventilation, then the air quality in the vehicle interior is maintained, but the energy consumption increases significantly
Solution Approach 1:
The patent employs CO2 sensors to continuously monitor the air quality in the vehicle interior and uses this feedback information to control the ventilation system. The control unit activates the NBC protective ventilation system only when the CO2 concentration exceeds a predetermined threshold, rather than operating continuously. This feedback-based control strategy maintains air quality reliability while significantly reducing energy consumption by operating the ventilation system only when necessary.
2Reliability
If the vehicle is taken out of the danger zone for ventilation, then the air quality improves, but the operational availability and response time decrease
Solution Approach 1:
The patent introduces CO2 sensors as an intermediary monitoring device that can detect air quality degradation within the sealed vehicle interior without requiring the vehicle to leave the danger zone. The sensors provide real-time information about air quality status, enabling the vehicle to remain in position while still monitoring and managing ventilation needs, thus eliminating the time loss associated with moving the vehicle out for ventilation.
3Reliability
If the NBC protective ventilation system is activated to maintain overpressure, then protection against warfare agents is ensured, but the energy requirement increases
Solution Approach 1:
The patent uses CO2 concentration measurements as feedback to control the activation of the NBC protective ventilation system. Instead of maintaining continuous overpressure through constant operation, the system activates only when CO2 levels indicate degraded air quality. This feedback-controlled approach ensures protection reliability is maintained while minimizing energy requirements by operating the ventilation system only when air quality degradation is detected.
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
Ensures sufficient ventilation of the interior with high-quality air while reducing energy consumption and providing a leak warning in the refrigerant circuit, with CO2 sensors also indicating when filters need changing.
Implementation Method 1
One or more sensors inside the vehicle housing monitor the concentration of carbon dioxide as a guide gas for air quality
Data Source
Figure 1
AI summary
The automatic backwashable cartridge (ABC)-density vehicle or lab (10), has an ABC-protective aeration arrangement (5), an ABC-filter (8), a regulator or controller (1), which is connected with multiple carbon dioxide-sensors (2) within a vehicle interior (3) and a storage (4). The storage with threshold values of air quality of a vehicle interior is described by the carbon dioxide-content in the air and chemical sensors (6) outside and inside the vehicle. An independent claim is included for a method for the regulation of the air quality in an automatic backwashable cartridge (ABC)-density vehicle or lab.