Indoor Air Quality Control Using CO₂ Feedback and Historical Data
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Solution Overview
Problem
Existing methods for controlling indoor air quality in buildings without mechanical ventilation systems fail to notify users of carbon dioxide levels and do not account for historical data to optimize ventilation, leading to inadequate air quality management.
Innovation Solution
A method that uses carbon dioxide and temperature sensors to provide real-time alerts and adaptively determine optimal ventilation times by defining and updating carbon dioxide concentration thresholds, allowing users to take action to improve indoor air quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If carbon dioxide sensors and temperature sensors are used to monitor indoor air quality, then air quality can be detected and measured, but users are not notified of the instantaneous values and cannot take actions to improve air quality
Solution Approach 1:
The patent implements a feedback mechanism by notifying users of instantaneous carbon dioxide concentration values through visual or acoustic signals. The system continuously monitors CO2 levels and provides real-time feedback to users, enabling them to understand the current air quality status and take appropriate actions such as opening windows for ventilation.
2Measurement precision
If carbon dioxide concentration values are monitored continuously, then instantaneous air quality can be quantified, but historical concentration levels are not considered and optimized thresholds cannot be developed
Solution Approach 1:
The patent stores historical carbon dioxide concentration values and temperature values in a database for future reference. By preserving this historical data, the system can later analyze patterns, determine optimal ventilation timing, and develop environment-specific concentration thresholds without requiring preliminary calibration.
3Loss of information
If users are notified of carbon dioxide levels, then users can be aware of air quality, but users lack tools to assess what actions to take and when to open windows
Solution Approach 1:
The system provides not only notification of current CO2 levels but also recommendations for user actions. By analyzing the relationship between CO2 concentration, temperature, and ventilation timing, the system guides users on when and how long to open windows, making the corrective action process simple and effective.
4Adaptability or versatility
If the system adapts to specific environment conditions and user habits, then optimal ventilation can be achieved, but the system requires learning and adaptation time
Solution Approach 1:
The patent stores historical data from the beginning without requiring preliminary calibration. The system learns environment-specific characteristics and user habits over time by continuously recording and analyzing CO2 concentration and temperature data, gradually optimizing ventilation recommendations for each specific environment.
5Productivity
If the system provides precise ventilation recommendations, then air quality can be improved efficiently, but the system complexity increases
Solution Approach 1:
The patent uses a multi-functional approach where a single control unit performs multiple tasks: monitoring CO2 concentration, monitoring temperature, storing historical data, analyzing patterns, generating notifications, and providing ventilation recommendations. This universal system achieves precise ventilation guidance without requiring multiple separate complex devices.
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
Enables users to be instantly notified of air quality levels and adapt to specific conditions, ensuring effective natural ventilation and improving indoor air quality without requiring preliminary calibration or knowledge of the environment's characteristics.
Implementation Method 1
A carbon dioxide sensor is known in the art to be used to measure and quantify air quality in the indoor environment. Such carbon dioxide sensor is configured to detect an instantaneous value of carbon dioxide concentration in the air of the indoor environment
Implementation Method 2
A temperature sensor is also known in the art, which is configured to detect an instantaneous temperature value of air in an indoor environment of a building
Data Source
Figure 1
AI summary
A method of controlling air quality in an indoor environment of a building by a system (10) that comprises a carbon dioxide sensor (2) configured to detect an instantaneous value of carbon dioxide concentration in the air of the indoor environment of the building, a control unit (5) in signal communication with the carbon dioxide sensor (2), a communication unit (4) for establishing signal communication between the carbon dioxide sensor (2) and the control unit (5), a storage unit (6) in signal communication with the control unit (5), the method comprising the steps of: a) defining and storing in the storage unit (6), by the control unit (5), control values of carbon dioxide concentration; b) detecting, by the carbon dioxide sensor (2), an instantaneous value of carbon dioxide concentration and sending, by the communication unit (4), the instantaneous carbon dioxide concentration value to the control unit (5), c) processing, by the control unit (5), the control values and the instantaneous values of carbon dioxide concentration to generate an output signal representative of the processing performed by the control unit (5); d) sending, by the control unit (5) the output signal to a visual and/or acoustic warning unit (7).