Air conditioning system to calculate indoor air quality index to control air ventilation
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Solution Overview
Problem
Conventional air quality improvement technologies focus primarily on PM2.5 concentrations, neglecting other gas concentrations and environmental factors like temperature and humidity, which limits their effectiveness in enhancing indoor air quality.
Innovation Solution
An air conditioning system that incorporates sensors to measure various air quality parameters, including CO2, TVOC, PM, NOX, SOX, O3, mold count, and dust, along with temperature and humidity, to calculate a comprehensive air quality index, which is used to control ventilators and air conditioners for optimal indoor air quality management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If air quality control is based only on PM2.5 concentration, then the control system is simple, but the air quality improvement effectiveness is insufficient
Solution Approach 1:
The patent changes the control parameter from a single PM2.5 concentration measurement to a comprehensive air quality index that incorporates multiple parameters including CO2 concentration, TVOC, PM2.5, temperature, and humidity. This multi-parameter approach resolves the contradiction by expanding the measurement basis while maintaining systematic control through index integration.
Solution Approach 2:
The patent creates a composite air quality index that integrates multiple air quality parameters and environmental factors. Similar to how composite materials combine different materials to achieve superior properties, this composite index combines PM2.5, CO2, TVOC, temperature, and humidity data to provide a comprehensive assessment of indoor air quality, thereby improving effectiveness without excessive complexity.
2Reliability
If multiple air quality parameters are measured and considered, then air quality improvement effectiveness increases, but the measurement and control system becomes more complex
Solution Approach 1:
The patent implements a universal air quality index that can accommodate multiple different parameters (CO2, TVOC, PM2.5, temperature, humidity) within a single integrated framework. This multi-functional index serves as a universal metric for assessing various aspects of indoor air quality simultaneously, reducing the need for separate control systems for each parameter.
Solution Approach 2:
The patent merges multiple independent air quality measurements (PM2.5 concentration, CO2 concentration, TVOC, temperature, humidity) into a single integrated air quality index. This combining approach allows the system to consider multiple factors for improved effectiveness while presenting a unified control target, thereby managing system complexity through integration rather than multiplication of separate control loops.
Data Source
AI summary
An air conditioning system includes: a sensor; an obtainer that obtains information indicating air quality in an indoor space, which is output by the sensor; and a controller that calculates an air quality index based on the information obtained, and controls a ventilator, based on the air quality index calculated. The air quality index is expressed by f(Xn)×g(T, H), where f(Xn) denotes a function with respect to Xn that indicates at least one of a CO2 concentration, a concentration of total volatile organic compounds (TVOC), a concentration of particulate matter (PM), an NOX concentration, an SOX concentration, an O3 concentration, a mold count, or a dust count, and g(T, H) denotes a function with respect to T denoting temperature and H denoting humidity in the indoor space.