Ventilation Air Volume Correction for Occupied-Space CO2 Control
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Solution Overview
Problem
The existing air-conditioning system control apparatuses face challenges in accurately reflecting the carbon dioxide concentration in the indoor occupied space due to the installation location of carbon dioxide concentration detection sensors, leading to inadequate ventilation.
Innovation Solution
An air-conditioning system control apparatus that includes a storage device, a computing device, and a ventilation air volume correction coefficient generation part to correct the set ventilation air volume based on operation conditions, previous operation data, and temporal fluctuation data of the ventilation and air-conditioning apparatuses, ensuring more accurate ventilation based on the carbon dioxide concentration in the occupied space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the carbon dioxide concentration detection sensor is installed in the ventilation apparatus, then the device complexity is reduced, but the measurement precision of carbon dioxide concentration in the occupied space deteriorates
Solution Approach 1:
The patent introduces a ventilation air volume correction coefficient as an intermediary parameter that mediates between the sensor location (ventilation apparatus) and the target measurement location (occupied space). This coefficient acts as a correction factor that translates the CO2 concentration measured at the sensor location to reflect the actual CO2 concentration in the occupied space, thereby resolving the measurement precision issue without adding physical sensors to the occupied space.
Solution Approach 2:
The patent creates a virtual representation of the occupied space CO2 concentration by using the ventilation air volume correction coefficient. Instead of directly measuring the CO2 concentration in the occupied space, the system copies the measurement from the ventilation apparatus location and applies correction to replicate what the occupied space CO2 concentration would be, avoiding the need for additional physical sensors.
2Ease of operation
If the ventilation air volume is set based on detection data from the ventilation apparatus, then the ease of operation is improved, but the reliability of ventilation control deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the ventilation air volume correction coefficient is continuously calculated based on the relationship between the set ventilation air volume and the detected CO2 concentration. This feedback loop allows the system to automatically adjust and refine the correction coefficient over time, improving the reliability of ventilation control while maintaining ease of operation through automated adjustment.
Solution Approach 2:
The system performs self-correction by automatically calculating and updating the ventilation air volume correction coefficient based on its own operational data. The control apparatus uses its existing sensors and operational parameters to self-adjust the ventilation control, eliminating the need for manual calibration or additional measurement devices while improving reliability.
Data Source
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AI summary
Provided is an air-conditioning system control apparatus including: a storage device configured to store data to be used for control of a ventilation apparatus and an air-conditioning apparatus; and a computing device configured to generate a control command for controlling the ventilation apparatus and the air-conditioning apparatus based on the data stored in the storage device. The computing unit includes: a ventilation air volume correction coefficient generation part configured to generate a ventilation air volume correction coefficient for correcting a set ventilation air volume based on operation conditions of the ventilation apparatus and the air-conditioning apparatus and previous operation data of the ventilation apparatus and the air-conditioning apparatus; an operation state determination unit configured to correct the set ventilation air volume, which is obtained based on temporal fluctuation data of a carbon dioxide concentration and current operation data of the ventilation apparatus and the air-conditioning apparatus, with the ventilation air volume correction coefficient; and a control command generation unit configured to generate the control command for controlling the ventilation apparatus and the air-conditioning apparatus based on the set ventilation air volume corrected by the operation state determination unit.