Ventilation and air conditioning system
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Solution Overview
Problem
Conventional ventilation and air conditioning systems can cause condensation and mold growth in rooms due to temperature and humidity imbalances, leading to issues when cooler air is distributed from an air conditioning room to other rooms.
Innovation Solution
A system comprising air conditioners, transfer air fans, room temperature and humidity sensors, and a system controller that calculates dew point temperatures and adjusts airflow to prevent condensation by controlling fan airflow based on determinations of condensation risk and humidity levels across rooms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the air conditioner cools the air in the air conditioning room and distributes it to other rooms, then the cooling effect is improved, but condensation occurs when the air temperature is lower than the dew point temperature
Solution Approach 1:
The system performs preliminary calculation of dew point temperature based on room temperature and humidity before air distribution. The condensation determiner predicts whether condensation will occur by comparing the air conditioning room temperature with the calculated dew point temperature, enabling preventive control actions to be taken before condensation actually happens.
Solution Approach 2:
The system continuously monitors room temperature and humidity using sensors, calculates dew point temperature in real-time, and adjusts the airflow control based on the condensation risk determination. This closed-loop feedback mechanism allows the system to dynamically respond to changing environmental conditions and prevent condensation while maintaining cooling effectiveness.
2Productivity
If the transfer air fan delivers cool air from the air conditioning room to other rooms, then the air distribution efficiency is improved, but condensation and mold growth occur in rooms with high humidity
Solution Approach 1:
The system calculates dew point temperature and determines condensation risk before air is delivered to rooms. By performing this preliminary assessment, the system can adjust airflow control in advance to prevent condensation that would lead to mold growth, while still maintaining efficient air distribution to meet cooling demands.
Solution Approach 2:
The airflow control is adjusted locally for each room based on its specific humidity conditions and calculated dew point temperature. The system applies different control strategies to different rooms depending on their individual condensation risk, allowing efficient air distribution in low-risk rooms while preventing condensation in high-risk rooms.
3Adaptability or versatility
If the system distributes air from the air conditioning room to multiple rooms independently, then the temperature control flexibility is improved, but condensation risk increases when outdoor air temperature is low
Solution Approach 1:
Before air is distributed to any room, the system preliminarily calculates the dew point temperature based on the target room's temperature and humidity conditions. This advance calculation allows the system to assess condensation risk for each room independently and adjust airflow control accordingly, maintaining temperature control flexibility while preventing condensation even when outdoor temperatures are low.
Solution Approach 2:
The system dynamically adjusts airflow control parameters based on changing environmental conditions including outdoor temperature, room temperature, and humidity. By modifying these parameters in response to dew point temperature calculations, the system maintains adaptable temperature control while preventing condensation across varying operational conditions.
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 system effectively reduces condensation occurrences by optimizing airflow to match temperature and humidity conditions in each room, preventing mold growth and improving indoor air quality.
Implementation Method 1
The dew point temperature calculator calculates, for each of the plurality of rooms, the dew point temperature in said room on the basis of the temperature in said room that has been received from the room temperature sensor corresponding to said room and the humidity in said room that has been received from the room humidity sensor corresponding to said room
Implementation Method 2
The condensation determiner determines, for each of the plurality of rooms, whether or not condensation is to occur when the air in the air conditioning room is delivered to said room, on the basis of the dew point temperature in said room that has been calculated by the dew point temperature calculator and the temperature in the air conditioning room that has been received from the air conditioning room temperature sensor
Implementation Method 3
The fan airflow controller controls, for each of the plurality of rooms, the airflow of a transfer air fan corresponding to said room, in accordance with the result of the determination made by the condensation determiner for said room
Data Source
AI summary
A ventilation and air conditioning system includes: an air conditioner that cools air in an air conditioning room; a plurality of transfer air fans that are installed for a plurality of rooms, which are independent of the air conditioning room, in one-to-one correspondence and each deliver the air in the air conditioning room to a corresponding room; and a system controller. For each of the plurality of rooms, the system controller calculates a dew point temperature in the room on the basis of the temperature and the humidity in the room, determines, on the basis of the calculated dew point temperature in the room and the temperature in the air conditioning room, the occurrence of condensation resulting from delivery of the air in the air conditioning room to the room, and controls, according to the result of the determination, the airflow of the transfer air fan corresponding to the room.