Air conditioning system
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional air conditioning systems do not adequately address the relationship between heat source operation and heat exchange in utilization heat exchangers, leading to potential malfunctions due to airflow volume issues.
Innovation Solution
An air conditioning system with a heat exchanger unit, ducts, fan units, and actuators, where a main controller adjusts airflow volume through the utilization heat exchanger to meet predetermined conditions, incorporating airflow sensing units to accurately control fan motor speeds and damper openings, ensuring efficient heat exchange and preventing system malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the air conditioning system supplies conditioned air to multiple places through ducts, then the air conditioning coverage is improved, but the airflow volume through the utilization heat exchanger may become insufficient causing heat source malfunction
Solution Approach 1:
The system employs airflow volume sensing units to detect the actual airflow volume through each duct and provides feedback to the main controller. The main controller calculates the total airflow volume and compares it against predetermined conditions, then adjusts fan motor speeds accordingly to maintain reliable heat source operation while serving multiple areas.
Solution Approach 2:
The system dynamically changes the operating parameters of fan motors by adjusting their rotation speeds based on detected airflow volume. This parameter adjustment ensures that the total airflow volume through the utilization heat exchanger maintains a predetermined relationship with the heat source output, preventing malfunction while accommodating multiple air conditioning targets.
2Reliability
If the system controls airflow volume to prevent heat source malfunction, then the system reliability is improved, but the control complexity increases
Solution Approach 1:
The main controller performs multiple functions: it controls fan motor speeds, calculates total airflow volume from individual duct measurements, determines appropriate rotation speeds based on heat source output relationships, and ensures predetermined airflow conditions are met. This multi-functionality manages control complexity through centralized intelligence.
3Measurement precision
If airflow volume sensing units are installed in each duct, then the measurement precision of airflow volume is improved, but the device complexity and cost increase
Solution Approach 1:
The system divides the air conditioning network into separate measurement zones, placing airflow volume sensing units in individual ducts. Each sensing unit independently measures airflow in its specific duct, and the main controller aggregates these individual measurements to calculate the total airflow volume through the utilization heat exchanger, achieving precise measurement without requiring a single complex measurement system.
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 inhibits malfunctions by maintaining optimal airflow volume through the heat exchanger, ensuring efficient heat exchange and reducing energy consumption while aligning with user requests.
Implementation Method 1
generate conditioned air through heat exchange in the utilization heat exchanger
Implementation Method 2
fan unit provided correspondingly to the duct and configured to supply the air conditioning target space with the conditioned air from the heat exchanger unit through the duct
Data Source
AI summary
An air conditioning system configured to supply a plurality of places in a building with conditioned air with use of ducts inhibits malfunction of the air conditioning system due to airflow volume through a utilization heat exchanger. A heat exchanger unit includes a utilization heat exchanger. The heat exchanger unit is connected with a plurality of ducts. A plurality of fan units sucks conditioned air from the heat exchanger unit through the plurality of ducts and supplies a plurality of blow-out ports with the conditioned air. The fan units include fan motors as a plurality of actuators configured to individually change supply air volume of the conditioned air. A main controller controls the plurality of fan motors such that airflow volume through the utilization heat exchanger satisfies a predetermined condition.