Air supply system
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Solution Overview
Problem
The existing air supply systems with multiple fan units face increased control load due to a single controller managing the rotational speed of each fan unit based on air flow volume signals from multiple sensors.
Innovation Solution
The proposed air supply system includes a first unit with a first fan, a second unit with a second fan, a duct connecting them, and controllers to manage air flow volumes independently, reducing the control load on the primary controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a single controller manages the rotational speed of each fan unit based on air flow volume signals from multiple sensors, then centralized control is achieved, but the control load on the controller is increased
Solution Approach 1:
The control system is segmented into a main controller that determines target air flow volumes and individual unit controllers that independently control each second fan's rotational speed. This segmentation distributes the control load from the main controller to multiple unit controllers, reducing the main controller's burden while maintaining centralized coordination through target value assignment.
Solution Approach 2:
Each second unit becomes self-sufficient by having its own controller that autonomously adjusts the second fan's rotational speed based on the target air flow volume received from the main controller. The unit controller independently manages the air flow without requiring continuous intervention from the main controller, enabling self-service operation.
2Stability of the object's composition
If a single controller controls multiple fan units, then system coordination is maintained, but the control response time is delayed
Solution Approach 1:
The control function is divided between the main controller that sets target values and unit controllers that execute real-time adjustments. This segmentation allows unit controllers to respond immediately to air flow deviations without waiting for main controller commands, reducing response time while the main controller maintains overall system coordination through target value management.
Solution Approach 2:
The main controller preliminarily determines and transmits target air flow volumes to unit controllers in advance. This preliminary action enables unit controllers to have ready-reference target values for immediate comparison with actual air flow measurements, facilitating faster control responses without compromising system-wide coordination.
3Measurement precision
If the main controller continuously monitors air flow volume signals from multiple sensors, then air flow control precision is improved, but the control load on the main controller is increased
Solution Approach 1:
The air flow monitoring and control execution functions are extracted from the main controller and assigned to individual unit controllers. Each unit controller independently monitors air flow volume signals from its associated sensors and executes control adjustments, extracting this workload from the main controller while maintaining precise air flow control at the unit level.
Solution Approach 2:
Each second unit performs self-monitoring of air flow volume signals and self-control of fan rotational speed through its dedicated unit controller. This self-service approach maintains precise air flow control without requiring the main controller to continuously monitor all sensors, thereby reducing the main controller's load while preserving measurement precision.
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
This configuration allows for efficient control of air flow volumes in each second unit without relying on the primary controller, thereby reducing the overall control load and enhancing system efficiency.
Implementation Method 1
a first fan that sends first air
Implementation Method 2
a second fan that sends the first air to a target space
Implementation Method 3
a heat exchanger through which a heat medium flows. The heat exchanger causes heat to be exchanged between the first air sent by the first fan and the heat medium
Data Source
AI summary
An air supply system moderates excess energy consumption occurring in fans. A second unit includes a second fan that supplies first air to a target space. A duct sends the first air sent from a first unit by a first fan to the second unit. A remote sensor acting as a first detector detects information about second air in the target space. A main controller acting as a first controller communicates with the second unit and the remote sensor. The second unit includes a second detector that detects the air flow volume sent by the second fan, and a sub-controller acting as a second controller that controls the rotation speed of the second fan. The main controller determines a target air flow volume of the second unit on the basis of the information about the second air acquired from the remote sensor, and transmits an instruction indicating the target air flow volume to the sub-controller. The sub-controller controls the rotation speed of the second fan such that the air flow volume detected by the second detector approaches the target air flow volume.