Duct control apparatus
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Solution Overview
Problem
Conventional duct control apparatuses do not have the capability to adjust the degree of opening of the duct opening and closing devices, which limits the control over airflow distribution.
Innovation Solution
A duct control apparatus that includes a power supply board, a motor board, and a control board, all integrated into a single unit, which controls the motor that operates the duct opening and closing device, allowing for adjustments in the degree of opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional duct control apparatus is used, then the duct opening and closing device can be opened and closed, but the degree of opening cannot be adjusted
Solution Approach 1:
The motor board is designed to control multiple motors (first motor and second motor) with a single control unit, enabling the system to perform multiple functions including opening/closing control and degree of opening adjustment. This multi-functionality approach allows the duct control apparatus to adjust the opening degree of multiple duct opening and closing devices without requiring separate control systems for each device.
2Productivity
If multiple duct opening and closing devices are controlled simultaneously, then all ducts can be adjusted, but power supply capacity may be insufficient
Solution Approach 1:
The control board determines the operating status of each duct opening and closing device before initiating motor operation. By preliminarily identifying which devices are closed and need to be opened, the system can prioritize power allocation to essential devices first, then sequentially control other devices based on available power capacity, preventing power overload while ensuring critical airflow control.
3Device complexity
If integrated unit design is used for power supply board, motor board, and control board, then system integration is improved, but manufacturing and repair complexity increases
Solution Approach 1:
The control apparatus is divided into three distinct functional boards: power supply board, motor board, and control board. Each board performs a specific function and can be manufactured, tested, and replaced independently. This segmentation allows for standardized production of each module while maintaining high system integration, as the boards connect through defined interfaces.
4Device complexity
If motor board controls multiple motors, then system simplicity is improved, but control precision for each motor may be reduced
Solution Approach 1:
The motor board implements dedicated control circuits for each motor (first motor control circuit and second motor control circuit), with each circuit optimized for its specific motor's characteristics. This local quality approach ensures that each motor receives precise control tailored to its specific requirements, maintaining high control precision despite the single control board architecture.
Data Source
AI summary
A first duct control apparatus is an apparatus that controls a motor that controls opening and closing of a duct opening and closing device provided in a duct for sending air from an air conditioner to a room, and includes: a power supply board that receives commercial power; a motor board that controls the motor based on the commercial power received by the power supply board; and a control board that controls the motor board based on the commercial power received by the power supply board. The motor board performs, for the motor, control of the opening and closing of the duct opening and closing device and control for adjusting a degree of opening of the duct opening and closing device. The power supply board, the motor board, and the control board are provided in a single unit.