Air conditioning controller and air conditioning system
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Solution Overview
Problem
Conventional air conditioning controllers face challenges in efficiently controlling the contact between movable and stationary terminals in relays, leading to potential unexpected operation of air conditioners during installation, relocation, and updates, which can cause reliability issues and user discomfort due to snapping sounds.
Innovation Solution
An air conditioning controller with a mechanical relay and a processor that performs boot processing, energizing the drive coil to move the movable terminal to a predetermined position based on switch avoidance conditions, ensuring the relay remains in the initial state during certain conditions to prevent unexpected operation and minimize snapping sounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the processor moves the movable terminal to the predetermined position during boot processing, then the air conditioner is reliably shut off, but the relay switches unnecessarily during updates causing snapping sounds
Solution Approach 1:
The system checks the power-off duration before moving the relay terminal during boot processing. When the power-off duration is shorter than a predetermined threshold (indicating an update scenario), the system preliminarily determines to skip the relay switching action, thereby preventing snapping sounds while maintaining reliability when needed.
2Reliability
If the processor always moves the movable terminal to the predetermined position during boot processing, then unexpected operation is prevented, but power is wasted due to unnecessary switching
Solution Approach 1:
The system preliminarily checks the power-off duration against a predetermined threshold before executing the relay switching operation. This preliminary assessment allows the system to skip unnecessary switching actions during updates, conserving power while maintaining safety when the power-off duration exceeds the threshold.
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 solution enhances the reliability of the air conditioning system by preventing unexpected starts during installation or relocation and reduces user discomfort by minimizing snapping sounds during updates or reboots, while also optimizing power usage by avoiding unnecessary switching.
Implementation Method 1
a drive coil configured to move the movable terminal to a position in contact with the stationary terminal and a position out of contact with the stationary terminal
Data Source
AI summary
An air conditioning controller according to an embodiment includes: a mechanical relay including a movable terminal, a stationary terminal, and a drive coil; a memory; and a processor. The air conditioning controller sends a control signal through the mechanical relay to an air conditioner. The processor performs boot processing for the air conditioning controller and energizes the drive coil to move the movable terminal to a predetermined position. The predetermined position is a position corresponding to transmission of a shutoff control signal for shutting off the air conditioner. At the boot processing, the processor does not move the movable terminal to the predetermined position if a switch avoidance condition is satisfied; otherwise, the processor moves the movable terminal to the predetermined position.