Air-conditioning control device
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Solution Overview
Problem
Conventional air-conditioning control apparatuses fail to accurately adjust the compressor rotation speed during the preceding operation, leading to potential failure in reaching the target room temperature at the specified time.
Innovation Solution
The air-conditioning control apparatus adjusts the time change rate of the set temperature during the preceding operation to ensure the room temperature reaches the target temperature at the specified time by using a combination of proportional, integral, and derivative control methods, based on current and expected room temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the compressor rotation speed is corrected only after the preceding operation based on accumulated operation data, then the control system remains simple, but the room temperature may fail to reach the target temperature at the specified time
Solution Approach 1:
The patent applies preliminary action by correcting the time change rate of set temperature during the preceding operation itself, rather than waiting until after the operation completes. The correction is performed in real-time based on actual room temperature changes, allowing the system to proactively adjust to ensure the target temperature is reached at the specified time, eliminating the need for post-operation corrections.
Solution Approach 2:
The patent implements feedback by continuously monitoring the actual room temperature during the preceding operation and comparing it with the expected temperature change. The time change rate of set temperature is dynamically corrected based on this feedback, creating a closed-loop control system that ensures accurate temperature control while maintaining system simplicity.
2Use of energy by moving object
If the compressor is driven at a rotation speed based on previous operation results, then energy consumption is reduced, but the room temperature might not reach the target temperature at the specified time
Solution Approach 1:
The patent applies dynamics by making the set temperature time change rate adjustable during the preceding operation. Instead of using a fixed rotation speed or static control parameters, the system dynamically modifies the time change rate of set temperature based on actual room temperature measurements, allowing optimal balance between energy consumption and temperature control accuracy.
Solution Approach 2:
The patent implements parameter changes by modifying the time change rate of set temperature as a control parameter during the preceding operation. This parameter adjustment allows the system to adapt to actual thermal conditions, ensuring both energy efficiency and reliable temperature control without requiring complex hardware modifications.
Data Source
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AI summary
An air-conditioning control apparatus that controls an air-conditioner 63 and performs a preceding operation of previously starting the air-conditioner 63 for precooling or preheating, includes a set temperature determination section configured to determine a predetermined time during which a current set temperature is maintained and a subsequent set temperature, and a refrigeration cycle controller 5 configured to control the air-conditioner 63 based on a current set temperature. The set temperature determination section obtains a time change rate of a set temperature based on a current room temperature, and obtains the predetermined time and the subsequent set temperature based a current set temperature and a time change rate of the set temperature.