Air Conditioner Multi-Time-Scale Control for Response Time Matching
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Solution Overview
Problem
Existing air conditioner control methods do not adequately consider the difference in response times between indoor temperature and air conditioning system state, leading to excessively long or short control time scales that affect operation reliability and energy efficiency.
Innovation Solution
Implementing a control method that recognizes response times for indoor and terminal temperatures using multiple time scales, applying different control strategies at each adjustment node to match the air conditioner's output capacity with building loads and maintain consistent indoor temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single control time scale is used for air conditioner operation parameters, then the control system is simple to implement, but it cannot accurately match the different response times of indoor temperature and terminal temperature, leading to excessive energy consumption and reduced operation reliability
Solution Approach 1:
The control system is segmented into multiple time scales: a first time scale for terminal temperature control and a second time scale for indoor temperature control. This segmentation allows each control loop to operate at its optimal response rate, matching the physical response characteristics of different temperature parameters and reducing energy waste from inappropriate control frequency
Solution Approach 2:
The control system dynamically adjusts the time scale based on the specific parameter being controlled. Terminal temperature uses a faster response time scale while indoor temperature uses a slower scale, allowing the system to adapt its control strategy to the dynamic response characteristics of different thermal zones
2Reliability
If a single control time scale is used for air conditioner operation parameters, then the control strategy is easy to implement, but it leads to excessively long or short control time scales that reduce operation reliability
Solution Approach 1:
The control strategy is segmented into distinct time scale loops: a first control strategy operating at a faster time scale for terminal temperature and a second control strategy at a slower time scale for indoor temperature. This segmentation ensures each control loop operates within appropriate time boundaries, preventing both overly aggressive and overly sluggish control actions that would compromise reliability
Solution Approach 2:
The system changes the time scale parameter based on which temperature parameter is being controlled. Terminal temperature control uses a shorter time interval allowing faster response, while indoor temperature control uses a longer time interval for smoother, more stable adjustments, optimizing reliability for each thermal parameter
3Productivity
If a single control time scale is used for air conditioner operation parameters, then the control system is simple to implement, but it cannot accurately match output capacity with building loads, reducing energy efficiency
Solution Approach 1:
The control system segments the building load management into two hierarchical levels: terminal temperature control at the equipment level with faster response, and indoor temperature control at the space level with slower response. This hierarchical segmentation enables precise matching of air conditioner output capacity to actual building loads at different time scales, significantly improving energy efficiency
Solution Approach 2:
The faster terminal temperature control loop can make preliminary adjustments to system capacity before the slower indoor temperature loop detects larger deviations. This preliminary action allows the system to respond proactively to load changes, optimizing energy efficiency by avoiding oversized cycling and maintaining smoother operation
Data Source
AI summary
Provided in the present disclosure are an air conditioner and a control method therefor, and a storage medium. The control method for an air conditioner includes collecting a time series of operation data of an air conditioner; recognizing response time of an indoor temperature and response time of a terminal temperature according to the time series of the operation data, and setting the response time of the indoor temperature as a time interval for adjustment nodes of a first time scale and the response time of the terminal temperature as a time interval for adjustment nodes of a second time scale. At each of the adjustment nodes of the first time scale, controlling operation parameters of the air conditioner by applying a first control strategy. At each of the adjustment nodes of the second time scale, controlling the operation parameters of the air conditioner by applying a second control strategy.