Air conditioning system control device, air conditioning system, air conditioning control program, and air conditioning system control method
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Solution Overview
Problem
Air-conditioning systems face challenges in reducing compressor power consumption and maintaining efficient operation, particularly due to the complexity of refrigerant circuit configurations and operational points deviated from optimal efficiency during energy-saving controls.
Innovation Solution
A control device that regulates compressor rotation speed to achieve a predetermined refrigerant operation pressure and adjusts the pressure ratio between high and low pressures to optimize compressor efficiency, allowing for efficient operation and reduced power consumption without altering the compressor's rotation speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pressure regulating control is implemented to ensure performance for multiple indoor units, then air-conditioning performance is maintained, but compressor power consumption increases
Solution Approach 1:
The system changes the target pressure parameter based on indoor load conditions. During energy-saving control when indoor load decreases, the target pressure is adjusted (increased during cooling, decreased during heating) to allow the compressor to operate at lower rotation speeds while maintaining adequate performance, thereby reducing power consumption.
2Use of energy by moving object
If target pressure is adjusted to reduce power consumption, then compressor rotation speed can be reduced, but operational point deviates from efficient operation range
Solution Approach 1:
The system dynamically adjusts the target pressure based on real-time operational conditions and indoor load. This dynamic adjustment allows the compressor to operate at optimized rotation speeds that balance power consumption reduction with maintaining operational efficiency within acceptable ranges.
Solution Approach 2:
The control device continuously monitors operational parameters and adjusts the target pressure accordingly. This feedback mechanism ensures that the compressor operates at optimal points by comparing actual performance with desired performance and making real-time adjustments to maintain efficiency while reducing power consumption.
3Use of energy by moving object
If energy-saving control is implemented by adjusting target pressure, then power consumption decreases, but compressor operates at non-optimal operational point
Solution Approach 1:
The system implements parameter changes in the target pressure based on indoor load conditions. By increasing target pressure during cooling or decreasing it during heating when indoor load is low, the compressor can operate at reduced rotation speeds while maintaining adequate cooling/heating performance, thus reducing power consumption without severely compromising efficiency.
Data Source
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AI summary
An air conditioning control device controls a multi-split air conditioning system so that the operating pressure of refrigerant. remains constant regardless of the indoor load. This air conditioning control device controls the rotational speed of a compressor so that the operating pressure of the refrigerant reaches a predetermined target pressure, and then after this control, controls a pressure ratio, which is the ratio of the high pressure of the refrigerant to the low pressure of the refrigerant, so that compressor efficiency is at an operating point where the efficiency is improved. Thus, the air conditioning control device can reduce compressor power consumption and allow the compressor to operate more efficiently.