Air conditioner and control system
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Solution Overview
Problem
Air conditioners face challenges in maintaining optimal voltage input, as they do not perform operations according to varying input voltage magnitudes, leading to deviations from predetermined voltage ranges, which can result in inefficient power supply and harmonic generation.
Innovation Solution
An air conditioner system with a voltage information acquisition section, a supply section for fundamental reactive power, and a control section that adjusts the supply of reactive power based on input voltage magnitude, allowing for harmonic suppression and optimal voltage adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the air conditioner does not perform operation according to the magnitude of input voltage, then the device complexity is reduced, but the voltage stability deteriorates and voltage deviations occur
Solution Approach 1:
The control section continuously monitors the magnitude of input voltage and adjusts the reactive power supply accordingly. When voltage deviation is detected, the system automatically adjusts reactive power output to stabilize voltage, creating a closed-loop feedback control mechanism that maintains voltage stability without complex manual intervention
Solution Approach 2:
The air conditioner performs self-regulation of voltage by autonomously detecting voltage magnitude and adjusting its own reactive power supply. The system serves itself by automatically compensating for voltage deviations without requiring external control systems, thereby maintaining voltage stability while keeping the control structure relatively simple
2Reliability
If the supply section always supplies fundamental reactive power, then the voltage stability is improved, but the loss of energy increases due to unnecessary reactive power supply
Solution Approach 1:
The reactive power supply is made dynamic rather than static. The control section continuously adjusts the reactive power output based on real-time voltage magnitude measurements. When voltage is within the predetermined range, reactive power supply is reduced or stopped; when voltage deviation occurs, reactive power supply is increased accordingly. This dynamic adjustment eliminates unnecessary energy loss while maintaining voltage stability
Solution Approach 2:
The system changes the operating parameters of reactive power supply based on voltage conditions. By monitoring voltage magnitude and adjusting reactive power output parameters dynamically, the system optimizes energy efficiency - supplying reactive power only when voltage deviation occurs and adjusting the supply level to match the actual voltage stabilization needs, thereby reducing unnecessary energy loss
3Object-generated harmful factors
If the supply section suppresses harmonic, then the power quality is improved, but the device complexity increases due to additional control requirements
Solution Approach 1:
The supply section is designed to perform multiple functions: it supplies reactive power for voltage stabilization and simultaneously suppresses harmonics. By making the supply section multi-functional, the system achieves both voltage stability and harmonic suppression without adding separate dedicated devices, thereby improving power quality while minimizing the increase in device complexity
Solution Approach 2:
The reactive power supply function and harmonic suppression function are merged into a single integrated control mechanism. The control section simultaneously manages both reactive power output and harmonic current injection based on voltage magnitude measurements, combining multiple functions into one unified system that reduces overall complexity compared to having separate independent systems
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
The system effectively suppresses voltage deviations and harmonic generation by dynamically controlling the supply of reactive power, ensuring efficient power use and reducing the influence of harmonic flow.
Implementation Method 1
a supply section that supplies fundamental reactive power to a power receiving point of the input voltage in the air conditioner
Implementation Method 2
The supply section may suppress a harmonic generated from the air conditioner
Data Source
AI summary
[Object] To suppress the input of a voltage deviating from a predetermined magnitude range to an air conditioner, as compared to a configuration in which the air conditioner does not perform an operation according to the magnitude of the input voltage.[Solution] An air conditioner includes a voltage information acquisition section that acquires voltage information related to an input voltage input to the air conditioner, a supply section that supplies fundamental reactive power to a power receiving point of the input voltage in the air conditioner, and a control section that controls the supply section. The control section has a first supply mode for supplying the fundamental reactive power from the supply section to the power receiving point in accordance with a magnitude of the input voltage identified from the voltage information acquired by the voltage information acquisition section.