双联变频空调系统控制方法的仿真

Simulation on the Control Strategy of Double-Evaporator Air-Conditioning System with Inverter

双联变频空调系统中各蒸发器间相互影响以及各参数的强烈耦合 ,致使该系统的控制特性非常复杂 .为此 ,从双联变频空调系统的运行特性的研究结果出发 ,引进负荷系数并采用模糊推理方法来确定各房间的负荷 ,制定出该系统中双电子膨胀阀及变频压缩机的控制方法 .利用集总参数法 ,建立了包括房间对象和各部件的系统动态热力学模型 ,对系统的控制进行仿真 .仿真结果表明 ,该控制方法具有响应快、超调小。

The control characteristics of a double evaporator air conditioning system with inverter is very complicate due to the affection between the two evaporators and the strong coupling of system's parameters. According to the performance characteristics of double evaporator air conditioning system, the load factor and fuzzy reasoning method were adopted, one control strategy of this system was presented. A transient lump parameter themodynamic system model based upon components was established. Simulation on the control strategy of such a system was carried out. The simulation results show that the control strategy has high control qualities such as quick response, little overshoot and high control accuracy.