摘要
在空气源热泵热水器系统中,冷凝温度时变性强,且过热度对电子膨胀阀的响应具有非线性、大时滞性的特点。针对这些特点,该文将模糊控制技术与蒸发器过热度原理相结合,设计了应用于电子膨胀阀调节的模糊控制模型,按照一定的控制策略实现对蒸发器过热度的控制。经过实验证明,该模糊控制方法具有一定的鲁棒性和适应性,能够较好地应用于非线性、时滞、时变的热泵系统的电子膨胀阀控制,可使热泵热水器系统具有较好的抗干扰性能和动态性能。
In the air-source heat pump water heater system,condensing temperature varies with the water temperature frequently,and the response with large time delay of superheat to electronic expansion valve （EEV） is nonlinear. Aim- ing at these characteristics ,this paper combined fuzzy control technology with evaporator superheat principle and built up a fuzzy control model applied to regulate the EEV,and realized superheat control according to certain control strategies. Through experiments,this control model can make the heat pump system has good dynamic performance.
出处
《自动化与仪表》
2016年第6期42-45,共4页
Automation & Instrumentation
关键词
模糊控制
热泵
电子膨胀阀
过热度
fuzzy control
heat pump
electronic expansion valve （EEV）
superheat
