DISPLACEMENT CONTROL AND KINETIC ANALYSIS OF A NOVEL VARIABLE DISPLACEMENT COMPRESSOR FOR AUTOMOTIVE AIR CONDITIONER

A novel variable displacement compressor (VDC) for automotive air conditioner (AAC) is introduced, which inherits the advantages of common wobble plate type VDC. It has fewer parts and makes less noise, and instead of pneumatic valve the displacement is controlled by electronic control valve. In order to know the control mechanism well and get a good control effect, a mathematical model for the variable displacement mechanism is developed according to the geometrical and kinematical information of the compressor. Using the model, the effect of relevant parameters on variable displace control is estimated. It is helpful to make the optimum decision in the flow control of AAC. As the novel displacement control device, the structure and control rule of electronic control valve is introduced. It can get better effect than the conventional pneumatic valves. And by using this new electronic control device, the optimum systemic control of AAC is available.

汽车空调压缩机变排量控制阀的研究现状

结合相关课题 ,针对目前应用较广的斜盘式压缩机的变排量控制阀进行了研究 .在对现有的几种变排量压缩机控制阀的结构和控制方法进行分析后 ,认为 :与目前普遍使用的气动型控制阀相比 ,电动型控制阀作为一种新型的控制元件 ,可以自动调节压缩机排量 ,有助于汽车空调系统整体综合控制的实现 .因而 ,结合系统整体的运行特性 ,研制电动型变排量控制阀 ,制定最优的控制策略 。

采用电控型变排量压缩机的汽车空调制冷系统的容量控制研究

介绍了一种新型的以电动控制阀为执行器的变排量压缩机,并从压缩机的变排量机理、系统的稳定性、容量控制方案和控制算法等方面对汽车空调制冷系统变容量控制问题进行了理论和实验研究。指出作为一种新型容量调节元件,电动控制型变排量压缩机弥补了以往制冷系统出现的车室温度波动大、蒸发器易结霜和系统振荡的缺点,有极好的应用前景。