介绍了一套实用型单级高频同轴脉冲制冷机工作在深低温区的性能特性。输入功率为200W时,冷头无负荷最低温度可达到29.35K,输入功率为235W时,冷头无负荷温度可稳定在28.55K。这是目前国内无多路旁通的单级高频脉冲管制冷机获得的最低温度,国际上位于先进行列。200W输入条件下,35.6K可提供0.5W制冷量,为30-40K温区相关的小冷量应用提供了一种简单有效的方法。
This paper introduces a single-stage high frequency coaxial pulse tube cryocooler(PTC) that could reach temperature below 30 K. With 200 W electrical input power and 46 Hz driving frequency, this PTC has achieved a no-load temperature of 29.4 K and provides a cooling power of 0.5 W at 35.6 K. By increasing the input power to 235 W, a no-load temperature of 28.6 K can be obtained.