首次提出了一种称为低温阀切换式脉冲管制冷机的新型制冷装置。它可适用于气体液化分离等需要较大制冷功率的应用场合。在该装置中，用普通热交换器取代了回热器，切换阀置于脉冲管冷端。对带低温切换阀的小孔气库型脉冲管的等熵膨胀效率的初步实验结果表明，其等熵效率可达４０％以上，显示了一定的应用前景。 For the first time, a new type of refrigeration device called a low temperature valve switched pulse tube refrigerator was proposed. It can be applied to gas liquefaction separation and other applications that require greater cooling power. In this device, the regenerator is replaced by a common heat exchanger, which is placed at the cold end of the pulse tube. The preliminary experimental results on the isentropic expansion efficiency of a small-bore gas-filled pulse tube with a low-temperature switch valve show that its isentropic efficiency can reach more than 40%, indicating a certain application prospect.