Throttling refrigerator and throttling refrigeration detector capable of achieving rapid refrigeration

The invention belongs to the technical field of infrared detection, and particularly relates to a throttling refrigerator and a throttling refrigeration infrared detector capable of achieving rapid refrigeration. A two-stage refrigeration mode of the precooling-stage refrigerator and the refrigeration-stage refrigerator is adopted, and gas throttled by the refrigeration-stage refrigerator is communicated with the external atmospheric environment, so that the pressure difference before and after throttling is increased, the throttling refrigeration effect is enhanced, the cooling rate of the detector is increased, and the imaging time of the detector is shortened. 本发明属于红外探测技术领域，具体为一种节流制冷器及可实现快速制冷的节流制冷红外探测器。通过采用预冷级制冷器和制冷级制冷器的双级制冷方式，并将制冷级制冷器节流后的气体与外界大气环境相连通，从而增大了节流前后的压力差，增强了节流制冷的效果，提高了对探测器的冷却速率，减少了探测器的成像时间。