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为了解超长线列焦平面器件与斯特林制冷机耦合过程中的冷量传输损失,针对冷量传输过程中的辐射损失、导热损失以及耦合损失,采用自主研发的大冷量斯特林制冷机冷量传输平台,对杜瓦的镀层、冷链的层数、支撑柱的数量以及传输过程中包裹单面镀铝涤纶薄膜减少辐射损失等方面进行试验研究。试验结果表明,冷量传输过程中杜瓦的表面积引起的辐射损失大于镀层辐射损失;而采用包裹方式进行的防辐射处理大大减少传输过程中的冷量损失,支撑柱结构在不变的情况下导热损失保持恒定;同时由6层0.1 mm厚的紫铜箔构成的冷链在冷量传输和减振方面具有良好优势。斯特林制冷机冷量传输损失的研究有利于提高制冷机的制冷效率。
In order to understand the loss of heat transfer during the coupling process between ultra-long linear focal plane devices and Stirling chiller, aiming at the radiation loss, heat loss and coupling loss in the process of cold transfer, a self-developed large-capacity Stirling refrigeration Machine cooling transmission platform, the Dewar coating, cold chain layers, the number of support columns and the transmission process of single-sided coated aluminized polyester film to reduce radiation losses and other aspects of the study. The experimental results show that the radiation loss caused by the surface area of Dewar during cold transfer is greater than the radiation loss of the coating, while the radiation protection by the wrapping method greatly reduces the cooling loss during the transfer process. When the structure of the support column is invariable The heat loss is kept constant; at the same time, the cold chain consisting of 6 layers of 0.1 mm thick copper foil has a good advantage in terms of cold transfer and vibration damping. The research on the loss of cooling capacity of Stirling refrigerators is helpful to improve the refrigerating efficiency of refrigerators.