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作为回热式低温制冷机关键部件之一,回热器性能对整机效率影响甚大。分析了回热器填料多孔介质的选择依据及性能评价指标。根据填料物性、结构及填充方式的不同,将其分为层叠丝网型、环形狭缝型、球状颗粒型、随机纤维型、平行丝束型和蜂窝泡沫型等。结合其结构形式,总结了不同回热器的特点及应用场合。对回热器填料研究和发展趋势进行了展望。
As one of the key components of the regenerative cryogenic refrigerator, the regenerator performance has a great impact on the overall efficiency. The selection basis and performance evaluation index of porous media for regenerator are analyzed. According to the packing material properties, structure and filling method is different, it is divided into laminated screen type, annular slit type, spherical particle type, random fiber type, parallel tow type and cellular foam type. Combined with its structure, summarizes the characteristics of different regenerators and applications. The research and development trend of regenerator packing are prospected.