Application of nanotechnology in refrigeration equipment is one of the innovative researches in the field of refrigeration. Updated research achievements of nanotechnology in refrigeration field is reviewed,through summarizing the advantages of nanomaterials applied in refrigeration system under the background of energy conservation and environmental protection,introducing common preparation methods in recent years,enumerating the influence of different nano-refrigerants upon heat transfer, and explaining the effect of nano-particle in reducing friction and improving the performance of compressors. Several important questions have been raised:how to prepare long-term stable nano-refrigerant,how to build models of characteristics about flow boiling heat transfer and pressure drop of nano-refrigerant,as well as how to make sure that nano-particle will be stable in each part of the refrigeration system during running process. Researches should be focused on these problems in the future.%纳米技术在制冷设备中的应用是目前制冷领域的创新性研究之一.本文综述了纳米技术在制冷领域的最新研究成果,在节能环保的背景下总结了纳米材料应用于制冷系统中的优势,简单介绍了近几年常用的制备方法,列举了不同的纳米制冷剂对换热效果的影响,阐述了纳米颗粒在减小压缩机摩擦、提高压缩机性能方面的作用.提出如何制备具有长期稳定性的纳米制冷剂、建立纳米制冷剂流动沸腾换热和压降特性模型、确保纳米粒子可以在制冷系统各部件中运行稳定无沉淀是未来纳米技术在制冷领域研究的关键问题.
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