目前,在冷库冷藏间中大多采用光滑冷却排管。在库温低于摄氏零度时,不可避免地在冷却排管表面会有霜层的积聚,为保证一定的传热效果,需采用定期热氨融霜或人工扫霜。究竟何时或霜层达到多厚时除霜最为适宜,至今尚没有理论上定性或定量的分 At present, most of the cold storage in the cold storage with cooling pipe. When the temperature of the refrigerator is lower than 0 degree Celsius, it is inevitable that there will be a layer of frost on the surface of the cooling pipe. In order to ensure a certain heat transfer effect, periodic heat ammonia defrosting or artificial sweeping should be adopted. It is most appropriate when defrosting is to take place or when the frost layer is thick, and so far no theoretically qualitative or quantitative points have been found