目的 为了提高食品冻结的品质，需要对冲击式速冻机的结构尺寸和内部流场进行优化，改善冲击式速冻机的冻结效率。方法 综述影响该类速冻机换热特性的4个因素，即喷嘴的形状和尺寸，射流阵列的排布，喷嘴到输送带距离和喷嘴间距的改变，速冻机进出口压差等。结果 通过回顾计算流体力学技术和实验研究在这4个方面优化速冻机换热特性的案例，总结了上下冲击式速冻机流场变化的规律。结论 该研究为新型速冻机的优化设计提供了理论支撑。

In order to improve the quality of food freezing, it is necessary to optimize the structural size and internal flow field of impact freezer to optimize its freezing efficiency. Four factors influencing the heat transfer characteristics of the freezer, namely nozzle shape and size, arrangement of jet impingement, variation of nozzle to conveyor belt distance and nozzle spacing, and freezer import and export pressure were reviewed. By reviewing the cases of of CFD technology and experimental research in these four aspects of heat transfer optimization of freezer, the law of heat transfer in this kind of freezer was summarized. This study provides a theoretical support for the optimal design of the new quick freezer.