温度场对冻藏环境下速冻白芦笋脱水的影响

模拟冻藏环境下稳定温度场和周期波动的非稳定温度场，在其中对未解冻、半解冻和严重解冻的速冻白芦笋分别进行脱水实验。理论分析和实验结果证实，温度场的存在是造成冻藏局部小环境水分浓度不平衡而引发速冻白芦笋脱水危害的根本原因。可以通过冻结物冷藏库设计的改进和操作管理的改进来防止速冻食品脱水的措施。

Effect of Temperature Field on Dehydrating Process of Quick Frozen White Asparagus in Frozen Food Storing Field

Steady temperature field and unsteady temperature field with periodic temperature variation were simulated separately in frozen storage fields. Experiments of dehydrating process for non- thawed, half- thawed, and highly- thawed frozen white asparagus were conducted respectively in the different temperature fields. Theoretical analysis and experimental results show that the existence of the temperature field is an ultimate cause of water thickness imbalance in the local mini - fields which results in dehydration of the quick frozen white asparagus. Some measures were proposed to prevent frozen food from dehydrating, such as improving the design of the cold storage and the operation management.