真空冷冻干燥技术在食品加工中的应用研究进展与展望

Research Progress and Prospect of Vacuum Freeze-Drying Technology in Food Processing

摘要: 真空冷冻干燥(Vacuum Freeze Drying, VFD)是以低温真空下冰晶直接升华为水蒸气的原理为基础实现物料脱水的先进加工技术，因而能极好地保留食品的营养成分、色泽、风味及组织结构，故被公认为食品干燥领域的“黄金标准”。VFD技术经过充分的科学研究和工程实践，已经发展成为食品、医药、生物科技诸领域中十分成熟、重要的核心加工手段。因此本文对VFD技术的原理及特点做了清晰、严谨的先期介绍，讨论其在果蔬、肉制品及水产品、乳制品、调味品、功能性食品加工中的典型应用，再从预处理节能技术、联合干燥工艺、智能化控制等角度系统梳理近年主要技术创新进展，客观分析当前高能耗、高成本、智能化水平有限诸种问题，提出其在连续化生产、精准营养、绿色低碳等领域的发展趋势。

Abstract: Vacuum Freeze Drying (VFD) is an advanced dehydration technique predicated upon the direct sublimation of ice crystals into water vapor under low-temperature vacuum conditions. Owing to its exceptional capacity to preserve the nutritional constituents, color, flavor, and textural integrity of food materials, VFD is widely acknowledged as the “gold standard” in the domain of food drying. Through rigorous scientific investigation and engineering refinement, VFD has evolved into a mature and indispensable core operation across the food, pharmaceutical, and biotechnology industries. Accordingly, this paper first provides a clear and methodical exposition of the fundamental principles and defining characteristics of VFD. It then proceeds to a substantive discussion of its representative applications in the processing of fruits and vegetables, meat and aquatic products, dairy items, seasonings, and functional foods. Subsequently, major technological advances in recent years are systematically reviewed from the perspectives of energy-efficient pretreatment strategies, hybrid drying methodologies, and intelligent process control. The prevailing challenges—including substantial energy consumption, elevated operational expenditure, and limited degrees of automation—are subjected to objective scrutiny. Finally, the paper delineates prospective developmental trajectories with respect to continuous production systems, precision nutrition paradigms, and green low-carbon initiatives.