Flash-freezing cold storage refers to the method of rapidly freezing food by passing it through its ice crystal formation zone when the average temperature reaches -18℃. Various changes occur during the freezing process of food, such as physical changes (volume, thermal conductivity, specific heat, moisture loss, etc.), chemical changes (protein denaturation, color change, etc.), cellular tissue changes, and biological and microbiological changes. The characteristic of quickly frozen food is that it retains the original nutritional value, color, aroma, and taste to a great extent. In other words, it is necessary to ensure that the various changes that occur during the freezing process are reversible.
Quick-freezing food offers the following advantages:
Avoid the formation of large ice crystals between cells
(2) Minimize intracellular water exudation, resulting in less juice loss during thawing
(3) The contact time between concentrated solutes within cellular tissues, food tissues, colloids, and various components is significantly reduced, diminishing the harmful effects of concentration to a low degree.
(4) Rapidly lowering food temperatures below the level of microbial growth activity effectively resists microbial proliferation and their biochemical reactions.
(5) Food stays in the freezing equipment for a shorter duration, which is beneficial for improving equipment utilization and continuous production.
Most foods begin to freeze when the temperature drops to -1°C, with most ice crystals forming between -1°C and -5°C, a phase known as the high ice crystal formation stage. Rapid freezing can significantly shorten the freezing time at this stage, quickly expelling this heat, which is crucial for improving the quality of quick-frozen foods.
Technologically advanced:
The Xueyang series cold storage utilizes frost-free rapid freezing refrigeration technology, equipped with brand-name compressors and refrigeration accessories. It features automatic defrosting and microcomputer intelligent control for operation. The refrigeration system employs green refrigerants, positioning it as an advanced international refrigeration technology of the 21st century.
