Vacuum freeze-drying technology is a new technology to freeze water
containing materials at low temperature, and then to sublime ice
into steam and side by side under vacuum. It is a multidisciplinary
integrated application technology which is rapidly developed with
the development of refrigeration, vacuum, biology, electronics and
The application of vacuum freeze-drying technology is very
extensive. Almost all agricultural and sideline products, such as
meat, poultry, eggs, aquatic products, vegetables, fruits and so
on, can be made into freeze-dried foods, condiments, instant foods
and so on.
Vacuum freeze-drying technology is widely used in the food
industry, such as the following products. The process is usually
pretreated including, picking, peeling, cleaning and slicing, quick
freezing, freeze-drying, weighing and packing. Some freeze-dried
foods are used to make fast referenced powder.
The advantages of freeze-dried food:
1) at low temperature freeze drying, especially suitable for heat
sensitive food, so as not to denaturation or inactivation. Special
flavor foods have little loss of flavor substances and can preserve
the color and fragrance of food to the maximum extent.
2) freeze drying does not change the physical structure of the
food, and the chemical changes are very small. After drying, it is
porous and porous, and the volume is almost invariable.
3) quick rehydration, easy to eat. After drying, the porous
material is porous and spongy, and the water is dissolved quickly
and completely, almost immediately to restore the original shape.
4) the vacuum degree of the drying process is high, and the
oxidizing material is protected.
5) the weight of freeze-dried food is light and small, and it is
easy to store and transport. After packing all kinds of
freeze-dried vegetables, the volume reduced dozens of times, the
weight reduced more than ten times, and the storage and
transportation cost of packing was greatly reduced.
Shallot, garlic, onion, ginger, pepper, green peppers, carrots,
spinach, cauliflower, peas, asparagus, beans, broccoli, parsley,
edible fungus, etc..
Apple, peach, pear, apricot, red dates, strawberry, banana,
pineapple, melon, longan, durian, mangosteen, blueberry etc..
Beef, mutton, pork, chicken meat, etc..
4 aquatic products
Fish, shrimp, crab, squid, cuttlefish, silk, whitebait, sea
cucumbers, scallops etc..
5 convenience food
Instant noodles and its accessories, Rice-meat dumplings, soup,
baby food, food, food and other military aerospace.
6 instant drinks
Coffee, milk, soya bean milk, juice, royal jelly and so on.
Jam, soup, seasoning, spices etc..