Freeze drying equipment
The freeze drying equipment is composed of refrigeration system, vacuum system, heating system, and an electrical instrument control system. The main components are drying chamber, vapor condenser, refrigeration unit, vacuum pump, heating and cooling device, etc. Freeze drying technology is the method of freezing the water in the products into a solid state, and then sublimating the water from the solid state to a gaseous state, so as to remove the water and preserve the products. Freeze drying equipment are becoming more and more popular and are widely used in medicine, biological products, food and other fields.
Compared with the conventional method, the freeze drying equipment has a lot of advantages. Many heat-sensitive substances will not be denatured or inactivated, including fruit, vegetable. When drying at low temperature, the loss of some volatile components in the substance is small. Therefore, some suppliers use industrial freeze drying equipment to freeze dry coffee. During the freeze drying process, the growth of microorganisms and the action of enzymes cannot proceed, so the original properties can be maintained. Because it is dried in a frozen state, the volume is almost unchanged, the original structure is maintained, and no concentration occurs. The dried material is loose, porous and sponge-like. After adding water, it dissolves quickly and completely, and restores its original properties almost immediately.
Since the freeze drying is carried out under vacuum, there is very little oxygen, so some easily oxidized substances are protected. Through freeze drying equipment, the large range of food can be removed more than 95% to 99% of moisture, so that the finished products for sale can be stored for a long time without deterioration.
In the field of food freeze drying equipment, freeze dried fruit has become the most concerned and most popular area for investment. The fruit has a short shelf life and is extremely perishable. Storage at low temperature does not last long, and it will also make the fruit lose its own taste and nutrients. Freeze dried food does not need to add any preservatives or additives, and can be stored for several years after processed by freeze drying equipment, and no nutrition is lost. Since the market demand for food is far greater than that of medicines and biological products, the food freeze drying market has huge potential.