Definition of freeze dryer and dehydrator
1.Freeze dryer is the abbreviation of vacuum freeze dryer. Freeze-drying is a drying technique using the principle of sublimation. This is a new type of vacuum freeze dryer equipment integrating heat, vacuum, refrigeration, pressure vessel manufacturing and automatic control technology.
2.The dehydrator uses the hot air circulation function to obtain dry products. The moisture in the material is removed by hot air circulation. Under the action of heat, the moisture in the product changes from liquid to vapor and volatilizes (the principle of volatilization).
Freeze dryer vs dehydrator
The freeze dryer is to use the method of freezing and vacuuming.The frozen water molecules are sublimated into water vapor.(the principle of sublimation).
The dehydrator uses the hot air circulation function to obtain dry products.The moisture in the product changes from liquid to vapor and volatilizes (the principle of volatilization).
2.Nutrition, Flavor Shape and Taste
The freeze-drying process can be regarded as the principle of physical sublimation. Therefore, after freeze-drying, the original nutrients, color, flavor, and other biological properties of the product can be well preserved.
The dehydrator uses hot air circulation to remove the moisture from the ingredients. Under high temperature, the product may shrink and deform, the color may be dull, and the nutrients may be lost a little.
Advantages and disadvantages of freeze dryer and dehydrator
1.The products processed by vacuum freeze dryer machine have the characteristics of long shelf life and excellent color, aroma, taste and nutrition. In addition, it is conducive to long-term storage.
However, the operation process of the freeze-dried product processing technology is complicated, and the production cost is relatively high.
2.The dehydrator has a simple processing method, low cost and more energy saving.In addition, the equipment does not pollute dry product and the environment during use
However,Under high temperature, the physical properties of the product will change.Therefore, the product may shrink and deform, the color may be dull, and the nutrients may be lost a little.
How to choose a freeze dryer or dehydrator?
If you have high requirements for freeze-drying effect and want to preserve the nutrition, color and taste of materials well, freeze-drying machine is a good choice.If you want to get dry products in a low cost, energy efficient, simple way, a dehydrator is more suitable for your choice.