Freeze dryers are not unfamiliar to everyone, they have already appeared and been used in our daily life. Nowadays, freeze dryers are widely known and used in many fields such as food processing, pharmaceuticals, biological products, and souvenir manufacturing.
1. What is a Freeze Dryer?
The freeze dryer originated in the 1820s, and after the continuous exploration and progress of drying technology, it has been favored more in the 21st century by virtue of the advantages of drying methods. It is not only applied in pharmaceutical, biological, food, and industrial fields, but its application fields are expanding with the continuous development of technology.
The principle of a vacuum dryer is to freeze the substance to be dried quickly at low temperatures and heat it up in a vacuum environment so that the ice sublimates directly into water vapor. This ensures the rapid removal of water from the substance, preserving to a large extent the original properties of the substance, while avoiding deformation or chemical reactions of the substance that may result from the use of traditional drying methods. On the other hand, in a vacuum environment, oxidation reactions and microbial contamination can be reduced, thus improving the purity and quality of the product. The faster speed of freeze drying can significantly reduce the preparation time and save energy costs.
2. Freeze Dried Food
Among the applications of freeze dryers, humans first froze potatoes in the Andes and dried them in the sun for easy storage and consumption. As the applications expanded, people gradually invented freeze-dried sugar, freeze-dried fruits, freeze-dried coffee, freeze-dried eggs, freeze-dried breast milk, etc.
2.1 Freeze Dryer Candy
They only need to be stored at room temperature for easy transport. Freeze-dried candies can also be placed in emergency kits or travel bags to provide a high-energy, long-lasting treat for people in special situations.
2.2 Freeze Dryer for Fruit
Vacuum freeze-dried fruits, referred to as freeze-dried fruits, retain the nutrients and color, and flavor of fruits to the maximum extent. Common freeze-dried fruits include strawberries, apples, bananas, blueberries, figs, etc. The test found that the vitamin C content of the freeze-dried strawberry cut-in-half treatment was the highest, followed by the slicing treatment, and the whole strawberry freeze-dried with lower vitamin C content. The freeze-drying area of 0.4 square meters, freezing temperature -40 degrees Celsius, less than or equal to 10pa in a vacuum environment, can achieve a better freezing effect.
2.3 Freeze Dryer Vegetables
Vacuum freeze-drying technology allows the nutrients of the vegetables themselves to be preserved, and the original flavor of the vegetables can be maintained after adding water to brew them again. Some common freeze-dried vegetables: mushrooms are rich in protein, vitamins, trace elements, and dietary fiber; spinach and other green vegetables are rich in minerals and trace elements such as potassium, calcium, magnesium, iron, zinc, and selenium; carrots are rich in carotene and are the main source of vitamin A; tomatoes are a good source of vitamin C; nori is rich in trace elements such as iron, zinc, selenium, and iodine; eggs are excellent proteins, each person daily You should eat 1 egg, which can meet your nutritional needs of eggs for a day.
3. Home Freeze Dryer
A home food freeze dryer is a common household appliance that can change food into a dry state by vacuum freeze drying to extend its shelf life, easy to use, and low cost.
Steps to using a home freeze dryer:
1. Wash and clean the food.
2. Slice or block.
3. Put the food on the material tray and put it into the freeze-drying chamber.
4. Set the freeze-drying process and set the intelligent control operation.
5. When the procedure is finished, take out the food and seal and pack it for long-term storage.
4. The Future of Freeze Dryer
Freeze dryers can help you achieve more value than you can try. Not only in the food industry but also in the pharmaceutical industry, where they are commonly used to prepare pharmaceuticals, plant extracts, and yeast; and in laboratories, where they can be used to prepare high-purity biological samples, serums, and enzymes. In addition, vacuum dryers are widely used to preserve and transport high-value pharmaceuticals.
Freeze dryers have strict requirements on vacuum level and temperature. The drying process requires the use of vacuum pumps and other specialized equipment. TOPTION has extensive experimental design and operating skills, and production and sales capabilities covering more than 70 countries around the world so that our customers' experiments can get excellent results. If you have a need for laboratory equipment, contact info@toptionlab.com for updates.
