Principle of Freeze Dryer
This vacuum freeze dryer technology can completely remove the water from the food, thus avoiding the loss of nutrients during ordinary drying processes. It also preserves the original shape, taste, and color of the food. Household freeze dryers typically have intelligent controls, as well as temperature and time settings, allowing users to select appropriate settings for different foods to achieve optimal freeze-drying results.
1.Freezing: The food is rapidly frozen under low temperature conditions, causing the water inside to form ice crystals.
2.Reduced pressure: The frozen food is placed in a vacuum chamber, and the surrounding pressure is reduced, causing the ice crystals to convert into water vapor at a lower temperature.
3.Water removal: The water vapor is drawn out by a vacuum pump, causing the water inside the food to change directly from a solid to a gas state, thus avoiding the loss of nutrients caused by water.
4.Solidification: After pressure reduction and water removal, the water inside the food has been completely removed, resulting in a dry state.
Freeze dryer can get rid of more than 95-99% moisture. Some easily oxidized materials can be prevented from oxidizing and can be preserved for a long time owing to the vacuum working condition.
Freeze dryer equipment is complicated and the process control requirements are relatively high, with a high energy consumption and long time for Freeze Dryer. As one of the types of necessary drying equipment, the Freeze Dryer equipment can be widely used in biological, chemical and pharmaceutical fields.
1.Food preservation: Freeze-drying technology can preserve fresh fruits, vegetables, meat, and other ingredients for a longer period of time while also retaining their original taste, aroma, and nutritional content.
2.Outdoor exploration: Household freeze dryers can help outdoor explorers freeze dry various foods, reducing weight and making them easy to carry, while also avoiding problems with food spoilage or decay in the outdoors.
3.Road trips: Household freeze dryers can provide convenience for road trips, allowing families to make various freeze-dried foods such as crispy fruit slices, nuts, and more that are easy to carry and eat.
4.Emergency preparation: In natural disasters or emergency situations, household freeze dryers can help families prepare food reserves for unexpected needs.
5.Baking: Household freeze dryers can be used to make dried fruits, berries, and other ingredients for baking cakes, cookies, and other baked goods.
6.Other applications: Household freeze dryers can also be used to make dried flowers, herbs, medicinal herbs, and other dried materials, as well as to protect and preserve collectibles.
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Recipes for Freeze Dryer Fruits
Freeze-Dried Strawberry Chips
- Fresh strawberries
- Lemon juice
- Sugar (optional)
Wash and slice the strawberries into thin, even pieces.
Dip each strawberry slice into lemon juice and arrange them on the freeze-dryer tray.
Sprinkle sugar over the strawberries if desired.
Freeze-dry the strawberries according to the manufacturer’s instructions until they are crispy.
Freeze-Dried Banana Slices
- Ripe bananas
- Lemon juice
Peel the bananas and slice them into even pieces.
Dip each banana slice into lemon juice and arrange them on the freeze-dryer tray.
Freeze-dry the banana slices according to the manufacturer’s instructions until they are crispy.
Freeze-Dried Pineapple Chunks
- Fresh pineapple
Peel and core the pineapple, and cut it into bite-sized chunks.
Toss the pineapple chunks with honey until they are coated.
Place the pineapple chunks on the freeze-dryer tray.
Freeze-dry the pineapple according to the manufacturer’s instructions until they are dry and slightly crunchy.
Freeze-Dried Apple Slices
- Fresh apples
- Sugar (optional)
- Wash and slice the apples into even pieces.
- Sprinkle cinnamon and sugar (if desired) over the apple slices and toss to coat.
- Arrange the apple slices on the freeze-dryer tray.
- Freeze-dry the apples according to the manufacturer’s instructions until they are crispy.
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