Views: 453 Author: Site Editor Publish Time: 2025-07-15 Origin: Site
Yingtai Food Freeze Dryer for Fruits and Vegetables
In the pursuit of health and convenience in modern life, freeze-dried fruits and vegetables can retain their original nutritional content, color, texture, and aroma while achieving long-term stable preservation. This is accomplished by freezing fresh produce at low temperatures and then removing moisture through sublimation in a high-vacuum environment. Under low-temperature and low-pressure conditions, solid ice is directly converted into gaseous water vapor, avoiding the damage that liquid water could cause to the cellular structure of fruits and vegetables.
The freeze-drying process for fruits and vegetables mainly consists of three steps: pre-treatment, freeze-drying, and post-treatment.
- Pre-treatment: Includes sorting, washing, cutting, and sterilization to ensure the freshness and hygiene standards of the raw materials.
- Freeze-drying: The pre-treated produce is rapidly frozen below its freezing point and then subjected to sublimation drying in a high-vacuum environment, allowing moisture to transition directly from a solid to a gaseous state.
- Post-treatment: Packaging and storage to ensure the quality and safety of the freeze-dried products.
The advantages of freeze-drying technology for fruits and vegetables are mainly reflected in the following aspects:
- Nutrient retention: Freeze-dried fruits and vegetables can preserve vitamins, minerals, dietary fiber, and other nutrients to the greatest extent.
- Convenient storage and portability: With low moisture content, freeze-dried products have a long shelf life, require no preservatives, and are easy to transport and store for extended periods.
- Excellent rehydration: Freeze-dried fruits and vegetables can quickly restore their original texture and flavor upon rehydration, making them suitable for ready-to-eat foods, instant beverages, baking ingredients, and more.
As people's lifestyles become faster-paced and health awareness increases, freeze-dried fruits and vegetables are gaining popularity. In the future, with continuous technological advancements and cost reductions, freeze-dried produce will find broader applications in functional foods, pharmaceutical health products, and other fields.
Fruit and vegetable freeze dryers typically consist of multiple systems, including refrigeration, vacuum, heating, and control systems, ensuring the process is carried out in a low-temperature, low-pressure environment. The PLC control system enables precise regulation of pre-freezing, sublimation drying, and desorption drying, ensuring consistent product quality.