Vacuum freeze-drying is a unique technique employed in the food industry to remove water from frozen food under vacuum conditions. In this specialized process, frozen water directly transitions from a solid state (ice) to vapor without passing through the liquid phase. This gentle method effectively preserves the food's original shape, color, texture, and nutritional content. Ultimately, vacuum freeze-drying helps ensure that the food retains its delicious taste and nutritional quality.

Walley offers a wide range of vacuum freeze dryers for foods with different specifications to cater to diverse customer needs, including both household and industrial applications. Additionally, our freeze dryers are available in two types: integrated and split structure.

Applications
  • Food preservation
  • Food processing
  • Food drying and preservation
  • Extended shelf life
    1. Home Freeze Dryer
    2. Home Freeze Dryer Home vacuum freeze dryer serves as one of the methods for preserving household food, enhancing the quality of modern living as a valuable kitchen tool. This model of lyophilizer features a small volume and low energy consumption, making it ideal for small-scale household use. It is used to freeze dry fruits, vegetables, beverages, meats, and seafood.
      Home Freeze Dryer
      Home Freeze Dryer
      Home Freeze Dryer
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    1. Integrated Freeze Dryer
    2. Integrated Freeze Dryer Integrated vacuum freeze dryer series features a compact design without the need for an external freezing tank, saving space. A freeze drying equipment includes a drying chamber, vacuum system, silicone oil system, refrigeration system, cold trap system, ice melting system, material transport system, automatic control system, and remote monitoring system.
      Commercial Freeze Dryer
      Commercial Freeze Dryer
      Commercial Freeze Dryer
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    1. Commercial Freeze Dryer
    2. Commercial Freeze Dryer This series of freeze dryer includes a pre-freezing system, drying tank, vacuum system, heating and cooling water or silicone oil system, refrigeration system, cold trap system, ice melting system, material transport system, automatic control system and remote monitoring system.
      Commercial Freeze Dryer
      Commercial Freeze Dryer
      Commercial Freeze Dryer
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FAQs

Freeze drying, also known as lyophilization, is the process of drying a product under low temperatures and vacuum conditions. Specifically, it involves freezing the pre-treated material rapidly at low temperatures, then heating the material in a frozen and vacuum state to allow the solid (ice) within the material to sublime into vapor. The vapor is then condensed back into solid state using a cold trap, effectively removing moisture and preserving the product.

For food processing companies, freeze drying helps maintain the natural color and nutrients of food for an extended period, enhancing the value of the products.
For food trading companies, freeze drying facilitates international trade of food products, leading to higher profitability. For consumers, freeze-drying food retains the original taste and texture, with no chemical changes or loss of nutrients. It also has good rehydration nature, making it convenient for consumption.
Additionally, freeze-drying food is easy to store for a long time, doesn't require preservatives due to its high dehydration level, and has an extended shelf life at room temperature.

A freeze-drying system generally consists of several components, including a pre-freezing system, drying tank, refrigeration system, vacuum system, heating and cooling system, control system, and auxiliary systems.