What is the IQF freezing method?
IQF refers to a freezing method that rapidly lowers the temperature of materials to below -18°C within a very short time, causing the internal moisture to quickly form extremely small ice crystals. Because of its fast freezing speed and low freezing temperature, this method effectively preserves the freshness and nutritional components of the materials. It is a commonly used method for preserving vegetables.
Why are many vegetables preserved by IQF?
Vegetables are highly perishable products, and IQF method can quickly lock in their nutrients, such as vitamin C and dietary fiber. Furthermore, flash-frozen vegetables typically have a shelf life of 12–24 months, significantly reducing losses caused by seasonal production fluctuations.
The main tool for IQF—freezing equipment
IQF equipment is the core tool for achieving rapid cooling and efficient continuous processing. Common types include:
- Fluidized bed freezing machine
This equipment is suitable for granular, flaky, and diced products, such as green peas, corn kernels, and diced carrots.
Features: Utilizes strong air circulation to suspend the product in cold air, achieving “fluidization.”
Freezing speed is fast, typically completed in 5–10 minutes.
- Spiral freezing machine
This machine is suitable for factories with high production volume and limited space.
Fitur:
The spiral conveyor belt enables continuous freezing of large volumes.
Small footprint, yet strong freezing capacity.
- Tunnel-type freezing machines
This machine is commonly used in large-scale food processing production lines and can be used for various foods such as fruits, vegetables, and meats.
Features: Linear structure, suitable for continuous batch freezing of single products; high cold air velocity, low temperature, and stable freezing effect.
Of course, in addition to the types of equipment mentioned above, there are other types of peralatan pembekuan available to suit different usage scenarios and material requirements. If you would like to learn more, please leave us a message.
