Impingement Freezer

Impingement is a process where high-speed air jets are directed along the top and bottom of the food. Impingement cold air streams remove the static surface layer around the product, resulting in very fast freezing, with small ice crystals and thus resulting in a high-quality product. Impingement freezing is used for products with a large surface area in relation to weight and is ideal, for e.g., for: hamburgers and other flat products. Impingement technology is also used in crust-freezing.

Spiral freezers:
Other freezing techniques: