Blast freezers use a combination of cold air and high-speed fans to rapidly bring down the temperature of foodstuffs, freezing them in just a few hours. This rapid cooling of blast chillers prevents large ice crystals from forming, maintaining the fresh quality and natural flavor of the food.
Tunnel Blast Freezers
These commercial blast chillers freeze the product from bottom to top, as it moves on a conveyer belt through the tunnel. The airflow is controlled so that cold air blows gently over the product and freezes it as fast as possible, in a very uniform way. These blast freezers are ideal for ice cream and other soft-serve desserts.
Spiral Blast Freezers
These commercial blast freezers use a collapsible belt of cold air to produce a spiral vortex in which products are transported in an orbit around their center of gravity. The placement of the product in a spiral allows for fast product freezing as well as for horizontal loading and unloading at continuous speeds.
What is the difference between a freezer and a blast freezer?
The main difference between a freezer and a blast chiller is that a freezer keeps the air at zero degrees Celsius or below, while an air blast freezer can get as cold as -40 degrees Celsius.
How fast does a blast freezer freeze?
Shock freezers can freeze food in as little as two to three hours, compared to the more standard six to twelve hours it may take for a normal freezer to freeze food.
What temp is blast freezing?
The temperature can vary from -10°C to -120 °C, depending on the product being frozen and its desired shelf life.
How much does a blast chiller cost?
The price of a blast chiller depends on the size, capacity, and features. A mini blast chiller can cost around $1,000, while an industrial blast freezer with a capacity of 2,000 kg/h can cost up to $23,000.