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How does a belt freezer freeze packaged meals?

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frozen meals — frozen meal Depositing of prepared meals in trays prior to freezing.

A belt freezer freezes packaged meals by placing food trays or boil-in-bags onto a conveyor belt that transports the product through a freezing zone.12

Inside this zone, which is typically an air-blast room, the system blows precooled air at approximately -40 °C over the food products. This rapid exposure to cold air ensures the food is frozen quickly to minimize quality changes and dehydration.12

Depending on the facility's needs, the belt configuration can vary:
* Simple wire-mesh belt: A basic arrangement that conveys the product into the freezing environment.1
* Multitiered belt: Uses several tiers of belts to save floor space.1
* Spiral belt: A compact design that maximizes surface area, often utilizing self-stacking tiers to efficiently channel airflow between the belts.1

By moving the product through these controlled environments, the belt freezer effectively removes heat from the surface of the food to achieve the required subfreezing temperatures.12