Method is for freezing of product on continuous conveyor belt, with belt which runs in straight line in entry zone and spirally in spiral zone

摘要

The method is for freezing a product on a continuous conveyor belt (10). In an entry zone, the belt runs in a straight line, whilst it runs spirally in a spiral zone (11) in which final freezing of teh product occurs for subsequent packing or distribution. In a pre-freezing zone (40), the product is subjected to several jets, preferably of air. The conveyor belt has a product-supporting surface which permits passage to the cooling air medium. The pre-freezing zone incoroporates a pressurizing device which comprises the cooling medium. The cooling medium is pressurized in a chamber (41) provided with a number of holes so orientated that from the chamber they eject jets of air against the product. The pre-freezing zone has a cooling medium intake (44) for receipt of air held in the spiral freezer housing.