Freezing plant for food products

Claim 1

An arrangement in a freezing unit for food products having a preferably low bulk weight and/or long holding time as compared with, for example, peas, said plant comprising in combination: (a) a freezer having an infeed end, an outfeed end, and cooling elements between said infeed end and said outfeed end; (b) a precool unit having an infeed end and an outfeed end, said precool unit being coupled at the outfeed end thereof to said freezer at the infeed end of said freezer; (c) means for circulating air from said freezer to said precool unit and back to said freezer so that air returned to said freezer will be evenly spread over said cooling elements and whereby the amount of air in said freezing plant is maintained substantially constant without any reaction with ambient atmosphere wherein said air circulating means includes a first pipe connecting said freezer and said precool unit adjacent said outfeed end of said precool unit for cooling air to flow from said freezer to said precool unit and through said precool unit in a direction opposite to the feed direction of the product, and a second pipe connecting said precool unit to said freezer for air to return from said precool unit back to said freezer.