Importance

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Abstract

An impinger for cooling or freezing products includes an impingement plate containing openings for directing impingement jets of a mixture of gas and solid or liquid cryogen toward the products transported on a conveyor, wherein the openings in aggregate have an open area of about 7% to about 12% of the total surface area of the impingement plate, the impingement plate providing a back pressure restriction of about 220 to about 475 Pa. A process for cooling or freezing products within a housing chamber includes transporting the products, particularly IQF food products, on a moving substrate within the chamber, mixing a gas with solid or liquid cryogen to form a mixture, directing the mixture to the aforementioned impinger; and selectively directing the pressurized impingement jets of the mixture from the impingement plate toward the products transported on the substrate.

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First Claim