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Thawing frozen prod. esp. food with HF or UHF radiation - while prod. surface is cooled with electrostatic cryogenic spray
Thawing frozen prod. esp. food with HF or UHF radiation - while prod. surface is cooled with electrostatic cryogenic spray
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机译:解冻冷冻的产品。尤其是带有HF或UHF辐射的食物-同时产生。用静电低温喷雾冷却表面
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摘要
Internal heat is generated in the prod. by exposure to HF or UHF radiation while the surface of the prod. is kept cool with an electrostatic spray of a cryogenic liq. e.g. liq. nitrogen or "F reon R 12" (RTM). The radiation frequency is pref. ca. 25-50 MHZ or a few thousand MHZ. The process is pref. applied to the prod. as it is conveyed through a thermally insulated tunnel. Thawing is fast without producing surface burns. Undue drying and infection of the prod. with bacteria are avoided.
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机译:产品中会产生内部热量。通过在产品表面暴露于HF或UHF辐射。用低温液体的静电喷雾保持冷却。例如液体氮或“氟利昂R 12”(RTM)。辐射频率是优选的。 ca. 25-50 MHZ或几千MHZ。该过程是优选的。应用于产品。当它通过隔热隧道输送时。解冻速度快,不会产生表面烧伤。产品过分干燥和感染。避免与细菌接触。
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