Method for Ice-free preservation with combination of air cooling and direct cooling

Abstract

The invention discloses a method for ice-free preservation with combination of air cooling and direct cooling. The method comprises the following steps: (1) starting an air-cooling unit to refrigerate; (2) automatically shutting down the air-cooling unit when the refrigerating work temperature of the air-cooled unit achieves -35 DEG C; (3) starting a direct-cooling sheet evaporator to begin the refrigerating work by a direct-cooling unit; (4) automatically shutting down the direct-cooling unit when the refrigerating work temperature of the direct-cooling sheet evaporator achieves -35 DEG C; and (5) restarting the direct-cooling unit and automatically switching into a control system when the preservation temperature of a refrigerating chamber rises to -1 DEG C from -35 DEG C, and carrying out infinite loop temperature different refrigerating control of -1 DEG C from -35 DEG C. The method is simple to use, effective temperature difference circulating refrigeration is carried out on a reserved material by adopting the preservation temperature from -1 DEG C from -35 DEG C, the original nutrients and moisture are kept, and non-leakage of moisture and nutrients and non-change of condition are achieved. Thus, the preservation temperature requirements and targets of marine products and meat products are achieved.

Description

technical field [0001] The invention relates to an ice-free fresh-keeping method combining air cooling and direct cooling. Background technique [0002] At present, in the domestic market, most of the preservation of seafood, meat products and other fresh-keeping is usually carried out by traditional air-cooling technology. The traditional air-cooled refrigeration technology system has the following characteristics: [0003] (1) Fast cooling speed [0004] Under normal circumstances, the cooling time only takes about 60 minutes to reach -35 [0005] (2) Loss of nutrients, moisture and protein in refrigerated products [0006] The traditional air-cooled refrigeration system uses air-cooled unit equipment to implement refrigeration, so the air blown out is dry and cold air, which has certain damage and influence on the moisture retention, protein and nutrition of the refrigerated items, resulting in the loss of nutrients, moisture and protein in the refrigerated items. ,...

AI Technical Summary

Problems solved by technology

[0006] Because the traditional air-cooled refrigeration system uses air-cooled unit equipment for refrigeration, the air blown out is dry and cold, which will cause certain damage and impact on the moisture retention, protein and nutrition of the refrigerated items, resulting in the loss of nutrients, water, and protein of the refrigerated items. , resulting in stale refrigerated items, white objects, no blood color, no taste, and products with no added value

[0007] (3) The refrigeration temperature is fixed and single

[0010] The traditional air-cooled refrigeration system has a short preservation time. Generally, the preservation time of refrigerated items is short, no more than 7 days at most

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