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Product details
Tuna/Salmon Refrigerator:
1. Freezing preservation method
This is a common and simple preservation method. In addition to using crushed ice, 3-7% NaCl, appropriate amounts of sorbitol, and compound food phosphates can be added during ice making. The fish can be washed and cut into 3-5cm thick fish slices, placed in a plastic film bag, and then placed in a plastic frame in the form of layered fish and ice in a 2-4 ℃ cold storage. For small tuna, they can also be covered with crushed ice without slicing. This method can generally extend the shelf life of tuna to 40 days.
2. Micro freezing preservation
3~5cm thick tuna fillets are subjected to micro freezing preservation at -1~-3 ℃, which can generally be preserved for 8~10 days without changing the color and flavor of the meat, and can be used as raw fish fillets.
3. Freezing method
Due to the fact that the oxidation rate of tuna myoglobin is 1-3 times faster than that of mammals, and the temperature effect is particularly significant, in order to maintain the color, taste, and texture of tuna meat during long-term storage, freezing storage is generally used. With the improvement of quality requirements and technological progress, the freezing temperature is also getting lower and lower, from -18 ℃ → -25 ℃ → -35 ℃ → -50 ℃ → -60 ℃. According to the research of Weiteng, during the 6-month freezing period, the production rate of high-speed iron myoglobin is about 33% lower at -35 ℃ than at -18 ℃, and only 2% higher than at -78V, while the energy consumption is much lower. Therefore, based on the current situation in China, it is recommended to... Freeze stored at -35 ℃. If we want to further extend the storage period, we need a lower freezing temperature. In addition, it must be noted that tuna frozen storage must quickly pass through the temperature range of -4 ℃ to -7 ℃, otherwise the muscles are also prone to discoloration. Low temperature tests that can be used to preserve biological materials, plasma, and special materials are suitable for blood stations, hospitals, epidemic prevention stations, electronic chemical laboratories, and offshore fishing companies.
Functional Features
1. Temperature control
2. Microcomputer control, temperature digital display, adjustable unit of 1 ℃, box temperature adjustable from -20 ℃ to -65 ℃;
3. At an ambient temperature of 25 ℃, the temperature inside the box can be adjusted to -86 ℃;
4. The temperature difference between the start and stop can be set.
refrigeration system
1. The unique blend of fluorine free refrigerants effectively reduces exhaust pressure, allowing the product to operate smoothly even in high temperature environments of 32 ℃;
2. Double layered door insulation design effectively maintains low temperature inside the box;
3. Ultra thick high-density fluorine free insulation layer with good insulation effect;
4. Special dual compressor cascade refrigeration system and heat exchange system design to ensure low temperature and high efficiency;
5. The product has undergone special system design and is operating normally.
Functional Features
1. Temperature control
2. Microcomputer control, temperature digital display, adjustable unit of 1 ℃, box temperature adjustable from -20 ℃ to -65 ℃;
3. At an ambient temperature of 25 ℃, the temperature inside the box can be adjusted to -86 ℃;
4. The temperature difference between the start and stop can be set.
refrigeration system
1. The unique blend of fluorine free refrigerants effectively reduces exhaust pressure, allowing the product to operate smoothly even in high temperature environments of 32 ℃;
2. Double layered door insulation design effectively maintains low temperature inside the box;
3. Ultra thick high-density fluorine free insulation layer with good insulation effect;
4. Special dual compressor cascade refrigeration system and heat exchange system design to ensure low temperature and high efficiency;
5. The product has undergone special system design and is operating normally.
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