What is food refrigeration methods

in our life, the method of frozen fresh food has a lot of kinds, freezers in refrigerated preservation is one of the most common. Because of air-conditioner itself is refrigerated, frozen, fresh food or items, so widely used. Combined with living examples, we need to use air-conditioner fresh frozen food, most of fruits and vegetables. Because these products is necessary in our daily life, so if there are no freezers, how should we proceed with emergency treatment? First to understand various fruits and vegetables is probably need to be refrigerated preservation temperature range, the general temperature of preservation of fruits and vegetables in 5 ~ 8 ℃ ( Some buyers in the choice of air-conditioner choice must be 0 ℃, when in fact this is not science, not the lower the temperature, the better) , but banana, papaya, sugar apple, sweet potato and other warm is more than 10 ℃ ( At room temperature) 。 In general processing method for fruits and vegetables are: cold water, cold saline treatment method, the resurrection, heat treatment, direct refrigeration method, normal temperature preservation method of preservation of 6 kinds of common method. Here will give you the right these methods, one by one to carry on the simple introduction. Cold water treatment method: & other; Breathing quantity & throughout; Bigger corn, soybean, lettuce and other products in the fresh. Cold water treatment method is to water tank filled with water, 200 l) , fruit and vegetable soak, make the fruit and vegetable 7 ~ 8 ℃ temperature drop, cold water after processing, to absorb water with a towel or in the commercial freezer. The second is cold saline treatment: leaf vegetables in the processing, the processing steps are as follows: on the precooling groove processing, water quantity of 200 litres, water temperature 8 ℃, will wash fruits and vegetables precooling and, for 5 minutes. In cold salt water tank, water temperature 0 ℃, salt concentration 1%, 5 minutes. In the cold water tank, water temperature 0 ℃, remove all absorption of salt. In the space larger dry container and sent to the commercial freezer. Salt water tanks in fruits and vegetables in cold processing time not too long, to prevent the damage caused by salt. The third is the resurrection processing method: onion, cabbage and leaf vegetables treated with this method, such as, can make the fruit and vegetable duly replenish moisture, resurrected. This method is to fruits and vegetables in the average temperature of 200 litres of water in the sink, wash the sludge, and absorb the moisture. And then into space larger containers, make its resurrection. Mustard, floret front-end sprinkling water on the water, making the roots to absorb moisture, raised the effect is much better. Direct refrigeration method 4: general fruit, side dishes, food processing, such as in the processing. This commodity has been treated by manufacturers, mostly in sales before, just packaging or labeling can be sent to the stores sales. These goods can be directly into the high temperature in the refrigerator. Heat treatment 5: papaya, mango, banana, pineapple, cantaloupe and other fruit in the processing. Such goods in closed cartons, after a long time of transportation, the temperature will rise sharply, at this time as soon as possible to cool processing, namely open carton, fully gives heat dissipation, to room temperature. 6 normal temperature preservation method: pumpkin, potato, taro, burdock and other commodities in the processing. This commodity is not frozen, as long as in normal temperature, well ventilated place. The six kind of method is in the living examples, the research, we can also according to their actual situation, using the different methods for experiments, so that can be used in the future.
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