You can basically see fresh oranges in the market all year round, thanks to the orange fresh-keeping cold storage. Now the use of fresh-keeping cold storage to store oranges has become one of the common practices in my country. Orange fresh-keeping warehouses are built not only in fruit producing areas, but also in large foreign trade export bases. Next, Kuhua briefly talks about how to use orange fresh-keeping cold storage to store oranges.
Let’s talk about the principle of orange fresh-keeping cold storage first. Orange fresh-keeping cold storage uses insulation boards with excellent heat insulation and heat preservation functions as protection, and has refrigeration system equipment to supply cold energy, so that the temperature required for orange fresh-keeping can be maintained in the warehouse, and then the purpose of orange fresh-keeping is achieved. The refrigeration system of the orange fresh-keeping cold storage is the key to the entire cold storage. The refrigeration system is to use liquid refrigerant (liquid ammonia or freon, etc.) to absorb the heat in the cold storage when it is vaporized, and then achieve the purpose of lowering the temperature in the storage. Because the temperature in the warehouse is lowered, the respiration intensity of the oranges in the warehouse can be reduced, the reproduction of microorganisms on the surface of the oranges and in the body can be printed, the occurrence of decay conditions can be reduced, and the storage time of the oranges can be extended. Now, the refrigeration system is dominated by freezers. There are many types of freezers, and some use direct cooling and blowing cooling. In the storage of oranges, most of them use the blowing cooling method.
Let’s talk about the temperature of the oranges stored in the orange fresh-keeping refrigerator. The temperature of storing oranges is generally maintained at 3~12 ℃. When the temperature is lower than 3 ℃, it is easy to cause physiological diseases such as edema or dry scars of oranges; if the temperature is higher than 12 ℃, it is easy to cause oranges to rot. During the storage period, the temperature in the warehouse must be controlled. Once it is found that the temperature changes too much, it must be adjusted in time.
If the operation is done properly, the storage time of oranges can reach 3 to 4 months, and basically it can last for about 90-120 days. It should be noted that the oranges must be pre-cooled before entering the cold storage, and the quality of the oranges will be affected when the appropriate temperature is in storage. In addition, the temperature of the cold storage must be properly raised before the oranges are released from the cold storage, and the relative humidity of the oranges must be added to make the surface of the oranges brighter, so that they can be better sold in the market.
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