2017-01-17 16:26:59

果蔬保鲜冷库贮藏保鲜各类蔬菜水果，限度内极大延长果蔬的保鲜期，实现较低的流转腐损率和提升商品的经济价值。那为什么果蔬入保鲜冷库贮藏保鲜前要预冷呢？
Preservation of fruits and vegetables cold storage and storage of fruits and vegetables, within the limit to greatly extend the freshness of fruits and vegetables, to achieve a lower rate of flow loss and enhance the economic value of goods. So why do fruits and vegetables into the cold storage cold storage before it?
果蔬预冷是指将果蔬在运输或贮藏之前进行适当降温处理的一种措施，是搞好贮运保鲜工作的第一步，也是至关重要的一步。预冷不及时或预冷不彻底，都会增加果蔬的采后损失。果蔬预冷的目的是为了实现散尽果蔬采后自身带有的大量田间热和呼吸热。这是因为果蔬采收带有田间热的同时又因自身呼吸旺盛产生大量的呼吸热会使果蔬产品温度升高，如不及时冷却，这较高的温度会加速果实成熟和衰老，影响贮运，严重时还会造成腐烂。
The pre cooling of fruits and vegetables refers to a fruit and vegetable processing measures appropriate cooling before transport or storage, the first step is to improve the storage and preservation work, one of the most important steps. Pre cooling is not timely or not thorough, will increase the Postharvest loss of fruits and vegetables. The purpose of the pre cooling of fruits and vegetables is to achieve a large amount of field heat and heat of respiration cleared of postharvest fruits and vegetables with its own. This is because the fruits and vegetables harvest with field heat and strong breathing breathing because of their great heat will make the temperature of fruit and vegetable products, such as not timely cooling, the high temperature will accelerate the ripening and senescence, effect of storage, can also cause serious decay.
如果果蔬入保鲜冷库贮藏保鲜前不预冷，那会如何影响果蔬在保鲜冷库的保鲜期呢？试验证明，如果苹果采后晚入库预冷1天，将会缩短贮运期10~30天；巴梨采收2天预冷可贮藏保鲜120天，但采后4天预冷只能贮藏保鲜60天。所以，不预冷造成的较短保鲜期严重影响了丰收果蔬的货架期，严重影响经济收益。另外，未经预冷的果蔬直接入保鲜冷库进行贮藏保鲜，则会加大制冷机的热负荷量，影响制冷机的使用寿命，若里面已有产品贮藏，则也会影响库内产品的保鲜。试验证明，当果蔬温度为室温20℃装车或入库时，所需排除的热量为0℃的40~50倍，将极大地增加制冷机的工作符合。
If the fruits and vegetables into the cold storage cold storage before the cold, how will it affect the preservation of fruits and vegetables in the preservation of cold storage period? The test proved that if Apple postharvest storage precooling late 1 days, will shorten the storage period of 10~30 days; Pakistan pear harvest 2 days pre cold storage can be 120 days, but 4 days after the pre cold storage only 60 days. Therefore, the relatively short shelf life caused by not pre cooling seriously affected the shelf life of fruits and vegetables, seriously affecting the economic benefits. In addition, without pre cooling of fruits and vegetables directly into the storage room for storage, will increase the heat load of refrigerator, refrigeration machine life, if there is already product storage, it will also affect the preservation of Library products. The test proves that when the fruit and vegetable temperature is loaded or stored at room temperature at 20 DEG C, the required heat quantity is 40~50 times of the temperature of 0 DEG C, which can greatly increase the working performance of the refrigerator.
因此，为最大限度地保持果蔬的新鲜品质和延长货架寿命，预冷一定要做，且在采收越快处理越好，最好在产地进行，即我们常说的源头冷库、田头冷库等。机械冷库条件不允许的情况，也一定要放在阴凉通风区域或地窖中散热。
Therefore, to maximize the quality of fresh fruits and vegetables to maintain and extend the shelf life of pre cooling must be done, and in harvest more fast, better, best in the fields, we often say that the source of cold storage, cold storage and other fields. Mechanical cold storage conditions are not allowed, but also must be placed in a cool ventilated area or cellar heat.

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