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果蔬保鮮冷庫貯藏保鮮各類蔬菜水果，限度內(nèi)極大延長(zhǎng)果蔬的保鮮期，實(shí)現(xiàn)較低的流轉(zhuǎn)腐損率和提升商品的經(jīng)濟(jì)價(jià)值。那為什么果蔬入保鮮冷庫貯藏保鮮前要預(yù)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?
果蔬預(yù)冷是指將果蔬在運(yùn)輸或貯藏之前進(jìn)行適當(dāng)降溫處理的一種措施，是搞好貯運(yùn)保鮮工作的第一步，也是至關(guān)重要的一步。預(yù)冷不及時(shí)或預(yù)冷不徹底，都會(huì)增加果蔬的采后損失。果蔬預(yù)冷的目的是為了實(shí)現(xiàn)散盡果蔬采后自身帶有的大量田間熱和呼吸熱。這是因?yàn)楣卟墒諑в刑镩g熱的同時(shí)又因自身呼吸旺盛產(chǎn)生大量的呼吸熱會(huì)使果蔬產(chǎn)品溫度升高，如不及時(shí)冷卻，這較高的溫度會(huì)加速果實(shí)成熟和衰老，影響貯運(yùn)，嚴(yán)重時(shí)還會(huì)造成腐爛。
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.
如果果蔬入保鮮冷庫貯藏保鮮前不預(yù)冷，那會(huì)如何影響果蔬在保鮮冷庫的保鮮期呢？試驗(yàn)證明，如果蘋果采后晚入庫預(yù)冷1天，將會(huì)縮短貯運(yùn)期10~30天；巴梨采收2天預(yù)冷可貯藏保鮮120天，但采后4天預(yù)冷只能貯藏保鮮60天。所以，不預(yù)冷造成的較短保鮮期嚴(yán)重影響了豐收果蔬的貨架期，嚴(yán)重影響經(jīng)濟(jì)收益。另外，未經(jīng)預(yù)冷的果蔬直接入保鮮冷庫進(jìn)行貯藏保鮮，則會(huì)加大制冷機(jī)的熱負(fù)荷量，影響制冷機(jī)的使用壽命，若里面已有產(chǎn)品貯藏，則也會(huì)影響庫內(nèi)產(chǎn)品的保鮮。試驗(yàn)證明，當(dāng)果蔬溫度為室溫20℃裝車或入庫時(shí)，所需排除的熱量為0℃的40~50倍，將極大地增加制冷機(jī)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，為最大限度地保持果蔬的新鮮品質(zhì)和延長(zhǎng)貨架壽命，預(yù)冷一定要做，且在采收越快處理越好，最好在產(chǎn)地進(jìn)行，即我們常說的源頭冷庫、田頭冷庫等。機(jī)械冷庫條件不允許的情況，也一定要放在陰涼通風(fēng)區(qū)域或地窖中散熱。
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.