Why do we need to pre cool vegetables?

　　After harvesting, the temperature inside vegetables remains high, which can lead to water loss and a decrease in quality. Therefore, in order to maintain the freshness and quality of vegetables, they need to be pre cooled. The purpose of pre cooling treatment is to extend the shelf life of vegetables by reducing their temperature and minimizing the loss of internal moisture. There are many methods for pre cooling treatment, including cold water pre cooling, vacuum pre cooling, cold air pre cooling, etc. Among them, vacuum pre cooling is a relatively effective pre cooling method because it can lower the temperature of vegetables to an appropriate level in a short period of time.

　　We will briefly introduce why vegetables need to be pre cooled here. In summary, pre cooling vegetables is very important. It can effectively reduce the internal temperature of vegetables, reduce the loss of water and nutrients, and thus maintain the freshness and quality of vegetables.

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