Fabric Air Ducts are Used for Fresh Storage

Leaf vegetables breathe vigorously after picking, water evaporates quickly, water loss rate reaches 5%, it loses its commodity value, and it is very vulnerable to mechanical damage. The quality of leaf vegetables is mainly affected by internal and external factors, the appearance quality is mainly affected by chlorophyll, and the internal quality is mainly affected by ascorbic acid, carotenoid and phenolic substances. At present, low temperature storage is one of the more effective methods for keeping leaf vegetables fresh. Studies have shown that compared with 20℃, the quality of lettuce can be significantly preserved at 0℃, and the decrease of soluble protein and sugar content, the decrease of polyphenol oxidase and peroxidase activities and the accumulation of free amino acids can be significantly inhibited at 0℃. The study on spinach and celery showed that the decomposition rate of chlorophyll and Vc at 4℃ was slower than that at 9℃. At the same time, under the condition of 4℃, the accumulation of nitrite can be effectively inhibited. It can be seen that constant temperature and uniform airflow are two important indicators for evaluating vegetable cold storage.

Bag Air Duct with refrigeration equipment can ensure the uniform distribution of cold capacity in the warehouse, improve heat transfer efficiency, reduce the dry consumption of vegetables, improve the storage quality of vegetables at the same time to achieve the purpose of energy saving. Cold air is transported to the work area at a speed of 0.07-0.18 m/s through permeable air distribution pipes. In the space where a large amount of cold air is needed, when the ground cooling load is as high as 300W/m2, the fabric Air Duct can achieve air supply without obvious sense of wind, and as a surface air supply mode, the air supply is uniform, which can ensure a very high temperature uniformity, create a low temperature storage environment for vegetables, and extend the shelf life of vegetables.