Flowers、after fruits, vegetables, and other agricultural products are harvested，continue to generate substantial field heat。if products are in poorly ventilated packaging，prone to moisture loss、wilting，in severe cases, it may even cause fruits and vegetables to rot、poor appearance，affect product value and selling price。
Experiments show，flowers and vegetables treated with vacuum precooling，product surfaces remain dry、fresh and vibrant green，can greatly reduce spoilage rates，is widely recognized as an effective precooling method for preservation。
vacuum precooling can uniformly lower product temperatures inside and out in a short time，reduce post-harvest quality loss，help agricultural products maintain better freshness、appearance and product value。
Thorough Precooling，both the inside and outside of products can be cooled evenly，preservation performance is more pronounced。
Products do not require special stacking arrangements，simplify preparation before precooling and on-site operating procedures。
each cycle takes approximately 15～30 minutes，can complete a given processing volume，greatly shorten agricultural precooling time。
vacuum cooling is less restricted by product packaging methods，good precooling results can still be achieved after packaging。
because precooling time is greatly shortened，operating energy consumption is lower than water cooling or forced-air precooling。
