Vacuum pre cooling fresh flowers:

Post harvest flowers should be timely rapid cooling treatment, more pre cooling preservation method of foreign flowers, early recovery of vacuum cooling fresh-keeping technology. Vacuum pre cooling fresh is the basis of vacuum conditions can accelerate the characteristics of water evaporation, the flower is placed in the vacuum box vacuum treatment, water flowers in the outward boiling, the latent heat of water vapor release in vitro with flowers, so that rapid cooling. Vacuum pre cooling is not only fast, uniform cooling, but also because of reduced pressure, the oxygen concentration decreased flower tissue, concentration of ethylene release is also reduced, which can effectively keep the freshness and prolong the storage period.

1, the vacuum pre cooling preservation is mainly by the humidity control pre cooling process to control the temperature, vacuum degree. Physiological characteristics, the required degree of vacuum and pre cooling box flowers flowers, flowers itself humidity sensitivity and the performance of the vacuum equipment.

Problems and Countermeasures of the 2, the vacuum pre cooling of fresh flowers. Flowers vacuum precooling preserving process will cause the water loss about flowers, the temperature is 10 ℃ lower water loss per 1%, such as the temperature from 30 ℃ to 5 ℃, about 3% water content. If serious surface flowers loss level, stomatal opening, will lead to decreased quality of fresh flowers. So we must strictly control the flowers appropriate humidity.

3, water refers to water the flowers flowers after a period of time together with the container in the vacuum box vacuum pre cooling in the pre cooling before, this method is mainly applied to the pre cooling end temperature requirements lower flowers (such as 1 ℃ to 2 ℃). In addition, more flower buds for post harvest flowers, adding about 1% silver nitrate in the container as a preservative. Water treatment because the vessel takes vacuum box space, thus affecting the production efficiency. Water treatment is a uniformly spray humidification of flowers use humidifier before pre cooling, pre cooling the flowers before the use of humidifier flowers to evenly spray humidification, the flowers before pre cooling has enough moisture. Practice has proved, convenient and suitable water treatment.

Vacuum cooler with cooling time (generally only 20 to 30 minutes), high efficiency, uniform cooling, not influenced by the packing and other significant characteristics, especially suitable for flowers, vegetables, fruit, edible fungus, the surface area and volume large articles vacuum pre cooling.