Controlled-atmosphere fruit and vegetable transportation and preservation method utilizing dry ice

Abstract

The invention discloses a controlled-atmosphere fruit and vegetable transportation and preservation method utilizing dry ice. The method comprises the steps that harvested fruits and vegetables are organized and sorted and then are put in controlled-atmosphere preservation bags; the dry ice is put into dry ice layers of the controlled-atmosphere preservation bags, and the bags are rapidly sealed and then are put into conventional foam box for transportation. The controlled-atmosphere preservation bags are divided into fruit and vegetable placement layers and dry ice placement layers, the two layers are connected in a heat seal mode to make the fruits and vegetables not in contact with the dry ice, and fruit and vegetable and dry ice placement vent holes are left in the connecting parts and used for air exchange of two layers. The method can prolong the fruit and vegetable preservation time by reducing the fruit and vegetable temperature and inhibiting fruit and vegetable respiration, meanwhile mechanical fruit and vegetable damages caused by jolting in the transportation process are decreased, the fruit and vegetable quality is improved, and the market demand is met.

Description

technical field [0001] The invention relates to the technical field of storage and transportation of fruits and vegetables, in particular to a fresh-keeping method for fruits and vegetables under controlled atmosphere transportation using dry ice. Background technique [0002] The main reasons for the quality deterioration of fruits and vegetables are: respiration, evapotranspiration, microbial action, and mechanical damage. Harvested fruits and vegetables are a living body, cells are still active, and respiration still plays an important role, which promotes the consumption of nutrients of fruits and vegetables, absorbs O2 and releases gases such as CO2, and generates heat and moisture at the same time, causing fruits and vegetables to rot and deteriorate. [0003] Low temperature can reduce the physiological activities of fruits and vegetables, inhibit the activity of enzymes, inhibit the growth and reproduction of microorganisms, reduce water evaporation, and reduce weigh...

AI Technical Summary

Problems solved by technology

Mechanical controlled atmosphere cold storage is the most advanced cold storage for fruit and vegetable fresh-keeping. It is based on cold storage and fresh-keeping, adding gas composition adjustment equipment, through the control of temperature, humidity, carbon dioxide, oxygen concentration and ethylene concentration in the storage environment , inhibit the respiration of fruits and vegetables, delay their metabolic process, better maintain the freshness and commerciality of fruits and vegetables, and prolong the storage period and sales shelf life of fruits and vegetables. Usually, controlled atmosphere storage can extend the storage period by 2-3 times than ordinary refrigeration, but controlled atmosphere Cold storage has disadvantages: air-conditioning storage is suitable for large enterprises, high investment, high cost, high maintenance cost, and the application area is not popular

The mechanical damage caused by transportation vibration seriously affects the appearance of fruits and vegetables, and leads to water loss and tissue decay of fruits and vegetables during storage, which in turn affects the quality of fruits and vegetables

[0006] At present, fresh fruit and vegetable packaging in transportation, especially e-commerce logistics, generally adopts external foam boxes and ice packs inside the box for freshness preservation. There is no modified atmosphere preservation technology for both cooling and buffering during fruit and vegetable transportation.

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