Moving type dry ice slow-release and pre-cooling litchi fresh-keeping device

Abstract

The invention relates to the technical field of controlled atmosphere cold storage fresh-keeping devices for fruits and vegetables, and specifically relates to a moving type dry ice slow-release and pre-cooling litchi fresh-keeping device. The fresh-keeping device includes a pre-cooling chamber for placing litchis or other fruits and vegetables and a dry ice slow-release refrigeration chamber forrefrigeration; a dry ice sublimation heat exchange system arranged in the dry ice slow-release refrigeration chamber includes an air inlet, a storage cavity, a dry ice sublimation heat exchange basketand an air outlet; the dry ice sublimation heat exchange basket is the place that dry ice can continuously perform sublimation and heat exchange; and the air inlet and the air outlet are respectivelyarranged in the walls of the storage cavity. Thus, field pre-cooling problems after the picking of the litchis can be effectively solved; and the fresh-keeping device has multiple advantages of cooling and sterilizing, and can avoid the litchis from being frostbitten and avoid unclean water from polluting the fruits, so that the fresh-keeping effects of the litchis can be realized to the greatestextent at the first link of litchi fresh-keeping cold chains.

Description

technical field [0001] The invention relates to a fruit and vegetable refrigeration and fresh-keeping device, in particular to a mobile dry ice slow-release precooling litchi fresh-keeping device, which belongs to the technical field of controlled-atmosphere refrigeration and fresh-keeping devices for fruits and vegetables. Background technique [0002] In order to improve food quality, safety and market value, the "cold chain" of food preservation has been valued by the domestic public. Litchi, as a famous and precious fruit in Lingnan, is widely loved by people at home and abroad. With the development of lychee fresh-keeping technology, the lychee industry has also developed rapidly with the continuous expansion of the market. In recent years, many areas in south of the Five Ridges (such as Maoming, Conghua, Zengcheng) have also become advantageous industrial parks for lychees. [0003] Currently, litchi preservation techniques are mainly divided into two categories: phys...

AI Technical Summary

Problems solved by technology

[0008] The current litchi pre-cooling technology is mainly divided into two categories, one is cold water or ice water pre-cooling. Although this technical measure can quickly eliminate the field heat of litchi, its defect is that too much water adheres to the skin surface after pre-cooling. , will cause subsequent problems such as browning, and the wet appearance is obviously not conducive to sales

The other type is air-cooling and pre-cooling. When air-cooling and pre-cooling lychees, the cooling temperature uniformity is poor, and the good fruit rate is not high.

[0009] With the development of e-commerce and the express delivery industry, in recent years, driven by government funding at all levels, many leading enterprises in the lychee industry have gradually established a "cold chain" for lychee preservation, although this "cold chain" is still relatively "rough". However, it still expands the sales market of fresh litchi to a certain extent, and greatly promotes the development of litchi industry.

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