Modified atmosphere freezer

Abstract

The invention discloses an air regulation fresh-keeping box which comprises a testing box body. The testing box body comprises more than two independent testing chambers, a circuit control module is arranged inside each independent testing chamber, and each circuit control module comprises a main control chip, a signal acquisition module, a humidity control module and a gas concentration control module. Each signal acquisition module sequentially transmits collected signals to the corresponding main control chip and the gas concentration control module through an A / D converter, and signals collected by a digital temperature and humidity sensor connected with each main control chip are transmitted to the corresponding temperature and humidity control module through the main control chip. According to the air regulation fresh-keeping box, more than two independent testing chambers are arranged, the humidity and the gas concentration of each independent testing chamber are set independently, a sterilization device and an ethylene removing device of each independent testing chamber are mounted and work independently, and thus experiment comparison is facilitated; the MCU main control chips are used in the circuit control modules for controlling all the circuits, the humidity, the gas concentration, the sterilization process and the ethylene removing process of each independent testing chamber can be controlled automatically, so that control is more accurate, and efficiency is higher.

Description

technical field [0001] The invention relates to the field of fresh-keeping devices, in particular to a modified-atmosphere fresh-keeping box more suitable for laboratory use and used for fresh-keeping and storage of agricultural products. Background technique [0002] With the development of modern science and technology and the improvement of people's quality of life, the preservation technology of agricultural products has become a major issue in scientific research and technology. The fresh-keeping methods of agricultural products (fruits and vegetables) have mainly gone through three stages of development: the first stage is to adopt direct natural fresh-keeping methods, such as using simple methods such as cellar storage and ventilated warehouses for fresh-keeping; the second stage is mechanical refrigeration fresh-keeping methods , such as using high-temperature cold storage, refrigerated containers, etc. for fresh-keeping; the third stage is the fresh-keeping method o...

AI Technical Summary

Problems solved by technology

[0005] Although the current modified atmosphere fresh-keeping equipment has the advantages of large fresh-keeping storage, easy handling and good fresh-keeping effect, it still has some shortcomings: for example, the existing modified atmosphere fresh-keeping boxes are all large-capacity and large-volume, and consume a lot of energy. It is not suitable for laboratory use; the modified atmosphere storage box used for testing does not have multiple independent test rooms, which is inconvenient for experimental comparison; the large-scale modified atmosphere storage box controls the gas ratio and the error of temperature and humidity is small

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