Refrigerating and freezing device and preservation control method thereof

Abstract

The invention provides a preservation control method of a refrigerating and freezing device. The refrigerating and freezing device comprises a box body, an air-adjusted film assembly, an air sucking pump and oxygen concentration sensors, wherein a storage space is defined by the box body. The storage space is internally provided with sealed preservation subspaces. The oxygen concentration sensors are arranged in the preservation subspaces. The air sucking pump is configured to make air of the preservation subspaces of the storage space permeate through the air-adjusted film assembly. Air atmospheres facilitating food preservation are formed in the preservation subspaces of the storage space. The preservation control method comprises the steps of detecting varieties of food placed in the preservation subspaces; determining corresponding preservation operation conditions according to the varieties of the food, specifically, the preservation operation conditions at least comprise the oxygen concentration ranges corresponding to the variety information of the food; and obtaining the oxygen concentrations, measured by the oxygen concentration sensors, of the preservation subspaces and correspondingly controlling the air sucking pump, so that the oxygen concentrations of the preservation subspaces are kept in the oxygen concentration ranges, and accordingly the storage requirements of different types of food are met.

Description

technical field [0001] The invention relates to the technical field of storage, in particular to a refrigeration and freezing device and a fresh-keeping control method thereof. Background technique [0002] Food is the source of energy for people's survival and is very important to people. For food storage, the two main aspects are heat preservation and freshness preservation. Generally speaking, temperature has a significant impact on the microbial activity on food and the action of enzymes in food. The decrease in temperature will delay the deterioration of food, and the refrigerator is to keep it constant. A low-temperature refrigeration device is also a civilian product that keeps food or other items in a constant low temperature and cold state. [0003] With the improvement of the quality of life, consumers have higher and higher requirements for the preservation of stored food, especially for the color and taste of food. Therefore, the stored food should also ensure ...

AI Technical Summary

Problems solved by technology

The vacuum storage room is used to keep fresh. Since the box body is a rigid structure, it must be kept in a vacuum state. The requirements for the vacuum system and the sealing performance of the refrigerator are very high. There is a lot of air, which consumes a lot of energy for the refrigerator

[0006] On the other hand, in the vacuum environment in the refrigerator, it is difficult for the food to receive the cold, which is not conducive to the cooling of the food.

In addition, due to the vacuum environment, the user needs to spend a lot of effort to open the refrigerator door every time, which causes inconvenience to the user.

Although some refrigerators can ventilate the vacuum storage room through the vacuum system, this will cause the user to wait for a long time, and the timeliness is poor

A longer vacuum time will also cause serious deformation of the refrigerator box, that is, the existing refrigerators with a vacuum pumping structure cannot complete vacuum preservation well, and the strength of the box is required to be very high. The realization requirements are high and the cost is high.

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