Refrigerating and freezing device

Abstract

The invention provides a refrigerating and freezing device. The refrigerating and freezing device comprises a box, a plurality of first airtight assemblies, an air extracting pump and one or more second airtight assemblies, wherein a storage space is defined in the box; the first airtight assemblies are arranged in the storage space; a refreshment subspace is defined in each first airtight assembly; each first airtight assembly is provided with an oxygen-enrichment membrane assembly; the space around each oxygen-enrichment membrane assembly communicates with the corresponding refreshment subspace; an oxygen-enrichment gas collection cavity is formed in each oxygen-enrichment membrane assembly; the air inlet end of the air extracting pump communicates with the oxygen-enrichment gas collection cavities of the first airtight assemblies through air extracting pipes correspondingly; the air extracting pump is used for extracting gas in the oxygen-enrichment gas collection cavities out, so that the oxygen concentration of the refreshment subspaces is reduced; the second airtight assemblies are also arranged in the storage space; a live-keeping subspace is defined in each second airtight assembly; the live-keeping subspaces communicate with the air outlet end of the air extracting pump through exhaust pipes correspondingly so as to receive gas from the oxygen-enrichment gas collection cavities, so that an air atmosphere with the oxygen concentration higher than 70% in favor of keeping fresh food fresh is formed.

Description

technical field [0001] The invention relates to the technical field of storage, in particular to a refrigeration and freezing device. 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 that the color, taste, and freshness of the...

AI Technical Summary

Problems solved by technology

However, fresh aquatic products (such as live fish, live shrimp, live crab, etc.) cannot be stored alive in the prior art, and need to be cooked as soon as possible, which brings great inconvenience to users and affects consumers' enjoyment of fresh aquatic products.

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