Freezer

Abstract

The invention relates to a cold storage and refrigeration device. The cold storage and refrigeration device comprises a storage device, a nitrogen generation device, a gas feeding pipe and an on-off adjusting mechanism. An airtight storage space is limited in the storage device. The nitrogen generation device is used for providing nitrogen for the airtight storage space of the storage device. The gas feeding pipe connects the nitrogen generation device with the storage device so as to convey the nitrogen prepared by the nitrogen generation device into the airtight storage space of the storage device. The on-off adjusting mechanism is arranged on the pipe segment, near the nitrogen generation device, of the gas feeding pipe so as to communicate with and / or block the gas feeding pipe. In the gas flowing direction in the gas feeding pipe, the inner diameter of the partial pipe segment, located on the downstream part of the on-off adjusting mechanism and at least connected with the storage device directly, of the gas feeding pipe is smaller than that of the pipe segment, located on the upstream part of the on-off adjusting mechanism, of the gas feeding pipe. Therefore, the concentration of the nitrogen prepared by the cold storage and refrigeration device is high, the design scheme is simple, the structure stability is high, operation is convenient and fast, and the user satisfaction degree is high.

Description

technical field [0001] The invention relates to refrigeration and freezing technology, in particular to a refrigeration and freezing device. Background technique [0002] People's daily life is inseparable from various foods such as vegetables, fruits, fish, etc. These foods are usually stored by refrigerating and freezing devices such as refrigerators and freezers. However, for leafy vegetables and melons and fruits, since they are picked, they begin to undergo post-ripening process, causing the skins of the melons, fruits and vegetables to appear wrinkled and blotched. Although the low temperature environment in the refrigerating and freezing device can slow down the ripening of fruits and vegetables to a certain extent, the oxygen in the refrigerating and freezing device will still accelerate the deterioration of the food, resulting in an unsatisfactory quality preservation effect of the food in the refrigerating and freezing device. Therefore, the food stored in the ref...

AI Technical Summary

Problems solved by technology

However, the nitrogen concentration produced by the nitrogen generating device in the prior art is low, which cannot meet the requirements of high anti-oxidation function of the storage space, and the operation is cumbersome and the structure is complicated

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