Nitrogen freshness preservation drawer

Abstract

The invention relates to the field of domestic refrigeration equipment, in particular to a nitrogen freshness preservation drawer used in the inside of a freezer. The nitrogen freshness preservation drawer comprises a drawer cavity, a drawer cover part, an air inlet, an air extraction opening and an air extractor, wherein the air inlet and the air extraction opening are formed in the drawer cavity. The air extraction end of the air extractor is connected with an air extraction opening pipeline, an air separating device is arranged on the drawer cavity, the air feeding end of the air separating device is connected with an air inlet pipeline, and the air inlet end of the air separating device is connected with an air outlet end pipeline of the air extractor. A pressure release part is arranged on the drawer cover part, and a locking component is arranged between the drawer cavity and the drawer cover part. According to the nitrogen freshness preservation drawer, the drawer cavity can be independently formed in the freezer, the original structure of the freezer is basically not affected, the structure is simple through a nitrogen separating mode, a pressure release mode and a locking mode, and using is convenient.

Description

technical field [0001] The invention relates to the field of household refrigeration equipment, in particular to a nitrogen fresh-keeping drawer used in a freezer. Background technique [0002] Nitrogen gas preservation belongs to the category of modified atmosphere preservation technology, which can delay the metabolism and post-cooking process of food to the greatest extent (including corresponding chemical reactions) ), so as to keep the food quality, color and taste basically unchanged, and achieve the effect of keeping fresh for a long time. Nitrogen fresh-keeping technology uses N2 as an inert gas, which generally does not chemically interact with food, to achieve the effect of extending the fresh-keeping period of food. [0003] The invention patent with the application number 200420047891.8 relates to an improved freezer fresh-keeping structure, which is installed with a gas separation membrane device in the freezer, the gas separation membrane device has a polymer ...

AI Technical Summary

Problems solved by technology

[0006] The above patents are all aimed at the nitrogen fresh-keeping function proposed for the entire freezer. For the overall freezer to realize the nitrogen fresh-keeping function, there are the following disadvantages: 1) The airtightness cannot be completely guaranteed, because the essence of nitrogen fresh-keeping technology is to increase the concentration of nitrogen components and reduce oxygen and carbon dioxide , ethylene and other component concentrations of modified atmosphere preservation technology, if the airtightness of the container cannot be guaranteed, the outside gas will continue to exchange with the gas inside the container

It is not enough to rely solely on the magnets of the freezer door seal (it can only be relatively airtight), and the freezer compartments will be equipped with drainage holes (for discharging defrosting water), and these pipes are connected to the external environment, so , cannot fundamentally guarantee the effect of nitrogen preservation; 2) The cost increases more, and larger gas separation devices, pumps and other devices need to be added; 3) The problem of internal and external pressure difference is not considered, because after the gas is separated or exchanged, it will cause The pressure inside the box is not equal to normal pressure, therefore, the problem of pressure balance needs to be considered when opening the door of the freezer; 4) It will have a great impact on the use of users, and the realization of nitrogen preservation needs to start the pump to pump air from the freezer, due to the large volume of the box Large, longer pumping time is required, so the energy consumption and noise of the freezer will increase

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