Cold storage and freezing device

Abstract

The invention provides a cold storage and freezing device. The cold storage and freezing device comprises a refrigerator body, a controlled atmosphere film assembly, an air extraction device and a filtering and purifying device. Storage space is limited in the refrigerator body and internally provided with a storage container, and controlled atmosphere fresh keeping space is arranged in the storage container. The controlled atmosphere film assembly is arranged to make more oxygen in airflow in surrounding space of the controlled atmosphere film assembly enter an oxygen-rich gas collecting cavity through a controlled atmosphere film relative to nitrogen in the airflow in the surrounding space of the controlled atmosphere film assembly. The air extraction device communicates with the oxygen-rich gas collecting cavity of the controlled atmosphere film assembly so that gas penetrating in the oxygen-rich gas collecting cavity can be discharged out of the storage container. The filtering and purifying device is arranged to filter at least part of gas flowing into the surrounding space of the controlled atmosphere film assembly from the controlled atmosphere fresh keeping space. The cold storage and freezing device is good in fresh keeping effect, small in size, low in noise and low in cost, bacteria and other pollutants can be prevented from polluting the controlled atmosphere film assembly, and the service life of the controlled atmosphere film can be prolonged.

Description

technical field [0001] The invention relates to the technical field of refrigerator storage, in particular to a refrigeration and freezing device. Background technique [0002] A refrigerator is a refrigeration device that maintains a constant low temperature, and it is also a civilian product that keeps food or other items in a constant low temperature and cold state. 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 food remain unchanged as much as possible during the storage period. At present, in order to better store food in the market, there is only one kind of vacuum preservation. Vacuum fresh-keeping methods that are often used are vacuum bag fresh-keeping and vacuum storage compartment fresh-keeping. [0003] Using vacuum bags to keep fresh, consumers nee...

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Problems solved by technology

[0004] 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. More air, more energy consumption

Moreover, in a vacuum environment, it is difficult for food to receive cold, which is not conducive to food storage.

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.

[0005] In addition, the inventors found that: due to the large volume and high cost of nitrogen-making equipment traditionally used for controlled atmosphere preservation, this technology is basically still limited to use in various large-scale professional storage warehouses (storage capacity is generally at least 30 tons or more) )

It can be said that what kind of appropriate gas adjustment technology and corresponding devices can be used to economically miniaturize and quiet the air conditioning system, making it suitable for families or individual users, is a problem that technicians in the field of air conditioning and fresh-keeping have been eager to solve but have never been able to solve. Technical problems that can be successfully solved

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