Refrigerator and method of refrigeration

Abstract

Supercooling refrigeration being a method of enhancing the quality of food frozen other than the quick freezing method is realized by simple construction, and there are provided a refrigerator and method of refrigeration capable of realizing high-quality freezing by simple construction. The refrigerator is one capable of food storage utilizing cold air generated by cooler (3), comprising supercooling case (81) adapted to hold stored food in a supercooling state such that freezing does not occur even at its freezing point or lower temperature for at least a given period of time. The supercooling case (81) consists of, for example, the downside case of up-and-down two stage case disposed in switching chamber (200) capable of switching to multiple temperature zones.

Description

technical field [0001] The present invention relates to a cryopreservation technique using supercooling, and relates to a refrigerator (also referred to as a freezer) and a cryopreservation method using the technique. Background technique [0002] It is well known that the quality of frozen food deteriorates when thawing compared to unfrozen fresh food. In the case of normal freezing, if food at normal temperature is placed in a space set at -18° C., the temperature of the food is cooled to the same temperature as the space over a certain period of time. After that, freezing is performed if the temperature is below the freezing point of the food. When this food is stored in a low temperature environment, it is gradually cooled from the surface until the center reaches the ambient temperature. At this time, because the temperature of the surface drops first, the surface starts to freeze first, and the ice crystals formed on the surface of the food expand while releasing the...

AI Technical Summary

Problems solved by technology

With this method, a supercooled state can be formed at a faster cooling rate than the prior art, but troubles for sealing food

In addition, there is a problem that it is difficult to seal all foods that can be stored in a freezer

[0018] In addition, the object located in the static magnetic field is continuously or intermittently irradiated with electromagnetic waves of a specified frequency determined according to the magnetic field strength of the static magnetic field, so that nuclear magnetic resonance occurs with the hydrogen nuclei constituting the water molecules contained in the object, and the moisture is formed. As the ice temperature drops, the freezing temperature becomes lower than usual, and this method results in a supercooled state, which results in the need for a complex and large-scale device, which weakens the practicability for food

For example, even for business use, the scale of the refrigerated warehouse is too large, the equipment cost is too high, and it is considered difficult to put it into practical use when it is considered that it is installed in a household refrigerator.

Furthermore, in recent years, health damage caused by electromagnetic waves has also attracted attention, and there is a problem that sufficient attention must be paid to the impact on the human body when applying to devices that can be easily opened and closed, such as refrigerators for household use, business use, and distribution.

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