Refrigerator and method of refrigeration

A cryopreservation and refrigerator technology, applied in food preservation, household refrigerators, coolers, etc., can solve problems such as health damage, high device cost, and human impact

Active Publication Date: 2010-01-27
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 met...

Method used

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  • Refrigerator and method of refrigeration
  • Refrigerator and method of refrigeration
  • Refrigerator and method of refrigeration

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Embodiment approach 1

[0053] First, supercooling will be described in detail. figure 1 It is a graph showing the temperature change when water freezes without supercooling (a) and with supercooling (b). The vertical axis of the graph is temperature, and the temperature is higher toward the top of the graph. The horizontal axis represents time, and the passage of time is shown along the direction of the arrow. The supercooled state refers to a state in which 100% of the substance does not freeze, regardless of the freezing point of the substance. Here, the so-called freezing point refers to the temperature at which the substance starts to freeze. That is, the so-called supercooled state refers to a state in which freezing is not complete although it is a temperature at which freezing should start. For example, the freezing point of water is 0°C. This freezing point varies depending on substances, and tends to be lower than 0° C. in foods with high salt concentration or high sugar content. If w...

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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...

Claims

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Application Information

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IPC IPC(8): F25D11/02A23L3/36F25D17/06F25D17/08
Inventor 半田真须美平冈利枝平敷勇八木田清松本真理子坂本克正前田刚小野香央里井坂久夫
Owner MITSUBISHI ELECTRIC CORP
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