JP2017172824A - Cold insulation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a cooled object at a desired temperature as long as possible and carry the cooled object while cooling it at the desired temperature, when cooling the cooled object at the desired temperature using a frozen refrigerant and an unfrozen refrigerant.SOLUTION: An item 2 is housed in an inner box 10, an unfrozen refrigerant 31 is housed in a periphery of the item 2, the inner box 10 in which the item 2 and the unfrozen refrigerant 31 are housed is housed in an outer box 20, and a frozen refrigerant 32 is housed in a periphery of the inner box 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a cold-retaining method for keeping an object to be kept cold, and more particularly, to a cold-retaining method for keeping an object to be kept cold at a constant temperature using a frozen cryogen and an unfrozen cryogen.

  Conventionally, foods and the like are kept cold at a constant temperature using a cold-retaining agent. A generally used cryogen having a melting point of 0 ° C. or lower is used, for example, after being cooled in a freezer at a low temperature of about −25 ° C. and then taken out from the freezer. For this reason, if the cold-retaining agent is used in a state where it is taken out from the freezer, the object to be kept cold such as food is cooled to 0 ° C. or lower.

  Among the objects to be kept cold by using the cold-retaining agent as described above, there are some which are preferably not kept at a temperature of about 2 to 8 ° C. and not more than 0 ° C. Thus, when such a cold object is kept at a predetermined temperature, it is used after the cryogen is taken out from the freezer and then left at room temperature or in a refrigerator for a certain period of time. It is also conceivable to cool the object to be cooled through a heat insulating material or the like.

  However, it is not efficient to take out the cryogen from the freezer and leave it for a certain period of time. In addition, in the case where the object to be cooled is kept cold through a heat insulating material or the like, the cold air of the cryogen is only slowly transmitted to the object to be cooled, and the cold object is cooled too much. .

  Here, two types of cryogens having different melting points are used, one of the cryogens is placed around the object to be cooled in an unfrozen state, and the other cryogen is frozen and the outside of the unfrozen cryogen A technique for keeping the object to be cooled at a constant temperature by placing it in contact with the heat sink is disclosed in Patent Document 1.

International Publication No. 2012-015881

  As described above, when placing an unfrozen cryogen around the object to be cooled and placing the frozen cryogen in contact with the unfrozen cryogen on the outside, the frozen cryogen and unfrozen The presence of the cryogen in the same space greatly changes the temperature at which the object to be kept cool depends on the size and amount of the frozen and unfrozen cryogen. There is a risk that the temperature cannot be kept cool.

  In addition, when the unfrozen cryogen disposed around the object to be cooled and the frozen cryogen disposed outside thereof are in contact with each other, the unfrozen cryogen is frozen in a short time, Thereby, there exists a problem that a to-be-cooled material will be cooled too much.

  In addition, when a cold object is taken out of the cold storage container in order to take it out of the cold storage container and carry it, the cold object will be immediately exposed to the outside air. However, there is a problem that it is not preferable.

  The present invention has been made in view of the problems of the conventional techniques as described above, and in the case where an object to be cooled is kept at a desired temperature using a frozen cryogen and an unfrozen cryogen. Another object of the present invention is to provide a method for keeping cold to be kept at a desired temperature for as long a time as possible and to carry the object to be kept while being kept at a desired temperature.

In order to achieve the above object, the present invention provides:
A cold-retaining method for keeping an object to be cooled using a frozen cryogen and an unfrozen cryogen,
The cooled object;
The frozen cryogen;
The unfrozen cryogen;
A rectangular inner box that houses the object to be cooled and the unfrozen cryogen;
It is composed of a heat insulating material having a higher heat insulating effect than the inner box, and the inner box and a rectangular outer box containing the frozen cryogen,
The object to be cooled stored in the inner box is surrounded by the unfrozen cryogen stored in the inner box, and the object to be cooled and the unfrozen cryogen stored in the outer box are stored. The arranged inner box is surrounded by a frozen cryogen contained in the outer box.

  In the present invention configured as described above, an object to be cooled is accommodated in the inner box, and an unfrozen cryogen is accommodated around the object to be cooled. An inner box containing an unfrozen cryogen is contained, and a frozen cryogen is contained around the inner box, so that a space containing the unfrozen cryogen and a frozen cryogen Is a separate space, and the temperature balance in the two spaces makes it easier to keep the object to be cooled at a desired temperature for a long time. In addition, since the inner box is interposed between the unfrozen cryogen and the frozen cryogen, the unfrozen cryogen is not frozen in a short time, and the object to be cooled is cooled. Too much is avoided. In addition, the outer box is made of a heat insulating material that has a higher heat insulation effect than the inner box, so that the cold air from the frozen cryogen is efficient for the unfrozen cryogen while blocking heat from the outside of the outer box. Is transmitted. Furthermore, by removing the inner box containing the object to be cooled from the outer box, the object to be cooled can be taken out of the outer box and carried in the presence of a cooling agent around it. Even after taking out from the outer box, the object to be cooled can be carried while being kept at a desired temperature.

  Further, if the inner box is made of a heat insulating material, it takes longer to keep the object to be cooled at a desired temperature after taking out the object to be cooled from the outer box.

  According to the present invention, the space in which the unfrozen cryogen is accommodated and the space in which the frozen cryogen is accommodated are separate spaces, and the object to be cooled is kept for a long time due to the temperature balance in the two spaces. It becomes easy to keep at a desired temperature. In addition, since the inner box is interposed between the unfrozen cryogen and the frozen cryogen, the unfrozen cryogen is not frozen in a short time, and the object to be cooled is cooled too much. Can be avoided. In addition, the outer box is made of a heat insulating material that has a higher thermal insulation effect than the inner box, so that the heat from the outside of the outer box is blocked and the cold air from the frozen cryogen is efficiently used as an unfrozen cryogen. Can be transmitted. Furthermore, by removing the inner box containing the object to be cooled from the outer box, the object to be cooled can be taken out of the outer box and carried in the presence of a cooling agent around it. Even after taking out from the outer box, the object to be cooled can be carried while being kept at a desired temperature.

  Further, in the case where the inner box is made of a heat insulating material, it is possible to lengthen the time for keeping the object to be cooled at a desired temperature after taking out the object to be cooled from the outer box.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external appearance perspective view which shows one Embodiment of the cold storage container used for the cold storage method of this invention, (a) is a figure which shows the structure of the inner box and outer box which comprise a cold storage container, (b) is an inner box. It is the figure accommodated in the outer box. It is a figure for demonstrating the method of accommodating an inner box and the frozen cryogen in an outer box, when hold | maintaining articles | goods using the cold storage container shown in FIG. It is a figure for demonstrating the method of accommodating articles | goods and an unfrozen cryogen in the inner box accommodated in the outer box, when articles | goods are kept cold using the cold storage container shown in FIG. It is a figure which shows the state in which the articles | goods and the cold insulating agent were accommodated in the cold storage container shown in FIG. 1, (a) is the figure which looked in the outer box and the inner box from the side, (b) It is the figure which looked at the inside of an inner box from the cover surface side. It is a figure for demonstrating the effect when articles | goods are accommodated with the cold insulating agent in the cold insulating container shown in FIG. It is a figure which shows the state from which the articles | goods accommodated in the cold storage container shown in FIG. 1 are taken out from an outer box.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is an external perspective view showing an embodiment of a cold insulation container used in the cold insulation method of the present invention, (a) is a diagram showing the configuration of an inner box and an outer box constituting the cold insulation container, (b) Is a view in which the inner box is housed in the outer box.

  As shown in FIG. 1, the cold container in the present embodiment includes a rectangular inner box 10 and an outer box 20.

The inner box 10 includes a cover surface 11 made of a heat insulating material such as cardboard, side surfaces 12a to 12d, and a bottom surface, and the cover surface 11 is configured to be openable and closable by a hinge or the like. Here, examples of the heat insulating material include a foamed layer, a porous material, a fine void, and the like, a material having an air layer such as corrugated cardboard and a bubble cushioning material, and a vacuum heat insulating material. Further, as the heat insulating material, preferably heat transmission coefficient is not more than 30 w / m ² K, more preferably at most 15w / m ² K.

  The outer box 20 includes a cover surface 21, side surfaces 22a to 22d and a bottom surface made of a heat insulating material having a higher heat insulating effect than the inner box 10 such as polystyrene foam, and the cover surface 21 is configured to be freely opened and closed by a hinge or the like. In addition, the heat insulation effect should just be higher than the inner case 10 in at least one surface among the cover surface 21, the side surfaces 22a-22d, and the bottom face of the outer case 20.

  In the inner box 10 and the outer box 20 configured as described above, the inner box 10 is accommodated in a region surrounded by the side surfaces 22 a to 22 d and the bottom surface of the outer box 20.

  Below, the cold insulation method using the cold insulation container comprised as mentioned above is demonstrated.

  When the article to be cooled is to be kept cold using the cold container shown in FIG. 1, first, the inner box 10 and the frozen cryogen 32 are accommodated in the outer box 20.

  FIG. 2 is a view for explaining a method of accommodating the inner box 10 and the frozen cold-retaining agent 32 in the outer box 20 when the article is cooled using the cold container shown in FIG. It is the figure which looked at from the lid surface 21 side.

  When the article is kept cold using the cold insulation container shown in FIG. 1, first, as shown in FIG. 2 (a), the inner box 10 is put into the outer box 20 from the lid face 21 side with the lid face 21 open. Accommodate. Then, a space 25 is generated between the inner box 10 and the side surfaces 22a to 22d.

  Next, as shown in FIG.2 (b), the frozen cold insulating agent 32 is accommodated in the space 25 produced between the inner box 10 and side surface 22a-22d. Thereby, it will be in the state made into the arrangement | positioning which the cryogen 32 which frozen the circumference | surroundings of the inner box 10 surrounded. Further, the inner box 10 may be accommodated after the frozen coolant 32 is placed on the bottom surface of the outer box 20 in advance. In addition, as the cooling agent 32, the thing which has water as a main component and has melting | fusing point -3 degreeC-0 degreeC is used, and it is in the frozen state by being cooled below melting | fusing point. In addition, since the frozen cryogen 32 has free standing due to being frozen, it may be stored in the outer box 20 before the inner box 10 is stored in the outer box 20.

  Next, the article and the unfrozen cryogen are accommodated in the inner box 10 accommodated in the outer box 20.

  FIG. 3 is a diagram for explaining a method of storing the article 2 and the unfrozen cryogen 31 in the inner box 10 accommodated in the outer box 20 when the article is kept cold using the cold container shown in FIG. It is a figure and is the figure which looked at the inside of the inner box 10 from the cover surface 11 side.

  First, as shown in FIG. 3A, the article 2 is accommodated in the inner box 10 from the lid surface 11 side with the lid surface 11 open. Then, a space 15 is generated between the article 2 and the side surfaces 12a to 12d. The article 2 is pre-cooled to a desired temperature to be kept cold.

  Next, as shown in FIG.3 (b), the unfrozen cryogen 31 is accommodated in the space 15 produced between the articles | goods 2 and the side surfaces 12a-12d. Thereby, it will be in the state made into the arrangement | positioning which the circumference | surroundings of the articles | goods 2 surround the unfrozen cryogen 31. Further, when the article 2 is accommodated in the inner box 10, a space 15 is also generated between the article 2 and the lid surface 11 of the inner box 10, and thus the unfrozen cryogen 31 is also accommodated in this space 15. In addition, the article 2 may be accommodated on the bottom surface of the inner box 10 with the cold insulation agent 31 placed in advance. At this time, if the cold insulating agent 31 is accommodated between the article 2 and the side surfaces 12a to 12d and the lid surface 11 without a gap, when the inner box 10 is carried, the cold insulating agent 31 serves as a cushion and breaks the article 2. Etc. can be avoided. In addition, as the cooling agent 31, the thing which has water as a main component and melting | fusing point is -3 degreeC-0 degreeC may be used, and you may pre-cool to the temperature which wants to keep the goods 2 with the goods 2.

  After the article 2 and the unfrozen cryogen 31 are accommodated in the inner box 10 in this way, the lid surface 11 of the inner box 10 is closed and a space is also formed between the inner box 10 and the lid surface 21 of the outer box 20. 25 is generated, the frozen coolant 32 is accommodated in this space 25, and the lid surface 21 of the outer box 20 is closed.

  FIG. 4 is a view showing a state in which the article 2 and the refrigerants 31 and 32 are accommodated in the cold insulation container shown in FIG. 1, and (a) shows the inside of the outer box 20 and the inside of the inner box 10 from the side surface 22 a side. (B) is the figure which looked at the inside of the outer case 20 and the inside of the inner case 10 from the cover surface 21 side.

  As described above, the article 2 is accommodated in the inner box 10, the unfrozen cryogen 31 is accommodated around the article 2 in the inner box 10, and the article 2 and the unfrozen cryogen 31 are accommodated. When the inner box 10 is stored in the outer box 20 and the frozen refrigerant 32 is stored around the inner box 10 in the outer box 20, the article 2 and the frozen product are frozen as shown in FIG. The cryogen 32, the unfrozen cryogen 31, the inner box 10, and the outer box 20 are surrounded by the unfrozen cryogen 31 and the article 2 and the unfrozen cryogen 31 are accommodated. The inner box 10 is disposed so as to be surrounded by the frozen cooling agent 32.

  Below, the effect when the articles | goods 2 are accommodated as mentioned above in the cold storage container shown in FIG. 1 is demonstrated.

  FIG. 5 is a diagram for explaining the effect when the article 2 is accommodated in the cold insulation container shown in FIG. 1 together with the cold insulation agents 31 and 32. The inside of the outer box 20 and the inner box 10 are viewed from the side surface 22a side. FIG.

  As described above, when the article 2 is surrounded by the unfrozen cryogen 31 and the inner box 10 containing the article 2 and the unfrozen cryogen 31 is surrounded by the frozen cryogen 32, The unfrozen cryogen 31 is interposed between the article 2 and the frozen cryogen 32.

Then, as shown in FIG. 5, first, the heat energy J ₁ is exchanged between the frozen cryogen 32 and the unfrozen cryogen 31, so that the uncooled cryogen 31 is cooled by the cold air from the frozen cryogen 32. To be cooled. At that time, the side surfaces 12a to 12d or the lid surface 11 of the inner box 10 are interposed between the unfrozen cryogen 31 and the frozen cryogen 32, so that the unfrozen cryogen 31 can be kept in a short time. Will not freeze. Further, the outer box 20 is made of a heat insulating material having a higher heat insulating effect than the inner box 10, so that the cold air from the frozen cooling agent 32 is unfrozen while blocking heat from the outside of the outer box 20. The cooling agent 31 can be efficiently transmitted.

Then, the article 2 is cooled by the cold air of the unfrozen cryogen 31 by exchanging the thermal energy J ₂ between the unfrozen cryogen 31 and the article 2 cooled by the frozen cryogen 32.

  In this way, the article 2 is indirectly cooled by the frozen cooling agent 32 via the unfrozen cooling agent 31. Thereby, since the temperature of the article 2 does not become lower than the melting point of the unfrozen cryogen 31, the article 2 can be obtained by using the cryogen 31 having a melting point matched to a predetermined temperature for keeping the article 2 cold. Is kept at a desired temperature, and it can be avoided that the article 2 is cooled too much. At this time, the article 2 is accommodated in the inner box 10 and the unfrozen cryogen 31 is accommodated around the article 2, while the article 2 and the unfrozen cryogen 31 are accommodated in the outer box 20. Since the inner box 10 is accommodated and the frozen cryogen 32 is accommodated around the inner box 10, the space in which the unfrozen cryogen 31 is accommodated and the frozen cryogen 32 are accommodated. It becomes easy to keep the article 2 at a desired temperature for a long time due to the temperature balance in the two spaces.

  Next, the effect when the article 2 is taken out from the outer box 20 and carried will be described.

  FIG. 6 is a view showing a state in which the article 2 accommodated in the cold insulation container shown in FIG. 1 is taken out from the outer box 20.

  When taking out the article 2 accommodated in the cold storage container as described above, first, as shown in FIG. 6A, the lid surface 21 of the outer box 20 is opened and frozen on the lid surface 11 of the inner box 10. If the cold-retaining agent 32 is placed, it is removed.

  Then, as shown in FIG. 6B, the inner box 10 is taken out from the outer box 20.

  The article 2 taken out from the outer box 20 is carried in a state of being accommodated in the inner box 10 as shown in FIG. In the inner box 10, the article 2 is accommodated, and since the cryogen 31 cooled by the cold air of the frozen cryogen 32 is accommodated around the article 2, it is taken out from the outer box 20. After that, it can be carried while being kept cool at a desired temperature by the cool air of the coolant 31. In addition, the lid surface 11, the side surfaces 12a to 12d and the bottom surface 13 of the inner box 10 are made of a heat insulating material, so that after the article 2 is taken out from the outer box 20, the article 2 is kept at a desired temperature. The time to keep can be lengthened.

  In the present embodiment, the inner box 10 is accommodated in the outer box 20, the frozen coolant 32 is accommodated around the inner box 10, and then the article 2 is accommodated in the inner box 10. Although the unfrozen cryogen 31 is accommodated in the surroundings, the article 2 is accommodated in the inner box 10, and the unfrozen cryogen 31 is accommodated around the article 2, and then the article 2 is accommodated in the outer box 20. In addition, the inner box 10 in which the unfrozen cryogen 31 is accommodated, the frozen refrigerant 32 that is frozen around the inner box 10, or the inner box 10 in the outer box 20, In addition, the article 2 may be accommodated, an unfrozen cryogen 31 may be accommodated around the article 2, and the cryogen 32 frozen around the inner box 10 may be accommodated in the outer box 20. In this way, the article 2, the frozen cryogen 32, the unfrozen cryogen 31, the inner box 10, and the outer box 20 are surrounded by the unfrozen cryogen 31. The inner box 10 containing the article 2 and the unfrozen cryogen 31 is surrounded by the frozen cryogen 32.

2 goods 10 inner box 11, 21 lid surface 12a-12d, 22a-22d side surface 13, 23 bottom surface 15, 25 space 20 outer box 31, 32

Claims (2)

A cold-retaining method for keeping an object to be cooled using a frozen cryogen and an unfrozen cryogen,
The cooled object;
The frozen cryogen;
The unfrozen cryogen;
A rectangular inner box that houses the object to be cooled and the unfrozen cryogen;
It is composed of a heat insulating material having a higher heat insulating effect than the inner box, and the inner box and a rectangular outer box containing the frozen cryogen,
The object to be cooled stored in the inner box is surrounded by the unfrozen cryogen stored in the inner box, and the object to be cooled and the unfrozen cryogen stored in the outer box are stored. A cold insulation method in which the inner box is surrounded by a frozen cryogen contained in the outer box. The cold insulation method according to claim 1,
The inner box is a cold insulation method made of a heat insulating material.

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