JPH0526448Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention relates to a coolant, and more specifically, to a coolant that is particularly suitably used in the low-temperature transportation of perishables.

PRIOR ART Conventionally, perishables such as fruits, vegetables, and seafood have been transported in a so-called low-temperature transport in which they are stored in an insulated container together with a cooling material in order to maintain freshness and prevent deterioration of quality.

Examples of the coolant used in the above-mentioned low-temperature transportation include dry ice, ice, and hydrogel.

<Problems to be solved by the invention> Of the above coolants, dry ice
Because it has a very strong cooling effect, if it is used for low-temperature transportation of perishables with a high cooling temperature range (e.g. -5 to +10℃), it may become supercooled and cause quality changes. , since it is cooling more than necessary, that amount of dry ice is wasted. In addition, when dry ice sublimes, it causes a sudden temperature change,
There was a risk that this would lead to quality changes.

Furthermore, although ice and hydrogel do not have the risk of causing the above-mentioned supercooling, they have the problem of not being able to maintain their cold retention effect over a long period of time.

On the other hand, in today's highly developed home delivery system, there is a strong demand for long-distance transportation, and there is a demand for a refrigerant that can maintain its cold retention effect for a long time.

<Purpose> This invention was made in view of the above-mentioned points, and the purpose is to provide a coolant that can maintain a cooling effect for a long time at a desired temperature without causing a change in quality.

<Means for solving the problem> The refrigerant of this invention to achieve the above object is a refrigerant made by combining an animal refrigerant and dry ice, in which the refrigerant is placed in a hollow container. At the same time, dry ice is stored in a recess surrounded by the refrigerant in the hollow container.

However, the hollow container may be composed of a container body and a lid that can be opened and closed with respect to the container body, and in this case, at least one of the container body and the lid has a dryer. It is sufficient if a recess for storing ice cream is provided.

Furthermore, the dry ice may be stored surrounded by a heat insulating material.

<Function> According to the refrigerant having the above structure, dry ice can be surrounded by the refrigerant and the cooling effect can be performed while suppressing supercooling caused by the dry ice. By combining the sustainability of the cooling effect due to the large latent heat of the cooling agent with the buffering effect and appropriate cooling ability of the cold storage agent, the cooling effect can be efficiently performed.

In particular, when the hollow container is composed of a container body and a lid that can be opened and closed with respect to the container body, dry ice can be easily stored by opening the lid.

Furthermore, if the dry ice is stored surrounded by a heat insulating material, the cooling effect of the dry ice can be further suppressed.

<Example> Hereinafter, an example will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the coolant of this invention. The above coolant is ice, water-containing gel, etc.
and dry ice 2, and the dry ice 2 is entirely surrounded by the above-mentioned refrigerant 1.

To explain in more detail, the cold storage agent 1 is sealed in the hollow part 31 of the hollow container 3 made of synthetic resin, and the dry ice 2 is sealed in the recess 3 of the hollow container 3.
It is stored in 2. The hollow container 3 is a combination of a container body 3a and a lid 3b each having a hollow structure, and the lid 3b is attached to the container body 3a via a hinge portion 33 so as to be openable and closable. A recess 32 for storing the dry ice 2 is provided in both the container body 3a and the lid 3b.
is formed. This recess 32 is the hollow container 3
It is preferable to form it so that it is located in the center of the area.

With the above configuration, the dry ice 2 is surrounded by the refrigerating agent 1, and the endothermic effect of the dry ice 2 can be suppressed by the refrigerating agent, so that fresh food etc. can be stored when in use. It is possible to prevent the product from being locally cooled or overcooled. That is, by combining the latent heat of the cold storage agent 1 and the latent heat of the dry ice 2, an appropriate cooling effect can be performed, and it is possible to prevent quality changes in the stored items. Moreover, with dry ice 2,
The cold preservation effect can be maintained for a long time, and dry ice can be used efficiently without wasting it. Further, it is also possible to prevent the ambient temperature from rising rapidly after the dry ice 2 sublimes. Furthermore, the dry ice 2 can be easily stored by opening the lid 3b.

Incidentally, openings with caps for refilling the refrigerant 1 are formed in predetermined portions of the container body 3a and the lid 3b as necessary.

Further, as shown in FIG. 2, the dry ice 2 may be stored in a state surrounded by a heat insulating material 5 such as a synthetic resin foam. In this case, the cooling effect of the dry ice 2 is reduced. This can be further suppressed by the heat insulating material 5, and the cooling effect of the dry ice 2 can also be adjusted by changing the thickness of the heat insulating material. Above insulation material 5
It is preferable to form it into a container shape as shown in the figure.

FIG. 3 is a sectional view showing another embodiment, in which a lid 3d made of synthetic resin foam is combined with a container body 3c having a hollow structure. The container body 3c has a deep recess 32.
is formed, and a flange 34 extending outward is formed at the edge of the opening. Then, in the hollow part 31 of the container body 3c, as in the above embodiment,
A cooling agent 1 made of hydrous gel or the like is sealed, and dry ice 2 is stored in the recess 32 .

The coolant having the above configuration is used by being inserted into the container 4 through the through window 41 formed on the upper surface of the container 4 for low-temperature transportation. At this time, the container body 3
The coolant can be easily fixed by hooking the flange 34 of c on the periphery of the through window 41. In addition, the lid body 3d made of foam allows the cooling agent 1 to
And the dry ice 2 can be thermally isolated from the outside air.

In this embodiment as well, as in the previous embodiment, stored items can be cooled while local cooling and supercooling are suppressed by the cooling agent 1, and the cold storage state can be maintained for a long time. .

Note that the coolant of this invention is not limited to the embodiment described above; for example, in the embodiment shown in FIG. Various design changes can be made without changing the gist of the invention, such as forming it on only one side, or storing the dry ice 2 surrounded by a heat insulating material in the embodiment shown in FIG.

<Effects of the invention> As described above, the refrigerant of this invention is a combination of an animal refrigerant and dry ice, and the dry ice allows the cooling effect to be maintained efficiently for a long time. The endothermic action of dry ice can be suppressed by a cooling agent to prevent supercooling from occurring. Moreover, rapid temperature rise after sublimation of dry ice can also be suppressed.

Therefore, it has the unique practical effect of being able to carry out long-term low-temperature transportation without causing quality changes.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing one embodiment of this invention, and FIGS. 2 and 3 are sectional views showing other embodiments. 1...Refrigerant, 2...Dry ice, 3...Hollow container, 3a, 3c...Container body, 3b, 3d...
... Lid body, 31 ... Hollow part, 32 ... Recess, 5 ...
Insulation.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A refrigerant consisting of a combination of an animal refrigerant and dry ice, in which the refrigerant is sealed in the hollow part of a hollow container, and the dry ice is sealed in the hollow part of the hollow container. A coolant characterized by being stored in a recess surrounded by the above-mentioned coolant. 2. The above-mentioned practical application, wherein the hollow container consists of a container body and a lid that can be opened and closed with respect to the container body, and at least one of the container body and the lid is provided with a recess for storing dry ice. A coolant according to claim 1 of the patent registration claim. 3. The coolant according to claim 1 of the above-mentioned utility model registration, wherein the dry ice is housed in a state surrounded by a heat insulating material.