WO2019009358A1

WO2019009358A1 - Cooling tool

Info

Publication number: WO2019009358A1
Application number: PCT/JP2018/025510
Authority: WO
Inventors: 輝心黄; 邦広岡田; 夕香内海; 雅子西橋; 勝一香村; 知子加瀬; 哲本並; 大祐篠崎; 恭平勢造; 克也城戸; 山上　真司; 中野　雅行
Original assignee: シャープ株式会社
Priority date: 2017-07-07
Filing date: 2018-07-05
Publication date: 2019-01-10
Also published as: JP2020153524A

Abstract

In order to control a beverage inside a storage container to an appropriate temperature, this cooling tool 1, which controls the temperature of a beverage inside a bottle 5, is provided with a heat exchange portion, which is filled with a heat storage material that undergoes a phase change at a predetermined temperature and which is configured such that the heat storage material exchanges heat with the beverage, and a wrapping portion 3, which surrounds the bottle 5 and the heat exchange portion, wherein the melting point of the heat storage material is equal to or less than 5°C and is equal to or greater than the freezing temperature of the beverage. Furthermore, the wrapping portion 3 comprises a side surface portion formed in a cylindrical shape and a bottom surface portion connected to one end of the side surface portion and forming a closed surface, and the diameter D1 of the closed-surface side of the side surface portion is greater than the diameter D2 of the opening-end side of the side surface portion.

Description

Cooler

Some aspects of the invention relate to a cryocooler that controls the temperature of the beverage in the storage container.
Priority is claimed on Japanese Patent Application No. 2017-133946, filed July 7, 2017, the content of which is incorporated herein by reference.

Conventionally, there are storage temperatures suitable for heat retaining materials, in particular, beverages such as wine, beer, alcohol such as sake, juices, water, or food products, and pharmaceuticals, respectively. There is a need for a cryostat that can reach the desired storage temperature more quickly and that can be maintained at the desired temperature for an extended period of time. For example, in the case of wine etc. where the temperature is required to drink, a wine cooler covered with ice water is used to cool the wine bottle.

Furthermore, in recent years, a new drinking method has been proposed in which, for sake (alcohol beverages) consumed as hot sake, normal temperature, and cold sake, it is a refrigerated temperature (5 ° C) or less and a temperature not frozen so that the flavor does not change. It is done.

Patent documents

1 and 2 disclose techniques for maintaining wine at an appropriate temperature (temperature range of 5 to 12 ° C.).

Patent No. 4406683 specification JP 2003-202173 A

For example, when cooling alcoholic beverages such as sake, it is possible to bring alcoholic beverages to 5 ° C or lower by using a "freezer" instead of the "refrigerator" of a common household refrigerator, but depending on the alcohol frequency May cause the alcoholic beverage to freeze. For example, in the case of sake having an alcohol content of 15 degrees, freezing at -18.degree. C. has been confirmed. For this reason, when cooling the beverage, it is necessary to control the temperature so as not to reach the freezing temperature.

In addition, the wine cooler disclosed in Patent Document 1 and the cold-keeping insulation tool disclosed in Patent Document 2 are for the purpose of cold-cooling at 5 ° C. or higher, and are the beverages taken out from the refrigerator (5 ° C.) The temperature can not be lowered further. Moreover, it does not have a structure which clamps the cold storage object in order to improve the cold storage effect.

The one aspect of this invention is made in view of such a situation, and it aims at providing the cold-storage tool which can manage the drink in a storage container to appropriate temperature.

In order to achieve the above object, the present invention takes the following measures. That is, the cold-preserving tool according to one aspect of the present invention is a cold-keeping tool for managing the temperature of the beverage in the storage container, and is filled with a heat storage material that changes phase at a predetermined temperature, and the heat storage material is the beverage And a heat exchange unit configured to exchange heat, and a packaging unit surrounding the storage container and the heat exchange unit, wherein the heat storage material has a melting point of 5 ° C. or less and the beverage is frozen It is above the temperature.

According to some aspects of the invention, it is possible to sufficiently cool the beverage without freezing.

It is a figure which shows the outline of the cold-storage tool which concerns on this embodiment. It is the figure which developed the side part of the cold-storage tool which concerns on this embodiment. It is a top view which shows the outline of the heat exchange part of the cold-storage tool which concerns on this embodiment. It is a side view which shows the outline of the heat exchange part of the cold-storage tool which concerns on this embodiment. It is a figure which shows the outline of the cold storage subject used by each Example and a comparative example. It is a graph which shows the freezing temperature confirmation experiment result of sake. It is the figure which plotted Formula (1) about sodium chloride as an example of a water-soluble inorganic salt. FIG. 6 is a view showing temperature changes of the storage container in Example 1. It is a figure which shows the temperature change rate of each storage container in Example 2 and Comparative Example 1. It is the figure which put together the temperature change rate of each storage container in Example 2 and Comparative Example 1. It is a figure which shows the temperature change rate of each storage container in Example 1 and Example 2. FIG. It is the figure which put together the temperature change rate of each storage container in Example 1 and Example 2. FIG. It is a figure which shows the temperature change rate of each storage container in Example 1 and Comparative Example 2. It is the figure which put together the temperature change rate of each storage container in Example 1 and Comparative Example 2. It is the figure which put together the temperature change rate of each storage container in Example 2 and Comparative Example 2.

The present inventors pay attention to the fact that the temperature control according to the beverage is necessary to avoid the inconvenience caused by freezing too much under the situation where needs for cooling and drinking sake are increasing. By using a heat storage material having a melting point of 5 ° C. or less and a freezing temperature of the beverage, it has been found that appropriate temperature control can be performed, and the present invention has been achieved.

That is, the cold-preserving tool according to some aspects of the present invention is a cold-preserving tool for managing the temperature of the beverage in the storage container, and is filled with a heat storage material that changes its phase at a predetermined temperature; A heat exchange unit configured to exchange heat with a beverage, and a packaging unit surrounding the storage container and the heat exchange unit, wherein the heat storage material has a melting point of 5 ° C. or less It is above freezing temperature.

This enabled the inventors to sufficiently cool the beverage without freezing it. Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

[Composition of cold insulation tool]
FIG. 1A is a diagram showing an outline of a cold insulator according to the present embodiment. FIG. 1B is a developed view of a side surface portion of the cold insulator according to the present embodiment. Although the bottom of the heat exchange portion and the bottom surface as a closed surface of the cold storage tool is not shown, the heat exchange portion will be described later, and the bottom is formed in a substantially circular shape of the same material as the packaging material. As shown to FIG. 1A and FIG. 1B, the cold-storage tool 1 which concerns on this embodiment is formed cylindrically by winding so that the packaging material 3 which has a two-dimensional specific shape may overlap by 3a and 3b. This is the side part of the cold insulator 1. In addition, the open end of the cold preservation tool 1 has a shape obtained by obliquely cutting a cylinder, and by storing the bottle 5 as a storage container, the bottle 5 is worn with the front body of the kimono together. Can form an attractive appearance. The fixing belt 7 fixes the neck portion of the bottle 5 and stabilizes the position of the bottle 5 inside the cooling tool 1 and prevents the bottle 5 from being detached from the cooling tool 1 when pouring a beverage or the like.

As shown in FIG. 1A, the diameter D1 on the bottom surface side of the side surface portion formed by the packaging material 3 is larger than the diameter D2 on the opening end side of the side surface portion. This is because, as shown in FIG. 1B, the developed view of the packaging material 3 has a two-dimensional specific shape, and in the developed view, the bottom side which is lower than the paper surface is not a straight line, This is realized because the point P is formed to have an angle of 178 degrees. Thus, since the cold-keeping tool 1 has a so-called “taper”, the opening end of the cold-keeping tool 1 is prevented from opening when the bottle 5 is stored.

Moreover, the cold storage tool 1 is provided with the fastener 9 which mutually locks the overlapping

packaging materials

3a and 3b in the part which the packaging material 3 has overlapped. By locking the

packaging materials

3a and 3b with the fasteners 9, the heat exchange unit 20 to be described later can be closely attached to the bottle 5, and the cooling effect can be enhanced. This point will be described later. In addition, the packaging material 3 comprises the side part of the cold-storage tool 1, and a side part and the bottom part which is not shown in figure comprise a packaging part. In addition, by forming the packaging material 3 with a stretchable material, even when the heat storage material is melted and the volume of the heat storage material shrinks, the adhesion to the bottle 5 can be maintained.

FIG. 2A is a top view showing an outline of a heat exchange part of the cold preservation tool according to the present embodiment. FIG. 2B is a side view showing an outline of a heat exchange part of the cold storage device according to the present embodiment. As shown to FIG. 2A, the heat exchange part 20 is provided with the six thermal storage material accommodating parts 20a which accommodate the thermal storage material 22, and the five connection parts 20b which connect each thermal storage material accommodating part 20a. Thus, by adopting a structure having a plurality of heat storage material storage portions 20a, after the heat storage material 22 is frozen, it is surrounded by the packaging material 3 so as to be in close contact with the bottle 5, thereby making the bottle 5 as a storage container. Contactability is improved. In addition, the appearance at the time of mounting | wearing the bottle 5 becomes slimmer, so that the number of thermal storage material accommodating part 20a and the connection part 20b which comprise the heat exchange part 20 increases. In addition, although six heat-storage material storage parts 20a and five connection parts 20b were shown here, it is not necessarily limited to these numbers.

Further, the heat storage material storage unit 20 a has a curved surface portion 20 c at a portion in contact with the bottle 5. The curved surface portion 20c is formed in a concave shape having a radius of curvature of 37 mm. As a result, the adhesion to the bottle 5 can be improved. As a result, the heat absorptivity from the bottle 5 is improved, and the temperature can be easily lowered. Moreover, the temperature rise of the drink in the bottle 5 is suppressed because the surface area of the bottle 5 which touches external air becomes small. Furthermore, there is no extra protrusion, and it becomes possible to reduce the overall rough condition and to achieve slimming. In the present embodiment, the radius of curvature is 37 mm, but this is not a limitation. The radius of curvature is preferably in the range of 26.5 mm to 46.00 mm, but it may be a curvature size such as a leboworm size having a capacity six times the normal size (750 ml) of a bottle of sake or champagne good. The rigidity of the curved surface portion 20c may be made higher than the rigidity of the other portions. This makes it possible to suppress deformation of the curved surface portion 20c due to volumetric expansion that occurs when the heat storage material is frozen. Further, each heat storage material storage unit 20 a of the heat exchange unit 20 may be filled with a staining solution. Thereby, even if the heat storage material leaks, it becomes possible to recognize at a glance.

[Verify]
Next, in order to verify the effect of the cold insulator according to the present embodiment, an experiment was performed under the following conditions. FIG. 3 is a schematic view of a cold storage object used in each example and comparative example. An object to be cooled is filled in a bottle 5 with sake (alcohol having a degree of 15 degrees, 720 ml) as a liquid to be cooled. The liquid to be cooled (sake) was previously kept cold by a refrigerator (5 ° C.). The ambient temperature is 23 ° C. The following is a table summarizing the configurations of the cold insulators of the respective examples and comparative examples.

The filling height when the liquid to be cooled is filled into the storage container is 200 mm from the bottom of the storage container. Moreover, the temperature measurement point in each Example and the comparative example was (I) liquid center: 100 mm from the bottom, (II) liquid top: 180 mm from the bottom.

[Freezing temperature confirmation experiment]
First, a freezing temperature confirmation experiment of a liquid to be stored (sake) used in the present embodiment was performed. A storage container filled with sake (720 ml) was allowed to stand in a refrigerator, the temperature in the refrigerator was lowered by 1 ° C. every five hours, and experiments were conducted to determine the temperature at which the refrigerator freezes. FIG. 4 is a graph showing the freezing temperature confirmation experiment results of sake. As a result of the experiment, as shown in FIG. 4, it was found that the sake (alcohol degree: 15 ° C.) was frozen when the inside temperature was −18 ° C. From this result, the sake used in this experiment may freeze in the freezer (-18 ° C). Therefore, it is necessary to use a latent heat storage material (heat storage material) having a melting point of 5 ° C. or less and higher than −18 ° C.

[Latent heat storage material]
Here, the latent heat storage material used in the present embodiment will be described. As described above, the latent heat storage material used in the present embodiment is preferably a latent heat storage material having a melting point of 5 ° C. or less and higher than −18 ° C. Furthermore, the melting point of the latent heat storage material is more preferably less than 0 ° C. The latent heat storage material having a temperature of less than 0 ° C. is preferably an aqueous solution of an inorganic salt, and it is more preferable that the concentration of the inorganic salt aqueous solution and the melting point satisfy the relationship of Formula (1).

(T: Melting point (° C)
w: Concentration of inorganic salt (wt%)
M: Molecular weight of inorganic salt (g / mol)
R: Gas constant (J / K · mol)
Tf: Melting point of water (K)
ΔH: heat of melting of water (J / g)
n: number of ions formed when one inorganic salt ionizes in aqueous solution)
Here, w is less than the concentration giving a eutectic of water and the water-soluble inorganic salt.

Thus, the latent heat storage material having a desired melting point can be designed simply by changing the concentration of the water-soluble inorganic salt. In addition, Formula (1) is established with a dilute aqueous solution having a concentration less than the concentration at which w gives a eutectic with the water-soluble inorganic salt. A eutectic is obtained near the concentration at which w gives a eutectic with the water-soluble inorganic salt. In the eutectic state, a single melting point is exhibited, and the latent heat is high. Therefore, the cold storage temperature tends to be constant, and long-term cold storage is possible.

Further, as the inorganic salt, sodium chloride, potassium chloride, calcium chloride, magnesium chloride, barium chloride, ammonium chloride, potassium hydrogencarbonate, sodium bicarbonate, sodium carbonate, sodium nitrate, potassium nitrate, calcium nitrate and magnesium nitrate are preferable. Moreover, it is preferable that the density | concentration of inorganic salt is below the density | concentration which gives the eutectic of each inorganic salt and water. When an amount exceeding the concentration giving the eutectic is added, the temperature does not fall below the melting point at the concentration giving the eutectic and the latent heat per weight decreases because the inorganic salt precipitates excessively.

FIG. 5 is another diagram in which formula (1) is plotted for sodium chloride as an example of the water-soluble inorganic salt. The concentration at which water and sodium chloride give a eutectic is 23.3 wt%, and FIG. 5 is a diagram in which the region below the concentration giving a eutectic is plotted. If the temperature at which the liquid to be stored is to be stored is determined, high-precision setting of the melting point of the latent heat storage material is required. However, the concentration of inorganic salt can be calculated using FIG. It becomes possible to determine the composition ratio and material of the heat storage material. Moreover, although the melting point of water and sodium chloride is -21 ° C, even if it is higher than the melting point of the eutectic, latent heat storage of a desired melting point is achieved by adjusting the concentration of the inorganic salt using formula (1) The material can be obtained. Also, near the eutectic concentration of water and inorganic salt, a eutectic having a single melting point is obtained. In addition, the inorganic salt which comprises a latent heat storage material may be only 1 type among the inorganic salts mentioned above, and what mixed several inorganic salt may be used. By using a latent heat storage material having a melting point of less than 0 ° C., it is possible to cool below the freezing point that can not be realized with ice.

Next, using the latent heat storage material having the above melting point, the difference in performance depending on the configuration of the cold insulator was verified.

[1. Cooling performance / Example 1]
Example 1
Packaging: Tapered, with fasteners 9.
-The temperature for 120 minutes was measured after attaching the heat exchange part 20 and the packaging material 3 with respect to the storage container (bottle 5).
The temperature was measured at the liquid center, outside the heat exchange unit 20 (between the packaging material and the container).

FIG. 6 is a view showing temperature change of the storage container in the first embodiment. As shown in FIG. 6, the temperature of the liquid core portion cooled by the refrigerator (5 ° C.) is cooled to below freezing in about 23 minutes. The cryocooler of Example 1 was found to have a cooling performance of freezing below 30 minutes. Moreover, although the temperature of the liquid center part was cooled toward the heat exchange part (cold storage material) temperature, it turned out that it did not freeze even two hours after the cooling start.

[2. Effect of presence / absence of taper / comparison of Example 2 and Comparative Example 1]
Next, the effect of the presence or absence of the taper was verified using Example 2 and Comparative Example 1. The comparison method performed the comparison with the normalized value using the temperature change calculated by Formula (2) shown below. This is because the temperature when taken out from the refrigerator is different.

Temperature change rate = (liquid temperature at measurement-initial liquid temperature) / initial liquid temperature ... (2)
Here, the temperature change rate of 0 or more means temperature rise, and less than 0 means temperature fall.

(Example 2)
Packaging: Tapered, without fasteners 9.
-The temperature for 30 minutes was measured after mounting the heat exchange part 20 and the packaging material 3 with respect to the storage container (bottle 5).
The temperature was measured at the center of the liquid and at the top of the liquid.
(Comparative example 1)
-Packaging material: No taper, no fastener 9.
-The temperature for 30 minutes was measured after mounting the heat exchange part 20 and the packaging material 3 with respect to the storage container (bottle 5).
The temperature was measured at the center of the liquid and at the top of the liquid.

FIG. 7A is a view showing a temperature change rate of each storage container in Example 2 and Comparative Example 1. FIG. 7B is a diagram summarizing temperature change rates of the respective storage containers in Example 2 and Comparative Example 1. About the temperature change ratio after 30 minutes, about "liquid center", almost no difference was seen. That is, Comparative Example 1 is low by only 3%, which means that the temperature decrease rate is high by 3%, which means that it was cooled. On the other hand, regarding the “liquid upper portion”, the temperature change rate of Comparative Example 1 was 22% higher than the temperature change rate of Example 2. That is, it can be said that the temperature of the liquid upper portion is 22% higher, and the temperature is easy to rise.

As a result of the above, by providing the taper, a cooling effect can be obtained at the liquid center, and an effect of suppressing the temperature rise can be obtained at the liquid top, and in particular, the temperature rise rate of the liquid top can be suppressed. It turned out that it became.

[3. Effect of presence / absence of fastener / Comparison of Example 1 and Example 2]
Next, the effect of the presence or absence of the fastener 9 was verified using Example 1 and Example 2. The comparison method compared in the method similar to the comparison method of the effect of the presence or absence of a taper.

Example 1
-Packaging material: It was tapered, and there was a fastener (magic tape (registered trademark)).
-The temperature for 30 minutes was measured after mounting the heat exchange part 20 and the packaging material 3 with respect to the storage container (bottle 5).
The temperature was measured at the center of the liquid and at the top of the liquid.
(Example 2)
-Packaging material: with taper, without fastener-With respect to the storage container (bottle 5), the temperature was measured for 30 minutes after the heat exchange unit 20 and the packaging material 3 were attached.
The temperature was measured at the center of the liquid and at the top of the liquid.

FIG. 8A is a view showing a temperature change rate of each storage container in Example 1 and Example 2. FIG. 8B is a diagram summarizing temperature change rates of the respective storage containers in Example 1 and Example 2. As shown in FIG. 8B, the temperature change rate of Example 1 is 8% lower than that of Example 2 in the “liquid upper portion”, and is 28% lower than that of Example 2 in the “liquid center portion”. . That is, it was found that the provision of the fastener 9 makes it possible to lower the temperature rise rate in both the liquid upper portion and the liquid center portion, and in particular, it is possible to lower the temperature rise in the liquid center portion. Although Velcro (registered trademark) is used as the fastener 9 in the present embodiment, anything may be used as long as the overlapping portion of the packaging material 3 can be locked, and the present invention is not limited to this.

[4. Effect of Coverage Ratio / Comparison of Example 1, Example 2 and Comparative Example 2]
Next, the effect of the coverage was verified using Example 1, Example 2 and Comparative Example 2. That is, the heat exchange unit 20 compares the filling height of the beverage in the bottle 5 according to how much it covers. The configuration other than the coverage, the temperature measurement point, and the temperature measurement time are the same as those in the above-described respective verifications.

(Example 1, Example 2)
Cover rate: 87.0%
The other configurations, the temperature measurement points, and the temperature measurement time are the same as those described above.

(Comparative example 2)
Coverage rate: 79.5%
The other configurations, the temperature measurement points, and the temperature measurement time are the same as those described above.

FIG. 9A is a view showing a temperature change rate of each storage container in Example 1 and Comparative Example 2. FIG. 9B is a diagram summarizing temperature change rates of the respective storage containers in Example 1 and Comparative Example 2. As shown in FIG. 9B, the temperature change rate of the “liquid center” is 14% higher in Comparative Example 2. Further, the temperature change rate of the “liquid upper portion” is also 5% higher in Comparative Example 2. That is, it was found that the cooling performance is improved by increasing the coverage.

FIG. 9C is a diagram summarizing temperature change rates of the respective storage containers in Example 2 and Comparative Example 2. As shown in FIG. 9C, when the temperature change rates after 30 minutes in Example 2 and Comparative Example 2 were compared, it was found that Comparative Example 2 had higher cooling performance than Example 2. Therefore, it was found that it is possible to improve the cooling performance if at least the coverage is 79.5% or more.

In addition, in the manufacturing process of the heat exchange part 20, in order to improve the operativity at the time of filling, it is desirable for the thermal storage material 22 to have thickening property. In this case, it can be realized by mixing the heat storage material 22 with a thickener.

Moreover, storage containers, such as bottle 5 etc. which are filled with liquid for cooling, may have a temperature display function in at least one part. For this temperature display function, for example, a temperature indicator may be applied (printed) on a storage container such as the bottle 5 or the storage container itself may be made of a material containing the temperature indicator. This makes it possible to grasp the temperature of the liquid to be cooled. Furthermore, it is more preferable to discolor or decolor the temperature indicator at 6 ° C. (or refrigeration temperature). This is based on the premise that the beverage kept cold in the refrigerator compartment is further cooled, it can be understood whether the storage container is in the cold storage temperature zone, the timing for wearing the cooling implement can be known, and the user can use the cold insulator This makes it possible to know the appropriate timing for achieving the original performance of

Furthermore, the present invention can also adopt the following aspects.

(A) A cold-preserving tool according to an aspect of the present invention is a cold-preserving tool for managing the temperature of a beverage in a storage container, which is filled with a heat storage material that changes phase at a predetermined temperature, and the heat storage material is A heat exchange unit configured to exchange heat with a beverage, and a packaging unit surrounding the storage container and the heat exchange unit, wherein the heat storage material has a melting point of 5 ° C. or less It is above freezing temperature.

(B) Moreover, in the cold-storage tool which concerns on one form of this invention, the said packaging part is equipped with the side part formed in cylindrical shape, and the bottom face part couple | bonded with one end of the said side part and forming a closed surface. The diameter on the closed surface side of the side surface portion is larger than the diameter on the opening end side of the side surface portion.

(C) In the cooling tool according to one aspect of the present invention, the side surface portion is formed in a cylindrical shape by being wound so that a packaging material having a two-dimensional specific shape partially overlaps. There is.

(D) Moreover, the cold-storage tool which concerns on one form of this invention is provided in the part which the said packaging material has overlapped, and is further provided with the fastener which mutually locks the said each packaging material.

(E) In the cold preservation tool according to one aspect of the present invention, the heat exchange unit includes a plurality of heat storage material storage units that store the heat storage material, and a connection unit that connects the heat storage material storage units. And contact along the surface of the storage container.

(F) Moreover, in the cold preservation tool which concerns on one form of this invention, each said thermal storage material storage part has a curved surface part which contacts the said storage container and fits the surface of the said storage container.

(G) Moreover, in the cold preservation tool which concerns on one form of this invention, the said heat exchange part coat | covers 79.5% or more with respect to the filling height of the said drink in the said storage container.

(H) Moreover, in the cold-storage tool which concerns on one form of this invention, melting | fusing point of the said thermal storage material is less than 0 degreeC.

(I) Moreover, in the cold-storage tool which concerns on one form of this invention, the said thermal storage material contains water and water-soluble inorganic salt, and when melting | fusing point is set to T, the said (1) Formula is satisfy | filled.

(J) Further, the heat storage material contains water and a water-soluble inorganic salt, and the concentration by weight of the water-soluble inorganic salt is a concentration giving a eutectic of water and the water-soluble inorganic salt.

(K) Moreover, the cold-packing tool which concerns on one form of this invention WHEREIN: The said packaging material was formed with the elastic raw material.

(L) Moreover, in the cold preservation tool which concerns on one form of this invention, the said curved-surface part has rigidity higher than the rigidity of parts other than the said curved-surface part.

(M) Moreover, in the cold-storage tool which concerns on one form of this invention, the said heat exchange part is filled with stain | dye liquid.

As described above, according to the present embodiment, it is possible to sufficiently cool the beverage without freezing it.

Some aspects of the present invention can be applied to, for example, a cold insulator that can control the beverage in the storage container at an appropriate temperature.

Claims

A cooling tool for controlling the temperature of the beverage in the storage container,
A heat exchange section filled with a heat storage material that changes phase at a predetermined temperature, and the heat storage material is configured to exchange heat with the beverage;
And a packaging unit surrounding the storage container and the heat exchange unit,
The cold storage tool, wherein the heat storage material has a melting point of 5 ° C. or less and a freezing temperature of the beverage.
The packaging portion has a cylindrical side surface portion,
A bottom portion coupled with one end of the side portion to form a closed surface;
The cold preservation tool according to claim 1, wherein a diameter of the side surface on the closed surface side is larger than a diameter of the open end side of the side surface.
The said side part is cylindrically formed by winding so that the packaging material which has a two-dimensional specific shape may overlap in part.
The cold-preserving device according to claim 3, further comprising a fastener provided at an overlapping portion of the wrapping material and locking the wrapping materials to each other.
The heat exchange unit is
A plurality of heat storage material storage sections for storing the heat storage material;
A connecting portion connecting the heat storage material storage portions;
The cooling tool according to any one of claims 1 to 4, contacting along the surface of the storage container.
The cold storage tool according to claim 5, wherein each of the heat storage material storage portions has a curved surface portion that is in contact with the storage container and that fits on the surface of the storage container.
The cold storage device according to any one of claims 1 to 6, wherein the heat exchange portion covers 79.5% or more of the filling height of the beverage in the storage container.
The cold storage tool according to any one of claims 1 to 7, wherein the melting point of the heat storage material is less than 0 ° C.
The heat storage material contains water and a water-soluble inorganic salt,
Let the melting point be T,
The cold-storing tool according to any one of claims 1 to 8, wherein the following equation is satisfied when w is less than a concentration that gives a eutectic of water and the water-soluble inorganic salt.

(T: Melting point (° C)
w: Concentration of inorganic salt (wt%)
M: Molecular weight of inorganic salt (g / mol)
R: Gas constant (J / K · mol)
Tf: Melting point of water (K)
ΔH: heat of melting of water (J / g)
n: number of ions formed when one inorganic salt ionizes in aqueous solution)
The heat storage material contains water and a water-soluble inorganic salt,
The cooling tool according to any one of claims 1 to 8, wherein a weight percent concentration of the water soluble inorganic salt is a concentration giving a eutectic of water and the water soluble inorganic salt.
The cooling material according to claim 3 or 4, wherein the packaging material is formed of a stretchable material.
The cold tool according to claim 6, wherein the curved surface portion has a rigidity higher than the rigidity of a portion other than the curved surface portion.
The cold storage device according to any one of claims 1 to 12, wherein the heat exchange part is filled with a staining solution.