WO2021059888A1

WO2021059888A1 - Cold-insulating tool

Info

Publication number: WO2021059888A1
Application number: PCT/JP2020/033029
Authority: WO
Inventors: 大祐篠崎; 夕香内海; 勝一香村; 輝心黄; 哲本並
Original assignee: シャープ株式会社
Priority date: 2019-09-27
Filing date: 2020-09-01
Publication date: 2021-04-01

Abstract

The present invention provides sufficient cooling time and increases the contact area with a site to be cooled. This cold-insulating tool comprises at least one cold storage pack which includes: a cold storage material which has a solid phase volume that is smaller than the liquid phase volume; and a packaging bag. The packaging bag includes: a tubular part which is formed by sealing the inner surfaces of both ends of a film so that a back-seal part extending in a first direction is provided and which is filled with the cold storage material; and first and second seal parts which seal respective ends of the tubular part and extend in a second direction intersecting the first direction.

Description

Cold storage

The present invention relates to a cold insulator.
The present application claims priority based on Japanese Patent Application No. 2019-177246 filed in Japan on September 27, 2019, the contents of which are incorporated herein by reference.

As shown in Patent Document 1, for example, a conventional cold insulator is configured by storing a large number of separate and independent granular heat storage materials in an outer bag. With such a configuration, the contact property to the affected part of the human body having a curved surface and the wearing stability are improved.

Japanese Unexamined Patent Publication No. 9-1733373

However, in the cold insulation device of Patent Document 1, the surface area per unit weight is increased because the heat storage material is granulated. As a result, heat exchange with the outside is promoted, and the temperature maintenance time is shortened as compared with the non-granular heat storage material of the same weight.

Therefore, one aspect of the present invention is to provide a cooling device capable of increasing the contact area with a cooling object such as a human body while ensuring a sufficient cooling time (temperature maintenance time). ..

One aspect of the cold insulator of the present invention includes a cold storage material whose volume at the solid phase is smaller than the volume at the liquid phase, and a backing portion extending in the first direction in which the inner surfaces of both ends of the film are sealed. A tubular portion provided and filled with the cold storage material, and first and second sealing portions extending in a second direction intersecting the first direction in which both end portions of the tubular portion are sealed. It is characterized by comprising a packaging bag to have and at least one cold storage pack containing the bag.

According to the cold insulation device of one aspect of the present invention, it is possible to increase the contact area with the object to be cooled while ensuring a sufficient cooling time.

It is the schematic which shows the structure of the cold insulation device of 1st Embodiment of this invention. It is a figure which shows one process of the manufacturing method of the packaging bag in the cold insulation device shown in FIG. It is a schematic view of the cross section of the cold insulation tool along the alternate long and short dash line shown in FIG. 1, FIG. 3A is a diagram showing a cross section when the cold storage material is in a liquid phase, and FIG. 3B is a diagram showing a cross section of the cold storage material. It is a figure which shows the cross section at the time of a solid phase. It is a figure for demonstrating the effect of the cool pack according to the Example of 1st Embodiment of this invention, and FIG. 4 (a) shows the state of a liquid phase and a solid phase of a cold storage material in the cool pack of an Example. FIG. 4B is a photograph of the cold storage material in the comparative example, in which the cold storage material is in a liquid phase state and a solid phase state. It is a figure for demonstrating the method of evaluating the contact property of the cold insulation device of an Example and the cold insulation device of a comparative example using thermography. It is a figure for demonstrating the effect of the cold insulation device of an Example by the evaluation method shown in FIG. 5, and FIG. 6A is a figure which shows the measurement result by thermography by the evaluation method shown in FIG. 5 of the cold insulation device of an Example. 6 (b) is a diagram showing the measurement results by thermography by the evaluation method shown in FIG. 5 of the cold insulation device of the comparative example. It is the schematic which shows the structure of the cold insulation device of the 2nd Embodiment of this invention. It is a figure which shows the manufacturing method of the cold insulation equipment shown in FIG. 7. It is a figure which shows an example of the use method of the cold insulation equipment shown in FIG. 7. It is a figure which shows the modification of the cold insulation device shown in FIG. 7. It is a figure which shows another modification of the cold insulation device shown in FIG. 7. It is the schematic which shows the use example of the cold insulation device shown in FIG. It is the schematic which shows the structure of the cold insulation device of 3rd Embodiment of this invention. It is a figure which shows one step of the manufacturing method of the cold insulation device shown in FIG.

Hereinafter, a mode for carrying out the present invention will be described in detail with reference to the drawings.

[First Embodiment]
The cold insulation device 100 of the first embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a schematic view showing the configuration of the cold insulation device 100 according to the first embodiment of the present invention. 2 (a) and 2 (b) are views showing one step of a method for manufacturing the packaging bag 120 in the cold insulation tool 100 shown in FIG. The cold insulation device 100 alone of the present embodiment is also referred to as a "cold storage pack".

As shown in FIG. 1, the cold insulation device 100 of the first embodiment includes a cold storage material 110 and a packaging bag 120 having a tubular portion 121 filled with the cold storage material 110. The cold storage material 110 is composed of a material whose volume shrinks when the phase changes from a liquid to a solid, that is, a material whose volume at the time of solid phase (freezing) is smaller than that at the time of liquid phase. The packaging bag 120 extends in the backing portion 122 extending in the Y direction (first direction) and in the X direction (second direction) intersecting the Y direction, and is provided at both ends of the tubular portion 121. It has a seal portion 123 and a seal portion 124.

The packaging bag 120 is manufactured as follows. First, as shown in FIG. 2A, a cold storage pack film 125 is prepared. Next, as shown in FIGS. 2 (a) and 2 (b), the inner surfaces 126 of both ends of the cold storage pack film 125 are bonded to each other and sealed to form a back-attached portion 122. As a result, the tubular portion 121 is formed. After that, both

end portions

127 and 128 of the tubular portion 121 shown in FIG. 2B are sealed to form the seal portion 123 and the seal portion 124 shown in FIG.

As the cold storage pack film 125, for example, a tech barrier (registered) which is a laminated film of several μm Si (silicon) vapor deposition / 15 μm NY (nylon) / 15 μm PE (polyethylene) / 30 μm LLDP (low density polyethylene). A nylon film which is a laminated film of 15 μm NY / 30 μm LLDP and an aluminum vapor-deposited film which is a laminated film of 15 μm NY / 12 μm VMPET (aluminum-deposited PET film) / 70 μm LLDP can be used.

Further, as the cold storage material 110, a material having a melting point at a desired temperature according to the object to be kept cold of the cold insulation tool 100 and having a volume smaller than that in the liquid phase is used as described above. Examples of the material whose volume in the solid phase is smaller than the volume in the liquid phase include clathrate hydrate and quasi-cleathrate hydrate.

Clathrate hydrate is a relatively small molecule with a molecular weight of 200 or less, such as tetrahydrofuran or cyclohexane, in the voids in a cage-shaped clathrate lattice composed of hydrogen bonds of water molecules, which are host molecules. A compound in which guest molecules are incorporated and crystallized.

The quasi-clathrate hydrate is a cage of hydrogen bonds such as a guest molecule with a relatively large molecular size such as a tetraalkylammonium cation so that the water molecule, which is the host molecule, avoids the alkyl chain of the guest molecule. A compound that forms an inclusion lattice and crystallizes by wrapping a guest molecule. The cage-shaped inclusion lattice composed of hydrogen bonds of quasi-clathrate hydrate encloses guest molecules having a relatively large molecular size as described above, so that the cage-like inclusion lattice composed of hydrogen bonds of water molecules encloses the guest molecules. Unlike the tangent lattice, it crystallizes in a partially broken state. Therefore, it is called quasi-clathrate hydrate.

By using these clathrate hydrates and quasi-clathrate hydrates as materials whose volume in the solid phase is smaller than that in the liquid phase, it is possible to give a melting point in the positive temperature zone. For example, as a material having a melting point at 12 ° C. and having a volume smaller than that in the liquid phase, a tetrabutylammonium bromide solution adjusted to a concentration near the harmonic melting point using water as a solvent can be mentioned. Be done. Further, for example, as a material having a melting point at 7 ° C. and the volume at the solid phase is smaller than the volume at the liquid phase, a tetrabutylammonium bromide solution adjusted to a concentration near the harmonic melting point using water as a solvent is used. Examples include materials to which potassium nitrate is added. Further, for example, as a material having a melting point at 3 ° C. and the volume at the solid phase is smaller than the volume at the liquid phase, a tetrabutylammonium bromide solution adjusted to a concentration near the harmonic melting point using water as a solvent is used. Examples include materials to which potassium bromide has been added.

Here, to give a specific example of the volume change rate at the solid phase with respect to the liquid phase of a material whose volume at the solid phase is smaller than the volume at the liquid phase, for example, the above-mentioned water having a melting point at 12 ° C. is used as a solvent. The tetrabutylammonium bromide solution adjusted to a concentration near the harmonic melting point is prepared by using the above-mentioned water having a melting point of about 95% and 7 ° C. as a solvent to prepare a tetrabutylammonium bromide solution adjusted to a concentration near the harmonic melting point. The material to which potassium nitrate was added was about 98%, and the above-mentioned water having a melting point at 3 ° C. was used as a solvent, and the material to which potassium bromide was added to a tetrabutylammonium bromide solution adjusted to a concentration near the harmonic melting point was about 98. It becomes%. In contrast, water is about 105%. That is, water is a material whose volume in the solid phase is larger than that in the liquid phase.

In particular, for a material having a melting point at 12 ° C. and a volume at the solid phase smaller than the volume at the liquid phase, an additive for the purpose of suppressing supercooling may be added. The above-mentioned material having a melting point of 12 ° C. requires an environmental temperature of about −5 ° C. for freezing. For example, when freezing at home, it is frozen in a freezer. When the material is used as the cold storage material 110 of the cold storage material 100, the melting point of the cold storage material 110 after taking out the cold storage material 100 in a frozen state of the cold storage material 110, that is, the temperature at which the cold storage material 100 is used 12 It will take a relatively long time to reach ° C. Therefore, by adding an additive that suppresses supercooling to the above-mentioned material, the environmental temperature required for freezing is made higher than the above-mentioned −5 ° C. As a result, the time required for the material to reach the melting point of 12 ° C. from the frozen state can be shortened, so that the cold insulator 100 can be used in a short time after being taken out from the freezer. Specific examples of the additive include calcium carbonate, sodium hydrogen phosphate and its hydrate, sodium carbonate, sodium tetraborate and its hydrate.

Next, the effect of the cold insulation device 100 of the present embodiment configured as described above will be described.

FIG. 3 is a schematic view of a cross section of the cold insulation tool 100 along the alternate long and short dash line C shown in FIG. 1, and FIG. 3 (a) shows a cross section when the cold storage material 110 is in the liquid phase, and is shown in FIG. 3 (b). ) Indicates a cross section when the cold storage material 110 is in a solid phase.

When the cold storage material 110 is in the liquid phase, the cross-sectional shape of the cold insulation tool 100 is substantially elliptical as shown in FIG. 3A.

On the other hand, when the cold storage material 110 is in a solid phase, as shown in FIG. 3B, the cross-sectional shape of the cold insulation tool 100 is the surface F1 side with the back sticking portion 122 and the surface F1 with the back sticking portion 122. The shape has two straight lines on the opposite surfaces F2 side and a curved line connecting the two straight lines on both sides of the two straight lines. That is, when the cold storage material 110 is in a solid phase, a substantially flat surface is formed on each of the surface F1 side and the surface F2 side of the cold insulation tool 100. Note that FIG. 3B is just a schematic view, and in reality, a completely flat surface as shown in the figure is not formed on the surface F1 side and the surface F2 side, but a surface having high flatness is formed. Is obtained.

As described above, according to the present embodiment, the cold storage material 110 to be filled in the packaging bag 120 is made of a material whose volume at the solid phase is smaller than the volume at the liquid phase, and as shown in FIG. 1, the packaging bag 120 is used. By having a backing portion 122 extending in the Y direction, a seal portion 123 extending in the X direction intersecting the Y direction, and a seal portion 124, both side portions L1 of the tubular portion 121 in the X direction, The shape is such that there is no seal portion in any of L2. With this configuration, when the cold storage material 110 changes from the liquid phase to the solid phase, the cold storage material 110 is in a state where the restrictions on the shape change when freezing are small due to the shapes of the side portions L1 and L2 of the tubular portion 121. It will freeze while shrinking in volume. As a result, the surface F1 having the backing portion 122 and the surface F2 facing the surface F1 (see FIG. 3B) can be made a highly flat surface.

Therefore, according to the present embodiment, the surface F1 and the surface F2 are flattened by freezing the cold storage material 110 (as a solid phase) and bringing the surface F1 or the surface F2 of the cold insulation tool 100 into contact with a cold insulation object such as a human body. Since it has a high property, it is possible to increase the contact area with the object to be cooled. Further, in the cold storage material 110 of the present embodiment, unlike the cold insulation tool of Patent Document 1, the cold storage material is not granular but is a lump at the time of solid phase, so that the surface area per unit weight can be reduced, and the surface area per unit weight can be reduced. Since the heat exchange is suppressed, a sufficient cooling time (temperature maintenance time) can be secured.

In the present embodiment, when the back sticking portion 122 is provided at a position close to either of both side portions L1 and L2 of the tubular portion 121, the shape of the side portion where the back sticking portion 122 is located near is changed to that side. By approaching the shape when the portion is sealed, the limitation on the shape change when the cold storage material 110 freezes becomes large, and it may be difficult to obtain the desired flatness on the surfaces F1 and F2. There is. Therefore, as shown in FIG. 1, it is desirable that the backing portion 122 is provided so as to intersect at substantially the center of each of the seal portion 123 and the seal portion 124.

Further, if the length of the backing portion 122 is short, the restrictions by the sealing portion 123 and the sealing portion 124 on the shape change when the cold storage material 110 filled in the tubular portion 121 freezes become large, and the surfaces F1 and the surface become large. It may be difficult to obtain the desired flatness in F2. Therefore, as shown in FIG. 1, it is preferable that the length of the backing portion 122 is at least longer than the length of the sealing portion 123 and the sealing portion 124.

Next, with reference to FIGS. 4 to 6, the effect of the cold storage device 10 according to the embodiment, which is a specific example of the present embodiment, will be described by comparison with the cold storage device 20 according to the comparative example.

As the cold insulation tool 10 of the embodiment, in the cold insulation tool 100 having the structure shown in FIG. 1, the length in the Y direction is 110 mm, the length of each of the

seal portions

123 and 124 in the X direction is 55 mm, and the

seal portions

123 and 124 are respectively. In a packaging bag 120 having a length of 5 mm in the Y direction, the above-mentioned water having a melting point of 3 ° C. as a cold storage material 110 was used as a solvent, and potassium bromide was added to a tetrabutylammonium bromide solution adjusted to a concentration near the harmonized melting point. A material filled with 50 g of the material to which was added was prepared. For the packaging bag 120, an aluminum vapor-deposited film, which is a laminated film of 15 μm NY / 12 μm VMPET / 70 μm LLDP, was used.

The cold insulation tool 10 is formed by setting a film in an automatic packaging machine called a vertical pillow type, fixing the film in a tubular shape with a former, and pasting the inner surfaces of both ends of the film to form a back-pasted portion. After sealing the bottom (corresponding to the position of the sealing part 123) with a heat sealer installed in the direction (X direction) perpendicular to the extending direction (Y direction), a cold storage material (water is used as a solvent and near the harmonized melting point). It was prepared by filling a tetrabutylammonium bromide solution adjusted to the concentration of (a material obtained by adding potassium bromide) and feeding a film to seal the upper part (corresponding to the position of the sealing portion 124).

As the cold insulator 20 of the comparative example, a packaging bag having the same structure and the same material as the cold insulator 10 of the embodiment was filled with 50 g of water, which is a material whose volume at the solid phase is larger than that at the liquid phase as a cold storage material. I prepared something.

FIG. 4A shows a state in which the cold storage material (a material in which water is used as a solvent and potassium bromide is added to a tetrabutylammonium bromide solution adjusted to a concentration near the harmonic melting point) is in the liquid phase in the cold insulation tool 10 of the example. 4 (b) is a photograph of the state of the liquid phase and the state of the solid phase of the cold storage material (water) in the cold insulation tool 20 according to the comparative example. In each of FIGS. 4A and 4B, the upper row (T :) is a photograph of the cold insulation device taken from the direction of the arrow T shown in FIG. 1, and the lower row (S :) is the direction of the arrow S shown in FIG. Shows a picture of the cold storage equipment taken from.

When the cold storage material is in a liquid phase, as shown in FIGS. 4A and 4B, both the cold insulation tool 10 of the example and the cold insulation tool 20 of the comparative example have a back-pasted surface and a back-pasted portion. Both the surface with the portion and the surface facing each other became substantially flat surfaces.

On the other hand, when the cold storage material is in a solid phase state, as shown in FIG. 4 (a), in the cold insulation tool 10 of the embodiment, both the surface having the back-pasted portion and the surface facing the back-attached portion are substantially abbreviated. A flat surface was obtained. The ratio of the width and the thickness (corresponding to the width w and the thickness t shown in the cross-sectional view of the cold storage tool 100 in FIG. 3B) in the cross section of the cold storage tool 10 at this time was about 5: 1. .. On the other hand, as shown in FIG. 4B, in the cold insulation tool 20 of the comparative example, both the surface having the back-pasted portion and the surface facing the surface having the back-pasted portion have a distorted shape and low flatness. It became a face.

From the above, it was confirmed that according to the cold insulation tool 10 of the example, higher flatness can be obtained at the solid phase as compared with the cold insulation tool 20 of the comparative example.

FIG. 5 is a diagram for explaining a method of evaluating the contact property between the cold insulation tool 10 of the example and the cold insulation tool 20 of the comparative example by using thermography.

As shown in FIG. 5A, even if the cold insulation tool 10 is installed, the shape of the contact surface with the cold insulation tool 10 does not change depending on the weight of the cold insulation tool 10, and the cooling surface 2 has a sufficiently flat surface. The object to be cooled (here, a desk is used) 1 and the cold storage material (a material in which potassium bromide is added to a tetrabutylammonium bromide solution adjusted to a concentration near the harmonious melting point using water as a solvent) are in a solid phase state. The cold insulation device 10 of a certain embodiment was prepared. Next, as shown in FIG. 5B, the cold insulation tool 10 of the embodiment is placed on the cooling surface 2 of the object to be cooled 1, the surface F1 having the backing portion is facing up, and the surface F1 having the backing portion is facing up. After placing the surface F2 facing the cooling surface 2 against the cooling surface 2 for 10 seconds, the surface F2 is removed from the cooling surface 2, and then, as shown in FIG. 5C, the object to be cooled is cooled by the thermography device 3. The temperature of the region 4 cooled by the cooler 10 on the cooling surface 2 of 1 was measured. Further, although not shown, the same measurement is performed when the cooling tool 10 of the embodiment is placed on the cooling surface 2 of the object to be cooled 1 with the surface F2 facing up and the surface F1 is applied to the cooling surface 2. It was.

Similarly, instead of the cold insulation tool 10 of the example, the cold insulation tool 20 of the comparative example in which the cold storage material (water) is in a solid phase state is placed on the cooling surface 2 of the cooling object 1 for 10 seconds. , The temperature of the region 4 cooled by the cooler 20 on the cooling surface 2 of the object 1 to be cooled was measured by the thermography device 3. Regarding the cold insulation tool 20 of the comparative example, as in the case of the cold insulation tool 10 of the embodiment, the surface F1 is turned up and the surface F2 is applied to the cooling surface 2, and the surface F2 is turned up and the surface F1 is applied to the cooling surface 2. Measurements were made in both cases.

FIG. 6 is a diagram for explaining the effect of the cold insulation tool 10 of the embodiment by the evaluation method shown in FIG. 5, and FIG. 6 (a) shows the surface F1 of the cold insulation tool 10 of the embodiment applied to the cooling surface 2. After that, and after the surface F2 was applied to the cooling surface 2, the measurement results by thermography of the cooling surface 2 including each cooled region 4 are shown. FIG. 6B shows the surface F1 of the cooling device 20 of the comparative example. The temperature measurement result by thermography of the cooling surface 2 including each cooled region 4 is shown after the surface F2 is applied to the cooling surface 2 and after the surface F2 is applied to the cooling surface 2.

As shown in FIG. 6A, in the cold insulation tool 10 of the embodiment, the temperature of the region 4 cooled on the cooling surface 2 was originally around 30 ° C. on both the surface F1 and the surface F2, but is 20 ° C. or less. A portion of 30 cm ² or more was obtained. On the other hand, as shown in FIG. 6B, in the cold insulator 20 of the comparative example, on the surface F2, the portion where the temperature of the cooled region 4 on the cooling surface 2 is 20 ° C. or less is 14 cm ² or less. On the surface F1, the portion of the cooling surface 2 where the temperature of the cooled region 4 was 20 ° C. or less was further narrowed to ^{4 cm 2 or less.}

From the above, according to the cold insulation tool 10 of the example, higher flatness is obtained on the surface F1 and the surface F2 at the solid phase of the cold storage material as compared with the cold insulation tool 20 of the comparative example, and the contact area with the object to be cooled is obtained. It was confirmed that a large amount can be taken.

[Second Embodiment]
The cold insulation device 200 of the second embodiment of the present invention will be described with reference to FIGS. 7 to 12. In FIGS. 7 to 12, the same components as those of the cold storage device (cold storage pack) 100 of the first embodiment described with reference to FIGS. 1 to 3 are designated by the same reference numerals, and duplicate description will be omitted as appropriate. To do.

FIG. 7 is a schematic view showing the configuration of the cold insulation device 200 according to the second embodiment of the present invention. Further, FIG. 8 is a diagram showing a method of manufacturing the cold insulation tool 200 shown in FIG. 7.

As shown in FIG. 7, the cold storage device 200 of the second embodiment includes an outer bag 210 and four cold storage packs 100 shown in FIG. The outer bag 210 has four bag portions 211 arranged side by side in the X direction (second direction), and a connecting portion 212 connecting adjacent bag portions 211 in the four bag portions 211. The four cold storage packs 100 are stored in each of the four bag portions 211 so that the extending direction of the backing portion 122 of the cold storage pack 100 coincides with the Y direction.

Further, the outer bag 210 of the present embodiment includes a seal portion 213 that seals the lower end portion in the Y direction and a seal portion 214 that seals the upper end portion in the Y direction, whereby the cold storage pack 100 is packed in the bag portion. It is prevented from going out of 211.

The connection portion 212 of the outer bag 210 has flexibility so as to be flexible when the cold storage material 110 (see FIG. 1 and the like) in the cold storage pack 100 is in a solid phase, that is, when the cold storage material 110 is frozen. It is desirable to do. The reason will be described later.

The cold insulation device 200 of the present embodiment is manufactured as follows. First, as shown in FIG. 8A, a tubular outer bag film 220 having

openings

221 and 222 at the top and bottom in the Y direction is prepared. Next, as shown in FIG. 8B, the inner surfaces of the outer bag film 220 are partially bonded to each other in the Y direction at intervals in the X direction to form three connecting portions 212. .. As a result, an outer bag 210 having three connecting portions 212 and four bag portions 211 divided in the X direction by the connecting portions 212 is formed. After that, as shown in FIG. 8C, the seal portion 213 is formed by sealing the lower end portion of the outer bag 210 in the Y direction. Subsequently, the cold storage pack 100 is inserted into each of the four bag portions 211 so that the seal portion 123 of the cold storage pack 100 and the seal portion 213 of the outer bag 210 face each other. After the cold storage pack 100 is inserted into all four bag portions 211, the seal portion 214 is formed by sealing the upper end portion of the outer bag 210 in the Y direction as shown in FIG. 7.

Examples of the outer bag film 220 include a BNS (multilayer tube) film which is a laminated film of NY (nylon) / adhesive PE (polyethylene) / NY / adhesive PE / PE, and an EMMA (ethylene / methyl methacrylate copolymer resin) film. , PE / EVA (ethylene-vinyl acetate copolymer resin) / PE laminated film, EVA film can be used. Further, the same material as the above-mentioned cold storage pack film 125 constituting the cold storage pack 100 housed in the bag portion 211 may be used for the outer bag film 220. By using such a material for the outer bag 210, the connecting portion 212 of the outer bag 210 can be made bendable even at the solid phase of the cold storage material 110 as described above.

7 and 8 show a state in which the cold storage pack 100 is stored in the bag portion 211 so that the seal portion 123 of the cold storage pack 100 is located on the seal portion 213 side of the outer bag 210. The 100 may be stored in the bag portion 211 so that the seal portion 124 of the cold storage pack 100 is located on the seal portion 213 side of the outer bag 210.

According to the present embodiment, instead of connecting the plurality of cold storage packs 100 by providing connecting portions on both side portions L1 and L2 (see FIG. 1) of the cold storage pack 100 itself, each of the plurality of cold storage packs 100 is described above. The cold storage pack (cold storage device) 100 of the first embodiment remains independent of each other. Therefore, as in the case of the cold storage pack 100 of the first embodiment, when the cold storage material 110 is in a solid phase, the surface F1 having the backing portion 122 and the surface F2 facing the surface F1 (see FIG. 3B) are flat. Since it can be a high surface, the contact area with the cooling target can be increased by using the surface F1 or the surface F2 of each cold storage pack 100 as the contact surface with the cooling target. The cold storage pack 100 is housed in each of the plurality of bag portions 211 partitioned by the connecting portions 212 of the outer bag 210, so that, for example, as shown in an example of how to use the cold insulation tool 200 in FIG. In addition, the cooling device 200 can be brought into contact with the cooling object 11 having a curved surface (for example, the neck, head, legs, arms, shoulders, palms, etc. of the human body), and each of the cold storage packs 100 Can take a large contact area with the object to be cooled 11, so that the object 11 to be cooled can be cooled efficiently.

Further, as described above, by configuring the connecting portion 212 of the outer bag 210 so as to be bendable even when the cold storage material 110 is in a solid phase, the cooling object 11 is small even when it is small or thin. The connecting portion 212 can be bent in accordance with the smallness and thinness, and the cooling device 200 can be brought into contact with the cooling object 11 to be cooled.

Further, according to the present embodiment, even if the cold storage material 110 which has become a liquid phase leaks from the cold storage pack 100, the cold storage material leaks to the outside of the cold insulation tool 200 due to the presence of the outer bag 210. It is also possible to prevent the object 11 to be cooled from being contaminated. Therefore, when the purpose is to achieve such an effect, even when the cold storage device is configured by using one cold storage pack 100, the cold storage tool 200 is set to 1 in the outer bag 210 having one bag portion 211. It may be configured to store individual cold storage packs 100.

In the present embodiment, an example is shown in which the cold storage pack 100 and the outer bag 210 each have four bag portions 211, but the number of the cold storage pack 100 and the bag portion 211 may be one or more. It does not matter if there are more than one.

Next, the

cold storage tools

200A and 200B, which are modifications of the cold storage device 200 shown in FIG. 7, will be described with reference to FIGS. 10 and 11. In addition, an example of using the cold insulation device 200A will be described with reference to FIG. In FIGS. 10, 11, and 12 (a), the cooling object 12 is shown as a flat surface for simplification of the illustration, but in the

cooling devices

200A and 200B, the cooling object 12 is a curved surface. It is particularly preferably used when it has.

FIG. 10 is a diagram showing a cold storage device 200A which is a modification of the cold storage device 200 of the present embodiment.

As shown in FIG. 10, the cooler 200A is located between the cooler 200 shown in FIG. 7 and the cooler 200 (cold storage pack 100) and the cooling object 12 when the cooling object 12 is cooled. It is provided with a buffer layer 231 provided on the surface side of the refrigerating tool 200 facing the object 12 to be cooled. The buffer layer 231 has a flat structure without unevenness, and has flexibility that allows the cold storage material 110 to bend at a solid phase. The material constituting the buffer layer 231 is a material that does not freeze and has fluidity even when the cold storage material 110 (see FIG. 1 and the like) in the cold storage pack 100 is in a solid phase, that is, even in an environment where the cold storage material 110 is frozen. Any material may be used as long as it is used. Examples of the material constituting the buffer layer 231 include a material obtained by adding a thickener to an aqueous solution of sodium chloride having a mass percent concentration of 23%.

According to the cold insulation tool 200A, the presence of the buffer layer 231 in the portion of the outer bag 210 corresponding to the connection portion 212 enables the connection portion 212 to cool the object to be cooled 12. Further, the cooling efficiency can be improved by increasing the adhesion to the object to be cooled 12. Further, since the buffer layer 231 is flexible at the solid phase of the cold storage material 110, the buffer layer 231 is a cooling tool even for the cooling object 11 having a curved surface as shown in FIG. It can be bent together with 200, and the object to be cooled 11 can be cooled efficiently.

FIG. 11 is a diagram showing a cold storage device 200B which is another modification of the cold storage device 200 of the present embodiment.

As shown in FIG. 11, the cold insulator 200B includes the cold insulator 200 shown in FIG. 7 and a buffer layer 232 containing the cold insulator 200. The structure and constituent materials of the buffer layer 232 are the same as those of the buffer layer 231 in the cold insulation tool 200A shown in FIG. 10 except that the structure includes the cold insulation tool 200, and thus the description thereof will be omitted.

According to the cooling device 200B, the buffer layer 232 exists not only on the surface side of the cooling device 200 facing the cooling object 12 but also on the surface side of the cooling device 200 not facing the cooling object 12, so that FIG. The same effect as that of the buffer layer 231 in the cooling device 200A shown in the above can be obtained, and the cooling device 200 (cold storage pack 100) can be protected from an external impact.

Although FIGS. 10 and 11 show an example in which the surface of the cold storage pack 100 facing the back-attached portion 122 faces the cooling object 12, the back-attached surface of the cold storage pack 100 is attached. The surface with the portion 122 may be configured to face the cooling object 12.

12A and 12B are schematic views showing a usage example of the cold insulation tool 200A shown in FIG. 10, FIG. 12A is a schematic cross-sectional view for explaining the usage example, and FIG. 12B is the usage example. It is a figure which shows the specific example of.

As shown in FIG. 12A, in this use example, the cooling object 12 has the cooling device 200A having the cooling device 200 and the buffer layer 231 in contact with the cooling object (for example, the human body) 12. And the fixing jig 240 is wrapped around the cooling tool 200A to fix the cooling tool 200A.

Specifically, as shown in FIG. 12B, the cold insulation tool 200A can be used as a supporter by using the fixing jig 240, for example, when the leg is the object to be cooled 12. Here, the object to be cooled 12 is not limited to the legs, but may be the neck, head, arms, shoulders, palms, and the like.

In this usage example, it is also possible to use the cold storage device 200B shown in FIG. 11 instead of the cold storage device 200A.

[Third Embodiment]
The cold insulation device 300 of the third embodiment of the present invention will be described with reference to FIGS. 13 and 14. In addition, in FIGS. 13 and 14, the cold storage device (cold storage pack) 100 of the first embodiment described with reference to FIGS. 1 to 3 and the cold storage device of the second embodiment described with reference to FIGS. 7 to 12 The same components as those of 200 are designated by the same reference numerals, and duplicate description will be omitted as appropriate.

FIG. 13 is a schematic view showing the configuration of the cold insulation device 300 according to the third embodiment of the present invention. Further, FIG. 14 is a diagram showing one step of the manufacturing method of the cold insulation tool 300 shown in FIG.

As shown in FIG. 13, the cold storage device 300 of the third embodiment includes an outer bag 210 and 16 cold storage packs 100 shown in FIG. The outer bag 210 is formed in 16 bag portions 311 and 16 bag portions 311 arranged in a matrix of 4 rows and 4 columns in the X direction (second direction) and the Y direction (first direction). It has a connecting portion 212 for connecting the bag portions 311 adjacent to the X direction and a connecting portion 312 for connecting the bag portions 311 adjacent to the Y direction, and the 16 cold storage packs 100 have 16 bag portions. In each of the 311s, the backing portion 122 of the cold storage pack 100 is stored so that the extending direction coincides with the Y direction.

The cold storage pack 100 in the present embodiment has the same structure as the cold storage pack 100 in the first and second embodiments, but has a

seal portion

123 and 124 more than the cold storage pack 100 in the second embodiment. The ratio of the length of the backing portion 122 to the length is small. The length of the cold storage pack 100 in the Y direction in the present embodiment is 1/4 or less of the length of the outer bag 210 in the Y direction.

Also in this embodiment, the connecting portion 212 and the connecting portion 312 are the cold storage material 110 in the cold storage pack 100 (see FIG. 1 and the like), similarly to the connecting portion 212 of the outer bag 210 in the cold insulation tool 200 of the second embodiment. It is desirable that the product has flexibility that allows it to bend in the solid phase.

According to the refrigerating tool 300 of the present embodiment configured in this way, for example, it is possible to cool the object to be cooled by wrapping the object to be cooled having a spherical surface.

The cold insulation device 300 of the present embodiment is manufactured as follows. First, in the same manner as the manufacturing method of the cold insulation tool 200 of the second embodiment shown in FIGS. 8A to 8C, the tubular outer bag film 220, the four bag portions 211, and the connection portion The 212 and the seal portion 213 are formed. After that, as shown in FIG. 14, the cold storage pack 100 is inserted into each of the four bag portions 211 so that the seal portion 123 of the cold storage pack 100 and the seal portion 213 of the outer bag 210 face each other. Subsequently, the inner surfaces of the outer bag 210 at a position not overlapping with the seal portion 124 at the upper portion in the Y direction of the seal portions 124 of the four cold storage packs 100 arranged on the seal portion 213 of the outer bag 210 are placed in the X direction. The connecting portion 312 is formed by partially laminating them. As a result, of the bag portions 311 arranged in a matrix, the bottommost bag portion 311 in the Y direction is formed. By repeating this process and finally sealing the upper end portion of the outer bag 210 in the Y direction to form the sealing portion 214, the cold insulation tool 300 shown in FIG. 13 is completed.

In the present embodiment, an example is shown in which the cold storage pack 100 and the outer bag 210 each have 16 bag portions 311. However, the number of the cold storage pack 100 and the bag portion 311 may be any number that can be arranged in a matrix. Any number is acceptable.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the gist of the present invention, and these are also the present invention. Needless to say, it is included in the range.

For example, in the cold insulation tool 200 of the second embodiment, an example in which a buffer layer is provided is shown (see FIGS. 10 and 11), but the buffer layer is the cold insulation tool 100 and the third embodiment of the first embodiment. It can also be provided in the form of the cold insulation device 300.

Claims

A cold storage material whose volume in the solid phase is smaller than that in the liquid phase,
A tubular portion provided with a backing portion extending in a first direction extending between the inner surfaces of both end portions of the film and filled with the cold storage material, and the first direction in which both end portions of the tubular portion are sealed. A packaging bag having first and second seals extending in a second direction intersecting with
A cold storage device characterized by having at least one cold storage pack containing.
The cold insulation device according to claim 1, wherein the back-pasting portion is provided so as to intersect at substantially the center of each of the first and second seal portions.
The cold insulation device according to claim 1 or 2, wherein the length of the backing portion is longer than the length of the first and second sealing portions.
The at least one cold storage pack is a plurality of cold storage packs.
Further, an outer bag having a plurality of bag portions arranged side by side in the second direction and a connecting portion for connecting adjacent bag portions in the plurality of bag portions is further provided.
The cold storage device according to any one of claims 1 to 3, wherein the plurality of cold storage packs are housed in each of the plurality of bag portions of the outer bag.
The at least one cold storage pack is a plurality of cold storage packs.
An outer bag having a plurality of bag portions arranged in a matrix in the first and second directions and a connecting portion for connecting adjacent bag portions in the plurality of bag portions is further provided.
The cold storage device according to any one of claims 1 to 3, wherein the plurality of cold storage packs are housed in each of the plurality of bag portions of the outer bag.
The cold storage device according to claim 4 or 5, wherein the connection portion has flexibility when the cold storage material is in a solid phase.
Claims 1 to 6, further comprising a buffer layer provided at least on the surface side of the cold storage pack facing the cooling target so as to be located between the cold storage pack and the cooling target. The cold storage device described in any one of the items.
The cold storage device according to claim 7, wherein the buffer layer contains the cold storage pack.
The cold storage device according to claim 7 or 8, wherein the buffer layer has flexibility in an environment in which the cold storage material changes phase from a liquid phase to a solid phase.