JP2023025332A - container - Google Patents

Abstract

To provide a container which can achieve both of suppression of heat release of a cold insulator into the container per unit time, and weight saving of the container, and suppress excessive cooling on a lower part of the content.SOLUTION: A container comprises: an inner container 5 and an outer container 2 which are connected in a state of being arranged at inside/outside; a bottomed cylindrical storage space part 6a formed between the inner and outer containers; a cold insulator 6 stored in the storage space part; and an independent foam heat insulation layer 7. The heat insulation layer comprises: a cylindrical heat insulation layer wall 71 covering a lower part of an outer peripheral face of an inner peripheral wall 51 of the inner container; and a heat insulation layer bottom 72 covering a bottom face of an inner bottom wall 52 of the inner container. The outer peripheral face of the inner peripheral wall has: a heat insulation region covered with the heat insulation layer wall; and a heat release region exposed to the cold insulator. The heat release region has a cylindrical main heat release region arranged on an upper side of the heat insulation layer wall, and a content is cooled in the upper main heat release region, and the content is hot insulated in the lower heat insulation region.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a container containing a cooling agent.

As an example of a conventional container containing a cooling agent, the cooling agent and the heat insulating layer are accommodated between the inner container and the outer container, and the inner container, the cooling agent, the heat insulating layer, and the outer container are arranged in this order toward the outside in the radial direction. are known (Patent Documents 1 and 2).

In the above-described conventional container containing a cold insulator, the cold insulator is arranged so as to cover almost the entire outer peripheral surface of the inner container, so that the heat of the cold insulator is efficiently transmitted to the inner container. The heat insulating layer is arranged to cover almost the entire inner peripheral surface of the outer container, and the heat insulating layer is arranged to cover the outside of the cold insulating agent, so it plays a role in making it difficult for the heat of the cold insulating agent to be transmitted to the outer container. there is

Japanese Patent Application Laid-Open No. 2020-73150 Japanese Patent Application Laid-Open No. 2005-103020

By the way, when a cold beverage is to be drunk, for example, using the conventional container containing the ice pack, it is necessary to put the container in a freezer in advance to cool the container together with the ice pack. When the beverage is poured into the container taken out of the freezer, the heat of the cooling agent is efficiently transferred from the inner container to the beverage, making it suitable for rapidly cooling the beverage. be. Further, when the temperature is too cold, it means that the cooling agent releases too much heat to the beverage in the container in a short period of time. As a result, for example, when the beverage is poured into the same container multiple times, the time it takes for the beverage to cool to the desired temperature is longer than the desired time, or the beverage does not cool to the desired temperature after the second time. can happen.

Further, when a beverage is chilled in a conventional container containing a cooling agent, the temperature of the beverage in the container is lower on the lower side than on the upper side. This is because in a conventional container containing a cooling agent, the cooling agent is arranged in a state that covers almost the entire outer peripheral surface of the inner container, and heat (cooling) is released to the beverage from almost the entire length of the inner container in the height direction. Immediately after the beverage is poured into the container, the lower portion of the beverage becomes colder than the upper portion, and in some cases, only the lower portion may freeze.

In addition, there is a demand for weight reduction of conventional containers containing cooling agents. As a means of achieving this demand, for example, forming a narrow space between the inner container and the outer container and forming a container in which the amount of cooling agent is reduced by the amount of narrowing of the space is conceivable. It is true that the weight of the container can be reduced, but as the amount of cooling agent decreases, not only does the heat lasting power decrease, but the cooling agent covers almost the entire outer peripheral surface of the inner container. Therefore, the situation where the cooling agent releases too much heat in a short time cannot be improved.

The present invention was created in consideration of the above-mentioned circumstances, and its object is to suppress the amount of heat released per unit time of the cooling agent into the container and to reduce the weight of the container. It is important not to overdo it.

The container of the present invention includes an inner container and an outer container that are connected in a state of being arranged inside and outside, a bottomed cylindrical storage space formed between the inner container and the outer container, and a container that is stored in the storage space. and a heat insulating layer of closed foam. The heat insulating layer includes a cylindrical heat insulating layer wall that covers the lower part of the outer peripheral surface of the inner peripheral wall of the inner container, and a heat insulating layer bottom that covers the bottom surface of the inner bottom wall of the inner container. In addition, the outer peripheral surface of the inner peripheral wall is provided with a heat insulating area covered with the heat insulating layer wall and a heat radiating area exposed to the cooling agent, and the heat radiating area is provided with a cylindrical main heat radiating area arranged above the heat insulating layer wall. to

It does not matter whether or not the cold insulating agent surrounds the outer peripheral surface of the heat insulating layer wall, but the following is desirable to maintain the cold insulating effect.
In other words, the cold insulator surrounds the main heat radiation area of the inner peripheral wall and the outer peripheral surface of the heat insulating layer wall in a vertically continuous state.

It does not matter how high the upper end of the heat insulating layer wall is with respect to the total height of the cylindrical space, but specifically, it is desirable to have the following.
That is, the upper end of the heat insulating layer wall is arranged at a height of 3/4 or less of the total height of the cylindrical space.
Also, the upper end of the heat insulating layer wall is arranged at a height of 1/4 or more of the total height of the cylindrical space.

In the container of the present invention, not only the bottom surface of the inner bottom wall of the inner container is covered with the heat insulating layer bottom and serves as a heat insulating area, but also the lower portion of the inner peripheral wall of the inner container is covered with the heat insulating layer wall and serves as a heat insulating area. Since the upper side of the adiabatic area is the main heat dissipation area, the contents are cooled in the upper part and kept warm in the lower part, which is much better than conventional containers in which the contents are cooled from almost the entire height of the inner container. The lower part of the contents is cooled at a slower rate, preventing the lower part of the contents from being too cold. Further, the container of the present invention has a portion covered with the heat insulating layer bottom on the bottom surface of the inner bottom wall of the inner container, and a portion covered with the heat insulating layer wall and the cooling agent on the outer peripheral surface of the inner peripheral wall of the inner container. As compared with a container in which almost the entire outer surface of the inner container is exposed to the cooling agent, for example, the amount of heat released by the cooling agent per unit time is suppressed and the weight of the container is reduced.

Further, in the container of the present invention, in the case where the cooling agent surrounds the main heat radiation area of the inner peripheral wall and the outer peripheral surface of the heat insulating layer wall in a continuous state in the vertical direction, it is accommodated in the portion surrounding the heat insulating layer wall. Since the heat insulation layer wall obstructs the heat dissipation in the shortest distance from the cooling agent to the inner peripheral wall, the heat from the cooling agent accommodated in the portion surrounding the insulating layer wall passes through the cooling agent accommodated above it, and reaches the inside. It will be transmitted to the surrounding wall and contents in order, and the cold insulation effect will last.

It is a front view which shows the container of 1st embodiment of this invention. It is sectional drawing which decompose|disassembles and shows the container of 1st embodiment.

1 and 2, the container 1 of the first embodiment of the present invention comprises an outer container 2, an inner container 5 housed inside the outer container 2 and connected to the outer container 2, the outer container 2 and the contents. A cold insulator 6 accommodated between the containers 5, a heat insulating layer 7 accommodated between the outer container 2 and the inner container 5 and covering the outer surface of the inner container 5 at the bottom, and the outer container 2 above the cold insulator 6. and a packing 8 sandwiched between the inner container 5. In addition, it is desirable that the container 1 of this embodiment is for liquids (for beverages).

The outer container 2 has a double-walled structure arranged outside the inner container 5 and has a hollow space between the two walls. The outer container 2 is arranged between the outer container 3 and the outer container 3 and the inner container 5 (that is, arranged inside the outer container 3 and outside the inner container 5). It is a structure in which an intermediate container 4 is provided and the outer container 3 and the intermediate container 4 are connected in a state in which the intermediate container 4 is accommodated inside the outer container 3 .

Both the outer container 3 and the intermediate container 4 are made of processed metal plates (made of metal) and have elasticity. The outer container 3 also includes a vertically extending cylindrical outer peripheral wall 31 and an outer bottom wall 32 closing the lower end of the outer peripheral wall 31 . The intermediate container 4 includes a cylindrical intermediate peripheral wall 41 extending in the vertical direction and concentrically arranged radially inwardly of the outer peripheral wall 31 , and an intermediate bottom wall 42 closing the lower end of the intermediate peripheral wall 41 . In addition, the cylindrical shape and the radial direction specifically refer to the cylindrical shape and the radial direction, and the same applies hereinafter.

The outer bottom wall 32 has a bottom recessed portion 32a recessed upward with respect to its periphery at its central portion. The bottom recessed portion 32a is hemispherical.

Both the outer peripheral wall 31 and the intermediate peripheral wall 41 are shaped such that their diameters become smaller as they go downward. Further, the outer peripheral wall 31 and the intermediate peripheral wall 41 have overlapping portions 2b radially overlapping each other at their upper ends, and have space portions 2a radially separated from each other below the overlapping portions 2b. That is, a space portion 2a is formed inside the outer container 2 .

Since the outer peripheral wall 31 and the intermediate peripheral wall 41 are separated from each other in the radial direction below their upper end portions, and the outer bottom wall 32 and the intermediate bottom wall 42 are separated from each other in the vertical direction, the space 2a is a cylinder with a bottom. It is formed in the shape of a cylinder with a bottom. The space 2a is formed in a negative pressure, in other words, in a vacuum state, and functions as a heat insulating space.

The overlapped portion 2b is integrated by welding, and the upper end portions of the outer peripheral wall 31 and the intermediate peripheral wall 41 are integrated over the entire circumference. That is, the overlapped portions 2b overlap in the radial direction. It is the upper end. Details of the intermediate peripheral wall 41 and the outer peripheral wall 31 will be described later.

The inner container 5 has a structure having a single wall, is made by processing a metal plate (made of metal), and has elasticity. The inner container 5 includes a cylindrical inner peripheral wall 51 extending in the vertical direction, an inner bottom wall 52 closing the lower end of the inner peripheral wall 51, and an outer wall extending downward while protruding radially outward from the entire circumference of the upper end of the inner peripheral wall 51. A mouth wall 53 is provided.

The inner container 5 and the outer container 2 are provided with a connecting portion 1a that connects them at their upper portions. The connecting portion 1a is formed by a fitting portion 5c and a fitted portion 2c that fit together. The fitting portion 5 c is the upper portion of the inner container 5 , and the fitted portion 2 c is the upper portion of the outer container 2 .

The inner peripheral wall 51 includes an inner wall 51a positioned radially inward of the outer wall 53 and extending downward from the entire circumference of the upper end of the outer wall 53, and an outward convex formed downward from the lower end of the inner wall 51a. The portion 51b has a cylindrical inner peripheral wall main body 51c extending downward from the entire circumference of the lower end of the outward convex portion 51b. In addition, the inner peripheral wall main body 51c has a cylindrical shape whose diameter decreases as it goes downward as a whole.

The outer wall 53, the inner wall 51a, and the outward convex portion 51b form the upper portion of the inner container 5, that is, the fitting portion 5c. The fitting portion 5c is fitted to the upper portion of the outer container 2 (to-be-fitted portion 2c) with the packing 8 accommodated therein.

The packing 8 is elastically deformable, for example, made of rubber. The packing 8 has an annular shape, and has a slit 8a extending upward in the center of the width in the radial direction on the lower surface of the packing 8 over the entire circumference. The radial width of the slit 8a is slightly narrower than the radial width of the overlapping portion 2b.

The fitting portion 5c is annular, and its cross-sectional shape (more specifically, the cross-sectional shape on one side when cut in the vertical direction) is U-shaped opening downward. Inside the fitting portion 5c, the upper portion of the outer container 2 is accommodated in the lower portion thereof, and the packing 8 is accommodated in the intermediate portion (above the upper portion of the outer container 2) in a state of being sandwiched from the inside and outside in the radial direction. An upper space portion 8s is formed in the upper portion (above the packing 8).

The outward protrusion 51b extends downward from the entire circumference of the lower end of the inner wall 51a and protrudes radially outward, and has an outwardly protruding V-shaped cross section. The outward convex portion 51b faces the outer wall 53 in the radial direction. is also located above.

The fitted portion 2c is fitted to the fitting portion 5c. The fitted portion 2 c is formed by the upper portion of the intermediate peripheral wall 41 and the upper portion of the outer peripheral wall 31 .

The outer peripheral wall 31 includes an outer overlapped portion 31a which is an upper end portion of the outer peripheral wall 31, an annular upper stepped portion 31b projecting radially outward over the entire circumference below the outer overlapped portion 31a, and an annular upper stepped portion 31b extending downward from the entire outer circumference of the upper stepped portion 31b. A base portion 31c that extends and overlaps in a plane on the radially inner side of the outer wall 53 of the inner container 5; an outer peripheral wall main body 31e extending downwardly from the entire perimeter of the outer periphery. The upper portion of the outer peripheral wall 31 forming the fitted portion 2c is the portion above the outer peripheral wall main body 31e, that is, the outer overlapping portion 31a, the upper stepped portion 31b, the base portion 31c, and the lower stepped portion 31d.

The intermediate peripheral wall 41 has an inner overlapping portion 41a which is an upper end portion thereof, an inwardly projecting portion 41b that protrudes radially inward along the entire circumference below the overlapping portion 2b, and an inwardly projecting portion 41b that is fitted to the upper side of the outwardly projecting portion 51b. A tubular intermediate peripheral wall main body 41c extending downward from the entire circumference of the lower end of the portion 41b is provided. The upper portion of the intermediate peripheral wall 41 that forms the fitted portion 2c is the portion above the intermediate peripheral wall main body 41c, that is, the inner overlapping portion 41a and the inward convex portion 41b.

The inward convex portion 41b has a V-shaped cross section that protrudes inward. In addition, the inward convex portion 41b faces the base portion 31c in the radial direction. To position. Similarly, the radially innermost portion of the V-shaped cross-sectional shape is located above the lower end of the outer wall 53 that overlaps the base portion 31c.

The inner container 5 and the outer container 2 are connected by fitting the fitting portion 5c into the fitted portion 2c in such a state that the upward movement thereof is restricted. A housing space 6 a is formed between the inner container 5 and the outer container 2 . Since the inner peripheral wall main body 51c and the intermediate peripheral wall main body 41c are separated from each other in the radial direction, and the inner bottom wall 52 and the intermediate bottom wall 42 are separated from each other in the vertical direction, the housing space 6a has a cylindrical shape with a bottom, that is, a bottomed one. It is formed in a cylindrical shape. That is, the accommodation space 6a includes a cylindrical space 6b formed between the inner peripheral wall main body 51c and the intermediate peripheral wall main body 41c separated in the radial direction, and an inner bottom communicating with the lower end of the cylindrical space 6b and separated in the vertical direction. A bottom plate-shaped space portion 6 c is formed between the wall 52 and the intermediate bottom wall 42 . The cooling agent 6 and the heat insulating layer 7 are accommodated in the accommodation space 6a.

The refrigerant 6 is, for example, liquid (having the property of freezing or thawing in the range of -20°C to -5°C). As a more specific example, the cooling agent 6 contains urea, water, and polypropylene glycol.

Water occupies most of the cooling agent 6 .
Urea and polypropylene glycol make water easy to freeze.
Considering the expansion in the frozen state, the filling amount of the refrigerant 6 is determined by the inward convex portion 41b and the outward convex portion 51b with respect to the accommodation space portion 6a formed between the inner container 5 and the outer container 2. up to a little lower than the part where the is fitted.

The heat insulating layer 7 includes a heat insulating layer wall 71 that covers the lower part of the outer peripheral surface of the inner container 5 (the outer peripheral surface of the inner peripheral wall 51) and a heat insulating layer bottom 72 that covers the bottom surface of the inner container 5 (the bottom surface of the inner bottom wall 52). and

The heat insulating layer wall 71 covers the lower portion of the outer peripheral surface of the inner container 5 over the entire length in the circumferential direction. In this embodiment, the heat insulation layer wall 71 is formed by winding a heat insulation sheet having no through holes into a cylindrical shape. The lower part of the outer peripheral surface of the inner peripheral wall 51 is the heat insulating region covered by the heat insulating layer 7 (heat insulating layer wall 71), while the heat radiation exposed to the cold insulator 6 is not covered by the heat insulating layer 7. The region is the outer peripheral surface of the inner peripheral wall 51 above the heat insulating layer wall 71 .
Further, in this embodiment, the upper end of the heat insulating layer wall 71 is arranged at a height approximately half the total height H of the cylindrical space portion 6b. Therefore, the upper end of the heat insulating layer wall 71 is arranged at a height of 3/4 or less of the total height H of the cylindrical space portion 6b, and at a height of 1/4 or more of the total height H of the cylindrical space portion 6b. The lower end when measuring the total height H of the cylindrical space portion 6b is the lowest end of the inner container 5 (the lowest end of the inner bottom wall 52). The upper end of the heat insulating layer wall 71 is adjusted in a height range of 3/4 or less and 1/4 or more of the total height H according to the actual cooling condition.

Also, the heat insulating layer bottom 72 is formed of a heat insulating sheet without through holes. The inner bottom wall 52 of the inner container 5 is a heat insulating region covered with the heat insulating layer 7 (heat insulating layer bottom 72). Therefore, in this embodiment, the heat radiation area exposed to the cold insulator 6 is composed only of the cylindrical main heat radiation area located above the heat insulating layer wall 71 .
The heat insulating sheet of the heat insulating layer bottom 72 and the heat insulating sheet of the heat insulating layer wall 71 are made of the same material in this embodiment. The heat insulating sheet forming the heat insulating layer 7 has a seamless integral shape in the drawing, that is, a cylindrical shape with a bottom. Further, the heat insulating sheet may be adhered to the inner container 5 with an adhesive, or simply covered on the outer peripheral surface of the inner container 5 without being adhered so as to be detachable.

The heat-insulating sheet (heat-insulating layer 7 ) has a weight per unit volume smaller than that of the cooling agent 6 . The heat insulating sheet is a closed-cell foam (closed-cell foamed rubber or foamed resin). Closed foams are less likely to absorb water than open foams, so when used under the condition that they are in contact with the cooling agent 6, they have a large heat insulating effect. In addition, the independent foam can reduce the weight per unit volume and improve the flexibility as compared with rubber or resin that does not contain a foaming agent.

The container 1 of the first embodiment of the present invention has only the portion covered with the heat insulating layer bottom 72 of the heat insulating layer 7 on the bottom surface of the outer surface of the inner container 5, but the outer surface of the outer surface of the inner container 5 ( Since the outer peripheral surface of the inner peripheral wall 51) has a portion covered with the heat insulating layer 7 and a portion exposed to the cooling agent 6 (a portion soaked), for example, the outer surface (outer peripheral surface and bottom surface) of the inner container 5 is almost Compared with a container having a portion whose entire surface is exposed to the cooling agent 6, the amount of heat released by the cooling agent 6 per unit time is suppressed and the weight of the container 1 is reduced.

In addition, since the container 1 of the first embodiment of the present invention uses a heat insulating sheet as the heat insulating layer 7 in the lower part of the inner container 5, the heat insulating layer 7 covers the outer surface of the inner container 5 according to the total area. It is possible to suppress the amount of heat released by 6 per unit time, prevent the cooling agent 6 from releasing too much heat in a short time, and the liquid in the container 1 to cool down too much. The weight of the container 1 can be reduced.

Further, in the container 1 of the first embodiment, not only is the bottom surface of the inner bottom wall 62 of the inner container 5 a heat insulating region covered with the heat insulating layer bottom 72, but also the lower portion of the inner peripheral wall 51 of the inner container 5 is a heat insulating layer wall. The upper side of the heat insulating area of the inner peripheral wall 51 becomes the main heat radiating area, and the contents are cooled on the upper side and kept warm on the lower side. Compared to conventional containers that cool from nearly the entire length of the direction, the cooling rate of the lower portion of the contents is slowed to prevent the lower portion of the contents from cooling too much.

Further, in the container 1 of the first embodiment, the cold insulator 6 surrounds the main heat radiation area of the inner peripheral wall 51 and the outer peripheral surface of the heat insulating layer wall 71 in a vertically continuous state, and also surrounds the bottom surface of the inner bottom wall 52. Therefore, the heat insulation layer wall 71 prevents heat dissipation in the shortest distance from the refrigerant 6 contained in the portion surrounding the heat insulation layer wall 71 to the inner peripheral wall 51, and the heat insulation layer wall 71 is contained in the portion surrounding the heat insulation layer bottom 72. Since heat insulation layer bottom 72 prevents heat dissipation in the shortest distance from cooling agent 6 to inner bottom wall 52, heat from cooling agent 6 accommodated in the portion surrounding insulation layer wall 71 and insulation layer bottom 72 is dissipated. Through the cold insulator 6 accommodated on the upper side of the heat insulating layer wall 71, the cold is transmitted to the inner peripheral wall 51 and the contents in order, so that the cold insulating effect is maintained.

The present invention is not limited to the above embodiments. For example, the heat insulating sheet used as the heat insulating layer wall 71 does not have a through hole in the above-described embodiment, and therefore the heat radiation area is composed only of the main heat radiation area above the heat insulating layer wall 71. The present invention is not limited to this. For example, the heat insulating sheet used as the heat insulating layer wall 71 may be formed with through holes. In addition, it also includes a secondary heat radiation area exposed to the cold insulator 6 through the through holes formed in the heat insulating layer wall 71 .
In the above-described embodiment, the outer container 2 has a double-walled structure in which the space 2a is vacuumed.
In the above-described embodiment, the heat insulating layer 7 has a bottomed cylindrical shape in which the heat insulating layer wall 71 and the heat insulating layer bottom 72 are seamless, but the present invention is not limited to this. It is good as a form.

Reference Signs List 1 container 1a connecting portion 2 outer container 2a space portion 2b overlapping portion 2c fitted portion 3 outer container 31 outer peripheral wall 31a outer overlapping portion 31b upper step portion 31c base portion 31d lower step portion 31e outer peripheral wall main body 32 outer bottom wall 32a bottom concave portion 4 Intermediate container 41 Intermediate peripheral wall 41a Internal overlapping portion 41b Inward protrusion 41c Intermediate peripheral wall body 42 Intermediate bottom wall 5 Inner container 5c Fitting portion 51 Inner peripheral wall 51a Inner mouth wall 51b Outward protrusion 51c Inner peripheral wall body 52 Inner bottom wall 53 Outer mouth Wall 6 Coolant 6a Storage space 6b Cylindrical space 6c Bottom plate-shaped space 7 Thermal insulation layer 71 Thermal insulation layer wall 72 Thermal insulation layer bottom 8 Packing 8a Slit 8s Upper space H Overall height

Claims (4)

An inner container and an outer container that are connected in a state of being arranged inside and outside, a cylindrical storage space with a bottom formed between the inner container and the outer container, and a cooling agent and independent foam stored in the storage space Equipped with a thermal insulation layer of the body and
The heat insulating layer includes a cylindrical heat insulating layer wall covering the lower part of the outer peripheral surface of the inner peripheral wall of the inner container, and a heat insulating layer bottom covering the bottom surface of the inner bottom wall of the inner container,
The outer peripheral surface of the inner peripheral wall has a heat insulating region covered with the heat insulating layer wall and a heat radiating region exposed to the cooling agent,
A container, wherein the heat-dissipating area comprises a tubular main heat-dissipating area located above an insulating layer wall. 2. The container according to claim 1, wherein the cooling agent surrounds the main heat radiation area of the inner peripheral wall and the outer peripheral surface of the heat insulating layer wall in a vertically continuous state. 3. The container according to claim 1, wherein the upper end of the heat insulating layer wall is arranged at a height of 3/4 or less of the total height of the cylindrical space. 4. The container according to claim 3, wherein the upper end of the heat insulating layer wall is arranged at a height of 1/4 or more of the total height of the cylindrical space.

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