JP2022080332A - Insulation container, outer container, and inner container - Google Patents

Abstract

To provide a heat insulation container with a simple configuration capable of heat-insulating an object for a long time.SOLUTION: In a heat insulation container 100, an inner container 2 is stored in an outer container 1 so as to make a distance between the opening of the outer container 1 and the opening of the inner container 2 longer. Thus, in the heat insulation container 100, a path for conducting external heat from the opening of the outer container 1 to the opening of the inner container 2 becomes longer. In other words, in the heat insulation container 100, as the path for conducting the external heat into the inner container 2 is longer, adiabaticity is improved. Thus, in the heat insulation container 100, an object stored in the inner container 2 in the heat-insulated manner can be maintained at a fixed temperature for a long time.SELECTED DRAWING: Figure 1

Description

The present invention relates to a technique for a heat insulating container.

There is a demand for a heat insulating container for storing a heat insulating object and keeping the constant temperature for a long time. For example, with the progress of regenerative medicine technology, there is a demand for a technique for keeping a biological sample such as a cell or a tissue cold at a low temperature and transporting the biological sample while keeping the low temperature. In Patent Document 1, the biological sample is stored in a low-temperature container cooled by liquid nitrogen supplied from a liquid nitrogen server to keep the biological sample cold, and the biological sample is transported by transporting the low-temperature container. , There is a disclosure about the technology of transporting while keeping the low temperature.

Japanese Unexamined Patent Publication No. 2001-141346

However, in the above-mentioned prior art, since liquid nitrogen is used to keep the heat-retaining object cold at a low temperature, a liquid nitrogen server is required, and a configuration in which liquid nitrogen is held in a heat-retaining container for storing the heat-retaining object is required. Therefore, the heat insulating container becomes complicated and large.

Therefore, in view of the above problems, it is an object of the present invention to realize a heat insulating container having a simple structure and capable of keeping the heat insulating object warm for a long period of time.

The first invention is
An outer container having a bottomed cylindrical outer container body having a first opening, and an outer container lid for closing the first opening.
An inner container for storing a heat-retaining object, which can be stored in the outer container, has a bottomed cylindrical inner container body having a second opening, and an inner container lid that closes the second opening. The inner container provided with
Equipped with
The inner container is
In the state of being stored in the outer container, the distance between the first opening and the second opening is arranged to be longer than the distance between the first opening and the bottom of the inner container. ,
It is a heat insulating container.

In this heat insulating container, the distance between the first opening of the outer container and the second opening of the inner container is arranged to be longer than the distance between the first opening and the bottom of the inner container. The distance between the first opening of the container and the second opening of the inner container is long. Therefore, in this heat insulating container, the path through which the external heat is conducted from the first opening of the outer container to the second opening of the inner container becomes long. That is, in this heat insulating container, the heat transfer path through which the external heat is transferred to the inside of the inner container becomes long, so that the heat insulating property is improved. As a result, in this heat insulating container, the heat insulating object stored in the inner container can be kept at a constant temperature for a long period of time.

The second invention is the first invention.
With more heat storage material,
The heat storage material is arranged at a position between the inner container lid and the inner wall portion of the outer container body.

As a result, in this heat insulating container, the heat storage material accumulates heat from the outside as latent heat, so that the heat insulating effect can be further enhanced.

The third invention is the second invention.
With more insulation,
The heat insulating material is arranged inside the outer container and is arranged so as to surround the inner container and the heat storage material.

As a result, in this heat insulating container, the heat insulating material makes it difficult for heat from the outside to be conducted to the inside, so that the heat insulating effect can be further enhanced.

The fourth invention is any one of the first to third inventions.
The inner container contains a heat storage material for the inner container.

Thereby, in this heat insulating container, the heat insulating effect (the effect of keeping the temperature constant) in the inner container can be enhanced. For example, by forming the heat storage material for the inner container with a substance whose inner container heat storage material is near the target temperature of the heat insulating object, heat from the outside can be stored as latent heat of the inner container heat storage material, and as a result. , The heat retention effect (effect of keeping the temperature constant) in the inner container can be enhanced.

The fifth invention is any one of the second to fourth inventions.
The inner container includes a heat insulating material for the inner container in the inner container lid.

Thereby, in this heat insulating container, it is possible to prevent the heat from being excessively conducted from the inside of the inner container to the outside of the inner container, and as a result, it is possible to prolong the period for keeping the temperature inside the inner container constant.

The sixth invention is the fifth invention.
The heat storage material is composed of a substance whose solid-liquid phase change temperature of the heat storage material is different from the solid-liquid phase change temperature of the heat storage material for the inner container contained in the inner container.

As a result, in this heat insulating container, the heat insulating effect inside the inner container can be enhanced, and the heat insulating effect against heat from the outside can be enhanced.

The seventh invention is
An outer container used for the heat insulating container according to any one of the first to sixth inventions.
A bottomed cylindrical outer container body having a first opening,
The outer container lid that closes the first opening, and
The heat insulating material disposed inside the outer container body and
It is an outer container provided with.

Thereby, the outer container used for the heat insulating container according to any one of the first to sixth inventions can be realized.

The eighth invention is
An inner container used for the heat insulating container according to any one of the first to sixth inventions.
A bottomed cylindrical inner container body with a second opening,
The inner container lid that closes the second opening, and
A heat storage material for the inner container, which is composed of a substance having a solid-liquid phase change temperature near the target temperature for heat retention,
It is an inner container provided with.

Thereby, the inner container used for the heat insulating container according to any one of the first to sixth inventions can be realized.

According to the present invention, it is possible to realize a heat insulating container having a simple structure and capable of keeping a heat insulating object warm for a long period of time.

The vertical sectional view of the heat insulation container 100 which concerns on 1st Embodiment. The vertical sectional view of the inner container 2 which concerns on 1st Embodiment. The figure for demonstrating the use method (manufacturing method) of the inner container 2. The figure for demonstrating the use method (manufacturing method) of the inner container 2. The figure for demonstrating the use method (manufacturing method) of the inner container 2. The figure for demonstrating the use method (manufacturing method) of the inner container 2. The figure for demonstrating the use method (manufacturing method) of the heat insulation container 100. The figure for demonstrating the use method (manufacturing method) of the heat insulation container 100. The figure for demonstrating the use method (manufacturing method) of the heat insulation container 100. The figure for demonstrating the use method (manufacturing method) of the heat insulation container 100. The figure for demonstrating the use method (manufacturing method) of the heat insulation container 100. The figure for demonstrating the use method (manufacturing method) of the heat insulation container 100. The vertical cross-sectional view of the heat insulating container 100 when the inner container 2 is stored in the heat insulating container 100 in an upright state is a diagram schematically showing a path in which heat from the outside is transmitted into the inner container 2. The vertical sectional view of the heat insulating container 100 (the inner container 2 is in an inverted state) according to the first embodiment schematically shows the path through which heat from the outside is transferred to the inside of the inner container 2.

[First Embodiment]
The first embodiment will be described below with reference to the drawings.

FIG. 1 is a vertical sectional view of the heat insulating container 100 according to the first embodiment.

FIG. 2 is a vertical sectional view of the inner container 2 according to the first embodiment.

Further, as shown in FIGS. 1 and 2, the x-axis, y-axis, and z-axis are set.

<1.1: Configuration of heat insulating container>
As shown in FIG. 1, the heat insulating container 100 includes an outer container 1, an inner container 2, a first heat insulating material 3A, a second heat insulating material 3B, and a heat storage material 4.

(1.1.1: Outer container)
The outer container 1 includes an outer container main body 11 and an outer container lid 12.

The outer container main body 11 has a bottomed cylindrical shape (for example, as shown in FIG. 1, a vertically long cylindrical shape with the central axis as the axis C), and has an opening upward in an upright state. have. The outer container main body 11 preferably has a vacuum heat insulating structure in which a metal plate such as stainless steel is formed into a vacuum double structure. The opening of the outer container main body 11 is airtightly closed by the outer container lid body 12, so that the space inside the outer container main body 11 can be sealed.

As shown in FIG. 1, inside the outer container main body 11, the first heat insulating material 3A is arranged inside the bottom of the outer container main body 11 and along the inner wall of the side wall portion, and the second heat insulating material 3B is outside. It is arranged near the opening of the container body 11. Then, the heat storage material 4 and the inner container 2 are arranged (stored) inside the first heat insulating material 3A inside the outer container main body 11. That is, inside the outer container main body 11, the first heat insulating material 3A and the second heat insulating material 3B are arranged so as to surround the heat storage material 4 and the inner container 2.

The first heat insulating material 3A and the second heat insulating material 3B are, for example, solid heat insulating materials, and are preferably realized by a substance having a low thermal conductivity. The first heat insulating material 3A and the second heat insulating material 3B are realized by using, for example, foamed polyethylene.

As shown in FIG. 1, the first heat insulating material 3A and the second heat insulating material 3B are arranged so as to surround the heat storage material 4 and the inner container 2, and are cushioning materials so that the positions of the inner container 2 are not significantly displaced. Also works as. For example, when the heat insulating container 100 is transported, even if it receives an impact from the outside, the position of the inner container 2 may receive an impact from the outside due to the first heat insulating material 3A and the second heat insulating material 3B. , The position is prevented from being greatly displaced. That is, the first heat insulating material 3A and the second heat insulating material 3B realize the heat insulating function and the position fixing function of the inner container 2.

The outer container lid 12 is a lid (plug) for airtightly closing the opening of the outer container main body 11 and keeping the space inside the outer container main body 11 in a sealed state. For example, a screw thread is provided on the inner wall portion of the outer container lid body 12, and a screw groove screwed with the screw thread is provided near the opening of the outer container main body 11. Then, by screwing a screw thread on the inner wall portion of the outer container lid 12 into a screw groove near the opening of the outer container main body 11, the outer container lid 12 makes the opening of the outer container main body 11 airtight. It is closed and the space inside the outer container body 11 is sealed. A screw groove may be provided on the inner wall portion of the outer container lid 12, and a screw thread to be screwed with the screw groove may be provided in the vicinity of the opening of the outer container main body 11.

As shown in FIG. 1, the heat storage material 4 is arranged on the first heat insulating material 3A arranged at the bottom of the outer container main body 11. The heat storage material 4 is realized by using, for example, a substance (for example, ice) having a solid-liquid phase change temperature (for example, a melting point) lower than the heat retention target temperature. Further, as shown in FIG. 1, the inner container 2 is arranged on the heat storage material 4 in an inverted state. The "heat-retaining target temperature" is a target temperature at which the heat-retaining object is kept warm, and when the purpose is to keep the heat-retaining object at a constant temperature x ° C, the temperature x ° C corresponds to this.

(1.1.2: Inner container)
The inner container 2 includes an inner container main body 21 and an inner container lid 22. As shown in FIG. 1, the inner container 2 is arranged in an inverted state on the heat storage material 4 inside the upright outer container 1.

The inner container main body 21 has a bottomed cylindrical shape (for example, as shown in FIG. 2, a vertically long cylindrical shape with the central axis as the axis C1), and has an opening upward in an upright state. have. The inner container main body 21 preferably has a vacuum heat insulating structure in which a metal plate such as stainless steel is formed into a vacuum double structure. The opening of the inner container body 21 is airtightly closed by the inner container lid 22, so that the space inside the inner container body 21 can be sealed.

As shown in FIGS. 1 and 2, inside the inner container main body 21, the heat storage material 23 for the inner container is arranged inside the inner container main body 21 along the side wall portion of the inner container main body 21. Then, a container 5 for a heat insulating object, which is a container for storing a heat insulating object (for example, a sample), is arranged (stored) inside the heat storage material 23 for the inner container inside the inner container main body 21. That is, inside the inner container main body 21, the heat storage material 23 for the inner container is arranged so as to surround the container 5 for the heat insulating object.

The heat storage material 23 for the inner container is a member for storing heat, and is realized by using, for example, a substance having a solid-liquid phase change temperature (for example, a melting point) near the heat retention target temperature. By realizing the heat storage material 23 for the inner container using a substance having a solid-liquid phase change temperature (for example, melting point) near the heat retention target temperature, the latent heat of the substance keeps the temperature near the heat retention target temperature near the heat retention target temperature. It can be maintained at a nearby temperature for a long period of time.

The heat storage material 23 for the inner container may be realized by mixing a plurality of substances so that the solid-liquid phase change temperature is close to the heat retention target temperature.

Further, in order to fix the container 5 for a heat insulating object inside the inner container main body 21, a fixing member 25 is arranged as shown in FIGS. 1 and 2. Then, for example, as shown in FIGS. 1 and 2, by fitting the end portion of the heat insulating object container 5 into the fixing member 25, the heat insulating object container 5 can store heat for the inner container inside the inner container main body 21. It is fixed in a predetermined position inside the material 23.

The inner container lid 22 is a lid (plug body) for airtightly closing the opening of the inner container main body 21 and keeping the space inside the inner container main body 21 in a closed state. For example, a screw thread is provided on the inner wall portion of the inner container lid 22, and a screw groove screwed with the screw thread is provided near the opening of the inner container main body 21. Then, by screwing a screw thread on the inner wall portion of the inner container lid 22 into a screw groove near the opening of the inner container main body 21, the inner container lid 22 makes the opening of the inner container main body 21 airtight. It is closed and the space inside the inner container body 21 is sealed. A screw groove may be provided in the inner wall portion of the inner container lid 22, and a screw thread screwed with the screw groove may be provided in the vicinity of the opening of the inner container main body 21.

Further, as shown in FIGS. 1 and 2, the heat insulating material 24 for the inner container is arranged inside the inner container lid 22. When the inner container lid 22 is composed of the outer lid 221 and the inner lid 222 as shown in FIGS. 1 and 2, the inner container heat insulating material 24 is arranged (filled) inside the inner lid 222. And / or, the heat insulating material 24 for the inner container may be arranged so as to be sandwiched between the outer lid 221 and the inner lid 222 in the space between the outer lid 221 and the inner lid 222.

The heat insulating material 24 for the inner container is preferably realized by a substance having a low thermal conductivity. The first heat insulating material 3A and the second heat insulating material 3B are realized by using, for example, foamed polyethylene, urethane, styrofoam, or the like.

<1.2: How to use the heat insulating container (manufacturing method)>
The method of using (manufacturing method) of the heat insulating container 100 configured as described above will be described.

3 to 6 are diagrams for explaining a method of using (manufacturing method) of the inner container 2.

7 to 12 are diagrams for explaining a method of using (manufacturing method) of the heat insulating container 100.

Further, as shown in FIGS. 3 to 12, it is assumed that the x-axis, the y-axis, and the z-axis are set.

Hereinafter, a method of using (manufacturing method) the heat insulating container 100 will be described with reference to the drawings.

For convenience of explanation, a case where the heat-retaining object is kept at 5 ° C. (that is, a case where the target temperature for heat-retaining is 5 ° C.) will be described as an example.

(1.2.1: How to use the inner container 2 (manufacturing method))
(State A1):
As shown in FIG. 3, the inner container main body 21 in a state where the inner container lid 22 is not attached is prepared (state A1). At this time, in order to facilitate the storage of the heat insulating object inside the inner container main body 21, it is preferable to place the inner container main body 21 in an upright state.

(State A2):
Next, as shown in FIG. 4, the heat storage material 23 for the inner container and the fixing member 25 are inserted into the inner container main body 21 and arranged at the position shown in FIG. 4 (state 2).

(State A3):
Next, as shown in FIG. 5, the heat-retaining object container 5 is attached to the fixing member 25 (for example, the cap portion of the heat-retaining object container 5 is attached to a predetermined position of the fixing member 25) to be attached to the heat-retaining object. The physical container 5 is fixed at a predetermined position in the inner container 2. The heat-retaining object container 5 stores the heat-retaining object, and after the inside of the heat-retaining object container 5 is set to the heat-retaining target temperature (5 ° C. in the case of the present embodiment), the heat-retaining object container 5 is stored. 5 is attached to the fixing member 25.

Further, the heat storage material 23 for the inner container is arranged inside the inner container main body 21 so as to surround the container 5 for the heat insulating object. The heat storage material 23 for the inner container is assumed to be a substance having a solid-liquid phase change temperature (for example, a melting point) near the heat retention target temperature (in the case of the present embodiment, around 5 ° C.).

(State A4):
Next, as shown in FIG. 6, the opening of the inner container body 21 is airtightly closed by the inner container lid 22 including the heat insulating material 24 for the inner container, and the space inside the inner container body 21 is sealed ( State A4). As shown in FIG. 6, the heat insulating material 24 for the inner container is arranged (filled) inside the inner lid 222 of the inner container lid 22, and is outside in the space between the outer lid 221 and the inner lid 222. By arranging the heat insulating material 24 for the inner container so as to be sandwiched between the lid 221 and the inner lid 222, the heat insulating material 24 for the inner container is included in the inner container lid 22.

As a result, the inner container 2 including the container 5 for the heat insulating object is acquired.

(1.2.2: How to use the outer container 1 (manufacturing method))
(State B1):
As shown in FIG. 7, the outer container main body 11 in a state where the outer container lid 12 is not attached is prepared (state B1). At this time, in order to facilitate the storage of the inner container 2 inside the outer container main body 11, it is preferable to place the outer container main body 11 in an upright state.

(State B2):
Next, as shown in FIG. 8, the first heat insulating material 3A is arranged inside the outer container main body 11 along the inside of the bottom portion of the outer container main body 11 and along the inner wall of the side wall portion (state B2).

The first heat insulating material 3A is, for example, a solid heat insulating material and is made of a substance having a low thermal conductivity (for example, foamed polyethylene).

(State B3):
Next, as shown in FIG. 9, the heat storage material 4 is arranged on the first heat insulating material 3A arranged at the bottom of the outer container main body 11 (state B3). The heat storage material 4 is realized by using a substance having a solid-liquid phase change temperature (for example, a melting point) lower than the heat retention target temperature (5 ° C. in the case of the present embodiment). In this embodiment, ice (melting point 0 ° C.) is used as the heat storage material 4. The heat storage material 4 may be a container in which ice is stored.

(State B4):
Next, as shown in FIG. 10, the inner container 2 is placed on the heat storage material 4 in an inverted state. That is, the inner container 2 is arranged so that the inner container lid 22 of the inner container 2 is on the heat storage material 4 side (state B4).

(State B5):
Next, as shown in FIG. 11, the second heat insulating material 3B is arranged near the opening of the outer container main body 11 so as to cover the bottom of the inner container 2 (state B5). As a result, the inner container 2 is surrounded by the first heat insulating material 3A, the second heat insulating material 3B, and the heat storage material 4, and the position of the inner container 2 can be appropriately prevented from being significantly displaced.

(State B6):
Next, as shown in FIG. 12, the opening of the outer container body 11 is airtightly closed by the outer container lid 12, and the space inside the outer container body 11 is sealed (state B6).

As described above, the heat insulating container 100 in which the inner container 2 including the container 5 for the heat insulating object is housed inside the outer container 1 is acquired. Since the heat insulating container 100 thus acquired can keep the heat insulating object warm for a long period of time, for example, the heat insulating object can be transported while being kept at a constant temperature (5 ° C. in the above case). can.

Here, the principle that the heat insulating object can be kept warm for a long period of time by the heat insulating container 100 will be described with reference to the drawings. For convenience of explanation, the description will be made while comparing with the case where the inner container 2 is stored in the outer container main body 11 in an upright state.

FIG. 13 is a vertical cross-sectional view of the heat insulating container 100 when the inner container 2 is stored in the heat insulating container 100 in an upright state, and schematically shows a path through which heat from the outside is transmitted into the inner container 2. be.

FIG. 14 is a diagram schematically showing a path through which heat from the outside is transmitted into the inner container 2 in a vertical cross-sectional view of the heat insulating container 100 (inner container 2 is in an inverted state) according to the first embodiment.

In the case of FIG. 13, since the inner container 2 is stored in the heat insulating container 100 in an upright state, heat from the outside is transferred to the inside of the inner container 2 by the path shown by the arrow AR1 in FIG. That is, in the case of FIG. 13, the opening of the outer container 1 and the opening of the inner container 2 are close to each other, and heat from the outside is easily conducted in the vicinity of the opening of the inner container 2, while the outside Heat from the outside is difficult to be conducted near the bottom of the inner container 2 located far from the opening of the container 1. Therefore, a temperature difference is likely to occur in the inner container 2 (the temperature is likely to be high near the opening of the inner container 2 and the temperature is likely to be constant near the bottom of the inner container 2), and the heat retention target stored inside the inner container 2 is likely to occur. There is room for improvement in order to keep the physical container 5 (or the object to be kept warm) at a constant temperature.

On the other hand, in the case of FIG. 14, since the inner container 2 is stored in the heat insulating container 100 in an inverted state, the heat from the outside is transferred to the inside of the inner container 2 by the path indicated by the arrow AR2 in FIG. It is transmitted. That is, in the case of FIG. 14, the opening of the outer container 1 and the opening of the inner container 2 are separated from each other, and it is difficult for heat from the outside to be conducted in the vicinity of the opening of the inner container 2. That is, in the heat insulating container 100 in which the inner container 2 is housed in the heat insulating container 100 in an inverted state, the heat transfer path through which the external heat is transferred to the inside of the inner container 2 becomes long, so that the heat insulating property is improved. As a result, in the heat insulating container 100, the container 5 for the heat insulating object (or the heat insulating object) housed in the inner container 2 can be kept at a constant temperature (5 ° C. in the present embodiment) for a long period of time.

Further, in the heat insulating container 100, as shown in FIG. 14, the heat storage material 4 is arranged near the bottom of the outer container 1, and the heat storage material 4 and the inner container lid 22 of the inner container 2 are in contact with each other. Since it is arranged in, it is difficult for heat from the outside to be conducted to the inner container 2. That is, heat from the outside becomes latent heat of the heat storage material 4 (for example, ice), and heat conduction to the inner container 2 can be prevented. Alternatively, the heat-retaining object) can be kept at a constant temperature (5 ° C. in this embodiment) for a long period of time.

Further, in the heat insulating container 100, since the heat storage material 23 for the inner container is installed in the inner container 2 with a substance having a solid-liquid phase change temperature (for example, melting point) near the heat retaining target temperature, the container 5 for the heat insulating object (for example) Alternatively, the heat-retaining object) can be kept near the heat-retaining target temperature for a long period of time. That is, when there is a temperature change in the inner container 2, the heat that causes the temperature change becomes the latent heat of the heat storage material 23 for the inner container, and the temperature change in the inner container 2 can be prevented.

Further, since the inner container lid 22 of the inner container 2 is configured to include the heat insulating material, it is possible to prevent abrupt heat conduction between the inner container 2 and the heat storage material 4, and as a result, it is possible to prevent heat from being suddenly conducted. In the inner container 2, the heat-retaining object container 5 (or the heat-retaining object) can be kept near the heat-retaining target temperature for a long period of time. In the case of the present embodiment, the heat retention target temperature is 5 ° C., the solid-liquid phase change temperature (for example, melting point) of the heat storage material 23 for the inner container is around 5 ° C., and the solid-liquid phase change temperature of the heat storage material 4 (for example, for example). Since the melting point) is 0 ° C., when the heat conduction from the outside to the inner container 2 from the heat insulating container 100 is small, the temperature of the inner container 2 is higher than the temperature of the heat storage material 4, and the heat is stored from the inner container 2. Heat tends to be transferred to the material 4. At this time, if the inner container 2 does not have the heat storage material 23 for the inner container and the inner container lid 22 of the inner container 2 does not have the heat insulating material 24 for the inner container, heat is directly transferred from the inner container 2 to the heat storage material (ice). It is conducted (directly escapes), and the temperature inside the inner container 2 becomes lower than the heat retention target temperature (5 ° C.). In the heat insulating container 100, since the heat storage material 23 for the inner container is installed in the inner container 2 and the heat insulating material 24 for the inner container is installed in the inner container lid 22 of the inner container 2, the heat storage material (ice) is installed from the inner container 2. ) Can be prevented from being directly conducted to heat, and as a result, the temperature inside the inner container 2 can be kept near the heat retention target temperature. That is, in the heat insulating container 100, the heat storage material 23 for the inner container is installed in the inner container 2, and the heat insulating material 24 for the inner container is installed in the inner container lid 22 of the inner container 2, so that the heat storage material from the inner container 2 is installed. The heat conduction to 4 (ice) is relaxed, and as a result, the temperature inside the inner container 2 is maintained at the target temperature for heat retention without excessively lowering the temperature of the heat storage material 23 for the inner container. Can be lengthened.

As described above, in the heat insulating container 100, due to the above configuration,
(1) In the inner container 2, the function of keeping the temperature of the heat insulating object (container for heat insulating object 5) constant is improved, and at the same time,
(2) The outer container 1 can enhance the heat insulating effect and improve the function of making the environmental temperature of the inner container 2 less likely to change.

Therefore, the heat insulating container 100 has a simple structure and can keep the heat insulating object warm for a long period of time.

In the above, the case of keeping cold (when the target temperature for heat retention is lower than the external temperature) has been described, but the present invention is not limited to this, and the case of keeping warm (when the target temperature for heat retention is higher than the external temperature). The present invention can be applied.

When heat is retained (when the heat retention target temperature is higher than the external temperature), the solid-liquid phase change temperature (for example, melting point) of the heat storage material 4 is higher than the solid-liquid phase change temperature (for example, melting point) of the heat storage material 23 for the inner container. The heat storage material 4 may be configured so as to be high.

[Other embodiments]
In the heat insulating container 100 of the above embodiment, when the inner container 2 is not inserted into the outer container 1 in an inverted state (for example, when the inner container 2 is inserted into the outer container 1 in an upright state), the outer container 1 The outer container lid 12 may not be normally fitted to the outer container body 11. In order to realize this, for example, in the outer container 1 and / or the inner container 2, a protruding portion is provided, and the outer container 1 is inserted only when the inner container 2 is inserted into the outer container 1 in an inverted state. The outer container lid 12 may be configured to fit normally into the outer container body 11. Alternatively, when the inner container 2 is not inserted into the outer container 1 in the inverted state (for example, when the inner container 2 is inserted into the outer container 1 in the upright state), the inner container 2 exceeds the outer container main body 11. An outer container 1 and / or an inner container 2 having a shape that protrudes so that the outer container lid 12 of the outer container 1 does not normally fit into the outer container main body 11 may be adopted.

In the above embodiment, "same" is a concept including being substantially the same.

Further, in the above-described embodiment (including a modified example), there is a portion in which only the main members necessary for the above-mentioned embodiment are simplified and shown among the constituent members. Therefore, any component not specified in the above embodiment may be provided. Further, in the above-described embodiment and drawings, the dimensions of each member do not faithfully (exactly) represent the actual dimensions, the dimensional ratio, and the like. Therefore, the dimensions, the dimensional ratio, and the like can be changed without departing from the spirit of the present invention.

The specific configuration of the present invention is not limited to the above embodiment, and various changes and modifications can be made without departing from the gist of the invention.

100 Insulation container 1 Outer container 11 Outer container body 12 Outer container lid 2 Inner container 21 Inner container body 22 Inner container lid 3A 1st heat insulating material 3B 2nd heat insulating material 4 Heat storage material

Claims (8)

An outer container having a bottomed cylindrical outer container body having a first opening, and an outer container lid for closing the first opening.
An inner container for storing a heat-retaining object, which can be stored in the outer container, has a bottomed cylindrical inner container body having a second opening, and an inner container lid that closes the second opening. The inner container provided with
Equipped with
The inner container is
In the state of being stored in the outer container, the distance between the first opening and the second opening is arranged to be longer than the distance between the first opening and the bottom of the inner container. ,
Insulation container. With more heat storage material,
The heat storage material is arranged at a position between the inner container lid and the inner wall portion of the outer container body.
The heat insulating container according to claim 1. With more insulation,
The heat insulating material is arranged inside the outer container and is arranged so as to surround the inner container and the heat storage material.
The heat insulating container according to claim 2. The inner container contains a heat storage material for the inner container.
The heat insulating container according to any one of claims 1 to 3. The inner container includes a heat insulating material for the inner container in the inner container lid.
The heat insulating container according to any one of claims 2 to 4. The heat storage material is composed of a substance whose solid-liquid phase change temperature of the heat storage material is different from the solid-liquid phase change temperature of the heat storage material for the inner container contained in the inner container.
The heat insulating container according to claim 5. An outer container used for the heat insulating container according to any one of claims 1 to 6.
A bottomed cylindrical outer container body having a first opening,
The outer container lid that closes the first opening, and
The heat insulating material disposed inside the outer container body and
An outer container equipped with. An inner container used for the heat insulating container according to any one of claims 1 to 6.
A bottomed cylindrical inner container body with a second opening,
The inner container lid that closes the second opening, and
A heat storage material for the inner container, which is composed of a substance having a solid-liquid phase change temperature near the target temperature for heat retention,
Inner container equipped with.

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