JP2012250739A - Portable heat insulation container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable lightweight heat insulation container with superior heat insulation, which can be repeatedly and easily opened/closed, and which is easy to handle.SOLUTION: The portable heat insulation container includes a container body and at least one lid part. A storage space formed by attaching the lid part to an opening of the container body is thermally insulated from external space. The portable heat insulation container has a heat source storage part for storing a heat source. As the heat source, a refrigerant by use of sublimation or chemical reaction, a heat generating agent by use of chemical reaction, or a heat storage member can be used. A heat dispersion member is disposed between the storage space and the heat source storage part. Thermal energy is transmitted via the heat dispersion member between the heat source storage part and the storage space.

Description

  The present invention relates to a portable heat retaining container for carrying a beverage or the like while keeping it at a desired low or high temperature state.

  When carrying a beverage or the like in a plastic bottle while maintaining a low temperature under hot weather, it is conceivable to carry the beverage by refilling it into a metal double vacuum container or the like, for example. However, it cannot be denied that such a container is large and heavy with respect to the capacity of the beverage, and refilling is troublesome. Therefore, recently, for example, it has been carried out by putting a plastic bottle in a heat insulating bag made of, for example, a heat insulating sheet.

  However, such heat insulation bags only weaken the temperature rise of the beverage because of its low cooling power. For example, even if a cold beverage containing a plastic bottle is carried in a heat insulating bag, the beverage cannot be kept cold for a long time. Of course, it is impossible to keep a frozen dessert such as ice cream at a low temperature using a heat insulation bag. The same applies to the case of carrying a warm beverage or the like.

  In order to transport frozen desserts, frozen foods, and the like in an atmosphere below freezing, they are housed together with a cold insulation agent such as dry ice in a heat insulation container such as plastic having excellent heat insulation properties. For such applications, a heat insulating container provided with a case provided with a heat insulating material and a diffuser covered with a heat insulating material and appropriately diffusing dry ice or the like and its cold heat into the case has been devised (Patent Document 1). The same applies to the case of carrying a beverage or the like while maintaining a warm state, and a heat retaining case has been devised in which a heating element is disposed at least at the bottom of the case body (Patent Document 2). In either case, it can be said that the heat source (cold heat source or warm heat source) is accommodated in a heat insulating case for transportation, and cold heat or warm heat is transmitted to the inside of the heat insulating case.

Japanese Patent No. 3988119 JP 2001-149233 A

  As described above, a heat insulating bag made of a heat insulating sheet or the like cannot keep a beverage or the like in a low temperature state or a warm state for a long time.

  In addition, the case for transporting using a cooling agent such as dry ice is intended for transporting and not for carrying, so the convenience and handling required for carrying it by a person are not included. Not easy. For example, in order to carry a beverage or the like in a heat retaining container, the heat retaining container must be small and light, and can be easily opened and closed repeatedly, and can be generated by opening and closing the heat retaining container. It is preferable to compensate for the loss of cold heat or the like by supplementing with a cold insulation agent.

  On the other hand, in a cold insulated container intended for transportation, etc., it is required to shorten the transportation time, shape that does not cause dead space as cargo, reduce material costs such as cardboard and recycle, etc. The function of replenishing the cryogen is not required. Of course, it is not necessary to respond to the request for carrying by a person. The same applies to a heat retaining case that maintains a warm state using a heating element.

  Accordingly, an object of the present invention is to realize a portable heat retaining container that is easy to handle, open and close, is excellent in portability and heat retention, and can be easily replenished with a heat source such as a cryogen.

  In order to solve the above problems, a portable heat-retaining container according to the present invention (Claim 1) has a container body and at least one lid, and can be repeatedly opened and closed, and the lid is provided at the opening of the container body. The housing space formed by mounting is thermally blocked from the external space, and the portable heat retaining container has a heat source housing portion that houses the heat source.

  The heat source accommodating portion accommodates a cooling agent due to sublimation or chemical reaction, a heat generating agent due to chemical reaction, or a heat storage member (for example, a member having a large specific heat), and the space between the accommodating portion space and the heat source accommodating portion. A heat diffusing member is interposed therebetween, so that heat energy is transmitted through the heat diffusing member between the accommodating portion space and the heat source accommodated in the heat source accommodating portion.

  Therefore, in the portable heat retaining container, if, for example, dry ice is stored in the storage space, the cold heat of the dry ice is transmitted to the storage space via the heat diffusing member, and beverages stored in the storage space ( (Containment) can be maintained at a low temperature. When the heat generating agent is accommodated in the heat source accommodating portion, the warm air is transmitted to the accommodating portion space via the heat diffusing portion, so that the accommodated item can be kept warm.

  Here, as a heat source, the use of a cooling agent by sublimation or a chemical reaction, a heat generating agent by a chemical reaction, or a heat storage member eliminates the need to supply energy such as power from the outside, which is convenient to carry. Also, since dry ice or the like does not melt and become water, and the cold storage by chemical reaction, the exothermic agent, the heat storage member having a large specific heat, etc. are all packaged, the handling is convenient.

  Furthermore, if the heat source housing part has a structure that can be opened and closed (Claim 2), the cold insulation agent or the heat generating agent can be replaced or supplemented, and the contents can be kept in a desired state for a long time. it can. If the heat source housing can be opened and closed without removing the lid from the container body, it is possible to replace and replenish the cooling agent without opening the housing space, so that the contents can be kept in a desired state for a longer time. can do.

  The heat source accommodating part may be provided in the lid part (Claim 3), or may be provided in the container body (Claim 4). If the container body is a bottomed container (for example, a bottomed container having a substantially cylindrical shape), a beverage in a plastic bottle or the like can be easily taken in and out by opening and closing the lid. ).

  In the portable heat-retaining container (Claim 6) in which the diameter in at least a part of the accommodating portion space is smaller than the diameter in other places, when the accommodated item is accommodated in the accommodating portion space, the inner peripheral wall surface and the accommodating portion of the accommodating portion space are accommodated. An air passage can be formed between the peripheral surface of the body portion of the object. For example, when the accommodating portion space has a reduced diameter at the bottom, an air passage is formed in the vicinity of the peripheral surface of the trunk of the accommodation in the accommodating portion space above the bottom, and convection is likely to occur.

  In the portable heat insulating container (Claim 7) in which the convex portion is formed on the inner peripheral wall surface of the container main body in the radial cross section in at least a part of the storage space, when the storage object is stored in the storage space, Even if all the convex portions on the inner peripheral wall surface of the container main body are in contact with the contents, at least portions other than the convex portions (portions where the concave portions are formed) form an air passage. Therefore, the thermal energy transmitted through the heat diffusing member is efficiently transmitted to the accommodation by convection generated in the air passage.

  Here, if the heat diffusing member has a vent (Claim 8), it is more efficient to transfer heat energy by heat conduction and convection between the heat source accommodated in the heat source accommodating portion and the accommodating space. Often done.

  The portable heat insulation container according to the present invention can be kept cold without supplying energy such as electricity from the outside, the heat source such as a cold insulation agent can be easily exchanged, and water like when using ice is used. It is easy to handle because there is no need to clean up, and it is suitable for carrying because it has a simple structure, can be reduced in size and weight, and can be easily opened and closed.

It is an external appearance perspective view of the portable heat retention container which concerns on one Example of this invention. It is a figure which shows the cross-sectional schematic structure of the portable heat retention container shown in FIG. It is a figure which shows the cross-sectional schematic structure of the cover part which the portable heat retention container shown in FIG. 1 has. It is a figure which shows the cross-sectional schematic structure in the modification of the cover part which the portable heat retention container shown in FIG. 1 has. It is a figure which shows the cross-sectional schematic structure in the other modification of the cover part which the portable heat retaining container shown in FIG. 1 has with the container main body. It is a figure which shows the modification of the thermal-diffusion member which the portable heat retention container shown in FIG. 1 has. It is a figure which shows the modification of the trunk | drum heat insulation member and bottom part heat insulation member which the portable heat retention container shown in FIG. 1 has. It is a figure which shows the modification of the trunk | drum heat insulation member which the portable heat retention container shown in FIG. 1 has. It is a figure which shows the cross-sectional schematic structure of the container main body bottom part side of the portable heat retention container in the other Example (Example 2) of this invention. It is a figure which shows the cross-sectional schematic structure of the container main body bottom part side of the portable heat retention container in other Example (Example 3) of this invention.

  Hereinafter, a portable heat insulating container according to the present invention will be described with reference to the drawings.

(About portable insulation containers)
FIG. 1 is a perspective view of the appearance of a portable heat retaining container according to one embodiment of the present invention, FIG. 2 is a diagram showing a schematic cross-sectional configuration thereof, and FIG. 3 is a diagram showing a schematic cross-sectional configuration of a lid portion thereof. It is. As shown in FIG. 1, the portable heat retaining container 10 includes a container body 20 having a bottomed shape and a lid 30 attached to the opening 21 of the container body 20 (arrow A).

  As shown in FIG. 2, the container body 20 has a body portion 22 (substantially cylindrical shape) and a bottom portion 23 each made of, for example, plastic. Inside the barrel 22 and the bottom 23, for example, a barrel heat insulating member 22a and a bottom heat insulating member 23a, which are integrally formed of, for example, styrene foam, are disposed so as to be in contact with each other. The space 24 (substantially cylindrical space) can be thermally blocked from the external space of the container body 20. The container body 20 is formed, for example, such that the body portion 22 and the bottom portion 23 can be divided, and the body heat insulating member 22a and the bottom heat insulating member 23a are inserted into the body portion 22 and then closed by the bottom portion 23. It can also be set as a structure.

  As shown in FIG. 3, the lid part 30 has a plug part 31, a lid body part 32, and a ceiling part 33, which are made of, for example, plastic, and the lid body part 32 and the ceiling part 33 have a bottomed cylindrical shape. (The ceiling 33 is on the bottom side). The lid 30 closes the opening 21 of the container body 20 on the side of the stopper 31.

  Inside the lid body part 32 and the ceiling part 33, the lid body part heat insulating member 32a and the ceiling part heat insulating member 33a are arranged so as to be in contact with each other. ) Is formed. As shown in FIG. 3, the heat source accommodating part 34 is opened on the plug part 31 side, and the opening can be closed by screwing the heat diffusion member 11 into the plug part 31 (arrow B). The heat diffusing member 11 is formed of a plastic having an appropriate thermal conductivity, a metal having an appropriate appropriate thermal conductivity, or the like.

  As shown in FIG. 2, after the heat source 12 (for example, dry ice that is a cold heat source) is accommodated in the heat source accommodating portion 34 of the lid 30 and closed with the heat diffusing member 11, the lid 30 is opened in the container body 20. Attach to 21. Then, the cold heat of the heat source 12 is transmitted and diffused in the housing part space 24 thermally blocked from the external space by the heat conduction of the heat diffusing member 11 and the convection of air in the housing part space 24.

  Here, the lid 30 is attached by, for example, inserting the plug portion 31 of the lid 30 into the open end 21a of the container body 20 and then connecting the lid 30 to the container body 20 with a buckle or the like (not shown). Alternatively, it is performed by connecting the plug portion 31 of the lid portion 30 and the open end portion 21a of the container body 20 by, for example, a screw portion.

  Moreover, the portable heat retaining container 10 is convenient to carry in accordance with the storage space 24 of, for example, a size that can store a beverage containing a plastic bottle or a size that can store a plurality of frozen desserts such as ice cream. Various shapes and sizes can be determined.

(About heat insulation)
If a frozen dessert or a beverage containing a plastic bottle is stored in the portable heat retaining container 10 and dry ice is used as the heat source 12, the frozen dessert can be maintained at a temperature below the freezing point, or the beverage containing the plastic bottle is maintained at a low temperature. Can do. Since the dry ice is sublimated to maintain a low temperature and there is no need to clean up when it melts like ice and turns into water, the portable heat retaining container 10 is excellent in handling.

  Further, since the heat diffusing member 11 of the lid part 30 can be easily removed, it is possible to maintain the contents in a low temperature state for a long time by replenishing with dry ice. Nowadays, it is possible to purchase dry ice pellets at convenience stores, etc., so if consumers use portable thermal insulation container 10 for excursions, etc., refilling dry ice at the destination will lead to longer desserts. Can be stored at low temperatures over time. Alternatively, for example, by using an exothermic agent due to a chemical reaction as the heat source 12, tea in a plastic bottle or the like can be maintained in a warm state.

  In addition, when the purpose is to keep warm for a short time in the home, a metal having a relatively large specific heat can be cooled or heated to be used as a heat source. As described above, the portable heat retaining container 10 is excellent in that the heat source can be properly used according to the application.

(Modification 1 of a cover part)
FIG. 4 is a diagram showing a schematic configuration of a lid 30A that is a modification of the lid 30 (the lid 30 and the lid 30A can maintain compatibility). Here, components having the same functions as those of the lid 30 are denoted by the same reference numerals, and description thereof is omitted. The lid body portion of the lid portion 30A is configured to be separable into a first body portion 32x on the ceiling portion 33 side and a second body portion 32y on the plug portion 31 side. The heat source housing part 34 is integrally formed by connecting the first body part 32x and the second body part 32y on the plug part 31 side by, for example, both screw parts (not shown) (arrow C).

  The lid 30A not only accommodates the heat source 12 such as dry ice in the heat source accommodating portion 34 but also closes the opening 21 of the container body 20 (the accommodating portion space 24 is thermally blocked from the external space). Since the heat source 12 such as dry ice can be replenished (in a state), the contents can be maintained and stored at a low temperature for a longer time.

(Modification 2 of the lid)
FIG. 5 is a view showing a schematic configuration of a lid 30 </ b> B which is a modification of the lid 30 together with the container body 20. The lid portion 30 </ b> B can be connected to the body portion 22 of the container body 20 by the hinge 13 to open and close the opening 21 of the container body 20. On the side facing the hinge 13, the lid 30 </ b> B can be locked to the container body 20 with a buckle (not shown). The heat source accommodation portion 34 of the lid portion 30B is closed by the detachable heat diffusion member 11, and can accommodate the heat source 12 such as dry ice. Of course, the lid part 30B can be configured to be separable into a first trunk part 32x on the ceiling part 33 side and a second trunk part 32y on the plug part 31 side, like the lid part 30A. .

(Modification of heat diffusion member)
The heat diffusing member 11 may be formed in a disk shape without holes, but as shown in FIG. 6A, a narrow slit in the diameter direction is provided near the periphery of the disk-shaped heat diffusing member 11A. A large number of 11s may be provided. The slit 11s is a ventilation hole between the housing space 24 and the heat source housing 34 in the vicinity of the periphery of the heat diffusing member 11A, and is a peripheral surface of, for example, a body portion of a plastic bottle housed in the housing space 24. As a result, convection is generated, and the cooling effect is promoted. Of course, in the region other than the slit 11s of the heat diffusing member 11A, the cold heat is transmitted to the accommodating portion space 24 by heat conduction.

  Alternatively, as shown in FIG. 6B, almost the entire area of the disk-shaped heat diffusion member 11B may be formed in a mesh shape. Then, a large number of meshes 11m serve as vent holes between the accommodating space 24 and the heat source accommodating portion 34, and the cooling heat of the heat source 12 (for example, dry ice) is guided to the accommodating space 24, so that the cooling effect is promoted. .

(Modified example 1 of the trunk, etc.)
FIG. 7 is a view showing a modified example of the body heat insulating member 22 a and the bottom heat insulating member 23 a in the body 22 and the bottom 23 of the container body 20. The inner diameter of the inner peripheral wall surface 22b of the body heat insulating member 22a is d in most areas (the diameter of the accommodating space 24 is d in most areas). However, in the vicinity of the bottom heat insulating member 23a, the diameter of the inner peripheral wall surface 22b is gradually reduced, and the diameter is reduced to d1 on the surface 23b of the bottom heat insulating member 23a.

  When the PET bottle 1 having a diameter d or less is accommodated in the accommodating portion space 24, the bottom portion of the PET bottle is positioned in a region where the diameter of the inner peripheral wall surface 22b is reduced, and the outer peripheral surface of the trunk portion of the PET bottle 1 and the barrel thermal insulation. A ventilation path 24a is formed between the inner peripheral wall surface 22b of the member 22a (FIG. 7). Since the air passage 24a has a cylindrical shape and contacts the heat diffusing member 11 on the lid portion 30 side, cold air or the like by the heat source 12 (for example, dry ice) housed in the heat source housing portion 34 of the lid portion 30 is It is efficiently transmitted to the plastic bottle 1 by the convection generated in 24a (the beverage contained in the plastic bottle 1 is efficiently cooled or the like).

(Modification 2 of the trunk, etc.)
FIG. 8 shows that at least a part of the body portion 22 of the container body 20 has four protrusions 22c on the inner peripheral wall surface 22b of the body heat insulating member 22a (the inner peripheral wall surface of the container body, the diameter of which is d). 8 is a diagram showing an example of the cross-sectional configuration of the body portion when the container is provided (FIG. 8 shows an example of the cross-sectional configuration of the body portion 22 of the container body 20 shown in FIG. Is a diagram showing. Here, the diameter of a virtual circle (two-dot chain line circle) connecting each vertex 22d of each convex portion 22c is d2, and a plastic bottle or the like having a diameter slightly smaller than d2 is accommodated in the accommodating space 24 of the container body 20. Then, four ventilation paths 24b are formed between the outer peripheral surface of the trunk portion such as a plastic bottle and the inner peripheral wall surface 22b of the trunk portion heat insulating member 22a.

  In this way, by forming the air passage 24b in at least a part of the body portion 22 of the container body 20, the upper side of the storage space 24 (the side in contact with the heat diffusing member 11 of the lid portion 30) and the bottom of the storage space 24 are formed. It is possible to efficiently cool the stored item by causing convection between the side (the bottom heat insulating member 23a side).

  FIG. 9 is a diagram showing a schematic cross-sectional configuration on the bottom 23X side of the container body 20A in another example (Example 2) of the portable heat-retaining container according to the present invention. The container body 20A is different from the container body 20 of the portable heat retaining container 10 in that the container body 20A also has a heat source housing part 25 for housing a heat source on the bottom 23X side. In addition, the same code | symbol is attached | subjected to the component which has the same function as Example 1, and those description is abbreviate | omitted.

  The trunk portion 22X of the container body 20A has a bottom opening 21b on the bottom side. At a distance L from the bottom opening 21b, the inside of the body heat insulating member 22a is partitioned by the heat diffusing member 11X. When the bottom opening portion 21b of the trunk portion 22X is closed by the bottom portion 23X (FIG. 9, arrow D), a heat source accommodating portion 25 is formed on the bottom portion 23X side of the trunk portion 22X (between the heat source accommodating portion 25 and the accommodating portion space 24). In the state where the heat diffusing member 11X is interposed, the heat source accommodating portion 25 thermally insulated from the external space by the bottom heat insulating member 23a disposed inside the bottom portion 23X and the body heat insulating member 22a of the body portion 22X. Is formed).

  In the portable heat insulating container having such a container main body 20A, the stored item can be kept warm and maintained at a low temperature state or the like by the heat source accommodated in the heat source accommodating portion 25 provided on the bottom 23X side. It can be stored at a low temperature (for example, stored below freezing point) or stored for a longer time. Moreover, since the heat source accommodated in the heat source accommodating part 25 can be replenished without opening the accommodating part space 24, it is excellent as a heat insulation container.

  Of course, it is possible to keep the stored items warm only by the heat source of the heat source accommodating portion 25 provided inside the bottom portion 23 </ b> X of the container body 20 without providing the heat source accommodating portion 34 in the lid portion 30.

  FIG. 10 is a diagram showing a schematic cross-sectional configuration of the bottom side of the container body 20B in another embodiment (Example 3) of the portable heat retaining container according to the present invention. The container main body 20 </ b> B is different from the container main body 20 of the portable heat retaining container 10 in that the container main body 20 </ b> B also has a bottom side lid portion 40 on the bottom side. In addition, the same code | symbol is attached | subjected to the component which has the same function as Example 1 and 2, and those description is abbreviate | omitted.

  The bottom side lid part 40 has a lid bottom part 41, a lid body part 42, and a plug part 43, which are made of plastic, for example, and the lid bottom part 41 and the lid body part 42 have a bottomed cylindrical shape. A plug portion 43 is positioned on the opening side of the bottomed cylindrical shape. The bottom side lid 40 is configured to close the bottom opening 21b of the container body 20B on the side of the stopper 43 (arrow E).

  Inside the lid bottom part 41 and the lid body part 42, the lid bottom part heat insulation member 41a and the lid body part heat insulation member 42a are arranged so as to be in contact with each other, and the heat source accommodating part 44 (substantially cylindrical space) is provided inside them. Is formed.

  In the heat source housing portion 44 shown in FIG. 10, the heat diffusion member 11 </ b> Y disposed on the plug portion 43 side is detachably attached by screwing or the like into the plug portion 43. If this heat diffusing member 11Y is removed, a cold heat source such as dry ice can be placed in the heat source housing 44.

  In the portable heat-retaining container having the container body 20B, the stored item can be kept at a low temperature by the heat source housed in the heat source housing section 44 of the bottom side lid 40 positioned on the bottom side of the container body 20B. Therefore, for example, storage at a lower temperature (for example, storage below freezing point) or storage for a longer time becomes possible. In addition, the temperature of the stored item can be kept only by the heat source accommodated in the heat source accommodating portion 44 of the bottom side lid portion 40.

  Here, the heat diffusing member 11Y may be disposed on the container body 20B side. If it becomes like this, by removing the bottom side cover part 40 from the container main body 20B, the heat source of the heat source accommodating part 44 can be replenished etc. in the state which closed the accommodating part space 24 with the thermal-diffusion member 11Y. Of course, if the bottom cover 40 is attached to the container body 20B, the heat source housing 44 can be sealed.

  Note that the present invention is not limited to the above-described embodiment, and can be appropriately modified and implemented without departing from the spirit of the present invention.

  The portable heat-retaining container according to the present invention can be manufactured, sold, etc. as products that can be carried or stored while maintaining frozen desserts, beverages, etc. in a low temperature state. It is an invention that has industrial value and can be used industrially.

10 Portable Insulation Container 11, 11A, 11B, 11X, 11Y Heat Diffusion Member 11m Vent (Net of Heat Diffusion Member)
11s Vent (slit of heat diffusion member)
12 heat sources 20, 20A, 20B container body 21 opening 21b opening (bottom opening)
22 body part 22b inner peripheral wall surface of container body (inner peripheral wall surface of body heat insulating member)
22c Convex part 24 (formed on wall part of accommodating part) Accommodating part space 25, 34, 44 Heat source accommodating part 30, 30A, 30B Lid part 40 Lid part (bottom side lid part)

Claims (8)

In a portable heat retaining container having a container body and at least one lid,
A housing space formed by mounting the lid on the opening of the container body is thermally blocked from the external space,
The portable heat-retaining container has a heat source accommodating portion for accommodating a heat source;
As the heat source, a cooling agent by sublimation or chemical reaction, a heat generating agent by chemical reaction, or a heat storage member can be used,
A heat diffusing member is interposed between the housing space and the heat source housing,
A portable heat-retaining container, wherein heat energy is transmitted between a heat source housing and the housing space via a heat diffusion member. The heat source housing part is configured to be openable and closable,
The portable heat insulating container according to claim 1, wherein the cold insulating agent or the heat generating agent can be exchanged. The portable heat retaining container according to claim 1, wherein the lid has a heat source housing. The portable heat-retaining container according to claim 1, wherein the container main body has a heat source housing portion. The portable heat-retaining container according to claim 3 or 4, wherein the container body is a bottomed container. The housing space is a columnar space;
The portable heat retaining container according to any one of claims 3 to 5, wherein a diameter of at least a part of the accommodating portion space is smaller than a diameter of the other portion. The housing space is a columnar space;
6. The portable type according to claim 3, wherein a convex portion is formed on an inner peripheral wall surface of the container main body in a radial cross section in at least a part of the accommodating portion space. Thermal insulation container. The portable heat retaining container according to any one of claims 3 to 7, wherein the heat diffusing member has a vent hole.

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