JPH11223441A - Cover for heat insulation container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cover for a heat insulation container having a handleability and an excellent heat insulation, by cooling only a cool storage agent container for easily detaching from or attaching to a frame for constituting the cover without the cover itself, or heating only a thermal storage agent container. SOLUTION: The cover for a heat insulation container comprises a frame l, and a cool storage agent container 2 or a thermal storage agent container detachably engaged with the frame 1. The cover for the container comprising the frame 1, a metal molding plate 4 engaged with an inner side edge near its lower surface, and the container 2 or the thermal storage agent container detachably engaged therewith also preferably has a high utility. As a container body, a conventional body having a hard polyurethane foam 5 filled between a resin outside container and a metal inside container can be used as it is. The container 2 or the thermal storage agent container contains a cool storage agent 3 or a cool storage heat having a volume of 50% or less of its inner volume. An upper portion of the container is formed in a space to form the cover having high heat insulation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a frame and a regenerator container or a regenerator container (hereinafter, also referred to as a "regenerator container or the like"). The present invention relates to a lid for a heat insulating container that can be attached to and detached from a heat insulating container. In the lid for the heat insulating container of the present invention, the cold storage agent container and the like are removed from the frame,
Because only these can be cooled or heated,
Freezing of the cold storage agent or melting of the heat storage agent can be performed efficiently. In addition, in the present invention, a lid for a heat insulating container having more excellent heat insulating properties can be obtained by using a cold storage agent container or the like in which a space is provided in the upper portion or the upper portion has a large thickness. INDUSTRIAL APPLICABILITY The lid for an insulated container according to the present invention can be used as a lid for an insulated container for transporting and storing foods or the like that require cooling or heat retention.

[0002]

2. Description of the Related Art Conventionally, insulated containers for transporting and storing foods or the like which need to be kept cool or warm are shown in FIG.
As shown in (a), a lid 6 made of a resin hollow body is used. On the other hand, as the container body 7, for example, FIG.
As shown in (b), a hard space is provided between a resin container 71 formed by an injection molding method or the like and a metal container 72 such as stainless steel stored inside the resin container. One filled with a resin foam such as polyurethane foam 5 is used.

The lid 6 made of a resin hollow body may be filled with a rigid polyurethane foam or the like in this hollow part. In addition, when the performance of keeping cold or keeping heat is not always enough, a lid in which the cold storage agent 3 or the like is stored in the hollow portion is used as shown in FIG. However, with this lid, a trace of processing in which the filling port for the cold storage agent or the like is sealed remains on the side surface, which may cause a problem in appearance. Furthermore, when performing freezing of the cold storage agent or thawing of the heat storage agent, it is necessary to store the lid itself in a freezer or the like, or a constant temperature bath or the like, and to cool or heat it. .
In the case of an insulated container in which the lid 6 is attached to the container main body 7 by a hinge or the like, the lid is removed from the container main body and then cooled or heated. Nothing to do, not practical.

Further, as shown in FIG. 8, a lid 6 is used in which the regenerator container 2 and the like are fixed to the back surface of a lid main body 61 made of a resin molded product by locking members 8 such as bolts and nuts. However, with this lid, moisture, food, and the like may evaporate or scatter, causing dirt to adhere to the periphery of the locking member 8 or the gap between the back surface of the lid main body 61 and the cold storage agent container 2 or the like, and accumulate. ,
Such dirt may cause germs to multiply. Since these dirt and various germs are a serious problem as a container for transporting and storing foods, it is necessary to remove the regenerator container 2 and the like from the lid, and wash and clean them. However, such cleaning is considerably troublesome. Work. In the lid of FIG. 8, when the cold storage agent is frozen or the heat storage agent is thawed, FIG.
There is no need to freeze or thaw the lid itself as in the lid of (a). However, as in the case of cleaning and cleaning, it is necessary to remove the cold storage agent container 2 and the like from the lid main body 61, which is inferior in workability.

[0005]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and is directed to a heat insulating container having a frame and a regenerator container which can be detachably fitted to the frame. The purpose is to provide a lid. It is another object of the present invention to provide a lid for a heat insulating container having a more excellent heat insulating property by making the cold storage agent container and the like have a specific structure with low thermal conductivity. With the lid for a heat insulating container of the present invention, a regenerator or a regenerator can be efficiently cooled or heated. Furthermore, when a regenerator container or the like having a specific structure and excellent heat insulating properties is used, a heat insulating container capable of transporting and storing foods or the like that require cooling or heat retention for a long time while maintaining their freshness, etc. Can be easily obtained.

[0006]

According to a first aspect of the present invention, a lid for a heat insulating container is detachably fitted in a space defined by a frame constituting a peripheral portion of the lid and an inner peripheral surface of the frame. A cold storage container or a heat storage agent container.

[0007] In the heat-insulating container lid according to the second aspect of the present invention, a frame constituting a peripheral portion of the lid and an edge thereof are fixed to the frame at an inner peripheral edge near a lower surface of the frame, and are dropped. A cold storage agent container or a heat storage agent container detachably fitted in a space formed by the inner peripheral surface of the frame and the upper surface of the metal molded plate. And The lid for the heat insulating container of the first and second inventions is shown in FIG.
It can be used as a lid of a conventional heat insulating container body as in (b).

In the first and second inventions, the above-mentioned "frame"
Can be obtained by molding a resin excellent in low-temperature brittleness and the like by an appropriate method such as injection molding, blow molding and compression molding. As this resin, general-purpose resins such as polyolefins such as polyethylene and polypropylene, polyamides and polyesters can be used. Especially,
Polyolefins that are excellent in low-temperature brittleness, have practically sufficient heat resistance, and are excellent in water resistance, chemical resistance, and the like are frequently used. High-density polyethylene, which is easy to mold and has high strength, is more preferable.

As the resin forming the "cool storage agent container" and the "heat storage agent container", high-density polyethylene having excellent low-temperature brittleness, sufficient heat resistance, high strength, and low cost is frequently used. However, the present invention is not limited to this. Further, in the second invention, the above-mentioned "metal molded plate" forming the drop portion of the lid has high safety, is hardly rusted, and has strength enough to withstand the load of the cold storage container or the like. Although it depends on the size of the lid and the weight of the cold storage container, a molded plate made of stainless steel having a thickness of about 0.3 to 1.5 mm is preferable.

In general, the regenerator stored in the regenerator container preferably freezes in a short time, requires less energy for freezing, and has a long effective cold-retention time. Practically, water having a large latent heat of fusion and containing a gelling agent, a cryogen and the like as a main component is frequently used. As the gelling agent, a water-insoluble superabsorbent polymer obtained by crosslinking a hydrophilic polymer such as carboxymethylcellulose, polyvinyl alcohol, sodium polyacrylate, or polyacrylamide can be used. In addition, natural polysaccharides such as starch, gelatin, and guar gum can also be used. This gelling agent is usually added in an amount of about 1 to 5 parts by weight, especially about 1 to 3 parts by weight, based on 100 parts by weight of the regenerator. The viscosity of the regenerator decreases with a decrease in the amount of the gelling agent, and when the regenerator is filled in a container, for example, the handleability is improved. .

Examples of the cryogen include metal salts of inorganic acids such as sodium chloride and potassium chloride, and polyhydric alcohols such as ethylene glycol and propylene glycol. The required amount of these cryogens may be added to water depending on the desired melting point of the regenerator. Further, when the regenerator is in a supercooled state, a long time is required for freezing and a large amount of energy is required. Therefore, a nucleating agent is often blended so as to quickly freeze near the melting point. This nucleating agent serves as an ice crystal nucleus for freezing the regenerator, and inorganic or organic compounds such as silver iodide, methaldehyde, α-phenazine, and steroids can be used. In addition, the cold storage agent may further contain additives usually used for this type of cold storage agent, such as an antiseptic, an antifungal agent, and a color powder, in an amount that does not impair the properties thereof, if necessary. You can also.

The heat storage agent contained in the heat storage agent container includes calcium chloride mixed salt system, calcium chloride single salt system, dibasic sodium phosphate / 12-hydrate system, sodium acetate / 3-hydrate mixed salt system. A sodium acetate trihydrate single salt system and a magnesium nitrate hexahydrate single salt system may, for example, be mentioned. As the heat storage agent, an appropriate one can be selected and used depending on the inner volume of the container body, the type of food material to be kept warm, the storage amount, and the like.

In the first and second inventions, the frame may be a solid body, but is preferably a hollow body. If the frame body is a hollow body, a lighter lid with better heat insulation properties can be obtained. When the frame is a hollow body, for example, if the frame is made of high-density polyethylene, the thickness of the molded wall is 1 to 5 mm; if the lid is a small lid, it is 1 to 2 mm; About 5 mm, especially about 2 to 3 mm is sufficient. By filling the hollow portion with a resin foam, a lid having more excellent heat insulating properties can be obtained. As the resin foam, those which can be reacted and cured as they are by injecting the raw material into the hollow portion can be used, and a foamed phenol resin, a foamed silicone resin, and the like can be used. As this resin foam, a rigid polyurethane foam which can easily inject the raw material into the hollow portion and has excellent heat insulating properties is particularly preferable.

This rigid polyurethane foam generally comprises a polyisocyanate and a polyol as main raw materials. A catalyst, a foaming agent, a foam stabilizer, and other auxiliaries are added to this main raw material, and these are mixed, stirred, and then injected into a hollow portion, and if necessary, can be produced by heating. . As the polyisocyanate, those conventionally used in the production of rigid polyurethane foams such as toluene diisocyanate, diphenylmethane diisocyanate, and modified products or mixtures thereof can be used without particular limitation.

As the polyol, those conventionally used in the production of rigid polyurethane foam can be used without any particular limitation. Examples of such a polyol include an ethylenediamine-based polyether polyol, an aromatic polyether polyol, a shoe-closed-based polyether polyol, a sorbitol-based polyether polyol, a toluenediamine-based polyether polyol, and an aromatic polyester polyol. These may use only one kind,
Two or more can be used in combination.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to examples. In these embodiments, the case where a regenerator is used will be described. However, a lid having the same structure can be used when a regenerator is used.

FIG. 1 is a sectional view of one embodiment of a lid for a heat insulating container according to the first invention. In FIG. 1, a frame 1 is made of high-density polyethylene and is a hollow body. The outer dimension of the plane of the frame 1 is 370 × 300 mm, and the inner dimension is 230 × 1
60 mm, and the width of the frame 1 is 70 mm. Also,
The thickness of the mounting portion 11 on the container body is 15 mm, the thickness of the drop portion 12 is 25 mm, and the total thickness of the frame 1 is 40 mm.
mm. In addition, the thickness of the molding wall is 2.5 mm. The thickness of the drop portion 12, the angle of the inclined surface, and the position at which the inclined surface is provided may be adjusted to the shape of the fitting portion provided on the upper surface of the container body.

The frame 1 having the hollow portion 13 can be easily formed by blow molding, die slide injection molding, or the like. A support portion 14 protruding inward is provided on the inner peripheral edge of the lower surface of the frame 1 so as to support the cold storage agent container 2 fitted therein. The support part 14 can be integrally formed with other parts of the frame 1. In order to suppress heat conduction from the gap between the inner surface of the frame 1 and the outer surface of the cold storage container 2, the support portions 14 may be provided on all the inner side edges of the lower surface of the frame 1. preferable. However, it may be provided on a part of the side edge as long as it has sufficient strength to support the cold storage agent container 2.

FIG. 2 is a sectional view of another embodiment of the heat insulating container lid according to the first invention. Also in FIG. 2, the frame 1 is a hollow body. The inner side surface is inclined inward from the upper surface to the lower surface. That is, the dimension between the opposing inner surfaces is smaller at the lower side. Therefore, the inner dimension of the lower surface side of the frame 1 is 190 × 120 mm.
The dimensions of the other parts are the same as those of the lid of FIG. In the lid of FIG. 2, the cold storage agent container 2 having an outer surface shape corresponding to the inner surface shape of the frame body 1 is fitted, so that the cold storage agent is not provided on the inner peripheral edge of the lower surface of the frame body 1. The container 2 can be sufficiently supported by the frame 1. 1 and 2, air is sealed in the hollow portion 13. Although the heat insulating property is higher than the case where the frame body 1 is a solid body as it is, the heat insulating property of the lid can be further enhanced by injecting the hard polyurethane foam raw material into the hollow portion 13 and reacting and curing. .

FIG. 3 is a sectional view of an embodiment of a lid for a heat insulating container according to the second invention. In FIG. 3, the frame 1 is a hollow body, but has an opening in the inner part of the lower surface over the entire length of the frame 1. Such a hollow body can be easily formed by a general injection molding method instead of a specific molding method such as a die slide injection molding method. In this lid, the hollow portion 13 is formed by the frame 1 and the metal molded body 4 by placing the cold storage agent container 2 in the opening of the frame 1 and fitting the metal molded body 4 for supporting. Is done. Further, the metal molded body 4 forms the dropping portion 12 of the lid. Then, the cool storage agent container 2 is fitted into a space formed by the inner side surface of the frame 1 and the upper surface of the metal forming plate 4.

The metal molded body 4 is made of stainless steel, has an outer dimension of 330 × 260 mm and a thickness of 0.1 mm.
5 mm. The dimensions of other parts are the same as those of the lid of FIG. In this lid, the metal forming plate 4 may be merely fitted into the frame 1, but the required portions of these contact portions may be joined with an adhesive. The metal forming plate 4 has excellent heat conductivity and good heat conduction with the inside of the container. In the lid of FIG. 3, the hollow portion 13 is filled with the rigid polyurethane foam 5, so that the heat insulation of the side edge of the lid is further enhanced. The regenerator agent container 2 stores a regenerator agent 3 of about half of the internal volume, as in FIGS.

The regenerator container 2 is made of high-density polyethylene and can be easily formed by a blow molding method or the like. The outer dimensions of the cool storage agent container 2 are substantially the same as the dimensions of the inner space of the frame 1, and the thickness of the molded wall is 1.5 mm. The regenerator 3 stored in the regenerator container 2 includes
An appropriate amount may be used depending on the required cooling temperature and time. In addition, the cold storage agent 3 in the cold storage container 2
Is not particularly limited as long as the cold storage container 2 does not crack due to expansion of the cold storage agent 3 during freezing. However, as shown in FIGS. 1 and 2, in these embodiments, the storage amount of the regenerator 3 is half of the internal volume of the regenerator container 2, and thus, By providing the space, the heat insulation with the outside is enhanced, and it is possible to keep the cold more efficiently.

The regenerator container 2 may be entirely fitted into the frame body 1 as shown in FIGS. 1, 2 and 3, but as shown in FIG. A structure in which a flat plate-shaped protrusion 21 is provided on the outer edge of the frame may be adopted. With such a regenerator container 2, the regenerator container 2 can be mounted on the upper surface of the frame 1 without the support 14 provided on the frame 1 in FIG. 1 or the metal forming plate 4 in FIG. 3. The heat storage container can be placed and supported, and can be used as a lid for a heat insulating container using the cold storage agent container 2 having such a structure.

Further, the cold storage agent container 2 is provided with a plate-like projection 21 as shown in FIG.
With such a structure, the heat insulation in the thickness direction of the container can be further improved. In the regenerator container 2 shown in FIG. 5, the heat insulation of the container can be sufficiently enhanced by the upper space 22. For this reason, in the lower space 23, 85% or less, particularly 90% or less of the volume of the cold storage agent 3 is stored in the lower space 23 within a range in which the cold storage agent container 2 does not crack due to expansion during freezing. There is no problem if you let them. The cold storage agent container 2 having a plurality of spaces as described above can be easily obtained by mounting an intermediate product of a preformed cold storage agent container in a molding die and performing blow molding.

In the regenerator container 2 shown in FIG. 6, the heat insulation in the thickness direction of the container can be improved by increasing the thickness of the upper forming wall 24. In the case of the cold storage agent container 2 as well, it is not necessary to particularly reduce the storage amount of the cold storage agent 3, and the cold storage agent 3 can store 85% or less, particularly 90% or less of the volume of the internal space. Such a hollow molded body in which the upper and lower molding walls have different thicknesses can be easily molded by die slide injection molding or the like. The thickness of the upper formed wall 24 depends on the thickness of the lower formed wall 25, but is 2 to 10 times, preferably 3 to 7 times the thickness of the lower formed wall 25.

It should be noted that the present invention is not limited to the specific embodiments described above, but can be variously modified within the scope of the present invention depending on the purpose and application. For example, in the lids shown in FIGS. 1 and 2, it is not always necessary to provide a cutout portion in the frame body, and a cutout portion for fitting may be provided on the upper surface of the side wall of the container body. Further, the frame body may be provided with a cut-out portion and further provided with the above-described cut-out portion. Further, a concave portion is provided at an appropriate position on the inner wall surface of the frame body, and a convex portion is provided at a corresponding position on the outer surface of the cold storage agent container or the like. It is also possible to adopt a structure that is more securely fixed in the body. 4, 5 and 6 can be used as they are as a lid for a heat insulating container.

[0027]

According to the lid for the heat insulating container of the first and second inventions, the regenerator container or the regenerator container is easily removed from the frame, only the regenerator container is cooled, and the regenerator is frozen.
Alternatively, the heat storage agent container can be heated to melt the heat storage agent. In addition, if a container having a specific structure according to the third, fourth, and fifth aspects of the present invention is used as the cold storage agent container or the like, the cold storage agent container or the like can be more stably mounted on the frame, or can be more thermally insulated. It is possible to obtain a lid having excellent properties.

Further, by forming the frame body as a hollow body instead of a solid body, a lid having higher heat insulation can be obtained, and the hollow portion of the frame body is filled with a resin foam such as a rigid polyurethane foam. If this is the case, the heat insulation of the lid can be further improved. In addition, in the case of the lid for a heat insulating container of the present invention, even when cleaning and cleaning are required, the cold storage agent container and the like can be removed from the frame and the like, and the work can be easily performed.

[Brief description of the drawings]

FIG. 1 is a sectional view of an example of a lid for a heat insulating container in an embodiment.

FIG. 2 is a cross-sectional view of another example of the heat insulating container lid in the embodiment.

FIG. 3 is a cross-sectional view of still another example of the lid for the heat insulating container in the embodiment.

FIG. 4 is a cross-sectional view of a cold storage container provided with a protruding portion on the outer periphery of the upper surface.

FIG. 5 is a cross-sectional view of a cold storage container having both an upper space for heat insulation and a lower space for storing a cold storage agent.

FIG. 6 is a cross-sectional view of a cold storage container in which the thickness of an upper molded wall is increased to improve heat insulation.

FIG. 7 (a) is a cross-sectional view of an example of a conventional lid for a heat insulating container containing a regenerator. (B) is sectional drawing of a heat insulation container main body.

FIG. 8 is a sectional view of another example of a conventional lid for a heat insulating container.

[Explanation of symbols]

1; frame body, 11; mounting part, 12; drop-in part, 13;
Hollow portion, 14; support portion, 2; cold storage container, 21; flat protrusion, 22; upper space, 23; lower space, 24; upper formed wall, 25; lower formed wall, 3; Metal molded plate, 5; rigid polyurethane foam, 6; lid, 61;
Lid body, 7; Insulated container body, 71; Resin container, 7
2; metal container, 8;

Claims (5)

[Claims] 1. A frame comprising a frame constituting a side edge portion of a lid, and a regenerator container or a regenerator container removably fitted in a space formed by an inner surface of the frame. And a lid for a heat insulating container. 2. A frame forming a side edge of the lid, and an end edge of which is engaged with the frame at an inner side edge near a lower surface of the frame to form a metal forming plate. And a regenerator container or a regenerator container removably fitted in a space defined by an inner surface of the frame and an upper surface of the metal forming plate. 3. The lid for a heat insulating container according to claim 1, wherein a flat projection is provided outside the vicinity of the upper surface of the cold storage agent container or the heat storage agent container. 4. The cold storage agent container or the heat storage agent container has two upper and lower hollow portions separated by a molding wall, and the cold storage agent or the heat storage agent is stored only in the lower hollow portion. Item 4. The lid for a heat insulating container according to any one of Items 1 to 3. 5. The method according to claim 1, wherein the thickness of the upper molded wall of the cold storage agent container or the heat storage agent container is 2 to 10 times the thickness of the lower molded wall. A lid for an insulated container as described in the above.