WO2019009247A1

WO2019009247A1 - Heat-insulating container

Info

Publication number: WO2019009247A1
Application number: PCT/JP2018/025072
Authority: WO
Inventors: 拓也三谷
Original assignee: 大日本印刷株式会社
Priority date: 2017-07-04
Filing date: 2018-07-02
Publication date: 2019-01-10
Also published as: JP7162416B2; JP2019014489A

Abstract

A heat-insulating container comprising a vacuum heat-insulating material and changeable between an assembled state and a disassembled state. The heat-insulating container has a top heat-insulating panel, a bottom heat-insulating panel, and multiple lateral heat-insulating panels comprising a rear heat-insulating panel, a left heat-insulating panel, and a front heat-insulating panel, wherein in the assembled state, the top heat-insulating panel, the bottom heat-insulating panel, and the multiple lateral heat-insulating panels surround and thus form a heat-insulated space, and in the disassembled state, the heat-insulated space is not formed. At least four heat-insulating panels among the top heat-insulating panel, the bottom heat-insulating panel, and the multiple lateral heat-insulating panels have a vacuum heat-insulating member including the vacuum heat-insulating material. In the assembled state, ventilation is performed 0.1 times per hour.

Description

Heat insulation container

The present disclosure relates to a thermally insulated container.

The vacuum heat insulating material has a core material and an exterior material, and while the core material is disposed inside the bag constituted by the exterior material, the vacuum material is maintained in a vacuum state where the pressure is lower than atmospheric pressure. . Since the heat convection inside the bag is suppressed, the vacuum heat insulating material can exhibit good heat insulation. Since the vacuum heat insulating material has a higher heat insulating property per unit thickness than a general foam heat insulating material, the thickness of the heat insulating material can be reduced while securing desired heat insulating property. Therefore, it becomes possible to achieve space saving and weight reduction of a heat insulation container, for example by using a vacuum heat insulating material for a heat insulation container.

The heat insulation container which can change the assembly state and the disassembly state can be miniaturized by disassembling the insulation container in the assembled state when not in use. For example, Patent Documents 1 to 3 disclose a heat insulating container using a vacuum heat insulating material, in which the assembled state and the disassembled state can be changed.

JP, 2006-123914, A JP 2008-68871 A JP, 2015-199527, A

An object of the present disclosure is to provide a thermally insulated container which is good in thermal insulation during use and can be miniaturized when not in use.

In the present disclosure, the heat insulation container is capable of changing an assembled state and a disassembled state, and is a heat insulation container using a vacuum heat insulating material, wherein the heat insulation container includes a top heat insulation panel, a bottom heat insulation panel, and a right heat insulation panel. A plurality of side thermal insulation panels having a rear thermal insulation panel, a left thermal insulation panel, and a front thermal insulation panel, the assembled state being surrounded by the top thermal insulation panel, the bottom thermal insulation panel, and the plurality of side thermal insulation panels The heat insulation space is formed, and the decomposition state is a state where the heat insulation space is not formed, and at least four of the top surface heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels. Insulating panels are provided with a vacuum insulating member including the above-described vacuum insulating material, and in the above-mentioned assembled state, the number of ventilation times is 0.1 times / hr or less. To.

In the present disclosure, the heat insulation container is capable of changing an assembled state and a disassembled state, and is a heat insulation container using a vacuum heat insulating material, wherein the heat insulation container includes a top heat insulation panel, a bottom heat insulation panel, and a right heat insulation panel. A plurality of side thermal insulation panels having a rear thermal insulation panel, a left thermal insulation panel, and a front thermal insulation panel, the assembled state being surrounded by the top thermal insulation panel, the bottom thermal insulation panel, and the plurality of side thermal insulation panels The heat insulation space is formed, and the decomposition state is a state where the heat insulation space is not formed, and at least four of the top surface heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels. Insulating panels of the present invention have a vacuum insulating member including the above-mentioned vacuum insulating material, and in the above-mentioned assembled state, the number of ventilations is the cold storage time in the common logarithm of the number of ventilations Rate of change is less than or equal to the value to be -1, provides thermal insulation vessel.

The heat insulation container of the present disclosure has the effect of being excellent in heat insulation during use and capable of being miniaturized when not in use.

It is a schematic perspective view which illustrates the heat insulation container of this indication. It is a schematic diagram explaining the junctional part of two side heat insulation panels. It is a schematic sectional drawing which illustrates the vacuum heat insulating material in this indication. It is a schematic sectional view which illustrates the vacuum insulation member in this indication. It is a schematic sectional view which illustrates the vacuum insulation panel in this indication. It is a schematic sectional view which illustrates the vacuum insulation member in this indication. It is a schematic diagram explaining the junctional part of two vacuum heat insulation panels. It is a schematic perspective view which illustrates the heat insulation container of this indication. FIG. 2 is a schematic perspective view illustrating the disassembled heat insulation container of the present disclosure. It is a schematic perspective view which illustrates the heat insulation container of this indication. It is a schematic perspective view which illustrates the heat insulation container of this indication. It is a schematic perspective view which illustrates the heat insulation container of this indication. It is a graph which shows the relationship between the cooling time and the ventilation frequency by simulation. It is a graph which shows the relationship between the cooling time and the ventilation frequency by simulation. It is a graph which shows the change rate of the cooling time in the common logarithm of the ventilation frequency by simulation. It is a graph which shows the change rate of the cooling time in the common logarithm of the ventilation frequency by simulation.

A. Insulating container of the present disclosure Hereinafter, the insulating container of the present disclosure will be described with reference to the drawings and the like. In addition, each figure shown below is shown typically. Therefore, the size and shape of each part are appropriately exaggerated to facilitate understanding. In each drawing, hatching indicating a cross section of a member is appropriately omitted. Numerical values and material names such as dimensions of each member described in the present specification are merely examples as an embodiment, and the present invention is not limited thereto, and can be appropriately selected and used. In the present specification, terms specifying shape and geometrical conditions, for example, terms such as parallel, orthogonal, and vertical, include, in addition to their strict meanings, substantially the same states.

FIG. 1 is a schematic perspective view illustrating the heat insulation container of the present disclosure. The heat insulation container 100 shown in FIG. 1 includes a top surface heat insulation panel 160, a bottom heat insulation panel 170, a plurality of side heat insulation panels 110, and a pallet 500 having claw holes 501. The plurality of side thermal insulation panels 110 are a right thermal insulation panel 120, a left thermal insulation panel 130, a rear thermal insulation panel 140, and a front thermal insulation panel 150. The top thermal insulation panel 160, the bottom thermal insulation panel 170, and the plurality of side thermal insulation panels 110 are vacuum thermal insulation panels having a vacuum thermal insulation member including a vacuum thermal insulation material. The right heat insulation panel 120 and the left heat insulation panel 130 each include a vertical frame 310 and a horizontal frame 320. The vertical frame 310 and the horizontal frame 320 constitute the entire frame. Although not shown, the rear heat insulation panel 140 and the front heat insulation panel 150 are similarly provided with a vertical frame 310 and a horizontal frame 320.

Further, the front heat insulation panel 150 and the top heat insulation panel 160 have a structure that can be partially opened and closed, and FIG. 1 shows a partially opened state. The heat insulation container 100 is in the assembled state of a square pillar structure by closing the front heat insulation panel 150 and the top heat insulation panel 160, and the top heat insulation panel 160, the bottom heat insulation panel 170, and a plurality of side heat insulation panels. It is possible to form the heat insulation space enclosed by 110 inside the container. Moreover, in the assembled state, the heat insulation container 100 shown in FIG. 1 has a ventilation frequency equal to or less than a specific value.

In the heat insulation container 100 shown in FIG. 1, the six heat insulation panels of the top heat insulation panel 160, the bottom heat insulation panel 170, the right heat insulation panel 120, the left heat insulation panel 130, the back heat insulation panel 140, and the front heat insulation panel 150 It is a vacuum insulation panel which has a vacuum insulation member containing heat insulation. However, in the heat insulation container of the present disclosure, from the viewpoint of achieving both the heat insulation performance of the heat insulation container and the convenience of the heat insulation container, all of the heat insulation panels may not be vacuum heat insulation panels. And at least four of the plurality of side thermal insulation panels may be vacuum thermal insulation panels. Specifically, the bottom heat insulation panel may not include the vacuum heat insulation material in order to prevent the vacuum heat insulation material from being damaged by the weight of the load, in which case, for example, the top heat insulation panel, the right heat insulation The five thermal insulation panels, the panel, the left thermal insulation panel, the rear thermal insulation panel, and the front thermal insulation panel, may be vacuum thermal insulation panels. Moreover, in order to prevent the risk of breakage of the vacuum heat insulating material by opening and closing, the heat insulating panel having an openable and closable structure may not include the vacuum heat insulating material. In that case, for example, a bottom heat insulating panel and a right heat insulating panel , The left thermal insulation panel, and the rear thermal insulation panel are the vacuum thermal insulation panels, and the top thermal insulation panel and the front thermal insulation panel are the thermal insulation panels that have an openable and closable structure and do not contain the vacuum thermal insulation material. May be

According to the present disclosure, the assembled state and the disassembled state can be changed, a vacuum heat insulating material is used, and the number of ventilation times is equal to or less than a specific value. It can be an insulated container that can sometimes be miniaturized. Details will be described below.

When a vacuum heat insulating material is used as the heat insulating material of the heat insulating container capable of changing the assembled state and the disassembled state, there arises a problem that the airtightness of the heat insulating container tends to be reduced due to the property unique to the vacuum heat insulating material. This point will be described with reference to FIG. FIG. 2 is a schematic view for explaining the joint portion between the two side heat insulation panels, for example, a view of the joint portion between the back heat insulation panel 140 and the right side heat insulation panel 120 from the top heat insulation panel 160 side in FIG. Equivalent to.

Two side

heat insulation panels

110X and 110Y shown in FIG. 2 respectively have a heat insulation member 110A, an adhesive layer 334, and a protection member 110B in this order. Furthermore, each heat insulating member 110A has a vacuum heat insulating material as the first heat insulating material 331 and, for example, a foamed heat insulating material as the second heat insulating material 332. Further, the two side

heat insulating panels

110X and 110Y are joined by the respective protective members 110B being fitted to the vertical frame 310, and the respective heat insulating members 110A are in contact in the region X.

The vacuum heat insulating material used as the first heat insulating material 331 has a heat insulating property per unit thickness that is about 5 times to about 10 times higher than that of a general foam heat insulating material, so the thickness of the heat insulating material is significantly reduced. Also, it has the property that the desired heat insulation can be obtained. However, when the thickness of the heat insulating material is significantly reduced, the contact area between the end face of the side heat insulation panel 110X and the main surface of the side heat insulation panel 110Y is also significantly reduced in the region X of FIG. The air tightness of the

Further, the vacuum heat insulating material used as the first heat insulating material 331 has a property that the processability is low because it is necessary to keep the inside in a vacuum state in which the pressure is lower than the atmospheric pressure. Also, for example, in the case of a foamed heat insulating material, even when a part of the foamed heat insulating material is broken, the decrease in the heat insulating property is limited to the broken part, but in the vacuum heat insulating material, a part of the vacuum heat insulating material is If it breaks, the heat insulation of the whole vacuum heat insulating material will fall. Thus, the vacuum heat insulating material has the property that the performance deterioration at the time of breakage is large. Therefore, from the viewpoint of processability improvement and damage prevention, as shown in FIG. 2, the second heat insulating material (foamed heat insulating material) 332 may be used together with the first heat insulating material (vacuum heat insulating material) 331. However, when a plurality of heat insulating materials are stacked, the contact surface between the end face of the first heat insulating material (vacuum heat insulating material) 331 and the main surface of the second heat insulating material (foamed heat insulating material) 332 in the region X of FIG. There are two contact surfaces, the contact surface between the end face of the second heat insulating material (foamed heat insulating material) 332 and the main surface of the second heat insulating material (foamed heat insulating material) 332. As a result, the airtightness of the heat insulating container decreases. It becomes easy to do.

As described above, when a vacuum heat insulating material is used as the heat insulating material of the heat insulating container capable of changing the assembled state and the disassembled state, properties peculiar to the vacuum heat insulating material (thin thickness, low workability, and performance deterioration at breakage) Because of the large nature of), the airtightness of the heat insulation container tends to be reduced. Therefore, it is possible to change the assembled state and the disassembled state, and in the case of the heat insulating container using a vacuum heat insulating material, the management of air tightness becomes important. However, in the insulation container which can change the assembly state and the disassembly state, and in the insulation container using a vacuum insulation material, to what extent does the airtightness of the insulation container affect the insulation of the whole insulation container? The knowledge about this was not known conventionally. In the present disclosure, when the relationship between air tightness (the number of ventilations) and the cooling time is examined in detail, by setting the number of ventilations to a predetermined value or less, the thermal insulation property of the heat insulation container decreases due to the airtightness. Was found to be able to suppress

Further, the above-described technical concept of air tightness management can change the assembled state and the disassembled state, and is closely related to the problems unique to the heat insulating container using a vacuum heat insulating material. For example, in the case of a heat insulating container which does not need to be disassembled, since it is not necessary to form a decomposable joint in the first place, even when a vacuum heat insulating material is used, the problem of air tightness due to decomposition does not occur. On the other hand, even in the case of a heat insulation container capable of changing the assembled state and the disassembly state, in the case of a heat insulation container using a general foam insulation without using a vacuum insulation, the general foam insulation is sufficiently thick Since the processability is higher than that of a vacuum heat insulating material, the problem of air tightness due to the heat insulating material hardly occurs. Moreover, in the case of a heat insulation container using a general foam heat insulating material, since the performance of the heat insulating material is lower than that of the vacuum heat insulating material, it is more appropriate to improve the heat insulating material performance to improve the heat insulation. There are many cases. However, in the case of a heat insulating container using a vacuum heat insulating material, since the performance of the heat insulating material is sufficiently excellent, it is important to control air tightness to improve the heat insulating property. Thus, the technical concept of airtightness management can change the assembly state and the disassembly state, and is closely related to the problems unique to the thermal insulation container using a vacuum insulation material.
Hereinafter, the heat insulation container of this indication is demonstrated in more detail.

1. The ventilation frequency of the heat insulation container of the present disclosure is preferably 0.1 times / hr or less in the assembled state. When the ventilation frequency is 0.1 times / hr or less, the influence of the heat transfer through the gap between the heat insulation panels on the cooling time is the effect of the heat transfer through the heat insulation panels on the heat insulation time This is because the cooling time is stable, which is sufficiently smaller than that of the conventional art. In other words, the fact that the ventilation frequency is 0.1 times / hr or less suppresses the decrease in the heat insulation of the heat insulation container due to the decrease in air tightness due to the ability to change the assembly state and the disassembly state. It is important to fully demonstrate the heat insulation performance of the heat insulation container using the heat insulation material. The ventilation frequency is determined as follows.

That is, according to JIS A 1406: 1974 (indoor ventilation measurement method (carbon dioxide gas method)), the ventilation frequency (times / hr) of the heat insulation container is the ventilation volume per hour (also referred to as air supply, m) ³ / hr) is measured, and it calculates | requires by dividing the ventilation volume Q by the internal volume of the heat insulation container. For the ventilation volume, carbon dioxide gas is released into the heat insulation container using a gas cylinder or vaporized dry ice, the carbon dioxide gas concentration is measured, and the formula (1) (Seidel's formula) described in 3.1 of the above JIS standard. It asks by). The carbon dioxide gas concentration is measured using the infrared gas analyzer method described in 2.1 (5) of the above JIS standard, and the measurement points are 3 to 5 points different in height in the heat insulation container, and Let the average value be the carbon dioxide concentration. Further, based on the description in the above-mentioned JIS Standard 2.2, the atmosphere in the heat insulation container is agitated using a small fan so that the concentration distribution becomes uniform at the time of the first measurement of carbon dioxide gas concentration. “Concentration distribution is uniform” means that the carbon dioxide concentration at each measurement point is within ± 10% of the average value, and the atmosphere in the heat insulation container is agitated so as to obtain this state. Further, the carbon dioxide gas concentration at the time of the first measurement is adjusted to be 5000 ppm or more and 10000 ppm or less. Furthermore, the measurement of the ventilation volume is performed with no temperature difference between the inside and the outside of the heat insulation container and in a windless state. In addition, it is preferable to perform the measurement of the ventilation volume several times (for example, 5 times and 10 times or less), and to obtain | require as an average value.

Further, the ventilation frequency of the heat insulation container of the present disclosure is preferably equal to or less than a value at which the rate of change of cold storage time in the common logarithm of the ventilation frequency is -1 in the assembled state. When the ventilation frequency is less than or equal to a value at which the change rate of the cooling time in the common logarithm of the ventilation frequency is -1 or less, the heat insulating performance of the heat insulating panel can be sufficiently exhibited. In other words, it is important that the ventilation frequency is less than or equal to a value at which the change rate of the cooling time in the common logarithm of the ventilation frequency is -1, in order to fully demonstrate the heat insulation performance of the heat insulation container using the vacuum heat insulating material. . The change rate of the cooling time in the common logarithm of the ventilation frequency is determined as follows.

That is, the cold storage time is 8 ° C. or less in an atmosphere of 35 ° C. outside temperature with a sample (2 L PET water containing 2 ° C. water corresponding to 10% of the inner volume of the thermal insulation container) housed inside the heat insulation container. It is evaluated by the time that can be kept at (Holding time). First, the heat insulation container is allowed to stand in an atmosphere at a temperature of 35 ° C., and the temperature inside and outside the heat insulation container is set to 35 ° C. Next, as a sample to be stored, a PET container containing water at 2 ° C. corresponding to 10% of the internal volume of the heat insulation container is prepared. In addition, a commercially available 2 L PET container is used as a PET container. The sample is then placed in the center of the bottom insulation panel of the insulation vessel. A hole is made in the cap portion of the PET container, and a thermocouple or a resistance temperature sensor of about half the height of the PET container is introduced from the hole. This measures the temperature of the central portion of the PET container. Next, seal the heat insulation container. In addition, a cold storage agent is not used.

In this way, the cooling time can be determined. On the other hand, when the heat insulation panel which has an openable and closable structure is used, the ventilation frequency can be experimentally adjusted by adjusting the degree of opening and closing to an intentional non-normal state. Even when the heat insulation panel having an openable / closable structure is not used, for example, the degree of bonding of the heat insulation panels is intentionally non-regular by, for example, sandwiching a hollow pipe inside the heat insulation panels By adjusting to the condition, the ventilation frequency can be adjusted experimentally. Therefore, the relationship between the ventilation frequency and the cooling time can be obtained by obtaining the cooling time each time for a plurality of experimentally adjusted ventilation frequencies. It is preferable to measure a plurality of ventilation frequency, for example, in the range of 0.01 frequency / hr or more and 1 time / hr or less and generally without bias on the common logarithmic axis, and the measurement points of the plurality of ventilation frequency are For example, it may be five or more, and may be ten or more.

After the relationship between the ventilation frequency and the cooling time is obtained, the rate of change of the cooling time in the common logarithm of the ventilation frequency is determined. For example, a semilogarithmic graph is created in which the ventilation frequency is plotted on the logarithmic axis of the horizontal axis, and the cold storage time is plotted on the normal axis of the vertical axis, and the slope of the semilogarithmic graph is determined.

On the other hand, in the assembled state, the ventilation frequency of the heat insulation container of the present disclosure is preferably 0.02 times / hr or more. By allowing a ventilation frequency of 0.02 times / hr or more, it is possible to make the joint between the heat insulation panels easy to join or remove, or to make it possible to open and close the heat insulation panels. It is.

2. Insulation Container Configuration The insulation container of the present disclosure has a top insulation panel, a bottom insulation panel, and a plurality of side insulation panels. Furthermore, the top heat insulation panel, the bottom heat insulation panel, and at least four heat insulation panels of the plurality of side heat insulation panels are vacuum heat insulation panels having a vacuum heat insulating member including a vacuum heat insulating material. By increasing the number of vacuum insulation panels, the insulation performance of the insulation container is improved. By reducing the number of vacuum insulation panels, it is possible to reduce the risk that the vacuum insulation material breaks and the insulation performance of the insulation container falls sharply.

In addition, as thermal insulation panels other than a vacuum thermal insulation panel, the thermal insulation panel which has a thermal insulation member which does not contain a vacuum thermal insulation but contains at least one of a porous thermal insulation and a fiber thermal insulation is mentioned, for example. In addition, a porous heat insulating material and a fiber heat insulating material are heat insulating materials which have many space | gaps by a porous structure or a fiber structure in the inside which is atmospheric pressure state. In the heat insulation container of the present disclosure, the heat transmission coefficient of heat insulation panels other than the vacuum heat insulation panel can be, for example, 3 W / m ² K or less, and may be 2 W / m ² K or less.

(1) Vacuum heat insulation panel A vacuum heat insulation panel is a heat insulation panel which has a vacuum heat insulation member containing a vacuum heat insulating material. The vacuum heat insulating member may be a member having only a vacuum heat insulating material as a heat insulating material, or may be a member having a vacuum heat insulating material and another heat insulating material. In the present disclosure, the vacuum heat insulating material may be referred to as a first heat insulating material, and a heat insulating material other than the vacuum heat insulating material may be referred to as a second heat insulating material.

(I) Vacuum Heat Insulating Material The vacuum heat insulating material in the present disclosure has a core material and an exterior material that wraps the core material. FIG. 3 is a schematic cross-sectional view illustrating a vacuum heat insulating material in the present disclosure. As shown to Fig.3 (a), the 1st heat insulating material 331 which is a vacuum heat insulating material has the core material 331a and the exterior material 331b which has gas-barrier property. The inside of the exterior material 331 b is in a reduced pressure state. FIG.3 (b) is another example of a vacuum heat insulating material. Although a void is formed at both ends inside the first heat insulating material 331 which is a vacuum heat insulating material in FIG. 3 (a), no void is formed in FIG. 3 (b). The air gap may or may not be formed due to the difference in the method of manufacturing the first heat insulating material 331.

As a core material, a powder, a porous body, a fiber body etc. can be used, for example. The above powder may be inorganic powder or organic powder, and specifically, dry silica, wet silica, aggregated silica powder, conductive powder, calcium carbonate powder, perlite , Clay, talc and the like. As said porous body, a urethane foam, a styrene foam, a phenol foam etc. are mentioned, for example. The fiber body may be an inorganic fiber or an organic fiber, and examples of the inorganic fiber include glass fibers such as glass wool and glass fibers, alumina fibers, silica alumina fibers, silica fibers, ceramic fibers, rock wool and the like.

The exterior material is a member that covers the outer periphery of the core material, and examples thereof include a flexible sheet having a thermal adhesion layer and a gas barrier layer in this order from the core material side. Examples of the gas barrier layer include a metal foil and a vapor deposition sheet having a vapor deposition layer on one side of a resin sheet. As metal foil, aluminum is mentioned, for example. As a vapor deposition layer, aluminum, an aluminum oxide, a silicon oxide is mentioned, for example. A well-known resin sheet can be used as a resin sheet.

Oxygen permeability of the outer package, for example ^0.5cc · m -2 · ^{day -1} may be less, may be not more than ^0.1cc · m -2 · ^{day -1.} Further, the water vapor permeability of the outer package, for example ^0.2cc · m -2 · ^{day -1} may be less, may be not more than ^0.1cc · m -2 · ^{day -1.} The internal vacuum degree of the vacuum heat insulating material may be, for example, 5 Pa or less. The initial thermal conductivity of the vacuum heat insulating material is, for example, 15 mW · m ⁻¹ · K ⁻¹ or less in a 25 ° C. environment, and may be 10 mW · m ⁻¹ · K ⁻¹ or less, 5 mW · m ⁻¹ ^-It may be K ^-1 or less.

(Ii) Vacuum Heat Insulating Member The vacuum heat insulating member in the present disclosure may be a member having only a vacuum heat insulating material (first heat insulating material) as a heat insulating material, a vacuum heat insulating material (first heat insulating material), and the like. It may be a member having a heat insulating material (second heat insulating material). As described above, the vacuum heat insulating material (first heat insulating material) is greatly deteriorated in performance at the time of breakage, but when used together with other heat insulating materials (second heat insulating material), the vacuum heat insulating material (first heat insulating material) It is possible to suppress the decrease in heat insulation of the heat insulation panel at the time of breakage.

FIG. 4 is a schematic cross-sectional view illustrating a vacuum insulation member in the present disclosure. As shown in FIG. 4A, the vacuum heat insulating member 350A has a first heat insulating material 331, which is a vacuum heat insulating material, and a second heat insulating material 332 located on one principal surface side of the first heat insulating material 331. It may be done. For example, the first heat insulating material 331 can be set in a mold, and then the first heat insulating material 331 and the second heat insulating material 332 can be integrally formed by injection molding. On the other hand, although not shown, an adhesive layer may be provided between the first heat insulating material 331 and the second heat insulating material 332 to bond the two.

As a 2nd heat insulating material, porous heat insulating materials, such as a foamed heat insulating material, and a fiber heat insulating material are mentioned. As the porous heat insulating material and the fiber heat insulating material, for example, foamed polyethylene, foamed polypropylene, foamed polystyrene, foamed polyurethane, foamed plastic based heat insulating material such as foamed polyphenol, glass wool, glass fiber, rock wool, cellulose fiber, insulation board etc. Fiber-based thermal insulation materials, natural thermal insulation materials such as wool and carbonized cork, and the like.

Moreover, although the vacuum heat insulation member 350A shown to Fig.4 (a) does not have the 2nd heat insulation material 332 in the end surface of the 1st heat insulation material 331, as shown in FIG.4 (b), the vacuum heat insulation member 350A is A second heat insulating material 332 may be provided to cover both end surfaces of the first heat insulating material 331. Although not shown, only one end face of the first heat insulating material 331 may be covered with the second heat insulating material 332. In addition, a part of the end face of the first heat insulating material 331 may be covered with the second heat insulating material 332, and the whole end face of the first heat insulating material 331 may be covered with the second heat insulating material 332 .

Further, the vacuum heat insulating member 350A shown in FIG. 4 (a) has the second heat insulating material 332 only on one main surface side of the first heat insulating material 331, but the second heat insulating material A heat insulating material 332 may be provided. Furthermore, as shown in FIG. 4C, the vacuum heat insulating member 350A may have a second heat insulating material 332 so as to cover the entire circumference of the first heat insulating material 331.

Furthermore, the vacuum heat insulating member in the present disclosure may have a heat shield sheet so as to cover the entire circumference of the first heat insulating material. For example, as shown in FIG. 4D, the vacuum heat insulating member 350A may have a heat shielding sheet 333 so as to cover the entire circumference of the first heat insulating material 331 and the second heat insulating material 332. In this case, a part of the periphery of the first heat insulating material 331 is covered with the heat shield sheet 333 via the second heat insulating material 332.

As a heat shielding sheet, the multilayer sheet containing metal foil, the vapor deposition sheet which has a vapor deposition layer in the single side | surface of a resin sheet is mentioned, for example. About the kind of metal foil and the kind of vapor deposition sheet, it is the same as that of the content mentioned above. By providing the heat shielding sheet, the heat insulating property of the heat insulating member is further improved. Furthermore, as described later, the airtightness of the heat insulation container can be improved.

(Iii) Protective Member The vacuum thermal insulation panel in the present disclosure is a thermal insulation panel having at least the above-described vacuum thermal insulation member, and may further have a protective member for protecting the vacuum thermal insulation member. FIG. 5 is a schematic cross-sectional view illustrating a vacuum insulation panel in the present disclosure. As shown in FIG. 5A, the vacuum heat insulation panel 350 may have a vacuum heat insulation member 350A, an adhesive layer 334, and a protection member 350B in this order. The vacuum heat insulation panel 350 shown in FIG. 5A has the second heat insulation member 332 on one main surface side of the first heat insulation material 331, and the protection member 350B on the other main surface side of the first heat insulation material 331. Have. On the other hand, as shown in FIG. 5B, the vacuum heat insulation panel 350 may have a protection member 350B so as to cover the entire circumference of the vacuum heat insulation member 350A. Although not shown, the vacuum heat insulation panel may have the above-mentioned heat shield sheet so as to cover, for example, the entire circumference of the protection member 350B shown in FIG. 5 (b).

As a protection member, organic polymer members, such as plywood, a foaming material, a resin board, an embossed resin sheet, paperboard, a ceramic member etc. are mentioned, for example. It is also possible to use, for example, plastic cardboard or cured wood as a lightweight, relatively rigid material. Or you may use the same thing as the 2nd heat insulating material mentioned above.

(Iv) Vacuum Insulating Panel The vacuum insulating panel in the present disclosure preferably has a low heat transmission coefficient, and can be, for example, 0.5 W / m ² K or less.

The heat transmission coefficient is a value representing the ease of heat transfer in the heat insulation panel, and the smaller the value, the higher the heat insulation. The heat transmission coefficient (U value) is expressed as follows.
Heat transmission coefficient (W / m ² K) = 1 / heat resistance value (m ² K / W) (1)
Thermal resistance (m ² K / W) = thickness (m) / thermal conductivity (W / mK) (2)

Here, the measuring method of the heat transmission coefficient in a heat insulation panel is demonstrated. For example, the heat resistance value of the heat insulation panel itself may be determined (first measurement method). In addition, for example, a heat insulation panel for test having the same layer configuration as the heat insulation panel to be measured, and a plane perpendicular to the thickness direction having a size of 30 cm × 30 cm or more is manufactured. The resistance value may be determined (second measurement method). Further, for example, the thermal conductivity of each member constituting the heat insulation panel to be measured may be measured, and the thermal resistance value of the total of each member may be determined from the thickness of each member and the thermal conductivity (third measurement Method). The thermal resistance value and the thermal conductivity are determined in accordance with JIS A1412-1,2,2. The temperature of the measurement environment is 20 ° C. or more and 25 ° C. or less. In addition, it is preferable to employ | adopt the 1st measuring method which is a direct measuring method first, and to employ | adopt the 2nd measuring method, when it is difficult to employ | adopt a 1st measuring method as a measuring method of a heat-transmittance In the case where it is difficult to adopt the second measurement method, it is preferable to adopt the third measurement method. In addition, when a heat insulation panel has several area | regions with which heat transmission coefficients differ, it is preferable to use the average heat transmission coefficient which considered the ratio which an area | region occupies.

The third measurement method is illustrated. For example, it is assumed that the vacuum insulation panel has a first insulation (vacuum insulation) and a second insulation (EPP: expanded polypropylene). When the thermal conductivity of the first heat insulating material (vacuum heat insulating material) is 0.003 (W / mK) and the thickness is 0.006 m, the heat resistance value is calculated from equation (2) according to 0.006 / 0. 003 = ² becomes ^(m 2 K / W). On the other hand, when the thermal conductivity of the second heat insulating material (EPP) is 0.04 (W / mK) and the thickness is 0.02 m, the thermal resistance value is 0.02 / 0. It becomes 04 = 1/2 (m ² K / W). Therefore, the heat transmission coefficient of the vacuum insulation panel having the first heat insulation material and the second heat insulation material is 1 / (2 + 1/2) = 0.4 (W / m ² K) according to the equation (1).

When the heat insulation container has a plurality of vacuum heat insulation panels, the average of the heat transmission coefficient of each vacuum heat insulation panel can be, for example, 0.5 W / m ² K or less. Moreover, the heat transmission coefficient of all the vacuum insulation panels can also be made into 0.5 W / m < ² > K or less, for example.

The vacuum insulation panel may have a means to improve the insulation of the insulation panel. For example, as shown to Fig.6 (a), it is preferable that the 1st heat insulation material 331 which is a vacuum heat insulation material is formed by one so that the whole area of a vacuum heat insulation member may be extended in the width direction. For example, when the heat insulation container is enlarged, one side of the heat insulation panel also becomes large, but even in such a case, it is preferable that one first heat insulation material 331 which is a vacuum heat insulation material is formed. As shown in FIG. 6A, when the width of the vacuum heat insulating member is W ₁ and the width of the first heat insulating material 331 is W ₂ , the value of W ₂ / W ₁ is, for example, 90% or more. Is preferred. The value of _{W 1} is preferably, for example, 600mm or more.

For example, as shown in Drawing 6 (b), when vacuum heat insulation member 350A has a plurality of 1st heat insulation materials 331 in the cross direction, vacuum heat insulation member 350A is a plurality of 1st heat insulation materials in plane view. The auxiliary heat insulating material 337 may be provided at a position corresponding to the gap portion α of 331. By increasing the thickness of the vacuum heat insulating member in the gap portion α, the heat insulating property of the vacuum heat insulating panel can be improved. Similarly, for example, as shown in FIG. 6C, when the vacuum heat insulating member 350A has a plurality of first heat insulating materials 331 in the width direction, the vacuum heat insulating member 350A has a plurality of first heat insulators in plan view. Another first heat insulating material 331 may be provided at a position corresponding to the gap portion α of the material 331. Since the other first heat insulating material 331 is located in the gap portion α, the heat insulating property of the vacuum heat insulating panel can be improved.

(2) Airtightness improvement means In the heat insulation container of this indication, it is preferable that the ventilation frequency in an assembly state is below predetermined value. The means for reducing the number of times of ventilation of the heat insulation container (means for improving the airtightness of the heat insulation container) is not particularly limited as long as the desired number of times of ventilation can be obtained, and any means can be adopted.

One example of the airtightness improving means is, for example, a means to improve the airtightness of the joint portion between two vacuum heat insulation panels. For example, as shown in FIG. 7 (a), in the two vacuum insulation panels to be joined, one of the vacuum insulation panel V ₁ is, so as to cover the end surface of the first insulation material 331 has a second heat insulating material 332, the other the vacuum insulation panel V ₂ has a second heat insulating material 332 so as to cover the main surface of the first insulation material 331, in the assembled state, first located at the end face of the first insulation material 331 in the vacuum insulation panel V ₁ a secondary heat insulating material 332, it is preferable that the second insulation material 332 located on the main surface of the first insulation material 331 in the vacuum insulation panel V ₂ are in contact. In FIG. 7A, in the region X, the airtightness in the region X is improved by bringing the second heat insulating materials 332 into contact with each other. In addition, the two 2nd heat insulating materials to contact may be a heat insulating material of the same material, and may be a heat insulating material of a different material.

For example, as shown in FIG. 7 (b), in the two vacuum insulation panels to be joined, one of the vacuum insulation panel V ₁ is, the end face of the first insulation material 331 (via a second heat insulating material 332) to cover in a thermal barrier sheet 333, the other vacuum insulation panel V _2, the main surface of the first insulation material 331 (via a second heat insulating material 332) has a heat shield sheet 333 so as to cover such, the assembly in the state, the heat insulating sheet 333 positioned on the end surface of the first insulation material 331 in the vacuum insulation panel V _1, and the heat insulating sheet 333 contacts located on the main surface of the first insulation material 331 in the vacuum insulation panel V ₂ Is preferred. In FIG. 7 (b), in the region X, by bringing the heat shielding sheets 333 into contact with each other, the airtightness in the region X is improved. The two heat shield sheets in contact with each other may be sheets of the same material or sheets of different materials. Further, although not shown, the heat shield sheet 333 and the second heat insulating material 332 may be in contact with each other in the region X.

For example, as shown in FIG. 7C, the heat insulating member includes a first surface fastener portion 335a, a second surface fastener portion 335b which can be coupled to the first surface fastener portion 335a, and a first surface. with a surface fastener member having a flexible member 335c connected to the fastener portion 335a, in the two vacuum insulation panels to be joined, a part of the flexible member 335c has an outer surface (insulation of the vacuum insulation panel V ₁ the space is secured at the opposite surface of) the second fastener portion 335b may be located on the opposite surface of) the outer surface (heat-insulating space of the vacuum insulation panel V _2. In FIG. 7 (c), the the outer surface of the vacuum insulation panel V _2, since the first surface fastener part 335a and the second surface fastener part 335b is capable of binding, thereby improving the airtightness in the region X.

For example, as shown in FIG. 7 (d), in the two vacuum insulation panels to be joined, one of the vacuum insulation panel V ₁ is, the end face of the first insulation material 331 has a first magnet 336a, the other vacuum insulation panel _{V 2} has a second magnet 336b having different magnetic poles and the first magnet 336a on the end face of the first insulation material 331, in the assembled state, the first magnet 336a and the second magnet 336b Is preferably attracted by magnetic force. In FIG. 7D, the magnetic seal improves the tightness in the region X.

Further, as described later, by arranging the vertical frame and the horizontal frame in the heat insulation container, it is possible to improve the airtightness of the joint portion of the two vacuum heat insulation panels.

3. Assembling State and Disassembly State The heat insulation container of the present disclosure can be changed between the assembly state and the disassembly state. The assembled state is a state in which a heat insulating space surrounded by the top surface heat insulating panel, the bottom surface heat insulating panel, and the plurality of side heat insulating panels is formed, and the disassembled state is a state in which a heat insulating space is not formed. . The heat insulation container of the present disclosure can be changed from the assembled state to the disassembled state and from the disassembled state to the assembled state. The disassembly state includes a state in which at least one heat insulation panel is separated (separate state), and a state in which two or more heat insulation panels are folded while being coupled via some member (folded state).

The thermally insulated containers of the present disclosure can be stored or transported in a separated and stacked or collapsed state and smaller. In addition, since the vacuum heat insulating material has good thermal insulation even if the thickness is thin, the heat insulating container in a disassembled state can be further miniaturized by using the vacuum heat insulating material. Furthermore, by using a vacuum heat insulating material, the weight of the heat insulating panel can be reduced, and the internal volume of the heat insulating container in an assembled state can be increased.

Here, when the external volume of the heat insulation container in the assembled state is V _A and the internal volume is V _B , the miniaturization index is defined as (V _A -V _B ) / V _A. The outer volume V _A is a volume calculated from the outer shape of the heat insulation container in the assembled state, and the inner volume V _B is a volume calculated from the inner shape (heat insulation space) of the heat insulation container in the assembled state. It is the largest possible volume. Note that (V _A -V _B ) in the miniaturization index corresponds to the outer volume of the heat insulation container in an ideal disassembly state (a state where heat insulation panels are stacked so that the internal volume is 0). By dividing the value of (V _A -V _B ) by the outer volume V _A of the heat insulation container in the assembled state, it becomes an index of miniaturization in the case of changing from the assembled state to the disassembled state.

The value of (V _A −V _B ) / V _A may be, for example, 1/3 or less or 1/4 or less. When the value of (V _A -V _B ) / V _A is 1/3, the external volume of one heat insulation container in the assembled state is equal to the external volume of three heat insulation containers in the disassembled state. Therefore, for example, it becomes possible to store or transport three heat insulation containers in a disassembled state on the pallet on which one heat insulation container in the assembled state is mounted. From the viewpoint of miniaturization, it is preferable that the value of (V _A -V _B ) / V _{A be} as small as possible.

4. Thermal Insulation Container In the assembled state, the thermal insulation container of the present disclosure has a thermal insulation space surrounded by a top thermal insulation panel, a bottom thermal insulation panel, and a plurality of side thermal insulation panels. The volume of the heat insulation space usually corresponds to the internal volume of the heat insulation container. In the assembled state, the internal volume of the heat insulation container is preferably, for example, 0.2 m ³ or more. When the internal volume of the heat insulation container is 0.2 m ³ or more, miniaturization may be required when not in use.

In addition, the heat insulation container of the present disclosure is excellent in heat insulation during use and can be miniaturized when not in use, and thus has an advantage of being applicable to a large heat insulation container. Furthermore, large thermal insulation containers have the advantage that more articles can be stored or transported. Further, the larger the internal volume of the heat insulation container, the smaller the value of (V _A −V _B ) / V _A in the case where the heat insulation panel thickness is the same. Therefore, the internal volume of the heat insulating container can be in the 0.3 m ³ or more, may also be 0.5 m ³ or more, and may be 0.8 m ³ or more. In addition, the internal volume of the heat insulation container can be 8.0 m ³ or less so that assembly work and disassembly work can be easily performed.

Also, the heat insulation container of the present disclosure may allow the top surface heat insulation panel, the bottom heat insulation panel, and at least one heat insulation panel of the plurality of side heat insulation panels to form an opening in an assembled state. At least one of the heat insulation panels may be capable of forming an opening by the entire heat insulation panel, or may be capable of forming an opening by a portion of the heat insulation panel. For example, each of the front cross section panel 150 and the top surface heat insulation panel 160 of the heat insulation container 100 shown in FIG. 1 has two heat insulation panel parts, and one of the two heat insulation panel parts can be opened and closed by a hinge 101. It is. Thus, at least one of the heat insulation panels may be a heat insulation panel having a plurality of heat insulation panel portions and capable of partially forming an opening. Each of the two heat insulation panels of the front cross section panel 150 of the heat insulation container 100 shown in FIG. 1 and each of the two heat insulation panels of the top heat insulation panel 160 have vacuum heat insulation members including a vacuum heat insulation material. There is.

Furthermore, in the present disclosure, preferably, at least two heat insulation panels of the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels can form the opening. It is because the workability regarding the taking in and out of goods improves. Also, in the present disclosure, one continuous opening may be able to be formed by at least two heat insulation panels of the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels. Since a wide opening can be formed, the workability regarding the taking in and out of an article improves.

An example of the heat insulating container will be described with reference to FIGS. 1 and 8 to 10. FIG. 1 is a schematic perspective view illustrating the heat insulation container of the present disclosure as described above. FIG. 8 is a schematic perspective view illustrating the heat insulation container shown in FIG. 1 with the heat insulation panels removed. FIG. 9 is a schematic perspective view illustrating a state (insulated container in a disassembled state) in which the heat insulation panels removed in FIG. 8 are stacked. FIG. 10 is a schematic perspective view illustrating a state in which the heat insulation containers shown in FIG. 1 are stacked in two stages.

As described above, the heat insulation container 100 shown in FIG. 1 includes the top surface heat insulation panel 160, the bottom surface heat insulation panel 170, the plurality of side heat insulation panels 110, and the pallet 500 having the claw holes 501. On the other hand, as shown in FIG. 8, the heat insulation container 100 in the assembled state in which the heat insulation space 300 is formed is the right heat insulation panel 120, the left heat insulation panel 130, the back heat insulation panel 140, the front heat insulation panel 150, and the top heat insulation panel 160. By separating the bottom heat insulation panel 170 and the pallet 500, respectively, it is possible to bring the heat insulation space 300 into a disassembled state in which the heat insulation space 300 is not formed.

As shown in FIG. 8, the front thermal insulation panel 150, the left thermal insulation panel 130, the rear thermal insulation panel 140 and the right thermal insulation panel 120 which are the side thermal insulation panels 110 respectively have

protective members

150 B, 130 B, 140 B, 120 B, and a vacuum thermal insulation member 150 A. , 130A, 140A, 120A. The top heat insulation panel 160 includes a protection member 160B and a vacuum heat insulation member 160A. The bottom heat insulation panel 170 includes a vacuum heat insulation member 170A. Although not shown, each of the vacuum insulation members comprises a vacuum insulation.

As shown in FIGS. 1 and 8, the right heat insulation panel 120, the left heat insulation panel 130, and the front heat insulation panel 150 are on the top heat insulation panel side which is the upper side of the heat insulation panel at the left and right ends of the heat insulation panel. A vertical frame 310 extends continuously from the end of the frame to the end on the bottom heat insulation panel side which is the lower side of the heat insulation panel. Although not shown, the rear heat insulating panel 140 is also the same. Since the thermal insulation panels joined in the assembled state are less likely to move due to the vertical frame 310, the airtightness is improved. In addition, the vertical frame 310 plays a role as a pillar or a wall that supports the weight of the heat insulation panel and the load from the top surface side. The vertical frame may be made of metal or nonmetal such as plastic or wood. By using the metal vertical frame, the load resistance of the heat insulation container can be further improved, and the airtightness can be hardly reduced. When a metal vertical frame is used, by arranging the vertical frame on the protective member, the metal vertical frame does not contact the heat insulation space 300, and it is possible to suppress the decrease in the heat insulation of the heat insulation container.

As shown in FIGS. 1 and 8, the right thermal insulation panel 120, the left thermal insulation panel 130, and the front thermal insulation panel 150 are respectively provided at the upper and lower ends of the thermal insulation panel from the right side of the thermal insulation panel. A transverse frame 320 is provided which extends continuously to the left end. The front thermal insulation panel 150 also includes a transverse frame (not shown) extending continuously from the right end of the thermal insulation panel to the left end of the thermal insulation panel near the center of the thermal insulation panel. Furthermore, the top heat insulation panel 160 has horizontal frames 320 continuously extending from one end of the heat insulation panel to the other end at the upper, lower, left, and right ends of the heat insulation panel, respectively. ing. Since the heat insulating panels joined in the assembled state are less likely to move due to the horizontal frame 320, the airtightness is improved. The horizontal frame may be made of metal or nonmetal such as plastic or wood. By using the metal horizontal frame, the load resistance of the heat insulation container can be further improved, and the airtightness can be hardly reduced. When the metal horizontal frame is used, the metal horizontal frame does not contact the heat insulation space 300 by arranging the horizontal frame on the protective member, so that the heat insulation deterioration of the heat insulation container can be suppressed.

On the other hand, as shown in FIG. 9, in the heat insulation container 100 in the disassembled state, for example, the bottom heat insulation panel 170 having the vacuum heat insulation member 170A is placed, and the left heat insulation panel 130 is placed thereon. The rear heat insulating panel 140 is stacked on the lower side in the direction of the protective member 140B and the upper side of the rear heat insulating panel 140 in the direction of the vacuum heat insulating member 140A. Furthermore, the right side heat insulation panel 120 is stacked on the lower side in the direction of the vacuum heat insulation member 120A and the upper side being the protection member 120B, and the front heat insulation panel 150 is formed on the lower side as the protection member 150B. And the top surface heat insulation panel 160 is finally stacked so that the lower side is the vacuum heat insulation member 160A and the upper side is the protection member 160B. By using the uppermost side of the heat insulation container 100 in the disassembled state as a protective member, the vacuum heat insulating material can be protected.

Further, as shown in FIGS. 1 and 8, when the heat insulation container 100 includes the vertical frame 310, the weight of the side heat insulation panel or the top surface side received by the heat insulation container at the lower end of the two-tiered heat insulation container. The load can be supported, and in the assembled state, the bonding of the heat insulating panels can be moved by its own weight or excessive weight to reduce the airtightness or damage of the vacuum heat insulating material. Specifically, by providing the vertical frame 310, as shown in FIG. 10, storage and transportation may be performed in a state where the heat insulation container 100A of the same specification is stacked on the heat insulation container 100 at the upper side. In addition to the vertical frame, a horizontal frame may be provided in order to further improve the load resistance and make it difficult to reduce the air tightness.

The heat insulation container of the present disclosure may or may not include the pallet. In the former case, the pallet is preferably located on the side opposite to the heat insulation space of the bottom heat insulation panel of the heat insulation container. Insulated containers with pallets can be easily moved by forklifts and handlifts, etc., thus reducing the risk of accidentally damaging the vacuum insulation during moving operations. The bottom insulation panel of the insulation container may be joined to the pallet and may be separable from the pallet.

6. Others Another example of the heat insulation container will be described using FIGS. 11 and 12. FIG. 11 is a schematic perspective view illustrating the assembly process of the heat insulation container of the present disclosure. FIG. 12 is a schematic perspective view illustrating a state in which the heat insulation container described in FIG.

As shown in FIG. 11 (a), the heat insulation container 100 in the disassembled state (folded state) is, in order from the right side (+ Y side), the front heat insulation panel 150, the right heat insulation panel 120, the back heat insulation panel 140, the bottom heat insulation panel 170, The top surface heat insulation panel 160 and the left surface heat insulation panel 130 are stacked, and the upper surface (+ Z of the stack of the right surface heat insulation panel 120, the back surface heat insulation panel 140, the bottom surface heat insulation panel 170, the top surface heat insulation panel 160, and the left surface heat insulation panel 130) The exterior member 180 is disposed so as to surround the side surface), the bottom surface (the surface on the -Z side), the left and right side surfaces (the surfaces on the + Y and -Y sides), and the back surface (the surface on the -X side). In addition, the upper surface, the bottom surface, and the back surface of the exterior member 180 are partially folded between the top heat insulation panel 160 and the left heat insulation panel 130. The front heat insulation panel 150 is folded on the right side (+ Y side) of the right heat insulation panel 120 via the exterior member 180.

First, as shown in FIG. 11A, the left heat insulation panel 130 is moved to the left (−Y side) (arrow A), and the top, bottom, and back of the folded exterior member 180 are developed. Next, as shown in FIG. 11B, in the exterior member 180, the top surface heat insulation panel 160 is opened to the upper left side (arrow B), and is disposed along the top surface of the exterior member 180. Furthermore, the bottom heat insulation panel 170 is opened to the lower left side (arrow C), and is arranged along the bottom of the exterior member 180. Furthermore, with the back heat insulation panel 140 stacked on the right heat insulation panel 120, with the back (-X side) edge as a fulcrum, the front (+ X side) edge is turned to the left back (arrow D) It arranges along the back of member 180. Finally, as shown in FIG. 11C, the front heat insulation panel 150 folded on the right heat insulation panel 120 is folded back (arrow E), and the heat insulation container 100 is completed. In this way, it is possible to change from the disassembled state (folded state) to the assembled state. It is also possible to change from the assembled state to the disassembled state (folded state) by the reverse procedure.

The heat insulation container 100 shown in FIG. 11 is a vacuum heat insulation panel having a vacuum heat insulation member including a right heat insulation panel 120, a left heat insulation panel 130, a back heat insulation panel 140, a top heat insulation panel 160 and a bottom heat insulation panel 170. is there. Further, the heat insulation container 100 having a structure in which the front heat insulation panel 150 can be partially opened and closed is brought into an assembled state of a quadrangular prism structure by closing the front heat insulation panel 150 and the heat insulation surrounded by the heat insulation panel. It is possible to form a space inside the container. Further, in the heat insulation container 100 shown in FIG. 11, the ventilation frequency is equal to or less than a specific value in the assembled state.

As shown in FIG. 12, the heat insulating container 100 described in FIG. 11 is disposed on the transfer cage 250, and the transfer cage 250 can freely transfer the heat insulating container 100 containing articles. The transport car 250 shown in FIG. 12 includes a carriage portion 251 on which the heat insulation container 100 is placed, a fence portion 252 holding opposite side surfaces of the heat insulation container 100, and wheels 251a located at each corner of the carriage portion 251. Have.

The outer peripheral shape and each dimension of the heat insulation container of this indication are not specifically limited. The heat insulation container of the present disclosure may have a size on the order of cm, or one or more of the sizes may be 1 m or more. As a specific example of the outer peripheral shape of the side heat insulation panel of the heat insulation container, when the heat insulation container in the assembled state is seen from the top surface side, the vertical width and the horizontal width are respectively a quadrangle of 1000 mm or more and 1200 mm or less And 1319 mm or less quadrilateral of 916 mm or more and 1116 mm or less, vertical width of 1100 mm or more and 1300 mm or less quadrilateral of 900 mm or more and 1100 mm or less, vertical width of 1100 mm or more and 1300 mm or less and horizontal width of 700 mm or more and 900 mm The following quadrilaterals may be mentioned: quadrilaterals each having a longitudinal width and a lateral width of 1065 mm or more and 1265 mm or less. By making the shape of the side heat insulation panel suitable for the shape of the standard pallet of each country, it is possible to improve the efficiency of transportation and storage. The height of the outer peripheral shape of the side heat insulation panel of the heat insulation container can be, for example, 300 mm or more, may be 500 mm or more, and may be 700 mm or more. In addition, as the outer peripheral shape of the side heat insulation panel of the heat insulation container, for example, when the heat insulation container in the assembled state is viewed from the top surface side, a quadrilateral having a vertical width of 795 mm to 995 mm and a horizontal width of 644 mm to 844 mm It is also good. By making the dimensions suitable for the shape of a standard carriage, transportation and storage can be made more efficient. Moreover, it is preferable that the heat insulation container of this indication is used for storage or transport of the articles | goods which need cold insulation or heat retention, for example in the distribution field.

7. EXPERIMENTAL EXAMPLE One of the specific examples of the heat insulation container of this indication was produced, and the ventilation frequency and the cold storage time were measured by the above-mentioned method. In this specific example, the heat insulating container has a configuration shown in FIGS. 1 and 2, and has a rectangular parallelepiped shape with an inner dimension of one side of 1010 mm long × 1010 mm wide × 740 mm high. In each vacuum heat insulation panel of the heat insulation container, a 6 mm thick vacuum heat insulating material (glass wool as a core material, thermal conductivity 0.003 W / m K) as a first heat insulating material, a 15 mm thick foamed heat insulating material (XPS as a second heat insulating material) : A 1 mm thick plastic sheet with an aluminum vapor deposition layer was used as a heat shielding sheet covering the entire circumference of an extruded foam urethane, a thermal conductivity of 0.036 W / mK), and the first heat insulating material and the second heat insulating material. In the heat insulation container, a polyethylene sheet having a thickness of 1 mm was used as a protective member, and aluminum was used as a vertical frame and a horizontal frame. The measured value of the ventilation frequency of the heat insulation container by the above-mentioned method is 0.034 times / hr, the measurement value of the cooling time of the water of 75.5 kg by the above-mentioned method is 13.6 hr, and the heat insulation container is a good heat insulation It confirmed that it showed sex.

The present disclosure is not limited to the above embodiment. The above-described embodiment is an exemplification, and the technical idea described in the claims of the present disclosure has substantially the same configuration as that of the technical idea described in the claims of the present disclosure, and exhibits the same operation and effect as the present invention in any case. It is included in the technical scope of the disclosure.

B. Simulation In the following, the relationship between the cooling time and the ventilation frequency by simulation is described.

When the temperature outside the heat insulation container is high and the temperature inside the heat insulation container is low, the heat quantity Q [J] flowing from the outside to the inside of the heat insulation container during a predetermined time t [hr] is expressed by the following equation (1 It can be shown in).
Q = (q _A + q _B ) × t formula (1)
Here, q _A is the amount of heat per unit time [J / hr] flowing through the heat insulating panel constituting the heat insulating container, and q _B passes through the gap between the heat insulating panels of the heat insulating container, etc. It is the heat quantity [J / hr] per unit time which flows in.

The heat quantity q _A [J / hr] per unit time flowing in through the heat insulation panel constituting the heat insulation container can be expressed by the following equation (2).
q _A = U x L x T x 3600 Formula (2)
Here, U is the average of the heat transmission coefficient [W / m ² K] of each heat insulation panel constituting the heat insulation container, L is the surface area of the inner side of the heat insulation container [m ² ], and T is The temperature difference [K] between the inside and the outside of the heat insulation container.

The amount of heat q _B [J / hr] per unit time flowing in through the gap between the heat insulation panels of the heat insulation container can be expressed by the following equation (3).
q _B = D x V x a x C x T Formula (3)
Here, D is the number of times of ventilation [times / hr], V is the internal volume of the insulation container [m ³ ], a is an environmental coefficient, and C is the heat capacity of air [J / m ³ K], and T is a temperature difference [K] between the inside and the outside of the heat insulation container. In this simulation, the environmental coefficient is 5.34, the specific heat capacity of air is 1.0 J / gK, and the density of air is 1.3 × 10 ³ g / m ³ .

The environmental coefficient a is a multiplication factor for reflecting the influence of environmental factors such as the temperature difference between the outside and the inside of the heat insulation container and the wind speed outside the heat insulation container. This is because the movement of the air flowing in through the gaps between the heat insulation panels of the heat insulation container is influenced not only by the factors of the heat insulation container itself such as the size and shape of the heat insulation panels but also by environmental factors. . The environmental factor a was determined by the following procedure. The thermal insulation container was placed in a sealed room without temperature control to measure the normal ventilation frequency of the thermal insulation container. Set the insulation container in a state where the inside is kept at about 10 ° C with a cold storage material set at 35 ° C to 40 ° C (no humidity control), and install it in a ventilated environmental test room to set the environment of the insulation container. The ventilation rate of the test was measured. The environmental factor was determined by dividing the ventilation frequency of the environmental test of the heat insulation container by the normal ventilation frequency of the heat insulation container.

The heat insulation container set the cube (inner surface area L is 6 m < ² >, internal volume V is 1 m < ³ >) of 1 mm of internal dimensions of one side which all surfaces were enclosed by the heat insulation panel. In addition, the heat insulation panel is extruded foam polystyrene (XPS, thermal conductivity 0.036 W / mK, thickness 15 mm), vacuum heat insulating material (thermal conductivity 0.003 W / m K, thickness 5 mm), extruded foam polystyrene (XPS, heat conductive A three-layer structure with a rate of 0.036 W / mK and a thickness of 15 mm was set. The heat transmission coefficient U of this heat insulating panel is 0.4 (W / m ² K).

In the use condition of the heat insulation container, 8 kg of cold storage material (latent heat amount of 320 kJ / kg per unit weight) is put inside the heat insulation container, and the heat insulation container is installed in an environment where the temperature difference between inside and outside of the heat insulation container is 30K. Was set. In this setting, for example, it is possible to assume a state in which the inside of the heat insulation is kept in the cold storage temperature zone (0 ° C. to 5 ° C.) with a cold storage material in summer of Japan (air temperature 30 ° C.

From the above, a simulation was performed on the relationship between the time for keeping cold and the number of times of ventilation. The cold storage time t [hr] is a time when the heat quantity Q [J] flowing from the outside of the heat insulation container into the inside reaches the latent heat quantity 2560 kJ of the cold storage material inside the heat insulation container. The ventilation frequency is set almost without bias on the logarithmic axis in the range of 0.001 times / hr to 10 times / hr, the cooling time is calculated for each set number of ventilation times, and the approximate curve is calculated by the least squares method from the calculated value. The

FIG. 13 shows the result of simulation in which the thickness of the vacuum heat insulating material is 5.0 mm. When the ventilation frequency is 0.1 times / hr, a cooling time close to the case where the ventilation frequency is 0.001 / hr (when the airtightness is extremely high) can be realized. On the other hand, when the ventilation frequency was more than 0.1 times / hr, the decrease in the cooling time was remarkable as the ventilation frequency increased. That is, when the ventilation frequency is more than 0.1 times / hr, slight fluctuation of the ventilation frequency (airtightness) has a great influence on the cooling time, but when the ventilation frequency is 0.1 times / hr or less, Even if the number of times of ventilation (airtightness) fluctuated, the influence on the cooling time was small, and the cooling time was stable. This tendency is not limited to the case where the thickness of the vacuum heat insulating material is 5.0 mm, and as shown in FIG. 14, it was the same even if the thickness of the vacuum heat insulating material changed. The simulation conditions are the same except that the thickness of the vacuum heat insulating material is changed, and the thickness of each vacuum heat insulating material is 0.5 mm for a, 2.5 mm for b, 5.0 mm for c, and 7 for d The results for .5 mm, e are 10.0 mm, and f is 12.5 mm.

Heat Q _T which flows from the outside to the inside of the heat insulating container, the heat quantity Q _B flowing through the gap, such as between the insulation panels to each other in the heat Q _A and the heat insulating container which flows through the insulation panel constituting the heat insulating container It is a sum. To stabilize the cold time, the effect of Q _B gives the cold time Q _A may be sufficiently smaller than the impact on the cold time. The value of Q _A is sufficiently small Q _B than impact on cold time depends on the value of Q _A, it may be relatively large A high value of Q _A, a relatively smaller value of Q _A It needs to be small. Therefore, in the heat insulating container having a smaller value of Q _A by use of the vacuum heat insulating material, unless the value is also correspondingly small Q _B, the cold time is not stable. From the above simulation results, it can be seen that it is the heat insulation container having a ventilation frequency of not more than 0.1 times / hr that can sufficiently exhibit the performance of the heat insulation container using the vacuum heat insulating material. That is, the heat insulation container can be changed between the assembled state and the disassembled state, and in the heat insulation container using the vacuum heat insulating material, the air insulation frequency is 0.1 times / hr or less due to the airtightness. It has been confirmed that it is important to suppress the decrease in heat insulation of

On the other hand, in FIG. 13, when the ventilation frequency was 0.02 / hr, the same cold-sinking time was obtained as when the ventilation frequency was 0.001 / hr (when the airtightness was extremely high). This tendency is not limited to the case where the thickness of the vacuum heat insulating material is 5 mm, and as shown in FIG. 14, it was the same even if the thickness of the vacuum heat insulating material changed. That is, in order to improve the heat insulation property of the heat insulation container, it is effective to improve the heat insulation property of the heat insulation panel (rather than excessively improving the airtightness) than setting the ventilation frequency lower than 0.02 times / hr. Was suggested.

Further, as shown in FIG. 15 and FIG. 16, the change rate of the cold storage time in the common logarithm of the ventilation frequency is determined from the slope of each curve in FIG. 13 and FIG. 14. The insulation container of ventilation frequency where change rate of cooling time in common logarithm of ventilation frequency is -1, change rate of cold storage time in common logarithm of ventilation frequency is small, so the insulation performance of heat insulation panel is properly exhibited It can be said that it is a state. Therefore, from the viewpoint of exhibiting the heat insulating property of the heat insulation panel, it is preferable to set the ventilation frequency at which the change rate of the cooling time in the common logarithm of the ventilation frequency is -1 as the upper limit of the ventilation frequency of the heat insulation container provided with the heat insulation panel. .

In addition, considering only the effect of air tightness, the thicker the vacuum heat insulating material, the lower the target ventilation frequency. At first glance, the thicker the vacuum heat insulating material, the higher air tightness seems to be required. . However, in fact, as the vacuum heat insulating material is thicker, the heat insulating property of the heat insulating panel is improved, and the heat insulating property as the heat insulating container is also improved. For example, in this simulation, in FIG. 14, when the thickness of the vacuum heat insulating material is 12.5 mm and the ventilation frequency is 0.1 times / hr, the cold storage time is 17 hours, and this value is the vacuum heat insulating material. Of a thickness of 10.0 mm and a ventilation frequency of 0.001 / hr. Thus, as the vacuum heat insulating material is thicker, the influence of the heat insulating property of the heat insulating panel becomes dominant, and the heat insulating property as the heat insulating container is also improved.

Further, the details of the relationship between the number of times of ventilation and the cooling time are shown in Table 1.

The thickness of the vacuum heat insulating material correlates with the heat transmission coefficient of the heat insulating panel, and if the heat conductivity of the vacuum heat insulating material is the same, the heat transmission coefficient of the heat insulating panel decreases as the thickness of the vacuum heat insulating material increases. . For example, in this simulation, the heat transmission coefficient of the heat insulation panel for obtaining a heat insulation container having a cold storage time of 7 hours or more is 0.5 W / m ² K or less.

(Relationship between insulation panel thickness, insulation container volume and miniaturization index)
The relationship between the thickness of the heat insulation panel, the volume of the heat insulation container and the miniaturization index was evaluated. When the external volume of the thermal insulation container in the assembled state is V _A and the internal volume is V _B , the miniaturization index is defined as (V _A -V _B ) / V _A.

For example, when assuming a cube whose side is 100 cm long and the heat insulation panel thickness is 10 mm (1 cm), the outer volume _VA of the heat insulation container is 1 m ³ (1000 L). On the other hand, the internal volume _{V B} of the thermally insulated container becomes ^{(1.00- (0.01 × 2))} 3 = 0.94m 3 (940L). Therefore, the miniaturization index is 6%. Further, the miniaturization index was calculated in the same manner except that the length of one side and the thickness of the heat insulation panel were changed to the values shown in Table 2.

As shown in Table 2, there is a correlation between the thickness of the heat insulation panel and the side length of the heat insulation container (length of one side of the heat insulation panel). For example, in order to realize (V _A −V _B ) / V _A ≦ 1/3, it is necessary to use a thin heat insulating panel having a thickness of less than 70 mm (7 cm) when the length of one side of the heat insulating panel is 100 cm. . That is, in order to reduce the size when not in use, it is necessary to reduce the thickness of the heat insulation panel, and when the thickness of the heat insulation panel is reduced, the heat insulation of the heat insulation panel is likely to be degraded. It is possible to increase the thermal insulation of the thermal insulation panel by using a vacuum thermal insulation material, but when using a vacuum thermal insulation material, as mentioned above, the properties peculiar to the vacuum thermal insulation material (Thin thickness and processability are Due to the low property that the performance degradation at the time of breakage is large, the airtightness of the heat insulation container tends to be reduced. Therefore, when it is going to obtain the heat insulation container which can be miniaturized at the time of nonuse, it is necessary to pay more attention to airtightness.

100 ... thermal insulation container 110 ... side thermal insulation panel 110A ... vacuum thermal insulation member 110B ... protection member 120 ... right thermal insulation panel 130 ... left thermal insulation panel 140 ... rear thermal insulation panel 150 ... frontal thermal insulation panel 160 ... top thermal insulation panel 170 ... bottom thermal insulation panel 310 ... Vertical frame 320 ... Horizontal frame 331 ... First heat insulating material 331 a ... Core material 331 b ... Exterior material 332 ... Second heat insulating material 333 ... Heat shielding sheet 334 ... Adhesive layer

Claims

An insulation container which can be changed between an assembled state and a disassembled state, and which uses a vacuum insulation material,
The insulation container comprises a top insulation panel, a bottom insulation panel, and a plurality of side insulation panels having a right insulation panel, a rear insulation panel, a left insulation panel, and a front insulation panel.
In the assembled state, a heat insulation space surrounded by the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels is formed.
The decomposition state is a state in which the heat insulation space is not formed,
At least four heat insulation panels of the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels have a vacuum heat insulation member including the vacuum heat insulation material,
The heat insulation container whose ventilation frequency is 0.1 times / hr or less in the said assembly state.
An insulation container which can be changed between an assembled state and a disassembled state, and which uses a vacuum insulation material,
The insulation container comprises a top insulation panel, a bottom insulation panel, and a plurality of side insulation panels having a right insulation panel, a rear insulation panel, a left insulation panel, and a front insulation panel.
In the assembled state, a heat insulation space surrounded by the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels is formed.
The decomposition state is a state in which the heat insulation space is not formed,
At least four heat insulation panels of the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels have a vacuum heat insulation member including the vacuum heat insulation material,
The heat insulation container whose ventilation frequency is less than or equal to a value at which a change rate of cooling time in common logarithm of the ventilation frequency is -1 in the assembled state.
The heat insulation container of Claim 1 or Claim 2 whose internal volume of the said heat insulation container is 0.2 m < 3 > or more in the said assembly state.
The value of (V A -V B ) / V A is 1/3 or less when the external volume of the heat insulation container is V A and the internal volume is V B in the assembled state. An insulated container according to any of the preceding claims.
The heat insulation container according to any one of claims 1 to 4, wherein the ventilation frequency is 0.02 times / hr or more.
The average of the heat transmission coefficient of the said heat insulation panel which has the said vacuum heat insulating member containing each said vacuum heat insulating material is 0.5 W / m < 2 > K or less, The claim in any one of Claim 1 to 5 Insulated container as described.