JP2019014489A - Heat insulation container - Google Patents

Abstract

To provide a heat insulation container which has a good heat insulation property while it is used, and which can be miniaturized when it is not used.SOLUTION: A heat insulation container 100 which is changeable between an assembled state and a disassembled state and which uses a vacuum heat insulation material includes: a top surface heat insulation panel 160; a bottom surface heat insulation panel 170; and a plurality of side surface heat insulation panels 110 including a back surface heat insulation panel 140, a left surface heat insulation panel 130 and a front surface heat insulation panel 150. In the assembled state, a heat insulation space surrounded by the top surface heat insulation panel, the bottom surface heat insulation panel and the plurality of side surface heat insulation panels is formed, and in the disassembled state, the heat insulation space is not formed. At least four heat insulation panels out of the top surface heat insulation panel, the bottom surface heat insulation panel and the plurality of side surface heat insulation panels, have a vacuum heat insulation member including the vacuum heat insulation material, and in the assembled state, the number of times of ventilation is 0.1 time/hr or less.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to an insulated container.

  The vacuum heat insulating material has a core material and an exterior material, and the inside of the bag made of the exterior material is maintained in a vacuum state in which the core material is disposed and the pressure is lower than the atmospheric pressure. . Since heat convection inside the bag is suppressed, the vacuum heat insulating material can exhibit good heat insulating properties. Since the heat insulating property per unit thickness is higher than that of a general foam heat insulating material, the vacuum heat insulating material can reduce the thickness of the heat insulating material while ensuring a desired heat insulating property. Therefore, by using the vacuum heat insulating material for the heat insulating container, for example, it is possible to reduce the space and weight of the heat insulating container.

  A heat insulating container that can be changed between an assembled state and a disassembled state can be reduced in size by bringing the heat insulating container in an assembled state into a disassembled state when not in use. For example, Patent Documents 1 to 3 disclose a heat insulating container using a vacuum heat insulating material and capable of changing an assembled state and a disassembled state.

JP 2006-123914 A JP 2008-68871 A Japanese Patent Laying-Open No. 2015-199527

  The main object of the present disclosure is to provide a heat insulating container that has good heat insulation during use and can be downsized when not in use.

  In the present disclosure, the assembled state and the disassembled state can be changed, and a heat insulating container using a vacuum heat insulating material, the heat insulating container includes a top heat insulating panel, a bottom heat insulating panel, and a right heat insulating panel, It has a plurality of side heat insulation panels having a rear heat insulation panel, a left heat insulation panel, and a front heat insulation panel, and the assembled state is surrounded by the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels. The heat insulation space is formed, the disassembled state is a state in which the heat insulation space is not formed, and at least 4 of the top heat insulation panel, the bottom heat insulation panel, and the plurality of side surface heat insulation panels. One heat insulation panel has the vacuum heat insulation member containing the said vacuum heat insulating material, and provides the heat insulation container whose ventilation frequency is 0.1 times / hr or less in the said assembly state. That.

  In the present disclosure, the assembled state and the disassembled state can be changed, and a heat insulating container using a vacuum heat insulating material, the heat insulating container includes a top heat insulating panel, a bottom heat insulating panel, and a right heat insulating panel, It has a plurality of side heat insulation panels having a rear heat insulation panel, a left heat insulation panel, and a front heat insulation panel, and the assembled state is surrounded by the top heat insulation panel, the bottom heat insulation panel, and the plurality of side heat insulation panels. The heat insulation space is formed, the disassembled state is a state in which the heat insulation space is not formed, and at least 4 of the top heat insulation panel, the bottom heat insulation panel, and the plurality of side surface heat insulation panels. One heat insulating panel has a vacuum heat insulating member including the vacuum heat insulating material, and in the assembled state, the number of ventilations is a cold insulation time in the common logarithm of the number of ventilations. The rate of change is less than or equal to the value to be -1, provides thermal insulation vessel.

  The heat insulation container of this indication has the effect that heat insulation at the time of use is good, and can be reduced in size 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 junction 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 heat insulation member in this indication. It is a schematic sectional view which illustrates the vacuum heat insulation panel in this indication. It is a schematic sectional view which illustrates the vacuum heat insulation member in this indication. It is a schematic diagram explaining the junction part of two vacuum heat insulation panels. It is a schematic perspective view which illustrates the heat insulation container of this indication. It is a schematic perspective view which illustrates the thermal insulation container of the decomposition state 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 schematic perspective view which illustrates the heat insulation container of this indication. It is a graph which shows the relationship between the cold insulation time by simulation, and the frequency | count of ventilation. It is a graph which shows the relationship between the cold insulation time by simulation, and the frequency | count of ventilation. It is a graph which shows the change rate of the cool-keeping time in the common logarithm of the ventilation frequency by simulation. It is a graph which shows the change rate of the cool-keeping time in the common logarithm of the ventilation frequency by simulation.

A. The insulated container of the present disclosure will be described below 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 exaggerated as appropriate for easy understanding. Moreover, in each figure, the hatching showing the cross section of the member is omitted as appropriate. Numerical values such as dimensions and material names of the respective members described in the present specification are examples of the embodiment, and the present invention is not limited thereto, and can be appropriately selected and used. In this specification, terms specifying the shape and geometric conditions, for example, terms such as parallel, orthogonal, and vertical are intended to include substantially the same state in addition to being strictly meant.

  FIG. 1 is a schematic perspective view illustrating an insulated container according to the present disclosure. A heat insulating container 100 shown in FIG. 1 includes a pallet 500 having a top heat insulating panel 160, a bottom heat insulating panel 170, a plurality of side heat insulating panels 110, and claw holes 501. The plurality of side heat insulating panels 110 are a right heat insulating panel 120, a left heat insulating panel 130, a back heat insulating panel 140, and a front heat insulating panel 150. The top heat insulating panel 160, the bottom heat insulating panel 170, and the plurality of side heat insulating panels 110 are vacuum heat insulating panels having a vacuum heat insulating member including a vacuum heat insulating material. The right heat insulation panel 120 and the left heat insulation panel 130 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.

  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 insulating container 100 is in an assembled state of a quadrangular prism structure by closing the front heat insulating panel 150 and the top heat insulating panel 160, and the top heat insulating panel 160, the bottom heat insulating panel 170, and the plurality of side heat insulating panels. A heat insulating space surrounded by 110 can be formed inside the container. Moreover, the heat insulation container 100 shown in FIG. 1 has the ventilation frequency below a specific value in the assembled state.

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

  According to the present disclosure, the assembled state and the disassembled state can be changed, the vacuum heat insulating material is used, and the ventilation frequency is not more than a specific value. It can be set as the heat insulation container which can be reduced in size sometimes. This will be described in detail below.

  When a vacuum heat insulating material is used as a heat insulating material for a heat insulating container that can be changed between an assembled state and a disassembled state, there arises a problem that the hermeticity of the heat insulating container is likely to be lowered due to the properties unique to the vacuum heat insulating material. This point will be described with reference to FIG. FIG. 2 is a schematic diagram for explaining a joining portion of two side heat insulating panels. For example, in the drawing of the joining portion of the back heat insulating panel 140 and the right heat insulating panel 120 from the top heat insulating panel 160 side in FIG. Equivalent to.

  The two side surface heat insulation panels 110X and 110Y shown in FIG. 2 have the heat insulation member 110A, the adhesive layer 334, and the protection member 110B in this order, respectively. Furthermore, each heat insulating member 110 </ b> A includes a vacuum heat insulating material as the first heat insulating material 331 and, for example, a foam heat insulating material as the second heat insulating material 332. Further, the two side heat insulating panels 110X and 110Y are joined together by fitting the protective members 110B with the vertical frame 310, and the heat insulating members 110A are in contact with each other 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 to 10 times higher than that of a general foam heat insulating material. However, there is a property that a desired heat insulating property can be obtained. However, when the thickness of the heat insulating material is significantly reduced, the contact area between the end surface of the side heat insulating panel 110X and the main surface of the side heat insulating panel 110Y in the region X of FIG. The airtightness of the glass tends to decrease.

  In addition, the vacuum heat insulating material used as the first heat insulating material 331 has a property of low workability because the inside needs to be kept in a vacuum state whose pressure is lower than the atmospheric pressure. In addition, for example, in the foam insulation, even if a part of the foam insulation is damaged, the decrease in heat insulation is limited to the damaged part, but in the vacuum insulation, a part of the vacuum insulation is If it breaks, the heat insulation of the whole vacuum heat insulating material will fall. Thus, a vacuum heat insulating material has the property that the performance degradation at the time of a failure | damage is large. Therefore, from the viewpoint of improving workability and preventing breakage, a second heat insulating material (foam heat insulating material) 332 may be used together with the first heat insulating material (vacuum heat insulating material) 331 as shown in FIG. However, when a plurality of heat insulating materials are stacked, in the region X of FIG. 2, the contact surface between the end surface of the first heat insulating material (vacuum heat insulating material) 331 and the main surface of the second heat insulating material (foam heat insulating material) 332, and In addition, two contact surfaces of the end surface of the second heat insulating material (foam heat insulating material) 332 and the main surface of the second heat insulating material (foam heat insulating material) 332 are generated, and as a result, the airtightness of the heat insulating container is lowered. It becomes easy to do.

  In this way, when vacuum insulation is used as a heat insulation material for an insulated container that can be changed between an assembled state and a disassembled state, the properties unique to the vacuum insulation material (thinness is thin, workability is low, and performance is deteriorated when damaged. Due to the large nature), the airtightness of the heat insulating container tends to be lowered. Therefore, it is possible to change the assembly state and the disassembly state, and in the heat insulating container using the vacuum heat insulating material, it is important to manage the airtightness. However, it is possible to change the assembled state and the disassembled state, and in the heat insulating container using the vacuum heat insulating material, how much influence the airtightness of the heat insulating container has on the heat insulating property of the whole heat insulating container. The knowledge about is not known conventionally. In the present disclosure, the relationship between the air tightness (the number of ventilations) and the cold insulation time was examined in detail. By setting the number of ventilations to a predetermined value or less, the heat insulating property of the heat insulating container is reduced due to the air tightness. It was found that it can be suppressed.

Further, the above-described technical idea of airtightness management can be changed between an assembled state and a disassembled state, and is closely related to a problem specific to a heat insulating container using a vacuum heat insulating material. For example, in the case of a heat insulating container that does not need to be disassembled, it is not necessary to form a decomposable joint part in the first place. Therefore, even when a vacuum heat insulating material is used, the problem of airtightness due to decomposition does not occur. On the other hand, in the case of a heat insulating container using a general foam heat insulating material without using a vacuum heat insulating material even if the heat insulating container can be changed between an assembled state and a disassembled state, the general foam heat insulating material is sufficiently thick. Since the processability is higher than that of the vacuum heat insulating material, the problem of airtightness caused by the heat insulating material is unlikely to occur. In addition, in the case of a heat insulating 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 performance of the heat insulating material in order to improve the heat insulating property. 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 improve the heat insulating property by managing the airtightness. As described above, the technical idea of airtightness management can be changed between an assembled state and a disassembled state, and is closely related to a problem specific to a heat insulating container using a vacuum heat insulating material.
Hereinafter, the heat insulating container of the present disclosure will be described in more detail.

1. Ventilation frequency It is preferable that the ventilation frequency of the heat insulation container of this indication is 0.1 times / hr or less in an assembly state. When the number of ventilations is 0.1 times / hr or less, the influence of heat transfer through the gaps between the insulation panels on the cold insulation time is affected by the influence of heat transfer through the insulation panel on the cold insulation time. This is because it is sufficiently smaller than that and the cooling time is stabilized. In other words, if the ventilation frequency is 0.1 times / hr or less, it is possible to suppress a decrease in heat insulation of the heat insulating container due to a decrease in airtightness due to being able to change the assembly state and the disassembly state, and vacuum This is important in fully exhibiting the heat insulation performance of the heat insulation container using the heat insulation material. The ventilation frequency is calculated as follows.

That is, the number of ventilations (times / hr) of the heat insulating container is determined according to JIS A 1406: 1974 (indoor ventilation measurement method (carbon dioxide gas method)). ³ / hr) is measured and the ventilation amount Q is obtained by dividing by the internal volume of the insulated container. Ventilation volume is measured by releasing carbon dioxide gas in a heat insulating container using gas cylinders or vaporized dry ice, measuring carbon dioxide concentration, and formula (1) (Seidel formula) described in 3.1 of the above JIS standard. ) 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 with different heights in the heat insulating container. The average value is the carbon dioxide concentration. Moreover, based on description of said JIS specification 2.2, the atmosphere in a heat insulation container is stirred using a small fan so that concentration distribution may become uniform at the time of the first carbon dioxide gas concentration measurement. “The 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 insulating container is stirred so that this state is obtained. Further, the carbon dioxide gas concentration at the time of the first measurement is adjusted to be 5000 ppm or more and 10,000 ppm or less. Furthermore, the ventilation volume is measured with no temperature difference between inside and outside the insulated container and in a windless state. In addition, it is preferable to perform the measurement of ventilation volume several times (for example, 5 times or more and 10 times or less), and to obtain | require as an average value.

  Moreover, it is preferable that the ventilation frequency | count of the heat insulation container of this indication is below the value from which the change rate of the cool storage time in the common logarithm of the said ventilation frequency | count is -1 in an assembly state. It is because the heat insulation performance of a heat insulation panel can fully be exhibited when the frequency | count of ventilation is below the value from which the change rate of the cool storage time in the common logarithm of the frequency | count of ventilation is -1. In other words, it is important to sufficiently exhibit the heat insulating performance of the heat insulating container using the vacuum heat insulating material that the rate of change in the cold insulation time in the common logarithm of the number of ventilations is a value that is equal to or less than a value that is -1. . The change rate of the cooling time in the common logarithm of the ventilation frequency is obtained as follows.

  That is, the cold insulation time is 8 ° C. or less for a sample (2 L PET container containing 2 ° C. water corresponding to 10% of the internal volume of the heat insulating container) stored in the inside of the heat insulating container in an atmosphere with an outside temperature of 35 ° C. It is evaluated by the time that can be kept at (cooling time). First, the heat insulating container is left in an atmosphere having a temperature of 35 ° C., and the temperature inside and outside the heat insulating container is set to 35 ° C. Next, a PET container containing 2 ° C. water corresponding to 10% of the internal volume of the heat insulating container is prepared as a sample to be stored. A commercially available 2 L PET container is used as the PET container. Next, a sample is arrange | positioned in the center of the bottom face insulation panel of a heat insulation container. A hole is made in the cap portion of the PET container, and a thermocouple or a resistance temperature detector having a length about half the height of the PET container is introduced from the hole. Thereby, the temperature of the central part of the PET container is measured. Next, the heat insulating container is sealed. In addition, no cryogen is used.

  In this way, the cold insulation time can be obtained. On the other hand, when a heat insulating panel having a structure that can be opened and closed is used, the ventilation frequency can be experimentally adjusted by adjusting the degree of opening and closing to an intentional non-regular state. Even when a heat insulating panel having a structure that can be opened and closed is not used, the degree of joining between the heat insulating panels is intentionally irregular, for example, by sandwiching a hollow pipe between the heat insulating panels. By adjusting to the state, the ventilation frequency can be adjusted experimentally. Therefore, the relationship between the number of ventilations and the cooling time can be obtained by obtaining the cooling time each time for a plurality of ventilation frequencies adjusted experimentally. The measurement of a plurality of ventilation rates is preferably performed almost without bias on the common logarithmic axis, for example, in a range of ventilation rates of 0.01 times / hr or more and 1 time / hr or less. For example, it is 5 points or more, and may be 10 points or more.

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

  On the other hand, the ventilation frequency of the heat insulating container of the present disclosure is preferably 0.02 times / hr or more in the assembled state. By allowing the ventilation frequency of 0.02 times / hr or more, it becomes easy to make the joint part between the heat insulation panels easy to join and remove, or to make the heat insulation panel openable and closable. It is.

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

In addition, as a heat insulation panel other than a vacuum heat insulation panel, the heat insulation panel which has a heat insulation member which does not contain a vacuum heat insulating material but contains at least one of a porous heat insulating material and a fiber heat insulating material 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 | gap by a porous structure or a fiber structure in the atmospheric pressure state inside. In the heat insulating container of the present disclosure, the heat transmissivity of the heat insulating panels other than the vacuum heat insulating 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 insulation 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 the 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 this indication has a core material and the exterior material which wraps a 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 interior of the exterior material 331b is in a reduced pressure state. FIG. 3B is another example of the vacuum heat insulating material. In FIG. 3A, voids are formed at both ends inside the first heat insulating material 331 that is a vacuum heat insulating material, but in FIG. 3B, no void is formed. The air gap may or may not be formed depending on the manufacturing method of the first heat insulating material 331.

  As the core material, for example, a powder, a porous body, a fiber body, or the like can be used. The powder may be an inorganic powder or an organic powder. Specifically, dry silica, wet silica, agglomerated silica powder, conductive powder, calcium carbonate powder, pearlite , Clay, talc and the like. Examples of the porous body include urethane foam, styrene foam, and phenol foam. The fiber body may be an inorganic fiber or an organic fiber, and examples of the inorganic fiber include glass fiber such as glass wool and glass fiber, alumina fiber, silica alumina fiber, silica fiber, ceramic fiber, and rock wool.

  An exterior material is a member which covers the outer periphery of a core material, for example, the flexible sheet | seat which has a heat welding layer and a gas barrier layer in this order from the core material side is mentioned. Examples of the gas barrier layer include a metal foil, a vapor deposition sheet having a vapor deposition layer on one side of a resin sheet, and the like. Examples of the metal foil include aluminum. Examples of the vapor deposition layer include aluminum, aluminum oxide, and silicon oxide. A known resin sheet can be used as the 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, and 5 mW · m ^−1. -K- ¹ or less may be sufficient.

(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, and a vacuum heat insulating material (first heat insulating material) and other The member which has a heat insulating material (2nd heat insulating material) may be sufficient. As described above, the vacuum heat insulating material (first heat insulating material) has a large performance deterioration at the time of breakage, but by using it together with other heat insulating materials (second heat insulating material), the vacuum heat insulating material (first heat insulating material) The deterioration of the heat insulation property of the heat insulation panel at the time of breakage can be suppressed.

  FIG. 4 is a schematic cross-sectional view illustrating a vacuum heat insulating member in the present disclosure. As shown in FIG. 4A, the vacuum heat insulating member 350A includes a first heat insulating material 331 that is a vacuum heat insulating material and a second heat insulating material 332 that is located on one main surface side of the first heat insulating material 331. You may do it. 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 that bonds both of them may be provided between the first heat insulating material 331 and the second heat insulating material 332.

  Examples of the second heat insulating material include porous heat insulating materials such as foam heat insulating materials and fiber heat insulating materials. Examples of the porous heat insulating material and fiber heat insulating material include foamed plastic heat insulating materials such as foamed polyethylene, foamed polypropylene, foamed polystyrene, foamed polyurethane, and foamed polyphenol, glass wool, glass fiber, rock wool, cellulose fiber, insulation board, and the like. Natural heat insulating materials such as fiber heat insulating materials, wool, carbonized cork and the like.

  Moreover, although the vacuum heat insulating member 350A shown in FIG. 4A does not have the second heat insulating material 332 on the end face of the first heat insulating material 331, as shown in FIG. You may have the 2nd heat insulating material 332 so that the both end surfaces of the one heat insulating material 331 may be covered. Although not shown, only one end surface of the first heat insulating material 331 may be covered with the second heat insulating material 332. Further, a part of the end surface of the first heat insulating material 331 may be covered with the second heat insulating material 332, and the whole end surface of the first heat insulating material 331 may be covered with the second heat insulating material 332. .

  The vacuum heat insulating member 350A shown in FIG. 4A 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 331 has a second heat insulating material 331 on both main surface sides. The heat insulating material 332 may be included. Further, as illustrated in FIG. 4C, the vacuum heat insulating member 350 </ b> A may include 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 insulating sheet so as to cover the entire circumference of the first heat insulating material. For example, as illustrated in FIG. 4D, the vacuum heat insulating member 350 </ b> A may include a heat insulating 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 insulating sheet 333 via the second heat insulating material 332.

  Examples of the heat shielding sheet include a multilayer sheet including a metal foil, and a vapor deposition sheet having a vapor deposition layer on one side of a resin sheet. 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 shield sheet, the heat insulating property of the heat insulating member is further improved. Furthermore, as will be described later, the airtightness of the heat insulating container can be improved.

(Iii) Protection member The vacuum heat insulation panel in this indication is a heat insulation panel which has at least the vacuum heat insulation member mentioned above, and may further have a protection member which protects a vacuum heat insulation member. FIG. 5 is a schematic cross-sectional view illustrating a vacuum thermal 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. A vacuum heat insulating panel 350 shown in FIG. 5A has a second heat insulating member 332 on one main surface side of the first heat insulating material 331, and a protective member 350B on the other main surface side of the first heat insulating material 331. Have. On the other hand, as shown in FIG.5 (b), the vacuum heat insulation panel 350 may have the protection member 350B so that the perimeter of the vacuum heat insulation member 350A may be covered. Although not shown, the vacuum heat insulation panel may have the above-described heat shield sheet so as to cover the entire circumference of the protective member 350B shown in FIG. 5B, for example.

  Examples of the protective member include organic polymer members such as plywood, foamed material, resin plate, embossed resin sheet, and paperboard, and ceramic members. In addition, as a lightweight and relatively rigid material, for example, plastic cardboard or cured wood can be used. Or you may use the same thing as the 2nd heat insulating material mentioned above.

(Iv) Vacuum heat insulating panel The vacuum heat insulating panel in the present disclosure preferably has a low heat transmissivity, for example, 0.5 W / m ² K or less.

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

  Here, the measuring method of the heat transmissivity in a heat insulation panel is demonstrated. For example, the thermal resistance value of the heat insulation panel itself may be obtained (first measurement method). Further, for example, a test heat insulation panel having the same layer configuration as the heat insulation panel to be measured and having a surface perpendicular to the thickness direction of 30 cm × 30 cm or more is manufactured, and the heat of the test heat insulation panel is measured. The resistance value may be obtained (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 total thermal resistance value of each member may be obtained from the thickness and thermal conductivity of each member (third measurement). Method). The thermal resistance value and the thermal conductivity are determined in accordance with JIS A1412-1, 2,3. The temperature of the measurement environment is 20 ° C. or higher and 25 ° C. or lower. In addition, it is preferable to employ | adopt the 1st measuring method which is a direct measuring method first as a measuring method of a heat transmissivity, and when it is difficult to employ | adopt a 1st measuring method, a 2nd measuring method is employ | adopted. It is preferable to adopt the third measurement method when it is difficult to adopt the second measurement method. In addition, when a heat insulation panel has several area | regions from which a heat transmissivity differs, it is preferable to use the average heat transmissivity which considered the ratio for which an area | region occupies.

A third measurement method is illustrated. For example, the case where a vacuum heat insulation panel has a 1st heat insulating material (vacuum heat insulating material) and a 2nd heat insulating material (EPP: foamed polypropylene) is assumed. 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 thermal resistance value is 0.006 / 0. 003 = 2 (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. 04 = 1/2 (m ² K / W). Therefore, the thermal conductivity of the vacuum heat insulating panel having the first heat insulating material and the second heat insulating material is 1 / (2 + 1/2) = 0.4 (W / m ² K) from the equation (1).

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

The vacuum heat insulation panel may have a means for improving the heat insulation properties of the heat insulation panel. For example, as shown to Fig.6 (a), it is preferable that the 1st heat insulating material 331 which is a vacuum heat insulating material is formed in one so that it may cover the whole region of a vacuum heat insulating member in the width direction. For example, when the size of the heat insulating container is increased, one side of the heat insulating panel is also increased. Even in such a case, it is preferable that the first heat insulating material 331 that is a vacuum heat insulating material is formed as one. 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 FIG. 6B, 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 insulating materials in plan 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, as shown in FIG. 6C, for example, 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 insulating members 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 another 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 improving means In the heat insulating container of the present disclosure, the number of ventilations in the assembled state is preferably not more than a predetermined value. The means for reducing the number of ventilations of the heat insulation container (means for improving the airtightness of the heat insulation container) is not particularly limited as long as the target number of ventilations can be obtained, and any means can be adopted.

As an example of the airtightness improving means, for example, a means for improving the airtightness of the joint portion between the two vacuum heat insulating panels can be cited. 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, the airtightness in the region X is improved by bringing the second heat insulating materials 332 into contact with each other in the region X. The two second heat insulating materials that come into contact with each other may be the same heat insulating material or different heat insulating materials.

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 located on the end surface of the first heat insulating material 331 in the vacuum heat insulating panel V ₁ and the heat insulating sheet 333 located on the main surface of the first heat insulating material 331 in the vacuum heat insulating panel V ₂ are in contact. It is preferable. In FIG.7 (b), in the area | region X, the airtightness in the area | region X improves by making the heat shield sheets 333 contact each other. Note that the two heat shield sheets that come into contact with each other may be the same material sheet or different material sheets. Moreover, although not shown in figure, in the area | region X, the heat shield sheet 333 and the 2nd heat insulating material 332 may be contacting.

Further, for example, as shown in FIG. 7C, the heat insulating member includes a first surface fastener portion 335a, a second surface fastener portion 335b that 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 Are preferably attracted by magnetic force. In FIG.7 (d), the airtightness in the area | region X improves with magnetic force.

  Moreover, as will be described later, by arranging a vertical frame or a horizontal frame in the heat insulating container, the airtightness of the joint portion of the two vacuum heat insulating panels can be improved.

3. Assembled state and disassembled state The insulated container of the present disclosure can be changed between an assembled state and a disassembled state. The assembled state means a state where a heat insulating space surrounded by the top heat insulating panel, the bottom heat insulating panel, and the plurality of side surface heat insulating panels is formed, and the disassembled state means a state where the heat insulating space is not formed. . The insulated container of the present disclosure can be changed from the assembled state to the disassembled state, and can be changed from the disassembled state to the assembled state. The disassembled state includes a state in which at least one heat insulating panel is separated (separated state) and a state in which two or more heat insulating panels are folded while being joined via some member (folded state).

  The insulated container of the present disclosure can be stored or transported in a small state by being separated and overlapped or folded. Moreover, since the heat insulation is good even if the vacuum heat insulating material is thin, the use of the vacuum heat insulating material can further reduce the size of the heat insulating container in a disassembled state. Furthermore, by using a vacuum heat insulating material, the heat insulation panel can be reduced in weight, and the internal volume of the heat insulation container in an assembled state can be increased.

Here, the outer volume of the insulated container in the assembled state and _{V A,} in the case where the internal volume was _{V B,} is defined as a size-reduction index _{= (V A -V B) /} V A. The outer volume V _A is a volume calculated from the outer shape of the assembled heat insulating container, and the inner volume V _B is a volume calculated from the inner shape (heat insulating space) of the assembled heat insulating container and stores articles. The maximum volume possible. Note that (V _A -V _B ) in the miniaturization index corresponds to the outer volume of the heat insulating container in an ideal disassembled state (a state in which the heat insulating panels are stacked so that the inner volume becomes 0). By dividing the value of (V _A −V _B ) by the outer volume _VA of the heat insulating container in the assembled state, it becomes an index for downsizing when the assembled state is changed to the disassembled state.

The value of (V _A −V _B ) / _VA may be, for example, 1/3 or less, or 1/4 or less. When the value of (V _A −V _B ) / _VA is 1/3, the outer volume of one heat insulating container in an assembled state and the outer volume of three heat insulating containers in a disassembled state are the same. Therefore, for example, it is possible to store or transport in a state where three disassembled heat insulating containers are placed on a pallet on which one heat insulating container in an assembled state is placed. In terms of _downsizing, preferably as the smaller value of _{(V A -V B) / V} A.

4). Thermal insulation container The thermal insulation container of this indication has the thermal insulation space surrounded by the top surface thermal insulation panel, the bottom thermal insulation panel, and the plurality of side thermal insulation panels in the assembly state. The volume of the heat insulation space usually corresponds to the inner volume of the heat insulation container. In the assembled state, the inner volume of the heat insulating container is preferably 0.2 m ³ or more, for example. When the inner volume of the heat insulating container is 0.2 m ³ or more, there is a case where downsizing is required when not in use.

Moreover, since the heat insulation container of this indication has good heat insulation at the time of use and can be reduced in size when not in use, there is an advantage that it can be applied to a large heat insulation container. Furthermore, a large insulated container has an advantage that more items can be stored or transported. Further, as the inner volume of the insulated container is large, the insulating panel thickness is the value of _{(V A -V B) / V} A when the same small, there is an advantage that more can be miniaturized. Therefore, the internal volume of the heat insulating container can be 0.3 m ³ or more, 0.5 m ³ or more, or 0.8 m ³ or more. Note that the inner volume of the heat insulating container can be set to 8.0 m ³ or less so that the assembling work and the disassembling work can be easily performed.

  Moreover, the heat insulation container of this indication may enable an at least 1 heat insulation panel of a top | upper surface heat insulation panel, a bottom face heat insulation panel, and a some side surface heat insulation panel to form an opening part in an assembly state. At least one of the heat insulating panels may be capable of forming an opening with the whole heat insulating panel, or may be capable of forming an opening with a part of the heat insulating 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 portions, and one of the two heat insulation panel portions 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. In addition, each of the two heat insulation panel parts of the front cross-section panel 150 of the heat insulation container 100 shown in FIG. 1 and each of the two heat insulation panel parts of the top | upper surface heat insulation panel 160 have a vacuum heat insulation member containing a vacuum heat insulating material. Yes.

  Furthermore, in the present disclosure, it is preferable that at least two of the top heat insulating panel, the bottom heat insulating panel, and the plurality of side heat insulating panels can form openings. This is because workability related to taking in and out of articles is improved. In the present disclosure, one continuous opening may be formed by at least two of the top heat insulating panel, the bottom heat insulating panel, and the plurality of side heat insulating panels. Since a wide opening can be formed, workability relating to taking in and out of articles is improved.

  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 insulated container of the present disclosure as described above. FIG. 8 is a schematic perspective view illustrating a state where each heat insulation panel of the heat insulation container shown in FIG. 1 is removed. FIG. 9 is a schematic perspective view illustrating a state in which the heat insulation panels removed in FIG. 8 are stacked (a heat insulation container in an exploded state). FIG. 10 is a schematic perspective view illustrating a state in which the heat insulating containers illustrated in FIG. 1 are stacked in two stages.

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

  As shown in FIG. 8, the front heat insulation panel 150, the left heat insulation panel 130, the back heat insulation panel 140, and the right heat insulation panel 120, which are the side heat insulation panels 110, are respectively protective members 150B, 130B, 140B, 120B, and a vacuum heat insulation member 150A. , 130A, 140A, 120A. The top heat insulation panel 160 includes a protection member 160B and a vacuum heat insulation member 160A. The bottom heat insulating panel 170 includes a vacuum heat insulating member 170A. Although not shown, each of the vacuum heat insulating members includes a vacuum heat insulating material.

  As shown in FIG. 1 and FIG. 8, the right heat insulation panel 120, the left heat insulation panel 130, and the front heat insulation panel 150 are on the left and right ends of the heat insulation panel, respectively. The vertical frame 310 is continuously extended from the end of the bottom to the bottom heat insulating panel side which is the lower side of the heat insulating panel. Although not shown, the rear heat insulating panel 140 is the same. Since the heat insulating panels joined in the assembled state are hardly moved by the vertical frame 310, the airtightness is improved. The vertical frame 310 serves as a column or wall that supports the weight of the heat insulating panel and the load from the top surface side. The vertical frame may be made of metal or non-metal such as plastic or wood. By using a metal vertical frame, it is possible to further improve the load resistance of the heat insulating container and make it difficult to lower the airtightness. When a metal vertical frame is used, by disposing the vertical frame on the protection member, the metal vertical frame does not come into contact with the heat insulating space 300, and a decrease in heat insulation of the heat insulating container can be suppressed.

  As shown in FIG. 1 and FIG. 8, the right heat insulation panel 120, the left heat insulation panel 130, and the front heat insulation panel 150 are respectively provided on the upper and lower ends of the heat insulation panel from the right end of the heat insulation panel. A horizontal frame 320 is provided that extends continuously to the left end. The front heat insulation panel 150 also includes a horizontal frame (not shown) that extends continuously from the right end of the heat insulation panel to the left end of the heat insulation panel near the center of the heat insulation panel. Furthermore, the top heat insulating panel 160 includes a horizontal frame 320 that extends continuously from one end of the heat insulating panel to the other end at the upper, lower, left, and right ends of the heat insulating panel. ing. Since the heat insulation panels joined in the assembled state are hardly moved by the horizontal frame 320, the airtightness is improved. The horizontal frame may be made of metal or non-metal such as plastic or wood. By using a metal horizontal frame, it is possible to further improve the load resistance of the heat insulating container and make it difficult to lower the airtightness. When a metal horizontal frame is used, since the metal horizontal frame does not contact the heat insulating space 300 by disposing the horizontal frame on the protective member, it is possible to suppress a decrease in heat insulation of the heat insulating container.

  On the other hand, as shown in FIG. 9, in the heat insulating container 100 in the disassembled state, for example, the bottom heat insulating panel 170 having the vacuum heat insulating member 170A is placed, and the left heat insulating panel 130 is placed on the bottom heat insulating panel 130 and the lower side is the vacuum heat insulating member 130A. The upper surface is overlaid in the direction to be the protective member 130B, and the back heat insulating panel 140 is overlaid thereon in the direction to be the protective member 140B on the lower side and the vacuum heat insulating member 140A on the upper side. Further, the right heat insulation panel 120 is overlaid in such a direction that the lower side becomes the vacuum heat insulation member 120A and the upper side becomes the protection member 120B, and the front heat insulation panel 150 is further laminated on the lower side with the protection member 150B and the upper side. Are stacked in a direction to be the vacuum heat insulating member 150A, and finally, the top heat insulating panel 160 is stacked in a direction to be the vacuum heat insulating member 160A on the lower side and the protective member 160B on the upper side. A vacuum heat insulating material can be protected by using the uppermost side of the heat insulation container 100 of a decomposition | disassembly state as a protection member.

  Moreover, as shown in FIG. 1 and FIG. 8, when the heat insulation container 100 is provided with the vertical frame 310, it is from the top | upper surface side which the heat insulation of the side heat insulation panel or the heat insulation container of the lower stage of the two-stage heat insulation container receives. The load can be supported, and it is possible to prevent the heat-insulating panels from moving due to their own weight or excessive weight in an assembled state, thereby reducing the airtightness or damaging the vacuum heat insulating material. Specifically, by providing the vertical frame 310, as shown in FIG. 10, the insulating container 100A having the same specifications may be stored and transported in a state of being stacked on the upper side. In order to further improve the load resistance and make it difficult to reduce the airtightness, a horizontal frame can be provided in addition to the vertical frame.

  In addition, the heat insulation container of this indication may be equipped with the pallet and does not need to be provided. In the former case, the pallet is preferably located on the panel surface side opposite to the heat insulating space of the bottom heat insulating panel of the heat insulating container. Since the insulated container with a pallet can be easily moved by a forklift, a handlift or the like, the risk of accidentally damaging the vacuum insulation during the moving operation is reduced. The bottom heat insulating panel of the heat insulating container may be joined to the pallet or may be separable from the pallet.

6). Others Another example of the heat insulating container will be described with reference to FIGS. 11 and 12. FIG. 11 is a schematic perspective view illustrating the assembly process of the heat insulating container of the present disclosure. FIG. 12 is a schematic perspective view illustrating a state in which the heat insulating container described in FIG. 11 is arranged in the transport basket.

  As shown in FIG. 11 (a), the heat insulating container 100 in a disassembled state (folded state) has a front heat insulating panel 150, a right heat insulating panel 120, a rear heat insulating panel 140, a bottom heat insulating panel 170, in order from the right side (+ Y side). The top heat insulating panel 160 and the left heat insulating panel 130 are stacked, and the upper surface (+ Z) of the laminate of the right heat insulating panel 120, the back heat insulating panel 140, the bottom heat insulating panel 170, the top heat insulating panel 160, and the left heat insulating panel 130. The exterior member 180 is disposed so as to surround the side surface, the bottom surface (the −Z side surface), the left and right side surfaces (the + Y and −Y side surfaces), and the back surface (the −X side surface). Further, a part of the top surface, bottom surface, and back surface of the exterior member 180 is 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 to Fig.11 (a), the left surface heat insulation panel 130 is moved to the left side (-Y side) (arrow A), and the upper surface, bottom surface, and back surface 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 arranged along the top surface of the exterior member 180. Further, the bottom heat insulating panel 170 is opened to the lower left side (arrow C), and is arranged along the bottom surface of the exterior member 180. Further, the rear heat insulation panel 140 laminated on the right heat insulation panel 120 is tilted to the left rear side (arrow D) with the rear side (-X side) edge serving as a fulcrum, and the exterior (arrow D). It arrange | positions so that the back surface of the member 180 may be followed. Finally, as shown in FIG. 11C, the front heat insulation panel 150 folded over the right heat insulation panel 120 is folded back (arrow E) to complete the heat insulation container 100. In this way, it is possible to change from the disassembled state (folded state) to the assembled state. Moreover, it is also possible to change from the assembled state to the disassembled state (folded state) by the reverse procedure.

  A heat insulating container 100 shown in FIG. 11 is a vacuum heat insulating panel having a vacuum heat insulating member including a vacuum heat insulating material, a right heat insulating panel 120, a left heat insulating panel 130, a back heat insulating panel 140, a top heat insulating panel 160, and a bottom heat insulating panel 170. is there. Further, the heat insulating container 100 having a structure in which the front heat insulating panel 150 can be partially opened and closed is in an assembled state of a quadrangular prism structure when the front heat insulating panel 150 is closed, and heat insulation surrounded by the heat insulating panel. A space can be formed inside the container. Moreover, in the heat insulation container 100 shown in FIG. 11, the ventilation frequency is below a specific value in an assembly state.

  As shown in FIG. 12, the heat insulating container 100 described in FIG. 11 is arranged on a transporting basket 250, and the heat insulating container 100 containing articles can be freely transported by the transporting car 250. A transport basket 250 shown in FIG. 12 includes a cart unit 251 on which the heat insulating container 100 is placed, a fence unit 252 that holds opposite side surfaces of the heat insulating container 100, and wheels 251 a that are located at each corner of the cart unit 251. Have

  The outer peripheral shape and dimensions of the heat insulating container of the present disclosure are not particularly limited. As for the heat insulation container of this indication, each dimension may be a cm order, and one or more of each dimension may be a thing of 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 viewed from the top surface side, the vertical width and the horizontal width are each 1000 mm or more and 1200 mm or less, and the vertical width is 1119 mm or more. And a quadrilateral whose width is 916 mm and 1116 mm or less at 1319 mm or less, a quadrilateral whose width is 1100 mm or more and 1300 mm or less and whose width is 900 mm or more and 1100 mm or less, and whose width is 1100 mm or more and 1300 mm or less and whose width is 700 mm or more and 900 mm The following quadrilaterals having a vertical width and a horizontal width of 1065 mm or more and 1265 mm or less can be exemplified. By making the shape of the side heat insulation panel suitable for the shape of the standard pallet in each country, the efficiency of transportation and storage can be improved. In addition, as height of the outer periphery shape of the side surface heat insulation panel of a heat insulation container, it can be set to 300 mm or more, for example, may be 500 mm or more, and may be 700 mm or more. Moreover, as an outer peripheral shape of the side heat insulation panel of the heat insulation container, for example, when the heat insulation container in an 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 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 transportation of the goods which require cold preservation or heat insulation, for example in the field of physical distribution.

7). Experimental Example One specific example of the heat insulating container of the present disclosure was prepared, and the ventilation frequency and the cold insulation time were measured by the above-described method. In this specific example, the heat insulating container has the configuration shown in FIGS. 1 and 2 and has a rectangular parallelepiped shape in which the inner dimension of one side is 1010 mm long × 1010 mm wide × 740 mm high. In each vacuum insulation panel of the heat insulation container, a vacuum insulation material having a thickness of 6 mm as the first insulation material (glass wool as the core material, thermal conductivity 0.003 W / mK), and a foam insulation material having a thickness of 15 mm as the second insulation material (XPS) : Extruded urethane, thermal conductivity 0.036 W / mK), and a plastic sheet with an aluminum vapor deposition layer having a thickness of 1 mm was used as a heat shield sheet covering the entire circumference of the first heat insulating material and the second heat insulating material. In the heat insulating container, a polyethylene sheet having a thickness of 1 mm was used as the protective member, and aluminum was used as the vertical and horizontal frames. The measured value of the ventilation frequency of the insulated container by the above method is 0.034 times / hr, the measured value of the cooling time of 75.5 kg of water by the above method is 13.6 hr, and the insulated container has good insulation. It was confirmed to show sex.

  In addition, this indication is not limited to the said 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 and exhibits the same function and effect in any case. It is included in the technical scope of the disclosure.

B. Simulation Hereinafter, the relationship between the cold insulation time and the ventilation frequency by simulation will be described.

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

The amount of heat 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 formula (2).
q _A = U × L × T × 3600 Formula (2)
Here, U is the average of the thermal conductivity [W / m ² K] of each heat insulating panel constituting the heat insulating container, L is the surface area [m ² ] on the inner side of the heat insulating container, and T is The temperature difference [K] between the inside and outside of the heat insulating container.

The amount of heat q _B [J / hr] per unit time flowing in through a gap such as between the heat insulation panels of the heat insulation container can be expressed by the following formula (3).
q _B = D × V × a × C × T Formula (3)
Here, D is the number of ventilations [times / hr], V is the internal volume [m ³ ] of the heat insulating container, a is an environmental coefficient, and C is the heat capacity [J / m ³ ] of air. K], and T is the temperature difference [K] between the inside and the outside of the heat insulating container. In this simulation, the environmental coefficient was 5.34, the specific heat capacity of air was 1.0 J / gK, and the density of air was 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 inside of the heat insulation container and the wind speed outside the heat insulation container. This is because the movement of air flowing in through the gaps between the insulation panels of the insulation container is affected not only by the factors of the insulation container itself, such as the size and shape between the insulation panels, but also by environmental factors. . The environmental coefficient a was determined by the following procedure. The insulated container was installed in a sealed room without temperature control, and the normal ventilation frequency of the insulated container was measured. An insulated container with a cold insulation material inside and kept at about 10 ° C. is set to 35 ° C. to 40 ° C. (no humidity control), and is installed in a ventilated environmental test chamber. The ventilation rate of the test was measured. The environmental coefficient was obtained by dividing the ventilation frequency of the environmental test of the insulated container by the normal ventilation frequency of the insulated container.

The heat insulation container set the cube (inside surface area L is 6 m < ² >, internal volume V is 1 m < ³ >) whose inner dimension of 1 side was surrounded by the heat insulation panel in all the surfaces. The heat insulating panel is made of extruded expanded polystyrene (XPS, thermal conductivity 0.036 W / mK, thickness 15 mm), vacuum heat insulating material (thermal conductivity 0.003 W / mK, thickness 5 mm), extruded expanded polystyrene (XPS, thermal conductivity). A three-layer structure having a rate of 0.036 W / mK and a thickness of 15 mm was set. In addition, the heat transmissivity U of this heat insulation panel is 0.4 (W / m < ² > K).

  The heat insulation container is used in a state where 8 kg of a cold insulating material (latent heat amount per unit weight of 320 kJ / kg) is placed inside the heat insulation container, and the heat insulation container is installed in an environment where the temperature difference between the inside and the outside of the heat insulation container is 30K. Set the status. In addition, this setting can assume the state by which the heat insulation inside is hold | maintained by the cold storage material (0 degreeC-5 degreeC) with a cold storage material in the summer of Japan (temperature 30 degreeC-35 degreeC), for example.

  From the above, a simulation was performed on the relationship between the cool time and the number of ventilations. The cold insulation time t [hr] was the time when the heat quantity Q [J] flowing from the outside to the inside of the heat insulation container reached the latent heat quantity 2560 kJ of the cold insulation material inside the heat insulation container. Set the ventilation frequency in the range of 0.001 times / hr to 10 times / hr with almost no bias on the logarithmic axis, calculate the cooling time for each set ventilation frequency, and find the approximate curve by the least square method from the calculated value It was.

  FIG. 13 shows the result of a simulation in which the thickness of the vacuum heat insulating material is 5.0 mm. When the ventilation frequency was 0.1 times / hr, a cold insulation time close to that when the ventilation frequency was 0.001 times / hr (when the airtightness was extremely high) could be realized. On the other hand, when the ventilation frequency is greater than 0.1 times / hr, the cooling time decreases significantly as the ventilation frequency increases. That is, when the ventilation frequency is greater than 0.1 times / hr, a slight change in the ventilation frequency (air tightness) has a large effect on the cooling time, but when the ventilation frequency is less than 0.1 times / hr, Even if the number of ventilations (hermeticity) fluctuated somewhat, there was little effect on the cooling time, 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 is the same even when the thickness of the vacuum heat insulating material is changed as shown in FIG. The simulation conditions are the same except that the thickness of the vacuum heat insulating material is changed. 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 mm for d. .5 mm, e is 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 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 simulation results, it can be seen that the performance of the heat insulating container using the vacuum heat insulating material is sufficiently exerted by the heat insulating container having a ventilation frequency of 0.1 times / hr or less. That is, in the heat insulating container that can change the assembled state and the disassembled state and that uses a vacuum heat insulating material, the heat insulating container that has a ventilation frequency of 0.1 times / hr or less It was confirmed that it is important in suppressing the deterioration of the heat insulation property.

  On the other hand, in FIG. 13, when the ventilation frequency was 0.02 times / hr, the cooling time was almost the same as when the ventilation frequency was 0.001 times / 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 is the same even when the thickness of the vacuum heat insulating material is changed as shown in FIG. That is, when improving the heat insulating property of the heat insulating container, it is effective to improve the heat insulating property of the heat insulating panel rather than lowering the ventilation frequency to less than 0.02 times / hr (rather than excessively increasing the airtightness). It was suggested that

  Further, as shown in FIGS. 15 and 16, the rate of change in the cooling time in the common logarithm of the ventilation frequency is obtained from the slope of each curve in FIGS. 13 and 14. Since the rate of change in the cooling time in the common logarithm of the ventilation frequency is small in the thermal insulation container in which the rate of change in the cooling time in the common logarithm of the ventilation frequency is -1, the heat insulation performance of the heat insulation panel is appropriately exhibited. It can be said that it is in a state. Therefore, from the viewpoint of exerting the heat insulating properties of the heat insulating panel, it is preferable to set the ventilation frequency at which the change rate of the cold insulation time in the common logarithm of the ventilation frequency is -1 as the upper limit of the ventilation frequency of the heat insulating container including the heat insulating panel. .

  Also, considering only the effect of airtightness, the thicker the vacuum insulation material, the lower the target ventilation frequency. At first glance, the thicker the vacuum insulation material, the higher the airtightness is required. . However, in practice, the thicker the vacuum heat insulating material, the better the heat insulating property of the heat insulating panel and the heat insulating property as a heat insulating container. 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 insulation time is as long as 17 hours. The thickness is 10.0 mm, and the cooling time is longer than when the ventilation frequency is 0.001 times / hr. Thus, the thicker the vacuum heat insulating material, the more the influence of the heat insulating property of the heat insulating panel becomes, and the heat insulating property as a heat insulating container is improved.

  Table 1 shows details of the relationship between the number of ventilations and the cooling time.

The thickness of the vacuum insulation material correlates with the thermal conductivity of the thermal insulation panel. If the thermal conductivity of the vacuum thermal insulation material is the same, the greater the thickness of the vacuum thermal insulation material, the lower the thermal conductivity of the thermal insulation panel. . For example, in this simulation, the thermal conductivity of the heat insulation panel for obtaining a heat insulation container having a cold insulation time of 7 hours or more is 0.5 W / m ² K or less.

(Relationship between insulation panel thickness, insulation container volume and downsizing index)
The relationship between the heat insulation panel thickness, the volume of the heat insulation container, and the miniaturization index was evaluated. When the outer volume of the heat insulating container in the assembled state is _VA and the inner volume is V _B , the size reduction index is defined as (V _A −V _B ) / _VA .

For example, when assuming a cube having a side length of 100 cm and a heat insulation panel thickness of 10 mm (1 cm), the outer volume V _A of the heat insulation container is 1 m ³ (1000 L). On the other hand, the internal volume V _B of the heat insulating container is (1.00− (0.01 × 2)) ³ = 0.94 m ³ (940 L). 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 insulating 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 insulating panel and the length of one side of the heat insulating container (the length of one side of the heat insulating panel). For example, when trying 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, when trying to reduce the size when not in use, it is necessary to reduce the thickness of the heat insulating panel, and when the thickness of the heat insulating panel is reduced, the heat insulating property of the heat insulating panel is likely to be lowered. Although it is possible to increase the heat insulation property of the heat insulation panel by using the vacuum heat insulating material, when using the vacuum heat insulating material, as described above, the properties specific to the vacuum heat insulating material (thin thickness is thin and workability is low). The airtightness of the heat-insulating container is likely to be lowered due to the low nature of the performance deterioration at the time of breakage). Therefore, when it is going to obtain the heat insulation container which can be reduced in size at the time of non-use, it is necessary to pay attention to airtightness more.

DESCRIPTION OF SYMBOLS 100 ... Thermal insulation container 110 ... Side surface thermal insulation panel 110A ... Vacuum thermal insulation member 110B ... Protection member 120 ... Right side thermal insulation panel 130 ... Left side thermal insulation panel 140 ... Back thermal insulation panel 150 ... Front thermal insulation panel 160 ... Top thermal insulation panel 170 ... Bottom thermal insulation panel 310 ... Vertical frame 320 ... Horizontal frame 331 ... First heat insulating material 331a ... Core material 331b ... Exterior material 332 ... Second heat insulating material 333 ... Heat shield sheet 334 ... Adhesive layer

Claims (6)

The assembly state and the disassembly state can be changed, and a heat insulating container using a vacuum heat insulating material,
The heat insulating container has a plurality of side heat insulating panels including a top heat insulating panel, a bottom heat insulating panel, and a right heat insulating panel, a rear heat insulating panel, a left heat insulating panel, and a front heat insulating panel.
The assembled state is a state in which a heat insulating space surrounded by the top heat insulating panel, the bottom heat insulating panel, and the plurality of side heat insulating panels is formed,
The decomposition state is a state where the heat insulation space is not formed,
At least four of the top heat insulating panel, the bottom heat insulating panel, and the plurality of side heat insulating panels have a vacuum heat insulating member including the vacuum heat insulating material,
The insulated container whose ventilation frequency is 0.1 times / hr or less in the said assembly state. The assembly state and the disassembly state can be changed, and a heat insulating container using a vacuum heat insulating material,
The heat insulating container has a plurality of side heat insulating panels including a top heat insulating panel, a bottom heat insulating panel, and a right heat insulating panel, a rear heat insulating panel, a left heat insulating panel, and a front heat insulating panel.
The assembled state is a state in which a heat insulating space surrounded by the top heat insulating panel, the bottom heat insulating panel, and the plurality of side heat insulating panels is formed,
The decomposition state is a state where the heat insulation space is not formed,
At least four of the top heat insulating panel, the bottom heat insulating panel, and the plurality of side heat insulating panels have a vacuum heat insulating member including the vacuum heat insulating material,
In the assembled state, the number of ventilations is a heat-insulating container that is equal to or less than a value at which the rate of change in the cold insulation time in the common logarithm of the ventilation number is -1. 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. In the assembled state, the outer volume of the insulated container and _{V A,} in the case where the internal volume was _{V B,} is 1/3 or less the value of _{(V A -V B) / V} A, from claim 1 The heat insulation container according to any one of claims up to claim 3.   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 flow rate of the said heat insulation panel which has the said vacuum heat insulation member containing each said vacuum heat insulating material is 0.5 W / m < ² > K or less, The claim in any one of Claim 1-5 The insulated container as described.