TWI524041B - An insulated box, and a refrigerator and a drinking water storage device provided with the insulated cabinet - Google Patents

Description

Insulation box and refrigerator and drinking water storage device provided with the same

The present invention relates to a heat insulating box filled with a hard amine urethane foam and a vacuum heat insulating material, and a refrigerator and a drinking water storage device including the heat insulating box.

In recent years, from the perspective of the safety of the global environmental protection and nuclear power plants, various measures have been taken to save resources, save energy, and save power.

In the perspective of energy saving and power saving, a technology is proposed, which is

In the heat-insulating box in which the outer box and the inner box are formed, in addition to the hard amine urethane foam, a vacuum heat insulating material is also provided, for example, a heat insulating box body is proposed, which is "flexible" A hard amine urethane foam and a vacuum heat insulating material having a coefficient of 8.0 MPa or more and a density of 60 kg/m ³ or less to ensure rigidity and heat insulating properties, and the coverage of the vacuum heat insulating material exceeds the surface area of the outer box 50%" (refer to Patent Document 1).

[Prior patent documents] [Patent Literature]

[Patent Document 1] Japanese Patent No. 3478810

Vacuum insulation material is compared with the previous hard amine foam The heat insulating property has, for example, a heat insulating property of 6 times or more. Therefore, from the viewpoint of energy saving, a vacuum heat insulating material is disposed in addition to the hard amine urethane foam in the space formed between the outer box and the inner box. In addition, in recent years, as the heat-insulating box described in Patent Document 1 is shown, the amount of vacuum heat insulating material disposed in the heat insulating box is gradually increased.

On the other hand, in recent years, from the viewpoint of saving space or increasing the capacity of the internal volume, it is also required to form a space between the outer box and the inner box, that is, a reduction in the wall thickness of the heat insulating box. However, the conventional heat insulation box system is mainly made up of a heat insulating function by a hard urethane foam, and a vacuum heat insulating material is a technical idea of assisting the heat insulating performance of a hard urethane foam. In other words, the conventional heat insulation box system uses a hard amine urethane foam to ensure the strength of the wall surface. Therefore, if the wall thickness of the heat insulating box is to be reduced, the amount of filling of the hard urethane foam is also reduced due to the reduction in the wall thickness of the heat insulating box, so that the heat insulating performance of the heat insulating box is insufficient or Insufficient strength. Therefore, in the conventional heat insulating box, there is a problem that it is difficult to reduce the wall thickness.

Here, in the heat insulating box described in Patent Document 1, it is also considered that the amount of use of the vacuum heat insulating material (the coverage ratio) is increased, and the bending elastic modulus of the hard urethane foam is increased (in other words, The rigidity of the hard amine urethane foam is so that the wall thickness can be slightly reduced. However, the heat insulating box described in Patent Document 1 is also produced according to the conventional technical concept, and the hard amine foam is mainly used as a heat insulating function, and the vacuum heat insulating material is a hard amine urethane foam. Thermal insulation properties. In other words, in the heat insulating box described in Patent Document 1, the strength of the wall surface is secured by the hard urethane foam. Therefore, in order to suppress the thermal insulation performance of the hard amine urethane foam, the hard amine carboxylic acid cannot be used. The flexural modulus of the ethyl ester foam is set to be 10.0 MPa or more. Therefore, in the heat insulating box described in Patent Document 1, in order to secure the strength of the wall surface, it is necessary to secure a certain amount of the hard urethane foam filled in the space between the outer box and the inner box. It is difficult to reduce the problem of wall thickness.

In other words, in the conventional heat insulating box system, it is difficult to ensure the heat insulating performance, and the internal volume of the heat insulating box is further enlarged.

The present invention has been made in order to solve the problems as described above, and an object of the present invention is to provide a heat insulating box that can expand the internal volume of the heat insulating box while maintaining heat insulating performance, and that has the heat insulating box. Refrigerator and drinking water storage device.

The heat insulation box system of the present invention comprises: an outer box and an inner box; and a vacuum heat insulating material and a hard urethane foam filled in a first space formed between the outer box and the inner box; at least The vacuum heat insulating material is mounted on the left and right side surface portions and the back surface portion, and the filling rate of the vacuum heat insulating material in the first space is 40% to 80%, and the area percentage of the vacuum heat insulating material on the outer surface of the outer box is 60% or more. The flexural modulus of the hard urethane foam is 15.0 MPa or more.

Further, the refrigerator of the present invention includes: the heat insulating box of the present invention; and a cooling device for cooling air supplied to the storage chamber formed in the heat insulating box.

Moreover, the drinking water storage device of the present invention comprises: the heat insulating box of the present invention; a heating device for heating the water; and a water tank disposed in the heat insulating box and storing the water heated by the heating device.

The heat insulation box system of the present invention is developed by a new technical concept that is completely different from the conventional technical concept that the vacuum insulation material mainly serves as a heat insulation function. Therefore, in the heat insulation box system of the present invention, the filling rate of the vacuum heat insulating material in the first space formed between the outer box and the inner box is 40% to 80%, and the area percentage of the vacuum heat insulating material of the outer box surface area is 60%. Above %, the filling rate and area percentage of the vacuum insulation material are larger than ever. That is, as described above, the vacuum heat insulating material has a heat insulating performance of, for example, six times or more with respect to the heat insulating performance of the conventional hard urethane foam. Therefore, the heat insulation box system of the present invention can exhibit a sufficient heat insulating function even if the wall thickness is reduced.

Further, the flexural modulus of the hard urethane foam used in the conventional heat insulating box is, for example, about 6 MPa to 12 MPa, and the bending elastic modulus of the vacuum heat insulating material is about 20 MPa to 40 MPa. That is, the vacuum heat insulating material has a higher bending elastic modulus than the hard urethane foam used in the conventional heat insulating box. Therefore, the insulation strength of the heat insulating box system of the present invention in which the filling rate of the vacuum heat insulating material is larger than ever can be sufficiently ensured. In addition, the conventional technical concept of securing the wall surface strength of the heat insulating box by the hard urethane foam is additionally notified in advance, but the coverage of the vacuum heat insulating material in the heat insulating box is increased, and the first space is increased. The filling rate of the vacuum heat insulating material is less than 40%, and the wall thickness of the heat insulating box cannot be made thin. That is, the filling rate of the vacuum heat insulating material having a higher bending elastic modulus than the hard urethane foam is set to 40% or more, and the vacuum heat insulating material is used as the strength of the heat insulating box, which reduces the heat insulating box. It is important when the wall is thick.

Here, since the filling rate of the vacuum heat insulating material is increased, and the filling rate of the hard amine urethane foam is lowered, the adhesion between the outer box and the inner box is not As a result, it is also considered that the strength of the heat insulating box is lowered. However, as described above, the heat insulating box system of the present invention has been developed based on the technical concept that the vacuum heat insulating material mainly serves as a heat insulating function. Therefore, in the heat insulating box of the present invention, the heat insulating property of the hard urethane foam produced by the increase of the bending elastic modulus of the hard urethane foam (in other words, the rigidity of the hard urethane foam) The effect of the reduction is small. Therefore, in the heat insulating box of the present invention, the flexural modulus of elasticity of the hard urethane foam can be made larger than 15.0 MPa or more of the hard urethane foam used in the conventional heat insulating box. Therefore, the heat insulation box system of the present invention can also prevent the strength reduction caused by the decrease in the filling rate of the vacuum heat insulating material.

Therefore, the present invention provides a heat insulating box that can expand the internal volume of the heat insulating box while ensuring heat insulating performance, and a refrigerator and a drinking water storage device including the heat insulating box.

1‧‧‧Insulation box

2‧‧‧Outer box

3‧‧‧ inner box

4‧‧‧ Space

5‧‧‧hard urethane foam

6‧‧‧vacuum insulation

7‧‧‧Storage room

8‧‧‧ spacers

9‧‧‧Condensing piping

10‧‧‧

10a‧‧‧ Space

11‧‧‧shims

12‧‧‧ Face material

13‧‧‧ inner board

14‧‧‧ Hinges

15‧‧‧Front flange face

16‧‧‧ Track

21‧‧‧Refrigerator

22‧‧‧Freezer

23‧‧‧ vegetable room

24‧‧ ‧ partition,

25‧‧‧Cooling room

26‧‧‧Fan Grid Plate

27‧‧‧ cooler

28‧‧‧cooler fan

29‧‧‧Machine room

30‧‧‧Compressor

31‧‧‧Control circuit board room

32‧‧‧Injection

33‧‧‧ gap

34‧‧‧ sheet metal cover

100‧‧‧ refrigerator

Fig. 1 is a front sectional view showing a heat insulating box body according to a first embodiment of the present invention.

Fig. 2 is a rear elevational view of the heat insulating box body according to the first embodiment of the present invention.

Fig. 3 is a perspective view of a heat insulating box body according to a first embodiment of the present invention.

Fig. 4 is an explanatory view (perspective view) for explaining the process of the heat insulating box according to the first embodiment of the present invention.

Fig. 5 is a perspective view showing another example of the heat insulating box according to the first embodiment of the present invention.

Fig. 6 is a perspective view showing another example of the heat insulating box according to the first embodiment of the present invention.

Fig. 7 is a front sectional view showing a heat insulating box body according to a second embodiment of the present invention.

Fig. 8 is a front sectional view showing a heat insulating box body according to a third embodiment of the present invention.

Figure 9 is a side cross-sectional view showing a heat insulating box body according to a fourth embodiment of the present invention.

Fig. 10 is a side cross-sectional view showing another example of the heat insulating box according to the fourth embodiment of the present invention.

Fig. 11 is a perspective view showing an example in which the door of the heat insulating box according to the fourth embodiment of the present invention is opened.

Figure 12 is a side cross-sectional view showing a refrigerator according to a seventh embodiment of the present invention.

Fig. 13 is a graph showing the relationship between the density of the urethane and the flexural modulus of the first embodiment of the present invention.

Fig. 14 is a graph showing the calculation results of the area percentage of the vacuum heat insulating material and the deformation amount of the casing in the first embodiment of the present invention.

Fig. 15 is a graph showing the calculation results of the area percentage of the vacuum heat insulating material on the side and the back surface of the fifth embodiment of the present invention and the deformation amount of the casing.

Hereinafter, an embodiment of the heat insulating box of the present invention and a refrigerator including the heat insulating box will be described with reference to the drawings.

First embodiment

Fig. 1 is a front sectional view showing a heat insulating box body according to a first embodiment of the present invention. Figure 2 is a rear view of the insulated enclosure. Moreover, Fig. 3 is a perspective view of the heat insulating box. Further, the vacuum heat insulating material 6 is actually disposed in a space 4 (corresponding to the first space of the present invention) formed between the outer casing 2 and the inner casing 3 as will be described later. However, in the second drawing, in order to facilitate understanding of the shape of the vacuum heat insulating material 6 disposed on the back side of the heat insulating box 1, the back surface of the outer case 2 is transmitted. The manner of the vacuum heat insulating material 6 (i.e., the vacuum heat insulating material 6 is indicated by a solid line). Further, in Fig. 3, the illustration of the track 16 is omitted.

Hereinafter, the heat insulating box 1 of the first embodiment will be described using these drawings.

The heat insulating box 1 includes, for example, a case 2 made of metal, and an inner case 3 made of, for example, a resin. Further, a space 4 formed between the outer box 2 and the inner box 3, that is, a top surface, a left and right side surface, a back surface, and a bottom surface portion of the heat insulating box 1 is provided (filled) with a hard urethane foam 5 and a vacuum. Insulation material 6.

In the heat insulating box 1 of the first embodiment, a heat insulating box used in a refrigerator is assumed. Therefore, the heat insulating box 1 of the first embodiment has a bottomed rectangular tube shape (a substantially rectangular parallelepiped shape) in which the top surface and the back surface are closed, and the front surface portion has an open shape. Further, the internal space of the heat insulating box 1 is divided into three storage chambers 7 by, for example, two partition plates 24. Further, in Fig. 3, in order to distinguish these storage chambers, they are indicated by 7, 7', 7". In these partitions 24, a sheet metal cover 34 (for example, a thickness of 1 mm or more) is attached to the front side by screws or the like. The gold plate cover 34 is locked to the heat insulating box 1 by screws or the like, and the partition plate 24 is attached to the heat insulating box 1. In this manner, the partition plate 24 is attached to the partition plate by using the sheet metal cover 34. The heat box 1 can improve the strength of the heat insulating box 1. Further, in the heat insulating box 1 of the first embodiment, the inside of the heat insulating box 1 (that is, the inner box 3) is formed to support the setting. The track 16 of the rack in the storage compartment 7.

The heat insulating box 1 having such a configuration is manufactured, for example, as follows. First, the vacuum heat insulating material 6 is adhered and fixed to the outer casing 2 in advance. Next, the outer case 2 and the inner case 3 are fixed, for example, by adhesion. Then, as shown in Fig. 4, in the state in which the back surface of the heat insulating box 1 faces upward, the liquid is injected from the injection port 32 formed on the back side. The raw material of the urethane foam 5 of the state is integrally foamed, whereby the space 4 is filled with the hard urethane foam 5.

Therefore, the vacuum heat insulating material 6 cannot be disposed at a position facing the injection port 32 on the back side of the heat insulating box 1. Therefore, in the first embodiment, the vacuum heat insulating material 6 is disposed on the back side of the heat insulating box 1 as shown in Fig. 2 . In other words, the vacuum heat insulating material 6 disposed on the back side of the heat insulating box 1 is not a single body but is divided into a plurality of pieces (for example, two to three). Further, the injection port 32 is formed to face the corner portions of the vacuum heat insulating materials 6. By forming the notch 33 at a corner portion opposed to the injection port 32, the area of the vacuum heat insulating material 6 is increased, and the vacuum heat insulating material 6 can be disposed to flash the injection port 32 (that is, the hard amine can be injected) a stock solution of ethyl formate foam 5). By providing the vacuum heat insulating material 6 in such a configuration, it is possible to provide the heat insulating box 1 which is more excellent in heat insulating performance.

Further, the position at which the injection port 32 is formed is completely an example, and can be appropriately formed in accordance with the shape of the heat insulating box 1, that is, the shape of the space 4 formed between the outer box 2 and the inner box 3. Therefore, the position at which the injection port 32 is formed can be formed on any one of the side surfaces (the left side surface, the right side surface, the front surface, the back surface, the top surface, the bottom surface, and the like) in accordance with the shape of the heat insulating box 1.

Here, the heat insulating box 1 according to the first embodiment is completely different from the conventional technical concept that is mainly used for the heat insulating function of the hard urethane foam in the heat insulating box. The vacuum insulation material 6 is mainly used as a heat insulating function. Therefore, in the heat insulating box 1 of the first embodiment, the filling rate of the vacuum heat insulating material 6 in the space 4 is 40% or more. In this way, by making the vacuum insulation material 6 in the space 4 Since the filling rate is increased more than ever, the heat insulating performance is improved more than in the past. Therefore, even if the thickness of the heat insulating box 1 is made thinner than in the related art, the heat insulating performance can be ensured to be equal to or higher than the conventional one. Further, Fig. 14 shows the amount of deformation of the vacuum heat insulating material 6 in the space 4 and the amount of deformation when the load is applied to the heat insulating box 1. Since the vacuum heat insulating material 6 has a larger bending elastic modulus than the hard amine urethane foam 5, the amount of deformation of the heat insulating box 1 can be made small by increasing the percentage of the vacuum heat insulating material 6, in other words, The strength of the heat insulating box 1 is greatly improved. At this time, it is also effective to increase the thickness, but the wall thickness of the heat insulating box 1 is easily thinned by making the area large. Therefore, the heat insulating box 1 of the first embodiment has the vacuum heat insulating material 6 at least in the side surface portion and the back surface portion of the outer box 2, and the filling rate of the vacuum heat insulating material 6 in the space 4 is 40% or more. The area percentage of the surface area of the vacuum heat insulating material 6 relative to the outer box 2 is set to 60% or more, whereby the bending elastic modulus is higher than that of the hard amine foam used in the conventional heat insulating box. The vacuum heat insulating material 6 mainly serves as a wall surface strength of the heat insulating box 1. Therefore, in the heat insulating box 1 of the first embodiment, the thickness of the heat insulating box 1 can be reduced. Therefore, the storage chamber 7 can be enlarged without changing the outer shape, and the heat insulating box 1 can be used. The internal storable storage is increased. Further, when the strength of the wall surface is lowered, the heat insulating box 1 is deformed, and for example, the frame having the inside is dropped, or the sliding property of the pull-out box or the door is deteriorated.

In the heat insulating box 1 of the first embodiment, the filling rate of the vacuum heat insulating material 6 in the space 4 is set to 80% or more. According to the technical idea of the first embodiment as described above, it is preferable to completely fill the vacuum heat insulating material 6 in the space 4. However, as shown in Fig. 1, the rail 16 formed in the inner box 3 protrudes into the space 4. Also, in the heat insulation box 1 For example, in the case of a refrigerator, a lead wire that connects a compressor or a control panel (controlling the number of revolutions of the compressor, etc.) mounted on the heat insulating box 1 is also disposed in the space 4. Moreover, in the case where the heat insulating box 1 is used for, for example, a refrigerator, a refrigerant pipe or the like is also disposed in the space 4. Therefore, if the space 4 is completely filled with the vacuum heat insulating material 6, the shape of the vacuum heat insulating material 6 becomes complicated, and formation of the vacuum heat insulating material 6 becomes difficult. Further, in order to suppress deformation due to a decrease in strength of the heat insulating box 1, it is necessary to adhere the outer box 2 to the inner box 3, but a rail for supporting the rack provided in the storage chamber 7 is often installed in the inner box 3. 16 or other parts, therefore, even if the vacuum heat insulating material 6 is adhered to the outer case 2, it is difficult to adhere the vacuum heat insulating material 6 to the inner case 3. However, by filling and filling the hard urethane foam 5, even if the rail 16 or other parts are present in the space 4, the outer box 2 and the inner box 3 can be adhered without any problem. At this time, if a range (ie, a void) in which the hard urethane foam 5 is not filled in the heat insulating box 1 occurs, the heat insulating performance of the heat insulating box 1 is lowered. Therefore, in the heat insulating box 1 of the first embodiment, the filling rate of the vacuum heat insulating material 6 in the space 4 is secured in order to secure a certain gap (for example, about 6 mm) required for filling the hard urethane foam. Set to 80% or less.

However, since the filling rate of the vacuum heat insulating material 6 in the space 4 is increased, the filling rate of the hard urethane foam 5 in the space 4 is lowered. Therefore, the adhesion between the outer casing 2 and the inner casing 3 is insufficient, and as a result, it is considered that the strength of the heat insulating casing 1 is lowered. However, as described above, the heat insulating box 1 of the first embodiment has been developed based on the technical concept that the vacuum heat insulating material 6 mainly serves as a heat insulating function. Therefore, the influence of the decrease in the heat insulating property of the hard amine urethane foam 5 due to the increase in the bending elastic modulus of the hard urethane foam 5 (in other words, the rigidity of the hard amine formate foam) is small. Therefore, in the heat insulating box 1 of the first embodiment, the density of the hard urethane foam 5 is higher than that of the prior art (for example, 60 kg/m ³ or more), and as shown in Fig. 13, the hard amine carboxylic acid can be used. The flexural modulus of elasticity of the ethyl ester foam 5 becomes 15.0 MPa or more larger than that of the hard urethane foam used in the conventional heat insulating box. Therefore, the heat insulating box 1 of the first embodiment can prevent the strength reduction caused by the decrease in the filling rate of the urethane foam 5, and the heat insulating box 1 cannot withstand the weight of the contents. The problem of deformation caused by strain. That is, even if the vacuum heat insulating material 6 is used in a large amount, there is no problem in the quality of the heat insulating box 1, and energy saving can be achieved by the excellent heat insulating performance.

Further, the density of the hard urethane foam 5 is such that the amount of the stock solution of the hard urethane foam 5 in the injection space 4 is larger than ever, and the density value can be increased.

Moreover, in the first embodiment, the upper limit of the bending elastic modulus of the hard urethane foam 5 is 150.0 MPa or less. This is because if the flexural modulus of the hard urethane foam 5 is more than 150.0 MPa, the density of the hard urethane foam 5 becomes too large to be solidified into a sponge, and the hard urethane foam 5 is thermally insulated. The performance is rapidly reduced.

In addition, the vacuum heat insulating material 6 used in the heat insulating box 1 of the first embodiment is known. However, in the first embodiment, for example, the vacuum heat insulating material 6 shown below is used. In other words, the heat insulating box 1 of the first embodiment is intended to be used in a refrigerator having the specifications shown below.

(1) The total thickness of the outer box 2 and the inner box 3 is 2 mm, and the average wall thickness of the heat insulating box 1 is 30 mm, that is, the average distance in the wall thickness direction of the space 4 is 28mm insulation box 1.

(2) Further, the thickness of the vacuum heat insulating material 6 is 20 mm, and the average flow path in the wall thickness direction of the space 4 is 8 mm.

(3) The thermal conductivity of the hard amine ethyl ester foam 5 is 0.018 W/mK to 0.025 W/mK.

(4) The internal volume is 500L, and the power consumption is 40W or less.

In the case of such a condition, if the thermal conductivity of the vacuum heat insulating material 6 exceeds 0.0030 W/mK, the influence of the wall thickness reduction on the heat insulating performance becomes large, and the heat insulating performance becomes worse than the specification (ie, Power consumption is greater than 40W). Therefore, in the first embodiment, the thermal conductivity of the vacuum heat insulating material 6 is set to 0.0030 W/mK or less, thereby preventing the influence of the thickness reduction on the heat insulating performance. In addition, when the thermal conductivity of the vacuum heat insulating material 6 is lowered, the cost per 0.001 W/mK is increased, and since it is 0.0012 W/mK, sufficient insulation performance can be ensured. The thermal material 6 system uses a thermal conductivity of 0.0030 to 0.0012 W/mK. Further, in the first table, the thickness of the wall surface and the filling rate of the vacuum heat insulating material, the bending elastic modulus of the hard urethane foam, and the deformation amount of the casing are described in the first embodiment of the present invention. When comparing the items 1 and 4 of the first table, for example, when the wall thickness is changed from the conventional 40 mm to 30 mm, the filling ratio of the vacuum heat insulating material 6 is 40% or more, and the urethane is used. When the bending elastic modulus is 15 MPa or more, the heat insulating box 1 can secure the strength of the casing equal to or higher than that of the conventional product.

Further, in the heat insulating box 1 of the first embodiment, it is preferable to use a vacuum heat insulating material using an aluminum vapor deposited film as the exterior film as the vacuum heat insulating material 6 for the following reasons. In the heat insulating box 1 of the first embodiment in which the vacuum heat insulating material 6 is mainly used as the main heat insulating material, a so-called heat bridge is generated more than ever (a film is attached via a vacuum heat insulating material, heat is removed from the vacuum). The surface of the insulating material is conducted to the back). Therefore, in the heat insulating box 1 of the first embodiment, it is more difficult to use the aluminum vapor-deposited film as the vacuum heat insulating material 6 than the vacuum heat insulating material using the aluminum foil film in the exterior film. A vacuum insulation material is preferred.

In addition, as a method of measuring the bending elastic modulus and the density in the first embodiment, the center position of each of the left and right side surfaces, the back surface, the top surface, and the bottom surface is cut to a size of 100 × 100 × 5 mm or more. The hard urethane foam 5 is calculated by the average, and the refrigerant is not cut out of the hard urethane foam 5 at the center, and the position is closest to the center. The position of the hard urethane foam 5 having a size of 100 × 100 × 5 mm or more was cut out.

As described above, in the heat insulating box 1 of the first embodiment, since the thickness of the heat insulating box 1 can be made thinner than in the related art, it is possible to provide the heat insulating box 1 which is more energy-saving and has better internal volume efficiency than conventional ones. In other words, the storage compartment 7 can be enlarged more than in the past without changing the outer dimensions, and the storage items that can be stored inside the heat insulating box 1 can be added more than ever.

Further, the shape of the heat insulating box 1 shown in the first embodiment The shape is completely an example. For example, as shown in Fig. 5, the internal space of the heat insulating box 1 can be divided by three partitions 24 to form four storage chambers 7. Further, for example, as shown in Fig. 6, the internal space of the heat insulating box 1 can be divided by four partition plates 24 to form five storage chambers 7. By increasing the partition 24 or the sheet metal cover 34, the strength of the heat insulating box 1 can be further improved. That is, the more the number of the storage chambers 7 is, the effect of increasing the strength of the casing by the sheet metal cover 34 is obtained, even if the average thickness of the portion of the hard urethane foam 5 covered with the vacuum heat insulating material 6 is thinned (for example, 5 mm). The following) also ensures sufficient box strength. Therefore, it is possible to further enlarge the storage compartment 7 without changing the outer dimensions of the heat insulating box 1, and it is possible to further increase the contents that can be stored inside the heat insulating box 1.

Further, in the first embodiment, the internal structure of the partition plate 24 is not particularly described, but it is of course possible to adopt the same configuration as that of the heat insulating box 1. In other words, the hard urethane foam 5 and the vacuum heat insulating material 6 may be filled in the internal space of the separator 24, and the filling rate of the vacuum heat insulating material 6 at that time may be set to 40% to 80%, which is hard. The flexural modulus of the urethane foam 5 is set to 15.0 MPa or more. By forming the partition plate 24 in this manner, the heat insulating performance of the heat insulating box 1 can be further improved.

Second embodiment

In the first embodiment, the vacuum heat insulating material 6 is placed on the outer casing 2, and the vacuum heat insulating material 6 is placed in the space 4 formed between the outer casing 2 and the inner casing 3. Not limited to this, for example, the vacuum heat insulating material 6 may be disposed in the space 4 as shown below. The items that are not specifically described in the second embodiment are the same as in the first embodiment, and the same functions and configurations are denoted by the same reference numerals.

Fig. 7 is a front sectional view showing a heat insulating box body according to a second embodiment of the present invention.

As shown in Fig. 7, in the heat insulating box 1 of the second embodiment, the condensation pipe 9 is provided on the inner surface side of the outer case 2. The condensing pipe 9 is a refrigerant pipe through which the high-temperature high-pressure refrigerant discharged from the compressor flows, and the refrigerant flowing through the pipe is cooled (condensed) by the outside air via the pipe wall of the condensing pipe 9 and the outer casing 2. In the heat insulating box 1 of the second embodiment, the partition wall 8 having a thickness equal to or larger than the diameter of the condensing pipe 9 is attached to the inner wall of the outer casing 2 at a position that does not overlap the condensing pipe 9. Further, a vacuum heat insulating material 6 is attached to the spacer 8. In other words, in the heat insulating box 1 of the second embodiment, the vacuum heat insulating material 6 is disposed from the outer box 2 and the inner box 3 via a predetermined interval, and the vacuum heat insulating material 6 is embedded in the hard urethane foam 5 . .

In the heat insulating box 1 configured as described in the second embodiment, the vacuum heat insulating material 6 is embedded in the hard urethane foam 5 in this manner, even if the condensing pipe 9 is present in the outer casing 2 In the case of the case, vacuum insulation material 6 can also be provided.

Further, the vacuum heat insulating material 6 has a feature that the higher the temperature, the more easily the gas is absorbed, and the internal vacuum is lowered, and the thermal conductivity is deteriorated, but the vacuum heat insulating material 6 is kept away from the high temperature, and the tank 2 or the condensing piping is removed. 9. Since the temperature of the vacuum heat insulating material 6 can be lowered to suppress deterioration, it is possible to provide the heat insulating box 1 having high long-term reliability.

Further, the vacuum heat insulating material 6 has a feature that the degree of vacuum inside is lowered by the absorption of the surrounding gas, and the thermal conductivity is deteriorated. However, the vacuum heat insulating material 6 is embedded in the hard urethane foam 5 because it can be reduced. Vacuum insulation Since the amount of the gas around the material 6 is present, deterioration of the vacuum heat insulating material 6 can be suppressed, and the heat insulating box 1 having high long-term reliability can be provided. In particular, the heat insulating box 1 of the second embodiment has a higher density of the hard urethane foam 5 than the hard urethane foam used in the conventional heat insulating box. Therefore, since the amount of the gas around the vacuum heat insulating material 6 can be further reduced, deterioration of the vacuum heat insulating material 6 can be further suppressed, and the heat insulating box 1 having high long-term reliability can be provided.

In the second embodiment, the heat insulating box 1 in which the condensation pipe 9 is disposed in the space 4 has been described. However, the heat insulating box 1 in which the condensation pipe 9 is not provided in the space 4 may of course be used. The vacuum heat insulating material 6 is embedded in the hard urethane foam 5. Since the amount of the gas around the vacuum heat insulating material 6 can be reduced, deterioration of the vacuum heat insulating material 6 can be suppressed, and the heat insulating box 1 having high long-term reliability can be provided.

Third embodiment

The shape of the inner case 3 or the like is not limited to the configuration described in the first embodiment or the second embodiment. For example, the vacuum heat insulating material 6 may be disposed in the space 4 as follows. The items that are not specifically described in the third embodiment are the same as in the first embodiment or the second embodiment, and the same functions and configurations are denoted by the same reference numerals.

Fig. 8 is a front sectional view showing a heat insulating box according to a third embodiment of the present invention.

As shown in Fig. 8, the heat insulating box 1 of the third embodiment has a configuration in which the rails 16 are not formed in the inner box 3 (see Figs. 1 and 7). In this manner, in the case where the inner case 3 is easily adhered to the vacuum heat insulating material 6, all or a part of the vacuum heat insulating material 6 may be disposed in the inner case 3.

As described above, in the heat insulating box 1 configured as described in the third embodiment, the heat insulating box 1 which is more energy-saving and more excellent in the internal volume efficiency than the conventional one can be provided with a smaller amount of the vacuum heat insulating material 6. In other words, the vacuum heat insulating material 6 having the same size as that of the third embodiment is adhered to, for example, the outer casing 2. In this case, since the surface area of the outer case 2 is larger than the surface area of the inner case 3, for example, at the corners or the like, the gap formed between the vacuum heat insulating materials 6 becomes smaller than that of the vacuum heat insulating material 6 The case of the inner box 3 is large. In other words, by disposing the vacuum heat insulating material 6 in the inner box 3, the loss is reduced between the vacuum heat insulating materials 6 as compared with the case where the vacuum heat insulating material 6 of the same size is disposed in the outer box 2. The amount of gap formed is not present, and a more efficient heat insulating box 1 can be provided.

Fourth embodiment

In the case where the heat insulating box 1 shown in the first embodiment to the third embodiment has a door, it may be configured as follows, for example. The items that are not specifically described in the fourth embodiment are the same as in the first embodiment to the third embodiment, and the same functions and configurations are denoted by the same reference numerals.

Figure 9 is a side cross-sectional view showing a heat insulating box body according to a fourth embodiment of the present invention.

As shown in Fig. 9, the heat insulating box 1 of the fourth embodiment has a door 10 for opening and closing the opening of each of the storage chambers 7 formed therein. The door 10 has, for example, a face material 12 made of metal (corresponding to an outer sheet of the present invention) and an inner panel 13 made of, for example, a resin. Further, in the space 10a (corresponding to the second space of the present invention) formed between the face material 12 and the inner panel 13, the hard urethane foam 5 and the vacuum heat insulating material 6 are disposed (filled). The door 10 is also based on the technical concept described in the first embodiment to the third embodiment (mainly by the vacuum heat insulating material 6) In the technical concept of the heat insulating function, the filling rate of the vacuum heat insulating material 6 in the space 10a is set to 40% to 80%.

When the door 10 is manufactured, the vacuum heat insulating material 6 is adhered and fixed to the face material 12 in advance, and the raw material of the liquid hard urethane foam 5 is injected and integrally foamed, whereby the hard amine carboxylic acid is used. The ethyl ester foam 5 is filled in the space 10a.

Further, the configuration of the door 10 shown in Fig. 9 is an entirely example. For example, there is a case where a frame for supporting the storage object accommodated in the storage compartment 7 or the like is attached to the storage compartment 7 side (the inner panel 13 side) of the door 10. In this case, in order to lock the frame to the door 10 with screws (in order to form the nut portion on the door 10), as shown in Fig. 9, the hard urethane foam 5 is disposed in the storage room of the space 10a. The 7 side (the inner panel 13 side) is preferred. However, in particular, in the case of a component that is not attached to the storage compartment 7 side (the inner panel 13 side) of the door 10, the door 10 may be configured as shown in Fig. 10, for example.

Fig. 10 is a side cross-sectional view showing another example of the heat insulating box according to the fourth embodiment of the present invention.

That is, as shown in FIG. 10, all or a part of the vacuum heat insulating material 6 may be disposed on the inner panel 13. At this time, in a range in which the vacuum heat insulating material 6 that is not manufactured by the upper and lower sides of the door 10 is covered (refer to the portion A in FIG. 9), compared with the case where the vacuum heat insulating material 6 is disposed on the face material 12 In the case of using the vacuum heat insulating material 6 of the same size, the heat insulating material 1 of the same size is reduced, and the heat insulating box 1 is more efficient.

Moreover, it is not necessary to arrange the vacuum heat insulating material 6 in all the doors 10. For example, in the case where the temperature difference between the outside air and the heat insulating box 1 (that is, the storage chamber 7) is small, When the vacuum heat insulating material 6 is disposed in the door 10, the effect of improving the heat insulating performance is also small. In this case, the vacuum insulation material 6 is not disposed in the door 10, and sufficient heat insulation performance can be ensured.

Further, the door 10 of the fourth embodiment is not particularly limited to the mounting structure of the main body portion of the heat insulating box 1 (the casing portion formed by the outer box 2 and the inner box 3). For example, the door 10 may be attached to the body portion of the heat insulating box 1 by using a pull-out mounting structure of the rail. Further, for example, as shown in Fig. 11, the door 10 may be attached to the main body portion of the heat insulating box 1 by a rotary mounting structure.

Fig. 11 is a perspective view showing a door opening of an example of a mounting structure of a door of the heat insulating box according to the fourth embodiment of the present invention.

When the door 10 is attached to the main body of the heat insulating box 1 by a rotary mounting, the hinge 14 is fixed to one side of the left and right sides of the body portion of the heat insulating box 1. Further, by inserting the shaft of the hinge 14 into the door 10, the door 10 can be rotated about the hinge 14 and opened and closed.

Further, in the above-described door 10, as shown in Fig. 11, it is preferable to attach the spacer 11 to the storage compartment 7 side of the door 10. The spacer 11 is made of, for example, vinyl chloride. When the door 10 is closed, the gasket 11 is brought into close contact with the front flange surface 15 of the main body portion of the heat insulating box 1, so that the air in the storage chamber 7 can be prevented from flowing out of the casing.

In the heat insulating box 1 configured as described in the fourth embodiment, the vacuum heat insulating material is the sum of the space 4 formed between the outer box 2 and the inner box 3 and the space 10a which is the inner space of the door 10. The filling rate is 40% to 80%. Therefore, since the wall thickness of the heat insulating box 1 (that is, the distance between the outer box 2 and the inner box 3 and the thickness of the door 10) can be made thinner than in the past, energy saving can be provided and the content efficiency is superior to the past. Insulation box 1. Therefore, it is not necessary to change the external dimensions. The storage room 7 can be enlarged more than in the past, and the storage items that can be stored inside the heat insulating box 1 can be added more than ever. Therefore, it is possible to provide the heat insulating box 1 having a higher commercial value than in the past.

Further, since the filling rate of the vacuum heat insulating material 6 in the space 4 is increased, the filling rate of the hard urethane foam 5 in the space 4 is lowered. However, in the heat insulating box 1 of the fourth embodiment, the density of the hard urethane foam 5 is higher than that of the prior art (for example, 60 kg/m ³ or more), and the flexural elasticity of the hard urethane foam 5 can be made. The coefficient becomes 15.0 MPa or more larger than the hard urethane foam used in the conventional heat insulating box. Therefore, in the heat insulating box 1 of the fourth embodiment, the strength reduction caused by the decrease in the filling rate of the hard urethane foam 5 can be prevented, and the heat insulating box 1 cannot withstand the weight of the contents. Problems caused by strain and deformation.

Thereby, it is possible to suppress the inclination of the door 10 due to the deformation of the heat insulating box 1, and it is possible to prevent the appearance from being deteriorated. Further, it is possible to prevent the positional relationship between the spacer 11 and the front side flange surface 15 from being shifted to generate a gap, and the air in the storage chamber 7 flows out of the casing. Therefore, even if the vacuum heat insulating material 6 is used in a large amount, there is no problem in the quality of the heat insulating box 1, and energy saving can be achieved by excellent heat insulating performance.

Fifth embodiment

In the heat insulating box 1 according to the first to fourth embodiments, the deformation of the heat insulating box 1 caused by the decrease in strength is the influence ratio of the strength of the vertical side surface portion or the back surface portion in terms of gravity. The horizontal bottom or ceiling is larger. Therefore, as shown below, by mounting the vacuum heat insulating material 6, the strength of the heat insulating box 1 can be further improved. In addition, the items which are not specifically described in the fifth embodiment are the same as in the first embodiment to the fourth embodiment. The function or composition is explained using the same symbols.

In the heat insulating box 1 shown in Fig. 1, the area percentage of the area of the vacuum insulating material 6 for each surface and the amount of deformation of the box are calculated in the side surface portion or the back surface portion, and the result is shown in Fig. 15. Further, the filling rate of the vacuum heat insulating material 6 was set to 40%, and the amount of deformation when the area percentage was 50% was set to 1. Since the bending elastic modulus of the vacuum heat insulating material 6 is 20 MPa to 40 MPa, which is larger than the bending elastic modulus of the hard urethane foam 5, the larger the area of the vacuum heat insulating material 6 in the side portion and the back portion, the heat insulation. The smaller the amount of deformation of the casing 1, the greater the strength of the heat insulating box 1.

Further, according to Fig. 15, when the area percentage of the vacuum heat insulating material 6 exceeds 70%, the influence on the strength of the heat insulating box 1 becomes small. This is because the filling rate is calculated as 40%, which is proportional to the amount by which the area is enlarged, and the influence of the thickness of the vacuum heat insulating material 6 is made thin. If the area of the vacuum heat insulating material 6 is enlarged and the filling rate is increased when the thickness is fixed, this does not occur naturally. However, since the filling rate of the vacuum heat insulating material 6 is increased, the cost is increased. The strength of the heat insulating box 1 is increased without changing the filling rate. As shown above, the efficiency is improved as long as the area percentage is increased. If it is set to 70% or more, it is expected to ensure the strength, and the heat insulating box 1 can be used. The wall thickness becomes thinner, and the volume of the storage chamber 7 can be enlarged.

In the heat insulating box 1 of the fifth embodiment, the thickness of the heat insulating box 1 can be made thinner than in the related art. Therefore, it is possible to provide the heat insulating box 1 which is more energy-saving and has better internal volume efficiency than conventional ones. In other words, the storage compartment 7 can be enlarged more than in the past without changing the outer dimensions, and the storage items that can be stored inside the heat insulating box 1 can be added more than ever.

Sixth embodiment

In the heat insulating box 1 of the first embodiment to the fifth embodiment, by increasing the pre-expansion density of the hard urethane foam 5, it is possible to provide a heat-insulating box which is more stable in strength, excellent in appearance, and high in quality. Body 1. The items that are not specifically described in the sixth embodiment are the same as in the first embodiment to the fifth embodiment, and the same functions and configurations are denoted by the same reference numerals.

By increasing the density of the hard amine urethane foam 5, the bending elastic modulus is increased, and the strength of the heat insulating box 1 is increased, as shown above, but it is intended to directly increase the amount of the urethane stock solution to increase In the case of density, in the conventional urethane having a high expansion ratio, the density of the urethane is likely to be uneven in the vicinity of the injection port 32 and the end portion, and it is difficult to obtain stable strength.

Therefore, by making the pre-expansion density large, it becomes easy to make the density of the hard urethane foam 5 uniform. Here, the pre-expansion density means the density of the urethane which does not foam the urethane in the sealed space, such as a case, and foams the urethane in the open state. Generally, when the urethane is foamed and expanded in a narrow space, the density becomes higher than the pre-expansion density.

For example, the foaming system of the hard urethane foam 5 generally has a lot of internal bubbles. That is, the effect of heat insulation with a small density is high. Therefore, the density of the hard urethane foam 5 generally used in the heat insulating box 1 is often such that the density is about 25 to 30 kg/m ³ . When the urethane foam is used, the bending elastic modulus is 15 MPa or more. When the strength of the heat insulating box 1 is to be secured, for example, the heat insulating box having a thickness of 8 mm of the above urethane is required to be more than appropriate. The amount of packaging (the amount of ethyl urethane when the hardened urethane foam 5 is filled in the object box) is uneven in density. Further, since the urethane is contained more than the proper amount of the package, the urethane is overflowed from the gap between the heat insulating box 1 or the door 10 (for example, the joint between the outer box 2 and the inner box 3), and cannot be It is possible to ensure the density of the desired hard urethane foam, and it is prone to the problem of the need to remove the overflowed urethane.

Here, the pre-expansion density can be increased by reducing the amount of the foaming material contained in the urethane stock solution. For example, in the heat insulating box having a thickness of 8 mm of the above-mentioned urethane, the pre-expansion density is 35 kg/m ³ , and the density of the appropriate packaging amount is 60 kg/m ³ or more, thereby securing the hard amine carboxylic acid. The flexural modulus of elasticity of the ethyl ester foam 5 is 15 MPa, and the unevenness of density or the leakage of urethane is eliminated. Here, there is a concern about the effect of increasing the pre-expansion density of the urethane to the heat insulating property, but as described above, since the filling rate of the vacuum heat insulating material 6 is 40% to 80%, the hard aminecarboxylic acid The deterioration of the heat insulating property of the ethyl ester foam 5 has a small influence on the heat insulating performance of the heat insulating box 1 or the door 10. Further, in the case where the thickness of the urethane is less than 8 mm as described above, the appropriate amount of packaging can be adjusted by setting the pre-expansion density to 35 kg/m ³ or more.

As described above, in the heat insulating box 1 of the sixth embodiment, the thickness of the heat insulating box 1 can be made thinner than in the past, and the strength can be ensured, and the urethane is hard to leak, thereby ensuring stable quality. The heat insulating box 1 is more energy-efficient and has an excellent internal volume efficiency than ever. In other words, the storage compartment 7 can be enlarged more than in the past without changing the outer dimensions, and the storage items that can be stored inside the heat insulating box 1 can be added more than ever.

Seventh embodiment

In the seventh embodiment, the above-described embodiment will be described. An example of a refrigerator of the heat insulating box 1 shown. The items that are not specifically described in the seventh embodiment are the same as in the first embodiment to the sixth embodiment, and the same functions and configurations are denoted by the same reference numerals.

Figure 12 is a side cross-sectional view showing a refrigerator according to a seventh embodiment of the present invention. In addition, Fig. 12 shows a refrigerator 100 using the heat insulating box 1 shown in Fig. 9 of the fourth embodiment.

In the refrigerator 100 of the seventh embodiment, the storage compartment 7 formed inside the heat insulating box 1 is used as the refrigerating compartment 21, the freezing compartment 22, and the vegetable compartment 23 from the upper portion.

Further, in the refrigerator 100 according to the seventh embodiment, the heat insulating box 1 has a cooling device for cooling the air supplied to the refrigerating chamber 21, the freezing chamber 22, and the vegetable compartment 23. This cooling device is composed of a compressor 30, a condensing pipe 9 (see Fig. 7), a pressure reducing device (expansion valve or capillary tube) (not shown), a cooler 27, and the like. That is, the refrigerator 100 of the seventh embodiment has a refrigeration cycle as a cooling device. Among the constituent elements of these cooling devices, the compressor 30 and the pressure reducing device are provided in a machine room 29 formed on the lower side of the rear portion of the heat insulating box 1. The condensation pipe 9 is provided on, for example, a side surface portion of the heat insulation box 1. The cooler 27 is provided in a cooling chamber 25 formed by the inner box 3 and the fan grid plate 26. Further, in the cooling chamber 25, a cooler fan 28 for supplying the air cooled by the cooler 27 to the refrigerating compartment 21, the freezing compartment 22, and the vegetable compartment 23 is also provided. Further, the control circuit board chamber 31 is formed on the upper side of the rear portion of the heat insulating box 1, and a control circuit board for controlling the number of revolutions of the compressor 30 or the cooler fan 28 is disposed in the control circuit board chamber 31.

The refrigerator 100 constructed in this manner is located in the machine room 29 The high-temperature high-pressure gas refrigerant sent from the internal compressor 30 is condensed between the condensation pipes 9 (see Fig. 7). The low-temperature high-pressure liquid refrigerant is depressurized into a low-temperature and low-pressure gas-liquid two-phase refrigerant by a pressure reducing device, and when it flows to the cooler 27, for example, it is -20 ° C or lower. The low-temperature low-pressure gas-liquid two-phase refrigerant cools the air in the cooling chamber 25, and the cooled air is supplied to the refrigerating chamber 21, the freezing chamber 22, and the vegetable compartment 23 by the cooler fan 28, thereby cooling the refrigerating chamber 21 and freezing Room 22 and vegetable compartment 23 (described in more detail, the contents contained in these storage compartments). On the other hand, the low-temperature and low-pressure gas-liquid two-phase refrigerant after cooling the air in the cooling chamber 25 is heated by the air in the cooling chamber 25 to evaporate, and becomes a low-pressure gas-like refrigerant, which is sucked and compressed by the compressor 30.

As described above, in the refrigerator 100 configured as described in the seventh embodiment, the vacuum insulation material is filled in the sum of the space 4 formed between the outer box 2 and the inner box 3 and the space 10a which is the inner space of the door 10. The rate is 40% to 80%. Therefore, even if the thickness of the heat insulating box 1 (that is, the distance between the outer box 2 and the inner box 3 and the thickness of the door 10) is made thinner than in the related art, the heat insulating performance can be ensured. Therefore, since it is difficult to warm each storage compartment, the amount of air required for cooling can be suppressed, and the number of revolutions of the compressor 30 can be reduced or the time of non-operation can be prolonged. Therefore, the refrigerator 100 can be made energy-saving. Further, in the refrigerator 100 having the configuration shown in the seventh embodiment, it is possible to enlarge the storage compartments more than in the past without changing the outer dimensions, and it is possible to increase the storage contents that can be stored in the respective storage compartments than in the related art.

Further, by arranging the freezing compartment 22 having the largest temperature difference with the outside air at the center, it is possible to form four surfaces (the front door 10, the left and right side surfaces, and the back surface) from the surface where the outside air enters the freezing compartment 22. Therefore, the refrigerator 100 can be made more energy efficient.

Moreover, in the seventh embodiment, it is also filled in the space 4 Since the flexural modulus of the hard urethane foam 5 of the space 10a is 15 MPa or more, the strength of the heat insulating box 1 is ensured, and the strain caused by the heat insulating box 1 being unable to withstand the weight of the stored object can be suppressed. Deformation. Therefore, it is possible to suppress the inclination of the door 10 due to the deformation of the heat insulating box 1, and it is possible to prevent the appearance from being deteriorated. Further, since the gap between the spacer 11 and the front flange surface 15 can be prevented from being shifted, and the air in the refrigerator compartment 21, the freezer compartment 22, and the vegetable compartment 23 flows out of the heat insulating box 1, it is possible to The refrigerator 100 is more energy efficient.

Further, in the seventh embodiment, the distribution of the filling rate of the vacuum heat insulating material 6 in the space 4 and the refrigerator 100 is not particularly described, but the space 4 and the space 10a may be used depending on the temperature difference between the outside air and each storage room. The filling rate of the vacuum heat insulating material 6 is changed for each predetermined position.

For example, the freezer compartment 22 has the largest temperature difference between the internal temperature and the outside air. Therefore, the filling rate of the vacuum heat insulating material 6 on the left and right side surfaces, the back surface, and the front surface (the door 10) of the heat insulating box 1 in the range facing the freezing chamber 22 can be made larger than the filling rate in other ranges ( For example, 60% or more). According to this configuration, it is possible to suppress the intrusion of heat to the freezing compartment 22 having the lowest temperature, and it is possible to make the refrigerator 100 more energy-saving.

Further, for example, when the outside air temperature is, for example, 30 ° C, the machine room 29 is, for example, 35 ° C or higher, and the control circuit board chamber 31 is, for example, raised to 40 ° C or higher. That is, the temperature difference between the machine room 29 and the control circuit board chamber 31 and the storage compartment is larger than that of the other parts. Therefore, heat is easily intruded into the storage compartment disposed in the vicinity of the machine room 29 and the control circuit board compartment 31. Therefore, the filling rate of the vacuum heat insulating material 6 which is the position between the machine room 29 and the control circuit board chamber 31 and the storage chamber can be made larger than the filling rate of other ranges (for example, 60% or more). By this side According to the configuration, it is possible to suppress the intrusion of heat from the mechanical chamber 29 or the control circuit board chamber 31 having a high temperature to the storage chamber 7 in the vicinity, and the refrigerator 100 can be made more energy-saving.

Further, in the seventh embodiment, the refrigerator 100 in which the three storage rooms (the refrigerator compartment 21, the freezing compartment 22, and the vegetable compartment 23) are formed will be described. However, it is of course possible to heat the heat as shown in Fig. 5 or Fig. 6, for example. The cabinet 1 is divided into four, and the number of storage compartments of the refrigerator 100 is set to four or more. By configuring the refrigerator 100 in this manner, the same effects as described above can be obtained.

[Industrial Applicability]

The heat insulating box 1 of the present invention can be used, for example, as a drinking water storage device having a heating device for heating water and a water tank for storing water heated by the heating device. By arranging the water tank inside the heat insulating box 1, the heat insulating box 1 having a smaller outer shape can be insulated from the water tank, and the drinking water storage device can be made smaller.

1‧‧‧Insulation box

6‧‧‧vacuum insulation

2‧‧‧Outer box

3‧‧‧ inner box

4‧‧‧ Space

5‧‧‧hard urethane foam

7, 7', 7" ‧ ‧ storage room

16‧‧‧ Track

24‧‧ ‧ partition

Claims (10)

An insulated box body comprising: an outer box and an inner box; and a vacuum heat insulating material and a hard urethane foam filled in a first space formed between the outer box and the inner box; The vacuum heat insulating material is mounted on at least the left and right side surface portions and the back surface portion, and the filling rate of the vacuum heat insulating material in the first space is 40% to 80%, and the area percentage of the vacuum heat insulating material of the outer box surface area is 60%. The flexural modulus of elasticity of the hard urethane foam is 15.0 MPa or more. The heat insulating box of claim 1, wherein the door has a door, and the door comprises: an outer plate and an inner plate; and a vacuum heat insulating material and a hard amine foam, which are filled on the outer plate and The second space formed between the inner plates; and the filling ratio of the vacuum heat insulating material is 40% to 80% in the total of the first space and the second space. For example, in the heat insulating box of claim 1, wherein the average thermal conductivity of the hard amine urethane foam is 0.018 W/mK to 0.025 W/mK; the thermal conductivity of the vacuum heat insulating material is 0.0030 W/mK~ 0.0012W/mK. For example, in the heat insulating box of claim 2, wherein the average thermal conductivity of the hard amine urethane foam is 0.018 W/mK to 0.025 W/mK; the thermal conductivity of the vacuum heat insulating material is 0.0030 W/mK~ 0.0012W/mK. The heat insulating box of claim 1, wherein the vacuum heat insulating material is disposed from the outer box and the inner box via a predetermined interval; The vacuum insulation material is embedded in the hard urethane foam. The heat insulating box of claim 1, wherein at least one side of the outer box is formed with an injection port for injecting the raw material of the hard urethane foam into the first space; a side of the outer casing of the inlet, a plurality of the vacuum insulation materials are disposed opposite to each other; at least one of the vacuum insulation materials forms a notch at at least one corner; the injection port is formed with The gap is opposite. The heat insulating box according to claim 1, wherein the ratio of the area occupied by the vacuum heat insulating material on each of the left and right side portions and the back portion of the outer box exceeds 70%. The heat insulating box according to claim 1, wherein a hard amine urethane foam is used, and the pre-expansion density is set to 35 kg/m ³ or more, and the heat insulating box is The proper packaging amount of the body is set to 60 kg/m ³ or more. A refrigerator comprising: the heat insulating box according to any one of claims 1 to 8; and a cooling device for cooling air supplied to a storage chamber formed in the heat insulating box. A drinking water storage device, comprising: the heat insulating box according to any one of claims 1 to 8; a heating device for heating water; The water tank is disposed in the heat insulation box and stores water heated by the heating device.