JP2014009849A - Heat insulation box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent occurrence of an unfilled part of a foam heat insulation material as much as possible, in a heat insulation box comprising a heat insulation panel and the foam heat insulation material as a heat insulation material of a heat insulation wall.SOLUTION: A heat insulation box includes a heat insulation wall configured such that a heat insulation panel preliminarily formed between an inner box and an outer box and a foam heat insulation material filled with foaming-in-place are provided. A portion of the heat insulation wall where the heat insulation panel exists, the thickness of the heat insulation panel becomes thicker than that of the foam heat insulation material, and a cross section area increase part where the cross section of the foam heat insulation material partially becomes large is provided.

Description

  Embodiments of the present invention relate to a heat insulating box.

  For example, the heat insulation box which comprises the cabinet of a refrigerator is equipped with the heat insulation wall which provided the heat insulating material between the inner box and the outer box. In recent years, as a heat insulating material, a foam heat insulating material filled by in-situ foaming and a vacuum heat insulating panel excellent in heat insulating performance are used in combination. By adopting such a configuration, it is possible to reduce the thickness of the heat insulating wall as compared with the heat insulating material made of only the foam heat insulating material, and consequently increase the storage capacity of the heat insulating box. Is possible. In order to further improve the heat insulating performance, it is considered to increase the thickness of the vacuum heat insulating panel and to reduce the thickness of the foam heat insulating material as much as possible.

  However, the foam insulation material has a high viscosity of the undiluted solution and fills the space while the undiluted solution is foamed (while expanding the volume). Therefore, when the space to be filled becomes narrow, the filling becomes insufficient. There is a concern that unfilled portions are likely to occur, and that the appearance of the unfilled portions is deteriorated (for example, air enters, the volume decreases due to cooling, and dents appear on the appearance).

Japanese Patent No. 2728318 (see FIGS. 4 and 5)

  Accordingly, an object of the present invention is to provide a heat insulating box that can prevent the occurrence of unfilled portions of the foam heat insulating material as much as possible in the structure in which the heat insulating panel and the foam heat insulating material are used in combination as the heat insulating material of the heat insulating wall.

  The heat insulation box of this embodiment is provided with the heat insulation wall comprised by providing the heat insulation panel previously formed between the inner box and the outer box, and the foam heat insulating material with which it is filled by on-site foaming. In the part where the heat insulating panel exists in the heat insulating wall, the cross-sectional area increase is set so that the thickness of the heat insulating panel is thicker than the foam heat insulating material in a range of more than half and the cross sectional area of the foam heat insulating material is locally increased. A portion is provided.

External appearance perspective view of heat insulation box which shows 1st Embodiment Transverse plan view along line X2-X2 in FIG. Longitudinal front view along line X3-X3 in FIG. Schematic perspective view from the back side of the heat insulation box for explaining the state when filling the foam heat insulating material Schematic sectional view for explaining the unfilled part FIG. 1 equivalent view showing the second embodiment 4 equivalent diagram FIG. 1 equivalent diagram showing the third embodiment 4 equivalent diagram FIG. 1 equivalent diagram showing the fourth embodiment Longitudinal side view along line X11-X11 in FIG. 4 equivalent diagram Cross-sectional view of left side wall showing fifth embodiment FIG. 1 equivalent diagram showing the sixth embodiment Longitudinal front view of main parts 4 equivalent diagram FIG. 1 equivalent diagram showing a seventh embodiment 4 equivalent diagram FIG. 4 equivalent view showing the eighth embodiment

Hereinafter, the heat insulation box of the refrigerator by a plurality of embodiments is explained based on a drawing. In addition, in each embodiment, the same code | symbol is attached | subjected to the substantially same component, and description is abbreviate | omitted.
(First embodiment)
A first embodiment will be described with reference to FIGS. First, the external appearance of the heat insulation box 1 of a refrigerator is shown by FIG. The heat insulation box 1 includes a left side wall 2, a right side wall 3, a rear wall 4, a bottom wall 5, and a ceiling wall 6, and has a rectangular box shape that is open as a whole and is long in the vertical direction. Yes. The left side wall 2, the right side wall 3, the rear wall 4, the bottom wall 5, and the ceiling wall 6 each constitute a heat insulating wall. The inner surfaces of these walls 2 to 6 are constituted by an inner box 7, and the outer surface is constituted by an outer box 8.

  The inner box 7 is formed of, for example, a synthetic resin, and integrally includes a left side surface portion, a right side surface portion, a rear surface portion, a bottom surface portion, and a ceiling surface portion that form the inner surfaces of the walls 2 to 6. The front is open and has a rectangular box shape that is long in the vertical direction. The interior of the inner box 7 is a storage space 9. The outer box 8 is disposed outside the inner box 7 so as to cover the inner box 7 from the outside. The outer box 8 is formed of a metal plate such as a steel plate, and has a left side surface portion, a right side surface portion, a rear surface portion, a bottom surface portion, and a ceiling surface portion that form the inner surfaces of the walls 2 to 6. The front is open and has a rectangular box shape that is long in the vertical direction.

  And as shown in FIG. 2, inside each wall 2-6, as a heat insulating material, the vacuum heat insulating panel 10 as a heat insulating panel previously formed in the shape of a panel, and the foam heat insulating material (in-situ foaming) ( For example, rigid urethane foam) 11 is provided. How to provide the vacuum heat insulating panel 10 and the foam heat insulating material 11 will be described later.

  A flange portion 8a of the outer box 8 is located on the front surfaces of the left side wall 2, the right side wall 3, the bottom wall 5 and the ceiling wall 6 constituting the peripheral edge of the front opening of the storage space 9, and the flange portion 8a. Is connected to the peripheral edge of the front portion of the inner box 7.

  The vacuum heat insulation panel 10 is manufactured in a panel shape (plate shape) by storing a core material made of glass wool or the like in a mat shape in a packaging material having gas barrier properties and evacuating the packaging material. And it has excellent heat insulation performance. The vacuum heat insulation panel 11 is provided by being bonded and fixed to the inner surface of the surface portion corresponding to each of the walls 2 to 6 in the outer box 8 in a state of being formed in a panel shape in advance. The thickness t1 (see FIG. 3) of each vacuum insulation panel 10 is set to 15 mm or more, in this case, 16 mm.

  The foam heat insulating material 11 is filled in the space between the inner box 7 and the outer box 8 excluding the vacuum heat insulating panel 10 in the walls 2 to 6. In each of the walls 2 to 6, the basic thickness t2 (see FIG. 3) of the foam heat insulating material 11 at the site where the vacuum heat insulating panel 10 exists is set to 10 mm or less, in this case 9 mm. Therefore, in this case, the thickness t1 of the vacuum heat insulating panel 10 is set to be thicker than the basic thickness t2 of the foam heat insulating material 11 in the portions where the vacuum heat insulating panel 10 exists in each of the walls 2 to 6. (T1> t2). In addition, the basic overall thickness t3 (t1 + t2) of each of the walls 2 to 6 is 25 mm in this case (see FIG. 3).

  Here, in each of the walls 2 to 6, the inner box 7 that forms the inner surfaces of the left side wall 2 and the right side wall 3 has a convex portion that protrudes to the inner side of the storage space 9 that is opposite to the vacuum heat insulating panel 10. 12 are provided integrally. The convex portion 12 extends in the front-rear direction of the side walls 2, 3, and a plurality of steps are provided in parallel in the vertical direction. Each convex portion 12 has a rear end portion 12 a reaching the rear wall 4 and a front end portion 12 b reaching the front end portions of the side walls 2 and 3. The foam heat insulating material 11 is also filled in the concave portions which are the inside of the respective convex portions 12 (see FIG. 3). In the left side wall 2 and the right side wall 3, in the portion where the vacuum heat insulating panel 10 exists, the cross sectional area of the foam heat insulating material 11 is large in the concave portion of the convex portion 12, and each convex portion 12 has a cross sectional area of the foam heat insulating material 11. It functions as an increase part. In this case, the protrusion dimension A1 of the protrusion 12 (see FIG. 3) is set to about 14 mm. Therefore, the thickness of the foam heat insulating material 11 in the convex portion 12 is 9 mm + 14 mm, which is 23 mm.

  The foam heat insulating material 11 of each wall 2-6 is filled as follows. When filling the heat insulating box 1 with the foam heat insulating material 11, first, the inner box 7 and the outer box 8 are combined. At this time, the vacuum heat insulation panel 10 is bonded and fixed in advance to the inner surface of each surface portion of the outer box 8 with an adhesive. Thereby, a space for filling the foam heat insulating material 11 is formed between the inner box 7 and the outer box 8. And such a heat insulation box 1 shall be in the state which turned the rear wall 4 upward as shown in FIG. 4 (in other words, the state which turned down the front opening part of the storage space 9). At this time, an injection port 13 for injecting a stock solution of foam heat insulating material is formed in the rear surface portion which is the back surface of the outer box 8. In this case, the inlets 13 are arranged at two locations on the left and right side portions of the rear surface portion so as to correspond to the intermediate portions in the longitudinal direction of the left side wall 2 and the right side wall 3.

  In this state, a stock solution of foam heat insulating material is injected into the left side wall 2 and the right side wall 3 from each injection port 13. The injected stock solution flows to the bottom wall 5 and the ceiling wall 6 side along the flange portions 8a of the left side wall 2 and the right side wall 3, and then foams and expands volume while expanding the walls 2, 3, 5, 6 The space portions are also spread in the horizontal direction and the upward direction, and the foam heat insulating material 11 is filled in each space portion. Each convex portion 12 is also filled. At this time, in particular, the inner box 8 corresponding to the left and right side walls 2 and 3 is formed with a plurality of ridges 12 that increase the cross-sectional area filled with the foam heat insulating material 11, so that the left and right side walls The flow of the foamed heat insulating material 11 within 2 and 3 is promoted. The foamed heat insulating material 11 is finally filled into the space in the rear wall 4 after climbing up the walls 2, 3, 5 and 6. Therefore, in this case, the rear wall 4 is the most downstream part when the foam heat insulating material 11 is filled with foam. Then, all the spaces are filled with the foam heat insulating material 11, and the filled foam heat insulating material 11 is solidified to complete the filling of the heat insulating box body 1 with the foam heat insulating material 11. The vacuum heat insulation panels 10 of the walls 2 to 6 are also held and fixed by the foam heat insulating material 11 filled in the surroundings.

  In this case, in the left and right side walls 2 and 3, the area of the portion t2 where the thickness of the foam heat insulating material 11 is 10 mm or less in the portion where the vacuum heat insulating panel 10 exists is larger than the area of the portion where the convex portion 12 is present. It accounts for about 65%, which is 50% or more and 90% or less of the portion where the vacuum heat insulation panel 10 exists. Thereby, while being able to enlarge the capacity | capacitance compared with the past, the foam heat insulating material 11 can be filled with all the walls, and the heat insulation of the combined use of the vacuum heat insulating panel 10 and the foam heat insulating material (urethane) 11 also in a thin wall Is possible.

  When using the heat insulation box 1 manufactured in this way as a cabinet of a refrigerator, the convex part 12 of the inner box 7 is a shelf holding part for installing a shelf (not shown) in the storage space 9, or It can be used as a container holding part for holding a storage container (not shown). Therefore, the convex part 12 which comprises the cross-sectional area increase part of the foam heat insulating material 11 can be set as the structure which serves as at least one of a shelf holding part and a container holding part.

  According to the above-described embodiment, the following operational effects can be obtained. Of the respective walls 2 to 6 of the heat insulation box 1, in the portion where the vacuum heat insulation panel 10 exists in the left side wall 2 and the right side wall 3, the thickness t1 of the vacuum heat insulation panel 10 is the thickness occupying 50% or more. It is set to be thicker than the thickness t2 (t1> t2), and there is a concern that it is difficult to fill the foam heat insulating material 11. In this respect, in the present embodiment, the inner casing 7 of the left side wall 2 and the right side wall 3 is provided with convex portions 12 that increase the cross-sectional area of the foam heat insulating material 11 at a plurality of locations. It is possible to promote the flow of the foam heat insulating material 11 during foam filling, and to prevent the occurrence of an unfilled portion of the foam heat insulating material 11 as much as possible.

  Further, in this case, in the portion where the vacuum heat insulation panel 10 exists in the left side wall 2 and the right side wall 3, the range that occupies 50% or more sets the thickness t2 of the foam heat insulating material 11 to 10 mm or less, in this case, 9 mm, There is a concern that it is difficult to fill the foam heat insulating material 11. In this respect, in the present embodiment, as described above, the foamed heat insulation is provided in the inner box 7 of the left side wall 2 and the right side wall 3 by providing the convex portions 12 that increase the cross-sectional area of the foam heat insulating material 11 at a plurality of locations. It is possible to promote the flow of the foam heat insulating material 11 during foam filling of the material 11 and to prevent the occurrence of unfilled portions of the foam heat insulating material 11 as much as possible. Further, the thickness t2 of the foam heat insulating material 11 is preferably 7 mm or more in order to prevent unfilled portions.

  In each wall 2-6 of the heat insulation box 1, the thickness t1 of the vacuum heat insulation panel 10 is 15 mm or more, in this case 16 mm, and the total thickness of each wall 2-6 is 25 mm or more. When a vacuum leak of the vacuum heat insulation panel 10 occurs in the heat insulation wall, the heat insulation performance of the vacuum heat insulation panel 10 is lowered. For example, the vacuum heat insulation panel 10 having a heat insulation performance 7 to 10 times that of the foam heat insulation material (urethane) 11 has a heat insulation performance about half that of the foam heat insulation material 11 when a vacuum leak occurs.

  The heat insulating wall of a conventional refrigerator requires a thickness of 30 mm or more in the case of heat insulation using urethane alone. However, if the urethane thickness is 17 mm or more, there is no problem with dew condensation or the like. In this embodiment, when the thickness t1 of the vacuum heat insulating panel 10 is 16 mm and the thickness t2 of the foam heat insulating material 11 is 9 mm, the heat insulating performance of the vacuum heat insulating panel 10 when a vacuum leak occurs in the vacuum heat insulating panel 10 is as follows. The foam insulation material (urethane) 11 is equivalent to 8 mm (1/2 of 16 mm), and the foam insulation material 11 alone has a heat insulation thickness equivalent to 17 mm (9 mm + 8 mm). Accordingly, by setting the thickness of the vacuum heat insulation panel 10 to 15 mm or more and the thickness of the entire heat insulation wall to 25 mm or more, even when a vacuum leak occurs in the vacuum heat insulation panel 10, the outer surface is exposed to dew etc. Occurrence can be suppressed.

  In the heat insulation box 1, the vacuum heat insulation panel 10 is arrange | positioned to the rear wall 4 used as the most downstream part at the time of foam filling of the foam heat insulating material 11 (refer FIG. 2). In the portion that becomes the most downstream portion during foam filling of the foam heat insulating material 11, the filling property is lowered, and the unfilled portion 14 (see FIG. 5) of the foam heat insulating material 11 is likely to occur. In the present embodiment, since the vacuum heat insulation panel 10 is installed on the inner surface of the rear wall 4 which is the most downstream portion, even if the unfilled portion 14 of the foam heat insulating material 11 is generated, the outer box 8 It is possible to prevent as much as possible that dew condensation occurs on the outer surface of the glass and that the cooling performance is significantly reduced. In particular, by setting the most downstream portion as the rear wall 4, it is possible to make the appearance inconspicuous even if there is a depression or the like in the appearance.

  In addition, when filling the heat insulation box 1 with the foam heat insulating material 11, what becomes the most downstream part is not necessarily the rear wall 4. For example, when the inlet 13 is formed in the ceiling wall 6 and the foam heat insulating material 11 is foam-filled with the ceiling wall 6 facing upward, the most downstream portion at the time of foam filling is the ceiling wall 6.

In the heat insulation box 1, the convex portions 12 constituting the cross sectional area increasing portion of the foam heat insulating material 11 are not limited to the left and right side walls 2 and 3, but are also provided on the rear wall 4, the bottom wall 5, and the ceiling wall 6. May be.
(Second Embodiment)
6 and 7 show a second embodiment. The second embodiment is different from the first embodiment described above in the following points. In the left and right side walls 2 and 3 of the heat insulating wall body 1, the plurality of convex portions 16 constituting the cross-sectional area increasing portion of the foam heat insulating material 11 have the rear end portion 16 a reaching the rear wall 4. The portion 16 b does not reach the front end portions of the side walls 2 and 3, and stops behind the front end portions of the side walls 2 and 3. Also in the second embodiment having such a configuration, it is possible to obtain basically the same functions and effects as those of the first embodiment.

(Third embodiment)
8 and 9 show a third embodiment. The third embodiment differs from the first embodiment described above in the following points. On the left and right side walls 2, 3 in the heat insulating wall 1, the thick-wall-forming convex portion 17 constituting the cross-sectional area increasing portion that increases the cross-sectional area of the foam heat insulating material 11 is the center in the vertical direction of each side wall 2, 3. It is provided only at one place of the part. Each thick-wall-forming convex portion 17 has a vertical dimension that is set larger than the convex portion 12 of the first embodiment and the convex portion 16 of the second embodiment. In the same manner as the convex portion 12 of the first embodiment, each convex portion 17 has the rear end portion 17a reaching the rear wall 4 and the front end portion 17b substantially reaching the front end portions of the side walls 2 and 3. Yes. The foamed heat insulating material 11 is filled in the thick-wall-forming convex portions 17 in the same manner as the convex portions 12. The thickness of the foamed heat insulating material 11 in each of the thick-wall-forming convex portions 17 is set to 10 mm or more, in this case, about 28 mm, and the foamed heat insulating material 11 is more than the other portions of the left side wall 2 and the right side wall 3. The thickness of is increased. Also in the third embodiment having such a configuration, it is possible to obtain basically the same effects as the first embodiment.

(Fourth embodiment)
10 to 12 show a fourth embodiment. The fourth embodiment is different from the above-described second embodiment in the following points. An intermediate heat insulating partition 18 is provided at an intermediate portion in the vertical direction, which is substantially the center of the storage space 9, and the storage space 9 is divided into an upper storage chamber 19 and a lower storage chamber 20. The outer shell of the intermediate heat insulating partition 18 is provided integrally with the inner box 7, the left end is connected to the left side wall 2, the right end is connected to the right side wall 3, and the rear end is connected to the rear wall 4. ing. The intermediate heat insulating partition 18 extends in the left-right direction between the left and right side walls 2 and 3, and the front-rear direction extends from the rear wall 4 to the front opening of the storage space 9. The inside of the intermediate heat insulating partition 18 is also filled with the foam heat insulating material 11 like the other convex portions 16 (see FIG. 11), and this intermediate heat insulating partition 18 increases the cross-sectional area of the foam heat insulating material 11. The cross-sectional area increase part to be made is comprised. In this case, the thickness t4 (see FIG. 11) in the vertical direction of the intermediate heat insulating partition 18 is set to 15 mm or more, in this case, about 28 mm.

  Since the inside of the intermediate heat insulating partition 18 communicates with the left and right side walls 2, 3 and the rear wall 4, the presence of the intermediate heat insulating partition 18 at the time of foam filling of the foam heat insulating material 11 causes the foam heat insulating material 11 to Flow will be further promoted. Moreover, when manufacturing the heat insulation box 1, the intermediate heat insulation partition part 18 can also be manufactured simultaneously.

(Fifth embodiment)
FIG. 13 shows a fifth embodiment. The fifth embodiment differs from the first embodiment described above in the following points. In the heat insulation box 1, for example, on the left side wall 2, a heat radiation pipe 22 for the refrigeration cycle is disposed between the outer box 8 and the vacuum heat insulation panel 10. The heat radiating pipe 22 is provided on the left side wall 2 on the outer box 8 side. The vacuum heat insulation panel 10 is formed with a recess 23 for accommodating the heat radiating pipe 22. In this case, it is preferable that the heat of the heat radiating pipe 22 be easily conducted to the outer box 8 side using an aluminum foil or the like. Although not shown, the right side wall 3 is also provided with a heat radiating pipe 22 in the same manner as the left side wall 2.

  In such a configuration, the outer box 8 is warmed by the heat radiating pipe 22. For this reason, even if a vacuum leak occurs in the vacuum heat insulation panel 10 and the heat insulation performance of the vacuum heat insulation panel 10 is deteriorated, it is possible to suppress the occurrence of dew on the outer surface of the outer box 8.

(Sixth embodiment)
14 to 16 show a sixth embodiment. The sixth embodiment is different from the third embodiment described above in the following points. Intermediate heat insulating partition portions 24 and 25 having the same configuration as that of the intermediate heat insulating partition portion 18 of the fourth embodiment are provided on the upper and lower portions of both thick wall forming convex portions 17 of the left side wall portion 2 and the right side wall portion 3. Yes. Thereby, the storage space 9 is a second storage formed between the first storage chamber 26 above the upper intermediate heat insulation partition 24 and the upper intermediate heat insulation partition 24 and the lower intermediate heat insulation partition 25. The chamber 27 is divided into a third storage chamber 28 below the lower intermediate heat insulating partition 25. Each of the intermediate heat insulating partition portions 24 and 25 is also filled with the foam heat insulating material 11, and these intermediate heat insulating partition portions 24 and 25 also constitute a cross-sectional area increasing portion that increases the cross-sectional area of the foam heat insulating material 11. The thickness t5 (see FIG. 15) in the vertical direction of each intermediate heat insulating partition 24, 25 is set to 15 mm or more, in this case, about 28 mm.

  Here, the second storage chamber 27 located in the middle in the vertical direction is composed of two thick-wall-forming convex portions 17 facing the left side wall 2 and the right side wall 3, and the upper and lower intermediate heat insulating partition portions 24 and 25. It is surrounded and formed. These left and right thick-wall-forming convex portions 17 and the upper and lower intermediate heat insulating partition portions 24 and 25 each constitute a heat insulating wall, and the thickness dimension of each foam heat insulating material 11 is 15 mm or more. 28 mm, which is thicker than the other parts (in this case, the thickness of the foam heat insulating material 11 in the left side wall 2 and the right side wall 3 other than the thick part forming convex part 17 is 9 mm). Yes.

  When using the heat insulation box 1 comprised in this way as a refrigerator, the 2nd storage chamber 27 is used as a freezer room in which especially high heat insulation performance is required. In addition, the 1st storage chamber 26 is used as a refrigerator compartment, for example, and the 3rd storage chamber 28 is used as a vegetable compartment.

(Seventh embodiment)
17 and 18 show a seventh embodiment. The seventh embodiment is different from the above-described sixth embodiment in the following points. In this case, in the heat insulation box 1, the inlet 13 for injecting the stock solution of the foam heat insulating material 11 is formed at a position corresponding to the left side wall 2 and the right side wall 3 on the back surface of the outer box 8, and the bottom wall 5 and the ceiling wall 6 are heat insulating walls different from the heat insulating walls corresponding to the inlet 13. The bottom wall 5 and the ceiling wall 6 have a situation in which the foam heat insulating material 11 injected from the injection port 13 is less likely to be filled than the left side wall 2 and the right side wall 3. Therefore, in the present embodiment, in the inner box 7, thick portion forming portions 31 for increasing the thickness of the foam heat insulating material 11 are provided in the portions forming the inner surfaces of the bottom wall 5 and the ceiling wall 6, respectively. The bottom wall 5 and the ceiling wall 6 are formed thicker than in the fifth embodiment. The thickness of the foam insulation 11 on the bottom wall 5 and the ceiling wall 6 is set to 15 mm or more, in this case 28 mm.

  In such a configuration, the bottom wall 5 and the ceiling wall 6 that do not correspond to the inlet 13 can be easily filled with the foam heat insulating material 11, and the heat insulation performance thereof can be improved.

(Eighth embodiment)
FIG. 19 shows an eighth embodiment. The eighth embodiment is different from the first embodiment described above in the following points. In addition to the two locations corresponding to the left side wall 2 and the right side wall 3, the inlet 13 for injecting the stock solution of the foam heat insulating material 11 on the back surface of the heat insulating box 1 corresponds to the bottom wall 5 and the ceiling wall 6. There are also four places in total. In such a configuration, the bottom wall 5 and the ceiling wall 6 can be more easily filled with the foam heat insulating material 11.

(Other embodiments)
The left and right side walls 2 and 3, the rear wall 4, the bottom wall 5, and the ceiling wall 6, which are the heat insulating walls of the heat insulating box 1, have shown examples in which the vacuum heat insulating panel 10 and the foam heat insulating material 11 are used in combination as heat insulating materials. For example, the bottom wall 5 and the ceiling wall 6 may be made of only the foam heat insulating material 11 without using the vacuum heat insulating panel 10.

  As described above, according to the heat insulating box of the present embodiment, the heat insulating panel formed in advance as the heat insulating material of the heat insulating wall and the foam heat insulating material filled by in-situ foaming are used in combination. Even in the case where the thickness of the foam insulation is thinner than the insulation panel by providing the cross-sectional area increasing part that locally increases the sectional area of the foam insulation in the part where the insulation panel exists on the wall In addition, it is possible to promote the flow of the foam heat insulating material during foam filling of the foam heat insulating material, and to prevent the occurrence of an unfilled portion of the foam heat insulating material as much as possible.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  In the drawings, 1 is a heat insulating box, 2 is a left side wall (insulating wall), 3 is a right side wall (insulating wall), 4 is a rear wall (insulating wall), 5 is a bottom wall (insulating wall), 6 is a ceiling wall ( Heat insulating wall), 7 is an inner box, 8 is an outer box, 9 is a storage space, 10 is a vacuum heat insulating panel (heat insulating panel), 11 is a foam heat insulating material, 12 is a convex portion (cross-sectional area increasing portion), and 13 is an inlet , 16 is a convex part (cross-sectional area increasing part), 17 is a thick part forming convex part (cross-sectional area increasing part), 18 is an intermediate heat insulating partition part (cross-sectional area increasing part), 22 is a heat radiating pipe, and 24 and 25 are An intermediate heat insulating partition (cross-sectional area increasing portion), 26 is a first storage chamber, 27 is a second storage chamber (freezing chamber), 28 is a third storage chamber, and 31 is a thick portion forming portion.

Claims (11)

A heat insulation box provided with a heat insulation wall formed by providing a heat insulation panel formed in advance between an inner box and an outer box and a foam heat insulating material filled by in-situ foaming,
In the part where the thermal insulation panel exists in the thermal insulation wall, the range of more than half is set so that the thickness of the thermal insulation panel is thicker than the foam thermal insulation, and the cross-sectional area of the foam thermal insulation is locally increased. A heat-insulating box having a cross-sectional area increasing portion. A heat insulation box provided with a heat insulation wall formed by providing a heat insulation panel formed in advance between an inner box and an outer box and a foam heat insulating material filled by in-situ foaming,
In the part where the thermal insulation panel exists in the thermal insulation wall, there is a cross-sectional area increasing portion in which the thickness of the foam thermal insulation is set to 10 mm or less in a range of more than half and the sectional area of the foam thermal insulation is locally increased. A heat insulating box characterized by being provided.   The heat insulation box according to claim 1, wherein the heat insulation panel is disposed on a heat insulation wall which is the most downstream portion when the foam heat insulating material is filled with foam.   The heat insulation box according to any one of claims 1 to 3, wherein an intermediate heat insulation partition portion by the cross-sectional area increasing portion is provided in a substantially central portion of the storage space surrounded by the heat insulation wall. .   The heat insulation box according to any one of claims 1 to 4, wherein the cross-sectional area increasing portion also serves as at least one of a shelf holding portion and a container holding portion.   The thickness of the said heat insulation panel in the said heat insulation wall is 15 mm or more, and the whole thickness of the said heat insulation wall is 25 mm or more, The heat insulation box as described in any one of Claims 1-5 characterized by the above-mentioned.   The heat insulation box according to claim 1, wherein a heat radiation pipe is provided on the heat insulation wall on the outer box side.   Three or more storage chambers are formed above and below, and a heat insulating wall forming a storage chamber located in the middle of the storage chambers has a thickness of the foam heat insulating material thicker than the others, and is 15 mm or more. The heat insulation box as described in any one of claim | item 1 -7.   9. The heat insulation box according to claim 8, wherein the storage room in which the foam heat insulating material is thickened is a freezing room.   Among the heat insulating walls, the thickness of the foam heat insulating material in the heat insulating wall different from the heat insulating wall corresponding to the inlet into which the stock solution of the foam heat insulating material is injected is larger than the foam heat insulating material in the heat insulating wall corresponding to the inlet. The heat insulation box according to claim 1, wherein the heat insulation box is thick.   The inlet of the stock solution of the said foam heat insulating material is each provided in the back surface of the said outer box corresponding to each heat insulation wall with which the said foam heat insulating material is filled. The heat insulation box according to any one of 9.

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