JP2011122739A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable attachment of the same type of vacuum heat insulating panels to a right and left walls of a refrigerator even if configurations of both faces of the walls are different from each other, then to prevent wrong attachment on the right and left walls, improve a work efficiency and to reduce a production cost. <P>SOLUTION: A notch part 5a is provided along an inclined face 2a of a machine chamber 8 in a lower end corner part of a rear edge of the vacuum heat insulating panel 5, and similarly, an inclined notch part 5b is provided in an upper corner part of the rear edge. A face having recessed grooves 9, 10 formed thereon are arranged to face the outer side of a heat insulating casing 2. Thus, by vertically inverting the vacuum heat insulating panel 5, the vacuum heat insulating panels 5 can be arranged on either of the right and left walls. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a refrigerator in which a vacuum heat insulation panel is incorporated in a heat insulation box.

  In recent years, for example, in refrigerators for home use, in order to improve the heat insulation performance of the heat insulation box and reduce the amount of power consumption, in addition to the urethane foam conventionally used for heat insulation, it is thin and excellent vacuum Insulating panels have been adopted. This type of vacuum heat insulation panel is made of, for example, glass wool, which is a thin fiberglass cotton material, matted to form a core material, and this core material is inserted into a gas barrier container made of aluminum foil and a synthetic resin laminated film. This is a heat insulating panel in which the inside of the container is kept in a vacuum reduced pressure state by evacuating the inside and closing the opening. This vacuum heat insulation panel has low thermal conductivity, and even if it is thin, high heat insulation performance can be obtained.

  For example, Patent Document 1 discloses a refrigerator in which vacuum heat insulation panels are arranged on left and right side walls, a part of a back wall, and a bottom wall of a heat insulation box. In this heat insulation box, a vacuum heat insulation panel is disposed between the outer box made of steel plate and the inner box made of hard resin so as to be in close contact with the inner surface of the outer box, and then the outer wall is embedded so as to embed this vacuum heat insulation panel. It is configured by filling urethane foam between the box and the inner box. According to such a structure, since a vacuum heat insulation panel can be arrange | positioned without thickening the wall thickness of a heat insulation box, heat insulation performance can be improved, ensuring the refrigerator interior volume.

  In this case, for example, as shown in part in FIG. 10, a machine room 101 in which a compressor for a refrigeration cycle and the like are disposed is provided at the lower end of the rear (rear side) of the main body 100 of the refrigerator. With respect to the machine room 101, in order to improve heat dissipation and secure a space, the left and right side walls are not provided with a heat insulating material, and are thin walls with only an outer box. Therefore, among the heat insulating boxes constituting the main body 100, the vacuum heat insulating panel 104 accommodated in the left and right side walls 102 (only the right side wall is shown) has a vertically long, substantially rectangular plate shape and has a corner at the lower end on the back side. It is configured in a form having a notch 104 a that is cut obliquely in accordance with the machine room 101.

JP-A-10-253243

By the way, in this kind of refrigerator, there exists what is provided so that the heat radiating pipe which comprises a part of capacitor | condenser of a refrigerating cycle may be buried in the right-and-left side wall 102 of a heat insulation box. Although not shown, the heat radiating pipe is provided in a state of being in thermal contact along the inner surface of the outer box. For example, the heat radiating pipe extends upward from the machine room 101 to the left side wall 102 of the heat insulating box, and the upper end of the left side wall 102. U-turn at the part and extend downward to return to the machine room 101, and further, the right side wall 102 of the heat insulation box extends upward, and the U-turn at the upper end of the right side wall 102 extends downward to return to the machine room 101. Placed in.
Thus, when disposing the heat radiating pipe along the inner surface of the outer box, as shown also in FIGS. 11 and 12, one side of each of the left and right vacuum heat insulating panels 103 and 104 (outer box side) The concave grooves 103b and 104b in which the heat radiating pipes are disposed are formed on the surface of FIG.

  However, as described above, when the groove portions 103b and 104b are provided on one surface of the vacuum heat insulating panels 103 and 104, that is, when one surface and the opposite surface are different from each other, the bottom notch Due to the relationship with the parts 103a and 104a, separate vacuum insulating panels 103 and 104 for the left and right side walls 102 of the heat insulating box are necessary.

  In such a configuration, for example, when assembling the heat insulating box, there is a problem that selection mistakes of the left and right vacuum heat insulating panels 103 and 104 are likely to occur and work efficiency is lowered. Furthermore, since two different types of left and right vacuum heat insulation panels 103 and 104 are required, there is a problem in that extra cost is required for manufacturing the vacuum heat insulation panels 103 and 104 and managing components. Such a situation also occurs when the one surface and the opposite surface of the vacuum heat insulation panel incorporated in the left and right side walls of the heat insulation box are made of different materials.

  The present invention has been made in view of the above circumstances, and its purpose is to incorporate a vacuum heat insulation panel in each of the left and right side walls of the heat insulation box, and one surface of each vacuum heat insulation panel. Even if the opposite surface is made of different shapes or different materials, the left and right vacuum insulation panels can be used in common, thus preventing mistakes in attaching the left and right vacuum insulation panels to improve production efficiency. An object of the present invention is to provide a refrigerator capable of improving costs and reducing costs by reducing labor for manufacturing and parts management.

  In order to achieve the above-described object, the refrigerator of the present invention includes an inner box and an outer box to form a heat insulation box, a storage chamber inside the heat insulation box, and a machine behind the heat insulation box. In the refrigerator provided with a chamber, a vacuum heat insulation panel is incorporated in each of the left and right side walls of the heat insulation box, and each of the vacuum heat insulation panels is different from the other surface on one side. It is made of a shape or a different material, and a notch is formed at the corners of the upper and lower ends of one side edge, and each of the vacuum heat insulating panels faces the one surface outward, and The notch is located in the left and right side walls of the heat insulation box in a form in which the notch is positioned on the rear side.

  According to the present invention, notches are formed in the corners at both the upper and lower ends of one side edge of the vacuum heat insulation panel, and one surface of each vacuum heat insulation panel faces outward and the notch In a form that is positioned on the rear side, the heat insulating box is arranged in the left and right side walls. According to this, even if the one surface and the opposite surface of the vacuum heat insulation panel are made of different shapes or different materials, the vacuum heat insulation panel is turned upside down to be used for both left and right sides. The vacuum insulation panel can be shared. As a result, it is possible to prevent the left and right attachment of the vacuum heat insulating panel from being mistaken, improve the workability of assembling the heat insulating box, reduce the labor of manufacturing the vacuum heat insulating panel itself and manage parts, and reduce costs.

The perspective view of the refrigerator main body which shows the 1st Example of this invention and removes a door Transverse plan view of the right side wall of the heat insulation box along the line AA in FIG. Enlarged transverse plan view of part B in FIG. Perspective view from the right rear of the refrigerator body Side view showing a vacuum insulation panel Transverse plan view along line CC in FIG. Longitudinal side view along line DD in FIG. Longitudinal front view showing a part of the bottom of the vacuum insulation panel FIG. 5 equivalent view showing a second embodiment of the present invention The perspective view which shows a prior art example and shows a refrigerator main body from the right rear Side view showing two types of left and right vacuum insulation panels Transverse plan view along line FF in FIG.

The first embodiment of the present invention will be described below with reference to FIGS.
First, FIG.1 and FIG.4 has shown the external appearance structure of the refrigerator main body 1 which concerns on a present Example. Here, the refrigerator main body 1 is configured by incorporating a refrigeration cycle (not shown) or the like in a heat insulating box 2 having a vertically long rectangular box shape with an open front. Moreover, although detailed description is abbreviate | omitted, the inside of the heat insulation box 2 is divided into upper and lower sides (and some right and left), and several storage chambers 7, such as a refrigerator compartment, a vegetable compartment, a freezer compartment, are provided. Although illustration is omitted, a hinged heat-insulating door or a drawer-type heat insulating door is provided on the front surface of each storage chamber 7.

  As shown in FIG. 2 and the like, the heat insulating box 2 combines a steel plate outer box 3 and a synthetic resin inner box 4 accommodated in the outer box 3, and these outer boxes. 3 and the inner box 4 are filled with a foam heat insulating material such as urethane foam. At this time, in the present embodiment, the vacuum heat insulation panels 5 are incorporated in the left and right side walls of the heat insulation box 2. The vacuum heat insulation panel 5 will be described later.

  As shown in FIG. 4, a machine room 8 is formed in the lower rear portion of the refrigerator body 1. Although not shown, the machine room 8 is provided with a compressor, a condenser, a cooling fan device, and the like that constitute a refrigeration cycle. The front wall of the machine room 8 is an inclined surface 2a, and the left and right side walls of the machine room 8 are not provided with the inner box 4 and the foam heat insulating material. Is done. By configuring the heat insulation box 2 so as to avoid the machine room 8, the space of the machine room 8 is secured.

  In the present embodiment, the heat radiating pipe 11 (see FIGS. 2 and 3) constituting a part of the capacitor is provided in a state of being in thermal contact along the inner surface of the outer box 3. Although not shown in detail, the heat radiating pipe 11 extends, for example, from the machine room 8 to the left side wall of the heat insulation box 2 upward, makes a U-turn at the upper end of the left side wall, and extends downward to return to the machine room 8. Further, the heat insulating box 2 is disposed so as to extend upward on the right side wall, to make a U-turn at the upper end of the right side wall, to extend downward, and to return to the machine room 8. In this case, the heat radiating pipe 11 is disposed so as to be substantially plane symmetric (mirror symmetric) at the left and right side wall portions of the heat insulating box 2 (outer box 3). In addition, as shown in FIG. 3, the said heat radiating pipe 11 is being fixed in the several places of the outer case 3 with the aluminum tape 12 excellent in heat resistance and heat conductivity, for example.

  Now, the vacuum heat insulation panel 5 (only right side is shown) is assembled in the left and right side walls of the heat insulation box 2 so as to be attached to the inner surface of the outer box 3. The vacuum heat insulation panel 5 has a substantially rectangular plate shape that is slightly smaller than the left and right side walls of the heat insulation box 2, and the thickness dimension thereof is less than half the thickness of the entire side wall of the heat insulation box 2. Has been. Therefore, on both the left and right wall sides of the heat insulating box 2, the vacuum heat insulating panel 5 occupies a part of the space 6 formed by the outer box 3 and the inner box 4 near the outer box 3, and the remaining part is It is designed to be filled with foam insulation made of urethane foam. Here, the vacuum insulating panels 5 having the same structure (same type) are incorporated into the left and right side walls of the heat insulating box 2 so as to be plane-symmetric. Hereinafter, the vacuum insulation panel 5 on the right side will be described in detail.

  First, the external shape of the vacuum heat insulation panel 5 will be described. As shown in FIGS. 4 and 5, the vacuum heat insulation panel 5 has a vertically long, substantially rectangular plate shape, and follows the inclination of the inclined surface 2 a forming the front wall of the machine room 8 at the lower end corner portion of the rear edge portion. Thus, the inclined notch 5a is formed in a form that avoids the machine room 8. Further, an inclined notch 5b is similarly formed at the upper corner of the rear edge of the vacuum heat insulating panel 5. That is, the notches 5 a and 5 b are formed in a line-symmetric form with respect to the vertical direction of the vacuum heat insulating panel 5.

  And, on the surface on the outer box 3 side which is one surface of the vacuum heat insulation panel 5, it extends in the vertical direction of the vacuum heat insulation panel 5 from the upper edge portion to the lower edge portion, and has two front and rear cross sections. Trapezoidal concave grooves 9 and 10 are provided (see FIGS. 2 to 6). As shown in FIGS. 2 and 3, a heat radiating pipe 11 provided on the inner surface of the outer box 3 is arranged in the recessed groove portions 9 and 10. Further, the opposite surface of the vacuum heat insulating panel 5 (the surface facing the inner box 4 side) has a flat shape (excluding the folded portion of the outer packaging material (bag body) 15 described later). ). Therefore, in the present embodiment, the vacuum heat insulation panel 5 has a shape in which one surface and the opposite surface are different from each other.

Next, the structure of the vacuum heat insulation panel 5 itself will be described with reference to FIGS.
The vacuum heat insulation panel 5 is configured by covering a core material 13 having heat insulation performance with an outer packaging material 15 as a bag body. As shown in detail in FIG. 8, the core material 13 is formed by compressing and curing a laminated material 13a of inorganic fibers such as glass wool in an inner packaging material 14 made of a synthetic resin film such as polyethylene. Has been. At this time, the laminated material 13a is compression-cured by using a mold having a convex shape corresponding to the notches 5a and 5b and the recessed grooves 9 and 10, so that the core material 13 is notched 5a and 5b and the recessed grooves 9. 10 is formed.

After the laminated material 13a accommodated in the inner packaging material 14 is compression-cured to obtain the core material 13, the core material 13 is accommodated in the outer packaging material 15, and the inside of the outer packaging material 15 is evacuated and depressurized. The vacuum heat insulation panel 5 is obtained by sealing the outer packaging material 15 by sealing the opening of the outer packaging material 15 by heat welding while maintaining the reduced pressure.
At this time, the outer packaging material 15 is formed by laminating (laminating) two laminated films at the peripheral portion, but one surface of the vacuum heat insulating panel 5, that is, the groove portions 9, 10. The first laminated film 16 constituting the surface having the surface and the second laminated film 17 constituting the opposite surface (flat surface) are different in material and, as a result, have different thermal conductivity. It is supposed to be.

  That is, as shown in FIG. 8, the first laminated film 16 includes a surface protective layer 16a, an aluminum vapor deposition layer 16b serving as a gas barrier layer, and a heat welding layer 16c in order from the outside toward the core material 13 side. It has a three-layer structure. On the other hand, the second laminated film 17 has a three-layer structure having a surface protective layer 17a, an aluminum foil layer 17b serving as a gas barrier layer, and a heat welding layer 17c in this order from the outside toward the core member 13 side. Has been. That is, the first laminated film 16 and the second laminated film 17 differ in that the material of the gas barrier layer is the aluminum vapor deposition layer 16b or the aluminum foil layer 17b. In the present embodiment, the first laminated film 16 on the side having low thermal conductivity is arranged on the outer box 3 side which is one surface.

  In the first and second laminated films 16 and 17, the surface protective layers 16a and 17a are made of a relatively heat-resistant synthetic resin such as polyethylene terephthalate. Moreover, the heat welding layers 16c and 17c are made of a synthetic resin having a heat welding property such as high density polyethylene. The surface of the first laminated film 16 and the surface of the second laminated film 17 and the surface of the heat-welded layer 17c of the second laminated film 17 are overlapped to face each other, and then the first laminated film is pressurized and heated. 16 and the second laminated film 17 are heat-welded to form a sealed bag-shaped outer packaging material 15.

  At this time, an adhesive ear 18 is provided on the outer edge of the vacuum heat insulating panel 5 so as to protrude around the core 13. In order to obtain a sufficient sealing property between the first laminated film 16 and the second laminated film 17, it is necessary to sufficiently increase the heat welding area, and the ear portion 18 is provided wide. As shown in FIG. 8, the upper and lower ears 18 are folded back toward the storage chamber 7 and are bonded and fixed along the surface of the second laminated film 17 with an adhesive or the like. Moreover, although not shown in figure, also in the ear | edge part 18 along notch part 5a, 5b, it is similarly folded | folded by the storage chamber 7 side along the slope of notch part 5a, 5b, and the 2nd laminated | multilayer film It is bonded and fixed with an adhesive or the like along the surface 17.

Here, the reason why the material of the metal layer serving as the gas barrier layer is different between the first laminated film 16 and the second laminated film 17 in the aluminum vapor deposition layer and the aluminum foil layer will be briefly described. .
Usually, in order to maintain a vacuum state inside the vacuum heat insulating panel, a core material is housed in an outer packaging material (bag body) excellent in gas barrier performance and sealed under reduced pressure. In general, a laminated film composed of a metal layer and a synthetic resin layer is used for the outer packaging material, and it is known that when an aluminum foil is used for the metal layer, gas barrier performance is excellent. However, since the aluminum foil itself has a high thermal conductivity, it travels through the portion where the outer packaging material is thermally welded, that is, the portion where the two films including the metal layer overlap and adhere to each other at the outer peripheral portion of the outer packaging material. Thus, there is a problem that a heat bridge in which heat conduction occurs from one surface of the vacuum heat insulating panel to the other surface causes a decrease in heat insulating performance. On the other hand, when an aluminum vapor deposition layer is used for the metal, since the thermal conductivity is lower than that of the aluminum foil, the amount of heat conduction on the front and back surfaces can be reduced to suppress the influence of the heat bridge. However, the first laminated film 16 provided with the aluminum vapor-deposited layer 16b has a disadvantage that it is more expensive than the second laminated film provided with the aluminum foil layer 17b. It is preferable to employ the laminated film provided.

  As shown for reference, in a test specimen having a width of 20 mm of a vacuum heat insulating panel constituted by using an aluminum vapor-deposited layer or an aluminum foil layer as the metal layer, the thermal conductivity of each of the specimens composed of the aluminum vapor-deposited layer is 0. The test result was 0.006 w / (m · k) in the case of the aluminum foil layer, whereas it was 0035 w / (m · k).

  For the above reason, in the present embodiment, in the outer packaging material 15 of the vacuum heat insulating panel 5, the first laminated film 16 provided facing the outer surface of the heat insulating box 2 and in contact with the inner surface of the outer box 3 is heated. By adopting a configuration including the aluminum vapor deposition layer 16b having a sufficiently low conductivity, the amount of heat conduction is reduced and the influence of the heat bridge is suppressed. Moreover, the 2nd laminated | multilayer film 17 provided facing the inner side of the heat insulation box 2 and in contact with a foam heat insulating material is set as the structure containing the aluminum foil layer 17b, and as a whole, maintaining gas barrier performance. I try to keep costs down.

  So far, the vacuum heat insulation panel 5 arranged in the right side wall of the heat insulation box 2 has been described, but the vacuum heat insulation panel 5 arranged in the left side wall of the heat insulation box 2 has the same configuration. That is, the vacuum heat insulation panel 5 provided on the left side wall and the vacuum heat insulation panel 5 provided on the right side wall are arranged so as to be plane symmetric. In this case, for example, when the vacuum heat insulation panel 5 disposed on the right side wall of the heat insulation box 2 is turned upside down (rotated 180 degrees) about an axis extending in the front-rear direction through the center in the up-down direction, the upper and lower notches Although the portions 5a and 5b are oppositely arranged, they can be arranged on the left wall portion of the heat insulating box 2 as they are. The reverse is also true.

  In manufacturing the heat insulating box 2, the heat radiating pipe 11 is attached to the inner surface of the portion constituting the left and right side walls of the outer box 3 with the aluminum tape 12. With respect to the inner surface of the part which comprises the left and right side walls of the heat insulating box body 2 in the outer box 3, the two vacuum heat insulating panels 5 come to a position where the recessed groove parts 9 and 10 escape the heat radiating pipe 11 and the notch part 5a. 5b is positioned and arranged so as to come to the rear (machine room 8 side), and is attached to the outer box 3 by, for example, a hot melt adhesive. Thereafter, the outer box 3 and the inner box 4 are joined, and further, a foamed heat insulating material such as urethane foam is filled in the space. Thus, the left and right side walls of the heat insulation box 2 have a double heat insulation structure of the vacuum heat insulation panel 5 and the urethane foam, and high heat insulation performance can be obtained.

In this embodiment, the following actions and effects can be obtained.
According to the configuration of the present embodiment, the vacuum heat insulation panel 5 incorporated in the left side wall and the right side wall of the heat insulation box 2 has a configuration in which one surface and the opposite surface are different from each other in terms of shape and material. However, since the notches 5a and 5b that avoid the machine room 8 are provided symmetrically in the upper and lower corners of the rear edge portion, either the left or right wall portion can be obtained by turning the vacuum heat insulating panel 5 upside down. Can also be attached to. As a result, one type of vacuum heat insulation panel 5 can be shared by the left and right side walls, and the left and right attachment mistakes of the vacuum heat insulation panel 5 can be prevented in the assembly of the heat insulation box 2. Workability can be improved. Further, it is possible to reduce the cost by reducing the labor of manufacturing the vacuum insulation panel 5 itself and managing parts.

In the present embodiment, in the outer packaging material 15 which is a bag constituting the vacuum heat insulation panel 5, the first laminated film 16 located on the outer box 3 side includes the aluminum vapor deposition layer 16b having a low thermal conductivity. The second laminated film 17 that is configured and located on the inner box 4 side includes the aluminum foil layer 17b, so that the cold air in the storage chamber 7 is transmitted to the outer box 3 and escapes outside. Bridges can be suppressed, and the heat insulating performance of the heat insulating box 2 can be further improved.
Moreover, since the ear portion 18 provided around the outer packaging material 15 of the vacuum heat insulating panel 5 is folded back to the storage chamber 7 side, the heat bridge at the folded portion can be suppressed, and the influence of the heat bridge can be reduced. It can reduce more effectively.
Furthermore, the second laminated film 17 on the side facing the inner box 4 of the outer packaging material 15 of the vacuum heat insulating panel 5 is configured to include the aluminum foil layer 17b, so that sufficient heat insulating performance can be obtained, Increase in cost can be suppressed.

FIG. 9 shows a second embodiment of the present invention. The shape of the notches 19a and 19b provided in the vacuum heat insulation panel 19 is different from that of the first embodiment.
That is, in the first embodiment, the vertical corners of the rear edge of the vacuum heat insulation panel 5 are triangularly shaped so that the corners perpendicular to the vertical direction of the vacuum heat insulation panel 5 are line symmetrical. In this second embodiment, the upper and lower corners of the rear edge of the vacuum heat insulation panel 19 are arranged along the side surface shape of the machine room 8 in the rear portion. The horizontal portion and the inclined portion at the front thereof are provided with cutout portions 19a and 19b having right-angled corner portions cut into a trapezoidal shape. Also in this case, the upper and lower cutout portions 19 a and 19 b can be formed so as to have a line-symmetric form with respect to the vertical direction of the vacuum heat insulating panel 19.
In the second embodiment, the same effect as that of the first embodiment can be obtained.

  In addition, in the said Example, although this invention was applied to the refrigerator of the type provided with the machine room 8 in the back lower part of the refrigerator main body 1, this invention is also applied to the refrigerator of the type provided with the machine room in the back upper part of the refrigerator main body 1. Can be applied. In this case, the cutouts formed at the upper and lower corners of one side edge of the vacuum heat insulating panel may be of a shape that escapes the machine room, other than the two types of shapes described above. You may form a notch part in a slightly different shape (shape which does not become strictly line symmetrical in the up-down direction).

  Moreover, in the structure of the vacuum heat insulation panel 5, as a material of the core material 13, for example, the laminated material 13a may be an organic fiber instead of an inorganic fiber. Furthermore, the core material 13 is not limited to the one in which the inorganic fiber laminated material 13a is housed in the synthetic resin film encapsulating material 14 and is compression-cured, and the organic and inorganic fiber laminated material can also be organic or inorganic. It may be molded into a board shape with a binder.

  Various changes can be made to the material of the laminated film constituting the outer packaging material 15. For example, the metal layer of the first laminated film 16 may have a multilayer structure in which a plurality of aluminum deposited layers are laminated. Alternatively, the metal layer of the second laminated film 17 may have a multilayer structure in which a plurality of aluminum foil layers are laminated.

  Further, in the above embodiment, the vacuum heat insulating panel 5 is different in shape and material from one surface and the surface on the opposite side. The present invention can be applied. Moreover, in the said Example, although the vacuum heat insulation panel 5 was provided in the right and left side wall of the heat insulation box 2, in addition to that, in the bottom wall part of the heat insulation box 2, the back wall part, and also the upper wall part Alternatively, a vacuum insulation panel may be provided.

  In addition, this invention is not limited to said each Example, For example, the structure of each chamber in a refrigerator main body, the structure (arrangement | positioning) of a heat radiating pipe, and the structure (arrangement | positioning, number) of a ditch | groove part of a vacuum heat insulation panel In addition, various changes can be made with respect to the presence or absence of the foam heat insulating material and the like, and the like can be implemented with appropriate changes within a range not departing from the gist.

  In the drawings, 1 is a refrigerator body, 2 is a heat insulation box, 3 is an outer box, 4 is an inner box, 5 and 19 are vacuum heat insulation panels, 5a, 5b, 19a and 19b are notches, 7 is a storage room, 8 Is a machine chamber, 9 and 10 are concave grooves, 11 is a heat radiating pipe, 13 is a core material, 15 is an outer packaging material (bag), 16b is an aluminum vapor deposition layer, 17b is an aluminum foil layer, and 18 is an ear.

Claims (6)

An inner box and an outer box constitute a heat insulation box,
In the refrigerator having a storage room inside the heat insulation box and a machine room behind the heat insulation box,
In the left and right side walls of the heat insulation box, vacuum insulation panels are incorporated, respectively.
Each of the vacuum heat insulating panels is configured such that one surface and the opposite surface are made of different shapes or different materials, and notches are formed at the corners of the upper and lower ends of one side edge. And
Each of the vacuum heat insulation panels is disposed in the left and right side walls of the heat insulation box in a form in which the one surface is directed to the outside and the notch is located on the rear side. Features a refrigerator. The upper and lower cutouts of the vacuum insulation panel are formed symmetrically with respect to the vertical direction of the vacuum insulation panel,
The refrigerator according to claim 1, wherein the vacuum heat insulation panel provided in the left side wall of the heat insulation box and the vacuum heat insulation panel provided in the right side wall are arranged to be plane-symmetric.   The refrigerator according to claim 1 or 2, wherein the vacuum heat insulation panel has a concave groove portion on the one surface, and a heat radiating pipe is disposed in the concave groove portion. The vacuum heat insulation panel includes a core material and a bag body covering the core material,
The material of the bag body is assumed to have different thermal conductivity between the part constituting one surface and the part constituting the opposite surface of the vacuum heat insulating panel,
The refrigerator according to any one of claims 1 to 3, wherein the vacuum heat insulation panel is incorporated with the bag body having a low thermal conductivity arranged on the outer box side. The vacuum heat insulating panel has an adhesive ear portion that protrudes the bag body around the core material,
The refrigerator according to claim 4, wherein the ear portion is folded back toward the storage chamber and arranged along the opposite surface.   The refrigerator according to claim 4 or 5, wherein a side having a low thermal conductivity of the bag includes an aluminum vapor deposition layer, and a side having a high thermal conductivity includes an aluminum foil layer.

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