JP2011247534A - Heat insulating housing of refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify adhesion work, and to improve productivity in adhering and disposing a plurality of sheets of vacuum heat insulating panels between an outer box and an inner box.SOLUTION: This heat insulating housing of a refrigerator includes the inner box, the outer box, and the plurality of vacuum heat insulating panels disposed in a state of being adhered to one another between the inner box and the outer box, and configures a plurality of walls of a refrigerator body. The inner box is configured by combining a plurality of inner box divided bodies obtained by dividing the entire inner box, the plurality of vacuum heat insulating panels are formed into shapes corresponding to the inner box divided bodies, and the vacuum heat insulating panels and the inner box divided bodies are adhered to each other.

Description

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

  Conventionally, for example, in a heat insulating box of a household refrigerator, urethane foam is filled as a heat insulating material between a plastic inner box having a rectangular box shape with an open front and an outer box made of a steel plate. In addition, a vacuum insulation panel that is thin and excellent in heat insulation has been used in combination with a part thereof. In recent years, in order to obtain better heat insulation performance, it has been proposed to use a vacuum insulation panel with the same thickness as the wall on each wall surface, and to attach a plurality of vacuum insulation panels directly to the outer and inner boxes. ing.

  In this case, the outer box is divided in advance into portions (referred to as divided plates) that constitute the left and right side surfaces, the ceiling surface, and the rear surface of the heat insulating box body, and the vacuum insulating panels are respectively provided on the inner surfaces of the divided plates. After attaching one surface, the other surface side of these vacuum heat insulation panels is attached to the outer surface of each wall of an inner box (for example, refer patent document 1).

  However, in the above-described heat insulation box body, when attaching the other surface of the vacuum heat insulation panel to the left and right side surfaces, the ceiling surface, and the back surface of the inner box, respectively, the vacuum heat insulation panel (dividing the outer box) Plate) must be held in a pressed state from multiple directions. For this reason, a jig for a bonding operation or a pressing device having a complicated configuration that matches the shape of the entire inner box is required, and there is a problem that equipment required for the mounting operation is expensive.

JP-A-4-260780 (FIG. 3)

  Therefore, there is a need to install a plurality of vacuum heat insulation panels between the outer box and the inner box, simplifying the bonding work and improving the productivity.

  The heat insulating box body of the refrigerator of the embodiment includes an inner box, an outer box, and a plurality of vacuum heat insulating panels that are bonded and provided therebetween, and constitutes a plurality of wall portions of the refrigerator main body. The inner box is configured by combining a plurality of inner box divided bodies obtained by dividing the entire inner box, and the plurality of vacuum heat insulation panels include the inner box divided bodies. Each of the vacuum heat insulation panels and the inner box divided bodies are bonded to each other.

The 1st Embodiment is shown, The exploded perspective view (a) and perspective view (b) of a heat insulation box Transverse plan view showing the configuration of the connecting portion of two wall surface units Exploded perspective view (a) and perspective view (b) of wall unit for left side wall Longitudinal sectional view for explaining the state of bonding work of the wall unit for the bottom wall Sectional drawing of the principal part which shows the folding structure of the ear | edge part of a vacuum heat insulation panel in order The perspective view of the principal part which shows the folding structure of the ear | edge part of a vacuum heat insulation panel in order. The longitudinal cross-sectional view which shows 2nd Embodiment and demonstrates the mode of adhesion | attachment and bending of a connection wall surface unit FIG. 4 equivalent view showing the third embodiment

(1) First Embodiment Hereinafter, a first embodiment will be described with reference to FIGS. FIG.1 (b) has shown the external appearance structure of the heat insulation box 1 of the refrigerator in this embodiment. The heat insulating box 1 as a whole has a vertically long, substantially rectangular box shape with an open front, and a plurality of vacuums described later are provided between a plastic inner box 2 and a steel plate outer box 3, for example. In order to attach the heat insulation panel 7, it is constituted by bonding. It should be noted that the attachment of the vacuum heat insulating panel 7 may employ a method such as engagement or clamping in addition to adhesion.

  Although not shown, the heat insulation box 1 incorporates a refrigeration cycle having a well-known configuration, and the interior is partitioned into a plurality of storage rooms (refrigeration room, freezing room, vegetable room, etc.) vertically, Constitute. At this time, a machine room in which a compressor and the like constituting the refrigeration cycle are provided in the lower part on the back side of the heat insulating box 1. At this time, the heat insulation box 1 has five wall portions, that is, right and left side wall portions, a ceiling wall portion, a back wall portion, and a bottom wall portion. In the present embodiment, FIG. As shown in the figure, each of these wall portions is composed of a wall surface unit 4 for the left side wall, the right side wall, the ceiling wall, the back wall, and the bottom wall, respectively.

  Hereinafter, when it is necessary to distinguish the five wall surface units 4, (A), (B), (C), (D), and (E) are respectively added after the symbol “4”. In addition, as shown also in FIG.4 (b), the bottom wall part (wall-wall unit 4 (E) for bottom walls) of those is diagonally upward from the part which comprises the front half part of the bottom of a refrigerator main body, and its rear part. It is comprised in the bending shape which has integrally and the inclined wall used as the wall of the front side of a machine room. The upper end side portion of the inclined wall is abutted with the lower end side portion of the wall unit 4 (D) for the back wall.

  Each of the wall surface units 4 (A) to (E) includes a vacuum heat insulating panel 7 between an inner box divided body 5 and an outer box divided body 6 as shown in part in FIGS. It is configured by pasting together. Among them, the inner box divided body 5 is configured in a shape in which the entire inner box 2 is divided into the five wall portions. In this case, each inner box divided body 5 is formed of a molded product molded from plastic into a thin plate shape. However, these inner box divided bodies 5 should be vacuum molded products instead of conventional injection molded products. Can do. Thereby, the thickness of the inner box 2 (inner box divided body 5) can be sufficiently reduced. The thickness dimension of the inner box divided body 5 is desirably 1.5 mm or less, and in this embodiment, for example, can be approximately 0.5 mm.

  The vacuum heat insulation panel 7 is also formed in a shape corresponding to each inner box divided body 5 (a shape slightly smaller than the inner box divided body 5). Similarly, the outer box divided body 6 is configured in a shape in which the entire outer box 3 is divided into the five wall portions. These inner box divided body 5, outer box divided body 6, and vacuum heat insulating panel 7 also need to be distinguished for each wall surface unit 4 (A) to (E), after (A), ( B), (C), (D), and (E) are respectively attached.

  FIG. 3 shows the configuration of the wall surface unit 4 (A) for the left wall as a representative of the wall surface unit 4. The wall surface unit 4 (A) is formed by bonding a plastic thin plate-shaped inner box divided body 5 (A) and a steel plate outer box divided body 6 (A) to both surfaces of the vacuum heat insulating panel 7 (A). Configured. At this time, the outer box division body 6 (A) has a substantially vertically long rectangular shape as a whole, but the inner box division body 5 (A) and the vacuum heat insulation panel 7 (A) are obliquely arranged in a portion corresponding to the machine room. The shape is notched.

  In addition, an L-shaped metal reinforcing member 8 called an angle is attached to a corner portion on the lower rear side of the outer box divided body 6 (A), that is, a portion constituting the machine room. Although not shown, the wall unit 4 (B) for the right side wall also has a symmetric configuration with the wall unit 4 (A) for the left side wall. Therefore, with respect to the machine room, there is no heat insulating material on the left and right side walls, and only the outer box 3 (outer box divided body 6) made of steel plate is provided.

  Further, FIG. 4 shows the configuration of the wall surface unit 4 (E) for the bottom wall. Again, the inner box divided body 5 (E) and the outer box divided body 6 are formed on both surfaces of the vacuum heat insulating panel 7 (E). (E) and are configured. In this case, the inner box divided body 5 (E) and the outer box divided body 6 (E) are bent in advance in the shape of a side face “f”. The vacuum insulation panel 7 (E) also corresponds to the inner box divided body 5 (E) and the outer box divided body 6 (E) by making a concave groove portion having a V-shaped cross section formed in the middle part into a crease. It is bent to the shape. In this case, a pressing jig (press device) (not shown) or the like is required to apply the pressing force during the bonding operation of the three parties, but the bonding operation is performed by applying pressure in the vertical direction in FIG. be able to.

  As for the wall unit 4 (D) for the back wall, as shown in FIG. 2, the inner box divided body 5 (D) and the outer box divided body 6 (D) are provided on both sides of the vacuum heat insulating panel 7 (D). It is composed by bonding. Although not shown, the ceiling wall surface unit 4 (C) also has a configuration substantially equivalent to that of each of the wall surface units 4. As shown in FIG. 1, the heat insulating box 1 is configured by combining five wall surface units 4 (A) to (E), and connecting these wall surface units 4 (A) to (E). The structure of the part (butting part) will be described later.

  Here, the configuration of the vacuum heat insulation panel 7 will be briefly described with reference to FIGS. 5 and 6. As shown in FIG. 5, the vacuum heat insulation panel 7 is configured by accommodating a mat-shaped core material 9 in a bag body 10 and sealing the interior of the bag body 10 while keeping the interior of the bag body 10 in a vacuum reduced pressure state. is there. The core material 9 is configured by solidifying a material having high heat insulation performance, for example, glass wool, which is a cotton-like material of thin glass fibers, into a mat shape (rectangular plate shape). The bag 10 is, for example, a film having a high gas barrier property obtained by laminating an aluminum foil and a synthetic resin film (or made of an aluminum vapor-deposited film), cut into a rectangular shape, joined together, and a peripheral portion excluding one short side (Three sides) are heat-sealed in a U-shape to form a bag shape in which the core material 9 is accommodated almost densely.

  In manufacturing the vacuum heat insulation panel 7, first, the core material 9 is inserted and accommodated from the opening (one short side) of the bag 10, and then the opening of the bag 10 is connected to the vacuum pump. Then, the inside is evacuated and decompressed. And the opening part of the bag body 10 is sealed with a heat seal, maintaining pressure reduction. However, in this state, as shown in FIGS. 5A and 6A, the four sides of the bag body 10 are provided with wide ear portions 10a as heat sealing margins that protrude from the core material 9 to the periphery. ing.

  Therefore, as shown in FIG. 6 (b), the long side ears 10a are folded back to the upper surface side, and then the short side ears are shown in FIGS. 5 (b) and 6 (c). Fold 10a to the top side. The vacuum insulation panel 7 is obtained by stopping these folded portions with an adhesive tape. In addition, the side (upper surface side in FIG. 5, FIG. 6) by which the ear | edge part 10a was turned back among the vacuum heat insulation panels 7 is arrange | positioned at the inner box 2 (inner box division body 5) side.

  In the present embodiment, when the heat insulating box 1 is configured by combining the five wall surface units 4 (A) to (E), the following assembly structure is employed. That is, FIG. 2 representatively shows the configuration (transverse section) of the connecting (butting) portion between the wall unit 4 (A) for the left side wall and the wall unit 4 (D) for the back wall. Here, the wall unit 4 (D) for the back wall is on one side, and the wall unit 4 (A) for the left wall is on the other side.

  First, in the wall unit 4 (A) for the left side wall, the outer box division body 6 (A) includes a front flange portion 11 bent at a right angle on the front side (left side in the drawing) and the inner box 2 side. The folded portion 11a is further provided integrally with the folded portion 11a which is further folded in a U shape from the front end of the front flange portion 11. On the other hand, the insertion portion 12 is integrally formed on the front side of the inner box divided body 5 (A) so as to be bent at a right angle, and the insertion portion 12 and the folded portion 11a have a cross section. They are coupled by a U-shaped connecting member 13. In addition, a rear flange portion 14 that is bent at a right angle is integrally provided at a rear end portion of the outer box division body 6 (A). The rear flange portion 14 is screwed at a plurality of locations with screws (not shown) so that the end portion (left side portion) of the outer box division 6 (D) of the wall unit 4 (D) for the back wall overlaps. Is done.

  In the inner box divided body 5 (A) of the wall unit 4 (A) for the left side wall, a side (end) on the side combined with another wall unit 4 (D), that is, a rear side (in the drawing) On the right side, an extension portion 15 that is bent at a right angle and extends toward the inner surface side of the outer box division 6 (A) is integrally provided. A tip of the extension portion 15 is further bent at a right angle, and an attachment portion 15a is provided that is close to the inner surface of the outer box divided body 6 (A) in parallel. Between this attachment part 15a and the inner surface of the outer box division body 6 (A), it has adhere | attached with the sealing material 16 which consists of soft tapes, for example.

  Moreover, the vacuum heat insulation panel 7 (A) accommodated between the inner box divided body 5 (A) and the outer box divided body 6 (A) has both front and rear end surfaces, the inner box divided body 5 (A) and It is provided in a form (form having a gap) separated from the outer box divided body 6 (A). Although not shown, an adhesive is applied to both sides of the vacuum heat insulation panel 7 (A), and the three of the inner box division body 5 (A), the vacuum heat insulation panel 7 (A), and the outer box division body 6 (A) Adhesion work is performed by applying a pressing force from both sides by a pressing jig (pressing device) in a superposed state.

  At this time, the adhesive is applied to a flat portion (not limited to all but may be at least a part) other than the folded ear portion 10a of the vacuum heat insulation panel 7 (A), and the vacuum heat insulation panel 7 (A ) Is bonded to the inner box divided body 5 (A) and the outer box divided body 6 (A) at the portions excluding the folded portion, particularly at the four corner portions. Further, the inner box divided body 5 (A) has a stepped portion (recessed portion) which is a storing means for storing the ear portion 10a at a position facing the folded ear portion 10a of the vacuum heat insulating panel 7 (A). 17 and 17 are formed. Although not shown, a soft member such as a soft tape that can be elastically deformed is disposed in the gap portion on the end face side of the vacuum heat insulating panel 7 (A).

  On the other hand, the wall unit 4 (D) for the back wall similarly adheres the vacuum heat insulation panel 7 (D) between the inner box divided body 5 (D) and the outer box divided body 6 (D). Configured. At this time, the inner box divided body 5 (D) has a protruding portion 18 that extends to the inner side (left side in the figure) while contacting the inner surface of the wall surface unit 4 (A), that is, the inner surface of the inner box divided body 5 (A). It is provided integrally. Further, a positioning portion 19 is provided on the inner surface of the wall surface unit 4 (A) (inner box divided body 5 (A)) in a protruding shape so that the tip of the protruding portion 18 contacts and is positioned.

  In this case, a heat insulating material 20 made of, for example, a molded product of polystyrene foam is accommodated inside the protruding portion 18. In addition, the projecting portion 18 extends toward the inner side of the box, and then extends toward the inner surface side of the outer box divided body 6 (D) along the inner surface of the inner box divided body 5 (A). It is bent, and it is set as the attaching part 18a which adjoins in parallel with the inner surface of the outer box division body 6 (D). The mounting portion 18a and the inner surface of the outer box divided body 6 (D) are bonded to each other by a sealing material 21 made of, for example, soft tape. In addition, although illustration is abbreviate | omitted, in order to improve airtightness, the rubber | gum packing etc. which are heat insulation means are provided in the space part S for escaping a screw formed in the outer side of the extension part 15. As shown in FIG.

  Next, the operation and effect of the heat insulation box 1 of the present embodiment will be described. As shown in FIG. 1, FIG. 3, etc., the inner box 2 which becomes a box shape as a whole is composed of a plurality of inner box divided bodies 5 divided for each wall portion, and each vacuum heat insulating panel 7 Each inner box divided body 5 was formed in a shape corresponding to each. Thereby, since each inner box division body 5 was made into a comparatively simple shape, unlike the case where a vacuum heat insulation panel is stuck on each of a plurality of sides of a box-shaped inner box, those inner boxes In attaching (adhering) the vacuum heat insulating panels 7 to the divided bodies 5, it is sufficient to press or attach them in one direction. As a result, complicated jigs and expensive equipment are not required, the bonding work can be simplified, and productivity can be improved.

  In particular, in this embodiment, the inner box divided bodies 5 (A) to (D) for the left side wall, the right side wall, the ceiling wall, and the back wall are all flat, so that the bonding work is easy. Become. Also, the remaining inner wall divided body 5 (E) for the bottom wall is configured as a plate having one portion bent at an obtuse angle as shown in FIG. Compared with the case where 4 (E) is divided into two flat plate portions, the configuration is simplified, and the bonding operation can be facilitated similarly.

  Moreover, in the present embodiment, the outer box 3 is also composed of a plurality of outer box divided bodies 6 divided for each wall portion corresponding to the inner box divided body 5, and the outer box divided body 6, the vacuum heat insulating panel 7. The heat insulation box 1 whole was comprised by combining the wall surface unit 4 comprised by bonding three persons of the inner box division body 5 together. Therefore, it becomes easier to carry out the assembly work, and the necessary equipment can be made smaller. In addition, when a defect occurs in a part of the heat insulation box 1, it is possible to replace only the corresponding wall surface unit 4, and the replacement work at the time of the defect is facilitated, and repair is performed at low cost. Can do.

  In the present embodiment, as shown in FIG. 2, the structure of each wall unit 4 is the side of the inner box divided body 5 that is combined with another wall unit 4, and the inner surface of the outer box divided body 6. Since the extending portion 15 extending in the direction is integrally provided, a positioning effect when the wall surface unit 4 is bonded can be obtained, and the space between the mounting portion 15a at the tip of the extending portion 15 and the inner surface of the outer box divided body 6 can be obtained. Since it is bonded by the sealing material 16, the effect of preventing the entry of outside air into the wall surface unit 4 can also be expected.

  Moreover, in the wall surface unit 4 of this embodiment, as shown in FIG. 2, since the end surface of the vacuum heat insulation panel 7 is provided in the form separated from the inner box division body 5 and the outer box division body 6, for example, Of the inner box 2 (inner box divided body 5), the portion constituting the freezer compartment is exposed to a low temperature of, for example, −20 ° C. Variations in dimensions can be absorbed, and excessive force can be prevented from acting on the vacuum heat insulation panel 7. In particular, in the vacuum heat insulation panel 7, there is a situation in which the corner portion of the end surface portion (the bent edge portion of the bag body 10) indicated by F in FIG. 6C is easily damaged (cut) by an impact or the like. However, it is also possible to prevent this portion from coming into contact (rubbing) with the inner box divided body 5 or the outer box divided body 6 and being damaged.

  The vacuum heat insulation panel 7 has an adhesive ear portion 10a around the bag body 10 at the periphery on the inner box divided body 5 side, and the folded portion has other irregularities. It is harder to bond than the part of, and there are circumstances that are easy to tear. In this embodiment, in order to adhere the vacuum heat insulating panel 7 to the inner box divided body 5 and the outer box divided body 6 at a portion excluding the folded portion, the ear portion 10a that is the folded portion is a stepped portion that is a storing means. Since it arrange | positions to 17, the troubles, such as a tear of the ear | edge part 10a, can be prevented, ensuring high adhesiveness.

  Furthermore, in the assembly (butting) structure of the wall surface units 4 in the present embodiment, as shown in FIG. 2, one wall surface unit 4 (inner box divided body) among the wall surface units 4 whose sides are butted together. 5) is provided with a protrusion 18 that extends inward of the wall while abutting against the inner surface of the other wall surface unit 4, so that it becomes difficult to create a gap between the wall surface units 4 during assembly, making it easy to obtain the perpendicularity of the unit. , Better thermal insulation. The mechanical strength as the heat insulation box 1 can also be increased. Since the positioning part 19 was provided in the inner surface of the other wall surface unit 4 at this time, assembly property can be improved more.

(2) Second and Third Embodiments FIG. 7 shows a second embodiment, which is different from the first embodiment in the following points. That is, although illustration as a whole is omitted, the left and right side walls and the ceiling wall of the heat insulating box constituted by bonding a plurality of vacuum heat insulating panels 7 between the inner box and the outer box are those It is comprised from the connection wall surface unit 31 of the form which connected the three parties integrally. In FIG. 7C, for convenience, the connection wall surface unit 31 is shown in a vertically inverted state (a state in which the ceiling wall is on the lower side).

  As shown in FIG. 7A and the like, the connecting wall surface unit 31 includes an outer box constituting plate 32 and an inner box divided for each wall (left wall, right wall, ceiling wall). The divided bodies 33 (A), (B), and (C) and the vacuum heat insulating panels 34 (A), (B), and (C) having shapes corresponding to the inner box divided bodies 33 are pasted together with an adhesive. It is configured. At the time of assembly, the outer box constituting plate 32 is formed into a horizontally long flat plate shape as a whole, and the vacuum heat insulating panels 34 (A), (B), (C) are bonded to the inner surface thereof, and each The inner box divided bodies 33 (A), (B), and (C) are bonded to the vacuum heat insulating panels 34 (A), (B), and (C), respectively (see FIG. 7B).

  In this case, each vacuum heat insulation panel 34 (A), (B), (C) and each inner box division body 33 (A), (B), (C) are predetermined on the upper surface in the figure of the outer box constituting plate 32. It is bonded to the position in a form with a gap between the wall portions (two places). In addition, when performing this bonding work, it is sufficient to apply a pressing force in one direction (vertical direction in the figure) with a jig (press device), eliminating the need for complicated jigs and expensive equipment. Can do. After bonding, the work of bending at right angles is performed at two positions between the wall portions of the outer box constituting plate 32, and the connecting wall surface unit 31 is configured as shown in FIG. Therefore, the second embodiment can also simplify the bonding operation and improve the productivity.

  FIG. 8 shows the third embodiment. The difference from the first embodiment is the shape of the wall surface unit 41 for the bottom wall. The wall unit 41 for the bottom wall includes a part that constitutes a bottom part (a part excluding the machine room) of the refrigerator body, a part that rises substantially vertically from the rear side part of the bottom part, and a part that constitutes the front wall part of the machine room, A portion that extends rearward substantially horizontally from the upper end of the front wall is integrally formed with a portion that forms the ceiling wall of the machine room. That is, when viewed from the side, it is formed in a shape that is folded twice at a right angle (so-called lightning shape).

  The wall surface unit 41 is also configured by adhering the vacuum heat insulation panel 44 between the inner box divided body 42 and the outer box divided body 43 with an adhesive. In this case, as shown in FIG. 8, these bonding operations are performed while applying a pressing force in one direction (vertical direction in the figure) by a jig (pressing device) in a form in which the whole is inclined at an angle of 45 degrees, for example. be able to. At this time, if the overall height dimension H is approximately 200 mm or less, it has been confirmed that bonding work by pressing in one direction is possible even if it has such a multiple-folded shape. Yes.

  Therefore, according to the third embodiment, complicated jigs and expensive equipment can be eliminated, the bonding work can be simplified, and productivity can be improved. The vacuum heat insulating panel 44 may be composed entirely of a single piece (having two bent portions), or divided into a plurality of pieces (in this case, three pieces) and divided into inner boxes. You may make it provide between the body 42 and the outer case division body 43. FIG. In any case, the bonding operation can be simplified and the productivity can be improved.

  In addition, it is not limited to each above-mentioned embodiment, It can change suitably in the range which does not deviate from a summary.

  In the drawings, 1 is a heat insulating box, 2 is an inner box, 3 is an outer box, 4, 41 is a wall surface unit, 5, 33, 42 are inner box divisions, 6, 43 are outer box divisions, 7, 34, 44 is a vacuum heat insulation panel, 9 is a core, 10 is a bag, 10a is an ear, 15 is an extension, 18 is a protrusion, 19 is a positioning part, 31 is a connecting wall surface unit, and 32 is an outer box component plate. .

Claims (8)

An inner box, an outer box, and a plurality of vacuum heat insulation panels provided between them, a heat insulation box body of a refrigerator constituting a plurality of wall portions of the refrigerator body,
The inner box is configured by combining a plurality of inner box divided bodies obtained by dividing the entire inner box,
The plurality of vacuum heat insulating panels are formed in shapes corresponding to the inner box divided bodies, respectively, and the vacuum heat insulating panels and the inner box divided bodies are respectively attached to the heat insulating boxes of the refrigerator body. The refrigerator main body includes at least four wall portions including left and right side wall portions, a ceiling wall portion, and a back wall portion,
The said inner box division body is provided in the form which divided | segmented the said inner box for every said wall part, The heat insulation box body of the refrigerator of Claim 1 characterized by the above-mentioned. The outer box also has a form in which the entire outer box is divided into a plurality of outer box divided bodies corresponding to the inner box,
The heat insulation of the refrigerator according to claim 1 or 2, wherein a plurality of wall surface units configured by bonding the outer box divided body, the vacuum heat insulating panel, and the inner box divided body are combined. Box.   In the wall surface unit, in the side portion combined with another wall surface unit, the inner box divided body is integrally provided with an extending portion extending toward the inner surface of the outer box divided body. The heat insulation box of the refrigerator according to claim 3.   5. The refrigerator heat insulation according to claim 3, wherein the wall surface unit has an end surface of the vacuum heat insulation panel separated from the inner box division body and the outer box division body. Box. The vacuum heat insulating panel is configured to house a core material in a bag body and fold back an adhesive ear portion that protrudes around the core material in the bag body,
The heat insulation for a refrigerator according to any one of claims 3 to 5, wherein the vacuum heat insulation panel is attached by being attached to the inner box division body and the outer box division body at four corner portions excluding the folded portion. Box.   The wall surface unit in which the side portions are abutted with each other, one wall surface unit is provided with a protruding portion extending inward of the warehouse while being in contact with the inner surface of the other wall surface unit. The heat insulation box of the refrigerator in any one of 6.   The heat insulation box for a refrigerator according to claim 7, wherein a positioning portion for positioning a tip of a protruding portion of the one wall surface unit is provided on an inner surface of the other wall surface unit.

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