JP5372877B2 - Vacuum heat insulating material and refrigerator using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material suppressing degradation in heat insulation performance and including a recess for storing a heat radiation pipe or the like, and to provide a refrigerator using the vacuum heat insulating material. <P>SOLUTION: The vacuum heat insulating material includes a core material of fiber aggregate and a covering material for storing the core material, with the inside of the covering material being decompressed. The core material includes a first core material and a second core material being larger than the first core material, both materials being stacked together. The second core material is bent toward the first core material side to form a recess continuing along the periphery. <P>COPYRIGHT: (C)2012,JPO&amp;INPIT

Description

  The present invention relates to a vacuum heat insulating material and a refrigerator to which the vacuum heat insulating material is applied.

  As a background art in this technical field, there is JP 2008-64323 A (Patent Document 1). In this publication, “a heat insulating box body filled with a foam heat insulating material between an outer box and an inner box, a heat radiating pipe arranged on the inner surface side of the outer box, and a core material is covered with an outer packaging material to reduce the inside. And a vacuum heat insulating panel provided with a groove portion into which a heat radiating pipe is fitted, the vacuum heat insulating panel is formed on the back surface of the surface on which the groove portion is formed so as to face the groove portion and is perpendicular to the longitudinal direction than the groove portion. It is characterized by having a wide protrusion. "

JP 2008-64323 A

  In Patent Document 1, a vacuum-insulated vacuum heat-insulated panel is pressed by an upper mold and a lower mold to form a groove portion and a convex portion into which a heat radiating pipe is fitted. When forming a groove part and a convex part by press work, for example, when dust or the like adheres to the mold during press work, the vacuum heat insulating material may be damaged and leak. Moreover, a core material is cut | disconnected by press work and heat insulation performance falls.

  In addition, since the rear surface of the surface on which the groove portion is formed is opposed to the groove portion and has a convex portion that is wider in the longitudinal direction than the groove portion, the outer packaging material is greatly extended at the convex portion, and cracks and the like are generated. It occurs and reliability decreases.

  Then, an object of this invention is to provide the vacuum heat insulating material which has a recess which accommodates a heat radiating pipe etc., suppressing the fall of heat insulation performance, and a refrigerator using the same.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. As an example, in a vacuum heat insulating material having a core material of a fiber assembly and a jacket material that houses the core material, and the inside of the jacket material is decompressed, the core material includes the first core material, A second core material that is larger than the first core material is laminated, and the second core material is curved toward the first core material to form a continuous recess.

  ADVANTAGE OF THE INVENTION According to this invention, the vacuum heat insulating material which has a recess which accommodates a heat radiating pipe etc., suppressing the fall of heat insulation performance, and a refrigerator using this can be provided.

The front view of the refrigerator in the Example of this invention. AA sectional drawing of FIG. The schematic sectional drawing of the vacuum heat insulating material in the Example of this invention. (A) is core material arrangement | positioning explanatory drawing of a vacuum heat insulating material, (b) is the figure observed from the arrow C, (c) is a schematic sectional drawing of a vacuum heat insulating material. Explanatory drawing of the core material structure of the vacuum heat insulating material which shows Example 1 of this invention. The longitudinal cross-sectional view (BB sectional drawing of FIG. 5) of the vacuum heat insulating material which shows Example 1 of this invention. Explanatory drawing of the core material structure of the vacuum heat insulating material which shows Example 2 of this invention. Explanatory drawing of the installation state to the outer box of the vacuum heat insulating material which shows Example 2 of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a refrigerator showing the present embodiment, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  As shown in FIG. 2, the refrigerator 1 has a refrigerator room 2, an ice making room 3 a (upper freezer room 3 b), a lower freezer room 4, and a vegetable room 5 from the top. The code | symbol of FIG. 1 is a door which obstruct | occludes the front opening of each chamber, and the refrigerator compartment 2 is equipped with refrigerator door 6a, 6b rotated centering on hinge 10 grade | etc.,. Except for the refrigerator compartment doors 6a and 6b, they are drawer type doors, and an ice making compartment door 7a, an upper freezer compartment door 7b, a lower freezer compartment door 8, and a vegetable compartment door 9 are arranged respectively. When these pull-out doors are pulled out, the containers in each chamber are pulled out together. Each door is provided with a packing 11 to be in close contact with the refrigerator 1, and is attached to the indoor peripheral edge of each door.

  In addition, a partition heat insulation wall 12 is disposed in order to partition and insulate between the refrigerator compartment 2, the ice making chamber 3a, and the upper freezer compartment 3b. The partition heat insulating wall 12 is a heat insulating wall having a thickness of about 30 to 50 mm, and is composed of a single material or a combination of a plurality of heat insulating materials such as styrofoam, foam heat insulating material (hard urethane foam), vacuum heat insulating material, and the like. .

  Since the temperature zone is the same between the ice making chamber 3a and the upper freezing chamber 3b and the lower freezing chamber 4, a partition member 13 having a packing 11 receiving surface is provided instead of a partition heat insulating wall for partition heat insulation.

  A partition heat insulation wall 14 is provided between the lower freezer compartment 4 and the vegetable compartment 5 to insulate the partition. Like the partition heat insulation wall 12, it is a heat insulation wall of about 30 to 50 mm, and is made of styrofoam or foam insulation. (Rigid urethane foam), vacuum heat insulating material, etc.

  Basically, partition insulation walls are installed in the partitions of rooms with different storage temperature zones such as refrigeration and freezing. In addition, although the storage room of the refrigerator compartment 2, the ice-making room 3a, the upper stage freezer compartment 3b, the lower stage freezer compartment 4, and the vegetable compartment 5 is each dividedly formed in the box 20, the arrangement | positioning of each storage room is carried out. The invention is not particularly limited to this. Further, the refrigerator doors 6a and 6b, the ice making door 7a, the upper freezer compartment door 7b, the lower freezer compartment door 8, and the vegetable compartment door 9 are particularly limited in terms of opening and closing by rotation, opening and closing by drawers, and the number of divided doors. is not.

  The box 20 includes an outer box 21 and an inner box 22, and a heat insulating part is provided in a space formed by the outer box 21 and the inner box 22 to insulate each storage chamber in the box 20 from the outside. Yes. A vacuum heat insulating material 50 is disposed in a space between the outer box 21 and the inner box 22, and a space other than the vacuum heat insulating material 50 is filled with a foam heat insulating material 23 such as rigid urethane foam. The vacuum heat insulating material 50 will be described in detail with reference to FIG.

  Further, the ice making room 3a, the upper freezing room 3b, and the lower freezing room are used for cooling the refrigerator room 2, the ice making room 3a, the upper freezing room 3b, the lower freezing room 4, the vegetable room 5 and the like to a predetermined temperature. 4 is provided with a cooler 28. The refrigeration cycle is configured by connecting the cooler 28, the compressor 30, the condenser 30a, and a capillary tube (not shown). Above the cooler 28, a blower 27 that circulates the cool air cooled by the cooler 28 in the refrigerator and maintains a predetermined low temperature is disposed.

  In addition, a concave portion 40 for accommodating an electrical component 41 such as a substrate for controlling the operation of the refrigerator 1 or a power supply substrate is formed in the rear portion of the top surface of the box 20, and a cover 42 that covers the electrical component 41. Is provided. The height of the cover 42 is arranged so as to be substantially the same height as the top surface of the outer box 21 in consideration of appearance design and securing the internal volume. Although it does not specifically limit, when the height of the cover 42 protrudes from the top | upper surface of an outer box, it is desirable to keep in the range within 10 mm.

  Along with this, the recess 40 is disposed in a state where only the space for housing the electrical component 41 is recessed on the side of the foam heat insulating material 23, so that the internal volume is inevitably sacrificed in order to ensure the heat insulation thickness. If the internal volume is made larger, the thickness of the foam heat insulating material 23 between the recess 40 and the inner box 22 becomes thin. For this reason, the vacuum heat insulating material 50a is arrange | positioned in the foam heat insulating material 23 of the recessed part 40, and the heat insulation performance is ensured and strengthened. In the present embodiment, the vacuum heat insulating material 50a is a single vacuum heat insulating material 50a formed in a substantially Z shape so as to straddle the case 45a and the electrical component 41 of the interior lamp 45 described above. The cover 42 is made of a steel plate in consideration of heat resistance.

  In addition, since the compressor 30 and the condenser 31 arranged at the lower back of the box 20 are components that generate a large amount of heat, in order to prevent heat from entering the inside of the box, a vacuum insulation is provided on the projection surface toward the inner box 22 side. The material 50d is arranged.

  Next, the structure of the vacuum heat insulating material 50 will be described with reference to FIG. The vacuum heat insulating material 50 includes a core material 51, an inner packaging material 52 for holding the core material 51 in a compressed state, and an outer jacket material 53 having a gas barrier layer covering the core material 51 held in a compressed state by the inner packaging material 52. And an adsorbent.

  The jacket material 53 is disposed on both surfaces of the vacuum heat insulating material 50, and is configured in a bag shape in which a portion having a certain width is bonded to a ridge line of a laminate film of the same size by a welded portion 56 that is thermally welded. In the present embodiment, for the core material 51, glass wool having an average fiber diameter of 4 μm was used as a laminate of flexible inorganic fibers that are not bonded or bound with a binder or the like.

  The core material 51 is advantageous in terms of heat insulation performance because the outgas is reduced by using a laminate of inorganic fiber materials. However, the core material 51 is not limited to this. For example, ceramic fibers, rock wool, glass wool, etc. Other inorganic fibers such as glass fibers may be used.

  Depending on the type of the core material 51, the inner packaging material 52 may be unnecessary. Moreover, about the core material 51, an organic resin fiber material other than an inorganic fiber material can be used. In the case of organic resin fibers, there are no particular restrictions on use as long as the heat resistant temperature is cleared. Specifically, it is common to fiberize polystyrene, polyethylene terephthalate, polypropylene, etc. to a fiber diameter of about 1 to 30 μm by a melt blown method or a spun bond method, If it is a fiberization method, it will not ask in particular.

  The laminate structure of the jacket material 53 is not particularly limited as long as it has gas barrier properties and can be thermally welded. In the present embodiment, the surface protective layer, the gas barrier layer a, the gas barrier layer b, and the heat welded layer are used. The laminate film is composed of the following four layers, the surface layer is a resin film serving as a protective material, the gas barrier layer a is provided with a metal vapor deposition layer on the resin film, and the gas barrier layer b is metal vapor deposited on a resin film having a high oxygen barrier property. A layer is provided, and the gas barrier layer a and the gas barrier layer b are bonded so that the metal deposition layers face each other.

  For the heat-welded layer, a film having low hygroscopicity was used as in the surface layer. Specifically, the surface layer is a biaxially stretched film of polypropylene, polyamide, polyethylene terephthalate, the gas barrier layer a is a biaxially stretched polyethylene terephthalate film with aluminum vapor deposition, and the gas barrier layer b is biaxially stretched with aluminum vapor deposition An ethylene vinyl alcohol copolymer resin film, a biaxially stretched polyvinyl alcohol resin film with aluminum vapor deposition, or an aluminum foil was used, and the heat-welded layer was an unstretched polyethylene, polypropylene, or other film.

  The layer structure and material of the four-layer laminate film are not particularly limited to these. For example, as the gas barrier layers a and b, a metal foil or a resin-based film provided with a gas-barrier film made of an inorganic layered compound, a resin-based gas barrier coating material such as polyacrylic acid, DLC (diamond-like carbon), etc. For example, a polybutylene terephthalate film having a high oxygen barrier property may be used for the layer.

  The surface layer is a protective material for the gas barrier layer a. However, in order to improve the vacuum exhaust efficiency in the manufacturing process of the vacuum heat insulating material, it is preferable to dispose a resin having a low hygroscopic property. Moreover, since the resin-based film other than the metal foil normally used for the gas barrier layer b deteriorates the gas barrier property due to moisture absorption, it is possible to arrange the gas barrier property by arranging a resin having a low hygroscopic property for the heat-welded layer. This suppresses the moisture absorption of the entire laminate film.

  As a result, even in the vacuum evacuation process of the vacuum heat insulating material 50 described above, the amount of moisture brought into the jacket material 53 can be reduced, so that the vacuum evacuation efficiency is greatly improved, leading to higher performance of heat insulation performance. . In addition, the lamination (bonding) of each film is generally performed by a dry lamination method via a two-component curable urethane adhesive, but the type of adhesive and the bonding method are particularly limited to this. However, it may be any other method such as a wet laminating method or a thermal laminating method.

  Further, in the present embodiment, a polyethylene film that can be thermally welded is used for the encapsulating material 52, and a physical adsorption type synthetic zeolite is used for the adsorbent, but these are not limited to these materials. The inner packaging material 52 may be a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film or the like that has low hygroscopicity and can be heat-welded and has little outgas. The adsorbent adsorbs moisture and gas, and is physically adsorbed. Either chemical reaction type adsorption may be used.

  A first embodiment of the present invention will be described with reference to FIGS. 4 and 5.

  First, in FIG. 4, the laminated body of the inorganic fiber previously produced in roll shape is cut, and the several core materials 51a-51d are piled up and arrange | positioned.

  In this embodiment, a core material 51b (first laminated body) having the same thickness (about 100 mm) is laminated on a core material 51a (fourth laminated body) having a thickness of 100 mm. Furthermore, a core material 51c (second laminated body) and a core material 51d (third laminated body) having the same thickness (about 100 mm) are stacked on the core material 51b at a predetermined interval. In this embodiment, an interval of about 50 mm is provided between the core material 51c and the core material 51d, and there is a concave space 60a formed by the core material 51b, the core material 51c, and the core material 51d.

  In this state, the core materials 51a, 51b, 51c, 51d (hereinafter referred to as “core material 51” when referring to the entire core material) are stored in the inner packaging material 52 (polyethylene synthetic resin film having a thickness of about 20 μm). To do. At this time, in order to maintain a constant interval (space 60a), a jig may be used to store from the opening of the bag-shaped inner packaging material 52.

  The core material 51 accommodated in the inner packaging material 52 is compressed using a press machine, and then the inner packaging material 52 is decompressed. Then, the entire opening of the inner packaging material 52 is welded and sealed with a thermal welding machine so that the core material 51 accommodated in the inner packaging material 52 is not displaced, so that the core material 51 is temporarily compressed. In addition, the core material 51 can be temporarily stored in this state.

  Next, the core material 51 in a temporarily compressed state is accommodated in the envelope material 53 in the inner packaging material 52. Since the core material 51 is compressed, it can be smoothly inserted into the jacket material 53 without damaging the jacket material 53. Thereafter, when a part of the heat-sealing of the inner packaging material 52 is opened, the core material 51 is released from the compression and spreads outside in the outer jacket material 53. In this state, the inside of the outer covering material 53 and the inner packaging material 52 is decompressed, and the openings of the outer covering material 53 and the inner packaging material 52 are welded and sealed, whereby the vacuum heat insulating material 50 is manufactured.

  In this way, the recess 58a is formed in the thickness direction of the vacuum heat insulating material 50 through the compression-decompression-welding sealing step. About the structure, the schematic sectional drawing of the vacuum heat insulating material 50 is shown in FIG.4 (c). In the decompression step, the jacket material 53 and the inner packaging material 52 compress the core material 51 from the outside. At this time, in this embodiment, the core material 51a (fourth laminated body) and the core material 51b (first laminated body) are compressed from the outside, and the core material 51c (second laminated body) and the core material are compressed. It deform | transforms so that it may enter into the part between 51d (3rd laminated bodies).

  That is, the second laminated body (and the third laminated body) having an area smaller than that of the first laminated body (and the fourth laminated body) on the first laminated body (and the fourth laminated body). When the inner layers are stored in the jacket material and the inside is depressurized, the first stacked body (and the fourth stacked body) are compressed and deformed so as to fill the space 60a.

  At the time of decompression, the core member 51 is restricted from elastic deformation that tends to spread outward by the outer covering member 53 (and the inner covering member 52). And when pressure reduction progresses, the clearance gap which exists between the fibers of the core material 51 reduces gradually, and compresses and deforms from the outer side to the inner side.

  If the core material 51 is a laminated body having substantially the same thickness, the pressure is evenly applied by the reduced pressure, so that the formed vacuum heat insulating material has a flat plate shape.

  On the other hand, in the case of a laminate in which a space 60a exists between the core material 51c and the core material 51d, as shown in FIG. 4C, a recess 58a is formed on the opposite side of the space 60a.

  The recess 58a is formed as follows. In a state where the core material 51 is covered with the jacket material 53 and installed in a decompression chamber and the pressure is reduced, the pressure inside and outside the jacket material 53 is almost the same, so the thickness of the core material 51 does not change immediately. . After that, when the decompression is completed, the opening of the jacket material 53 is welded and sealed, and the inside of the decompression chamber is returned to the atmospheric pressure. The

  When the overall thickness of the core material 51 is reduced, the layers of the core material 51a and the core material 51b are drawn into the space 60a so as to fill the space 60a between the core material 51c and the core material 51d and the jacket material 53. The fiber is deformed into a curved shape.

  More specifically, first, the core material 51a and the core material 51b that are stacked so as to straddle the core material 51c and the core material 51d that are arranged at a predetermined interval are equally pressurized by decompression. Then, compression progresses so that the core material 51a and the core material 51b may fill the gap between the laminated fibers.

  Here, the portion overlapping the core material 51c and the core material 51d is restricted from being deformed, but the portion not overlapping the core material 51c and the core material 51d (below the space 60a) is in a state where no deformation is restricted. It is. Then, the core material 51a and the core material 51b enter the space 60a and fill the space 60a to achieve a stable vacuum state. That is, the core material 51a and the core material 51b that have entered the space 60a are restricted from being deformed by the jacket material 53 and the inner packaging material 52, and the internal gas gradually decreases, so that the core material 51a and the core material in the space 60a. The pressure reduction ends with 51b entering. Thereby, in the vacuum heat insulating material 50, the recessed part 58a is formed in the surface on the opposite side of the space 60a.

  According to the present embodiment, the core material is not cut by press working and the heat insulation performance is not deteriorated. Moreover, it is difficult to form a convex part on the back surface of the concave part, and it is possible to suppress the occurrence of a crack or the like due to the covering material being stretched by the convex part. Therefore, it becomes a vacuum heat insulating material which has a recessed part which accommodates a thermal radiation pipe etc., suppressing the fall of heat insulation performance.

  Next, FIG. 5 is a cross-sectional view of the vacuum heat insulating material 50 provided with a recess. The core material of the vacuum heat insulating material 50a overlaps the first core material 51e having a small size and the second core material 51f having a large size. Then, the first core material 51 e and the second core material 51 f are accommodated in the inner packaging material 52 and further inserted into the jacket material 53. The vacuum heat insulating material 50 is formed by performing vacuum packaging in this state.

  When the atmosphere in the vacuum packaging machine is released to an atmospheric pressure state after vacuum packaging, the inside of the vacuum heat insulating material 50 is in a negative pressure state, so that it is compressed and deformed by pressure from the outside. At this time, the second core member 51f is bent and deformed toward the first core member 51e so as to surround the outer periphery of the first core member 51e. Thereby, it becomes possible to provide the continuous recessed part 54 in the U shape around the 1st core material 51e. Moreover, since the recessed part 54 can be formed in the outer side of the vacuum heat insulating material 50a, it becomes possible to arrange | position the thermal radiation pipe 60 around the recessed part 54 at a U shape.

  Further, the second core material 51f having a large size has a slit 55 at a corner of the outer portion of the first core material 51e having a small size. This is because when the inside of the vacuum heat insulating material 50a is in a negative pressure state and the second core material 51f wraps the side surface of the first core material 51e by the pressure from the outside, a continuous recess 54 is formed. In the first core material 51e, it is possible to suppress the occurrence of unevenness and wavy unevenness in a portion that becomes the concave portion 54. That is, by providing the slit 55 or the notch in the second core material 51f located in the concave portion 54, the corner material near the corner 55 and wavy irregularities can be suppressed in the slit 55 portion.

  The slit 55 is preferably provided at a corner where the concave portion 54 overlaps two sides, that is, a bent portion. This is because when the second core material 51f having a large size wraps around the outer periphery of the first core material 51e having a small size at a corner where the concave portion 54 overlaps two sides, the core material is likely to be displaced.

  In FIG. 6, sectional drawing which affixed the vacuum heat insulating material 50a in a present Example on the inner surface of the outer box 21 of the refrigerator 1 is shown. A heat radiating pipe 60 is disposed in the recess 54 of the vacuum heat insulating material 50 a, and the heat radiating pipe 60 is attached to the outer box 21 made of iron plate with an aluminum tape 61. In addition, you may arrange | position the component of the refrigerator 1 in the recessed part 54 of the vacuum heat insulating material 50a.

  Next, Example 2 will be described with reference to FIGS. The vacuum heat insulating material 50b arrange | positions the 1st core material 51g of a small dimension on the 2nd core material 51h of a large dimension. Further, the third core material 51i is arranged around the first core material 51g with a predetermined interval.

  When vacuum packaging is performed in this state, the second core material 51h is deformed so as to enter between the first core material 51g and the third core material 51i. And the recessed part 54 which has the bending part 54a is formed in the vacuum heat insulating material 50b. Thereby, it becomes possible to arrange the heat radiating pipe 60 meandering in the U-shape in the recess 54 of the vacuum heat insulating material 50b. By disposing the heat radiating pipe 60 in the recess 54, the heat radiating efficiency can be further increased.

  In addition, the second core material 51h is provided with slits 55 at the corners of the portion located between the first core material 51g and the third core material 51i, that is, at the positions of the bent portions 54a. As a result, the deviation or unevenness of the core material caused by the compressive deformation is absorbed by the slit 55 portion, so that the concave portion 54 having the bent portion 54a can be appropriately formed.

  FIG. 8 shows a cross-sectional view in which the vacuum heat insulating material 50 b in this embodiment is attached to the inner surface of the outer box 21 of the refrigerator 1. The interval between the heat radiating pipes 60 is about 10 cm, and the heat radiating pipes 60 are positioned in the recesses 54 of the vacuum heat insulating material 50b. Thereby, the heat radiating pipe 60 can be arrange | positioned at the suitable space | interval which considered the heat radiation efficiency.

  In this embodiment, the concave portions 54 provided around the first core material 51g having a small size are arranged in a U-shape, but the shape of the attachment surface can be adjusted by appropriately adjusting the shape of the core material. It can be set as the recessed part shape according to. For example, it is possible to make a three-dimensional shape along the arrangement shape by making the concave portion 54 T-shaped, L-shaped or the like as the concave-convex shape along the shape of the inner box 22 of the refrigerator 1.

  As described above, by stacking and using core materials having different dimensions, it is possible to provide a recess around the core material having a small size and to have a shape that matches the unevenness of the heat radiating pipe or the refrigerator. In addition, the recess for housing the heat radiating pipe formed in the vacuum heat insulating material can be formed without cutting the inorganic fibers of the core material, and the deterioration of the gas barrier property of the jacket material is suppressed, and for a long time. The vacuum heat insulating material and refrigerator which can ensure heat insulation performance can be provided.

DESCRIPTION OF SYMBOLS 1 Refrigerator 20 Box 21 Outer box 22 Inner box 23 Foam heat insulating material 50, 50a, 50b Vacuum heat insulating material 51 Core material 51a Core material (fourth laminated body)
51b Core material (first laminate)
51c Core material (second laminate)
51d Core material (third laminate)
51e, 51g 1st core material 51f, 51h 2nd core material 51i 3rd core material 52 Inner material 53 Outer material 54, 58a Recessed part 55 Slit 60 Radiation pipe

Claims (5)

In a vacuum heat insulating material having a core material of a fiber assembly, and a jacket material that houses the core material, the inside of the jacket material being decompressed,
The core material is formed by laminating a first core material and a second core material larger than the first core material, and the second core material is curved to the first core material side to surround the core material. A vacuum heat insulating material characterized in that a concavity continuous to is formed.   The vacuum heat insulating material according to claim 1, wherein a slit is provided at a corner of the second core material. In a vacuum heat insulating material having a core material of a fiber assembly, and a jacket material that houses the core material, the inside of the jacket material being decompressed,
The core material is formed by laminating a first core material and a second core material larger than the first core material, and a third core material is spaced around the first core material. And place
The vacuum heat insulating material, wherein the second core material is bent so as to enter between the first core material and the third core material, and a concave portion having a bent portion is formed.   The vacuum heat insulating material according to claim 3, wherein a slit is provided in the second core member positioned at the bent portion. In a refrigerator comprising a vacuum heat insulating material disposed inside an outer box, and a heat radiating pipe disposed between the vacuum heat insulating material and the outer box,
The vacuum heat insulating material has a core material of a fiber assembly and a jacket material that stores the core material, and the inside of the jacket material is depressurized,
The core material is formed by laminating a first core material and a second core material larger than the first core material, and the second core material is curved to the first core material side to surround the core material. A refrigerator having a continuous recess formed therein, and the heat radiating pipe disposed in the recess.

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