JP2013053722A - Vacuum heat insulating material and heat insulating apparatus using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve ease of handling of a vacuum heat insulating material and prevent scratching to increase reliability as the vacuum heat insulating material.SOLUTION: The vacuum heat insulating material 50 includes: a core material of a polygonal shape including a square shape; and a film-like casing material of a polygonal shape including a square shape for covering the core material. An outer periphery 60, corer parts 61, and the whole of a surface 63 and a back surface 64 of the polygonal casing material are covered with urethane foam 62. Recess parts 65 in which heat radiating pipes used in a refrigeration cycle are inserted, are formed to a surface 63 or a back surface 64 of the urethane foam 62. The urethane foam is made by urethane-foaming using a foaming die. Depending on sizes of the foaming die, a thickness of the urethane foam can be changed.

Description

  The present invention relates to a vacuum heat insulating material and a heat insulating device using the same, and more particularly to a vacuum heat insulating material suitable as a heat insulating material for home appliances, homes, vehicles, and the like, and further, heat insulation that is a device to which the vacuum heat insulating material is applied. The present invention relates to containers, heat insulating boxes, electric water heaters, refrigerators, rice cookers, washing machines, computers, and the like.

  In recent years, in an atmosphere where the protection of the global environment has been greatly sought, energy saving for home appliances, homes, vehicles, etc. has become increasingly important. One solution is to improve the performance of heat insulating materials for the purpose of preventing unnecessary heat transfer. As an example of improving the performance of heat insulating materials, there is a vacuum heat insulating material that covers the core material with a porous structure with a jacket material made of an aluminum foil laminate film, and seals the inside under reduced pressure. It is applied to products and cooler boxes. For example, in a heat insulating wall composed of an outer box made of iron plate, an inner box made of ABS resin, and a foam heat insulating material filled in a space formed by the outer box and the inner box, the refrigerator is preliminarily vacuumed inside the heat insulating wall. It is applied by a method in which a heat insulating material is pasted and is made into an integral structure together with a foam heat insulating material.

  As a conventional vacuum heat insulating material applied to a refrigerator, a pair of edge portions opposed to each other in the width direction of two films are thermally welded together to form one cylindrical jacket material, There is a case in which a rectangular core material is inserted from the opening facing the length direction of the jacket material, the pressure between the jacket material and the core material is reduced, and then the jacket material opening is sealed by heat welding. . In this vacuum heat insulating material, the portion forming the heat-welded portion of the outer jacket material (the portion of the outer shell material that has been heat-welded from the core material) is bent to the surface side of the core material (bending including the heat-welded portion) In the space between the inner box and the outer box of the refrigerator. However, when the heat-welded part of the vacuum heat insulating material is bent to the surface side of the core material, a convex part is generally formed at the corner of the jacket material, and this convex part causes the handling risk of the operator and other vacuum heat insulating materials. The problem of damaging the jacket material of the material has arisen.

  In order to improve this problem, in Patent Document 1, four corners having a bent portion in a vacuum heat insulating material are covered with a hot melt adhesive (at the corner, two adjacent sides are bent with a time difference so that the bent portion is covered. By covering the cut with a hot melt adhesive), the outer dimensions of the vacuum heat insulating material can be reduced to improve the storage property, while handling hazards for workers and many The possibility of damaging the jacket material of another vacuum heat insulating material during storage of the vacuum heat insulating material is reduced.

JP 2005-106094 A

  However, since the corners of the jacket material are covered with a hot melt adhesive, contact with other vacuum heat insulating materials or storage shelves that are stored in layers causes the contact to adhere to the other side and improve workability. Since it may deteriorate, the vacuum insulation material cannot be stored repeatedly, and it must be stored so that it does not come in contact with storage shelves, etc., so there are problems in the storage method including the storage space. .

  Therefore, problems arise in storage of the vacuum insulation material, so hot melt adhesive is attached on the production line immediately before attaching the vacuum insulation material to the product. There is a possibility that it may not be able to obtain a sufficient effect due to the danger of handling the material or the outer cover material of other vacuum heat insulating materials.

  As described above, even if the corners of the jacket material are covered with the hot melt adhesive, workability is deteriorated due to the adhesiveness and storage problems occur, and sufficient effects cannot be obtained. .

  Therefore, the object of the present invention is to improve the handling property of the vacuum heat insulating material, to improve the reliability as a vacuum heat insulating material by eliminating the scratching property on the jacket material, and further to the vacuum heat insulating material when applied to a refrigerator. An object of the present invention is to provide a vacuum heat insulating material that expands the effective heat insulating area of the material and improves the heat insulating performance.

In order to solve the above problems, the present invention adopts the following configuration.
A vacuum heat insulating material comprising a polygonal core material including a quadrangle shape and a polygonal film-shaped envelope material including a quadrangle shape surrounding the core material, and an outer peripheral edge of the polygonal envelope material Is covered with urethane foam. Furthermore, a vacuum heat insulating material comprising a polygonal core material including a quadrangle shape and a polygonal film-shaped envelope material including a quadrangle shape surrounding the core material, wherein the polygonal envelope material The outer peripheral edge, corners, front and back surfaces are all covered with urethane foam.

  Moreover, in the said vacuum heat insulating material, the recessed part for letting the heat radiating pipe used by a refrigerating cycle pass is formed in the said surface or back surface of the said urethane foam. Furthermore, the urethane foam is urethane foamed using a foaming mold, and the thickness of the urethane foam is variable depending on the size of the foaming mold. Furthermore, the heat insulation apparatus by which the vacuum heat insulating material mentioned above was arrange | positioned in the space formed by an outer box and an inner box.

  ADVANTAGE OF THE INVENTION According to this invention, the reliability as a vacuum heat insulating material can be improved by improving the handleability of a vacuum heat insulating material and eliminating scratching property. Moreover, when applying a vacuum heat insulating material to the refrigerator which has an outer box and an inner box, an effective heat insulation area can be expanded and the heat insulation performance of a vacuum heat insulating material can be improved.

It is a front external view of the refrigerator which applied the vacuum heat insulating material which concerns on embodiment of this invention. It is side surface sectional drawing of the refrigerator to which the vacuum heat insulating material which concerns on this embodiment is applied, and is a cross-sectional arrow line view of the AA line of FIG. It is sectional drawing which shows the basic composition of the vacuum heat insulating material which concerns on this embodiment. It is a figure which shows the structure in the Example of the vacuum heat insulating material which concerns on this embodiment. It is a figure which shows the structure in the other Example of the vacuum heat insulating material which concerns on this embodiment. It is a figure explaining attachment to the refrigerator and arrangement | positioning in the other Example of the vacuum heat insulating material which concerns on this embodiment. It is sectional drawing which shows the typical structure of the vacuum heat insulating material regarding a prior art.

  The basic structure of the vacuum heat insulating material according to the embodiment of the present invention and the outline of the application field thereof will be described below with reference to FIGS. 1 is a front external view of a refrigerator to which a vacuum heat insulating material according to an embodiment of the present invention is applied, and FIG. 2 is a side sectional view of the refrigerator to which a vacuum heat insulating material according to the present embodiment is applied. FIG. 3 is a cross-sectional view taken along line -A, and FIG. 3 is a cross-sectional view illustrating a basic configuration of the vacuum heat insulating material according to the present embodiment.

  As shown in FIG. 2, the refrigerator 1 provided with the vacuum heat insulating material according to the present embodiment shown in FIG. 1 is, in order from the top, the refrigerator compartment 2, the ice making compartment 3a, the upper freezer compartment 3b, the lower freezer compartment 4, and the vegetable compartment. 5 Reference numerals 6 to 9 shown in FIG. 1 are doors that close the front openings of the respective chambers described above, and in order from the top, the refrigerator compartment doors 6a and 6b that rotate around the door hinges 10 and the like, and the ice making room doors. 7a, the upper freezer compartment door 7b, the lower freezer compartment door 8, and the vegetable compartment door 9 are shown. Except for the refrigerator compartment doors 6a and 6b, all are drawer-type doors. When these drawer-type doors 7 to 9 are pulled out, the containers constituting each chamber are drawn out together with the doors. Each door 6-9 is provided with a packing 11 for sealing the refrigerator main body 1, and is attached to the indoor side outer periphery of each door 6-9.

  Moreover, the partition heat insulation wall 12 is arrange | positioned in order to carry out the partition heat insulation between the refrigerator compartment 2, the ice-making room 3a, and the upper stage freezer compartment 3b. 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 compartment. Basically, partition heat insulation walls are installed in partitions of rooms with different storage temperature zones such as refrigeration and freezing.

  In addition, the storage compartment of the refrigerator compartment 2, the ice making compartment 3a and the upper freezer compartment 3b, the lower freezer compartment 4, and the vegetable compartment 5 is divided and formed in the box 20, respectively. 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 also particularly limited in terms of opening and closing by rotation, opening and closing by drawer, and the number of divided doors. It is not a thing.

  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 (50a, 50b, 50d) 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 hard urethane foam. .

  Moreover, partition heat insulation walls 12 and 14 are respectively arranged as heat insulating materials for partitioning the refrigerator refrigerating chamber 2, the ice making chamber 3a, the upper freezing chamber 3b, the freezing chamber 4 and the vegetable chamber 5, and the expanded polystyrene 33 and the vacuum heat insulating material 50c. It consists of The partition heat insulating walls 12 and 14 may be filled with a foam heat insulating material 23 such as rigid urethane foam, and are not particularly limited to the foamed polystyrene 33 and the vacuum heat insulating material 50c.

  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 set it 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 heat insulating material 23 side, so that the internal volume is inevitably sacrificed in order to ensure the heat insulating thickness. If the internal volume is increased, the thickness of the heat insulating material 23 between the recess 40 and the inner box 22 will be reduced. For this reason, the one heat insulating material 50a shape | molded in the substantially Z shape is arrange | positioned in the heat insulating material 23 of the recessed part 40, and the heat insulation performance is ensured and strengthened. Note that the cover 42 is made of a steel plate in consideration of a fire from the outside or a case where it is ignited for some reason.

  In addition, since the compressor 30 and the condenser 31 disposed at the lower back of the box body 20 are components that generate large amounts of heat, a vacuum heat insulating material 50d is disposed on the bottom plate 21d side in order to prevent heat from entering into the cabinet. ing.

  A refrigerator 28 is provided on the back side of the freezer compartment 4 in order to cool the refrigerator compartment 2, the freezer compartments (3a, 3b, 4), the vegetable compartment 5 and the like to a predetermined temperature. The cooler 28, the compressor 30, the condenser 31, and a capillary tube (not shown) are components of the refrigeration cycle. Above the cooler 28, a blower 27 that circulates cold air cooled by the cooler 28 in the refrigerator and maintains a predetermined low temperature is disposed.

  A heat radiating pipe 90 (see FIG. 6) including piping from the compressor 30 and the condenser 31 to the capillary tube is disposed along each inner surface of the outer box 21 such as the top plate 21a, the back plate 21b, and the side plate 21e. The heat of the heat radiating pipe 90 is released to the outside by using the top plate 21a, the back plate 21b, the side plate 21e and the like as heat radiating plates.

  Next, the structure of the vacuum heat insulating material 50 used for maintenance and reinforcement of the heat insulating performance of the refrigerator 1 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 (the inner packaging material 52 may be omitted), and a core material 51 held in a compressed state by the inner packaging material 52. And an adsorbent 54 having a gas barrier layer covering the surface. On one side of the vacuum heat insulating material 50, a groove portion 50m for arranging the heat radiating pipe 90 is provided.

  When the vacuum heat insulating material 50 is manufactured, two outer jacket materials 53 are prepared, and the inner film surfaces that can be heat-welded in the outer jacket material 53 are opposed to each other, and the core material 51 is included therebetween. To do. The core material 51 is formed in a rectangular and thin rectangular parallelepiped when viewed from the plane. The two jacket materials 53 have the same area and the same shape. The core material 51 is included, and a portion having a certain width is bonded from the side edge of the heat-welded film by heat-welding. The outer cover material including the heat-welded portion is bent at the four sides on the outer side to form a bent portion 55 to form a bag shape. 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 inorganic fibers not bonded or bound with a binder or the like.

  Outgassing is reduced by using a laminate of inorganic fiber material for the core material 51, which is advantageous in terms of heat insulation performance, but is not particularly limited thereto, for example, other than ceramic fiber, rock wool, glass wool, etc. 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 spunbond 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 1, the gas barrier layer 2, and the heat welded layer are used. The surface protective layer is a resin film having a role of a protective material, the gas barrier layer 1 is provided with a metal vapor deposition layer on the resin film, and the gas barrier layer 2 is formed on the resin film having a high oxygen barrier property. A vapor deposition layer is provided, and the gas barrier layer 1 and the gas barrier layer 2 are bonded so that the metal vapor deposition layers face each other. As the heat-welding layer, a film having low hygroscopicity was used as in the surface protective layer.

  Specifically, the surface protective layer is a biaxially stretched film of polypropylene, polyamide, polyethylene terephthalate, etc., the gas barrier layer 1 is a biaxially stretched polyethylene terephthalate film with aluminum vapor deposition, and the gas barrier layer 2 is biaxial with aluminum vapor deposition. A stretched 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 a film of unstretched polyethylene, polypropylene, or the like.

  The layer configuration and materials of the above-described four-layer laminate film are not particularly limited to these. For example, as the gas barrier layers 1 and 2, a metal foil or a resin film provided with a gas barrier film made of an inorganic layered compound, a resin gas barrier coating material such as polyacrylic acid, DLC (diamond-like carbon), or the like is thermally welded. For example, a polybutylene terephthalate film having a high oxygen barrier property may be used for the layer. The surface protective layer is a protective material for the gas barrier layer 1, but 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. Further, since the resin-based film other than the metal foil normally used for the gas barrier layer 2 deteriorates the gas barrier property by absorbing moisture, the gas barrier property can be obtained 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 through a two-component curable urethane adhesive, but the type of adhesive and the bonding method are particularly limited to this. It is not necessary to use any other method such as a wet laminating method or a thermal laminating method.

  Further, in the present embodiment, the encapsulating material 52 is a polyethylene film that can be thermally welded, and the adsorbent 54 is a physical adsorption type synthetic zeolite, 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 thermally welded and has little outgas, and the adsorbent 54 adsorbs moisture and gas. Either adsorption or chemical reaction type adsorption may be used.

"Example"
Next, an example of the vacuum heat insulating material according to the embodiment of the present invention will be described with reference to FIG. Before describing this embodiment, first, a conventional example disclosed in Patent Document 1 will be described as background art with reference to FIG. In the conventional example, the convex shape formed by the bent portions 55 formed at the four corners of the vacuum heat insulating material 50 as shown in FIG. 3 damages the handling risk of the operator and other vacuum heat insulating materials. In consideration of the fear, the configuration in which the corner portion 102 of the vacuum heat insulating material 101 is covered with the hot-melt adhesive 103 has been adopted. However, when storing the vacuum heat insulating material using the hot-melt adhesive 103, there is a problem that the workability deteriorates if it is in contact with other vacuum heat insulating materials or storage shelves that are stored in layers. It was.

  Therefore, in the example of the vacuum heat insulating material according to the embodiment of the present invention, a configuration intended to solve the above-described problems of the conventional example and further expand the effective heat insulating area of the vacuum heat insulating material is adopted. There will be described below with reference to FIG.

  4 (1) is a view showing a configuration in which four outer peripheral edges 60 of the vacuum heat insulating material 50 are covered with urethane foam, and FIG. 4 (2) is cut along a CC line shown in FIG. 4 (1). It is a figure which shows a cutting | disconnection end surface. In FIG. 4, 50 is a vacuum heat insulating material, 58 is a vacuum heat insulating material covered with urethane foam, 60 is an outer periphery of the vacuum heat insulating material, 61 is a corner of the vacuum heat insulating material, 62 is urethane foam, and 63 is a vacuum heat insulating material. The front surface 64 represents the back surface of the vacuum heat insulating material.

  As shown in FIGS. 3 and 4, the vacuum heat insulating material 50 has a thin flat plate shape having a front surface 63 and a back surface 64 (see the shapes of the vacuum heat insulating materials 50b and 50c shown in FIG. 2). Moreover, depending on the application site | part to a refrigerator, not only a flat plate shape but flat plate shape with a bending shape like 50a, 50d shown in FIG. 2 may be sufficient.

  The embodiment of the vacuum heat insulating material shown in FIG. 4 is not limited to the four corners 61 but by urethane foaming around the outer peripheral edge of the vacuum heat insulating material by using a foaming mold. The structure is covered with 62. At this time, by changing the shape and dimensions of the mold, the thickness covered by the urethane foam can be freely changed according to the location and part of the outer peripheral edge 60 and the corner 61. As shown in FIG. 4, the urethane foam 62 covers not only the four outer peripheral edges 60 of the vacuum heat insulating material 50 but also a part of the front surface 63 and the back surface 64 of the vacuum heat insulating material 50, so that the urethane foam 62 is in a vacuum state. There is no separation from the heat insulating material 50.

  In the above description, the vacuum heat insulating material 50 is a rectangular shape, but the present invention is not limited to this shape, and may naturally be applied to a polygonal vacuum heat insulating material including a pentagon or a hexagon. Further, the configuration example is not limited to a configuration in which all the outer peripheral edges and corners of the polygon are covered with urethane foam, but may be a configuration example in which some outer peripheral edges and corner portions are not covered with urethane foam.

  Next, another example of the vacuum heat insulating material according to the embodiment of the present invention will be described with reference to FIG. FIG. 5A shows a configuration in which the four outer peripheral edges 60, the front surface 63, and the back surface 64 of the vacuum heat insulating material 60 are covered with urethane foam 62, and the groove 65 for the heat radiating pipe 90 is formed in the urethane foam 62 along the box. FIG. 5 (2) is a cross-sectional view of the vacuum heat insulating material covered with the entire surface urethane foam shown in FIG. 5 (1). In FIG. 5, 50 is a vacuum heat insulating material, 58 is a vacuum heat insulating material covered with urethane foam, 60 is an outer peripheral edge of the vacuum heat insulating material, 61 is a corner of the vacuum heat insulating material, 62 is urethane foam, and 63 is a vacuum heat insulating material. The front surface 64 represents the back surface of the vacuum heat insulating material.

  In another embodiment shown in FIG. 5, since the entire surface of the vacuum heat insulating material 50 is covered with the urethane foam 62, the reliability regarding the heat insulating performance as the vacuum heat insulating material is further improved. The possibility of damaging the jacket material of the heat insulating material can be reduced. The entire surface of the vacuum heat insulating material 50 can be covered by foaming urethane using a foaming mold. The thickness of the urethane foam can be adjusted by changing the size of the foam mold.

  In addition, thin flat vacuum heat insulating materials were stacked and stored so that the thin shapes were stacked one above the other. However, since the entire surface is covered, the thin shapes should be stored vertically and vertically in a horizontal arrangement. Thus, even a small space can be used effectively as a storage space.

  Next, still another example of the vacuum heat insulating material according to the embodiment of the present invention will be described. Although not shown in the drawing, this embodiment has a structure in which the four corners of the vacuum heat insulating material are covered with spray type urethane foam as shown in FIG. Using this spray type, it is possible to reliably protect the corners in a short working time, and furthermore, handling hazards for workers handling vacuum insulation materials or damage to the outer cover material of other vacuum insulation materials Therefore, reliability can be improved. In this embodiment, each of the four corners includes the corner and the urethane foam covers part of the front and back surfaces of the vacuum heat insulating material, so that the urethane foam is less likely to be detached from the vacuum heat insulating material. Furthermore, since a gap is formed between the bent portions where adjacent sides of the jacket material are bent, separation of the urethane foam is further avoided by the spray type urethane foam entering the gap.

  Next, attachment to the refrigerator and arrangement in another example of the vacuum heat insulating material according to the present embodiment will be described below with reference to FIG. In FIG. 6, 21b is a refrigerator back plate, 21e is a refrigerator side plate, 23 is a heat insulating material, 50 is a heat insulating material, 50 is a vacuum heat insulating material, 62 is a urethane foam, 65 is a urethane foam groove, 66 is an outer box bending portion, and 90 is heat dissipation. A pipe 91 represents an aluminum tape.

  FIG. 6 (1) shows an arrangement structure in which the vacuum heat insulating material 50 is attached to the refrigerator side plate, and FIG. 6 (2) is a diagram showing the attachment procedure. In order to arrange the heat radiating pipe 90 on the inner surface side of the side plate 21 e of the outer box 21, the outer box 21 is fixed to the outer box 21 using, for example, an aluminum tape 91. Moreover, the outer box bending part 66 for arrange | positioning the inner box 22 is provided in the edge part of the side plate 21e. The urethane foam 62 is provided with a groove portion 65 for disposing the heat radiating pipe 90, thereby forming a groove (see the groove 50 m shown in FIG. 3) for disposing the heat radiating pipe 90 in the vacuum heat insulating material 50. Since it is not necessary, the heat insulation performance of the vacuum heat insulating material is improved.

  In FIG. 6 (2), the side plate 21 e of the outer box 21 is provided with an outer box bending portion 66 for arranging the inner box 22, but the side plate 21 e and the outer box bending portion 66 of the outer box 21 are provided. Is made of iron, and in order to arrange a conventional vacuum heat insulating material not covered with urethane foam, in order to prevent vacuum leakage due to contact between the vacuum heat insulating material and the outer box bending portion 66, Although it was necessary to provide a certain clearance (clearance) between the outer box bending portion 66 and the entire surface of the vacuum heat insulating material 50 was covered with urethane foam, the outer peripheral urethane foam was formed on the outer box bending portion 66. By placing the vacuum insulation 58 that is abutted and covered with urethane foam, the majority of the dimensions required for the clearance can be used for the expansion of the vacuum insulation, thus improving the insulation performance. When That.

  That is, when the clearance between the vacuum heat insulating material 50 that is not covered with urethane foam and the outer box bending portion 66 has conventionally been required, for example, 10 mm, the vacuum heat insulating material 58 covered with urethane foam is shown in FIG. Since the urethane foam may be directly contacted to the outer box bending portion 66 when it is attached to (there is no possibility of contact of the vacuum heat insulating material 50 itself), if the thickness of the urethane foam is 3 mm, the vacuum heat insulating material As such, the vacuum heat insulating material can be enlarged by 7 mm at the left end of FIG. 6 compared to the conventional example at the left end of FIG. 6, and the effective heat insulating area of the vacuum heat insulating material 50 can be expanded. be able to. The same applies to the right end of FIG. Thus, the effective heat cross-sectional area of a vacuum heat insulating material can be expanded by changing the thickness of urethane foam.

  As described above, in the embodiment of the present invention, at least the outer peripheral edge of the vacuum heat insulating material 50 is covered with urethane foam, thereby improving the handling and reliability of the vacuum heat insulating material and further expanding the effective heat insulating area. And heat insulation performance can be improved. The present invention is not limited to the above-described embodiments, and various modifications are included within the scope of the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Refrigeration room, 3a ... Ice making room, 3b ... Upper stage freezing room, 4 ... Lower stage freezing room, 5 ... Vegetable room, 6a ... Refrigeration room door, 6b ... Refrigeration room door, 7a ... Ice making room door, 7b ... upper freezer compartment door, 8 ... lower freezer compartment door, 9 ... vegetable compartment door, 10 ... door hinge, 11 ... packing, 12, 14 ... partition insulation wall, 13 ... partition member,
DESCRIPTION OF SYMBOLS 20 ... Box body, 21 ... Outer box, 21a ... Top plate, 21b ... Back plate, 21d ... Bottom plate, 21e ... Side plate, 21f ... Front surface, 22 ... Inner box, 23 ... Heat insulation material, 27 ... Blower, 28 ... Cooling 30 ... Compressor, 31 ... Condenser, 33 ... Polystyrene, 40 ... Recess, 41 ... Electrical component, 42 ... Cover,
50, 50a-50d ... Vacuum heat insulating material, 50m ... Vacuum heat insulating material groove part, 51 ... Core material, 52 ... Inner packaging material, 53 ... Coating material, 54 ... Adsorbent, 55 ... Bent part, 58 ... Cover with urethane foam 60 ... outer peripheral edge, 61 ... corner, 62 ... urethane foam, 63 ... front surface, 64 ... back surface, 65 ... urethane foam groove, 66 ... outer box bent portion, 90 ... heat radiating pipe, 91 ... aluminum tape DESCRIPTION OF SYMBOLS 101 ... Vacuum heat insulating material 102 ... Corner | angular part 103 ... Hot-melt-type adhesive agent

Claims (5)

A vacuum heat insulating material comprising a polygonal core material including a quadrangular shape, and a polygonal film-shaped envelope material including a quadrangular shape surrounding the core material,
A vacuum heat insulating material, wherein an outer peripheral edge of the polygonal outer covering material is covered with urethane foam. A vacuum heat insulating material comprising a polygonal core material including a quadrangular shape, and a polygonal film-shaped envelope material including a quadrangular shape surrounding the core material,
A vacuum heat insulating material, characterized in that the outer peripheral edge, corners, front and back surfaces of the polygonal outer cover material are entirely covered with urethane foam. In claim 2,
The vacuum heat insulating material characterized by forming the recessed part for letting the heat radiating pipe used by a refrigerating cycle pass in the said surface or the back surface of the said urethane foam. In claim 1, 2 or 3,
The urethane foam is urethane foamed using a foaming mold, and the thickness of the urethane foam is variable depending on the size of the foaming mold.   The heat insulation apparatus with which the vacuum heat insulating material as described in any one of Claims 1 thru | or 4 was arrange | positioned in the space formed of an outer box and an inner box.