JP2012082954A - Vacuum heat insulation material and refrigerator using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulation material which has a recess which accommodates a heat radiation pipe or the like while suppressing the deterioration of heat insulation performance, and to provide a refrigerator using the material.SOLUTION: In the vacuum heat insulation material 50f which has a core member 51 made of a fiber laminate, and an outer cover member which accommodates the core member 51 and whose interior is depressurized, the core member 51 has a first laminated body 51b, and a second laminated body 51c and third laminated body 51d which are arranged at a predetermined interval on the first laminated body 51b. The first laminated body 51b is deformed so as to fill the space between the second laminated body 51c and third laminated body 51d, and the recess 58a is formed on the side of the first laminated body 51b.

Description

  The present invention relates to a vacuum heat insulating material and a refrigerator using the same.

  As a background art in this technical field, there is JP-A-2008-64323 (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 panel that has been evacuated is pressed by an upper mold and a lower mold to form grooves and protrusions into which heat-dissipating pipes are 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 that has a core material of a fiber laminate and a jacket material that houses the core material, and the inside of the jacket material is depressurized, the core material includes the first laminate, A second laminated body and a third laminated body arranged at a predetermined interval on the first laminated body, wherein the first laminated body is formed of the second laminated body and the third laminated body. It deforms so as to fill the space, and a recess is formed on the first laminate side.

  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 which concerns on embodiment of this invention. The longitudinal cross-sectional view (AA sectional drawing of FIG. 1) of the refrigerator which concerns on embodiment of this invention. The schematic sectional drawing of the vacuum heat insulating material which concerns on embodiment of this invention. (A) is core material arrangement explanatory drawing of the vacuum heat insulating material of Example 1, (b) is the figure which looked at Drawing 4 (a) from arrow C, (c) is a schematic sectional view of the vacuum heat insulating material of Example 1. . (A) is core material explanatory drawing of the vacuum heat insulating material of Example 2, (b) is a schematic sectional drawing of the vacuum heat insulating material of Example 2. FIG. (A) is core material explanatory drawing of the vacuum heat insulating material of Example 3, (b) is a schematic sectional drawing of the vacuum heat insulating material of Example 3. FIG. Explanatory drawing of arrangement | positioning of the heat radiating pipe which concerns on Example 4, and a vacuum heat insulating material. (A) is core material explanatory drawing of the vacuum heat insulating material of Example 5, (b) is core material sectional drawing of Example 5 (DD sectional drawing of Fig.8 (a)), (c) is Example. FIG. 5 is a schematic cross-sectional view of the vacuum heat insulating material of FIG. 5, and FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 1 is a front view of a refrigerator according to the present embodiment, and FIG. 2 is a cross-sectional view taken along the line AA in FIG. Moreover, FIG. 3 shows the cross-sectional schematic of the vacuum heat insulating material of this embodiment.

  As shown in FIG. 2, the refrigerator 1 includes a refrigerator room 2, an ice making room 3 a, an upper freezer room 3 b, a lower freezer room 4, and a vegetable room 5 from the top. Each storage room includes a door that opens and closes the front opening. The refrigerating room 2 includes rotary refrigerating room doors 6 a and 6 b that rotate about the hinge 10. The doors other than the refrigerator doors 6a and 6b are drawer type doors, and an ice making door 7a, an upper freezer compartment door 7b, a lower freezer compartment door 8, and a vegetable compartment door 9 are arranged. When these drawer-type doors are pulled out, the storage container of each storage room is pulled out together with the door. In each door, a packing 11 for sealing with the refrigerator 1 and closing the opening is attached to the outer edge of each door on the storage chamber side.

  In addition, a heat insulating partition 12 is disposed to partition and insulate between the refrigerator compartment 2, the ice making chamber 3a, and the upper freezer compartment 3b. Moreover, between the lower freezer compartment 4 and the vegetable compartment 5, the heat insulation partition 14 for partition heat insulation is provided.

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

  Insulation partitions are basically installed in the partitions of rooms with different storage temperature zones such as refrigeration and freezing.

  In addition, about the arrangement | positioning of each store room, it does not specifically limit 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 may be other than the revolving door or the drawer door as long as they can be opened and closed. The number of door divisions is not particularly limited.

  The box 20 includes an outer box 21 and an inner box 22, and a heat insulating portion is provided in a space formed by the outer box 21 and the inner box 22, thereby insulating each storage chamber in the box 20 from the outside. is doing. A vacuum heat insulating material 50 (50a, 50b, 50c, 50d) is disposed in the space between the outer box 21 and the inner box 22, and a foam heat insulating material 23 such as rigid urethane foam is provided in a space other than the vacuum heat insulating material 50. Filled.

  In addition, in order to cool each storage chamber of the refrigerator 1 to a predetermined temperature, the refrigerator temperature chamber (the ice making chamber 3a, the upper freezer chamber 3b, the lower freezer chamber 4) is cooled in the cooler storage chamber 28a. A container 28 is provided. Moreover, the machine room 30a is provided behind the vegetable room 5, and the compressor 30 and the condenser 31 are arrange | positioned in the machine room 30a. The refrigeration cycle is configured by connecting the cooler 28, the compressor 30, the condenser 31, and a capillary tube (not shown) with refrigerant piping.

  Above the cooler 28, there is provided a blower 27 that circulates the cool air cooled by the cooler 28 into each storage chamber of the refrigerator 1 and maintains a predetermined temperature.

  Moreover, the heat insulation partitions 12 and 14 which thermally insulate the refrigerator compartment 2, the ice making room 3a, the upper freezer compartment 3b, the freezer compartment 4 and the vegetable compartment 5 of the refrigerator 1, respectively, are provided with a polystyrene foam 33 and a vacuum heat insulator 50c. In addition, it does not specifically limit to the foamed polystyrene 33, The foam heat insulating material 23 and vacuum heat insulating materials 50c, such as hard urethane foam, may be sufficient.

  Moreover, the recessed part 40 for accommodating electrical components 41, such as a board | substrate for controlling the driving | operation of the refrigerator 1, and a power supply board, is formed in the upper part wall 21a rear part of the box 20. As shown in FIG. Further, the recess 40 is provided with a cover 42 that covers the electrical component 41. The height of the cover 42 is arranged so as to be almost the same height as the upper surface wall 21a of the outer box 21 in consideration of appearance design and securing of the inner volume. Although it does not specifically limit, when the height of the cover 42 protrudes from the upper surface wall 21a of the outer box 21, it is desirable to keep in the range within 10 mm. Accordingly, the recess 40 is arranged in a state where only the space for storing the electrical component 41 is recessed on the foamed heat insulating material 23 side. Therefore, the inner volume is inevitably sacrificed by the heat insulation thickness. On the other hand, if the inner volume is increased, the heat insulation thickness between the recess 40 and the inner box 22 is reduced. Therefore, in the foam heat insulating material 23, a vacuum heat insulating material 50a bent in a substantially Z shape is disposed along the concave portion 40 of the upper surface wall 21a to secure and enhance the heat insulating performance. The cover 42 is made of a steel plate in consideration of heat resistance.

  Further, a compressor 30 and a condenser 31 that are components that generate large amounts of heat are disposed in the machine room 30a located below the back wall 21b of the box 20. Therefore, in order to prevent heat from entering the storage chamber, a vacuum heat insulating material 50d bent along the shape of the machine chamber 30a is disposed on the bottom wall 21d side.

  Moreover, the vacuum heat insulating material 50b is each arrange | positioned also to the back wall 21b and side wall (not shown) of the box 20, and the heat insulation performance is improved. Furthermore, if the vacuum heat insulating material 50e is arranged on each door together with the foam heat insulating material, the heat insulating performance is further improved.

  Next, the basic 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, 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 54.

  The jacket material 53 is arranged as an outline of the vacuum heat insulating material 50, and is configured in a bag shape in which a portion having a certain width is bonded by thermal welding from the ridgeline of the laminate film having the same size.

  As the core material 51, glass wool having an average fiber diameter of 4 μm was used as a laminate of flexible inorganic fibers not bonded or bound with a binder or the like. In addition, since outgas is reduced by using a laminated body of inorganic fiber materials for the core material 51, it is advantageous in terms of heat insulation performance, but is not particularly limited thereto. For example, inorganic fibers such as ceramic fibers, rock wool, and glass fibers other than glass wool 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 use conditions such as the heat-resistant temperature are satisfied. 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. There is no particular question if it is a conversion method.

  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, at least three layers of a surface protective layer, a gas barrier layer, and a heat welding layer are used. A laminate film having

  The surface protective layer is a resin film having a role of protecting the reduced pressure state from an external impact such as piercing.

  The gas barrier layer is formed by providing a metal vapor deposition layer on a resin film, and further providing a metal vapor deposition layer on a resin film having a high oxygen barrier property so as to face each other.

  A film having a low hygroscopic property is used for the heat-welding layer in the same manner as the surface protective layer.

  More specifically, the surface protective layer is a biaxially stretched film of polypropylene, polyamide, polyethylene terephthalate, or the like.

  The gas barrier layer is a biaxially stretched polyethylene terephthalate film with aluminum vapor deposition, a biaxially stretched ethylene vinyl alcohol copolymer resin film with aluminum vapor deposition, a biaxially stretched polyvinyl alcohol resin film with aluminum vapor deposition, or an aluminum foil.

  The heat welding layer is made of unstretched polyethylene or polypropylene.

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

  The surface protective layer has a function of protecting the gas barrier layer, but in order to increase 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.

  In addition, the resin barrier film other than the metal foil used for the gas barrier layer is significantly deteriorated in gas barrier properties due to moisture absorption. Therefore, by arranging a resin having low hygroscopicity for the heat-welded layer, it is possible to suppress the deterioration of gas barrier properties and to suppress the hygroscopic amount of the entire laminate film. Thereby, also in the vacuum evacuation process of the vacuum heat insulating material 50, since the moisture content which the jacket material 53 brings can be made small, vacuum exhaust efficiency improves significantly and heat insulation performance improves.

  In addition, the lamination (bonding) of each film is generally performed by a dry laminating method via a two-component curable urethane adhesive, but the type of adhesive and the bonding method are particularly limited to this. It may be based on other methods such as a wet laminating method and a thermal laminating method.

  In this 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. However, the material is not limited to these materials. As an example, the inner packaging material 52 may be a polypropylene film, a polyethylene terephthalate film, a polybutylene terephthalate film, etc., as long as it has low hygroscopicity and can be heat-welded and has little outgas. Thus, either physical adsorption or chemical reaction type adsorption may be used.

  Next, Example 1 of the present invention will be described with reference to FIG. FIG. 4 is a view for explaining a mechanism for forming a recess in the vacuum heat insulating material. 4A is a view showing a state in which a plurality of cut core materials are housed in the inner packaging material 52, and FIG. 4B is a view as seen from an arrow C in FIG. 4A. (C) is a schematic sectional drawing of the vacuum heat insulating material manufactured by vacuum forming.

  First, in FIGS. 4A and 4B, a laminated body of inorganic fibers prepared in advance in a roll shape is cut, and a plurality of core members 51a to 51d are stacked and arranged.

  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 52a (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 52a.

  The core material 51 accommodated in the inner packaging material 52a is compressed using a press machine, and then the inner packaging material 52a is decompressed. Then, the entire opening of the inner packaging material 52a is welded and sealed with a thermal welding machine so that the core material 51 accommodated in the inner packaging material 52a 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 state of being temporarily compressed is contained in the outer covering material 53a inside the inner packaging material 52a. Since the core material 51 is compressed, it can be smoothly inserted into the jacket material 53a without damaging the jacket material 53a. Thereafter, when part of the heat-sealing of the inner packaging material 52a is opened, the core material 51 is released from the compression and spreads outward in the outer jacket material 53a. In this state, the inside of the jacket material 53a and the inner packaging material 52a is decompressed, and the openings of the jacket material 53a and the inner packaging material 52a are welded and sealed, whereby the vacuum heat insulating material 50f is manufactured.

Thus, the recess 58a is formed in the thickness direction of the vacuum heat insulating material 50f through the compression-decompression-welding sealing step. About the structure, schematic sectional drawing of the vacuum heat insulating material 50f is shown in FIG.4 (c). In the decompression step, the jacket material 53 and the inner packaging material 52a 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 53a (and the inner covering member 52a). 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, a recess 58a is formed on the opposite side of the space 60a as shown in FIG.

  The recess 58a is formed as follows. In a state where the core material 51 is covered with the jacket material 53a and installed in the decompression chamber and the pressure is reduced, the pressure inside and outside the jacket material 53a 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 53a is welded and sealed, and the inside of the decompression chamber is returned to the atmospheric pressure, the thickness of the core material 51 is compressed by the pressure difference between the inside and the outside of the jacket material 53a. The

  When the entire 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 53a. 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 deformation of the core material 51a and the core material 51b that have entered the space 60a is restricted by the covering material 53a and the inner packaging material 52a, 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. As a result, a recess 58a is formed in the vacuum heat insulating material 50f on the opposite surface 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 hard to form a convex part in the back surface of a recess, and it can suppress that a jacket material is extended by a convex part and a crack etc. generate | occur | produce. Therefore, it becomes a vacuum heat insulating material which has a recessed part which accommodates a heat radiating pipe etc., suppressing the fall of heat insulation performance.

  Next, Example 2 will be described. In the first embodiment, as illustrated in FIG. 4, the facing surfaces of the core material 51 c and the core material 51 d are arranged substantially in parallel. In this case, the core material 51b is deformed so as to fill the space 60a, but cannot follow the deformation in a portion overlapping the core material 51c and the core material 51d, and two streaks 59 are formed on the opposite surface on which the recess 58a is formed. May occur. The streaks 59 may impair the reliability of the jacket material 53a.

  Therefore, in Example 2, as shown in FIG. 5, the core material 51g and the core material 51h of the outermost layer are arranged at a predetermined interval, and the opposing surfaces have inclined surfaces 51g1 and 51h1 of 20 to 70 °, respectively. . The core material 51g (second laminate) and the core material 51h (third laminate) are stacked on the core material 51f (first laminate) having a size straddling the core material 51g and the core material 51h. The core material 51f has a stacked structure in which the core material 51f is further stacked on the core material 51e (fourth stacked body) having the same size.

  FIG. 5A shows an example in which the opposing surfaces of the two core members 51g and 51h have inclined surfaces 51g1 and 51h1 having an angle of 50 °, respectively. The inclined surfaces 51g1 and 51h1 are inclined so that the core material 51f side is wider than the jacket material 53b side. In this configuration, the core material 51e and the core material 51f enter the space 60b so as to fill the space 60b between the core material 51g and the core material 51h. And the recessed part 58b is formed in the other side of the space 60b, ie, the core material 51e side. At this time, since the core material 51e and the core material 51f are deformed along the inclined surfaces 51g1 and 51h1, the portions overlapping the core material 51g and the core material 51h can easily follow the deformation that enters the space 60b.

  As a result, as shown in FIG. 5B, the core material 51g and the core material 51b on the side of the core material 51h are less likely to form streaks, so the reliability of the jacket material 53b is further improved.

  Further, if the faces facing each other are inclined surfaces of 20 to 70 °, the core material 51e and the core material 51f are easily deformed along a curved surface, and the recess 58b is appropriately formed.

  Next, Example 3 will be described. In the third embodiment, as shown in FIG. 6, two core members 51k and a core member 51l are arranged at a predetermined interval in the outermost layer, and have inclined surfaces 51k1 and 5111 on part of the facing surfaces. In this embodiment, the inclination is 35 °. Further, the portion outside the inclined surfaces 51k1 and 51l1 has opposing surfaces 51k2 and 51l2 facing each other substantially in parallel.

  As described above, the outermost layered laminate (core members 51k and 51l) has an inclined surface with an angle formed on a part thereof excluding a portion facing the outer surface, whereby the core material 51i and the core material 51j are formed of the core material 51k and the core material 51k. The space 60c is entered so as to fill the space 60c between the core members 51l. A recess 58c is formed on the opposite side of the space 60c.

  At this time, since the core material 51i and the core material 51j are deformed along the inclined surfaces 51k1 and 5111, the portions overlapping the core material 51k and the core material 51l can easily follow the deformation that enters the space 60c. Further, the outer surfaces of the core material 51k and the core material 51l are in contact with the opposing surfaces 51k2 and 5112, so that the core material 51i and the core material 51j are prevented from reaching the inner packaging material 52c.

  As a result, as shown in FIG. 6B, the core material 51k and the core material 51c on the side of the core material 51l are less likely to form streaks, thereby further improving the reliability of the jacket material 53c.

  Note that the manner of deformation of the core material at the time of depressurization also changes depending on the specifications of the core material used and the evacuation time during vacuum forming. For this reason, the opposing surfaces of the outermost layer stacks arranged at a predetermined interval may be cut into a curved surface in accordance with these conditions to generate the streaks 59 shown in FIG. Can be suppressed.

  Moreover, the width dimension of the recess formed in the vacuum heat insulating material can be controlled by adjusting the interval between the laminated bodies arranged facing the outermost layer. The depth dimension of the recess can be controlled by adjusting the angle of inclination of the opposing surfaces of the outermost layered laminate arranged at a predetermined interval.

  In addition, when two or more recesses are formed in the vacuum heat insulating material, it is only necessary to arrange three or more laminates with a predetermined interval in the outermost layer. In this case, the width and depth of the recess can be controlled by changing the arrangement interval and the inclination angle of the facing surface of the laminate.

  When three or more laminates are arranged at a predetermined interval, positioning for keeping the interval between the laminates and suppressing the formation of streaks on the jacket material when housed in the inner packaging material In addition, a protective member may be further arranged around the laminate.

  Next, Example 4 will be described. Example 4 demonstrates the example which has arrange | positioned the vacuum heat insulating material in which the recess was formed in the refrigerator. The vacuum heat insulating material used for the box 20 is attached to the inner box 22 or the outer box 21, and the foam heat insulating material 23 is filled and foamed between the inner box 22 and the outer box 21.

  In the present embodiment, the vacuum heat insulating material 50b disposed on the back wall 21b of the outer box 21 and the vacuum heat insulating material 50g disposed on the side wall 21e will be described.

  On the inner surface (back wall 21b, side wall 21e) of the outer box 21, a heat radiating pipe 90 through which the refrigerant flows is arranged. The heat radiating pipe 90 is affixed and fixed to the inner surface of the outer box 21 made of a steel plate with an aluminum tape 91 in order to improve the heat dissipation of the refrigerant.

  A recess having a depth of about 4 mm is formed in the vacuum heat insulating materials 50b and 50g, and a heat radiating pipe 90 having a diameter of about 4 mm can be disposed in the recess.

  In the present embodiment, as described in the first to third embodiments, the recess for fitting the heat radiating pipe is formed in the vacuum heat insulating material without performing the press molding process using the mold. Therefore, it is possible to provide a vacuum heat insulating material with improved reliability and a refrigerator using the same without reducing the heat insulating performance of the vacuum heat insulating material.

  Next, Example 5 will be described with reference to FIG. In this embodiment, as shown in FIGS. 8 (a) and 8 (d), a partial recess is formed in the central portion in order to prevent contact and spacing with the components arranged in the refrigerator. .

  As shown in FIG. 8A, the outermost core material 51p (second laminated body) is arranged with a predetermined space 60d. The core material 51p is overlaid on the core material 51n (first laminated body), and the core material 51n is overlaid on the core material 51m (third laminated body). That is, the core material 51n is disposed so as to straddle the space 60d of the outermost core material 51p.

  The core material 51p has inclined surfaces 51p1, 51p2, 51p3, and 51p4 in which the opposing surfaces of the space 60d are each at an angle of 50 °. In the present embodiment, the core material 51p of the outermost layer is cut into a polygonal shape, but this may be a circular shape or the like in accordance with the shape of the arranged component.

  In the decompression step, the inner packaging material 52d compresses the core materials 51m, 51n, 51p from the outside. Here, when the outermost core material 51m has a polygonal space 60d, the core material 51m and the core material 51n facing the space 60d are compressed from the outside and bent into the space 60d side. A recess 61 is formed in the vacuum heat insulating material 50i on the surface opposite to the space 60d.

  It should be noted that the core material may be cut into a curved shape according to how the core material follows during vacuum forming so that no streaks are generated on the opposite surface of the recess 61. Moreover, you may provide further the recessed part matched with the shape of the thermal radiation pipe 90 like Example 4. FIG.

  Thus, the vacuum heat insulating material 50i in which the recess 61 is formed is arrange | positioned in a refrigerator as shown in FIG.8 (d).

  For example, when the inner box 22 has a lighting component storage portion 62 that is convex toward the outer box side, the vacuum heat insulating material 50i and the lighting component storage portion 62 come into contact with each other if the thickness of the vacuum heat insulating material 50i is constant. For this reason, the thickness of the vacuum heat insulating material 50i must be reduced. However, if the thickness is reduced, the heat insulating performance is also deteriorated. Therefore, by forming the partial recess 61, the vacuum heat insulating material 50i can be thickened as a whole, and the thinned portion is only the minimum recess 61.

  In addition, when the space formed by the outer box 21 and the inner box 22 is filled with the foam heat insulating material 23 such as hard urethane foam, the distance between the lighting component storage portion 62 and the vacuum heat insulating material 50i is ensured, thereby making the urethane. The fluidity | liquidity fall of can be suppressed, and the fall of heat insulation performance can be suppressed.

  In addition, the illumination component storage part 62 may be provided on the side wall or the upper surface wall, and a recess may be formed in the vacuum heat insulating material corresponding to a known illumination arrangement structure.

  In the decompression step, a force is applied to the core material so as to compress it from the inner packaging material and the outer covering material.

  In this case, when the pressure reduction progresses and the frictional resistance between the core material and the inner packaging material and between the inner packaging material and the outer jacket material increases, sliding deformation between the core material, the inner packaging material, and the outer jacket material becomes difficult. Then, tensile or compressive stress is applied to the jacket material, and a crack may occur in a gas barrier layer such as a metal vapor deposition layer.

  Therefore, before the decompression process or immediately after the start of decompression, until the middle of decompression, before the frictional resistance between the core material, the inner packaging material and the jacket material increases, The forming position is partially extruded. Thereby, before the frictional resistance is increased, the covering material is positioned so as to slide in the vicinity of the recess, so that generation of cracks in the gas barrier layer can be suppressed.

  As described above, the present invention does not substantially require press molding with a mold, and can form a recess according to the purpose for securing the distance from the component. Moreover, without lowering the reliability of the vacuum heat insulating material, it is possible to form a recess while suppressing a decrease in heat insulating performance, and to provide a vacuum heat insulating material with improved productivity and a refrigerator using the same. it can.

DESCRIPTION OF SYMBOLS 1 Refrigerator 20 Box 21 Outer box 21a Top wall 21b Back wall 21d Bottom wall 21e Bottom wall 21e Side wall 22 Inner box 23 Foam insulation 50, 50a-50i Vacuum insulation 51 Core 51a, 51e, 51i Core (fourth lamination | stacking) body)
51b, 51f, 51j, 51n Core material (first laminate)
51c, 51g, 51k, 51p Core material (second laminate)
51d, 51h, 51l, 51m Core material (third laminate)
51g1, 51h1, 51k1, 51l1 Inclined surface 51k2, 51l2 Opposing surfaces 52, 52a to 52d Inner packaging material 53, 53a to 53d Outer material 54 Adsorbent 58, 58a to 58c, 61 Recess 59 Muscle 60, 60a to 60d Space 62 Lighting component storage 90 heat dissipation pipe

Claims (7)

In a vacuum heat insulating material having a core material of a fiber laminate, and a jacket material that houses the core material, and having reduced the pressure inside the jacket material,
The core has a first laminate, and a second laminate and a third laminate disposed on the first laminate at predetermined intervals,
The vacuum laminate is characterized in that the first laminate is deformed so as to fill a space between the second laminate and the third laminate, and a recess is formed on the first laminate side. . In a vacuum heat insulating material having a core material of a fiber laminate, and a jacket material that houses the core material, and having reduced the pressure inside the jacket material,
The core has a first laminate, and a second laminate and a third laminate disposed on the first laminate at predetermined intervals,
The opposing surfaces of the second laminate and the third laminate are wider on the first laminate side than on the jacket material side, and the first laminate is the second laminate and the third laminate. A vacuum heat insulating material which is deformed so as to fill a space of the laminated body, and has a recess formed on the first laminated body side.   The opposing surfaces of the second laminate and the third laminate have an inclined surface, the first laminate is deformed along the inclined surface, and the recess is formed. The vacuum heat insulating material according to claim 2.   The vacuum heat insulating material according to claim 3, wherein an angle of the inclined surface is 20 to 70 °. In a vacuum heat insulating material having a core material of a fiber laminate, and a jacket material that houses the core material, and having reduced the pressure inside the jacket material,
The core material has a first laminate and a second laminate disposed on the first laminate,
The second laminated body has a space in which the first laminated body side is wider than the outer cover material side, and the first laminated body is deformed so as to fill the space of the second laminated body. A vacuum heat insulating material, wherein a recess is formed on the first laminate side. 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 laminate, and a jacket material that houses the core material, and depressurizes the inside of the jacket material,
The core has a first laminate, and a second laminate and a third laminate disposed on the first laminate at predetermined intervals,
The opposing surfaces of the second laminate and the third laminate are wider on the first laminate side than on the jacket material side, and the first laminate is the second laminate and the third laminate. A refrigerator which is deformed so as to fill a space of the laminate, wherein a recess is formed on the first laminate, and the heat radiating pipe is disposed in the recess. In a refrigerator comprising a vacuum heat insulating material disposed outside an inner box, and a component storage unit disposed between the vacuum heat insulating material and the inner box,
The vacuum heat insulating material has a core material of a fiber laminate, and a jacket material that houses the core material, and depressurizes the inside of the jacket material,
The core material has a first laminate and a second laminate disposed on the first laminate,
The first laminated body is deformed so as to fill the space of the second laminated body, a recess is formed on the first laminated body side, and the component storage portion is disposed in the recess. Features a refrigerator.

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