JP2012026493A - Vacuum heat insulating material, and refrigerator using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulating material which can maintain insulating performance for a long term by reducing loads of an outer case material and an inner bag, and to provide a refrigerator equipped with the same.SOLUTION: A vacuum insulating material consists of a core material formed of an inorganic fiber assembly, an adsorbent for adsorbing moisture or gas component, the inner bag for accommodating the core material and an outer bag for accommodating the inner bag, wherein the inner bag contains a positioning part of the core material, the core material is divided into a first core material and second core material to be positioned at the positioning part, respectively, and the inner bag is bent to overlap first and second core materials.

Description

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

  As background art of this technical field, there are JP-A-8-218992 (Patent Document 1) and JP-A-2007-155086 (Patent Document 2).

  Patent Document 1 has a structure in which two or more heat insulating layers, in which a heat insulating core material is sealed in a vacuum bag made of a gas barrier film, are integrally laminated in a thickness direction. It is described that it has.

  Patent Document 2 discloses a heat insulating box body in which a vacuum heat insulating material is disposed in a space formed by an inner box and an outer box, and the vacuum heat insulating material has a gas barrier outer surface where the heat-welded layers face each other. A plurality of plate-like core members are sealed under reduced pressure so that they are located in independent spaces between the workpieces, and the heat-welding layers facing each other are heat-welded so as to follow the shape of the core member, The joint where the said heat welding layers which oppose are heat-welded between the core material part by which the said core material is pressure-tightly sealed between the said jacket materials, and the said core material part adjacent to the said core material part. It is described that it has a part.

Japanese Patent Laid-Open No. 8-291892 JP 2007-155086 A

  However, in Patent Document 1, because of the structure in which two or more layers are integrally laminated in the thickness direction, the gas barrier film may be damaged. Further, in order to regenerate and commercialize the core material, it is necessary to disassemble each layer that is integrally laminated, so that the regeneration efficiency is poor.

  Moreover, in patent document 2, since the joint part heat-welded so that a core material shape may be met between core materials, the space where heat insulation performance is invalid is formed, and heat insulation performance is reduced as a whole.

  Then, an object of this invention is to provide the vacuum heat insulating material which can reduce the load of a jacket material and an inner bag, and can maintain heat insulation performance for a long period of time, and a refrigerator provided with the same.

  In order to solve the above problems, for example, the configuration described in the claims is adopted. The present application includes a plurality of means for solving the above-described problems. To give an example, a core material composed of a fiber assembly, an adsorbent that adsorbs moisture or a gas component, and the core material are stored. In a vacuum heat insulating material provided with a bag and an outer bag for accommodating the inner bag, the inner bag has a positioning portion for the core material, and the core material is a first core material and a second core material. The first core member and the second core member are overlapped by being divided and positioned by the positioning portion, and the inner bag is bent.

  ADVANTAGE OF THE INVENTION According to this invention, the vacuum heat insulating material which can reduce the load of a jacket material and an inner bag, and can maintain heat insulation performance for a long term, and a refrigerator provided with the same can be provided.

The front view of the refrigerator which concerns on the Example of this invention. AA sectional drawing of FIG. The BB cross-section principal part enlarged view of FIG. Explanatory drawing of the vacuum heat insulating material which concerns on Example 1 of this invention. Explanatory drawing of the manufacturing process of the vacuum heat insulating material which concerns on Example 1 of this invention, and the conventional vacuum heat insulating material. Explanatory drawing of the welding process of the inner bag which accommodated the core material which concerns on Example 1 of this invention. BB sectional drawing of FIG. 2 (Example 1). Explanatory drawing of the manufacturing process of the vacuum heat insulating material which concerns on Example 2 of this invention. The example of arrangement | positioning of the vacuum heat insulating material which concerns on Example 3 of this invention. Explanatory drawing of the manufacturing process of the vacuum heat insulating material which concerns on Example 4 of this invention. BB sectional drawing of Example 2 (Example 4). Explanatory drawing of the manufacturing process of the vacuum heat insulating material which concerns on Example 5 of this invention. BB sectional drawing of Example 2 (Example 5). Explanatory drawing of welding of inner bags which accommodated the core material which concerns on Example 6 of this invention, and an outer bag.

  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, FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG.

  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. 1 is a door that closes the front opening of each chamber, and the refrigerator compartment 2 is provided with refrigerator doors 6a and 6b that rotate around a hinge 10. FIG. The doors other than the refrigerator compartment doors 6a and 6b 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. When these drawer-type doors are pulled out, the containers in each room are pulled out together with the doors. Each door is provided with a packing 11 to be in close contact with the main body of the refrigerator 1 and is attached to the indoor peripheral edge of each door.

  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 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 between the outer box 21 and the inner box 22 and in the refrigerator compartment 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, A space other than the vacuum heat insulating material 50 is filled with a foam heat insulating material 23 such as rigid urethane foam.

  In addition, a refrigerator 28 is provided on the back side of the lower freezer compartment 4 in order to cool the refrigerator compartment 2, the ice making compartment 3a, the upper freezer compartment 3b, the lower freezer compartment 4, and the vegetable compartment 5 of the refrigerator 1 to a predetermined temperature. The refrigeration cycle is configured by connecting the cooler 28, the compressor 30, the condenser 31, the heat radiating pipe 32 and a capillary tube (not shown), and the heat radiating pipe 32 is fixed to the outer box 21 with an aluminum tape 35. is doing. 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.

  Moreover, partition heat insulation walls 12 and 14 are arranged as heat insulating materials for partitioning the refrigerator compartment 2, the ice making room 3 a, the upper freezer compartment 3 b, the freezer compartment 4 and the vegetable compartment 5 of the refrigerator 1, respectively. 50c. 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 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 this embodiment, the vacuum heat insulating material 50a is a single vacuum heat insulating material 50a formed in a substantially Z shape along the electric component 41. The cover 42 is made of a steel plate in consideration of heat resistance.

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

Example 1
Here, Example 1 of the present invention will be described with reference to FIGS.

  The vacuum heat insulating material 50 includes a core material 51 made of a laminate 54 of inorganic fibers, an inner bag 53 that houses the core material 51, and an outer bag 52 made of a metal foil laminate film having a plastic layer for heat welding. It is configured. The inner bag 53 is made of a synthetic resin film such as polyethylene film having a thickness of 20 μm. The reason why a film having a thickness of 20 μm is selected is that the film has a flexibility to adhere to a laminate of inorganic fibers when the inner bag 53 is depressurized. The inorganic fiber laminate 54 is made of natural fibers such as glass wool, glass fiber, alumina fiber, silica alumina fiber, or cotton.

  As shown in FIG. 6 to be described later, the core material 51 includes two or three layers of a plurality of core materials 51 obtained by cutting a laminated body 54 of inorganic fibers previously formed to a thickness of 100 mm to 150 mm into predetermined dimensions. Then, it is housed in the inner bag 53 (polyethylene synthetic resin film having a thickness of about 20 μm) as shown in FIG. Thereafter, the core material 51 is compressed by a press machine 55 as shown in FIG. Next, the inside of the inner bag 53 is depressurized, and the partial heat welding and the entire opening are heat-sealed and sealed so that the plurality of core members 51 housed in the inner bag 53 are not displaced by the heat welding machine 56.

  The core material 51 produced in this way is formed in the thickness shape of the vacuum heat insulating material 50 through a compression-decompression-welding sealing process. In addition, the core material 51 has a certain degree of flexibility, and is easy to attach to the attachment portion.

  More specifically, the core material 51 is in a state of raw cotton before the compression step or the decompression step, for example, 200 to 300 mm, but is compressed to a thickness of 8 to 15 mm and 20 to 25 times in the compression-decompression step. Is done. Accordingly, the raw cotton spreads in the outer circumferential direction so as to fill the gap in the inner bag 53 during compression.

  Next, the inner bag 53 with a wall thickness of around 20 μm is compressed into the core material 51 from the outer periphery in the decompression step. In other words, the inner bag 53 is thin enough to eliminate the formation of a tent-tensioned space, that is, thin enough to be flexible (easily deformed along the shape of the stored item).

  Here, the vacuum heat insulating material generally used conventionally is demonstrated using FIG.4 (b). Reference numeral 60 denotes a vacuum heat insulating material generally used in the past, and the difference from FIG. 4A is that the core material 51 housed in the inner bag 53 is not plural.

  In addition, the code | symbol 58 in Fig.4 (a) shows an adsorbent. As the adsorbent 58, for example, a molecular sieve 13x which is a synthetic zeolite is used. The adsorbent 58 adsorbs moisture or gas components that come out of the core material 51. That is, the core material 51 is sufficiently dried before being housed in the outer bag 52, but an adsorbent 58 is placed in order to completely remove gas and moisture.

  Further, since the adsorbent 58 is filled in the adsorbent storage portion 59 provided in the core material 51 before the inner bag is compressed, decompressed and welded, the inner bag 53 has the adsorbent 58 in the adsorbent storage portion 59. It also plays a role in preventing jumping out from inside.

  Next, the difference in the manufacturing process between the vacuum heat insulating material 50 and the conventional vacuum heat insulating material 60 will be described with reference to FIGS.

  First, in FIG. 5, the manufacturing process of the vacuum heat insulating material 60 will be described. In step 61, the roll-shaped raw cotton is cut into a predetermined dimension. Thereafter, in step 62, the raw cotton is put into a drying furnace (230 ° C.) and dried, and then a core material is formed from the plurality of raw cotton. The core material is stored in the inner bag, and temporarily compressed in a step 63 (compression-decompression-welding sealing), but this step opens the remaining one opening of the inner bag that has already been welded. This is a step intended to partially weld the inner bag in order to seal the entire inner bag and prevent the core material from shifting in the inner bag by welding. The inner bag storing the core material in this state can be temporarily stored.

  Next, in step 64, the inner bag storing the core material is stored in the outer bag. Thereafter, the inner bag is broken, and the inside of the outer bag is depressurized in step 65, the opening is sealed by welding, and vacuum packaging is performed. In step 66, the ear portion formed around the vacuum heat insulating material 50 is bent to one side (for example, the upper surface) side, and the ear portion is fixed. Finally, the vacuum heat insulating material 50 is completed by inspecting non-defective products and defective products (step 67) using a thermal conductivity checker or the like.

  In addition, since the manufacturing process of the conventional vacuum heat insulating material does not have a plurality of core materials stored in the inner bag, three sides are already welded, and the remaining one opening is welded.

  Here, the manufacturing process shown in FIG. 5 will be described with reference to FIG. In Fig.6 (a), raw cotton is cut | disconnected from the broken-line part of a predetermined dimension. And the core material cut | disconnected by FIG.6 (b) is stored in an inner bag, and the inner bag is welded by FIG.6 (c), and it is set as the inner bag which accommodated the core material.

  Specifically, FIG. 6 (a) is a raw material wound in a roll shape, and is cut at a broken line portion after drying, and FIG. 6 (b) is a core material composed of a plurality of raw cottons cut in FIG. 6 (a). It is folded and stored in the inner bag 53 formed in a bag shape by welding the three sides. As shown in FIG. 6 (c), the raw cotton 20 having a thickness of 8 to 15 mm is compressed by the press machine 55, for example, to about 1/25 in the thickness direction. Of course, an adsorbent (not shown) is put in the inner bag 53 at this time.

  Next, the inner bag 53 is depressurized, and the remaining one opening of the inner bag 53 on which the three sides have already been welded is welded, so that the entire inner bag is sealed and the core material is displaced within the inner bag. The partial welding for preventing this is performed by the heat welding machine 56. The inner bag 53 containing the core material 51 thus made can be stored in this state. Therefore, the inner bag 53 is very convenient for production adjustment. That is, the reduced pressure state is maintained during storage.

  In addition, although a present Example is a case where the inner bag 53 by which 3 sides were already welded is used, 2 sides may be sufficient and it does not specifically limit. Further, the length of the partial welding and the welding location for preventing the core material from shifting in the inner bag are not particularly limited, and the core material is welded before being stored in the inner bag. Also good.

  If the core material can be accommodated in the inner bag without shifting depending on the size of the core material, partial welding for preventing the shift may not be performed.

  Next, FIG. 7 shows a cross-sectional view when a vacuum heat insulating material 50 manufactured by housing three core members 51 in an inner bag is applied. The corner of the refrigerator has many irregularities because the rear plate 21b and the side plate 21e are fitted, and the heat radiating pipe 32 and the like are also arranged. Therefore, there was a part where it was difficult to install the vacuum heat insulating material, but by applying the vacuum heat insulating material 50j of the present embodiment, the interval between the first core material and the second core material was made larger than before. Can be shortened. Therefore, a vacuum heat insulating material with improved heat insulating performance can be arranged.

  As described above, in this embodiment, the vacuum heat insulating material includes a core material made of an inorganic fiber aggregate, an adsorbent that adsorbs moisture and gas components of the core material, an inner bag that stores the core material, The inner bag is composed of an outer bag, a plurality of core materials (divided into a first core material and a second core material) are stored in the inner bag, and the inside of the inner bag is compressed-depressurized-welded sealed. A thing is stored in an outer bag, and a positioning part for the core material is provided on the inner bag so that a plurality of core materials are not displaced, and then stored in the outer bag. As a result, the manufacturing process of pressure reduction and welding sealing after being stored in the outer bag can be performed only once, so that the degree of vacuum gradually decreases due to insufficient gas barrier performance or damage of the outer bag. Concerns can be minimized. In addition, the overall productivity and reliability of the vacuum heat insulating material can be maintained by minimizing the number of processes.

  Moreover, when manufacturing the vacuum heat insulating material which consists of a several core material, a several core material can be accommodated in an inner bag, and a positioning part can be provided so that it may not slip | deviate. Therefore, the space | interval of the divided | segmented 1st core material and 2nd core material can be shortened conventionally, and the vacuum heat insulating material which can improve heat insulation performance can be provided.

(Example 2)
Next, Example 2 of the present invention will be described with reference to FIG. In addition, about the same structure as Example 1, the description is abbreviate | omitted and a different point is demonstrated.

  FIG. 8A shows an inner bag 53 containing the core material 51a and the core material 51b. The inner bag 53 is bent on the surface of the inner bag 53 to provide a partial welded portion 65 to prevent misalignment. In this state, the inner bag 53 is accommodated in the outer bag 52, and the vacuum heat insulating material having a step as shown in FIG.

  As described in the text of the first embodiment, the inner bag 53 containing the core material 51 can be stored in this state. Further, since the core material 51 is partially welded to prevent the core material 51 from shifting in the inner bag 53, it can be changed into various shapes until it is housed in the outer bag 52, so that the intended vacuum heat insulating material can be obtained. Can be easily manufactured.

  As described above, in this embodiment, a plurality of core materials are accommodated in the inner bag, and after the inner bag is partially welded, before or after the inside of the inner bag is compressed-depressurized-welded sealed, Since it was designed to be partially welded, it was stored in an outer bag that was prevented from slipping when the inner bags were overlapped, and the pressure was reduced and the seal was sealed. Easy to manufacture.

(Example 3)
Next, Embodiment 3 of the present invention will be described with reference to FIG. In addition, about the same structure as Example 1 and Example 2, the description is abbreviate | omitted and a different point is demonstrated.

  In FIG. 9A, in order to make the vacuum heat insulating material 50 into a shape suitable for the application, a plurality of core materials 51 are accommodated in the inner bag 53, and are positioned by thermal welding so as not to be displaced, and manufactured in a curved shape. It is sectional drawing which has arrange | positioned the vacuum heat insulating material to the door 1a of the refrigerator.

  As described in the first embodiment, in the process of storing the plurality of core members 51 in the inner bag 53, partial unevenness of the parts constituting the door 1a can be avoided and molded into an intended shape. . Therefore, even in a situation where the application of the flat plate-like vacuum heat insulating material 50 is limited, the vacuum heat insulating material 50 having an enlarged wall area can be incorporated into the door 1a, and the heat insulating performance can be improved.

  Moreover, since it will be stressed to raw cotton to make flat-shaped vacuum heat insulating material 50 into a curved shape by a bending process, there exists a concern about the fall of heat insulation performance, but in this invention, stress is applied to raw cotton. It can be made into a curved shape, and the strength against twisting of the door 1a can be improved.

  9 (a) to 9 (d), in order to make the vacuum heat insulating material 50 into a shape suitable for the application, a plurality of core materials 51 are accommodated in the inner bag 53, and the core material 53 is displaced in the inner bag 53. It is sectional drawing of the multiple examples which have arrange | positioned the vacuum heat insulating material 50 manufactured by positioning by heat welding so that there may not be in the door 1a of the refrigerator.

Example 4
Next, a fourth embodiment of the present invention will be described with reference to FIGS. In addition, about the same structure as Example 1- Example 3, the description is abbreviate | omitted and a different point is demonstrated.

  In FIG. 10A, the core material 51c, the core material 51d, and the core material 51e are accommodated in the inner bag 53c, and are positioned by heat welding so as not to be displaced in the inner bag 53c. FIG. 10B shows a case where the core material 51f is accommodated in the inner bag 53f and is positioned by thermal welding so as not to be displaced in the inner bag 53f. FIG. 10C shows an inner bag 53c and an inner bag 53f that are further positioned by a partial welded portion 65. After the inner bag 53c and the inner bag 53f are stored in the outer bag 52, the inner bag 53c and the inner bag 53f are sealed in a reduced pressure and welded state. Thus, two concave portions are formed. This shape can avoid partial unevenness of the refrigerator parts, and the vacuum heat insulating material 50 suitable for the application can be manufactured.

  FIG. 11 is a cross-sectional view in which the vacuum heat insulating material 50 of FIG. The heat radiating pipe 32 is disposed in the recess of the vacuum heat insulating material 50. Thereby, it can prevent that the heat | fever of the thermal radiation pipe 32 penetrate | invades in a store | warehouse | chamber, and can improve thermal radiation efficiency.

  In addition, although the inner bag of a plurality of core materials is partially welded to prevent the deviation when the inner bags are overlapped, the manufacturing process is not particularly limited as long as there is no deviation.

(Example 5)
Next, a fifth embodiment of the present invention will be described with reference to FIGS. In addition, about the same structure as Example 1- Example 4, the description is abbreviate | omitted and a different point is demonstrated.

  FIG. 12A shows a case where a core material 51g and a core material 51h having different sizes and thicknesses are accommodated in the inner bag 53 and positioned by heat welding so as not to be displaced in the inner bag 53. FIG. In FIG. 12B, the inner bag 53 is folded and overlapped between the core material 51g and the core material 51h so as not to be displaced by the partial welded portion 65. By storing this in the outer bag 52 and sealing it under reduced pressure and welding, a vacuum heat insulating material 50 suitable for a convex use can be produced as shown in FIG. 12 (c).

  FIG. 13 is a cross-sectional view in which the vacuum heat insulating material 50 of FIG. The heat radiating pipe 32 is disposed in the recess of the vacuum heat insulating material 50. Thereby, it can prevent that the heat | fever of the thermal radiation pipe 32 penetrate | invades in a store | warehouse | chamber, and can improve thermal radiation efficiency.

(Example 6)
Next, Embodiment 6 of the present invention will be described with reference to FIG. In addition, about the same structure as Example 1- Example 5, the description is abbreviate | omitted and a different point is demonstrated.

  FIG. 14 (a) shows the inner bag 53j containing the core material 51j and the inner bag 53k containing the core material 51k arranged in parallel without being overlapped, and positioned so as not to be displaced by the partial welded portion 65a. This may be substituted for FIG.

  14B shows an inner bag 53j in which the core material 51j in FIG. 14A is stored and an inner bag 53k in which the core material 51k is stored are positioned so as not to be displaced by the partial welded portion 65a. FIG. The inner bag 53j and the inner bag 53k can be positioned by further providing a partial welded portion 65b by thermal welding with the outer bag 52, and the core material 51j and the core material 51k are depressurized and welded and sealed. Therefore, a vacuum heat insulating material having an intended shape can be manufactured.

  As described above, according to the present invention, a plurality of core materials are stored in an inner bag, and the inner bag is compressed, decompressed, welded and sealed, and stored in an outer bag made of a metal foil (or metal deposition) laminated film. In the vacuum heat insulating material that is manufactured by breaking the inner bag to reduce the pressure inside the outer bag and welding and sealing it, the inner bag is partially welded before or after the inner bag is compression-depressurized-welded sealed. That is, the inner bag has a core material positioning portion, the core material is divided into a first core material and a second core material, each positioned by the positioning portion, and the inner bag is bent to form the first core material. And the second core. This prevents the core material from shifting within the inner bag, and by changing the shape into various shapes until a plurality of core materials are combined and stored in the outer bag, a vacuum heat insulating material with the intended shape can be easily manufactured. .

  In addition, since the core material is stored in the inner bag and can be stored for each welded and sealed state, it is difficult for moisture and gas components from the outside to adhere to the core material, making it easy to store work in progress during the manufacturing process, The degree of freedom in the manufacturing work process is increased, and productivity can be improved.

  Further, since the inorganic fiber laminate is made of glass wool, glass fiber, alumina fiber, silica alumina fiber, etc., the inorganic fiber laminate can be reused and can contribute to environmental conservation. That is, the reliability of the ear welding is increased, the hermeticity maintenance is further improved, the inorganic fiber is not deteriorated due to gas intrusion or the like, and the reuse is promoted.

  In addition, since the manufacturing process for reducing pressure and welding and sealing after being stored in the outer bag is one time, the productivity is improved by reducing the number of processes, and the places where there is a concern about insufficient gas barrier properties or breakage are reduced. Therefore, the overall reliability can be improved.

  In addition, it is possible to minimize the concern of slow leaks in which the degree of vacuum gradually decreases due to insufficient gas barrier properties or breakage of the outer bag.

  In addition, when manufacturing a vacuum heat insulating material composed of a plurality of core materials, a plurality of core materials can be accommodated in an inner bag, and a positioning part can be provided so as not to be displaced. It can be made shorter than before and heat insulation performance can be improved. Also, by folding the inner bag between the core material and stacking it, or by storing a plurality of inner bags containing the core material in one outer bag, it is uneven, convex, concave, or A vacuum heat insulating material that can easily produce an intended shape such as a slope can be provided.

  Further, since the inner bag containing the core material can be stored in the outer bag and the positioning portion can be provided so that the inner bag and the outer bag are not displaced, a vacuum heat insulating material that can easily produce the intended shape can be provided.

32 Heat radiation pipe 35 Aluminum tape 50 Vacuum heat insulating material 51 Core material 52 Outer bag 53 Inner bag 54 Laminate 55 Press machine 56 Thermal welding machine 58 Adsorbents 65, 65a, 65b Partial welding part (positioning part)

Claims (3)

In a vacuum heat insulating material comprising a core material made of an inorganic fiber aggregate, an adsorbent that adsorbs moisture or gas components, an inner bag that stores the core material, and an outer bag that stores the inner bag,
The inner bag has a positioning portion for the core material, the core material is divided into a first core material and a second core material, positioned by the positioning portion, and the inner bag is bent to A vacuum heat insulating material, wherein one core material and the second core material are stacked.   The vacuum heat insulating material according to claim 1, wherein the inner bag storing the core material is stored in the outer bag. In the refrigerator provided with a foam heat insulating material and a vacuum heat insulating material between the outer box and the inner box,
The vacuum heat insulating material includes a core material made of an inorganic fiber aggregate, an adsorbent that adsorbs moisture or a gas component, an inner bag that stores the core material, and an outer bag that stores the inner bag,
The inner bag has a positioning portion for the core material, the core material is divided into a first core material and a second core material, positioned by the positioning portion, and the inner bag is bent to A refrigerator in which one core material and the second core material are stacked.

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