JP2009257714A - Refrigerator and vacuum heat insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat insulating performance and to secure long-term reliability while increasing an installation area of a vacuum heat insulating material in a refrigerator. <P>SOLUTION: This refrigerator 1 is provided with a heat insulating housing 20 constituted by disposing a core material, and the vacuum heat insulating material 50 formed by receiving an adsorbent in a shell material and vacuumed inside into the three-dimensional shape along a plurality of faces of an outer case 21 or an inner case 22, in a space formed by the outer case 21 and the inner case 22, and by charging foam insulating material 23 therein. The shell material of the vacuum heat insulating material 50 is formed by a resin shell material injection-molded into the three-dimensional shape along the plurality of faces of the outer case 21 or the inner case 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

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

  In recent years, energy saving is strongly desired from the viewpoint of preventing global warming, and energy saving is an urgent issue for household appliances. In particular, in a refrigerator, a heat insulating box body having excellent heat insulating performance is required from the viewpoint of efficiently using heat.

  As a general heat insulation box of a refrigerator, a heat insulation box in which a foam heat insulating material such as polyurethane foam is filled between an outer box and an inner box is widely used. In order to increase the heat insulation capacity in such a heat insulation box, it is conceivable to increase the thickness of the foam heat insulating material. However, in the refrigerator, space saving and effective use of the space are strongly demanded, and the space where the foam heat insulating material can be filled. It was difficult to increase.

  Therefore, it has been proposed to use a vacuum heat insulating material, which is a high performance heat insulating material, and a foam heat insulating material in combination to form a heat insulating box. The vacuum heat insulating material used here houses the core material serving as a spacer in a jacket material having a gas barrier property, and the inside of the jacket material is evacuated and the peripheral portion of the jacket material is sealed. It is a heat insulating material.

  In recent vacuum heat insulating materials, in order to significantly reduce the thermal conductivity, it has become the mainstream to use an aggregate of inorganic fibers such as glass wool with an extremely fine fiber system. For example, there is a vacuum heat insulating material disclosed in JP-A-9-138058 (Patent Document 1). This vacuum heat insulating material is formed by laminating a core material formed by solidifying an inorganic fiber polymer such as glass wool with an organic binder, an adsorbent made of activated carbon or zeolite, and a metal foil layer covering the core material and the adsorbent. The laminate film is made by vacuuming the inside of the laminate film and sealing the edge of the laminate film.

  However, in the vacuum heat insulating material of Patent Document 1, it is considered that the degree of vacuum in the outer cover material decreases due to the gas generated from the organic binder, and the heat insulating performance of the vacuum heat insulating material deteriorates over time. .

  In response to this, a vacuum heat insulating material using an inorganic fiber aggregate without using a binder has also been proposed. For example, there exists a vacuum heat insulating material disclosed by Unexamined-Japanese-Patent No. 2006-112438 (patent document 2). The vacuum heat insulating material includes a core material with air circulation, an adsorbent that adsorbs moisture and gas components of the core material, an inner bag that stores the core material and the adsorbent, and an outer bag that stores the inner bag. It consists of and. Then, the adsorbent is filled in the cut portion provided on the surface of the core material, the inner bag is deaerated so that the adsorbent does not come out from the cut opening, and the inner bag and the core material are compressed and cut. The opening entrance is narrowed. As a result, it has become possible to provide a vacuum heat insulating material with excellent long-term reliability.

  On the other hand, as a method for producing a vacuum heat insulating material using a resin outer shell material, JP-A-5-331924 (Patent Document 3) can be cited. In this vacuum insulation material manufacturing method, a metal foil or a metal foil composite plastic is placed on the bottom surface of an in-mold injection molding mold having a concave cavity in advance, and a heat-smelted synthetic resin is injected into the mold. Perform in-mold molding, heat-bond metal foil or metal foil composite plastic film to the outer surface of the surface material, and then fill the recess in the surface material with a heat insulating material, then supply the back material covering the surface material, The outer peripheral edge of the back material is thermally bonded to the surface material under vacuum to be sealed.

  However, since the vacuum heat insulating material described above has a flat plate shape, there is a problem that the vacuum heat insulating material cannot be installed along a plurality of surfaces of the heat insulating box of the refrigerator, and the installation place is restricted. For this reason, the occupation area of a vacuum heat insulating material cannot be enlarged, and it became a factor which hinders the improvement of the heat insulation performance of a heat insulation box.

  Therefore, for example, a three-dimensional vacuum heat insulating material disclosed in JP 2001-336691 A (Patent Document 4) has been proposed. The vacuum heat insulating material is installed along a plurality of surfaces of the heat insulating box by forming a groove in the core of the vacuum heat insulating material in advance and bending the vacuum heat insulating material itself with the groove as a base to form a three-dimensional shape. To be able to.

Japanese Patent Laid-Open No. 9-138058 JP 2006-112438 A JP-A-5-331924 JP 2001-336691 A

  However, in the vacuum heat insulating material of Patent Document 4, the outer cover material film is stretched in the vicinity of the bent portion, and the metal layer or metal vapor deposition layer having a gas barrier effect is divided, and moisture or gas enters from the portion. Occurred, and there was a problem of lacking gas barrier properties. In addition, since the groove is formed in the vacuum heat insulating material, the thickness of the groove portion becomes extremely thin, and the core material becomes brittle in a vacuum environment. Therefore, there is a problem that the porosity is reduced and the thermal conductivity is deteriorated. It was.

  The objective of this invention is providing the refrigerator which can aim at the improvement of heat insulation performance and long-term reliability ensuring, and the vacuum heat insulating material used for this, increasing the installation area of a vacuum heat insulating material.

  In the first aspect of the present invention for achieving the above-mentioned object, a vacuum insulation in which a core material and an adsorbent are housed in a jacket material and the inside is evacuated in a space formed by the outer box and the inner box. In a refrigerator in which a material is installed in a three-dimensional shape along a plurality of surfaces of the outer box or the inner box, and a heat insulating box body is formed by filling a foam heat insulating material, the outer jacket material is the outer box or the inner box This is because it is formed by using a resin jacket material injection-molded into a three-dimensional shape along a plurality of surfaces.

A more preferable specific configuration example in the first aspect of the present invention is as follows.
(1) The resin jacket material is constituted by a sealed container in which rising peripheral edges of a plurality of injection-molded resin jacket materials are thermally welded to each other, and the core material and the adsorbent are stored in the sealed container. What you did.
(2) A plurality of reinforcing ribs are formed on the inner surface of the resin jacket material.
(3) The space occupancy rate of the reinforcing ribs of the resin jacket material is 40% or less.
(4) Reinforcing ribs protruding from both of the two resin jacket materials are formed, and the distance between the ribs of the two resin jacket materials facing each other is 30% or more of the thickness of the vacuum heat insulating material. What you did.

  Moreover, in the 2nd aspect of this invention, it installs in the three-dimensional shape along the several surface of the said outer box or the said inner box with a foam heat insulating material in the space formed by an outer box and an inner box, and a heat insulating box body A core material composed of an inorganic fiber aggregate, an adsorbent that adsorbs moisture, gas components, and the like, and a jacket material that contains the core material and the adsorbent and decompresses the inside The outer sheath material is formed using a resin outer sheath material that is injection molded into a three-dimensional shape along a plurality of surfaces of the outer box or the inner box.

  According to this invention, the refrigerator which can aim at the improvement of heat insulation performance and long-term reliability ensuring, and the vacuum heat insulating material used for this can be implement | achieved, increasing the installation area of a vacuum heat insulating material.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. The same reference numerals in the drawings of the respective embodiments indicate the same or equivalent.

(First embodiment)
The refrigerator of 1st Embodiment of this invention is demonstrated using FIG.1 and FIG.2.

  First, the whole structure of the refrigerator 1 of 1st Embodiment is demonstrated, referring FIG. FIG. 1 is a longitudinal sectional view of the refrigerator according to the first embodiment.

  The refrigerator 1 is equipped with the heat insulation box 20, the heat insulation doors 6-9, and the refrigerating cycle as main components. The heat insulation box 20 has a box shape with an open front, and has a refrigerator compartment 2, an ice storage compartment 3, a switching compartment, a freezer compartment 4, and a vegetable compartment 5 in this order from the top.

  The heat insulating doors 6 to 9 are doors that close the front opening portions of the respective chambers 2 to 5. A refrigerator compartment door 6, an ice storage compartment door 7, a switching compartment door, a freezer compartment door 8, and a vegetable compartment door 9 are arranged corresponding to each of the rooms 2-5. The refrigerating room door 6 is a double door that rotates around a hinge, and all the doors other than the refrigerating room door 6 are drawer type doors. When these drawer type doors 7 to 9 are pulled out, the containers constituting each chamber are pulled out together with the doors.

  The heat insulating box 20 includes a metal outer box 21 and a synthetic resin inner box 22, and a heat insulating portion is provided in a space formed by the outer box 21 and the inner box 22 to connect each storage chamber and the outside. Insulated. A heat insulating portion is configured by disposing the vacuum heat insulating material 50 along the inner side of the outer box 21 or the inner box 22 and filling a space other than the vacuum heat insulating material 50 with a foam heat insulating material 23 such as hard urethane foam. .

  The outer box 21 is formed in a box shape including a top surface, a bottom surface, both side surfaces, and a back surface by welding a folded steel plate or a flat steel plate. The inner box 22 is formed in a box shape including a top surface, a bottom surface, both side surfaces, and a back surface by molding a synthetic resin plate.

  A cooler 28 is provided on the back side of the freezer compartment 4 in order to cool each room such as the refrigerator compartment 2, the ice storage compartment 3, the switching room, the freezer compartment 4, and the vegetable compartment 5 to a predetermined temperature. The cooler 28, the compressor 30, the condenser 31, and a capillary tube (not shown) are connected to constitute a refrigeration cycle. 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.

  A machine room 15 is formed in the rear part of the bottom surface of the heat insulation box 20 over the entire width. A compressor 30 and a condenser 31 are disposed in the machine room 15. The compressor 30 and the condenser 31 are self-heating components that generate a large amount of heat. Therefore, in order to prevent heat from entering from the machine room 15 into the cabinet, a single three-dimensional vacuum heat insulating material 50 is disposed. The vacuum heat insulating material 50 is installed in a three-dimensional shape along a plurality of surfaces of the outer box 21. Specifically, the vacuum heat insulating material 50 is formed in an L shape along two surfaces of the outer box 21 forming the machine room 15. . Actually, a plurality of three-dimensional or flat-plate-shaped vacuum heat insulating materials are separately provided along other portions of the outer box 21 or the inner box 22, but they are omitted in FIG.

  Next, the vacuum heat insulating material 50 will be specifically described with reference to FIG. FIG. 2 is an enlarged cross-sectional view of the vacuum heat insulating material 50 of FIG.

  The vacuum heat insulating material 50 includes a core material 52 that serves as a spacer, an adsorbent 53 that adsorbs moisture, gas components, and the like, and a jacket material 51 that houses the core material 52 and the adsorbent 53 and evacuates the inside. It has. The core material 52 is made of an inorganic fiber aggregate such as glass wool having an extremely fine fiber system, and is configured without a binder. Therefore, the core material 52 has flexibility and flexibility, and can be bent and compressed. The adsorbent 53 is made of activated carbon, zeolite, or the like, and in the present embodiment, is composed of a molecular sieve 13x.

  The jacket material 51 includes two resin jacket materials 51a and 51b that are injection-molded into a three-dimensional shape along a plurality of surfaces at the installation location. The jacket material 51 of the first embodiment is injection-molded into a three-dimensional shape along the two surfaces of the outer box 21 constituting the machine room 15, but is injection-molded along other places of the outer box 21. Further, it may be injection molded into a three-dimensional shape along a plurality of surfaces of the inner box 22. When the number of parts may be increased, the jacket material 51 may be composed of three or more resin jacket materials. In addition, the mold used in the first embodiment is for three-dimensional molding along two surfaces. However, regardless of this shape, a mold capable of molding any three-dimensional shape can be used. it can.

  As described above, by using the jacket material 51 injection-molded into a three-dimensional shape along a plurality of surfaces of the installation location, the installation location of the vacuum heat insulating material 50 can be expanded and a large vacuum heat insulating material 50 can be used. . Thereby, the occupation area of the vacuum heat insulating material in the heat insulation box 20 can be enlarged, and the heat insulation performance of the heat insulation box 20 can be improved.

  The two resin jacket materials 51 a and 51 b are sealed containers in which the rising peripheral edge portions 56 are thermally welded to each other to form a welded portion 54. A core material 52 and an adsorbent 53 are accommodated in an envelope material 51 which is a sealed container. The core material 52 and the adsorbent 53 are stored in such a manner that the core material 51 containing the adsorbent 53 is attached to the inside of one resin jacket material 51a by being bent along the inner shape thereof, and then the other resin jacket. The material 51b is covered, and the rising peripheral edge portions 56 of the outer covering materials 51a and 51b are thermally welded in a predetermined vacuum state.

  The resin jacket materials 51a and 51b are formed with a plurality of reinforcing ribs 55 protruding from the inner surface. As a result, the resin jacket materials 51a and 51b can maintain strength sufficient to withstand the internal vacuum state. The mold used in this embodiment is for three-dimensional molding, and any three-dimensional shape can be molded regardless of the shape of FIG. At this time, the reinforcing ribs 55 are molded as shown in FIG. 2 so that the reinforcing ribs 55 are not brought into contact with each other. The reinforcing ribs 55 protruding from the inner surfaces of the resin jacket materials 51a and 51b are protruded so as to face each other with the same width and the same length.

  Next, referring to Table 1, the initial thermal conductivity and the temporal deterioration of the thermal conductivity of the vacuum heat insulating material 50 will be described in comparison with the conventional example.

表１の従来例の真空断熱材は、特許文献４の真空断熱材と同じ基本形状を有するものであり、ガスバリア性を有する金属層を有し、その他の樹脂層との多層ラミネートフィルムを用いて製袋された外被材１内に、無機繊維積層体からなる芯材２と、吸着剤３を挿入し、所定の真空度まで外被材１内を真空排気し、最終的に外被材１内の溶着層を熱溶着することで封止し作製したものである。外被材１は、内側に設けられた溶着用プラスチック層と外側に設けられた金属層や外部からの傷付きを防止する樹脂層等複数の層を有するラミネートフィルムで構成されている。外被材１の金属層はアルミ箔層で構成されている。吸着剤３は、合成ゼオライトであるモレキュラーシーブ１３ｘで構成されている。

The vacuum heat insulating material of the conventional example of Table 1 has the same basic shape as the vacuum heat insulating material of Patent Document 4, has a metal layer having gas barrier properties, and uses a multilayer laminate film with other resin layers. A core material 2 made of an inorganic fiber laminate and an adsorbent 3 are inserted into the envelope-formed jacket material 1, and the interior of the jacket material 1 is evacuated to a predetermined degree of vacuum, and finally the jacket material. 1 is formed by sealing the weld layer in 1 by heat welding. The jacket material 1 is composed of a laminate film having a plurality of layers such as a welding plastic layer provided on the inner side, a metal layer provided on the outer side, and a resin layer for preventing damage from the outside. The metal layer of the jacket material 1 is composed of an aluminum foil layer. The adsorbent 3 is composed of a molecular sieve 13x which is a synthetic zeolite.

  When the initial thermal conductivity of the vacuum heat insulating material of the conventional example and the vacuum heat insulating material 50 of the first embodiment was confirmed, as shown in Table 1, assuming that the initial heat conductivity of the vacuum heat insulating material of the conventional example is 100, It was found that the initial thermal conductivity of the vacuum heat insulating material 50 of one embodiment can be significantly improved to 75. The vacuum heat insulating material 50 according to the first embodiment is provided with the reinforcing ribs 55 on the resin jacket materials 51a and 51b, but is not in contact with each other. Therefore, there is no heat transfer between the reinforcing ribs 55, and the thermal conductivity is increased. It can be suppressed, and unlike the conventional example, it was considered that the increase in thermal conductivity could be suppressed because it was created by a reasonable molding method.

  Moreover, it checked about the time-dependent deterioration of the heat conductivity of the vacuum heat insulating material of a prior art example, and the vacuum heat insulating material 50 of 1st Embodiment. First, the initial thermal conductivity was measured at the time of producing the vacuum insulation material of the conventional example, and then left in a constant temperature bath maintained at 70 ° C. for a predetermined time (equivalent to standing for 10 years). When the conductivity was measured and the degree of deterioration was calculated, as shown in Table 1, it was a large increase of 175% compared to the initial thermal conductivity. Then, the initial thermal conductivity is measured when the vacuum heat insulating material 50 of the first embodiment is manufactured, and then left for a predetermined time (equivalent to being left for 10 years) in a thermostat maintained at 70 ° C. From the thermostat Taking out and measuring the thermal conductivity and calculating the degree of deterioration, as shown in Table 1, it was suppressed to an increase of 130% compared to the initial thermal conductivity, the deterioration of the deterioration with time compared to the conventional example It was found that significant improvement could be achieved.

  These are because the outer cover material 51 of the vacuum heat insulating material 50 of the first embodiment is made of resin injection molding, and the vacuum heat insulating material of the conventional example is compulsory together with the laminated film of the thin resin with a groove formed in the core material. This is because, by bending, the porosity of the inside decreased, the gas barrier layer in the film was broken, etc., and the deterioration of thermal conductivity and the lack of long-term reliability could be improved.

  Next, with reference to Table 2, the space occupancy rate of the reinforcing ribs 55 of the jacket material 51 of the first embodiment will be described in comparison with a conventional example. Table 2 shows the result of confirming the influence on the heat insulation performance (initial thermal conductivity) by the amount occupied by the reinforcing rib 55.

表２の従来例は、表１の従来例と同じものである。第１実施形態−１は補強リブ５５の空間占有率を３０％としたものであり、第１実施形態−２は補強リブ５５の空間占有率を４０％としたものである。ただし、第１実施形態−１と第１実施形態−２とは、補強リブ５５以外の外被材５１の形状や、芯材５２の種類、目付け量、使用重量、吸着剤５３の種類、使用重量、内部真空度を同じとしている。また、それぞれの初期熱伝導率相対値は、従来例による真空断熱材の初期熱伝導率を１００とした時の相対値である。

The conventional example in Table 2 is the same as the conventional example in Table 1. In the first embodiment-1, the space occupancy of the reinforcing rib 55 is 30%, and in the first embodiment-2, the space occupancy of the reinforcing rib 55 is 40%. However, in the first embodiment-1 and the first embodiment-2, the shape of the jacket material 51 other than the reinforcing rib 55, the type of the core material 52, the basis weight, the used weight, the type of the adsorbent 53, and the use Weight and internal vacuum are the same. Moreover, each initial heat conductivity relative value is a relative value when the initial heat conductivity of the vacuum heat insulating material by a prior art example is set to 100. FIG.

  It was found that the initial thermal conductivity when the space occupancy rate of the reinforcing ribs 55 of the first embodiment-1 is 30% can be greatly improved to 85 as a ratio with the initial thermal conductivity of the conventional example. Moreover, although the initial thermal conductivity when the space occupancy of the reinforcing rib 55 of the first embodiment-2 is 40% can be improved to 93 as a ratio to the initial thermal conductivity of the conventional example, the improvement width becomes small. ing. Accordingly, it has been found that the space occupancy rate of the reinforcing ribs 55 is preferably 40% or less in using the present invention.

  Next, the distance ratio between the ribs of the reinforcing rib 55 of the jacket material 51 of the first embodiment will be described in comparison with the conventional example with reference to Table 3. Table 3 shows the result of confirming the influence on the heat insulation performance (initial thermal conductivity) by the inter-rib distance ratio of the reinforcing rib 55. The inter-rib distance ratio of the reinforcing ribs 55 is the ratio of the distance dimension between the reinforcing ribs 5 to the thickness dimension of the vacuum heat insulating material 50.

表３の従来例は、表１及び表２の従来例と同じものである。第１実施形態−３は補強リブ５５の距離率を３０％としたものであり、第１実施形態−４は補強リブ５５の距離率を４０％としたものである。ただし、第１実施形態−３と第１実施形態−４とは、補強リブ５５以外の外被材５１の形状や、芯材５２の種類、目付け量、使用重量、吸着剤５３の種類、使用重量、内部真空度を同じとしている。また、それぞれの初期熱伝導率相対値は、従来例による真空断熱材の初期熱伝導率を１００とした時の相対値である。

The conventional examples in Table 3 are the same as the conventional examples in Tables 1 and 2. In the first embodiment-3, the distance ratio of the reinforcing rib 55 is 30%, and in the first embodiment-4, the distance ratio of the reinforcing rib 55 is 40%. However, in the first embodiment-3 and the first embodiment-4, the shape of the jacket material 51 other than the reinforcing rib 55, the type of the core material 52, the basis weight, the used weight, the type of the adsorbent 53, and the use Weight and internal vacuum are the same. Moreover, each initial heat conductivity relative value is a relative value when the initial heat conductivity of the vacuum heat insulating material by a prior art example is set to 100. FIG.

  It has been found that the initial thermal conductivity when the inter-rib distance ratio of the reinforcing rib 55 of the first embodiment-3 is 35% can be greatly improved to 84 as a ratio to the initial thermal conductivity of the conventional example. Moreover, although the initial thermal conductivity when the inter-rib distance ratio of the reinforcing rib 55 of the first embodiment-4 is 30% can be improved to 91 in proportion to the initial thermal conductivity of the conventional example, the improvement width is small. It has become. Therefore, it has been found that the distance ratio between the ribs of the reinforcing rib 55 is preferably 30% or more in using the present invention.

  The difference in the initial thermal conductivity between the conventional example and the first embodiment in Tables 2 and 3 is due to the difference in the thermal conductivity between the injection-molded resin jacket materials 51a and 51b and the core material 52 under vacuum. This is because the amount of heat transfer in the resin jacket materials 51a and 51b is relatively larger than the amount of heat of the core material 52 under vacuum. That is, when the area of the reinforcing rib 55 is increased, the occupied volume of the space having low thermal conductivity is reduced, and the resin portion having high thermal conductivity is increased, so that the movement of heat between the upper and lower sides is increased.

(Second Embodiment)
Next, the refrigerator of 2nd Embodiment of this invention is demonstrated using FIG. FIG. 3 is a cross-sectional view of a main part of the vacuum heat insulating material 50 of the refrigerator according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in the points described below, and the other points are basically the same as those in the first embodiment, and thus redundant description is omitted.

  In this second embodiment, not all of the reinforcing ribs 55 of the resin jacket materials 51a and 51b are installed vertically or symmetrically facing each other, but installed in different places, different shapes and lengths. Yes. According to the second embodiment, heat conduction through the reinforcing ribs 55 can be reduced as compared with the first embodiment.

It is a longitudinal cross-sectional view of the refrigerator of 1st Embodiment of this invention. It is an expanded sectional view of the vacuum heat insulating material of FIG. It is a longitudinal cross-sectional view of the refrigerator of 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Cold room, 3 ... Ice storage room, 4 ... Freezer room, 5 ... Vegetable room, 6 ... Cold room door, 7 ... Ice storage door, 8 ... Freezer room door, 9 ... Vegetable room door, 15 ... Machine room, 20 ... heat insulation box, 21 ... outer box, 22 ... inner box, 23 ... foam insulation, 27 ... blower, 28 ... cooler, 30 ... compressor, 31 ... condenser, 50 ... vacuum insulation, 51 ... jacket material, 52 ... core material, 53 ... adsorbent, 54 ... welded portion, 55 ... reinforcing rib, 56 ... rising edge.

Claims (6)

In a space formed by the outer box and the inner box, a three-dimensional shape along a plurality of surfaces of the outer box or the inner box is a vacuum heat insulating material in which the core material and the adsorbent are stored in the outer cover material and the inside is evacuated. In the refrigerator in which the heat insulation box is configured by filling with foam insulation,
The refrigerator is characterized in that the outer cover material is formed using a resin outer cover material that is injection-molded into a three-dimensional shape along a plurality of surfaces of the outer box or the inner box.   2. The resin jacket material according to claim 1, wherein the resin jacket material is formed of a sealed container in which rising peripheral edges of a plurality of injection-molded resin jacket materials are thermally welded to each other, and the core material and the adsorbent are contained in the sealed container. Refrigerator characterized by storing.   The refrigerator according to claim 2, wherein a plurality of reinforcing ribs are formed on the inner surface of the resin jacket material.   4. The refrigerator according to claim 3, wherein the space occupancy ratio of the reinforcing ribs of the resin jacket material is 40% or less.   In Claim 3, the reinforcing rib which protrudes from both of said two resin jacket materials is formed, and the distance between ribs where the reinforcing ribs of said two resin jacket materials face each other is 30% of the thickness of said vacuum heat insulating material. A refrigerator characterized by the above. It is installed in a three-dimensional shape along a plurality of surfaces of the outer box or the inner box together with the foam heat insulating material in the space formed by the outer box and the inner box, and constitutes a part of the heat insulating box.
In a vacuum heat insulating material comprising a core material composed of an inorganic fiber aggregate, an adsorbent that adsorbs moisture, gas components, and the like, and a jacket material that contains the core material and the adsorbent and decompresses the inside thereof,
A vacuum heat insulating material, wherein the outer jacket material is formed using a resin outer shell material that is injection-molded into a three-dimensional shape along a plurality of surfaces of the outer box or the inner box.

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