JP2007056974A - Vacuum heat insulating material and refrigerator using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a high performance vacuum heat insulating material which compatibly attains a bending property and shape retaining property and heat insulating performance. <P>SOLUTION: A core material 13 has a netted or fibriform deformation retaining member 33 of an organic material held in a glass wool containing no binder and having an average fiber diameter of 3-5 μm. It is put in a shell material 31 together with getter agent and vacuumed and sealed to form the vacuum heat insulating material 30. The vacuum heat insulating material 30 is inserted into a refrigerator box, and a highly fluidable hard polyurethane foam including a cyclopentane/water-mixed foaming agent is foamed and filled therein. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

(Prior art 1)
As a conventional vacuum heat insulating material, there exists a thing shown by Unexamined-Japanese-Patent No. 2002-81596 (patent document 1). The vacuum heat insulating material described in Patent Document 1 is a vacuum heat insulating material composed of an inorganic fiber core material having a fiber diameter distribution peak value of 1 μm and 0.1 μm or less, and a skin material having a gas barrier property, The core material is composed of SiO2 as a main component and does not include a binder for solidifying the fiber material, so that it has flexibility as a vacuum heat insulating material.
(Prior art 2)
Moreover, as a conventional vacuum heat insulating material, there exist some which were shown by Unexamined-Japanese-Patent No. 2002-310384 (patent document 2). The vacuum heat insulating material described in Patent Document 2 has a gas barrier property and a core material in which a reinforcing material is laminated on one or both surfaces of an inorganic fiber aggregate having a fiber diameter distribution peak of 1 μm or less and 0.1 μm or more. It consists of a jacket material, and the inorganic fiber aggregate consists of a molded body of inorganic fiber and inorganic powder or inorganic fiber sheet that does not contain a binder for solidifying the fiber material.

JP 2002-81596 A JP 2002-310384 A

  In recent years, from the viewpoint of global warming, the necessity of reducing the power consumption of home appliances is desired. And since the refrigerator is a product that consumes a lot of electric power among household electrical appliances, it is proposed to reduce the amount of heat leakage of the heat insulating box by adopting a vacuum heat insulating material in the heat insulating box of the refrigerator. ing. In order to promote the application development of this vacuum heat insulating material, bendability should be imparted so that the vacuum heat insulating material can be disposed along the shape of the mounted portion without causing an increase in cost or a decrease in heat insulating performance. It is an important issue. Examples of the bendable vacuum heat insulating material include those described in Patent Document 1 and Patent Document 2 described above.

  However, in the vacuum heat insulating material of Patent Document 1, since ultrafine inorganic fibers having a fiber diameter distribution peak value of 1 μm or less and 0.1 μm or more are used, even a single product is low in productivity and expensive, and the fiber aggregate is overlapped. Therefore, it was necessary to increase the thickness, which resulted in an increase in the cost of the vacuum heat insulating material. Further, the vacuum heat insulating material of Patent Document 1 has a problem that the bendability is not good, and there is a problem that the shape returns to its original shape as time passes even if it is bent along the shape of the attached portion. For example, if the curved surface of the part to be attached is small, the vacuum insulation material attached may peel off due to the force of returning, or a gap may be created between the vacuum insulation material and the attached part. Had to be bent just before sticking. Therefore, the vacuum heat insulating material of Patent Document 1 still has a problem of ensuring both bendability and shape retention and improving thermal conductivity.

  Further, in the vacuum heat insulating material of Patent Document 2, since ultrafine inorganic fibers having a fiber diameter distribution peak value of 1 μm or less and 0.1 μm or more are used, even a single product is low in productivity and expensive, and the fiber aggregate is overlapped. Therefore, it was necessary to increase the thickness, which resulted in an increase in the cost of the vacuum heat insulating material. Moreover, in the vacuum heat insulating material in which the reinforcing material is put on one or both surfaces of the inorganic fiber aggregate as in Patent Document 2, it is possible to improve the surface property and the rigidity, but the bending property and the thermal conductivity are improved. The reduction is greatly affected by the reinforcing material, and there is a problem that it is particularly difficult to improve the thermal conductivity. Furthermore, in the vacuum heat insulating material of patent document 2, even if it bends along the shape of a to-be-attached part, there exists a problem that a shape will return as time passes. For example, if the curved surface of the part to be attached is small, the vacuum insulation material attached may peel off due to the force of returning, or a gap may be created between the vacuum insulation material and the attached part. Had to be bent just before sticking. Therefore, even with the vacuum heat insulating material of Patent Document 2, it is still a problem to make it possible to ensure both bendability and shape retention and to improve thermal conductivity.

  An object of the present invention is to provide a vacuum heat insulating material that is capable of ensuring both bendability and shape retention and improving thermal conductivity, and is friendly to the global environment, and a refrigerator using the same.

  A first aspect of the present invention for achieving the above object is a vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having gas barrier properties, and the core material has an average fiber diameter of 2 μm or more. And a deformation holding member that is deformable and can hold the deformed core material shape between the core materials, and the deformation holding member is a net made of an organic material. It is formed with a shape or a fibrous shape.

  In addition, a second aspect of the present invention for achieving the above object is a vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having gas barrier properties, and the core material has an average fiber diameter. A deformation holding member that is formed of a fiber polymer that does not include a binder of 2 μm or more and that can be deformed and can hold the deformed core material shape is disposed between the core materials, and the deformation holding member is a metal plate It is formed from what consists of.

A more preferable specific configuration example in the first aspect or the second aspect of the present invention is as follows.
(1) The fiber polymer of the core material has an average fiber diameter of 3 to 5 μm.
(2) The net-like or fibrous deformation-holding member made of an organic material is a polyolefin-based or polyester-based one.
(3) The deformation holding member made of the metal plate has a wire mesh shape or a plate shape.

  Furthermore, in the third aspect of the present invention, a vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having gas barrier properties is disposed in a space formed by an outer box and an inner box, and A refrigerator in which the space around a vacuum heat insulating material is filled with a foam heat insulating material, wherein the core material is formed of a fiber polymer having an average fiber diameter of 2 μm or more, and is deformable between the core materials. And the deformation | transformation holding member which can hold | maintain the shape of the core material after a deformation | transformation is arrange | positioned, the said deformation | transformation holding member is formed in the net-like or fiber-like thing which consists of organic substance, the said vacuum heat insulating material is comprised, The said vacuum heat insulating material is It is arranged by being deformed along the deformed portion of the outer box or the inner box.

  Furthermore, in the fourth aspect of the present invention, a vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having gas barrier properties is disposed in a space formed by an outer box and an inner box, and A refrigerator in which the space around a vacuum heat insulating material is filled with a foam heat insulating material, wherein the core material is formed of a fiber polymer having an average fiber diameter of 2 μm or more, and is deformable between the core materials. And the deformation | transformation holding member which can hold | maintain the core material shape after a deformation | transformation is arrange | positioned, the said deformation | transformation holding member is formed with what consists of metal plates, the said vacuum heat insulating material is comprised, and the said vacuum heat insulating material is the said outer box or the said It is arranged by being deformed along the deformed portion of the inner box.

A more preferable specific configuration example in the third aspect or the fourth aspect of the present invention is as follows.
(1) The fiber polymer of the core material has an average fiber diameter of 3 to 5 μm, and the net-like or fibrous deformation holding member made of the organic substance is a polyolefin-based, polyester-based, or the metal plate The deformation holding member is made of wire mesh or plate.

  According to the present invention, it is possible to provide a vacuum heat insulating material that is capable of ensuring both bendability and shape retention and improving thermal conductivity and is friendly to the global environment, and a refrigerator using the same.

  Hereinafter, the vacuum heat insulating material of one Embodiment of this invention and the refrigerator using the same are demonstrated using FIGS. 1-3.

  First, the whole refrigerator of this embodiment is demonstrated, referring FIG. FIG. 1 is a longitudinal sectional view showing a vacuum heat insulating material and a refrigerator using the same according to an embodiment of the present invention.

  The refrigerator includes a refrigerator box 20 formed in a box shape and a door 6 that opens and closes a front opening of the refrigerator box 20. The box 20 of the refrigerator is installed in a heat insulating wall in which an outer box 23 formed by press-molding an iron plate, an inner box 21 obtained by vacuum-forming ABS resin, and the outer box 23 and the inner box 21 are configured via a flange. The vacuum heat insulating materials 30, 80, and the outer box 23, the inner box 21, and the foam heat insulating material 22, such as urethane, which can adhere to the vacuum heat insulating materials 30, 80 and have adhesive strength to itself. . The heat insulating wall is composed of a bottom wall, side walls, a top wall, and a back wall. The vacuum heat insulating materials 30 and 80 are formed in a panel shape.

  The lowermost door 6 includes an outer box, an inner box, a vacuum heat insulating material 80 installed in a heat insulating wall formed by the outer box and the inner box, an outer box, an inner box, and the vacuum heat insulating material 80. It is comprised with foaming heat insulating materials, such as urethane which can adhere | attach and has the adhesive force in itself. A vacuum heat insulating material 80 may be installed on the upper door 6.

  Moreover, the box 20 of the refrigerator forms a plurality of storage chambers 10 to 12 having different temperatures, and partition walls (not shown) are provided between the storage chambers 10 to 12. The storage room 10 is a low temperature storage room (specifically, a freezing room), and is arranged at the lowermost part of the plurality of storage rooms. The storage room 11 is a storage room (specifically a vegetable room) whose temperature is higher than that of the low temperature storage room 10, and is arranged in an intermediate part of the plurality of storage rooms. The storage room 12 is a storage room (specifically, a refrigeration room) having a higher temperature than the storage room 10 having a low temperature, and is disposed at the top of the plurality of storage rooms. The storage chambers 10 to 12 are cooled using a refrigeration cycle including a compressor 13, a condenser 14, a decompression device, a cooler 15, and the like, a cooling fan 16, and the like.

  The inner box 21 constitutes a wall surface that forms the storage chambers 10 to 12 and includes a bottom surface, both side surfaces, a top surface, and a back surface. The outer box 23 constitutes a wall surface that forms the appearance of the box 20 of the refrigerator, and includes a bottom surface, both side surfaces, a top surface, and a back surface. In addition, it has the step part for forming the machine room which accommodates a compressor in the back side of the bottom wall of the box 20 of a refrigerator, and the bottom face of the inner box 21 and the outer box 23 is a step accompanying this. Has a part.

  The vacuum heat insulating material 30 is a vacuum heat insulating material disposed along the bent portion 24 of the heat insulating wall. When the vacuum heat insulating material 30 is installed on the inner box 21 side of the bent portion 24, the vacuum heat insulating material 30 is formed on the inner box 21 along the shape of the inner box 21. It is installed in close contact. Further, when the vacuum heat insulating material 30 is installed on the outer box 23 side of the bent portion 24, it is installed along the shape of the outer box 23.

  The bent portion 24 of the heat insulating wall is a portion constituting a deformed portion of the heat insulating wall. And the deformation | transformation part which is an uneven | corrugated | grooved part etc. in the inner box 21 or the outer box 23 other than the bending part 24 which is a corner | angular part where the two surfaces in the inner box 21 or the outer box 23 cross | intersect the deformation | transformation part of the heat insulation wall. included.

  The vacuum heat insulating material 80 is a vacuum heat insulating material provided in the flat surface portion of the heat insulating wall, and is a vacuum heat insulating material provided in the heat insulating wall without bending the vacuum heat insulating material 30 and in a planar shape. . The end of the vacuum heat insulating material 80 installed along one surface (back surface) of the outer box 23 extends from the one surface (upper surface or bottom surface) of the inner box 21 along the other surface (back surface) via the bent portion 24. Polymerization occurs at the end of the heat insulating material 30 and the projection surface. With such a configuration, the installation area of the vacuum heat insulating materials 30 and 80 can be increased while ensuring the filling property of the foam heat insulating material 22, and the heat insulating performance can be improved.

  Next, the vacuum heat insulating material applied to the bending part 24 in this embodiment is demonstrated with reference to FIG.2 and FIG.3. 2 is an enlarged cross-sectional view of a portion C of FIG. 1, and FIG. 3 is a cross-sectional view of the vacuum heat insulating material of FIG. 2 before being bent. In FIG. 2, in order to facilitate understanding of the vacuum heat insulating material 30, the vacuum heat insulating material 30 is emphasized from FIG.

  In FIG. 2, a vacuum heat insulating material 30 is a vacuum heat insulating material disposed so as to be in close contact with the inner box surface 21a along the shape of the inner box surface 21a of the bent portion 24 of the heat insulating wall. A core material 32 made of an inorganic fiber polymer that does not contain a binder is housed in a material 31 together with a deformation holding member 33 containing a getter agent 34 that adsorbs gas, and at a predetermined degree of vacuum. It is constructed by vacuum sealing.

  As the inorganic fiber polymer constituting the core material 32, a highly versatile polymer having an average fiber diameter of 3 μm to 5 μm is used, and the peak value of the fiber diameter distribution used for the vacuum heat insulating material of the prior art 3 is 1 μm or less. Compared with a super fine inorganic fiber of 0.1 μm or more, the fiber can be remarkably inexpensive and the bending property is remarkably good. As the core material 32, an organic fiber polymer may be used instead of the inorganic fiber polymer.

  The vacuum heat insulating material 30 is manufactured in a substantially planar shape as shown in FIG. 3 so that the productivity of the vacuum heat insulating material 30 itself can be improved at the time of manufacturing. And when incorporating the vacuum heat insulating material 30 manufactured as a substantially planar shape into the box body 20 of the refrigerator, as described above, the vacuum heat insulation is performed so as to closely adhere to the shape of the inner box surface 21a of the bent portion 24. The material 30 is installed in a bent state.

  Therefore, in this embodiment, the vacuum heat insulating material 30 manufactured as a substantially planar shape is bent at a predetermined curved radius and a predetermined angle as shown in FIG. 2, and the bent shape is maintained. In order to be able to do so, between the core material 32 formed of an inorganic fiber polymer, the deformation holding member 33 formed of a fibrous mat made of a biodegradable material or the powder made of a biodegradable material is put into a non-woven bag. A deformable holding member 33 formed in a packed manner is interposed. By using a biodegradable material as the deformation holding member 33, it can be made environmentally friendly.

  A core material 32 having a predetermined thickness is formed of a plurality of layers 32a and 32b, and a deformation holding member 33 is installed between the plurality of layers 32a and 32b, whereby the vacuum heat insulating material 30 has a predetermined curved surface radius. Thus, even when bent at a predetermined angle, the inorganic fiber polymer constituting the layers 32a and 32b of the core material 32 is less likely to break, and damage to the jacket material 31 by the inorganic fiber polymer is reduced. It is configured.

  That is, when the deformation holding member 33 is not installed between the core members 32, it is forcibly compressed at the inner surface radius portion of the core member 32, or is forcibly pulled at the outer surface radius portion of the core member 32. Since the force is received, the inorganic fiber polymer forming the core member 32 may be broken at a certain ratio.

On the other hand, in this embodiment, since the core material 32 is separated into the plurality of layers 32a and 32b by the deformation holding member 33, when the vacuum heat insulating material 30 is bent, the plurality of layers 32a or 32b are Since each of them bends independently, the amount of compression forcedly compressed at the inner radius portion or outer radius portion of the layer 32a is smaller than when the deformation holding member 33 is not installed, or the inner surface of the layer 32b. The amount forcibly pulled in the radius portion or the outer radius portion is smaller than that in the case where the deformation holding member 33 is not installed. Thus, the degree of destruction of the inorganic fiber polymer forming the layer 32a and the layer 32b is reduced, and the damage to the jacket material 31 by the inorganic fiber polymer is reduced.

  Next, description will be made with reference to Table 1. Table 1 is an explanatory table of various test data of Examples 1 to 5 and Comparative Example 1 which are vacuum heat insulating materials of the present embodiment.

（実施例１）
実施例１の真空断熱材３０は、平均繊維径が３μｍのグラスウール中にポリエチレンネット（メッシュ寸法（ｍｍ）：８×１４×０.８Φ）を挟みこみ、更に、各々エージング処理を行って作製した。その後、外被材３１に５種類の大きさ（５００ｍｍ×３００ｍｍ×１０ｍｍ、２２０ｍｍ×２００ｍｍ×１０ｍｍ、３００ｍｍ×２００ｍｍ×１０ｍｍ、２５０ｍｍ×２００ｍｍ×１０ｍｍ、４００ｍｍ×２５０ｍｍ×１０ｍｍ）の芯材と更にガスを吸着するゲッター剤４（モレキュラーシーブス１３Ｘ／活性炭）を詰め、真空包装機のロータリーポンプで１０分、拡散ポンプで１０分、真空断熱材の内部圧力が１.３Ｐａになるまで排気した後、端部をヒートシールで封止した。

Example 1
The vacuum heat insulating material 30 of Example 1 was produced by sandwiching a polyethylene net (mesh size (mm): 8 × 14 × 0.8Φ) in glass wool having an average fiber diameter of 3 μm, and further performing an aging treatment. . After that, the core material of five types (500 mm × 300 mm × 10 mm, 220 mm × 200 mm × 10 mm, 300 mm × 200 mm × 10 mm, 250 mm × 200 mm × 10 mm, 400 mm × 250 mm × 10 mm) and gas are further applied to the jacket material 31. Adsorbed getter agent 4 (Molecular Sieves 13X / activated carbon), exhausted until 10 minutes with rotary pump of vacuum packaging machine, 10 minutes with diffusion pump, and internal pressure of vacuum insulation becomes 1.3 Pa, end Was sealed with a heat seal.

  The thermal conductivity of the vacuum heat insulating material 30 (thickness: about 10 mm) thus obtained was measured at 10 ° C. using AUTO-Λ manufactured by Eihiro Seiki Co., Ltd. In addition, the bendability is determined by using a bending tester with the maximum bending load under the test conditions (speed: 10 mm / min, distance between fulcrums: 100 mm (support and indenters are round bars of Φ20 mm), displacement: 40 mm). N) was measured and evaluated. Further, the shape retention was observed after 4 hours. As a result, as shown in Table 1, the bendability was 95 N and the shape retention was good. The thermal conductivity was 2.9 mW / m · K. From this, the vacuum heat insulating material 30 of Example 1 can achieve both bendability, shape retention, and thermal conductivity, and the heat leakage amount can be reduced by inserting the vacuum heat insulating material of the present invention into the refrigerator box 20. And energy saving can be expected.

  Next, the vacuum heat insulating material 30 of Example 1 is inserted into the compressor peripheral part where the temperature difference is large in the refrigerator and the outer surface side of the inner box 5 on the rear side of the refrigerator, and further, the polyol and isocyanate are put into the refrigerator box 20, and the high-pressure foaming machine is installed. It was used for injection filling to prepare a refrigerator heat insulating material. The hard polyurethane foam 6 of the foam insulation is made of 40 parts by weight of a polyether polyol obtained by adding propylene oxide to m-tolylenediamine having an average hydroxyl value of 450 as a polyol, and having an average hydroxyl value of 470. 30 parts by weight of a polyether polyol obtained by adding propylene oxide to o-tolylenediamine, and 30 parts by weight of a polyether polyol obtained by adding propylene oxide to o-tolylenediamine having an average hydroxyl value of 380 -100 parts by weight of a component, 15 parts by weight of cyclopentane, 1.5 parts by weight of water, 1.2 parts by weight of tetramethylhexamethylenediamine as a reaction catalyst and 2 parts of trimethylaminoethylpiperazine, and an organic silicone compound as a foam stabilizer Millionate MR as 2 parts by weight of X-20-1614 as an isocyanate component Diphenylmethane diisocyanate - DOO syncytial was foam filling with 125 parts.

Thereafter, the amount of heat leakage and power consumption of the refrigerator were measured. The amount of heat leakage of the refrigerator was measured as the amount of heat leakage from the interior by setting the temperature condition opposite to the operation state of the refrigerator. Specifically, a refrigerator is installed in a temperature-controlled room at −10 ° C., and a temperature condition for comparing the power consumption and the cooling performance of the refrigerator by energizing the heaters so that the internal temperature becomes a predetermined measurement condition (temperature difference). Measured with The power consumption of the refrigerator was measured according to the JIS C9801 measurement standard. As a result, as shown in Table 1, a refrigerator capable of reducing the amount of heat leakage by 20% and the amount of power consumption by 13% was obtained compared to the refrigerator in which the vacuum heat insulating material 30 was not inserted.
(Example 2)
The vacuum heat insulating material 30 of Example 2 was produced by the same manufacturing method as Example 1. The used glass wool material does not contain a binder having an average fiber diameter of 3.5 μm. Further, an ethylene-vinyl alcohol copolymer net (mesh size (mm): 7 × 14 × 0.9Φ) is sandwiched between glass wool, and the core material 13 is subjected to aging treatment. The vacuum heat insulating material 30 (thickness: about 10 mm) was produced by inserting and sealing together with the getter agent 4 (Molecular Sieves 13X / activated carbon) that adsorbs. Thereafter, the shape bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 of Example 2 were measured. As a result, as shown in Table 1, the bendability was 92N, and the shape after 4 hours was maintained and good. The thermal conductivity was 3.0 mW / m · K.

Next, the vacuum heat insulating material 30 of Example 2 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five vacuum heat insulating materials 30 are inserted into the periphery of the compressor having a large temperature difference in the refrigerator and the outer surface side of the inner box 5 on the rear surface of the refrigerator, and the polyol and isocyanate are filled with foam in the same manner as in Example 1. And the heat insulating material of the refrigerator was produced and the amount of heat leaks and power consumption were evaluated. As a result, as shown in Table 1, compared with a refrigerator in which the vacuum heat insulating material 30 is not inserted, the heat leakage amount can be reduced by 18% and the power consumption amount can be reduced by 12%, thus enabling energy saving.
(Example 3)
The vacuum heat insulating material 30 of Example 3 was produced by the same manufacturing method as Example 1. The used glass wool material does not contain a binder having an average fiber diameter of 4 μm. Further, polypropylene fiber (needle punched product, mat thickness 5 mm) is sandwiched between glass wool, aging treatment of the core material 13 is performed, and the sheath material 31 is inserted and sealed together with a getter agent. A material 30 (thickness: about 10 mm) was produced. Thereafter, the shape bendability, shape retention and thermal conductivity of the vacuum heat insulating material 30 (thickness: about 10 mm) of Example 3 were measured. As a result, as shown in Table 1, the bendability was 98N, and the shape after 4 hours was maintained and was good. The thermal conductivity was 2.9 mW / m · K.

Next, the vacuum heat insulating material 30 of Example 3 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five vacuum heat insulating materials 30 are inserted into the periphery of the compressor having a large temperature difference in the refrigerator and the outer surface side of the inner box 5 on the rear surface of the refrigerator, and the polyol and isocyanate are filled with foam in the same manner as in Example 1. And the heat insulating material of the refrigerator was produced and the amount of heat leaks and power consumption were evaluated. As a result, as shown in Table 1, compared to a refrigerator in which the vacuum heat insulating material 30 was not inserted, the heat leakage amount was reduced by 19%, and the power consumption amount was reduced by 13%, thereby enabling energy saving.
Example 4
The vacuum heat insulating material 30 of Example 4 was produced by the same manufacturing method as Example 1. The used glass wool material does not contain a binder having an average fiber diameter of 4.5 μm. Further, polyester fiber (needle punched product, mat thickness 5 mm) is sandwiched between glass wool, aging treatment of the core material 13 is performed, and the sheathing material 31 is inserted and sealed together with a getter agent to form a vacuum heat insulating material 30 (thickness). : About 10 mm). Thereafter, the shape bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 of Example 4 were measured. As a result, as shown in Table 1, the bendability was 99N, and the shape after 4 hours was maintained and was good. The thermal conductivity was 3.3 mW / m · K.

Next, the vacuum heat insulating material 30 of Example 4 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five sheets of the vacuum heat insulating material 30 of Example 4 are inserted into the periphery of the compressor having a large temperature difference in the refrigerator and the outer surface side of the inner box 5 on the back of the refrigerator. The refrigerator was filled with isocyanate to produce a heat insulating material for the refrigerator, and the amount of heat leakage and power consumption were evaluated. As a result, as shown in Table 1, the amount of heat leakage can be reduced by 14% and the amount of power consumption can be reduced by 8% compared to the refrigerator in which the vacuum heat insulating material 30 is not inserted.
(Example 5)
A vacuum heat insulating material 30 of Example 5 was manufactured by the same manufacturing method as Example 1. The glass wool material used does not contain a binder having an average fiber diameter of 5 μm. Further, a deformation holding member 33 of polyester fiber (needle punched product, mat thickness 8 mm) is sandwiched between glass wool, the core material 13 is subjected to aging treatment, inserted into the jacket material 31 together with a getter agent, and sealed. A heat insulating material 30 (thickness: about 10 mm) was produced. Thereafter, the bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 of Example 5 were measured. As a result, as shown in Table 1, the bendability was 92N, and the shape after 4 hours was maintained and good. The thermal conductivity was 3.5 mW / m · K.

  Next, the vacuum heat insulating material 30 of Example 5 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five sheets of the vacuum heat insulating material 30 of Example 5 are inserted into the compressor peripheral part where the temperature difference is large in the refrigerator and the outer surface side of the inner box 5 on the back of the refrigerator. The refrigerator was filled with isocyanate to produce a heat insulating material for the refrigerator, and the amount of heat leakage and power consumption were evaluated. As a result, as shown in Table 1, the heat leakage amount was reduced by 11% and the power consumption amount by 6% as compared with the refrigerator in which the vacuum heat insulating material 30 was not inserted, and energy saving was possible.

  Next, a description will be given with reference to Table 2. Table 2 is an explanatory table of various test data of Examples 6 to 10 and Comparative Example 1 which are vacuum heat insulating materials of the present embodiment.

（実施例６）
実施例６の真空断熱材３０は、結合剤を含まない平均繊維径が３μｍのグラスウール中に変形保持部材３３であるエキスパンドメタル（メッシュ寸法（ｍｍ）：７×１４×０.５Φ）を挟み、更に１８０℃で１時間のエージング処理を行って作製した。その後、外被材３１に５種類の大きさ（５００ｍｍ×３００ｍｍ×１０ｍｍ、２２０ｍｍ×２００ｍｍ×１０ｍｍ、３００ｍｍ×２００ｍｍ×１０ｍｍ、２５０ｍｍ×２００ｍｍ×１０ｍｍ、４００ｍｍ×２５０ｍｍ×１０ｍｍ）の芯材と更にガスを吸着するゲッター剤４（モレキュラーシーブス１３Ｘ／活性炭）を詰め、真空包装機のロータリーポンプで１０分、拡散ポンプで１０分、真空断熱材の内部圧力が１.３Ｐａになるまで排気した後、端部をヒートシールで封止して真空断熱材３０（厚み：約１０ｍｍ）を作製した。その後、実施例５の真空断熱材３０の折り曲げ性と形状保持性及び熱伝導率を測定した。その結果、表１に示すように、折り曲げ性は９２Ｎで、４ｈ経過後の形状は保持され良好であった。また、熱伝導率は２．０ｍＷ／ｍ・Ｋを示した。このことから、実施例６の真空断熱材は折り曲げ性と形状保持性及び熱伝導率の両立化が図れ、冷蔵庫箱体２０に実施例６の真空断熱材を挿入することにより熱漏洩量の低減及び省エネ化が期待できる。
次に、実施例５の真空断熱材３０を実施例１と同様に冷蔵庫箱体２０に挿入して実機冷蔵庫の特性評価を行った。冷蔵庫箱体２０中には、実施例５の真空断熱材３０を冷蔵庫で温度差が大きいコンプレッサー周辺部及び冷蔵庫背面の内箱５の外面側に５枚挿入し、実施例１と同様にポリオールとイソシアネートを発泡充填して冷蔵庫の断熱材を作製し、熱漏洩量及び消費電力量を評価した。その結果、表１に示すように、真空断熱材３０を挿入しなかった冷蔵庫と比べて熱漏洩量で２３％、消費電力量で１６％低減でき省エネ化が可能となった。
（実施例７）
実施例１と同様の製作方法で実施例７の真空断熱材３０を作製した。用いたグラスウール材は平均繊維径が３.５μｍの結合剤を含まないものである。更に、エキスパンドメタル（メッシュ寸法（ｍｍ）：５×１０×０.５Φ）の変形保持部材３３をグラスウール中に挟み、芯材１３のエージング処理を行い、外被材３１に更にガスを吸着するゲッター剤４（モレキュラーシーブス１３Ｘ／活性炭）と共に挿入封止して真空断熱材３０（厚み：約１０ｍｍ）を作製した。その後、真空断熱材３０の形状曲げ折り性と形状保持性及び熱伝導率を測定した。その結果、折り曲げ性は９５Ｎで、４ｈ経過後の形状は保持され良好であった。また、熱伝導率は２．１ｍＷ／ｍ・Ｋを示した。

(Example 6)
The vacuum heat insulating material 30 of Example 6 sandwiched an expanded metal (mesh size (mm): 7 × 14 × 0.5Φ) as a deformation holding member 33 in glass wool having an average fiber diameter of 3 μm that does not contain a binder, Further, it was produced by performing an aging treatment at 180 ° C. for 1 hour. After that, the core material of five types (500 mm × 300 mm × 10 mm, 220 mm × 200 mm × 10 mm, 300 mm × 200 mm × 10 mm, 250 mm × 200 mm × 10 mm, 400 mm × 250 mm × 10 mm) and gas are further applied to the jacket material 31. Adsorbed getter agent 4 (Molecular Sieves 13X / activated carbon), exhausted until 10 minutes with rotary pump of vacuum packaging machine, 10 minutes with diffusion pump, and internal pressure of vacuum insulation becomes 1.3 Pa, end Was sealed with a heat seal to prepare a vacuum heat insulating material 30 (thickness: about 10 mm). Thereafter, the bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 of Example 5 were measured. As a result, as shown in Table 1, the bendability was 92N, and the shape after 4 hours was maintained and good. The thermal conductivity was 2.0 mW / m · K. From this, the vacuum heat insulating material of Example 6 can achieve bendability, shape retention, and thermal conductivity, and the amount of heat leakage can be reduced by inserting the vacuum heat insulating material of Example 6 into the refrigerator box 20. And energy saving can be expected.
Next, the vacuum heat insulating material 30 of Example 5 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five sheets of the vacuum heat insulating material 30 of Example 5 are inserted into the compressor peripheral part where the temperature difference is large in the refrigerator and the outer surface side of the inner box 5 on the back of the refrigerator. The refrigerator was filled with isocyanate to produce a heat insulating material for the refrigerator, and the amount of heat leakage and power consumption were evaluated. As a result, as shown in Table 1, compared with a refrigerator in which the vacuum heat insulating material 30 was not inserted, the heat leakage amount was reduced by 23% and the power consumption amount was reduced by 16%, thereby enabling energy saving.
(Example 7)
A vacuum heat insulating material 30 of Example 7 was manufactured by the same manufacturing method as Example 1. The used glass wool material does not contain a binder having an average fiber diameter of 3.5 μm. Further, an expand metal (mesh size (mm): 5 × 10 × 0.5Φ) deformation holding member 33 is sandwiched between glass wool, the core material 13 is aged, and a getter that further adsorbs gas to the jacket material 31 is obtained. Inserted and sealed together with Agent 4 (Molecular Sieves 13X / activated carbon) to prepare a vacuum heat insulating material 30 (thickness: about 10 mm). Thereafter, the shape bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 were measured. As a result, the bendability was 95 N, and the shape after 4 hours was maintained and was good. The thermal conductivity was 2.1 mW / m · K.

Next, the vacuum heat insulating material 30 of Example 7 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five sheets of the vacuum heat insulating material 30 of Example 7 are inserted into the periphery of the compressor having a large temperature difference in the refrigerator and the outer surface side of the inner box 5 on the back of the refrigerator. The refrigerator was filled with isocyanate to produce a heat insulating material for the refrigerator, and the amount of heat leakage and power consumption were evaluated. As a result, compared with a refrigerator in which the vacuum heat insulating material 30 is not inserted, the heat leakage amount can be reduced by 20% and the power consumption amount can be reduced by 15%.
(Example 8)
A vacuum heat insulating material 30 of Example 8 was produced by the same production method as Example 1. The used glass wool material does not contain a binder having an average fiber diameter of 4 μm. Further, an expanded metal (mesh size (mm): 15 × 30 × 0.5Φ) deformation holding member 33 is sandwiched between glass wool, the core material 13 is aged, and the outer cover material 31 is inserted and sealed together with the getter agent. Thus, a vacuum heat insulating material 30 (thickness: about 10 mm) was produced. Thereafter, the shape bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 were measured. As a result, the bendability was 90 N, and the shape after 4 hours was maintained and was good. The thermal conductivity was 2.2 mW / m · K.

Next, the vacuum heat insulating material 30 of Example 8 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five sheets of the vacuum heat insulating material 30 of Example 8 are inserted in the refrigerator peripheral portion having a large temperature difference in the refrigerator and on the outer surface side of the inner box 5 on the rear surface of the refrigerator. The refrigerator was filled with isocyanate to produce a heat insulating material for the refrigerator, and the amount of heat leakage and power consumption were evaluated. As a result, compared with a refrigerator in which the vacuum heat insulating material 30 is not inserted, the amount of heat leakage can be reduced by 19% and the amount of power consumption can be reduced by 14%.
Example 9
A vacuum heat insulating material 30 of Example 9 was manufactured by the same manufacturing method as Example 1. The used glass wool material does not contain a binder having an average fiber diameter of 4.5 μm. Furthermore, the aluminum thin plate thickness: 0.1 mm of the deformation holding member 33 is sandwiched between glass wool, the core material 13 is aged, and the outer cover material 31 is inserted and sealed together with the getter agent. (Thickness: about 10 mm) was produced. Thereafter, the bending characteristics, shape retention, and thermal conductivity of the vacuum heat insulating material 30 were measured. As a result, the bendability was 99N, and the shape after 4 hours was maintained and good. The thermal conductivity was 2.6 mW / m · K.

Next, the vacuum heat insulating material 30 of Example 9 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five sheets of the vacuum heat insulating material 30 of Example 9 are inserted into the periphery of the compressor having a large temperature difference in the refrigerator and the outer surface side of the inner box 5 on the back of the refrigerator. The refrigerator was filled with isocyanate to produce a heat insulating material for the refrigerator, and the amount of heat leakage and power consumption were evaluated. As a result, compared with a refrigerator in which the vacuum heat insulating material 30 is not inserted, the amount of heat leakage can be reduced by 18% and the amount of power consumption can be reduced by 14%.
(Example 10)
The vacuum heat insulating material 30 of Example 10 was produced by the same manufacturing method as Example 1. The glass wool material used does not contain a binder having an average fiber diameter of 5 μm. Further, a wire mesh (mesh size (mm): 10 × 20 × 0.5Φ) deformation holding member 33 is sandwiched between glass wool, the core material 13 is aged, and the outer cover material 31 is inserted and sealed together with the getter agent. Thus, a vacuum heat insulating material 30 (thickness: about 10 mm) was produced. Thereafter, the bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 of Example 10 were measured. As a result, the bendability was 92N, and the shape after 4 hours was maintained and good. The thermal conductivity was 2.7 mW / m · K.

Next, the vacuum insulation material 30 of Example 10 was inserted into the refrigerator box 20 in the same manner as in Example 1 to evaluate the characteristics of the actual refrigerator. In the refrigerator box 20, five vacuum heat insulating materials 30 are inserted into the periphery of the compressor having a large temperature difference in the refrigerator and the outer surface side of the inner box 5 on the rear surface of the refrigerator, and the polyol and isocyanate are filled with foam in the same manner as in Example 1. And the heat insulating material of the refrigerator was produced and the amount of heat leaks and power consumption were evaluated. As a result, compared with a refrigerator in which the vacuum heat insulating material 30 is not inserted, the heat leakage amount can be reduced by 17% and the power consumption amount can be reduced by 13%.
(Comparative Example 1)
The vacuum heat insulating material 30 of the comparative example 1 which does not use the deformation | transformation holding member 33 with the manufacturing method similar to Example 1 was produced. The glass wool material used has an average fiber diameter of 6 μm. Furthermore, the aging process of the glass wool core material 13 was performed, and it inserted and sealed to the jacket material 31, and produced the vacuum heat insulating material 30 (thickness: about 10 mm) of the comparative example 1. Thereafter, the bendability, shape retention, and thermal conductivity of the vacuum heat insulating material 30 were measured. As a result, as shown in Table 1, the bendability was 125 N, and the shape after 4 hours had not been maintained and was poor. The thermal conductivity was 4.3 mW / m · K.

  Next, the vacuum heat insulating material 30 of the comparative example 1 was inserted in the refrigerator box 20 similarly to Example 1, and the characteristic evaluation of the actual refrigerator was performed. In the refrigerator box 20, five sheets of the vacuum heat insulating material 30 of Comparative Example 1 are inserted in the refrigerator peripheral portion having a large temperature difference in the refrigerator and the outer surface side of the inner box 5 on the back of the refrigerator. The refrigerator was filled with isocyanate to produce a heat insulating material for the refrigerator, and the amount of heat leakage and power consumption were evaluated. As a result, as shown in Table 1, compared with the refrigerator in which the vacuum heat insulating material 30 was not inserted, the heat leakage amount could be reduced only by 9% and the power consumption amount by 4%, and the energy saving effect was small.

  As described above, according to the present embodiment, the core material 32 is formed of a fiber polymer that does not include a binder having an average fiber diameter of 2 μm or more, and is deformable between the core materials 32 and after being deformed. The deformation holding member 33 capable of holding the core material shape is disposed, and the deformation holding member 33 is formed of a net-like or fiber-like material made of organic matter or a metal plate, and these are formed in the gas barrier outer covering material 31. In addition, since the vacuum heat insulating material 30 is vacuum-sealed, the high performance vacuum heat insulating material 30 capable of achieving both bendability, shape retention and heat insulating properties can be provided.

  Moreover, according to this embodiment, it is the vacuum heat insulating material 30 characterized by the inorganic fiber polymer of the core material 32 being the glass wool which has an average fiber diameter of 3-5 micrometers. Here, it is preferable that the diameter of the glass wool which does not contain a binder is 3-5 micrometers. Inorganic fiber polymers vary greatly in thermal conductivity characteristics and cost depending on the average fiber diameter. For example, glass wool having an average fiber diameter of 5 μm or more is a material that is easy to put into practical use because it is inexpensive in terms of cost, but its thermal conductivity is greatly inferior. The reason is considered that the fibers are arranged in the same direction and the contact of the fibers is close to a line, so that the contact thermal resistance is reduced and the thermal conductivity is increased. On the other hand, a fiber having an average fiber diameter of less than 2 μm is low in productivity and expensive even if it is a single product, and it is necessary to increase the thickness by stacking fiber assemblies. Use as is difficult. In addition to contact resistance, the heat flow path becomes zig-zag, and glass wool with an average fiber diameter of 3 to 5 μm and no binder is selected from many fiber materials that increase thermal resistance and lower thermal conductivity. And the vacuum heat insulating material 30 which balanced bendability, shape retainability, and heat insulation was discovered.

  As the inorganic fiber polymer, fibers containing no binder such as glass wool, glass fiber, alumina, silica alumina, silica, rock wool and silicon carbide can be used.

In this embodiment, the net-like or fiber-like deformation holding member 33 made of an organic material is a polyolefin-based or polyester-based one, and the deformation holding member 33 made of a metal plate is a wire net-like or plate-like one. Here, it is preferable to select a material with less gas generation such as polyethylene, polypropylene, and polyethylene terephthalate as the net or fiber. The thinner the net and the smaller the fiber diameter, the better in terms of thermal conductivity. The metal plate deformation holding member 33 is preferably made of a material such as aluminum, stainless steel, titanium, iron, copper, or an alloy. In particular, a vacuum heat insulating material using an aluminum expanded metal or a wire mesh is light and easy to use. Preferred to achieve.
For the purpose of dehydrating and degassing the core material, it is also effective to subject the core material and the like to aging treatment before inserting the gas barrier film. The heating temperature at this time is preferably 110 ° C. for the organic matter because the minimum dehydration is possible, and glass wool is more preferably 180 ° C. or higher.

  Further, the jacket material 31 covers the core material 32 in order to provide an airtight portion therein, and the material configuration is not particularly limited. For example, polyethylene terephthalate resin in the outermost layer, aluminum foil in the intermediate layer, plastic laminate film made of high-density polyethylene resin in the innermost layer, for example, ethylene with polyethylene terephthalate resin in the outermost layer and aluminum vapor deposition layer in the intermediate layer Examples include a vinyl alcohol copolymer resin and a plastic laminate film made of a high-density polyethylene resin in the innermost layer in a bag shape. This is because each of these layers and the outermost layer of the jacket material 31 are to cope with impact and the like, the intermediate layer is to ensure gas barrier properties, and the innermost layer is sealed by heat fusion. Therefore, as long as it meets these purposes, all known materials can be used, and as a means for further improvement, piercing resistance is improved by applying a polyamide resin or the like to the outermost layer, or an intermediate layer is provided. Two layers of ethylene-vinyl alcohol copolymer resin having an aluminum vapor deposition layer may be provided. The innermost layer to be heat-sealed is preferably a high-density polyethylene resin from the viewpoint of sealing properties, chemical attack properties, etc. In addition to this, polypropylene resin, polyacrylonitrile resin, or the like may be used. As a specific configuration of the material of the jacket material 31, for example, an outer layer made of polyamide, a second layer made of polyethylene terephthalate resin, a third layer made of aluminum foil, and an innermost layer made of high-density polyethylene resin. Laminated film.

  In addition, in order to further improve the reliability of vacuum heat insulating materials, gas adsorbents such as dawsonite, hydrotalcite, metal hydroxide, etc., or molecular sieves, silica gel, calcium oxide, zeolite, activated carbon are used as a getter agent. A water adsorbent such as potassium hydroxide, sodium hydroxide or lithium hydroxide is used.

  The shape, such as the outer shape and thickness, of the vacuum heat insulating material 30 is not particularly limited, and various shapes and thicknesses can be applied depending on the location and workability.

  This embodiment is the refrigerator heat insulation box body 20 or the heat insulation door body 6 in which the hard resin foam 22 is filled in the space composed of the outer box 23 and the inner box 21, and the vacuum heat insulating material 30 according to any one of the above embodiments. And the hard resin foam 22 as a heat insulating material inside the box body 20 or the heat insulating door body 6.

  The present embodiment is a refrigerator characterized in that the hard resin foam 22 is a polyurethane foam using cyclopentane and water as a mixed foaming agent.

  Here, examples of the hard resin foam 22 include hard urethane foam, phenol foam, and styrene foam. Among these, a rigid polyurethane foam using cyclopentane and water as a mixed foaming agent is preferable.

The rigid polyurethane foam of this embodiment is obtained by reacting an isocyanate in the presence of a foaming agent, a foam stabilizer, and a reaction catalyst using a polyol as a basic raw material. As the polyol, from m-tolylenediamine (2,4-tolylenediamine, 2,6-tolylenediamine) and o-tolylenediamine (2,3-tolylenediamine, 3,4-tolylenediamine) The propylene oxide adduct of the initiator was mainly used. Other initiators include dihydric alcohol propylene glycol, dipropylene glycol, trihydric alcohol glycerin, trimethylolpropane, polyhydric alcohol diglycerin, methyl glucoside, sorbitol. , Sucrose, alkylenepolyamine ethylenediamine, diethylenetriamine, alkanolamine monoethanolamine, diethanolamine, isopropanolamine and other diaminodiphenylmethane, bisphenol A, and polymethylene polyphenylpolyamine as adducts with various alkylene oxides. Using. Diisocyanate diisocyanate polynuclear is mainly used as the isocyanate. Since the isocyanate using the diphenylmethane diisocyanate polynuclear body has a small difference in viscosity from the polyether polyol solution, the compatibility with the polyether polyol is improved. By using diphenylmethane diisocyanate polynuclear bodies, the initial reaction is relatively fast and the gelation and curing are slowed down, so that the amount of foam expansion at the time of demolding is reduced. If it is a small amount, tolylene diisocyanate isomer mixture, 2,4-isomer 100 parts, 2,4-isomer / 2,6-isomer = 80/20, 65/35 (weight ratio) as well as trade name Mitsui Cosmonate TRC, Takeda's Takenate 4040 prepolymer urethane modified tolylene diisocyanate, allophanate modified tolylene diisocyanate, biuret modified tolylene diisocyanate, isocyanurate modified tolylene diisocyanate and the like can also be used. As the 4,4'-diphenylmethane diisocyanate, the product name Mitsui Cosmonate M-200, which contains a polynuclear compound of three or more nuclei in addition to the pure product as the main component, the diphenylmethane isocyanate polynuclear product of Millionate MR manufactured by Takeda it can. Further, as the foaming agent, hydrocarbon-based foaming agent cyclopentane and water are used. 12 to 18 parts by weight of cyclopentane and less than 1.8 parts by weight of water are combined per 100 parts by weight of the polyol mixture. In general, if a large amount of cyclopentane and water is used, the density can be easily reduced. However, if there is a large amount of water, the partial pressure of carbon dioxide in the bubble cell increases and the amount of swelling increases. Inferiority. As a reaction catalyst, tetramethylhexamethylenediamine, pentamethyldiethylenetriamine, and a trimerization catalyst can be used in combination to increase the high-speed reaction and cure properties. The blending amount of the reaction catalyst is preferably 2 to 5 parts by weight with respect to 100 parts by weight of the polyol component. Other than that, tertiary amines such as trimethylaminoethylpiperazine, triethylenediamine, tetramethylethylenediamine, trimerization catalyst tris (3-dimethylaminopropyl) hexahydro-S-triazine, slow-acting catalyst dipropylene glycol, and potassium chloride acetate It can be used if the reactivity matches. As the foam stabilizer, the foam is uniformly expanded and has a uniform strength because the size of the bubble cell is aligned with the lower surface tension. The blending amount of the foam stabilizer is 1.5 to 4 parts by weight per 100 parts by weight of the polyol component. For example, B-8461 and B-8462 manufactured by Goldschmidt, X-20-1614, X-20-1634 manufactured by Shin-Etsu Chemical, and SZ-1127 and SZ-1671 manufactured by Nippon Unica are used. A rigid polyurethane foam is foamed using the above materials. As the foaming machine, for example, a PU-30 type foaming machine manufactured by PROMAT Co., Ltd. is used. Foaming conditions vary slightly depending on the type of foaming machine, but usually a liquid temperature of 18 to 30 ° C., a discharge pressure of 80 to 150 kg / cm ² , a discharge amount of 15 to 30 kg / min, and a mold box temperature of 35 to 45 ° C. are preferable. It is.

  The refrigerator in the present invention includes vending machines, product display shelves, product display cases, cool storage boxes, cooler boxes, refrigeration / freezers, etc., in addition to home and commercial refrigeration / freezers.

  As a method of inserting the vacuum heat insulating material 30 and the hard resin foam into the heat insulating box and / or the heat insulating door inside the box constituted by the inner box and the outer box, the inner box and the outer box are preliminarily used. The vacuum heat insulating material 30 is disposed in the formed space, and then a method of injecting and integrally molding the hard resin foam, or preparing a heat insulating board in which the vacuum heat insulating material 30 and the hard resin foam are integrally molded in advance, There are various methods such as attaching the heat insulation board to the inner box or the outer box or sandwiching them between the two, but the present invention is not particularly limited thereto.

  In the present embodiment, the core material 32 is made of an organic substance in an inorganic fiber that does not contain a binder, and the net-like or fibrous deformation holding member 33 made of an organic substance is sandwiched between inorganic fibers that do not contain a binder. The net-like or fiber-like deformation holding member 33 is sandwiched, the deformation holding member 33 made of a metal plate is sandwiched between inorganic fibers whose core material does not contain a binder, put in a gas barrier film together with a getter agent, and evacuated, It is a manufacturing method of the vacuum heat insulating material 30 characterized by sealing an opening.

It is a longitudinal cross-sectional view which shows the vacuum heat insulating material of one Embodiment of this invention, and the refrigerator using the same. It is sectional drawing to which the C section of FIG. 1 was expanded. It is sectional drawing which shows the state before bending of the vacuum heat insulating material of FIG.

Explanation of symbols

  6 ... Door, 10-12 ... Storage room, 20 ... Refrigerator box, 21 ... Inner box, 22 ... Foam insulation, 23 ... Outer box, 24 ... Bend (deformation), 30 ... Vacuum insulation, 31 ... jacket material, 32 (32a, 32b) ... core material, 33 ... deformation holding member, 34 ... getter agent, 80 ... vacuum heat insulating material.

Claims (8)

A vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having gas barrier properties,
The core material is formed of a fiber polymer that does not include a binder having an average fiber diameter of 2 μm or more,
A deformation holding member that can be deformed and can hold the deformed core material shape is disposed between the core materials,
A vacuum heat insulating material, wherein the deformation holding member is formed of a net or fiber made of an organic material. A vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having gas barrier properties,
The core material is formed of a fiber polymer that does not include a binder having an average fiber diameter of 2 μm or more,
A deformation holding member that can be deformed and can hold the deformed core material shape is disposed between the core materials,
A vacuum heat insulating material, wherein the deformation holding member is made of a metal plate.   The vacuum heat insulating material according to claim 1 or 2, wherein the fiber polymer of the core material has an average fiber diameter of 3 to 5 µm.   2. The vacuum heat insulating material according to claim 1, wherein the net-like or fibrous deformation holding member made of an organic material is a polyolefin-based or polyester-based material.   The vacuum heat insulating material according to claim 2, wherein the deformation holding member made of the metal plate is in a wire mesh shape or a plate shape. A vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having a gas barrier property is disposed in a space formed by the outer box and the inner box, and a foam heat insulating material is provided in the space around the vacuum heat insulating material. A refrigerator filled with
The core material is formed of a fiber polymer having an average fiber diameter of 2 μm or more, and a deformation holding member that can be deformed and can hold the deformed core material shape is disposed between the core materials, and the deformation holding member Forming the vacuum heat insulating material by forming a net or fiber made of organic matter,
A refrigerator, wherein the vacuum heat insulating material is deformed and arranged along a deformed portion of the outer box or the inner box. A vacuum heat insulating material obtained by vacuum-sealing a core material in a jacket material having a gas barrier property is disposed in a space formed by the outer box and the inner box, and a foam heat insulating material is provided in the space around the vacuum heat insulating material. A refrigerator filled with
The core material is formed of a fiber polymer having an average fiber diameter of 2 μm or more, and a deformation holding member that can be deformed and can hold the deformed core material shape is disposed between the core materials, and the deformation holding member Is formed of a metal plate to constitute the vacuum heat insulating material,
A refrigerator, wherein the vacuum heat insulating material is deformed and arranged along a deformed portion of the outer box or the inner box.   The refrigerator according to claim 6 or 7, wherein the fiber polymer of the core material has an average fiber diameter of 3 to 5 µm, and the net-like or fibrous deformation holding member made of the organic material is a polyolefin-based polyester. A refrigerator characterized in that the deformation holding member made of a metal plate or the metal plate is of a wire mesh shape or a plate shape.

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