JP2019168001A - Vacuum heat insulating material and refrigerator using vacuum heat insulating material - Google Patents

Vacuum heat insulating material and refrigerator using vacuum heat insulating material Download PDF

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Publication number
JP2019168001A
JP2019168001A JP2018054838A JP2018054838A JP2019168001A JP 2019168001 A JP2019168001 A JP 2019168001A JP 2018054838 A JP2018054838 A JP 2018054838A JP 2018054838 A JP2018054838 A JP 2018054838A JP 2019168001 A JP2019168001 A JP 2019168001A
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heat insulating
vacuum heat
sheet
insulating material
sheet body
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英司 品川
Hideji Shinagawa
英司 品川
大謹 小林
Tomochika Kobayashi
大謹 小林
篤志 冨田
Atsushi Tomita
篤志 冨田
太陽 中野
Taiyo Nakano
太陽 中野
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Toshiba Lifestyle Products and Services Corp
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Toshiba Lifestyle Products and Services Corp
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Priority to JP2018054838A priority Critical patent/JP2019168001A/en
Priority to CN201920288387.3U priority patent/CN209877463U/en
Priority to CN201910171797.4A priority patent/CN110296573A/en
Publication of JP2019168001A publication Critical patent/JP2019168001A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
    • F16L59/028—Composition or method of fixing a thermally insulating material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D2500/00—Problems to be solved
    • F25D2500/02—Geometry problems

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Thermal Insulation (AREA)
  • Refrigerator Housings (AREA)

Abstract

To provide a vacuum heat insulating material capable of securing heat insulating performance over a long term with cost increase suppressed, and a refrigerator using the vacuum heat insulating material.SOLUTION: A vacuum heat insulating material 10 comprises a core material 30 and a jacket material 14 that stores the core material 30 and holds the inside in a decompressed state. The core material 30 comprises a pair of first sheet bodies 32 and 33 that are made of a fiber assembly and are arranged so as to face the jacket material 14, and a second sheet body 34 that is made of a fiber assembly and is arranged between the first sheet bodies 32 and 33. The first sheet bodies 32 and 33 are those in which the weight ratio of foreign matters contained in the fiber assembly having a predetermined volume is smaller than that of the second sheet body 34.SELECTED DRAWING: Figure 4

Description

本発明の実施形態は、真空断熱材及び真空断熱材を用いた冷蔵庫に関するものである。   Embodiments of the present invention relate to a vacuum heat insulating material and a refrigerator using the vacuum heat insulating material.

近年、断熱箱体を構成する断熱壁の内部に真空断熱材を配置した冷蔵庫が知られている。例えば特許文献１及び２には、真空断熱材として、芯材と、この芯材を被覆する外被材とを備え、外被材の内部を減圧密封したものが開示されている。芯材として無機系材料の繊維集合体を用いる場合、芯材を構成する繊維より大きい未繊維化物や金属片などの異物が混入しやすい。   In recent years, a refrigerator in which a vacuum heat insulating material is disposed inside a heat insulating wall constituting a heat insulating box is known. For example, Patent Documents 1 and 2 disclose a vacuum heat insulating material that includes a core material and a jacket material that covers the core material, and the inside of the jacket material is sealed under reduced pressure. When a fiber aggregate of an inorganic material is used as the core material, foreign matters such as unfiberized materials and metal pieces larger than the fibers constituting the core material are likely to be mixed.

このような異物が芯材とともに外被材の内部に減圧密封されると、外被材に異物が密着して外被材を傷つけるおそれがあるため、断熱性能が悪化しやすい。異物を除去した繊維集合体を用いて芯材全体を形成することも考えられるが、異物の除去に時間を要しコストがかかる。   When such a foreign material is sealed under reduced pressure inside the jacket material together with the core material, the foreign material may come into close contact with the jacket material and damage the jacket material, so that the heat insulation performance is likely to deteriorate. Although it is conceivable to form the entire core using a fiber assembly from which foreign matters have been removed, it takes time to remove the foreign matters and costs high.

特開２０１２−１５９１４４号公報JP 2012-159144 A 特開２０１５−４０６７４号公報Japanese Patent Laying-Open No. 2015-40674

そこで、コスト増加を抑えつつ長期に亘って断熱性能を確保できる真空断熱材及び真空断熱材を用いた冷蔵庫を提供することを目的とする。   Then, it aims at providing the refrigerator using the vacuum heat insulating material and vacuum heat insulating material which can ensure heat insulation performance over a long term, suppressing cost increase.

本実施形態の真空断熱材は、芯材と、前記芯材を収納して内部を減圧状態で保持する外被材とを備えた真空断熱材において、前記芯材は、繊維集合体からなり前記外被材に対向して配置された一対の第１シート体と、繊維集合体からなり前記第１シート体の間に配置された第２シート体とを備え、前記第１シート体は、所定体積の繊維集合体に含まれる異物の重量比率が前記第２シート体より少ないものである。   The vacuum heat insulating material of this embodiment is a vacuum heat insulating material provided with a core material and an outer jacket material that houses the core material and holds the inside in a reduced pressure state. A pair of first sheet bodies disposed opposite to the jacket material, and a second sheet body formed of a fiber assembly and disposed between the first sheet bodies, wherein the first sheet body is a predetermined one The weight ratio of the foreign matter contained in the volume fiber assembly is smaller than that of the second sheet body.

本実施形態の冷蔵庫は、外箱と内箱との間に真空断熱材が配設された冷蔵庫において、 前記真空断熱材は、芯材と、前記芯材を収納して内部を減圧状態で保持する外被材とを備え、前記芯材は、繊維集合体からなり前記外被材に対向して配置された一対の第１シート体と、繊維集合体からなり前記第１シート体の間に配置された第２シート体とを備え、前記第１シート体は、所定体積の繊維集合体に含まれる異物の重量比率が前記第２シート体より少ないものである。   The refrigerator of this embodiment is a refrigerator in which a vacuum heat insulating material is disposed between an outer box and an inner box. The vacuum heat insulating material stores a core material and the core material, and holds the inside in a reduced pressure state. The core material is formed of a fiber assembly and is disposed between the pair of first sheet bodies disposed opposite to the jacket material and the first sheet body. The first sheet body has a smaller weight ratio of foreign matters contained in the fiber assembly having a predetermined volume than the second sheet body.

第１実施形態に係る真空断熱材を備えた冷蔵庫の断面図。Sectional drawing of the refrigerator provided with the vacuum heat insulating material which concerns on 1st Embodiment. 第１実施形態に係る真空断熱材の平面図。The top view of the vacuum heat insulating material which concerns on 1st Embodiment. 図２のＡ−Ａ断面図。AA sectional drawing of FIG. 図１の要部拡大図。The principal part enlarged view of FIG. 第２実施形態に係る真空断熱材の要部拡大断面図。The principal part expanded sectional view of the vacuum heat insulating material which concerns on 2nd Embodiment.

（第１実施形態）
以下、図面に基づいて本発明の第１実施形態について説明する。 (First embodiment)
Hereinafter, a first embodiment of the present invention will be described based on the drawings.

本実施形態は、内部に貯蔵室７が形成された冷蔵庫本体１に真空断熱材１０を用いた冷蔵庫である。   The present embodiment is a refrigerator in which a vacuum heat insulating material 10 is used in a refrigerator body 1 in which a storage chamber 7 is formed.

具体的には、図１に示すように、冷蔵庫本体１は、冷蔵庫の筐体を構成するもので、鋼板製の外箱２と合成樹脂製の内箱３との間に形成された断熱空間４を備える。   Specifically, as shown in FIG. 1, the refrigerator main body 1 constitutes a housing of the refrigerator, and is a heat insulating space formed between a steel plate outer box 2 and a synthetic resin inner box 3. 4 is provided.

外箱２の断熱空間４側には、真空断熱材１０が放熱用の放熱パイプＰを挟んで接着固定されており、外箱２と内箱３との間隙にポリウレタンフォームからなる発泡断熱材５の原液を注入し発泡充填することで、外箱２の断熱空間４側に放熱パイプＰが配設され、放熱パイプＰの庫内側に真空断熱材１０が配設された状態で、外箱２及び内箱３が一体化される。   A vacuum heat insulating material 10 is bonded and fixed to the heat insulating space 4 side of the outer box 2 with a heat radiating pipe P interposed therebetween, and a foam heat insulating material 5 made of polyurethane foam is formed in the gap between the outer box 2 and the inner box 3. In the state where the heat radiating pipe P is disposed on the heat insulating space 4 side of the outer box 2 and the vacuum heat insulating material 10 is disposed on the inner side of the heat radiating pipe P, the outer case 2 is injected. And the inner box 3 is integrated.

真空断熱材１０は、図２に示すように、外箱２の左右側面の形状に合わせて、冷蔵庫本体１の上下方向に相当する辺部が長い矩形板状に成形されている。真空断熱材１０は、図３に示すように、芯材３０と、芯材３０を収納して内部を減圧状態で保持する外被材１４と、芯材３０の厚さ方向へ窪んだ凹溝２０、２２とを備える。   As shown in FIG. 2, the vacuum heat insulating material 10 is formed in a rectangular plate shape having long side portions corresponding to the vertical direction of the refrigerator body 1 according to the shape of the left and right side surfaces of the outer box 2. As shown in FIG. 3, the vacuum heat insulating material 10 includes a core material 30, a jacket material 14 that houses the core material 30 and holds the inside in a reduced pressure state, and a recessed groove that is recessed in the thickness direction of the core material 30. 20 and 22.

外被材１４は、複数のフィルムを積層したガスバリア性を有する積層フィルムからなる袋状の部材である。外被材１４は、例えば、外側から内側に向かって表面保護層とガスバリア層と熱溶着層とが順に積層された３層構造の積層フィルムからなる。表面保護層としては、例えば、ポリエチレンテレフタラートなどの比較的熱に強い合成樹脂で形成することができる。ガスバリア層は、例えば、金属蒸着物（例えばアルミを樹脂フィルム上に蒸着したアルミ蒸着物）、または金属箔（例えばアルミ箔）で形成することができる。熱溶着層としては、例えば、高密度ポリエチレン等の熱溶着性を有する合成樹脂で形成することができる。なお、外被材１４を構成する積層フィルムの構成は、ガスバリア性を有し、熱溶着可能であれば特に限定されない。なお、外被材１４の厚みは、芯材３０の厚みや凹溝２０、２２の深さ寸法に比べて薄いものであるが、説明を分かりやすくするため、図中において外被材１４の厚みを拡大して示している。   The jacket material 14 is a bag-like member made of a laminated film having a gas barrier property in which a plurality of films are laminated. The covering material 14 is made of, for example, a laminated film having a three-layer structure in which a surface protective layer, a gas barrier layer, and a heat welding layer are laminated in order from the outside toward the inside. The surface protective layer can be formed of a relatively heat-resistant synthetic resin such as polyethylene terephthalate. The gas barrier layer can be formed of, for example, a metal deposit (eg, an aluminum deposit obtained by depositing aluminum on a resin film) or a metal foil (eg, aluminum foil). As a heat welding layer, it can form with the synthetic resin which has heat welding property, such as a high density polyethylene, for example. In addition, the structure of the laminated | multilayer film which comprises the jacket material 14 will not be specifically limited if it has gas barrier property and can be heat-seal | fused. Although the thickness of the jacket material 14 is thinner than the thickness of the core material 30 and the depth dimension of the concave grooves 20 and 22, the thickness of the jacket material 14 in the drawing is easy to understand. Is shown enlarged.

凹溝２０、２２は、真空断熱材１０の一方の表面、具体的には外箱２に対向する一方の表面に設けられている。凹溝２０は、真空断熱材１０の長辺方向に沿って延びる真空断熱材１０の厚さ方向へ窪んだ凹部であり、本実施形態では、左右方向に間隔をあけて２本設けられている。図３に示すように、凹溝２０は、真空排気後の深さＤ１が放熱パイプＰの外径より大きく、外箱２との間で放熱パイプＰを配置する空間を形成する。凹溝２２は、真空断熱材１０の周縁に沿って延びる凹部であり、真空断熱材１０の外方に開口する断面Ｌ字状をなしている。凹溝２２の真空排気後の深さＤ２は、凹溝２０と同じ深さに設定されている。   The concave grooves 20 and 22 are provided on one surface of the vacuum heat insulating material 10, specifically, one surface facing the outer box 2. The concave groove 20 is a concave portion that is recessed in the thickness direction of the vacuum heat insulating material 10 that extends along the long side direction of the vacuum heat insulating material 10. In the present embodiment, two concave grooves 20 are provided at intervals in the left-right direction. . As shown in FIG. 3, the groove 20 has a depth D <b> 1 after evacuation larger than the outer diameter of the heat radiating pipe P, and forms a space in which the heat radiating pipe P is disposed with the outer box 2. The concave groove 22 is a concave portion extending along the peripheral edge of the vacuum heat insulating material 10 and has an L-shaped cross section that opens outward from the vacuum heat insulating material 10. The depth D2 of the recessed groove 22 after evacuation is set to the same depth as the recessed groove 20.

芯材３０は、外被材１４に対向して配置された一対の第１シート体３２、３３と、一対の第１シート体３２、３３の間に配置された第２シート体３４とを備える。一対の第１シート体３２、３３のうち、凹溝２０、２２が設けられ外箱２に対向して配置される一方の第１シート体３２の厚さＴ１は、発泡断熱材５に対向して配置される他方の第１シート体３３の厚さＴ２より肉厚に設けられている。   The core member 30 includes a pair of first sheet bodies 32 and 33 disposed so as to face the jacket material 14 and a second sheet body 34 disposed between the pair of first sheet bodies 32 and 33. . Of the pair of first sheet bodies 32, 33, the thickness T <b> 1 of one first sheet body 32 provided with the recessed grooves 20, 22 and facing the outer box 2 is opposed to the foam heat insulating material 5. The thickness of the other first sheet body 33 arranged in a thicker manner than the thickness T2 is provided.

第１シート体３２、３３及び第２シート体３４は、柔軟性を有する繊維集合体、例えば、繊維径が数μｍ程度のガラス繊維（グラスウール）をシート状に成形した繊維集合体からなる。第１シート体３２、３３は、第２シート体３４を構成する繊維集合体に比べて所定体積の繊維集合体に含まれる異物の重量比率が少ない繊維集合体からなる。   The first sheet bodies 32 and 33 and the second sheet body 34 are made of a fiber assembly having flexibility, for example, a fiber assembly in which glass fibers (glass wool) having a fiber diameter of about several μm are formed into a sheet shape. The first sheet bodies 32 and 33 are made of a fiber assembly in which the weight ratio of foreign matters contained in the fiber assembly having a predetermined volume is smaller than that of the fiber assembly constituting the second sheet body 34.

ここで、異物とは、第１シート体３２、３３及び第２シート体３４を構成する繊維集合体のうち繊維径や粒径の大きいショット（未繊維化粒状物）と呼ばれるものや、繊維集合体に混入した金属片などである。異物の重量比率は、繊維集合体を一定体積に切り出した試験片（例えば、一定厚みに設けられた第１シート体３２、３３及び第２シート体３４を１００ｍｍ角に切り出した試験片）をミキサーで粉砕し、ステンレス篩で５０μｍを越える粉砕片を異物として、試験片に対する異物の重量比率から測定することができる。   Here, the foreign matter refers to what is called a shot (non-fibrous granular material) having a large fiber diameter or particle size among fiber aggregates constituting the first sheet bodies 32 and 33 and the second sheet body 34, or fiber aggregates. It is a metal piece mixed in the body. The weight ratio of the foreign matter is a mixer of a test piece obtained by cutting a fiber assembly into a constant volume (for example, a test piece obtained by cutting out the first sheet bodies 32 and 33 and the second sheet body 34 provided at a constant thickness into 100 mm square). It can be measured from the weight ratio of the foreign matter to the test piece, with the crushed piece exceeding 50 μm as a foreign matter.

なお、第１シート体３２、３３及び第２シート体３４を構成する繊維集合体は、上記したガラス繊維以外にも、セラミック繊維やロックウール等の各種無機繊維や、ポリスチレンやポリエチレンテレフタレート、ポリプロピレン等からなる有機系樹脂繊維等を用いることができ、繊維径も１〜３０μｍ程度の繊維を用いることができる。   In addition, the fiber assembly which comprises the 1st sheet bodies 32 and 33 and the 2nd sheet body 34 other than the above-mentioned glass fiber, various inorganic fibers, such as ceramic fiber and rock wool, polystyrene, polyethylene terephthalate, polypropylene, etc. An organic resin fiber or the like made from the above can be used, and a fiber having a fiber diameter of about 1 to 30 μm can be used.

ここで真空断熱材１０の寸法の一例を挙げると、真空排気後において、凹溝２０の深さＤ１が４〜８ｍｍ、凹溝２２の深さＤ２が４〜８ｍｍ、凹溝２０が設けられた一方の第１シート体３２の厚さＴ１が６〜１４ｍｍ、発泡断熱材５に対向して配置される他方の第１シート体３３の厚さＴ２が４〜１２ｍｍ、凹溝２０及び凹溝２２の底部における第１シート体３２の厚さＴ３が２〜６ｍｍとすることができる。なお、第１シート体３２の厚さは、真空排気後において、いずれの位置においても少なくとも２ｍｍ以上であることが好ましい。   Here, as an example of the dimensions of the vacuum heat insulating material 10, the depth D1 of the concave groove 20 is 4 to 8 mm, the depth D2 of the concave groove 22 is 4 to 8 mm, and the concave groove 20 is provided after evacuation. The thickness T1 of one first sheet body 32 is 6 to 14 mm, the thickness T2 of the other first sheet body 33 arranged opposite to the foamed heat insulating material 5 is 4 to 12 mm, the recessed groove 20 and the recessed groove 22. The thickness T3 of the first sheet body 32 at the bottom of the sheet can be 2 to 6 mm. In addition, it is preferable that the thickness of the 1st sheet | seat body 32 is at least 2 mm or more in any position after evacuation.

このような構成の真空断熱材１０は、図４に示すように、他方の第１シート体３３に比べて肉厚に設けられた一方の第１シート体３２が外被材１４を介して外箱２と対向するように配置され、一方の第１シート体３２に対向する外被材１４の表面に接着剤が塗布され外箱２に接着固定される。   As shown in FIG. 4, the vacuum heat insulating material 10 having such a configuration has one first sheet body 32 provided thicker than the other first sheet body 33, with the outer cover material 14 interposed therebetween. An adhesive is applied to the surface of the outer cover material 14 that is disposed so as to face the box 2 and faces one of the first sheet bodies 32, and is bonded and fixed to the outer box 2.

次に、上記した真空断熱材１０の製造方法について説明する。   Next, the manufacturing method of the above-described vacuum heat insulating material 10 will be described.

まず、真空断熱材１０の形状に応じた所定のシート状にガラス繊維を成形して第１シート体３２，３３及び第２シート体３４を作製する。   First, glass fibers are formed into a predetermined sheet shape corresponding to the shape of the vacuum heat insulating material 10 to produce the first sheet bodies 32 and 33 and the second sheet body 34.

具体的には、第１シート体３２，３３は、例えば遠心法や火炎法などで製造されたガラス繊維に対して異物を除去する工程を行い、異物を除去したガラス繊維を用いて作製される。第２シート体３４は、例えば遠心法や火炎法などで製造された後、異物を除去する工程を行っていないガラス繊維を用いて作製される。   Specifically, the first sheet bodies 32 and 33 are produced using glass fibers from which foreign substances have been removed by performing a step of removing foreign substances on glass fibers manufactured by, for example, a centrifugal method or a flame method. . The second sheet body 34 is manufactured using glass fibers that have been manufactured by, for example, a centrifugal method or a flame method and have not been subjected to a step of removing foreign matter.

なお、製造されたガラス繊維から異物を除去する方法は、特に限定されず、例えば、ガラス繊維を水中において撹拌することでガラス繊維より比重の大きい異物を分離することで行うことができる。   In addition, the method of removing a foreign material from the manufactured glass fiber is not specifically limited, For example, it can carry out by isolate | separating the foreign material with larger specific gravity than glass fiber by stirring glass fiber in water.

次いで、得られた一対の第１シート体３２、３３の間に第２シート体３４を配置して芯材３０を形成する。なお、ニードリングなどの固定手段によって第１シート体３２、３３及び第２シート体３４を固定してもよい。   Next, the second sheet body 34 is disposed between the obtained pair of first sheet bodies 32 and 33 to form the core material 30. The first sheet bodies 32 and 33 and the second sheet body 34 may be fixed by fixing means such as needling.

次いで、得られた芯材３０を袋状の外被材１４の内部に収納する。一対の第１シート体３２、３３が芯材３０の外側面を構成しているため、芯材３０を外被材１４に収納すると第１シート体３２、３３が外被材１４と対向して配置される。   Next, the obtained core material 30 is accommodated in the bag-shaped outer covering material 14. Since the pair of first sheet bodies 32, 33 constitute the outer surface of the core material 30, the first sheet bodies 32, 33 face the jacket material 14 when the core material 30 is stored in the jacket material 14. Be placed.

そして、減圧ポンプ等によって外被材１４の内部を真空排気して減圧し、減圧状態を維持したまま外被材１４を熱溶着などによって封止する。これにより、凹溝２０、２２が形成されていない平板状の真空断熱材１０が得られる。   Then, the inside of the jacket material 14 is evacuated and decompressed by a decompression pump or the like, and the jacket material 14 is sealed by heat welding or the like while maintaining the reduced pressure state. Thereby, the flat vacuum heat insulating material 10 in which the concave grooves 20 and 22 are not formed is obtained.

次いで、内部を減圧した状態で封止した真空断熱材１０を外被材１４の外表面から不図示のプレス装置によって圧縮することで、一対の第１シート体３２，３３の一方の第１シート体３２に凹溝２０、２２を形成して真空断熱材１０を得る。なお、凹溝２０、２２は、プレス装置による圧縮以外にも、例えば、押圧ローラによって芯材３０を圧縮して凹溝２０、２２を備える真空断熱材１０を製造してもよい。   Next, the vacuum heat insulating material 10 sealed in a state where the inside is decompressed is compressed from the outer surface of the jacket material 14 by a pressing device (not shown), so that one first sheet of the pair of first sheet bodies 32 and 33 is formed. The grooves 20 and 22 are formed in the body 32 to obtain the vacuum heat insulating material 10. In addition to the compression by a press apparatus, the concave grooves 20 and 22 may manufacture the vacuum heat insulating material 10 provided with the concave grooves 20 and 22 by compressing the core material 30 with a pressing roller, for example.

以上のような本実施形態の真空断熱材１０では、外被材１４に対向して配置された一対の第１シート体３２，３３が、第２シート体３４に比べて所定体積の繊維集合体に含まれる異物の重量比率が少ないため、異物による外被材１４の損傷を抑えることができ、長期にわたって外被材１４内部の真空状態に保持して断熱性能を維持することができる。   In the vacuum heat insulating material 10 according to the present embodiment as described above, the pair of first sheet bodies 32 and 33 arranged to face the jacket material 14 is a fiber assembly having a predetermined volume compared to the second sheet body 34. Since the weight ratio of the foreign matter contained in is small, damage to the jacket material 14 due to the foreign matter can be suppressed, and heat insulation performance can be maintained by maintaining the vacuum state inside the jacket material 14 for a long period of time.

また、一対の第１シート体３２，３３の間に配された第２シート体３４には、異物を除去する工程を行っていないガラス繊維を用いることができるため、安価に製造することができる。   Moreover, since the glass fiber which has not performed the process which removes a foreign material can be used for the 2nd sheet | seat body 34 distribute | arranged between a pair of 1st sheet | seat bodies 32 and 33, it can manufacture cheaply. .

また、第１シート体３２、３３は、異物を除去する工程において繊維が分散されその表面が平滑になり、真空断熱材１０の外表面を構成する外被材１４の表面も平滑になる。そのため、真空断熱材１０の外表面の濡れ性が高まり、真空断熱材１０の接着強度を高めることができる。   Further, in the first sheet bodies 32 and 33, the fibers are dispersed in the step of removing the foreign matter, the surface thereof becomes smooth, and the surface of the jacket material 14 constituting the outer surface of the vacuum heat insulating material 10 becomes smooth. Therefore, the wettability of the outer surface of the vacuum heat insulating material 10 is increased, and the adhesive strength of the vacuum heat insulating material 10 can be increased.

しかも、本実施形態の真空断熱材１０では、外被材１４に対向して配置された一対の第１シート体３２，３３の一方の第１シート体３２の厚さＴ１が他方の第１シート体３３の厚さＴ２より肉厚に設けられている。肉厚に設けられた一方の第１シート体３２の表面は、第２シート体３４の表面状態の影響を受けにくく他方の第１シート体３３の表面に比べてより平滑な面となるため、強固に真空断熱材１０を接着固定することができる。   In addition, in the vacuum heat insulating material 10 of the present embodiment, the thickness T1 of one first sheet body 32 of the pair of first sheet bodies 32 and 33 disposed to face the outer cover material 14 is the other first sheet. The body 33 is thicker than the thickness T2. Since the surface of one first sheet body 32 provided with a wall thickness is less affected by the surface state of the second sheet body 34 and becomes a smoother surface than the surface of the other first sheet body 33, The vacuum heat insulating material 10 can be firmly bonded and fixed.

また、本実施形態の真空断熱材１０では、肉厚に設けられた一方の第１シート体３２に凹溝２０、２２が設けられているため、凹溝２０及び凹溝２２の底部において第１シート体３２の厚さを確保して外被材１４の損傷を抑えることができる。   Moreover, in the vacuum heat insulating material 10 of this embodiment, since the recessed grooves 20 and 22 are provided in the one 1st sheet body 32 provided in thickness, it is the 1st in the bottom part of the recessed groove 20 and the recessed groove 22. It is possible to secure the thickness of the sheet body 32 and suppress damage to the jacket material 14.

（第２実施形態）
次に第２実施形態について、図５を参照して説明する。なお、第１実施形態と同一の構成のものについては同一の符号を付し、その構成の説明を省略する。 (Second Embodiment)
Next, a second embodiment will be described with reference to FIG. In addition, the same code | symbol is attached | subjected about the thing of the same structure as 1st Embodiment, and description of the structure is abbreviate | omitted.

本実施形態の真空断熱材１１０は、一方の第１シート体１３２の一部が間引かれ、芯材３０の厚さ方向へ窪んだ凹溝２０，２２が設けられている。   In the vacuum heat insulating material 110 of this embodiment, a part of one first sheet body 132 is thinned out, and concave grooves 20 and 22 that are recessed in the thickness direction of the core material 30 are provided.

具体的には、図５に示すように、真空断熱材１１０の芯材３０を構成する第１シート体１３２、３３の一方の第１シート体１３２は、第２シート体３４の一方面の全体を覆うように配置された平板状のベース部１３２ａと、ベース部１３２ａから突出する複数の陸部１３２ｂとを備え、複数の陸部１３２ｂの間に凹溝２０，２２が区画形成されている。   Specifically, as shown in FIG. 5, one first sheet body 132 of the first sheet bodies 132 and 33 constituting the core member 30 of the vacuum heat insulating material 110 is the entire one surface of the second sheet body 34. And a plurality of land portions 132b protruding from the base portion 132a, and the grooves 20 and 22 are defined between the plurality of land portions 132b.

本実施形態の真空断熱材１１０では、凹溝２０，２２の位置において一方の第１シート体１３２が間引かれているため、凹溝２０、２２を形成するために必要な真空断熱材１０を圧縮する圧力を抑えることができ、外被材１４の損傷を抑えることができる。   In the vacuum heat insulating material 110 of the present embodiment, one of the first sheet bodies 132 is thinned out at the positions of the concave grooves 20 and 22, and therefore the vacuum heat insulating material 10 necessary for forming the concave grooves 20 and 22 is provided. The pressure to compress can be suppressed, and damage to the jacket material 14 can be suppressed.

（他の実施形態）
以上、本発明の実施形態を説明したが、これらの実施形態は例として提示したものであり、発明の範囲を限定することを意図していない。これらの実施形態は、その他の様々な形態で実施されることが可能であり、発明の趣旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これらの実施形態やその変形は、発明の範囲や要旨に含まれると同様に、特許請求の範囲に記載された発明とその均等の範囲に含まれるものである。 (Other embodiments)
As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

１…冷蔵庫本体、２…外箱、３…内箱、４…断熱空間、５…発泡断熱材、１０…真空断熱材、１４…外被材、２０…凹溝、２２…凹溝、３０…芯材、３２…第１シート体、３３…第１シート体、３４…第２シート体、Ｐ…放熱パイプ DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body, 2 ... Outer box, 3 ... Inner box, 4 ... Heat insulation space, 5 ... Foam heat insulation material, 10 ... Vacuum heat insulation material, 14 ... Cover material, 20 ... Concave groove, 22 ... Concave groove, 30 ... Core material 32... First sheet body 33. First sheet body 34. Second sheet body P P. Radiating pipe

Claims (5)

芯材と、前記芯材を収納して内部を減圧状態で保持する外被材とを備えた真空断熱材において、
前記芯材は、繊維集合体からなり前記外被材に対向して配置された一対の第１シート体と、繊維集合体からなり前記第１シート体の間に配置された第２シート体とを備え、前記第１シート体は、所定体積の繊維集合体に含まれる異物の重量比率が前記第２シート体より少ない真空断熱材。 In a vacuum heat insulating material provided with a core material and a jacket material that stores the core material and holds the inside in a reduced pressure state,
The core material is a pair of first sheet bodies made of a fiber assembly and disposed opposite to the jacket material, and a second sheet body made of a fiber assembly and disposed between the first sheet bodies. The first sheet body is a vacuum heat insulating material in which the weight ratio of the foreign matter contained in the fiber assembly having a predetermined volume is smaller than that of the second sheet body. 一対の前記第１シート体は、厚さが異なる請求項１に記載の真空断熱材。   A pair of said 1st sheet | seat bodies are vacuum heat insulating materials of Claim 1 from which thickness differs. 一対の前記第１シート体の一方は、前記外被材との接触面から厚さ方向へ窪んだ凹溝を備え、他方の前記第１シート体に比べて厚さが厚い請求項２に記載の真空断熱材。   The one of a pair of said 1st sheet | seat body is provided with the ditch | groove recessed in the thickness direction from the contact surface with the said jacket material, and thickness is thick compared with the said other 1st sheet | seat body. Vacuum insulation material. 外箱と内箱との間に真空断熱材が配設された冷蔵庫において、
前記真空断熱材は、芯材と、前記芯材を収納して内部を減圧状態で保持する外被材とを備え、
前記芯材は、繊維集合体からなり前記外被材に対向して配置された一対の第１シート体と、繊維集合体からなり前記第１シート体の間に配置された第２シート体とを備え、前記第１シート体は、所定体積の繊維集合体に含まれる異物の重量比率が前記第２シート体より少ない冷蔵庫。 In the refrigerator in which a vacuum heat insulating material is disposed between the outer box and the inner box,
The vacuum heat insulating material includes a core material, and a jacket material that stores the core material and holds the inside in a reduced pressure state,
The core material is a pair of first sheet bodies made of a fiber assembly and disposed opposite to the jacket material, and a second sheet body made of a fiber assembly and disposed between the first sheet bodies. The first sheet body is a refrigerator in which the weight ratio of foreign substances contained in a fiber assembly having a predetermined volume is smaller than that of the second sheet body. 前記真空断熱材は、前記外箱に接着固定され、
前記外箱に対向する一方の前記第１シート体が、他方の前記第１シート体に比べて厚さが厚い請求項４に記載の冷蔵庫。 The vacuum heat insulating material is bonded and fixed to the outer box,
The refrigerator according to claim 4, wherein one of the first sheet bodies facing the outer box is thicker than the other first sheet body.
JP2018054838A 2018-03-22 2018-03-22 Vacuum heat insulating material and refrigerator using vacuum heat insulating material Pending JP2019168001A (en)

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