JP3488229B2 - Insulated box and refrigerator - Google Patents
Insulated box and refrigeratorInfo
- Publication number
- JP3488229B2 JP3488229B2 JP2002159106A JP2002159106A JP3488229B2 JP 3488229 B2 JP3488229 B2 JP 3488229B2 JP 2002159106 A JP2002159106 A JP 2002159106A JP 2002159106 A JP2002159106 A JP 2002159106A JP 3488229 B2 JP3488229 B2 JP 3488229B2
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- box
- insulating material
- vacuum
- vacuum heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、硬質ウレタンフォ
ームと真空断熱材とからなる断熱箱体および前記断熱箱
体を適用した冷蔵庫に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating box made of hard urethane foam and a vacuum heat insulating material, and a refrigerator to which the heat-insulating box is applied.
【０００２】[0002]
【従来の技術】近年、地球環境保護が大きく叫ばれるな
か、家電製品の省エネルギー化は、緊急に取り組むべき
重要課題となってきている。この解決方法の一つとし
て、無駄な熱の授受を防ぐ目的で断熱材の適用や断熱材
の高性能化が種々検討されている。2. Description of the Related Art In recent years, with the great demand for protection of the global environment, energy saving of home electric appliances has become an important issue to be urgently addressed. As one of the solutions to this problem, various studies have been conducted on the application of a heat insulating material and the performance improvement of the heat insulating material for the purpose of preventing the transfer of wasteful heat.
【０００３】断熱材の高性能化の一例としては、特公平
２−５４４７９号公報に開示されているように、多孔質
構造の芯材をアルミ箔ラミネートフィルム製の外被材で
覆って内部を減圧封止する真空断熱材がある。このよう
な真空断熱材は、従来グラスウールや従来硬質ウレタン
フォームと比較して３倍〜６倍程度の優れた断熱性能を
有するものであり、各種製品に適用されている。As an example of improving the performance of a heat insulating material, as disclosed in Japanese Examined Patent Publication No. 2-54479, a core material having a porous structure is covered with an outer covering material made of an aluminum foil laminated film to cover the inside. There is a vacuum insulation material that is vacuum-sealed. Such a vacuum heat insulating material has excellent heat insulating performance of about 3 to 6 times that of conventional glass wool and conventional hard urethane foam, and is applied to various products.
【０００４】また、このような真空断熱材を家電製品で
ある冷蔵庫に適用した例としては、特開平１０−２０５
９９５号公報に開示されているように、鉄板製の外箱
と、ＡＢＳ樹脂からなる内箱と、前記外箱と前記内箱に
よって形成される空間に充填された発泡断熱材とからな
る断熱壁において、断熱壁内面に、あらかじめ真空断熱
材を貼り付け、発泡断熱材と共に一体構造体とする方法
により適用するものであり、真空断熱材を冷凍室の両側
と背面側に配設することにより、消費電力量を効率的に
低減できるというものである。An example of applying such a vacuum heat insulating material to a refrigerator, which is a home electric appliance, is disclosed in Japanese Patent Laid-Open No. 10-205.
As disclosed in Japanese Patent Publication No. 995, a heat insulating wall made of an outer box made of an iron plate, an inner box made of ABS resin, and a foamed heat insulating material filled in a space formed by the outer box and the inner box. In, the inner surface of the heat insulating wall, a vacuum heat insulating material is pasted in advance, and it is applied by a method of forming an integral structure together with the foam heat insulating material.By arranging the vacuum heat insulating material on both sides and the back side of the freezing chamber, The power consumption can be effectively reduced.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、冷蔵庫
においては、省エネルギーの要請が高まるにつれて、真
空断熱材の使用面積、すなわち断熱箱体の外箱表面積に
対する真空断熱材の使用面積との比である被覆率を大き
くして断熱箱体の断熱性能を向上させていくことが必用
となってきている。However, in the refrigerator, as the demand for energy saving increases, the coating area, which is the ratio of the use area of the vacuum heat insulating material, that is, the ratio of the use area of the vacuum heat insulating material to the surface area of the outer box of the heat insulating box. It is necessary to increase the rate to improve the heat insulation performance of the heat insulation box.
【０００６】従来のように被覆率が３０％程度であれば
影響は小さいが、それ以上に被覆率を高めると、構造体
としての断熱箱体の強度が著しく低下するという問題が
あった。すなわち、断熱箱体は、外箱と内箱との空間部
に充填された硬質ウレタンフォームが、外箱と内箱とに
接着一体化されることにより、箱体の構造強度を発現し
ているが、異物の真空断熱材が断熱壁の内表面の多くを
占有すること、かつ硬質ウレタンフォーム自身の厚みが
薄くなるため、従来の材料構成では断熱箱体が歪んだり
変形するという問題が生じている。As in the prior art, if the coverage is about 30%, the effect is small, but if the coverage is further increased, there is a problem that the strength of the heat insulating box as a structure is significantly lowered. That is, in the heat insulating box, the rigid urethane foam filled in the space between the outer box and the inner box is adhesively integrated with the outer box and the inner box, thereby expressing the structural strength of the box. However, since the foreign material vacuum heat insulating material occupies much of the inner surface of the heat insulating wall, and the thickness of the rigid urethane foam itself becomes thin, the problem that the heat insulating box body is distorted or deformed occurs in the conventional material configuration. There is.
【０００７】特に、断熱箱体のドア枚数が増えると、断
熱箱体のわずかな歪みによってドアのしまりが悪くな
り、ガスケット部の隙間空きによる気密性の低下から断
熱性能が悪化するという問題が発生する。In particular, when the number of doors of the heat insulating box increases, a slight distortion of the heat insulating box deteriorates the tightness of the door, and there is a problem in that the heat insulation performance is deteriorated due to the decrease in airtightness due to the gap in the gasket portion. To do.
【０００８】このため、一般的には硬質ウレタンフォー
ムの密度を大幅に高くして、硬質ウレタンフォームの剛
性を高める。すなわち硬質ウレタンフォームの曲げ弾性
率を大きくして適用する方法があるが、密度を大幅に高
めると固体熱伝導が悪化し硬質ウレタンフォームの熱伝
導率が極端に悪化することから、本来の狙いである断熱
箱体の高断熱化が達成されなくなるという重大な問題が
生じる。Therefore, in general, the density of the rigid urethane foam is greatly increased to increase the rigidity of the rigid urethane foam. That is, there is a method of applying by increasing the flexural modulus of the rigid urethane foam, but if the density is greatly increased, the solid thermal conductivity will deteriorate and the thermal conductivity of the rigid urethane foam will deteriorate extremely, so the original aim is There is a serious problem that the high heat insulation of a certain heat insulation box cannot be achieved.
【０００９】更に、真空断熱材自体の断熱性能が充分で
ない場合には、上述した複層断熱層のウレタン部分の断
熱性能低下と相まって、真空断熱材の被覆率を高めても
充分な省エネルギー効果を得ることが困難になるという
問題があった。Furthermore, when the heat insulating performance of the vacuum heat insulating material itself is not sufficient, a sufficient energy saving effect can be obtained even if the coverage of the vacuum heat insulating material is increased in combination with the above-mentioned deterioration of the heat insulating performance of the urethane portion of the multilayer heat insulating layer. There was a problem that it would be difficult to obtain.
【００１０】本発明は、上記課題に鑑み、真空断熱材の
被覆率を高めた場合にも、箱体強度として問題なく、か
つ高断熱性能の断熱箱体を供給すると共に、消費電力量
の少ない冷蔵庫を提供するものである。In view of the above-mentioned problems, the present invention provides a heat-insulating box having high box insulation strength and high heat insulation performance even when the coverage of the vacuum heat insulating material is increased, and consumes less power. It provides a refrigerator.
【００１１】[0011]
【課題を解決するための手段】本発明の請求項１に係る
断熱箱体は、内箱と外箱とから形成される空間に真空断
熱材を配設し硬質ウレタンフォームを一体発泡した複層
構造の断熱箱体において、前記真空断熱材は、断熱箱体
の両側面，天面，背面，底面およびドア面の各面に配設
され、芯材が無機繊維集合体よりなり、前記無機繊維集
合体をバインダーで結着し、かつ密度を１５０ｋｇ／ｍ
3 以上とすることにより曲げ弾性率を３０ＭＰａ以上と
した真空断熱材であり、前記硬質ウレタンフォームは、
密度を６０ｋｇ／ｍ3以下とした硬質ウレタンフォーム
であって、前記硬質ウレタンフォームによる剛性強化を
断熱性低下のない密度範囲に抑えながら、前記真空断熱
材の曲げ弾性率を強化することによって複層構造の箱体
強度を高めたものである。According to a first aspect of the present invention, there is provided a heat-insulating box body, which is vacuum cut into a space formed by an inner box and an outer box.
A multi-layered structure in which heat material is arranged and rigid urethane foam is integrally foamed
In a heat insulating box having a structure, the vacuum heat insulating material is a heat insulating box.
Arranged on both sides, top, back, bottom and door surface
And the core material is made of an inorganic fiber aggregate,
The united body is bound with a binder, and the density is 150 kg / m.
It is a vacuum heat insulating material having a bending elastic modulus of 30 MPa or more by setting it to 3 or more, and the rigid urethane foam is
Rigid urethane foam with a density of 60 kg / m 3 or less
Therefore, strengthening the rigidity by the rigid urethane foam
While keeping the density within the range that does not deteriorate the heat insulation,
Box with multi-layer structure by strengthening bending elastic modulus of material
It has increased strength .
【００１２】よって、真空断熱材の曲げ弾性率が、硬質
ウレタンフォームの曲げ弾性率を大幅に上回る３０ＭＰ
ａ以上を有しているため、真空断熱材を複層することに
よって生じる箱体強度の低下はなく、収納物の重量に耐
えきれず箱体が変形するなどの問題はない。Therefore, the flexural modulus of the vacuum heat insulating material is much higher than that of the rigid urethane foam at 30MP.
Since it has a or more, there is no decrease in the strength of the box body caused by stacking multiple layers of the vacuum heat insulating material, and there is no problem that the box body is deformed because it cannot bear the weight of the stored items.
【００１３】 また、真空断熱材の芯材の密度が１５０
ｋｇ／ｍ 3 以上であるため、真空断熱材の曲げ弾性率は
容易に３０ＭＰａ以上が得られる。加えて、剛性アップ
とウレタン充填性確保のため硬質ウレタンフォームの密
度を高くしているが、密度を６０ｋｇ／ｍ3以下として
いるため、固体熱伝導率の増大の影響による断熱性能の
低下もない。更には、真空断熱材の芯材に使用する無機
繊維集合体は、各繊維間の伝熱抵抗が大きいことから固
体熱伝導率が小さく、芯材の密度を増大しても熱伝導率
への影響は軽微であり、芯材の密度増大により容易に曲
げ弾性率を増大することが可能である。よって、真空断
熱材は、熱伝導率を悪化させることなく、曲げ弾性率を
容易に３０ＭＰａ以上とすることが可能となる。更に
は、この無機繊維集合体をバインダーで結着すると、よ
り一層、真空断熱材の曲げ弾性率は増大する。よって、
真空断熱材は、熱伝導率を悪化させることなく、曲げ弾
性率を容易に３０ＭＰａ以上とすることが可能となる。
よって、真空断熱材を多量に使用しても断熱箱体の品質
としては問題なく、優れた断熱性能によって省エネルギ
ー化が実現できるのである。 The density of the core material of the vacuum heat insulating material is 150
Since it is more than kg / m 3 , the flexural modulus of vacuum insulation is
30 MPa or more can be easily obtained. In addition, although the density of the rigid urethane foam is increased in order to increase the rigidity and secure the urethane filling property, since the density is 60 kg / m3 or less, there is no deterioration in the heat insulation performance due to the influence of the increase in the solid thermal conductivity. Furthermore, the inorganic material used for the core material of vacuum insulation
The fiber assembly is solid because the heat transfer resistance between each fiber is large.
Body thermal conductivity is low, and even if the density of the core material is increased, the thermal conductivity
The impact on the core material is minimal and the core material is easily bent due to the increased density.
It is possible to increase the elastic modulus. Therefore, the vacuum break
The thermal material has a flexural modulus without deteriorating the thermal conductivity.
It is possible to easily set the pressure to 30 MPa or more. Further
When this inorganic fiber aggregate is bound with a binder,
Further, the flexural modulus of the vacuum heat insulating material increases. Therefore,
The vacuum insulation material can bend without damaging the thermal conductivity.
The sex ratio can be easily set to 30 MPa or more.
Therefore, even if a large amount of vacuum heat insulating material is used, there is no problem in the quality of the heat insulating box body, and energy saving can be realized by excellent heat insulating performance.
【００１４】本発明の請求項２に係る断熱箱体は、真空
断熱材の被覆率が外箱表面積の４０％を越えてなるもの
である。According to a second aspect of the present invention, the heat-insulating box has a vacuum heat-insulating material covering more than 40% of the surface area of the outer box.
【００１５】よって、真空断熱材の被覆率が、外箱表面
積の４０％を越えてなるものであっても、真空断熱材の
曲げ弾性率が、硬質ウレタンフォームの曲げ弾性率を大
幅に上回る３０ＭＰａ以上を有しているため、真空断熱
材を複層することによって生じる箱体強度の低下はな
く、収納物の重量に耐えきれず箱体が変形するなどの問
題はない。Therefore, even if the coverage of the vacuum heat insulating material exceeds 40% of the surface area of the outer box, the bending elastic modulus of the vacuum heat insulating material is significantly higher than that of the rigid urethane foam at 30 MPa. Because of the above, there is no decrease in the strength of the box that occurs due to multiple layers of the vacuum heat insulating material, and there is no problem that the box cannot be deformed because it cannot bear the weight of the stored items.
【００１６】加えて、剛性アップとウレタン充填性確保
のため硬質ウレタンフォームの密度を高くしているが、
密度を６０ｋｇ／ｍ3以下としているため、固体熱伝導
率の増大の影響による断熱性能の低下はない。更には、
真空断熱材の被覆率が、外箱表面積の４０％を越えてな
る断熱箱体であるためその省エネルギー効率はより優れ
たものとなり、効率的に省エネルギー化が実現できるの
である。In addition, the density of the rigid urethane foam is increased to increase the rigidity and ensure the urethane filling property.
Since the density is 60 kg / m 3 or less, there is no deterioration in the heat insulation performance due to the influence of the increase in solid thermal conductivity. Furthermore,
Since the coverage rate of the vacuum heat insulating material exceeds 40% of the surface area of the outer box, the energy saving efficiency is further improved and the energy saving can be realized efficiently.
【００１７】本発明の請求項３に係る断熱箱体は、真空
断熱材の被覆率が外箱表面積の３０％を越え、かつドア
を３つ以上有するものである。According to a third aspect of the present invention, the heat insulating box body has a vacuum heat insulating material coverage of more than 30% of the surface area of the outer box and has three or more doors.
【００１８】よって、真空断熱材の被覆率が、外箱表面
積の３０％を越え、かつドアを３つ以上有するものであ
っても、真空断熱材の曲げ弾性率が硬質ウレタンフォー
ムの曲げ弾性率を大幅に上回る３０ＭＰａ以上を有して
いるため、真空断熱材を複層することによって生じる箱
体強度の低下はなく、収納物の重量に耐えきれず箱体が
変形するなどの問題はない。特に、箱体剛性が必用とな
るドア枚数３枚以上の場合でも、箱体の歪みや変形は生
じない。Therefore, even if the coverage of the vacuum heat insulating material exceeds 30% of the surface area of the outer box and has three or more doors, the bending elastic modulus of the vacuum heat insulating material is that of the rigid urethane foam. Since it has a pressure of 30 MPa or more, which is significantly higher than the above, there is no decrease in the strength of the box that occurs due to multiple layers of the vacuum heat insulating material, and there is no problem such that the box cannot deform to the weight of the stored items and the box deforms. In particular, even when the number of doors is 3 or more, which requires box rigidity, the box is not distorted or deformed.
【００１９】加えて、剛性アップとウレタン充填性確保
のため硬質ウレタンフォームの密度を高くしているが、
密度を６０ｋｇ／ｍ3以下としているため、固体熱伝導
率の増大の影響による断熱性能の低下はない。よって真
空断熱材を多量に使用しても断熱箱体の品質としては問
題なく、優れた断熱性能によって省エネルギー化が実現
できるのである。In addition, the density of the rigid urethane foam is increased to increase the rigidity and ensure the urethane filling property.
Since the density is 60 kg / m 3 or less, there is no deterioration in the heat insulation performance due to the influence of the increase in solid thermal conductivity. Therefore, even if a large amount of vacuum heat insulating material is used, there is no problem in the quality of the heat insulating box body, and energy saving can be realized by excellent heat insulating performance.
【００２０】[0020]
【００２１】[0021]
【００２２】[0022]
【００２３】[0023]
【００２４】[0024]
【００２５】[0025]
【００２６】[0026]
【００２７】[0027]
【００２８】[0028]
【００２９】[0029]
【００３０】[0030]
【００３１】[0031]
【００３２】[0032]
【００３３】[0033]
【００３４】[0034]
【００３５】 本発明の請求項４に係る冷蔵庫は、請求
項１から請求項３のうちのいずれか一項記載の断熱箱体
と、前記断熱箱体内に形成される冷却室と、前記冷却室
を冷却する冷却装置よりなるものである。A refrigerator according to claim 4 of the present invention is the heat-insulating box body according to any one of claims 1 to 3 , a cooling chamber formed in the heat-insulating box body, and the cooling chamber. It comprises a cooling device for cooling the.
【００３６】よって、外箱表面積に対して真空断熱材の
被覆率が高い断熱箱体を合理的に実現した冷蔵庫とな
り、優れた断熱性能の断熱箱体によって冷蔵庫の消費電
力量を効率的に削減できると共に、内容積効率が高く、
省スペース化の要求にも応えることができる。Thus, the refrigerator has a rational realization of a heat insulating box having a high vacuum insulating material coverage with respect to the surface area of the outer box, and the heat insulating box having excellent heat insulating performance efficiently reduces the power consumption of the refrigerator. It is possible, and the internal volume efficiency is high,
It is possible to meet the demand for space saving.
【００３７】また、優れた断熱性能を有する断熱箱体
は、真空断熱材を多量に使用しているが、真空断熱材の
曲げ弾性率が、硬質ウレタンフォームの曲げ弾性率を大
幅に上回る３０ＭＰａ以上を有しているため、真空断熱
材を複層することによって生じる箱体強度の低下はな
く、収納物の重量に耐えきれず箱体が変形するなどの問
題のない優れた品質を有している。Further, the heat insulating box having excellent heat insulating performance uses a large amount of vacuum heat insulating material, but the bending elastic modulus of the vacuum heat insulating material is 30 MPa or more, which greatly exceeds the bending elastic modulus of the rigid urethane foam. Therefore, there is no decrease in box strength caused by stacking multiple layers of vacuum heat insulating material, and it has excellent quality with no problems such as deformation of the box because it cannot bear the weight of the stored items. There is.
【００３８】[0038]
【発明の実施の形態】以下、本発明による断熱箱体およ
び冷蔵庫の実施の形態について説明するが、本発明はこ
れに限定されるものではない。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a heat insulating box and a refrigerator according to the present invention will be described below, but the present invention is not limited thereto.
【００３９】（実施の形態１）本発明の実施の形態１に
おける一実施例の断熱箱体を図１に示す。１は断熱箱体
で、合成樹脂からなる内箱２と金属からなる外箱３とか
ら形成される空間４に硬質ウレタンフォーム５と真空断
熱材６が複層構造で配設されている。断熱箱体の製造に
あたっては、真空断熱材６をあらかじめ外箱３にホット
メルト等の接着剤により接着固定し、硬質ウレタンフォ
ーム５の原料を注入して一体発泡を行う。なお、真空断
熱材６は、外箱２の表面積の７０％を占めて配設してい
る。(Embodiment 1) FIG. 1 shows a heat insulating box according to an embodiment of the present invention. Reference numeral 1 denotes a heat insulating box, in which a hard urethane foam 5 and a vacuum heat insulating material 6 are arranged in a multi-layer structure in a space 4 formed by an inner box 2 made of synthetic resin and an outer box 3 made of metal. In manufacturing the heat insulating box, the vacuum heat insulating material 6 is bonded and fixed to the outer box 3 in advance with an adhesive such as hot melt, and the raw material of the hard urethane foam 5 is injected to perform integral foaming. The vacuum heat insulating material 6 is disposed so as to occupy 70% of the surface area of the outer box 2.
【００４０】真空断熱材６は、密度２００ｋｇ／ｍ
3で、曲げ弾性率は４５ＭＰａであった。このとき、真
空断熱材の熱伝導率は、平均温度２４℃で測定したとこ
ろ、０．００３Ｗ／ｍＫであった。The vacuum heat insulating material 6 has a density of 200 kg / m.
At 3 , the flexural modulus was 45 MPa. At this time, the thermal conductivity of the vacuum heat insulating material was 0.003 W / mK when measured at an average temperature of 24 ° C.
【００４１】一方、硬質ウレタンフォームは、密度４５
ｋｇ／ｍ3で、曲げ弾性率は７ＭＰａであった。このと
き、硬質ウレタンフォームの熱伝導率は０．０２１Ｗ／
ｍＫであった。On the other hand, the rigid urethane foam has a density of 45.
The flexural modulus was 7 MPa at kg / m 3 . At this time, the thermal conductivity of the rigid urethane foam is 0.021 W /
It was mK.
【００４２】このあと、断熱箱体１に収納棚などの部品
（図示せず）や冷却装置（図示せず）を組み込んで冷蔵
庫（図示せず）を完成させる。前記冷蔵庫により、冷蔵
庫筐体の全体冷却テストおよび収納棚に食品を収納させ
たときの加重と繰り返してのドア開閉テストによる筐体
の変形を、ドアの取り付け位置からのズレと、ドア部と
フランジとの隙間とをもとに評価したが、ドアの取り付
け位置からのズレやドア部とフランジ部の隙間は発生せ
ず、問題のない箱体品質を確保していることが判った
（表１に示す）。また、真空断熱材の密度が１５０ｋｇ
／ｍ3以上あれば、箱体の剛性強度や断熱性能は一層良
好なものとなることが判った。After that, the refrigerator (not shown) is completed by incorporating components (not shown) such as a storage shelf and a cooling device (not shown) in the heat insulating box 1. With the above refrigerator, deformation of the housing due to the entire cooling test of the refrigerator housing and the load when the food is stored in the storage shelf and the repeated door opening and closing test are caused by the displacement from the door mounting position, the door portion and the flange. The evaluation was based on the gap between the door and the mounting position of the door and the gap between the door and the flange did not occur, and it was found that a box quality without problems was secured (Table 1 Shown in). Also, the density of the vacuum insulation material is 150 kg.
It was found that the rigidity strength and heat insulation performance of the box body were further improved if the value was / m 3 or more.
【００４３】[0043]
【表１】
一方、真空断熱材の曲げ弾性率が３０ＭＰａを下回る場
合は、ドアの取り付け位置からのズレや、ドア部とフラ
ンジ部の隙間が発生し、筐体が変形していることが判っ
た。[Table 1] On the other hand, when the bending elastic modulus of the vacuum heat insulating material was less than 30 MPa, it was found that the housing was deformed due to a deviation from the door mounting position and a gap between the door portion and the flange portion.
【００４４】更に、硬質ウレタンフォームの密度が６０
ｋｇ／ｍ3を越えると、熱伝導率が０．０２７Ｗ／ｍＫ
と極端に悪化した。Further, the density of the rigid urethane foam is 60.
If it exceeds kg / m 3 , the thermal conductivity will be 0.027 W / mK.
And became extremely worse.
【００４５】よって、断熱箱体の剛性強度と断熱性能の
両方を確保するには、真空断熱材の曲げ弾性率が３０Ｍ
Ｐａ以上、かつ硬質ウレタンフォームの密度が６０ｋｇ
／ｍ 3以下であることが必要と判った。更には、真空断
熱材の密度は１５０ｋｇ／ｍ3以上であることがより望
ましい。Therefore, the rigidity strength and heat insulation performance of the heat insulation box are
To secure both, the flexural modulus of vacuum insulation is 30M
Pa or more and the density of rigid urethane foam is 60 kg
/ M 3It turned out that the following was necessary. Furthermore, the vacuum break
The density of the heat material is 150 kg / m3More than desired
Good
【００４６】（実施の形態２）本発明の実施の形態２に
おける一実施例の断熱箱体およびこの断熱箱体を備えた
冷蔵庫を図２から図３に示す。(Embodiment 2) FIGS. 2 to 3 show a heat-insulating box body and a refrigerator provided with this heat-insulating box body according to an example of the second embodiment of the present invention.
【００４７】図２、図３において、７は冷蔵庫本体であ
り、７はドア９を含めた断熱箱体８で、合成樹脂からな
る内箱１０と金属からなる外箱１１とから形成される空
間１２に硬質ウレタンフォーム１３と真空断熱材１４が
複層構造で配設されている。断熱箱体８の製造にあたっ
ては、真空断熱材１４をあらかじめ外箱１１に接着固定
し、内箱１０と外箱１１とから形成される空間１２に空
間硬質ウレタンフォーム１３の原料を注入して一体発泡
を行う。In FIGS. 2 and 3, 7 is a refrigerator main body, 7 is a heat insulating box 8 including a door 9 and is a space formed by an inner box 10 made of synthetic resin and an outer box 11 made of metal. In 12, a hard urethane foam 13 and a vacuum heat insulating material 14 are arranged in a multilayer structure. In manufacturing the heat insulating box body 8, the vacuum heat insulating material 14 is bonded and fixed to the outer box 11 in advance, and the raw material of the space rigid urethane foam 13 is injected into the space 12 formed by the inner box 10 and the outer box 11 to be integrated. Foaming.
【００４８】真空断熱材１４は、断熱箱体８の両側面、
天面、背面、底面およびドア面の各面に配置され、外箱
１１の表面積の７０％を占めて配設されている。The vacuum heat insulating material 14 is provided on both side surfaces of the heat insulating box 8,
It is arranged on each of the top surface, the back surface, the bottom surface, and the door surface, and occupies 70% of the surface area of the outer box 11.
【００４９】１５は冷凍室、１６は冷蔵室、１７は野菜
室であり、これら３室で冷却室を構成している。冷凍室
１５は概ね−１５℃〜−２５℃の冷凍領域に、冷蔵室１
６、野菜室１７は概ね０℃〜１０℃の冷蔵領域に温度設
定されている。１８は圧縮機、１９は凝縮器、２０は冷
却器であり、これらにより冷却装置を構成している。Reference numeral 15 is a freezing compartment, 16 is a refrigerating compartment, and 17 is a vegetable compartment. These three compartments constitute a cooling compartment. The freezer compartment 15 is generally in the freezing area of -15 ° C to -25 ° C, and the refrigerator compartment 1
6. The temperature of the vegetable compartment 17 is generally set in the refrigerating region of 0 ° C to 10 ° C. Reference numeral 18 is a compressor, 19 is a condenser, and 20 is a cooler, and these constitute a cooling device.
【００５０】冷蔵庫本体７は、断熱箱体８と、冷凍室１
５、冷蔵室１６、野菜室１７と、これら冷却室を冷却す
る圧縮機１８、凝縮器１９、冷却器２０を備えた冷却装
置により構成されている。The refrigerator main body 7 includes a heat insulating box 8 and a freezer compartment 1.
5, a refrigerating compartment 16, a vegetable compartment 17, and a cooling device including a compressor 18, a condenser 19 and a cooler 20 for cooling these cooling compartments.
【００５１】このようにして製造した冷蔵庫は、断熱箱
体の断熱性能に起因する熱負荷が効率的に低減し、省エ
ネルギーとコストパフォーマンスに優れた高品質で高耐
久性を有する冷蔵庫となる。The refrigerator manufactured as described above is a refrigerator having a high quality and a high durability which is excellent in energy saving and cost performance because the heat load due to the heat insulating performance of the heat insulating box is efficiently reduced.
【００５２】また、本発明の真空断熱材は優れた断熱性
能を有するため、省エネルギーを追求しない場合には、
断熱壁の薄壁化が可能となるため、冷蔵庫の省スペース
化、或いは冷蔵庫の庫内容積向上が達成できる。Further, since the vacuum heat insulating material of the present invention has excellent heat insulating performance, if energy saving is not pursued,
Since it is possible to make the heat insulating wall thinner, it is possible to save space in the refrigerator or increase the internal volume of the refrigerator.
【００５３】一方、このとき使用した一実施例の真空断
熱材１４を図４に示す。真空断熱材１４は、芯材２１
と、ガスバリヤ性のラミネートフィルムからなる外被材
２２とから構成されている。前記真空断熱材の製造は、
無機繊維集合体からなる芯材２１を１３０℃で１時間乾
燥後、袋体の外被材２２中に挿入、内部を１０Ｐａまで
減圧し、袋体の外被材開口部を熱融着により封止するこ
とにより行う。On the other hand, FIG. 4 shows the vacuum heat insulating material 14 of one embodiment used at this time. The vacuum heat insulating material 14 is the core material 21.
And an outer covering material 22 made of a gas barrier laminate film. The manufacture of the vacuum insulation material,
After the core material 21 made of the inorganic fiber aggregate is dried at 130 ° C. for 1 hour, it is inserted into the outer covering material 22 of the bag body, the inside pressure is reduced to 10 Pa, and the opening of the outer covering material of the bag body is sealed by heat fusion. Do by stopping.
【００５４】以下、真空断熱材１４の構成材料の一例に
ついて説明する。An example of the constituent material of the vacuum heat insulating material 14 will be described below.
【００５５】芯材２１は、非晶質構造の珪酸ガラスを主
成分とする平均繊維径０．１μｍ〜１０μｍのシート状
のグラスウールを厚み１５ｍｍのボード状に圧縮成型し
たものである。また、このとき、必用に応じてバインダ
ーや酸を使用してもよい。更には、グラスウールは抄造
法によりシート状に成型してもよい。こうして作製した
芯材の嵩密度は、０．１ｇ／ｃｍ3〜０．３ｇ／ｃｍ3で
あった。なお、前記繊維径はＳＥＭ像をもとに算出し
た。The core material 21 is a sheet-shaped glass wool having an average fiber diameter of 0.1 μm to 10 μm, which is mainly composed of silicate glass having an amorphous structure, and is compression molded into a board shape having a thickness of 15 mm. At this time, a binder or an acid may be used if necessary. Further, glass wool may be formed into a sheet by a papermaking method. Thus the bulk density of the core material produced was 0.1g / cm 3 ~0.3g / cm 3 . The fiber diameter was calculated based on the SEM image.
【００５６】また、芯材の構成材料は特に限定するもの
ではなく、無機繊維としてはグラスウール、セラミック
ファイバー、ロックウール等、無機粉末としては、非晶
質シリカ粉末、乾式シリカ粉末、パーライト、前記粉体
の混合物等、有機発泡体としては、ウレタン連通フォー
ム、ポリスチレン連通フォーム等、真空断熱材の使用用
途に応じて任意に選択して使用することができるが、高
い曲げ弾性率と低い熱伝導率の両方を兼ね備えた真空断
熱材を製造できる無機繊維系の芯材が特に良好である。The constituent material of the core material is not particularly limited, and the inorganic fibers are glass wool, ceramic fibers, rock wool, etc., and the inorganic powders are amorphous silica powder, dry silica powder, pearlite, and the above-mentioned powders. As an organic foam such as a mixture of bodies, it can be arbitrarily selected and used according to the intended use of the vacuum heat insulating material such as urethane continuous foam, polystyrene continuous foam, etc., but it has a high bending elastic modulus and a low thermal conductivity. An inorganic fiber-based core material capable of producing a vacuum heat insulating material having both of the above is particularly preferable.
【００５７】外被材２２は、片面が表面保護層としてポ
リエチレンテレフタレート（１５μｍ）と、中間層に金
属箔であるアルミ箔（６μｍ）と、熱融着層に高密度ポ
リエチレン（５０μｍ）から形成したラミネートフィル
ムであり、もう一方の面には、表面保護層にポリエチレ
ンテレフタレート（１５μｍ）と、中間層に６００Åの
アルミ蒸着を施したエチレン・ビニルアルコール共重合
体樹脂組成物（１５μｍ）と、熱融着層に高密度ポリエ
チレン（５０μｍ）とから形成したラミネートフィルム
である。更に、外被材の対突き刺し性を向上させるた
め、ポリエチレンテレフタレートの外側にナイロン層を
付与してもよい。The outer cover material 22 was formed of polyethylene terephthalate (15 μm) on one surface as a surface protective layer, aluminum foil (6 μm) as a metal foil as an intermediate layer, and high density polyethylene (50 μm) as a heat-sealing layer. It is a laminated film, and on the other side, polyethylene terephthalate (15 μm) is used as the surface protection layer, and 600 Å aluminum vapor-deposited ethylene / vinyl alcohol copolymer resin composition (15 μm) is used as the intermediate layer, and heat-melted. It is a laminated film formed from high-density polyethylene (50 μm) for the coating layer. Further, in order to improve the puncture resistance of the outer covering material, a nylon layer may be provided on the outside of the polyethylene terephthalate.
【００５８】一般に、真空断熱材用の外被材の材料構成
は、最外層は衝撃からの保護や剛性を付与させるもので
あり、中間層はガスバリヤ性を確保するものであり、最
内層は熱融着層としてフィルムの熱融着によって密封
（ヒートシール）する機能を有するものである。ここ
で、熱融着層として使用できるプラスチックフィルム
は、高密度ポリエチレン、低密度ポリエチレン、直鎖状
低密度ポリエチレンおよびポリプロピレン等があるが、
ヒートシール性、ガスバリヤ性、耐ケミカルアタック性
およびコストなどの観点からトータル的には高密度ポリ
エチレンが好ましい。また、真空断熱材の使用環境温度
が６０℃〜１００℃前後の場合には、ポリプロピレンを
用いるのがより望ましい。また、減圧封止工程における
封止品質の安定性やシール強度を重視する場合には、直
鎖状低密度ポリエチレンを用いるのがより望ましい。ま
た、減圧封止工程における封止品質の安定性や熱融着部
側面からのガス侵入の抑制を考慮した場合、熱融着層の
厚さは２５μｍ〜６０μｍが適している。Generally, in the material constitution of the covering material for the vacuum heat insulating material, the outermost layer is for providing protection from impact and rigidity, the intermediate layer is for ensuring gas barrier property, and the innermost layer is for heat. The fusion layer has a function of sealing (heat sealing) by heat fusion of the film. Here, the plastic film that can be used as the heat-sealing layer includes high-density polyethylene, low-density polyethylene, linear low-density polyethylene and polypropylene,
From the viewpoints of heat sealing property, gas barrier property, chemical attack resistance, cost, etc., high density polyethylene is preferable in total. Further, when the environment temperature of the vacuum heat insulating material is around 60 ° C to 100 ° C, it is more preferable to use polypropylene. Further, when importance is attached to the stability of the sealing quality and the sealing strength in the reduced pressure sealing step, it is more preferable to use linear low density polyethylene. Further, in consideration of the stability of the sealing quality in the vacuum sealing step and the suppression of gas intrusion from the side surface of the heat-sealing portion, the thickness of the heat-sealing layer is preferably 25 μm to 60 μm.
【００５９】また、図４には示していないが、必要に応
じて活性炭、ゼオライト、ドーソナイト、ハイドロタル
サイト、塩化カルシウム、塩化リチウム、酸化マグネシ
ウムや酸化カルシウム等の金属酸化物および水酸化マグ
ネシウムや水酸化カルシウム等の金属水酸化物等の化合
物を芯材と共に密封し、ガス吸着剤として使用すること
もできる。より望ましくは、バリウム・リチウム合金を
有するサエスゲッター社製のＣＯＭＢＯ ＧＥＴＴＥＲ
を適用することにより、より長期に亘って優れた断熱性
能が維持できる。Although not shown in FIG. 4, activated carbon, zeolite, dawsonite, hydrotalcite, calcium chloride, lithium chloride, metal oxides such as magnesium oxide and calcium oxide, magnesium hydroxide and water, if necessary. A compound such as a metal hydroxide such as calcium oxide may be sealed with the core material and used as a gas adsorbent. More preferably, COMBO GETTER manufactured by SAES Getter having a barium-lithium alloy is used.
By applying, it is possible to maintain excellent heat insulation performance for a longer period of time.
【００６０】[0060]
【発明の効果】以上のように本発明により、硬質ウレタ
ンフォームと真空断熱材からなる断熱箱体において、真
空断熱材の被覆率を大幅に高めた場合にも、真空断熱材
の曲げ弾性率が、硬質ウレタンフォームの曲げ弾性率を
大幅に上回る３０ＭＰａ以上を有しているため、真空断
熱材を複層することによって生じる箱体強度の低下はな
く、収納物の重量に耐えきれず箱体が変形するなどの問
題はない。As described above, according to the present invention, in the heat insulating box body made of the rigid urethane foam and the vacuum heat insulating material, even when the coverage of the vacuum heat insulating material is significantly increased, the bending elastic modulus of the vacuum heat insulating material is increased. Since it has a bending elastic modulus of 30 MPa or more, which is significantly higher than the bending elastic modulus of rigid urethane foam, there is no decrease in the strength of the box that occurs due to multiple layers of vacuum insulation materials, and the box cannot bear the weight of the stored items and There is no problem such as deformation.
【００６１】よって、箱体強度として問題なく、かつ初
期および経時的にも断熱性能に優れた断熱箱体が提供で
きると共に、消費電力量の少ない高品質な冷蔵庫を提供
できる。Therefore, it is possible to provide a heat-insulating box which has no problem in box strength and is excellent in heat-insulating performance even in the initial stage and over time, and it is possible to provide a high-quality refrigerator with low power consumption.
【図１】本発明の一実施の形態における断熱箱体の側面
断面図FIG. 1 is a side sectional view of a heat insulating box in an embodiment of the present invention.
【図２】本発明の一実施の形態における冷蔵庫の正面断
面図FIG. 2 is a front sectional view of the refrigerator according to the embodiment of the present invention.
【図３】本発明の一実施の形態における冷蔵庫の側面断
面図FIG. 3 is a side sectional view of the refrigerator according to the embodiment of the present invention.
【図４】本発明の一実施の形態における真空断熱材の断
面図FIG. 4 is a sectional view of the vacuum heat insulating material according to the embodiment of the present invention.
１ 断熱箱体 ５，１３ 硬質ウレタンフォーム ６，１４ 真空断熱材 ７ 冷蔵庫本体 ８ 断熱箱体 １５ 冷凍室 １６ 冷蔵室 １７ 野菜室 ２０ 冷却器 ２１ 芯材 ２２ 外被材 1 Insulation box 5,13 rigid urethane foam 6,14 Vacuum insulation 7 Refrigerator body 8 Insulation box 15 Freezer 16 Refrigerator 17 vegetable room 20 cooler 21 core material 22 Outer material
Claims (4)
断熱材を配設し硬質ウレタンフォームを一体発泡した複
層構造の断熱箱体において、前記真空断熱材は、断熱箱
体の両側面，天面，背面，底面およびドア面の各面に配
設され、芯材が無機繊維集合体よりなり、前記無機繊維
集合体をバインダーで結着し、かつ密度を１５０ｋｇ／
ｍ 3 以上とすることにより曲げ弾性率を３０ＭＰａ以上
とした真空断熱材であり、前記硬質ウレタンフォーム
は、密度を６０ｋｇ／ｍ3以下とした硬質ウレタンフォ
ームであって、前記硬質ウレタンフォームによる剛性強
化を断熱性低下のない密度範囲に抑えながら、前記真空
断熱材の曲げ弾性率を強化することによって複層構造の
箱体強度を高めた断熱箱体。1. A vacuum is provided in a space formed by an inner box and an outer box.
Insulation material is arranged and rigid urethane foam is integrally foamed.
In a heat insulating box having a layered structure, the vacuum heat insulating material is a heat insulating box.
Located on each side of the body, top, back, bottom and door
The core material is made of an inorganic fiber aggregate,
The aggregate is bound with a binder, and the density is 150 kg /
The rigid urethane foam is a vacuum heat insulating material having a bending elastic modulus of 30 MPa or more by setting the m 3 or more.
Is a rigid urethane foam having a density of 60 kg / m 3 or less.
The above-mentioned vacuum
By increasing the flexural modulus of the insulation,
Insulated box with enhanced box strength .
％を越えてなる請求項１記載の断熱箱体。2. The coverage of the vacuum heat insulating material is 40% of the outer box surface area.
The heat-insulating box body according to claim 1, wherein the heat-insulating box body is more than%.
％を越え、かつドアを３つ以上有する請求項１記載の断
熱箱体。3. The coverage of the vacuum heat insulating material is 30 of the outer box surface area.
%, And has three or more doors.
項記載の断熱箱体と、前記断熱箱体内に形成される冷却
室と、前記冷却室を冷却する冷却装置よりなる冷蔵庫。4. A refrigerator comprising the heat insulating box according to any one of claims 1 to 3 , a cooling chamber formed in the heat insulating box, and a cooling device for cooling the cooling chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002159106A JP3488229B2 (en) | 2001-09-05 | 2002-05-31 | Insulated box and refrigerator |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-268482 | 2001-09-05 | ||
| JP2001268482 | 2001-09-05 | ||
| JP2002159106A JP3488229B2 (en) | 2001-09-05 | 2002-05-31 | Insulated box and refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003156192A JP2003156192A (en) | 2003-05-30 |
| JP3488229B2 true JP3488229B2 (en) | 2004-01-19 |
Family
ID=26621685
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002159106A Expired - Fee Related JP3488229B2 (en) | 2001-09-05 | 2002-05-31 | Insulated box and refrigerator |
Country Status (1)
| Country | Link |
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| JP (1) | JP3488229B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200641315A (en) * | 2005-04-01 | 2006-12-01 | Matsushita Electric Ind Co Ltd | Refrigerator |
| JP4814684B2 (en) * | 2006-04-20 | 2011-11-16 | 日立アプライアンス株式会社 | Vacuum heat insulating material, refrigerator and vehicle using the same |
| JP2011153719A (en) * | 2010-01-26 | 2011-08-11 | Hitachi Appliances Inc | Refrigerator-freezer |
| DE102010029513A1 (en) * | 2010-05-31 | 2011-02-24 | Wacker Chemie Ag | Insulation with layer structure |
| CN109855371B (en) * | 2013-06-07 | 2021-01-29 | 三菱电机株式会社 | Refrigerator with a door |
| WO2014196220A1 (en) * | 2013-06-07 | 2014-12-11 | 三菱電機株式会社 | Refrigerator |
| SG10201801047VA (en) * | 2013-06-07 | 2018-03-28 | Mitsubishi Electric Corp | Heat insulating box body, refrigerator, and device including heat insulating box body |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07110097A (en) * | 1993-07-19 | 1995-04-25 | Takeda Chem Ind Ltd | Heat insulation material |
| JPH07139691A (en) * | 1993-11-19 | 1995-05-30 | Nippon Muki Co Ltd | Vacuum heat insulation material and manufacture thereof |
| JPH0868591A (en) * | 1994-08-29 | 1996-03-12 | Toshiba Corp | Heat-insulating box |
| JP3822301B2 (en) * | 1997-01-31 | 2006-09-20 | サンスター技研株式会社 | Two-component urethane composition for urethane foam |
-
2002
- 2002-05-31 JP JP2002159106A patent/JP3488229B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2003156192A (en) | 2003-05-30 |
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