KR100690895B1 - Vacuum isolation panel and isolation structure applying same - Google Patents

Vacuum isolation panel and isolation structure applying same Download PDF

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Publication number
KR100690895B1
KR100690895B1 KR1020050098296A KR20050098296A KR100690895B1 KR 100690895 B1 KR100690895 B1 KR 100690895B1 KR 1020050098296 A KR1020050098296 A KR 1020050098296A KR 20050098296 A KR20050098296 A KR 20050098296A KR 100690895 B1 KR100690895 B1 KR 100690895B1
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KR
South Korea
Prior art keywords
layer
vacuum
outermost layer
heat
aluminum layer
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KR1020050098296A
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Korean (ko)
Inventor
정동주
김영배
김경도
홍상의
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엘지전자 주식회사
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Priority to KR1020050098296A priority Critical patent/KR100690895B1/en
Priority to AU2006305083A priority patent/AU2006305083B2/en
Priority to CN201110184836.8A priority patent/CN102401215B/en
Priority to EP12165509.6A priority patent/EP2484951B1/en
Priority to CN2006800389973A priority patent/CN101292111B/en
Priority to EP06799280.0A priority patent/EP1945993B1/en
Priority to US12/090,473 priority patent/US7993723B2/en
Priority to PCT/KR2006/004203 priority patent/WO2007046614A2/en
Application granted granted Critical
Publication of KR100690895B1 publication Critical patent/KR100690895B1/en

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    • 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
    • F25D23/06—Walls
    • F25D23/065—Details
    • 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
    • F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
    • 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
    • F25D2201/00—Insulation
    • F25D2201/10—Insulation with respect to heat
    • F25D2201/14—Insulation with respect to heat using subatmospheric pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/24—Structural elements or technologies for improving thermal insulation
    • Y02A30/242—Slab shaped vacuum insulation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B80/00—Architectural or constructional elements improving the thermal performance of buildings
    • Y02B80/10—Insulation, e.g. vacuum or aerogel insulation

Abstract

A vacuum insulation panel and an insulation structure applying the same are provided to improve strength of a film forming a sealing cover to prevent damage of the film, and restrain generation of pin holes in spite of folding of a heat sealing part to prevent permeation of external air and moisture. A vacuum insulation panel includes a core element, and a sealing cover(120) surrounding the core element. The sealing cover is formed of an outermost layer(121) exposed to the outside, a thermal binding layer(124) contacting the core element, and an aluminum layer(123) formed between the outermost layer and the thermal binding layer. The aluminum layer is formed of materials of which Fe content is increased up to a range of 0.7wt%-1.3wt% for preventing generation of pin holes in the aluminum layer even when the aluminum layer is folded. A protecting layer(122) is stacked on a bottom surface of the outermost layer for preventing damage of the outermost layer during assembling or installation of the vacuum isolation panel, wherein both of the outermost layer and the protecting layer are formed of nylon having high elasticity.

Description

진공 단열재 및 이를 적용한 냉장고의 단열 구조{VACUUM ISOLATION PANEL AND ISOLATION STRUCTURE APPLYING SAME} VACUUM ISOLATION PANEL AND ISOLATION STRUCTURE APPLYING SAME}

도1은 냉장고 캐비넷의 사시도1 is a perspective view of a refrigerator cabinet

도2는 도1의 절단선 X-X에 따른 종래의 단열 구조의 단면도2 is a cross-sectional view of a conventional heat insulation structure according to the cutting line X-X of FIG.

도3은 도1의 절단선 X-X에 따른 또 다른 형태의 종래의 단열 구조의 단면도3 is a cross-sectional view of another conventional heat insulating structure according to the cutting line X-X of FIG.

도4는 도1의 진공 단열재의 구성을 도시한 단면도4 is a cross-sectional view showing the configuration of the vacuum insulator of FIG.

도5는 도4의 덮개 필름의 적층 구성을 도시한 도면FIG. 5 is a diagram illustrating a laminated configuration of the cover film of FIG. 4. FIG.

도6는 본 발명의 일 실시예에 따른 진공 단열재의 구성을 도시한 단면도Figure 6 is a cross-sectional view showing the configuration of a vacuum insulator according to an embodiment of the present invention

도7는 도6의 외부 형상을 도시한 사시도FIG. 7 is a perspective view showing the outer shape of FIG.

도8은 도6의 덮개 필름의 구성을 도시한 도면FIG. 8 is a diagram showing the configuration of a lid film of FIG.

도9은 도8의 알루미늄층의 조직을 도시한 조직도9 is a structure diagram showing the structure of the aluminum layer of FIG.

도10은 도8의 알루미늄층의 두께에 따른 핀홀수 분포도FIG. 10 is a pinhole distribution diagram according to the thickness of the aluminum layer of FIG.

도11은 도8의 알루미늄층의 두께에 따른 강도 분포도FIG. 11 is a strength distribution diagram according to the thickness of the aluminum layer of FIG.

도12는 도8의 알루미늄층의 두께에 따른 신율 분포도12 is an elongation distribution diagram according to the thickness of the aluminum layer of FIG.

** 도면의 주요 부분에 대한 부호의 설명 ** ** Description of symbols for the main parts of the drawing **

1: 냉장고 캐비넷 40: 진공 단열재1: refrigerator cabinet 40: vacuum insulation

100: 필름 110: 최외곽층100: film 110: outermost layer

120: 보호층 130: 알루미늄층120: protective layer 130: aluminum layer

140: 열융착층140: heat seal layer

본 발명은 진공 단열재에 관한 것으로, 보다 상세하게는 강도를 향상시켜 필름이 손상되는 것을 방지하고, 접히는 부분에서 핀홀(pin hole)이 발생되지 않도록 함으로써 진공 단열의 성능을 향상시키며, 적절한 알루미늄층의 두께와 재질을 선정함으로써 열손실을 줄일 수 있는 진공 단열재에 관한 것이다.The present invention relates to a vacuum insulator, and more particularly, to improve the strength of the vacuum insulation by improving the strength to prevent the film from being damaged, and to prevent pin holes from being generated in the folded portion, It relates to a vacuum insulator which can reduce heat loss by selecting thickness and material.

도1에 도시된 바와 같이, 일반적으로 냉장고(1)는 식품을 저온 저장하기 위한 장치로서, 식품을 수납하도록 냉장실이나 냉동실 등과 같은 수납 공간(20)을 형성하는 캐비넷(10)과, 냉장실과 냉동실을 개폐하는 도어(미도시)와, 냉매 사이클로 구성되어 수납된 식품을 저온 상태로 유지하는 기계부(미도시)로 구성된다. As shown in FIG. 1, a refrigerator 1 is generally a device for storing food at low temperature, and includes a cabinet 10 that forms a storage space 20 such as a refrigerator compartment or a freezer compartment for storing food, and a refrigerator compartment and a freezer compartment. It comprises a door (not shown) for opening and closing the, and a mechanical part (not shown) configured to keep the food stored in the low temperature state composed of a refrigerant cycle.

여기서, 캐비넷(10)은 외형을 형성하는 외면과 수납 공간을 형성하는 내면 사이에 단열재가 충전되어 보냉 효과를 증대시킨다. 이를 위하여, 도2에 도시된 바와 같이, 조립된 상태의 캐비넷의 내면(20)과 외면(10)의 사이에 폴리우레탄 발포액을 주입한 후 가열하여 발포시켜 형성된 폴리우레탄 발포폼(30)이 충전된다. 그러나, 폴리우레탄 발포폼(30)에는 열을 전달하는 공기가 함입되고 폴리우레탄 자체의 열전도 특성으로 인하여 단열 성능을 향상시키는 데 제약이 있었다. Here, the cabinet 10 is filled with a heat insulating material between the outer surface to form the outer shape and the inner surface to form the storage space to increase the cold effect. To this end, as shown in Figure 2, the polyurethane foam foam 30 is formed by injecting a polyurethane foam liquid between the inner surface 20 and the outer surface 10 of the cabinet in the assembled state and then heated and foamed Is charged. However, the polyurethane foam 30 has a limitation in improving the thermal insulation performance due to the incorporation of air to transfer heat and the thermal conductivity of the polyurethane itself.

따라서, 냉장고 내부의 수납 공간과 냉장고의 외기 사이에 열교환을 보다 차 단하여 냉장 효율과 에너지 효율을 향상시키기 위하여, 최근에는 캐비넷 외면(10)과 캐비넷 내면(20) 사이에 폴리우레탄 발포폼으로 형성된 단열부(30) 이외에 진공 단열재(40)를 더 포함하여 구성된 개선된 형태의 단열 구조가 사용되기 시작되었다. Therefore, in order to further block heat exchange between the storage space inside the refrigerator and the outside air of the refrigerator to improve the refrigerating efficiency and energy efficiency, recently, a polyurethane foam is formed between the cabinet outer surface 10 and the cabinet inner surface 20. In addition to the thermal insulation 30, an improved form of thermal insulation structure, which further comprises a vacuum insulation 40, has begun to be used.

구체적으로는, 상기 진공 단열재(40)는, 도4에 도시된 바와 같이, 유리 섬유로 직조된 패널이 적층되고 상기 패널의 사이가 진공으로 형성된 코어재(41)와, 코어재(41)의 진공을 유지하기 위하여 코어재(41)를 밀봉 감싸도록 알루미늄 라미네이트 필름으로 형성된 밀봉 덮개(42)와, 단열 밀봉 덮개(42)를 투과하여 유입되는 가스 성분을 제거하여 충분한 기간 동안 진공 단열재로서의 단열 성능을 유지하도록 형성된 게터(getter, 43)를 포함하여 구성된다. Specifically, as shown in FIG. 4, the vacuum insulator 40 includes a core material 41 and a core material 41 in which a panel woven from glass fibers is stacked and a vacuum is formed between the panels. Insulation performance 42 as a vacuum insulation material for a sufficient period of time by removing the sealing cover 42 formed of an aluminum laminate film to seal and wrap the core material 41 and the gas component flowing through the insulation sealing cover 42 to maintain a vacuum It is configured to include a getter (43) formed to hold.

여기서, 도5에 도시된 바와 같이, 밀봉 덮개(42)는 최외곽층(42a)과, A1235 재질(일본에서는 동일한 재질이 "1N30"이라고 함)의 알루미늄층(42b)과, 탄소(C)수가 4개인 부틴(Butene) 베이스 재질의 LLDPE 재질로 형성된다. Here, as shown in FIG. 5, the sealing cover 42 is the outermost layer 42a, the aluminum layer 42b of A1235 material (the same material is called "1N30" in Japan), and carbon (C). It is made of LLDPE material of 4 butene base material.

그러나, 상기와 같이 구성된 밀봉 덮개(42)는 냉장고 캐비넷(10) 내에 삽입되어 설치되는 중에, 코어재(41)로부터 돌출되어 열융착된 덮개부(42')를 접어야 하는데, 접는 과정에서 알루미늄층(42b)에 핀홀(pin hole)이 발생됨에 따라, 외부의 공기가 핀홀을 통하여 유입되어 코어재(41)의 진공도가 해제되어 진공 단열재(40)의 단열 성능이 시간이 지남에 따라 급격히 악화되는 현상이 발생되는 문제점을 가지고 있었다. However, the sealing cover 42 configured as described above should fold the cover portion 42 'protruded from the core material 41 and thermally fused while being inserted into the refrigerator cabinet 10 and installed. As a pin hole is generated in the 42b, external air flows in through the pinhole, and the degree of vacuum of the core material 41 is released, so that the thermal insulation performance of the vacuum insulator 40 rapidly deteriorates with time. There was a problem that the phenomenon occurs.

따라서, 유가의 급격한 상승과 에너지 절약의 필요성에 따라 냉동기 및 냉장 고 등에 여러 제품에 적용 가능하고 보다 우수한 단열 성능을 갖는 진공 단열재(40)의 필요성이 점점 증대되고 있다.Accordingly, the necessity of the vacuum insulator 40 which can be applied to various products such as a refrigerator and a refrigerator, and has better heat insulating performance according to the sharp rise in oil prices and the necessity of energy saving is increasing.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하고자 안출된 것으로서, 밀봉 덮개를 형성하는 필름의 강도를 향상시켜, 필름의 파손에 따라 진공 단열재의 단열 성능이 저하되는 것을 방지하는 것을 그 목적으로 한다. The present invention has been made to solve the problems of the prior art as described above, it is intended to improve the strength of the film forming the sealing cover, to prevent the thermal insulation performance of the vacuum insulator deteriorated due to breakage of the film. .

그리고, 본 발명은, 진공 단열재를 냉장고의 캐비넷 내부에 설치하는 과정에서, 진공 단열재의 열봉합부가 접히더라도 핀홀의 발생을 최대한으로 억제하여, 외부의 공기나 습기가 진공 단열재의 내부로 침투하는 것을 방지함으로써, 장기간동안 우수한 단열 성능을 유지하도록 하는 것을 또 다른 목적으로 한다. In addition, the present invention, in the process of installing the vacuum insulator inside the cabinet of the refrigerator, even if the heat sealing portion of the vacuum insulator is folded to suppress the generation of pinhole to the maximum, so that the outside air or moisture penetrates into the interior of the vacuum insulator It is yet another object to maintain good thermal insulation performance for long periods of time.

본 발명은 상술한 바와 같은 목적을 달성하기 위하여, 코어재와; 외부로 드러나는 최외곽층과, 상기 코어재와 접하는 열융착층과, 철(Fe)의 함유량이 0.7wt% 내지 1.3 wt%인 소재로 상기 최외곽층과 상기 열융착층 사이에 형성된 알루미늄층을 포함하고, 상기 코어재를 감싸도록 형성된 밀봉 덮개를 포함하여 구성된 것을 특징으로 하는 진공 단열재를 제공한다.The present invention, in order to achieve the object as described above, the core material; The outermost layer that is exposed to the outside, the heat-sealing layer in contact with the core material, and the aluminum layer formed between the outermost layer and the heat-sealing layer of a material having a content of iron (Fe) of 0.7wt% to 1.3wt% It includes, and provides a vacuum insulating material comprising a sealing cover formed to surround the core material.

이는, 철(Fe)의 함량이 0.65wt%를 함유한 A1235소재로 형성된 종래의 알루미늄층에 비하여, 철(Fe)의 함량을 높임으로써 결정립을 미세화하여 압연과 같은 제품 가공시 결정립간 슬립이 적어지게 되어, 접히더라도 알루미늄층에 핀홀이 발생되는 것이 억제되도록 하기 위함이다. 여기서, 철(Fe)의 함량이 0.7wt%보다 작으 면, 접힌 경우에 핀홀의 발생 빈도가 급격히 늘어나며, 철(Fe)의 함량이 1.3wt%보다 커지면, 신율을 높이는 데 제한적이므로, 철(Fe)의 함량이 0.7wt% 내지 1.3 wt%로 유지된 상태에서 최적의 상태를 유지할 수 있게 된다.Compared with the conventional aluminum layer formed of A1235 material containing 0.65 wt% of iron (Fe), this increases the iron (Fe) content to make grains finer, resulting in less slip between grains during processing such as rolling. This is to prevent pinholes from being generated in the aluminum layer even when folded. Here, if the content of iron (Fe) is less than 0.7wt%, the frequency of occurrence of pinholes rapidly increases when folded, and if the content of iron (Fe) is greater than 1.3wt%, it is limited to increase the elongation. ) Can be maintained in an optimal state while the content of) is maintained at 0.7wt% to 1.3wt%.

그리고, 상기 열융착층은 탄소(C)수가 8개의 옥탄 베이스의 LLDPE(Linear Low Density Polyethylene)으로 형성된다. 종래의 열융착층은 탄소(C)수가 4개의 부틴(Butene) 베이스의 LLDPE로 형성되었으나, 본 발명에 따른 진공 단열재의 열융착층은 탄소(C)수가 8개의 옥탄 베이스의 LLDPE로 형성됨에 따라, 종래에 비하여 내열성과 씰링(sealing) 강도가 향상된다. The heat-sealing layer is formed of linear low density polyethylene (LLDPE) having 8 octane carbons (C). Conventional heat-sealing layer is formed of a C-Butne-based LLDPE, but the heat-sealing layer of the vacuum insulator according to the present invention is formed of an 8-octane-based LLDPE (C) As compared with the related art, heat resistance and sealing strength are improved.

다시 말하면, 진공 단열재의 코어부의 진공도를 유지하기 위하여 상하측의 밀봉 덮개를 서로 접착시키는 과정에서, 열융착층의 내열 강도(heat sealing strength)에 따라 진공 단열재의 진공도가 정해진다. 실험 결과에 따르면, 160℃에서 UTM으로 10mm를 인장시켜 3kgf/cm2에 해당하는 인장 응력을 1초간 가한 경우에, 탄소(C)수가 4개의 부틴(Butene) 베이스의 종래 LLDPE는 4.29kgf/10mm 의 내열 강도를 가진 데 반하여, 탄소(C)수가 8개의 옥탄 베이스의 본 발명에 따른 LLDPE는 4.99kgf/10mm 의 내열 강도를 가지고 있음을 보였다. 즉, 종래의 LLDPE에 비하여 본 발명의 LLDPE는 16.3%의 향상된 내열 강도를 가지고 있음이 확인되었다.In other words, in the process of adhering the upper and lower sealing covers to each other in order to maintain the vacuum degree of the core portion of the vacuum insulator, the vacuum degree of the vacuum insulator is determined according to the heat sealing strength of the heat seal layer. According to the experimental results, when a tensile stress corresponding to 3 kgf / cm2 was applied for 1 second by pulling 10 mm with UTM at 160 ° C, the conventional LLDPE having four butene bases of 4.29 kgf / 10 mm was used. In contrast to the heat-resistant strength, the LLDPE according to the invention with 8 octane base carbon (C) number was shown to have a heat resistance of 4.99kgf / 10mm. That is, it was confirmed that the LLDPE of the present invention has an improved heat resistance of 16.3% compared to the conventional LLDPE.

또한, 본 발명에 따른 진공 단열재의 상기 최외곽층은 신축성이 뛰어나 나일론 소재로 2겹으로 형성된다. 즉, 최외곽층은 또 다른 하나의 보호층이 형성된다. 이 때, 두께는 각각 15㎛, 25㎛ 로 형성된다. 이를 통하여, 취급이나 설치 중의 외부의 충격에 의하여 밀봉 덮개가 파손되는 것이 방지된다. In addition, the outermost layer of the vacuum insulator according to the present invention is excellent in elasticity is formed of two layers of nylon material. That is, the outermost layer is another protective layer is formed. At this time, the thickness is formed to be 15 µm and 25 µm, respectively. This prevents the sealing cover from being damaged by an external impact during handling or installation.

한편, 상기 최외곽층은 상기 최외곽층은 12㎛ 내지 13㎛ 두께의 PET 기재상에 인라인 코팅법에 의하여 PVDC(Polyvinylidene Chloride)로 코팅된 K-PET으로 형성될 수도 있다. 이는, K-PET가 종래의 PET에 비하여 가스 차단 특성이 10배 이상 우수하기 때문이다. 이때, PVDC층은 비용이 많이 소요되며, 최외곽층으로 사용하기에는 유연한 정도가 떨어지므로, 코팅하여 사용하는 것이 최적의 가스 차단 특성과 내구성을 가질 수 있다. 그리고, PVDC층을 PET층에 인라인 코팅법으로 행하는 것은, 도포량의 편차가 연신 효과에 의하여 최소화하여 박리가 절대로 일어나지 않도록 하기 위함이다. The outermost layer may be formed of K-PET coated with PVDC (Polyvinylidene Chloride) by an inline coating method on a PET substrate having a thickness of 12 μm to 13 μm. This is because K-PET is 10 times more excellent in gas barrier properties than conventional PET. At this time, the PVDC layer is expensive, and since the flexibility is inferior to use as the outermost layer, it may have an optimal gas barrier property and durability to use by coating. In addition, the PVDC layer is applied to the PET layer by an in-line coating method in order to minimize the variation in the coating amount by the stretching effect so that peeling never occurs.

한편, 전술한 두가지 특징을 동시에 얻기 위하여, 상기 최외곽층은 외면에 드러나는 K-PET와, 나일론 재질의 보호층으로 형성될 수도 있다. On the other hand, in order to obtain the above two features at the same time, the outermost layer may be formed of a protective layer of K-PET and nylon material exposed on the outer surface.

그리고, 상기 알루미늄층은 A8079 재질로 형성된다. 종래의 A1235와 본 발명에 따른 A8079의 재질 함량은 다음과 같다. The aluminum layer is made of A8079 material. The material content of the conventional A1235 and A8079 according to the present invention is as follows.

SiSi FeFe CuCu MnMn MgMg ZnZn TiTi CrCr AlAl A1235A1235 0.65↓0.65 ↓ 0.65↓0.65 ↓ 0.05↓0.05 ↓ 0.05↓0.05 ↓ 0.05↓0.05 ↓ 0.10↓0.10 ↓ 0.06↓0.06 ↓ -- 99.35 Min99.35 Min A8079A8079 0.05-0.300.05-0.30 0.70-1.300.70-1.30 0.05↓0.05 ↓ -- -- 0.10↓0.10 ↓ -- -- REMREM

즉, 종래의 A1235에 비하여 A8079는 철(Fe)의 함량이 높아 결정립이 미세화되어 제품 가공시 결정립간 슬립이 적게되어 핀 홀수가 감소되는 유리한 효과를 얻을 수 있게 된다. 또한, A8079는 철(Fe) 이외의 다른 성분의 함량 분포를 가짐에 따라, A1235에 비하여 기계적 성질인 인장 강도와 신율이 월등히 높게 된다. 따라서, 파우치를 제작하는 경우에 접히는 부분이나 접합되는 부분에 작은 크기의 균열 발생이 적어, 코어부의 밀폐 정도를 보다 향상시킬 수 있게 된다. 아울러, A8079는 재질 자체로 핀홀의 수가 적으므로 진공 단열재에 적용되는 알루미늄 박막의 용도로 적합한 장점을 갖는다. That is, compared with the conventional A1235, A8079 has a high iron (Fe) content, so that grains are refined, so that slip between grains is reduced when processing a product, and thus the pin odds can be reduced. In addition, A8079 has a content distribution of components other than iron (Fe), the mechanical strength and elongation are significantly higher than that of A1235. Therefore, when the pouch is manufactured, small cracks are generated in the folded portion and the joined portion, and the degree of sealing of the core portion can be further improved. In addition, A8079 has the advantage of being suitable for the use of the aluminum thin film applied to the vacuum insulation material because the number of pinholes in the material itself.

이 때, 상기 알루미늄층은 5㎛ 내지 10㎛ 의 두께로 형성된 것이 바람직하다. 상기 알루미늄층이 5㎛ 보다 작은 두께로 형성되면 압연 공정에서 균열이나 결함이 발생될 가능성이 커지므로 불량률이 높아지는 문제점이 발생되며, 상기 알루미늄층이 10㎛ 보다 두꺼운 두께로 형성되면 열전도도가 높은 알루미늄층을 따라 열이 전달됨으로써 오히려 단열 효과가 낮아지는 문제점이 발생된다. At this time, the aluminum layer is preferably formed to a thickness of 5㎛ 10㎛. If the aluminum layer is formed to a thickness of less than 5㎛ increase the probability of cracks or defects in the rolling process increases the defect rate is raised, if the aluminum layer is formed to a thickness of more than 10㎛ thick aluminum having high thermal conductivity As heat is transferred along the layer, a problem arises in that the heat insulation effect is lowered.

한편, 본 발명은, 강재로 형성된 냉장고 캐비넷의 외면과; 플라스틱 재질로 형성된 냉장고 캐비넷의 내면과;상기 냉장고 캐비넷의 외면과 내면 사이에 위치한 상기 진공 단열재를; 포함하여 구성된 것을 특징으로 하는 냉장고 캐비넷의 단열 구조를 제공한다. 이 때, 상기 냉장고 캐비넷의 외면과 내면 사이에 발포폼으로 형성된 냉장고 단열부를 더 포함하여 구성될 수도 있다. On the other hand, the present invention, the outer surface of the refrigerator cabinet formed of steel; An inner surface of the refrigerator cabinet formed of a plastic material; the vacuum insulating material disposed between an outer surface and an inner surface of the refrigerator cabinet; It provides an insulating structure of the refrigerator cabinet, characterized in that configured to include. At this time, the refrigerator may further include a heat insulating unit formed of foam foam between the outer surface and the inner surface of the refrigerator cabinet.

이하, 첨부 도면을 참조하여 본 발명의 일 실시예에 관하여 상세히 설명한다. Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention.

도6는 본 발명의 일 실시예에 따른 진공 단열재의 구성을 도시한 단면도, 도7는 도6의 외부 형상을 도시한 사시도, 도8은 도6의 필름의 구성을 도시한 도면, 도9은 도8의 알루미늄층의 조직을 도시한 조직도, 도10은 도8의 알루미늄층의 두께에 따른 핀홀수 분포도, 도11은 도8의 알루미늄층의 두께에 따른 강도 분포도, 도12는 도8의 알루미늄층의 두께에 따른 신율 분포도이다. Figure 6 is a cross-sectional view showing the configuration of a vacuum insulator according to an embodiment of the present invention, Figure 7 is a perspective view showing the outer shape of Figure 6, Figure 8 is a view showing the configuration of the film of Figure 6, Figure 9 is FIG. 8 is a structure diagram showing the structure of the aluminum layer of FIG. 8, FIG. 10 is a pinhole number distribution chart according to the thickness of the aluminum layer of FIG. 8, FIG. 11 is an intensity distribution chart according to the thickness of the aluminum layer of FIG. Elongation distribution according to the thickness of the layer.

도면에 도시된 바와 같이, 본 발명의 일 실시예에 따른 진공 단열재(100)는 유리 섬유로 직조된 패널이 적층되고 상기 패널의 사이가 진공으로 형성된 코어재(110)와, 코어재(110)의 진공을 유지하기 위하여 코어재(110)를 밀봉 감싸도록 형성된 밀봉 덮개(120)와, 밀봉 덮개(120)를 투과하여 유입되는 가스 성분을 제거하여 충분한 기간 동안 진공 단열재로서의 단열 성능을 유지하도록 층상(層狀)으로 코어재(110) 사이에 삽설된 게터(getter, 130)를 포함하여 구성된다. As shown in the figure, the vacuum insulator 100 according to an embodiment of the present invention is the core material 110 and the core material 110 is laminated with a panel made of glass fiber and the vacuum between the panel is laminated; The sealing cover 120 formed to seal the core material 110 to maintain the vacuum of the layer, and the layered to maintain the heat insulating performance as a vacuum insulating material for a sufficient period of time by removing the gas component flowing through the sealing cover 120 And (i) a getter 130 inserted between the core materials 110.

여기서, 상기 코어재(110)는 가장 단열 특성이 우수한 것으로 알려져 있는 유리 섬유로 형성되며, 가급적 가는 유리 섬유로 직조된 패널이 적층되어 형성되어 높은 단열 효과를 얻을 수 있다. Here, the core material 110 is formed of glass fibers that are known to have the most excellent thermal insulation properties, preferably formed by laminating panels woven with thin glass fibers, whereby a high thermal insulation effect can be obtained.

상기 밀봉 덮개(120)는 진공 단열재(100)의 외면에 드러나도록 나일론 재질로 형성된 최외곽층(121)과, 최외곽층(121)의 저면에 적층된 보호층(122)과, 보호층(122)의 저면에 적층된 알루미늄층(123)과, 알루미늄층(123)의 저면에 적층되고 코어재(110)와 접촉하는 열융착층(124)으로 구성된다. The sealing cover 120 is the outermost layer 121 formed of a nylon material to be exposed to the outer surface of the vacuum insulation material 100, the protective layer 122 laminated on the bottom surface of the outermost layer 121, and a protective layer ( An aluminum layer 123 laminated on the bottom of the 122 and a heat seal layer 124 laminated on the bottom of the aluminum layer 123 and in contact with the core material 110 are formed.

여기서, 최외곽층(121)은 신축성이 뛰어난 나일론 소재로 약 25㎛ 의 두께로 형성된다. 그리고, 보호층(122)도 역시 신축성이 뛰어난 나일론 소재로 약 15 ㎛ 의 두께로 형성된다. 이를 통해, 진공 단열재(100)의 조립이나 설치 중에 발생되는 외부의 충격에도 파손되는 것을 방지할 수 있게 된다. 특히, 최근 냉장고용 진공단열재의 효율 향상을 위하여 커다란 크기로 제작되고 있는 점을 감안한다면, 작업중에 불량이 발생되는 가능성이 점점 높아지고 있는 데, 외부의 충격이나 스크래치에 의하여 파손되는 것을 방지함으로써 불량의 가능성을 사전에 차단할 수 있게 된다. Here, the outermost layer 121 is formed of a nylon material having excellent elasticity and having a thickness of about 25 μm. The protective layer 122 is also formed of a nylon material having excellent elasticity and having a thickness of about 15 μm. Through this, it is possible to prevent damage to the external impact generated during the assembly or installation of the vacuum insulator 100. In particular, in consideration of the fact that the recent manufacture of a large size to improve the efficiency of the vacuum insulator for refrigerators, the possibility of defects during the operation is increasing increasingly, by preventing damage caused by external impact or scratches You can block the possibility in advance.

그리고, 알루미늄층(123)은 외부의 가스나 습기가 코어재(110)의 내부로 침투하는 것을 방지하기 위하여 적층 형성된 가스 차단층으로서, 7wt% 내지 1.3wt%의 철(Fe)함량을 구비한 A8000계열로, 보다 바람직하게는, A8079 소재로 형성된다. A8079 소재는, 도9에 도시된 바와 같이, 종래의 A1235에 비하여, 결정립이 미세화되어 형성됨에 따라, 결정립 사이의 슬립이 적어지게 되어, 재료 자체에서 수용할 수 있는 허용 응력이 커짐에 따라 압연 등의 가공 공정에도 견딜 수 있게 되며, 연성이 높아진다. 따라서, 본 발명에 따른 알루미늄층(123)은, 도10에 도시된 바와 같이, 두께가 10㎛ 로 형성된 경우에, 종래의 알루미늄층에 비하여 3배 이상의 내핀홀성을 갖게 된다. In addition, the aluminum layer 123 is a gas barrier layer formed in order to prevent external gas or moisture from penetrating into the core material 110. The aluminum layer 123 includes iron (Fe) content of 7 wt% to 1.3 wt%. A8000 series, More preferably, it is formed of A8079 material. As shown in Fig. 9, in the A8079 material, as compared with the conventional A1235, as the grains are miniaturized and formed, the slip between the grains decreases, and as the allowable stress acceptable in the material itself increases, rolling or the like is performed. It can withstand the processing process of, and ductility becomes high. Therefore, the aluminum layer 123 according to the present invention, as shown in FIG. 10, has a pinhole resistance three times or more than that of a conventional aluminum layer when the thickness is 10 μm.

더욱이, 도11에 도시된 바와 같이, A8079 소재는 A1235에 비하여 강도와 신율이 크게 우수하다. 따라서, A8079를 적용한 진공단열재(100)의 알루미늄층(122)은 취급시 외부로부터 가해지는 응력을 적절히 분산시킴으로써 알루미늄층(122) 내에 결함이 생성되는 것을 방지할 수 있게 된다. Furthermore, as shown in Fig. 11, the A8079 material is significantly superior in strength and elongation as compared to A1235. Therefore, the aluminum layer 122 of the vacuum insulation material 100 to which A8079 is applied can be prevented from generating defects in the aluminum layer 122 by appropriately dispersing stress applied from the outside during handling.

열융착층(124)은, 탄소(C) 수가 4개인 부틴(Butene) 베이스의 종래의 LLDPE와 달리, 탄소(C)수가 8개인 옥탄(Octane) 베이스의 LLDPE(Linear Low Density Polyethylene)로 약 50㎛의 두께로 형성되어, 보다 향상된 내열 성능과 씰링 강도를 갖는다. 그리고, 코어재(110)의 상면과 하면에 접하면서 돌출된 돌출부(120')의 열융착층(124)을 서로 접합시킴으로써, 코어재(110)의 진공도를 보다 효과적으로 유지할 수 있게 된다. The thermal bonding layer 124 is about 50 carbon (L) -based Octane-based LLDPE (Linear Low Density Polyethylene), unlike the conventional LLDPE (butene) having 4 carbon atoms. It is formed to a thickness of μm, and has improved heat resistance performance and sealing strength. Then, by bonding the heat-sealing layer 124 of the protruding portion 120 'protruding while contacting the upper and lower surfaces of the core material 110, it is possible to more effectively maintain the vacuum degree of the core material 110.

상기와 같이, 최외곽층(121), 보호층(122), 알루미늄층(123), 열융착층(124)이 적층되어 구성된 본 발명의 일 실시예에 따른 밀봉 덮개(120)는, 탄소 투과도(Oxygen permeability)가 상대 습도 0%, 섭씨 23℃ 의 환경에서 48시간 동안 0.005cc/m2의 값을 가졌으며, 투습도(water vapor transmission rate)가 상대 습도 100%, 섭씨 38℃ 의 환경에서 48시간 동안 0.005g/m2을 보임으로써, 외부로부터의 공기나 습도가 침투하는 것을 방지하는 데 우수한 성능을 가지고 있음을 확인할 수 있었다. As described above, the sealing cover 120 according to an embodiment of the present invention configured by laminating the outermost layer 121, the protective layer 122, the aluminum layer 123, and the heat sealing layer 124 has a carbon permeability. (Oxygen permeability) had a value of 0.005cc / m 2 for 48 hours in an environment of 0% relative humidity and 23 ° C, and water vapor transmission rate was 48 in an environment of 100% relative humidity and 38 ° C. By showing 0.005g / m 2 for the time, it was confirmed that the excellent performance in preventing the penetration of air or humidity from the outside.

또한, 진공 단열재(100)를 소정의 장소에 설치하는 중에 돌출부(120')를 접더라도 핀홀의 발생이 억제되므로 우수한 단열 효과를 오랜 기간 유지할 수 있다.In addition, since the occurrence of pinholes is suppressed even when the protrusion 120 'is folded while installing the vacuum insulator 100 at a predetermined place, an excellent heat insulating effect can be maintained for a long time.

이상에서는 본 발명의 바람직한 실시예를 예시적으로 설명하였으나, 본 발명의 범위는 이와 같은 특정 실시예에만 한정되는 것은 아니며, 특허청구범위에 기재된 범주 내에서 적절히 변경 가능한 것이다. Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

즉, 최외곽층은 2겹의 나일론으로 형성된 것만 예시로 설명하였으나, PVDC가 코팅된 12㎛ 내지 13㎛ 의 K-PET으로 형성됨으로써, 가스나 습도의 침투를 방지하여 구성될 수도 있으며, 전술한 각 층의 두께를 적절히 조절할 수도 있다. That is, the outermost layer has been described as an example of only two layers of nylon, but by forming a PVDC coated 12㎛ to 13㎛ K-PET, it may be configured to prevent the penetration of gas or humidity, as described above The thickness of each layer may also be appropriately adjusted.

이상 설명한 바와 같이, 본 발명에 따르면, 코어재와; 외부로 드러나는 최외곽층과, 상기 코어재와 접하는 열융착층과, 철(Fe)의 함유량이 0.7wt% 내지 1.3 wt%인 소재로 상기 최외곽층과 상기 열융착층 사이에 형성된 알루미늄층을 포함하고, 상기 코어재를 감싸도록 형성된 밀봉 덮개를 포함하여, 진공 단열재를 냉장고 의 캐비넷 내부에 설치하는 과정에서, 진공 단열재의 열봉합부가 접히더라도 핀홀의 발생을 최대한으로 억제하여, 외부의 공기나 습기가 진공 단열재의 내부로 침투하는 것을 방지함으로써, 장기간동안 우수한 단열 성능을 유지하는 진공 단열재 및 이를 적용한 냉장고 캐비넷의 단열 구조를 제공한다.As described above, according to the present invention, a core material; The outermost layer that is exposed to the outside, the heat-sealing layer in contact with the core material, and the aluminum layer formed between the outermost layer and the heat-sealing layer of a material having a content of iron (Fe) of 0.7wt% to 1.3wt% Including a sealing cover formed to surround the core material, in the process of installing the vacuum insulator inside the cabinet of the refrigerator, even if the heat sealing portion of the vacuum insulator is folded to minimize the generation of pinholes, By preventing moisture from penetrating into the interior of the vacuum insulator, a vacuum insulator which maintains excellent heat insulation performance for a long time and a heat insulation structure of a refrigerator cabinet to which the same is provided are provided.

그리고, 본 발명은 최외곽층을 2겹의 나일론 재질로 형성된 덮개 필름을 구비함에 따라, 냉장고 등의 캐비넷에 단열재로서 진공 단열재를 설치하는 공정에서 진공 단열재가 손상되거나 결함이 발생되어 단열 성능이 악화되는 것을 방지한다. In addition, according to the present invention, since the outermost layer is provided with a cover film formed of two layers of nylon, the vacuum insulating material is damaged or a defect is generated in the process of installing the vacuum insulating material as a heat insulating material in a cabinet such as a refrigerator, thereby deteriorating heat insulating performance. Prevent it.

또한, 본 발명은 열융착층을 탄소(C)가 8개의 옥탄 베이스의 LLDPE로 형성됨에 따라, 종래에 비하여 내열성과 씰링(sealing) 강도가 향상된다. In addition, according to the present invention, as the heat-sealing layer is formed of 8 octane-based LLDPE of carbon (C), heat resistance and sealing strength are improved as compared with the conventional art.

Claims (11)

코어재와; A core material; 외부로 드러나는 최외곽층과, 상기 코어재와 접하는 열융착층과, 철(Fe)의 함유량이 0.7wt% 내지 1.3 wt%인 소재로 상기 최외곽층과 상기 열융착층 사이에 형성된 알루미늄층을 포함하고, 상기 코어재를 감싸도록 형성된 밀봉 덮개를; The outermost layer that is exposed to the outside, the heat-sealing layer in contact with the core material, and the aluminum layer formed between the outermost layer and the heat-sealing layer of a material having a content of iron (Fe) of 0.7wt% to 1.3wt% A sealing cover formed to surround the core material; 포함하여 구성된 것을 특징으로 하는 진공 단열재.Vacuum insulation, characterized in that configured to include. 제 1항에 있어서,The method of claim 1, 상기 열융착층은 탄소(C)수가 8개의 옥탄 베이스의 LLDPE(Linear Low Density Polyethylene)으로 형성된 것을 특징으로 하는 진공 단열재.The heat seal layer is a vacuum insulator, characterized in that the carbon (C) is formed of 8 octane-based linear low density polyethylene (LLDPE). 코어재와; A core material; 외부로 드러나는 최외곽층과, 탄소(C)수가 8개의 옥탄 베이스의 LLDPE(Linear Low Density Polyethylene)으로 형성되고 상기 코어재와 접하도록 형성된 열융착층과, 상기 최외곽층과 상기 열융착층 사이에 형성된 알루미늄층을 포함하고, 상기 코어재를 감싸도록 형성된 밀봉 덮개를; An outermost layer that is exposed to the outside, a heat-sealing layer formed of 8 low-octane linear low density polyethylene (LLDPE) carbon atoms and contacting the core material, and between the outermost layer and the heat-sealing layer A sealing cover including an aluminum layer formed on the cover, the sealing cover being formed to surround the core material; 포함하여 구성된 것을 특징으로 하는 진공 단열재.Vacuum insulation, characterized in that configured to include. 제 3항에 있어서,The method of claim 3, 상기 알루미늄층은 철(Fe)의 함유량이 0.7wt% 내지 1.3 wt%인 소재로 형성된 것을 특징으로 하는 진공 단열재.The aluminum layer is vacuum insulating material, characterized in that the iron (Fe) content is formed of a material of 0.7wt% to 1.3wt%. 제 1항 내지 제 4항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 상기 최외곽층은 나일론 소재로 두 겹을 형성된 것을 특징으로 하는 진공 단열재.The outermost layer is a vacuum insulation, characterized in that formed of two layers of nylon material. 제 1항 내지 제 4항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 상기 최외곽층은 PET 기재와, 상기 PET 기재 상에 PVDC(Polyvinylidene Chloride)로 코팅된 K-PET으로 형성된 것을 특징으로 하는 진공 단열재.The outermost layer is a vacuum insulating material, characterized in that formed of a PET substrate, K-PET coated with PVDC (Polyvinylidene Chloride) on the PET substrate. 제 6항에 있어서,The method of claim 6, 상기 PVDC의 코팅은 인라인 코팅법에 의하여 코팅된 것을 특징으로 하는 진공 단열재.The coating of the PVDC vacuum insulation, characterized in that the coating by the in-line coating method. 제 6항에 있어서,The method of claim 6, 상기 최외곽층은 외면에 드러나는 K-PET와, 나일론 재질의 보호층으로 형성된 것을 특징으로 하는 진공 단열재.The outermost layer is a vacuum insulator, characterized in that formed of a protective layer of K-PET and nylon, which is exposed on the outer surface. 제 1항 내지 제 4항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 상기 알루미늄층은 A8079 재질로 형성된 것을 특징으로 하는 진공 단열재.The aluminum layer is vacuum insulating material, characterized in that formed of A8079 material. 제 1항 내지 제 4항 중 어느 한 항에 있어서,The method according to any one of claims 1 to 4, 상기 알루미늄층은 5㎛ 내지 10㎛ 의 두께로 형성된 것을 특징으로 하는 진공 단열재.The aluminum layer is a vacuum insulating material, characterized in that formed in a thickness of 5㎛ 10㎛. 강재로 형성된 냉장고 캐비넷의 외면과;An outer surface of the refrigerator cabinet formed of steel; 플라스틱 재질로 형성된 냉장고 캐비넷의 내면과;An inner surface of the refrigerator cabinet formed of a plastic material; 상기 냉장고 캐비넷의 외면과 내면 사이에 위치한 제1항 내지 제4항 중 어느 한 항에 따른 진공 단열재를;A vacuum insulator according to any one of claims 1 to 4 located between an outer surface and an inner surface of the refrigerator cabinet; 포함하여 구성된 것을 특징으로 하는 냉장고 캐비넷의 단열 구조.Insulation structure of a refrigerator cabinet, characterized in that configured to include.
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