阅读说明：本技术 真空隔热件 (Vacuum heat insulation piece ) 是由 葛承勋 金炯成 朴钟成 陆世元 于 2015-03-10 设计创作，主要内容包括：公开一种真空隔热件。所述真空隔热件包括：芯材；第一外皮材料,布置在所述芯材的外侧；阻断层,布置在所述芯材和所述第一外皮材料之间且贴合于所述第一外皮材料从而与所述第一外皮材料一体形成；以及第二外皮材料,具有比所述第一外皮材料的导热率高的导热率,且结合到所述第一外皮材料而形成收容所述芯材和所述阻断层的收容空间,其中,所述第一外皮材料和第二外皮材料通过熔接或粘接而彼此贴合来形成向所述收容空间的外侧方向延伸的延伸部,其中,所述阻断层防止水分和气体渗透到所述收容空间,其中,所述阻断层被设置为具有与所述芯材的上表面相同面积或比所述芯材的上表面小的面积。(A vacuum insulation panel is disclosed. The vacuum insulation member includes: a core material; a first skin material disposed outside the core material; a blocking layer disposed between the core material and the first skin material and attached to the first skin material so as to be integrally formed with the first skin material; and a second skin material having a higher thermal conductivity than that of the first skin material and bonded to the first skin material to form an accommodation space for accommodating the core material and the blocking layer, wherein the first skin material and the second skin material are attached to each other by welding or bonding to form an extension portion extending in an outside direction of the accommodation space, wherein the blocking layer prevents moisture and gas from penetrating into the accommodation space, and wherein the blocking layer is provided to have the same area as or a smaller area than an upper surface of the core material.)

1. A vacuum insulation panel comprising:

a core material;

a first skin material disposed outside the core material;

a blocking layer disposed between the core material and the first skin material and attached to the first skin material so as to be integrally formed with the first skin material; and

a second skin material having a higher thermal conductivity than that of the first skin material and bonded to the first skin material to form a housing space housing the core material and the blocking layer,

wherein the first skin material and the second skin material are bonded to each other by welding or adhesion to form an extension portion extending in an outer direction of the receiving space,

wherein the blocking layer prevents moisture and gas from penetrating into the receiving space,

wherein the blocking layer is provided to have the same area as or a smaller area than the upper surface of the core material.

2. The vacuum insulation of claim 1, wherein the extension is bent such that the first skin material is located outside of the second skin material.

3. The vacuum insulation of claim 1, wherein the first skin material comprises: the blocking layer is attached to the welding layer; and a barrier layer laminated on an outer side of the fusion-bonded layer.

4. The vacuum insulation of claim 3, wherein the second skin material comprises: a sealing layer surrounding the core material,

the fusion layer and the sealing layer are attached to each other to form the extension portion.

5. The vacuum insulation of claim 4, wherein the frit layer and the seal layer each comprise at least one of Linear Low Density Polyethylene (LLDPE) and Low Density Polyethylene (LDPE).

6. A vacuum insulation panel according to claim 3, wherein the barrier layer is provided in a plurality of barrier layers,

wherein the plurality of barrier layers comprises:

a substrate layer; and

a deposition layer facing the base material layer while blocking introduction of gas and moisture to the core material,

wherein the deposition layer comprises Al and SiO₂、Al₂O₃At least one of (a).

7. The vacuum insulation of claim 6, wherein the plurality of barrier layers further comprises: a penetration-resistant layer disposed between the fusion-bonded layer and the base material layer,

wherein the penetration resistant layer comprises at least one of ethylene vinyl alcohol copolymer (EVOH) and vacuum metallized ethylene vinyl alcohol copolymer (VM-EVOH).

8. The vacuum insulation of claim 7, wherein the plurality of barrier layers further comprises: a protective layer disposed on the deposition layer to absorb external impact,

wherein the protective layer comprises at least one of polyethylene terephthalate (PET) and nylon.

9. The vacuum insulation of claim 3, wherein the blocking layer comprises:

a first layer attached to the welded layer by welding or bonding; and

a second layer laminated on the first layer in an inner direction of the core material,

wherein the second layer includes at least one of an inorganic deposition layer and a plurality of metal layers.

10. A vacuum insulation panel comprising:

a core material;

a first skin material disposed outside the core material;

a first blocking layer disposed between the core material and the first skin material; and

a second outer skin material bonded to the first outer sheet material to form a receiving space receiving the core material and the first blocking layer,

wherein the first skin material comprises:

a fusion bonding layer facing the accommodating space along the inner side direction of the core material; and

a plurality of barrier layers including a first barrier layer and a second barrier layer, the first barrier layer being positioned outside the fusion layer, the second barrier layer being positioned outside the first barrier layer,

wherein the first barrier layer comprises: a first substrate layer surrounding the weld layer; and a first deposition layer located outside the first base material layer,

wherein the second barrier layer comprises: a second deposition layer facing the first deposition layer; and a second base material layer located outside the second deposition layer,

wherein the first blocking layer is welded or bonded to the first skin material to be integrally formed with the first skin material to prevent moisture and gas from penetrating into the receiving space,

wherein the first blocking layer is provided to have the same area as or a smaller area than the upper surface of the core material, and

wherein the first skin material and the second skin material have the same thermal conductivity as each other.

11. The vacuum insulation of claim 10, wherein the first skin material has a lower thermal conductivity than the second skin material.

12. The vacuum insulation of claim 10, wherein the first skin material comprises an aluminum deposited skin material and the second skin material comprises an aluminum foil skin material.

13. The vacuum insulation panel of claim 10, further comprising:

a second blocking layer disposed between the core material and the second skin material,

wherein the second blocking layer is welded or bonded to the second skin material to form an integral unit with the second skin material.

14. The vacuum insulation of claim 13, wherein the first skin material and the second skin material each comprise an aluminum deposited skin material.

Technical Field

The present invention relates to a vacuum insulation member and a refrigerator including the same, and more particularly, to a vacuum insulation member having an improved structure to improve insulation and durability, and a refrigerator including the same.

Background

Energy that human beings can consume is limited, and global warming caused by carbon dioxide generated by using energy is the biggest problem facing human beings together with energy crisis. Accordingly, energy regulations in various countries are increasingly strengthened, and an energy level regulation for home electric appliances is a permanent subject of manufacturers. Government energy ratings that utilize less energy to maximize efficiency are well suited to consumer needs that require high volume and low power consumption. In particular, a great deal of research has been conducted on refrigerators over the past several decades, and research on the improvement of efficiency of a cooling cycle and a compressor, a heat exchanger, etc. has reached a limit. Therefore, a major research is recently conducted on heat loss, and attempts are being made to improve energy efficiency by enhancing the heat insulation performance of the refrigerator.

The conventional heat insulating material such as polyurethane has a thermal conductivity of about 20mk/m · k, and if polyurethane is used, the thickness of the outer wall of the refrigerator becomes thick, so that the storage capacity of the refrigerator is reduced. Therefore, in order to solve the above problems, it is required to use a vacuum heat insulator having excellent heat insulating performance.

However, since the Heat Bridge phenomenon (Heat Bridge, a phenomenon in which Heat flows through the edge position of the vacuum Heat insulator) and the durability of the vacuum Heat insulator are in a conflicting relationship, there is a limit in manufacturing an effective vacuum Heat insulator.

Disclosure of Invention

Technical problem

An aspect of the present invention provides a vacuum insulation panel having an improved structure capable of effectively preventing penetration of gas and moisture, and a refrigerator including the same.

Another aspect of the present invention provides a vacuum insulation panel having an improved structure capable of preventing a heat bridge phenomenon and improving durability, and a refrigerator including the same.

Still another aspect of the present invention provides a vacuum insulation panel having an improved structure capable of reducing a volume, and a refrigerator including the same.

Technical scheme

The vacuum insulation panel according to the idea of the present invention is characterized by comprising: core Material (Core Material); a first skin material disposed outside the core material; a blocking layer disposed between the core material and the first skin material; and a second outer skin material bonded to the first outer skin material to form a receiving space therein for receiving the core material and the blocking layer, wherein the blocking layer is integrated with the first outer skin material by being welded or bonded to the first outer skin material.

The first skin material and the second skin material may have thermal conductivities different from each other.

The first skin material may have a lower thermal conductivity than the second skin material.

The first skin material may comprise an aluminum deposited skin material and the second skin material comprises an aluminum foil skin material.

The vacuum insulation panel according to the idea of the present invention is characterized by further comprising: a stopper layer disposed between the core material and the second skin material, the stopper layer being integrated with the second skin material by being welded or bonded to the second skin material.

The first skin material and the second skin material may include an aluminum deposited skin material.

The first skin material may include: a first region formed along an edge location of the first skin material; and a second region formed inside the first region, wherein the blocking layer is attached to the second region.

The blocking layer may also be attached to at least a portion of the first region.

The second region may include a bent portion bent at an edge position of the core material.

The first skin material may have a higher thermal conductivity than the second skin material, and the first region is bent such that the second skin material is located between the core material and the first region.

The blocking layer may have the same width as the core material.

The blocking layer may have a smaller width than the core material.

The first skin material may include: and a fusion bonding layer facing the receiving space toward the inner side of the core material.

The second skin material may include: and a sealing layer facing the receiving space toward an inner side of the core material.

The first skin material may include: a fusion-bonded layer facing the receiving space in an inner direction of the core material, the second skin material including: and a sealing layer facing the receiving space in an inner direction of the core material, wherein the fusion-bonded layer and the sealing layer may be bonded to each other by fusion bonding or adhesion at least at a portion of the first region.

The fusion layer and the sealing layer may include at least one of Linear Low-Density Polyethylene (LLDPE) and Low-Density Polyethylene (LDPE).

The blocking layer may include: the basic unit, with the butt fusion layer is in opposite directions to laminate to the butt fusion layer, the basic unit can laminate through butt fusion or bonding to the butt fusion layer.

The blocking layer may further include at least one of at least one metal layer and an inorganic deposition layer laminated on the base layer toward the core material.

The blocking layer may include: and the metal layer is opposite to the welding layer and is attached to the welding layer.

The first skin material may further include: at least one barrier layer disposed on the fusion layer toward an outer side of the core material.

The at least one barrier layer may include: a substrate layer; a deposition layer provided on the substrate layer to block gas and moisture flowing into the core material, wherein the deposition layer includes Al, SiO₂、Al₂O₃At least one of (a).

The at least one barrier layer may further include: and a penetration-proof layer provided between the fusion-bonding layer and the substrate layer, wherein the penetration-proof layer may include at least one of Ethylene Vinyl Alcohol copolymer (EVOH) and Vacuum Metalized-Ethylene Vinyl Alcohol copolymer (VM-EVOH).

The vacuum insulation member according to the idea of the present invention may include: core Material (Core Material); a first skin material disposed outside the core material; a blocking layer disposed between the core material and the first skin material and bonded to the first skin material in such a manner as to be integrated with the first skin material; and a second skin material having a higher thermal conductivity than the first skin material and bonded to the first skin material to form an accommodating space for accommodating the core material and the blocking layer therein, wherein the first skin material and the second skin material are bonded to each other by welding or adhesion to form an extending portion extending in an outer direction of the accommodating space.

The extension may be bent such that the first skin material is located outside the second skin material.

The first skin material may include: a welding layer, which is attached with the blocking layer; and a barrier layer laminated on the outside of the fusion-bonded layer.

The second skin material may include a sealing layer surrounding the core material, and the welding layer and the sealing layer may be attached to each other to form the extension portion.

The fusion layer and the sealing layer may include at least one of Linear Low-Density Polyethylene (LLDPE) and Low-Density Polyethylene (LDPE).

The barrier layer may be formed of a plurality of barrier layers including: a substrate layer; a deposition layer disposed opposite to the substrate layer to block gas and moisture flowing into the core material, wherein the deposition layer may include Al, SiO₂、Al₂O₃At least one of (a).

The plurality of barrier layers may further include: and a penetration-proof layer provided between the fusion-bonding layer and the substrate layer, wherein the penetration-proof layer may include at least one of Ethylene Vinyl Alcohol copolymer (EVOH) and Vacuum Metalized-Ethylene Vinyl Alcohol copolymer (VM-EVOH).

The plurality of barrier layers may further include a protective layer provided on the deposition layer to absorb an external impact, and the protective layer may include at least one of Polyethylene terephthalate (PET) and nylon.

The blocking layer may include: a first layer attached to the welded layer by welding or bonding; and a second layer laminated on the first layer toward an inner side of the core material, wherein the second layer may include at least one of an inorganic deposition layer and a plurality of metal layers.

The refrigerator according to the idea of the present invention may include: an outer case forming an appearance; an inner box provided inside the outer box and forming a storage chamber; a vacuum insulation member located between the outer box and the inner box, wherein the vacuum insulation member comprises: core Material (Core Material); a first outer skin material disposed on an outer side of the core material so as to face an inner surface of the outer case; a blocking layer disposed between the core material and the first skin material and bonded to the first skin material in such a manner as to be integrated with the first skin material; and a second outer skin material having a higher thermal conductivity than the first outer skin material, bonded to the first outer skin material so as to face the outer surface of the inner box, and forming a receiving space for receiving the core material and the blocking layer therein, wherein the second outer skin material is bonded to the inner box along an edge of the first outer skin material by welding or bonding.

The first skin material may be bonded to an inner surface of the outer carton.

The vacuum insulation member according to the idea of the present invention may include: core Material (Core Material); a first skin material disposed outside the core material; a second skin material having a thermal conductivity different from that of the first skin material and bonded to the first skin material to form a receiving space for receiving the core material therein; an extension portion provided to extend in an outer direction of the housing space; wherein the first skin material and the second skin material may be attached to each other throughout the extension portion by welding or bonding.

The extension portion may connect a first position formed at an outermost position where the first skin material and the second skin material are attached to each other in an outer direction of the housing space and a second position formed at a position where the extension portion and the core material are in contact with each other.

The first skin material may have a lower thermal conductivity than the second skin material.

The first skin material may include an aluminum deposited skin material and the second skin material may include an aluminum foil skin material.

The first skin material and the second skin material may include bonding layers facing the receiving space toward the inside of the core material, respectively, and the bonding layers of the first skin material and the second skin material may be bonded to each other by welding or adhesion.

The bonding layer includes at least one of Linear Low-Density Polyethylene (LLDPE) and Low-Density Polyethylene (LDPE).

The vacuum insulation panel according to the idea of the present invention may further include: a blocking layer disposed between the core material and at least one of the first skin material and the second skin material.

The blocking layer may be attached to at least one of the first skin material and the second skin material to be integrated with one of the first skin material and the second skin material.

The blocking layer may have the same width as or a smaller width than the core material.

The blocking layer may have a width greater than that of the core material.

The extension portion may connect a first position formed at an outermost position where the first skin material and the second skin material are attached to each other in an outer direction of the receiving space and a second position formed at a position where the extension portion and the core material are in contact with each other, and at least one end portion of the blocking layer extending in the outer direction of the receiving space is located between the first position and the second position.

The vacuum insulation panel according to the idea of the present invention may further include: a blocking layer disposed between one of the first and second skin materials having a low thermal conductivity and the core material.

A vacuum insulation panel according to an idea of the present invention may include: a core material; a first skin material disposed outside the core material; a blocking layer disposed between the core material and the first skin material and attached to the first skin material so as to be integrally formed with the first skin material; and a second skin material having a higher thermal conductivity than that of the first skin material and bonded to the first skin material to form an accommodation space for accommodating the core material and the blocking layer, wherein the first skin material and the second skin material are attached to each other by welding or bonding to form an extension portion extending in an outside direction of the accommodation space, wherein the blocking layer prevents moisture and gas from penetrating into the accommodation space, and wherein the blocking layer is provided to have the same area as or a smaller area than an upper surface of the core material.

A vacuum insulation panel according to an idea of the present invention may include: a vacuum insulation panel comprising: a core material; a first skin material disposed outside the core material; a first blocking layer disposed between the core material and the first skin material; and a second skin material bonded to the first skin material to form a receiving space receiving the core material and the first blocking layer, wherein the first skin material includes: a fusion bonding layer facing the accommodating space along the inner side direction of the core material; and a plurality of barrier layers including a first barrier layer and a second barrier layer, the first barrier layer being located outside the fusion layer, the second barrier layer being located outside the first barrier layer, wherein the first barrier layer includes: a first substrate layer surrounding the weld layer; and a first deposition layer located outside the first substrate layer, wherein the second barrier layer includes: a second deposition layer facing the first deposition layer; and a second substrate layer located at an outer side of the second deposition layer, wherein the first blocking layer is welded or bonded to the first skin material to be integrally formed with the first skin material to prevent moisture and gas from penetrating into the receiving space, wherein the first blocking layer is provided to have the same area as or a smaller area than an upper surface of the core material, and wherein the first skin material and the second skin material have the same thermal conductivity as each other.

Advantageous effects

The first skin material and the second skin material are bonded by welding or bonding, so that the durability of the vacuum heat insulating material can be improved.

By using a Hybrid (Hybrid) skin material in which a first skin material and a second skin material having thermal conductivity coefficients different from each other are attached, a thermal bridge phenomenon can be effectively prevented.

By arranging the blocking layer between the core material and the first skin material in such a manner as to be attached to the first skin material, the degree of penetration of gas and moisture can be reduced.

By using a vacuum heat insulating member having excellent heat insulating properties between the outer case and the inner case of the refrigerator, a slim design of the refrigerator can be achieved, and at the same time, the storage capacity of the refrigerator can be increased.

Drawings

Fig. 1 is a perspective view illustrating an appearance of a refrigerator according to an embodiment of the present invention.

Fig. 2 is a sectional view illustrating a refrigerator according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view showing a part of fig. 2 in an enlarged manner.

Fig. 4 is a perspective view illustrating a vacuum insulation panel according to an embodiment of the present invention.

Fig. 5 is a perspective view illustrating a state before the first skin material and the second skin material of the vacuum insulation panel according to an embodiment of the present invention are combined.

Fig. 6 is a sectional view illustrating a state before bending of an extension of a vacuum insulation panel according to an embodiment of the present invention.

Fig. 7 is an enlarged cross-sectional view illustrating a first skin material of a vacuum insulation panel according to an embodiment of the present invention.

Fig. 8 is an enlarged cross-sectional view of a portion Q of the vacuum insulation panel of fig. 6.

Fig. 9 is an enlarged cross-sectional view illustrating a first skin material of a vacuum insulation panel according to another embodiment of the present invention.

Fig. 10 is an enlarged cross-sectional view illustrating a second skin material of a vacuum insulation panel according to an embodiment of the present invention.

Fig. 11 is an enlarged sectional view illustrating an extension of a vacuum insulation member according to an embodiment of the present invention.

Fig. 12 is a sectional view showing a state where an extension part of a vacuum insulation panel according to an embodiment of the present invention is bent.

Fig. 13 is a sectional view showing a state where an extension of a vacuum insulation panel according to another embodiment of the present invention is before bending.

Fig. 14 is a sectional view showing a state where an extended portion of a vacuum insulation panel according to another embodiment of the present invention is bent.

Fig. 15 is a sectional view showing a state before bending of an extension of a vacuum insulation panel according to still another embodiment of the present invention.

Detailed Description

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In addition, terms such as "front end", "rear end", "upper", "lower", "upper end", and "lower end" used in the following description are defined with reference to the drawings, and the shape and position of each constituent element should not be limited by these terms.

Fig. 1 is a perspective view illustrating an external appearance of a refrigerator according to an embodiment of the present invention, fig. 2 is a sectional view illustrating the refrigerator according to the embodiment of the present invention, fig. 3 is a sectional view enlargedly illustrating a part of fig. 2, and fig. 4 is a perspective view illustrating a vacuum insulation according to the embodiment of the present invention.

As shown in fig. 1 to 4, the refrigerator 1 may include: a main body 10 forming an external appearance of the refrigerator 1; and a storage chamber 20 provided in the main body 10 so as to be open at the front surface.

The main body 10 includes an inner case 11 forming the storage compartment 20 and an outer case 13 forming an external appearance, and may include a cold air supply device supplying cold air to the storage compartment 20.

The cool air supplying apparatus may include a compressor C, a condenser (not shown), an expansion valve (not shown), an evaporator 26, a blowing fan 27, etc., and a foaming heat insulating material 15 may be foamed between the inner case 11 and the outer case 13 of the main body 10 to prevent the cool air of the storage chamber 20 from flowing out.

A machine chamber 23 may be provided at a rear lower side of the main body 10, and a compressor C and a condenser for compressing a refrigerant and condensing the compressed refrigerant may be provided in the machine chamber 23.

The storage chamber 20 is partitioned into left and right by a partition 17, and may be provided with a refrigerating chamber 21 at a right side of the main body 10 and a freezing chamber 22 at a left side of the main body 10.

The refrigerator 1 may further include a door 30 for opening and closing the storage chamber 20.

The refrigerating chamber 21 and the freezing chamber 22 are opened and closed by a refrigerating chamber door 31 and a freezing chamber door 33, respectively, the refrigerating chamber door 31 and the freezing chamber door 33 are coupled to the main body 10 to be rotatable with respect to the main body 10, respectively, and a plurality of shelves 35 may be provided on the rear surfaces of the refrigerating chamber door 31 and the freezing chamber door 33, the shelves 35 being capable of receiving foods and the like.

The storage compartment 20 may be provided with a plurality of racks 24 to divide the storage compartment 20 into a plurality of compartments, and food or the like may be stacked on the upper portions of the racks 24.

Also, a plurality of storage boxes 25 may be provided in the storage chamber 20 to be drawn in and out in a sliding manner.

The refrigerator 1 may further include a hinge module 40, the hinge module 40 including an upper hinge 41 and a lower hinge 43 rotatably coupling the door 30 to the main body 10.

A foaming space S is formed between the inner box 11 forming the storage chamber 20 and the outer box 13 coupled to the outside of the inner box 11 to form an external appearance, and the foaming space S is filled with a foaming heat insulating material 15.

In order to enhance the heat Insulation of the foamed heat insulating material 15, a Vacuum Insulation Panel (VIP) 100 may be filled together with the foamed heat insulating material 15.

The vacuum heat insulator 100 is composed of a Core Material (Core Material)110 and skin materials 130 and 140, and the skin materials 130 and 140 are very important components for blocking fine gas and moisture penetrating into the vacuum state, thereby maintaining the life of the vacuum heat insulator 100.

The skin materials 130, 140 of the vacuum insulation 100 may include a first skin material 130 and a second skin material 140.

The first skin material 130 may be disposed outside the core material 110, and the second skin material 140 may be combined with the first skin material 130 to form an accommodating space 160 accommodating the core material 110 therein.

The first skin material 130 and the second skin material 140 may be attached to each other by welding or bonding. When the first skin material 130 and the second skin material 140 are bonded to each other by welding or bonding, gaps or passages through which at least one of gas and moisture can move can be closed, and thus at least one of gas and moisture can be made difficult to permeate into the core material 110. Therefore, the durability of the vacuum insulation panel 100 can be improved. Further, since the first skin material 130 and the second skin material 140 are bonded by welding or bonding, the productivity of the vacuum heat insulator 100 can be improved. That is, when the outer skin materials 130 and 140 of the vacuum heat insulator 100 are damaged, it is generally difficult to maintain the vacuum state of the storage space 160 in which the core 110 is stored. However, in the case where the first skin material 130 and the second skin material 140 are bonded to each other by welding or adhesion, even if the skin materials 130 and 140 of the vacuum heat insulator 100 are damaged during the manufacturing process, the vacuum state of the housing space 160 housing the core 110 can be maintained.

The first skin material 130 and the second skin material 140 may have the same or different thermal conductivity from each other.

In the case where the first and second skin materials 130 and 140 have thermal conductivities different from each other, the first skin material 130 having a low thermal conductivity may be disposed outside the core material 110 so as to face the inner surface 13a of the outer case 13. The second skin material 140 having a high thermal conductivity may be disposed at the outside of the core material 110 in such a manner as to face the outer surface 11a of the inner case 11, and the second skin material 140 may be combined with the first skin material 130 to form the receiving space 160 receiving the core material 110.

The first skin material 130 may be adhered to the inner surface 13a of the outer case 13. By bonding the first skin material 130 having a low thermal conductivity to the inner surface 13a of the outer box 13, not only the heat insulating performance can be improved, but also external moisture and gas can be prevented from flowing into the inside of the vacuum heat insulator 100. Further, since the outer surface of the first outer skin material 130 facing the inner surface 13a of the outer box 13 is flat, it can be easily bonded to the inner surface 13a of the outer box 13. The extension part 150 (refer to fig. 6, 12) formed by bonding the first and second skin materials 130 and 140 to each other is bent toward the inner case 11 so that the first skin material 130 having a low thermal conductivity is positioned outside the second skin material 140, so that the outer surface of the second skin material 140 may be uneven.

However, the first outer skin material 130 is not necessarily bonded to the inner surface 13a of the outer box 13, and the second outer skin material 140 may be bonded to the inner surface 13a of the outer box 13 instead of the first outer skin material 130.

Fig. 5 is a perspective view illustrating a state before the first skin material and the second skin material of the vacuum insulation panel according to an embodiment of the present invention are combined. Fig. 6 is a sectional view illustrating a state before bending of an extension of a vacuum insulation panel according to an embodiment of the present invention. Fig. 7 is an enlarged cross-sectional view illustrating a first skin material of a vacuum insulation panel according to an embodiment of the present invention. Fig. 8 is an enlarged cross-sectional view of a portion Q of the vacuum insulation panel of fig. 6. Fig. 9 is an enlarged cross-sectional view illustrating a first skin material of a vacuum insulation panel according to another embodiment of the present invention. Fig. 10 is an enlarged cross-sectional view illustrating a second skin material of a vacuum insulation panel according to an embodiment of the present invention. Fig. 11 is an enlarged sectional view illustrating an extension of a vacuum insulation member according to an embodiment of the present invention. In fig. 5 to 11, description will be made centering on a case where the first skin material 130 and the second skin material 140 have thermal conductivity coefficients different from each other. The following will be described as an example: the first skin material 130 is a skin material in which penetration of gas and moisture is relatively easy, and the second skin material 140 is a skin material in which penetration of gas and moisture is relatively difficult. Also, the blocking layer 170 includes a block layer (barrier layer). That is, the blocking layer means the blocking layer 170 disposed between the core material 110 and the second skin material 140.

The first skin material 130 may include a metal deposition skin material and the second skin material 140 may include an aluminum foil skin material. Hereinafter, for convenience of explanation, it is considered that the first skin material 130 represents a metal deposition skin material and the second skin material 140 represents an aluminum foil skin material. The metal deposition skin material comprises an aluminum deposition skin material. The aluminum foil sheath material has poor moisture and gas permeability, but may have a reduced Heat insulating performance due to the generation of a Heat Bridge phenomenon (a phenomenon in which Heat flows through the edge position of the vacuum insulation member). In contrast, the metal deposition skin material has a thinner metal layer than the aluminum foil skin material, and thus can prevent the thermal bridge phenomenon, but may cause a reduction in durability because of strong penetration of moisture and gas. Hereinafter, the vacuum insulation panel 100 according to the present invention will be described, which improves durability while preventing a thermal bridge phenomenon by compensating for the above-mentioned disadvantages of the metal deposition skin material and the aluminum foil skin material.

Hereinafter, "upper" indicates an outward surface of the vacuum heat insulator, and "lower" indicates an inward surface of the vacuum heat insulator, that is, a surface facing a core material of the vacuum heat insulator. Reference is made to fig. 1 to 4 without reference symbols.

As shown in fig. 5 to 11, the vacuum insulation panel 100 may include: a Core Material (Core Material)110, a first skin Material 130, and a second skin Material 140.

The core material 110 may include Glass Fiber (Glass Fiber) having excellent heat insulation properties. It is necessary to form a laminate structure of panels woven from glass fibers as fine as possible to obtain a high insulation effect. Specifically, the smaller the gap (Pore Size) between the glass fibers, the easier it is to minimize the influence of Radiation (Radiation) as the heat insulating property, and thus a high heat insulating effect can be expected.

The core material 110 may be formed of only glass fibers.

The first skin material 130 may be disposed on one surface of the core material 110, and the second skin material 140 may be disposed on the other surface of the core material 110, thereby forming a receiving space 160 receiving the core material 110 therein in combination with the first skin material 130.

The kinds of the first skin material 130 and the second skin material 140 may be different.

Also, the first skin material 130 and the second skin material 140 may be formed of different materials from each other.

Also, the first skin material 130 and the second skin material 140 may have different thicknesses from each other.

Also, the first skin material 130 and the second skin material 140 may have a laminate structure different from each other. Specifically, the layers (layers) respectively constituting the first skin material 130 and the second skin material 140 may be different. Even if the layers constituting the first skin material 130 and the second skin material 140 are the same, the arrangement of the layers may be different.

Also, the first skin material 130 and the second skin material 140 may have different number of stacked layers from each other. Even if the kinds of the first and second skin materials 130 and 140 are the same, the number of layers (layers) of the first and second skin materials 130 and 140 may be different from each other.

The first and second skin materials 130 and 140 may be combined with each other to form an extension part 150 extending in an outer direction of the receiving space 160. The extension part 150 may be formed to extend in an outer direction from both side surfaces of the core material 110. The first skin material 130 and the second skin material 140 may be attached to each other at the extension part 150 to maintain the vacuum state of the receiving space 160 receiving the core 110.

The first skin material 130 and the second skin material 140 may be attached to each other at least a portion of the extension portion 150 by welding or bonding. Preferably, the first skin material 130 and the second skin material 140 may be attached to each other by welding or bonding throughout the extension part 150.

The first skin material 130 may include a first region 131 and a second region 132.

The first region 131 may be formed along an edge position of the first skin material 130. The second region 132 may be formed inside the first region 131.

The second region 132 may have a quadrangular shape, but is not limited thereto.

The second region 132 may include a bent portion 132a bent at an edge position of the core material 110.

The second skin material 140 may include an edge location portion 145 and a central portion 146.

The edge position part 145 may be formed along an edge position of the second skin material 140. The central portion 146 may be formed inside the edge position portion 145.

The edge position part 145 may correspond to the first region 131. The central portion 146 may correspond to the second region 132. But instead. The correspondence relationship between the edge position portions 145 and the central portion 146 is not limited thereto.

The central portion 146 may have a quadrangular shape, but is not limited thereto.

The central portion 146 may have a bent portion 132b bent at an edge position of the core material 110. The bent portion 132b of the second skin material 140 may correspond to the bent portion 132a of the first skin material 130, but is not limited thereto.

The second skin material 140 may be attached to the first region 131 in such a manner as to form the closed receiving space 160. Specifically, the edge position portion 145 of the second skin material 140 may be attached to the first region 131 to form a receiving space 160 having a closed circumference. The edge position portion 145 of the second skin material 140 may be attached to the first region 131 by welding or bonding.

The welding may include heat welding with heating.

The first region 131 of the first skin material 130 and the edge position portion 145 of the second skin material 140 may be attached to form an extension portion 150 extending in an outer direction of the receiving space 160.

The first region 131 may form a boundary 139 with the second region 132 at a position corresponding to a position of 1cm or more and 2cm or less from the outer boundary 138 of the first skin material 130 toward the inner direction of the first region 131. That is, the extension portion 150 may have a width of 1cm or more and 2cm or less in an inner direction of the housing space 160. However, the width of the extension 150 is not limited thereto.

The extension 150 may include an interval connecting the first position a and the second position B. The first position a may be formed at a position where the edge position of the first skin material 130 is attached to the edge position of the second skin material 140 corresponding to the edge position of the first skin material 130. The second position B may be located in a direction from the first position a toward the inside of the housing space 160 so as to face the core 110. In particular, the amount of the solvent to be used,

the first location a may be formed where the outer boundary 138 of the first area 131 is attached to the outer boundary 138a of the second skin material 140 corresponding to the outer boundary 138 of the first area 131. That is, the first position a may be formed at a position where the outermost profile end of the first skin material 130 and the outermost profile end of the second skin material 140 meet each other in an outer direction of the receiving space 160.

The second position B may be formed at a position where the first region 131 is attached to the boundary 139 of the second region 132 and the edge position portion 145 of the second skin material 140 corresponding to the boundary 139. That is, the second position B may be formed at a position where the boundary 139 of the first skin material 130 and the boundary 139a of the second skin material 140 corresponding to the boundary 139 are attached. The boundary 139a of the second skin material 140 may be formed between the edge position portion 145 and the central portion 146 in such a manner that the edge position portion 145 and the central portion 146 can be divided. The second position B may face the core 110 accommodated in the accommodating space 160. In other words, the first position a may be formed at a position where the first and second skin materials 130 and 140 are along the most outer contour of the fit in the outer direction of the receiving space 160, and the second position B may be formed at a position where the extension portion 150 and the core 110 are in contact. The extending portion connecting the first position a and the second position B is bonded by welding or bonding, so that the penetration amount of moisture and gas penetrating into the housing space 160 can be reduced.

In the process of forming the extension 150 of the vacuum insulation panel 100, wrinkles may be generated in at least one of the first skin material 130 and the second skin material 140. Therefore, a joint portion where the welding layers 133 of the adjacent first skin materials 130 are joined to each other may be formed in the first skin material 130. Also, the second skin material 140 may form a joint portion where the sealing layers 141 of the adjacent second skin materials 140 are joined to each other.

The bonding portion of one of the first and second skin materials 130 and 140 may be formed to reduce the amount of moisture and gas penetrating into the receiving space 160, similar to the extension portion 150 formed by bonding by welding or bonding.

The vacuum insulation 100 may include a blocking layer 170.

The blocking layer 170 may be disposed between at least one of the first and second skin materials 130 and 140 and the core material 110 to prevent moisture and gas from penetrating into the inside of the receiving space 160.

Preferably, the blocking layer 170 may be disposed on the inner surface of the skin material 130, 140 where penetration of gas and moisture is relatively easy. That is, the blocking layer 170 may be disposed between the core material 110 and the first skin material 130 to prevent gas and moisture from penetrating into the inside of the receiving space 160 through the first skin material 130.

The blocking layer 170 is accommodated inside the accommodating space 160 together with the core material 110, and may be attached to at least one of the first and second skin materials 130 and 140 to be integrated with at least one of the first and second skin materials 130 and 140.

Preferably, the blocking layer 170 may be attached to the first skin material 130 to be integrated with the first skin material 130.

The blocking layer 170 may be attached to the second region 132 of the first skin material 130.

Also, the blocking layer 170 may be attached to the inside of the second region 132 of the first skin material 130. In one example, the blocking layer 170 may be attached to the inner side of the bent portion 132a of the first skin material 130.

Also, the blocking layer 170 may be attached to a portion of the second region 132 and the first region 131. In one example, the blocking layer 170 may be attached by joining the second region 132 and a portion of the first portion 131 in a manner that includes a boundary 139.

The blocking layer 170 may have the same width as the core material 110 or a smaller width than the core material 110 when the types of the first skin material 130 and the second skin material 140 are different. In one example, the blocking layer 170 may have the same or a smaller width than the core material 110 in the case where the first skin material 130 is composed of a metal deposition skin material and the second skin material 140 is composed of an aluminum foil skin material.

The blocking layer 170 may have the same width as the core material 110. Specifically, the core material 110 may include an upper surface 111 facing the blocking layer 170, and the blocking layer 170 may have the same area as the upper surface 111 of the core material 110.

The blocking layer 170 may have a smaller width than the core material 110. Specifically, the blocking layer 170 may have a smaller area than the upper surface 111 of the core material 110.

This is because the characteristics of the barrier layer 170 may cause a Heat Bridge phenomenon in the case where the barrier layer 170 has a larger cross-sectional area than the core material 110.

In the case where the kinds of the first and second skin materials 130 and 140 are the same, the blocking layer 170 may be omitted or have a width greater than that of the core material 110.

In the case where the first skin material 130 and the second skin material 140 are formed of the aluminum foil skin material regardless of the number of lamination layers, the blocking layer 170 may be omitted. In other words, in the case where both the first skin material 130 and the second skin material 140 are formed of the aluminum foil skin material, the blocking layer 170 may be omitted regardless of whether the first skin material 130 and the second skin material 140 have the same number of lamination layers or the number of lamination layers different from each other. This is because the penetration of gas and moisture is relatively difficult for the aluminum foil skin material.

The blocking layer 170 may have a width greater than that of the core material 110. Specifically, the blocking layer 170 may have a larger area than the upper surface 111 of the core material 110 in the case of being composed of the metal deposition skin material regardless of whether the first skin material 130 and the second skin material 140 have the same lamination number or different lamination numbers from each other. That is, in the case where the first and second skin materials 130 and 140 are composed of a metal deposition skin material having relatively easy gas and moisture penetration but low thermal conductivity, the blocking layer 170 may have a larger width than the core material 110. At this time, at least a portion of the blocking layer 170 facing the outer side of the receiving space 160 may be located at the extension portion 150. Specifically, at least one end of the blocking layer 170 facing the outside of the receiving space 160 may be located between the first position a and the second position B.

On the other hand, the blocking layer 110 may have a sufficient width to cover the upper surface 111 of the core material 110 and at least a part of the side surface of the core material 110. As an example, in the case where the first skin material 130 is composed of a metal deposition skin material and the second skin material 140 is composed of an aluminum foil skin material, the blocking layer 170 may be disposed between the first skin material 130 and the core material 110, through which penetration of gas and moisture is relatively easy. The blocking layer 170 may be welded or bonded to the first skin material 130. Also, the blocking layer 170 may be bent together with the first skin material 130 to extend to the extension part 150. Specifically, at least a portion of the blocking layer 170 facing the outside of the receiving space 160 may be located between the first position a and the second position B. In this case, the blocking layer 170 can effectively block not only the gas and moisture permeating toward the upper surface 111 of the core 110 but also the gas and moisture permeating toward the side surface or the edge of the core 110, and thus the heat insulating performance of the vacuum heat insulator 100 can be improved.

The blocking layer 170 may be attached to at least one of the first skin material 130 and the second skin material 140 by welding or bonding.

Preferably, the blocking layer 170 is attached to the first skin material 130 by welding or bonding.

The welding may include heat welding with heating.

The blocking layer 170 may be inserted into the receiving space 160 together with the core material 110 in such a manner as to face the first skin material 130. The blocking layer 170 inserted into the receiving space 160 may be welded or soldered to the first skin material 130 through a heat treatment process applied from the outside of the vacuum insulation panel 100.

In the case where the blocking layer 170 is attached to the inner surface or the outer surface of the first skin material 130 using a special adhesive, gas or the like generated from the adhesive may permeate into the receiving space 160, thereby causing a vacuum state of the receiving space 160 to be broken or causing high cost in actual manufacturing.

The blocking layer 170 may include at least one of a metal foil, an inorganic deposition film, and a polymer resin.

The blocking layer 170 may have the same width as the second region 132 or a smaller width than the second region 132.

The blocking layer 170 may include a base layer (first layer) (not shown) attached to the second region 132 of the first skin material 130. The base layer may be attached to the second region 132 by welding or adhesive.

The blocking layer 170 may include at least one metal layer (not shown) and at least one (second layer) of inorganic deposition layers (not shown). The inorganic deposition layer means a layer deposited with an inorganic substance.

Hereinafter, the base layer may be used in the same meaning as the first layer, and the second layer may be used in the same meaning as at least one of the at least one metal layer and the inorganic deposition layer.

At least one of at least one metal layer and an inorganic deposition layer may be laminated on the base layer toward the core material 110. That is, at least one of the at least one metal layer and the inorganic deposition layer may be disposed at a lower portion of the base layer.

Specifically, the blocking layer 170 may have a structure in which the base layer 110 attached to the second region 132 and at least one metal layer located at a lower portion of the base layer toward the core material 110 are stacked.

Alternatively, the blocking layer 170 may have a structure in which the base layer 110 attached to the second region 132 and at least one inorganic deposition layer located at a lower portion of the base layer toward the core material 110 are stacked.

The blocking layer 170 may have a structure in which the base layer 110 attached to the second region 132 and at least one metal layer and an inorganic deposition layer located at a lower portion of the base layer toward the core material 110 are stacked. The stacking order of the at least one metal layer and the inorganic deposition layer may be variously changed.

The blocking layer 170 may include only at least one metal layer. In the case where the blocking layer 170 is composed of only at least one metal layer, the at least one metal layer faces the second region 132 and may be attached to the second region 132.

The first skin material 130 may include a fusion layer 133 and at least one barrier layer 180.

The fusion-bonded layer 133 may face the receiving space 160 toward the inner side of the core 110. The frit layer 133 may include at least one of Linear Low-Density Polyethylene (LLDPE), Low-Density Polyethylene (LDPE), High-Density Polyethylene (HDPE), and cast Polypropylene (CPP) having excellent sealability (Sealing). Preferably, the fusion-bonded layer 133 may include at least one of Linear Low-Density Polyethylene (LLDPE) and Low-Density Polyethylene (LDPE). This is because the blocking layer 170 is easily bonded by the applied heat in the process of attaching the blocking layer to the second region 132. Easy adhesion means adhesion at an optimum temperature that does not inhibit other constituent elements of the skin material.

The welding layer 133 may be formed in a film form.

At least one barrier layer 180 may be laminated on top of the frit layer 133 and may include a substrate layer 134 and a deposition layer 135.

The substrate layer 134 may include at least one of Polyethylene terephthalate (PET), Vacuum Metalized Polyethylene terephthalate (VMPET), Ethylene Vinyl Alcohol (EVOH), and Nylon (Nylon).

The deposition layer 135 may be provided on the base material layer 134 to block gas and moisture flowing into the core material 110.

The deposition layer 135 may be formed by physical deposition including vacuum deposition (evaporation), Sputtering (Sputtering), and Aerosol deposition (Aerosol deposition), or Chemical deposition including Chemical Vapor Deposition (CVD).

The deposition layer 135 may comprise Al, SiO₂And Al₂O₃At least one of (a). That is, Al and SiO may be deposited on the deposition layer 135₂And Al₂O₃At least one of (a).

The deposition layer 135 may include various kinds of alumina and is not limited to Al₂O₃。

The at least one barrier layer 180 may include a first barrier layer 180a, a second barrier layer 180b, and a third barrier layer 180 c. In this case, the first barrier layer 180a positioned on the upper portion of the fusion-bonded layer 133 in such a manner as to face the fusion-bonded layer 133 may include a first base material layer 134a wrapping the fusion-bonded layer 133 and a first deposition layer 135a disposed on the upper portion of the first base material layer 134 a.

The second barrier layer 180b is positioned on the upper portion of the first barrier layer 180a in such a manner as to face the first barrier layer 180a, and the second barrier layer 180b may include a second base material layer 134b positioned on the upper side of the first deposition layer 135a and a second deposition layer 135b positioned between the first deposition layer 135a and the second base material layer 134 b. That is, the second barrier layer 180b may be stacked on the first barrier layer 180a such that the first deposition layer 135a and the second deposition layer 135b face each other.

The third barrier layer 180c positioned on the upper portion of the second barrier layer 180b may include: a third deposition layer 135c provided on the upper portion of the second base material layer 134b, and a third base material layer 134c positioned on the upper portion of the third deposition layer 135 c.

The reason why the second barrier layer 180b is laminated on the upper portion of the first barrier layer 180a in such a manner that the first deposition layer 135a and the second deposition layer 135b face each other is to prevent cracks (Crack) from being generated in the first deposition layer 135 a. In particular, in the case where the first deposition layer 135a is disposed on the fusion-spliced layer 133, the first deposition layer 135a is easily cracked due to the properties of the fusion-spliced layer 133. In the case where the first deposition layer 135a is cracked, gas and moisture may flow into the inside of the vacuum insulation panel 100 through the crack, thereby possibly lowering the insulation performance of the vacuum insulation panel 100. Therefore, the second barrier layer 180b is preferably stacked on the first barrier layer 180a such that the first deposition layer 135a and the second deposition layer 135b face each other.

The at least one barrier layer 180 may have a laminate structure in which the base material layer 134 and the deposition layer 135 on the base material layer 134 are arranged in a manner facing each other.

The at least one barrier layer 180 is not limited to the first barrier layer 180a, the second barrier layer 180b, and the third barrier layer 180 c.

The at least one barrier layer 180 may include a penetration resistant layer 136.

A penetration resistant layer 136 may be provided between the frit layer 133 and the substrate layer 134.

The penetration resistant layer 136 may include at least one of EVOH (Ethylene Vinyl Alcohol copolymer) and VM-EVOH (Vacuum metallized-Ethylene Vinyl Alcohol copolymer).

The at least one barrier layer 180 may also include a protective layer 137.

The protective layer 137 may be disposed at the outmost outline of the first skin material 130 toward the outside direction of the core material 110.

The protective layer 137 can absorb and disperse external impact and function to protect the surface or the core material 110 inside the vacuum insulation panel 100 from external impact. Therefore, the protective layer 137 is preferably formed of a material having excellent impact resistance.

The protective layer 137 may include: at least one of PET (Polyethylene terephthalate), OPP (Oriented Polypropylene), Nylon (Nylon) and Oriented Nylon (Oriented Nylon).

The blocking layer 170 faces the welding layer 133 of the first skin material 130, and may be attached to the welding layer 133. Specifically, the blocking layer 170 may be attached to the welding layer 133 corresponding to the second region 132 of the first skin material 130.

The base layer of the blocking layer 170 may be attached to the welding layer 133 of the first skin material 130 by welding or bonding.

The second skin material 140 may wrap the lower portion of the core material 110.

The second skin material 140 may include: a sealing layer 141, an inner layer 142, a prevention layer 143, and a cap layer 144.

The sealing layer 141 is attached to the surface of the core material 110 to wrap the core material 110 and the blocking layer 170 together with the fusion-bonded layer 133 of the first skin material 130. The Sealing layer 141 may include at least one of LLDPE (Linear Low-Density Polyethylene; Linear Low-Density Polyethylene), LDPE (Low-Density Polyethylene; Low Density Polyethylene), HDPE (High Density Polyethylene), and CPP (cast Polypropylene; Casting Polypropylene) having excellent sealability (Sealing).

The sealing layer 141 may be formed in a thin film form.

The inner layer 142 may be positioned on an upper side of the sealing layer 141. The inner layer 142 may include at least one of PET (Polyethylene terephthalate), VMPET (Vacuum metallized Polyethylene terephthalate), EVOH (Ethylene Vinyl Alcohol copolymer), and Nylon (Nylon).

The prevention layer 143 may be provided between the sealing layer 141 and the internal layer 142, and may include aluminum (Al).

The cover layer 144 can absorb and disperse external impact to protect the surface from external impact or the core material 110 in the vacuum insulation panel 100. Therefore, the cover layer 144 is preferably made of a material having excellent impact resistance.

The cap layer 144 may include: at least one of PET (Polyethylene terephthalate), OPP (Oriented Polypropylene), Nylon (Nylon) and Oriented Nylon (Oriented Nylon).

The fusion-bonded layer 133 corresponding to the first region 131 of the first skin material 130 may be combined with the sealing layer 141 corresponding to the edge position 145 of the second skin material 140 to form the extension part 150.

TABLE 1