KR20140102150A - Method for manufacturing insulation box improved insulation performance and insulation box for the same - Google Patents

Abstract

The present invention relates to a method for manufacturing an insulation box with a high-quality insulation performance by preventing thermal bridges. The method for manufacturing an insulation box which manufactures an insulation box having a side panel, a floor panel, and a door panel comprises a vacuum insulating material manufacturing step, for manufacturing a vacuum insulating material using synthetic silica and organic fiber; a panel manufacturing step, for manufacturing multiple side panels, a floor panel, and a door panel by attaching the vacuum insulating material to a base insulating material; a box box manufacturing step, for manufacturing an insulation box by assembling the side panels and the floor panel to form a space between vacuum insulating materials of each side panel which are adjacent to each other or between the vacuum insulating materials of the side panels and the vacuum insulating material of the floor panel; and a sealing step, for sealing the space in the insulation box with an auxiliary insulating material.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method of manufacturing a heat insulating box having improved heat insulating performance, and a heat insulating box manufactured by the method.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a heat insulating box having improved heat insulating performance and a heat insulating box manufactured thereby. More particularly, the present invention relates to a heat insulating box having improved heat insulating performance And a heat insulating box manufactured thereby.

Recently, it is spreading to worldwide awareness of the necessity and urgency of energy saving due to depletion of fossil fuels, and the desire for environmental protection is spreading to the global movement.

In accordance with the global trend of energy conservation and environmental protection, various researches are carried out for energy conservation and environmental protection by using insulation materials where energy such as buildings and heaters are used.

Considerable research has been carried out in the field of heat insulation box to minimize heat exchange with the outside so as to store articles within a specific temperature range, and in particular, BACKGROUND ART [0002] Techniques for improving the heat insulating performance by providing a heat insulating material inside a box or the like have become widespread.

Korean Patent Laid-Open Publication No. 2006-0128936 discloses an invention in which a refrigerated merchandise requiring refrigeration is stored inside a refrigerated container made of a vacuum insulation material. The cold storage container is formed by bending a vacuum insulation material composed of a peripheral wall portion on four sides which are bendably connected to each other and a lid portion bendably connected to each other along the previously formed folding line.

U.S. Patent No. 6,192,703 describes an invention in which a vacuum insulation panel is mounted on a closed structure.

The conventional thermal insulation technology applied to the above-mentioned thermal insulation and thermal insulation case has been pointed out as a problem in that the performance of the thermal insulation is poor or the processability of the thermal insulation is poor and the thermal insulation and the capacity of the thermal insulation case are inevitably increased.

In addition, although the vacuum insulation material has an excellent heat insulation performance of 8 times or more as compared with general insulation material, the outer surface of the vacuum insulation material is adopted as a metallic vacuum envelope, so that the connection contact portion of the vacuum insulation material is a simple shape such as a right angle shape or a slope shape Manufactured and supplied. Accordingly, it has been pointed out that, when vacuum insulation is applied to a building material, heat is transmitted through the contact surface, which is a connecting portion of the vacuum insulation, thereby significantly deteriorating the heat insulation performance.

On the other hand, Japanese Patent Publication No. 4944567 discloses a structure in which a hexahedron is formed on a flat surface in order to solve the problem of heat leakage from an edge portion due to a heat bridge phenomenon occurring at an end portion of a flat plate- Which is capable of assembling a hexagonal body by applying a gas barrier film having a thickness of 100 mm. However, there is a problem in that the productivity of the vacuum insulator is inferior due to the incompatibility of the manufacturing process.

Japanese Patent Publication No. 4778856 discloses a heat insulating container for transportation in which a vacuum insulating material is installed. In this case, a heat insulating container in which a vacuum insulating material is disposed between an inner case and a casing is provided with a bottom surface, The present invention provides a heat-insulating container provided with a vacuum insulator and a protection member which are folded and bent over at least one surface of a heat-insulating container, and a foamed polystyrene formed on the inner box is used as an inner box. However, such a heat insulating container has a problem that its own volume is large and heavy and the portability is poor.

1. Korean Patent Publication No. 2006-0128936 (December 24, 2006) 2. U.S. Patent Publication No. 6192703 (Feb. 27, 2001) 3. Japanese Patent Publication No. 4944567 (2008.05.08) 4. Japanese Patent Publication No. 4778856 (Feb. 14, 2008)

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method of manufacturing a heat insulating box with improved heat insulating performance that can improve the heat insulating effect of the heat insulating box while reducing the volume and weight of the heat insulating box, In which the heat insulating box is provided.

According to the present invention, there is provided a method for manufacturing a heat insulating box having a side panel, a floor panel and a door panel, comprising the steps of: preparing a vacuum insulating material using synthetic silica and organic fibers; A panel manufacturing step of manufacturing the side panels, the floor panel and the door panel by attaching the vacuum insulating material to the base insulating material; Assembling the side panels and the floor panels so as to form a space between the vacuum insulating materials of the side panels adjacent to each other or between the vacuum insulating material of the side panels and the vacuum insulating material of the bottom panel to manufacture a heat insulating box; And a sealing step of sealing the spacing space of the heat insulating box with a heat insulating auxiliary material.

Here, it is preferable to further include a foaming step of foaming the foamed material inside the heat insulating box.

Also, the foaming step may include an outer jig mounting step of fixing the heat insulating box to the inside of the outer jig; An inner jig mounting step of fixing the inner jig to the inside of the heat insulating box; And injecting a foaming material into the space between the outer jig and the inner jig.

And attaching a first heat insulating member attaching a first heat insulating member to the vacuum insulating member non-forming region of the side panel, the first heat insulating member being in contact with the vacuum insulating member of the side panel desirable.

Preferably, the first heat insulating member is made of polyurethane (PU) or polyethylene (PE), and is provided in the form of a sponge.

In addition, it is preferable that the spacing space is provided with a gap of 1 mm to 10 mm between the adjacent vacuum insulators.

It is also preferable that the box manufacturing step employs a urethane adhesive to assemble each of the side panels or the bottom panel and the side panel.

Preferably, the side panel further includes a plurality of through-holes formed in at least one of the side panels.

In addition, it is preferable to further include a second heat insulating member mounting step for inserting the second heat insulating member into the penetrating portion so as to maintain airtightness or heat insulation of the heat insulating box.

Preferably, the second heat insulating member is formed of a material such as polyurethane (PU) or polyethylene (PE), and is provided in the form of a sponge.

Further, in the airtight step, the heat insulating auxiliary material is preferably formed of foamed polyurethane.

Further, in the panel manufacturing step, the door panel is preferably manufactured by attaching a base insulating material on two opposite surfaces of a vacuum insulating material.

The above objects are also achieved according to the present invention by a heat insulating box manufactured through the method of manufacturing the heat insulating box according to any one of claims 1 to 12.

The above objects are also achieved by a floor panel according to the present invention. A side panel connected along an edge of the floor panel; And a door panel disposed to face the floor panel and interposed between the side panels, wherein each of the side panel, the floor panel, and the door panel comprises: (a) a base insulation; And (b) a vacuum insulator attached to the base insulator and having a smaller area than the base insulator, the vacuum insulator comprising synthetic silica and organic fibers, the vacuum insulator of each of the adjacent side panels, And a heat insulating auxiliary material is interposed in a spacing space formed in at least one of the space between the heat insulating material and the vacuum insulating material of the floor panel.

Here, the base insulating material of each of the adjacent side panels is preferably in contact with each other.

Preferably, the base insulator of the side panel and the base insulator of the bottom panel are in contact with each other.

According to the present invention, there is provided a method for manufacturing a heat insulating box having improved heat insulating performance, which is capable of minimizing heat loss due to radiation by attaching vacuum heat insulating material on six sides of the heat insulating box, and a heat insulating box manufactured thereby.

In addition, by attaching a plurality of vacuum heat insulating materials on the six inner surfaces of the heat insulating box, heat loss can be minimized even when a vacuum failure of the vacuum insulating material occurs.

Further, the foaming material may be foamed at a certain portion between the inside of the heat insulating box and the vacuum insulating material, thereby improving the adhesion between the heat insulating material and the airtightness.

In addition, it is possible to maximize the heat insulation effect by inserting the heat insulating member in the space between the door panel and the side panel. Therefore, it is possible to use a high-performance heat insulating box which can be used as a protection device for long- .

In addition, the capacity of the heat insulating box is smaller than that of the conventional heat insulating box, and the weight is lighter, thereby improving the portability.

1 is a flowchart schematically showing a method of manufacturing a heat insulating box according to an embodiment of the present invention,
FIG. 2 is a perspective view schematically showing a panel manufactured through a panel manufacturing step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 3 is a front view schematically showing a through-hole formed in a front panel manufactured through a through-hole forming step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 4 is a perspective view schematically showing a rear panel and a right side panel assembled through a box assembly step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 5 is a perspective view schematically showing a side panel assembly formed through a box assembly step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 6 is a plan view schematically illustrating a state where a space is formed in a side panel assembly through a box assembly step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 7 is a perspective view schematically showing a side panel and a floor panel assembled through a box assembly step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 8 is a perspective view schematically showing a side panel and a floor panel assembled through a box assembly step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 9 is a perspective view schematically showing a state in which the second heat insulating member is inserted into the penetrating part through the second heat insulating member attaching step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 10 is a perspective view schematically showing an airtight state between the spacing spaces through an airtight step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 11 is a plan view schematically showing a state in which the external jig is mounted on the outside of the heat insulating box through the step of mounting the external jig in the method of manufacturing the heat insulating box according to FIG. 1,
FIG. 12 is a perspective view schematically showing a state in which a built-in jig is mounted on the inside of a heat insulating box through a step of mounting a built-in jig in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 13 is a plan view schematically showing a state in which a foamed material is injected into a heat insulating box through an injection step in the method of manufacturing a heat insulating box according to FIG. 1,
FIG. 14 is an exploded perspective view schematically showing a door panel in which a cutout portion is formed in the method for manufacturing a heat insulating box according to FIG. 1,
FIG. 15 is a front sectional view schematically showing a state in which a first heat insulating member is mounted between a side panel and a door panel through a first heat insulating member mounting step in the method of manufacturing a heat insulating box according to FIG. 1,
16 and 17 are photographs of the heat insulating box manufactured through the method of manufacturing the heat insulating box according to FIG.

Hereinafter, a method for manufacturing a heat insulating box according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart schematically showing a method of manufacturing a heat insulating box according to an embodiment of the present invention.

Referring to FIG. 1, a method (S100) for manufacturing a heat insulating box according to an embodiment of the present invention can prevent deterioration of the heat insulating performance of a heat insulating box due to a thermal bridge phenomenon inside a heat insulating box. A panel manufacturing step S120, a box manufacturing step S130, a confidential step S140, a foaming step S150, and a first heat insulating member attaching step S160.

In addition, an embodiment of the present invention can maximize the internal space of the heat insulating box by attaching a thin heat insulating material to the heat insulating box, and minimize the heat loss in the space where the adjacent heat insulating materials face each other, A usable insulation box can be provided.

Before describing the method S100 for manufacturing a heat insulating box according to an embodiment of the present invention, a thermal bridge, which is one of the problems to be solved by the present invention, will be described.

A "thermal bridge" is substantially the same as a cold bridging phenomenon, meaning that a portion of a structural wall is thinner than the other portions of a structural wall, or the materials constituting adjacent walls are different, When a smaller portion occurs, it means that the condensation is likely to occur.

Here, in the case of the vacuum insulation material, the airtight foil made of a synthetic resin layer of metal laminating is used for packaging for a long time to maintain the heat insulation performance. When the surfaces of the vacuum insulation material come into contact with each other, laminating films may come in contact with each other, resulting in a portion having a lower thermal resistance resistance due to the structure, which may cause thermal bridging.

Accordingly, in an embodiment of the present invention, when assembling a panel manufactured using the vacuum insulation material 10, the adjacent vacuum insulation materials 10 are assembled so that they do not contact each other, and a separation distance 115 And the heat insulating property of the heat insulating box 1 can be maintained and improved by filling the spacing space 115 with the heat insulating auxiliary material 116 (see also Fig.

 The vacuum insulation material preparation step S110 is a step of preparing a vacuum insulation material 10 prepared by mixing synthetic silica and organic fibers.

Here, it is preferable that the vacuum insulation panel 10 is formed to have a small thickness so as to enlarge the internal space of the heat insulation box 1 and to have excellent heat insulation performance.

On the other hand, the characteristic technical idea of the vacuum insulating material 10 is that the powder mixture containing synthetic silica having an average particle size of 5 to 50 nm and the organic fibers cut to 6 to 40 mm are 0.5 To 10 parts by weight of a fiber mixture, and then using an inner core made by wrapping 6 sides with a heat shrinkable film.

The characteristic of the vacuum insulation material 10 prepared in the above-described vacuum insulation material preparation step S110 is that organic fibers are used. The reinforcing fibers for vacuum insulation used up to now include inorganic fibers such as glass fiber and ceramic fiber. Although the two inorganic fibers are mixed with each other as they are made of silica and similar to the main material of the internal core material, the reinforcing effect of the mechanical strength is not great when the two fibers are mixed, and the specific gravity is as high as the glass fiber of 2.5 and the ceramic fiber of 3.0, There is a high disadvantage.

Therefore, the vacuum insulator 10 of this embodiment introduces organic fibers as reinforcing fibers to improve the disadvantages of the vacuum insulator using inorganic fibers as reinforcing fibers. Glass fiber and ceramic fiber are used as inorganic fiber for reinforcement fiber which is used as an inner core of conventional vacuum insulation material. Inorganic fiber is mixed with synthetic silica because silica and alumina powder such as synthetic silica are mainly composed. It is known that the reinforcing effect is high by exhibiting the bonding force. On the other hand, organic fibers are considered to be easily separated because they have no bonding force at the time of compression, and the reinforcing effect is considered to be low. In addition, it is known that organic fibers generate gas in vacuum and increase the internal pressure of vacuum insulation. However, the inventors of the present invention have focused on organic fibers having a low specific gravity in order to improve the specific gravity of the inorganic fibers. In order to prevent the organic fibers and the synthetic silica from easily separating, To maximize the friction between organic fibers and synthetic silica.

As a result, it was found that the frictional force with the synthetic silica at the bent portion of the warped organic fibers efficiently acts to improve the mechanical strength of the inner core material, which is superior to the weak bonding effect of the inorganic fibers. Organic fiber has almost no binding effect with synthetic silica in the inner core of vacuum insulation. However, the frictional force between the fibers and the synthetic silica generated at the flexion of the fiber exerts a stronger reinforcing effect than the conventional fibers.

On the other hand, it is preferable to cut the organic fibers to have a length of 6 to 40 mm, and it is more preferable to use a certain length of organic fibers rather than using organic fibers having various lengths. If the length of the organic fiber is shorter than 6 mm, the fiber reinforcing effect is significantly lowered. If the length of the organic fiber is longer than 40 mm, partial clumping occurs and it is difficult to homogeneously mix with the powder.

The diameter of the organic fibers is preferably from 1 to 100 mu m, more preferably from 10 to 40 mu m. Since the organic fibers are produced in a bundle, if it is smaller than 1 탆, it takes much time to disperse. If it is larger than 100 탆, the fibers do not bend well and the number of fibers is small.

Here, organic fibers having a true specific gravity of 1.4 or less such as PE, PP, Nylon, PVA, PAN, and PET can be used as the kind of the organic fiber used. For the fiber reinforcement of the inner core, it is preferable to use only the organic fibers, but it is also possible to mix the carbon fibers and glass fibers with the organic fibers at a high ratio. In this case also, the main reinforcing function is the organic fiber.

In the meantime, the vacuum insulator 10 in the embodiment of the present invention is formed of a combination of powder containing synthetic silica and organic fibers. Here, the average primary particle size of the synthetic silica is preferably 5 to 50 nm. When the primary particle size is less than 5 nm, the volume becomes large and difficult to handle. When the primary particle size is larger than 50 nm, a sufficient heat insulating effect can not be obtained in compression. The BET specific surface area of the synthetic silica is preferably 40 to 400 m < 2 > / g. When the specific surface area is less than 40 m < 2 > / g, the heat insulating property is deteriorated. When the specific surface area exceeds 400 m < 2 > / g,

Here, synthetic silica can be used as fumed silica produced by a gas phase reaction, precipitated silica produced by a liquid phase reaction, colloidal silica, aerogels, silica sol, and the like. Among them, the use of a fumed silica having a low production cost and a large specific surface area is preferable. The inner core of vacuum insulation can be manufactured by pure synthetic silica powder. In addition to synthetic silica, powders such as alumina, titanium oxide, silicon carbide and graphite can be mixed to improve the heat insulation. Preferably, the synthetic silica content of the powder mixture for internal core material accounts for 70% or more.

In addition, it is preferable that the vacuum insulation material 10 according to the embodiment of the present invention mixes infrared opaque fire to block radiation heat with synthetic silica. The infrared opaque fire used for the inner core is titanium oxide, carbon black, talc, silicon carbide, iron oxide, zirconium oxide, and graphite. These opaque fires have the function of blocking fast heat transfer by radiation by reflecting or absorbing far infrared rays emitted from objects at 15 ~ 40 ℃. It is preferred that the opaque fire occupies 5 to 30 parts by weight per 100 parts by weight of the inner core material. The average particle size of the components forming the opaque fire is 1 to 90 μm or less, and the smaller the particle size, the better the effect.

Furthermore, the content of the organic fiber mixture is preferably 0.5 to 10 parts by weight based on 100 parts by weight of the synthetic silica-containing powder mixture. If the organic fiber content becomes too high, the change of the vacuum insulator 130 with time is accelerated to deteriorate the heat insulating performance.

On the other hand, it is preferable to homogeneously blend the powder mixture and the fiber mixture in a mixer at a predetermined blending ratio, in order to blend the powder mixture containing synthetic silica and the fiber mixture including the organic fiber. Alternatively, it is possible to make a composite mixture of synthetic silica-containing powder mixture and organic fiber-containing fiber mixture in layers, but the mechanical strength improvement effect of the same organic fiber usage may not be better than that of the homogeneous mixture.

The manufacturing process of making the inner core of vacuum insulation with a mixture of synthetic silica-containing powder mixture and fiber containing organic fiber takes place in several stages. Here, various manufacturing processes are possible according to the arrangement order of each step. The result, however, has similar properties.

Here, the easiest process for manufacturing the vacuum insulation material 10 is to separately dry the synthetic silica-containing powder mixture and the organic fiber-containing fiber mixture; Blending the dried powder mixture and the fiber mixture at a predetermined ratio; And compressing the combination.

Drying of the powder mixture containing synthetic silica is preferably carried out at a temperature of from 100 to 150 ° C under normal pressure for the purpose of evaporating water. Drying of the fiber mixture containing organic fibers differs depending on the heat-resistant temperature of the fibers. Nylon fiber has a heat-resisting temperature exceeding 1120 ° C, and it is preferable to dry at 100-140 ° C, but it is preferable to dry PP fiber having a low heat-resistant temperature at a lower pressure of 70-80 ° C. The organic fiber is preferably dried at a temperature 10 to 20 ° C lower than the softening temperature of the fiber. Mixing of synthetic fiber-containing powder mixture with organic fiber-containing fiber mixture can be carried out using a powder mixer such as a ribbon mixer, a stirrer, a Nauta mixer, and a blade mixer. Evenly mixed blends are compressed into presses, where the density of the inner core is controlled. The density of the inner core material is preferably compressed at a density of 0.12 to 0.35 g / cm3 as an important factor that greatly affects the mechanical strength and the thermal insulation of the finished product. The press can be made with both single acting press and roller press.

The vacuum insulator 10 of the present invention can use a heat shrinkable film or a film having moisture resistance to laminate the powder mixture and the fiber mixture as core materials as raw materials and then lapping the mixture on six sides. The heat shrinkable film is selected from PE, LLDPE, PP, PVC, PET and the like. The stretched moisture permeable film has a moisture permeability of 30 g / m 2 or less per 24 hours or a moisture permeability coefficient of 0.28 g / m 2 · h · mm Hg .

The compression molded vacuum insulation material 10 is wrapped in a heat shrinkable film selected from PE, LLDPE, PP, PVC, PET and the like and vacuum-packed in a final finish material such as nylon, PET, PP, .

The heat-shrinkable film selected from among PE, LLDPE, PP, PVC and PET is used for the six-sided wrapping packaging used in the present invention. In the heat insulation material requiring moisture resistance, the moisture permeability of the film is 30 g / A film having a moisture permeability of 0.28 g / m 2 · h · mm Hg or less is used. Wrapping packaging is performed once or twice. PE film package is wrapped with PE film and sealed with heat adhesive. In LLDPE and other shrink film packaging, the silica insulation is wrapped with a shrink film such as LLDPE and shrink wrapped using shrink wrapping machine.

PE, LLDPE, PP, PVC, and PET, and it is possible to improve physical properties such as bending strength, hygroscopicity and light weight. In addition, when a film having moisture resistance is used, it is required to satisfy the criteria of the energy saving design of the building and to omit the process of installing the moistureproof film on the inner wall of the building. Lt; / RTI >

Other processes for the manufacture of internal core materials include blending a synthetic silica-containing powder mixture with an organic fiber-containing fiber mixture; Drying the moisture of the formulation; The step of compacting the dried formulation is possible.

Another inner core manufacturing process includes blending a synthetic silica-containing powder mixture with an organic fiber-containing fiber mixture; Compressing the combination; The step of drying the compressed compound is possible.

The vacuum insulation material 10 of the present invention is finally subjected to a final packaging process as an aluminum packaging material. The final packing of the vacuum insulation material 10 according to an embodiment of the present invention is carried out by wrapping two edges of the four sides of the vacuum insulation material 10 with n sheets of aluminum wrapping material 10 and finally wrapping them with the aluminum wrapping material The other two corners can maintain the most stable vacuum packaging state in which the vacuum is not released even if the vacuum insulation material 10 is formed by bending by wrapping the aluminum packaging material, for example, in three stages.

FIG. 2 is a perspective view schematically showing a panel manufactured through a panel manufacturing step in the method of manufacturing a heat insulating box according to FIG. 1. FIG.

2, the panel manufacturing step S120 includes attaching the vacuum insulator 10 to the base insulating material 20 to manufacture the side panel 110, the floor panel 120, and the door panel 130 .

In an embodiment of the present invention, the insulating box 1 is provided in the form of a square so that the side panel 110 includes a front panel 111, a rear panel 112, a left side panel 113 and a right side panel 114 .

On the other hand, each of the panels is manufactured by attaching a vacuum insulating material 10 to one side of the base insulating material 20. Here, the vacuum insulation panel 10 may be attached to the base insulation panel 20 in a single layer, but two or more layers may be attached to the vacuum insulation panel 10 to reduce the adiabatic performance of the vacuum insulation panel 10 due to vacuum defects during the manufacturing process. .

The vacuum insulator 10 is smaller in size than the base insulator 20 during the manufacture of each panel so that the vacuum insulator 10 and the base insulator 20 are adhered to each other at the corner of the base insulator 20. [ So that a remaining space in which the substrate 10 is not attached can be formed.

The base insulating material 20 and the vacuum insulating material 10 may be attached in such a manner that the center of the base insulating material 20 and the center of the vacuum insulating material 10 coincide with each other so that the remaining space is formed, The remaining space can be ensured by displaying the area to which the vacuum insulator 10 is to be attached in advance.

Here, the remaining space may be used as a space for assembling each panel during the box manufacturing step (S130), and the size of the remaining space may be preliminarily set so that the vacuum heat insulating materials 10 attached to the adjacent panels do not contact each other Can be set.

On the other hand, when two or more layers of the vacuum heat insulating material 10 are attached on the base insulating material 20, the respective vacuum insulating materials 10 can be attached through the double-faced tape. In this case, the double-sided tape can be attached with a distance of 1 to 2 mm from each edge of the vacuum insulator 10.

Here, additional pressure can be applied to the vacuum heat insulators 10 attached to each other through the double-sided tape, and the spacing distance between the vacuum insulators 10 attached to each other is preferably 0.5 mm.

 Meanwhile, the penetration forming step S121 may be additionally performed after the panel manufacturing step S120 according to an embodiment of the present invention.

FIG. 3 is a front view schematically showing a through-hole formed in a front panel manufactured through a through-hole forming step in the method of manufacturing a heat insulating box according to FIG.

Referring to FIG. 3, the penetration forming step S121 is a step of forming a penetration portion in at least one of the side panels 110. For convenience of description, a penetration portion 111a is formed on the front panel 111 .

The through-hole 111a is formed by cutting the base insulating material constituting a part of the front panel 111, preferably the front panel 111, so as to maintain the heat insulating performance effectively while connecting the inside and the outside of the insulating box 1 do. Particularly, components such as cables can be connected to the outside, and insulation performance can be maintained, so that electric equipment can be easily used even in an area where the temperature difference between inside and outside is large, such as polar regions.

Here, the penetration portion 111a may be formed in a semicircular shape, but is not limited thereto, and may be formed in various shapes according to objects to be penetrated.

On the other hand, the door panel 130 can be manufactured by attaching the base insulating material 20 on opposite sides of the vacuum insulating material 10. [ The base insulating material 20 attached to the upper surface of the vacuum insulating material 10 is disposed on the outer side of the heat insulating box 1 and the base insulating material 20 adhered on the lower surface of the vacuum insulating material 10 is disposed on the upper surface of the heat insulating box 1, As shown in Fig.

FIG. 14 is an exploded perspective view schematically showing a door panel in which a cutout portion is formed in the method of manufacturing a heat insulating box according to FIG. 1;

Referring to FIG. 14, the base insulating material of the door panel 130 may form a cut-out 131 formed by cutting a part of a region facing the through-hole 111a. Therefore, a part of the second heat insulating member 111b can come into contact with the side of the cutout 131 in the base heat insulating material of the door panel 130. As a result, the second heat insulating member 111b can penetrate through the penetrating part 111a and the cutout part 131, respectively.

FIG. 4 is a perspective view schematically showing a rear panel and a right side panel assembled through a box assembly step in the method of manufacturing a heat insulating box according to FIG. 1, FIG. 5 is a perspective view And FIG. 6 is a schematic view showing a state where a space is formed in a side panel assembly through a box assembly step in the method of manufacturing a heat-insulating box according to FIG. 1. FIG. 6 is a perspective view schematically showing a state where a side panel assembly is formed through steps And FIG. 7 is a perspective view schematically showing a side panel and a floor panel assembled through a box assembly step in the method of manufacturing a heat insulating box according to FIG. 1. FIG. 8 is a perspective view illustrating a method of manufacturing a heat insulating box Is a perspective view schematically showing a side panel and a floor panel assembled through a box assembling step.

4 to 8, the box manufacturing step S130 includes the steps of assembling the side panels 110 and the floor panels 120 to fabricate the heat insulating box 1, wherein each side panel 110 Or between the vacuum insulation of the side panel 110 and the vacuum insulation of the bottom panel 120 to produce the insulation box 1.

4 and 5, in an embodiment of the present invention, the side panel 110 is assembled with the heat insulating box 1 first, 7 and FIG. 8, the bottom panel 120 is fabricated by assembling the bottom panel 120 below the assembled side panel 110. FIG.

First, the front panel 111, the rear panel 112, the left side panel 113, and the right side panel 114 are assembled to assemble the side panel 110 in a rectangular shape with the upper and lower sides opened as a whole.

6, the vacuum insulation material in the front panel 111 is adjacent to the vacuum insulation material in the left side panel 113 and the vacuum insulation material in the right side panel 114, and the vacuum insulation material in the rear panel 112 The vacuum insulation material of the front panel 111 is disposed between the vacuum insulation material of the left side panel 113 and the vacuum insulation material of the right side panel 114 and between the vacuum insulation material of the left side panel 113 and the vacuum insulation material of the right side panel 114, And a space (115) is formed between the vacuum insulator and the vacuum insulator. Similarly, the vacuum insulation material in the rear panel 112 forms a space (not shown) between the vacuum insulation material of the left side panel 113 and the vacuum insulation material of the right side panel 114.

That is, a total of four spacing spaces are formed through the assembly of the side panel 110.

Here, it is preferable that the distance between the adjacent vacuum spaces is in the range of 1 to 10 mm.

On the other hand, an adhesive may be used to assemble each of the side panels 110, and a urethane adhesive, more preferably a cure adhesive for a cryogenic temperature, may be used as the adhesive.

The bottom panel 120 is assembled to the lower side of the side panel 110 assembly after assembling the side panels 110 as described above. Here, the side panel 110 and the floor panel 120 may be assembled by applying adhesive to the remaining space of the floor panel 120.

The remaining space of the bottom panel 120 may be provided in correspondence with the lower end of the side panel 110 assembly so that the side surfaces of the vacuum insulation of the bottom panel 120 are in surface contact with the remaining space of the side panels 110 Through which the outer surface of the side panel 110 assembly and the side surface of the bottom panel 120 can be coplanar.

Meanwhile, a space is also formed between the vacuum insulation materials of the side panel 110 and the bottom panel 120, and the spaces between the vacuum insulation materials adjacent to each other are spaced apart by a distance of 1 to 10 mm .

On the other hand, an adhesive may be used to assemble the side panel 110 and the floor panel 120, and a urethane adhesive, more preferably a curing adhesive for a cryogenic temperature, may be used as the adhesive.

Meanwhile, in an embodiment of the present invention, a second insulating member mounting step (S131) may be additionally performed to seal the penetrating portion 111a formed in the panel manufacturing step S120 described above.

FIG. 9 is a perspective view schematically showing a state in which the second heat insulating member is inserted into the penetrating portion through the second heat insulating member attaching step in the method of manufacturing a heat insulating box according to FIG. 1. FIG.

9, the second heat insulating member mounting step S131 includes a second heat insulating member 111b corresponding to the shape of the penetrating portion 111a for air tightness and thermal insulation treatment of the penetrating portion 111a, 111a.

For example, when a cable or a harness flow is introduced into the heat insulating box 1 through the penetrating portion 111a, the second heat insulating member 111b is interposed in the penetrating portion 111a to form the penetrating portion 111a, Thereby preventing the inside and the outside of the heat insulating box 1 from being connected to each other.

Here, the second heat insulating member 111b may be provided in a donut shape. In addition, the second heat insulating member 111b is made larger than the diameter of the penetrating portion 111a by about 150%, and is fitted to the penetrating portion 111a by interference fit, thereby minimizing the gap caused by the penetrating portion 111a.

In addition, the second heat insulating member 111b can pass through the through portion 111a easily by the object to be passed through the penetrating portion 111a, has an appropriate elastic force to maintain the heat insulating performance, Is preferably made of a material having a small thickness. For example, the material of the second heat insulating member 111b may be selected from polyurethane (PU) or polyethylene (PE), and preferably polyurethane (PU). In addition, the second heat insulating member 111b may be provided in the form of a sponge.

FIG. 10 is a perspective view schematically showing an airtight space between the spacing spaces through an airtight step in the method of manufacturing the heat insulating box according to FIG.

10, the airtightness step S140 is performed to separate the space between the vacuum insulation materials of the respective side panels 110 and the space between the vacuum insulation material of the side panel 110 and the vacuum insulation material of the floor panel 120 And is sealed with the heat insulating auxiliary material 116.

Here, when airtightness between the spacing spaces is sealed by the heat insulating auxiliary material 116, the respective heat insulating materials can contact each other to exhibit a heat insulating effect of 50% or more as compared with the case where the heat insulating effect is reduced by heat bridging. In one embodiment of the present invention, foamed polyurethane can be used as the adiabatic auxiliary material 116.

FIG. 11 is a plan view schematically showing a state in which the external jig is mounted on the outside of the heat-insulating box through the step of mounting the external jig in the method of manufacturing the heat-insulating box according to FIG. 1, and FIG. 12 is a cross- FIG. 13 is a perspective view schematically showing a state in which a built-in jig is mounted on the inside of a heat insulation box through a step of installing a built-in jig. FIG. 13 is a cross- FIG. 5 is a plan view schematically showing the injected state.

11 to 13, the foaming step S150 is a step of foaming the foamed material 250 inside the heat insulating box 1 using the jig 210 for air tightness inside the heat insulating box 1 An external jig mounting step S151, an internal jig mounting step S152, and an injection step S153.

The external jig mounting step S151 is a step of fixing the heat insulating box 1 to the inside of the external jig 220. [

The inner jig mounting step S152 is to fix the inner jig 230 inside the heat insulating box 1. When the inner jig 230 is in contact with the inside of the heat insulating box 1, the inside of the heat insulating box 1 may be damaged by friction. To prevent this, the inner jig 230 is packed .

That is, the external jig 220 and the internal jig 230 are mounted on the inside and the outside of the heat insulating box 1, respectively, so that the position of the heat insulating box 1 can be effectively fixed.

The injecting step S153 is a step of injecting a foaming material 250 into the space between the outer jig 220 and the inner jig 230 or more precisely between the base insulating material of the side panel 110 and the inner jig 230 Injection. In an embodiment of the present invention, an injection step (S153) is performed through a foam material inlet (240), and the foam material to be injected is eventually foamed to improve the airtightness of the heat insulating box (1).

In addition, after the injection step S153, the outer jig 220 or the inner jig 230 can be further removed from the heat insulating box 1. [

FIG. 15 is a front sectional view schematically showing a state in which a first heat insulating member is mounted between a side panel and a door panel through a first heat insulating member mounting step in the method for manufacturing a heat insulating box according to FIG. 1;

15, in an embodiment of the present invention, a first insulating member attaching step of attaching a first insulating member 132 to a space between a vacuum insulating member of the door panel 130 and a base insulating member of the side panel 110 (S160).

When the door panel 130 is finally mounted on the heat insulating box 1, a space is formed between the base insulating material of the side panel 110 and the vacuum insulating material of the door panel 130, A space may be formed between the formed region and the vacuum insulating material of the door panel 130, so that the airtightness and heat insulating performance of the heat insulating box 1 may be deteriorated.

In order to prevent this, the first heat insulating member 132 may be additionally installed in the space between the base insulating member of the side panel 110 and the vacuum insulating member of the door panel 130. Here, the first heat insulating member 132 is provided in the form of a sponge, and may be selected from polyurethane (PU) or polyethylene (PE).

16 and 17 are photographs of the heat insulating box manufactured through the method of manufacturing the heat insulating box according to FIG.

Hereinafter, a method of manufacturing a heat insulating box (S100), which is manufactured through an example of applying the method (S100) for manufacturing a heat insulating box according to an embodiment of the present invention and shown in FIG. 16 and FIG.

In the vacuum insulation material preparation step S110, the vacuum insulation material of 200 mm x 200 mm x 15 mm to be used for the floor panel 120 and the door panel 130 and the vacuum insulation material of 159 mm x 159 mm x 18 mm to be used for the side panel 110 are the same ≪ / RTI >

The PP fiber prepared with a diameter of 40 탆 and a length of 19 mm was vacuum-dried under a temperature condition of 70 캜 for about 2 hours, 97% by weight of a 97 wt% fumed silica powder mixture, Is adjusted to have a 3wt% magnification and then mixed in a blade mixer for about 10 minutes. After the mixing process, the evenly mixed mixture is placed in four flasks and compressed with a single-acting press to produce a core material having a specific gravity of 0.16. The core material is wrapped on six sides, packed in an aluminum package, injected into a vacuum chamber, and vacuum evacuated and sealed under a pressure of 40 bar or less.

In the panel manufacturing step S120, a vacuum insulator having a size of 200 mm × 200 mm × 15 mm is used for the floor panel 120 and the door panel 130, respectively, and a vacuum insulator having a size of 59 mm × 159 mm × 18 mm is used for each side panel 110 ) To manufacture a panel.

In the box manufacturing step S130, the spacing distances between the vacuum insulation panels of the side panels 110 and the vacuum insulation panels of the side panels 110 and the bottom panels 120 are all 5 mm So that the side panel 110 and the floor panel 120 are assembled.

In the sealing step (S140), the polyurethane is injected and fired between the spaced spaces so that the adjacent vacuum insulators are not in contact with each other to form an airtight hermetic seal.

In the step of attaching the first adiabatic member (S160), 23 mm X 159 mm X 18 mm of polystyrol is attached between the vacuum heat insulator of the door panel 130 and the base insulator of the side panel 110 to form an airtight hermetic seal.

The heat insulating box 1 manufactured by the method S100 of manufacturing a heat insulating box according to an embodiment of the present invention includes a bottom panel 120 and a plurality of side panels 110 And a door panel 130 disposed between the floor panels 120 and facing the floor panels 120 so as to interpose the side panels 110 therebetween.

Each of the side panels 110, the floor panel 120 and the door panel 130 is attached to the base insulating material 20 and the base insulating material 20 and has a smaller area than the base insulating material 20, And a vacuum insulator 10 including glass fiber.

The heat insulating auxiliary material 116 is interposed between the vacuum insulating materials of the side panels 110 adjacent to each other and between the vacuum insulating material of the side panels 110 and the vacuum insulating material of the bottom panel 130 .

Here, the base insulating material of each of the adjacent side panels 110 may be provided to be in contact with each other.

Also, the base insulating material of the side panel 110 and the base insulating material of the bottom panel 130 may be provided to be in contact with each other.

The heat insulating box manufactured by the above method and the heat insulating box designed to contact the vacuum insulating material without the base insulating material between the vacuum insulating material and the vacuum insulating material are tested under the same conditions to measure the temperature change inside the heat insulating box Respectively.

Time (h) 0 12 24 36 48 60 72 (° C) of the heat insulating box according to an embodiment of the present invention,
15
15
14

15
11
10
5 (° C) of the heat insulating box according to the comparative example of the present invention,
15
8

2

-10
-15
-20
-20

The above table is a table showing the result of measuring the internal temperature of a heat insulating box manufactured according to an embodiment of the present invention and a heat insulating box of a comparative example in a large refrigerator of minus 25 ° C. As a result, it can be seen that the internal temperature of the heat insulating box of the comparative example suddenly decreases after 24 hours, whereas the internal temperature of the heat insulating box of the present invention hardly changes.

That is, the heat insulating box 1 manufactured by the above-described method can maximize the internal space used by applying the vacuum heat insulating material 10 having a thin and excellent heat insulating performance, and has a better heat insulating performance than the conventional heat insulating box It is possible to provide a box having a small volume and a light weight.

The scope of the present invention is not limited to the above-described embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

1: Insulation box 10: Vacuum insulation
20: base insulating material 110: side panel
120: floor panel 130: door panel
210: Jig 220: External jig
230: inner jig 240: foaming material inlet
S100: Method for manufacturing a heat insulating box according to an embodiment of the present invention
S110: vacuum insulator preparing step S120: panel manufacturing step
S130: box manufacturing step S140: confidential step
S150: Foaming step S160: Step of attaching the first thermal insulating member

Claims (16)

A method of manufacturing a heat insulating box comprising a side panel, a floor panel and a door panel,
A step of producing a vacuum insulation material using synthetic silica and organic fibers;
A panel manufacturing step of manufacturing the side panels, the floor panel and the door panel by attaching the vacuum insulating material to the base insulating material;
Assembling the side panels and the floor panels so as to form a space between the vacuum insulating materials of the side panels adjacent to each other or between the vacuum insulating material of the side panels and the vacuum insulating material of the bottom panel to manufacture a heat insulating box;
And a sealing step of sealing the spacing space of the heat insulating box with a heat insulating auxiliary material. The method according to claim 1,
And a foaming step of foaming the foaming material inside the heat insulating box. 3. The method of claim 2,
Wherein the foaming step includes an outer jig mounting step of fixing the heat insulating box to the inside of the outer jig; An inner jig mounting step of fixing the inner jig to the inside of the heat insulating box; And injecting a foamed material between the outer jig and the inner jig. The method according to claim 1,
And attaching a first heat insulating member to the vacuum thermal insulating member in a region where the vacuum thermal insulating member is not formed among the base heat insulating members of the side panel to contact the vacuum insulating member of the side panel. 5. The method of claim 4,
Wherein the first heat insulating member is formed of a material of polyurethane (PU) or polyethylene (PE), and is provided in the form of a sponge. The method according to claim 1,
Wherein the spacing spaces are spaced apart from each other by a distance of 1 mm to 10 mm. The method according to claim 1,
Wherein the box manufacturing step assembles the respective side panels or the bottom panel and the side panel using a urethane adhesive. The method according to claim 1,
A plurality of side panels are provided,
And forming a through portion in at least one of the side panels. 9. The method of claim 8,
And a second heat insulating member mounting step of inserting a second heat insulating member into the penetrating section so as to maintain airtightness or heat insulation of the heat insulating box. 10. The method of claim 9,
Wherein the second heat insulating member is formed of a material of polyurethane (PU) or polyethylene (PE) and is provided in the form of a sponge. The method according to claim 1,
Wherein the heat insulating auxiliary material is formed of foamed polyurethane in the airtight step. The method according to claim 1,
Wherein the door panel is manufactured by attaching a base insulating material to two opposite surfaces of the vacuum insulating material in the panel manufacturing step. An insulation box produced by the method of manufacturing an insulation box according to any one of claims 1 to 12. Floor panels;
A side panel connected along an edge of the floor panel; And
And a door panel disposed to face the bottom panel and interposed between the side panels,
Wherein each of the side panels, the floor panels,
(a) base insulation; And
(b) a vacuum insulator attached to said base insulator, said insulator having a smaller area than said base insulator and comprising synthetic silica and organic fibers,
Wherein a heat insulating auxiliary material is interposed in a spaced space formed between at least one of the vacuum insulating materials of the side panels adjacent to each other and between the vacuum insulating material of the side panel and the vacuum insulating material of the bottom panel. 15. The method of claim 14,
And the base insulating material of each of the adjacent side panels is in contact with each other. 15. The method of claim 14,
Wherein the base insulator of the side panel and the base insulator of the bottom panel are in contact with each other.

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