WO2026019091A1 - Vacuum insulation structure for reflecting and absorbing radiant heat - Google Patents

Abstract

The present invention aims to provide a vacuum insulation structure for reflecting and absorbing radiant heat. That is, the present invention comprises: a vacuum insulation material (10) which is formed in the shape of a polygonal plate, and in which a hollow portion (12) for a vacuum space is formed in an outer skin (11) provided on the outside thereof, the vacuum insulation material (10) being provided to have a vacuum state therein; a reinforcing core material (60) which is installed at a predetermined interval in the hollow portion (12) inside the vacuum insulation material (10); a radiant heat reflection layer (20) which is installed on an inner surface of one side outer skin (11) of the vacuum insulation material (10) and is provided to reflect radiant heat; and a radiant heat absorption layer (30) which is formed on an inner surface of the other side outer skin (11) of the vacuum insulation material (10) so as to face the radiant heat reflection layer (20) and is provided to absorb radiant heat. Use of the vacuum insulation structure for reflecting and absorbing radiant heat provides an advantage of effectively blocking a heat flow phenomenon caused by radiant heat, which is a drawback of the vacuum insulation material, thereby maximizing insulation performance.

Description

Vacuum insulation structure that reflects and absorbs radiant heat

The present invention relates to a vacuum insulation structure that reflects and absorbs radiant heat, thereby significantly improving not only thermal insulation but also soundproofing properties by reflecting and absorbing radiant heat within the vacuum insulation.

In general, to improve the insulation performance of refrigerators and warmers, insulating materials such as Styrofoam, urethane foam, glass wool, rock wool, and polyester foam are mainly used, and these insulating materials are mainly used in resistance-type insulation methods that minimize heat transfer through conduction and convection.

However, heat loss in refrigerators and warm rooms is largely due to radiation as well as conduction and convection, and although materials such as aluminum foil that can reflect heat transferred by radiation are applied to the aforementioned insulating materials to prevent heat transfer by radiation, there are limitations in improving insulation performance.

Accordingly, in Korean Patent Publication No. 10-2018-0001315, a technology has been previously disclosed, including: a vacuum panel formed by compressing a core material and a sealing film in a high vacuum state so as to block internal temperature or external air or moisture from entering the interior; urethane foam installed on the outside to surround the vacuum panel so as to block internal temperature from being transferred to the outside or external temperature from being transferred to the interior; aluminum foil installed on one side of the urethane foam so as to prevent internal temperature from being transferred to the outside and causing internal heat loss; and a PVC panel installed on the other side of the urethane foam on which the aluminum foil is installed.

In addition, in another prior art, Korean Patent No. 10-1296475, a technology has been previously proposed that includes a panel forming the exterior of a front door; a vacuum insulation material accommodated along the inner length direction of the panel; and a gap-filling means for filling a gap between the vacuum insulation material and the panel; wherein the vacuum insulation material includes a core material and an outer covering material surrounding the core material, and the outer covering material uses a structure in which multiple layers of polymer films on which inorganic materials are deposited are bonded, or a structure in which aluminum foil and a polymer film are bonded.

However, the above-mentioned conventional technologies attempted to improve the insulation performance of vacuum insulation materials by blocking radiant heat using aluminum foil, but there was a problem that the radiant heat was not completely blocked by the aluminum foil and some of it moved, thereby lowering the insulation performance.

Accordingly, the present invention was conceived to solve the above-mentioned problem, and the purpose of the present invention is to provide a vacuum insulation structure that reflects and absorbs radiant heat, which can maximize insulation performance by effectively blocking the heat flow phenomenon caused by radiant heat, which is a disadvantage of vacuum insulation, by arranging a radiant heat reflecting layer and a radiant heat absorbing layer inside the vacuum insulation material so as to face each other and improving the structure to reflect and absorb radiant heat introduced into the vacuum insulation material.

In addition, the soundproofing (sound insulation) is improved by the vacuum layer, and materials such as foam or fiberglass used in existing vacuum insulation materials are difficult to recycle, and cause environmental pollution due to waste and serious air pollution in the event of a fire. Therefore, the present invention aims to provide an eco-friendly vacuum insulation structure by not using these materials.

In order to solve the above-described problem of the present invention, the present invention comprises a vacuum insulation material that reflects and absorbs radiant heat, and is formed in a polygonal plate shape, and a hollow portion (12) for a vacuum space is formed in an outer shell (11) formed on the outside, and a vacuum suction tube is formed on one side of the outer shell (11) to vacuum-reduce the inside so that the inside is in a vacuum state; a reinforcing core (60) installed at a predetermined interval in the hollow portion (12) inside the vacuum insulation material (10) to maintain the interval between the facing outer shells (11); a radiant heat reflecting layer (20) installed on the inner surface of one outer shell (11) of the vacuum insulation material (10) and provided to reflect radiant heat; and a radiant heat absorbing layer (30) formed on the inner surface of the other outer shell (11) of the vacuum insulation material (10) so as to face the radiant heat reflecting layer (20) and provided to absorb radiant heat.

In addition, an insulating waterproof layer (40) is formed on the outer surface of the outer skin (11) where the above-mentioned radiation heat absorption layer (30) is formed, and the insulating waterproof layer (40) is characterized by an intermediate coating layer (41) made of urethane resin, silver powder, porous ceramic filter, and body pigment, and a top coating agent (42) formed on the intermediate coating layer (41) and made of urethane resin, porous ceramic filter, flame retardant, and colored pigment.

In addition, the vacuum insulation material (10) is provided to form an insulating wall by being applied to a building that must maintain a low temperature, and is characterized in that the radiant heat reflecting layer (20) is positioned adjacent to the exterior surface of the building, and the radiant heat absorbing layer (30) is positioned on the outside.

In addition, it is characterized in that either the radiation heat absorption layer (30) or the radiation heat reflection layer (20) is formed into a cross-sectional wave shape so that the area of the radiation heat absorption layer (30) or the radiation heat reflection layer (20) is expanded.

In addition, one side outer skin (11) of the vacuum insulation material (10) is formed into a sine wave shape by a wave forming part (300) so that the area of the radiation heat reflection layer (20) or the radiation heat absorption layer (30) is expanded.

The above-mentioned wave-forming part (300) includes a lower mold (310) on which a vacuum insulation material (10) is mounted, and an upper mold (320) which is operated by a driving unit to open/close the mold at a position facing the lower mold (310) and has a plurality of wave protrusions (321) formed at a position facing the upper outer skin (11) of the mounted vacuum insulation material (10), and when the upper and lower molds (310) (320) are operated to close the mold, the upper outer skin (11) of the vacuum insulation material (10) mounted inside the mold is formed into a sine wave shape by the wave protrusions (321) to form a sine wave-shaped bending portion (W), and then the hollow portion (12) is formed in a vacuum state.

According to the above configuration and operation, the present invention has the effect of maximizing insulation performance by effectively blocking the heat flow phenomenon caused by radiant heat, which is a disadvantage of vacuum insulation, by arranging a radiant heat reflecting layer and a radiant heat absorbing layer inside a vacuum insulation material so as to face each other, and improving the structure so as to reflect and absorb radiant heat introduced into the vacuum insulation material and release the heat to the outer skin of the absorbing layer.

Additionally, the internal hollow space is formed in a vacuum state, which improves sound insulation and soundproofing performance, effectively blocking external noise.

It is environmentally friendly as it does not use materials such as foam or fiberglass that were used in existing vacuum insulation materials.

In addition, by forming an additional anti-corrosion layer on the outside of the outer skin of the vacuum insulation material, an airtight effect is added to prevent air from passing through the inside of the vacuum insulation material, thereby preventing corrosion of the outer skin due to exposure to the outside air.

FIG. 1 is a longitudinal cross-sectional view showing the entire structure of a vacuum insulation material that reflects and absorbs radiant heat according to one embodiment of the present invention.

Figure 2 is a diagram showing a thermal insulation waterproof layer of a vacuum insulation material structure that reflects and absorbs radiant heat according to one embodiment of the present invention.

Figure 3 is a configuration diagram showing a state in which a vacuum insulation material structure that reflects and absorbs radiant heat according to one embodiment of the present invention is applied to a refrigerator.

Figure 4 is a configuration diagram showing a state in which a vacuum insulation material structure that reflects and absorbs radiant heat according to one embodiment of the present invention is applied to a heating chamber.

Figure 5 is a configuration diagram showing a wave-forming part that forms a sinusoidal bending section of a vacuum insulation material structure that reflects and absorbs radiant heat of the present invention.

Figure 6 is a configuration diagram showing a modified example of a wave-forming part that forms a sinusoidal bending portion of a vacuum insulation material structure that reflects and absorbs radiant heat of the present invention.

Fig. 7 is a diagram illustrating an example of installing the vacuum insulation material of the present invention on the exterior wall of a building.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Fig. 1 is a longitudinal cross-sectional view showing the overall structure of a vacuum insulation material that reflects and absorbs radiant heat according to one embodiment of the present invention.

The present invention relates to a vacuum insulation structure that reflects and absorbs radiant heat, and is composed of a main component including a vacuum insulation material (10), a radiant heat reflection layer (20), and a radiant heat absorption layer (30) in which a radiant heat reflection layer and a radiant heat absorption layer are arranged to face each other inside the vacuum insulation material, and the structure is improved to reflect and absorb radiant heat introduced into the vacuum insulation material, thereby effectively blocking the heat flow phenomenon caused by radiant heat, which is a disadvantage of the vacuum insulation material, and maximizing the insulation performance. Each component is described in detail below.

The vacuum insulation material (10) according to the present invention is formed in a polygonal plate shape, and a hollow portion (12) for a vacuum space is formed within an outer shell (11) provided on the outside, and a vacuum suction pipe for vacuum-reducing the hollow portion (12) is provided on one side of the outer shell (11).

The above vacuum insulation material (10) is made of an airtight outer shell (11) material that has a polyhedral structure and is depressurized or sealed so that the internal hollow portion (12) is in a vacuum state.

For excellent vacuum maintenance performance, the welded area of the outer shell (11) may first be sealed with an epoxy-based sealant having excellent adhesive strength, and then a urethane-based sealant may be added on top of that.

By creating a vacuum inside, convection and conduction of heat by the air layer are blocked, resulting in significantly improved insulation performance compared to existing glass wool, urethane, and EPS insulation materials.

The radiation heat reflection layer (20) according to the present invention is installed on the inner surface of one outer surface (11) of the vacuum insulation material (10) and is provided to reflect radiation heat.

The above-mentioned radiation heat reflection layer (20) is formed of a sheet or coating having a radiation heat reflection function including a silver or aluminum sheet, and the radiation heat reflection layer (20) is formed integrally on the inner surface of the outer shell (11) or is formed separately and provided so as to be attached to one surface of the hollow portion (12). The radiation heat reflection layer (20) can also be replaced with a mirror or gold.

The radiation heat absorption layer (30) according to the present invention is formed on the inner surface of the other outer skin (11) of the vacuum insulation material (10) so as to face the radiation heat reflection layer (20), and is provided to absorb radiation heat.

The above-mentioned radiation heat absorption layer (30) is formed as a sheet or coating agent, and is formed integrally on the inner surface of the outer shell (11) or is formed separately and is provided so that it can be attached to one surface of the hollow portion (12).

In this way, the radiant heat introduced into the vacuum insulation material (10) is reflected by the radiant heat reflecting layer (20) and absorbed by the radiant heat absorbing layer (30) placed on the opposite side, so there is an advantage in that the heat flow phenomenon caused by radiant heat, which is a disadvantage of the vacuum insulation material, can be effectively blocked.

FIG. 2 is a diagram showing a configuration of an insulating waterproof layer of a vacuum insulation material structure that reflects and absorbs radiant heat according to one embodiment of the present invention, and an insulating waterproof layer (40) can be formed on the outer surface of the outer skin (11) on which the radiant heat absorption layer (30) is formed.

The above insulating waterproof layer (40) includes an intermediate coating layer (41) made of urethane resin, silver powder, porous ceramic filter, and body pigment, and a top coating agent (42) formed on the intermediate coating layer (41) and made of urethane resin, porous ceramic filter, flame retardant, and colored pigment.

At this time, the urethane resin constituting the intermediate coating layer (41) uses a urethane resin with excellent elasticity so that the coating film itself can withstand external impact and prevent cracks caused by impact. In addition, the silver powder uses a non-leafing type aluminum paste and has excellent insulation properties, heat resistance, and ultraviolet reflection capabilities, and the silver particles are arranged in a cross pattern to exhibit excellent durability. In addition, the porous ceramic filter is provided to improve insulation properties and heat resistance by using a micro-type porous ceramic. In addition, the body pigment uses clay with excellent refractory properties instead of the general calcium carbonate and talc to improve refractory properties.

And the urethane resin constituting the above-mentioned coating agent (42) uses a urethane resin with excellent elasticity so that the coating film itself can withstand external impact and prevent cracks caused by impact. In addition, the porous ceramic filter uses a micro-type porous ceramic to improve insulation and heat resistance, the fire retardant uses magnesium hydroxide with excellent flame retardancy, and the colored pigment uses titanium dioxide with excellent weather resistance, heat resistance, and ultraviolet reflectivity.

In this way, the insulating waterproof layer (40) is formed by forming an intermediate coating layer (41) and a top coating agent (42) on the surface after construction of an insulating layer made of insulating urethane foam, an insulating layer made of rust-proofing work, and an exposed waterproof layer, thereby protecting the vacuum insulation material (10) from ultraviolet rays, and when finishing the exterior wall of a building using the vacuum insulation material (10), the insulation, waterproofing, and soundproofing properties are greatly improved.

Referring to Fig. 2 (b), an anti-rust layer (50) can be further formed on the outside of the outer shell (11) constituting the vacuum insulation material (10). For example, the anti-rust layer (50) can be formed of a non-penetrating type aluminum paste.

In this way, the outer surface of the outer skin is closely covered by the anti-corrosion layer (50), thereby adding an airtight effect to prevent air from passing into the vacuum insulation material (10) and preventing corrosion of the outer skin (11) due to exposure to outside air.

Meanwhile, as shown in Fig. 2 (c), a reinforcing core (60) may be further configured to be installed in the thickness direction inside the vacuum insulation material (10) to maintain a gap between the facing outer skins (11).

The above reinforcing core (60) is formed of a material with excellent insulation properties, such as glass fiber or synthetic resin, and is arranged at a predetermined interval in the hollow portion (12). Even when a heavy load is applied from the outside under vacuum pressure, it is formed between a pair of outer layers to reinforce the strength of the vacuum insulation material (10) while maintaining a constant interval in the hollow portion and supporting it firmly. This prevents the hollow portion (12) from collapsing or shrinking due to internal vacuum pressure.

FIG. 3 is a diagram showing a state in which a vacuum insulation material structure that reflects and absorbs radiant heat according to one embodiment of the present invention is applied to a refrigerator. The vacuum insulation material (10) can be provided to form an insulating wall applied to a building or warehouse that must maintain a low temperature to prevent food, etc. from spoiling.

At this time, the arrangement direction of the vacuum insulation material (10) is such that the radiation heat reflection layer (20) is adjacent to the outer surface of the refrigerator (100), and the radiation heat absorption layer (30) is positioned on the outside, as shown in FIG. 3.

Accordingly, in an environment where the outside air of the refrigerator (100) is high, high-temperature heat is blocked from convection and conduction by the internal vacuum, and radiant heat is reflected by the radiant heat reflection layer (20) and absorbed by the radiant heat absorption layer (30).

The radiant heat absorbed by the above-mentioned radiant heat absorption layer (30) is designed to be radiated to the outside by a heat flow phenomenon when the surrounding temperature decreases, thereby blocking the penetration of external heat energy into the interior of the refrigerator (100).

FIG. 4 is a configuration diagram showing a state in which a vacuum insulation material structure that reflects and absorbs radiant heat according to one embodiment of the present invention is applied to a heating room. The vacuum insulation material (10) may be installed on the outer wall of a drying room or heating room (200) that must keep the inside warm to form an insulating wall.

At this time, the radiation heat absorption layer (30) is positioned adjacent to the inner surface of the heating chamber (200), and the radiation heat reflection layer (20) is positioned on the outside.

Accordingly, the heat energy emitted from inside the hot storage (200) is reflected by the radiation heat reflection layer (20) and absorbed by the radiation heat absorption layer (30), and the radiation heat absorbed by the radiation heat absorption layer (30) is conducted to the outer wall of the hot storage (200) through the outer skin (11) that contacts the hot storage (200) and can be reabsorbed into the inside of the hot storage, and in particular, the thermal efficiency of the hot storage can be improved by reducing the temperature difference between the inside and the outside surface of the hot storage.

Hereinafter, another embodiment of the vacuum insulation material provided by the present invention and a method for manufacturing the same will be described. One of the radiation heat absorption layer (30) or the radiation heat reflection layer (20) is characterized in that it is formed into a cross-sectional wave shape so as to expand the surface area of the radiation heat absorption layer (30) or the radiation heat reflection layer (20).

FIG. 5 is a schematic diagram showing another embodiment of a vacuum insulation material structure that reflects and absorbs radiant heat of the present invention, and a wave-forming part that forms a sinusoidal bending part.

As shown, one outer skin (11) of the vacuum insulation material (10) on which the radiation heat absorption layer (30) is formed is formed into a sinusoidal shape by a wave-forming part (300) when viewed in cross-section, so that the area of the radiation heat absorption layer (30) is expanded.

The above wave-forming part (300) includes a lower mold (310) on which a vacuum insulation material (10) is mounted, and an upper mold (320) that is operated to open and close the mold by a driving unit at a position facing the lower mold (310), and on which a plurality of wave protrusions (321) are formed at a position facing the upper outer skin (11) of the mounted vacuum insulation material (10).

According to the above configuration, in operation, when the upper and lower molds (310)(320) are in a mold-joint operation, the upper outer shell (11) on which the radiation heat absorption layer (30) is formed by the wave projection (321) as shown in Fig. 5 (b) is formed into a sinusoidal shape to form a sinusoidal bending portion (W). Thereafter, the entrance of the outer shell (11) is sealed under vacuum conditions, or the inside of the hollow portion (12) is vacuumed through a vacuum suction tube formed on one side of the outer shell (11) to create a vacuum state.

In this way, as the outer shell (11) is formed into a sine wave shape through the wave forming part (300), the surface area of the radiation heat absorption layer (30) increases, and the radiation heat reflected from the radiation heat reflection layer (20) can be absorbed more effectively, thereby greatly improving the insulation performance of the vacuum insulation material.

Meanwhile, when manufacturing a vacuum insulation material to be applied to the outer wall of a heating chamber (200), as illustrated in FIG. 6, a shape-maintaining protrusion (400) is formed on the outer wall of the heating chamber (100) (200), and the shape-maintaining protrusion (400) is engaged with the concave portion of the sinusoidal bending portion (W) to restrain the radiation heat absorption layer (30) in a sinusoidal shape, thereby maintaining the shape of the sinusoidal bending portion (W) in its initial state for a long period of time, thereby improving the insulation performance of the heating chamber (200).

The vacuum insulation material of the present invention described above has been described as being applied to refrigerators and warming chambers for the purpose of explaining embodiments, but is not limited thereto, and can be applied to interior and exterior materials of various buildings, insulating walls of LNG ships requiring extreme temperature conditions, and other industrial fields such as machinery, where insulation is required, and thus, it is an invention with very high industrial applicability.

Fig. 7 is a diagram showing an example of installing the vacuum insulation material of the present invention on the exterior wall of a building, and has the versatility of being able to install it by changing the positions of the radiation heat reflection layer (20) and the radiation heat absorption layer (30) depending on the installation area or purpose.

For example, when the radiation heat absorption layer (30) is installed so as to be adjacent to the outside air as shown in (A), the radiation heat introduced into the vacuum insulation material (10) is reflected by the radiation heat reflection layer (20) and absorbed by the radiation heat absorption layer (30) placed on the opposite side, so that the heat flow phenomenon due to radiation heat, which is a disadvantage of the vacuum insulation material, can be effectively blocked.

On the other hand, when the radiation heat reflecting layer (20) is installed so as to be adjacent to the outside air as shown in (B), the radiation heat incident on the surface of the vacuum insulation material (10) is reflected by the radiation heat reflecting layer (20) to minimize the radiation heat transferred into the inside of the vacuum insulation material (10), and the radiation heat absorbing layer (30) installed on the opposite side of the radiation heat reflecting layer (20) is positioned on the surface of the object to be insulated to absorb the heat energy transferred by conduction or radiation from the object, thereby reducing the rapid temperature difference between the vacuum insulation material (10) and the object, thereby having the effect of effectively maintaining the adhesive strength of the vacuum insulation material (10) due to condensation, etc.

While the detailed description of the present invention has described the most preferred embodiments thereof, it will be appreciated that various modifications are possible without departing from the technical scope of the present invention. Therefore, the scope of protection of the present invention should not be limited to the above-described embodiments, but should also extend to the technologies described in the following claims and equivalent technical means derived from these technologies.

The vacuum insulation material of the present invention is a highly efficient insulation structure that blocks conduction and convection through vacuum and effectively controls even radiant heat with opposing reflective and absorbent layers. It can be used not only as an insulation material for the exterior walls, roofs, and interior walls of buildings, but can also be widely used in all fields requiring insulation, such as LNG ships requiring extreme temperature control and various industrial machines, and thus has very high industrial applicability.

Claims (6)

A vacuum insulation material (10) formed in a polygonal plate shape, in which a hollow portion (12) for a vacuum space is formed within an outer shell (11) formed on the outside, and a vacuum suction tube is formed on one side of the outer shell (11) to vacuum-reduce the inside, so that the inside is in a vacuum state; A reinforcing core (60) installed at a predetermined interval in the hollow portion (12) inside the vacuum insulation material (10) to maintain the interval between the facing outer skins (11); A radiation heat reflecting layer (20) installed on the inner surface of one outer surface (11) of the vacuum insulation material (10) and provided to reflect radiant heat; and It includes a radiation heat absorption layer (30) formed on the inner surface of the other outer skin (11) of the vacuum insulation material (10) so as to face the radiation heat reflection layer (20) and provided to absorb radiation heat; A vacuum insulation structure that reflects and absorbs radiant heat, characterized in that radiant heat introduced into the vacuum insulation material (10) is reflected by a radiant heat reflecting layer (20) and absorbed by a radiant heat absorbing layer (30) arranged on the opposite side. In paragraph 1, An insulating waterproof layer (40) is formed on the outer surface of the outer shell (11) where the above-mentioned radiation heat absorption layer (30) is formed, The above insulation waterproof layer (40) is An intermediate coating layer (41) composed of urethane resin, silver powder, porous ceramic filter, and body pigment, A vacuum insulation structure that reflects and absorbs radiant heat, characterized by including a top coating agent (42) formed on a middle coating layer (41) and composed of a urethane resin, a porous ceramic filter, a flame retardant, and a colored pigment. In paragraph 1, The above radiation heat reflection layer (20) is formed of any one of a coating agent, aluminum sheet, mirror, or gold having a radiation heat reflection function, A vacuum insulation material (10) is a vacuum insulation material structure that reflects and absorbs radiant heat, characterized by further forming an anti-corrosion layer (50) on the outside of the outer shell (11) that constitutes the vacuum insulation material. In paragraph 1, The above vacuum insulation material (10) is provided to form an insulating wall and is applied to a building that must maintain a low temperature. A vacuum insulation structure that reflects and absorbs radiant heat, characterized in that a radiant heat reflecting layer (20) is positioned adjacent to the exterior surface of a building, and a radiant heat absorbing layer (30) is positioned on the outside. In paragraph 1, A vacuum insulation structure that reflects and absorbs radiant heat, characterized in that either the radiant heat absorption layer (30) or the radiant heat reflection layer (20) is formed into a cross-sectional wave shape so that the area of the radiant heat absorption layer (30) or the radiant heat reflection layer (20) is expanded. In paragraph 1, One outer skin (11) of the above vacuum insulation material (10) is formed into a sine wave shape by a wave forming part (300) so that the area of the radiation heat reflection layer (20) or the radiation heat absorption layer (30) is expanded. The above wave-forming part (300) includes a lower mold (310) on which a vacuum insulation material (10) is mounted, and an upper mold (320) that is operated by a driving unit at a position facing the lower mold (310) to open/close the mold, and on which a plurality of wave protrusions (321) are formed at a position facing the upper outer skin (11) of the mounted vacuum insulation material (10). A vacuum insulation material structure that reflects and absorbs radiant heat, characterized in that when the upper and lower molds (310)(320) are in a molding operation, the upper outer skin (11) of the vacuum insulation material (10) that is seated inside the mold by the wave projection (321) is formed into a sine wave shape to form a sine wave bending portion (W), and then the hollow portion (12) is formed in a vacuum state.