Radiant cooling thin plate panel omitting installation of water cooling pipe

Abstract

A radiant cooling panel capable of circulating cooling water to achieve radiant cooling, comprising: an upper plate portion in the form of a thin plate made of an aluminum alloy and provided at the top; a lower plate portion in the form of a thin plate made of an aluminum alloy and provided to correspond to the size and shape of the upper plate portion, and joined to the lower part of the upper plate portion by a roll bonding method through a high-temperature, high-pressure hot rolling process; and an upper integral flow path forming portion formed integrally on the upper plate portion through an expansion molding process by instantaneous injection of high-pressure air between the upper plate portion and the lower plate portion, such that, prior to mutual joining of the upper plate portion and the lower plate portion, a graphite printed portion is pre-formed on at least one of the surfaces facing each other of the upper plate portion and the lower plate portion to correspond to the cooling water circulation path, so that when the upper plate portion and the lower plate portion are mutually joined, a portion of the upper plate portion remains as an unbonded area relative to the lower plate portion, and after the upper plate portion and the lower plate portion are mutually joined, the upper integral flow path forming portion is formed integrally on the upper plate portion through an expansion molding process by instantaneous injection of high-pressure air between the upper plate portion and the lower plate portion to form the upper part of the cooling water circulation path. and, characterized by including a lower integrated flow path forming part formed integrally on the lower plate portion to form the lower part of the cooling water circulation path by an expansion molding process that forms the upper integrated flow path forming part. Accordingly, by circulating cooling water from the ceiling of a building to achieve radiant cooling, and by eliminating the need to individually install existing pipes that provide a circulation path for cooling water in a radiant cooling panel applied as part of an energy-saving cooling technology to replace existing air conditioning systems, two aluminum plates prepared in a thin sheet form are joined together by a roll bonding method while overlapping, and a flow path providing a circulation path for cooling water is integrally formed between the two aluminum plates through an expansion molding process, thereby enabling the production of an energy-efficient radiant cooling panel at a low cost, improving space efficiency and constructability by making it lightweight and thin, and making it easy to recycle, a radiant cooling thin sheet panel that eliminates the installation of water cooling pipes can be provided.

Description

Technology Field

[0001] The present invention relates to a radiant cooling thin-plate panel in which the installation of water cooling pipes is omitted. More specifically, it relates to a radiant cooling panel in which the installation of water cooling pipes is omitted, which is applied as part of an energy-saving cooling technology to replace existing air conditioning systems by circulating cooling water from the ceiling of a building to achieve radiant cooling, and in which there is absolutely no need to install existing pipes that provide a circulation path for cooling water individually within the panel, by having two aluminum plates prepared in a thin-plate form overlapped and joined together by a roll bonding method, and by having a flow path that provides a circulation path for cooling water formed integrally between the two aluminum plates through an expansion molding process, thereby enabling the production of an energy-high efficiency radiant cooling panel at a low cost, and allowing for improved space efficiency and constructability by being lightweight and prepared in a thin-plate form, and making recycling easier. Background Technology

[0002] Recently, the use of radiant cooling panels for indoor cooling has been attracting attention.

[0003] In other words, a cooling panel is manufactured consisting of a plate-shaped heat sink made of a material with excellent heat transfer properties, such as iron or aluminum, and a pipe through which cooling water flows is connected to the heat sink, so that the cooling water absorbs heat from the room through the heat sink and lowers the indoor temperature.

[0004] These cooling panels have the advantage of enabling eco-friendly cooling because they directly use renewable energy, such as geothermal energy, for cooling purposes, such as cooling the cooling water flowing through pipes connected to the heat sink, without relying on a heat pump.

[0005] In other words, the radiant cooling method using the aforementioned cooling panel involves installing a panel containing cooling water pipes on the ceiling to circulate cooling water and cool the room, and is attracting attention as an energy-saving cooling technology to replace the existing all-air system.

[0006] The advantages of radiant cooling include, first, that cooling energy can be reduced by using cooling water with a high heat capacity (approximately 10 to 40% reduction compared to conventional air conditioners), second, that higher quietness and comfort can be achieved compared to air conditioners, third, that refrigerant substances that cause greenhouse gases can be eliminated, and fourth, that infection with respiratory diseases such as COVID-19 caused by air conditioner circulating air can be prevented.

[0007] Therefore, as the average annual temperature rises globally due to population growth, urbanization, and global warming, sales of air conditioners are increasing by about 20% annually. Consequently, there is a growing need to use radiant cooling panels that can minimize global warming and continuously provide the cooling effect of air conditioners.

[0008] An example of a radiant cooling panel according to the prior art is disclosed in Korean Patent Publication No. 10-2012-0046599 (published on May 10, 2012, hereinafter referred to as 'Patent Document 1'), etc.

[0009] Meanwhile, a radiant cooling panel according to the prior art is composed of four or more parts, such as pipes, a heat diffusion diffuser, an outer panel, and an insulating material, and the parts are assembled using fixing pieces or the like to fix them.

[0010] However, according to the prior art, radiant cooling panels have a problem in that the manufacturing process becomes complicated and production costs may increase because cooling water pipes providing a circulation path for the cooling water must be installed individually within the panel.

[0011] In addition, according to the prior art, radiant cooling panels require cooling water pipes to be installed individually within the panel, which increases the weight and thickness, potentially leading to reduced space efficiency and constructability at the construction site.

[0012] In addition, there is a problem in that, in order to increase the thermal efficiency of a radiant cooling panel according to the prior art, a larger number of pipes must be installed within the panel, which significantly increases the price of the unit panel and also increases the weight, and if the panel needs to be recycled, processes such as disassembling assembled parts like pipes must be performed, which may actually reduce the effectiveness of recycling due to increased costs. Prior art literature

[0013] Republic of Korea Published Patent No. 10-2012-0046599 (Published on May 10, 2012) The problem to be solved

[0014] The objective of the present invention is to provide a radiant cooling thin-plate panel that eliminates the need for water cooling pipe installation, which is applied as part of an energy-saving cooling technology to replace conventional air conditioning systems and enables radiant cooling by circulating cooling water in the ceiling of a building. This is achieved by eliminating the need to individually install existing pipes that provide a circulation path for cooling water within the panel, by having two aluminum plates prepared in a thin-plate form overlapped and joined together by a roll bonding method, and by having a flow path that provides a circulation path for cooling water formed integrally between the two aluminum plates through an expansion molding process. This allows for the production of an energy-efficient radiant cooling panel at a low cost, while also improving space efficiency and constructability by providing a lightweight and thin-plate form, and making recycling easier. means of solving the problem

[0015] To achieve the above objective, according to the present invention, a radiant cooling panel capable of circulating cooling water to achieve radiant cooling comprises: an upper plate portion in the form of a thin plate made of an aluminum alloy and provided at the top; a lower plate portion in the form of a thin plate made of an aluminum alloy and provided to correspond to the size and shape of the upper plate portion, and joined to the lower part of the upper plate portion by a roll bonding method through a hot rolling process of high temperature and high pressure; and an upper integral flow path forming portion formed integrally on the upper plate portion through an expansion molding process by instantaneous injection of high-pressure air between the upper plate portion and the lower plate portion, so as to form the upper part of the cooling water circulation path, wherein, prior to the mutual joining of the upper plate portion and the lower plate portion, a graphite printed portion printed with graphite is pre-formed on at least one of the surfaces facing each other of the upper plate portion and the lower plate portion so as to correspond to the cooling water circulation path, such that when the upper plate portion and the lower plate portion are mutually joined, a part of the upper plate portion remains as an unbonded area relative to the lower plate portion. and, characterized by including a lower integrated flow path forming part formed integrally on the lower plate portion to form the lower part of the cooling water circulation path by an expansion molding process that forms the upper integrated flow path forming part.

[0016] Here, it is preferable that the upper integrated flow path forming part and the lower integrated flow path forming part are formed through an expansion molding process in which high-pressure air is instantaneously injected through a high-pressure injection hole pre-formed in at least one of the upper plate part and the lower plate part.

[0017] In addition, it is preferable that a cooling water inlet hose for introducing cooling water is connected to one side of the upper integrated flow path forming part and the lower integrated flow path forming part, and a cooling water discharge hose for discharging cooling water that has passed through the cooling water circulation path to the outside is connected to the other side. Effects of the invention

[0018] According to the present invention, radiant cooling is achieved by circulating cooling water from the ceiling of a building interior. In a radiant cooling panel applied as part of an energy-saving cooling technology to replace existing air conditioning systems, there is no need to individually install existing pipes that provide a circulation path for cooling water within the panel. Instead, two aluminum plates prepared in a thin sheet form are joined together by a roll bonding method while overlapping, and a flow path providing a circulation path for cooling water is integrally formed between the two aluminum plates through an expansion molding process. This allows for the production of an energy-efficient radiant cooling panel at a low cost, while also improving space efficiency and constructability by providing a lightweight and thin sheet form, and making recycling easier. This provides a radiant cooling thin sheet panel that eliminates the installation of water cooling pipes. Brief explanation of the drawing

[0019] FIG. 1 is a perspective view of a radiant cooling thin-plate panel in which the installation of water cooling pipes is omitted according to the present invention. FIG. 2 is a side view of a radiant cooling thin panel in which the installation of a water cooling pipe is omitted according to the present invention. FIG. 3 is a plan view of a radiant cooling thin-wall panel in which the installation of water cooling pipes is omitted according to the present invention. FIG. 4 is a drawing illustrating an example of a graphite printing process for forming a graphite printing portion to manufacture a radiant cooling thin panel in which the installation of water cooling pipes is omitted according to the present invention. FIG. 5 is a drawing illustrating an example of a hot rolling process for manufacturing a radiant cooling thin panel in which the installation of a water cooling pipe is omitted according to the present invention. FIG. 6 is a drawing illustrating an example of an expansion molding process for manufacturing a radiant cooling thin panel in which the installation of water cooling pipes is omitted according to the present invention. FIG. 7 is a drawing illustrating an example of a press in which the expansion molding process of FIG. 6 is performed. FIG. 8 is a perspective view of a radiant cooling thin-wall panel according to the present invention in which the installation of a water cooling pipe is omitted, in which a cooling water inlet hose and a cooling water outlet hose are respectively connected and assembled to one side and the other side of either the upper integrated flow path forming part and the lower integrated flow path forming part that have undergone the expansion molding process of FIG. 6. Specific details for implementing the invention

[0020] The following objects, other objects, features, and advantages of the present invention will be easily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms.

[0021] Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete, and to ensure that the spirit of the invention is sufficiently conveyed to those skilled in the art.

[0022] The embodiments described and illustrated herein also include complementary embodiments.

[0023] In this specification, the singular form includes the plural form unless specifically stated otherwise in the text. Components referred to as 'comprise' and / or 'comprising' as used in this specification do not exclude the presence or addition of one or more other components.

[0024] The present invention will be described in detail below with reference to the attached drawings.

[0025] FIG. 1 is a perspective view of a radiant cooling thin-plate panel in which the installation of a water cooling pipe is omitted according to the present invention; FIG. 2 is a side view of a radiant cooling thin-plate panel in which the installation of a water cooling pipe is omitted according to the present invention; FIG. 3 is a plan view of a radiant cooling thin-plate panel in which the installation of a water cooling pipe is omitted according to the present invention; FIG. 4 is a drawing illustrating an example of a graphite printing process in which a graphite printing part is formed to manufacture a radiant cooling thin-plate panel in which the installation of a water cooling pipe is omitted according to the present invention; FIG. 5 is a drawing illustrating an example of a hot rolling process for manufacturing a radiant cooling thin-plate panel in which the installation of a water cooling pipe is omitted according to the present invention; FIG. 6 is a drawing illustrating an example of an expansion molding process for manufacturing a radiant cooling thin-plate panel in which the installation of a water cooling pipe is omitted according to the present invention; FIG. 7 is a drawing illustrating an example of a press in which the expansion molding process of FIG. 6 is performed; FIG. 8 is an upper integrated flow path forming part and after undergoing the expansion molding process of FIG. 6 This is a perspective view of a radiant cooling thin-plate panel according to the present invention in which the installation of a water cooling pipe is omitted, wherein a cooling water inlet hose and a cooling water outlet hose are respectively connected and assembled to one side and the other side of one of the lower integrated flow path forming parts.

[0026] The radiant cooling thin plate panel according to the present invention, which eliminates the installation of water cooling pipes, is configured to achieve radiant cooling by circulating cooling water as shown in FIGS. 1 to 3, and comprises: an upper plate portion (100) in the form of a thin plate provided on the top and made of an aluminum alloy material; a lower plate portion (200) in the form of a thin plate provided on an aluminum alloy material and configured to correspond to the size and shape of the upper plate portion (100), which is joined to the lower part of the upper plate portion (100) by a roll bonding method through a hot rolling process of high temperature and high pressure; an upper integrated flow path forming portion (110); and a lower integrated flow path forming portion (210).

[0027] As shown in FIGS. 1 to 5, the upper plate (100) is configured to undergo a hot rolling process in which an aluminum plate is wound in the form of a coil, unwound, and transported so that the lower plate (200) is joined to the lower part.

[0028] As shown in FIGS. 1 to 5, the lower plate (200) is configured to undergo a hot rolling process in which an aluminum plate is wound in the form of a coil, unwound, and transported, thereby being joined to the lower part of the upper plate (100) from the lower part of the upper plate (100).

[0029] As an embodiment of the present invention, it is preferable that the upper plate (100) and the lower plate (200) have the same thickness as each other.

[0030] Accordingly, by forming the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210) formed through the expansion molding process described later so that their heights are equal to each other, the flow paths that provide the circulation path of cooling water in the radiant cooling thin plate panel can be formed in a balanced manner.

[0031] As shown in FIGS. 1 to 6, the upper integrated flow path forming part (110) is formed integrally on the upper plate (100) through an expansion molding process by instantaneous injection of high-pressure air between the upper plate (100) and the lower plate (200) so as to form the upper part of the cooling water circulation path, by pre-forming a graphite printing part (300) that is printed with graphite on at least one of the surfaces facing each other of the upper plate (100) and the lower plate (200) before the upper plate (100) and the lower plate (200) are joined together so that when the upper plate (100) and the lower plate (200) are joined together, a part of the upper plate (100) remains as an unjoined area with respect to the lower plate (200), and after the upper plate (100) and the lower plate (200) are joined together, the upper plate (100) and the lower plate (200) are joined together.

[0032] The lower integrated flow path forming part (210) is integrally formed on the lower plate part (200) to form the lower part of the cooling water circulation path by an expansion molding process that forms the upper integrated flow path forming part (110) as shown in FIGS. 1 to 6.

[0033] Accordingly, by circulating cooling water from the ceiling of a building to achieve radiant cooling, and by eliminating the need to install conventional pipes that provide a circulation path for cooling water in a radiant cooling panel applied as part of an energy-saving cooling technology to replace existing air conditioning systems, two aluminum plates prepared in a thin sheet form are joined together by a roll bonding method while overlapping, and a flow path providing a circulation path for cooling water is integrally formed in the panel through an expansion molding process between the two aluminum plates, thereby enabling the production of an energy-efficient radiant cooling panel at a low cost, improving space efficiency and constructability by making it lightweight and thin, and making it easy to recycle, a radiant cooling thin sheet panel that eliminates the installation of water cooling pipes can be provided.

[0034] More specifically, the radiant cooling thin panel according to the present invention, which eliminates the installation of water cooling pipes, comprises, as illustrated in FIGS. 4 to 7, a transfer process in which an upper plate (100) and a lower plate (200) are unwound in a roll-like state and transported vertically to each other, a graphite printing process in which a graphite printing section (300) is pre-formed to correspond to a cooling water circulation path on at least one of the surfaces facing each other on the upper plate (100) and lower plate (200) transported through the transfer process, a hot rolling process in which the upper plate (100) and lower plate (200) transported after the graphite printing process are joined vertically to each other, and high-pressure air is injected into one side of the vertically joined upper plate (100) and lower plate (200) transported after the hot rolling process to [remove] graphite from the upper plate (100) and lower plate (200). It is preferable to provide the printed portion (300) by sequentially undergoing an expansion molding process in which the portion formed is each swollen to form an upper integrated flow path forming portion (110) and a lower integrated flow path forming portion (210).

[0035] In the above transfer process, the plates that were wound in the form of two coils, each made of aluminum material and formed into an upper plate (100) and a lower plate (200), are unwound, and the plate forming the upper plate (100) is positioned at the top and the plate forming the lower plate (200) is positioned at the bottom. During the continuous transfer process, a straightening process is performed to spread the plates out and align them so that the positions for joining are aligned, and a brushing process is performed to improve the surface roughness so that smooth joining can be achieved.

[0036] As illustrated in FIG. 4, the graphite printing process includes a process of pre-printing the shape of a cooling water circulation path to replace existing piping with graphite ink on at least one of the surfaces facing each other of the upper plate (100) and the lower plate (200), utilizing the property of graphite having strong heat resistance at high temperatures, as a pretreatment for the hot rolling process, such that when the upper plate (100) and the lower plate (200) are joined together during the hot rolling process, the parts where the graphite printing part (300) is not formed are compressed and joined together, and the parts where the graphite printing part (300) is formed are left as they are not joined together.

[0037] Accordingly, the two plates forming the upper plate (100) and the lower plate (200), respectively, can be easily and firmly joined without the need for a separate adhesive or welding by joining during the hot rolling process that follows.

[0038] As an embodiment of the present invention, it is preferable that the graphite printing portion (300) be formed on the side of the plate forming the lower portion (200) among the surfaces where the plate forming the upper portion (100) and the plate forming the lower portion (200) face each other.

[0039] Accordingly, the graphite printing process can be made much easier and more convenient, the consumption of graphite ink used in the printing process can be reduced, and the manufacturing cost of radiant cooling thin-film panels can also be reduced.

[0040] Here, the graphite printed portion (300) formed in the graphite printing process may be formed by printing with an ink having silicon as the main component instead of graphite.

[0041] The above hot rolling process includes, as shown in FIG. 5, a preheating process in which the upper and lower plates, which are transported after passing through the graphite printing process, are preheated in a high-temperature, high-pressure atmosphere of 403 to 497°C, and immediately after the preheating process, the upper and lower plates are passed through a rolling roller (10) in a hot rolling mill to be compressed under high pressure and hot rolling is performed, and immediately after the hot rolling, the upper and lower joined panel plates are cooled by a water cooling method, and then the upper and lower joined panel plates are cut at intervals of a certain length.

[0042] Accordingly, the panel plate, in which the upper plate (100) and the lower plate (200) are joined vertically, can be arranged to have a basic specification of 300 mm in width and 1000 mm in length, and the state of being joined by hot rolling between the upper plate (100) and the lower plate (200) can be made solid.

[0043] Here, if the temperature at which the upper plate (100) and the lower plate (200) are preheated to be joined by a hot rolling process is less than 403°C, the bonding condition between the upper plate (100) and the lower plate (200) may be somewhat weak, and if it exceeds 497°C, the panel material in which the upper plate (100) and the lower plate (200) are joined may instead undergo thermal deformation and damage may occur.

[0044] The above expansion molding process includes a process in which high-pressure air is injected instantaneously into a high-pressure injection hole (400) that is pre-formed in at least one of the upper plate (100) and the lower plate (200), as shown in FIG. 6, so that the portion that remains unbonded by the graphite printed portion (300) pre-formed through the graphite printing process on the bonding surface of the panel plate material bonded in the above hot rolling process swells up, and an upper integrated flow path forming portion (110) and a lower integrated flow path forming portion (210) are formed.

[0045] That is, the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210) are preferably formed through an expansion molding process in which high-pressure air is instantaneously injected into a high-pressure injection hole (400) that is pre-formed in at least one of the upper plate part (100) and the lower plate part (200).

[0046] Accordingly, by allowing a flow path that provides a circulation path for cooling water to replace existing piping between panels formed in the form of thin plates by joining two layers of aluminum plates together to be easily formed integrally in the panel through the expansion molding process, the radiant cooling thin plate panel can be manufactured much more easily and conveniently, the manufacturing cost per unit area of ​​the radiant cooling thin plate panel can be reduced, the weight of the radiant cooling thin plate panel can be lightened, and the radiant cooling thin plate panel can be manufactured easily and conveniently in the form of a thin plate with a thickness of 10 mm or less.

[0047] As an embodiment of the present invention, it is preferable that a high-pressure injection hole (400) be pre-drilled on one side of the upper plate (100), and that the corresponding portion of the lower plate (200) be blocked.

[0048] Meanwhile, as illustrated in FIG. 7, in the expansion molding process, it is preferable that a panel in which the upper plate (100) and the lower plate (200) are joined together is fixed between the lower jig (40) and the upper jig (50) provided between the lower press (20) and the upper press (30), and that a high-pressure air injection part (60) connected to an air compressor and supplying high-pressure air of 10 MPa or more is connected to the high-pressure injection port (400) through a high-pressure injection hose (61).

[0049] Here, it is preferable that the upper jig (50) be spaced about 3 to 6 mm apart from the lower jig (40), taking into account the height at which the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210) are formed by swelling.

[0050] Meanwhile, it is preferable that the high-pressure injection hole (400) be formed such that the diameter of the hole is about 8 to 17 times the thickness of either the upper plate (100) or the lower plate (200).

[0051] Accordingly, in the above expansion molding process, the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210) can both be easily formed within the shortest possible time by injecting high-pressure air through the high-pressure injection hole (400).

[0052] Here, if the diameter of the high-pressure injection hole (400) is less than 8 times the thickness of either the upper plate (100) or the lower plate (200), the size of the high-pressure injection hole (400) becomes too small, and thus the formation of the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210) by the injection of high-pressure air in the expansion molding process may not be properly achieved, and if it exceeds 17 times, the size of the high-pressure injection hole (400) becomes too large, and thus the instantaneous injection of high-pressure air for the formation of the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210) in the expansion molding process may become disadvantageous.

[0053] Meanwhile, as shown in FIGS. 2 and FIGS. 8, it is preferable that a cooling water inlet hose (500) through which cooling water flows is connected to one side of the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210), and a cooling water discharge hose (600) through which cooling water that has passed through the cooling water circulation path is discharged to the outside is connected to the other side.

[0054] Accordingly, a radiant cooling thin panel can be completed in which the installation of a water cooling pipe is omitted, allowing the cooling water to circulate through a flow path formed integrally between the upper plate (100) and the lower plate (200) via the cooling water inlet hose (500) and then discharged to the outside via the cooling water discharge hose (600).

[0055] Here, the cooling water discharged to the outside through the cooling water discharge hose (600) is sufficiently circulated inside the panel through the flow path formed by the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210), and contains a certain amount of heat while performing the cooling action.

[0056] As an embodiment of the present invention, it is preferable that the cooling water inlet hose (500) and the cooling water outlet hose (600) be made of a urethane material to have elasticity and flexibility.

[0057] Meanwhile, as shown in FIGS. 2 and FIGS. 8, it is preferable that the cooling water inlet hose (500) be connected to one side of the radiant cooling thin panel through the inlet connector (510), and the cooling water discharge hose (600) be connected to the other side of the radiant cooling thin panel through the discharge connector (610).

[0058] At this time, it is preferable that the inlet connector (510) and the outlet connector (610) be connected to one side and the other side of the radiant cooling thin panel, respectively, by a laser welding method, and that the inlet connector (510) and the outlet connector (610) be provided to have a one-touch fitting structure so that the cooling water inlet hose (500) and the cooling water outlet hose (600) can be easily connected by a one-touch connection method.

[0059] Although the technical aspects have been described above and attached in the drawings, the technical concept of the present invention is for illustrative purposes only and is not intended to be limited. It will be understood that a person skilled in the art can make various modifications and changes to the technical concept of the present invention within the scope of the technical scope described in the claims below without departing from the technical scope. Explanation of the symbols

[0060] 100: Top plate 110: Upper integrated flow path forming part 200: Bottom plate section 210: Lower integrated flow path forming section 300: Graphite printing section 400: High-pressure injection port 500: Coolant inlet hose 600: Coolant drain hose

Claims

Claim 1 In a radiant cooling panel that enables radiant cooling by circulating cooling water, the upper part is provided with a top plate (100) in the form of a thin plate made of an aluminum alloy material; the lower part (200) in the form of a thin plate made of an aluminum alloy material, provided to correspond to the size and shape of the upper plate (100), and joined to the lower part of the upper plate (100) by a roll bonding method through a hot rolling process of high temperature and high pressure; and before the upper plate (100) and the lower plate (200) are joined together, a graphite printing part (300) printed with graphite is pre-formed on at least one of the surfaces facing each other of the upper plate (100) and the lower plate (200) so as to correspond to the circulation path of the cooling water, so that when the upper plate (100) and the lower plate (200) are joined together, a part of the upper plate (100) remains as an unbonded area with respect to the lower plate (200). A radiant cooling thin panel that eliminates the installation of water cooling pipes, characterized by comprising: an upper integral flow path forming part (110) formed integrally on the upper plate (100) through an expansion molding process by instantaneous injection of high-pressure air between the upper plate (100) and the lower plate (200) after the upper plate (100) and the lower plate (200) are joined together to form the upper part of the cooling water circulation path; and a lower integral flow path forming part (210) formed integrally on the lower plate (200) to form the lower part of the cooling water circulation path by an expansion molding process that forms the upper integral flow path forming part (110). Claim 2 A radiant cooling thin panel that eliminates the installation of water cooling pipes, characterized in that, in claim 1, the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210) are formed through an expansion molding process in which high-pressure air is instantaneously injected into a high-pressure injection hole (400) that is pre-formed in at least one of the upper plate part (100) and the lower plate part (200). Claim 3 A radiant cooling thin panel that eliminates the installation of a water cooling pipe, characterized in that, in claim 1 or 2, a cooling water inlet hose (500) through which cooling water flows is connected to one side of the upper integrated flow path forming part (110) and the lower integrated flow path forming part (210), and a cooling water discharge hose (600) through which cooling water that has passed through a cooling water circulation path is discharged to the outside is connected to the other side.

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