Heat equalizer using composite of cellulose and metal

Abstract

To provide a heat equalizer installed in a large area place such as a wall, a fusuma, a ceiling, a screen or a floor for efficiently controlling an environmental space temperature.SOLUTION: There is provided a heat equalizer as means for solving the problem, in which a metal mesh sheet, such as copper, is adhesively positioned between a first cellulose sheet such as wallpaper, and a second cellulose sheet such as wallpaper and both surfaces of the metal mesh sheet are coated with a cellulose layer obtained by applying and drying a cellulose slurry containing cellulose nanofiber material dispersed in a solvent.Portions other than the coated portion, such as the mesh openings and peripheral areas of the metal mesh sheet, have a structure where the first cellulose sheet and the second cellulose sheet are bonded together via the cellulose layer. The heat equalizer has the metal mesh sheet connected to a constant-temperature heat source structure such as an earth rod buried underground, and controls the opening and closing of the connection switch by using the temperature of the metal mesh sheet and the temperature of the constant-temperature heat source structure as indicators.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a heat equalizing device that is installed on a wall, ceiling, sliding door, folding screen, etc. and has a heat equalizing function using a composite of a cellulose-containing compound and a metal material. [Background technology]

[0002] In recent years, the trend toward significant changes in weather has become more pronounced, and energy costs have risen sharply. This has led to an increasing need for more efficient temperature control technologies in living, working, and traveling environments. When considering this environmental space temperature control technology, it is also necessary to pay attention to the heat exchange and air convection that occur due to the temperature difference between the surface temperatures of the space components such as walls, ceilings, and floors in the environmental space and the air temperature within the space, which changes due to the heating and cooling equipment installed in the space. In this case, it is desirable to introduce a heat equalizer that equalizes the surface temperatures of the walls, ceiling, floor, and other parts that come into contact with the environmental space in order to improve the efficiency of temperature control in the environmental space.

[0003] Furthermore, advances in AI technology have led to the accumulation of large-scale databases known as "big data," which are necessary for the machine learning that underpins AI, and to increased performance requirements for information processing using these databases, which in turn has led to the need for finer circuit processing and faster circuit clocks for the core technologies that support these technologies, such as semiconductor circuit components and electronic device circuit components like sensors and display elements, and heat dissipation design technology to suppress temperature increases in circuits has also become important. Heat dissipation materials, which are necessary when considering this heat dissipation design technology, are a technology that deserves attention when considering the above-mentioned heat equalizer.

[0004] On the other hand, when it comes to materials used in industrial products, it is important to develop and put into practical use not only plastics and polymers that traditionally rely on imported petroleum, but also natural alternative materials that can be procured domestically, in light of efforts toward a sustainable society, such as responding to the SDGs and addressing the issue of microplastics.

[0005] Patent Document 1 discloses a technique for providing a heat dissipation material with high thermal conductivity and bendability, using a composite of thermally conductive inorganic particles and cellulose nanofibers. Patent Document 2 discloses a technique for providing a thermally conductive member having high thermal conductivity by using a cellulose fiber dispersion composite and heat-dissipating inorganic particles. Patent Document 3 discloses a technique for providing a resin molded article with high thermal conductivity using a heat-dissipating resin composition containing improved cellulose, a resin, and further inorganic particles. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-79202 [Patent Document 2] Patent Publication No. 2021-95486 [Patent Document 3] Patent Publication No. 2021-50327 Summary of the Invention [Problem to be solved by the invention]

[0007] In the methods using cellulose materials and inorganic materials disclosed in Patent Documents 1, 2, and 3, etc., a technology for combining materials at the particle level is described, but there is no description of a technology for providing heat dissipation properties applicable to a large-area heat equalization device in an environmental space.

[0008] An object of the present invention is to provide a heat equalizer that can be installed in a large area such as a wall, a sliding door, a ceiling, a screen, or a floor, in order to efficiently control the temperature of an environmental space. [Means for solving the problem]

[0009] The present invention provides a heat equalizer as a means for solving the above problems, which comprises a first cellulose sheet such as wallpaper and a second cellulose sheet such as wallpaper, and a metal mesh sheet such as copper coated on both sides with a cellulose layer obtained by applying and drying a cellulose slurry in which cellulose nanofiber material is dispersed in a solvent, and then providing a heat equalizer structure in which the first cellulose sheet and the second cellulose sheet are bonded together via the cellulose layer except for the covered areas such as the mesh openings and the peripheral areas of the metal mesh sheet.

[0010] In the present invention, the means for solving the above problems is a heat equalizing device in which a connection opening / closing switch for opening and closing the connection is provided at the connection portion where the metal mesh sheet is connected to a constant temperature heat source structure such as an earth rod buried in the ground or the rebar of a reinforced concrete building, and thermometers such as temperature sensors are installed on the metal mesh sheet and the constant temperature heat source structure, and the opening and closing of the connection opening / closing switch is controlled using the metal mesh sheet temperature obtained by the thermometers and the constant temperature heat source structure temperature as indicators. [Effects of the Invention]

[0011] According to the present invention, the temperature uniformity of large areas in an environmental space, such as walls, sliding doors, ceilings, screens, or floors, is improved, and air convection within the space is promoted, making it possible to efficiently control the temperature of the environmental space. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 1 is a schematic diagram of a heat equalizer of the present invention. [Figure 2] FIG. 2 is a diagram showing an example of an installation form of the heat equalizer of the present invention in an environmental space. [Figure 3] FIG. 3 is a system diagram in which the heat equalizer of the present invention is connected to a constant temperature heat source structure such as an earth rod buried in the ground, and an open / close switch is provided at the connection point. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present invention will be described below. The following description is of a typical embodiment of the present invention, but the present invention is not limited to this embodiment. [Example]

[0014] The heat equalizer according to the present invention is composed of a first cellulose sheet such as wallpaper, a second cellulose sheet such as wallpaper, a metal mesh sheet such as copper, and a cellulose layer obtained by applying and drying a cellulose slurry in which cellulose nanofiber material is dispersed in a solvent. Examples of the present invention will be described below. A first wallpaper measuring approximately 52 cm wide and 60 cm long was impregnated with a 2% by weight aqueous cellulose nanofiber slurry, and a copper mesh measuring approximately 45 cm x 50 cm and approximately 0.3 mm thick was placed on top of it.A second wallpaper measuring approximately 52 cm wide and 60 cm long, also impregnated with the cellulose nanofiber slurry, was then placed on top of that and allowed to dry naturally. Fig. 1 shows a copper mesh sheet bonded between a first cellulose sheet and a second cellulose sheet, and does not show the cellulose nanofiber slurry.

[0015] Figure 2 shows an example of the installation of a heat equalizer according to the present invention in a residential space. In summer, the heat equalizer according to the present invention is placed on a wall below a cooling device such as an air conditioner. Heat exchange with the cool air from the cooling device promotes convection of indoor air, keeping the temperature of the entire surface of the heat equalizer lower than that of the upper part of the space. In addition, in winter, if the heat equalizer of the present invention is placed on the wall behind a heating equipment such as a panel heater, convection of indoor air is promoted through heat exchange with the warm air from the heating equipment, and the temperature of the entire surface of the heat equalizer is maintained at a higher temperature than the lower part of the space.

[0016] FIG. 3 shows a system diagram of an embodiment in which the heat equalizer according to the present invention is thermally connected to an earth rod, which is a constant temperature heat source structure buried underground. A connection terminal is provided on the heat conductor from the earth rod, and a mechanism for opening and closing the connection with the connection terminal on the heat conductor from the heat equalizer is controlled by output signals from temperature sensors provided on the heat equalizer and the earth rod, respectively. In summer, when the temperature of the heat equalizer falls below the temperature of the earth rod due to the air conditioning system in the living environment, the thermal connection with the earth rod is released. Otherwise, the heat equalizer and the earth rod are thermally connected. In winter, when the temperature of the heat equalizer exceeds the temperature of the earth rod due to the heating system, the thermal connection with the earth rod is released. At other times, the heat equalizer and the earth rod are thermally connected.

[0017] Not limited to the above-described embodiments, the heat equalizer of the present invention can be installed on part or all of a wall, sliding door, ceiling, screen, or floor, using wallpaper material, sliding door paper material, ceiling surface material, screen material such as a folding screen, noren curtain, or folding screen, or floor material for the first and second cellulose sheets. The constant temperature heat source structure connected to the metal mesh of the heat equalizer according to the present invention may be, for example, reinforcing bars of a reinforced concrete building partly buried underground. [Industrial Applicability]

[0018] The heat equalizer of the present invention described above can be used industrially in construction materials for buildings such as residences, offices, and data center facilities, where efficient temperature control of environmental spaces is required. [Explanation of symbols]

[0019] 11: First cellulose sheet; 12: Metal mesh sheet 13... A second cellulose sheet; 21... heat equalizing device according to the present invention, 22... cooling device, 23. Heating equipment, 31. Heat equalizing device according to the present invention, 32. Constant temperature heat source structure 33 Thermal connection switch 34. Metal mesh sheet temperature measuring device 35. Temperature measurement device for constant temperature heat source structures

Claims

1. a metal mesh sheet made of a metal material disposed between a first cellulose sheet made of a compound containing cellulose or a derivative thereof and a second cellulose sheet made of a compound containing cellulose or a derivative thereof; a cellulose layer made of a compound containing cellulose or a derivative thereof covering the front and back surfaces of the metal portions of the metal mesh sheet; the first cellulose sheet bonded to the coated portions on the front surfaces of the metal portions of the metal mesh sheet via the cellulose layer; and the second cellulose sheet bonded to the coated portions on the back surfaces of the metal portions of the metal mesh sheet via the cellulose layer; and the mesh openings and the peripheral areas of the sheets other than the coated portions have a structure in which the first cellulose sheet and the second cellulose sheet are bonded to each other via the cellulose layer.

2. 2. The heat equalizer according to claim 1, wherein the cellulose layer is obtained by impregnating and applying a cellulose slurry, in which a cellulose nanofiber material is dispersed in a solvent, to the first and second cellulose sheets, and then sandwiching and bonding the metal mesh sheet between the first and second cellulose sheets, so that the cellulose slurry coats the front and back surfaces of the metal parts, and then drying the cellulose layer.

3. 3. The heat equalizer of claim 2, wherein the metal mesh sheet comprises copper.

4. The heat equalizer according to claim 3, characterized in that the first cellulose sheet and the second cellulose sheet are wallpaper material, sliding door paper material, ceiling surface material, screen material such as folding screens, noren curtains, and folding screens, or floor material, and the heat equalizer is installed on a wall, sliding door, ceiling, screen, floor, or the like.

5. 5. The heat equalizer according to claim 4, wherein the metal mesh sheet is connected to a constant temperature heat source structure such as an earth rod buried in the ground or rebar of a reinforced concrete building partially buried underground.

6. 6. The heat equalizer of claim 5, wherein a connection on / off switch for opening and closing the connection is provided at the connection between the metal mesh sheet and the constant-temperature heat source, thermometers such as temperature sensors are installed on the metal mesh sheet and the constant-temperature heat source structure, and the opening and closing of the connection on / off switch is controlled using the metal mesh sheet temperature and the constant-temperature heat source structure temperature obtained by the thermometers as indicators.

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