Interior structural body and building

Abstract

To provide an interior structural body that can reduce environmental load as much as possible and has excellent heating functionality.SOLUTION: An interior structural body 10 comprises: an interior finishing material 11 containing diatomaceous earth, emitting far-infrared rays with a wavelength of 4 μm to 20 μm, and having a far-infrared emissivity of 95% or more; and a planar heating element 13 including carbon fiber and Japanese paper, etc. as components, emitting far-infrared rays with a wavelength of 4 μm to 20 μm and having a planar heating material with far-infrared emissivity of 95% or more covered with a covering material therearound. The interior finishing material 11 is provided above the planar heating element 13. The cross-correlation coefficient between a waveform of the far infrared rays emitted from the interior finishing material 11 and the planar heating element 13 and a waveform of a wavelength in a radiation energy distribution of an ideal blackbody at 6000 Kelvin is 90% or higher.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an interior structural body used inside a building (structure) and a building using the interior structural body. [Background technology]

[0002] There has been an indoor environment control system in the past that is energy efficient, has a small difference in temperature distribution in the vertical direction indoors, and does not cause problems caused by airflow hitting the skin. Specifically, this indoor environment control system includes interior surface components (such as building materials forming wall and ceiling surfaces) made of a material containing a far-infrared emitting substance that emits and absorbs far-infrared rays and has a far-infrared emissivity of 0.6 or more, and a cooling and / or heating source having a cooling and / or heating surface made of a material containing the same far-infrared emitting substance as the far-infrared emitting substance of the interior surface components, such that when the cooling surface of the cooling source is cooled, the far-infrared emitting substance of the cooling surface absorbs the far-infrared emitting substance of the interior surface components, and / or when the heating surface of the heating source is heated, the far-infrared emitting substance of the interior surface components absorbs the far-infrared emitting substance of the heating surface. Furthermore, as an example of the indoor surface constituent components of the above-mentioned indoor environment control system (hereinafter referred to as "conventional indoor surface constituent components"), a floor surface composed of, from top to bottom, stone floor panels, metal foil sheets, a heat-generating layer using an electric heater, insulation material, and an underlying structure is given (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-96485 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional interior surface components have been effective to a certain extent in maintaining a good indoor environment. However, electric heaters are used on floors, which are an example of conventional interior surface components, and this has the problem that the expected rise in indoor temperature is not necessarily achieved. Therefore, with the demand for reducing environmental impact, there is a need to develop interior structures that can increase heating efficiency while using as little electricity, fossil fuels, etc. as possible.

[0005] The present invention has been made to solve the above problems, and aims to provide an interior structure that can reduce the environmental impact as much as possible and has excellent heating functions, as well as a building that uses said interior structure. [Means for solving the problem]

[0006] The interior structure invented to achieve the above object (hereinafter, sometimes referred to as "the present interior structure") comprises an interior finishing material containing porous inorganic minerals (diatomaceous earth, silica black, etc.), emitting far-infrared rays with a wavelength of 4 μm to 20 μm, and having a far-infrared emissivity of 95% or more (more preferably 98% or more), and a sheet-shaped heating material containing carbon fiber, Japanese paper, or nonwoven fabric as constituent materials, ... An interior structure comprising a sheet heating element covered with a covering material, and the interior finishing material provided above the sheet heating element, characterized in that the cross-correlation coefficient between the waveform of the wavelength of 4 μm to 20 μm in the far infrared rays radiated from a composite of the interior finishing material and the sheet heating element and the waveform of the wavelength of 4 μm to 20 μm in the energy distribution of the thermal radiation (blackbody radiation) of an ideal black body at 6000 Kelvin (hereinafter referred to as "thermal radiation energy distribution") is 90% or more (more preferably 95% or more).

[0007] Here, an ideal blackbody (perfect radiator) is a non-existent ideal object that completely absorbs electromagnetic waves incident from the outside across all wavelengths and can emit thermal radiation. The thermal radiation energy distribution of this ideal blackbody (radiant intensity B(l) versus wavelength (l) of an ideal blackbody at temperature T) is expressed as the Planck distribution in Equation 1. B(l)=(2hc 2 / l 5 )(1 / (e hc / lkT -1)) (Formula 1) T: Temperature (Kelvin) h: Planck's constant k: Boltzmann constant c: speed of light FIG. 1 shows the thermal radiation energy distribution (dotted line in the figure) of an ideal blackbody at 6000 K (Kelvin), which corresponds to the surface temperature of the sun as shown in Equation 1 above.

[0008] Furthermore, far-infrared emissivity is a physical quantity that indicates the strength of thermal radiation emitted by a substance, and is expressed as the ease of radiation from a general substance on a scale of 0% to 100% when the thermal radiation from an ideal black body is taken as 100% (the closer the far-infrared emissivity is to 100%, the stronger the thermal radiation).

[0009] Furthermore, the term "interior structural member" refers to a structural member that can be used as a wall material, floor material, ceiling material, or other building construction material, regardless of the construction location.

[0010] Furthermore, interior finishing materials are surface materials used in the interior of buildings that are directly visible to the user. The interior finishing materials must have a far-infrared emissivity of 95% or more (preferably 98% or more) and contain diatomaceous earth, a type of porous inorganic mineral, as a constituent material. However, the type can be anything, including hardened building materials (architectural structural materials), wallpaper, paint (plastered walls), and ceramic products (tiles). However, because thinner materials allow more far-infrared rays to pass through, a thickness of 2 mm or less is particularly preferable, with painted structures (plastered walls) being optimal.

[0011] A sheet-shaped heating element is a sheet-shaped heating element that generates heat by passing electricity through a thin layer of heat-generating material, and the heat-generating material has a far-infrared emissivity of 95% or more. It contains at least one of conductive carbon fiber, Japanese paper, and nonwoven fabric as a constituent material, and its shape, dimensions, detailed structure, etc. are not important.

[0012] The above-mentioned planar heating element is a heater material having, in particular, a heating portion in which conductive short carbon fibers (conductive carbon) are uniformly dispersed within the surface of a non-conductive structural member such as Japanese paper or nonwoven fabric, with the grain aligned in the longitudinal direction, to give it conductivity; a conductive land portion in which a part of the structural member in which the conductive short carbon fibers are dispersed is impregnated with a conductive liquid; an electrode portion electrically connected to the conductive land portion; and a power supply portion which supplies power to the heating portion via the electrode portion, and it is preferable that the heating portion has a shape that is bent into an approximately cylindrical shape so that the direction of the conductive short carbon fibers is the axial direction.

[0013] In addition, in this interior structure, an interior base material or interior primer material containing carbon fiber may be interposed between the interior finishing material and the sheet heating element.

[0014] Here, the interior base material is a member for installing an interior finishing material used to cover floors, walls, ceilings, etc. The interior primer is a material that is applied to the back surface of the interior finish material. The interior base material and primer must contain carbon (short fiber carbon, etc.). Because carbon has the property of emitting far-infrared rays, the higher the carbon content, the better in order to increase the far-infrared emissivity.

[0015] Furthermore, in this interior structure, a heat insulating material containing synthetic resin foam may be provided on the underside of the planar heating element, and it is particularly preferable that a synthetic resin foam (heat insulating material) containing carbon (short fiber carbon, etc.) is provided.

[0016] Synthetic resin foam (foamed plastic) is a synthetic resin that has been made porous by incorporating air bubbles, and can be of any type, including polyurethane (PUR), polystyrene (PS), polyethylene (PE), and polypropylene (PP). Furthermore, since carbon has the property of emitting far-infrared rays, a larger carbon content is preferable in order to increase the far-infrared emissivity.

[0017] In this interior structure, far-infrared rays in the wavelength band of 4 μm to 20 μm, which corresponds to the growth curve described below, are emitted from the planar heating element and the interior finishing material (hereinafter, sometimes referred to as "growth light wavelength band far-infrared rays"). In addition, far-infrared rays in the growth light wavelength band are also emitted from at least a portion of the carbon-containing interior base material (interior primer) and thermal insulation material. Therefore, the wavelengths of the multiple growth light wavelength band far-infrared rays emitted from each component of the interior structure and the human body radiation far-infrared described below overlap, resulting in a resonance phenomenon (vibration contraction). This amplifies and activates molecular motion, resulting in self-heating, which in turn activates cellular activity, promoting blood flow and metabolism. Thus, this interior structure effectively utilizes the thermal radiation of far-infrared rays to heat the room.

[0018] Furthermore, the present invention provides a building (hereinafter sometimes referred to as "the building") characterized in that the above-mentioned interior structural body is provided in at least a part of its frame. The structure and use of this building are not limited, and the interior structure may be used in any location, such as the interior wall, ceiling, or floor, but it is more preferable to install it on the ceiling because it does not block far infrared rays. Also, providing an interior structure includes making it into a panel and hanging it on the wall, or suspending it from a duct rail. Furthermore, it goes without saying that the more locations it is used, the more effective the effects of this interior structure will be, so it is preferable. [Effects of the Invention]

[0019] According to the present invention, it is possible to realize radiant heating, which does not heat the air, etc., rather than conduction or convection. Therefore, it is possible to reduce the environmental load as much as possible and provide an interior structure with excellent heating function and a building using the interior structure. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a graph showing the thermal radiation energy distribution of an ideal blackbody (6000K) and an interior structure of the present invention (X axis: wavelength (l), Y axis: radiation intensity). [Figure 2] 2(a) is a cross-sectional view of a building using the interior structural body of the present invention, and FIG. 2(b) is an enlarged view of the X portion of FIG. 2(a). [Figure 3] FIG. 1 is an explanatory diagram showing an overview of a temperature measurement test in a test room. [Figure 4] FIG. 1 is an explanatory diagram showing an outline of a surface temperature measurement test. DETAILED DESCRIPTION OF THE INVENTION

[0021] A preferred embodiment of the present invention will be described in detail below. However, the present invention is not limited to this embodiment, and appropriate design changes are possible within the scope of the present invention. In the description based on the drawings, the same elements are given the same reference numerals, and duplicated explanations will be omitted.

[0022] The general structure of the interior structure 10 according to an embodiment of the present invention will be described below. However, this building (not shown in its entirety) is a structure in which this interior structure 10 is used on at least a portion of the interior wall surfaces, ceiling, and floor surfaces (in this embodiment, this interior structure 10 is used only on the ceiling). This building is a general structure in which this interior structure 10 is provided on a base structure 5, and the structure itself does not have any distinctive features, so detailed explanations of its structure and places of use will be omitted.

[0023] It is preferable to use natural materials (for example, solid wood for the flooring 7) for structural materials other than the interior structure 10 in terms of far-infrared radiation performance. It is also preferable to use the same material as the interior finishing material 11, which is a component of the interior structure 10, for the wall surface 6 in terms of far-infrared radiation performance.

[0024] (1) Principle of this interior structure Among far-infrared rays (wavelength 4 μm to 1000 μm), wavelengths of 4 μm to 20 μm (preferably wavelength 6 μm to 14 μm) are known to be particularly effective on living organisms and promote their growth, and light in this wavelength range is called growth rays. Growth rays impart kinetic energy to water molecules and other molecules in the human body, promoting collisions between molecules and generating heat through these collisions. It has also been revealed that the average human body temperature is 36.5°C and that humans radiate far-infrared rays with wavelengths in the vicinity of approximately 10 μm.

[0025] On the other hand, under ideal circumstances, a resonance phenomenon occurs between electromagnetic waves with the same or similar thermal radiation spectrum and emissivity characteristics. The far-infrared rays of the growth curve and the far-infrared rays emitted by humans (hereinafter referred to as "human body radiation far-infrared rays") share some of their spectra, so when the two far-infrared rays interact with each other, a resonance phenomenon occurs, amplifying the effect of thermal radiation.

[0026] Under the above premise, when the human body is irradiated with the growth light, a resonance phenomenon occurs between the growth light and the far infrared radiation emitted by the human body, and the amplitude of the growth light is amplified, and strong kinetic energy acts on the human body, which can generate heat very efficiently with little loss. That is, the wavelength of the far-infrared radiation emitted by the human body overlaps with the wavelength of the growth curve, causing a resonance phenomenon. This amplifies and activates molecular movement inside the human body, causing self-heating, which in turn activates cellular activity and warms the body. Furthermore, warming the body promotes blood flow and metabolism, contributing to physical health.

[0027] Incidentally, the far-infrared rays emitted by an ideal black body at the above-mentioned temperature of 6000 K (hereinafter referred to as "black-body radiation far-infrared rays") contain a large amount of far-infrared rays in the wavelength band of growth light (hereinafter, emitting far-infrared rays in the wavelength band of growth light may be referred to as "emitting growth light"). On the other hand, the interior finishing material 11 described below, which contains diatomaceous earth and is used in this interior structure 10, emits far-infrared rays, which have a thermal radiation energy distribution (solid line in Figure 1) that is similar to the thermal radiation energy distribution of an ideal black body (dotted line in Figure 1), and therefore is inevitably able to emit a large amount of growth rays. This interior structure 10 utilizes the property of being able to emit growth rays, and based on the above principle, is able to perform a heating function for the room by utilizing the thermal radiation effect of the growth curve (far infrared rays) and the resonance phenomenon between the growth curve and the far infrared rays emitted by the human body.

[0028] Furthermore, the similarity between the waveform of the 4 μm to 20 μm wavelength of each far infrared ray radiated by the composite of the interior finishing material 11 and the sheet heating element 13 used in the present structural material 10 and the waveform of the 4 μm to 20 μm wavelength of the thermal radiation energy distribution of an ideal black body is ensured by the fact that the cross-correlation coefficient between the waveform of the 4 μm to 20 μm wavelength of each far infrared ray radiated by the interior finishing material 11 and the sheet heating element 13 and the waveform of the 4 μm to 20 μm wavelength of the thermal radiation energy distribution of an ideal black body is 90% or more (more preferably 95% or more).

[0029] (2) Composition of the interior structure This interior structure 10 comprises an interior finishing material 11, an interior base material 12 (which may also be an interior primer), a planar heating element 13, and a heat insulating material 14, which are layered in order from the side (top) of the interior space S where it will be installed (Figure 2).

[0030] First, the present interior structure 10 is characterized by combining an interior finishing material 11 and a planar heating element 13 (and further an interior base material 12) that emit far-infrared rays with a wavelength of 4 μm to 20 μm and have a far-infrared emissivity of 95% or more (more preferably 98% or more), and by using the constituent materials described in detail below, the interior structure 10 has the above properties.

[0031] In this regard, the conventional interior surface components described above have a stone floor panel and a heat generating layer using an electric heater. However, no detailed explanation was given regarding the characteristics of this interior structure with regard to the stone floor panels and electric heaters, and the inventors conducted experiments through trial and error with combinations of various interior structures and heating elements (interior base materials, etc.) and discovered that this interior structure 10, which comprises the interior finishing material 11 with the above-mentioned characteristics, the planar heating element 13 (and further the interior base material 12), and an insulating material 14 using the carbon-containing synthetic resin foam described below, exhibits a remarkable heat radiation effect (see Examples).

[0032] (Interior finishing materials) The interior finishing material 11 must contain diatomaceous earth, and for example, the following building materials (structural materials), wallpaper, paint, etc. can be used.

[0033] That is, the building material is a building material composition containing powdered slaked lime, white cement, and powdered calcined white diatomaceous earth, and preferably contains 100 parts by weight of the powdered slaked lime, 80 to 90 parts by weight of the white cement, 50 to 60 parts by weight of the powdered calcined white diatomaceous earth, 11 to 67 parts by weight of a powdered clayey material (sepiolite, bentonite, and zeolite are preferably used), and as auxiliary agents, 6 to 7 parts by weight of a powdered acrylic agent that promotes adhesion to the base material, 4 to 6 parts by weight of a water-soluble nonionic cellulose ether that is a water-retaining thickener, and 1 to 2 parts by weight of an antifoaming agent. The material may further contain porous inorganic minerals such as air-dried diatomaceous earth, red diatomaceous earth, zeolite, and sepiolite, or Chinese loess.

[0034] In addition, wallpaper (wallpaper with tempering properties in which adhesive is applied to the back side of a flexible backing paper) has a moisture-blocking layer, which is a polycoat layer made of polyethylene resin that blocks moisture such as adhesive that passes through the backing paper, and a moisture-absorbing and desorbing layer, which is a pulp nonwoven fabric that can absorb and radiate moisture from the indoor space S side, laminated on the surface of the moisture-blocking layer, and a paint layer whose main component is powdered calcined diatomaceous earth (powdered porous inorganic mineral) is provided on the surface of the moisture-absorbing and desorbing layer.

[0035] The paint is preferably an aqueous paint having a thixotropic index of 3.0 to 4.0, the paint comprising as its main constituent a fine powder composition containing a fine powder thixotropic auxiliary agent and a fine powder inorganic porous material containing diatomaceous earth and zeolite, the first and second agents containing a fine powder clay mineral containing pyrophyllite and sepiolite as the main component and hydroxypropyl methylcellulose as the main component, the first and second agents having 2 wt % aqueous solution viscosities of 2400 mPa·S to 4500 mPa·S and 64000 mPa·S to 90000 mPa·S at 20°C, respectively, and the fine powder composition dispersed and dissolved in water, the water-based paint preferably having a thixotropic index of 3.0 to 4.0, the first agent being 67 wt % to 91 wt % of the thixotropic auxiliary agent, and the second agent being 9 wt % to 33 wt % of the thixotropic auxiliary agent.

[0036] The clay mineral is composed of 34% to 90% by weight of pyrophyllite and 10% to 66% by weight of sepiolite, and the inorganic porous material is composed of 2% to 33% by weight of diatomaceous earth and 67% to 98% by weight of zeolite, and the composition contains 0.02 to 0.10 parts by weight of a thixotropy aid and 1.0 to 3.0 parts by weight of inorganic porous material per 1 part by weight of clay mineral.It is even more preferable to add 1.0 to 3.0 parts by weight of water per 1 part by weight of the fine powder composition to disperse and dissolve the composition.

[0037] (Interior base materials, etc.) The interior base material 12 (interior primer material) contains short carbon fibers (chopped carbon fiber, milled carbon fiber) such as carbon black, carbon fiber, and carbon nanotubes.

[0038] (sheet heating element) The sheet heating element 13 has a structure in which a sheet heating material is covered with a covering material. The sheet heating material is a heater material having a heating portion in which chopped carbon fibers (conductive carbon) (approximately 3 mm to 6 mm) are uniformly dispersed in the plane of Japanese paper (a non-conductive structural member) (which may also be nonwoven fabric) with the grain aligned in the longitudinal direction to give it conductivity, a conductive land portion in which a portion of the structural member in which the conductive chopped carbon fibers are dispersed is impregnated with a conductive liquid, an electrode portion electrically connected to the conductive land portion, and a power supply portion that supplies power to the heating portion via the electrode portion, and the heating portion is preferably bent into an approximately cylindrical shape with the grain of the conductive chopped carbon fibers aligned in the axial direction. The power supply portion is connected to a commercial power source 15.

[0039] The covering material is preferably an insulating material, and can be laminated with, for example, vinyl chloride, glass epoxy resin, or the like. It is not necessary to cover the entire surface of the sheet-shaped heating material, and when placing electrodes or the like, it is possible to cover only part of the area where the electrodes are to be placed, such that the insulating material is not covered. In this embodiment, Japanese paper is used for the sheet heating material 13, and so waterproofing can be improved by covering it with a highly water-resistant insulator.

[0040] As described above, the conductive carbon chopped fibers of the sheet heating element 13 are uniformly dispersed within the surface of the Japanese paper. Carbon emits far-infrared rays with wavelengths of 2.0 μm to 25 μm, which corresponds to the wavelengths that make up growth rays. Furthermore, when combined with Japanese paper, it has the property of achieving a far-infrared emissivity of 95% or more.

[0041] (Insulation material) The heat insulating material 14 is primarily made of porous synthetic resin, such as polyurethane (PUR), polystyrene (PS), polyethylene (PE), or polypropylene (PP), which is infused with air bubbles, and contains short carbon fibers (chopped carbon fiber, milled carbon fiber) such as carbon black, carbon fiber, and carbon nanotubes (hereinafter, this synthetic resin foam will be referred to as "carbon-containing synthetic resin foam"). As such, the heat insulating material contains short carbon fibers, and the carbon radiates far-infrared wavelengths of 2 μm to 20 μm, which constitute growth rays.

[0042] In the conventional interior surface component, a heat insulating material is provided below the heat generating layer using an electric heater. However, no detailed explanation is given regarding the insulating material, and the inventors, through trial and error, conducted experiments combining insulating materials of various materials with other interior finishing materials and heating elements, and discovered that the interior structure 10, which comprises the interior finishing material 11 having the above-mentioned characteristics, the planar heating element 13, and the insulating material 14 made of the carbon-containing synthetic resin foam, exhibits a remarkable heat radiation effect (see Examples).

[0043] (Relationship with the radiant energy distribution of an ideal blackbody) The cross-correlation coefficient between the waveform of wavelengths of 4 μm to 20 μm in the far infrared rays radiated from the composite of the interior finishing material 11 and the sheet heating element 13 in this interior structure 10 and the waveform of wavelengths of 4 μm to 20 μm in the radiation energy distribution of an ideal blackbody at 6000 Kelvin is 90% or more (more preferably 95% or more).

[0044] (3) Effects of this interior structure In the building in which the interior structure 10 is used, growth rays are radiated from the sheet heating element 13 into the interior space S of the building after passing through the interior primer 12 and the interior finish material 11. At that time, a large amount of growth rays is also radiated from the interior finish material 11, and growth rays are also radiated from the interior base material 12 and the heat insulating material 14 into the interior space S of the building due to the action of carbon.

[0045] In particular, the far-infrared rays emitted from the composite of the planar heating element 13 and the interior finishing material 11 have properties similar to the spectrum of far-infrared rays emitted by a blackbody, and have a high-intensity far-infrared emissivity of 95% or more, resulting in the emission of high-energy far-infrared rays in the growth light wavelength band. As a result, the wavelengths of the far-infrared rays in the growth light wavelength band and the far-infrared rays emitted by the human body overlap, causing a resonance phenomenon. This in turn amplifies and activates molecular motion, resulting in self-heating, which in turn activates cellular activity, promoting blood flow and metabolism. In this way, the interior structure 10 can effectively heat the room through the thermal radiation of far-infrared rays. Furthermore, it has been revealed that the interior structure 10 can achieve a certain degree of power saving effect and also has a high heat storage effect compared to conventional heating devices.

[0046] Furthermore, among the above effects, the most direct and most outstanding effect is the heat generation effect, which can significantly reduce indoor heating costs and also contribute to global warming, etc. Furthermore, the interior structure 10 can achieve radiant heating, rather than conduction or convection, which does not heat the air. This prevents the spread of polluted air (floating particles such as dead mites and mold) that occurs in convection heating and is one cause of allergies. This eliminates the need for unnecessary air purification, making it possible to create a clean and healthy indoor space S, which in turn contributes to improving the health of the users living in the indoor space S.

[0047] In addition, because the interior base material 12 and the heat insulating material 14 that make up this interior structure 10 contain carbon, growth rays are also radiated into the interior space S of the building from the interior base material 12 and the heat insulating material 14. This causes a resonance phenomenon between the growth rays and far infrared rays radiated by the human body radiated from the sheet heating element 13 and the interior finishing material 11 and the growth rays radiated from the base material, etc., further enhancing the above-mentioned effects.

[0048] Furthermore, the interior finishing material 11 constituting the present interior structure 10 contains diatomaceous earth, which provides humidity control, deodorizing, mildew prevention, antibacterial and non-combustible effects.

[0049] Although an example of a preferred embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and appropriate design changes are possible within the scope of the present invention.

[0050] Furthermore, with regard to the specifications, materials, dimensions, shapes, etc. of each component of this interior structure and this building, such as the interior finishing materials, interior base materials or interior primer materials, surface heating elements, and insulation materials, various structures can be used as long as they have the basic configuration. [Example]

[0051] The following describes the results of various tests that verified the performance of this interior structure. Note that in the following description, the components of this interior structure will not be numbered.

[0052] [Laboratory temperature measurement test] (1) Overview of the test In order to verify the performance of the interior finishing materials, sheet heating element, and insulation material (synthetic resin foam) used in this interior structure, temperature measurement tests were conducted in a test room in which test specimens 1-1 and 1-2, which are the interior structures of this interior structure, and test specimens 1-3 and 1-4 (neither shown), which are interior structures that do not have the interior finishing materials or sheet heating element of this interior structure, were installed (test specimen 1-5 is a reference example in which no interior structure is installed).

[0053] (2) Test method Several 1m square cubic test rooms were created, and test specimens 1-1 to 1-4, which were created to match the dimensions of the ceiling, were placed in them. The perceived temperature in the indoor space (hereinafter referred to as "indoor temperature") was measured using a black globe thermometer (MITOMI Corporation) (Figure 3). Each of the test specimens 1-1 to 1-4 is an interior structure made by combining the interior finishing material and the heating element shown in Table 1, and was placed in the test room so that the interior finishing material faced the indoor space. The entire periphery of the test chamber is covered with the carbon-containing EPS used in test specimen 1-2 below.

[0054] [Table 1]

[0055] Details of each interior structure are as shown in Table 2 (the cross-correlation coefficient with the waveform of wavelengths from 4 μm to 20 μm in the radiant energy distribution of an ideal blackbody for each component, and the far-infrared emissivity were calculated separately through physical property tests and data analysis). In addition, test specimens 1-1 and 1-2 had a surface heating element installed in the center of the ceiling, covering one-third of the total area, and test specimen 1-3 had an electric floor heating device (not shown) installed in an area of ​​0.55m x 0.55m (each heating element was energized for 24 hours at a heat output of 50W / hour).

[0056] The test took place over a 10-day period from December 19th to December 28th, 2023, and indoor temperatures were measured at 7:30 a.m., assuming the lowest temperature. The indoor temperature was measured using a black globe thermometer placed 50 cm above the floor in the center of the test room.

[0057] [Table 2]

[0058] (3) Test results Since the indoor temperature depends on the outdoor temperature, the average value over the 10-day test period was calculated. The test results are shown in Table 3. The performance of test specimens 1-1 and 1-2 was 1.4°C and 2.7°C higher than that of test specimen 1-3, and 1.1°C and 2.4°C higher than that of test specimen 1-4, demonstrating their effectiveness. Furthermore, test specimen 1-2, which is equipped with carbon-containing EPS, was 1.3°C higher than that of test specimen 1-1, which is not equipped with carbon-containing EPS, demonstrating its effectiveness.

[0059] [Table 3]

[0060] [Surface temperature measurement test] (1) Overview of the test For the test specimen (test specimen 2-1) in which a carbon-containing base material was provided on test specimen 1-1 used in the above-mentioned laboratory temperature measurement test, surface temperature measurement tests were conducted on each interior structure in order to verify the performance of the carbon-containing base material.

[0061] (2) Test method For each of the multiple test specimens placed on a desk, the surface temperature (hereinafter referred to as "surface temperature") of the top layer (indoor space side) of each test specimen was measured using a radiation thermometer (manufactured by Custom Co., Ltd.) after heating the heating element (Figure 4). Each test specimen is a rectangular parallelepiped interior structure (210 mm x 297 cm [thickness varies]) made by layering the different materials (components) used as shown in Table 4, with test specimen 2-1 being the interior structure of claim 2 (at the time of filing), and test specimen 2-2 being an interior structure of a comparative example (note that with regard to the materials used in the interior structures in Table 4, the materials used are listed in order from the top layer [larger numbers indicate lower layer materials]).

[0062] [Table 4]

[0063] The sheet heating element 13" is a set of six 30mm x 280mm sheet heating elements. Details of each interior structure are as shown in Table 5. In this test, the surface temperature was measured at 1-minute intervals after passing electricity (heating) through the heating element at 50 watts / h at four measurement points A to D (5 cm vertically and 5 cm horizontally from each corner) and at the center E (5 points in total) shown in Figure 4, and the average value was calculated.

[0064] [Table 5]

[0065] (3) Test results The test results are shown in Table 6. As the time of energization increased, the surface temperature of this interior structure (specimen 2-1) became higher than that of the comparative interior structure (specimen 2-2), revealing that this double-layer structure has a high heat-generating effect.

[0066] [Table 6] [Explanation of symbols]

[0067] S Indoor space 5 Base structure 6 Wall 7. Flooring 10 Interior structure 11 Interior finishing materials 12 Interior underlayment 13 Planar heating element 14. Insulation

Claims

1. an interior finishing material containing diatomaceous earth, emitting far-infrared rays with a wavelength of 4 μm to 20 μm, and having a far-infrared emissivity of 95% or more; a sheet heating element that contains carbon fiber and Japanese paper or nonwoven fabric as constituent materials, radiates far-infrared rays with a wavelength of 4 μm to 20 μm, and has a far-infrared emissivity of 95% or more, and is surrounded by a covering material; An interior structure in which the interior finishing material is provided above the sheet heating element, An interior structure characterized in that a cross-correlation coefficient between the waveform of the wavelength of 4 μm to 20 μm in the far infrared rays radiated from the interior finishing material and the planar heating element and the waveform of the wavelength of 4 μm to 20 μm in the energy distribution of thermal radiation of an ideal black body at 6000 Kelvin is 90% or more.

2. 2. The interior structure according to claim 1, wherein an interior base material or interior primer material containing carbon is interposed between the interior finishing material and the sheet heating element.

3. 3. The interior structure according to claim 1, wherein a synthetic resin foam is provided on the underside of the sheet heating element.

4. A building comprising the interior structure according to claim 1 or 2 in at least a part of its frame.

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