Condensation-suppressing metal roof structure

Abstract

To provide a condensation suppression panel 10 with a simple and inexpensive structure that can effectively suppress condensation on the interior side of a metal roof 4 and a condensation suppression metal roof structure 20 that can be installed on an existing metal roof 4 at a low cost.SOLUTION: A condensation suppression panel 10 is composed of a plate-shaped support member 1, an upper reflective layer 2 laminated on the upper side of the support member 1 and having a higher reflectivity than that of the support member 1, and a lower reflective layer 3 laminated on the lower side of the support member 1 and having a higher reflectivity than that of the support member 1. The condensation suppression panel 10 is installed on a metal roof 4 via mounting members with its upper reflective layer 2 facing upward, to constitute a condensation suppression metal roof structure 20.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention provides Condensation-suppressing metal roof structure More specifically, to suppress the occurrence of condensation on the interior side of a metal roof. Condensation suppression using condensation suppression panels Regarding metal roof structures. [Background technology]

[0002] As is well known, metal roofs such as folded-plate roofs, which can be constructed at relatively low cost, are widely used in large buildings such as factories, warehouses, and gymnasiums.

[0003] However, this metal roof has the drawback that condensation easily occurs on the interior side of the metal roof due to the radiative cooling phenomenon, especially in winter.

[0004] A conventional energy-saving measure is to attach insulation materials such as polyethylene foam to the interior side of metal roofs. However, this measure does not sufficiently suppress condensation on the interior side due to radiative cooling, and over long periods of use, the insulation material gradually corrodes due to condensation water, or peels off from the metal roof.

[0005] Double metal roofs, which have insulation sandwiched between a pair of upper and lower metal roofing materials, have also been implemented, but there is a problem with the installation costs being too high.

[0006] Furthermore, to date, measures to prevent condensation have been proposed, such as installing a synthetic resin net cover on a metal roof such as a folded-plate roof, or installing heat-shielding members made of metal, synthetic resin, or wood in a lattice or blind pattern (see, for example, Patent Documents 1 and 2 listed below). However, even these measures to prevent condensation have not been able to sufficiently suppress condensation during radiative cooling. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Utility Model Application Publication No. 57-159924 [Patent Document 2] Japanese Patent Application Publication No. 60-73948 Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made in consideration of the above-mentioned drawbacks of conventional metal roofs, and is capable of effectively suppressing the occurrence of condensation on the interior side of a metal roof, while also being structurally simple. in, The present invention aims to provide a condensation-suppressing metal roof structure that can be installed at low cost even on an existing metal roof. [Means for solving the problem]

[0009] The present invention provides A condensation-suppressing metal roof structure comprising a metal roof, a mounting member provided on the metal roof, and a condensation-suppressing panel fixed to the mounting member, The condensation suppression panel includes a plate-shaped support member made of steel, an upper reflective layer laminated on an upper surface side of the support member and having a higher reflectivity than the support member, and a lower reflective layer laminated on a lower surface side of the support member and having a higher reflectivity than the support member, The upper reflective layer is facing upward. The aforementioned Installed on the metal roof via a mounting member at a distance from the metal roof It has been The condensation control panel The upper reflective layer reflects solar radiation, while the lower reflective layer reflects infrared radiation from the metal roof, which is then absorbed by the metal roof.

[0010] The present invention is also characterized in that the metal roof is a folded plate roof. [Effects of the Invention]

[0011] The present invention Condensation-suppressing metal roof structure According to Condensation control panel The lower surface of the support member is provided with a lower reflective layer with a higher reflectivity than the support member, so that infrared radiation from the metal roof is reflected downward by the lower reflective layer at night and then absorbed back into the metal roof. This prevents a sudden drop in temperature of the metal roof during radiative cooling, especially in winter, and effectively suppresses condensation on the indoor side of the metal roof. [Brief explanation of the drawings]

[0012] [Figure 1] FIG. 2 is a plan view of a condensation suppression panel of the condensation suppression metal roof structure of the present embodiment. [Figure 2] FIG. 2 is an end view of the section taken along line AA in FIG. [Figure 3] FIG. 2 is an end view of the section taken along line BB in FIG. [Figure 4] FIG. 3 is a partially enlarged schematic cross-sectional view of part C in FIG. 2. [Figure 5] FIG. 1 is a side view of a condensation-suppressing metal roof structure according to an embodiment of the present invention. [Figure 6] FIG. 2 is a schematic cross-sectional view illustrating the solar radiation reflection effect of the dew condensation-suppressing metal roof structure of the present embodiment. [Figure 7] 1 is a schematic cross-sectional view illustrating the infrared radiation reflection effect of the dew condensation-suppressing metal roof structure of the present embodiment. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] As shown in FIGS. 1 to 4, Used in metal roof structures to prevent condensation The condensation suppression panel 10 is composed of a plate-shaped support member 1, an upper reflective layer 2 laminated on the upper surface side of the support member 1, and a lower reflective layer 3 laminated on the lower surface side of the support member.

[0014] 1 to 3, the support member 1 is composed of a flat plate portion 11 made of steel and having a thickness of approximately 1 mm, in the shape of a rectangular flat plate, long side rib portions 12 formed by bending the long side portions of this flat plate portion 11, long side lip portions 13 formed by bending the ends of this long side rib portion 12, and short side rib portions 14 formed by bending the short side portions of the flat plate portion 11. The strength of the support member 1 of this embodiment is increased by these long side rib portions 12, long side lip portions 13, and short side rib portions 14.

[0015] 4, the upper reflective layer 2 is laminated on the upper surface of the support member 1 and has a higher reflectance than the steel support member 1. In this embodiment, a heat-shielding paint having a higher reflectance (approximately 80 to 90%) than steel (reflectance of approximately 50 to 60%) is used as the upper reflective layer 2, and this heat-shielding paint is applied to the entire upper surface of the support member 1.

[0016] 4, the lower reflective layer 3 is laminated on the lower surface of the support member 1, and like the upper reflective layer 2, has a higher reflectance than the steel support member 1. In this embodiment, the lower reflective layer 3 uses the same heat-shielding paint as the upper reflective layer 2, and this heat-shielding paint is applied to the entire lower surface of the support member 1.

[0017] Furthermore, in this embodiment, the same heat-shielding paint as the upper reflective layer 2 is applied to the entire surface of the support member 1, including the upper and lower surfaces of the support member 1 as well as the inner and outer surfaces of the long-side rib portions 12, the upper and lower surfaces of the long-side lip portions 13, and the inner and outer surfaces of the short-side rib portions 14. This makes it possible to prevent corrosion and the like on the entire surface of the support member 1, and significantly increase the durability of the condensation suppression panel 10. Furthermore, by dip-coating the heat-shielding paint on the entire surface of the support member 1, the condensation suppression panel 10 can be produced more inexpensively.

[0018] As shown in Figure 5, the condensation-suppression metal roof structure 20 of this embodiment comprises a metal roof 4 made of a conventionally known folded-plate roof or the like, a mounting member 5 provided on the metal roof 4, and a condensation-suppression panel 10 fixed to the mounting member 5, and is constructed by installing the condensation-suppression panel 10 on the metal roof 4 via the mounting member 5 at a predetermined distance from the metal roof 4, with its upper reflective layer 2 facing upward.

[0019] The metal roof 4 of this embodiment is made of a lapped folded plate roof, and multiple mounting members 5 are fixed to the metal roof 4 using joining bolts 41 that join the folded plates together and other bolts 42. If the metal roof 4 is a seam-fastened folded plate roof, the mounting members 5 may be fitted and fixed to the seam fastening portions, and if the metal roof 4 is a tile-covered metal roof, the mounting members 5 may be screwed to the tile bars.

[0020] Furthermore, in this embodiment, the mounting member 5 and the peripheral edge of the condensation suppression panel 10 are fixed with bolts and nuts (not shown), but the mounting member 5 may be fixed to a position other than the peripheral edge of the condensation suppression panel 10 to support the middle of the condensation suppression panel 10. Furthermore, in this embodiment, the multiple condensation suppression panels 10 are installed on the metal roof 4 with gaps between them, but the multiple condensation suppression panels 10 may also be installed with almost no gaps between them.

[0021] In this way, in this embodiment The condensation control metal roof structure 20 is Because the upper reflective layer 2, which has a higher reflectivity than the support member 1, is provided on the upper surface of the support member 1, as shown in Fig. 6, most of the solar radiation RS can be reflected by the upper reflective layer 2 during the daytime, thereby suppressing a rise in temperature of the metal roof 4. Furthermore, airflow F passing through gaps between the metal roof 4 and the condensation suppression panels 10 and between the condensation suppression panels 10 can also suppress a rise in temperature of the metal roof 4.

[0022] Moreover, since a lower reflective layer 3 having a higher reflectivity than the support member 1 is provided on the underside of the support member 1, at night, as shown in Fig. 7, the infrared radiation R4 from the metal roof 4 is reflected downward by the lower reflective layer 3 and then absorbed again by the metal roof 4. This makes it possible to prevent a sudden drop in temperature of the metal roof 4 during radiative cooling, particularly in winter, and effectively suppress the occurrence of condensation on the indoor side of the metal roof 4.

[0023] Furthermore, if a lower reflective layer is not provided on the underside of the support member, as in conventional products, most of the infrared radiation R4 from the metal roof 4 is absorbed by the support member, and the support member will radiate infrared radiation to its surroundings in an amount equal to the amount absorbed by the metal roof 4. In this case, the infrared radiation radiated downward from the support member is again absorbed by the metal roof 4, which contributes somewhat to suppressing a drop in the temperature of the metal roof 4, but because the support member radiates infrared radiation not only downward but also upward, the infrared radiation energy received from the metal roof 4 cannot be effectively used to suppress a drop in the temperature of the metal roof 4.

[0024] In contrast, in this embodiment Condensation-suppressing metal roof structure 20 According to this, most of the infrared radiation energy from the metal roof 4 can be reflected by the lower reflective layer 3 and returned to the metal roof 4, so that a sudden drop in temperature of the metal roof 4 due to radiative cooling can be more effectively suppressed.

[0025] In addition, in this embodiment Condensation-suppressing metal roof structure 20 According to this, it is possible to suppress a sudden temperature rise of the metal roof 4 due to solar radiation and a sudden temperature drop due to radiative cooling, thereby suppressing noise caused by thermal expansion and contraction of the metal roof 4. Furthermore, the condensation suppression panel 10 installed on the metal roof 4 can prevent raindrops from directly hitting the metal roof 4 during rainfall, thereby significantly suppressing noise during rainfall.

[0026] Furthermore, the condensation suppression panel 10 of this embodiment has A plate made of steel The upper and lower reflective layers 2 and 3 laminated on the upper and lower surfaces of the support member 1 provide high reflectivity required for preventing condensation on the upper and lower surfaces of the panel. So, The condensation control panel 10 is provided with a strength sufficient to withstand the snow load in winter and a strength sufficient to withstand safe walking on the condensation control panel 10. Easy to hold and strong This allows the condensation control panel 10 to be produced relatively inexpensively.

[0027] Furthermore, the condensation-suppressing metal roof structure 20 of this embodiment is constructed by installing a plate-shaped condensation-suppressing panel 10 on the metal roof 4, so even if the metal roof 4 is a folded-plate roof with many irregularities, a flat space can be secured on the metal roof 4, and the surface of the metal roof 4 can be effectively utilized.

[0028] Furthermore, the condensation suppression panel 10 of this embodiment has a simple structure, which allows it to be produced inexpensively and is significantly lighter in weight. This also makes installation of the condensation suppression panel 10 easier, and the condensation suppression metal roof structure 20 can be constructed at low cost.

[0029] As described above, in this embodiment Condensation-suppressing metal roof structure 20 Although the invention has been described above, it is possible to practice the invention in other embodiments.

[0030] For example, in the above embodiment, the upper reflective layer 2 on the upper surface side of the support member 1 and the lower reflective layer 3 on the lower surface side are formed by coating with the same heat-shielding paint, but the present invention is not limited to this, and the upper reflective layer 2 and the lower reflective layer 3 may be formed by coating with different heat-shielding paints. Furthermore, the upper reflective layer 2 and the lower reflective layer 3 may be formed by adhering and laminating a material with high reflectivity, such as aluminum foil or an aluminum-deposited synthetic resin film or sheet.

[0031] In addition, in the above embodiment, the upper reflective layer 2 and the lower reflective layer 3 are laminated directly on the upper and lower surfaces of the support member 1, but the present invention is not limited to this, and the upper reflective layer 2 may be laminated on the upper surface side of the support member 1 via a heat insulating layer, or the lower reflective layer 3 may be laminated on the lower surface side of the support member 1 via another heat insulating layer. These heat insulating layers can further improve heat blocking properties during the daytime and radiative cooling.

[0032] In addition, the support member 1 may be provided with a plurality of ventilation holes penetrating its upper and lower surfaces, and the air flow passing through these ventilation holes may be used to suppress the temperature rise of the metal roof 4 due to solar radiation.

[0033] The present invention may be embodied in various other forms, including improvements, modifications, and variations based on the knowledge of a person skilled in the art, without departing from the spirit of the invention. Furthermore, within the scope of producing the same action or effect, any of the features specifying the invention may be substituted with other technology, and an integrally configured feature of the invention may be composed of multiple components, or an integrally configured feature of the invention consisting of multiple components may be embodied. [Explanation of symbols]

[0034] 10 Condensation control panel 20 Condensation-suppressing metal roof structure 1 Support member 2 Upper reflective layer 3 Lower reflective layer 4. Metal roof 5 Mounting material RS solar radiation R4 Infrared radiation (from metal roofs)

Claims

1. A condensation-suppressing metal roof structure comprising a metal roof, a mounting member provided on the metal roof, and a condensation-suppressing panel fixed to the mounting member, The condensation control panel includes a plate-shaped support member made of steel, an upper reflective layer laminated on the upper surface of the support member and having a higher reflectivity than the support member, and a lower reflective layer laminated on the lower surface of the support member and having a higher reflectivity than the support member, and is installed on the metal roof via the mounting member at a distance from the metal roof with the upper reflective layer facing upward, A condensation-suppressing metal roof structure characterized in that the upper reflective layer of the condensation-suppressing panel reflects solar radiation, while the lower reflective layer reflects infrared radiation from the metal roof and absorbs it into the metal roof.

2. 2. The condensation-suppressing metal roof structure according to claim 1, wherein the metal roof is a folded-plate roof.

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