JP2024004947A - Condensation control panel and condensation control metal roof structure using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: 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

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a condensation suppressing panel and a condensation suppressing metal roof structure using the same, and more particularly, to a condensation suppressing panel that suppresses the occurrence of dew on the indoor side surface of a metal roof, and a metal roof structure using this condensation suppressing panel. .

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

However, this metal roof has the disadvantage that dew condensation tends to occur on the indoor side surfaces of the metal roof due to the radiation cooling phenomenon, especially during the winter.

BACKGROUND ART Conventionally, as an energy saving measure, a heat insulating material such as polyethylene foam has been attached to the indoor side surface of a metal roof. However, this measure does not sufficiently suppress condensation on the sides of the room due to radiant cooling, and after long-term use, the insulation material gradually corrodes due to condensation water, and the insulation material peels off from the metal roof. There was a problem.

Additionally, double metal roofs have been implemented in which insulation is sandwiched between a pair of upper and lower metal roofing materials, but these have the problem of being too expensive to install.

In addition, to date, to prevent condensation, synthetic resin net covers have been installed on metal roofs such as folded-plate roofs, and heat shielding members made of metal, synthetic resin, or wood have been installed in the form of lattices or blinds. It has been proposed to install it in the following (for example, see Patent Documents 1 and 2 below). However, even with these measures against condensation, it has not been possible to sufficiently suppress condensation during radiation cooling.

Utility Model Publication No. 57-159924 Japanese Patent Application Laid-Open No. 60-73948

The present invention was made in view of the above-mentioned difficulties with conventional metal roofs, and can effectively suppress the occurrence of dew condensation on the indoor side surfaces of metal roofs, and has a simple structure. It is an object of the present invention to provide an inexpensive condensation suppressing panel and a condensation suppressing metal roof structure that can be constructed at low cost even on an existing metal roof.

The present invention is a dew condensation control panel installed on a metal roof,
a plate-shaped support member; an upper reflective layer that is laminated on the upper surface of the support member and has a higher reflectance than the support member; and an upper reflective layer that is laminated on the lower surface of the support member and has a higher reflectance than the support member. a lower reflective layer having;
When installed on the metal roof with the upper reflective layer facing upward and spaced apart from the metal roof, the upper reflective layer reflects solar radiation, while the lower reflective layer reflects infrared radiation from the metal roof. It is characterized by the fact that it is reflected and absorbed by the metal roof.

Further, the present invention is characterized in that the support member is made of steel.

Further, the present invention is characterized in that the above-mentioned dew condensation suppressing panel is installed on the metal roof with the upper reflective layer facing upward, via a mounting member provided on the metal roof at a distance from the metal roof. It is said that

Further, the present invention is characterized in that the metal roof is a folded plate roof.

According to the dew condensation suppressing panel and the dew condensation suppressing metal roof structure using the same according to the present invention, since the lower reflective layer having a higher reflectance than the supporting member is provided on the lower surface of the supporting member, the metal roof structure can be used at night. The infrared radiation from can be reflected downward by the lower reflective layer and absorbed back into the metal roof. Therefore, it is possible to prevent a sudden drop in temperature of the metal roof during radiation cooling, especially during winter, and to effectively suppress the occurrence of dew condensation on the interior side of the metal roof.

It is a top view of the dew condensation suppression panel of this embodiment. FIG. 2 is an end view taken along the line AA in FIG. 1; FIG. 2 is an end view taken along the line BB in FIG. 1; FIG. 3 is a partially enlarged schematic cross-sectional view of portion C in FIG. 2; It is a side view of the dew condensation suppression metal roof structure of this embodiment. FIG. 3 is a schematic cross-sectional view illustrating the solar radiation reflection effect of the dew condensation suppressing metal roof structure of the present embodiment. FIG. 2 is a schematic cross-sectional view illustrating the infrared radiation reflection effect of the dew condensation suppressing metal roof structure of the present embodiment.

As shown in FIGS. 1 to 4, the condensation suppression panel 10 of this embodiment includes 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 surface side of the support member 1. It is composed of a laminated lower reflective layer 3.

As shown in FIGS. 1 to 3, the support member 1 includes a rectangular flat plate portion 11 made of steel with a thickness of approximately 1 mm, and long side ribs formed by bending the long sides of the flat plate portion 11. 12, a long side lip portion 13 formed by bending the end of the long side rib portion 12, and a short side rib portion 14 formed by bending the short side of the flat plate portion 11. ing. The support member 1 of this embodiment has increased strength by these long side rib portions 12, long side lip portions 13, and short side rib portions 14.

As shown in FIG. 4, the upper reflective layer 2 is laminated on the upper surface of the support member 1, and has a higher reflectance than the support member 1 made of steel. In this embodiment, a thermal barrier paint having a higher reflectance (approximately 80 to 90%) than steel material (reflectance of approximately 50 to 60%) is used as the upper reflective layer 2. The entire upper surface of member 1 is coated.

As shown in FIG. 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 support member 1 made of steel. In this embodiment, the same thermal barrier paint as the upper reflective layer 2 is used as the lower reflective layer 3, and this heat barrier paint is applied to the entire lower surface of the support member 1.

In addition, in this embodiment, the support member 1 includes, in addition to the upper and lower surfaces of the support member 1 , the inner and outer surfaces of the long side rib portion 12 , the upper and lower surfaces of the long side lip portion 13 , and the inner and outer surfaces of the short side rib portion 14 . The entire surface is coated with the same heat-shielding paint as the upper reflective layer 2. As a result, corrosion of the entire surface of the support member 1 can be prevented, and the durability of the dew condensation suppressing panel 10 can be greatly increased. Further, by dip coating the entire surface of the support member 1 with a thermal barrier coating, the dew condensation suppressing panel 10 can be produced at a lower cost.

As shown in FIG. 5, the dew condensation suppressing metal roof structure 20 of this embodiment includes 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 mounting member 5 provided on the metal roof 4. The condensation suppressing panel 10 is mounted on the metal roof 4 via the mounting member 5 at a predetermined distance with respect to the metal roof 4, with the upper reflective layer 2 facing upward. It is constructed by opening and installing the

The metal roof 4 of this embodiment is made of a stacked folded plate roof, and a plurality of mounting members 5 are fixed to the metal roof 4 using joint bolts 41 that join the folded plates and other bolts 42. In addition, when the metal roof 4 is a folded plate roof of the selvedge type, the mounting member 5 may be fitted and fixed to the selvage part, and when the metal roof 4 is a tile stick metal roof, the tile The mounting member 5 may be fixed to the rod with screws.

Further, in the present embodiment, the mounting member 5 and the peripheral edge of the condensation suppression panel 10 are fixed by bolts and nuts (not shown), but the mounting member 5 may be fixed at a position other than the peripheral edge of the condensation suppression panel 10. By doing so, the middle of the dew condensation suppressing panel 10 may be supported. Further, in this embodiment, the plurality of dew condensation control panels 10 are installed on the metal roof 4 at intervals, but the plurality of dew condensation control panels 10 may be installed with almost no gaps between each other.

As described above, in the dew condensation suppressing panel 10 and the dew condensation suppressing metal roof structure 20 of this embodiment, the upper reflective layer 2 having a higher reflectance than the supporting member 1 is provided on the upper surface of the supporting member 1. As shown in FIG. 2, most of the solar radiation RS can be reflected by the upper reflective layer 2 during the daytime, and the temperature rise of the metal roof 4 can be suppressed. Moreover, the temperature rise of the metal roof 4 can also be suppressed by the airflow F passing through the gap between the metal roof 4 and the dew condensation suppressing panel 10 or the gap between the dew condensation suppressing panels 10.

Moreover, since the lower reflective layer 3 having a higher reflectance than the supporting member 1 is provided on the lower surface of the supporting member 1, as shown in FIG. can be reflected downward by the lower reflective layer 3 and absorbed by the metal roof 4 again. Therefore, it is possible to prevent a sudden temperature drop of the metal roof 4 during radiation cooling, especially during the winter period, and to effectively suppress the occurrence of dew condensation on the indoor side surfaces of the metal roof 4.

Note that when a lower reflective layer is not provided on the lower surface side of the support member as in the conventional product, most of the infrared radiation R4 from the metal roof 4 is absorbed by the support member, and the support member The amount of infrared radiation absorbed by the roof 4 increases and is emitted to the surrounding area. At this time, the infrared radiation emitted downward from the support member is absorbed by the metal roof 4 again, which contributes to suppressing the temperature drop of the metal roof 4 to some extent. Since the infrared rays are also radiated upward, the infrared radiant energy received from the metal roof 4 cannot be effectively used to suppress the temperature drop of the metal roof 4.

In contrast, according to the condensation suppressing panel 10 and the condensation suppressing metal roof structure 20 of the present embodiment, 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. Therefore, it is possible to more effectively suppress a sudden temperature drop in the metal roof 4 due to radiation cooling.

Further, according to the dew condensation suppressing panel 10 and the condensation suppressing metal roof structure 20 of the present embodiment, it is possible to suppress a rapid temperature rise due to solar radiation on the metal roof 4 and a rapid temperature decrease due to radiation cooling, so that the metal roof 4 can be suppressed, and the condensation suppression panel 10 installed on the metal roof 4 can prevent raindrops from directly colliding with the metal roof 4. Noise during rain can also be significantly suppressed.

In addition, the dew condensation suppressing panel 10 of this embodiment can obtain high reflectance necessary for suppressing dew condensation on the upper and lower surfaces of the panel by the upper reflective layer 2 and the lower reflective layer 3 laminated on the upper and lower surfaces of the support member 1. Therefore, various design changes can be made to the material of the support member 1 itself, and various materials such as aluminum, synthetic resin, and wood can be selected in addition to steel. For example, the dew condensation control panel 10 can be easily made strong enough to withstand snow loads in winter or strong enough to safely walk on the condensation control panel 10, which provides a great degree of freedom in design. big. If the support member 1 is made of steel as in the above embodiment, it becomes possible to produce the dew condensation suppressing panel 10 with excellent strength at a relatively low cost.

Moreover, since the dew condensation suppressing metal roof structure 20 of this embodiment is configured by installing the plate-shaped dew condensation suppressing panel 10 on the metal roof 4, even if the metal roof 4 is a folded plate roof having many unevenness. Even if there is a metal roof 4, a flat space can be secured on the metal roof 4, and the metal roof 4 can be effectively utilized.

Moreover, since the dew condensation suppressing panel 10 of this embodiment has a simple structure, it can be produced at low cost and can be significantly reduced in weight. Therefore, the installation workability of the dew condensation suppressing panel 10 is also excellent, and it is possible to construct the dew condensation suppressing metal roof structure 20 at low cost.

Although the dew condensation suppressing panel 10 and the dew condensation suppressing metal roof structure 20 of this embodiment have been described above, the present invention can also be implemented in other embodiments.

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 applying the same thermal barrier paint, but the present invention is of course limited to this. Instead, the upper reflective layer 2 and the lower reflective layer 3 may be formed by coating different thermal barrier coatings. Further, the upper reflective layer 2 and the lower reflective layer 3 may be formed by laminating, for example, aluminum foil having a high reflectance, or a synthetic resin film or sheet on which aluminum is vapor-deposited.

Further, 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 surface of the support member 1 The upper reflective layer 2 may be laminated on the side with a heat insulating layer interposed therebetween, and the lower reflective layer 3 may be laminated on the lower surface side of the support member 1 with another heat insulating layer interposed therebetween. These heat insulating layers make it possible to further enhance heat shielding properties during the daytime and during radiative cooling.

Further, the support member 1 may be provided with a plurality of ventilation holes passing through its upper and lower surfaces, and the airflow passing through the ventilation holes is used to suppress the temperature rise of the metal roof 4 due to solar radiation. Good too.

The present invention may be implemented with various improvements, modifications, and variations based on the knowledge of those skilled in the art without departing from the spirit thereof. Additionally, any of the matters specifying the invention may be replaced with another technology within the scope of producing the same action or effect, and the matters specifying the invention that are integrally constituted may be replaced with other techniques. Alternatively, the matters specifying the invention made up of a plurality of members may be implemented in an integrated form.

10 Condensation suppression panel 20 Condensation suppression metal roof structure 1 Support member 2 Upper reflective layer 3 Lower reflective layer 4 Metal roof 5 Mounting member RS Solar radiation R4 (from metal roof) Infrared radiation

Claims (4)

A condensation control panel installed on a metal roof,
a plate-shaped support member;
an upper reflective layer that is laminated on the upper surface side of the support member and has a higher reflectance than the support member;
a lower reflective layer laminated on the lower surface side of the support member and having a higher reflectance than the support member;
Equipped with
When installed on the metal roof with the upper reflective layer facing upward and spaced apart from the metal roof, the upper reflective layer reflects solar radiation, while the lower reflective layer reflects infrared radiation from the metal roof. A dew condensation control panel that reflects and absorbs condensation on the metal roof. The condensation suppression panel according to claim 1, wherein the support member is made of steel. The dew condensation suppressing panel according to claim 1 or 2 is installed on the metal roof at a distance from the metal roof via a mounting member provided on the metal roof with the upper reflective layer facing upward. A metal roof structure that suppresses condensation. The dew condensation suppressing metal roof structure according to claim 3, wherein the metal roof is a folded plate roof.

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