Peripheral wall structure

Abstract

To provide an outer wall structure for preventing condensation, which ensures heat insulation performance and improves design freedom. [Solution] The outer wall structure comprises an exterior surface material 110 exposed to the outdoor space, an interior surface material 150 exposed to the indoor space, an intermediate surface material 120 provided between the exterior surface material and the interior surface material and forming an air vent between the exterior surface material and the interior surface material, an electric fan 160 provided at the lower end of the interior surface material and drawing air from the indoor space into the air vent layer, and an exhaust port 170 provided at the upper end of the interior surface material and discharging air from the air vent layer to the indoor space.

Description

[Technical Field]

[0001] This specification discloses a technique relating to an outer peripheral wall structure. [Background technology]

[0002] An outer wall structure is a structure that separates an outdoor space from an indoor space in a building. Patent Document 1 describes an outer wall structure that ensures thermal insulation performance between the outdoor space and the indoor space and prevents condensation. The outer wall structure of Patent Document 1 includes, in order from the outdoor space to the indoor space, an exterior facing material, a ventilation layer, a thermal insulating material, and an interior facing material. The ventilation layer of Patent Document 1 moves air within the ventilation layer due to temperature changes within the ventilation layer. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-163179 Summary of the Invention [Problem to be solved by the invention]

[0004] The outer wall structure of Patent Document 1 has a problem in that the configuration from the exterior surface material to the interior surface material is limited, resulting in low design freedom. [Means for solving the problem]

[0005] (A) One embodiment disclosed in this specification is an outer wall structure that separates outdoor and indoor spaces in a building. Forcibly sending air into the ventilation layer with an electric fan promotes the movement of air within the ventilation layer, which tends to stagnate. The air that is forcibly moved, mainly from the bottom of the ventilation layer, may be discharged to the outside through eaves ventilation openings or may be guided into the attic and discharged to the outside through a ridge ventilation structure installed on the roof. Another effective method is to install a temperature and humidity-sensitive ventilation fan in the attic. Another method is to use the space between the roof rafters as a ventilation layer that is continuous with the exterior wall ventilation layer. In either case, installing an electric fan in the exterior wall ventilation layer prevents air stagnation, and the exterior wall ventilation layer itself can be considered part of the insulation. This is because it is thought that as the air moves within the ventilation layer, it removes heat from the exterior wall material. In addition, the ventilation layer, where air is constantly moving, has a low risk of condensation and is thought to contribute to preventing deterioration of the exterior material. Furthermore, if a ventilation layer is installed between the roof rafters and is connected to the exterior wall ventilation layer, it is thought that it will also contribute to melting snow on the roof.

[0006] (B) One embodiment disclosed in this specification is an outer wall structure that separates outdoor and indoor spaces in a building. While a ventilation layer is typically installed on the exterior of the outer wall, many older buildings, such as used homes and concrete structures, do not have a ventilation layer. This proposal addresses this issue by installing a ventilation layer from the interior side of the building in buildings that do not have or where it is difficult to install an exterior wall ventilation layer. A new ventilation layer is installed in the interior wall facing the building's exterior wall. Alternatively, in reinforced concrete structures where the interior finishing base material (such as gypsum board) is fixed with furring strips or GL bond, a space exists between the base material and the structure, and this space can be used as a ventilation layer. An electric fan is installed below the ventilation layer to forcibly send air into the ventilation layer, and an exhaust outlet is installed above the ventilation layer. If there is an attic, a ventilation layer is installed near the exhaust outlet at the top of the wall to guide the exhausted air toward the ceiling. The air guided to the ceiling is guided to the upper floor's ventilation layer by an air vent installed near the wall with the ventilation layer, and then by an electric fan installed at the bottom of the ventilation layer. If there is an attic, it is exhausted to the outside by a temperature- and humidity-sensitive exhaust fan installed in the attic, or through the ridge vent at the top of the roof. By installing an air vent on the inner wall facing the exterior wall and forcing the air within the ventilation layer to move with an electric fan installed at the bottom, the insulating effect of this wall surface can be expected. The moving air also moves moisture, preventing condensation. The circulation effect reduces temperature differences within the room, reducing air conditioner operating time and allowing for more economical use of the set temperature, contributing to energy savings. In addition, installing the air intake near the floor reduces the cold at the feet in winter, which is thought to contribute to the health benefits of keeping the head cool and the feet warm.

[0007] One embodiment disclosed herein is an outer wall structure separating an outdoor space from an indoor space in a building. The outer wall structure includes an exterior facing exposed to the outdoor space, an interior facing exposed to the indoor space, an intermediate facing provided between the exterior facing and the interior facing and forming a ventilation layer between the interior facing and the exterior facing, an electric fan provided at the lower end of the interior facing and drawing air from the indoor space into the ventilation layer, and an exhaust port provided at the upper end of the interior facing and discharging air from the ventilation layer to the indoor space. This outer wall structure allows for a ventilation layer to be formed between the intermediate facing and the interior facing, regardless of the configuration between the exterior facing and the intermediate facing. As a result, the design flexibility of the outer wall structure can be improved to ensure thermal insulation performance and prevent condensation. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing the outer wall structure of a building (A). [Figure 2] This is a cross-sectional view showing the outer wall structure of building (B). [Figure 3] FIG. 10 is a cross-sectional view showing a modified roof insulation structure. DETAILED DESCRIPTION OF THE INVENTION

[0009] Fig. 1 is an explanatory diagram showing a building (A), Fig. 2 is a cross-sectional view showing the outer wall structure of a building (B), and Fig. 3 is a cross-sectional view showing a modified roof insulation structure.

[0010] The building (A) comprises an outer perimeter wall structure (A). The outer perimeter wall structure (A) is a structure that separates the outdoor space from the indoor space in the building. The lower part of the outer perimeter wall structure (A) is connected to a foundation floor 300 on the periphery. The upper part of the outer perimeter wall structure (A) is connected to beams 400. The outer perimeter wall structure (A) comprises an exterior material 110, a wall material 120, a ventilation layer 140, an interior surface material 150, an electric fan 160, and an exhaust port 170. The building (A) may also have a roof insulation structure as shown in FIG. 3.

[0011] The building (B) comprises an outer perimeter wall structure (B). The outer perimeter wall structure (B) is a structure that separates the outdoor space from the indoor space in the building. The lower part of the outer perimeter wall structure (B) is connected to a floor material (foundation) 400 on the periphery. The upper part of the outer perimeter wall structure (B) is connected to a beam material 500. The outer perimeter wall structure (B) comprises an exterior material 110, a wall material 120, a ventilation layer 140, an interior surface material 150, an electric fan 160, and an exhaust port 170.

[0012] The intermediate component 120 of the perimeter wall structure 100 is a member that forms between the exterior facing material 110 and the intermediate facing material 130. The intermediate component 120 may include at least one of a waterproof sheet, structural plywood, a heat insulating material, and a moisture-proof sheet.

[0013] The intermediate surface material 130 of the perimeter wall structure 100 is a member provided between the exterior surface material 110 and the interior surface material 150. The intermediate surface material 130 forms a ventilation layer 140 between itself and the interior surface material 150. In the case of the perimeter wall structure (A), the intermediate surface material 130 forms a ventilation layer 140 between itself and the exterior surface material 110. In the case of the perimeter wall structure (B), the intermediate surface material 130 may be plywood, gypsum board, or the like. When renovating the building 10, the intermediate surface material 130 may be an interior surface material that was exposed to the indoor space 820 before the renovation.

[0014] The ventilation layer 140 of the outer peripheral wall structures (A) and (B) is a flow path that allows air to flow from the electric fan 160 to the exhaust port 170. The ventilation layer 140 provides a heat insulating effect by the air between the outdoor space 810 and the indoor space 820. The ventilation layer 140 prevents condensation from occurring on the intermediate surface material 130 and the interior surface material 150 by allowing air to circulate.

[0015] The interior facing material 150 of the outer wall structure (B) is a board material exposed to the indoor space 820. The interior facing material 150 is fixed to the intermediate facing material 130 via studs 145. The interior facing material 150 may be plywood, gypsum board, or the like. Wallpaper, decorative plywood, paint, coating, or the like may be applied to the surface of the interior facing material 150 facing the indoor space 820.

[0016] The electric fan 160 of the outer peripheral wall structures (A) and (B) is provided at the lower end of the ventilation layer 140. The electric fan 160 of the outer peripheral wall structure (A) is a device that sends air from the outdoor space into the ventilation layer 140. The electric fan 160 of the outer peripheral wall structure (B) is a device that takes air from the indoor space 820 into the ventilation layer 140. The electric fan 160 of both the outer peripheral wall structures (A) and (B) may be equipped with a filter that removes dust from the air drawn into the ventilation layer 140.

[0017] The exhaust port 170 of the outer peripheral wall structure (A) may be exhausted from a ventilation port provided under the eaves. Alternatively, the air may be guided to the attic and exhausted from a ridge ventilation port. Alternatively, the air may be exhausted using a temperature and humidity sensitive ventilation fan in the attic. The exhaust port 170 of the outer peripheral wall structure (B) is provided at the upper end of the interior facing material 150. The exhaust port 170 is a portion that exhausts air from the ventilation layer 140 to the indoor space 820. The exhaust port 170 may have a slit shape to prevent foreign matter from entering the ventilation layer 140.

[0018] According to the peripheral wall structures (A) and (B) described above, it is possible to form a ventilation layer 140 that allows air to flow between the intermediate panel 130 and the interior panel 150, without being limited to the configuration between the exterior panel 110 and the intermediate panel 130. As a result, it is possible to improve the degree of freedom in designing the peripheral wall structure 100 to ensure heat insulation performance and prevent condensation.

[0019] The technology disclosed in this specification is not limited to the above-described embodiments, examples, and modifications, and can be realized in various configurations without departing from the spirit thereof. For example, among the technical features of the above-described embodiments, examples, and modifications, those corresponding to the technical features of each form described in the Summary of the Invention column can be appropriately replaced and combined to solve some or all of the above-described problems or achieve some or all of the above-described effects. Furthermore, technical features not described as essential in this specification can be appropriately deleted. [Explanation of symbols]

[0020] 10…Buildings 100…Outer wall structure 110...Exterior surface material 120...Wall material 120...Intermediate component material 130...Intermediate surface material 140...Ventilation layer 145...Stud 150...Interior surface material 160...Electric fan 170...Exhaust port 300…Foundation floor 400…beam material 500…beam material 810...Outdoor space 820...Indoor space

Claims

[Claim 1] An outer wall structure that separates an outdoor space from an indoor space in a building, an exterior surface material exposed to the outdoor space; an interior surface material exposed to the indoor space; an intermediate surface material provided between the exterior surface material and the interior surface material, forming a ventilation layer between the interior surface material and the intermediate surface material; an electric fan provided at a lower end of the interior surface material and adapted to draw air from the indoor space into the ventilation layer; an exhaust port provided at an upper end of the interior surface material, which exhausts air from the ventilation layer to the indoor space; An outer wall structure comprising:

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