JP2594276Y2 - Humidity control outer wall structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a humidity control outer wall structure.

[0002]

2. Description of the Related Art Conventionally, as a vented outer wall structure for heat insulation and dew-proofing in a severely cold winter area, for example, an area mainly in Hokkaido, as shown in FIG. 4, an outer wall of an inner wall material 1 made of plywood, gypsum board or the like is used. A heat insulating layer 3 such as a foamed resin plate or glass wool is provided through a moistureproof layer 2 that does not transmit moisture from the outside but transmits moisture from the inside, and a waterproof base material 4A is provided on an outer surface of the heat insulating layer 3. Further, a vented outer wall structure is known in which an outer wall material 5 made of a fiber reinforced cement plate or the like is coated on the outer surface of the waterproof base material 4A via a vent space 4 extending from the base of the building to the eaves portion. . When the outdoor air temperature is lower than the indoor temperature, the ventilated outer wall structure insulates the indoor air temperature with the heat insulating layer 3 provided on the outer surface of the inner wall material 1 and also provides a moisture-proof layer provided between the heat insulating layer 3 and the inner wall material 1. 2 and the heat insulating layer 3 prevent the water vapor in the room from permeating to the outside by the waterproof base material 4A provided on the outer surface. To dry the inner surface of the outer wall to prevent dew condensation.

[0003]

2. Description of the Related Art The above-described vented outer wall structure has been applied to other regions other than Hokkaido, taking into account the respective temperature conditions, in accordance with the above. However, in regions where the outside air atmosphere is hot and humid in summer, indoor An unexpected problem occurred due to cooling and the like. In other words, there was almost no problem in Hokkaido, where there is no summer rainy season and the summer is not so hot and humid. The relationship between temperature and humidity inside is completely opposite to that in winter, and a problem has arisen in that the ventilation-type outer wall structure for heat insulation and dew-proofing of the winter type causes a large amount of dew condensation on the inner and outer surfaces of the inner wall material 1 in summer. .

[0004]

[Problems to be solved by the present invention] In view of the above problems, this invention is a humidity control system that can provide insulation and protection against heat and moisture on the inner wall of the outer wall in winter, and heat and moisture on the inner and outer surfaces of the inner wall in summer. The purpose of the present invention is to provide an outer wall structure.

[0005]

That is, in the humidity control outer wall structure of the present invention, the heat insulating layer 3 is provided on the outer surface of the inner wall material 1 via the moistureproof layer 2.
In the humidity-controlling outer wall structure in which the outer wall material 5 is provided on the outer surface of the heat insulating layer 3 via the space 4, the moisture-proof resistance of the moisture-proof layer 2 provided on the outer surface of the inner wall material 1 is 210 m ² hmmHg / g or more. ,
A waterproof base material 6 having a moisture permeation resistance of 1.0 m ² hmmHg / g or less is provided on the inner surface of the outer wall material 5, and a moisture permeation resistance of the outer wall material 5 is 1.5 m ² hmmHg / g or less. 250g of 5A moisture permeability
/ m ³ · 24h that formed by the above is characterized in.

[0006]

According to the humidity-controlling outer wall structure of the present invention, the moisture-proof resistance of the moisture-proof layer 2 provided on the outer surface of the inner wall material 1 is 210 m ² hmmHg / g or more as compared with the conventional humidity-controlling outer wall structure. The moisture-proof resistance prevents the water vapor on the outer surface of the inner wall material 1 from penetrating into the inner wall material, and also has a function of appropriately blocking the permeation of the water vapor on the indoor side from the outside, thereby preventing dew condensation on the outer surface of the inner wall material 1.
If the moisture permeation resistance is lower than 210 m ² hmmHg / g, the dew water permeates outside the inner wall material 1 and cannot prevent dew condensation on the outer surface of the inner wall material 1.

The heat insulating layer 3 and the space 4 are the same as the conventional ventilation outer wall structure, but the inner wall of the outer wall material 5 has a moisture permeability resistance of 1.0 m ² hmm.
A waterproof base material 6 of Hg / g or less is provided. The waterproof base material 6 allows water vapor to pass through but does not allow water from the outside to pass therethrough.
The water vapor inside is positively released to the outside. If the above moisture permeability resistance is larger than 1.0 m ² hmmHg / g, the water vapor in the ventilation space 4 cannot be sufficiently diffused.

The outer wall material 5 has a moisture permeability resistance of 1.5 m ² h.
mmHg / g or less, moisture permeability of the outer surface coating 5A is a 250g / m ³ · 24h or more. The reason is that the water vapor released from the ventilation space 4 is easily included in the outer wall material 5, and a function of temporarily absorbing the water vapor to prevent dew condensation is provided. The moisture permeability of the outer surface coating 5A to a 250g / m ³ · 24h or more,
Steam impregnated outside from the interior and prevents the direct penetration of water, such as rain drops be for causing released over time to the outside, the outer wall member 5 inside the steam stripping is lower than 250g / m ³ · 24h However, water permeation from the outside cannot be sufficiently prevented, and dew condensation inside the humidity control outer wall structure cannot be sufficiently prevented.

The moisture-proof resistance of the moisture-proof layer 2 and the waterproof base material 6
In addition, due to the synergy of the moisture permeability of the outer wall material 5 and the outer coating film 5A, dew condensation in the humidity-control outer wall in a high-temperature and high-humidity atmosphere in summer is effectively prevented. In winter, since the heat insulating layer 3 and the moisture-proof layer 2 are present on the indoor side with the ventilation space 4 interposed therebetween, the heat-insulating and dew-proofing effect is exhibited as in the related art.

[0010]

Next, an embodiment of the present invention will be described. FIG. 1 is a sectional view of an embodiment of the present invention.

(Example) The outer surface of an inner wall material 1 made of plywood and having a thickness of 10 mm has a moisture-proof resistance of 210 m ² h.
A 50 mm thick heat insulating layer 3 made of a foamed synthetic resin is provided via a moistureproof layer 2 of mmHg / g.
A waterproof base material 6 made of a breathable waterproof material having a moisture permeability of 0.8 m ² hmmHg / g is provided, and a moisture permeability resistance of 1.5 m ² hmmHg / g is provided on the outer surface thereof.
In the following, the outer wall material 5 made of a fiber reinforced cement board having a moisture permeability of 250 g / m ³ · 24 h of the outer coating film 5A was fixed to form a humidity control outer wall structure. The water absorption of the outer wall material 5 was as shown in FIG. 2, and the water content was as shown in FIG.

(Comparative Example) Moisture resistance is 150 m ² h on the outer surface of the inner wall material 1 made of plywood and having a thickness of 10 mm.
A heat insulating layer 3 made of a foamed synthetic resin similar to that of the embodiment is provided via a moistureproof layer 2 of mmHg / g.
A was attached, and an outer wall material 5 composed of a fiber reinforced cement board was fixed to the outer surface of the outer wall material through a space 4 having a thickness of 50 mm as in the example, to form a vented outer wall structure.

In the case of the embodiment and the comparative example, as the test condition 1, when the outside temperature of the wall is -10.degree. C. and the inside temperature is 25.degree. C., as the test condition 2, the outside temperature is 30.degree.
Irradiate the outer surface with an infrared lamp so that the temperature inside the room becomes 25 ° C. Spray water on the inside and outside of the room at the start of the test in both test conditions 1 and 2.
Spraying was performed at 100 cc / 1 m ² , and after one hour, the state of dew condensation in the wall was observed. As a result, in the case of the test example, no condensation was formed inside the humidity control outer wall in any of the test conditions 1 and 2, but in the case of the comparative example, the test condition 2 was not applied.
In this case, it was observed that dew was formed on the inside of the humidity control outer wall and on the surface of the inner wall material 1.

[0014]

As described above, according to the humidity control outer wall structure of the present invention, the temperature difference between the inside and outside is not only when the outside temperature is low but also when the outside temperature is high. No dew condensation occurs, and even in a high-temperature and high-humidity environment, it is possible to perform adiabatic and dew-proofing in a dry and favorable state.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a graph showing the relationship between the water absorption of the outer wall material and the number of days elapsed in the example.

FIG. 3 is a graph showing the relationship between the water content of the outer wall material and the number of days elapsed in the example.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inner wall material 2 ... Moisture-proof layer 3 ... Heat insulation layer 4 ... Ventilation space 5 ... Outer wall material 5A ... Outer coating film 6 ... Waterproof base material

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI E04B 1/80 E04B 1/80 S 2/56 2/56

Claims (1)

(57) [Scope of request for utility model registration] A heat insulating layer is provided on the outer surface of an inner wall material via a moisture-proof layer, and an outer wall material is provided on the outer surface of the heat insulating layer via a space.
The moisture-proof resistance of the moisture-proof layer 2 provided on the outer surface of the inner wall material 1 is 210 m ² hmmHg / g or more, and the moisture-permeable resistance is 1.0 m ² hmmHg / g on the inner surface of the outer wall material 5. The following waterproof base material 6 is provided, the moisture permeability of the outer wall material 5 is 1.5 m ² hmmHg / g or less, and the moisture permeability of the outer coating film 5A is
Humidity the outer wall structure, characterized in that formed by a 250g / m ³ · 24h or more.