JPH0633520A - Dew condensation preventing device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of dew condensation without lowering of room temperature by forming an air layer on the indoor side of an outer wall for partitioning between the indoor and the outdoor or in the interior of the outer wall, and providing a heating element under the air layer. CONSTITUTION:An outer wall plate 3 and an inner wall plate 4 are fixed to each other through a connecting material 5. A heat insulating layer 6 is fitted to the back of the inner wall plate 4. An interior plate 10 is erected at a fixed space from the outer wall 1, and an air layer 12 is formed between the indoor side surface 11 of the outer wall 1 and the interior plate 10. Further, a heating element 13 is extended in the cross direction of the outer wall 1 under the air layer 12. Thus, the interior of the air layer 12 is heated above the dew-point temperature of the indoor air by the heating element 13, so that the occurrence of dew condensation can be prevented without lowering of room temperature and the durability of a building can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dew condensation preventing device.

[0002]

2. Description of the Related Art When the indoor air temperature is much higher than the outdoor air temperature, dew condensation occurs on the inner surface of the outer wall, the window and the like.
Since this dew corrodes indoor interior plates and floor plates and significantly reduces the durability of living buildings, sufficient measures to prevent dew condensation are required especially in cold regions.

As a countermeasure for this, it is generally adopted to increase the heat resistance by thickening the heat insulating layer of the outer wall partitioning indoors and outdoors, and to use the interior board as a material having excellent hygroscopicity. . Improving indoor and outdoor ventilation is also one of the measures to prevent dew condensation, and recently, a system has been developed that circulates fresh underfloor air from each room to the back of the house to comprehensively ventilate the inside of the building. There is.

[0004]

However, since it is not possible to raise the temperature of the portion where dew condensation is likely to occur to room temperature or above by merely increasing the thickness of the heat insulating layer or adopting the interior material having excellent hygroscopicity, the indoor relative Condensation is highly likely to occur when the humidity exceeds 80%. Further, thickening the existing heat insulating layer or replacing the existing interior plate requires a great amount of construction cost, and thus such means can be practically used only in a newly built building.

On the other hand, if the indoor and outdoor ventilation is performed too often, the room temperature is lowered, which is not preferable especially in the cold district, and the comprehensive ventilation system inside the building cannot be constructed unless it is newly built. The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to reliably prevent the occurrence of dew condensation by simple construction without causing a decrease in indoor temperature.

[0006]

[Means for Solving the Problems] In order to achieve the above object,
The present invention has taken the following technical means. That is, according to the present invention, the air layer 12,18 having a constant thickness is formed on the indoor side of the outer wall 1 that partitions the interior and exterior or inside the outer wall 1, and the air layer 12,18 is formed below the air layer 12,18. A heating element (13) for heating the inside to a temperature above the dew point of indoor air is provided.

[0007]

The heating element 13 provided below the air layers 12 and 18 heats the inside of the air layers 12 and 18 to a temperature above the dew point of indoor air. This heated air rises in the air layers 12 and 18, and the interior plate 10
The temperature of the (inner wall plate 4) itself is raised, which prevents dew condensation on the surface of the interior plate 10 (inner wall plate 4).

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a first embodiment of the present invention. In the figure, reference numeral 1 denotes an outer wall that partitions the inside and the outside of a room 2 of a building. The outer wall plate 3 on the outdoor side and the inner wall plate 4 on the indoor side are fixed to each other via a lateral connecting member 5, and A heat insulating layer 6 made of glass wool or the like is provided on the back surface of the plate 4. The outer wall 1 is erected on a base 8 fixed to the upper surface of the cloth foundation 7, and a floorboard 9 is laid on the upper surface of the base 8.

On the indoor side of the outer wall 1, an interior plate made of gypsum board or the like at a position spaced apart from the outer wall 1 by a constant distance.
10 are erected, which allows the interior side 11 of the outer wall 1 to
An air layer 12 having a constant thickness is formed between the inner plate 10 and the interior plate 10. In the lower part of the air layer 12, a long heating element 13 is extended in the width direction of the outer wall 1, and this heating element 13 is fixed to the back surface side of the lower end of the interior plate 10 in this embodiment. .

The heating element 13 is a so-called planar heating element having a rectangular cross section, which generates heat when energized and heats the air in the air layer 12 and the interior plate 10 to a temperature above the dew point of the air in the room 2. It is for doing. As the planar heating element 13, a non-combustible long plate-shaped matrix in which a heating wire such as a nichrome wire is embedded in the matrix so as to have a wavy shape in the width direction, or It is possible to employ a resin in which conductive particles such as carbon are dispersed and embedded in a molecular resin.

In the case of the latter heating element 13, that is, the carbon-dispersed polymer heating element, the electric resistance increases as the internal temperature rises, which has a self-temperature control function, and when an excessive current flows, the resin matrix is formed. Since it has a property of melting and breaking, it does not cause a fire and is more advantageous in terms of safety. Incidentally, 14 is an electric cord for energizing the heating element 13. The electric cord 14 has one end connected to the heating element 13 and the other end connected to a power distribution plate (not shown) having a changeover switch. The set temperature of 13 can be switched.

According to this embodiment having the above structure, the interior plate
A heating element 13 that generates heat by energizing is provided in the air layer 12 of 10 and the heating element 13 heats the air in the air layer 12 to a temperature above the dew point temperature of the air in the room 2. It can be prevented from occurring and it is not necessary to ventilate room 2 at this time. Further, since the interior plate 10 is further provided on the indoor side of the outer wall 1 and the heating element 13 is provided in the air layer 12 formed by this, the advantage that the existing outer wall 1 can be easily installed There is.

FIG. 2 shows a second embodiment of the present invention.
In the present embodiment, as shown by the phantom line in the figure, the panel unit 15 having the heating element 13 therein beforehand is attached to the inner side surface 11
The dew condensation prevention device is configured by being attached to the other side, and other points are almost the same as the first embodiment. The panel unit 15 is formed by fixing the interior plate 10 to the opening side of a back plate 17 having a flange portion 16 on the peripheral edge, and has the heating element 13 in the lower part of the air layer 12 formed inside. The back plate 17 is made of a resin having a high heat insulating property such as polystyrene.

According to this embodiment, the panel unit 15
Since the dew condensation preventing device can be configured only by attaching the outer wall 1 to the outer wall 1, it is possible to further reduce the time and labor required to construct the existing outer wall 1. Next, FIG. 3 shows a third embodiment of the present invention. In this embodiment, the dew condensation preventing device is constructed by incorporating the heating element 13 inside the outer wall 1.

That is, the outer wall 1 according to the present embodiment is constructed by laminating the outer wall plate 3, the heat insulating layer 6 and the inner wall plate 4 from the outdoor side, and the heat insulating layer 6 is arranged apart from the inner wall plate 4. Thus, the air layer 18 having a constant thickness is provided inside the cross section. A heating element 13 similar to that of the first and second embodiments is extended below the air layer 18, and the heating element 13 is attached to the back surface side of the lower end portion of the inner wall plate 4.

In the present embodiment as well, it is of course possible to prevent dew condensation on the indoor side surface 11 of the outer wall 1 by heating the air in the air layer 18 to a temperature above the dew point temperature of the indoor air. Is.

[0017]

According to the present invention, the heating element 13 provided in the air layers 12 and 18 heats the air in the air layers 12 and 18 to a temperature above the dew point temperature of the indoor air. It is possible to reliably prevent the occurrence of dew condensation without lowering the
The durability of the building can be further improved.

Further, when the air layer 12 is formed on the indoor side of the outer wall 1, it is possible to prevent the occurrence of dew condensation on the existing outer wall 1 by a simple construction.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a dew condensation preventing device according to a first embodiment.

FIG. 2 is a vertical sectional view of a dew condensation preventing device according to a second embodiment.

FIG. 3 is a perspective view of a dew condensation preventing device according to a third embodiment.

[Explanation of symbols]

 1 outer wall 3 outer wall board 4 inner wall board 6 heat insulation layer 10 interior board 11 indoor side surface 12 air layer 13 heating element 18 air layer

Claims (1)

[Claims] 1. An air layer (12) (18) having a constant thickness is formed on the indoor side of the outer wall (1) for partitioning indoors and outdoors or inside the outer wall (1), and the air layer (12) (18) is formed. A dew condensation preventing device characterized in that a heating element (13) for heating the inside of the air layers (12) and (18) to a dew point temperature of indoor air or higher is provided in a lower portion.