JPH0197746A - Discharger for indoor moisture - Google Patents

Abstract

PURPOSE: To prevent the formation of indoor condensation by providing an air-impermeable, moisture-permeable layer on the upper surface of ceiling having air vents, and laying an air-permeable heat insulating material on the upper surface of the moisture-permeable layer. CONSTITUTION: An air-impermeable, moisture-permeable layer made of a moisture-permeable film 3 or the like is provided on the upper surface of ceiling 1 having air vents 2 in the whole or a part of its surface, and an air-permeable heat insulating material 4 is laid on the upper surface of the moisture-permeable layer. Thus, since moisture in a living room 5 migrates toward low-moisture air in attic space 6, the formation of indoor condensation can be prevented, and since no air circulates, heat insulating performance and airtight performance are not impaired.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a device for discharging indoor moisture to the outside, and particularly relates to the structure of the ceiling portion thereof.

Conventional Technology The airtightness of today's houses has been greatly improved, and especially in cold regions, highly insulated and highly airtight structures are being developed. On the other hand, in such cold regions, it is common practice to dry laundry indoors, and therefore indoor condensation has become a major problem as a negative effect of the above-mentioned high insulation and high airtightness.

This problem not only impairs the durability of buildings due to condensation, but also directly and indirectly causes deterioration of the living environment, such as the growth of mold and dust mites in buildings, and the effects on the human body in high humidity environments of 100%. The current situation is that Conventionally,
As a countermeasure to this problem, ventilation fans that provide ventilation (dehumidification) while minimizing energy loss have been devised and have been successful.

Problems to be Solved by the Invention However, the above-mentioned ventilation fans have problems such as initial cost, installation space, noise, and running costs, and they are generally installed only in living rooms, making it difficult to dehumidify the entire room. The reality is that this is not the case.

In view of this situation, the present invention provides an indoor humidity evacuation device that can eliminate indoor condensation by simply changing the structure of the ceiling portion.

Means for Solving the Problems In order to achieve the above object, in this invention, a moisture-permeable film (3) or the like is installed on the upper surface of the ceiling (1), which is provided with a ventilation section (2) on the entire surface or a part of the ceiling (1). It is characterized by providing a non-breathable moisture permeable layer, and further providing a breathable heat insulating layer (4) on the upper surface of the i3 moisture layer.

Effect The humidity inside the living room is higher than the humidity in the attic, and due to the difference in water vapor partial pressure between the two, the humidity on the living room side is
It moves through the damp layer to the back of the shed and drains the moisture inside the living room.

Embodiment In FIG. 1 showing an embodiment of the present invention, (1) is a ceiling plate provided with ventilation by forming a large number of ventilation holes (2) (2)... 1) On top, non-breathable i3
A wet film (3) is laid down.

This non-air permeable film (3) includes, for example,
Examples include the product name Tyvek manufactured by DuPont. Such a moisture-permeable film (3) does not allow air to pass through, but does not allow air to pass through the living room (5).
) side, that is, the lower part of the figure, is higher than the attic (6) side, this water vapor is allowed to pass through.

Further, a breathable heat insulating material (4) such as rock wool or glass wool is laid on the moisture permeable film (3).

Therefore, in the above configuration, the humidity on the living room (5) side is naturally higher than the humidity on the back side of the cabin, and therefore, the respective water vapor partial pressures P!・P2 becomes PI > P2, and due to this difference in water vapor partial pressure, the humidity (water vapor) in the living room moves toward the low-humidity air side of the attic, and as a result, the humidity in the living room (5) moves toward the low-humidity air side of the attic. It is discharged to the back (6) side. At this time, there is no air flow between the attic (6) and the living room (5), and energy loss due to water vapor discharge is
It is only the energy possessed by the emitted water vapor.

The method for disposing of the water vapor discharged to the attic (6) side is arbitrary. For example, as shown in Figure 2, by providing sufficient natural or forced ventilation, the water vapor can be disposed of through the ventilation opening (7) along with this ventilation. There are methods such as discharging it outside. Furthermore, in this embodiment, a ceiling plate (1) with many ventilation holes (2) is used to provide ventilation to the i3 wet film (3) side, but this is not possible using other means. For example, as shown in FIG. 3, the gap between the ceiling panels (1) (1) may be used as a ventilation hole.

Effects of the Invention According to the above configuration of the present invention, moisture is discharged due to the difference in water vapor partial pressure between the living room and the attic, which not only solves the problem of indoor condensation, but also improves insulation since there is no air circulation. It does not impair performance or airtightness, and does not waste energy due to heating, etc.
Because it does not require a power source like those that use ventilation fans,
In addition to requiring no running costs, the structure requires only a moisture-permeable film placed on the top surface of the permeable ceiling and a heat insulating material placed on top of it, so the initial cost for equipment is reduced compared to using the above-mentioned ventilation fan. It is significantly cheaper than the conventional method, and there is no problem of securing installation space. Furthermore, since it is noiseless (equipment costs are low and the structure is simple), it is possible to dehumidify not only one living room but the entire room.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a main part of a ceiling section showing an embodiment of the present invention, Fig. 2 is a schematic longitudinal sectional view of the entire building, and Fig. 3 is a main part of a ceiling section showing another embodiment. FIG. (1)...Ceiling material, (3)...Moisture permeable film,
(4)...insulation material, (5)...living room, (6)...
...Attic. Patent applicant Sekisui House Co., Ltd. Representative Patent Attorney
Hisayuki Tarumoto λJ2 diagram procedure 11tlf correct writing spontaneously) November 1986, zr;

Claims (1)

[Claims] On the upper surface of the ceiling with ventilation holes on the entire surface or part of it,
A device for discharging indoor moisture, comprising: a non-breathable moisture permeable layer made of a moisture permeable film or the like, and further provided with a breathable heat insulating layer on the upper surface of the moisture permeable layer.