JPH0212331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a dehumidifying device for indoor high-humidity air using natural energy, in particular, a dehumidifying device for indoor high-humidity air that is guided to the back side of a plate-shaped member cooled by outside air and brought into contact therewith. This relates to a dehumidifying device that allows condensation to occur on this surface and then returns it to the room. In rooms where heat and steam are supplied during the day, at night,
When the indoor surface temperature of walls, roofs, etc. decreases as the outside temperature decreases, indoor water vapor condenses on those surfaces, forming dew condensation. To prevent this, insulation layers are provided on walls and roofs to ensure that their surface temperatures do not fall below the dew point temperature of the indoor air, but this is often not done sufficiently, and in such cases supplementary A dehumidifier is used as a means. However, conventional dehumidifiers require a large amount of electric power, such as dehumidifiers that utilize a compression refrigeration cycle. 1
As an example, a dehumidifying capacity of 5/h consumes approximately 4.59KW of power.

The purpose of the present invention is to solve this power consumption problem, and instead of using a refrigerant evaporator that functions as a heat exchanger to condense water vapor in conventional dehumidifiers, it uses heat transfer with low-temperature outside air. A plate-shaped member cooled by long-wave radiation toward the sky is used as the heat exchanger, and high-humidity indoor air is guided to the back side of the plate-shaped member and brought into contact with it, causing dew condensation and dehumidification. This is what we do. If such a device is used, electric power for the compressor is not required, and natural ventilation due to temperature differences is promoted by drawing indoor air, making it possible to significantly reduce power consumption.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to preferred embodiments thereof, which are illustrated in the accompanying drawings.

FIG. 1 shows an embodiment in which the outer wall of a building is constructed as a dehumidifying device according to the present invention, and shows a cross section of the building.

Reference numeral 1 in FIG. 1 is a plate-like member made of a metal plate, an asbestos slate plate, or the like with low heat conduction resistance, and faces directly to the outside air. A wall 2 is provided on the indoor side facing the plate-like member 1, and a gap 3 is formed between the plate-like member 1 and the wall 2 so that air can freely circulate. Since the plate-shaped member 1 is cooled at night by convective heat transfer to the outside air and radiant heat transfer to the sky, the air inside the gap 3 is also cooled, creating a density difference between it and the indoor air, and the wall body 2 It flows into the room through the lower opening 4. On the other hand, indoor air enters the air gap 3 through the upper opening 5.
In this way, natural ventilation of the cavity 3 by indoor air is continuously carried out. Under these circumstances, when the indoor surface temperature of the plate member 1 falls below the dew point temperature of the indoor air, some of the water vapor in the voids 3 condenses on the surface, forming dew condensation. The air flowing down through the gap 3 is dehumidified and returned to the room.

Water condensed on the surface of the plate member 1 drips and flows into the water receiving gutter 6, through which it is discharged.

A blower may be used to increase the amount of air flowing into the cavity 3. Reference numeral 7 in FIG. 1 indicates a blower installed for this purpose, which forces room air into the air gap. In addition, the temperature of the dehumidified air that returns indoors has decreased, but if this causes a problem, the air should be heated indoors after being heated to the required temperature by the heater 8 installed in the lower opening. Sometimes it is returned to. 9 is a heating coil.

An enlarged view of the vicinity of the openings 5 and 4 in FIG. 1 is shown in FIGS. 2A and 2B. As shown in FIG. 2A, a damper 11 is provided in the upper opening 5 of the wall 2, and a damper 10 is provided in the plate-like member 1 at a position facing the damper 11.

Further, as shown in FIG. 2B, a damper 12 is provided at the bottom of the wall 1. If you want to dehumidify, open the damper 11,
12, but in the summer when there is no need to dehumidify to prevent condensation, and when you want to reduce the solar heat load that enters the room through the outer wall, you can close the damper 11 and open the dampers 10 and 12. , can reach its purpose.

In the dehumidifying device shown in FIG. 3, in the embodiment shown on the left side of FIG. This shows an example in which outside air is forced into the outside of a wall 1' corresponding to the wall 1 in FIG. The purpose is to increase the convective heat transfer rate and increase the dehumidification ability.

All of the above examples are examples in which the surface that causes dew condensation is installed on the wall of a building, but it goes without saying that this surface can also be installed on the roof using exactly the same principle. .

The effects of the present invention described above can be summarized as follows in comparison with conventional dehumidification devices.

(i) The structure is simple because there are no moving parts such as a compressor.

(ii) It utilizes natural phenomena and its operation is reliable.

(iii) Operating costs are low.

(iv) It is possible to integrate it with the architecture, and the production cost can be kept low.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view of a building showing the structure of the dehumidification device according to the present invention, the right and left sides are views showing different embodiments, and Fig. 2 A and B are the sections A and B of Fig. 1, respectively. FIG. 3 is a schematic cross-sectional view of a building showing another embodiment of the dehumidifying device of the present invention. 1, 1'... plate-like member with low thermal conduction resistance, 2
...Wall, 3...Gap, 4...Lower opening, 5...
Upper opening, 6... water receiving gutter, 7... blower, 8...
...heater, 9...heating coil, 10, 11, 12
...damper, 14...blower.

Claims (1)

[Scope of Claims] 1. A plate-like member 1 with low heat conduction resistance is arranged substantially parallel to the outside of an outer wall 2 of a building to form a space 3 between it and the outer wall 2. In the dehumidifying device for indoor high humidity air, which introduces indoor high humidity air into the interior of the room, causes dew condensation on the plate-like member, dehumidifies it, and then returns it indoors, A damper 11 is provided in the upper opening 5 that communicates with the outside air, and upper and lower dampers 10 and 12 that communicate with the outside air are provided in the plate-like member 1 at the upper and lower portions of the air space 3. Opening other damper 1
0 and 12 to perform a dehumidification effect, and in summer, etc., the damper 11 with the upper opening is closed and the other dampers 10 and 12 are opened to reduce the solar heat load. Dehumidifier for high humidity air. 2. A dehumidifying device for indoor high-humidity air according to claim 1, characterized in that a device for forcing outside air to convect is disposed on the outer surface of the plate-like member.