JPS608415B2 - Solar heat collection roof device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar heat collection roof device having a structure that collects solar heat as a heating heat source in the winter and reflects sunlight in the summer to prevent an abnormal temperature rise on the roof surface.

'In recent years, utility expenses such as gas, electricity, and oil bills have been increasing in general households. In order to suppress this increase in utility costs, an increasing number of households have recently installed devices that utilize solar heat on their roofs or the like and are using solar heat as a heat source. However, in most conventional solar heat utilization devices, a liquid such as water is used as a heat medium. Such devices are heavy and place a burden on the roof, etc., are expensive, and are troublesome to install and maintain on the roof, especially the installation and maintenance of liquid suction and discharge piping. Furthermore, conventional devices have had various problems such as poor appearance. The present invention was made in view of the above-mentioned circumstances, and includes installing a solar heat collector composed of a combination of a heat-receiving plate and a reflecting plate on the roof surface, and in the winter, the heat-receiving plate sufficiently absorbs solar heat. The purpose of this project is to solve the problems of the conventional method by using a reflector to reflect sunlight during the summer and prevent the temperature of the roof from rising.

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 and 2, for example, there is a second roof between two adjacent straw roofs 2 of a roof 1 of straw grass as shown in FIG.
As shown in the figure, a heat collector 3 with excellent film resistance is arranged.

The heat collector 3 includes a heat receiving plate 4 having a heat receiving surface made of a material having good solar heat absorption properties, such as black felt, and a reflecting plate 5 having a light-weight material having good solar ray reflection properties, such as aluminum foil, for the reflecting plate. It is formed by arranging them alternately in a roughly zigzag shape. Then, the installation angles are selected so that the heat receiving plate 4 is approximately perpendicular to the direction of incidence of sunlight in winter, and the reflection slope 5 is approximately perpendicular to the direction of incidence of sunlight in summer. Install. Both ends of the heat collector 3 are spaced apart from the filler rods 2 and are open. The upper part of the heat collector 3 is covered with a transparent plate material, for example, a transparent plastic plate 6, supported by the upper end of the cover rod 2, and a space containing the heat collector is formed between the cover rods 2, so that it is in contact with the heat collector 3. An air passage 7 is formed to guide outside air, and the passage 7 is suitable for indoor use.

8 is a rafter.

In such a configuration, ``the sun's altitude is lower in winter than in summer.

For example, to explain the winter and summer solstices in Tokyo, if the solar altitude is h, the hour angle is t, and the latitude is 6, then si blood = (sin 6 0 cos cos)
s6) cos t.・--.

The relational expression {1) holds true.

Here, assuming t=oo, =35.6 is,6=
23.50 (for the summer solstice), 6 = -23.5o (for the winter solstice), so from the '1' formula, at the winter solstice, h2300,
At the summer solstice, h: 77.70 800. Therefore, the following description will be made assuming that the solar altitudes in winter and summer are 300 degrees and 80 degrees, respectively.

In the case of such a solar altitude, the heat collector 3 is installed on the roof surface so that the heat receiving plate 4 is inclined at an angle of 60 degrees with respect to the horizontal line, as shown in FIGS. 3 and 4.

In the winter, as shown in FIG. 3, the light from the sun is incident on the heat collecting plate 4 at a substantially right angle, so that the heat receiving plate 4 has good heat receiving efficiency, and the light reflected by the reflecting plate 5 is also reflected on the upper heat receiving plate 4. almost incident on the

Therefore, in winter, solar heat can be sufficiently absorbed by the heat collector 3. This absorbed heat causes roof 1
The air in the air passage 7 surrounded by the plastic plate 6, that is, the air above and below the heat collector 3 in this embodiment, is heated, and this air is forced by a fan or the like or by using natural rise. It can be taken indoors from the top of the roof and used to heat the room. At this time, since the heat collector 3 has a zigzag structure, the flowing air tends to be in a turbulent state, resulting in a high heat exchange efficiency and a large effect. On the other hand, in the summer, as shown in FIG. The reflected light is reflected without almost entering the upper heat receiving plate 4.

Therefore, in the summer, most of the direct sunlight is reflected onto the roof surface, thereby preventing the temperature of the roof 1 from rising. Therefore, the amount of heat radiated indoors from the roof 1 can be reduced compared to the conventional one, making it more comfortable to live in. In this embodiment, the present invention is applied to a roof made of straw-covered bamboo, but it goes without saying that the present invention can also be applied to other roof structures.

Further, the setting angles of the heat receiving plate and the reflecting plate are not limited to those of this embodiment, and may be set at optimal angles depending on the region or direction. As described above, according to the present invention, the indoor space can be heated using solar heat in the winter, and abnormal temperature rises on the roof surface can be prevented in the summer, making the room extremely comfortable to live in, and the utility costs associated with air conditioning and heating can be significantly reduced.

Additionally, compared to conventional solar heat utilization devices, the structure is simpler, easier to install and maintain, and the cost can be lower. Furthermore, since it is lightweight, it not only reduces the burden on the roots, but also has an excellent aesthetic appearance.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing a general straw-covered roof, Fig. 2 is an enlarged view of main parts showing one embodiment of the solar heat collection device according to the present invention, and Fig. 3 is the operation in winter. An explanatory diagram, FIG. 4 shows an explanatory diagram of the action in the case of summer. 1... Roof, 3... Heat collector, 4...
- Heat receiving plate, 5...Reflector plate, 6...Plastic plate, 7...Air passage. Map 1 Figure Old Man Figure 2 Key Figure 3 Old Man Figure

Claims (1)

[Claims] 1 Heat-receiving plates that are installed approximately at right angles to the direction of incidence of solar rays in winter and absorb solar heat, and reflector plates that are installed approximately at right angles to the direction of incidence of solar rays in summer and reflect solar rays, are arranged alternately and in a zigzag pattern. A solar heat collecting roof characterized in that heat collectors arranged in a shape are installed on the roof surface, and air passages for guiding air flow are formed indoors so as to be in contact with the heat collectors. Device.