JPS6263739A - Lighting roof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

【Technical field】. TECHNICAL FIELD The present invention relates to a lighting roof for a sunroom, a greenhouse, etc.

[Background technology]

Conventionally, as shown in Figure 3, a long board 4 is placed on the roof of a sunroom, greenhouse, etc., and the outer surface of the plastic board 4 is covered with a shutter 5 that can be opened freely. Ta. In the summer, the shutter 5 is closed to allow sunlight to enter the room 6 and provide sufficient light to the room 6. However, even though the roof of a sunroom is located at a high position, it is impossible to manually open and close the shutter 5 located at such a high position. Shutter 5 could be controlled remotely. For this reason, conventional daylight roofs have had the problem of requiring too much equipment. Also, do not repeatedly open and close the shutter 5 during the change of seasons.
It was a hassle.

[Objective of the Invention 1] The present invention was made in view of the technical background described above, and its purpose is to focus on the fact that the altitude of the sun changes between winter and summer. The purpose is to naturally adjust the amount of sunlight that enters the room from the roof during the winter. DISCLOSURE OF THE INVENTION The daylighting roof of the present invention is characterized by forming a large number of right-angled curved surfaces 3 that have the function of reflecting incident light in a certain direction back to the original direction. When constructing the prism panel 2, the direction of the light that can be reflected by the right-angle prism 1 is directed toward the direction of the sun's rays in summer. There is a device that can prevent sunlight from entering the room 6, and also allow sunlight to enter the room 6 through the prism panel 2 as the altitude of the sun changes in winter. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. . The prism panel 2 is formed of glass with a high refractive index or transparent synthetic resin, and a large number of right angle prisms 1 are provided on the interior side of the prism panel 2. This right-angle prism 1 may be a linear prism with a right isosceles triangle cross section, or may be a cubic prism shaped like the top of an upright I-shaped body (pyramid shape).
As shown in the figure, each right-angle prism is connected to the prism panel 2.
A ray of light perpendicular to the top surface of ? The direction of the sun is aligned so that it is totally reflected and reflected back in the original direction.6 By the way, the altitude of the sun varies throughout the year, and the solar radiation angle α on the summer solstice is approximately 77.5 degrees, while the solar radiation angle α on the winter solstice is approximately 77.5 degrees. β is about 30
．． It becomes 56 degrees. Therefore, as shown in FIG. 1, when forming the roof surface 3 of the sunroom 7 with the Mubanel 2 in the L direction, the south side of the prism panel 2 is
#(90-77°5) degrees=12.5 degrees are given. In addition, when the right-angle prism 1 is linear, the direction in which the right-angle prism 1 extends is oriented in the east-west direction. However, in the summer, the sun's altitude is high, and the rays of light are
Since it is incident on the prism panel 2 almost perpendicularly to the IH, the second
As shown by the solid line A in the figure, the light is totally reflected and reflected in the original direction, and does not enter the room 6. On the other hand, in winter, the sun's altitude is lower, so the sun's rays are reflected by the dotted line CI in Figure 2.
Like the light ray shown in 'c', it is transmitted into the room 6 without being totally reflected by the right angle prism 1. In addition, a heat storage material 9 is laid on at least the surface of the floor 8 of the sunroom 7 through which sunlight shines, and the light rays that enter the room 6 through the prism panel 2 are absorbed by the heat rays 9 and absorbed by the sunlight. It can keep the room warm even after death.

【Effect of the invention】

Since the present invention is constructed as described above, by directing the direction of the rays of light that can be reflected by the right-angle prism toward the direction of the sun's rays in the summer, the sun's rays can be reflected by the right-angle prism in the summer. It has the advantage of being able to prevent light from entering the room, preventing glare from glossy light on a daylight roof, and preventing heat from sunlight. Additionally, in winter, when the altitude of the sun changes, the direction of the sunlight deviates from the direction of total reflection at the right-angle prism, allowing it to pass through the prism panel into the room, which has the effect of warming the room with sunlight.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view showing the action of the same prism panel, and FIG. 3 is a schematic sectional view of a conventional example. is the prism panel, and 3 is the roof surface.

Claims (1)

[Claims] (1) A daylighting roof whose roof surface is formed by a prism panel made up of a large number of right-angled prisms that have the function of reflecting incident light in a certain direction back to its original direction.