JPS62148757A - 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 FIG. 3, a glass plate 4 was placed on the roof of a sunroom, a greenhouse, etc., and a heat insulating material 5 was removably disposed on the lower surface of the glass plate 4. In the summer, a heat insulating material 5 is attached to the lower surface of the glass plate 4 to prevent sunlight from entering the room 6, and in the winter, the heat insulating material 5 is removed to allow sufficient light to enter the room 6. However, even though the heat insulating material 5 is provided on the lower surface of the glass plate 4 in summer, solar radiation affects the glass plate 4 by approximately 100%.
There was a problem in that the heat insulating material 5 was heated by the radiant heat, and the temperature of the insulating material 5 rose due to radiant heat, weakening the heat insulating performance of the insulating material 5.

[Purpose of the invention]

The present invention was made in view of the above-mentioned technical background, and its purpose is to effectively demonstrate the insulation performance of the heat insulating material in the summer, and to allow sufficient light to enter the room in the winter. The goal is to make it possible.

[Disclosure of the invention]

The daylighting roof of the present invention has a heat insulating material that can be detachably attached to the lower surface of a transparent prism panel 2 that is composed of a large number of right-angled prisms 1 that have the function of reflecting incident light from the incident direction of sunlight in the summer back to its original direction. 5, the roof surface 3 is formed. In the summer, the attached heat insulating material 5 prevents sunlight and hot air from entering the room, and the sun's rays are reflected by the rectangular prism 1 to prevent the temperature of the insulating material 5 from rising, and in the winter, By removing the heat insulating material 5 and changing the altitude of the sun, sunlight can be sufficiently introduced into the room 6 through the prism panel 2. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The prism panel 2 is made of glass with a high refractive index or transparent synthetic resin, and a large number of right-angle prisms 1 are provided on the indoor side surface of the prism panel 2. The right angle prism 1 may be a linear one with a right isosceles triangle cross section, or a cubic prism shaped like the top of a cube (pyramid shape), but as shown in FIG. The directions of the prisms are aligned so that the light rays in the direction perpendicular to the upper surface of the prism panel 2 are totally reflected and reflected back to the original direction. 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, and the solar radiation angle β on the winter solstice is approximately 30 degrees.
．． It becomes 56 degrees. Therefore, when constructing the roof surface 3 of the sunroom 7 with the prism panel 2 as shown in FIG. 1, the south side of the prism panel 2 is lowered to create a slight slope γ#(
Gives 90-77,5) degrees = 12.5 degrees. 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. Further, a heat insulating material 5 can be detachably attached to the lower surface of the prism panel 2, and the heat insulating material 5 can be attached in the summer and removed in the winter. . However, in the summer, the heat insulating material 5 is used to insulate the indoor and outdoor areas, so that the hot air from the outdoors is not transmitted indoors.Moreover, the sun's altitude is high, and the light rays are directed to the prism panel 2 on the roof surface 3.
Since it is incident almost perpendicularly to the ray, it is totally reflected and reflected in the original direction as shown by the solid line A in Fig. 2, and the radiant heat of the sun does not reach the insulation material 5, causing a rise in the temperature of the insulation material 5. Since this can be prevented, the deterioration of the heat insulating properties of the heat insulating material 5 can be prevented, and the insulation between indoors and outdoors can be effectively achieved. On the other hand, in the winter, the heat insulating material 5 is removed and the altitude of the sun is lower, so the sunlight is not totally reflected by the right angle prism 1 as shown by the broken line C in FIG. Transmit to. 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 storage material 9, and even after sunset. It is possible to keep the room 6 warm.

【Effect of the invention】

Since the present invention is accomplished as described above, by installing a heat insulating material in the summer, it is possible to insulate the room between the indoors and the outdoors, keeping the indoors cool, and it is possible to keep the sun's rays at right angles. It is possible to reflect it with a prism and prevent it from reaching the insulation material.
This has the advantage that it is possible to prevent the temperature of the heat insulating material from rising and thereby prevent the heat insulating properties of the heat insulating material from deteriorating. Also, if you remove the insulation in the winter, the altitude of the sun will change from that in the summer, and the direction of the sun's rays will deviate from the direction of total reflection at the right-angle prism.
It has the effect of allowing sunlight to enter the room through the prism panel and warming the room with sunlight.

[Brief explanation of drawings]

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) By installing a removable heat insulating material on the lower surface of a transparent prism panel made up of a large number of right-angled prisms that has the effect of reflecting incident light from the incident direction of sunlight in the summer back to its original direction. A daylighting roof that forms the roof surface.