JPH04213689A - Transparent sheet with wavy pattern - Google Patents

Abstract

PURPOSE:To offer a transparent sheet with wavy patterns provided to control the amount of heat by utilizing the natural energy ingeniously through a process of restraining as much as possible, the incoming heat from outside during the summer period while conversely increasing an amount of the incoming heat during the winter period. CONSTITUTION:The abovementioned transparent sheet is formed by making one side 2 flat and the other side 3 with an upward inclined surface and a downward inclined surface formed repeatedly sequentially from the top of the bottom, and also forming a reflection film 4 on the upward inclined surfaces.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transparent sheet having a wavy pattern that allows effective control of heat energy from sunlight in summer and winter.

0002

2. Description of the Related Art It is desirable that the temperature inside a building be as low as possible in the summer, and vice versa in the winter. However, since the sun is generally strong in the summer, much of the heat is supplied from windows, etc.
In winter, on the contrary, there are fewer. Therefore, it is desirable for the window material to be one that blocks sunlight in the summer and allows in sufficient sunlight in the winter.

[0003] Conventionally, some window materials have been designed to minimize heat loss and improve internal thermal efficiency by imparting heat insulating properties to the material. The aim is to reduce the amount of heat flowing in from the outside as much as possible and make it easier to control. In order to provide heat insulation properties, methods of enclosing air or forming a thin metal film on the surface are often used.

0004

[Problems to be Solved by the Invention] However, in the above-mentioned method, window parts are supplied based on fixed considerations regarding heat balance, and no consideration is given to differences in conditions between summer and winter.

[0005] Therefore, the present invention aims at controlling the amount of heat by skillfully utilizing natural energy by suppressing the inflow of heat from the outside as much as possible in the summer and increasing the inflow of heat in the winter. It is an object of the present invention to provide a transparent sheet having a pattern.

[0006]

[Means for Solving the Problems] To achieve this, the present invention provides a structure in which one side is flat, the other side is repeatedly formed with an upwardly inclined surface and a downwardly inclined surface from top to bottom, and a reflective film is provided on the upwardly inclined surface. It is formed and constructed.

[0007]

[Function] In the present invention, the transmission of sunlight through the downwardly inclined surface is less in the summer and more in the winter, so that heat is blocked in the summer and heat is taken in in the winter. Further, at this time, the light rays reflected by the reflective film on the upwardly inclined surface are largely reflected by the upwardly inclined surface in summer, and are reflected less in winter.

[0008]

[Examples] Examples of the present invention will be described below. FIG. 1 is a sectional view of a transparent sheet 1 of one embodiment. This transparent sheet 1 is made of transparent plastic such as acrylic or polycarbonate, or glass, and one side 2 is flat, while the other side 3 is formed in a wavy shape from top to bottom. There is. A reflective film 4 is formed on the wave-shaped diagonally upwardly inclined surface 31, and the downwardly inclined surface 32 has an overhang structure.

By the way, the reflectance of a transparent body exhibits incidence angle dependence as shown in FIG. If the polarization direction of the light is not taken into consideration and the light is left in an unpolarized state, the frontal reflectance of the transparent body (incident angle = 0
) is about 5%, but it can be seen that as the angle of incidence increases, the reflectance increases.

[0010] The sunlight in summer is high and the angle of incidence of the light rays incident on the window is large, but the sunlight in winter is low and the angle of incidence of the rays incident on the window is small. Therefore, the inclination angle of the downwardly inclined surface 32 is set appropriately, and the light rays incident on the upwardly inclined surface 31 are reflected and made to enter the downwardly inclined surface 32.
In summer, the surface reflection on the downwardly inclined surface 32 increases to suppress the transmission of heat rays there, and in winter, on the other hand, the amount of incident light is increased by decreasing the amount of surface reflection.

That is, in the summer, the downward slope 32
On the other hand, in winter, the downward slope is set such that the angle of incidence of the light rays directly incident on the surface is maximized, and the angle of incidence of the light rays reflected by the reflective film 4 of the upward slope 31 and incident on the downward slope 32 is maximized. The upwardly inclined surface 31 and the downwardly directed surface are arranged so that the angle of the light beam incident on the surface 32 is minimized, and the angle of incidence of the light beam reflected by the reflective film 4 of the upwardly inclined surface 31 and incident on the downwardly inclined surface 32 is minimized. The inclination angle of the inclined surface 32 is designed. In this way, in the summer, the amount of light rays that pass through the downwardly inclined surface 32 is minimized, thereby achieving maximum heat shielding, and conversely, in the winter, the amount of light rays that pass through the downwardly inclined surface 32 is minimized. This makes it possible to capture solar energy efficiently.

[0012] An inclined surface 31 that satisfies the above conditions;
The inclination angle of 32 depends on the latitude of the place where the transparent sheet 1 is installed, and it is sufficient if there is an angle θ between the summer elevation angle and the winter elevation angle when the transparent sheet 1 is installed.

[0013] In order to manufacture this transparent sheet 1,
For example, a method in which molten material is poured between twin rollers that are flat on one side and a convex-concave pattern on the other side and formed while cooling, or a mold with a concave-convex pattern similar to that used in the production of patterned glass. There are methods such as pouring molten material into the container and solidifying it. The reflective film 4 on the upwardly inclined surface 31 is formed of metal or the like using a vapor deposition method or a sputtering method, for example, after previously protecting the downwardly inclined surface 32 with an adhesive sheet.
Finally, the adhesive sheet on the downwardly inclined surface 32 is peeled off.

[0014]

[Effect of the invention] As is clear from the above,
If the transparent sheet of the present invention is used as a window material on the south side of a building, it can minimize the penetration of sunlight in the summer and take in a large amount of heat from the sun's rays in the winter, making it ideal for energy-saving greenhouses and gardening. Suitable as a house.

[Brief explanation of the drawing]

[Figure 1] Cross-sectional view of a transparent sheet according to an embodiment of the present invention

[
Figure 2: Diagram showing the characteristics of reflectance versus incident angle of a transparent body

[Explanation of symbols]

1: Transparent sheet, 2: One side, 3: Other side, 31: Side, 32
: Surface, 4: Reflective film

Claims (1)

[Claims] Claim 1: One side is flat, and the other side has upwardly inclined surfaces and downwardly inclined surfaces repeatedly formed from top to bottom,
A transparent sheet having a wavy pattern, characterized in that a reflective film is formed on the upwardly inclined surface.