JPH0436497Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Industrial application field) In recent years, technology to introduce sunlight into the interior or basement of buildings such as buildings and houses has become popular.
This article relates to solar inlet technology that can be applied to such fields.

(Prior art) Various technologies have been announced for concentrating sunlight and introducing it into indoor spaces, basements, etc. using transmission bodies such as optical fibers, but in this case, optical fibers are very expensive, Furthermore, since there is a limit to the amount of light transmitted by an optical fiber, several light guide devices have been proposed that use reflectors as light guide paths.

(Problem to be solved by the invention) In this case, the size of the reflector required to reflect sunlight at a certain angle in a certain direction at the sunlight-collecting part is shown in 4 in Figure 3. As shown, a reflector with a much larger area than the area perpendicular to its angle of incidence is required.

This becomes more noticeable as the reflection angle increases. As a result, the overall weight increases, and the amount of energy consumed for tracking the sun and other tasks increases accordingly.

Furthermore, during installation work, a large installation space must be taken up, and damage is likely to occur during construction.

Furthermore, since it is large, it is not safe against wind pressure, and the protective cover must also be in the shape of a large dome, which is difficult to construct.

Moreover, a large single-piece reflector is very expensive.

(Means for solving the problem) Therefore, instead of using such a large reflector, we used a long and narrow reflector that divided the area of the reflector into several parts, just like a light-blocking blind used for a window.
They are lined up parallel to each other at regular intervals, and then installed at right angles to the sunlight in line with the slope of the south wall of the exterior wall. The outer wall will be able to pivot along a circular rail. The azimuth angle of the outer wall containing the entire device is always oriented completely facing the sun by a light sensor, and the elevation angle of the reflector is also controlled by an elevation sensor. In this way, the sun's reflected light reaches vertically downward.

(Example) Examples are shown in FIGS. 1 and 2.

This is installed on a horizontal surface such as the roof of a building, and is attached to cover the top of the vertical light guide.

In the figure, 1 is a divided elongated reflector, which is connected by a connecting trunk 3 with one end 2 as a fulcrum, and an elevation sensor 7 (internal structure omitted) detects the height of the sun and changes it. The connecting stem is moved back and forth to change the angle of the reflector by one-half the angle.

The elevation sensor 7 is fixed to an outer wall 6 including the entire device and rotates together with the outer wall. The outer wall 6 is always oriented so as to face the sun in a horizontal plane using an azimuth sensor 8 (internal structure omitted). An azimuth angle sensor is also fixed to one end of the outer wall 6, and uses a gear or friction wheel or the like as a medium to rotate the outer wall.

As shown in FIG. 2, the outer wall 6 is assembled on a circular rail 14 attached to the installation surface so as to cover the top of the light guide path 9 with rotating rollers 13 in between.

The outer wall 6 has a certain inclination angle 5 on the south side. This angle is determined by considering the season and time when sunlight is needed most, but is generally between 25 degrees and 35 degrees. The opening 10 of this inclined surface is sealed with transparent glass or the like to prevent wind and rain from entering.

Since it has the above structure, for example, 8 a.m.
If you set it to 6:00 p.m. until 6:00 p.m., if the sun is out, you can always let sunlight into your room.

(Effect of the invention) If a single reflector is used, the height increases as shown in 4 in Figure 3, and a large mirror is required.

This is unstable against wind pressure and requires a large plastic dome as a drip-proof cover, which is extremely disadvantageous in terms of both construction and cost.

However, according to the method of the present invention, the overall height is reduced by approximately half, and the installation is extremely easy, as it can be constructed to cover the top of the light guide provided on the rooftop as shown in Figure 2. be.

Furthermore, the entire structure is cylindrical and has no protrusions, and the opening slanted toward the south is flat, making it easy to cover with glass or the like, and the overall shape is simple and aesthetically pleasing. This means that the amount of reflected light changes somewhat as the altitude of the sun changes. However, the altitude of the sun changes contrastingly in the morning and afternoon, centering on the meridian time, so for example, if you choose the inclination angle 5 and the spacing of the reflectors at an angle that allows the total amount of light to be reflected at 10 a.m., then at 10 a.m. Since the entire amount of light is reflected at 2:00 p.m., this is an extremely effective method for utilizing sunlight, even if the amount of reflected light decreases at other times. Furthermore, there is no part that requires particularly high precision, and it is inexpensive.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an embodiment of the present invention, Figure 2 is a cross-sectional view of an embodiment of the present invention, and Figure 3 shows the case where sunlight is reflected by one large reflector and the divided elongated reflection. This is a diagram comparing cases where multiple vessels are used, and although both can reflect the entire amount of light, their sizes are completely different. 1 is a divided elongated reflector, 2 is a fulcrum, 3 is a connecting trunk, 4 is a reflector when using a single reflector, 5 is an installation angle of a small reflector divided by the inclination angle of the opening Same as above, 6 is the outer wall, 7 is the elevation sensor, 8 is the azimuth sensor, 9 is the light guide, 10 is the shielding glass of the opening, and 14 is the circular rail.

Claims (1)

[Scope of utility model registration request] The outer wall has a cylindrical shape with a low slope on the south side at a certain angle, and has a structure that allows it to freely rotate on a circular rail. They are lined up at regular intervals and have connecting stems that can change their angle freely at the same time, and are placed along the inside of the sloped surface of the outer wall, so that the angle of elevation of the reflector and the orientation of the outer wall including the reflector are fixed. A solar reflector characterized by having a function to constantly track the sun by controlling the angle with a light sensor.