JPH0314647Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a sunlight tracking device that uses a reflecting mirror to introduce sunlight into a windowless room or basement of a general residence.

[Background technology]

Conventional solar tracking devices of this type include those that track the sun by directly driving a reflecting mirror rotatably in the vertical and horizontal directions. but,
In the sunlight tracking device described above, the angle of incidence of the sunlight reflected by the reflector changes depending on the position of the sun, so it is difficult to pass sunlight through ducts etc. and enter the basement. The drawback is that it is difficult to reflect the light on a mirror or the like and use it for multiple purposes because the location of the irradiation varies depending on the position of the sun.

Therefore, the angle of the reflecting surface of the reflecting mirror is changed according to the elevation angle of the sun so that the sunlight enters the duct perpendicularly, and the direction of the reflecting surface of the reflecting mirror is adjusted to the direction of the sun by moving around the duct. A sunlight tracking device has been proposed that includes a movement control device and allows sunlight to efficiently enter a duct at a certain angle.

However, even this solar tracking device had the following problems. In other words, since the area of the reflecting surface of this type of reflector is constant, there is a problem that when the elevation angle of the sun changes, the irradiation area of the reflected light of the reflector that enters the duct changes accordingly. Ta. The change in the irradiation area will be further detailed in the Examples section.

[Purpose of invention]

This invention was developed in view of the above-mentioned problems, and its purpose is to allow sunlight to enter the duct efficiently at a certain angle, and to reduce the irradiation area of the reflected light from the reflector. The purpose of the present invention is to provide a solar tracking device that can be used at a constant rate.

[Disclosure of invention]

FIG. 1 is a diagram showing an embodiment of the present invention. The duct 1 is inserted into a windowless room or basement, and has a cylindrical shape. A rail 4 is installed around this duct 1, and a movement control device 3 runs on this rail 4.
moves. A substantially doglegged arm 5 with a reflecting mirror 2 attached to its tip is protruded from the top of the movement control device 3 so that the bottom surface of the flat reflecting mirror 2 is always located above the opening 1a of the duct 1. It supports the reflecting mirror 2. Further, a pulse motor 6 is disposed at the top of the movement control device 3, and the pulse motor 6 and the arm 5 are connected with a gear to drive the arm 5 back and forth to take in sunlight vertically into the duct 1. It is something. A control circuit for the arm 5 and wheels of the movement control device 3 will be explained with reference to FIG. 2. In this control circuit, a memory circuit 7 and an arithmetic circuit 8 are connected, and the arithmetic circuit 8 is connected to an arm drive circuit 9 and a motor drive circuit 10, respectively.A pulse motor 6 is connected to the arm drive circuit 9, and a motor drive circuit 8 is connected to the arm drive circuit 9. A pulse motor 12 is connected to the circuit 10. The operation of this control circuit is as follows. The storage circuit 7 stores in advance the angle data of the position of the sun for each season and each time, and the arithmetic circuit 8 controls the arm drive circuit 9 and the motor drive circuit 10 using the data in the storage circuit 7. The arm drive circuit 9 drives the pulse motor 6 in forward and reverse directions, transmits the rotation of the pulse motor 6 to the arm 5 through a gear, and the motor drive circuit 10 drives the pulse motor 12 to rotate.
The rotation of this pulse motor 12 is transmitted to the wheels.

In this way, in the sunlight tracking device, the movement control device 3 changes the angle of the reflecting surface of the reflecting mirror 2 according to the elevation angle of the sun, so that the sunlight enters the duct 1 perpendicularly and the surroundings of the duct 1 are changed. Since the reflecting surface of the reflecting mirror 2 is moved to match the direction of the sun, sunlight can be taken vertically and efficiently into the duct 1.

By the way, in the sunlight tracking device of this embodiment, the reflecting mirror 2 is composed of a plurality of mirrors that can be slid in the vertical direction and overlapped with each other. The reason for doing this will be explained below with reference to FIGS. 3 to 6. First, as shown in FIG. 5, in the case of one lens, the angle formed by the reflecting mirror 2 and the reflected light is 90 - θ/2 degrees, assuming that the elevation angle of the sun is θ. Here, the dashed line indicates sunlight. Therefore, if the length of the reflecting mirror 2 in the vertical direction is L and the reflecting surface is a rectangle, the reflected light area S
is S=KLsin(90−θ/2), and the irradiation area changes as the sun's elevation angle θ changes. Here, K is the length of the reflecting mirror in the lateral direction. Here, FIG. 6 shows the case where the elevation angle θ is 0.

Therefore, as shown in Figs. 3 and 4, if two reflectors 2 are used and the length L of the reflector 2 is varied by sliding both reflectors 2 according to the elevation angle θ of the sun, the reflected light The area can be kept constant. Therefore, more effective sunlight can be brought into general houses, basements, hotels, hospitals, etc. In addition, as mentioned above, the mechanism for varying the area of the reflecting surface of the reflecting mirror 2 according to the elevation angle of the sun and keeping the irradiation area of the reflected light from the reflecting mirror 2 into the duct 1 constant will be explained in detail. However, it can be easily realized by substantially the same method as the above-described method of driving the arm 5 and wheels.

[Effect of idea]

As mentioned above, the present invention includes a reflector that is positioned above the opening of the duct as a sunlight intake and reflects sunlight, and a reflector that changes the angle of the reflective surface of this reflector according to the elevation angle of the sun. It is composed of a movement control device that allows light to enter the duct perpendicularly and moves around the duct to align the direction of the reflective surface of the reflector with the sun's azimuth. It has the advantage of allowing sunlight to enter the duct vertically and efficiently by adjusting the angle according to the sun.In addition, the above-mentioned reflecting mirror is composed of multiple pieces that can be overlapped by sliding them in the vertical direction, so that sunlight can be directed vertically and efficiently into the duct. It is equipped with an irradiation area adjustment means that changes the area of the reflective surface of the reflector according to the elevation angle to keep the irradiation area of the reflected light from the reflector into the duct constant, so it can be adjusted to reflect changes in the sun's elevation angle throughout the day. Even if the elevation angle of the sun changes throughout the year, the reflected light from the reflector can always enter the duct with a constant irradiation area, preventing the amount of incident light from increasing or decreasing significantly as the elevation angle changes. Furthermore, in the past, it was necessary to make the area of the reflective surface of the reflector larger than necessary in order to prevent the above-mentioned large increase or decrease in the amount of incident light. By making it variable, the area can be reduced to the necessary minimum size, which has the advantage of reducing the effects of wind and the like.

[Brief explanation of the drawing]

FIG. 1 is an external perspective view of an embodiment of the present invention, FIG. 2 is a schematic circuit diagram of the main parts of the same, and FIGS.
The figure is an explanatory diagram of the same operation as above. 1 is a duct, 2 is a reflector, 3 is a movement control device,
5 is an arm.

Claims (1)

[Scope of utility model registration request] A reflector is positioned above the opening of the duct as a sunlight intake and reflects sunlight, and the angle of the reflecting surface of this reflector is changed according to the elevation angle of the sun to direct sunlight vertically into the duct. It consists of a movement control device that allows the light to enter the sun and moves around the duct to align the direction of the reflecting surface of the reflecting mirror with the direction of the sun.
The above-mentioned reflector is composed of multiple pieces that can be slid in the vertical direction and overlapped, and the area of the reflective surface of the reflector is varied according to the elevation angle of the sun, so that the irradiation area of the reflected light from the reflector into the duct is constant. A sunlight tracking device comprising means for adjusting an irradiation area.