JPH07119863B2 - Solar collector - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a solar light collecting device, and more specifically, it focuses sunlight by a lens or the like and introduces it into a light guide body, and transmits it to any desired place through the light guide. The present invention relates to a solar collector that is used for certification and other uses.

Prior Art FIG. 3 is an overall perspective view for explaining an example of a solar light collecting device previously proposed by the present applicant, in which 1 is a cylindrical base portion and 2 is a transparent dome-shaped head. Reference numeral 3 denotes a transparent body connecting portion that connects the base portion and the head portion, and constitutes a capsule 4 for a solar light collecting device by these, and as shown in the capsule 4, the solar light collecting device is shown. Part 10 is housed. The solar collection device unit 10, a large number of sheets for collecting sunlight (e.g., seven, nineteen, ...) lens 11 ₁ to
11 _n and sunlight direction sensor 1 to detect the direction of the sun 1
2, a support frame main body 13 for integrally holding these and fixing the light receiving end of a light guide (not shown) at the focal position of the lens, and a first rotary shaft for rotating the support frame main body 13. 14 and a first motor 15 that rotates the first rotating shaft 14.
And a supporting arm for supporting the lenses 11 _{1 to} 11 _n or the motor 15
16, a second rotating shaft 17 arranged so as to be orthogonal to the first rotating shaft 14, and a second motor (not shown) that rotates the second rotating shaft 17 and the like. Sensor 12
Detecting the direction of the sun by the sunlight focused by the lens 11 ₁ to 11 _n is always controls said first and second motors to face in the direction of the sun lens 11 ₁ to 11 _n by the detection signal The lens is introduced into an optical conductor cable (not shown) whose light receiving end is arranged at the focal position of each lens, transmitted to any desired location through the optical conductor cable, and used for illumination and other uses.

Thus, in the above-mentioned solar light collecting device, the capsule is fixed, only the internal solar light collecting device portion is movable, and since the movable part moves following the movement of the sun, the capsule and the solar light collecting device. The relative positional relationship with the lens of the part changes from moment to moment, but the capsule is not necessarily formed uniformly,
In addition, the incident angle of sunlight on the capsule also changes with the passage of time, and the incident angle on the lens changes when passing through the capsule (it does not enter at a right angle), so sunlight cannot be focused efficiently. It was

In order to solve the above-mentioned problems, the applicant has previously proposed a solar collecting device as shown in FIG. In FIG. 4, reference numeral 20 denotes a housing that integrally houses the solar collector unit 10, and at least the front surface of the housing 20, that is, the lens 11
_The surface facing _{1 to} 11 _n is formed of a transparent body 21, and the housing 20 is configured to rotate around the axes 14 and 17 together with the lenses 11 _{1 to} 11 _n . Therefore, according to this sunlight collecting device, since the sunlight collecting device portion 10 and the housing 20 rotate integrally, the relative relationship between the transparent body 21 and the lenses 11 _{1 to} 11 _n is always the same. If the positional relationship among the transparent body, the lens, and the light receiving end of the light guide is fixed at the best position, it is possible to store the sunlight while maintaining this best relationship.

However, the solar collecting device described above includes the first arm including the support arm 16.
The rotation shaft 14 of the above protrudes to the side of the housing 20, and the outer diameter is increased accordingly. Thus, the effective sunlight collecting area is the total area of the lens, and the other areas are ineffective areas. The sunlight collecting device occupies an area when viewed from the front (side of the lens surface). In particular, when a large number of similar solar collecting devices are arranged, the installation area of the solar collecting device becomes large and it is difficult to secure the spacer.

Purpose The present invention has been made in view of the above-mentioned circumstances,
In particular, it aims to minimize the sunlight receiving area required by a single solar collector.

Configuration FIG. 1 is a rear perspective view of a solar collecting device according to the present invention,
FIG. 2 is a view as seen from the direction II-II in FIG. 1, and in the figure, the parts having the same functions as those of the solar collecting device shown in FIG. 3 and FIG. The same reference numerals as in FIG. 4 are attached. Thus, in the present invention, the housing 20 includes a front cylindrical portion 20a having a relatively large diameter in which a lens and the like are disposed, and a rear cylindrical portion having a relatively small diameter integrated with the front cylindrical portion 20a. 20b, the rotary shaft 14 is connected to the rear cylindrical portion 20b, and the support arm 1
6 is shorter than the outer diameter of the front tubular portion 20a.

The light receiving surface of the front tubular body 20a is covered with a transparent plate 21 which is fixed by fastening means such as bolts, and the front tubular body has an area sufficient to accommodate a large number of light collecting lenses. The front tubular body 20a and, behind the front tubular body 20a, a vertically elongated rear tubular body 20b having a diameter smaller than the diameter of the front tubular body 20a is fixedly coaxially fixed thereto. The first rotating shaft 14 is fixed to the rear cylindrical body 20b, is supported by the rotation transmitting device 15a and the bearing 15b, and is rotated by the first motor 15. Further, the inside of the rear tubular body 20b is configured so as to have the same rotation moment as the front tubular body 20a side with respect to the first rotation shaft 14,
For example, a control command unit 23 that stores a command to control the first and second motors based on the calculation result of the sun position based on the signal of the sunlight direction sensor 12 and the like is stored. When the weight of the control command unit 23 is not enough to make the rotation moment equal, the weight is adjusted by adding a weight. The equal moments not only stabilize the mounting but also improve the responsiveness, and also allow the first motor 15 to rotate with a small torque. Similarly, if the left and right rotational moments of the second rotary shaft 17 are equalized, the response speed of the second rotary shaft can be increased and the drive motor can be downsized.
Since the sunlight has a positional relationship orthogonal to the axial direction of the first rotating shaft 14 and the distance between the bearing 15b and the rotating shaft transmission mechanism 15a is smaller than the outer diameter of the front cylindrical body, The drive means for the first rotary shaft 14 does not receive sunlight. On the contrary, the sunlight effectively irradiates the sunlight collecting unit 10. Therefore, the first rotary shaft 14 is supported, and the motor 15 and the rotation transmission mechanism are supported.
The U-shaped support arm 16 in which 15a and the bearing 15b are arranged and in which the optical conductor is inserted can be made small, and the gears 18a and 18b for transmitting the rotation of the second motor 18 in the tubular base portion 30. Can be housed compactly and can be pivoted about said shaft 17 via a second rotation 17.

Effects As is clear from the above description, according to the sunlight collecting device of the present invention, the sunlight collecting unit 20a can be made to have a size that is large enough to accommodate the lens group, and collects sunlight. The effective area ratio can be maximized, and the rotation moments about the horizontal axis and the vertical axis are equalized, so that the rotation is stable and the driving torque can be reduced, so that a small motor can be obtained.

[Brief description of drawings]

FIG. 1 is a rear perspective view of the solar light collecting device of the present invention, FIG.
FIG. 1 is a front view seen from the direction of the line II-II in FIG. 1, and FIGS. 3 and 4 are perspective external views according to the prior art. 11 …… Lens, 12 …… Sunlight direction sensor, 20 …… Case, 20a
...... Front cylinder, 20b …… Rear cylinder, 21 …… Transparent plate, 14…
... 1st rotating shaft, 15 ... 1st motor, 17 ... 2nd rotating shaft, 18 ... 2nd motor, 23 ... control command part.

Claims (1)

[Claims] 1. A plurality of lenses for focusing sunlight, an optical conductor having a light receiving end disposed at a focal position of each lens, and a lens and a light receiving end of each optical conductor are integrally fixed. And a housing having the transparent body at least in front of the lens, and a first rotation shaft rotatably supporting the housing. A supporting arm for supporting the first rotating shaft and a second supporting arm for rotatably supporting the supporting arm around an axis orthogonal to the first rotating shaft.
And rotating the first rotating shaft and the second rotating shaft so that the light receiving surface of the lens faces the direction of the sun as a whole, and introduces sunlight into the light guide body. In a sunlight collecting device adapted to transmit to an arbitrary desired place through a light guide, the first and second rotating shafts respectively support the solar collecting device so that rotational moments about the same are equal, and The first including the support arm
The solar collecting device, wherein the length of the rotation axis of the device does not exceed the diameter of the housing.