JPH06265218A - Optical energy light collecting device - Google Patents

Abstract

PURPOSE:To provide a less expensive optical energy light collector in which parallel light beams such as solar beams are collected at a light receiving surface having a specified area, a light strength or intensity at a light receiving surface is increased and at the same time the light energy such as the solar beam can be increased in its energy utilization efficiency as an electrical energy and a heat energy. CONSTITUTION:A light energy collecting device 110 is comprised of reflection plates 102, 103, 104 and 105 arranged in a crossing direction for collecting reflection light at a light receiving surface of the light receiver 101 for use in receiving light and triangular reflection plates 106, 107, 108 and 109 in which two sides of the adjoining reflection plates 102, 103, 104 and 105 are applied as two sides and the light energy around the light receiving device 101 as well as the light energy directly impinging against the light receiving device 101 is also collected at the light receiving device with the reflection plates.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light energy collector for collecting parallel rays such as sun rays on a light receiving surface of a light receiver and effectively utilizing light energy.

[0002]

2. Description of the Related Art As a conventional technique, FIG. 13 shows a "sunlight lighting system" disclosed in Japanese Patent Laid-Open No. 1-229216. In the figure, 1 and 2 are reflectors, 3 are columns, 4 are drive motors, 5 are rotating shafts, 6 are columns, 7 is windows,
8 is a mount, 9 is a drive unit, and 16 is a dome. The conventional solar lighting system is configured as described above.

Next, the operation will be described. The reflecting mirror 1 is a concave mirror, which is a condensing unit made of one optical element having a focal point for concentrating sunlight. The reflecting mirror 2 is a concave mirror, and is a reflecting portion including one optical element having a focal point for converting the light condensed by the reflecting mirror 1 into parallel rays at the focal position. The daylighting section is configured such that the condensing section configured by the reflecting mirror 1 and the reflecting section configured by the reflecting mirror 2 are made to have the same focus, and the daylighting section is provided with two rotating shafts for tracking the sun. One of them is used as the rotation axis 5 of the condensing unit and is provided on a line passing through the focus so that sunlight can be condensed and collected.

As a second conventional technique, a lens or a Fresnel lens is used as a condenser to collect sunlight, and an opening of the optical fiber is provided at a focal position so that the sunlight can be arbitrarily reflected by the optical fiber. There is also a device for guiding to the position.

As a third conventional technique, there is a solar power generation device in which a large number of solar cells are arranged on a plane to irradiate sunlight to generate electricity, the solar energy is converted into electric energy, and the energy is stored in a battery or the like for use. . A large number of solar cells are connected in series or in parallel and receive sunlight to generate electricity.
The power generation efficiency is 14-20%, depending on the type of solar cell.
Converts sunlight into electric energy.

[0006]

Since the conventional sunlight collecting system is constructed as described above, the reflecting mirror 1 is composed of a concave mirror, and the curved surface of a large concave mirror is used to collect light at a small focal point. It was difficult to increase the accuracy. The reflector 2 placed near the focal point of the reflector 1
Since the concentrated sunlight hits and the intensity of the light is very high, if the reflecting mirror 2 is burnt out or the reflected parallel rays do not pass through the window 7 well and hit a portion other than the window 7,
The part was burned out. Further, since the sunlight collected at the focus position has a small diameter, it is necessary to have high tracking accuracy for tracking the sun, which causes a problem that the tracking device becomes expensive. In the second conventional technique, the sunlight collected at the focal position of the lens or Fresnel lens is
Since the light is focused on a small point having a strong center, it is necessary to burn the opening of the optical fiber and to increase the tracking accuracy for tracking the sun, which causes problems such as an expensive tracking device. Further, the solar cell of the third conventional technology is expensive, and since many expensive solar cells are used,
It will be a very expensive solar power generation device to obtain practical electric energy, and the device will be very large, so it will be very expensive if a sun tracking device is provided, and no sun tracking There was a problem that the power generation efficiency during the hours other than daytime would be greatly reduced if it was fixedly installed in the south direction. The present invention has been made to solve the above problems, the parallel light rays such as sunlight are uniformly condensed on the light receiving surface having a certain area, and the light intensity of the light receiving surface is increased, An object of the present invention is to obtain an inexpensive light energy concentrator, which can increase the efficiency of energy use by converting light energy such as sunlight into electric energy or heat energy and can reduce the amount of solar cells used.

[0007]

[Means for Solving the Problems] Claim 1 according to the present invention
The light energy concentrator is composed of at least four reflectors arranged in a cross direction and at least four triangular reflectors each having two adjacent sides, and collects light energy in the light receiver. It shines. The light energy collector of claim 2 has a light-receiving surface that is a solar cell, and the light-receiving surface is provided with a light-receiver that is in thermal contact with the heat exchanger whose back surface is cooled by a cooling medium. is there. Further, in the light energy collector of claim 3, the light receiving surface is a solar cell, and the back surface of the solar cell is in thermal contact with the heat exchanger cooled by the cooling medium with the thermoelectric generator element interposed therebetween. It is equipped with a light receiver. In the light energy collector of claim 4, a plurality of light energy collectors are fixed between the transparent plate and the heat conducting plate. Further, the optical energy collector according to claim 5 has at least four sets of reflectors which are arranged in a cross direction and which are composed of a large number of small flat reflectors that reflect light in the same direction, and adjacent to the previous reflector. It is composed of at least four sets of reflectors each of which is composed of a large number of small-sized reflecting plates that reflect light in the same direction, with two sides that meet each other.

[0008]

The means for collecting the light energy of the light energy collector of claim 1 according to the present invention collects not only the light energy directly impinging on the light receiver but also the light energy around the light receiver by the reflecting plate. It acts to increase the light intensity on the surface of the light receiver. Further, the means for providing a heat exchanger on the back surface of the solar cell of the light energy collector of claim 2 cools the solar cell to improve the power generation capacity, and converts the light energy that could not be generated into heat energy. It works to increase energy use efficiency. Further, the means for providing the thermoelectric generator between the solar cell and the heat exchanger of the light energy collector according to claim 3 converts the temperature difference between the solar cell and the heat exchanger into electric energy and uses the energy. Acts to increase efficiency. Further, the means for fixing the plurality of light energy collectors between the transparent plate and the heat conducting plate of the light energy collector of claim 4 acts to strengthen the structure. Further, the light energy collector according to claim 5 is composed of four sets of reflectors arranged in a cross direction, and four sets of reflectors each having two adjacent sides of the former reflector, and collects light energy. In addition to the light energy that directly impinges on the light receiver, the means for emitting light also concentrates the light energy around the light receiver by means of a reflector to increase the light intensity on the surface of the light receiver, and also the height of the light energy collector. Acts to lower.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. <First Embodiment> The optical energy collector shown in FIG. 1 is a first embodiment of the present invention. In the figure, a light energy collector 110 is a reflector 10 arranged on the light receiving surface side of a light receiver 101 for receiving light and arranged in a cross direction for collecting reflected light.
2, 103, 104, 105, and the reflector 102,
It is composed of triangular reflectors 106, 107, 108 and 109 having two adjacent sides of 103, 104 and 105. FIG. 2 is a plan view of the light energy collector 110 of FIG. 1 viewed from above, and is a view of the light energy collector 110 viewed from the direction in which light comes. 3 is a cross-sectional view of the light energy collector 110 of FIG. 1 viewed from the side.

In the example of the light energy collector 110 shown in FIG.
It is assumed that the angle indicated by 14 is, for example, 112.5 degrees and is opened in the direction in which light comes. Since light such as sun rays is a parallel light beam, the light in the portion 111 directly strikes the light receiver 101,
The light of the second portion is reflected by the reflecting mirror 102 and is reflected by the light receiver 101 as 1
It hits at an angle of 45 degrees shown in 15. Similarly, the light of the portion 113 is reflected by the reflecting mirror 104 and strikes the light receiver 101 at an angle of 45 degrees. At this time, if the length 111 of the light receiver 101 is L, the light width M of the portions 112 and 113 is expressed by the following equation. M = L (1-2COS2θ) Therefore, when θ = 112.5 degrees, M = 0.71L.

In FIG. 2, a light energy collector 110 of the present invention is composed of four reflecting plates 102 arranged in a cross direction,
The length N in the horizontal direction of 103, 104, 105 is taken as the optical receiver 1
This is the case when the length L is 01. Reflector 102,
The light reflected by 103, 104, and 105 respectively strikes the light receiver 101, and the light intensity on the light receiver 101 due to the reflection of each of the reflection plates is θ = 1 as described above.
In the case of 12.5 degrees, the intensity is 0.71 times that of direct light. Also, the triangular reflectors 106, 107, 108, 1
The light reflected by the light beam 09 and hits the respective halves of the light receiver 101 with the same intensity as the direct light. That is,
The light striking the shaded portion 114 is reflected and strikes almost half the shaded portion 115 of the light receiver 101. Therefore, the light receiver 10
The light intensity corresponding to 1 is 5.8 times as high as the light intensity without the light energy collector 110 according to the present invention. Also, the triangular reflectors 106, 107, 108,
Reference numeral 109 is a triangle having two adjacent sides of the reflection plates 102, 103, 104, 105, but the sides other than the two adjacent sides may be curved or polygonal, and need not be particularly triangular. good.

In FIG. 3, four reflecting plates 102 arranged in the cross direction of the light energy collector 110 of the present invention,
The length N in the horizontal direction of 103, 104, 105 is taken as the optical receiver 1
When the length L is 01, the length P of the reflector is 2.6 times L. Since the light energy collector 110 is composed of a plane mirror, it has no focal point, and the reflected light overlaps with each other, so that the light intensity of the light receiver 101 is uniformly increased. Further, since the horizontal length N of the reflection plate is longer than the width M of the light, the light intensity of the light receiver 101 hardly changes even if the angle of the light energy collector 110 is slightly deviated from the direction in which the light 100 comes.

The optical energy collector 11 of the present invention of FIG.
Since 0 is configured as described above, the optical receiver 1
The light intensity of 01 is 5.8 times, and therefore, when a solar cell is used for the light receiving surface of the light receiver 101, it has a power generation capacity of 5 times or more. On the contrary, compared with the case of generating electricity with a single solar cell,
A solar cell with an area of 1/5 has the same power generation capacity. Therefore, the cost of an expensive solar cell is reduced to one fifth, which is effective in constructing an inexpensive solar power generation device.

Optical energy collector 110 according to the present invention
In the case of actually configuring, the light receiver 101 and the reflector 10
The angle between 2, 103, 104 and 105 is 100 to 130.
Even if the angle is in degrees, the length P of the reflecting plate is
Even if the length is 1 to 3 times one side L, the same operation as described above can be performed, and the light 1 of the light energy collector 110
Even if there is a deviation of the angle with respect to 00, the light intensity of the light receiver 101 hardly changes, and the light energy can be efficiently collected. Further, if a tracking device that constantly directs the light energy collector 110 in the direction of light is provided, the light energy can be condensed more efficiently, and the tracking device does not need to be so accurate, and a cheap tracking device is sufficient. effective.

<Second Embodiment> Next, the second aspect of the present invention will be described.
An example of the above is shown in FIG. In the figure, the light receiver 101 of the light energy collector 110 is the solar cell 116 and the heat exchanger 1.
17, the back surface of the solar cell 116 is in thermal contact with the heat exchanger 117, and the heat exchanger 117 is cooled by a cooling medium 118 such as water, oil or air. Cooling medium 1
18 passes through the container 119, the pump 120 and the heat exchanger 117 and returns to the container 119 for circulation. Since the solar cell 116 is cooled by the heat exchanger 117, the light energy collector 11
Even if sunlight 143 having a strong intensity of 0 hits the temperature, the temperature does not rise so much and the power generation efficiency is maintained, and it is possible to generate electric power five times or more as compared with the case without the light energy collector 110. In addition, the heat exchanger 117 is the solar cell 1.
The heat of 16 is absorbed from the back surface to raise the temperature of the cooling medium 118 and return it to the container 119. The cooling medium 118 is the heat exchanger 1.
Since it circulates between 17 and the container 119, the heat of the solar cell 116 is absorbed and the temperature gradually rises. When the temperature of the cooling medium rises to a certain extent, the valve 122 is opened to obtain the cooling medium 123 having a high temperature. Cooling medium 11
When 8 is water, this high temperature cooling medium 123 can be used as hot water. Further, since the light receiver 101 is irradiated with light having an intensity five times or more, a high temperature cooling medium 123 can be obtained. When the amount of the cooling medium in the container 119 is reduced, the amount of the cooling medium 118 can be maintained by replenishing it from 121. Further, when the cooling medium 118 is air, the heat exchanger 117 may use radiating fins and be cooled by a blower.

In the case of using the solar cell 116 having an efficiency of converting light into electricity of 15% in normal solar power generation and having a power generation capacity of 100 W, the light energy collector 110 according to the present invention is used and the solar cell 116 is used. The heat exchanger 11
If cooled by 7, it is possible to generate electric power of about 500 W, which is five times as high as usual. Since the power generated by the solar cell 116 fluctuates greatly due to fluctuations in the weather, etc., the power converter 124 charges the battery 125 so as to maximize efficiency and uses it as electric energy. Further, most of the energy that cannot be generated and becomes heat is absorbed by the heat exchanger 117. This heat energy reaches 2500 W, and the solar energy can be used very efficiently.

<Third Embodiment> Next, a third embodiment of the present invention will be described.
An example of is shown in FIG. In the figure, the light receiver 101 of the optical energy collector 110 is composed of a solar cell 116, a thermoelectric generator 126, and a heat exchanger 117, and the back surface of the solar cell 116 exchanges heat with a thermoelectric generator 126 such as a Peltier element interposed. Thermally contacts the vessel 117. Cooling medium 118 circulates with container 119 similar to that shown in FIG. Since the solar cell 116 is cooled by the heat exchanger 117, the temperature of the solar cell 116 does not increase so much even when the light energy collector 110 receives strong sunlight, and the power generation efficiency is maintained. It is possible to generate more than 5 times the electric power as compared with the case without it. The thermoelectric generator 126 utilizes the temperature difference between the back surface of the solar cell 116 and the heat exchanger 117 to generate electricity. The generated power of the solar cell 116 or the thermoelectric generator 126 fluctuates greatly due to fluctuations in the weather, etc. Therefore, it is preferable to charge the battery 125 with the power converters 124 and 127 so as to maximize efficiency and use it as electric energy. The energy of the sun's rays is strong and the heat exchanger 117
When the temperature is low, the power generation capacity of the thermoelectric power generation element 126 is high and more power can be generated.

Further, the heat exchanger 117 absorbs the heat of the solar cell 116 from the back surface via the thermoelectric generator 126, raises the temperature of the cooling medium 118 and returns it to the container 119. Since the cooling medium 118 circulates between the heat exchanger 117 and the container 119, the temperature of the cooling medium 118 gradually increases by absorbing the heat of the solar cell 116.
When the cooling medium 118 is water, the cooling medium 123 having a high temperature can be used as hot water. Further, since the light receiving surface has a light intensity of 5 times or more, a high temperature cooling medium 123 can be obtained. Therefore, the solar energy collected by the light energy collector 110 is converted into electric energy by the solar cell 116 and the thermoelectric generator 126, and the energy that cannot be generated and becomes heat is almost absorbed by the heat exchanger 117. . Therefore, the solar energy can be used very efficiently. Further, when the temperature of the solar cell 116 becomes high, the solar cell can be cooled by passing a current through the thermoelectric generator 126 in the opposite direction to the power generation.

<Fourth Embodiment> Next, a fourth embodiment of the present invention will be described.
An example of the above is shown in FIG. In the figure, a transparent plate 130 such as acrylic or glass and a heat conducting plate 1 such as an aluminum plate or a copper plate
A plurality of light energy concentrators 110 are sandwiched between them and the contact portions 132, 133 are fixed by adhesion or the like. This fixing method may be a method such as welding or screwing.
The transparent plate 130 is a transparent plate that does not weaken the sunlight 143 incident on the light energy collector 110, and is preferably made of a material having high mechanical strength. A relatively inexpensive one is a plastic plate such as an acrylic plate. The heat conducting plate 131 causes the temperature of the solar cell 116 to rise due to the light energy collected on the bottom of the light energy collector 110, but cools this from the back surface.
It has the effect of radiating heat in a wide area. The heat conducting plate 131 is an aluminum plate which is light and suitable as a material. A metal plate such as a copper plate or an iron plate may be used, but the weight becomes heavy.
The structure in which a plurality of light energy collectors 110 are sandwiched and fixed between the transparent plate 130 and the heat conduction plate 131 is very similar to the honeycomb structure and has very high mechanical strength. Therefore, the light energy concentrator 110 is light and durable because the strength can be maintained even if it is made of a thin and light material, and the amount of the solar cell 116 used is 5 minutes of the area of the transparent body 130 or the heat conductive plate 131. 1 to 1/10 of the above is sufficient, and the amount of the expensive solar cell 116 used is small, so that an inexpensive solar power generation device can be provided.

<Application Example 1> FIG. 7 shows a water heater 144 which is an application example using the optical energy collector 110 according to claim 1 of the present invention. The light receiving part 142 is provided with a light receiver 101 having a black body treatment such as black paint in a part of the heat retaining container 140, and in the heat retaining container 140, liquid 1 such as water to be heated 1 is provided.
Put 41 in it. The light energy collector 110 is set to face the sun. When the light energy collector 110 is irradiated with the sunlight 143, the temperature of the light receiver 101 rises and the liquid 141 is heated by natural convection. Since the area of the light receiver 101 is relatively small, the amount of heat released in the container is small. Further, if the light energy collector 110 has a foldable structure, it becomes a portable water heater 144.

<Application Example 2> FIG. 8 shows a heater 147 which is an application example using the optical energy collector 110 according to claim 1 of the present invention. The light-receiving portion 142 of the light-receiving device 101 is provided with the light-receiving device 101 subjected to black body treatment such as black paint, and the light-receiving device 101 is integrated with the heat conduction plate 145. The light energy collector 110 is set to face the sun. When the light energy collector 110 is irradiated with the sunlight 143, the temperature of the light receiver 101 rises and the heat conduction plate 145 heats. It is possible to heat an object to be heated 146, such as a kettle or a pot, placed on the heat conduction plate 145. In addition, if the light energy collector 110 has a foldable structure, it becomes a portable heater 147.

<Application Example 3> FIG. 9 shows an application example in which the light energy collector 110 is used for the road sign 150. The light 152 of the headlight of the automobile 151 is converted into the light energy collector 110.
Thus, the light intensity of the surface of the road sign 150 that is collected and provided at the bottom is increased by about 5 times as described above. So car 15
Even if the road sign 150 is far from the driver of FIG.
Looks bright and clear. The road sign 150 using the light energy concentrator 110 is highly effective when installed in a place without electricity such as a road in the mountains. In addition, since high-speed roads such as highways must be seen from a distance, a large road sign requires high-power illumination. However, if the light energy collector 110 according to the present invention is used, the vehicle 151 can be Road sign 1 by light 152 of all lights
50 looks bright enough to save energy.

<Application Example 4> FIG. 11 shows a skylight 1 of a house 160 or the like.
This is an application example in which the optical energy collector 110 is used in the part 61. Sunlight 14 by the light energy collector 110
3 is condensed on the skylight 161, and sunlight 143 is introduced into the house from the skylight 161. Normal skylight 16 as described above
About five times as much sunlight 143 as 1 can be introduced into the house. Therefore, even if the skylight 161 having the light energy collector 110 according to the present invention is a small skylight, a lot of sunlight can be taken in.

<Fifth Embodiment> FIG. 12 shows an optical energy collector 170 which is another embodiment of the fifth aspect of the present invention. In the figure, light 171 is light that is directly incident on the light receiver 101. A large number of flat reflectors arranged above the light receiving surface of the light receiver 101 and arranged in a cross direction around the sides of the window 181 having the same shape as the light receiver 101 to collect light in the same direction. Reflector 1 composed of 180
72, 173, 174, 175, the reflectors 172, 1
The reflectors 176, 177, 178, and 179 are composed of a large number of flat reflecting plates 183 that reflect the light 100 in a diagonal direction. Lights 100 and 171 are almost parallel rays, and correspond to sunlight or the like.

The light 171 passes through the window 181 and is directly received by the light receiver 10.
Incident on 1. Further, the light 100 is the light energy collector 1
70 reflectors 172, 173, 174, 175, 17
6, 177, 178, 179, and the reflectors 180, 183, respectively, are reflected and focused on the light receiver 101. A reflector 172 of the light energy collector 170,
Reference numerals 173, 174, and 175 correspond to the reflection plates 102, 103, 104, and 105 of the optical energy collector 110 shown in FIG. 1, which are divided and arranged on the same plane. In addition, the reflector 17
6, 177, 178 and 179 are also reflectors 106, 107, 108 and 109 of the optical energy collector 110 shown in FIG.
Is divided and arranged on the same plane, and a corner portion is further provided with a reflecting mirror 183 and focused on the light receiver 101. Therefore, the intensity of the light condensed on the surface of the light receiver 101 is stronger than that of the light energy collector 110 of FIG. 1 and exceeds 6 times as compared with the case without the light energy collector 170. The height of this light energy collector 170 is the reflection mirror 18
Although determined by the height of 0, the shape can be made extremely thin as compared with the light energy collector 110.

Unlike the Fresnel lens, this light energy collector 170 is formed by arranging flat reflecting plates 180 or 183 in parallel, and the light collecting portion is not a small point such as a focal point but the light receiving unit 101. The light is collected on the light receiving surface so that the light intensity is uniform. Also, the light energy collector 170
Reflectors 172, 173, 174, 175, 176, 1
Although 77, 178, and 179 divide the reflecting mirrors 180 and 183 into four, the number of divided pieces may be any number. If the number of divided pieces is increased, the effect that the light energy collector 170 can be made thinner can be obtained.

[0027]

As described above, in the light energy concentrator of the first aspect of the invention, at least four reflectors arranged in the cross direction for collecting the reflected light on the light receiver and the previous reflector are adjacent to each other. Since it is composed of at least four triangular reflectors each having two sides, parallel rays such as sunlight can be uniformly condensed on a light receiving surface having a certain area, and light energy can be condensed in the direction of light. The angle accuracy of the light receiving device does not need to be so high, and the light intensity of the light receiving surface of the light receiving device can be increased. In the light energy concentrator of the invention of claim 2, the light receiving surface of the light receiver is a solar cell, and the back surface of the solar cell is provided with a light receiver that is in thermal contact with a heat exchanger cooled by a cooling medium. As a result, the solar cell can maintain the power generation efficiency without its temperature rising so much and can heat the cooling medium by the heat energy that could not be converted into electric energy to obtain a high temperature cooling medium. This has the effect of increasing energy utilization efficiency. The light energy collector of the invention of claim 3 improves the power generation capacity of electric energy by converting the solar energy collected by the light energy collector into electric energy by the solar cell and the thermoelectric generator, and The cooling medium can be heated by the heat energy that could not be converted into energy to obtain a high temperature cooling medium, which has the effect of increasing the energy utilization efficiency. In the light energy collector of the invention of claim 4, the structure in which a plurality of light energy collectors are sandwiched and fixed between the transparent plate and the heat conducting plate has a very high mechanical strength,
It is light and durable, requires a small amount of expensive solar cells, and is effective in providing an inexpensive solar power generation device. The light energy concentrator of the invention of claim 5 is a reflector formed of a number of flat reflectors arranged in a cross direction and reflecting light in the same direction, and a reflector reflecting light in a diagonal direction. Since the parallel light rays such as sunlight can be uniformly condensed on the light receiving surface having a certain area, the accuracy of the angle of the light energy collector with respect to the light direction does not need to be so high. The light receiving surface has a high light intensity, and is thin and light.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of an optical energy collector according to the present invention.

2 is a plan view from above for explaining the light energy collector of FIG. 1. FIG.

FIG. 3 is a side sectional view for explaining the optical energy concentrator of FIG.

FIG. 4 is a configuration diagram showing a second embodiment of the optical energy collector according to the present invention.

FIG. 5 is a configuration diagram showing a third embodiment of the optical energy collector according to the present invention.

FIG. 6 is a configuration diagram showing a fourth embodiment of the optical energy collector according to the present invention.

FIG. 7 is a configuration diagram of a water heater showing an application example of the optical energy collector according to the present invention.

FIG. 8 is a configuration diagram of a heater showing an application example of the optical energy collector according to the present invention.

FIG. 9 is a configuration diagram of a road sign showing an application example of the optical energy collector according to the present invention.

FIG. 10 is a front view illustrating the configuration of the road sign shown in FIG. 9;

FIG. 11 is a configuration diagram of a skylight showing an application example of the optical energy collector according to the present invention.

FIG. 12 is a configuration diagram showing a fifth embodiment which is another invention of the optical energy collector according to the present invention.

FIG. 13 is a configuration diagram showing a conventional solar lighting system.

[Explanation of symbols]

 1, 2 Reflector 3 Support 4 Drive motor 5 Rotation shaft 6 Support 7 Window 8 Frame 9 Drive 16 Dome 100 Light 101 Light receiver 102, 103, 104, 105 Reflector 106, 107, 108, 109 Reflector 110 Optical energy Concentrator 116 Solar cell 117 Heat exchanger 118 Cooling medium 119 Container 120 Pump 122 Valve 124, 127 Electric power converter 125 Battery 126 Thermoelectric generator element 130 Transparent plate 131 Thermal conduction plate 140 Thermal insulation container 141 Liquid 142 Light receiving part 143 Solar light 144 Water heater 145 Heat conduction plate 146 Heated object 147 Heater 150 Road sign 151 Automobile 160 House 161 Skylight 170 Light energy collector 171 Light 172, 173, 174, 175 Reflector 176, 177, 178, 179 Reflector 180, 183 reflector 81 window

Claims (5)

[Claims] 1. A light receiving device for receiving light, at least four reflectors arranged in a cross direction on the light-receiving surface side of the first light receiving device for reflecting light and collecting reflected light at the first light receiving device, An optical energy concentrator, comprising at least four triangular reflectors each having two adjacent sides of the reflector. 2. The light receiver comprises a solar cell and a heat exchanger, the light receiving surface is a solar cell, and the back surface of the solar cell is in thermal contact with a heat exchanger cooled by a cooling medium. The optical energy collector according to claim 1, further comprising: 3. The light receiver is composed of a solar cell, a thermoelectric generator and a heat exchanger, the light receiving surface is a solar cell, and the back surface of the solar cell is cooled by a cooling medium with the thermoelectric generator interposed therebetween. The light energy collector according to claim 1, further comprising a light receiver in thermal contact with the heat exchanger. 4. The light energy collector according to claim 1, wherein a plurality of light energy collectors are fixed between the transparent plate and the heat conducting plate. 5. A light receiving device for receiving light, comprising at least four sets of reflecting plates each having a plurality of flat surfaces arranged in a cross direction on the light receiving surface side of the first light receiving device and reflecting light in the same direction. And two or more adjacent sides of the previous term reflector, and at least four sets of reflectors configured by a large number of flat reflectors that reflect light in the same direction. Light energy concentrator.