CN102725582A - Natural light tracking LED lighting device - Google Patents

Abstract

Disclosed is a natural light tracking LED lighting device (1) that has a high degree of freedom in the design, can be installed in any location in a building having two or more stories, and does not require complicated controls. The natural light tracking LED lighting device (1) is equipped with a first solar cell (11) that is installed on an outdoor location such as a roof (4) and generates photovoltaic power, direct current wiring (12) that supplies indoors the power generated by said first solar cell (11) as is, and an LED lighting unit (13) that connects to said direct current wiring (12). In addition, the direct current wiring (12) is split into a plurality of wires that are respectively connected to the LED lighting unit (13).

Description

Natural light tracking LED lighting device

technical field

The present invention relates to an LED lighting device mainly used in living spaces, and in particular to a natural light tracking LED lighting device capable of automatically adjusting the illuminance of the LED lighting device with changes in the amount of natural light.

Background technique

In densely populated urban areas, etc., it is often difficult to maintain a distance between adjacent houses, and it is often difficult to receive light from windows installed on walls of houses. Therefore, various technologies have been developed to make up for the lighting function of the house when the daylight entering from the windows on the wall of the house is insufficient.

For example, a skylight for daylighting installed on the roof of a house can provide enough daylight with less blocking of sunlight by nearby buildings. In addition, for example, a light tunnel with an opening on the roof surface and a mirror-finished interior can guide light to any place in the building through the light tunnel. By providing a lighting unit on the roof of a house as described above, sufficient lighting can be obtained even when sufficient lighting cannot be obtained from windows installed on the wall of the house (for example, Patent Document 1).

In addition, in recent years, various lighting devices have been proposed for residential lighting, which include solar cells and secondary batteries, charge the power generated by the solar cells to the secondary batteries during the day, and use the power of the secondary batteries to illuminate LEDs at night. The appliance emits light (for example, Patent Document 2). In addition, in this type of lighting, there is also a product having a function of adjusting illuminance and/or color temperature according to the purpose (for example, Patent Document 3).

prior art literature

patent documents

Patent Document 1: JP-A-2009-176606 Gazette;

Patent Document 2: JP-A-2007-227324 Gazette;

Patent Document 3: Japanese Unexamined Patent Publication No. 2008-281239.

Contents of the invention

The problem to be solved by the invention

However, skylights can only supply light to rooms installed directly under the roof, and therefore cannot supply sufficient light to rooms other than the uppermost floor in houses with two or more stories. In addition, since the cross-sectional shape of the tunnel must be enlarged for sufficient lighting, a large space is required for installation. Furthermore, since it is necessary to avoid the positions of structural bodies such as beams and columns of houses and install them, the installation positions cannot be freely determined. In addition, when installing a skylight and/or a light tunnel in an existing building construction, it is necessary to penetrate a roof or the like, and therefore a large construction is required.

On the other hand, lighting with various dimming functions includes a sensor that detects external temperature and/or color temperature, etc., and controls lighting based on information detected by the sensor, so the processing tends to be complicated.

Therefore, an object of the present invention is to provide a natural light tracking type LED lighting device that has a high degree of design freedom, can be installed regardless of the location in a building with two or more floors, and does not require complicated control.

means of solving problems

The first natural light tracking LED lighting device according to the present invention is characterized by comprising: a solar cell that generates electricity from sunlight; a DC wiring that supplies power generated by the solar cell as it is; and an LED lighting connected to the DC wiring. .

In addition, "supply the electric power generated by the solar cell as it is" here refers to supplying the electric power generated by the solar cell in a direct current state without conversion to alternating current.

A second natural light tracking LED lighting device according to the present invention is characterized in that, in addition to the above configuration, the DC wiring is branched into a plurality of lines and connected to the LED lighting respectively.

The effect of the invention

According to the natural light tracking LED lighting device of the first invention, the illuminance of the LED lighting can be controlled according to the amount of power generated by the solar cell by supplying the power generated by the solar cell to the LED lighting as it is without any control. Therefore, when the weather outside is fine, the amount of power generated by the solar cell increases, and as a result, the illuminance of the LED lighting also increases. In addition, when the weather outside the house is cloudy or rainy, the power generation of the solar cell decreases, and the illuminance of the LED also decreases. In this way, the illuminance of LED lighting is linked to the illuminance of outdoor natural light, and it is possible to provide a simulated skylight that can emit light in an analog manner in conjunction with external light even when windows for obtaining external light cannot be installed. Therefore, when the occupant lives in the house for a long time, the biological clock of the occupant is not destroyed, and the influence on the life pattern of the occupant can be reduced.

In addition, LEDs can emit light with direct current, so it is only necessary to supply the power generated by the solar cell to LED lighting through direct current wiring as it is, and there is no need for a power conditioner for converting direct current to alternating current, and the structure can be simple and Eliminates conversion losses of electrical power. Also, since it is not necessary to detect the brightness of external light, it is not necessary to provide a brightness detection sensor.

According to the second natural light tracking LED lighting device of the present invention, since the DC wiring is branched into multiple lines and connected to the LED lighting, one solar cell can be used to provide simulated skylights in two or more rooms.

Description of drawings

FIG. 1 is a block diagram showing the overall configuration of a natural light tracking lighting device.

Fig. 2 is a schematic configuration diagram showing electrical wiring of a house using a natural light tracking type lighting device.

Fig. 3 is a perspective view showing an example of LED lighting.

Fig. 4 is a schematic configuration diagram showing electrical wiring of a house for explaining another embodiment of a natural light tracking type lighting device.

Detailed ways

A preferred embodiment of the natural light tracking LED lighting device 1 will be described below with reference to FIGS. 1 to 4 . This natural light tracking type LED lighting device 1 is a device installed mainly in residential buildings 2 such as apartment houses and/or residences, apartments for the elderly, and can be used even in spaces where external light cannot be sufficiently obtained during the daytime. External light changes the illuminance in conjunction with it, and serves the same function as a skylight that can obtain external light. As shown in FIG. 1 , the composition of the natural light tracking LED lighting device 1 includes: a plate-shaped first solar cell 11 that is installed on the roof 4 of the building 2 and receives sunlight to generate electricity; 11 DC wiring 12 for supplying generated electric power to the interior of building 2; and LED lighting unit 13 for emitting light by applying voltage through the DC wiring 12.

The first solar cell 11 can be, for example, a silicon-based solar cell. This silicon-based solar cell is configured to connect a plurality of cells using materials such as silicon wafers to generate desired power, but it may also be cells using other materials and/or Or batteries made of multiple materials.

In addition, as shown in FIG. 3 , the LED lighting unit 13 is a lighting unit formed in a shape imitating a skylight on the ceiling 5 of the room, and its configuration includes: a plurality of LEDs 14; 16 ; cover the base plate 16 and diffusely reflect the light-emitting part of the LED14 while reflecting the light-emitting part of the LED14 ; for example, a cloudy-colored diffuse reflection cover 17 ; and a protection circuit (not shown) that prevents excessive voltage from being applied to the LED14.

A plurality of LEDs 14, a combination of one or more LEDs 14 that emit a spectrum close to sunlight is more suitable as a simulated skylight, but it is not limited thereto. Wait to choose properly. In addition, by combining LEDs 14 that emit not only visible light but also ultraviolet rays and/or infrared rays, it is possible to approach the skylight further. LED14. In addition, the diffuse reflection cover 17 is used to diffusely reflect the light of the LED 14 of the point light source widely in the room, but a film capable of changing the color temperature may be attached to the diffuse reflection cover 17 according to the occupant's preference.

In addition, although not shown, the protection circuit is, for example, an avoidance circuit connected in parallel to each LED 14, and when a voltage higher than a predetermined voltage is applied, the voltage is limited to a predetermined voltage by a Zener diode to avoid A voltage equal to or higher than a predetermined value is applied to the LED 14 . In addition, the protection circuit may be other known protection circuits used in the LED lighting unit 13 . Moreover, when the maximum power generation amount of the 1st solar cell 11 is below the sum total of the rated voltage of each LED14, you may make it the structure which does not provide a protection circuit.

The natural light tracking type LED lighting device 1 is structured so that when the amount of light received by the first solar cell 11 is large, the amount of power generated by the first solar cell 11 increases accordingly, and a large voltage is also applied to the LED lighting unit 13 through the DC wiring 12. , LED14 emits light with high illuminance. On the other hand, when the amount of light received by the first solar cell 11 is small, the amount of power generated by the first solar cell 11 also decreases, the voltage applied to the LED lighting unit 13 also decreases, and the LED 14 emits light at low illuminance. Therefore, the brightness of the LED lighting unit 13 is determined according to the illuminance of sunlight outside the room. Therefore, by installing this natural light tracking LED lighting device 1 in a room where lighting from the window is difficult, it is possible to simulate the lighting with the same change as the lighting from the window. of light is supplied to the room.

In addition, in the building 2 where the natural light tracking type LED lighting device 1 is installed, an AC wiring 21 for supplying power supplied from the power company to various parts in the building 2 is also arranged, and the wiring is such that the power can also be supplied to the building 2. LED lighting unit 13 is supplied. As shown in FIG. 2 , the electric power supplied from the electric line 3 of the electric power company to the inside of the building 2 via the incoming line 22 is distributed to each part by the switchboard 23 . In addition, a second solar cell 25 is installed on the roof 4 of the building 2 in addition to the first solar cell 11 . Furthermore, a secondary battery 26 charged with electric power generated by the second solar cell 25 and a power conditioner 27 for converting the electric power charged by the secondary battery 26 from direct current to alternating current are provided, and these are connected to the switchboard 23 . The AC wiring 21 extending from the switchboard 23 is wired to the LED lighting unit 13 via the AC adapter 24 in addition to wiring to electric equipment 28 a attached to the building 2 such as other lighting equipment and/or an outlet 28 b to supply power.

With the above configuration, the secondary battery 26 is charged with the electric power generated by the second solar battery 25, and the charged electric power can be consumed during the time when the energy consumption increases. In addition, the AC wiring 21 extending from the switchboard 23 is also wired to the LED lighting unit 13 via the AC adapter 24, so the LED lighting unit 13 functions as a simulated skylight that follows external light and emits light during the day, and can be used as normal lighting at night. equipment.

In addition, although the example of the natural light tracking type LED lighting device 1 using one LED lighting unit 13 was demonstrated in the said embodiment, the number of LED lighting units 13 is not limited to this. For example, as shown in FIG. 4, in a building 2a of a two-story building, a first-floor LED lighting unit 13a arranged on the first floor of the building 2a and a second-floor LED lighting unit 13a arranged on the second floor of the building 2 may also be arranged. The lighting unit 13b is the two LED lighting units 13a, 13b. That is, the DC wiring 12 is wired in parallel from the 1st solar cell 11, and this DC wiring 12 is connected to each LED lighting unit 13a, 13b. Moreover, the AC wiring 21 extended from the switchboard 23 is wired to each LED lighting unit 13a, 13b via the AC adapter 24, respectively.

According to this configuration, the power generated by the first solar cell 11 receiving external light is distributed and supplied to the LED lighting units 13 a and 13 b, so that the LED lighting units 13 a and 13 b can be controlled according to the illuminance of the external light received by the first solar cell 11 . Lights up separately and functions as a virtual skylight. In addition, the LED lighting unit 13 can be used as a normal lighting device at night by power supplied from the AC wiring 21 wired from the switchboard 23 . The number of the LED lighting units 13 may be three or more, or two or more may be installed on the same floor.

In addition, embodiment of this invention is not limited to the said form, Of course, it can change suitably in the range which does not deviate from the scope of the thought of this invention.

Industrial Applicability

The natural light-tracking LED lighting device 1 of the present invention is well applicable to situations where sufficient external light cannot be obtained by daylighting from windows in houses and/or multi-storey buildings 2 in narrow plots.

Explanation of reference signs:

1 Natural light tracking LED lighting device

2 buildings

11 First solar cells (solar cells)

12 DC Wiring

13LED lighting unit (LED lighting)

Claims (2)

1. A natural light tracking type LED lighting device, characterized in that it has: Solar cells for generating electricity from sunlight; The DC wiring that supplies the electricity generated by the solar cell as it is; and LED lighting connected to this DC wiring. 2 . The natural light tracking LED lighting device according to claim 1 , wherein the DC wiring is bifurcated into multiple lines, which are respectively connected to the LED lighting. 3 .

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