JP2002258951A - Solar follow-up type lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary solar follow-up type lighting device capable of reducing power consumption by operating rational driving according to the change of the duration of bright sunshine. SOLUTION: This solar follow-up type lighting device is provided with a dome 11 formed of translucent materials, a light reflecting means 70 arranged in the dome 11 for reflecting a sunlight, a driving means 40 for rotating the light reflecting means 70, a rechargeable power source 50 for supplying a power to the driving means 40, a solar battery panel 64 for charging the rechargeable power source 50, and a casing 21 fixed to the dome 11 in which the driving means 40 and the rechargeable power source 50 are housed. A unit 30 integrally rotatable in the casing 21 is constituted of the driving means 40 and the rechargeable power source 50, and the light reflecting means 70 and the solar battery panel 64 are linked to the unit 30 so as to be made rotatable integrally with the unit 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sun-tracking type daylighting device, and more particularly, to a sun-tracking type daylighting device equipped with a solar cell panel as a driving power source.

[0002]

2. Description of the Related Art In order to take sunlight into a room where sunlight does not reach, a lighting hole penetrating from a roof of a building to a ceiling is opened, and a light reflecting means is disposed at an upper end of the lighting hole to reflect light. There is a daylighting device that guides sunlight that strikes the means to the interior through a daylighting hole. Since the direction of the sun changes with time, a sun-tracking type in which the direction of the light reflecting means is rotatable in accordance with the direction of the sun is known in order to perform daylighting efficiently.

In a sun-tracking type daylighting device, the rotation of the light reflecting means is performed using a motor as a drive source. The motor is
During the sunshine period from sunrise to sunset, the light reflecting means is appropriately rotated to cause the light reflecting means to follow the sun. If a commercial power supply is used as the power supply for the motor, wiring from indoors is required, and installation is troublesome.Therefore, use a rechargeable power supply such as a capacitor or a secondary battery as the power supply, and attach a solar panel There is also a daylighting device that is mounted so that a rechargeable power supply is charged by a solar panel. In order to increase the charging efficiency of the solar cell panel, it is desired that the solar cell panel be oriented in the direction of the sun, like the light reflecting means.

Therefore, a lighting device in which a solar cell panel is arranged so as to be rotatable integrally with light reflecting means has been proposed. At this time, it is necessary to provide electrical wiring between the solar panel and the rechargeable power supply, but since the rechargeable power supply is fixed to the dome side, when the solar panel is rotated only in one direction, There was a problem that the wiring was twisted or entangled.
For this reason, from sunrise to sunset, after rotating the solar cell panel together with the light reflecting means, the rotation direction is reversed,
Moving to the next sunrise position. The electric power stored in the rechargeable power supply is used for the rotation of the light reflecting means after sunset.

[0005]

As described above, the light reflecting means is inverted after sunset together with the solar cell panel. However, the light reflecting means can be rotated in the same direction without being inverted and moved to the next sunrise position. A device is desired. The reason is that the rechargeable power supply is not charged after sunset, so that the power consumption of the rechargeable power supply after sunset needs to be as small as possible. For example, in summer when the solar altitude is high, FIG. As shown in (a), since the rotation angle of the light reflecting means from sunrise to sunset exceeds 180 °, the light reflecting means should be rotated in the same direction instead of being inverted (arrow A direction). However, this is because the rotation angle can be reduced and the power consumption can be reduced. Further, in order to follow the sun in an area where the sun does not set all day, such as white night in a high latitude area, it is necessary to rotate the light reflecting means in the same direction all day.

An object of the present invention is to provide a rotating sun tracking type daylighting device that can perform a rational operation according to a change in daylight hours and reduce power consumption.

[0007]

In order to solve the above problems, a sun tracking type daylighting device (10) of the present invention comprises a dome (11) formed of a translucent material, and a dome (11) formed inside the dome (11). Deployed, light reflecting means (70) for reflecting sunlight, driving means (40) for rotating the light reflecting means (70), and a rechargeable power supply (50) for supplying power to the driving means (40), A solar panel (64) for charging the rechargeable power supply (50), the driving means (40) and a rechargeable power supply;
(50) and a casing fixed in the dome (11)
(21), in a solar tracking type daylighting device comprising a rechargeable power supply (50) and a driving means (40), constitute a unit (30) that can be integrally rotated in a casing (21), the solar cell Panel (6
4) and the light reflecting means (70) are connected to the unit (30) so as to be able to rotate integrally with the unit (30).

[0008]

[Operation and Effect] The sun tracking type daylighting device (10) of the present invention
The drive means (40) and the rechargeable power supply (50) are configured as a unit (30) that can rotate integrally, and the unit (30) and the solar cell panel (64) can rotate integrally, so that Wiring between the fixed side becomes unnecessary. Therefore, the light reflecting means (7
Even if 0) is rotated one or more rounds in the same direction, the electric wiring does not become entangled. Therefore, after rotating the light reflecting means (70) following the sun from sunrise to sunset, and then moving the light reflecting means (70) to the sunrise position on the next day, the light reflecting means
The rotation angle up to the sunrise position on the day after (70) is measured, and the light reflecting means (70) can be rotated in the direction of smaller rotation angle according to the magnitude of the rotation angle. Power consumption can be reduced by performing a rational operation according to the daylight hours in this way. In addition, since it can rotate one or more rounds in the same direction, it can cope with white nights in a high latitude area.

[0009]

1 and 2 show a sun tracking type daylighting apparatus (10) according to the present invention. In the following, the light reflection means (7
0) will be described below, but the present invention is not limited to the suspension-supporting type, and it is needless to say that the present invention can also be applied to a stationary-type daylighting device that supports the lower part of the light reflecting means. . Note that, for simplicity of description, as shown in FIG. 2, the direction of the sun S is “front”, and the opposite side is “back”.

As shown in FIG. 2, the sun tracking type daylighting device 10 is installed at an upper end of a daylighting hole 80 which is opened from the roof of a building to the ceiling. The lighting hole (80) has an upper end opening at the roof of the building. The daylighting hole (80) is generally formed in a square having a side of about 120 cm, and its direction varies depending on conditions such as the size, structure, orientation, and required amount of light of a building or room. Inner surface (81) of lighting hole (80)
Is mirror-finished to efficiently guide the light reflected by the sun-tracking type daylighting device indoors. In addition, the lighting hole (8
At the lower end (indoor well side) of (0), a transparent indoor light distribution plate (not shown) for diffusing light entering the indoor through the lighting hole (80) is attached.

The sun tracking type daylighting device (10) is shown in FIGS.
As shown in the figure, a control box (20) containing driving means and the like is provided on the top of a dome (11) made of a light-transmitting material attached to the upper end of the lighting hole (80), and the control box (20) Light reflecting means from (70) and solar panel (64)
Is suspended and supported.

As shown in FIGS. 1 and 2, the dome (11) protects the light reflecting means (70) from wind, rain, dust, etc. It is a translucent cover. The dome (11) can be formed, for example, by molding a transparent acrylic resin plate or a polycarbonate resin plate having a thickness of about 3 to 5 mm, or by processing hard glass, hard plastic, or the like. The illustrated dome (11) is an acrylic resin whose center is processed into a substantially hemispherical shape and whose peripheral edge is formed in a square shape according to the shape of the lighting hole (80). The dome (11) is not limited to a hemispherical shape, but may have various shapes such as a square shape and a conical shape, and may be reinforced with a frame as needed. At the center of the top of the dome (11), as shown in FIG. 5, a mounting hole (12) for mounting the control box (20) is opened, and around the mounting hole (12),
Multiple screw holes for screwing the control box (20)
(13) is established at predetermined intervals.

As shown in FIGS. 3 to 5, the control box (20) comprises a cylindrical casing (21) attached to a mounting hole (12) at the top of the dome (11), and the casing (2).
Control unit rotatably arranged inside 1)
(30).

As shown in FIGS. 3 to 5, the casing (21) comprises a bottomed cylindrical casing body (22) and a lid (23) for closing the upper opening of the casing body (22). Can be. The casing main body (22) has a screw that is engaged with the lid (23) on the outer periphery of the upper end, and a flange is located below the screw.
(24) protrudes outward. The flange (24) has a screw hole (13) formed around the mounting hole (12) of the dome (11).
A screw hole (25) is opened facing the seal material (14).
And screwed to the dome (11). Further, the casing body (22) is formed with an internal gear (26) that meshes with a gear (43) of the unit (30) described below, in a lower portion of the inner surface, around one round. Further, a recess is formed in the center of the bottom surface of the casing body (22), and a unit to be described later is formed in the center of the recess.
The central shaft (32) of the (30) extends through the shaft hole (27) into which the margin is inserted. A bearing (28) that rotatably supports the central shaft (32) is attached to the recess. Lid (2
3), the inner surface is provided with a screw that meshes with the screw of the casing main body (22), and the outer edge projects so as to cover the flange (24), and opens the upper surface opening of the casing main body (22). close. Further, a concave portion is formed in the center of the inside of the lid body (23), and the central axis of the unit (30) is formed in the concave portion.
A bearing (29) for rotatably supporting (32) is mounted.

As shown in FIG. 5, a control unit (30) is provided inside the casing body (22). The control unit (30) has a bottomed cylindrical housing (3
1) Inside the driving means (40), rechargeable power supply (50) and daylighting device
Control means (60) for performing all the controls of (10) is provided. At the center of the housing (31), a hollow central shaft (32) penetrating vertically through the housing (31) is attached. Center axis (3
The bearing (2) provided in the casing (21) described above
8) It is rotatably mounted on (29). The lower end of the central shaft (32) protrudes downward from the shaft hole (27) of the casing (21), and the distal end thereof has a suspension shaft (3) for suspending and supporting the light reflecting means (70).
5) protrudes sideways. Further, holes (33) and (3) are provided near the upper and lower ends of the central axis (32), respectively, for passing wires (65) for connecting a solar cell panel (64) and a rechargeable power supply (50), which will be described later.
4) is opened through the hollow portion of the central shaft (32). As shown in FIG. 5, a motor (4) is provided inside the housing (31).
1), a reduction mechanism (42) and a gear (43) connected to the reduction mechanism
The driving means (40) is provided. The gear (43) is provided so as to protrude downward from the bottom surface of the housing (31), and meshes with the internal gear (26) of the casing body (22). A rechargeable power supply (50) serving as a power supply for the daylighting device (10) is provided inside the housing (31). In this embodiment, the rechargeable power supply (50) uses a large-capacity capacitor (51) serving as a power supply for the driving means (40) and a secondary battery (52) serving as a power supply for the control means (60). . The rechargeable power supply (50) is electrically connected to a solar panel (64) described later,
Charged by (64).

At the upper end of the housing (31), a lighting device (10)
A circuit board (61) constituting control means (60) for performing the control is provided. In addition to the CPU, various circuits, memories, and the like are mounted on the circuit board (61), and the above-described driving means (40),
The rechargeable power supply (50) and the angle detection means (62) described later are electrically connected. At the upper end of the central axis (32), a detecting means (62) for detecting the rotation angle of the control unit (30) and causing the light reflecting means (70) to follow the direction of the sun is provided. In the illustrated embodiment, a potentiometer is used as the detection means (62), and the relative rotation angle between the center axis (32) and the lid (23) is detected. The electric wiring (63) of the detection means (62) passes through the hollow portion from the upper end of the central axis (32), and
It protrudes from the upper hole (34) of (32) and is connected to the circuit board (61).

As shown in FIGS. 1 to 3, the light reflecting means (70) supports a plurality of reflecting panels (71), (71), (71) with a supporting frame (7).
It is attached to 2) and is suspended and supported inside the dome (11). In the embodiment shown, the support frame (72) is
The (sun S side) is a downwardly inclined rod, and a hook (73) for suspending and supporting is protruded upward slightly behind the center. The support frame (72) has three reflective panels (71)
(71) (71) is deployed. Each reflection panel is a mirror body that reflects sunlight, and is made by, for example, attaching a resin film having a mirror surface formed by aluminum evaporation to a lightweight styrene resin plate.

As shown in FIG. 4, a solar cell support frame (66) further projects forward from the support frame (72). (64) is attached in a state of being inclined upward. In addition, the solar cell support frame (66)
(32). Since the solar cell panel (64) is rotatably mounted integrally with the support frame (72) of the light reflecting means (70), it follows the sun integrally with the light reflecting means (70) and keeps high Efficient power generation can be performed.

As shown in FIG. 4, an electric wiring (65) is connected to the solar cell panel (64), and the wiring (65) is formed by a lower hole formed in the central axis (32). From (33), it passes through the inside of the central shaft (32), enters the housing (31) from the upper hole (34), and is electrically connected to the rechargeable power supply (50).

When the motor (41) as the driving means (40) is rotated, the sun-tracking type daylighting device (10) having the above-described configuration is driven by a speed reduction mechanism.
Power is transmitted to the gear (43) via (42), and the gear (43) rotates. The driving means (40) is mounted on the housing (31),
Further, since the housing (31) is freely rotatable with respect to the casing (21), when the gear (43) is rotated while meshing with the internal gear (26) of the casing (21), the housing (31)
Rotates relative to the casing (21). Since the light reflecting means (70) is suspended and supported by the housing (31), the light reflecting means (70) also rotates integrally with the housing (31).

In the daylighting device (10) of the present invention, since no wiring is provided between the rotating side and the fixed side, all the wirings rotate integrally with the housing (31). Therefore, the lighting device (10) of the present invention can rotate the light reflecting means (70) one or more rounds in the same direction. By rotating the motor (41) in the reverse direction, it is of course possible to rotate in the reverse direction.
Therefore, after rotating the light reflecting means (70) following the sun from sunrise to sunset, the light reflecting means (70) is moved to the sunrise position on the next day.
When moving (70), the angle between the direction of sunset of the light reflecting means (70) and the sunrise of the next day is measured, and by moving in the direction in which the moving distance is short, power consumption can be saved. it can. It can also handle white nights in high latitude areas.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A sun tracking type daylighting device (10) having the above configuration is installed in a daylighting hole (81) opened on a roof, and various information such as the latitude and time of the installation location is input to a control means (60). Then, the detection value detected by the azimuth and angle detection means (62) of the light reflection means (70) is adjusted. However, based on the direction of the light reflecting means (70), the control means (60) drives the driving means (40) according to the installation location. Specifically, during the sunshine period from sunrise to sunset, the light reflecting means (70) is rotated following the sun to guide the sunlight indoors. It should be noted that the motor (41) is not driven continuously during the sunshine hours, but at predetermined time intervals, for example, 10 hours.
The light reflecting means (70) may be intermittently rotated by driving for several seconds every minute. Also, during the sunshine hours, the solar cell panel (64), which rotates integrally with the light reflecting means (70), receives sunlight and generates power to charge the rechargeable power supply (50).

After sunset, the motor (41) is reversely rotated to rotate the light reflecting means (70) to the sunrise position on the next day. At this time, the angle between the sunset position and the sunrise position of the next day is controlled by the control means.
The rotation is calculated in the direction (60), where the rotation angle is smaller, specifically, the rotation angle is smaller than 180 °. For example, as shown in FIG. 6 (a), the rotation angle of the light reflecting means (70) from sunrise to sunset is large because the sunshine time is long in summer. Therefore, the rotation of the light reflecting means (70) from sunset to the sunrise position of the next day is as shown by the arrow A in FIG.
It is desirable to make it the same direction as the rotation direction during the day. vice versa,
As shown in FIG. 6 (b), the sunshine time is short in winter and the rotation angle of the light reflecting means (70) from sunrise to sunset is small. Therefore, light reflection means (70) from sunset to the sunrise position of the next day
Is desirably in a direction opposite to the daytime as indicated by an arrow B in FIG. 6B. In this way, by controlling the rotation direction of the light reflecting means (70) after sunset according to the rotation angle, it is possible to save power consumption after sunset where charging cannot be performed.

The description of the above embodiments is for the purpose of illustrating the present invention and should not be construed as limiting the invention described in the appended claims or reducing the scope thereof. Further, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

[Brief description of the drawings]

FIG. 1 is a perspective view of a sun tracking type daylighting device.

FIG. 2 is a cross-sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged perspective view of a control box and light reflecting means.

FIG. 4 is an enlarged view of a portion surrounded by a circle IV in FIG. 3;

FIG. 5 is a sectional view of a control box.

6A is a diagram showing sunrise and sunset positions in summer, and FIG. 6B is a diagram showing sunrise and sunset positions in winter.

[Explanation of symbols]

 (10) Sun tracking type daylighting device (20) Control box (21) Casing (30) Control unit (40) Drive means (50) Rechargeable power supply (64) Solar panel (70) Light reflection means

Claims (3)

[Claims] 1. A dome (11) formed of a translucent material, and light reflecting means disposed in the dome (11) and reflecting sunlight.
(70), driving means (40) for rotating the light reflecting means (70), a rechargeable power supply (50) for supplying power to the driving means (40), and charging the rechargeable power supply (50) Solar Panel (64)
And housing the driving means (40) and the rechargeable power supply (50),
(11) In a sun tracking type daylighting device having a casing (21) fixed in a driving means (40) and a rechargeable power supply (50), a unit rotatable integrally in the casing (21). (30), wherein the light reflecting means (70) and the solar cell panel (64) are linked to the unit (30), and can rotate integrally with the unit (30). Tracking type daylighting device. 2. An internal gear (2) is provided on an inner surface of the casing (21).
6) is formed, and the driving means (40) has a gear (4) meshed with the internal gear (26).
3) is provided, and by rotating the gear (43) by the driving means (40),
The unit (30) includes the light reflecting means (70) and the solar cell panel (6
The sun tracking type daylighting device according to claim 1, wherein the sun tracking type daylighting device rotates together with 4). 3. The solar module according to claim 1, wherein the casing is disposed on a top of the dome, and the light reflecting means is suspended from the unit. Tracking type daylighting device.