JPH1012019A - Guided sunlight system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To introduce sunlight gathering beside a window into the inner portion of a room inside so as to distribute the sunlight uniformly to improve the luminous balance of the room inside by introducing the sunlight into the room inside through a sunlight lighting portion, and reflecting the sunlight through a reflection portion so as to illuminate the room inside. SOLUTION: When sunlight L is obtained from outdoors, the incident sunlight in a sunlight lighting portion 20 is guided to the main reflection portion 41 formed on a ceiling 40, and is further reflected by the portion 41 so as to light a room inside inner portion 32. The portion 20 is equipped with first face 23 which is approximately flat plate-like and has a large number of protrusive rows 24 having an approximately circular arc-like surface contour in cross section in parallel, and second face 25 which scattering radiates the incident light in an orthogonal direction to the row direction of the protrusive rows 24, and guides light from the face 25 on the ceiling 40. As the result, the sun light gathering in a room inside window side portion 31 can be introduced into the portion 32 so that the portion 32 is illuminated. Accordingly, room inside illumination is balanced so that the artificial illumination beside a window can be turned off, the installation work is simple, the restrictions on design are little, and cost can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sunlight collecting system for indoor lighting using sunlight.

[0002]

2. Description of the Related Art In recent years, it has become necessary to further promote energy saving in consideration of the global environment, and power saving is the most important theme. For this purpose, it has been considered to take sunlight indoors and turn off or control a part of artificial lighting.

[0003] Conventionally, if the ceiling can not be so high,
The following methods have been adopted to collect sunlight. In FIG. 16, reference numeral 1 denotes a window, which comprises an upper window 11 and a lower window 12. A bar 13 is provided between the upper window 11 and the lower window 12, and a so-called light shelf 14 is provided on the bar 13. Light shelf 14
Has an upper surface 15 made of a material having a high reflectance,
The sunlight L radiated from above from outside is the light shelf 14
It is installed so that it is reflected by the upper surface 15 of the upper window 11 and enters the inside of the upper window 11.

[0004] In FIG. 17, a prism glass 16 is provided outside the upper window 11. The prism glass 16 has an inclined plane sunlight incident side 17,
A sunlight exit side 18 having a refraction angle set so as to enter the inside of the upper window 11 is provided.

Although not shown, a so-called lighting duct having an inner surface formed of a reflecting mirror is installed on the ceiling, and sunlight is collected indoors through the duct.

[0006]

However, the above-described light shelf 14, prism glass 16, and lighting duct have the following problems.

[0007] When the light shelf 14 is installed, there is a problem that the state where the interior window is bright near the interior and the interior is dark cannot be solved. In addition, the prism glass 16 can collect sunlight into the interior of the room, but there is a problem in that installation and design are largely restricted by installing the glass at an angle outside the window 1. And the lighting duct had a problem that the structure was complicated and construction was difficult. When used in combination with artificial lighting, for example, there is a problem that indoor work is hindered, for example, the light is reflected on a computer screen, the indoor lighting cannot be balanced, and the light is not turned off near the window after all. .

[0008] In view of the above-mentioned circumstances, the sunlight collecting system of the present invention can introduce more sunlight accumulated near a window into the interior of the room and distribute the introduced light evenly to the interior of the room. The artificial lighting at the window can be turned off and the indoor lighting can be turned off, so there is no obstacle to indoor work, etc., the structure is simple, the construction is simple, and there are few design restrictions. It is an object of the present invention to provide a solar lighting system that can reduce costs.

[0009]

According to the first aspect of the present invention, there is provided a solar lighting system including a solar lighting unit installed in a house for introducing outdoor sunlight into a room and irradiating the indoor ceiling with the sunlight. The sunlight collecting portion has a substantially flat plate shape, a first surface having a large number of parallel ridges having a surface contour having a substantially circular arc-shaped cross section, and an incident light beam of the ridge. A second surface that diffuses and emits light in a direction perpendicular to the column direction, and irradiates the ceiling with light from the second surface. And has a main reflecting portion for reflecting light from the sunlight collecting portion indoors. In this solar lighting system, the solar lighting unit introduces sunlight into the room, and the reflecting unit formed by the ceiling reflects the introduced sunlight to illuminate the room.

[0010] In the solar lighting system according to the second aspect, the contour formed by the lower surface of the main reflecting portion in a vertical cross section in a direction from the solar lighting portion to the interior of the room is a secondary. It is characterized by having a shape along a curve. In this solar lighting system, the amount of light rays introduced into the interior of the room increases.

According to a third aspect of the present invention, in the solar lighting system, the solar lighting section is provided on a window. In this solar lighting system, sunlight that enters from a window is introduced into the interior of the room.

According to a fourth aspect of the present invention, there is provided a solar lighting system, wherein the house is provided with a solar lighting auxiliary device for receiving the outdoor sunlight and making it incident on the solar lighting section. In this solar lighting system, the amount of light rays incident on the solar lighting unit increases.

According to a fifth aspect of the present invention, the ceiling is located at an indoor sunlight incident side portion near the solar sunlight collecting portion, and at a position deeper in the indoor than the indoor sunlight incident side portion. An indoor rear part, the indoor sunlight incident side part is the main reflection part, and the indoor rear part is a sub-reflection inclined upward from the indoor sunlight incident side part toward the indoor rear part. And an artificial light source for irradiating a light beam to the sub-reflecting portion to indirectly illuminate the indoor space. In this solar lighting system, the brightness of the inner part of the room where the brightness is insufficient even when sunlight is introduced is improved.

According to a sixth aspect of the present invention, there is provided a solar lighting system including a solar lighting unit for introducing outdoor sunlight into a room and irradiating the indoor ceiling with the sunlight. An indoor sunlight incident side portion close to the light lighting section, and an indoor rear portion located in the interior deeper direction than the indoor sunlight incident side portion, wherein the indoor sunlight incident side portion is the sunlight collecting portion. The main reflection portion is inclined downward from the unit side toward the interior depth direction, and is a main reflection portion that reflects light from the sunlight collecting portion to the interior, and the interior depth portion is the interior depth range from the indoor sunlight incident side portion. An artificial light source is provided, which is a sub-reflecting portion that is inclined upward in a partial direction, and irradiates a light beam to each reflecting portion to indirectly illuminate the indoor space. In this solar lighting system, the brightness of the inner part of the room where the brightness is insufficient even when sunlight is introduced is improved.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of the present invention. In the figure, the same reference numerals are given to the same components as those shown in FIGS. 16 and 17, and the description thereof will be omitted. In FIG. 1, a solar lighting system 10
Is generally constituted by a sunlight lighting unit 20 and a ceiling 40. The sunlight lighting section 20 has a configuration in which a sunlight lighting sheet 21 is mounted on an upper portion of the window 1.

[0016] As shown in FIG.
Reference numeral 1 denotes a substantially flat transparent body, which is a monofilament 22.
Are arranged in parallel in contact with each other. The first surface 23 of the sunlight collecting sheet 21 is formed by a surface formed by these monofilaments 22, and each of the monofilaments 22 forms a large number of ridges 24 having a surface contour having a substantially circular arc-shaped cross section. Is formed.
The second surface 25 of the daylighting sheet 21 is a transparent film 2
6 and a monofilament 22 is adhered to the opposite surface. As shown in FIG. 15, the sunlight collecting sheet 21 may be a transparent body in which the ridge 24 is integrally formed on the first surface 23.

In FIG. 1, a sunlight lighting sheet 21 is
The ridge 24 is positioned so as to be substantially horizontal. Also,
The indoor 30 has a ceiling 4 having a surface with a reflectivity of about 80%.
0 is provided, and the ceiling 40 is a main reflection portion 41 inclined downward from the indoor window side portion 31 toward the indoor back side 32.
It has a structure with.

In the above configuration, when the sunlight L is radiated from outside, the sunlight incident on the sunlight collecting part 20 is radiated to the main reflection part 41 formed on the ceiling 40, and further the main reflection part 41 is formed. Reflected by 41, interior back side 3
2 is irradiated. As a result, it is possible to introduce the sun rays accumulated in the indoor window side part 31 to the indoor rear part 32, and the indoor rear part 32 is illuminated.

FIG. 2 shows a second embodiment of the present invention. The first embodiment and FIGS.
Elements that are the same as those shown in FIG.
The description is omitted. This configuration is different from the embodiment shown in FIG. 1 in that a solar light sheet 21 is attached to the upper window 11 to form a solar light collecting unit 20, and a so-called light shelf 14 is provided on the crosspiece 13. This is a point provided as a solar lighting assisting device.

The daylighting system 1 having the above configuration
In the case of 0, when the sunlight L irradiates, the sunlight reflected by the upper surface 15 of the light shelf 14 also enters the sunlight collecting sheet 21. Therefore, indoor 30
Can be increased, and the illuminance of the indoor back side part 32 is further increased.

FIG. 3 shows a third embodiment of the present invention. The first and second embodiments and FIG.
6, the same components as those shown in FIG. 17 are denoted by the same reference numerals, and description thereof will be omitted. This configuration is different from the embodiment shown in FIGS. 1 and 2 in that the ceiling 40 is in a direction from the indoor window side 31 to the indoor back side 32 and the contour line in the vertical section is a quadratic curve. This is the point that the main reflection portion 42 is formed along the shape.

In the above-described solar lighting system 10, the amount of light reflected by the main reflector 42 and illuminating the indoor 30 is
It is possible to increase the distance further inside the indoor rear side portion 32. Therefore, the indoor illuminance is made more uniform.

In the solar lighting system 10 having such a configuration, more sunlight accumulated near the window is provided on the indoor back side 3.
2 can be introduced. In addition, as shown in FIGS. 4 to 7, the introduced sunlight can be evenly distributed to the indoor 30, so that a decrease in illuminance can be suppressed even when the distance from the window 1 increases. As a result, the illuminance of the indoor 30 can be made substantially constant. Moreover, since the sunlight lighting section 20 is formed by the sunlight lighting sheet 21,
The structure is simple, construction is simple, and costs can be reduced. In addition, the artificial lighting inside the room can be turned off while the solar light is radiating, and it is possible to significantly save energy. In particular, as shown in FIG. 8, the power for lighting in the daytime in summer when the power consumption field peaks can be reduced. Further, since the lighting of the indoor 30 is indirect lighting, the lighting of the indoor 30 is more balanced than when direct artificial lighting is performed, and the environment on the lighting surface can be improved.

FIG. 9 shows a fourth embodiment of the present invention. The same components as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. This configuration is different from the above-described embodiment in that the ceiling 40 is
1. Upper indoor sunlight incident side portion 40a and indoor rear side portion 3
2 is a point composed of an indoor rear side portion 40b located at the upper part of the second. The indoor sunlight incident side portion 40a is
1, the interior rear side portion 40b is a sub-reflection portion 43 that is inclined upward from the interior window side portion 31 toward the interior depth side portion 32. An artificial light source 50 is provided on the wall 33 located below the sub-reflection section 43 and facing the window 1.
The artificial light source 51 is provided on the crosspiece 13 below the main reflection part 41. The artificial light sources 50 and 51 are:
Each of the sub-reflection units 43 and the main reflection unit 41 is installed at a position where the light beam is irradiated.

In this configuration, the artificial light source 50 illuminates the sub-reflection section 43, and the light reflected by the sub-reflection section 43 illuminates the interior rear side section 32. As a result, it is possible to maintain the illuminance in the indoor rear side portion 32 where the illuminance is insufficient even when sunlight is taken. Further, even in the case of little sunshine, such as at night or in cloudy or rainy weather, it is possible to illuminate the main reflection portion 41 with the artificial lighting 51 and illuminate the indoor window side portion 31. In the above embodiment, the artificial light source 5
Because of the provision of 0 and 51, the illuminance indoors can be maintained even when the sunlight is insufficient. In addition, the same functions and effects as those of the above embodiment can be obtained.

Then, the indoor window side portion 31 and the indoor back side portion 32
However, both are configured to be indirectly illuminated by the main reflection unit 41 and the sub-reflection unit 43, so that the illumination atmosphere in the indoor 30 is constant and the illumination is balanced. Therefore, even when the artificial lighting at the window is turned off, the feeling of strangeness can be reduced. In addition, since the indoor 30 is configured to be indirectly illuminated, it is possible to eliminate troubles such as work in the indoor 30 such that the illumination is reflected on a computer screen and is difficult to see. In addition, since the entire surface of the ceiling 40 is illuminated, the brightness is increased as a whole, and a “brightness” is obtained, and the atmosphere of the indoor 30 can be kept bright even if the actual illuminance is reduced.

Further, on the ceiling 40, reflecting portions 41 and 43 are provided.
Only, and there is no need to incorporate lighting fixtures.
The structure is simple, ceiling work and electrical work can be divided, and the work can be done easily. Therefore, design restrictions are reduced, and costs can be reduced.
Since the lighting fixture can be installed as a centralized light source, unlike the case where the lighting fixture is dispersed over the entire surface of the ceiling 40, waste heat can be used. In the above-described embodiment, the sunlight lighting unit 20 is configured by the sunlight sheet 21. However, the sunlight lighting unit 20 is not limited to the sheet 21.
Other structures are also possible. In short, any structure that guides outdoor sunlight toward the ceiling 40 may be used. In addition, the ceiling 40 may have a structure in which a film is merely provided, and may have a simple structure. At this time, as shown in FIG. 10, the ceiling can be supported by a sprinkler.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the solar lighting system described in the above embodiment, specifications for calculating indoor illuminance are shown below. High color rendering metal halide lamp 400 watts Number of 6 Ceiling reflectivity 80% For the above specifications, as shown in FIG.
L2, L3, L4, L5, and L6 are set, points α, β, γ, and δ are set as representative points based on the illuminance and the reflectance, and the reflection luminance is calculated. At this time, the calculation is performed assuming that each representative point is under the influence of the ramp of α ← L1 + L4 β ← L1 + L4 γ ← L1 + L2 δ ← L1 + L4 + L2 + L5.

Then, the illuminance at points P and Q is calculated from the reflection luminance of each representative point. Here, FIG.
As shown in FIG. 7, points P and Q are set to be located on the desk surface. As a result, the following results were obtained. Point P About 790 lux Point Q about 660 lux Furthermore, as a result of calculation including the case where sunlight is irradiated,
The graph of FIG. 13 was obtained. This graph shows the indoor illuminance as a distance from the window surface, and the ideal indoor illuminance suitable as a work space is shown as a solid line 0, and the calculation result by the lamp (concentrated light source) as the above calculation result is as follows: Dashed line A
The measurement data obtained by natural sunlight
Shown as a dotted line B, a dashed line A lamp (concentrated light source)
And the case where the natural lighting of the dotted line B is used together is shown as a solid line C.

The above calculation results show that the daylighting system of the above embodiment can maintain the indoor illuminance within an appropriate range as a working space.

[0031]

According to the solar lighting system of the present invention,
The sunlight is introduced into the room from the sunlight collecting unit, and the interior is illuminated by the main reflection unit provided on the ceiling.In addition, an artificial light source is provided, so that more sunlight accumulated near the windows can be used inside the room. It is possible to distribute the introduced light evenly to the back of the room, it is possible to turn off the artificial lighting near the window by taking the indoor lighting balance, without hindrance to work indoors, etc. In addition, the structure is simple, the construction is simple, the design is less restricted, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a solar lighting system according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a solar lighting system according to a second embodiment of the present invention.

FIG. 3 is a sectional view showing a solar lighting system according to a third embodiment of the present invention.

FIG. 4 is a diagram showing the relationship between indoor illuminance and the distance from a window in a conventional window.

FIG. 5 is a diagram showing a relationship between indoor illuminance and a distance from a window when only a conventional light shelf and only an inclined main reflection unit according to the present invention are installed.

FIG. 6 is a diagram illustrating a relationship between indoor illuminance and a distance from a window in the sunlight collecting system according to the second embodiment of this invention.

FIG. 7 is a diagram showing a relationship between indoor illuminance and a distance from a window in a sunlight collecting system according to a third embodiment of the present invention.

FIG. 8 is a diagram showing a change over time in a daily power consumption.

FIG. 9 is a sectional view showing a solar lighting system according to a fourth embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a case where the ceiling of the solar lighting system of the present invention is provided together with a sprinkler.

FIG. 11 is a plan view showing settings of a lamp for performing illuminance calculation in the embodiment of the present invention.

FIG. 12 is a side sectional view of FIG. 11;

FIG. 13 is a diagram showing a result of illuminance calculation in the example of the present invention.

FIG. 14 is a perspective view showing a sunlight-collecting sheet constituting a sunlight-collecting unit according to the embodiment of the present invention.

FIG. 15 is a perspective view showing a sunlight-collecting sheet constituting a sunlight-collecting section in the embodiment of the present invention.

FIG. 16 is a cross-sectional view illustrating a conventional sunlight collecting method.

FIG. 17 is a cross-sectional view illustrating a conventional sunlight collecting method.

[Explanation of symbols]

 Reference Signs List 20 solar light collecting part 23 first surface 24 ridge 25 second surface 30 indoor 32 indoor deep part 40 ceiling 41 main reflection part L sunlight

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Takayuki Akimoto 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation

Claims (6)

[Claims] Claims: 1. A solar light installation section installed in a house for introducing outdoor sunlight into an indoor space and irradiating the indoor ceiling with the sunlight, the solar light installation section having a substantially flat plate shape, A first having a plurality of parallel ridges having a surface profile having a substantially circular arc-shaped cross section;
A surface, and a second surface that diffuses and emits the incident light beam in a direction orthogonal to the row direction of the ridges, and irradiates the ceiling with light from the second surface. A daylighting system comprising: a main reflecting portion that is inclined downward from a side of the light receiving portion toward the interior of the room and reflects light from the sunlit portion to the indoors. 2. The solar lighting system according to claim 1, wherein a contour line formed by a lower surface of the main reflecting portion in a vertical cross section in a direction from the solar lighting portion to a deep portion inside the room. A solar lighting system characterized by having a shape following a curved line. 3. The solar lighting system according to claim 1, wherein the solar lighting unit is provided in a window. 4. The solar lighting system according to claim 1, further comprising a solar light assisting device that receives the outdoor sunlight in a house and causes the sunlight to enter the solar lighting unit. A solar lighting system, characterized in that: 5. The solar lighting system according to claim 1, wherein the ceiling is an indoor sunlight incident side portion near the solar lighting portion, and the ceiling is more indoor than the indoor sunlight incident side portion. An indoor rear part located in the rear direction, the indoor sunlight incident side part is the main reflection part, and the indoor rear part is directed from the indoor sunlight incident side part toward the indoor rear part direction. A sun lighting system comprising: a sub-reflection portion inclined upward; and an artificial light source for irradiating a light beam to the sub-reflection portion to indirectly illuminate a room. 6. A solar lighting unit for introducing outdoor sunlight into a room and irradiating the indoor sunlight with the indoor ceiling, wherein the indoor ceiling is an indoor sunlight incident side near the solar lighting unit. And an indoor rear part located in the interior deeper direction than the indoor sunlight incident side part, and the indoor sunlight incident side part is directed from the sunlight collecting part side toward the indoor deeper part. It is a main reflection part that inclines downward and reflects light from the sunlight collecting part indoors, and the interior rear part is inclined upward from the indoor sunlight incident side part toward the interior rear part. An artificial light source, which is a reflecting portion, and irradiates a light beam to the sub-reflecting portion to indirectly illuminate the indoor space.