JPS6247321B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device that utilizes daylight, and includes a lighting space,
For example, it relates to a method for reducing power consumption by introducing daylight into the interior of a building.

During the daytime, daylight exists outdoors, consisting of skylight diffused into the atmosphere and direct sunlight. However, conventional lighting devices that utilize daylight do not fully utilize such daylight, and have not been effective in reducing power consumption.

An example of such a lighting device is shown in FIG. To explain this configuration, 10 is a room in a building serving as an illumination space, and a window 11 for introducing daylight is provided on one side wall of the room. This room 1
A plurality of rows of lights 14 as artificial light illumination means are provided on the ceiling 13 of the window 11 at predetermined intervals from the window 11 side. A sensor 15 is attached, and a control device 16 detects the amount of sky light obtained through this first sensor 15.
4 control is performed. This lighting device can be used when sky light is supplied from a bright sky with an average sky luminance of about 7000 [cd/m ² ], for example.
This sky light gives the inside of the room 10 an illuminance distribution a as shown in the figure.

However, in such a device, the range where the working surface illuminance is 400 [Lx] or more is approximately 300 [Lx] from window 11.
It is a narrow range of [m]. Therefore, when the control device 16 determines the range where the work surface illuminance is 400 [Lx] or more based on the detected amount of sky light obtained by the first sensor 15, and the lamps 14 in that range are turned off. There were at most two rows of lamps 14 from the window 11 that could be turned off even if there was a problem.

The present invention has been made in view of these points, and by effectively utilizing both sky light and direct sunlight, the illuminance of the work surface related to daylight in the lighting space is increased, and the artificial light lighting means is turned off. The present invention provides a daylight-utilizing lighting device that expands the range and reduces power consumption.

Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings.

FIG. 2 is an explanatory diagram of the present invention, and parts corresponding to those in FIG. 1 are designated by the same reference numerals, and their explanation will be omitted.

The window 11 is formed with a first window 21 at its lower part and a second window 22 at its upper part.

This first window 21 is formed of a normal glass plate or the like, and is set so that sky light mainly enters the vicinity of the window 11 of the room 10. In the figure, x indicates the indoor illuminance distribution due to sky light when the sky brightness is 7000 [cd//m ² ], and the work surface illuminance of about 400 [Lx] or more can be obtained by sky light. The position is within 2.5 m from the window in the room, and the lamp 14 serving as the artificial light illumination means in the first row on the window side can be turned off.

Based on the amount of sky light detected by the first sensor 15, the control device 16 controls the lighting fixtures 14 in the first row on the window side to blink.

Further, the second window 22 is formed with a directional glass block so that the angle of the light emitted into the room is upward from the horizontal, regardless of the angle of the incident light from outside. Now, when the vertical angle of the incident light is 50 to 60 degrees, the output side is designed so that the horizontal angle is 5 to 8 degrees upward, and as shown in Fig. 2, the direct sunlight entering the second window 22 is The light enters the ceiling 13 about 4 to 5 meters away from the window 11,
It will be reflected here. The illuminance distribution obtained by this reflected light is indicated by y in the figure.
Note that this illuminance distribution y does not include direct sunlight that enters directly through the first window 21.

Therefore, the illuminance distribution in the room is given by the sum of the illuminance distribution x related to sky light and the illuminance distribution y related to direct sunlight, as shown by z in the figure.
It is possible to obtain a working surface illuminance of about 400 [Lx] or more in the range of 200 to 3000, and the lamps 14 in the second and third rows on the window side can be turned off. At this time, the first window 21 is
By locating the window 22 below the window 22, direct sunlight is prevented from directly entering the interior of the room 10 through the first window 21, and is further introduced into the room through the second window 22. Since direct sunlight is used as secondary reflected light from the ceiling 13, the interior of the room can be illuminated with soft light.

23 is a second sensor, which is attached to the ceiling 13 so as to have sensitivity only in the range of angle α looking into the second window 22.
It detects the amount of direct sunlight entering the room through the second window 22. Then, the control device 16 uses the amount of light detected by the second sensor 23 to control the blinking of the lamps 14 in the second and third rows on the window side.

With such a configuration, when sky light enters through the first window 21, the sky light illuminates the room by 400 [Lx] or more within a range of 2.5 [m] from the window, as shown in the illuminance distribution x. A working surface illuminance of
The control device 16 determines this via the first sensor 15 and turns off the first row of lamps 14 on the window side.

Then, the amount of light from the sky decreases, and
If it is not possible to secure work surface illuminance of 400 [Lx] or more within a range of 2.5 [m], control device 16
This is determined via the first sensor 15, and the lamps 14 in the first row on the window side are turned on.

Furthermore, when direct sunlight enters through the second window 22, a composite illuminance distribution z is given indoors as described above, and within a range of 5 [m] from the window, 400
Work surface illuminance of [Lx] or higher can be obtained. Control device 1
6 is the second window 22 detected by the second sensor 23
The above-mentioned composite illuminance distribution z is determined based on the amount of direct sunlight incident from the window, and the lamps 14 in the second and third rows near the windows are turned off.

In addition, the direct sunlight is weak, and the work surface illuminance of 400 [Lx] can only be secured up to the illumination range of the lighting fixture 14 in the second row next to the window.
400 [Lx] or less, the control device 16 determines this through the amount of light detected by the second sensor 23, turns off the lights 14 in the second row from the window, and turns off the lights 14 in the third row. Works to light up.

Note that in this embodiment, the first sensor 15
Although the second sensor 23 is installed outdoors and the second sensor 23 is installed indoors, the installation location is not limited to this, and it is also possible to use one sensor to illuminate the room with a composite illuminance of sky light and direct sunlight. The distribution z may be determined and the lighting equipment 14 in the room may be controlled to blink.

Furthermore, the daylight-utilizing lighting device can be used not only for indoor lighting but also for lighting tunnels and the like.

Furthermore, the window may have a structure that allows sky light and direct sunlight to enter the room from the same window without dividing it into a first window and a second window, and the lighting equipment may be controlled not only by the blinking control described above but also by dimming. is also possible.

As described above, in the present invention, not only sky light but also direct sunlight is introduced, and by increasing the illuminance of the work surface of the lighting space related to daylight, the sensor can be used to illuminate a wide area of the lighting space. The light illumination means can be controlled, and power consumption can be more effectively reduced during the daytime.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional daylight-utilizing lighting device, and FIG. 2 is an explanatory diagram of a daylight-utilizing illumination device of the present invention. DESCRIPTION OF SYMBOLS 10... A room as an illumination space, 14... A lamp as an artificial light illumination means, 15... A first sensor, 16...
Control device, 21...first window, 22...second window, 2
3...Second sensor.

Claims (1)

[Claims] 1. An illumination space provided with windows for introducing sky light and direct sunlight, an artificial light illumination means provided in this illumination space, and an amount of sky light introduced from the window. A first sensor for detecting, a second sensor for detecting the amount of direct sunlight introduced from the window, and control of the artificial light illumination means according to the amount of light detected by the first and second sensors. A daylight utilization lighting device characterized by comprising a control device that performs the following. 2 In the lighting space, use windows as the first window to introduce sky light.
window and a second window for introducing direct sunlight, the first window is set to allow sky light to enter near the window, and the second window is set to direct sunlight to the ceiling of the lighting space. Claim 1, characterized in that the reflected sky light is set to be incident on the back side of the sky light irradiation range.
Daylight-utilizing lighting device as described in . 3. In the illumination space, the artificial light illumination means that shares the illumination of the sky light irradiation range is controlled based on the amount of light detected by the first sensor, and the artificial light illumination means that shares the illumination of the solar direct light irradiation area is controlled by the second sensor. 3. The daylight-utilizing lighting device according to claim 1 or 2, wherein the lighting device is controlled based on the amount of light detected.