JP2006210045A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain appropriate lighting with less energy consumption by taking outdoor light indoors. <P>SOLUTION: A method for operating this lighting system comprises: a step S1 of regularly referring to a database control logic; a step S2 of controlling a color temperature of ambient lighting to meet a predetermined color temperature corresponding to a time zone; a step S3 of obtaining integration values of outdoor light and indoor light, respectively; and a step S4 of controlling the slant angle of an electric blind and the illuminance intensity of ambient lighting as to make a outdoor-light-to-indoor-light ratio meet to a target ratio of the database control logic, wherein actual entry light into a room through a window is adjusted so as to meet a predetermined ratio of outdoor light by the electric blind even if outdoor light strongly enters at a low angle, and at the same time, the illuminance intensity of ambient lighting is adjusted, thereby outdoor light and indoor light can be dynamically mixed in a balanced manner, and therefor indoor lighting taking in outdoor light is appropriately performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an illumination system, and more particularly to an illumination system that incorporates outdoor light from a window to save energy.

As described above, Patent Document 1 proposes an illumination system that saves energy by taking in outdoor light from a window. According to the prior art, the lighting device corresponding to the receiving means that has received the signal from the ID card possessed by the user is turned on, and the illuminance of the area illuminated by the lighted lighting device is set to the set value. The control device controls the opening / closing amounts of the luminaire and the blind in response to the output from the pyranometer.
Japanese Patent Publication No. 6-34394

  In the above-described prior art, the outdoor light can also be used to save energy and obtain the desired indoor illuminance. However, if the outdoor light is bright, the blinds are opened and used to reduce the illuminance of the lighting fixture. For example, when the outdoor light shines strongly from a low angle, for example, in the evening sun, it hits the user's face and display directly, and it is dazzling or the screen is not visible, so the outdoor light is not always taken in well. There is a problem that it cannot be said.

  The objective of this invention is providing the illumination system which can perform appropriately the illumination which took in outdoor light.

  The illumination system of the present invention is an illumination system installed in a room having a window, an outdoor light control means for controlling the incidence of outdoor light from the window, a lighting fixture capable of adjusting the illuminance for illuminating the room, and an outdoor light An outdoor light illuminance meter that measures illuminance, an indoor light illuminance meter that measures the illuminance of indoor light from the lighting fixture, and an integrated value of illuminance measured by the outdoor light illuminance meter and the indoor light illuminance meter are determined in advance for each time zone. And control means for adjusting the illuminance of the lighting fixture and the incident light level in the outdoor light control means so that the ratio is substantially constant.

  Further, in the illumination system of the present invention, the control means, as a result of adjusting the illuminance of the luminaire and the incident light level in the outdoor light control means, when the illuminance of the room light becomes lower than a predetermined target illuminance, Control is performed so as to maintain the illuminance of the lighting fixture at the target illuminance.

  Furthermore, in the illumination system of the present invention, the luminaire includes a local luminaire that illuminates the work surface, and an overall luminaire that illuminates the entire room, and the indoor illuminance meter includes the illuminance of the work surface. The control means increases the illuminance of the local lighting device when the illuminance of the room light is lower than a predetermined target illuminance.

  As described above, the illumination system of the present invention incorporates outdoor light control means that can control the incidence of outdoor light such as a blind on the window when the outdoor light is taken in and energy-saving and desired illumination is realized. In addition to providing an outdoor light illuminometer and an indoor light illuminometer, the control means calculates the outdoor light integrated value for each predetermined time zone based on the integrated illuminance values respectively measured by the outdoor light illuminometer and the indoor light illuminometer. The illuminance of the lighting fixture and the incident light level in the outdoor light control means are adjusted so that the integrated value of the room light becomes substantially constant at a predetermined ratio.

  Therefore, even if the outdoor light shines strongly from a low angle, the light that actually enters the room through the window is adjusted so that the outdoor light control means has a predetermined ratio for each time zone. In combination with illuminance adjustment, outdoor light and indoor light can be dynamically mixed in a well-balanced manner. As a result, illumination that incorporates outdoor light can be appropriately performed.

  Further, as described above, the lighting system of the present invention makes adjustments so that the illuminance of the indoor light by the luminaire and the illuminance of the outdoor light from the window become substantially constant. When the target illuminance cannot be maintained, the illuminance of the lighting fixture is controlled so that the illuminance of the room light is maintained at the target illuminance. Therefore, even if it is dark outside due to rain or the like, the minimum illuminance required for work, etc. Can be maintained.

  Furthermore, as described above, the illumination system according to the present invention is illuminated locally instead of illuminating the whole when maintaining the illumination with the minimum illuminance necessary for work or the like when the outdoor environment becomes dark due to rain or the like. Therefore, further energy saving can be achieved.

[Embodiment 1]
FIG. 1 is a diagram showing an overall configuration of an illumination system according to an embodiment of the present invention. This lighting system is installed in a room 2 having a window 1 such as an office. This lighting system includes an electric blind 11 that is an outdoor light control means that controls the incidence of outdoor light from the window 1, an ambient light 12 that is a lighting device that illuminates the entire interior space and can adjust the illuminance, and a desk. 3, a task illumination 13 that is a lighting fixture that can locally illuminate the work surface on the desk 3 and can adjust the illuminance, an outdoor light illuminance meter 14 that measures the illuminance of outdoor light, and illuminations 12 and 13. The indoor light illuminance meter 15 for measuring the illuminance of the indoor light by the light source 11 and the control device 16 for controlling the electric blind 11, the ambient illumination 12 and the task illumination 13 based on the measurement results by the outdoor light illuminance meter 14 and the indoor light illuminance meter 15. Configured.

  The electric blind 11 can be adjusted for daylighting by slat angle control or the like. In the present invention, the outdoor light control means only needs to be configured to be able to control the amount of incident outdoor light, and is not limited to the blind, but applies a voltage to a roll screen capable of adjusting lighting and a dielectric embedded in glass. Thus, functional glass that can be adjusted for lighting may be used. The ambient lighting 12 is configured to include a plurality of types of fluorescent lamps, and the color temperature can be changed as will be described later.

  It is desirable that the indoor light illuminance meter 15 should not be exposed to outdoor light as much as possible. It is installed at a position sufficiently away from the window 1, next to a partition, or provided with a hood so that external light does not enter directly. It suffices to measure only the amount of room lighting. Or you may make it obtain | require the average value of those outputs by installing the indoor light illumination meter 15 in several places other than the window 1 vicinity.

  FIG. 2 is a block diagram showing an electrical configuration of the control device 16. The control device 16 includes a drive circuit that controls the electric blind 11, the ambient illumination 12, the task illumination 13, and the like in the microcomputer and its peripheral circuits. Specifically, the control device 16 includes a blind slat control unit 21 that controls the slat angle of the electric blind 11, an ambient illumination control unit 22 that controls the illuminance of the ambient illumination 12, and a task that controls the illuminance of the task illumination 13. Illumination control unit 23, outdoor light illuminance information acquisition unit 24 that acquires illuminance information from outdoor light illuminance meter 14, indoor light illuminance information acquisition unit 25 that acquires illuminance information from indoor light illuminance meter 15, and control that stores control logic A control database 27, a control determination unit 27 that performs control determination based on the control logic from outputs from the outdoor light illuminance information acquisition unit 24 and the indoor light illuminance information acquisition unit 25, and outputs a control instruction, and a clock 28 are provided. Configured.

  In response to a trigger from the clock 28, the outdoor light illuminance information acquisition unit 24 and the indoor light illuminance information acquisition unit 25 each have an outdoor light illuminance meter 14 and an indoor light illuminance meter at predetermined intervals, for example, every 1 minute, 3 minutes, or 5 minutes, respectively. 15 is activated, the illuminance information is acquired, and the integrated value is obtained.

  On the other hand, in response to the time information from the clock 28, the control determination unit 27 refers to the control logic database 26 at a predetermined time, for example, every hour or every hour and every 30 minutes therebetween. The electric blind 11, the ambient lighting 12, and the task lighting 13 are controlled. In the control logic database 26, as shown in Tables 1 and 2, control logic is stored for each time period divided by a predetermined time interval.

  The control logic includes a target ratio between the integrated value of outdoor light by the outdoor light illuminance information acquisition unit 24 and the integrated value of indoor light by the indoor light illuminance information acquisition unit 25, and the color of the indoor ambient lighting 12 for each time period. The temperature and the indoor light illuminance minimum target value are set. The control logics shown in Tables 1 and 2 are examples, and are for general offices and for offices that perform display work, respectively.

  The target ratio between the integrated value of the outdoor light and the integrated value of the indoor light is measured for each time period in a model office or the like, so that the incident external light does not become unpleasant to the resident and is incident as much as possible. It is set to utilize outside light. At that time, it is determined in consideration of the work environment such as fine desk work and display work. In addition, the surrounding environment such as the location of surrounding buildings and the direction of windows (east, west, north, and south) may be considered. Further, the control logic may be prepared for each weather classification such as change in the amount of solar radiation according to the season and fine weather / cloudy weather.

  The minimum indoor light illuminance target value is determined based on a circadian rhythm suitable for a living body. This makes it possible to adjust biological rhythms such as brightening and awakening in the morning. In order to obtain such an effect, the time zone for maintaining high illuminance is preferably about 0.5 to 4 hours in the morning. It is widely known that the addition of high-intensity light in the morning has the effect of adjusting the biological rhythm of humans, and that high color temperature light has a physiological arousal effect than low color temperature light. Japanese Unexamined Patent Publication No. 2000-252084 is a detailed example of the illumination system used. In Table 1 and Table 2 above, the indoor light illuminance minimum target value in each time zone is uniform, but each value may be varied as the minimum value.

  The control determining unit 27 determines the blind slat control unit 21 so that the integrated value of the next time zone becomes a ratio stored corresponding to the time zone according to the measured integrated value of the previous time zone. The slat angle of the electric blind 11 is controlled via the ambient illumination control unit 22, the illuminance of the ambient illumination 12 is controlled via the ambient illumination control unit 22, and the illuminance of the task illumination 13 is controlled via the task illumination control unit 23.

  It should be noted that when the outdoor light and the integrated value of the indoor light are not obtained immediately after the start of use of the room 1 or when the integrated value of the outdoor light is not obtained in the winter season, the control determining unit 27 sets the electric blind 11 The slat angle and the illuminance of the ambient illumination 12 and the task illumination 13 may be controlled with default values stored in the control logic database 26.

  FIG. 3 is a flowchart for explaining an example of specific control logic in the control determination unit 27. When activated in the morning, the control determination unit 27 refers to the control logic database 26 periodically (when a predetermined time is reached) based on the time information in step S1, and first, in step S2, the ambient illumination 12 Is controlled to a predetermined color temperature corresponding to the time zone.

  Next, in step S3, an integrated value of outdoor light is acquired from the outdoor light illuminance information acquisition unit 24, and an integrated value of indoor light is acquired from the indoor light illuminance information acquisition unit 25, respectively. In step S4, the slat angle and the ambient illumination of the electric blind 11 are set so that the acquired outdoor light integrated value and the indoor light integrated value become the target ratios stored in the control logic database 26. 12 illuminance is controlled.

  Furthermore, in step S5, the slat angle of the electric blind 11 and the ambient illumination are set so that the illuminance information from the indoor light illuminometer 14 satisfies the predetermined minimum indoor light illuminance target value while maintaining the ratio between the outdoor light and the indoor light. 12 illuminance is adjusted. Accordingly, in step S6, it is determined whether or not the room light illuminance exceeds the minimum indoor light illuminance target value. If it exceeds, the state is maintained in step S7 and the process returns to step S1, and the control logic database is periodically updated. 26 is referred to.

  On the other hand, when the room light illuminance is smaller than the minimum indoor light illuminance target value in step S6, the task illumination 13 is controlled in step S8 so that the indoor light illuminance satisfies the minimum indoor light illuminance target value. At this time, the ratio between the indoor light illuminance and the outdoor light illuminance may be outside the control logic range. Thereafter, the state is maintained in step S9, and the process returns to step S1.

  By configuring in this way, in order to achieve the desired lighting with energy saving by incorporating outdoor light, the integrated value of outdoor light and the integrated value of indoor light are approximately constant at a predetermined ratio for each time zone. Therefore, even if the outdoor light shines strongly from a low angle, the light that actually enters the room through the window 1 is adjusted so as to have the predetermined ratio in the electric blind 11, and the ambient illumination 12 In combination with the illuminance adjustment, the outdoor light and the indoor light can be dynamically mixed with good balance. As a result, illumination that incorporates outdoor light can be appropriately performed.

  In addition, when adjustment is made so that the illuminance of the indoor light by the ambient illumination 12 and the illuminance of the outdoor light from the window 1 become substantially constant, if the desired target illuminance cannot be maintained, the illuminance of the indoor light Since the illuminance of the ambient light 12 is controlled so as to maintain the target illuminance, the minimum illuminance necessary for work can be maintained even when the outdoor environment becomes dark due to rain or the like. Furthermore, when the minimum illuminance cannot be maintained even by illuminance control in conjunction with the electric blind 11 of the ambient illumination 12, the overall illumination by the ambient illumination 12 is not increased, but the task illumination 13 is locally illuminated. Further energy saving can be achieved.

  In the above description, the ambient lighting 12 and the task lighting 13 are used together as the lighting fixture, but only one of them may be used. Further, the task lighting 13 may be lit only for the occupants, and the shortage may be compensated by the ambient lighting 12, and it is easy to preset these distribution methods as control logic.

It is a figure which shows the whole structure of the illumination system which concerns on one Embodiment of this invention. It is a block diagram which shows an example of the electric constitution of the control apparatus in the illumination system shown in FIG. It is a flowchart for demonstrating an example of the concrete control logic by the lighting system of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Window 2 Room 3 Desk 11 Electric blind 12 Ambient illumination 13 Task illumination 14 Outdoor light illuminance meter 15 Indoor light illuminance meter 16 Control apparatus 21 Blind slat control part 22 Ambient illumination control part 23 Task illumination control part 24 Outdoor light illuminance information acquisition part 25 Indoor light illuminance Information acquisition unit 26 Control logic database 27 Control determination unit 28 Clock

Claims (3)

In a lighting system installed in a room with windows,
Outdoor light control means for controlling the incidence of outdoor light from the window;
Lighting fixtures that can adjust the illuminance to illuminate the room,
An outdoor light illuminometer that measures the illuminance of outdoor light,
An indoor light illuminometer that measures the illuminance of indoor light by the lighting fixture;
The illuminance of the lighting fixture and the incident light level in the outdoor light control means are adjusted so that the integrated values of illuminance respectively measured by the outdoor light illuminance meter and the indoor light illuminance meter are substantially constant at a predetermined ratio for each time zone. And an illumination system.   When the illuminance of the luminaire becomes lower than a predetermined target illuminance as a result of adjusting the illuminance of the luminaire and the incident light level in the outdoor light control means, the control means sets the illuminance of the luminaire to the target illuminance. The lighting system according to claim 1, wherein the control is performed so as to maintain the current level.   The lighting fixture includes a local lighting fixture that illuminates a work surface and an overall lighting fixture that illuminates the entire room, and the indoor illuminometer measures the illuminance of the work surface, and the control means The illumination system according to claim 2, wherein when the illuminance of the room light becomes lower than a predetermined target illuminance, the illuminance of the local lighting fixture is increased.

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