JP2014229455A - Illumination controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination control system which allows for individual dimming control, while simplifying the setting.SOLUTION: An illumination control system 200 performing the dimming control of a plurality of illumination control groups based on a demand control instruction includes a fixture management information storage unit 110 for storing, in a storage device, fixture management information 111 setting the control object information, indicating whether or not each illumination control group 20 is subjected to dimming control, and an illumination control unit 120 for calculating the range of reduction of the dimming rate during the dimming control based on the demand control instruction, extracting a dimming object group from a plurality of illumination control groups based on the control object information of the fixture management information 111, and performing dimming control for lowering the dimming rate of the dimming object group thus extracted.

Description

  The present invention relates to an illumination control device that controls dimming of a plurality of illumination devices. In particular, the present invention relates to a lighting control device that performs dimming control during demand control.

In the conventional demand control technology for lighting, the power monitoring system reports the demand monitoring level, and the lighting control system that receives the notification monitors the lighting fixture group set in the lighting control panel according to the notified demand monitoring level. There are things that are lit at a dimming rate of.
In addition, there is a technique of gradually decreasing the output over a long time in order to alleviate the uncomfortable feeling caused by the decrease in the output of the lighting device in a short time due to demand control (see Patent Document 1).

JP 2009-240050 A

In the prior art, the dimming rate at the time of demand control is individually set for each of a plurality of lighting control groups, but there is a problem that the setting becomes complicated and the load at the time of dimming control becomes high.
It is an object of the present invention to provide an illumination control apparatus that can set a uniform reduced dimming rate to simplify the setting and also perform individual dimming control.

  A lighting control device according to the present invention is connected to a plurality of lighting fixtures and connected to a demand control device that executes demand control of the plurality of lighting fixtures, receives a demand control instruction from the demand control device, and receives the demand control instruction. In the lighting control device that performs dimming control of the plurality of lighting fixtures based on the demand control instruction, a control target indicating whether or not each lighting fixture of the plurality of lighting fixtures is to be a target of the dimming control An appliance management information storage unit for storing appliance management information in which information is set, and a reduction rate of the dimming rate during the dimming control based on the demand control instruction, and the appliance management information storage unit The lighting fixture subject to the dimming control from the plurality of lighting fixtures based on the control target information of the fixture management information stored by the dimming target lighting Extracted as ingredients, characterized in that it comprises a lighting control unit for a dimming ratio lowers the lower width of the dimming object lighting device as said dimming control.

  According to one aspect of the present invention, an appliance management information storage unit that stores appliance management information in which control target information indicating whether or not to perform dimming control is set for each lighting fixture of a plurality of lighting fixtures. Because it is provided, the amount of dimming rate to be calculated during demand control can be reduced by one, and dimming control for individual lighting fixtures can be performed, and individual dimming control can be performed with simple settings. There is an effect that can be.

It is a block block diagram which shows an example of the illumination control system 200 of Embodiment 1. FIG. It is a block block diagram which shows the other example of the illumination control system 200 of Embodiment 1. FIG. It is a figure which shows an example of the appliance management information 111 which concerns on Embodiment 1. FIG. 6 is a diagram illustrating an example of dimming control by a controller 100 according to Embodiment 1. FIG. It is a figure which shows an example of the appliance management information 111 which concerns on Embodiment 2. FIG. 6 is a diagram illustrating an example of dimming control by a controller 100 according to Embodiment 2. FIG. It is a figure which shows an example of the appliance management information 111 which concerns on Embodiment 3. FIG. It is a figure which shows an example of the light control at the time of the demand control cancellation | release by the controller 100 which concerns on Embodiment 3. FIG. It is a figure which shows an example of the appliance management information 111 which concerns on Embodiment 4. FIG.

Embodiment 1 FIG.
FIG. 1 is a block configuration diagram illustrating an example of a lighting control system 200 according to the present embodiment. FIG. 2 is a block configuration diagram illustrating another example of the illumination control system 200 according to the present embodiment.
First, the illumination control system 200 shown in FIG. 1 will be described.
The lighting control system 200 includes a controller 100, at least one lighting control group 20, a wireless remote controller 7, and a PC setting device 8. The illumination control system 200 is connected to the host system 30 by wired serial communication.

The host system 30 includes a central management device 10 that includes a personal computer and a liquid crystal screen and performs batch control, and a lighting control system 200 below the controller 100 and a gateway 9 that converts signals between the central management device 10. The gateway 9 and the central management apparatus 10 are connected by Ethernet (registered trademark) or the like.
The host system 30 is connected to the power measuring device 11 that measures the power amount of the facility and notifies the central management device 10 of the current power usage amount by Ethernet (registered trademark) or the like. The central management device 10 inputs the current power usage amount from the power measurement device 11, and when the power usage amount reaches a predetermined value, the dimming rate of the lighting device 3 with respect to the controller 100. It is a demand control apparatus which transmits the light control instruction which instruct | indicates control of this.
The central management apparatus 10 collectively controls and monitors the state of the system below the controller 100 connected to the host system 30 and is connected to other facilities by a BACnet (registered trademark) (Building Automation and Control Networking protocol) or the like. The equipment is linked and controlled.
The power measuring device 11 is connected to the lighting control system 200 via the BACnet (registered trademark), and transmits the current power usage data of the facility to the central management device 10.
The central management apparatus 10 is also connected to facilities other than the lighting control system 200, and can be controlled in conjunction with, for example, air conditioning facilities, entrance / exit management, and security facilities. The power measuring device 11 is connected to the central management device 10 with a BACnet (registered trademark) or the like, for example, constantly monitoring the power consumption of the entire building or a part of the building, and when the peak value of the preset power amount is reached, The information is transmitted to the central management device 10.

For example, one illumination control group 20 is arranged in one area. However, a plurality of lighting control groups may be arranged in one area. In the present embodiment, it is assumed that the lighting control groups 20a and 20b are connected to the controller 100.
The illumination control group 20a includes devices such as the communication unit 2, the illumination device 3, the human sensor 4, the illuminance sensor 5, and the wall switch 6. The lighting control group 20b includes devices such as the communication unit 2, the plurality of lighting devices 3, and the wall switch 6.
Thus, the lighting control group 20 includes at least the communication unit 2 and the lighting device 3 and is arranged in the area.
The lighting control group 20 may be able to arbitrarily group individual appliances regardless of wiring, for example, in grouping each appliance (each device) belonging to the own group. In this case, the lighting control group 20 can be grouped by arbitrarily combining the respective devices such as the lighting device 3, the human sensor 4, the illuminance sensor 5, and the wall switch 6 connected to other communication units 2. The group information of the combination is managed in the database of the controller 100. Thereby, about the lighting control group 20 used by demand control, it becomes possible to change a setting arbitrarily irrespective of wiring.

  The controller 100 is connected to the communication unit 2 by wired communication or wireless communication, and manages settings and control states of devices located below the communication unit 2. The controller 100 controls the blinking and dimming state of the lighting device 3 according to, for example, the operation of the wall switch 6, the detection by the human sensor 4, the illuminance value monitored by the illuminance sensor 5, and the like.

The communication unit 2 communicates with the controller 1 by a wireless signal or a wired signal. The communication unit 2 is connected to the lighting device 3, the human sensor 4, the illuminance sensor 5, the wall switch 6 and the like by bidirectional two-wire wired serial signals, and has a gateway function for upper communication and lower communication.
The illumination device 3 has an LED light source and a lighting circuit that turns on the LED light source, and illuminates the area. It is turned on / off or dimmed according to the data of the dimming signal line transmitted from the communication unit 2.
The human sensor 4 is connected to the communication unit 2 by wired communication, detects the presence / absence of a person in the area, and notifies the controller 100 of the detection information.
The illuminance sensor 5 is connected to the communication unit 2 by wired communication, detects the illuminance value on the desk surface, and notifies the controller 100 of the illuminance value information.
The wall switch 6 is connected to the communication unit 2 by wired communication, and notifies the controller 100 of pressing information when a button is pressed.

The wireless remote controller 7 communicates with the controller 100 and the communication unit 2 by wireless communication, and performs dimming control, status monitoring, data setting, and the like of the lighting device 3.
A PC (personal computer) setting device 8 communicates with the controller 100 and the communication unit 2 by wireless communication or wired communication, and performs dimming control, status monitoring, data setting, and the like of the lighting device 3 from the personal computer screen.

  As described above, the lighting device 3, the human sensor 4, the illuminance sensor 5, and the wall switch 6 are each configured such that one device is connected to one communication unit 2 (for example, the lighting control group 20a in FIG. 1). ), Or a plurality of lighting devices 3 connected to one communication unit 2 (for example, the lighting control group 20b in FIG. 1), and the lighting control group 20 according to the aspect of the lighting control system 200 to be constructed. The overall configuration of each is determined.

  Further, as shown in FIG. 2, the function of the communication unit 2 is mounted on the controller 100, and the controller 100 and the lighting device 3, the human sensor 4, the illuminance sensor 5, and the wall switch 6 are directly connected without the communication unit 2. It may be configured to communicate.

Next, the function of the controller 100 (lighting control device) will be described in detail.
The controller 100 is connected to a plurality of lighting control groups 20 (lighting fixtures) and is connected to a host system 30 (demand control device) that performs demand control of the plurality of lighting control groups 20. A demand control level (demand control instruction) is received from the host system 30, and dimming control of the plurality of lighting control groups 20 is performed based on the received demand control level.
The controller 1 (lighting control device) includes an appliance management information storage unit 110 and a lighting control unit 120.
The appliance management information storage unit 110 stores appliance management information 111 in which control target information indicating whether or not each of the plurality of lighting control groups 20 (lighting fixtures) is to be a dimming control target during demand control is set. Store in the device.
The lighting control unit 120 calculates a reduction range of the dimming rate at the time of dimming control based on the demand control level (hereinafter referred to as a reduced dimming rate), and a plurality of lighting control groups based on the appliance management information 111 Dimming rate of the lighting control group 20 extracted as the dimming target group (dimming target lighting fixture) from the lighting control group 20 that is the target of dimming control from 20 (lighting fixture) The control is performed to lower the light control rate by a reduced amount.

Next, an operation during demand control in the lighting control system 200 will be described.
As described above, the power measurement device 11 constantly monitors the power consumption of the entire building or a part of the building, and transmits the information to the central management device 10 when the peak value of the preset power consumption is reached. The central management apparatus 10 temporarily notifies each facility of the demand control level in order to reduce the amount of power.
When the lighting control unit 120 of the controller 100 of the lighting control system 200 receives the demand control level, the lighting control unit 120 of each lighting control group 20 reduces the dimming rate uniformly by a certain amount according to the received demand control level. The dimming rate for reducing the brightness is calculated. Usually, the lighting control unit 120 transmits a dimming rate change instruction based on the calculated reduced dimming rate to each lighting control group 20, temporarily reducing the dimming rate of the entire lighting control system 200, and using it. Reduce power consumption. The dimming rate change instruction used here is, for example, the dimming rate realized when each lighting fixture is turned on, using the target dimming rate controlled during normal times, and is turned off as usual during the extinction control. Suppose you are.

At this time, the controller 100 may receive a demand control level from the central management device 10 as a signal, or may receive a value of the dimming rate to be reduced as a signal. The controller 100 that has received the demand control level refers to, for example, a reduced dimming rate corresponding to each demand control level set in advance, and sets the dimming rate by subtracting the reduced dimming rate from the current dimming rate. To send a dimming rate change instruction. When the controller 100 receives the value of the dimming rate to be reduced from the central management device 10 as a signal, the controller 100 uses the value as the reduced dimming rate and performs dimming in the same manner as when receiving the demand control level. Send rate change instructions.
In addition, here, the controller 100 performs dimming control of the lighting device 3 for each lighting control group 20, but the lighting device 3 may be managed individually. That is, the controller 100 can be managed as a group (lighting control group 20) as an aggregate of a plurality of lighting devices 3, or can be managed as individual lighting devices 3. Therefore, the dimming rate change instruction can be individually or Can be sent to either group.

FIG. 3 is a diagram showing an example of the appliance management information 111 according to the present embodiment.
As shown in FIG. 3, the appliance management information 111 stored in the appliance management information storage unit 110 has a target dimming rate and demand control (dimming control during demand control) for the lighting control group number. Information (control target information) whether or not it is valid is associated. Although not shown, it is assumed that the individual address of the communication unit of the lighting control group corresponding to the lighting control group number is also set. The lighting control group number is a number that individually identifies the lighting control group 20. As described above, when managing as individual lighting devices 3, the appliance management information 111 may be set using an identifier or device address that individually identifies the lighting devices 3.

The lighting control unit 120 of the controller 100 converts the lighting control group 20 that is the target of the dimming control from the plurality of lighting control groups 20 (lighting fixtures) based on the fixture management information 111 to the dimming target group (the dimming target). Judgment as lighting equipment). The lighting control unit 120 transmits a dimming change instruction to the communication unit 2 of the lighting control group 20 determined as the dimming target group.
In demand control, the dimming rate is usually reduced with a uniform change amount for all the lighting control groups 20, but the above-described processing of the lighting control unit 120 causes demand control to be performed in advance depending on the usage state of the lighting fixture. Effective lighting fixtures or groups and lighting fixtures or groups for which demand control is disabled can be arbitrarily set. For example, only lighting fixtures in environments where it is not desired to constantly reduce the dimming rate can be excluded from the demand control range. .

FIG. 4 is a diagram illustrating an example of dimming control by the controller 100 according to the present embodiment.
FIG. 4 shows an example of dimming control during demand control when the appliance management information 111 is in the state shown in FIG.
The lighting control unit 120 that has received the demand control level determines that the dimming rate is 20% based on the demand signal level. The illumination control unit 120 refers to the appliance management information 111 and determines that the illumination control group numbers (1) and (2) that are set to enable demand control in advance are control target groups. The illumination control unit 120 controls the dimming rate from the current dimming rate to the reduced dimming rate “−20%” for the lighting control groups (1) and (2) corresponding to the lighting control group numbers (1) and (2). Although the change instruction is transmitted, the dimming rate change instruction is not transmitted to the lighting control group (3) set to disable demand control. Thus, the lighting control group (1) is dimmed at a dimming rate of 35%, the lighting control group (2) is dimmed at a rate of 30%, and the lighting control group (3) is dimmed at a dimming rate of 50%. To do.

  Further, in the controller 100 according to the present embodiment, the individual address and group number of each lighting fixture (lighting control group) are stored in the database to be held, and the demand control valid / invalid information of each lighting fixture is further stored. From this database, the controller 100 determines, for each lighting fixture, whether or not to reduce the dimming rate during demand control, and issues a dimming rate change instruction only to lighting fixtures for which demand control is enabled. The dimming command is not transmitted to the lighting fixture. With this method, dimming control by demand control can be validated only for an arbitrary lighting fixture.

Embodiment 2. FIG.
In the present embodiment, parts different from those of the first embodiment will be mainly described. The same functional configuration as that described in Embodiment 1 is denoted by the same reference numeral, and the description thereof may be omitted.

In the first embodiment, the controller 100 that can set the validity / invalidity of demand control for each lighting control group has been described.
In the present embodiment, for example, when the current dimming rate is low due to the reduced dimming rate by the demand control when the current dimming rate that is lit in advance is low, the dimming rate is 0%, that is, the extinction control is performed. A description will be given of a case in which the control is performed at the lower limit without turning off the light by setting the lower limit dimming rate by demand control in advance.

FIG. 5 is a diagram showing an example of the appliance management information 111 according to the present embodiment. FIG. 6 is a diagram illustrating an example of dimming control by the controller 100 according to the present embodiment.
As shown in FIG. 5, the appliance management information 111 sets the dimming rate when the reduced dimming rate is larger than the dimming rate before the dimming control for each lighting control group 20 to the lower limit dimming rate. Set as light rate.
When the current dimming rate (target dimming rate) of the dimming target group is smaller than the reduced dimming rate, the illumination control unit 120 controls the dimming target group according to the lower limit dimming rate set in the appliance management information 111. The lighting device 3 is dimmed.

  As shown in FIG. 5, in the appliance management information 111, in addition to the demand control valid / invalid data (control target information) of each lighting control group, the lower limit dimming rate at the time of demand control is also stored. If the lower limit dimming rate is set to 0%, it will turn off if the current dimming rate becomes negative due to dimming by demand control, but the lower limit dimming rate is a value other than 0% such as 25%. If it is set to, it can be set so as not to fall below the lower limit dimming rate, and control that does not turn off is possible.

FIG. 6 illustrates a case where the reduced dimming rate is “−60%” depending on the demand control level.
The lighting control unit 120 that has received the demand control level determines that the dimming rate is 60% based on the demand signal level. The illumination control unit 120 refers to the appliance management information 111 and determines that the illumination control group numbers (1) and (2) that are set to enable demand control in advance are control target groups.
The illumination control unit 120 compares the target dimming rate with the reduced dimming rate. For the lighting control group numbers (1) and (2), the illumination control unit 120 refers to the demand lower limit dimming rate because the target dimming rate is smaller than the reduced dimming rate.
For the lighting control group number (1), the lighting control unit 120 controls the dimming rate for the communication unit 2 of the lighting control group (1) corresponding to the lighting control group number (1) according to the lower limit dimming rate of 0%. A dimming rate change instruction of 0% (that is, extinguishing) is transmitted. For the lighting control group number (2), the lighting control unit 120 controls the dimming rate for the communication unit 2 of the lighting control group (2) corresponding to the lighting control group number (2) according to the lower limit dimming rate of 25%. A dimming rate change instruction of 25% is transmitted.

  As described above, according to the controller 100 according to the present embodiment, when the dimming amount of the dimming rate indicated by the demand control signal is larger than the dimming rate of the lighting fixture before receiving the demand control signal. It is possible to set the controller in advance whether to turn off the luminaire or turn it on at the lower limit dimming rate set without turning off the luminaire, and the luminaire in the area that does not want to be turned off even during demand control The dimming control can be performed such that the demand control is not performed but the lamp is not turned off.

Embodiment 3 FIG.
In the present embodiment, parts different from the first and second embodiments will be mainly described. The same functional configuration as that described in the first and second embodiments is denoted by the same reference numeral, and the description thereof may be omitted.

In the first and second embodiments, at the time of demand control, for each lighting control group 20 (lighting fixture or group), lighting capable of setting whether to enable / disable demand control and turn off / off by setting the lower limit dimming rate The control system 200 has been described.
In the present embodiment, when there is a lighting control group 20 that is turned off during demand control in some of the lighting control groups 20, when the demand control is released, the turned off lighting control group 20 is replaced with the one before the demand control. A description will be given of the controller 100 capable of setting in advance whether to return to the state and turn on the light, or to maintain the lighted state without returning.
It is desirable for the lighting fixtures that have been dimmed by demand control to return to the dimming rate before demand control when demand control is canceled, but there are lighting fixtures that are turned off by the demand control (dimming rate 0%). When returning to the lit state, for example, in a closed space such as a conference room, the user is absent while the demand control is turned off, and when demand control is canceled during the absence, the place where the user cannot touch Since the lighting fixtures are turned on and the user may not be aware of this, the lighting state may continue. Therefore, as a function to prevent forgetting to turn off, set whether to turn on or off after demand control is released. It is possible to control according to.

FIG. 7 is a diagram showing an example of the appliance management information 111 according to the present embodiment. FIG. 8 is a diagram illustrating an example of dimming control when demand control is released by the controller 100 according to the present embodiment.
In the appliance management information 111, when the dimming control (the dimming control at the time of demand control) is released for each lighting control group 20, the lighting device 3 of the lighting control group 20 is turned off by demand control. In this case, information at the time of release indicating whether or not to turn off the lighting device 3 of the lighting control group 20 is set.
When the lighting control unit 120 receives a demand control release instruction from the central management device 10 (demand control device), whether or not the lighting control group 20 that is a dimming target group under dimming control by demand control is turned off. If it is turned off, it is determined whether or not the lighting control group 20 is to be turned off based on the release time information of the appliance management information 111.
As described above, the appliance management information 111 includes the target dimming rate for each lighting control group 20, valid / invalid of demand control, the lower limit dimming rate during demand control, and valid / invalid of the lighting operation after canceling demand control. The controller 100 stores the invalidity. The lighting control unit 120 determines the dimming rate command content for each lighting fixture based on this database when demand control is performed or canceled.

As shown in FIG. 8, when both of the lighting control groups (1), (2), and (3) are turned off by the demand control signal, the dimming rate before the demand control (target dimming rate) is detected by the demand control release signal. A command to return to) is transmitted.
As shown in FIG. 7, in the appliance management information 111, it is assumed that the lighting control groups (1) and (2) are previously set to enable demand release lighting. The lighting control unit 120 determines from the appliance management information 111 that the demand control lighting is effective for the lighting control groups (1) and (2).
The lighting control unit 120 returns the lighting control group (1) to the dimming rate 55% (target dimming rate), and the lighting control group (2) returns to the dimming rate 50% (target dimming rate). Since the demand control itself is invalid, the lighting control group (3) is not controlled by the lighting control unit 120 according to the present embodiment. For example, when the lighting control group (3) is effective for demand control itself, is turned off by demand control, and the demand release lighting is invalid, the lighting control unit 120 turns off the lighting control group (3). To maintain.

  As described above, according to the controller 100 according to the present embodiment, the lighting apparatus that has been turned off by demand control is turned on by returning to the dimming rate before demand control when the demand control is released, or the turned off state is maintained. It is possible to set in advance.

Embodiment 4 FIG.
In the present embodiment, parts different from the first to third embodiments will be mainly described. The same functional configuration as that described in Embodiments 1 to 3 is denoted by the same reference numeral, and the description thereof may be omitted.

  The controller 100 which concerns on this Embodiment is provided with the appliance management information 111 which can change each setting content with a time slot | zone for every illumination control group. Thereby, the illumination control part 120 can select arbitrary operation | movement content with respect to each illumination control group 20 for every time slot | zone.

FIG. 9 is a diagram showing an example of the appliance management information 111 according to the present embodiment.
The appliance management information 111 sets control target information, a lower limit dimming rate, and release-time information for each lighting control group 20 for each of a plurality of time zones. As a result, in the daily schedule, for example, the operation when demand control is executed is divided into time zones such as morning, lunch break, afternoon, evening, night, etc., and stored in the database in advance. The operation of the illumination control unit 120 can be changed for each time period by the clock function.
When the lighting control unit 120 starts dimming control by demand control or receives a demand control release instruction, the illumination control unit 120 acquires the current time, and is set to a time zone corresponding to the acquired current time. Based on the target information, the lower limit dimming rate, or the release time information, the dimming control of the lighting devices 3 of each lighting control group is executed.

  As described above, according to the controller 100 according to the present embodiment, the variation of the setting value that determines the operation at the time of demand control or release of each lighting control group is scheduled in advance and stored in the appliance management information 111. Thus, it is possible to finely select an operation when demand control is executed in each time zone.

  As described above, according to the illumination control system 200 according to the above-described embodiment, by setting a uniform reduced dimming rate, the setting is simplified, and in addition, the lower limit dimming rate is set. Priorities such as whether or not to turn off can be set individually. In addition, since the presence or absence of lighting at the time of release can be individually set, control according to the application such as prevention of forgetting to turn off becomes possible.

  As mentioned above, although Embodiment 1-4 of this invention was demonstrated, you may implement combining these 2 or more among these embodiments. Alternatively, one of these embodiments may be partially implemented. Alternatively, two or more of these embodiments may be partially combined. In addition, this invention is not limited to these embodiment, A various change is possible as needed.

  2 communication unit, 3 lighting device, 4 human sensor, 5 illumination sensor, 6 wall switch, 7 wireless remote control, 8 PC setting device, 9 gateway, 10 central management device, 20 lighting control group, 11 power measurement device, 100 controller 110 appliance management information storage unit, 111 appliance management information, 120 illumination control unit, 200 illumination control system.

Claims (4)

A demand control device that is connected to a plurality of lighting fixtures and that performs demand control of the plurality of lighting fixtures, receives a demand control instruction from the demand control device, and is based on the received demand control instruction In a lighting control device that performs dimming control of a plurality of lighting fixtures,
For each lighting fixture of the plurality of lighting fixtures, an appliance management information storage unit that stores appliance management information in which control target information indicating whether or not the light control is set is stored in a storage device;
Based on the demand control instruction, the amount of decrease in the dimming rate at the time of the dimming control is calculated, and the plurality of illuminations are based on the control target information of the appliance management information stored by the appliance management information storage unit A lighting control unit that extracts a lighting fixture subject to the dimming control from a fixture as a lighting control target lighting fixture, and reduces the dimming rate of the lighting control target lighting fixture by the amount of decrease as the dimming control; An illumination control device comprising: The appliance management information storage unit
For each lighting fixture of the plurality of lighting fixtures, the fixture management information with the dimming rate of the lighting fixture as the lower limit dimming rate when the lowering width is larger than the dimming rate before performing the dimming control Further set to
The illumination control unit
When the current dimming rate of the dimming target lighting fixture is smaller than the decrease width, the dimming target lighting fixture is dimmed according to the lower limit dimming rate set in the fixture management information. The lighting control device according to claim 1. The appliance management information storage unit
For each lighting fixture of the plurality of lighting fixtures, when the lighting fixture is turned off when the dimming control is released, the release time information indicating whether or not the lighting fixture is to be turned off is displayed. Set further management information,
The illumination control unit
When receiving a demand control release instruction from the demand control device, it is determined whether or not the dimming target lighting fixture is turned off, and when the dimming target lighting fixture is turned off, the fixture management information The lighting control device according to claim 2, wherein it is determined whether or not the dimming target lighting fixture is to be turned off based on the release time information. The appliance management information storage unit
For each lighting fixture of the plurality of lighting fixtures, for each time zone of a plurality of time zones, set the control target information, the lower limit dimming rate and the release time information in the fixture management information,
The illumination control unit
When the dimming control is started or when the demand control release instruction is received, the current time is acquired, and the control target information set in the time zone corresponding to the acquired current time, the lower limit control The lighting control device according to claim 3, wherein the dimming control of the dimming target lighting fixture is executed based on a light rate or the release time information.

Images