JP7656815B2 - Equipment Control System - Google Patents

Description

The present invention relates to a device control system based on PoE (Power over Ethernet (registered trademark)).

PoE is a technology that allows a power supply device to send and receive data to and supply power to a power receiving device in parallel through a standard cable that complies with the Ethernet (registered trademark) standard. Using PoE, it is possible to install power receiving devices in places where it is difficult to secure a power source, and it is also possible to reduce the costs associated with power wiring. In recent years, the amount of power that can be supplied by PoE has increased, and the range of devices that can be used as power receiving devices is expanding. Patent Document 1 discloses technology related to PoE.

Patent No. 6693002

When power is supplied from a power supply device to a power receiving device in PoE, a battery is used to supply power to the power supply device during a power outage in order to shorten the time it takes for the power receiving device to recover and to correct variations in the timing at which the power receiving device recovers. However, there is an issue with the large battery capacity required.

The present invention provides an equipment control system that can reduce the required capacity of the battery that supplies power to the power supply equipment during a power outage.

The device control system according to one aspect of the present invention includes a plurality of power receiving devices, a power supply device having a plurality of connection ports and supplying power to the plurality of power receiving devices through the plurality of connection ports, and a battery device that supplies power to the power supply device when a power source is interrupted, and the power supply device reduces the number of the power receiving devices to which the power supply device supplies power when a power source is interrupted from the number of the power receiving devices to which the power supply device supplies power under normal circumstances.

The device control system of the present invention can reduce the required capacity of the battery that supplies power to the power supply device during a power outage.

FIG. 1 is a block diagram showing a functional configuration of a device control system according to an embodiment. FIG. 2 is a flowchart of an example of the operation of the device control system according to the embodiment. FIG. 3 is a flowchart showing the operation of the control unit 22 to determine whether or not a power interruption has occurred. FIG. 4 is a flowchart showing an example of an operation of selecting a power receiving device based on device information in the device control system according to the embodiment. FIG. 5 is a flowchart showing an example of an operation of selecting a power receiving device based on the priority order in the device control system according to the embodiment. FIG. 6 is a flowchart showing the operation of changing the dimming level of the power receiving device depending on the remaining charge level of the battery device. FIG. 7 is a flowchart showing the operation of changing the dimming level of the power receiving device depending on the power cut-off time. FIG. 8 is a flowchart showing the operation of changing the number of power receiving devices depending on the remaining charge of the battery device. FIG. 9 is a flowchart showing the operation of changing the number of power receiving devices depending on the power cut-off time.

The following describes the embodiments in detail with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, component placement and connection forms, steps, and order of steps shown in the following embodiments are merely examples and are not intended to limit the present invention. Furthermore, among the components in the following embodiments, components that are not described in an independent claim are described as optional components.

Note that each figure is a schematic diagram and is not necessarily a precise illustration. In addition, in each figure, the same reference numerals are used for substantially the same configurations, and duplicate explanations may be omitted or simplified.

(Embodiment 1)
[composition]
First, an overview of a device control system according to an embodiment will be described with reference to Fig. 1. Fig. 1 is a block diagram showing a functional configuration of a device control system according to an embodiment.

The device control system 10 according to the embodiment is a PoE system (a PoE-based system) that uses the PoE mechanism to control target devices. The device control system 10 includes a power supply device 20 (PSE: Power Sourcing Equipment), one or more power receiving devices (PD: Powered Devices), and a battery device 90. The power receiving devices are devices that have a PD interface, and in FIG. 1, the lighting device 30, the disaster prevention device 40, the camera 50, and the air conditioning device 60 each correspond to a power receiving device. The power receiving devices may be audio devices (speakers), video devices, wireless devices, sensors, user interface devices, or the like.

The power supply device 20 includes a plurality of connection ports 21, a control unit 22, a storage unit 23, and a detection unit 24. The plurality of connection ports 21 are connection structures (connectors) to which standard cables 70 conforming to the Ethernet (registered trademark) standard are connected. Specifically, the standard cables 70 are so-called LAN (Local Area Network) cables. The connection ports 21 are electrically connected to the power receiving devices via the standard cables 70. The power receiving devices (lighting devices 30, disaster prevention devices 40, cameras 50, and air conditioning devices 60) receive power from the power supply device 20 via the standard cables 70, and can communicate with the power supply device 20 via the standard cables 70.

The control unit 22 supplies power to the power receiving device connected to the connection port 21. The control unit 22 also controls the power receiving device connected to the connection port 21 by sending a control signal to the power receiving device via the standard cable 70. Specifically, the control unit 22 is realized by a microcomputer or a processor, and is built into the power supply device 20. The functions of the control unit 22 are realized, for example, by the microcomputer or processor constituting the control unit 22 executing a computer program stored in the memory unit 23.

The storage unit 23 is a storage device that stores the computer program and various information necessary for controlling the power receiving device. The storage unit 23 is realized, for example, by a semiconductor memory.

The detection unit 24 detects whether the power supplied to the power supply device 20 is DC power or AC power.

The lighting device 30 operates by receiving power supply from the power supply device 20. The lighting device 30 is, for example, a lighting device that illuminates an indoor space, and more specifically, is a base light, a system ceiling light, a downlight, a spotlight, or an emergency light. The specific form of the lighting device 30 is not particularly limited. The device control system 10 includes one lighting device 30, but may include two or more lighting devices 30. The lighting device 30 includes a light-emitting element 31 and a light-emission control unit 32.

The light-emitting element 31 constitutes the light source of the lighting device 30. The light-emitting element 31 is, for example, an LED (Light Emitting Diode) or an organic EL (Electro Luminescence).

The light emission control unit 32 converts the power supplied from the power supply device 20 into power suitable for the light emission of the light emitting element 31, and supplies the converted power to the light emitting element 31. Specifically, the light emission control unit 32 applies a voltage to the light emitting element 31. The light emission control unit 32 is realized by a DC-DC converter circuit or the like.

The disaster prevention device 40 includes a sensor 41 and a detection control unit 42. The detection control unit 42 is a processor that operates by receiving power supply from the power supply device 20. The detection control unit 42 may include a communication circuit. The detection control unit 42 receives a signal from the power supply device 20 and operates based on the received signal. The sensor 41 also transmits the detected signal to the detection control unit 42. The detection control unit 42 performs an operation to detect an object through the sensor 41. The detection control unit 42 may communicate with the power supply device 20.

The camera 50 includes an image sensor 51 and an image control unit 52. The image sensor 51 converts light into an electrical signal through photoelectric conversion due to the photoelectric effect, thereby converting the image into an electrical signal. The image control unit 52 is a processor that operates by receiving power from the power supply device 20. The image control unit 52 may include a communication circuit. The image control unit 52 receives a signal from the power supply device 20 and operates based on the received signal. The image control unit 52 captures an image of a target through the image sensor 51. The image control unit 52 may communicate with the power supply device 20.

The air conditioning equipment 60 includes an air conditioning control unit 62 and a heat exchanger 61. The heat exchanger 61 removes heat or cold from the outside air by bringing the taken-in air into contact with a refrigerant, generating air with regulated temperature and humidity. The air conditioning control unit 62 is a processor that operates by receiving power from the power supply equipment 20. The air conditioning control unit 62 may include a communication circuit. The air conditioning control unit 62 receives a signal from the power supply equipment 20 and operates based on the received signal. The air conditioning control unit 62 generates air with regulated temperature and humidity through the heat exchanger 61. The air conditioning control unit 62 may communicate with the power supply equipment 20.

The battery device 90 includes a battery 91, a discharge control unit 92, and a battery detection unit 93. The battery 91 is a secondary battery that is charged and used. The battery 91 is, for example, a lithium ion battery, but may be a nickel-metal hydride battery. The battery 91 includes electrodes and an active material. The battery 91 may include an electrolyte instead of the active material. The discharge control unit 92 controls the supply of power to the power supply device 20 when the power supply is cut off. The battery detection unit 93 detects that the power supplied to the battery device 90 from the system power supply has been cut off.

During normal operation (when the grid power supply is not interrupted), the battery device 90 receives AC power from the grid power supply and supplies the received AC power to the power supply device 20. At the same time, the battery device 90 charges the battery 91 provided therein with the AC power received from the grid power supply.

In contrast, when the power supply is interrupted (when the system power supply is interrupted), the battery device 90 supplies the DC power that was charged in the battery 91 to the power supply device 20 by discharging the battery 91.

[Example of operation]
Next, an operation example of the device control system 10 will be described. Fig. 2 is a flowchart of an operation example of the device control system 10 according to the embodiment. In the device control system 10, the power supply device 20 supplies power to each of a plurality of power receiving devices. When a power source that supplies power to the power supply device 20 is cut off (hereinafter, referred to as power cutoff), the power supply device 20 receives power supply from the battery device 90. However, when there are many power receiving devices to which the power supply device 20 supplies power, there is a problem that the capacity of the battery device 90 must be made larger.

Therefore, in the device control system 10, the power supply device 20 reduces the number of power receiving devices to which it supplies power when the power supply is interrupted. This allows the device control system 10 to supply power to the power supply device 20 using a battery device 90 with a smaller capacity than before.

First, the power supply device 20 determines whether a power interruption has occurred (step S100). Here, a power interruption refers to a system power supply or the like that supplies power to the power supply device 20 being interrupted. For example, the power supply device 20 determines whether a power interruption has occurred as follows. The battery detection unit 93 of the battery device 90 determines whether a power interruption to the battery device 90 has occurred. When the battery detection unit 93 determines that a power interruption has occurred, the discharge control unit 92 supplies DC power to the power supply device 20 by discharging the battery 91. The detection unit 24 of the power supply device 20 detects that DC power has been supplied to the power supply device 20. When the detection unit 24 of the power supply device 20 detects that DC power has been supplied to the power supply device 20, the control unit 22 of the power supply device 20 determines that a power interruption has occurred.

Next, the power supply device 20 receives power from the battery device 90 (step S101).

Next, the control unit 22 reduces the number of power receiving devices to which power is supplied (step S102). At this time, the control unit 22 may select the lighting device 30 as the power receiving device to which power is supplied.

[Power interruption detection]
Next, the above-mentioned operation of the control unit 22 to determine whether or not a power interruption has occurred will be described with reference to a flowchart of FIG 3, which shows the operation of the control unit 22 to determine whether or not a power interruption has occurred.

When the power supply device 20 receives power, the control unit 22 performs the following operations.

First, the control unit 22 determines whether or not a direct current has been detected (step S200). That is, the control unit 22 determines whether or not the current supplied as power supply is a direct current. For example, the control unit 22 may determine whether the current supplied as power supply is a direct current or an alternating current.

When the control unit 22 determines that the current supplied with power is direct current (Yes in step S200), the control unit 22 determines that a power interruption has occurred (step S201). In other words, the control unit 22 determines that the battery device 90, not the system power supply, is supplying power to the control unit 22, and determines that the system power supply has been interrupted.

If the control unit 22 determines that the current supplied with power is not DC (No in step S200), the control unit 22 determines that a power interruption has not occurred (step S202). In other words, the control unit 22 determines that the power supply to the control unit 22 is supplied not by the battery device 90 but by the system power supply, and determines that the system power supply has not been interrupted.

For example, when a power interruption occurs, the control unit 22 may receive a power supply from the battery device 90, and may also receive a signal from the battery device 90 indicating that the battery device 90 is supplying power, and may determine that a power interruption has occurred based on the received signal. When a power interruption has not occurred, the control unit 22 may not receive a power supply from the battery device 90, and may not receive a signal from the battery device 90 indicating that the battery device 90 is supplying power, and may determine that a power interruption has not occurred based on the fact that the signal has not been received. When a power interruption has not occurred, the control unit 22 may receive a signal from the battery device 90 indicating that the battery device 90 is not supplying power, and may determine that a power interruption has not occurred based on the received signal.

[Details on selecting a power receiving device]
Next, an operation of the power supply device 20 reading the device information and supplying power to the power receiving device when the power supply is cut off will be described. Fig. 4 is a flowchart showing an example of an operation of the device control system 10 according to the embodiment for selecting a power receiving device based on the device information.

If the control unit 22 determines that a power interruption has occurred, it performs the following operations.

First, the control unit 22 reads the device information stored in each of the power receiving devices from each of the power receiving devices (step S300). Here, the device information is information indicating the power consumption of each power receiving device, etc. The control unit 22 may read the device information from the power receiving devices before the power receiving devices are started, while the power receiving devices are starting, or when the battery device 90 is starting. Here, "before the power receiving devices are started" refers to a state in which the power receiving devices are not operating but are energized. Also, "when the battery device 90 is started" refers to a state in which the battery device 90 is started and the power receiving devices are energized.

Next, the control unit 22 selects a power receiving device to which power is to be supplied in accordance with the device information (step S301). At this time, the control unit 22 selects a power receiving device such that the sum of the power consumption of the multiple power receiving devices calculated from the multiple device information is smaller than the sum of the power consumption of the power receiving devices that supplied power under normal circumstances (when no power interruption has occurred). Here, the control unit 22 may select a lighting device 30 as the power receiving device to which power is to be supplied. For example, the control unit 22 may select an emergency light that does not supply power (does not light up) when the power supply is energized and the power supply is not interrupted, as the power receiving device to which power is to be supplied when the power supply is interrupted.

Next, the operation of the control unit 22 reading the priority order and supplying power to the power receiving device when the power is cut off will be described. Figure 5 is a flowchart showing an example of the operation of selecting the power receiving device based on the priority order of the device control system 10 according to the embodiment.

If the control unit 22 determines that a power interruption has occurred, it performs the following operations.

First, the control unit 22 reads the priority stored in each of the power receiving devices from each power receiving device (step S400). Here, the priority may be a ranking assigned to the multiple power receiving devices in sequence, or a numerical value indicating the importance assigned independently to each of the multiple power receiving devices. At this time, the control unit 22 selects several power receiving devices from among the multiple power receiving devices according to the priority. (step S401) The control unit 22 may select the power receiving devices according to the priority so that the number of power receiving devices to which power is supplied during a power interruption is reduced from the number of power receiving devices to which power is supplied during normal times (when no power interruption has occurred).

[Change dimming ratio]
Next, an operation of the control unit 22 determining the remaining charge of the battery device 90 and changing the dimming level of the power receiving device when the power is cut off will be described. Fig. 6 is a flowchart showing the operation of changing the dimming level of the power receiving device depending on the remaining charge of the battery device 90.

If the control unit 22 determines that a power interruption has occurred, it performs the following operations.

First, the control unit 22 determines the remaining charge of the battery device 90 (step S500). At this time, the control unit 22 may determine whether the remaining charge of the battery device 90 is equal to or lower than a threshold value. In this case, there may be multiple threshold values, and the control unit 22 may determine the remaining charge of the battery device 90 in multiple stages.

Next, the control unit 22 changes the dimming level of the power receiving device according to the remaining charge of the battery device 90 (step S501). At this time, the power receiving device is the lighting device 30. When the remaining charge of the battery device 90 is lower than the threshold value, the control unit 22 may reduce the dimming level of the lighting device 30, which is the power receiving device, compared to normal (reduce the dimming level). When the control unit 22 determines the remaining charge of the battery device 90 in multiple stages, the control unit 22 may reduce the dimming level of the lighting device 30, which is the power receiving device, (reduce the dimming level) the lower the remaining charge becomes.

Next, the operation of the control unit 22 when the power supply is interrupted, determining the duration of the power supply interruption and changing the dimming level of the power receiving device, will be described. Figure 7 is a flowchart showing the operation of changing the dimming level of the power receiving device depending on the power supply interruption time.

If the control unit 22 determines that a power interruption has occurred, it performs the following operations.

First, the control unit 22 determines how long the power-off duration, which is the time that the power-off continues, has continued (step S600). At this time, the control unit 22 may determine whether the power-off duration is equal to or greater than a threshold value. In this case, there may be multiple threshold values, and the control unit 22 may determine the length of the power-off duration in multiple stages.

Next, the control unit 22 changes the dimming level of the power receiving device according to the length of the power cut-off time (step S601). At this time, the power receiving device is the lighting device 30. When the power cut-off time is greater than the threshold value, the control unit 22 may reduce the dimming level of the lighting device 30, which is the power receiving device, compared to normal (dimming the light). When the control unit 22 determines the length of the power cut-off time in multiple stages, the control unit 22 may reduce the dimming level of the lighting device 30, which is the power receiving device (dimming the light), the longer the power cut-off time is.

[Reduction of power receiving devices]
Next, an operation of the control unit 22 determining the remaining charge of the battery device 90 and changing the number of power receiving devices when the power is cut off will be described.

If the control unit 22 determines that a power interruption has occurred, it performs the following operations.

First, the control unit 22 determines whether the remaining charge of the battery device 90 is equal to or less than a predetermined value (step S700).

When the control unit 22 determines that the remaining charge of the battery device 90 is equal to or less than a predetermined value (Yes in step S700), the control unit 22 reduces the number of power receiving devices to which power is supplied (step S701). In this case, the control unit 22 may further reduce the number of power receiving devices to which power is supplied from the number of power receiving devices to which power was supplied that was reduced when the power was cut off.

When the control unit 22 determines that the remaining charge of the battery device 90 is not equal to or less than a predetermined value (No in step S700), the control unit 22 maintains the number of power receiving devices to which it supplies power (step S702). Here, maintaining refers to supplying power during a power interruption to the same number of power receiving devices as the number of power receiving devices to which the control unit 22 supplies power during normal times (when no power interruption has occurred). The control unit 22 may supply power during a power interruption to the same power receiving devices to which it supplies power during normal times (when no power interruption has occurred).

The control unit 22 may determine in multiple stages whether the remaining charge of the battery device 90 is equal to or less than a predetermined value, and in that case, may reduce the number of power receiving devices to which power is supplied in multiple stages according to the remaining charge of the battery device 90.

Next, we will explain the operation of the control unit 22 when the power is cut off, determining the power cut duration and changing the number of power receiving devices. Figure 9 is a flowchart showing the operation of changing the number of power receiving devices depending on the power cut duration.

If the control unit 22 determines that a power interruption has occurred, it performs the following operations.

First, the control unit 22 determines whether the power-off time is equal to or greater than a predetermined value (step S800).

When the control unit 22 determines that the power interruption time is equal to or longer than the predetermined value (Yes in step S800), the control unit 22 reduces the number of power receiving devices to which power is supplied (step S801). In this case, the control unit 22 may further reduce the number of power receiving devices to which power is supplied from the number of power receiving devices to which power was supplied that was reduced when the power was interrupted.

When the control unit 22 determines that the power interruption time is not equal to or longer than the predetermined value (No in step S800), the control unit 22 maintains the number of power receiving devices to which power is supplied (step S802). Here, maintaining refers to supplying power during a power interruption to the same number of power receiving devices as the number of power receiving devices to which the control unit 22 supplies power during normal times (when no power interruption has occurred). The control unit 22 may supply power during a power interruption to the same power receiving devices to which it supplies power during normal times (when no power interruption has occurred).

The control unit 22 may determine whether the power-off time is equal to or greater than a predetermined value in multiple stages, and in that case, may reduce the number of power receiving devices to which power is supplied in multiple stages according to the length of the power-off time.

[Effects, etc.]
The device control system 10 of the present disclosure includes a plurality of power receiving devices, a power supplying device 20 having a plurality of connection ports 21 and supplying power to the plurality of power receiving devices through the plurality of connection ports 21, and a battery device 90 that supplies power to the power supplying device 20 when the power supply is interrupted, and the power supplying device 20 reduces the number of power receiving devices to which the power supplying device 20 supplies power when the power supply is interrupted from the number of power receiving devices to which the power supplying device 20 supplies power under normal circumstances.

As a result, the device control system 10 of the present disclosure can limit the number of devices to which the power supply device 20 supplies power when the power supply is interrupted. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power supply is interrupted.

In addition, for example, in the device control system 10 of the present disclosure, at least one power receiving device to which the power supply device 20 supplies power when the power supply is interrupted is a lighting device 30.

As a result, the device control system 10 of the present disclosure can turn on the lighting devices 30 while limiting the number of devices to which power is supplied when the power supply is interrupted. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power supply is interrupted.

In addition, for example, in the device control system 10 of the present disclosure, the power supply device 20 reads device information stored in each of the multiple power receiving devices, which indicates the power consumption of each of the power receiving devices, from each of the power receiving devices, and selects the power receiving device to which power is supplied when the power is cut off, based on the device information.

As a result, the device control system 10 of the present disclosure can adjust the total power consumption of the power receiving devices and select the device to which power is supplied when the power supply is interrupted. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power supply is interrupted.

Also, for example, in the device control system 10 of the present disclosure, the power supply device 20 reads device information from the power receiving device before the power receiving device is started, while the power receiving device is started, or when the battery device 90 is started.

This allows the device control system 10 disclosed herein to read device information from the power receiving device at various times.

In addition, for example, in the device control system 10 of the present disclosure, the power supply device 20 selects a power receiving device to which power is to be supplied when the power supply is interrupted based on a priority order preset for each of the multiple power receiving devices.

As a result, the device control system 10 of the present disclosure can supply power only to power receiving devices with high importance when the power supply is interrupted. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power supply is interrupted.

Also, for example, in the device control system 10 of the present disclosure, the power supply device 20 changes the dimming ratio of the selected power receiving device depending on the remaining charge of the battery device 90.

As a result, the device control system 10 of the present disclosure can adjust the power consumption of the power receiving device according to the remaining charge of the battery device 90 when the power supply is interrupted. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power supply is interrupted.

Also, for example, in the device control system 10 of the present disclosure, the power supply device 20 changes the dimming ratio of the selected power receiving device depending on the duration of the power interruption.

As a result, the device control system 10 of the present disclosure can adjust the power consumption of the power receiving device according to the power interruption time when the power is interrupted. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power is interrupted.

Also, for example, in the device control system 10 of the present disclosure, the power supply device 20 further reduces the number of selected power receiving devices depending on the remaining charge of the battery device 90.

As a result, the device control system 10 of the present disclosure can adjust the number of power receiving devices according to the remaining charge of the battery device 90 when the power is cut off. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power is cut off.

Also, for example, in the device control system 10 of the present disclosure, the power supply device 20 further reduces the number of selected power receiving devices depending on the duration of the power interruption.

As a result, the device control system 10 of the present disclosure can adjust the number of power receiving devices according to the power interruption time when the power is interrupted. Therefore, the device control system 10 of the present disclosure can reduce the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power is interrupted.

For example, in the device control system 10 of the present disclosure, the power supply device 20 determines that a power interruption has occurred based on a signal transmitted from the battery device 90.

This allows the device control system 10 disclosed herein to accurately determine whether a power outage has occurred.

For example, in the device control system 10 of the present disclosure, the power supply device 20 determines that a power interruption has occurred based on whether the current detected by the power supply device 20 is AC or DC.

This allows the device control system 10 disclosed herein to determine whether a power outage has occurred without sending or receiving any signals.

For example, in the device control system 10 of the present disclosure, when the power supply device 20 detects a power interruption, it selects an emergency light that is not turned on when the power supply is turned on as a power receiving device to which the power supply device 20 supplies power.

As a result, the device control system 10 of the present disclosure can turn on the emergency lighting when the power supply is interrupted. Therefore, the device control system 10 of the present disclosure can ensure safety while reducing the required capacity of the battery device 90 that supplies power to the power supply device 20 when the power supply is interrupted.

For example, in the device control system 10 of the present disclosure, the lighting device 30 is a base light, a system ceiling light, a downlight, or a spotlight.

This allows the device control system 10 of the present disclosure to be equipped with a variety of lighting devices 30.

For example, in the device control system 10 of the present disclosure, the power receiving device is an air conditioner, a camera, a speaker, a disaster prevention device, a sensor, a wireless device, or a user interface device.

This allows the device control system 10 of the present disclosure to be equipped with a variety of devices.

Other Embodiments
Although the embodiment has been described above, the present invention is not limited to the above embodiment.

For example, in the above embodiment, the device control system is realized by multiple devices, but it may be realized as a single device. For example, the device control system may be realized as a single device corresponding to a power supply device, or as a single device corresponding to a power receiving device (such as a wireless device or a lighting device). When the device control system is realized by multiple devices, the components of the device control system described in the above embodiment may be allocated in any manner to the multiple devices.

In addition, in the above embodiment, the processing performed by a specific processing unit may be executed by another processing unit. Also, the order of multiple processes may be changed, or multiple processes may be executed in parallel.

In addition, in the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

In addition, each component may be realized by hardware. Each component may be a circuit (or an integrated circuit). These circuits may form a single circuit as a whole, or each may be a separate circuit. In addition, each of these circuits may be a general-purpose circuit, or a dedicated circuit.

The general or specific aspects of the present invention may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a computer-readable recording medium such as a CD-ROM. The present invention may also be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium.

For example, the present invention may be realized as the power supply device or power receiving device of the above-mentioned embodiment. The present invention may also be realized as a control method for the device control system of the above-mentioned embodiment. The present invention may also be realized as a program for causing a computer to execute such a control method, or as a computer-readable non-transitory recording medium on which such a program is recorded.

In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art may conceive, or forms realized by arbitrarily combining the components and functions of each embodiment within the scope of the spirit of the present invention.

REFERENCE SIGNS LIST 10 Device control system 20 Power supply device 30 Lighting device 40 Disaster prevention device 50 Camera 60 Air conditioning device 90 Battery device

Claims (12)

A plurality of power receiving devices;
a power supply device having a plurality of connection ports and supplying power to the plurality of power receiving devices through the plurality of connection ports;
a battery device that supplies power to the power supply device when a power source is cut off;
The power supply device includes:
determining whether a predetermined condition regarding the duration of the power interruption is satisfied at the time of the power interruption;
When it is determined that the predetermined condition is satisfied, the number of the power receiving devices to which the power supplying device supplies power is reduced from the number of the power receiving devices to which the power supplying device supplies power under normal circumstances;
when it is determined that the predetermined condition is not satisfied, the number of the power receiving devices to which the power supplying device supplies power is maintained to be the same as the number of the power receiving devices to which the power supplying device supplies power during the normal period. At least one of the power receiving devices to which the power supply device supplies power during a power interruption is a lighting device.
The device control system according to claim 1 . The power supply device reads device information indicating a power consumption of each of the power receiving devices, the device information being stored in each of the power receiving devices, from each of the power receiving devices, and selects the power receiving device to which power is supplied when a power source is cut off, according to the device information.
3. The device control system according to claim 1 or 2. The power supply device reads the device information from the power receiving device before the power receiving device is started, during the power receiving device is started, or at the time of starting the battery device.
The device control system according to claim 3 . The power supply device selects the power receiving device to which power is to be supplied when power is cut off, based on a priority order preset for each of the plurality of power receiving devices.
3. The device control system according to claim 1 or 2. the power supply device changes a dimming ratio of the selected power receiving device in accordance with a remaining charge of the battery device.
The device control system according to claim 2 . The power supply device changes a dimming ratio of the selected power receiving device according to a duration of the power supply interruption.
The device control system according to claim 2 . The power supply device determines that a power supply interruption has occurred based on a signal transmitted from the battery device.
The device control system according to any one of claims 1 to 7 . The power supply device determines whether a power interruption has occurred based on whether a current detected by the power supply device is AC or DC.
The device control system according to any one of claims 1 to 7 . When the power supply device detects a power interruption, the power supply device selects an emergency light that is not turned on when the power supply is turned on as the power receiving device to which the power supply device supplies power.
The device control system according to any one of claims 1 to 9 . The lighting device is a base light, a system ceiling light, a downlight, or a spotlight.
8. An equipment control system according to any one of claims 2, 6 and 7. The power receiving device is an air conditioner, a camera, a speaker, a disaster prevention device, a sensor, a wireless device, or a user interface device.
The device control system according to any one of claims 1 to 11 .

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