JP2010098860A - Power feeding system and work space - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for reducing power consumption during peak hours of an electric apparatus. <P>SOLUTION: The power feeding system includes a plug connected to an existing outlet which receives the supply of a commercial power, a power supply device equipped with a battery capable of feeding the power to an electric apparatus, and a power feeding outlet which accepts a connection from the electric apparatus and feeds the electric power from the plug or power supply device to the electric apparatus. It also includes a switching apparatus capable of at least taking the first state which is provided in relation to the plug, the power supply apparatus, and the power feeding outlet, for electrical connection between the plug and the power feeding outlet, the second state for electrically connecting the power supply apparatus with the power feeding outlet while electrically disconnecting the plug from them, or the third state for electrically disconnecting the plug, the power supply apparatus, and the power feeding outlet from one another. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power supply system for supplying power to an electrical device and a work space including such a power supply system.

  Conventionally, it is known that the demand for commercial power is larger in working hours than in non-working hours. The response to the demand wave of commercial power is done by adjusting the operating rate of thermal power generation. That is, when the instantaneous demand for commercial power increases, the amount of power generated by thermal power generation increases, and the amount of carbon dioxide emission increases correspondingly. Based on these, various methods have been considered in order to equalize the demand for commercial power in offices and reduce carbon dioxide emissions. As one of them, a device that can cut off the supply of commercial power between the existing outlet that receives the supply of commercial power and the electrical equipment that does not need to be operated at all times during the time when the demand for power is maximum. For example.

  As such a device, a plug connected to an existing outlet for supplying commercial power, a power outlet for receiving a connection from an electric device and supplying electric power from the plug to the electric device, and the plug and the power outlet And a switching device capable of at least taking a first state in which the plug and the power outlet are electrically connected and a second state in which the plug and the power outlet are electrically disconnected. An apparatus is known (for example, see Patent Document 1).

Here, when a device such as that described in Patent Document 1 is used, the supply of electric power to an electric device that does not need to be constantly operated in the peak time zone is reduced, and the usage time zone of such an electric device is reduced to the peak time. The power consumption during peak hours can be reduced to some extent by guiding it outside the band. However, there are many electrical devices such as personal computers that need to be operated at all times during working hours, or that suddenly turn off the power, such as personal computers. May be big. In such an office, even if only an apparatus such as that described in Patent Document 1 is used, there are cases where the effect of reducing power consumption during peak hours is not sufficient.
JP 2006-114997 A

  In other words, there are many electrical devices that need to be operated at all times during working hours, or that have a problem when power is suddenly turned off. Conventionally, it has not been easy to meet such demands in response to demands for effectively reducing consumption.

  The present invention aims to solve such problems.

  That is, the power supply system according to the present invention includes a plug connected to an existing outlet that receives supply of commercial power, a power supply device that includes a battery that can supply power to the electrical device, and the plug or power supply device that accepts connection from the electrical device. A power supply outlet for supplying electric power from the power supply to the electrical device, and a first state, a power supply apparatus, which are provided in association with the plug, the power supply device, and the power supply outlet, and electrically connect the plug and the power supply outlet It is at least possible to take a second state in which the power outlet is electrically connected and the plug is electrically disconnected therefrom, and a third state in which the plug, the power supply device, and the power outlet are all electrically disconnected from each other. And a switching device.

  In such a case, when the switching device is in the second state, the electric device is operated from the power supply device even if the supply of commercial power is cut off by electrically disconnecting the plug from the power supply outlet. Power can be supplied. Therefore, if this power supply system is used when using an electric device such as a personal computer that needs to be operated at all times within the working hours or an electric device that causes trouble if the power is suddenly cut off, such an electric device can be used. It is possible to reduce the demand for commercial power while operating constantly during working hours. Alternatively, while temporarily operating the electric device as described above with the power from the battery, it is possible to notify the stop of the power supply, prompt the user to stop the operation of the electric device, and raise the user's awareness of power saving. it can. Furthermore, since this power feeding system can be installed individually for each existing outlet, the demand for commercial power from each existing outlet can be reduced by connecting this power feeding system to any existing outlet as necessary.

  In order to more effectively level the demand for commercial power, the battery is a rechargeable storage battery, and the switching device includes a plug in addition to the first, second, and third states. It is desirable to be able to take a fourth state in which the power supply device is electrically connected and the power supply outlet is electrically disconnected therefrom. If this is the case, the switching device is set to the fourth state at midnight or the like, and the storage battery is charged, and the switching device is set to the second time during the peak time of power demand during working hours. This is because the electric power charged as a state can be supplied to the electric device.

  In an office or the like having a plurality of such power feeding systems, in order to be able to manage a plurality of power feeding systems in a unified manner, the switching device receives the switching signal from an external control device and receives the first and second switching signals. Or those that can selectively take the third state. Further, when the battery of the power feeding system is a storage battery, and the switching device can take the fourth state in addition to the first, second, and third states, the switching device. Is preferably configured to receive the switching signal from the external control device so as to be able to selectively take the first, second, or third state. With these configurations, a peak time zone and a non-working time zone are stored in advance in an external control device, and a signal for switching the switching device to the second state is received by the power feeding system during the peak time zone. In the non-working time zone, the power feeding system can be made to receive a signal for switching the switching device to the third or fourth state. In addition, if the setting of the peak time zone and the non-working time zone is performed centrally on the control device side, it is possible to flexibly cope with the change of the peak time zone and the non-working time zone.

  In addition, as a configuration capable of suppressing or preventing the occurrence of a problem that the supply of electric power to an electric device is interrupted due to battery exhaustion, the apparatus further includes an electromotive force detection unit that detects the electromotive force of the battery for switching determination of the switching device. Are listed. If this is the case, when the switching device is in the second state and the electric power is supplied from the battery to the electric device, if the electromotive force of the battery detected by the electromotive force detection means is below a predetermined value, This is because a signal indicating that is sent to the control device, and the control device is prompted to issue a signal for switching the switching device from the second state to the first state.

  Further, in order to encourage the user of electric equipment to reduce the amount of power used, the commercial power supply amount detecting means for detecting the supply amount of commercial power from the plug and the commercial power supply amount detecting means detect It is desirable to further include supply amount display means for visualizing and displaying the supplied amount of commercial power.

  In addition, when such a power supply system is connected to an external control device, as an aspect for enabling monitoring of power usage on the external control device side, the electromotive force of the battery, What further includes transmission means for transmitting a signal including at least one of the supply amount of commercial power from the plug and the supply amount of electric power from the power supply outlet to the electrical device to an external control device. If this is the case, the external controller side visualizes the electromotive force of the battery, the amount of commercial power supplied from the plug, and the amount of power supplied from the power supply outlet to the electrical device based on the signal. This is because it is possible to monitor the power usage status by recording such changes with time in a log.

  As a preferred usage mode of such a power supply system, a plurality of existing outlets that receive commercial power supply, a plurality of power supply systems as described above connected to the existing outlets, and power from the power supply outlet of the power supply system And a work space provided with an electric device that receives the supply of.

  In particular, if the workspace has a plurality of furniture having the power supply system or a workspace having a plurality of furniture having the power supply system, the furniture having the power supply system for each section set in the work space. By arranging the power feeding system for each section that is arranged or set for a plurality of pieces of furniture that can be used by a large number of people, it is possible to level the power demand for each section.

  In such a workspace, in order to level the power demand while increasing the degree of freedom of furniture arrangement, it is only necessary that at least a part of the furniture including the power feeding system is movable.

  According to the present invention, when the switching device is in the second state, even if the supply of commercial power is cut off by electrically disconnecting the plug from the power supply outlet, the electric device is operated from the power supply device. Can supply power. Therefore, if this power supply system is used when using an electric device such as a personal computer that needs to be operated at all times within the working hours or an electric device that causes trouble if the power is suddenly cut off, such an electric device can be used. It is possible to reduce the demand for commercial power while operating constantly during working hours. Or, while temporarily operating the electric device as described above with the electric power from the battery, it is also advised to stop the operation of the electric device by notifying the stoppage of the power supply, and to raise the user's awareness of power saving. it can. Furthermore, since this power feeding system can be installed individually for each existing outlet, the demand for commercial power from each existing outlet can be reduced by connecting this power feeding system to any existing outlet as necessary.

  Hereinafter, an embodiment of the present invention will be described.

  The workspace W according to the present embodiment supplies power from a plurality of existing outlets 1 that receive commercial power supply, a power supply system 2 connected to the existing outlet 1, and a power supply outlet 23 of the power supply system 2. A plurality of receiving printers 32 and an electric device 3 such as a copier 33 are provided. In the present embodiment, the server 4 is further provided as a control device capable of issuing a switching signal to the power feeding system 2. The server 4 as the control device may be provided outside the work space W. In the description of the present embodiment, the “electrical device 3” is a general term for electric devices that receive power from the power supply outlet 23 of the power supply system 2.

  Further, the work space W includes a furniture 5 with a top plate that can be used by a large number of people, and is provided with a plurality of such power feeding systems 2, specifically, one at each longitudinal end. Yes. On the top plate of the furniture 5 with the top plate, a personal computer 31 as an electric device 3 that receives power supply from the power supply outlet 23 of the power supply system 2 can be placed. Further, the power feeding system 2 is provided between one of the printers 32 and the existing outlet 1, and between the copier 33 and the existing outlet 1, respectively.

  The power supply system 2 includes a plug 21 connected to an existing outlet 1 that is supplied with commercial power, a power supply device 22 that can supply power to the electrical device 3 and that can be charged, and a power supply device 22 that can be charged. A power supply outlet 23 for receiving connection and supplying power from the plug 21 or the power supply device 22 to the electrical device 3 and a switching device 24 provided in association with the plug 21, the power supply device 22, and the power supply outlet 23. It has. The power supply system 2 also includes an electromotive force detection means 25 for detecting the electromotive force of the battery for switching determination of the switching device 24, and a signal indicating the electromotive force detected by the electromotive force detection means 25. The electromotive force signal transmitting means 26 for transmitting to the power supply, the commercial power supply amount detecting means 27 for detecting the supply amount of the commercial power from the plug 21, and the supply amount of the commercial power detected by the commercial power supply amount detection means 27. It further includes a supply amount display means 28 for visualizing display, and an electromotive force detection means 25, an electromotive force signal transmission means 26, a commercial power supply amount detection means 27, and a control unit 29 for controlling the supply amount display means 28. .

  More specifically, the power supply device 22 includes the storage battery 221, a rectifier 222 that is provided between the storage battery 221 and the plug 21, and converts an alternating commercial current into a direct current so that the storage battery 221 can be charged. An inverter 223 is provided between the storage battery 221 and the power supply outlet 23 and converts a direct current supplied from the storage battery 221 into an alternating current so that it can be supplied to the power supply outlet 23 for commercial power.

  As shown schematically in FIGS. 3 to 6, the switching device 24 includes a main circuit 241 that electrically connects the plug 21 and the power supply outlet 23, and is closer to the plug 21 than the power supply device 22 of the main circuit 241. The first switching unit 242 configured using a relay switch (not shown) provided in the circuit and the circuit provided by branching from the main circuit 241 toward the rectifier 222 are used. A second switching unit 243 configured as described above, and a third switching unit 244 configured in a circuit provided by branching from the main circuit 241 toward the inverter 223 and configured using a relay switch (not shown), A receiving unit 245 that receives a switching signal from the server 4, and receives the switching signal received by the receiving unit 245 and receives the first to third scans. It includes a switch controller 246 generates a signal for driving the etching unit 242 to 244. 3 to 6, the first to third switching units 242 to 244 are schematically shown. The receiving unit 245 is configured using, for example, an IP communication interface. Although not shown, the switch control unit 246 receives an instruction by receiving signals from the input / output interfaces connected to the receiving unit 245 and the first to third switching units 242-244. The microcomputer system is configured by using a microcomputer that includes a CPU that issues and a storage device that stores a program to be executed by the CPU. The switching device 24 is in a first state in which the plug 21 and the power supply outlet 23 are electrically connected, and the power supply device 22 and the power supply outlet 23 are electrically connected and the plug 21 is electrically disconnected from these. The second state, the third state in which all of the plug 21, the power supply device 22, and the power supply outlet 23 are electrically disconnected from each other, and the plug 21 and the power supply device 22 are electrically connected to each other to electrically connect the power supply outlet 23. It is at least possible to take a fourth state of automatic cutting. Here, in the present embodiment, in the first state, as shown in FIG. 3, the first switching unit 242 is in a connected state, and the second and third switching units 243 and 244 are in a disconnected state. In the second state, as shown in FIG. 4, the first and second switching units 242 and 243 are in a disconnected state, and the third switching unit 244 is in a connected state. In the third state, as shown in FIG. 5, all of the first to third switching units 242 to 244 are in a disconnected state. As shown in FIG. 6, in the fourth state, the first and second switching units 242, 243 are in a connected state, and the third switching unit 244 is in a disconnected state. Switching between the first, second, third, and fourth states is performed based on a switching signal received by the receiving unit 245 from the switch control unit 246 to the ON / OFF corresponding to the first to third switching units. This is done by issuing an OFF signal.

  The electromotive force detection means 25 uses, for example, a voltmeter connected between both electrodes of the storage battery 221, and the measured value of the voltmeter is sent to the electromotive force signal indicating the electromotive force of the battery via the control unit 29. It outputs to the power signal transmission means 26.

  The electromotive force signal transmission unit 26 receives the electromotive force signal from the electromotive force detection unit 25 via the control unit 29, and transmits the received electromotive force signal to an external control device. The electromotive force signal transmission means 26 is configured using, for example, an IP communication interface. The electromotive force signal transmission means 26 functions as the transmission means in the claims.

  The commercial power supply amount detection means 27 uses, for example, an ammeter connected between the plug 21 and the rectifier 222, detects the magnitude of the current as the supply amount of commercial power from the plug 21, A supply amount signal indicating the supply amount is output to the supply amount display means 28 via the control unit 29.

  The supply amount display means 28 uses, for example, a display device such as a liquid crystal display panel, receives the supply amount of commercial power indicated by the supply amount signal from the control unit 29, and displays it visually.

  Although not shown, the control unit 29 issues a command in response to signals from the voltmeter, the IP communication interface, the ammeter, an input / output interface connected to the display device, and the input / output interface. It is configured using a microcomputer system that includes a CPU and a storage device that stores a program to be executed by the CPU. When the program is executed by the CPU, the microcomputer system and each hardware described above cooperate to detect the electromotive force detection means 25, the electromotive force signal transmission means 26, and the commercial power supply amount detection. The function as the means 27 and the supply amount display means 28 is exhibited. The control unit 29 may be formed using a microcomputer system common to the switch control unit 246 of the switching device 24 described above. In this case, the input / output interface of the control unit 29 may be formed using an IP communication interface common to the receiving unit 245 of the switching device 24.

  On the other hand, the server 4 has a configuration similar to that known as a server computer. In other words, although not shown in the figure, a CPU, a storage device, a timer, and an input / output interface are provided. The input / output interface includes an input device such as a keyboard and a mouse, an output device such as a monitor display and a printer 32, and the like. A communication device such as a modem or a wireless router is connected. Then, the CPU executes the program stored in the storage device, so that the hardware constituting the server 4 cooperates and signals the power supply systems 2 as follows in response to the passage of time and the like. I try to emit. Here, when there is a change in the peak time zone or working hour zone, the changed peak time zone or working hour zone is stored in a predetermined area of the storage device of the server 4.

  First, at the start of the working hours, a switching signal for switching the switching device 24 to the first state is issued. In addition, a switching signal for switching the switching device 24 to the second state is issued at the start of a peak time period in which the power demand is particularly large in the working hours. On the other hand, at the end of the peak time period, a switching signal for switching the switching device 24 to the first state is issued. Further, at the end of the working hours, a switching signal for switching the switching device 24 to the third state is issued. Then, at the start of the midnight power supply time period, a switching signal for switching the switching device 24 to the fourth state is issued.

  In addition, when the server 4 receives an electromotive force signal indicating that the electromotive force of the storage battery 221 is equal to or lower than a predetermined value from the electromotive force signal transmitting unit 26 during the peak time period, A switching signal for switching the switching device 24 of the power feeding system 2 that has output the signal to the first state is generated.

  That is, the power supply system 2 according to the present embodiment changes the state as follows according to the passage of time.

  First, a switching signal for switching to the first state as shown in FIG. 3 is received from the server 4 at the start time of the working hours, and the commercial power supplied from the existing outlet 1 to the plug 21 is supplied via the power supply outlet 23. Supplied to the electrical equipment 3.

  Next, at the start time of the peak time zone, a switching signal for switching to the second state as shown in FIG. 4 is received from the server 4, and commercial power from the existing outlet 1 is cut off from the storage battery 221 of the power supply device 22. Is supplied to the electric device 3 through the power supply outlet 23.

  After that, when the electromotive force of the storage battery 221 does not become a predetermined value or less until the end time of the peak time zone, switching for switching from the server 4 to the first state as shown in FIG. 3 at the end time of the peak time zone. A signal is received, and commercial power supplied from the existing outlet 1 to the plug 21 is supplied to the electrical device 3 via the power supply outlet 23.

  On the other hand, when the electromotive force of the storage battery 221 is equal to or lower than the predetermined time before the end time of the peak time period, the electromotive force signal is transmitted to the server 4 and the server 4 that has received the electromotive force signal as shown in FIG. A switching signal for switching to the first state is received, and the commercial power supplied from the existing outlet 1 to the plug 21 is supplied to the electrical device 3 via the power supply outlet 23.

  Then, at the end time of the working hours, a signal for switching to the third state as shown in FIG. 5 is received from the server 4, and the power from the storage battery 221 of the existing outlet 1 and the power supply device 22 to the electric equipment 3 is received. Shut off the supply.

  Then, at the start time of the midnight power supply time zone, a switching signal for switching to the fourth state as shown in FIG. 6 is received from the server 4, and the supply of power to the electrical device 3 through the power supply outlet 23 is performed. The battery 221 of the power supply device 22 is charged by receiving commercial power from the existing outlet 1 while being shut off.

  After that, at the end time of the midnight power supply time period, a switching signal for switching to the third state is received from the server 4, and power is supplied from the existing outlet 1 and the storage battery 221 of the power supply device 22 to the electrical equipment 3. Cut off.

  As described above, according to the power supply system 2 according to the present embodiment, when the switching device 24 is in the second state, the plug 21 is electrically disconnected from the power supply outlet 23 to supply commercial power. Even if it cuts off, the electric power for operating the electric equipment 3 from the power supply device 22 can be supplied. Therefore, if the power supply system 2 is used when using the electric device 3 such as the personal computer 31 that needs to be constantly operated within the working hours or the electric device 3 that causes trouble when the power is suddenly cut off, This makes it possible to reduce the demand for commercial power during peak hours while always operating the electrical equipment 3 within the working hours. Furthermore, since this power feeding system 2 can be installed individually for each existing outlet 1, the demand for commercial power from each existing outlet 1 can be increased by connecting this power feeding system 2 to any existing outlet 1 as necessary. Can be reduced. In addition, the electricity charge for commercial power in offices is often set to correspond to the maximum demand for power in each office, etc. If the configuration of this embodiment is adopted, the maximum demand for power in each office etc. will be increased. Electricity can be reduced because it can be made smaller. In this embodiment, since the switching device 24 is in the third or fourth state and the supply of power to the power supply outlet is interrupted during times other than the working hours, consumption of standby power and the like can be suppressed. it can.

  Further, the switching device 24 is set to the fourth state during the supply time zone of midnight power, the storage battery 221 is charged while the supply of power to the electrical equipment 3 is cut off, and the switching device 24 is set to the second state during the peak time zone. By supplying the electric power charged to the storage battery 221 as the state 2 to the electric equipment 3, the demand for commercial power throughout the day can be leveled.

  Further, since the switching device 24 can selectively take the first, second, third and fourth states in response to a switching signal from the server 4, the working time is preliminarily set in the server 4. A plurality of power supply systems 2 can be managed in a centralized manner so that the power supply system 2 can store the band, the peak time period, and the supply time period of the midnight power so that the power supply system 2 can take the state to be taken in each time period as described above. Moreover, since the setting of the peak time zone and the non-working time zone is performed centrally on the server 4 side, it is possible to flexibly cope with the change of the peak time zone and the non-working time zone.

  In addition, since the electromotive force detecting means 25 for detecting the electromotive force of the storage battery 221 is further provided for the switching determination of the switching apparatus 24, the switching apparatus 24 is changed to the second state from the storage battery 221 to the electric device 3. If the electromotive force of the storage battery 221 detected by the electromotive force detection means 25 is less than or equal to a predetermined value while supplying power, an electromotive force signal is transmitted to the server 4 to switch the switching device 24 from the second state. By prompting the switching device 24 to issue a signal for switching to the first state and issuing a signal for switching to the first state from the server 4 to the switching device 24 of the power feeding system 2, the battery 3 runs out to the electrical device 3. It is possible to suppress or prevent the occurrence of a problem that the supply of electric power is interrupted.

  The commercial power supply amount detecting means 27 for detecting the supply amount of commercial power from the plug 21, and the supply amount display means 28 for visualizing and displaying the supply amount of commercial power detected by the commercial power supply amount detection means 27 Therefore, it is possible to prompt the user of the electric device 3 to reduce the amount of power used.

  In addition, since the power feeding system 2 is arranged for each section set in the furniture 5 with a ceiling plate that can be used by a large number of people, the power demand for each section can be leveled.

  The present invention is not limited to the embodiment described above.

  For example, in addition to furniture with a top panel having a plurality of power supply systems, furniture with a top panel having only one power supply system may be provided in one or a plurality of workspaces. Moreover, you may provide only one furniture with a top plate which has only one electric power feeding system in one or some work space.

  In particular, if at least a part of a plurality of furniture with a top plate having a power feeding system can be moved, power demand can be leveled while increasing the degree of freedom of furniture arrangement in such a work space.

  Furthermore, a commercial power supply amount signal transmitting means is provided for transmitting a commercial power supply amount signal to an external control device when the commercial power supply amount detected by the commercial power supply amount detecting means is equal to or greater than a predetermined value. When the supply amount of commercial power becomes equal to or greater than a predetermined value, a signal for switching the switching device to the second state is transmitted by transmitting a commercial power supply amount signal to an external control device via the commercial power supply amount signal transmitting means. You may make it urge to emit from a control apparatus. At this time, it is more preferable that an alarm indicating that the supply amount of the commercial power is equal to or greater than a predetermined value is displayed on the supply amount display means. In addition, a mode in which a commercial power supply amount signal indicating the supply amount of the commercial power is constantly transmitted to an external control device via a power supply amount signal transmission unit may be employed. Also, there is provided a total power supply amount signal transmitting means for transmitting a total power supply amount signal indicating not only the supply amount of commercial power but also the power supply amount from the power supply plug to an external control device, and this total power supply amount signal transmission You may employ | adopt the aspect which always transmits the said electric power total supply amount signal to an external control apparatus through a means. Of course, a mode in which both the commercial power supply amount signal and the total power supply amount signal are always transmitted to an external control device may be employed. Here, the commercial power supply amount signal transmission means and the total power supply amount signal transmission means function as transmission means in the claims. These commercial power supply amount signal transmission means and total power supply amount signal transmission means may be formed using an IP communication interface or the like.

  Moreover, you may set the division which arrange | positions the furniture with a top plate which can move, and the division which arranges the furniture with a top plate which uses a fixed position in a workspace. In such a workspace, different peak time zones may be set for the former section and the latter section.

  Furthermore, an overcharge prevention mechanism provided between the rectifier and the battery may be used as the second switching mechanism. A third switching mechanism may be provided between the battery and the inverter. Further, the second and third switching mechanisms may be formed using a semiconductor switch instead of the relay switch. Of course, the first switching mechanism may also be formed using a bidirectional thyristor or the like instead of the relay switch.

  In addition, in the first state, electric power may be supplied to the electric device while receiving the supply of commercial power and charging the storage battery. Further, in the second state, electric power may be separately supplied from the solar battery and supplied to the electric device while charging the storage battery. In these cases, if the storage battery is fully charged, the commercial power or the power from the solar battery may be supplied directly to the electric device.

  In the embodiment described above, the switching device of the power feeding system receives a switching signal from an external server, and switches to one corresponding to the switching signal among the first to fourth states based on the received switching signal. However, a switching signal may be issued from a control unit in the power feeding system. In this case, it is preferable to provide a microcomputer capable of outputting the current time in the microcomputer system constituting the control unit of the power feeding system, and to generate a switching signal based on the time zone to which the current time output from the timer belongs.

  On the other hand, as the battery of the power supply device, another battery such as a fuel cell may be used instead of the storage battery. In this case, it is impossible to charge the battery as the fourth state in which the switching device is electrically connected to the plug and the power supply device. However, the peak time zone and the supply amount of commercial power are over a predetermined level. If the switching device is in the second state, the power for operating the electrical equipment from the battery of the power supply device is cut off while the plug is electrically disconnected from the power supply outlet to cut off the supply of commercial power. Supply power while continuing to supply power to electrical equipment throughout the working hours while reducing the demand for commercial power during peak hours, or supplying power while supplying power for a predetermined time after cutting off the supply of commercial power It is possible to urge the user to stop powering and urge the user to stop the operation of the electric device, and to raise the user's awareness of power saving. Further, if the switching device is the third device except for working hours, at least consumption of standby power or the like can be suppressed.

  The electromotive force detection means and the electromotive force signal display means may be omitted as long as the battery itself can visualize the electromotive force toward the outside. Further, instead of providing the commercial power supply amount display means, a supply amount signal indicating the commercial power supply amount may be transmitted to an external control device or the like.

  In addition, the switching device may be brought into the third state after a predetermined time has elapsed from the time when the switching device has entered the second state. The switching to the third state in this case may be performed by receiving a switching signal for switching to the third state again from an external control device such as a server. In addition, a time-measurement element such as a timer provided in the power supply system is used to measure the time elapsed from the time when the switching device enters the second state by the control unit of the power supply system, and to switch to the third state. The control unit may execute a program that issues a switching signal to the receiving unit in the switching unit. In this case, there is provided a power supply stop notice signal transmission means for transmitting to the user that the supply of power to the electrical device is stopped using an LED, a buzzer, a screen display device, etc., and the switching device is a second switch. A power supply stop notice command may be issued from the control unit to the power supply stop notice signal transmission means after a predetermined time has elapsed from the time when the state becomes the state. With this configuration, when the amount of commercial power supplied from the plug or the amount of power supplied from the power supply outlet exceeds a predetermined value, or when the electromotive force of the battery constituting the power supply system becomes equal to or lower than a predetermined value, etc. , While the electric device is temporarily operated with the power from the battery for a predetermined time, the power supply is forewarned to be stopped, the electric device is urged to stop operating, and the user can be aware of power saving .

  In addition, various changes may be made without departing from the spirit of the present invention.

The schematic plan view which shows the work space which concerns on one Embodiment of this invention. Schematic which shows the electric power feeding system which concerns on the same embodiment. Schematic which mainly shows the switching apparatus of the electric power feeding system which concerns on the same embodiment. Schematic which mainly shows the switching apparatus of the electric power feeding system which concerns on the same embodiment. Schematic which mainly shows the switching apparatus of the electric power feeding system which concerns on the same embodiment. Schematic which mainly shows the switching apparatus of the electric power feeding system which concerns on the same embodiment.

Explanation of symbols

W ... Workspace 1 ... Existing outlet 2 ... Power feeding system 21 ... Plug 22 ... Power supply 221 ... Storage battery (battery)
23 ... Power outlet 24 ... Switching device 3 ... Electrical equipment

Claims (11)

A plug connected to an existing outlet receiving commercial power supply, a power supply device including a battery capable of supplying power to the electric device, and accepting a connection from the electric device and supplying electric power from the plug or the power supply device to the electric device A power supply outlet, and a first state in which the plug and the power supply outlet are electrically connected, and the power supply apparatus and the power supply outlet are electrically connected. And a switching device capable of taking at least a second state in which the plug is electrically disconnected from the plug and the third state in which the plug, the power supply device, and the power supply outlet are all electrically disconnected from each other. Characteristic power supply system. The battery is a rechargeable storage battery, and the switching device electrically connects the plug and the power supply device in addition to the first, second and third states, and electrically disconnects the power supply outlet. The power feeding system according to claim 1, wherein the fourth state can be taken. The power feeding system according to claim 1, wherein the switching device is configured to selectively take the first, second, or third state in response to a switching signal from an external control device. 3. The power feeding system according to claim 2, wherein the switching device is configured to selectively take the first, second, third, or fourth state in response to a switching signal from an external control device. . The power feeding system according to claim 3 or 4, further comprising an electromotive force detection means for detecting an electromotive force of the battery for switching determination of the switching device. The commercial power supply amount detection means for detecting the supply amount of commercial power from the plug, and the supply amount display means for visualizing and displaying the supply amount of commercial power detected by the commercial power supply amount detection means. The power supply system according to 1, 2, 3, 4 or 5. The apparatus further comprises a transmission means for transmitting a signal including at least one of the electromotive force of the battery, the supply amount of commercial power from the plug, and the supply amount of electric power from the power supply outlet to an electric device to an external control device. The power feeding system according to claim 1, 2, 3, 4 or 5. From a plurality of existing outlets for supplying commercial power, a plurality of power supply systems connected to the existing outlets, and a power supply outlet of the power supply system A work space comprising electrical equipment that receives power supply. The work space according to claim 8, comprising a plurality of furniture having the power feeding system. The work space according to claim 8, comprising furniture having a plurality of the power feeding systems. The work space according to claim 9 or 10, wherein at least a part of the furniture including the power feeding system is movable.

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