Emergency Power Supply System

Abstract

To provide an emergency device that operates on an emergency power source in an emergency, the emergency device capable of preventing operation from stopping even when power of an onboard battery runs short.SOLUTION: An emergency device disclosed in the present disclosure comprises a battery as an emergency power source. In an emergency, it is determined whether a remaining battery amount is equal to or larger than a reference value. When the remaining battery amount is equal to or larger than the reference value, the power of a battery is supplied to another emergency device. On the other hand, when the remaining battery amount is less than the reference value, the emergency device receives power from a battery of the other emergency device, and drives itself based on the power received from the other emergency device.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to emergency equipment and emergency power supply systems. [Background technology]

[0002] There is known an emergency device that has an emergency power supply device such as a battery and operates by receiving power from the emergency power supply device. Patent Document 1 discloses a lighting device that is connected to a lighting fixture and has a unit including a battery that supplies power to use a light source as an emergency light for emergency lighting in an emergency when power supply from an external power source is stopped, and a control unit that controls the supply of power from the battery to the light source. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-161504 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, when a plurality of emergency devices as described above are installed, there is a problem that an emergency device that runs out of battery power may stop operating.

[0005] In order to solve the above-mentioned problems, a first object of the present disclosure is to provide an emergency device that can prevent operation from stopping even when the power of the onboard battery is insufficient.

[0006] A second object of the present disclosure is to provide an emergency power supply system that can prevent emergency equipment from stopping operation due to insufficient battery power. [Means for solving the problem]

[0007] A first aspect of the present disclosure is an emergency device that operates using an emergency power source in an emergency, A battery is provided as the emergency power supply, In the emergency, a remaining charge determination process is executed to determine whether or not the remaining charge of the battery is equal to or greater than a reference value; When the remaining charge of the battery is equal to or greater than the reference value, The power supply device is configured to supply power from the battery to another emergency device. If the remaining charge of the battery is not equal to or greater than the reference value, A receiving process for receiving power from the battery of another emergency device; A drive process for driving the device itself based on the power received from the other emergency device; Preferably, the method is configured to execute:

[0008] In addition, a second aspect is preferably an emergency power supply system including a plurality of the emergency devices according to claim 1. Effect of the Invention

[0009] According to the first aspect of the present disclosure, it is possible to provide an emergency device that can prevent operation from stopping even when the power of an onboard battery runs short.

[0010] According to a second aspect of the present disclosure, it is possible to provide an emergency power supply system that can prevent emergency equipment from stopping operation due to a shortage of battery power. [Brief description of the drawings]

[0011] [Figure 1] 1 is a diagram illustrating a configuration example of an emergency power supply system according to a first embodiment of the present disclosure. [Diagram 2] 1 is a block diagram showing a detailed configuration example of an emergency power supply system according to a first embodiment of the present disclosure. [Diagram 3] FIG. 2 is a diagram illustrating the operation of the emergency power supply system according to the first embodiment of the present disclosure. [Figure 4] 4 is a flowchart of a process executed by an emergency light and an emergency light according to the first embodiment of the present disclosure. [Diagram 5] 4 is a flowchart of a normal process executed by an emergency exit light according to the first embodiment of the present disclosure. [Figure 6] 4 is a flowchart of a normal process executed by an emergency light according to the first embodiment of the present disclosure. [Figure 7] 13 illustrates a configuration example in which two emergency lights and two emergency lights output a common battery voltage according to a second embodiment of the present disclosure. [Figure 8] 13 illustrates a configuration example according to a second embodiment of the present disclosure in which the battery voltages output by two emergency lights and two emergency lights are not shared. [Figure 9] FIG. 1 is a circuit block diagram of an emergency light and an emergency guide light according to a first embodiment of the present disclosure. [Figure 10] FIG. 11 is a circuit block diagram of an emergency light and an escape light according to a third embodiment of the present disclosure. [Figure 11] FIG. 11 is a circuit block diagram of an emergency light and an escape light according to a fourth embodiment of the present disclosure. [Figure 12] FIG. 13 is a block diagram showing a detailed configuration example of an emergency power supply system according to a fifth embodiment of the present disclosure. [Figure 13] 23 is a flowchart of a process executed by an emergency light and an emergency light according to a sixth embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] First embodiment FIG. 1 is a diagram showing a configuration example of an emergency power supply system 100 according to a first embodiment of the present disclosure. In this embodiment, an example in which the system is applied to an emergency light and an emergency light will be described as an example of emergency equipment. The emergency power supply system 100 includes a relay RT connected to an external power source AC, an emergency light 10(1), an emergency light 10(2), and an emergency light 20(1), which are connected to the external power source AC via the relay RT. Hereinafter, the emergency light 10(1) and the emergency light 10(2) will be referred to only when the two emergency lights 10 are described separately. When the explanation is common to the emergency light 10(1) and the emergency light 10(2), the emergency light 10 will be simply referred to as the emergency light 10. The same applies to the emergency light 20. Furthermore, when the explanation is common to both the two emergency lights 10 and the two emergency lights 20, the emergency light 20 will be referred to as the emergency equipment 30.

[0013] In the following, a power supply system including two emergency lights 10 and two emergency lights 20 and derived from an external power supply AC is referred to as a power supply system L1. However, the number of emergency lights 10 and 20 is merely an example, and is determined appropriately depending on the facility in which the emergency power supply system 100 is installed. This point is common to all the following embodiments.

[0014] In normal times when the external power source AC is supplied, the voltage is applied to the input terminal of the relay RT, and the contact is turned on, thereby supplying power to the emergency device 30. On the other hand, in an emergency when the supply of the external power source AC is cut off, no voltage is applied to the input terminal, and the contact is turned off. In this way, it is preferable that the relay RT be an a-contact (make contact).

[0015] The emergency exit light 10 functions as a backlight for an information signboard on which pictograms showing evacuation guidance are written.

[0016] In the event of an emergency in which the external power source AC is cut off, the emergency light 20 illuminates the floor surface with a built-in lamp to ensure brightness in the installation area.

[0017] As described above with reference to FIG. 1, the emergency power supply system 100 of the present disclosure includes a plurality of emergency devices 30 connected to the same power supply system L1.

[0018] <Modification> In the example of Fig. 1, the multiple emergency devices 30 are installed on one floor BD. However, the emergency devices 30 do not necessarily have to be installed on one floor, and may be installed distributed across multiple floors BD in a building. This point is common to all the following embodiments.

[0019] FIG. 2 is a block diagram showing a detailed configuration example of the emergency power supply system 100 according to the first embodiment of the present disclosure.

[0020] The emergency exit light 10 includes an emergency exit light unit 11, a battery 12, and a lamp 13 as a backlight for the guide signboard.

[0021] In the emergency light unit 11, the AC / DC converter 111 converts the AC voltage derived from the external power source AC into a desired DC voltage. The lighting circuit 112 operates by application of the DC voltage converted by the AC / DC converter 111 or the voltage of the battery 12, and lights the lamp 13. The charging circuit 113 charges the battery 12 when the external power source AC is supplied. This allows the lamp 13 to be lit by the external power source AC during normal operation, and to be lit by the power of the battery 12 in an emergency when the external power source AC is cut off.

[0022] The external input / output circuit 114 receives battery power input from another emergency light 10 or two emergency lights 20. Alternatively, it outputs power from its own battery 12 to another emergency light 10 or two emergency lights 20.

[0023] The emergency light 20 comprises an emergency light unit 21, a battery 22, and a lamp 23.

[0024] In the emergency light unit 21, the AC / DC converter 211 converts the AC voltage from the external power source AC into a desired DC voltage. The lighting circuit 212 is operated by application of the voltage of the battery 22, and lights the lamp 23. The charging circuit 213 charges the battery 22 when the external power source AC is supplied. This makes it possible to light the lamp 23 with the power of the battery 22 in an emergency when the external power source AC is cut off.

[0025] The external input / output circuit 214 receives battery power input from the emergency light 10 or another emergency light 20. Alternatively, it outputs power from its own battery 22 to the emergency light 10 or another emergency light 20.

[0026] The lamp 13 of the emergency light 10 and the lamp 23 of the emergency light 20 may be an incandescent lamp or an LED.

[0027] FIG. 3 is a diagram illustrating the operation of the emergency power supply system 100 according to the first embodiment of the present disclosure.

[0028] In normal operation, the emergency exit light 10 lights up the lamp 13 and charges the battery 12.

[0029] On the other hand, in an emergency, the emergency light 10 stops the operation of the AC / DC converter 111 and instead lights the lamp 13 via the lighting circuit 112. The power of the battery 12 that lights the lamp 13 is also supplied to the external input / output circuit 114, and is also supplied to other emergency lights 10 and emergency lights 20 that require power.

[0030] Meanwhile, emergency light 20 differs from emergency light 10 in that, under normal circumstances, it only charges battery 22 and does not light lamp 23. Meanwhile, the operation of emergency light 20 in an emergency is similar to that of emergency light 10 described above, and therefore a description thereof will be omitted. In the following description, when the operation of emergency light 20 is similar to that of emergency light 10, it may be noted that the operation is similar to that of emergency light 10, and a description thereof may be omitted. In such a case, emergency light 10 may be appropriately read as emergency light 20, AC / DC converter 111 as AC / DC converter 211, lighting circuit 112 as lighting circuit 212, and lamp 13 as lamp 23.

[0031] 3, the manner in which power from the battery 12 of the emergency light 10(1) is supplied to the power supply system L1 will be described below. For the sake of explanation, it is assumed that the battery 12 of the emergency light 10(1) has some remaining power, and that the batteries of the emergency light 10(2), the emergency light 20(1), and the emergency light 20(2) have no remaining power. The arrows indicate the route of the current flowing from the battery 12 of the emergency light 10(1). The emergency light 10(1) supplies power from its own battery 12 to its own lighting circuit 112, and also to the power supply system L1 via the external input / output circuit 114.

[0032] Meanwhile, the emergency light 10(2) receives battery power from the emergency light 10(1) via the external input / output circuit 114. Furthermore, the emergency light 10(2) drives the lighting circuit 112 with the received power to light the lamp 13. The same is true for the two emergency lights 20.

[0033] In this way, in the emergency power supply system of the present disclosure, the emergency device 30 with excess power in the battery 12 provides battery power to other emergency devices 30 connected to the same power supply system L1. This makes it possible to operate the emergency device 30 whose battery has run out of power.

[0034] Here, the emergency devices 30 belonging to the same power supply system L1 are separated from the other power supply systems by the relay RT. Therefore, it should be noted that the power of the battery 12 output by the external input / output circuit 114 of the emergency light 10 is not supplied to any other than the other emergency light 10 and the two emergency lights 20. This makes it possible to reduce the power consumption of the battery 12.

[0035] 4 is a flowchart of a process executed by the emergency light 10 and the emergency light 20 according to the first embodiment of the present disclosure. Here, the case of the emergency light 10 will be described, but the same applies to the emergency light 20, including the modified example. For the emergency light 20, please make the above-mentioned substitutions.

[0036] First, the process starts. Next, it is determined whether or not the external power source AC is being supplied (step S01). If the external power source AC is not being supplied, the operation of the AC / DC converter 111 is stopped (step S02).

[0037] Furthermore, the emergency light 10 executes a process to determine whether the remaining charge of its own battery 12 is equal to or greater than a reference value (step S03). The reference value may be a discharge reference voltage indicating that discharging of the battery 12 has ended. If the remaining charge is equal to or greater than the reference value in step S03, the emergency light 10 determines that it is possible to supply power to other emergency devices 30, and changes the external input / output circuit 114 to an output mode (step S04). Next, the emergency light 10 drives its own lighting circuit 112 to light the lamp 13 (step S05).

[0038] On the other hand, if the remaining charge of the battery 12 is less than the reference value, the emergency light 10 determines that power supply from another emergency device 30 is necessary, and switches the external input / output circuit 114 to the input mode (step S06). Next, based on the battery power supplied from the other emergency device 30, the emergency light 10 drives its own lighting circuit 112 to light the lamp 13 (step S07).

[0039] The processes from step S01 to step S07 are executed in an emergency, and are therefore hereinafter referred to as emergency processes.

[0040] On the other hand, if it is determined in step S01 that the external power source AC is being supplied, normal processing, which will be described later, is performed (step S08).

[0041] As described above, the emergency exit light 10 judges whether it is the power supplier or the power recipient, depending on the remaining charge of the battery 12. This makes it possible to prevent damage to the battery 12 caused by supplying too much voltage to other emergency devices 30.

[0042] <Modification> In addition, a human sensor may be added to each of the two emergency exit lights 10, and a process of determining whether the human sensor detects a human may be added before step S03. If a human is detected, the processes from step S03 onward may be executed in sequence. On the other hand, if a human is not detected, this means that evacuation has been completed in the area where the emergency exit lights 10 are installed, and there is no need to further promote evacuation guidance. Therefore, the emergency exit lights 10 turn off their own lamps 13 and then execute step S03. If the remaining charge of the battery 12 is determined to be equal to or greater than the reference value in step S03, the emergency exit lights 10 execute step S04 and change the external input / output circuit 114 to the output mode. Also, even if the remaining charge of the battery 12 is not determined to be equal to or greater than the reference value in step S03, the emergency exit lights 10 do not execute step S06. This is a measure taken because there is no need to change the external input / output circuit 114 to the input mode since evacuation has been completed. This allows priority to be given to the power supply to the emergency equipment 30 installed in the area where evacuation has not yet been completed, improving the reliability of evacuation guidance. This point is common to all the following embodiments.

[0043] The human presence sensor does not have to be mounted on the emergency exit light 10, and may be installed near the emergency exit light 10. By notifying the emergency exit light 10 of the detection information of the human presence sensor via a network, the same effect as described above can be obtained.

[0044] FIG. 5 is a flowchart of a normal process executed by the emergency light 10 according to the first embodiment of the present disclosure. First, the process is started. Next, it is determined whether the lamp 13 is connected (step S11). If the connection is not recognized, the lighting circuit 112 is stopped (step S12). Furthermore, a first indicator light indicating the state of the lamp 13 is turned on (step S13). This makes it possible to notify that the lamp 13 is not connected. Here, the indicator light is, for example, a red LED not shown in FIGS. 1 to 3. Note that step S11 may be for determining a fault of the lamp 13, such as a short circuit fault or an open circuit fault, instead of determining whether the lamp 13 is connected or not, or may be for determining the connection and fault of the lamp 13 simultaneously.

[0045] On the other hand, if the connection of the lamp 13 is confirmed in step S11, the lighting circuit 112 is driven to light the lamp 13 (step S14), and the first indicator light is turned off (step S15).

[0046] Furthermore, it is determined whether or not the battery 12 is connected (step S16). If the connection is confirmed, the charging circuit 113 is driven to charge the battery 12 (step S17). Furthermore, a second indicator light indicating that the battery 12 is being charged is turned on (step S18). Here, the second indicator light is not shown in Figs. 1 to 3 and is, for example, a green LED. Note that in step S16, instead of determining whether or not the battery 12 is connected, it may be determined whether or not the battery 12 is being normally charged.

[0047] On the other hand, if connection of the battery 12 is not recognized in step S16, the charging circuit 113 is stopped (step S19). Furthermore, the second indicator light is turned off (step S20). This makes it possible to notify that the battery 12 is not being charged or is not connected.

[0048] <Modification> In step S11, it may be possible to further determine whether the accumulated lighting time of the lamp 13 exceeds a preset upper limit value, or whether a fault in the emergency light 10 such as a short circuit or an open circuit has been detected, and the first indicator light may be turned on depending on the result. This point is common to all the following embodiments.

[0049] 6 is a flowchart of normal processing executed by the emergency light 20 according to the first embodiment of the present disclosure. The normal processing flowchart executed by the emergency light 20 is similar to step S16 and subsequent steps in the case of the emergency light 10 shown in FIG. 5, and therefore a description thereof will be omitted. The description of the emergency light 20 should be interpreted as described above. It should be noted here that the emergency light 20 does not light the lamp 23 during normal times, and therefore the processing from step S11 to step S15 in FIG. 5 is unnecessary.

[0050] As described above, in the emergency power supply system 100 of the present disclosure, an emergency device 30 with excess battery power provides power to other emergency devices 30. It is possible to prevent an emergency device 30 with insufficient battery power from stopping operation.

[0051] <Modification> The emergency device 30 is not limited to the emergency light 10 or the emergency light 20, but may be any disaster prevention device that is equipped with an emergency power supply device such as a battery and is driven by the power of the device in an emergency, such as a fire alarm or a voice guidance system. This point is common to all the following embodiments.

[0052] The emergency light 20 may be of a type that can also be used as lighting during normal times. A dual-purpose type emergency light 20 differs from the emergency light 10 in that a unit that is turned on during normal times is added, but is similar to the emergency light 10 in that the lamp 23 is turned on during normal times and the battery 22 is charged. The process performed by the dual-purpose type emergency light 20 during normal times is similar to the normal process of the emergency light 10 described in FIG. 5. This point is common to all of the following embodiments.

[0053] In addition, in order to check that the emergency exit light 10 operates normally in an emergency, the lighting industry standards (JIL5501, JIL5502) stipulate that the lamp 13 is kept on for a specified time by the discharge voltage of the battery 12 and the life of the battery 12 is measured. However, in the present disclosure, if the inspection is performed while the external input / output circuit 114 is executing emergency processing, the life of the battery 12 may not be accurately determined. That is, when the power of the own battery 12 is insufficient, power is supplied from other emergency equipment 30, so that the battery 12 may be mistakenly recognized as having a sufficient remaining capacity during the inspection. Furthermore, in the present disclosure, since the battery power is also output to other emergency equipment 30, the power of the battery 12 may suddenly decrease, so that the life measurement may not be performed accurately. As a countermeasure against this, in the emergency exit light 10 of the present disclosure, the operation of the external input / output circuit 114 may be stopped when the battery 12 is inspected. This allows the life of the battery 12 to be accurately determined. This point is common to all the following embodiments. The same applies to the emergency light 20, and the above-mentioned replacement should be performed.

[0054] Embodiment 2 In this embodiment, the means by which the emergency light 10 and the emergency light 20 output their own battery voltages is changed from that of the emergency power supply system 100 of the first embodiment.

[0055] 7 shows a configuration example according to the second embodiment of the present disclosure in which the battery voltage output by two emergency lights 10 and two emergency lights 20 is common. Here, it is assumed that the batteries 12 of the emergency light 10(1) and the emergency light 20(2) have remaining power, and the batteries of the emergency light 10(2) and the emergency light 20(1) have no remaining power.

[0056] The external input / output circuit 114 of the emergency light 10(1) is equipped with a step-up circuit or a step-down circuit, which steps up or steps down the voltage applied from the battery 12, converts it to +5V, and supplies it to the emergency light 10(2) and the emergency light 20(1). Even if the battery voltage is supplied to the other emergency equipment 30 as is, the emergency equipment 30 on the receiving side may break down due to the voltage being too high, or malfunction due to the voltage being too low. In this embodiment, the battery voltage is stepped up or stepped down and supplied to the other emergency equipment 30, thereby preventing malfunction in the emergency equipment 30 on the receiving side.

[0057] Similarly, the external input / output circuit 214 of the emergency light 20(2) also converts the voltage applied from the battery 22 to +5V and supplies it to the emergency light 10(2) and the emergency light 20(1). In this way, by unifying the output voltage in the multiple emergency devices 30, it is possible to output power in a balanced manner among the emergency devices 30 on the supplying side. Furthermore, it is possible to consume power in a balanced manner among the emergency devices 30 on the receiving side.

[0058] It should be noted that the battery voltages output by the plurality of emergency devices 30 need not be limited to +5V as long as they are unified.

[0059] FIG. 8 is a configuration example according to the second embodiment of the present disclosure in which the battery voltages output by the two emergency lights 10 and the two emergency lights 20 are not common. In FIG. 8, the battery voltages output by the emergency light 10(1) and the emergency light 20(2) are not common, but are set to different values. In this case, the emergency device 30 on the supplying side consumes the output power from the emergency light 20(2) having a higher voltage value with priority. By utilizing this, when the output time of the battery voltage in the supplying emergency device 30 exceeds a certain time, the battery voltage value is lowered, thereby making it possible to perform control such as suppressing the power supplied to other emergency devices 30.

[0060] Third embodiment FIG. 9 is a circuit block diagram of an emergency light 10 and an emergency light 20 according to the first embodiment of the present disclosure, and is shown as a comparative example to the third embodiment.

[0061] 10 is a circuit block diagram of the emergency light 10 and the emergency light 20 according to the third embodiment of the present disclosure. Here, the case of the emergency light 10 will be described, but the same applies to the emergency light 20, including the modified example. For the emergency light 20, please read as above.

[0062] In this embodiment, the AC / DC converter 111 is used as an input unit that accepts battery power from another emergency device 30. In normal operation, the AC / DC converter 111 full-wave rectifies the AC voltage from the external power source AC by a diode bridge to generate a pulsating voltage. It also functions as a DC / DC converter that converts the pulsating voltage into a desired DC voltage. In this embodiment, the AC / DC converter 111 uses this function as a DC / DC converter to convert the battery voltage from another emergency device 30 into a desired DC voltage. The external output circuit 115 shown in FIG. 10 is the external input / output circuit 114 of the first embodiment without the circuit for accepting the battery voltage. In this embodiment, the AC / DC converter 111 accepts the battery power, so that the circuit configuration of the external input / output circuit 114 can be simplified.

[0063] <Modification> In addition, in order to prevent workers from getting an electric shock when replacing the battery 12, which is a consumable part, from the viewpoint of the Illumination Industry Association standards (JIL5501, JIL5502), it is desirable to insulate the battery 12 from the external power source AC by a transformer. However, if the circuit method ensures the safety of workers, a non-insulated structure may be adopted.

[0064] Fourth embodiment 11 is a circuit block diagram of the emergency light 10 and the emergency light 20 according to the fourth embodiment of the present disclosure. Here, the case of the emergency light 10 will be described, but the same applies to the emergency light 20, including the modified example. For the emergency light 20, please read as above.

[0065] The emergency light 10 of this embodiment further includes a power failure detection circuit 116 that receives the voltage of the external power source AC and detects a power failure. Instead of the process described in step S01 of FIG. 4 of the first embodiment, the emergency light 10 of this embodiment executes a process to determine whether or not a power failure has been detected by the power failure detection circuit 116. The power failure detection circuit 116 determines that a power failure has occurred when the voltage of the external power source AC falls below 70% of the rated voltage. If a power failure is detected, the emergency light 10 sequentially performs the processes from step S02 onward. On the other hand, if a power failure is not detected, the emergency light 10 performs the process of step S08. Hereinafter, the value that is 70% of the rated voltage of the external power source AC, which is used by the power failure detection circuit 116 to determine a power failure, is referred to as the a value. For example, in the case of an external power source AC with a rated voltage of 100V, the a value is 70V.

[0066] Here, it is desirable to set the battery voltage output by the external input / output circuit 114 to a voltage lower than the value a. This allows the emergency equipment 30 on the supply side to determine whether the voltage is supplied for normal processing or emergency processing based on the voltage value of the received voltage. Note that if the power failure detection circuit 116 is not present, even if power is lent from another emergency equipment 30, the voltage may be mistaken for a voltage derived from the external power source AC, and normal processing may be performed.

[0067] On the other hand, since the battery voltage is generally low at several volts, and increasing the boost ratio of the external input / output circuit 114 reduces the voltage output efficiency, it is desirable for the battery voltage output by the external input / output circuit 114 to be in a range lower than value a and higher than the battery voltage. From these points of view, it is desirable for the battery voltage output by the external input / output circuit 114 to be set to about 10V to 20V when an external power supply AC of 100V is used. This allows the lamp 13 to be lit for a long period of time.

[0068] As described above, in this embodiment, the emergency light 10 further includes a power failure detection circuit 116. This allows the emergency device 30 on the supply side to reliably execute emergency processing when it receives electric power from another emergency device 30.

[0069] <Modification> In the above description, when a power outage is detected by the power outage detection circuit 116, the emergency light 10 sequentially performs the processes from step S02 in Fig. 4 onward. However, as described in the third embodiment, when the AC / DC converter 111 is used as an input unit that receives a voltage from another emergency device 30, even if a power outage is detected by the power outage detection circuit 116, it is not necessary to execute step S02 to stop the operation of the AC / DC converter 111. Instead, the emergency light 10 stops the operation of the charging circuit 113.

[0070] In the above description, the value a is set to 70% of the rated voltage of the external power supply AC. However, the ratio to the rated voltage does not have to be limited to 70%. For example, from the viewpoint of the lighting industry standards (JIL5501 and JIL5502), it is preferable to set the above-mentioned value a to 40% to 85% of the rated voltage. Also, although it is outside the regulations, it may be set to, for example, 30% of the rated voltage.

[0071] In the above description, the case has been described in which each emergency device 30 is provided with a power failure detection circuit 116. However, the power failure detection function may be integrated into the relay RT. This allows the relay RT to turn off its own contacts when a voltage of the external power source AC equal to or lower than the value a is detected, thereby cutting off the supply of the voltage to each emergency device 30. Since it is no longer necessary for each emergency device 30 to be provided with a power failure detection circuit 116, it is possible to achieve cost reduction.

[0072] Fifth embodiment FIG. 12 is a block diagram showing an emergency power supply system 100 according to a fifth embodiment of the present disclosure. In this embodiment, the emergency power supply system 100 is connected to a plurality of external power sources AC. Here, a power supply system including an emergency light 10(1) and an emergency light 20(1) and receiving power supply from the external power source AC(1) is designated as L2. Also, a power supply system including an emergency light 10(2) and an emergency light 20(2) and receiving power supply from the external power source AC(2) is designated as L3. In a large facility, a plurality of power supply systems may exist, and emergency devices 30 may be connected to each of the power supply systems.

[0073] In this embodiment, the external input / output circuits 114 mounted on the two emergency lights 10 and the external input / output circuits 214 mounted on the two emergency lights 20 are connected to each other by a power supply system LS for power interchange. This allows battery voltage to be interchanged between the emergency lights 10 and the emergency lights 20 belonging to different power supply systems. For example, even if the power supply system L3 experiences a power outage due to a disconnection or the like and the supply of the external power supply AC(2) is cut off, it is possible to interchange power to the emergency lights 10(2) and the emergency lights 20(2) from the emergency lights 10(1) and the emergency lights 20(1) that are normally supplied with the external power supply AC(1).

[0074] Sixth embodiment This embodiment has the same configuration as the emergency power supply system 100 in the first to fifth embodiments, but the emergency processing executed by the emergency light 10 and the emergency light 20 is changed. FIG. 13 is a flowchart of the processing executed by the emergency light 10 and the emergency light 20 according to the sixth embodiment of the present disclosure. Here, the case of the emergency light 10 will be described, but the same applies to the emergency light 20, including the modified example. For the emergency light 20, please make the above-mentioned substitutions.

[0075] First, the process starts. Next, it is determined whether or not the external power source AC is being supplied (step S31). If the external power source AC is being supplied, the normal process described with reference to Figs. 5 and 6 is performed (step S32).

[0076] On the other hand, if it is determined in step S31 that the external power source AC is not being supplied, the operation of AC / DC converter 111 is stopped (step S33).

[0077] Furthermore, the timer starts measuring (step S34).

[0078] Furthermore, a process is executed to determine whether or not the remaining charge of the battery 12 included in the emergency light 10 is equal to or greater than a reference value (step S35). If it is determined that the remaining charge is equal to or greater than the reference value, the emergency light 10 drives the lighting circuit 112 using the battery 12 of the emergency light 10 to light the lamp 13 (step S36). Furthermore, based on the time measured by the timer, it is determined whether or not the lamp 13 has been lit for a predetermined time or longer (step S37). It should be noted that JIL5501 specifies that emergency operation should be performed for 30 or 60 minutes, and JIL5502 specifies that emergency operation should be performed for 20 or 60 minutes.

[0079] If it is determined in step S37 that the lamp 13 has been lit for a predetermined time or longer, the external input / output circuit 114 is changed to an output mode (step S38). This allows the power of the battery 12 to be shared with other emergency equipment 30. Furthermore, it is determined whether the external power source AC is being supplied, that is, whether power has been restored (step S39). If power restoration is not determined, the process returns to determining the remaining charge of the battery 12 (step S35). If power restoration is determined, the process returns to determining whether the external power source AC is being supplied (step S31). This allows a transition to normal processing (step S32).

[0080] On the other hand, if it is not determined in step S37 that the lamp 13 has been turned on for the predetermined time or longer, the process proceeds to step S39. By skipping the change to the output mode of the external input / output circuit 114 (step S38), the lighting of the own lamp 13 can be prioritized.

[0081] On the other hand, if the remaining charge of the battery 12 is less than the reference voltage value in step S35, the emergency light 10 determines that power supply from another emergency device 30 is necessary, and switches the external input / output circuit 114 to the input mode (step S40). Next, based on the battery power supplied from the other emergency device 30, the emergency light 10 operates its own lighting circuit 112 to light the lamp 13 (step S41).

[0082] In this way, the emergency light 10 of this embodiment does not change the external input / output circuit 114 to the output mode if a predetermined time has not elapsed since the lamp 13 was turned on by the battery 12 provided in the emergency light 10. This allows the emergency light 10 to give priority to turning on its own lamp 13 and to keep it turned on for a specified period of time.

[0083] <Modification> If power restoration is confirmed in step S39, the process may proceed to step S32 without passing through step S31.

[0084] <Modification> The present disclosure is not limited to the above-described embodiment, and various modifications can be made in the implementation stage without departing from the spirit of the present disclosure. In addition, the embodiments may be implemented in appropriate combination, and in that case, the combined effects can be obtained.

[0085] <Modification> Furthermore, the emergency light 10 and the emergency light 20 do not necessarily have to have a lamp as long as they are equipped with a battery, a charging circuit, and an external input / output circuit. If they do not have a lamp, the emergency light 10 and the emergency light 20 are configured to supply their own battery power to the entire power supply system in the event of a power outage.

[0086] Various aspects of the present disclosure are summarized below as appendices. (Appendix 1) An emergency device that operates on an emergency power source in an emergency, A battery is provided as the emergency power supply, In the emergency, a remaining charge determination process is executed to determine whether or not the remaining charge of the battery is equal to or greater than a reference value; When the remaining charge of the battery is equal to or greater than the reference value, The power supply device is configured to supply power from the battery to another emergency device. If the remaining charge of the battery is not equal to or greater than the reference value, A receiving process for receiving power from the battery of another emergency device; A drive process for driving the device itself based on the power received from the other emergency device; 2. The emergency equipment configured to: (Appendix 2) Further equipped with a human presence sensor, The process further includes a process of determining whether or not a person is detected by the human presence sensor; The emergency device according to claim 1, wherein the acceptance process and the drive process are executed when detection of a person is confirmed. (Appendix 3) When the result of the remaining charge determination process indicates that the remaining charge of the battery is equal to or greater than the reference value, A self-driving process for driving the device itself based on the battery provided therein; a process of determining whether the self-driving process has been performed for a predetermined time or more; Further execute The emergency device according to claim 1, wherein the supply process is executed when it is determined that the self-driving process has been performed for a predetermined period of time or more. (Appendix 4) Further, the battery is inspected based on the discharge voltage of the battery. The emergency device according to any one of appendixes 1 to 3, wherein the supply process, the acceptance process, and the drive process are not executed while the inspection process is being executed. (Appendix 5) an external input / output circuit for executing the receiving process and the supplying process; The external input / output circuit, during normal operation when an external power source is supplied, The device is further configured to convert the AC voltage of the external power source into a DC voltage; The emergency device according to any one of appendix 1 to 4, further configured to execute a process of driving itself based on the converted DC voltage during the normal operation. (Appendix 6) further executing an emergency determination process for determining whether or not an emergency has occurred based on a voltage of an external power supply connected to the device itself; 6. The emergency device according to claim 1, wherein in the emergency determination process, when a voltage of the external power supply falls below a reference voltage value, it is determined that an emergency has occurred. (Appendix 7) 2. The emergency device according to claim 1, wherein the reference value is a discharge reference voltage indicating that discharging of the battery has been completed. (Appendix 8) An emergency power supply system comprising a plurality of emergency devices according to any one of appendixes 1 to 7. (Appendix 9) The plurality of emergency devices are connected to one external power source, a relay connected to the external power source; 9. The emergency power supply system of claim 8, wherein the relay is configured to perform a process of turning on and off the supply of voltage to the emergency equipment based on a voltage from an external power source. (Appendix 10) the emergency equipment includes a first emergency equipment powered by a first power supply system from a first external power supply, and a second emergency equipment powered by a second power supply system from a second external power supply, Each of the first emergency device and the second emergency device further includes an external input / output circuit that executes the reception process and the supply process; the external input / output circuit of the first emergency device and the external input / output circuit of the second emergency device are connected to each other by a third power supply system electrically separated from the first power supply system and the second power supply system; The emergency power supply system of claim 8, wherein the power of the battery during the supply process and the acceptance process is transmitted by a third power supply system. (Appendix 11) 11. The emergency power supply system according to claim 9, wherein the voltage of the battery supplied by the plurality of emergency devices in the supply process is common. [Explanation of symbols]

[0087] 10 emergency light, 11 emergency light unit, 12 battery, 13 lamp, 20 emergency light, 21 emergency light unit, 22 battery, 23 lamp, 30 emergency equipment, 100 emergency power supply system, 111 AC / DC converter, 112 lighting circuit, 113 charging circuit, 114 external input / output circuit, 115 external output circuit, 116 power failure detection circuit, 211 AC / DC converter, 212 lighting circuit, 213 charging circuit, AC external power supply, BD floor, L1 power supply system, L2 power supply system, L3 power supply system, LS power supply system, RT relay

Claims

1. An emergency power supply system in which a plurality of emergency devices that operate using an emergency power source in an emergency are connected, the plurality of emergency devices each include a battery as the emergency power supply; When any of the emergency devices operates on the power of the battery, the any of the emergency devices supplies power to any of the other emergency devices. Emergency power supply system.

2. Any of the emergency devices is When the remaining power of the built-in battery is equal to or greater than a reference value, supplying the power of the battery to any one of the other emergency devices; The emergency power supply system according to claim 1 .

3. Any of the other emergency devices is Consuming the power supplied from the battery of any of the emergency devices.

3. The emergency power supply system according to claim 1 or 2.

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