Power supply system and emergency broadcasting system

Abstract

To provide a power supply system which can allow for downsizing.SOLUTION: A power supply system 1 comprises: a power source connecting unit 11, a first power supply unit 12, and a second power supply unit 13. The power source connecting unit 11 is connected to an external power source 10. The first power supply unit 12 supplies electric power output from the power source connecting unit 11 to a receiver function unit 5. The receiver function unit 5 is disposed within a facility and receives a sensing result from a sensor 2 that detects an abnormality occurring in the facility. The second power supply unit 13 supplies electric power supplied from the power source connecting unit 11 to an emergency broadcasting function unit 6. The emergency broadcasting function unit 6 performs emergency broadcasting within the facility.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure generally relates to a power supply system and an emergency broadcast system. More specifically, the present disclosure relates to a power supply system that supplies power from an AC power source to a receiver function unit and an emergency broadcast function unit, and an emergency broadcast system including the power supply system. [Background technology]

[0002] The disaster prevention equipment described in Patent Document 1 includes a fire receiver (receiver function section) and an emergency broadcast device (emergency broadcast function section). The fire receiver receives an alarm signal from a fire sensor that detects and alerts a fire, and outputs a fire alarm. The emergency broadcast device makes a sensor alarm broadcast when it receives an alarm area identification signal from the fire receiver, and also makes a fire broadcast when it receives a fire confirmation signal from the fire receiver. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-230654 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned disaster prevention equipment, the fire receiver and the emergency broadcast device are each separately connected to an AC power source (external power source) and equipped with a power supply connection section for receiving power from the AC power source. Therefore, the above-mentioned disaster prevention facility has a drawback in that the disaster prevention facility becomes large in size.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide a power supply system that can be miniaturized, and an emergency broadcast system equipped with the power supply system. [Means for solving the problem]

[0006] A power supply system according to one embodiment of the present disclosure includes a power connection unit, a first power supply unit, and a second power supply unit. The power connection unit is connected to an external power source. The first power supply unit supplies power output from the power connection unit to a receiver function unit. The receiver function unit receives a detection result from a sensor disposed within a facility for detecting an abnormality occurring within the facility. The second power supply unit supplies power supplied from the power connection unit to an emergency broadcast function unit. The emergency broadcast function unit makes an emergency broadcast within the facility.

[0007] An emergency broadcast system according to one aspect of the present disclosure includes the power supply system, the receiver function unit, and the emergency broadcast function unit. Effect of the Invention

[0008] The power supply system and emergency broadcast system according to the present disclosure have the advantage of being able to be miniaturized. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a block diagram of a power supply system and an emergency broadcast system according to the first embodiment. [Diagram 2] FIG. 2 is a flowchart illustrating the operation of the power supply system. [Diagram 3] FIG. 3 is a block diagram of a power supply system and an emergency broadcast system according to a first modification of the first embodiment. [Figure 4] FIG. 4 is a flowchart illustrating the operation of the power supply system. [Diagram 5] FIG. 5 is a flowchart illustrating the operation of the power supply system according to the second modification of the first embodiment. [Figure 6] FIG. 6 is a flowchart illustrating the operation of the power supply system according to the third modification of the first embodiment. [Figure 7] FIG. 7 is a flowchart illustrating the operation of the power supply system according to the fourth modification of the first embodiment. [Figure 8] FIG. 8 is a block diagram of a power supply system and an emergency broadcast system according to a fifth modification of the first embodiment. [Figure 9] FIG. 9 is a flowchart illustrating the operation of the power supply system. [Figure 10] FIG. 10 is a block diagram of a power supply system and an emergency broadcast system according to a sixth modification of the first embodiment. [Figure 11] FIG. 11 is a flowchart illustrating the operation of the power supply system. [Figure 12] FIG. 12 is a flowchart illustrating the operation of the power supply system according to the seventh modification of the first embodiment. [Figure 13] FIG. 13 is a perspective view of a housing of a power supply system according to an eighth modification of the first embodiment. [Figure 14] FIG. 14 is a front view of the housing with the cover open. [Figure 15] FIG. 15 is a block diagram of a power supply system and an emergency broadcast system according to the second embodiment. [Figure 16] FIG. 16 is a flowchart illustrating the operation of the power supply system. [Figure 17] FIG. 17 is a block diagram of a power supply system and an emergency broadcast system according to a first modification of the second embodiment. [Figure 18] FIG. 18 is a flowchart illustrating the operation of the power supply system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] A power supply system 1 and an emergency broadcast system 100 according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0011] (Embodiment 1) (1) Overview First, with reference to FIG. 1, an overview of a power supply system 1 and an emergency broadcast system 100 according to a first embodiment will be described.

[0012] The power supply system 1 according to the first embodiment includes a power connection unit 11, a first power supply unit 12, and a second power supply unit 13. The power connection unit 11 is connected to an AC power supply 10 (external power supply). The AC power supply 10 is an example of an external power supply. The first power supply unit 12 supplies power supplied from the power connection unit 11 to the receiver function unit 5. The receiver function unit 5 receives a detection result from a sensor 2 that is arranged within a facility and is used to detect an abnormality occurring within the facility. The second power supply unit 13 supplies power supplied from the power connection unit 11 to the emergency broadcast function unit 6. The emergency broadcast function unit 6 makes an emergency broadcast within the facility.

[0013] According to this configuration, the power supply connection unit 11 can be shared between the receiver function unit 5 and the emergency broadcast function unit 6, so that the power supply system 1 can be made smaller in size.

[0014] Moreover, the emergency broadcast system 100 according to the first embodiment is a system for dealing with abnormalities (disasters, etc.) in facilities such as tenant buildings. Note that the "facility" referred to in this disclosure includes not only tenant buildings but also theaters, movie theaters, public halls, amusement parks, complexes, restaurants, department stores, schools, hotels, inns, hospitals, nursing homes, kindergartens, libraries, museums, art galleries, underground shopping malls, stations, airports, apartment complexes, etc. Also, the "disaster" referred to in this disclosure includes, for example, fires, gas leaks, earthquakes, flooding, etc.

[0015] The emergency broadcast system 100 includes a power supply system 1, a receiver function unit 5, and an emergency broadcast function unit 6.

[0016] According to this configuration, an emergency broadcast system 100 including the power supply system 1 can be provided.

[0017] (2) Detailed configuration (2.1) Emergency Broadcast System Configuration The configuration of an emergency broadcast system 100 including a power supply system 1 will be described with reference to FIG.

[0018] As shown in FIG. 1, the emergency broadcast system 100 includes a power supply system 1, a plurality of sensors 2, a receiver function unit 5, an emergency broadcast function unit 6, a plurality of speakers 7, a plurality of amplifiers 8, an emergency telephone device 9, and a microphone 3 for emergency broadcasts.

[0019] The multiple sensors 2 are placed at multiple different locations in the facility, detect abnormalities (e.g., fires) that occur at the multiple locations, and transmit the detection results to the receiver function unit 5. As an example, the multiple sensors 2 are fire sensors that detect the occurrence of a fire in the facility from at least one of smoke concentration and temperature.

[0020] The receiver function unit 5 is a function unit having the function of a receiver. As a function of the receiver, the receiver function unit 5 acquires detection results from each of the multiple detectors 2, and judges whether or not an abnormality has occurred in the facility based on the acquired detection results. More specifically, the receiver function unit 5 judges whether or not each detector 2 has detected a fire (abnormality) based on the acquired detection results. More specifically, the receiver function unit 5 judges which of multiple levels the level of the fire is based on the acquired detection results. The multiple levels include a safety level, a precursor level, and an alarm level. The safety level is a level corresponding to a state in which the detector 2 has not detected a precursor phenomenon that is a precursor of a fire. The precursor level is a level corresponding to a state in which the detector 2 has detected a precursor phenomenon that is a precursor of a fire. The alarm level is a level corresponding to a state in which the detector 2 has detected a fire and is operating. The detector 2 being operating indicates that the detector 2 transmits the detection result to the receiver unit 5 when the detector 2 detects the occurrence of a fire.

[0021] The emergency broadcast function unit 6 is a function unit having an emergency broadcast function. As an emergency broadcast function, the emergency broadcast function unit 6 causes the multiple speakers 7 to make an emergency broadcast based on the judgment result of the receiver function unit 5. More specifically, when the receiver function unit 5 judges that the level of the fire is a precursor level, the emergency broadcast function unit 6 causes the multiple speakers 7 to make, for example, an attention broadcast to call attention as an emergency broadcast. Also, when the receiver function unit 5 judges that the level of the fire is an alarm level, the emergency broadcast function unit 6 causes the multiple speakers 7 to make, for example, an alarm broadcast regarding the occurrence of a fire as an emergency broadcast. The alarm broadcast includes, for example, broadcasting information indicating that the detector 2 has detected a fire and information regarding response actions to deal with the occurred fire.

[0022] The emergency broadcast unit 6 has an emergency broadcast function of outputting the voice input to the emergency broadcast microphone 3 from a plurality of speakers 7.

[0023] The multiple speakers 7 are output devices for making emergency broadcasts under the control of the emergency broadcast function unit 6 when an abnormality (for example, a fire) occurs within the facility. The multiple speakers 7 are arranged at multiple different locations within the facility.

[0024] The multiple amplifiers 8 are amplifiers for amplifying the outputs of the multiple speakers 7. The multiple amplifiers 8 correspond one-to-one to the multiple speakers 7, and amplify the outputs of the corresponding speakers 7. The amplifiers 8 amplify the emergency broadcast signals output from the emergency broadcast function unit 6 to the corresponding speakers 7, and output the amplified emergency broadcast signals to the corresponding speakers 7.

[0025] The emergency telephone device 9 is a communication device capable of communicating (e.g., making a call) with multiple (e.g., two) telephone handsets 101, 102 arranged in the facility. The emergency telephone device 9 is used for the purpose of notifying or confirming the circumstances of the abnormality when any of the multiple sensors 2 detects an abnormality. The emergency telephone device 9 is used, for example, when a manager checks the circumstances of the abnormality with facility users or facility staff who are present at the scene where the abnormality occurred. The multiple telephone handsets 101, 102 are arranged in multiple different locations in the facility. The emergency telephone device 9 is capable of making a call between the multiple telephone handsets 101, 102.

[0026] More specifically, the emergency telephone device 9 includes a telephone base unit 91 and an emergency telephone function unit 93. The telephone base unit 91 corresponds to a plurality of telephone handsets 101, 102 and is a base unit for making calls between the corresponding telephone handsets. The emergency telephone function unit 93 is a control device that controls calls between the telephone base unit 91 and the plurality of telephone handsets 101, 102.

[0027] The emergency broadcast microphone 3 is a sound collecting device for collecting the voice of the user. The voice collected by the microphone 3 is output from the multiple speakers 7. As a result, when a user wishes to convey a certain matter to people at various locations in the facility during an emergency broadcast, the certain matter can be input into the microphone 13 by voice, and the certain matter can be conveyed to people at various locations in the facility by voice output from the multiple speakers 7. The microphone 3 is controlled by, for example, the emergency broadcast function unit 6.

[0028] The power supply system 1 supplies power to each component (such as the receiver function unit 5, the emergency broadcast function unit 6, and the emergency telephone device 9) of the emergency broadcast system 100. The power supply system 1 converts AC power supplied from an AC power source 10 (such as a commercial power source) into DC power, transforms the converted DC power to a predetermined voltage, and supplies the transformed DC power to each of the above-mentioned function units.

[0029] (2.2) Power supply system configuration As shown in FIG. 1, the power supply system 1 includes a power source connection unit 11, a first power supply unit 12, a second power supply unit 13, a first storage battery 15, a second storage battery 16, a first selection unit 17, a second selection unit 18, a voltage measurement unit 19, and a control unit 20.

[0030] The power supply connection unit 11 is connected to the AC power supply 10, and AC power supplied from the AC power supply 10 is input to the power supply connection unit 11. The power supply connection unit 11 outputs (distributes) the AC power supplied from the AC power supply to the first power supply unit 12, the second power supply unit 13, the first storage battery 15, and the second storage battery 16. The power supply connection unit 11 is a power supply connection unit common to the first power supply unit 12, the second power supply unit 13, the first storage battery 15, and the second storage battery 16. The power supply connection unit 11 has an input unit 11a, an output unit 11b, and a power conversion unit. The input unit 11a is connected to the AC power supply 10. The output unit 11b is connected to the first power supply unit 12, the second power supply unit 13, the first storage battery 15, and the second storage battery 16. The power conversion unit converts AC power input from the AC power source 10 to the input unit 11a into DC power, and supplies the converted DC power from the output unit 11b to the first power supply unit 12, the second power supply unit 13, the first storage battery 15, and the second storage battery 16.

[0031] In the first embodiment, the power supply connection unit 11 is configured to include a power conversion unit, but the power conversion unit may be configured separately from the power supply connection unit 11. In this case, the first power supply unit 12, the first storage battery 15 (including a charging circuit), the second power supply unit 13, and the second storage battery 16 (including a charging circuit) each include a power conversion unit.

[0032] The first power supply unit 12 supplies DC power supplied from the power supply connection unit 11 to the receiver function unit 5 and the emergency telephone function unit 93. More specifically, the first power supply unit 12 transforms the DC power supplied from the power supply connection unit 11 to a voltage suitable for the receiver function unit 5 and the emergency telephone function unit 93, and supplies the transformed DC power to the receiver function unit 5 and the emergency telephone function unit 93.

[0033] The second power supply unit 13 supplies the DC power supplied from the power supply connection unit 11 to the emergency broadcast function unit 6. More specifically, the second power supply unit 13 transforms the DC power supplied from the power supply connection unit 11 to a voltage suitable for the emergency broadcast function unit 6, and supplies the transformed DC power to the emergency broadcast function unit 6.

[0034] The first storage battery 15 is a storage battery that can be repeatedly charged and discharged by being charged, and is composed of, for example, an Electrical Double Layer Capacitor (EDLC) or a lithium ion battery. The first storage battery 15 is a power source for backing up the power supplied from the first power supply unit 12 to the receiver function unit 5. In other words, the first storage battery 15 is a power source that can supply power to the receiver function unit 5 when the AC power source 10 fails. The first storage battery 15 is charged by the power output from the power source connection unit 11.

[0035] The second storage battery 16 is a storage battery that can be repeatedly charged and discharged by charging, and is, for example, an EDLC or a lithium ion battery. The second storage battery 16 is a power source for backing up the power supplied from the second power supply unit 13 to the emergency broadcast function unit 6. In other words, the second storage battery 16 is a power source that can supply power to the emergency broadcast function unit 6 when the AC power source 10 fails. The second storage battery 16 is charged by the power output from the power source connection unit 11.

[0036] In the first embodiment, the first storage battery 15 includes a charging circuit for charging the first storage battery 15. Also, the second storage battery 16 includes a charging circuit for charging the second storage battery 16.

[0037] The first selection unit 17 selects the first supply source that supplies power to the receiver function unit 5 from among the first power supply unit 12 and the first storage battery 15. The first selection unit 17 is a changeover switch controlled by the control unit 20. The first selection unit 17 has a common terminal 17a, a first selection terminal 17b, and a second selection terminal 17c. The common terminal 17a is connected to a power input unit of the receiver function unit 5. The common terminal 17a is selectively connected to one of the first selection terminal 17b and the second selection terminal 17c. The first selection terminal 17b is connected to an output unit of the first power supply unit 12. The second selection terminal 17c is connected to an output unit of the first storage battery 15.

[0038] When the AC power supply 10 is normal, the first selection unit 17 selectively connects the common terminal 17a to the first selection terminal 17b under the control of the control unit 20. That is, the first selection unit 17 selects the first power supply unit 12 as the first supply source. As a result, power from the first power supply unit 12 is supplied to the receiver function unit 5. Furthermore, when the AC power supply 10 fails, the first selection unit 17 selectively connects the common terminal 17a to the second selection terminal 17c under the control of the control unit 20. That is, the first selection unit 17 selects the first storage battery 15 as the first supply source. As a result, power from the first storage battery 15 is supplied to the receiver function unit 5.

[0039] The second selection unit 18 selects the second supply source that supplies power to the emergency broadcast function unit 6 from the second power supply unit 13 and the second storage battery 16. The second selection unit 18 also supplies power to the microphone 3, the amplifier 8, etc. through the emergency broadcast function unit 6. The second selection unit 18 is a changeover switch controlled by the control unit 20. The second selection unit 18 has a common terminal 18a, a first selection terminal 18b, and a second selection terminal 18c. The common terminal 18a is connected to the power input unit of the emergency broadcast function unit 6. The common terminal 18a is selectively connected to one of the first selection terminal 18b and the second selection terminal 18c. The first selection terminal 18b is connected to the output unit of the second power supply unit 13. The second selection terminal 18c is connected to the output unit of the second storage battery 16.

[0040] When the AC power supply 10 is normal, the second selection unit 18 selectively connects the common terminal 18a to the first selection terminal 18b under the control of the control unit 20. That is, the second selection unit 18 selects the second power supply unit 13 as the second supply source. As a result, power from the second power supply unit 13 is supplied to the emergency broadcast function unit 6. Also, when the AC power supply 10 fails, the second selection unit 18 selectively connects the common terminal 18a to the second selection terminal 18c under the control of the control unit 20. That is, the second selection unit 18 selects the second storage battery 16 as the second supply source. As a result, power from the second storage battery 16 is supplied to the emergency broadcast function unit 6, the microphone 3, the amplifier 8, etc.

[0041] The voltage measuring unit 19 measures the voltage (DC voltage) at the output unit 11b of the power supply connection unit 11, thereby measuring the voltage (DC voltage) obtained by converting the output voltage (AC voltage) of the AC power supply 10 into a DC voltage.

[0042] The control unit 20 is configured, for example, by a microcomputer having a processor and a memory. That is, the control unit 20 is realized by a computer system having a processor and a memory. The processor executes an appropriate program, causing the computer system to function as the control unit 20. The program may be pre-recorded in the memory, or may be provided via a telecommunication line such as the Internet, or recorded on a non-transitory recording medium such as a memory card. The control unit 20 is configured to perform digital control using a microcomputer, but may also be configured to perform analog control without using a microcomputer.

[0043] The control unit 20 controls the first selection unit 17 and the second selection unit 18 based on the measurement result of the voltage measurement unit 19 (that is, voltage information related to the output voltage of the AC power supply 10).

[0044] More specifically, the control unit 20 judges whether the AC power supply 10 is normal or not based on the measurement result of the voltage measurement unit 19. In other words, the control unit 20 judges whether the AC power supply 10 is normal or not depending on whether the DC voltage conversion value of the output voltage of the AC power supply 10 measured by the voltage measurement unit 19 is within a predetermined voltage range or not. Specifically, the control unit 20 judges that the AC power supply 10 is normal when the DC voltage conversion value of the output voltage of the AC power supply 10 measured by the voltage measurement unit 19 is within the predetermined voltage range. In addition, the control unit 20 judges that the AC power supply 10 is not normal (i.e., a fault has occurred in the AC power supply 10) when the DC voltage conversion value of the output voltage of the AC power supply 10 measured by the voltage measurement unit 19 is not within the predetermined voltage range. Note that "the AC power supply 10 is normal" means that the AC power supply 10 has no fault and that the power supply from the AC power supply 10 to the power supply connection unit 11 has not stopped due to a fault, deterioration, disconnection, or the like of the AC power supply 10.

[0045] When the control unit 20 determines that the AC power supply 10 is normal, the control unit 20 controls the first selection unit 17 so that the first selection unit 17 selects the first power supply unit 12 as the first supply source. As a result, power from the first power supply unit 12 is supplied to the receiver function unit 5. When the control unit 20 determines that the AC power supply 10 is normal, the control unit 20 controls the second selection unit 18 so that the second selection unit 18 selects the second power supply unit 13 as the second supply source. As a result, power from the second power supply unit 13 is supplied to the emergency broadcast function unit 6.

[0046] (3) Operation Description The operation of the power supply system 1 will be described with reference to Fig. 2. In the following description, an example will be given in which the AC power supply 10 is initially normal and then becomes abnormal.

[0047] The power supply connection unit 11 receives power from the AC power supply 10 (S1), converts the received AC power to DC power (S2), and outputs (distributes) the converted DC power to the first power supply unit 12, the second power supply unit 13, the first storage battery 15, and the second storage battery 16 (S3). As a result, the first power supply unit 12 transforms the DC power output from the power supply connection unit 11 to a voltage suitable for the receiver function unit 5 and the emergency telephone function unit 93, and outputs the transformed DC power to the first selection unit 17. The second power supply unit 13 transforms the DC power output from the power supply connection unit 11 to a voltage suitable for the emergency broadcast function unit 6, and outputs the transformed DC power to the second selection unit 18. The first storage battery 15 and the second storage battery 16 are charged by the DC power output from the power supply connection unit 11.

[0048] The control unit 20 also determines whether the AC power supply 10 is normal (S4). When the control unit 20 determines that the AC power supply 10 is normal (S4: Yes), the control unit 20 controls the first selection unit 17 so that the first selection unit 17 selects the first power supply unit 12 as the first supply source (S5). As a result, the first selection unit 17 supplies power from the first power supply unit 12 to the receiver function unit 5 and the emergency call function unit 93. The receiver function unit 5 operates with the power from the first power supply unit 12.

[0049] Furthermore, when the control unit 20 determines that the AC power supply 10 is normal (S4: Yes), the control unit 20 controls the second selection unit 18 so that the second selection unit 18 selects the second power supply unit 13 as the second supply source (S6). As a result, the second selection unit 18 supplies power from the second power supply unit 13 to the emergency broadcast function unit 6. Then, the emergency broadcast function unit 6 operates with the power from the second power supply unit 13. Then, the process returns to step S4.

[0050] On the other hand, when the control unit 20 determines that the AC power supply 10 is not normal (i.e., a failure has occurred in the AC power supply 10) (S4: No), it controls the first selection unit 17 so that the first selection unit 17 selects the first storage battery 15 as the first supply source (S7). As a result, the first selection unit 17 supplies power from the first storage battery 15 to the receiver function unit 5 and the emergency telephone function unit 93. The receiver function unit 5 then operates with the power from the first storage battery 15. In this way, even if a failure occurs in the AC power supply 10 and the supply of power output from the first power supply unit 12 stops, the operation of the receiver function unit 5 and the emergency telephone function unit 93 can be continued with the power from the first storage battery 15.

[0051] Furthermore, when the control unit 20 determines that the AC power supply 10 is not normal (S4: No), it controls the second selection unit 18 so that the second selection unit 18 selects the second storage battery 16 as the second supply source (S8). As a result, the second selection unit 18 supplies power from the second storage battery 16 to the emergency broadcast function unit 6. The emergency broadcast function unit 6 then operates with the power from the second storage battery 16. In this way, even if a failure occurs in the AC power supply 10 and the supply of power output from the second power supply unit 13 stops, the operation of the emergency broadcast function unit 6 can be continued with the power from the second storage battery 16. Then, the process returns to step S4.

[0052] (4) Effects The power supply system 1 according to the first embodiment includes a power connection unit 11, a first power supply unit 12, and a second power supply unit 13. The power connection unit 11 is connected to an AC power supply 10. The first power supply unit 12 supplies power output from the power connection unit 11 to the receiver function unit 5. The receiver function unit 5 receives a detection result from a detector 2 that is arranged in a facility and detects an abnormality occurring in the facility. The second power supply unit 13 supplies power supplied from the power connection unit 11 to the emergency broadcast function unit 6. The emergency broadcast function unit 6 makes an emergency broadcast within the facility. According to this configuration, the power connection unit 11 can be shared between the receiver function unit 5 and the emergency broadcast function unit 6, thereby making it possible to reduce the size.

[0053] Moreover, the power supply system 1 according to the first embodiment includes a first selection unit 17 and a second selection unit 18. The first selection unit 17 selects a first supply source that supplies power to the receiver function unit 5 from among the first power supply unit 12 and the first storage battery 15. The second selection unit 18 selects a second supply source that supplies power to the emergency broadcast function unit 6 from among the second power supply unit 13 and the second storage battery 16.

[0054] According to this configuration, in the event of a failure of the AC power supply 10, the power supply sources for the receiver function unit 5 and the emergency broadcast function unit 6 can be secured by the first storage battery 15 and the second storage battery 16, respectively. Also, since the storage battery (first storage battery 15) for the receiver function unit 5 and the storage battery (second storage battery 16) for the emergency broadcast function unit 6 are separate, the minimum necessary power can be secured for each of the receiver function unit 5 and the emergency broadcast function unit 6.

[0055] Moreover, the power supply system 1 according to the first embodiment further includes a first storage battery 15 and a second storage battery 16. According to this configuration, the power supply system 1 including the first storage battery 15 and the second storage battery 16 can be provided.

[0056] In the power supply system 1 according to the first embodiment, the first power supply unit 12 supplies power to an emergency telephone function unit 93 that communicates with telephone handsets 101 and 102 installed in the facility. With this configuration, power can be supplied to the emergency telephone function unit 93 in addition to the receiver function unit 5 and the emergency broadcast function unit 6.

[0057] Moreover, the emergency broadcast system 100 according to the first embodiment includes a power supply system 1, a receiver function unit 5, and an emergency broadcast function unit 6. According to this configuration, the emergency broadcast system 100 including the power supply system 1 can be provided.

[0058] (5) Variations Below, we will list some modified examples of the embodiment 1. The modified examples explained below can be applied in appropriate combinations.

[0059] (5.1) Variation 1 The power supply system 1 according to the first modification will be described with reference to FIGS.

[0060] The power supply system 1 of variant example 1 is configured in the same manner as the power supply system 1 of embodiment 1, except that the second storage battery 16 is shared by both the receiver function unit 5 and the emergency broadcast function unit 6.

[0061] (5.1.1) Configuration Description 3, in the power supply system 1 according to the first modification, the second storage battery 16 is shared by the receiver function unit 5 and the emergency broadcast function unit 6. More specifically, the first selection unit 17A of the first modification can select the first supply source that supplies power to the receiver function unit 5 from among the first power supply unit 12, the first storage battery 15, and the second storage battery 16. The second selection unit 18A of the first modification can select from the second power supply unit 13 and the second storage battery 16, similar to the second selection unit 18 of the first embodiment.

[0062] The first selection unit 17A and the second selection unit 18A are configured by the selection unit 30. That is, the power supply system 1 according to the first modification example 1 includes the selection unit 30.

[0063] The selection unit 30 has a first common terminal 30a, a second common terminal 30b, a first selection terminal 30c, a second selection terminal 30d, a third selection terminal 30e, and a fourth selection terminal 30f. The first common terminal 30a can be selectively connected to any one of the first selection terminal 30c, the second selection terminal 30d, and the third selection terminal 30e. The first common terminal 30a is connected to a power input unit of the receiver function unit 5. The second common terminal 30b can be selectively connected to any one of the third selection terminal 30e and the fourth selection terminal 30f. The second common terminal 30b is connected to a power input unit of the emergency broadcast function unit 6. The first selection terminal 30c is connected to an output unit of the first power supply unit 12. The second selection terminal 30d is connected to an output unit of the first storage battery 15. The third selection terminal 30e is connected to an output unit of the second storage battery 16. The fourth selection terminal 30f is connected to an output unit of the second power supply unit 13. The selection unit 30 is controlled by the control unit 20 .

[0064] The first selection unit 17A is composed of a first common terminal 30a, a first selection terminal 30c, a second selection terminal 30d, and a third selection terminal 30e of the selection unit 30. The first selection unit 17A selects a first supply source that supplies power to the receiver function unit 5 from among the first power supply unit 12, the first storage battery 15, and the second storage battery 16 by selectively connecting the first common terminal 30a to the first selection terminal 30c, the second selection terminal 30d, and the third selection terminal 30e.

[0065] When selecting the first storage battery 15 and the second storage battery 16, the first selection unit 17A, for example, first selects the first storage battery 15 and supplies power from the first storage battery 15 to the receiver function unit 5. Then, when the first storage battery 15 runs out of power, the first selection unit 17A switches from the first storage battery 15 to the second storage battery 16 and supplies power from the second storage battery 16 to the receiver function unit 5.

[0066] The second selection unit 18A is composed of the second common terminal 30b, the third selection terminal 30e, and the fourth selection terminal 30f of the selection unit 30. The second selection unit 18A selects the second supply source that supplies power to the emergency broadcast function unit 6 from the second power supply unit 13 and the second storage battery 16 by selectively connecting the second common terminal 30b to the third selection terminal 30e or the fourth selection terminal 30f.

[0067] The first selection unit 17A and the second selection unit 18A select the first supply source and the second supply source so that power from the second storage battery 16 is supplied preferentially to the receiver function unit 5 over the emergency broadcast function unit 6. More specifically, when the first selection unit 17A and the second selection unit 18A simultaneously select the second storage battery 16, the first selection unit 17A gives priority to selecting the second storage battery 16. In this case, the second selection unit 18A can select the second power supply unit 13 as the second supply source.

[0068] The control unit 20 measures the remaining capacity of the first storage battery 15. The control unit 20 controls the first selection unit 17 and the second selection unit 18 based on the remaining capacity of the first storage battery 15.

[0069] (5.1.2) Operation Description The operation of the power supply system 1 according to the first modification will be described with reference to FIG.

[0070] When the control unit 20 determines that the AC power supply 10 is normal (S20: Yes), the first selection unit 17A selects the first power supply unit 12 as the first supply source under the control of the control unit 20 (S21). As a result, the first selection unit 17A supplies power from the first power supply unit 12 to the receiver function unit 5. Also, the second selection unit 18A selects the second power supply unit 13 as the second supply source under the control of the control unit 20 (S22). As a result, the second selection unit 18A supplies power from the second power supply unit 13 to the emergency broadcast function unit 6. Then, the process returns to step S20.

[0071] Furthermore, when the control unit 20 determines that the AC power supply 10 is not normal (S20: No), the first selection unit 17A selects the first storage battery 15 as the first supply source based on the control of the control unit 20 (S23). As a result, the first selection unit 17A supplies power from the first storage battery 15 to the receiver function unit 5. Furthermore, the second selection unit 18A selects the second storage battery 16 as the second supply source based on the control of the control unit 20 (S24). As a result, the second selection unit 18A supplies power from the second storage battery 16 to the emergency broadcast function unit 6.

[0072] Then, the control unit 20 judges whether the remaining amount of the first storage battery 15 is less than a predetermined remaining amount (for example, 1% remaining amount) (i.e., whether the remaining amount is substantially empty) (S25). If the control unit 20 judges that the remaining amount of the first storage battery 15 is not less than the predetermined remaining amount (S25: No), the process returns to step S23. On the other hand, if the control unit 20 judges that the remaining amount of the first storage battery 15 is less than the predetermined remaining amount (S25: Yes), the first selection unit 17A switches the first supply source from the first storage battery 15 to the second storage battery 16 under the control of the control unit 20 (S26). As a result, even if the remaining amount of the first storage battery 15 becomes the predetermined remaining amount (for example, 1%), the first selection unit 17A maintains the power supply to the receiver function unit 5 by supplying power from the second storage battery 16 to the receiver function unit 5. In other words, the receiver function unit 5 continues to operate using the second storage battery 16 even if the first storage battery 15 runs out of power.

[0073] Then, the second selection unit 18A switches the second supply source from the second storage battery 16 to the second power supply unit 13 under the control of the control unit 20 (S27). In this way, when the first selection unit 17A and the second selection unit 18A simultaneously select the second storage battery 16, the first selection unit 17A preferentially selects the second storage battery 16. Then, the process returns to step S20.

[0074] (5.1.3) Effects According to the first modification, the first selection unit 17A selects the first supply source from among the first power supply unit 12, the first storage battery 15, and the second storage battery 16. The first selection unit 17A and the second selection unit 18A select the first supply source and the second supply source such that power from the second storage battery 16 is supplied preferentially to the receiver function unit 5 over the emergency broadcast function unit 6. According to this configuration, the receiver function unit 5 can be operated with priority over the emergency broadcast function unit 6.

[0075] (5.2) Variation 2 In the first modification, when the first selection unit 17A selects the second storage battery 16 as the first power supply source (S26 in FIG. 4), the second selection unit 18A cannot select the second storage battery 16 as the second power supply source (S27 in FIG. 4). In contrast, in the second modification, as shown in FIG. 5, when the first selection unit 17A selects the first storage battery 15 as the first supply source (S24A in FIG. 5), the second selection unit 18A may not be able to select the second storage battery 16 as the second supply source. The configuration of the second modification is the same as the configuration of the first modification (FIG. 3). The operation of the second modification will be described in detail with reference to FIG. 5.

[0076] In the following description, only the processing steps that are different from the operation of Modification 1 (see FIG. 4) will be described, and the processing steps that are the same as those in the operation of Modification 1 will be given the same step numbers and descriptions thereof will be omitted.

[0077] In the second modification, in step S23, the first selection unit 17A selects the first storage battery 15 as the first power supply source. Then, the second selection unit 18B selects the second power supply unit 13 without selecting the second storage battery 16 (S24A). That is, once the first selection unit 17A selects the first storage battery 15, the second selection unit 18A cannot select the second storage battery 16. Then, when the remaining amount of the first storage battery 15 falls below a predetermined remaining amount (e.g., 1%) (i.e., the remaining amount is practically zero) (S25: Yes), the first selection unit 17A switches the first power supply source from the first storage battery 15 to the second storage battery 16 (S26). Then, the process returns to step S20.

[0078] In the second modification, once the first selection unit 17A selects the first storage battery 15, the second selection unit 18A is unable to select the second storage battery 16. Therefore, in the second modification, power from the second storage battery 16 can be supplied preferentially to the first selection unit 17A (receiver function unit 5) over the second selection unit 18A (emergency broadcast function unit 6) even more than in the first modification.

[0079] (5.3) Variation 3 In the second modification, once the first selection unit 17A selects the first storage battery 15 as the first supply source (S23 in FIG. 5), the second selection unit 18A cannot select the second storage battery 16 as the second supply source (S24A in FIG. 5). In contrast, in the third modification, as shown in FIG. 6, when the first selection unit 17A selects the first storage battery 15 as the first supply source and the remaining capacity of the first storage battery 15 is less than a first predetermined remaining capacity (for example, 60%) (S25B in FIG. 6), the second selection unit 18A cannot select the second storage battery 16 as the second supply source (S26B in FIG. 6). The configuration of the third modification is the same as the configuration of the first and second modifications (FIG. 3). The operation of the third modification will be described in detail with reference to FIG. 6.

[0080] In the following description, only the processing steps that are different from the operation of Modification 1 (see FIG. 4) will be described, and the same processing steps as those in the operation of Modification 1 will be given the same step numbers and descriptions thereof may be omitted.

[0081] In the third modification, when the control unit 20 determines that the AC power supply 10 is not normal (S20: No), the first selection unit 17A selects the first storage battery 15 as the first supply source based on the control of the control unit 20 (S23). As a result, the first selection unit 17A supplies power from the first storage battery 15 to the receiver function unit 5. Also, the second selection unit 18A selects the second storage battery 16 as the second supply source based on the control of the control unit 20 (S24). As a result, the second selection unit 18A supplies power from the second storage battery 16 to the emergency broadcast function unit 6.

[0082] Then, the control unit 20 determines whether the remaining amount of the first storage battery 15 is less than a first predetermined remaining amount (e.g., 60% remaining amount) (i.e., whether the remaining amount has decreased to a certain extent) (S25B). If the control unit 20 determines that the remaining amount of the first storage battery 15 is not less than the first predetermined remaining amount (S25B: No), the process returns to step S23. On the other hand, if the control unit 20 determines that the remaining amount of the first storage battery 15 is less than the first predetermined remaining amount (S25B: Yes), the second selection unit 18A switches the second supply source from the second storage battery 16 to the second power supply unit 13 under the control of the control unit 20 (S26B). As a result, the second selection unit 18A can select the second storage battery 16 as the second supply source until the remaining charge of the first storage battery 15 falls below the first predetermined remaining charge, and when the remaining charge of the first storage battery 15 falls below the first predetermined remaining charge, the second selection unit 18A cannot select the second storage battery 16 as the second supply source. In this case, the second selection unit 18A supplies power from the second power supply unit 13 to the emergency broadcast function unit 6.

[0083] Then, the control unit 20 judges whether the remaining amount of the first storage battery 15 is less than a second predetermined remaining amount (for example, 1%) that is lower than the first predetermined remaining amount (i.e., whether the remaining amount is substantially zero) (S27B). Then, when the control unit 20 judges that the remaining amount of the first storage battery 15 is not less than the second predetermined remaining amount (S27B: No), the process returns to step S27B. On the other hand, when the control unit 20 judges that the remaining amount of the first storage battery 15 is less than the second predetermined remaining amount (S27B: Yes), the first selection unit 17A switches the first supply source from the first storage battery 15 to the second storage battery 16 under the control of the control unit 20 (S28B). As a result, when the remaining amount of the first storage battery 15 becomes less than the second predetermined remaining amount (for example, 1%), the operation of the receiver function unit 5 can be continued by supplying power from the second storage battery 16 to the receiver function unit 5. Then, the process returns to step S20.

[0084] In the third modification, the second selection unit 18A can select the second storage battery 16 as the second supply source until the remaining amount of the first storage battery 15 falls below a first predetermined remaining amount (e.g., 60%) (i.e., until the remaining amount decreases to a certain extent), and therefore, power from the second storage battery 16 can be supplied to the emergency broadcast function unit 6. Furthermore, in this case, when the remaining amount of the first storage battery 15 falls to a second predetermined remaining amount (e.g., 1%) that is lower than the first predetermined remaining amount (i.e., the remaining amount is substantially zero), the first selection unit 17A can switch the first supply source from the first storage battery 15 to the second storage battery 16 and supply power from the second storage battery 16 to the receiver function unit 5. In the third modification, more power can be supplied from the second storage battery 16 to the emergency broadcast function unit 6 than in the second modification.

[0085] (5.4) Variation 4 In Modification 1, when the first selection unit 17C selects the second storage battery 16 (S26 in FIG. 4), the second selection unit 18C cannot simultaneously select the second storage battery 16 (S27 in FIG. 4). In contrast, as shown in FIG. 7, in Modification 4, even if the first selection unit 17A selects the second storage battery 16 (S26), the second selection unit 18A can simultaneously select the second storage battery 16 (S27A). Modification 5 will be described in detail below.

[0086] The configuration of the power supply system 1 according to the modified example 4 is similar to the configuration (FIG. 3) of the power supply system 1 according to the modified example 1. In the following explanation, the points different from the modified example 1 will be explained, and the same reference numerals will be given to the same configuration as the modified example 1, and the explanation thereof may be omitted.

[0087] In the fourth modification, the first selection unit 17A and the second selection unit 18A select the first supply source and the second supply source so that power from the second storage battery 16 is preferentially supplied to the receiver function unit 5 rather than to the emergency broadcast function unit 6. More specifically, when it becomes necessary for the first selection unit 17A to select the second storage battery 16, the first selection unit 17A can switch the first power supply destination from the first storage battery 15 or the first power supply unit 12 to the second storage battery 16 even if the second selection unit 18A selects the second storage battery 16. That is, when it becomes necessary for the first selection unit 17A to select the second storage battery 16, the first selection unit 17A can select the second storage battery 16 even if the second selection unit 18A selects the second storage battery 16. In this case, the second selection unit 18A can simultaneously select the second storage battery 16 as the second supply source.

[0088] The operation of the power supply system 1 according to the modified example 4 will be described with reference to Fig. 7. In the following description, only the processing steps different from the operation of the modified example 1 (see Fig. 4) will be described, and the same processing steps as those in the operation of the modified example 1 will be given the same step numbers and the description thereof may be omitted.

[0089] The control unit 20 determines whether the remaining amount of the first storage battery 15 is less than a predetermined remaining amount (e.g., 1% remaining amount) (i.e., whether the remaining amount is substantially zero) (S25). If the control unit 20 determines that the remaining amount of the first storage battery 15 is not less than the predetermined remaining amount (S25: No), the process returns to step S23. On the other hand, if the control unit 20 determines that the remaining amount of the first storage battery 15 is less than the predetermined remaining amount (S25: Yes), the first selection unit 17A switches the first supply source from the first storage battery 15 to the second storage battery 16 under the control of the control unit 20 (S26). As a result, even if the remaining amount of the first storage battery 15 becomes the predetermined remaining amount (e.g., 1%), the first selection unit 17A maintains the power supply to the receiver function unit 5 by supplying power from the second storage battery 16 to the receiver function unit 5. In other words, the receiver function unit 5 continues to operate using the second storage battery 16 even if the first storage battery 15 runs out of power.

[0090] Then, the second selection unit 18A switches the second supply source from maintaining the second storage battery 16 to the second power supply unit 13 based on the control of the control unit 20 (S27A). That is, in this case, the first selection unit 17A and the second selection unit 18A simultaneously select the second storage battery 16. In this way, when it becomes necessary for the first selection unit 17A to select the second storage battery 16, the first selection unit 17A can select the second storage battery 16 even when the second selection unit 18A selects the second storage battery 16. Then, the process returns to step S20.

[0091] According to the fourth modification, when the second selection unit 18A selects the second storage battery 16 as the second supply source, the first selection unit 17A switches the first supply source to the second storage battery 16 and selects the second storage battery 16 simultaneously with the second selection unit 18A. With this configuration, when it becomes necessary for the first selection unit 17A to select the second storage battery 16, the first selection unit 17A can select the second storage battery 16 simultaneously with the second selection unit 18A. This makes it possible to maintain the supply of power to the receiver function unit 5 from the second storage battery 16 while maintaining the supply of power to the emergency broadcast function unit 6 from the second storage battery 16.

[0092] (5.5) Variation 5 The power supply system 1 according to the fifth modification will be described with reference to FIGS.

[0093] The power supply system 1 according to the fifth modification has the same configuration as the power supply system 1 according to the first embodiment, except that the power supply system 1 according to the fifth modification further includes a third selection unit 40. The third selection unit 40 selects a supply destination to which the power from the second storage battery 16 is to be supplied from among the first selection unit 17C and the second selection unit 18C.

[0094] (5.5.1) Configuration Description As shown in FIG. 8, the first selection unit 17C of the fifth modification further includes a third selection terminal 17d in the first selection unit 17 of the first embodiment. That is, the first selection unit 17C includes a common terminal 17a, a first selection terminal 17b, a second selection terminal 17c, and a third selection terminal 17d. The common terminal 17a is selectively connected to any one of the first selection terminal 17b, the second selection terminal 17c, and the third selection terminal 17d. The common terminal 17a is connected to the power supply input unit of the receiver function unit 5. The first selection terminal 17b is connected to the output unit of the first power supply unit 12. The second selection terminal 17c is connected to the output unit of the first storage battery 15. The third selection terminal 17d is connected to the first selection terminal 40b of the third selection unit 40. The first selection unit 17C selectively connects the common terminal 17a to one of the first selection terminal 17b, the second selection terminal 17c, and the third selection terminal 17d, thereby selecting one of the first power supply unit 12, the first storage battery 15, and the third selection unit 40 as a first supply source that supplies power to the receiver function unit 5. The first selection unit 17C is controlled by the control unit 20.

[0095] The second selection unit 18C of the fifth modification has a common terminal 18a, a first selection terminal 18b, and a second selection terminal 18c, similar to the second selection unit 18 of the first embodiment. The common terminal 18a is connected to the power input unit of the emergency broadcast function unit 6. The common terminal 18a is selectively connected to one of the first selection terminal 18b and the second selection terminal 18c. The first selection terminal 18b is connected to the output unit of the second power supply unit 13. The second selection terminal 18c is connected to the output unit of the second storage battery 16. The second selection unit 18C is controlled by the control unit 20. The second selection unit 18C selectively connects the common terminal 18a to one of the first selection terminal 18b and the second selection terminal 18c, thereby selecting one of the second power supply unit 13 and the third selection unit 40 as a second supply source that supplies power to the emergency broadcast function unit 6. The second selection unit 18C is controlled by the control unit 20.

[0096] The third selection unit 40 has a common terminal 40a, a first selection terminal 40b, and a second selection terminal 40c. The common terminal 40a is selectively connected to one of the first selection terminal 40b and the second selection terminal 40c. The common terminal 40a is connected to the output unit of the second storage battery 16. The first selection terminal 40b is connected to the third selection terminal 17d of the first selection unit 17C. The second selection terminal 40c is connected to the second selection terminal 18c of the second selection unit 18C. The third selection unit 40 selectively connects the common terminal 40a to one of the first selection terminal 40b and the second selection terminal 40c, thereby selecting one of the first selection unit 17C (receiver function unit 5) and the second selection unit 18C (emergency broadcast function unit 6) as a supply destination to which power from the second storage battery 16 is supplied. The third selection unit 40 is controlled by the control unit 20.

[0097] The third selection unit 40 selects the supply destination so that power from the second storage battery 16 is preferentially supplied to the receiver function unit 5 rather than to the emergency broadcast function unit 6. More specifically, when the first selection unit 17C selects the first storage battery 15 as the first supply source that supplies power to the receiver function unit 5, the third selection unit 40 selects the first selection unit 17C as the supply destination. As a result, even if the second selection unit 18C selects the third selection unit 40 as the second supply source, power from the second storage battery 16 is not supplied to the second selection unit 18C (emergency broadcast function unit 6). Only when the first selection unit 17C selects the third selection unit 40 as the first supply source, power from the second storage battery 16 is supplied to the first selection unit 17C (receiver function unit 5).

[0098] (5.5.2) Operation Description The operation of the power supply system 1 according to the fifth modification will be described with reference to Fig. 9. Steps S30 to S32 in Fig. 9 are the same as steps S20 to S22 in Fig. 4, and therefore will not be described.

[0099] When the control unit 20 determines that the AC power supply 10 is not normal (S30: No), the first selection unit 17C selects the first storage battery 15 as the first supply source under the control of the control unit 20 (S33). Also, the second selection unit 18C selects the third selection unit 40 as the second supply source under the control of the control unit 20 (S34). Also, the third selection unit 40 selects the first selection unit 17C as the supply destination to which the power from the second storage battery 16 is supplied under the control of the control unit 20 (S35). As a result, the power from the second storage battery 16 can be supplied from the third selection unit 40 to the first selection unit 17C (receiver function unit 5), and is prohibited from being supplied from the third selection unit 40 to the second selection unit 18C (emergency broadcast function unit 6). This prohibition allows power from the second storage battery 16 to be supplied preferentially to the first selection unit 17C (receiver function unit 5) over the second selection unit 18C (emergency broadcast function unit 6).

[0100] In addition, in step S35, if the third selection unit 40 selects the first selection unit 17C, the second selection unit 18C may switch the second supply source from the third selection unit 40 to the second power supply unit 13, and supply power from the second power supply unit 13 to the emergency broadcast function unit 6.

[0101] Then, the control unit 20 judges whether the remaining amount of the first storage battery 15 is less than a predetermined remaining amount (for example, 1%) (whether the remaining amount is substantially gone) (S36). When the control unit 20 judges that the remaining amount of the first storage battery 15 is not less than the predetermined remaining amount (S36: No), the first selection unit 17C maintains the first supply source to the first storage battery 15 based on the control of the control unit 20 (S37). As a result, the first selection unit 17C maintains the supply of power from the first storage battery 15 to the receiver function unit 5. On the other hand, when the control unit 20 judges that the remaining amount of the first storage battery 15 is less than the predetermined remaining amount (S36: Yes), the first selection unit 17C switches the first supply source from the first storage battery 15 to the third selection unit 40 based on the control of the control unit 20 (S38). As a result, the first selection unit 17C supplies the power supplied from the third selection unit 40 (i.e., the power from the second storage battery 16) to the receiver function unit 5. As a result, even if the remaining charge of the first storage battery 15 falls below a predetermined remaining charge, the operation of the receiver function unit 5 can be continued by the power from the second storage battery 16. Then, the process returns to step S30.

[0102] In the above operation description, there is no case in which the third selection unit 40 selects the second selection unit 18C. However, when the AC power source 10 is normal, the second selection unit 18C may select the third selection unit 40, and the third selection unit 40 may select the second selection unit 18C, thereby supplying power from the second storage battery 16 to the emergency broadcast function unit 6.

[0103] (5.5.3) Effects The power supply system 1 according to the fifth modification includes a first selection unit 17C, a second selection unit 18C, and a third selection unit 40. The first selection unit 17C selects a first supply source for supplying power to the receiver function unit 5 from among the first power supply unit 12, the first storage battery 15, and the third selection unit 40. The second selection unit 18C selects a second supply source for supplying power to the emergency broadcast function unit 6 from among the second power supply unit 13 and the third selection unit 40. The third selection unit 40 selects a supply destination for supplying power from the second storage battery 16 from among the first selection unit 17C and the second selection unit 18C.

[0104] According to this configuration, the third selection unit 40 (i.e., from the second storage battery 16 side) can select the supply destination of the power from the second storage battery 16. This makes it possible to prevent the power from the second storage battery 16 from being supplied to the receiver function unit 5 and the emergency broadcast function unit 6 at the same time.

[0105] In the power supply system 1 according to the fifth modification, the third selection unit 40 selects the supply destination so that power from the second storage battery 16 is supplied preferentially to the receiver function unit 5 over the emergency broadcast function unit 6. With this configuration, the receiver function unit 5 can be operated with priority over the emergency broadcast function unit 6.

[0106] Furthermore, in the power supply system 1 according to the fifth modification, when the first selection unit 17C selects the first storage battery 15 as the first supply source, the third selection unit 40 selects the first selection unit 17C as the supply destination. According to this configuration, when power from the first storage battery 15 is supplied to the receiver function unit 5, power from the second storage battery 16 can be supplied only to the receiver function unit 5. This allows the receiver function unit 5 to be operated with priority over the emergency broadcast function unit 6.

[0107] (5.6) Variation 6 A power supply system 1 according to Modification 6 will be described with reference to Fig. 10 and Fig. 11. The power supply system 1 according to Modification 6 differs from the power supply system 1 according to Modification 5 in that the second storage battery 16 has a third storage battery 16A and a fourth storage battery 16B. Modification 6 will be described in detail below.

[0108] (5.6.1) Configuration Description As shown in Fig. 10, in the sixth modification, the second storage battery 16 includes a third storage battery 16A and a fourth storage battery 16B. The third storage battery 16A can selectively supply power to the first selection unit 17 (receiver function unit 5) and the second selection unit 18 (emergency broadcast function unit 6). The output unit of the third storage battery 16A is connected to a common terminal 40a of the third selection unit 40. This allows the power from the third storage battery 16A to be selectively supplied to the first selection unit 17 (receiver function unit 5) and the second selection unit 18 (emergency broadcast function unit 6) by the third selection unit 40.

[0109] The fourth storage battery 16B is a storage battery for supplying the minimum amount of power required to start up the emergency broadcast function unit 6. The output unit of the fourth storage battery 16B is connected to the second selection terminal 40c of the third selection unit 40. As a result, power from the fourth storage battery 16B is constantly supplied to the second selection terminal 18c of the second selection unit 18 via the third selection unit 40.

[0110] The third selection unit 40D of the sixth modification selectively outputs the power from the third storage battery 16A to the first selection unit 17 (receiver function unit 5) and the second selection unit 18 (emergency broadcast function unit 6). In addition, the third selection unit 40 constantly outputs the power from the fourth storage battery 16B to the second selection unit 18.

[0111] More specifically, the third selection unit 40D of the sixth modification further includes a second common terminal 40d in the third selection unit 40 of the fifth modification. That is, the third selection unit 40D of the sixth modification has a first common terminal 40a, a second common terminal 40d, a first selection terminal 40b, and a second selection terminal 40c. The first common terminal 40a is selectively connected to one of the first selection terminal 40b and the second selection terminal 40c. The first common terminal 40a is connected to the output part of the third storage battery 16A. The second common terminal 40d is selectively connected to one of the first selection terminal 40b and the second selection terminal 40c. In the sixth modification, the second common terminal 40d is always connected to the second selection terminal 40c. The second common terminal 40d is connected to the output part of the fourth storage battery 16B. The first selection terminal 40b is connected to the third selection terminal 17d of the first selection unit 17C. The second selection terminal 40c is connected to the second selection terminal 18c of the second selection unit 18C. The third selection unit 40D selectively connects the first common terminal 40a to either the first selection terminal 40b or the second selection terminal 40c, thereby selecting either the first selection unit 17C (receiver function unit 5) or the second selection unit 18C (emergency broadcast function unit 6) as a supply destination for supplying power from the third storage battery 16A. The third selection unit 40D also constantly connects the second common terminal 40d to the second selection terminal 40c, thereby constantly selecting the first selection unit 17C (receiver function unit 5) as a supply destination for supplying power from the fourth storage battery 16B. The third selection unit 40D is controlled by the control unit 20.

[0112] (5.6.2) Operation Description The operation of the power supply system 1 according to the sixth modification will be described with reference to Fig. 11. Steps S30 to S34 and S36 to S38 in Fig. 11 are the same as steps S30 to S34 and S36 to S38 in Fig. 9, and therefore the description thereof may be omitted.

[0113] When the control unit 20 judges that the AC power supply 10 is not normal (S30: No), the first selection unit 17C selects the first storage battery 15 as the first supply source under the control of the control unit 20 (S33). Also, the second selection unit 18C selects the third selection unit 40 as the second supply source under the control of the control unit 20 (S34). Also, the third selection unit 40 selects the first selection unit 17C as the supply destination to which the power from the third storage battery 16A is supplied, and always selects the second selection unit 18C as the supply destination to which the power from the fourth storage battery 16B is supplied (S35F) under the control of the control unit 20. As a result, the power from the third storage battery 16A can be supplied from the third selection unit 40 to the first selection unit 17C (receiver function unit 5), and is prohibited from being supplied from the third selection unit 40D to the second selection unit 18C (emergency broadcast function unit 6). This prohibition allows power from the third storage battery 16A to be supplied preferentially to the first selection unit 17C (receiver function unit 5) over the second selection unit 18C (emergency broadcast function unit 6). Also, power from the fourth storage battery 16B can be constantly supplied from the third selection unit 40D to the second selection unit 18C (emergency broadcast function unit 6). This ensures a minimum power supply for starting the emergency broadcast function unit 6. Then, the process proceeds to step S36. Then, the process from step S36 onwards is executed. The process from step S36 onwards is the same as the process from step S36 onwards in FIG. 9, so a description thereof will be omitted.

[0114] (5.6.3) Effects The power supply system 1 according to the sixth modification includes a first selection unit 17C, a second selection unit 18C, and a third selection unit 40D. The second storage battery 16 includes a third storage battery 16A and a fourth storage battery 16B. The first selection unit 17C selects a first supply source for supplying power to the receiver function unit 5 from among the first power supply unit 12, the first storage battery 15, and the third selection unit 40D. The second selection unit 18C selects a second supply source for supplying power to the emergency broadcast function unit 6 from among the second power supply unit 13 and the third selection unit 40D. The third selection unit 40D selects a supply destination for supplying power from the third storage battery 16A from among the first selection unit 17C and the second selection unit 18C, and always selects the second selection unit 18C as a supply destination for supplying power from the fourth storage battery 16B.

[0115] According to this configuration, the third selection unit 40D (i.e., from the third storage battery 16A side) can select the supply destination of the power from the third storage battery 16A. This can prevent the power from the third storage battery 16A from being simultaneously supplied to the receiver function unit 5 and the emergency broadcast function unit 6. Furthermore, the third selection unit 40D can always supply the power from the fourth storage battery 16B to the second selection unit 18C. This can ensure the minimum power supply required to start the emergency broadcast function unit 6 by the fourth storage battery 16B.

[0116] In the power supply system 1 according to the sixth modification, the third selection unit 40D selects the supply destination so that power from the third storage battery 16A is supplied preferentially to the receiver function unit 5 rather than to the emergency broadcast function unit 6. With this configuration, the receiver function unit 5 can be operated with priority over the emergency broadcast function unit 6.

[0117] In the power supply system 1 according to the sixth modification, when the first selection unit 17C selects the first storage battery 15 as the first supply source, the third selection unit 40D selects the first selection unit 17C as the power supply destination of the third storage battery 16A. According to this configuration, when power from the first storage battery 15 is supplied to the receiver function unit 5, power from the third storage battery 16A can be supplied only to the receiver function unit 5. This allows the receiver function unit 5 to be operated with priority over the emergency broadcast function unit 6.

[0118] (5.7) Variation 7 In the fifth modification, the third selection unit 40 selects the first selection unit 17C (S35 in FIG. 9) from the time when the first selection unit 17C selects the first storage battery 15 as the first supply source (S33 in FIG. 9). In contrast, in the seventh modification, as shown in FIG. 12, the third selection unit 40 selects the first selection unit 17C (S35C in FIG. 12) when the first selection unit 17C selects the first storage battery 15 as the first supply source and the remaining amount of the first storage battery 15 is less than a first predetermined remaining amount (for example, 60%) (i.e., the remaining amount has decreased to a certain extent) (S35B in FIG. 12). The configuration of the seventh modification is the same as the configuration of the fifth modification (FIG. 8). The details of the operation of the seventh modification will be described with reference to FIG. 12.

[0119] The operation of the power supply system 1 according to the seventh modification will be described with reference to Fig. 12. Steps S30 to S32 in Fig. 12 are the same as steps S30 to S32 in Fig. 9, and therefore will not be described.

[0120] When the control unit 20 determines that the AC power supply 10 is not normal (S30: No), the first selection unit 17C selects the first storage battery 15 as the first supply source under the control of the control unit 20 (S33). Also, the second selection unit 18C selects the third selection unit 40 as the second supply source under the control of the control unit 20 (S34). Also, the third selection unit 40 selects the second selection unit 18C as the supply destination to which the power from the second storage battery 16 is supplied under the control of the control unit 20 (S35A). As a result, the power from the second storage battery 16 is supplied from the third selection unit 40 to the second selection unit 18C (emergency broadcast function unit 6).

[0121] Then, the control unit 20 judges whether the remaining amount of the first storage battery 15 is less than a first predetermined remaining amount (for example, 60%) (i.e., whether the remaining amount has decreased to a certain extent) (S35B). If the control unit 20 judges that the remaining amount of the first storage battery 15 is not less than the first predetermined remaining amount (S35B: No), the process returns to step S33. On the other hand, if the control unit 20 judges that the remaining amount of the first storage battery 15 is less than the first predetermined remaining amount (S35B: Yes), the third selection unit 40 selects the first selection unit 17C as a supply destination to which the power from the second storage battery 16 is supplied (S35C). As a result, the power from the second storage battery 16 can be supplied from the third selection unit 40 to the first selection unit 17C (receiver function unit 5), and is prohibited from being supplied from the third selection unit 40 to the second selection unit 18C (emergency broadcast function unit 6). This prohibition allows power from the second storage battery 16 to be supplied preferentially to the first selection unit 17C (receiver function unit 5) over the second selection unit 18C (emergency broadcast function unit 6).

[0122] Then, the control unit 20 judges whether the remaining amount of the first storage battery 15 is less than a second predetermined remaining amount (for example, 1%) that is lower than the first predetermined remaining amount (i.e., whether the remaining amount is substantially empty) (S36). If the control unit 20 judges that the remaining amount of the first storage battery 15 is not less than the second predetermined remaining amount (S36: No), the first selection unit 17C maintains the first supply source to the first storage battery 15 based on the control of the control unit 20 (S37). As a result, the first selection unit 17C maintains the supply of power from the first storage battery 15 to the receiver function unit 5. On the other hand, if the control unit 20 judges that the remaining amount of the first storage battery 15 is less than the second predetermined remaining amount (S36: Yes), the first selection unit 17C switches the first supply source from the first storage battery 15 to the third selection unit 40 based on the control of the control unit 20 (S38). As a result, the first selection unit 17C supplies the power supplied from the third selection unit 40 (i.e., the power from the second storage battery 16) to the receiver function unit 5. As a result, even if the remaining charge of the first storage battery 15 falls below a second predetermined remaining charge (e.g., 0%), the operation of the receiver function unit 5 can be continued by the power from the second storage battery 16. Then, the process returns to step S30.

[0123] The effect of the seventh modification will be described. In the power supply system 1 according to the seventh modification, when the first selection unit 17C selects the first storage battery 15 as the first supply source and the remaining charge of the first storage battery 15 falls below a first predetermined remaining charge (predetermined remaining charge), the third selection unit 40 selects the first selection unit 17C as the supply destination. With this configuration, power from the second storage battery 16 can be supplied to the emergency broadcast function unit 6 until the remaining charge of the first storage battery 15 falls below the first predetermined remaining charge (less than predetermined). As a result, power from the second storage battery 16 can be supplied to the emergency broadcast function unit 6 to a certain extent while being supplied preferentially to the receiver function unit 5 over the emergency broadcast function unit 6.

[0124] Although the seventh modification has been described as being applied to the fifth modification, it may also be applied to the sixth modification.

[0125] (5.8) Variation 8 13 and 14, the power supply system 1 according to the eighth modification further includes a housing 51 in the power supply system 1 according to the first embodiment. The housing 51 houses a power supply unit 50, a receiver function unit 5, an emergency broadcast function unit 6, and an emergency phone function unit 93, which will be described later, of the power supply system 1. The power supply system 1 according to the eighth modification will be described in detail below.

[0126] (5.8.1) Configuration Description The power supply system 1 according to the eighth modification includes a power supply unit 50 (see FIG. 1) and a housing 51 (see FIG. 13).

[0127] The power supply unit 50 is the part of the power supply system 1 other than the housing 51 (the power supply connection unit 11, the first power supply unit 12, the second power supply unit 13, the first storage battery 15, the second storage battery 16, the first selection unit 17, the second selection unit 18, the voltage measurement unit 19 and the control unit 20).

[0128] The housing 51 is also used as the housing of the emergency broadcast system 100. The housing 51 houses each component of the emergency broadcast system 100 (power supply unit 50, emergency broadcast microphone 3, receiver function unit 5, emergency broadcast function unit 6, multiple amplifiers 8, and emergency telephone device 9). The housing 51 is, for example, in the shape of a rectangular parallelepiped (for example, a vertically elongated rectangular parallelepiped) box.

[0129] The housing 51 includes a main body portion 52 and a cover portion 53 .

[0130] The main body 52 is in the shape of a rectangular parallelepiped box having an opening 52a (see FIG. 14) on the front side. The main body 52 is formed, for example, from metal. The opening 52a functions as an inlet for introducing each component of the emergency broadcast system 100 (the receiver function unit 5, the emergency broadcast function unit 6, the multiple amplifiers 8, and the power supply unit 50) into the inside of the main body 52. ​​The opening 52a is formed on the entire front side of the main body 52.

[0131] Main body 52 has an amplifier storage section 521, an emergency broadcast storage section 522, a receiver storage section 523, a power supply storage section 524, and an emergency telephone storage section 525 (see FIG. 14). Each storage section (amplifier storage section 521, emergency broadcast storage section 522, receiver storage section 523, power supply storage section 524, and emergency telephone storage section 525) is disposed inside opening 52a, and is arranged side by side in the longitudinal direction (up-down direction) of main body 52.

[0132] The amplifier storage section 521 is a storage section that stores a plurality of amplifiers 8. The plurality of amplifiers 8 are configured to be stored in individual cases dedicated to the amplifiers. The amplifier storage section 521 is disposed at the topmost location inside the main body section 52. That is, the amplifier storage section 521 is disposed above the emergency broadcast function section 6. The plurality of amplifiers 8 are stored, for example, lined up vertically in the amplifier storage section 521. The plurality of amplifiers 8 are stored in the amplifier storage section 521 through the opening section 52a of the main body section 52. When stored in the amplifier storage section 521, the plurality of amplifiers 8 are fixed to the inner peripheral surface of the amplifier storage section 521 (for example, the inner surface at the back side) by, for example, being screwed.

[0133] The emergency broadcast storage section 522 is a storage section that stores the emergency broadcast function section 6. The emergency broadcast storage section 522 is arranged, for example, below the amplifier storage section 521. The emergency broadcast function section 6 is stored in the emergency broadcast storage section 522 through the opening 52a of the main body section 52. More specifically, the emergency broadcast function section 6 is composed of, for example, a plurality of flat plate-shaped units 61. The emergency broadcast storage section 522 is composed of, for example, a plurality of shelves (for example, two shelves) arranged vertically. The plurality of units 61 are inserted into the plurality of shelves of the emergency broadcast storage section 522 through the opening 52a of the main body section 52. At that time, the plurality of units 61 are inserted along the long side of the main surface of the unit 61 with the short side of the main surface of the unit 61 facing up and down. Then, each unit 61 inserted into the shelf is, for example, screwed to the shelf. In this manner, the emergency broadcast function section 6 is stored in the emergency broadcast storage section 522.

[0134] The receiver storage section 523 is a storage section that stores the receiver function section 5. The receiver storage section 523 is arranged, for example, below the emergency broadcast storage section 522. The receiver function section 5 is stored in the receiver storage section 523 from the opening 52a of the main body section 52. More specifically, the receiver function section 5 is composed of, for example, a plurality of units 54. The receiver storage section 523 is composed, for example, of a shelf. The plurality of units 54 are inserted into the shelf of the receiver storage section 523 from the opening 52a of the main body section 52. At that time, the plurality of units 54 are inserted along the long side of the main surface of the units 54 with the short side of the main surface of the units 54 facing up and down. Then, the units 54 inserted into the shelf are screwed to the shelf, for example. In this way, the receiver function section 5 is stored in the receiver storage section 523.

[0135] The power supply storage section 524 is a storage section that stores the power supply unit 50. The power supply storage section 524 is disposed, for example, below the receiver storage section 523 inside the main body section 52. The power supply unit 50 is stored in the power supply storage section 524 through the opening 52a of the main body section 52. More specifically, the power supply unit 50 is composed of a plurality of (for example, two) rectangular parallelepiped units 501. The plurality of units 501, 502 are stored in the power supply storage section 524 in a vertically arranged arrangement. The plurality of units 501, 502 are fixed to the inner peripheral surface (for example, the inner surface at the back side) of the power supply storage section 524, for example, by being screwed, while being stored in the power supply storage section 524. In this manner, the power supply unit 50 is stored in the power supply storage section 524.

[0136] The emergency telephone storage section 525 is a storage section that stores the emergency telephone function section 93 of the emergency telephone device 9. The emergency telephone function section 93 is stored, for example, in one (e.g., unit 501) of the multiple units 501, 502 of the power supply section 50. That is, the emergency telephone device 9 is integrated with the power supply section 50 and made into a unit. For this reason, the emergency telephone storage section 525 is also used as the power supply storage section 524. When stored in the emergency telephone storage section 525, the emergency telephone function section 93 is fixed to the inner circumferential surface of the emergency telephone storage section 525 (e.g., the inner surface at the back side), for example, by being screwed.

[0137] The lid 53 is a member that manually opens and closes the opening 52a of the main body 52. ​​The lid 53 is, for example, in the shape of a rectangular plate. One side (for example, the left side) of the lid 53 is connected by a hinge to the edge of the one side of the opening 52a of the main body 52. ​​The lid 53 opens and closes the opening 52a of the main body 52 by rotating about the hinge. The telephone master unit 91 and microphone 3 of the emergency telephone device 9 are arranged on the outer main surface 53a of the lid 53 (see FIG. 13).

[0138] (5.8.2) Effects The power supply system 1 according to the eighth modification includes a housing 51. The receiver function unit 5 and the emergency broadcast function unit 6 are stored in the housing 51. Furthermore, the emergency telephone function unit 93 is also stored in the housing 51. According to this configuration, since the receiver function unit 5, the emergency broadcast function unit 6, and the emergency telephone function unit 93 are stored in the housing 51, the receiver function unit 5, the emergency broadcast function unit 6, and the emergency telephone function unit 93 can be arranged together in one location. This makes it easier to manage and maintain the power supply system 1.

[0139] (Embodiment 2) A power supply system 1 according to the second embodiment will be described with reference to Fig. 15 and Fig. 16. In the following description, the same components as those in the first embodiment will be denoted by the same reference numerals and description thereof will be omitted, and components different from the first embodiment will be described.

[0140] (1) Configuration Description As shown in FIG. 15, the power supply system 1 of embodiment 2 is configured in the same manner as the power supply system 1 of embodiment 1, except that the first storage battery 15 and the second storage battery 16 are changed to a single storage battery 70.

[0141] The storage battery 70 is a storage battery that can be repeatedly charged and discharged by being charged, and is, for example, an EDLC or a lithium ion battery. The storage battery 70 is a power source for backing up the power supplied from the first power supply unit 12 to the receiver function unit 5. The storage battery 70 is also a power source for backing up the power supplied from the second power supply unit 13 to the emergency broadcast function unit 6. In other words, the storage battery 70 is a power source that can supply power to the receiver function unit 5 and the emergency broadcast function unit 6 when the AC power supply 10 fails. The storage battery 70 is charged by the power output from the power supply connection unit 11.

[0142] The first selection unit 17D of the second embodiment is configured similarly to the first selection unit 17 of the first embodiment, and selects the first supply source that supplies power to the receiver function unit 5 from among the first power supply unit 12 and the storage battery 70. The first selection unit 17D has a common terminal 17a, a first selection terminal 17b, and a second selection terminal 17c. The common terminal 17a is connected to the power input unit of the receiver function unit 5. The common terminal 17a is selectively connected to either one of the first selection terminal 17b and the second selection terminal 17c. The first selection terminal 17b is connected to the output unit of the first power supply unit 12. The second selection terminal 17c is connected to the output unit of the first storage battery 15.

[0143] The second selection unit 18D of the second embodiment is configured similarly to the second selection unit 18 of the first embodiment, and selects the second supply source that supplies power to the emergency broadcast function unit 6 from among the second power supply unit 13 and the storage battery 70. The second selection unit 18D has a common terminal 18a, a first selection terminal 18b, and a second selection terminal 18c. The common terminal 18a is connected to the power input unit of the emergency broadcast function unit 6. The common terminal 18a is selectively connected to either one of the first selection terminal 18b and the second selection terminal 18c. The first selection terminal 18b is connected to the output unit of the second power supply unit 13. The second selection terminal 18c is connected to the output unit of the storage battery 70.

[0144] The first selection unit 17D and the second selection unit 18D select the first supply source and the second supply source so that power from the storage battery 70 is supplied preferentially to the receiver function unit 5 rather than to the emergency broadcast function unit 6. More specifically, when the first selection unit 17D selects the storage battery 70 as the first supply source, the second selection unit 18D does not select the storage battery 70 as the second supply source. That is, when the first selection unit 17D and the second selection unit 18D simultaneously select the storage battery 70, the first selection unit 17D preferentially selects the storage battery 70, and the second selection unit 18D does not select the storage battery 70. In this case, the second selection unit 18D maintains the selection of the second power supply unit 13 as the second supply source.

[0145] (2) Operation Description The operation of the power supply system 1 according to the first modification will be described with reference to Fig. 16. Steps S40 to S42 in Fig. 16 are the same as steps S20 to S22 in Fig. 4, and therefore will not be described.

[0146] When the control unit 20 determines that the AC power supply 10 is not normal (S40: No), the first selection unit 17D selects the storage battery 70 as the first supply source based on the control of the control unit 20 (S43). As a result, the first selection unit 17D supplies power from the storage battery 70 to the receiver function unit 5. In this case, since the first selection unit 17D has selected the storage battery 70 as the first supply source, the second selection unit 18D selects the second power supply unit 13 as the second supply source based on the control of the control unit 20 (S44). As a result, the second selection unit 18D supplies power from the second power supply unit 13 to the emergency broadcast function unit 6. In this case, the second selection unit 18D supplies power from the second power supply unit 13 to the emergency broadcast function unit 6, but since the AC power supply 10 is not normal, the power from the second power supply unit 13 is not stable.

[0147] In this way, when the first selection unit 17D selects the storage battery 70 as the first supply source (S43), the second selection unit 18D does not select the storage battery 70 as the second supply source, but selects the second power supply unit 13 (S44). As a result, power from the storage battery 70 is preferentially supplied to the first selection unit 17D (receiver function unit 5) over the second selection unit 18D (emergency broadcast function unit 6).

[0148] In the above operation description, there is no case where the second selection unit 18D selects the storage battery 70. However, when the AC power source 10 is normal, the second selection unit 18D may select the storage battery 70 and supply power from the second storage battery 16 to the emergency broadcast function unit 6.

[0149] (3) Effects The power supply system 1 according to the second embodiment includes a first selection unit 17D and a second selection unit 18D. The first selection unit 17D selects a first power supply source that supplies power to the receiver function unit 5 from among the first power supply unit 12 and the storage battery 70. The second selection unit 18D selects a second power supply source that supplies power to the emergency broadcast function unit 6 from among the second power supply unit 13 and the storage battery 70.

[0150] According to this configuration, in the event of a failure of the AC power supply 10, the power supply source for each of the receiver function unit 5 and the emergency broadcast function unit 6 can be secured by the storage battery 70. In addition, since the storage battery 70 is shared by both the receiver function unit 5 and the emergency broadcast function unit 6, it can contribute to the miniaturization of the power supply system 1.

[0151] In the power supply system 1 according to the second embodiment, the first selection unit 17D and the second selection unit 18D select the first supply source and the second supply source so that power from the storage battery 70 is supplied preferentially to the receiver function unit 5 over the emergency broadcast function unit 6. With this configuration, the receiver function unit 5 can be operated with priority over the emergency broadcast function unit 6.

[0152] Moreover, the power supply system 1 according to the second embodiment further includes a storage battery 70. According to this configuration, a power supply system 1 including the storage battery 70 can be provided.

[0153] (4) Variations Below, we will list some modified examples of the second embodiment. The modified examples explained below can be applied in appropriate combinations.

[0154] (4.1) Variation 1 A power supply system 1 according to a first modification of the second embodiment will be described with reference to FIGS.

[0155] The power supply system 1 according to the first modification has the same configuration as the power supply system 1 according to the second embodiment, except that the power supply system 1 according to the second embodiment further includes a third selection unit 60. The third selection unit 60 selects a supply destination to which the power from the storage battery 70 is to be supplied from among the first selection unit 17D and the second selection unit 18D.

[0156] (4.1.1) Configuration Description As shown in FIG. 17, the third selection unit 60 has a common terminal 60a, a first selection terminal 60b, and a second selection terminal 60c. The common terminal 60a is selectively connected to one of the first selection terminal 60b and the second selection terminal 60c. The common terminal 60a is connected to the output unit of the storage battery 70. The first selection terminal 60b is connected to the second selection terminal 17c of the first selection unit 17D. The second selection terminal 60c is connected to the second selection terminal 18c of the second selection unit 18D. The third selection unit 60 selectively connects the common terminal 60a to one of the first selection terminal 60b and the second selection terminal 60c, thereby selecting one of the first selection unit 17D (receiver function unit 5) and the second selection unit 18D (emergency broadcast function unit 6) as a supply destination to which power from the storage battery 70 is supplied. The third selection unit 60 is controlled by the control unit 20.

[0157] The first selection section 17D of the first modification example is configured in the same manner as the first selection section 17D of the second embodiment, except that the second selection terminal 17c is connected to the first selection terminal 60b of the third selection section 60.

[0158] The second selection section 18D of the first modification is configured in the same manner as the second selection section 18D of the second embodiment, except that the second selection terminal 18c is connected to the second selection terminal 60c of the third selection section 60.

[0159] The third selection unit 60 selects the supply destination so that the power from the storage battery 70 is supplied preferentially to the receiver function unit 5 rather than to the emergency broadcast function unit 6. More specifically, when the first selection unit 17D selects the first storage battery 15 as the first supply source, the third selection unit 60 selectively connects the common terminal 40a to the first selection terminal 40b. That is, the third selection unit 60 selects the first selection unit 17D as the supply destination. As a result, even if the second selection unit 18D selects the third selection unit 60 as the second supply source, the power from the storage battery 70 is not supplied to the second selection unit 18D (emergency broadcast function unit 6). Only when the first selection unit 17D selects the third selection unit 60 as the first supply source, the power from the storage battery 70 is supplied to the first selection unit 17D (receiver function unit 5).

[0160] (4.1.2) Operation Description The operation of the power supply system 1 according to the first modification will be described with reference to Fig. 18. Steps S50 to S52 in Fig. 18 are the same as steps S20 to S22 in Fig. 4, and therefore will not be described.

[0161] When the control unit 20 judges that the AC power supply 10 is not normal (S50: No), the first selection unit 17D selects the third selection unit 60 as the first supply source based on the control of the control unit 20 (S53). Also, the second selection unit 18D selects the third selection unit 60 as the second supply source based on the control of the control unit 20 (S54). Also, the third selection unit 60 selects the first selection unit 17D as the supply destination to which the power from the storage battery 70 is supplied based on the control of the control unit 20 (S55). As a result, the power from the storage battery 70 is supplied from the third selection unit 60 to the first selection unit 17D (receiver function unit 5) and is prohibited from being supplied from the third selection unit 60 to the second selection unit 18D (emergency broadcast function unit 6). Due to this prohibition, the power from the storage battery 70 is preferentially supplied to the first selection unit 17D (receiver function unit 5) over the second selection unit 18D (emergency broadcast function unit 6). Then, the process returns to step S50.

[0162] In the above operation description, there is no case in which the third selection unit 60 selects the second selection unit 18D. However, when the AC power source 10 is normal, the second selection unit 18D selects the third selection unit 60, and the third selection unit 60 selects the second selection unit 18D, thereby supplying power from the storage battery 70 to the emergency broadcast function unit 6.

[0163] (4.1.3) Effects The power supply system 1 according to the first modification includes a third selection unit 60. The third selection unit 60 selects a supply destination to which power from the storage battery 70 is to be supplied from among the first selection unit 17D and the second selection unit 18D. With this configuration, the third selection unit 60 can select a supply destination of power from the storage battery 70 from the storage battery 70 side. This can prevent power from the storage battery 70 from being supplied to the first selection unit 17D (receiver function unit 5) and the second selection unit 18D (emergency broadcast function unit 6) simultaneously.

[0164] In the power supply system 1 according to the first modification, the third selection unit 60 selects the supply destination so that power from the storage battery 70 is supplied preferentially to the receiver function unit 5 over the emergency broadcast function unit 6. With this configuration, the receiver function unit 5 can be operated with priority over the emergency broadcast function unit 6.

[0165] (4.2) Other Modifications The first and second embodiments and their modifications may be combined and implemented.

[0166] (5) Description As is apparent from the above-described embodiment and modified examples, the present specification discloses the following aspects.

[0167] The power supply system (1) according to the first aspect includes a power connection unit (11), a first power supply unit (12), and a second power supply unit (13). The power connection unit (11) is connected to an external power supply (10). The first power supply unit (12) supplies power output from the power connection unit (11) to a receiver function unit (5). The receiver function unit (5) receives a detection result from a sensor (2) that is arranged in a facility and detects an abnormality occurring in the facility. The second power supply unit (13) supplies power supplied from the power connection unit (11) to an emergency broadcast function unit (6). The emergency broadcast function unit (6) makes an emergency broadcast within the facility.

[0168] According to this configuration, the power supply connection section (11) can be shared between the receiver function section (5) and the emergency broadcast function section (6), thereby making it possible to achieve a compact size.

[0169] The power supply system (1) according to the second aspect includes a first selection unit (17; 17A; 17C; 17D) and a second selection unit (18; 18A; 18C; 18D). The first selection unit (17; 17A; 17C; 17D) selects a first supply source that supplies power to the receiver function unit (5) from among the first power supply unit (12) and the first storage battery (15). The second selection unit (18; 18A; 18C; 18D) selects a second supply source that supplies power to the emergency broadcast function unit (6) from among the second power supply unit (13) and the second storage battery (16).

[0170] According to this configuration, in the event of a failure of the external power supply (10), the power supply sources for the receiver function unit (5) and the emergency broadcast function unit (6) can be secured by the first storage battery (15) and the second storage battery (16), respectively. In addition, since the storage battery (first storage battery (15)) for the receiver function unit (5) and the storage battery (second storage battery (16)) for the emergency broadcast function unit (6) are separate, the minimum necessary power can be secured for each of the receiver function unit (5) and the emergency broadcast function unit (6).

[0171] In the power supply system (1) according to the third aspect, in the second aspect, the first selection unit (17A) selects the first power supply source from among the first power supply unit (12), the first storage battery (15), and the second storage battery (16). The first selection unit (17A) and the second selection unit (18A) select the first power supply source and the second power supply source such that power from the second storage battery (16) is preferentially supplied to the receiver function unit (5) over the emergency broadcast function unit (6).

[0172] According to this configuration, the receiver function unit (5) can be operated with priority over the emergency broadcast function unit (6).

[0173] In the power supply system (1) according to the fourth aspect, in the second aspect, when the second selection unit (18A) selects the second storage battery (16) as the second supply source, the first selection unit (17A) switches the first supply source to the second storage battery (16) and selects the second storage battery (16) simultaneously with the second selection unit (18A).

[0174] According to this configuration, when the first selection unit (17A) needs to select the second storage battery (16), the first selection unit (17A) can select the second storage battery (16) simultaneously with the second selection unit (18A). This makes it possible to maintain power supply to the receiver function unit (5) from the second storage battery (16) while maintaining power supply to the emergency broadcast function unit (6).

[0175] The power supply system (1) according to the fifth aspect includes a first selection unit (17C), a second selection unit (18C), and a third selection unit (40). The first selection unit (17C) selects a first supply source for supplying power to the receiver function unit (5) from among the first power supply unit (12), the first storage battery (15), and the third selection unit (40). The second selection unit (18C) selects a second supply source for supplying power to the emergency broadcast function unit (6) from among the second power supply unit (13) and the third selection unit (40). The third selection unit (40) selects a supply destination for supplying power from the second storage battery (16) from among the first selection unit (17C) and the second selection unit (18C).

[0176] According to this configuration, the third selection unit (40) (i.e., from the second storage battery (16) side) can select a supply destination of the power from the second storage battery (16). This makes it possible to prevent the power from the second storage battery (16) from being simultaneously supplied to the receiver function unit (5) and the emergency broadcast function unit (6).

[0177] In the power supply system (1) according to the sixth aspect, in the fifth aspect, the third selection unit (40) selects the supply destination so that power from the second storage battery (16) is supplied preferentially to the receiver function unit (5) over the emergency broadcast function unit (6).

[0178] According to this configuration, the receiver function unit (5) can be operated with priority over the emergency broadcast function unit (6).

[0179] In the power supply system (1) according to the seventh aspect, in the fifth or sixth aspect, when the first selection unit (17C) selects the first storage battery (15) as the first supply source, the third selection unit (40) selects the first selection unit (17C) as the supply destination.

[0180] According to this configuration, when power from the first storage battery (15) is supplied to the receiver function unit (5), power from the second storage battery (16) can be supplied only to the receiver function unit (5). This allows the receiver function unit (5) to be operated with priority over the emergency broadcast function unit (6).

[0181] In the power supply system (1) according to the eighth aspect, in the fifth or sixth aspect, when the first selection unit (17C) selects the first storage battery (15) as the first supply source and the remaining charge of the first storage battery (15) falls below a predetermined remaining charge, the third selection unit (40) selects the first selection unit (17C) as the supply destination.

[0182] According to this configuration, until the remaining charge of the first storage battery (15) falls below a predetermined remaining charge, power from the second storage battery (16) can be supplied to the emergency broadcast function unit (6). As a result, power from the second storage battery (16) can be supplied preferentially to the receiver function unit (5) over the emergency broadcast function unit (6), while also being supplied to a certain extent to the emergency broadcast function unit (6) from the second storage battery (16).

[0183] The power supply system (1) according to the ninth aspect is a second aspect and includes a first selection unit (17C), a second selection unit (18C), and a third selection unit (40D). The second storage battery (16) has a third storage battery (16A) and a fourth storage battery (16B). The first selection unit (17C) selects a first supply source that supplies power to the receiver function unit (5) from among the first power supply unit (12), the first storage battery (15), and the third selection unit (40D). The second selection unit (18C) selects a second supply source that supplies power to the emergency broadcast function unit (6) from among the second power supply unit (13) and the third selection unit (40D). The third selection unit (40D) selects a supply destination for supplying electric power from the third storage battery (16A) from among the first selection unit (17C) and the second selection unit (18C), and always selects the second selection unit (18C) as a supply destination for supplying electric power from the fourth storage battery (16B).

[0184] According to this configuration, the third selection unit (40D) (i.e., from the third storage battery (16A) side) can select a supply destination of power from the third storage battery (16A). This can prevent power from the third storage battery (16A) from being simultaneously supplied to the receiver function unit (5) and the emergency broadcast function unit (6). Furthermore, the third selection unit (40D) can constantly supply power from the fourth storage battery (16B) to the second selection unit (18C). This can ensure a minimum power supply from the fourth storage battery (16B) for starting the emergency broadcast function unit (6).

[0185] The power supply system (1) according to a tenth aspect is any one of the second to eighth aspects, further including a first storage battery (15) and a second storage battery (16).

[0186] According to this configuration, it is possible to provide a power supply system (1) including the first storage battery (15) and the second storage battery (16).

[0187] The power supply system (1) according to the eleventh aspect includes a first selection unit (17D) and a second selection unit (18D). The first selection unit (17D) selects a first power supply source that supplies power to the receiver function unit (5) from among the first power supply unit (12) and the storage battery (70). The second selection unit (18D) selects a second power supply source that supplies power to the emergency broadcast function unit (6) from among the second power supply unit (13) and the storage battery (70).

[0188] According to this configuration, in the event of a failure of the external power supply (10), the power supply source for each of the receiver function unit (5) and the emergency broadcast function unit (6) can be secured by the storage battery (70). In addition, since the storage battery (70) is shared by both the receiver function unit (5) and the emergency broadcast function unit (6), this contributes to the miniaturization of the power supply system (1).

[0189] In the power supply system (1) according to the twelfth aspect, in the eleventh aspect, the first selection unit (17D) and the second selection unit (18D) select the first power supply source and the second power supply source such that power from the storage battery (70) is supplied preferentially to the receiver function unit (5) over the emergency broadcast function unit (6).

[0190] According to this configuration, the receiver function unit (5) can be operated with priority over the emergency broadcast function unit (6).

[0191] The power supply system (1) according to a thirteenth aspect is the eleventh or twelfth aspect, and further includes a third selection unit (60). The third selection unit (60) selects a supply destination, to which power is to be supplied from the storage battery (70), from among the first selection unit (17D) and the second selection unit (18D).

[0192] According to this configuration, the third selection unit (60) can select a supply destination of the power from the storage battery (70) from the storage battery (70) side. This can prevent the power from the storage battery (70) from being simultaneously supplied to the first selection unit (17D) (receiver function unit (5)) and the second selection unit (18D) (emergency broadcast function unit (6)).

[0193] In the power supply system (1) of the fourteenth aspect, in the thirteenth aspect, the third selection unit (60) selects the supply destination so that the power from the storage battery (70) is supplied preferentially to the receiver function unit (5) over the emergency broadcast function unit (6).

[0194] According to this configuration, the receiver function unit (5) can be operated with priority over the emergency broadcast function unit (6).

[0195] The power supply system (1) according to a fifteenth aspect is the eleventh aspect, further including a storage battery (70).

[0196] According to this configuration, it is possible to provide a power supply system (1) including the storage battery (70).

[0197] A power supply system (1) according to a sixteenth aspect is any one of the first to fifteenth aspects, in which a first power supply unit (12) supplies power to an emergency telephone function unit (93) that communicates with telephone handsets (101, 102) installed within a facility.

[0198] According to this configuration, power can be supplied not only to the receiver function unit (5) and the emergency broadcast function unit (6) but also to the emergency telephone function unit (93).

[0199] The power supply system (1) according to a seventeenth aspect is any one of the first to fifteenth aspects and includes a housing (51). The receiver function unit (5) and the emergency broadcast function unit (6) are housed in the housing (51).

[0200] According to this configuration, the receiver function unit (5) and the emergency broadcast function unit (6) are housed in the housing (51), so that the receiver function unit (5) and the emergency broadcast function unit (6) can be arranged together in one place, which makes it easier to manage and maintain the power supply system (1).

[0201] The power supply system (1) according to an eighteenth aspect is the sixteenth aspect, and further includes a housing (51). The receiver function unit (5), the emergency broadcast function unit (6), and the emergency call function unit (93) are housed in the housing (51).

[0202] According to this configuration, the receiver function unit (5), the emergency broadcast function unit (6), and the emergency telephone function unit (93) are housed in the housing (51), so that the receiver function unit (5), the emergency broadcast function unit (6), and the emergency telephone function unit (93) can be arranged together in one place, which makes it easier to manage and maintain the power supply system (1).

[0203] An emergency broadcast system (100) according to a nineteenth aspect includes the power supply system (1) according to any one of the first to eighteenth aspects, a receiver function unit (5), and an emergency broadcast function unit (6).

[0204] According to this configuration, an emergency broadcast system (100) including the power supply system (1) can be provided. [Explanation of symbols]

[0205] 1. Power supply system 2 sensor 5 Receiver function section 6 Emergency broadcast function section 11 Power connection 12 1st power supply section 13 Second power supply section 15 First storage battery 16 Second storage battery 16A 3rd storage battery 16B 4th storage battery 17;17A;17C;17D First Selection 18;18A;18C;18D Second Selection 40 Third Selection Section 51 Case 60 Third Selection Section 70 Storage Battery 93 Emergency telephone function section 100 Emergency Broadcast System 101,102 Telephone handset

Claims

1. A power supply connection portion for connection to an external power supply; a first power supply unit that supplies power output from the power supply connection unit to a receiver function unit that is disposed within a facility and receives a detection result from a detector that detects an abnormality occurring within the facility; A second power supply unit that supplies power supplied from the power supply connection unit to an emergency broadcast function unit that broadcasts emergency information within the facility. Power supply system.

2. a first selection unit that selects a first supply source that supplies power to the receiver function unit from among the first power supply unit and a first storage battery; A second selection unit that selects a second supply source that supplies power to the emergency broadcast function unit from the second power supply unit and a second storage battery. The power supply system according to claim 1 .

3. The first selection unit selects the first supply source from among the first power supply unit, the first storage battery, and the second storage battery; The first selection unit and the second selection unit select the first supply source and the second supply source so that power from the second storage battery is supplied preferentially to the receiver function unit over the emergency broadcast function unit. The power supply system according to claim 2 .

4. When the second selection unit selects the second storage battery as the second supply source, the first selection unit switches the first supply source to the second storage battery and selects the second storage battery simultaneously with the second selection unit. The power supply system according to claim 2 .

5. A first selection unit, a second selection unit, and a third selection unit, the first selection unit selects a first supply source that supplies power to the receiver function unit from among the first power supply unit, the first storage battery, and the third selection unit; The second selection unit selects a second supply source that supplies power to the emergency broadcast function unit from among the second power supply unit and the third selection unit, The third selection unit selects a supply destination to which the power from the second storage battery is supplied from among the first selection unit and the second selection unit. The power supply system according to claim 2 .

6. The third selection unit selects the supply destination so that the power from the second storage battery is preferentially supplied to the receiver function unit over the emergency broadcast function unit. The power supply system according to claim 5 .

7. The third selection unit selects the first selection unit as the supply destination when the first selection unit selects the first storage battery as the first supply source.

7. The power supply system according to claim 5 or 6.

8. The third selection unit selects the first selection unit as the supply destination when the first selection unit selects the first storage battery as the first supply source and the remaining amount of the first storage battery becomes less than a predetermined remaining amount.

7. The power supply system according to claim 5 or 6.

9. A first selection unit, a second selection unit, and a third selection unit, The second storage battery includes a third storage battery and a fourth storage battery, the first selection unit selects a first supply source that supplies power to the receiver function unit from among the first power supply unit, the first storage battery, and the third selection unit; The second selection unit selects a second supply source that supplies power to the emergency broadcast function unit from among the second power supply unit and the third selection unit, The third selection unit selects a supply destination to which the power from the third storage battery is supplied from among the first selection unit and the second selection unit, and always selects the second selection unit as a supply destination to which the power from the fourth storage battery is supplied. The power supply system according to claim 2 .

10. The storage battery further includes the first storage battery and the second storage battery. The power supply system according to any one of claims 2 to 6.

11. a first selection unit that selects a first supply source that supplies power to the receiver function unit from among the first power supply unit and a storage battery; A second selection unit that selects a second supply source that supplies power to the emergency broadcast function unit from the second power supply unit and the storage battery. The power supply system according to claim 1 .

12. The first selection unit and the second selection unit select the first supply source and the second supply source so that power from the storage battery is supplied preferentially to the receiver function unit over the emergency broadcast function unit. The power supply system according to claim 11.

13. a third selection unit that selects a supply destination to which the power from the storage battery is to be supplied from the first selection unit and the second selection unit; 13. The power supply system according to claim 11 or 12.

14. The third selection unit selects the supply destination so that the power from the storage battery is preferentially supplied to the receiver function unit rather than the emergency broadcast function unit.

14. The power supply system according to claim 13.

15. The storage battery is further provided. The power supply system according to claim 11.

16. The first power supply unit supplies power to an emergency telephone function unit that communicates with a telephone handset installed in the facility. The power supply system according to any one of claims 1 to 6.

17. Further comprising a housing, The receiver function unit and the emergency broadcast function unit are stored in the housing. The power supply system according to any one of claims 1 to 6.

18. Further comprising a housing, The receiver function unit, the emergency broadcast function unit, and the emergency telephone function unit are housed in the housing.

17. The power supply system of claim 16.

19. The power supply system according to any one of claims 1 to 6, The receiver function unit; The emergency broadcast function unit is provided. Emergency broadcast system.

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