Fire receiver and relay apparatus

Abstract

To prevent erroneous recognition that a fire has occurred when a line is erroneously short-circuited by an operator during an operation to connect / disconnect a fire sensor or a transmitter to / from the line.SOLUTION: A fire sensor 10 transmits a fire signal by short-circuiting a line. When a fire signal is received from the line during performance of a work to connect / disconnect the fire sensor 10 to / from the line, a fire receiver 20 outputs abnormality information indicating that short-circuit abnormality occurs in the line.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a fire alarm receiver and a repeater. [Background technology]

[0002] 2. Description of the Related Art There is known a fire alarm system that allows an additional controlled device to be installed on a line connected to a fire receiver (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-196284 A Summary of the Invention [Problem to be solved by the invention]

[0004] When changing partitions in a property, it may be necessary to add a fire detector to the circuit connecting the fire receiver and the fire detector, or to relocate a fire detector connected to this circuit. However, if a fire detector transmits a fire signal to the fire receiver by shorting the circuit, if a worker accidentally shorts the circuit while adding or relocating the detector, a fire alarm may be issued from the fire receiver even when there is no fire. This may lead to a false recognition that a fire has occurred. To avoid such problems, fire alarms are sometimes turned off during work, but in that case, not only the line being worked on (security zone) but the entire building becomes unsecurity-enabled.

[0005] The present invention aims to prevent a fire from being mistakenly recognized as having occurred when a worker accidentally shorts out a line while connecting or disconnecting a fire detector or transmitter to or from the line. [Means for solving the problem]

[0006] One aspect of the present invention provides a fire receiver that is characterized by having an output unit that outputs abnormality information indicating that a short circuit abnormality has occurred in the line when a fire signal is received from the line while an operation is being performed to connect or disconnect a fire detector or transmitter that transmits a fire signal by shorting the line from the line. Effect of the Invention

[0007] According to the present invention, when a worker accidentally shorts out a line while connecting or disconnecting a fire detector or transmitter to or from the line, it is possible to prevent the mistaken recognition that a fire has occurred. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing an example of the configuration of a fire alarm system according to an embodiment; [Diagram 2] FIG. 2 is a diagram showing an example of the configuration of a fire receiver. [Diagram 3] 4 is a flowchart showing an example of the operation of the fire receiver. [Figure 4] FIG. 13 is a diagram showing an example of the configuration of a repeater according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (composition) FIG. 1 is a diagram showing an example of the configuration of a fire alarm system 1 according to an embodiment. The fire alarm system 1 detects a fire that has occurred in a building and notifies people in the building of the occurrence of the fire. The fire alarm system 1 includes a plurality of fire detectors 10 and a fire receiver 20. The fire alarm system 1 may include devices such as transmitters, indicator lights, and local sound equipment in addition to the devices shown in FIG. 1. In the example shown in FIG. 1, the plurality of fire detectors 10 are installed on the first to fourth floors of a building. The fire receiver 20 is installed in a management office of the building. The fire detectors 10 installed on the first to fourth floors are connected to the fire receiver 20 via lines L1 to L4, respectively. In the following description, when there is no need to particularly distinguish between the lines L1 to L4, they are collectively referred to as "line L."

[0010] The fire detector 10 detects a fire that has broken out in a building and transmits a fire signal by shorting the connected line L. The fire detector 10 is composed of a sensor that detects physical phenomena caused by a fire. Examples of objects that the sensor detects include smoke, heat, flames, and CO. The line L includes a positive wire and a negative wire. When a fire is detected, the fire detector 10 electrically connects the positive wire and the negative wire through a switching operation. This shorts the line L and transmits a fire signal.

[0011] Incidentally, in a building, partitions may be changed to increase the number of private rooms on a floor or to divide a room. When a partition is changed, construction work (hereinafter referred to as "construction work, etc.") for connecting or disconnecting the fire detector 10 from the line L, such as relocating, expanding, removing, or replacing the fire detector 10, may be required to match the changed partition. This construction work, such as relocation, is an example of the work of connecting or disconnecting the fire detector 10 to or from the line L according to the present invention. When construction work, such as relocation, is performed while the line L is energized, a worker may accidentally short-circuit the line L during the construction work. When the line L is short-circuited, a fire signal is transmitted to the fire receiver 20. However, this does not indicate that the fire detector 10 has detected a fire. Therefore, even if the line L that is the subject of the construction work is short-circuited while construction work, such as relocation, is being performed, the fire receiver 20 does not treat it as a fire occurring, but treats it as a work abnormality indicating that a short-circuit abnormality has occurred due to the work of the worker.

[0012] 2 is a diagram showing an example of the configuration of the fire receiver 20. When the fire receiver 20 receives a fire signal transmitted from the fire detector 10 in response to the detection of a fire, it outputs a fire alarm. On the other hand, when a short circuit abnormality occurs due to the work of a worker during construction such as relocation, the fire receiver 20 outputs abnormal work information. The fire receiver 20 includes a control unit 21, a storage unit 22, a receiving unit 23, an operation unit 24, a display unit 25, an audio unit 26, and a reporting unit 27. These units are connected via a bus.

[0013] The control unit 21 is composed of, for example, one or more processors such as CPUs, and controls each unit of the fire receiver 20. The storage unit 22 is composed of, for example, memories such as RAM and EEPROM, and stores programs for implementing the functions of the fire receiver 20 and various data. The receiving unit 23 detects a short circuit in the line L and receives a fire signal from the fire detector 10 connected to the line L. The operation unit 24 is composed of, for example, an operation button and a switch, and is used to operate the fire receiver 20. The display unit 25 is composed of, for example, an LED, a 7-segment display, and a liquid crystal display, and displays various information. The audio unit 26 is composed of, for example, a speaker, and outputs various sounds such as voice messages and alarm sounds. The report transfer unit 27 is composed of, for example, a report transfer contact, and outputs a report transfer signal to an emergency broadcasting system or the like in response to receiving a fire signal. When the report transfer signal is output, the emergency broadcasting system sounds to notify that a fire has occurred. The display unit 25, the audio unit 26, and the report transfer unit 27 are examples of output units according to the present invention. When a transfer signal is output to the local sound equipment in response to the reception of a fire signal, the transfer signal is output from the bell output terminal or the local sound repeater to the local sound equipment. When the transfer signal is output, the local sound equipment rings to notify the occurrence of a fire.

[0014] The control unit 21 functions as a switching unit 211, an alarm control unit 212, and a power supply control unit 213. These functions are realized by the control unit 21 executing a program stored in the storage unit 22, performing calculations, or controlling each unit of the fire receiver 20.

[0015] The switching unit 211 switches between the fire monitoring mode and the work mode by setting the operation mode of the fire receiver 20 for each line L. In the fire monitoring mode, when a fire signal is received due to a short circuit of the line L, a process of notifying the occurrence of a fire is performed. When construction such as relocation is performed, a user uses the operation unit 24 to specify the line L to be the target of the construction and performs an operation to instruct the transition to the work mode. The user may be a worker or a person other than the worker. In response to this operation, the switching unit 211 switches the operation mode of the fire receiver 20 from the fire monitoring mode to the work mode for each line L. While construction such as relocation is being performed, the fire receiver 20 operates in the work mode. In the work mode, the specified line L is excluded from the target of fire monitoring. Therefore, even if a fire signal is received due to a short circuit of the specified line L, it is not determined that a fire has occurred, and a process of notifying the occurrence of a fire is not performed. When construction such as relocation is completed, a user uses the operation unit 24 to perform an operation to instruct restoration. When this operation is performed, the switching unit 211 switches the operation mode of the fire receiver 20 from the work mode to the fire monitoring mode.

[0016] In the fire monitoring mode, when the line L is short-circuited and a fire signal is received from this line L, the alarm control unit 212 causes the display unit 25, the audio unit 26, the report transfer unit 27, etc. to output a fire alarm indicating that a fire has occurred. The fire alarm is an example of fire information according to the present invention. On the other hand, in the work mode, when the designated line L is short-circuited and a fire signal is received from this line L, the alarm control unit 212 causes the display unit 25, the audio unit 26, and the report transfer unit 27 to output work abnormality information indicating that a short-circuit abnormality has occurred due to the work of a worker, without outputting a fire alarm. This short-circuit abnormality is an abnormality indicating that the line L has been short-circuited even though the fire detector 10 has not detected a fire. The work abnormality information is information for calling attention to a short-circuit abnormality caused by the work of a worker during construction such as relocation. The work abnormality information is an example of abnormality information according to the present invention.

[0017] The power supply control unit 213 supplies power to the plurality of fire detectors 10 via the lines L1 to L4.

[0018] (operation) 3 is a flowchart showing an example of the operation of the fire receiver 20. This operation is started when the fire receiver 20 receives a fire signal from the line L.

[0019] In step S11, the receiving unit 23 detects a short circuit in the line L and thereby receives a fire signal from the line L. In step S12, the alarm control unit 212 determines whether the operation mode of the fire receiver 20 is the work mode.

[0020] If the operation mode of the fire receiver 20 is the fire monitoring mode, the determination in step S12 is NO, and the process proceeds to step S14. In step S14, the alarm control unit 212 outputs a fire alarm. For example, the alarm control unit 212 displays a fire alarm on the display unit 25, outputs a fire alarm sound from the audio unit 26, and outputs a report signal indicating the occurrence of a fire from the report transfer unit 27, etc. When the report signal is output, the emergency broadcast equipment and local audio equipment sound. These fire alarm outputs can inform people in the building that a fire has occurred.

[0021] On the other hand, for example, when construction work such as relocation of the fire detector 10 connected to the line L4 is performed on the fourth floor of a building, the user uses the operation unit 24 at the start of the construction work to specify the line L4 to be constructed and performs an operation to instruct a transition to the work mode. When this operation is performed, the switching unit 211 switches the operation mode of the fire receiver 20 from the fire monitoring mode to the work mode for the line L4. In this way, when the operation mode of the fire receiver 20 is switched to the work mode before the above-mentioned step S11, the determination in the above-mentioned step S12 becomes YES, and the process proceeds to step S13.

[0022] In step S13, the alarm control unit 212 judges whether or not a fire signal has been received from the line L designated as a construction target in step S11. For example, if a fire signal has been received from the line L1 that is not a construction target, the judgment in step S13 becomes NO, so the process proceeds to step S14, and a fire alarm is output as described above. On the other hand, if a fire signal has been received from the line L4 designated as a construction target, the judgment in step S13 becomes YES, so the process proceeds to step S15.

[0023] In step S15, the alarm control unit 212 outputs work abnormality information indicating that a short circuit abnormality has occurred due to the work of the worker. For example, the alarm control unit 212 displays the work abnormality information on the display unit 25. More specifically, the alarm control unit 212 lights or blinks a work abnormality light indicating a work abnormality in construction such as relocation, and displays an abnormality code or an abnormality item name indicating this work abnormality and the line number of the line L4 to be constructed on the display unit 25. These displays are different from the display of a fire alarm. In addition, the alarm control unit 212 outputs an abnormal sound or a voice message indicating this work abnormality from the audio unit 26. These abnormal sounds and voice messages are different from fire alarm sounds. Furthermore, the alarm control unit 212 may output a report signal indicating this work abnormality from the report unit 27, etc. This report signal is different from a report signal indicating the occurrence of a fire. By outputting these work abnormality information, it is possible to inform the user that a short circuit has occurred in the line L due to the work of the worker in construction such as relocation. In addition, since a fire alarm is not output in step S15, it is possible to prevent people in the building from mistakenly thinking that a fire has occurred, as a result of a fire alarm being displayed, a fire alarm sound being output, and the emergency broadcast equipment and local sound equipment being activated even though a fire has not occurred.

[0024] When the relocation or other construction work is completed, the user performs an operation to instruct restoration using the operation unit 24. When this operation is performed, the switching unit 211 switches the operation mode of the fire receiver 20 from the work mode to the fire monitoring mode. If a fire signal is received after switching to the fire monitoring mode, the determination in step S12 described above becomes NO, so the process proceeds to step S14 and a fire alarm is output.

[0025] According to the above-described embodiment, even if a fire signal is received from the line L that is the subject of construction work while construction work such as relocation is being performed, a fire alarm is not output, so that it is possible to prevent a fire from being erroneously recognized as having occurred if a worker accidentally shorts the line L during the construction work. Also, if a fire signal is received from a line L that is not the subject of construction work while construction work such as relocation is being performed, a fire alarm is output, so that fire monitoring can be continued for the line L that is not the subject of construction work.

[0026] In addition, if a fire signal is received from the line L being worked on while work such as relocation is being carried out, work abnormality information is output, and a display and warning is issued to indicate that a short circuit has occurred due to the work, so that the worker can know that a short circuit has occurred, and when the work is restored, the short circuit is left as it is, so that the work is not restored and a fire signal is not output at the same time. In addition, if a short circuit occurs in the work mode, it may be set so that restoration is not possible unless the short circuit is eliminated.

[0027] (Modification) The present invention is not limited to the above-described embodiment, and may be modified as follows. The following modifications may be used alone or in combination of two or more.

[0028] (Variation 1) In the above-described embodiment, the power supply control unit 213 may stop the power supply to the line L that is the subject of the work while the work such as relocation is being performed, and continue the power supply to the other lines L. In this modified example, each line L includes an independent positive line. Each positive line is provided with a relay. When the user specifies the line L4 that is the subject of the work and performs an operation to instruct the transition to the work mode, the power supply control unit 213 stops the power supply to the specified line L4 by turning off the relay of the positive line included in the specified line L4. This can improve the safety of the work such as relocation. On the other hand, for the lines L1 to L3 that are not the subject of the work, the power supply control unit 213 continues the power supply to the lines L1 to L3 by keeping the relays of the positive lines of those lines on. This can continue the fire monitoring of the other lines L1 to L3 while the work such as relocation is being performed on the line L4.

[0029] When the work such as relocation is completed and the user performs an operation to instruct restoration, the power supply control unit 213 resumes the power supply to the line L4 by turning on the relay of the positive wire included in the line L4 that is the subject of the work. When the power supply to the line L4 is resumed, the switching unit 211 switches the operation mode of the fire receiver 20 to the short circuit monitoring mode. The control unit 21 of the fire receiver 20 further functions as a short circuit monitoring unit by executing a program stored in the storage unit 22, performing calculations, or controlling each unit of the fire receiver 20.

[0030] In the short circuit monitoring mode, the short circuit monitoring unit performs a process of monitoring whether or not a short circuit abnormality has occurred in the line L4 due to the work of a worker during construction such as relocation. Specifically, when a fire signal is not received from the line L4 of the construction target within a predetermined time after the power supply is resumed, the short circuit monitoring unit determines that a short circuit abnormality has not occurred in the line L4 due to the work of a worker. On the other hand, when a fire signal is received from the line L4 of the construction target due to a short circuit within a predetermined time after the power supply is resumed, the short circuit monitoring unit determines that a short circuit abnormality has occurred in the line L4 due to the work of a worker. When it is determined that a short circuit abnormality has occurred, the alarm control unit 212 outputs work abnormality information in the same manner as in step S15 described above. When the process of monitoring the short circuit abnormality is completed, the switching unit 211 switches the operation mode of the fire receiver 20 from the short circuit monitoring mode to the fire monitoring mode. As a result, even if the power supply to the line L of the construction target is stopped during construction such as relocation, if a worker accidentally shorts the line L during the construction, it is possible to recognize that a short circuit abnormality has occurred in the line L.

[0031] (Variation 2) The above-mentioned fire alarm system 1 may be applied to a P-type system or an R-type system. However, the R-type system can be applied when it has a repeater 30 that repeats signals between the fire sensor 10 and the fire receiver 20 in addition to the fire sensor 10 and the fire receiver 20, and the system under the repeater 30 has the same configuration as the P-type system. For example, the fire sensors 10 installed on the first to fourth floors are connected to the repeater 30 via lines L1 to L4, respectively. The repeater 30 and the fire receiver 20 are connected via a signal line.

[0032] 4 is a diagram showing a configuration example of a repeater 30 according to a modified example. The repeater 30 includes a control unit 31, a storage unit 32, and a receiving unit 33 similar to the above-mentioned control unit 21, storage unit 22, and receiving unit 23, as well as a communication unit 34. The communication unit 34 transmits and receives signals to and from the fire receiver 20. The communication unit 34 is an example of an output unit according to the present invention. In addition, the repeater 30 functions as a switching unit 311, an alarm control unit 312, and a power supply control unit 313 similar to the above-mentioned switching unit 211, alarm control unit 212, and power supply control unit 213 by the control unit 31 executing a program stored in the storage unit 32 to perform calculations or control each unit of the repeater 30.

[0033] However, when the line L is short-circuited in the fire monitoring mode and a fire signal is received from the line L, the alarm control unit 312 transmits fire information indicating that a fire has occurred from the communication unit 34 to the fire receiver 20. When the fire information is received from the repeater 30, the fire receiver 20 outputs a fire alarm in the same manner as in step S14 described above. Also, when the designated line L is short-circuited in the work mode and a fire signal is received from the line L, the alarm control unit 312 transmits work abnormality information indicating that a short-circuit abnormality has occurred due to the work of the worker from the communication unit 34 to the fire receiver 20. When the work abnormality information is received from the repeater 30, the fire receiver 20 outputs the work abnormality information in the same manner as in step S15 described above. Even with this configuration, it is possible to prevent a fire from being erroneously recognized as having occurred when a worker erroneously short-circuits the line L during work such as relocation.

[0034] (Variation 3) In the above-mentioned embodiment, the configurations of the fire alarm system 1, the fire detector 10, and the fire receiver 20 are not limited to the above-mentioned examples, and may be configured to include one or more of the above-mentioned devices or parts, or may be configured to exclude some of the devices or parts. Furthermore, the operations of the fire alarm system 1, the fire detector 10, and the fire receiver 20 are not limited to the above-mentioned examples, and the order of their operation procedures may be changed or some operation procedures may be omitted, as long as there is no contradiction.

[0035] (Variation 4) Another embodiment of the present invention may provide a method having operational steps performed in at least one of the fire alarm system 1, the fire detector 10, and the fire receiver 20. Furthermore, yet another embodiment of the present invention may provide a program executed in the fire detector 10 or the fire receiver 20. This program may be provided by being stored in a computer-readable recording medium, or may be provided by downloading via the Internet or the like.

[0036] (Variation 5) In the above-described embodiment, a transmitter may be connected to the lines L1 to L4 in addition to or instead of the fire detector 10. When a user presses the transmitter in the event of a fire, the transmitter transmits a fire signal by shorting the connected line L. There are cases where work such as replacement of the transmitter is also performed. Even if the line L being worked on is shorted while this work is being performed, it is not treated as a fire occurring, but may be treated as a work abnormality indicating that a short circuit abnormality has occurred due to the work of a worker. [Explanation of symbols]

[0037] 1: fire alarm system, 10: fire detector, 20: fire receiver, 21: control unit, 22: memory unit, 23: receiving unit, 24: operation unit, 25: display unit, 26: audio unit, 27: reporting unit, 211: switching unit, 212: alarm control unit, 213: power supply control unit

Claims

1. an output section which outputs abnormality information indicating that a short circuit has occurred in the line when a fire signal is received from the line while a fire detector or transmitter which transmits a fire signal by shorting the line is being connected to the line or disconnected from the line; A fire receiver comprising:

2. a switching unit that switches an operation mode for a line designated by a user's operation from a fire monitoring mode to a work mode in response to the user's operation including designation of the line to be the target of the work, The output unit outputs the abnormality information when the fire signal is received from the designated line in the work mode, and outputs fire information indicating that a fire has occurred when the fire signal is received from the designated line in the fire monitoring mode.

2. The fire receiver according to claim 1 .

3. The output unit outputs fire information indicating that a fire has occurred when the fire signal is received from a line other than the line that is the target of the work, among a plurality of lines to which a plurality of fire detectors or a plurality of transmitters are connected, each of which transmits a fire signal by shorting each line.

2. The fire receiver according to claim 1 .

4. The power supply control unit further includes a power supply control unit that stops the power supply to the line that is the target of the work while the work is being performed and continues the power supply to the other lines.

4. The fire receiver according to claim 3.

5. When the work is completed, the power supply control unit resumes the power supply to the line that is the target of the work; The power supply control unit further includes a short circuit monitoring unit that performs a process of monitoring the short circuit abnormality of the line depending on whether or not the fire signal is received from the line when the power supply to the line is resumed.

5. The fire receiver according to claim 4.

6. an output section which outputs abnormality information indicating that a short circuit has occurred in the line when a fire signal is received from the line while a fire detector or transmitter which transmits a fire signal by shorting the line is being connected to the line or disconnected from the line; A repeater comprising:

Images