Relay

Abstract

To solve such a problem that cost is appropriately required for being renewed to a fire-sensing system in which an address is set to a fire sensor, though the fire-sensing system in which the address is set to the fire sensor is highly functional, and it is advantageous to be replaced from a P-type fire-sensing system.SOLUTION: According to a relay according to the present invention, the relay for connecting a P-type fire-sensing receiver with an address fire sensor to which an address is individually applied comprises: a sensor transmission part for performing signal-transmitting with the address fire sensor in between, that is connectable to a fire sensor via a signal line; a sensor specification part for specifying the address fire sensor by which fire is sensed; and a switch part for notifying the P-type fire-sensing receiver of fire-sensing by short-circuiting a sense line during the fire-sensing, that is connectable to the sense line connected to the P-type fire-sensing receiver.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a repeater that relays signals between a fire detector and a fire receiver. [Background technology]

[0002] In a P-type fire detection system, multiple fire detectors are connected to a detection line consisting of two detection wires with terminating resistors at the ends. When a fire detector detects a fire, it shorts the detection line, activating the fire receiver. Therefore, in a normal P-type fire detection system, the fire receiver can determine which fire detector connected to which detection line detected the fire. However, the fire receiver cannot determine which of the multiple fire detectors connected to the detection line detected the fire.

[0003] Meanwhile, advanced P-type fire detection systems in which addresses are set for fire detectors have been developed. In such fire detection systems, the fire receiver can determine which fire detector has detected a fire. Patent Document 1 is an example of an advanced P-type fire detection system. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2010-250857 A Summary of the Invention [Problem to be solved by the invention]

[0005] In a normal P-type fire detection system, the fire detectors do not have addresses set, but an advanced fire detection system in which the fire detectors have addresses can obtain more information. Some advanced P-type fire detection systems are also equipped with an automatic test function. In a normal P-type fire detection system, an inspector must go around each room with a smoke or heating device attached to the end of a pole, and apply smoke or heat to each fire detector to test whether the fire receiver will sound. However, if an automatic test function is provided, the inspector can perform the test without having to go around each room where the fire detectors are installed.

[0006] Thus, a fire detection system with addresses set in the fire detectors is highly functional, and there are benefits to replacing a P-type fire detection system. However, updating to a fire detection system with addresses set in the fire detectors will incur a certain amount of cost. [Means for solving the problem]

[0007] The repeater in one embodiment of the present invention is a repeater that connects a P-type fire receiver and an address fire sensor that is individually assigned an address, and is characterized in that it is connectable to the fire sensor via a signal line and comprises a sensor transmission unit that transmits signals between the address fire sensor, a sensor identification unit that identifies the address fire sensor that has detected a fire, and a switch unit that is connectable to a sensing line connected to the P-type fire receiver and that shorts out the sensing line when a fire is detected, thereby reporting the detection of a fire to the P-type fire receiver. Effect of the Invention

[0008] When a P-type fire detection system is renewed, the repeater of the present invention can replace the P-type fire detector with an addressed fire detector and relay between the P-type fire receiver and the conventional P-type fire receiver. This allows the owner of a building or the like to use the conventional P-type fire receiver while replacing the fire detector when renewing the fire detection system. Then, after several years, the conventional P-type fire receiver can be replaced with a new fire receiver, completely renewing the fire detection system. Therefore, the owner of a building or the like can renew the fire detection system in stages without bearing the cost all at once. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 shows an example of a P-type fire detection system. [Diagram 2] A diagram showing an example of an advanced P-type fire detection system. [Diagram 3] FIG. 1 shows a fire detection system using the repeater of Example 1 during renewal. [Figure 4] 3 shows a circuit configuration of a switch unit in the first embodiment. [Diagram 5] FIG. 4 is a diagram showing a terminal block of the repeater in the first embodiment. [Figure 6] FIG. 4 is a diagram showing signals in the repeater of the first embodiment. [Figure 7] FIG. 13 shows a fire detection system using the repeater of Example 2 during renewal. [Figure 8] FIG. 11 is a diagram showing a terminal block of a repeater in a second embodiment. [Figure 9] FIG. 13 shows a fire detection system using the repeater of Example 3 during renewal. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] FIG. 1 shows a P-type fire detection system 5 as an example of a P-type fire detection system before renewal. The P-type fire detection system 5 includes a P-type fire receiver 51 and multiple P-type fire detectors 52. The P-type fire receiver 51 is connected to multiple detection lines, specifically, three detection lines. Each detection line includes two detection lines 53 and a termination resistor 54 that connects the two detection lines 53. Then, multiple P-type fire detectors 52 are connected between the two detection lines 53 of each detection line by a transmission wiring. The P-type fire receiver 51 also includes a control unit 511 and a display unit 512, as well as multiple report transfer switches 513, each of which is connected to a report transfer line 55. The control unit 511 controls the P-type fire receiver 51, such as determining a fire and transferring a report. The report transfer line 55 is connected to a reporting device for a security company, a door opening device, a duct opening device, and the like.

[0011] In the P-type fire detection system 5, a voltage is applied between the two sensing lines 53 of each sensing line during fire monitoring. When no fire is detected, all P-type fire detectors 52 open the two sensing lines 53, and a potential difference occurs due to the current flowing through the terminating resistor 54. When a fire occurs and any of the P-type fire detectors 52 detects a fire due to smoke or the like, the P-type fire detector 52 that detects the fire shorts the two sensing lines 53. The P-type fire receiver 51 receives the detection of a fire by the voltage drop between the two sensing lines 53. The P-type fire detection system 5 shown in FIG. 1 has three sensing lines, and can determine the occurrence of a fire for each sensing line. When the control unit 511 determines that a fire has occurred, the P-type fire receiver 51 sounds a fire alarm and displays a display corresponding to the sensing line that detected the fire on the display unit 512, and transfers the report via the report transfer line 55. By shorting or opening the reporting line 55 using the reporting switch 513 in the P-type fire receiver 51, it is possible to notify a security company, open automatic doors, open ducts, etc.

[0012] When conducting a fire detection test with the P-type fire detection system 5, the P-type fire receiver 51 is set so that it does not activate the alarm. Then, an inspector goes around each room with a smoke generator or heating device attached to the end of a stick, and applies smoke or heat to each P-type fire detector 52 to cause the P-type fire receiver 51 to sound an alarm and perform the test.

[0013] Next, in FIG. 2, an advanced P-type fire detection system 1 is shown as an example of an advanced P-type fire detection system after the renewal is completely completed. The advanced P-type fire detection system 1 includes an advanced P-type fire receiver 11 and a plurality of address fire detectors 12. The address fire detectors 12 are individually assigned addresses. The advanced P-type fire receiver 11 is connected to a plurality of signal lines, and is connected to three signal lines like the detection lines in FIG. 1. Each signal line includes two signal lines 13 and a termination resistor 14 that connects the two signal lines 13. The signal line can transmit a digital signal. A plurality of address fire detectors 12 are connected between the two signal lines 13 of each signal line by a forwarding wiring. The advanced P-type fire receiver 11 also includes a plurality of report transfer switches 113, and each of the report transfer switches 113 is connected to a report transfer line 15. The report transfer lines 15 are connected to a reporting device to a security company, a door opening device, a duct opening device, and the like. The advanced P-type fire receiver 11 in FIG. 2 has more report destinations than the P-type fire receiver 51 in FIG.

[0014] In the advanced P-type fire detection system 1, voltage is also applied between the two signal lines 13 of each signal line during fire monitoring. When no fire is detected, all address fire detectors 12 open the two signal lines 13. When a fire occurs and any of the address fire detectors 12 detects the fire due to smoke or the like, the address fire detector 12 that detected the fire shorts the two signal lines 13. The advanced P-type fire receiver 11 receives the detection of the fire by the voltage between the two signal lines 13 dropping. The advanced P-type fire receiver 11 that receives the detection of the fire fluctuates the voltage of its signal line to transmit an address response command W. In response to the address response command W, the address fire detector 12 that is connected to the signal line fluctuates the voltage of the signal line and returns an address signal M indicating its own address. This allows the advanced P-type fire receiver 11 to identify the address fire detector 12 that detected the fire.

[0015] The advanced P-type fire detection system 1 shown in Fig. 2 has three signal lines, but because the address fire detectors 12 transmit address signals M indicating their own addresses, it is possible to determine the occurrence of a fire for each address fire detector 12. When the control unit 111 determines that a fire has occurred, the advanced P-type fire receiver 11 displays on the display unit 112 which address fire detector 12 has detected the fire. It also sounds a fire alarm and transfers the report via the report transfer line 15. When the report transfer switch 113 of the P-type fire receiver 11 shorts or opens the report transfer line 15, it is possible to notify a security company, open automatic doors, open ducts, etc.

[0016] In the advanced P-type fire detection system 1, the address fire detector 12 is used, and the address fire detector 12 that detected the fire can be specified, so that a more detailed judgment of the fire situation can be made. Then, it is possible to generate a report according to the judgment of the detailed fire situation. For example, it is possible to perform a report control such as opening only the duct close to the address fire detector 12 that detected the fire. The advanced P-type fire detection system 1 in FIG. 2 has more report switches 113 and report lines 15 than the P-type fire detection system 5.

[0017] Furthermore, the advanced P-type fire detection system 1 can perform automatic testing. The address fire detectors 12 perform automatic testing intermittently and store the test results. Then, when the advanced P-type fire receiver 11 varies the voltage of the signal line to transmit a test result reply command, each address fire detector 12 returns a test result signal including the stored test result and its own address. By performing such automatic testing, the advanced P-type fire detection system 1 does not require an inspector to carry out operations such as applying smoke or heating by going around each room with a smoke applying device or heating device attached to the end of a stick and applying smoke or heat to each P-type fire detector 52. EXAMPLES

[0018] As mentioned above, if the P-type fire detection system is renewed to the advanced P-type fire detection system at once, it will cost a certain amount of money. Therefore, in the embodiment, the renewal is performed in stages. When the renewal of the P-type fire detection system 5 shown in FIG. 1 is performed in two stages, in the first stage, the P-type fire detector 52 is replaced with the address fire detector 12 to which an address is individually assigned. Then, the detection line is disconnected, and the repeater 2 is connected between them. The situation after the first stage of the renewal is completed is shown in FIG. 3. The repeater 2 is installed near the P-type fire receiver 51. In this state, the fire detection system is operated for a while, and then, in the second stage, the P-type fire receiver 51 is replaced with the advanced P-type fire receiver 11 and the repeater 2 is removed, so that the system can be renewed to the advanced P-type fire detection system 1.

[0019] The repeater 2 shown in FIG. 3 includes a control unit 21, a display unit 22, a transmission / reception unit 23, a switch unit 24, and a report transfer switch 25. The display unit 22, the transmission / reception unit 23, the switch unit 24, and the report transfer switch 25 are connected to the control unit 21 by an internal line. The outside of the repeater 2 is connected to the address fire detector 12 by a signal line consisting of two sets of signal lines 13. Also, the outside of the repeater 2 is connected to the P-type fire receiver 51 by a sensing line consisting of two sets of sensing lines 53. In the fire detection system of the first embodiment shown in FIG. 3, a plurality of signal lines and sensing lines are provided. The repeater 2 can be connected to the address fire detector 12 via the signal line, and can be connected to the P-type fire receiver 51 via the sensing line. In the repeater 2, the signal line 13 is connected to the transmission / reception unit 23, and the sensing line 53 is connected to the switch unit 24. The transmission / reception unit 23 is a sensor transmission unit that can be connected to the address fire detector 12 via the signal line 13 and transmits signals between the address fire detector 12. The sensing line 53 and the signal line 13 may be the sensing line 53 before renewal that has been cut near the P-type fire receiver 51.

[0020] As shown in Fig. 3, the repeater 2 is provided with four each of the transmission / reception units 23 and the switch units 24, which is more than the signal lines and the sensing lines, so one each is left over. Since the repeater 2 is provided with a larger number of transmission / reception units 23 and switch units 24, as shown in Fig. 3, some of the multiple transmission / reception units 23 and switch units 24 may be operated as connections that are not in use.

[0021] 4 shows the circuit configuration of the switch unit 24 in the repeater 2. The fire detection switch 241 is normally open and closes when the control unit 21 determines that there is a fire. The disconnection switch 242 is normally closed and opens when the control unit 21 determines that there is a disconnection. Terminals 244 and 245 are connected to the detection line 53. Between the terminals 244 and 245, a circuit in which the disconnection switch 242 and the terminating resistor 243 are connected in series and the fire detection switch 241 are connected in parallel.

[0022] 5 shows terminal block 27 for the signal line and sensing line in repeater 2. Wires are inserted into the places indicated by circles to make electrical connections. S1 to S4 indicate that connection terminal 271 on the right side is for connecting to signal line 13. Also, P1 to P4 indicate that connection terminal 272 on the left side is for connecting to sensing line 53. Connection terminal 271 is connected to transmitting / receiving unit 23, and connection terminal 272 is connected to terminals 244, 245 of switch unit 24.

[0023] 3, when the signal lines and the sensing lines are connected, the signal line 13 is connected to the connection terminals 271 of S1 to S3, and the sensing line 53 is connected to the connection terminals 272 of P1 to P3. Furthermore, there is no line connecting the connection terminal 271 of S4 and the connection terminal 272 of P4.

[0024] 5, in the first embodiment, the connection terminals 271 and 272 corresponding to the terminal block 27 are arranged close to each other, and the association is also indicated by numbers such as S1 to S4 and P1 to P4. Therefore, it is easy to check the connection between the signal line 13 and the sensing line 53 when installing the repeater 2.

[0025] Figure 6 shows the voltage between the signal lines that are the pair of signal lines 13 and the voltage between the sensing lines that are the pair of sensing lines 53 when an address fire detector 12 detects a fire in a fire detection system using the repeater 2 in Figure 3. At time a, when all address fire detectors 12 connected to the same pair of signal lines 13 are not detecting a fire, all address fire detectors 12 have opened the pairs of signal lines 13. At this time, current flows through the signal lines 13 from the transmitter / receiver 23 of the repeater 2, and a voltage is generated between the pairs of signal lines 13 due to the termination resistor 14.

[0026] When the address fire detector 12 detects a fire, at time b, the address fire detector 12 shorts the pair of signal lines 13. As a result, the voltage between the pair of signal lines 13 drops to 0V from time b. The repeater 2 detects that the voltage between the pair of signal lines 13 is 0V for a predetermined period of time via the transmitter / receiver 23 and determines whether a fire has been detected. Then, at time c, the fire detection switch 241 of the switch unit 24 connected to the pair of sensing lines 53 corresponding to the pair of signal lines 13 whose voltage has dropped to 0V is shorted, and the voltage between the pair of sensing lines 53 becomes 0V.

[0027] As described above, when a fire is detected, switch unit 24 shorts the sensing line to notify P-type fire receiver 51 of the detection. When the voltage between the pair of sensing lines 53 becomes 0V, P-type fire receiver 51 enters an accumulation operation, and after a predetermined time it determines that there is a fire, outputs a fire alarm, and transfers the report. In Figure 6, at time e, report transfer switch 513 in P-type fire receiver 51 shorts report line 55, causing the voltage to drop and reporting to be performed.

[0028] On the other hand, the repeater 2 that has determined that a fire has been detected performs a storage recovery process to temporarily restore the short-circuit state of the signal line, thereby restoring the address fire detector 12. In the storage recovery process, when the repeater 2 accumulates data up to time c, it turns off the current between the signal lines 13 by the transmitter / receiver 23 from time d. The address fire detector 12 is restored as the current between the signal lines 13 is turned off. Therefore, when the repeater 2 flows current again at time d, the voltage between the signal lines 13 is restored and the voltage rises. After that, from time f, which is a predetermined time after time d, the repeater 2 changes the voltage of its signal line and transmits the report address reply command W, as shown in FIG. 6. In response to the report address reply command W, the address fire detector 12 connected to the signal line changes the voltage of the signal line and returns an address signal M indicating its own address from time g, as shown in FIG. 6. This allows the repeater 2 to identify the address fire detector 12 that has detected the fire. The control unit 21 of the repeater 2 functions as a detector identification unit that identifies the address fire detector 12 that detected the fire. The control unit 21 then sends a display signal to display the address fire detector 12 that detected the fire on the display unit 22. Specifically, location information corresponding to the address fire detector 12 that detected the fire is displayed. For example, the location information displayed on the display unit 22, which is a liquid crystal display, may be something like "Smoke detected in room 402 on the 4th floor." Note that the address of the address fire detector 12 that detected the fire may also be displayed.

[0029] Furthermore, the repeater 2 can control the open / close state of the report transfer switch 25 by determining that the address fire detector 12 that has detected a fire is a specific fire detector. This allows the output of the report transfer line 26 to be controlled when a fire is detected by a specific fire detector, and a report transfer different from that of the P-type fire receiver 51 to be performed.

[0030] The repeater 2 also monitors for breaks in the signal line 13. A voltage is applied to the signal line 13 by the transmitting / receiving unit 23, and a current flows through the terminating resistor 14. However, if the signal line 13 is broken, the current stops flowing. The control unit 21 monitors the current through the transmitting / receiving unit 23, and when the current stops flowing, it determines that the line is broken. Then, in response to the signal line 13 determined to be broken, it opens the break switch 242 in the switch unit 24 shown in FIG. 4. This stops current flowing between the sensing lines 53, creating a situation that is the same as if the sensing line had been broken as seen from the P-type fire receiver 51. In this way, the P-type fire receiver 51 can detect a break in the signal line 13.

[0031] In addition, the repeater 2 of the first embodiment can perform an automatic test. The address fire detector 12 has an automatic test function, and performs an automatic test intermittently and stores the test results. Then, when the control unit 21 of the repeater 2 changes the voltage of the signal line by the transmitting / receiving unit 23 to transmit a test result reply command, each address fire detector 12 replies with a test result signal including the stored test result and its own address. The control unit 21 also functions as an automatic test information acquisition unit. The repeater 2 displays the test result for each address fire detector 12 on the display unit 22. In this way, the repeater 2 receives test result information from the address fire detector 12 having the automatic test function via the signal line 13, and displays the test result on the display unit 22. By performing an automatic test using the repeater 2 and the address fire detector 12, it is not necessary for an inspector to go around each room with a smoke generating device or a heating device attached to the end of a rod and apply smoke or heat to each P-type fire detector 52.

[0032] In the repeater 2, it is not necessary to use all of the multiple transmitter / receiver units 23 and switch units 24. Therefore, it is possible to accommodate renewal in many buildings with one type of repeater 2. Then, when the renewal is completed, the repeater 2 can be removed and used for renewal of the fire detection system in another building. EXAMPLES

[0033] The address fire detectors 12, which are individually assigned addresses, consume more power than the P-type fire detectors 52. Therefore, the number of address fire detectors 12 connected to one signal line, which is one set of signal lines 13, may be reduced. Also, the number of address fire detectors 12 may be increased relative to the P-type fire detectors 52, and the number of signal lines may be increased. The repeater 3 of the second embodiment is adapted to accommodate such an increase in signal lines.

[0034] FIG. 7 shows a fire detection system using the repeater 3 of the second embodiment during renewal. The repeater 3 includes a control unit 31, a display unit 32, a transmission / reception unit 33, a switch unit 34, and a report transfer switch 35. The display unit 32, the transmission / reception unit 33, the switch unit 34, and the report transfer switch 35 are connected to the control unit 31 by an internal line. The outside of the repeater 3 is connected to the address fire detector 12 by a signal line consisting of two sets of signal lines 13. Also, the outside of the repeater 3 is connected to the P-type fire receiver 51 by a sensing line consisting of two sets of sensing lines 53. In the fire detection system of the second embodiment shown in FIG. 7, a plurality of signal lines and sensing lines are provided. The repeater 3 can be connected to the address fire detector 12 via a signal line, and can be connected to the P-type fire receiver 51 via a sensing line. In the repeater 3, the signal line 13 is connected to the transmission / reception unit 33, and the sensing line 53 is connected to the switch unit 34. The transmitting / receiving unit 33 is a sensor transmitting unit that can be connected to the address fire sensor 12 via the signal line 13 and transmits signals between the address fire sensor 12. The sensing line 53 and a part of the signal line 13 may be the sensing line 53 before renewal that has been cut near the P-type fire receiver 51.

[0035] In the repeater 3 of the second embodiment, the number of transmitting / receiving units 33 is greater than the number of switch units 34. In the repeater 3, each switch unit 34 corresponds to two transmitting / receiving units 33. Therefore, when any of the address fire detectors 12 connected to the two signal lines detects a fire, one of the multiple sensing lines connected to the P-type fire receiver 51 is short-circuited by the switch unit 34. The switch unit 34 has the same circuit configuration as the switch unit 24 of the first embodiment, and when the signal line 13 is disconnected, it creates the same situation as when the sensing line is disconnected as seen from the P-type fire receiver 51, as in the first embodiment.

[0036] As shown in Fig. 7, the repeater 3 is provided with four switch units 34 and eight transceiver units 33, which is more than the signal lines and sensing lines, resulting in a surplus of unconnected transceiver units 33 and switch units 34. The repeater 3 is provided with a larger number of transceiver units 33 and switch units 34, and as shown in Fig. 7, some of the multiple transceiver units 33 and switch units 34 may be operated as unused connections.

[0037] 8 shows the terminal block 37 for the signal line and the sensing line in the repeater 3. Wires are inserted into the places indicated by circles to make electrical connections. S11 to S42 indicate that the connection terminal 371 on the right side is for connecting to the signal line 13. Also, P1 to P4 indicate that the connection terminal 372 on the left side is for connecting to the sensing line 53. The connection terminal 371 is connected to the transmitting / receiving unit 33, and the connection terminal 372 is connected to the switch unit 34.

[0038] When the signal line and the sensing line are connected as in Fig. 8, the signal line 13 is connected to the connection terminals 371 of S11 to S32 in Fig. 8, and the sensing line 53 is connected to the connection terminals 372 of P1 to P3. And there is no line connecting the connection terminals 371 of S41 and S42 and the connection terminal 372 of P4.

[0039] In the second embodiment, as shown in Fig. 8, the connection terminals 371 and 372 corresponding to the terminal block 37 are arranged close to each other, and the association is also indicated by numbers such as S11 to S42 and P1 to P4. S11 and S12 correspond to P1, S21 and S22 correspond to P2, S31 and S32 correspond to P3, and S41 and S42 correspond to P4. This makes it easy to check the connection between the signal line 13 and the sensing line 53 when installing the repeater 3. The corresponding relationship between the transmitting / receiving unit 33 connected to the connection terminal 371 and the switch unit 34 connected to the connection terminal 372 is stored in the control unit 31.

[0040] The control unit 31 of the repeater 3 shorts the switch unit 34 corresponding to the transceiver unit 33 whose voltage has been reduced by the address fire detector 12, and sets the voltage between the pair of sensing lines 53 to 0V. When a fire is detected, the switch unit 34 shorts the sensing line and notifies the P-type fire receiver 51 of the detection of the fire. Similarly to the repeater 2 of the first embodiment, the control unit 31 of the repeater 3 also functions as a sensor identification unit that identifies the address fire detector 12 that detected the fire. Then, the control unit 31 sends a display signal and displays the address fire detector 12 that detected the fire on the display unit 32. Specifically, it displays location information corresponding to the address fire detector 12 that detected the fire.

[0041] Furthermore, the repeater 3 can control the open / close state of the report transfer switch 35 by determining that the address fire detector 12 that has detected a fire is a specific fire detector. This allows the output of the report transfer line 36 to be controlled when a fire is detected by a specific fire detector, and a report transfer different from that of the P-type fire receiver 51 to be performed.

[0042] Furthermore, the repeater 3 of the second embodiment can perform an automatic test in the same manner as the repeater 2 of the first embodiment. The repeater 3 receives test result information from the address fire detector 12 having an automatic test function via the signal line 13, and displays the test result on the display unit 32. By performing an automatic test using the repeater 3 and the address fire detector 12, it is not necessary for an inspector to go around each room with a smoke generating device or a heating device attached to the end of a rod and apply smoke or heat to each P-type fire detector 52.

[0043] In the repeater 3, it is not necessary to use all of the multiple transmitter / receiver units 33 and switch units 34. Therefore, it is possible to accommodate renewal in many buildings with one type of repeater 3. Then, when the renewal is completed, the repeater 3 can be removed and used for renewal of the fire detection system in another building.

[0044] As shown in Fig. 8, the terminal block 37 of the repeater 3 is arranged and displayed so that the correspondence between the signal lines and the sensing lines can be easily understood. However, since the correspondence between the transceiver unit 33 and the switch unit 34 is stored in the control unit 31, the correspondence can also be arbitrarily set by memory. For example, the first signal line from the top in Fig. 7 can be made to correspond to the third sensing line from the top. Also, the correspondence between the address fire detectors 12, which are individually assigned addresses, and the switch unit 34 can be stored in the control unit 31. In this way, different switch units 34 can be made to correspond to different address fire detectors 12 connected to the same signal line. Such an example is shown in Example 3. EXAMPLES

[0045] FIG. 9 shows a fire detection system using the repeater 4 of the third embodiment in the course of renewal. The repeater 4 includes a control unit 41, a display unit 42, a transmission / reception unit 43, a switch unit 44, and a report transfer switch 45. The display unit 42, the transmission / reception unit 43, the switch unit 44, and the report transfer switch 45 are connected to the control unit 41 by an internal line. The outside of the repeater 4 is connected to the address fire detector 12, which is individually assigned an address, by a signal line consisting of two sets of signal lines 13. Also, the outside of the repeater 4 is connected to the P-type fire receiver 51 by a sensing line consisting of two sets of sensing lines 53. In the fire detection system of the third embodiment shown in FIG. 9, a plurality of signal lines and sensing lines are provided. The repeater 4 can be connected to the address fire detector 12 via the signal line, and can be connected to the P-type fire receiver 51 via the sensing line. In the repeater 4, the signal line 13 is connected to the transmission / reception unit 43, and the sensing line 53 is connected to the switch unit 44.

[0046] When a fire is detected, the switch unit 44 shorts the detection line to notify the P-type fire receiver 51 of the detection. The switch unit 44 has the same circuit configuration as the switch unit 24 in the first embodiment, and when the signal line 13 is disconnected, it creates the same situation as seen from the P-type fire receiver 51 as if the detection line were disconnected, as in the first embodiment. The transmitter / receiver unit 43 is connectable to the address fire detector 12 via the signal line 13, and is a detector transmission unit that transmits signals between the address fire detector 12. The detection line 53 and some of the signal lines 13 may be the detection line 53 before renewal that has been cut near the P-type fire receiver 51.

[0047] The repeater 4 of the third embodiment also has a large number of transmitting / receiving units 43 and switch units 44, and some of the transmitting / receiving units 43 and switch units 44 are not used. In the repeater 4, the correspondence between the address fire detectors 12, which are individually assigned addresses, and the switch units 44 is stored in the control unit 41, and when the address fire detector 12 detects a fire, the switch unit 44 associated with the address is closed. For monitoring the disconnection of the signal line 13, the correspondence between the signal line 13 and the detection line 53 is stored in the control unit 41, and when the signal line 13 is disconnected, the switch unit 44 associated with the signal line 13 cuts off the current. In addition, in the repeater 4 of the third embodiment, by changing the settings, the correspondence between the transmitting / receiving units 43 and the switch units 44 can be stored in the control unit 41 and the switch units 44 can be closed for some or all of the address fire detectors 12 as in the second embodiment.

[0048] The control unit 41 of the repeater 4 also functions as a sensor identification unit that identifies the address fire sensor 12 that has detected the fire, similar to the repeater 2 of the first embodiment. The control unit 41 then sends a display signal to display the address fire sensor 12 that has detected the fire on the display unit 42. Specifically, it displays the location information corresponding to the address fire sensor 12 that has detected the fire. Furthermore, the repeater 4 can control the open / close status of the report transfer switch 45 by determining that the address fire sensor 12 that has detected the fire is a specific fire sensor. This allows the output of the report transfer line 46 to be controlled by the detection of a fire by a specific fire sensor, thereby transferring a report different from that of the P-type fire receiver 51.

[0049] Furthermore, the repeater 4 of the third embodiment can perform an automatic test in the same manner as the repeater 2 of the first embodiment. The repeater 4 receives test result information from the address fire detector 12 having an automatic test function via the signal line 13, and displays the test result on the display unit 42. By performing an automatic test using the repeater 3 and the address fire detector 12, it is not necessary for an inspector to go around each room with a smoke generating device or a heating device attached to the end of a rod and apply smoke or heat to each P-type fire detector 52.

[0050] The repeater 4 of the third embodiment is provided with a larger number of transmitting / receiving units 43 and switching units 44, and the correspondence between the address fire detectors 12 and the switching units 44 is stored in the control unit 31, making it highly versatile. Therefore, one type of repeater 4 can be used for renewal in many buildings. Then, when the renewal is completed, the repeater 4 can be removed and used for renewal of the fire detection system in another building.

[0051] In the repeater 4 of the third embodiment, the number of the transmission / reception units 43 and the switch units 44 is the same, but they do not have to be the same. Also, the control unit 41 of the repeater 4 can store both the correspondence between the address fire detectors 12 and the switch units 44 and the correspondence between the transmission / reception units 43 and the switch units 44, but may store only one of them.

[0052] In the repeaters 2 to 4 of the first to third embodiments, when the signal line 13 is broken, a broken state is created between the sensing lines 53, so that the P-type fire receiver 51 can determine the breakage. However, the breakage determination and notification may be performed by the repeater, without being transmitted to the P-type fire receiver 51. In this case, the breakage switch 242 shown in FIG. 4 may be omitted. In this case, the breakage determination function in the P-type fire receiver 51 may be deleted, and when the breakage determination function of the P-type fire receiver 51 is deleted, the termination resistor in the switch section of the repeater may not be required.

[0053] Although the examples of the present invention have been described in detail above, the specific configuration is not limited to these embodiments, and the present invention includes design changes within the scope of the present invention. The above-mentioned examples can be combined by utilizing each other's technologies as long as there are no particular contradictions or problems in the purpose and configuration. [Explanation of symbols]

[0054] 1 Advanced P-type fire detection system, 11 Advanced P-type fire receiver, 111 Control unit, 112 Display unit, 113 Reporting switch, 12 Address fire detector, 13 Signal line, 14 Termination resistor, 15 Reporting line, 2 repeater, 21 control section, 22 display section, 23 transmitting / receiving section, 24 switch section, 241 fire detection switch, 242 disconnection switch, 243 terminating resistor, 244 terminal, 245 terminal, 25 signal transfer switch, 26 signal transfer line, 27 terminal block, 271 connection terminal, 272 connection terminal, 3 repeater, 31 control section, 32 display section, 33 transmitting / receiving section, 34 switch section, 35 signal transfer switch, 36 signal transfer line, 37 terminal block, 371 connection terminal, 372 connection terminal, 4 repeater, 41 control section, 42 display section, 43 transmitting / receiving section, 44 switch section, 45 reporting switch, 46 reporting line, 5 P type fire detection system, 51 P type fire receiver, 511 control unit, 512 display unit, 513 report switch, 52 P type fire detector, 53 detection line, 54 termination resistor, 55 report line, W Report address reply command, M Address signal

Claims

1. A repeater that connects a P-type fire receiver and an address fire detector that is individually assigned an address, a detector transmission unit that is connectable to the address fire detector via a signal line and transmits signals between the address fire detector and the detector transmission unit; a detector identification unit that identifies an address fire detector that has detected a fire; a switch unit that can be connected to a detection line connected to a P-type fire receiver and that shorts the detection line when a fire is detected to notify the P-type fire receiver of the detection of the fire; A repeater comprising:

2. A display unit is provided, 2. The repeater according to claim 1, wherein the display unit displays an address of a fire detector that has detected a fire and that is identified by the detector identification unit.

3. An automatic test information acquisition unit is provided, Receive test result information from an address fire detector having an automatic test function via a signal line; 3. The repeater according to claim 2, wherein the display unit displays a test result.

4. A repeater as described in any one of claims 1 to 3, characterized in that it is capable of connecting multiple signal lines and multiple sensing lines, and short-circuits the sensing line corresponding to the signal line to which an address fire detector that detects a fire is connected.

5. A repeater as described in any one of claims 1 to 3, characterized in that it is capable of connecting a plurality of signal lines and a plurality of sensing lines, and short-circuits the sensing line corresponding to the address fire detector that detects a fire.

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