JP7075774B2

JP7075774B2 - Fire alarm system

Info

Publication number: JP7075774B2
Application number: JP2018026730A
Authority: JP
Inventors: 憲石田; 晃久青山; 崇山本; 佳大松田
Original assignee: Hochiki Corp
Current assignee: Hochiki Corp
Priority date: 2018-02-19
Filing date: 2018-02-19
Publication date: 2022-05-26
Anticipated expiration: 2038-02-19
Also published as: JP2019144719A

Description

本発明は、受信機からの伝送路に煙感知器を接続して火災を監視する火災報知設備に関する。 The present invention relates to a fire alarm system for monitoring a fire by connecting a smoke detector to a transmission line from a receiver.

従来、Ｒ型として知られた火災報知設備にあっては、受信機から引き出された伝送路に、伝送機能を備えた煙感知器等の端末装置を接続し、火災検出時には、例えば煙感知器からの火災割込みに基づき、検索コマンドを発行して発報した煙感知器のアドレスを特定し、火災発生アドレスを表示すると共に、特定した煙感知器から火災データを収集して監視するようにしている。 In the conventional fire alarm equipment known as the R type, a terminal device such as a smoke detector equipped with a transmission function is connected to the transmission line drawn from the receiver, and when a fire is detected, for example, a smoke detector is connected. Based on the fire interruption from, issue a search command to identify the address of the smoke detector that issued the report, display the fire occurrence address, and collect and monitor the fire data from the identified smoke detector. There is.

このように、火災を検出した煙感知器のアドレスが分かると、適切な避難誘導や消火活動が可能となり、特に規模の大きな設備の火災監視には不可欠な機能となっている。 In this way, knowing the address of the smoke detector that detected the fire enables appropriate evacuation guidance and fire extinguishing activities, which is an indispensable function for fire monitoring of large-scale equipment in particular.

このような火災報知設備にあっては、受信機及び煙感知器が正常に動作することを確認するため定期的に点検を行っている。火災報知設備の点検にあっては、試験治具を用いて煙感知器の検煙部に煙を入れて発報するかを確認する加煙試験を行っている。 Such fire alarm systems are regularly inspected to confirm that the receiver and smoke detector operate normally. In the inspection of the fire alarm system, a smoke test is conducted to confirm whether smoke is put into the smoke detection part of the smoke detector and the alarm is issued using a test jig.

煙感知器の加煙試験は、受信機に試験モードを設定し、受信機に試験員が一人つき、警戒区域に設置されている煙感知器に対し別の試験員が試験治具を使用して煙を入れる加煙試験を行うと、加煙試験により煙感知器が発報して火災信号を受信機に送信して発報が表示され、受信機側の試験員は加煙試験による受信機の正常動作を確認する。 For the smoke test of the smoke detector, the test mode is set for the receiver, one examiner is attached to the receiver, and another examiner uses the test jig for the smoke detector installed in the caution area. When a smoke test is performed, the smoke detector issues a smoke test and sends a fire signal to the receiver to display the signal, and the examiner on the receiver side receives the smoke test. Check the normal operation of the machine.

また、発報による火災信号を受信した受信機からは、発報した煙感知器に対し点灯指示信号が送信され、発報した煙感知器の発報表示灯が点灯され、発報表示灯の点灯により現場の試験員は煙感知器の発報により受信機が正常に動作したことを確認し、次の煙感知器の設置場所に移動して加煙試験を行う作業を繰り返す。 In addition, the receiver that received the fire signal due to the alarm sends a lighting instruction signal to the smoke detector that issued the alarm, and the alarm indicator lamp of the smoke detector that issued the alarm is turned on. When the lights are turned on, the on-site tester confirms that the receiver has operated normally by issuing a smoke detector, moves to the next smoke detector installation location, and repeats the work of performing the smoke test.

加煙試験により発報表示灯が点灯した煙感知器は、時間の経過に伴って煙が抜けて復旧すると受信機からの消灯指示信号を受けて発報表示灯が消灯される。 The smoke detector, in which the alarm indicator light is turned on by the smoke test, receives a turn-off instruction signal from the receiver and turns off the alarm indicator lamp when the smoke is removed and the smoke is restored with the passage of time.

特開２０１４－１７８９３６号公報Japanese Unexamined Patent Publication No. 2014-178936 特開２０１６－０７６０６４号公報Japanese Unexamined Patent Publication No. 2016-076064 特開２０１７－０６８５２３号公報Japanese Unexamined Patent Publication No. 2017-068523

ところで、煙感知器の加煙試験を連続して行っていくと、加煙試験により点灯した発報表示灯は、加煙試験による煙が煙感知器の検煙部から抜けて復旧するまで点灯しており、発報表示灯の点灯数に応じて受信機からの伝送路に流れる回線電流が増加し、受信機から引き出された伝送路には電流制限があり、この電流制限に対応して加煙試験により点灯する発報表示灯の数を所定数、例えば５灯に制限する制御を行っている。 By the way, when the smoke test of the smoke detector is continuously performed, the alarm indicator lamp lit by the smoke test is lit until the smoke from the smoke test escapes from the smoke detection part of the smoke detector and is restored. The line current flowing through the transmission line from the receiver increases according to the number of lighting of the alarm indicator, and the transmission line drawn from the receiver has a current limit. Control is performed to limit the number of alarm indicators that are lit by the smoke test to a predetermined number, for example, five.

このため試験員は発報表示灯の点灯数が５灯に達するまでは煙感知器の加煙試験を連続して行うことができるが、５灯が点灯した状態で加煙試験を行っても発報表示灯が点灯しないことから、発報表示灯が点灯している試験済みの煙感知器から煙が抜けて発報表示灯が消灯するまで待って次の加煙試験を行うこととなり、この待ち時間分が影響して全ての煙感知器の加煙試験を終了するまでの時間が長くなってしまう問題がある。 For this reason, the examiner can continuously perform the smoke test of the smoke detector until the number of lighting of the alarm indicator lights reaches 5, but even if the smoke test is performed with the 5 lights lit. Since the alarm indicator light does not light up, the next smoke test will be performed after waiting for the smoke to escape from the tested smoke detector with the alarm indicator lamp lit and the alarm indicator lamp to turn off. There is a problem that the time required to complete the smoke test of all smoke detectors becomes long due to the influence of this waiting time.

また、火災により煙感知器が発報した場合にも、伝送路の電流制限に対応して発報表示灯の点灯数を制限した場合には、煙感知器の発報数が発報表示灯の点灯制限数を超えると新たに発報した煙感知器の発報表示灯が点灯されないという問題がある。 In addition, even if the smoke detector issues a report due to a fire, if the number of lights of the alarm indicator lamp is limited in response to the current limitation of the transmission line, the number of alarms issued by the smoke detector will be the alarm indicator lamp. There is a problem that the alarm indicator lamp of the newly issued smoke detector is not lit when the lighting limit number of is exceeded.

本発明は、伝送路の電流制限に対応した発報表示灯の点灯数を維持するように、火災により発報した煙感知器から煙が抜けて復旧するのを待つことなく新たな煙感知器の発報による発報表示灯の点灯を可能とし、また、加煙試験で発報した煙感知器から煙が抜けて復旧するのを待つことなく次の煙感知器の加煙試験を可能として作業時間を短縮する火災報知設備を提供することを目的とする。 The present invention is a new smoke detector without waiting for smoke to escape from the smoke detector issued by the fire and recover so as to maintain the number of lighting of the alarm indicator lamp corresponding to the current limit of the transmission line. It is possible to turn on the alarm indicator lamp by issuing the alarm, and it is possible to perform the smoke test of the next smoke detector without waiting for the smoke to escape from the smoke detector issued in the smoke test and recover. The purpose is to provide fire alarm equipment that shortens the working time.

（火災報知設備）
本発明は、受信機に複数の煙感知器を接続して火災を監視する火災報知設備であって、
受信機は、監視時と保守点検時とで一部動作が異なる制御部を備え、
制御部は、
煙感知器の発報による火災信号を受信して表示し、
現在の点灯中の発報表示灯の数が所定の最大点灯数未満の場合は、発報した煙感知器に点灯指示信号を送信して発報表示灯を点灯させ、
現在の点灯中の発報表示灯の数が最大点灯数に達した場合、
監視時は、所定の煙感知器を除く発報表示灯の点灯が最も古い煙感知器に消灯指示信号を送信して消灯させると共に、発報した煙感知器に点灯指示信号を送信して発報表示灯を点灯させ、
保守点検時は、全ての煙感知器のうち発報表示灯の点灯が最も古い煙感知器に消灯指示信号を送信して消灯させると共に、発報した煙感知器に点灯指示信号を送信して発報表示灯を点灯させ、
発報した煙感知器から復旧信号を受信した場合は、当該煙感知器に消灯指示信号を送信して発報表示灯を消灯させることを特徴とする。
ここで、所定の煙感知器は、少なくとも第１報目の煙感知器である。
(Fire alarm system)
The present invention is a fire alarm system for monitoring a fire by connecting a plurality of smoke detectors to a receiver.
The receiver is equipped with a control unit whose operation is partially different between monitoring and maintenance.
The control unit
Receives and displays fire signals from smoke detectors
If the number of alarm indicators currently lit is less than the specified maximum number of lights, a lighting instruction signal is sent to the smoke detector that issued the alarm to turn on the alarm indicators .
When the number of currently lit alarm indicators reaches the maximum number of lights ,
During monitoring, the warning indicator lights other than the specified smoke detectors are turned off by sending a turn-off instruction signal to the oldest smoke detector , and also sending a lighting instruction signal to the smoke detector that issued the warning. Turn on the alarm light and
At the time of maintenance and inspection, the turn-off instruction signal is sent to the smoke detector with the oldest lighting of the alarm indicator light to turn it off, and the lighting instruction signal is sent to the smoke detector that issued the alarm. Turn on the alarm light and
When a recovery signal is received from the smoke detector that issued the alarm, a turn-off instruction signal is transmitted to the smoke detector to turn off the alarm indicator lamp.
Here, the predetermined smoke detector is at least the first smoke detector.

（発報表示灯の表示形態）
制御部は、保守点検時に、所定の煙感知器とそれ以外の煙感知器とで、発報表示灯の表示形態を異ならせる。
(Display form of alarm indicator light)
At the time of maintenance and inspection, the control unit makes the display form of the alarm indicator different between the predetermined smoke detector and the other smoke detectors.

（固定値として設定した最大点灯数）
制御部は、発報表示灯の最大点灯数を所定の固定値として設定する。
(Maximum number of lights set as a fixed value)
The control unit sets the maximum number of lighting of the alarm indicator lamp as a predetermined fixed value.

（回線電流から動的に設定する最大点灯数）
制御部は、受信機と複数の煙感知器を接続する伝送路に流れる回線電流を測定して所定の定格許容電流との差電流を求め、差電流を発報表示灯１台当りの点灯電流で除算して発報表示灯の点灯可能数を求め、点灯可能数を現在点灯中の発報表示灯の数に加算して最大点灯数を求めて設定する。
(Maximum number of lights dynamically set from the line current)
The control unit measures the line current flowing in the transmission line connecting the receiver and multiple smoke detectors, obtains the difference current from the predetermined allowable allowable current, and issues the difference current. Divide by with to obtain the number of lit warning indicators, and add the number of lit indicators to the number of currently lit alarm indicators to obtain and set the maximum number of lights.

（所定時間経過後の発報表示灯の消灯）
制御部は、保守点検時に、発報した煙感知器に点灯指示信号を送信してから復旧信号を受信することなく所定時間が経過した場合、煙感知器に消灯指示信号を送信して発報表示灯を消灯させる。
(Turn off the alarm indicator after the specified time has passed)
At the time of maintenance and inspection, if a predetermined time elapses without receiving the recovery signal after transmitting the lighting instruction signal to the smoke detector that issued the alarm, the control unit sends an extinguishing instruction signal to the smoke detector to issue an alarm. Turn off the indicator light.

（発報表示灯消灯中の煙感知器を受信機で表示）
受信機は、
発報中の煙感知器を特定する情報を表示する機能と、
火災信号を受信した煙感知器のうち復旧信号を受信していないものであって発報表示灯が消灯している煙感知器を特定する情報を表示する機能と、
を有する。
(The smoke detector with the alarm indicator off is displayed by the receiver)
The receiver is
A function to display information that identifies the smoke detector being issued, and
A function to display information that identifies the smoke detector that has received the fire signal but has not received the recovery signal and the alarm indicator is off .
Have.

（一斉消灯命令）
制御部は、保守点検時に、全ての煙感知器に発報表示灯を消灯させる一斉消灯指示信号を送信して発報表示灯を消灯させる。
(Simultaneous turn-off order)
At the time of maintenance and inspection , the control unit sends a simultaneous turn-off instruction signal to turn off the alarm indicator lights to all smoke detectors to turn off the alarm indicator lights.

（復旧無しで真火災と判断）
制御部は、保守点検時に、火災信号を受信した煙感知器のうち復旧信号を受信していないものであって発報表示灯が消灯している煙感知器のうち、火災信号を受信してから所定の時間が経過しても復旧信号を受信しない煙感知器について、真に火災が発生しているとみなし発報表示灯を点灯させる。
(Judged as a true fire without recovery)
At the time of maintenance and inspection, the control unit receives the fire signal from the smoke detectors that have received the fire signal but have not received the recovery signal and the alarm indicator light is off. For smoke detectors that do not receive a recovery signal even after a predetermined time has passed, it is considered that a true fire has occurred and the alarm indicator light is turned on.

（火災報知設備の基本的な効果）
本発明は、受信機に複数の煙感知器を接続して火災を監視する火災報知設備であって、受信機は、監視時と保守点検時とで一部動作が異なる制御部を備え、制御部は、煙感知器の発報による火災信号を受信して表示し、現在の点灯中の発報表示灯の数が所定の最大点灯数未満の場合は、発報した煙感知器に点灯指示信号を送信して発報表示灯を点灯させ、現在の点灯中の発報表示灯の数が最大点灯数に達した場合、監視時は、所定の煙感知器を除く発報表示灯の点灯が最も古い煙感知器に消灯指示信号を送信して消灯させると共に、発報した煙感知器に点灯指示信号を送信して発報表示灯を点灯させ、保守点検時は、全ての煙感知器のうち発報表示灯の点灯が最も古い煙感知器に消灯指示信号を送信して消灯させると共に、発報した煙感知器に点灯指示信号を送信して発報表示灯を点灯させ、発報した煙感知器から復旧信号を受信した場合は、当該煙感知器に消灯指示信号を送信して発報表示灯を消灯させるため、火災発報により煙感知器の点灯中の発報表示灯の数が最大点灯数、例えば５灯に達した場合、所定の煙感知器つまり第１報目と第２報目の煙感知器を除いた中で最も古く点灯した第３報目の発報表示灯が消灯され、次に発報する煙感知器の発報表示灯の点灯が可能となり、伝送路の電流制限に対応して火災発報により点灯する発報表示灯の数を所定数、例えば５灯に制限しながら、新たに発報した煙感知器の発報表示灯を点灯させることができる。
(Basic effect of fire alarm system )
The present invention is a fire notification device for monitoring a fire by connecting a plurality of smoke detectors to the receiver, and the receiver is provided with a control unit whose operation is partially different between monitoring and maintenance and inspection, and is controlled. The unit receives and displays the fire signal from the smoke detector, and if the number of currently lit alarm indicators is less than the specified maximum number of lights , the smoke detector is instructed to light. When a signal is sent to turn on the alarm indicator and the number of currently lit alert indicators reaches the maximum number of lights, the alarm indicators except for the specified smoke detector are lit during monitoring . Sends a light-off instruction signal to the oldest smoke detector to turn it off, and also sends a lighting instruction signal to the issued smoke detector to turn on the alarm indicator light . Of the devices, the smoke detector with the oldest lighting indicator is sent a light-off instruction signal to turn it off, and the smoke detector that issued the alarm is sent a lighting instruction signal to turn on the warning indicator light. When a recovery signal is received from the reported smoke detector , a turn-off instruction signal is sent to the smoke detector to turn off the alarm indicator, so that the smoke detector is lit due to a fire alarm. When the number of lights reaches the maximum number of lights, for example, 5 lights, the oldest lit third report is issued except for the specified smoke detectors, that is, the first and second smoke detectors. The indicator light is turned off, the alarm indicator lamp of the smoke detector that issues the next alarm can be turned on, and the number of alarm indicator lamps that are turned on by the fire alarm corresponding to the current limit of the transmission line is a predetermined number. For example, it is possible to turn on the alarm indicator lamp of the newly issued smoke detector while limiting the number to five lamps.

（発報表示灯の表示形態による効果）
制御部は、保守点検時に、所定の煙感知器とそれ以外の煙感知器とで、発報表示灯の表示形態を異ならせるため、火元の感知器と直近で発報した感知器とを区別することができる。
(Effect of the display form of the alarm indicator)
At the time of maintenance and inspection, the control unit uses the fire source detector and the latest smoke detector to make the display form of the alarm indicator different between the specified smoke detector and other smoke detectors. Can be distinguished.

（固定値として設定した最大点灯数の効果）
また、制御部は、発報表示灯の最大点灯数を所定の固定値として設定するようにしたため、加煙試験により発報した煙感知器から煙が抜けるのを待つことなく次の煙感知器の加煙試験を行っても、受信機からの伝送路の電流制限を満たす最大点灯数を例えば５灯とする発報表示灯の点灯が維持できる。
(Effect of the maximum number of lights set as a fixed value)
In addition , since the control unit sets the maximum number of lighting of the alarm indicator lamp as a predetermined fixed value, the next smoke detector does not have to wait for the smoke to escape from the smoke detector issued by the smoke test. Even if the smoke test is performed, the lighting of the alarm indicator lamp whose maximum number of lightings satisfying the current limit of the transmission line from the receiver is 5, for example, can be maintained.

（回線電流から動的に設定する最大点灯数の効果）
また、制御部は、受信機と複数の煙感知器を接続する伝送路に流れる回線電流を測定して所定の定格許容電流との差電流を求め、差電流を発報表示灯１台当りの点灯電流で除算して発報表示灯の点灯可能数を求め、点灯可能数を現在点灯中の発報表示灯の数に加算して最大点灯数を求めて設定するようにしたため、煙感知器の加煙試験中に実際に流れる回線電流を測定して定格許容電流以内となる発報表示灯の最大点灯数が動的に設定され、確実に、定格許容電流を超えない電流制限を満たす発報表示灯の点灯数に制御することができる。
(Effect of the maximum number of lights dynamically set from the line current)
In addition , the control unit measures the line current flowing in the transmission line connecting the receiver and multiple smoke detectors, obtains the difference current from the predetermined allowable allowable current, and determines the difference current per alarm indicator lamp. The smoke detector is set by dividing by the lighting current to obtain the number of lit alarms that can be lit, and adding the number of lits to the number of currently lit alarms to obtain the maximum number of lits. The maximum number of alarm indicators that are within the rated allowable current by measuring the line current that actually flows during the smoke test is dynamically set, and the current limit that does not exceed the rated allowable current is surely satisfied. The number of lighting of the alarm indicator can be controlled.

（所定時間経過後の発報表示灯の消灯による効果）
また、制御部は、保守点検時に、発報した煙感知器に点灯指示信号を送信してから復旧信号を受信することなく所定時間が経過した場合、煙感知器に消灯指示信号を送信して発報表示灯を消灯させるようにしたため、煙感知器から加煙試験による煙が抜けて復旧するまでに時間がかかっても、所定時間を超えると発報表示灯が消灯され、不必要に試験済みの煙感知器の発報表示灯が点灯し続けて回線電流が増加した状態が継続することを防止する。
(Effect of turning off the alarm indicator after the specified time has passed)
In addition, the control unit transmits a turn-off instruction signal to the smoke detector when a predetermined time has elapsed without receiving the recovery signal after transmitting the lighting instruction signal to the smoke detector that issued the alarm during maintenance and inspection. Since the alarm indicator light is turned off, even if it takes time for the smoke detector to recover from the smoke from the smoke test, the alarm indicator lamp will be turned off after the specified time, and the test will be unnecessary. It prevents the alarm indicator lamp of the smoke detector that has already been turned on and the line current increased continuously.

（発報表示灯消灯中の煙感知器を受信機で表示する効果）
また、受信機は、発報中の煙感知器を特定する情報を表示する機能と、火災信号を受信した煙感知器のうち復旧信号を受信していないものであって発報表示灯が消灯している煙感知器を特定する情報を表示する機能と、を有するようにしたため、受信機において、試験発報しているが発報表示灯が消灯されて復旧待ちとなっている煙感知器を知ることができる。
(Effect of displaying the smoke detector with the alarm indicator off on the receiver)
In addition, the receiver has a function to display information that identifies the smoke detector that is issuing a fire signal, and the smoke detector that has received the fire signal but has not received the recovery signal, and the alarm indicator light is turned off. Since it has a function to display information that identifies the smoke detector that is being used, the smoke detector that has issued a test alarm in the receiver but has the alarm indicator light turned off and is waiting for recovery. Can be known.

（一斉消灯命令の効果）
また、制御部は、保守点検時に、全ての煙感知器に発報表示灯を消灯させる一斉消灯指示信号を送信して発報表示灯を消灯させるようにしたため、例えば全ての煙感知器の加煙試験の終了したときに、発報表示灯が点灯して復旧待ちとなっている煙感知器に対し一斉消灯指示信号を送信して消灯させて定常監視状態に戻すことができる。
(Effect of simultaneous turn-off command)
In addition, during maintenance and inspection , the control unit sends a simultaneous turn-off instruction signal to turn off the alarm indicators to all smoke detectors so that the alarm indicators are turned off. Therefore, for example, all smoke detectors are added. When the smoke test is completed, the alarm indicator lights up and a simultaneous turn-off instruction signal is sent to the smoke detectors waiting for recovery to turn them off and return to the steady monitoring state.

（復旧無しで真火災と判断する効果）
また、制御部は、保守点検時に、火災信号を受信した煙感知器のうち復旧信号を受信していないものであって発報表示灯が消灯している煙感知器のうち、火災信号を受信してから所定の時間が経過しても復旧信号を受信しない煙感知器について、真に火災が発生しているとみなし発報表示灯を点灯させるようにしたため、伝送路の電流制限に対応して発報表示灯の点灯数を制限するために発報表示灯を消灯させていても、火災発報が継続している場合は真に火災が発生しているとみなして消灯させた発報表示灯を点灯させて確実に火災発報を表示させることができる。

(Effect of judging a true fire without restoration)
In addition, the control unit receives the fire signal among the smoke detectors that received the fire signal at the time of maintenance and inspection but did not receive the recovery signal and the alarm indicator light was off. For smoke detectors that do not receive a recovery signal even after a specified period of time has passed since then, it is considered that a fire has really occurred and the alarm indicator light is turned on, so it corresponds to the current limit of the transmission line. Even if the alarm indicator light is turned off to limit the number of lights on, if the fire alarm continues, it is considered that a fire has really occurred and the alarm is turned off. The indicator light can be turned on to reliably display the fire alarm.

火災報知設備の概要を示した説明図Explanatory drawing showing the outline of the fire alarm system 煙感知器の実施形態を示したブロック図Block diagram showing an embodiment of a smoke detector 受信機の試験制御部による加煙試験制御を示したフローチャートFlow chart showing smoke test control by the test control unit of the receiver 受信機の試験制御部による発報表示灯点灯数演算を示したフローチャートA flowchart showing the calculation of the number of lighting of the alarm indicator lamp by the test control unit of the receiver.

［火災報知設備］
（火災報知設備の概要）
図１は火災報知設備の概要を示した説明図であり、受信機から引き出されたループ伝送路に煙感知器を接続した設備を例にとっている。 [Fire alarm system]
(Overview of fire alarm system)
FIG. 1 is an explanatory diagram showing an outline of a fire alarm system, and takes as an example a facility in which a smoke detector is connected to a loop transmission line drawn from a receiver.

図１に示すように、火災報知設備が設置された建物の一階の管理人室などには例えばＲ型の受信機１０が設置され、受信機１０から警戒区域に対し一対の信号線１４ａ，１４ｂを用いたループ伝送路１２が引き出されている。 As shown in FIG. 1, for example, an R-type receiver 10 is installed in a manager's room on the first floor of a building in which a fire alarm system is installed, and a pair of signal lines 14a from the receiver 10 to a caution area. The loop transmission line 12 using 14b is pulled out.

ループ伝送路１２には固有のアドレスが設定された伝送機能を有する複数の煙感知器１８が感知器ベース１６を介して着脱自在に接続されている。ループ伝送路１２に接続される煙感知器１８に設定される最大アドレス数は例えば２５５としており、ループ伝送路１２には最大２５４台の煙感知器１８が接続できる。 A plurality of smoke detectors 18 having a transmission function in which a unique address is set are detachably connected to the loop transmission line 12 via a sensor base 16. The maximum number of addresses set in the smoke detector 18 connected to the loop transmission line 12 is, for example, 255, and a maximum of 254 smoke detectors 18 can be connected to the loop transmission line 12.

煙感知器１８には発報表示灯４８が設けられ、火災発報した場合は受信機１０からの指示で点灯され、火災復旧した場合も受信機１０からの指示で消灯される。 The smoke detector 18 is provided with a warning indicator light 48, which is turned on by an instruction from the receiver 10 when a fire is reported, and is turned off by an instruction from the receiver 10 when the fire is restored.

（受信機の機能構成）
受信機１０は、受信制御部２０、伝送部２２、操作部２３、表示部２４、警報部２５、移報部２６、断線監視制御部２８及び切替回路部３０ａ，３０ｂを備える。 (Functional configuration of receiver)
The receiver 10 includes a reception control unit 20, a transmission unit 22, an operation unit 23, a display unit 24, an alarm unit 25, a transfer unit 26, a disconnection monitoring control unit 28, and switching circuit units 30a and 30b.

受信制御部２０はＣＰＵ、メモリ、各種の入出力ポート等を備えたコンピュータ回路等とする。伝送部２２は、ループ伝送路１２に接続した煙感知器１８との間で、所定の通信プロトコルに従って信号を送受信する。 The reception control unit 20 is a computer circuit or the like provided with a CPU, a memory, various input / output ports, and the like. The transmission unit 22 transmits / receives a signal to / from the smoke detector 18 connected to the loop transmission line 12 according to a predetermined communication protocol.

伝送部２２から煙感知器１８に対する下り信号は電圧モードで伝送している。この電圧モードの信号は、ループ伝送路１２の線路電圧を例えば１８ボルトと３０ボルトの間で変化させる電圧パルスとして伝送される。 The downlink signal from the transmission unit 22 to the smoke detector 18 is transmitted in the voltage mode. The signal in this voltage mode is transmitted as a voltage pulse that changes the line voltage of the loop transmission line 12 between, for example, 18 volts and 30 volts.

これに対し煙感知器１８から受信機１０に対する上り信号は電流モードで伝送される。この電流モードにあっては、ループ伝送路１２に伝送データのビット１のタイミングで信号電流を流し、いわゆる電流パルス列として上り信号が受信機に伝送される。 On the other hand, the upstream signal from the smoke detector 18 to the receiver 10 is transmitted in the current mode. In this current mode, a signal current is passed through the loop transmission line 12 at the timing of bit 1 of the transmission data, and an uplink signal is transmitted to the receiver as a so-called current pulse train.

（火災監視制御部）
受信機１０の受信制御部２０にはＣＰＵによるプログラムの実行で実現される機能として、火災監視制御部３２の機能が設けられる。 (Fire monitoring and control unit)
The reception control unit 20 of the receiver 10 is provided with the function of the fire monitoring control unit 32 as a function realized by executing a program by the CPU.

火災監視制御部３２は、通常の監視中にあっては、一定周期毎に、伝送部２２に指示して、一括ＡＤ変換コマンドを含むブロードキャストの一括ＡＤ変換信号を送信しており、この一括ＡＤ変換信号を受信した煙感知器１８は、煙濃度をセンサデータとして検出して保持する。続いて、火災監視制御部３２は、端末アドレスを順次指定したポーリングコマンドを含む呼出信号を送信している。 During normal monitoring, the fire monitoring control unit 32 instructs the transmission unit 22 to transmit a broadcast batch AD conversion signal including a batch AD conversion command at regular intervals, and this batch AD is transmitted. The smoke detector 18 that has received the conversion signal detects and holds the smoke concentration as sensor data. Subsequently, the fire monitoring control unit 32 transmits a call signal including a polling command in which terminal addresses are sequentially specified.

煙感知器１８は自己アドレスに一致するアドレスを持つ呼出信号を受信すると、そのとき保持しているセンサデータを含む応答信号を受信機１０に送信する。また、煙感知器１８は火災を検出すると受信機１０に対し火災割込み信号を送信する。 When the smoke detector 18 receives a call signal having an address matching its own address, it transmits a response signal including the sensor data held at that time to the receiver 10. Further, when the smoke detector 18 detects a fire, it transmits a fire interrupt signal to the receiver 10.

火災監視制御部３２は伝送部２２を介して火災割込み信号を受信するとグループ検索コマンド信号を送信して火災を検出している煙感知器１８を含むグループを特定し、続いて、グループ内検索コマンド信号を送信して火災を検出している煙感知器１８のアドレスを特定し、火災警報を出力すると共に火災発生アドレスを表示し、その後、特定した煙感知器から火災データを収集して監視する制御を行う。 When the fire monitoring control unit 32 receives the fire interruption signal via the transmission unit 22, it transmits a group search command signal to identify the group including the smoke detector 18 detecting the fire, and then the group search command. It sends a signal to identify the address of the smoke detector 18 that is detecting the fire, outputs a fire alarm and displays the fire occurrence address, and then collects and monitors fire data from the identified smoke detector. Take control.

また、火災監視制御部３２は、煙感知器１８の火災発報を判別すると、火災発報アドレスを指定した発報表示灯４８の点灯指示コマンドを含む点灯指示信号を送信し、発報した煙感知器１８の発報表示灯４８を点灯させる制御を行う。 Further, when the fire monitoring control unit 32 determines the fire alarm of the smoke detector 18, it transmits a lighting instruction signal including a lighting instruction command of the alarm indicator lamp 48 designated with the fire alarm address, and emits smoke. Control is performed to turn on the alarm indicator lamp 48 of the detector 18.

また、火災監視制御部３２は、煙感知器１８の火災発報後に火災復旧を判別すると、火災復旧アドレスを指定した発報表示灯４８の消灯指示コマンドを含む消灯指示信号を送信し、火災発報した煙感知器１８の発報表示灯４８を消灯させる制御を行う。 Further, when the fire monitoring control unit 32 determines that the fire has been restored after the smoke detector 18 has issued a fire, the fire monitoring control unit 32 transmits an extinguishing instruction signal including an extinguishing instruction command for the alarm indicator lamp 48 designated with the fire recovery address, and the fire is started. Control is performed to turn off the alarm indicator lamp 48 of the reported smoke detector 18.

（断線監視制御部）
受信機１０の断線監視制御部２８は、ループ伝送路１２の終端で得られる信号電圧を検出して監視しており、ループ伝送路１２に断線が発生すると信号電圧が断たれて検出できなくなることで断線を検出し、リレー接点やスイッチ素子を用いた切替回路部３０ａ，３０ｂをオン作動することで、ループ伝送路１２の終端に伝送部２２を接続し、ループ伝送路１２の両端から断線位置までの間の伝送路に対し並列的に信号の送受信を行うことで、断線障害をリカバリーする。 (Disconnection monitoring control unit)
The disconnection monitoring control unit 28 of the receiver 10 detects and monitors the signal voltage obtained at the end of the loop transmission line 12, and when the disconnection occurs in the loop transmission line 12, the signal voltage is disconnected and cannot be detected. By detecting the disconnection at By transmitting and receiving signals in parallel to the transmission lines up to, the disconnection failure is recovered.

（試験制御部）
受信機１０の受信制御部２０にはＣＰＵによるプログラムの実行で実現される機能として、試験制御部３４の機能が設けられる。試験制御部３４は、定期点検の際に、検査員３８が試験治具３６を使用して煙感知器１８の加煙試験を行う場合、受信機１０における所定の操作による保守点検モードの設定で動作する。受信機１０で保守点検モードが設定されると、主音響停止、地区音響停止、移報信号による連動停止等が行われる。 (Test control unit)
The reception control unit 20 of the receiver 10 is provided with the function of the test control unit 34 as a function realized by executing a program by the CPU. When the inspector 38 uses the test jig 36 to perform a smoke test of the smoke detector 18, the test control unit 34 sets the maintenance / inspection mode by a predetermined operation in the receiver 10. Operate. When the maintenance / inspection mode is set in the receiver 10, the main sound stop, the district sound stop, the interlocking stop by the transfer signal, and the like are performed.

保守点検モードの設定で動作した試験制御部３４は、煙感知器１８の加煙試験による発報による火災信号を受信すると、発報した煙感知器１８のアドレスを表示部２４のディスプレイ又は８セグメント表示器に表示し、発報を受信表示する。 When the test control unit 34 operated in the maintenance / inspection mode setting receives the fire signal generated by the smoke test of the smoke detector 18, the address of the smoke detector 18 that has been issued is displayed on the display of the display unit 24 or 8 segments. Display on the display and receive and display the alarm.

保守点検モードを設定した場合にも、火災監視制御部３２は、一定周期毎に、伝送部２２に指示して、一括ＡＤ変換コマンドを含むブロードキャストの一括ＡＤ変換信号を送信しており、この一括ＡＤ変換信号を受信した煙感知器１８は、煙濃度をセンサデータとして検出して保持する。続いて、火災監視制御部３２は、端末アドレスを順次指定したポーリングコマンドを含む呼出信号を送信している。煙感知器１８は自己アドレスに一致するアドレスを持つ呼出信号を受信すると、そのとき保持しているセンサデータを含む応答信号を受信機１０に送信する。 Even when the maintenance / inspection mode is set, the fire monitoring control unit 32 instructs the transmission unit 22 at regular intervals to transmit a broadcast batch AD conversion signal including a batch AD conversion command, and this batch AD conversion signal is transmitted. The smoke detector 18 that has received the AD conversion signal detects and holds the smoke concentration as sensor data. Subsequently, the fire monitoring control unit 32 transmits a call signal including a polling command in which terminal addresses are sequentially specified. When the smoke detector 18 receives a call signal having an address matching its own address, it transmits a response signal including the sensor data held at that time to the receiver 10.

煙感知器１８は加煙試験により検煙部に煙が流入して煙濃度検出信号が所定の火災レベルとなる閾値濃度を超えると発報し、受信機１０に対し発報による火災割込み信号を送信する。 The smoke detector 18 issues a report when smoke flows into the smoke detection unit in a smoke test and the smoke concentration detection signal exceeds a threshold concentration that becomes a predetermined fire level, and a fire interruption signal due to the alarm is sent to the receiver 10. Send.

火災監視制御部３２は伝送部２２を介して発報による火災割込み信号を受信するとグループ検索コマンド信号を送信して火災を検出している煙感知器１８を含むグループを特定し、続いて、グループ内検索コマンド信号を送信して発報している煙感知器１８のアドレスを特定し、発報した煙感知器１８のアドレスを表示すると共に試験制御部３４に発報アドレスを通知する制御を行う。 When the fire monitoring control unit 32 receives the fire interruption signal due to the alarm via the transmission unit 22, it transmits a group search command signal to identify the group including the smoke detector 18 detecting the fire, and then the group. The inside search command signal is transmitted to identify the address of the smoke detector 18 that has issued a fire, the address of the smoke detector 18 that has issued a fire is displayed, and the test control unit 34 is controlled to notify the alarm address. ..

試験制御部３４は、火災監視制御部３２から発報アドレスの通知を受けると、この発報アドレスを指定した発報表示灯４８の点灯指示コマンドを含む点灯指示信号を送信し、発報した煙感知器１８の発報表示灯４８を点灯させる制御を行う。 When the test control unit 34 receives the notification of the alarm address from the fire monitoring control unit 32, the test control unit 34 transmits a lighting instruction signal including a lighting instruction command of the alarm indicator lamp 48 specifying the alarm address, and emits smoke. Control is performed to turn on the alarm indicator lamp 48 of the sensor 18.

この発報した煙感知器１８の発報表示灯４８の点灯制御において、本実施形態の試験制御部３４は、現在の点灯中の発報表示灯４８の数Ｎが所定の最大点灯数Ｎｍａｘ、例えばＮｍａｘ＝５灯と比較し、最大点灯数Ｍａｘ未満の場合に、発報アドレスを指定した点灯指示信号を送信し、発報した煙感知器１８の発報表示灯４８を点灯させる制御を行う。
In the lighting control of the alarm indicator lamp 48 of the smoke detector 18 that has been notified, in the test control unit 34 of the present embodiment, the number N of the alarm indicator lamps 48 currently being lit is a predetermined maximum lighting number Nmax. For example, when compared with Nmax = 5 lights and the maximum number of lights is less than Max, a lighting instruction signal specifying a warning address is transmitted, and control is performed to turn on the warning indicator light 48 of the smoke detector 18 that has issued a warning. ..

これに対し、試験制御部３４は、現在の点灯中の発報表示灯４８の数Ｎが所定の最大点灯数Ｎｍａｘに達した場合は、発報表示灯４８の点灯が最も古い煙感知器のアドレスを指定した消灯指示信号を送信して消灯させた後に、現時点の発報の受信で得られている発報アドレスを指定した点灯指示信号を送信し、発報した煙感知器１８の発報表示灯４８を点灯させる制御を行う。ここで、発報表示灯４８の最大点灯数Ｎｍａｘは、ループ伝送路１２の定格許容電流に対応して定められている。
On the other hand, in the test control unit 34, when the number N of the currently lit warning indicator lights 48 reaches a predetermined maximum lighting number Nmax, the lighting of the notification indicator lights 48 is the oldest smoke detector. After transmitting the turn-off instruction signal with the specified address and turning it off, the light-off instruction signal with the specified issue address obtained by receiving the current issue is transmitted, and the smoke detector 18 is issued. Control is performed to turn on the indicator lamp 48. Here, the maximum number of lights Nmax of the alarm indicator 48 is determined corresponding to the rated allowable current of the loop transmission line 12.

また、火災監視制御部３２は、加煙試験により発報した煙感知器１８を含むループ伝送路１２に接続された全ての煙感知器１８に対し一括ＡＤ変換信号の送信と、その間でアドレスを順次指定した呼出信号を送信し、呼出信号に対する煙感知器１８からの煙濃度検出データを含む応答信号を受信しており、発報した煙感知器１８の検煙部から煙が抜けて煙濃度検出信号が閾値濃度を下回ると、呼出信号に対する応答信号に火災復旧情報を含めて送信する。このため火災監視制御部３２は、発報した煙感知器１８の応答信号の受信により火災復旧情報を判別すると試験制御部３４に試験復旧を通知する。 Further, the fire monitoring control unit 32 transmits a batch AD conversion signal to all smoke detectors 18 connected to the loop transmission path 12 including the smoke detector 18 issued by the smoke test, and sends an address between them. Sequentially designated call signals are transmitted, and a response signal including smoke concentration detection data from the smoke detector 18 to the call signal is received, and smoke escapes from the smoke detector of the smoke detector 18 that has been issued and the smoke concentration. When the detection signal falls below the threshold density, the response signal to the ringing signal includes the fire recovery information and is transmitted. Therefore, when the fire monitoring control unit 32 determines the fire recovery information by receiving the response signal of the smoke detector 18 that has been issued, the fire monitoring control unit 32 notifies the test control unit 34 of the test recovery.

試験制御部３４は、火災監視制御部３２から試験復旧の通知を受けると、この試験復旧に対応した煙感知器１８のアドレスを指定した発報表示灯４８の点灯消灯コマンドを含む消灯指示信号を送信し、発報した煙感知器１８の発報表示灯４８を消灯させる制御を行う。 When the test control unit 34 receives the notification of the test recovery from the fire monitoring control unit 32, the test control unit 34 issues a turn-off instruction signal including a command to turn on / off the alarm indicator lamp 48 that specifies the address of the smoke detector 18 corresponding to the test recovery. Control is performed to turn off the alarm indicator lamp 48 of the smoke detector 18 that has transmitted and issued an alarm.

このような試験制御部３４による発報表示灯４８の制御により、加煙試験により煙感知器１８の点灯中の発報表示灯４８の数が最大点灯数Ｎｍａｘ、例えば５灯に達した場合、最も古く点灯した発報表示灯４８が消灯され、加煙試験した煙感知器１８から煙が抜けて復旧することで発報表示灯４８が消灯するまで待つことなく、次の煙感知器の加煙試験を行うことができ、待ち時間がなくなることで作業効率が向上し、全ての煙感知器の加煙試験を終了するまでの時間を短くすることができる。
When the number of the alarm indicator lights 48 while the smoke detector 18 is lit reaches the maximum number of lights Nmax, for example, 5 lamps by the smoke test by the control of the alarm indicator lamp 48 by the test control unit 34. The oldest lit alarm indicator 48 is turned off, and the smoke is removed from the smoke detector 18 that has been tested for smoke, and the smoke detector 18 is restored. Smoke tests can be performed, work efficiency is improved by eliminating waiting time, and the time required to complete the smoke test of all smoke detectors can be shortened.

また、加煙試験により煙が抜けずに発報状態にある煙感知器１８の数が最大点灯数Ｎｍａｘに対応した例えば５台を超えても、実際に点灯している発報表示灯４８の数は５灯を超えることがなく、ループ伝送路１２の定格許容電流を超えないように電流制限を行った発報表示灯４８の制御ができる。
Further, even if the number of smoke detectors 18 that are in the alarm state without removing smoke in the smoke test exceeds, for example, 5 units corresponding to the maximum lighting number Nmax, the alarm indicator lamp 48 that is actually lit. The number does not exceed 5 lights, and it is possible to control the alarm indicator lights 48 in which the current is limited so as not to exceed the rated allowable current of the loop transmission line 12.

ここで、試験制御部３４により発報表示灯４８の点灯数を最大点灯数Ｎｍａｘ以下とする制御は、煙感知器１８の発報アドレスをメモリ上の先入れ先出し配列、所謂ＦＩＦＯ配列を使用して行う。
Here, the test control unit 34 controls the number of lights of the alarm indicator 48 to be equal to or less than the maximum number of lights Nmax by using the first-in first-out arrangement on the memory, the so-called FIFO arrangement. ..

例えば、アドレスＡ１～Ａ５の順に５台の煙感知器１８の加煙作業を順次行ったとすると、ＦＩＦＯ配列には
（Ａ５Ａ４Ａ３Ａ２Ａ１）
が記憶される。 For example, assuming that the smoke-adding operations of the five smoke detectors 18 are sequentially performed in the order of addresses A1 to A5, the FIFO sequence has (A5 A4 A3 A2 A1).
Is remembered.

この状態で６台目の煙感知器１８の発報を行って発報アドレスＡ６が得られたとすると、現在の発報表示灯４８の点灯数は最大点灯数５灯に達していることから、試験制御部３４はＦＩＦＯ配列の中の発報表示灯４８の点灯が最も古い煙感知器のアドレスＡ１を指定した消灯指示信号を送信して消灯させた後に、現時点で発報したアドレスＡ６を指定した消灯指示信号を送信して新に発報した煙感知器１８の発報表示灯４８を点灯させ、ＦＩＦＯ配列を
（Ａ６Ａ５Ａ４Ａ３Ａ２）
に書き替える。 Assuming that the alerting address A6 is obtained by issuing the alarm of the sixth smoke detector 18 in this state, the number of lighting of the current alarm indicator lamp 48 has reached the maximum number of lighting 5 lamps. The test control unit 34 sends a turn-off instruction signal specifying the address A1 of the smoke detector with the oldest lighting of the alarm indicator lamp 48 in the FIFO array to turn it off, and then designates the address A6 issued at the present time. The warning indicator lamp 48 of the newly issued smoke detector 18 is turned on by transmitting the extinguishing instruction signal, and the FIFO arrangement is changed (A6 A5 A4 A3 A2).
Rewrite to.

［煙感知器の機能構成］
図２は煙感知器の実施形態を示したブロック図である。図２に示すように、煙感知器１８は、電源部４０、伝送部４２、感知器制御部４４、検煙部４６及び発報表示灯４８により構成され、嵌合端子金具５０ａ，５０ｂにより感知器ベース１６に電気的且つ機械的に着脱自在に設けられている。 [Functional configuration of smoke detector]
FIG. 2 is a block diagram showing an embodiment of a smoke detector. As shown in FIG. 2, the smoke detector 18 is composed of a power supply unit 40, a transmission unit 42, a sensor control unit 44, a smoke detection unit 46, and a warning indicator lamp 48, and is detected by the fitting terminal fittings 50a and 50b. The device base 16 is electrically and mechanically detachably provided.

煙感知器１８の電源部４０は信号線１４ａ，１４ｂからなるループ伝送路１２により受信機側から供給された電源電圧を入力し、所定の定電圧を感知器電源電圧として出力する。なお、ループ伝送路１２には、伝送用の信号線１４ａ，１４ｂに加えて、専用の電源線を設けるようにしても良い。 The power supply unit 40 of the smoke detector 18 inputs the power supply voltage supplied from the receiver side by the loop transmission line 12 including the signal lines 14a and 14b, and outputs a predetermined constant voltage as the sensor power supply voltage. The loop transmission line 12 may be provided with a dedicated power supply line in addition to the transmission signal lines 14a and 14b.

伝送部４２は受信機１０の伝送部２２との間で、上り信号を電圧モードで受信し、下り信号を電流モードで送信する。 The transmission unit 42 receives the uplink signal in the voltage mode and transmits the downlink signal in the current mode with the transmission unit 22 of the receiver 10.

検煙部４６は、公知の散乱光式検煙構造をもち、所定周期で赤外ＬＥＤを用いた発光部を間欠的に発光駆動し、フォトダイオードなどの受光部で受光した散乱光の受光信号を増幅し、煙濃度検出信号を出力する。 The smoke detection unit 46 has a known scattered light type smoke detection structure, intermittently drives a light emitting unit using an infrared LED to emit light at a predetermined cycle, and receives a light receiving signal of scattered light received by a light receiving unit such as a photodiode. Amplifies and outputs a smoke concentration detection signal.

感知器制御部４４は、ＣＰＵ、メモリ、Ａ／Ｄ変換ポートを含む各種の入出力ポートを備えたコンピュータ回路で構成しており、プログラムの実行により感知器制御部４４の機能が実現される。 The sensor control unit 44 is composed of a computer circuit including various input / output ports including a CPU, a memory, and an A / D conversion port, and the function of the sensor control unit 44 is realized by executing a program.

感知器制御部４４は、伝送部４２を介して一括Ａ／Ｄ変換信号を受信すると、検煙部４６から出力されている煙濃度検出信号をＡ／Ｄ変換によりサンプリングして煙濃度検出データとして記憶し、続いて自己アドレスに一致する呼出信号を受信すると、煙濃度検出データがセットされた応答信号を生成し、伝送部４２に指示して送信する制御を行う。 When the sensor control unit 44 receives the batch A / D conversion signal via the transmission unit 42, the sensor control unit 44 samples the smoke concentration detection signal output from the smoke detection unit 46 by A / D conversion and uses it as smoke concentration detection data. When the call signal corresponding to the self-address is subsequently received after being stored, a response signal in which the smoke concentration detection data is set is generated, and control is performed to instruct the transmission unit 42 to transmit the signal.

また、感知器制御部４４は、煙濃度検出データを火災判定のための所定の煙濃度閾値と比較し、煙濃度閾値以上又は超えた場合に火災と判定し、伝送部４２に指示して火災割込み信号を送信させる制御を行う。 Further, the sensor control unit 44 compares the smoke concentration detection data with a predetermined smoke concentration threshold for fire determination, determines that the fire is above or exceeds the smoke concentration threshold, and instructs the transmission unit 42 to fire. Controls the transmission of interrupt signals.

また、感知器制御部４４は、火災割込み信号の送信に続いて受信されるグループ検索信号やグループ内検索信号に対し火災応答信号を送信する制御を行う。 Further, the sensor control unit 44 controls to transmit a fire response signal to the group search signal and the group search signal received following the transmission of the fire interrupt signal.

また、感知器制御部４４は、火災割込み信号を送信した後に、煙濃度検出データが煙濃度閾値未満に低下場合に火災復旧と判定し、自己アドレスに一致する呼出信号を受信すると、火災復旧情報がセットされた応答信号を生成し、伝送部４２に指示して送信する制御を行う。 Further, the sensor control unit 44 determines that fire recovery is performed when the smoke concentration detection data drops below the smoke concentration threshold after transmitting the fire interruption signal, and receives a call signal matching the self-address to receive fire recovery information. Is set, a response signal is generated, and a control is performed to instruct the transmission unit 42 to transmit the signal.

また、感知器制御部４４は、自己アドレスを指定した点灯指示信号を受信すると発報表示灯４８を点灯し、その後に、自己アドレスを指定した消灯指示信号を受信すると発報表示灯４８を消灯する制御を行う。 Further, the sensor control unit 44 turns on the alarm indicator lamp 48 when it receives the lighting instruction signal designated by the self-address, and then turns off the alarm indicator lamp 48 when it receives the extinguishing instruction signal designated by the self-address. Control to do.

煙感知器１８を加煙試験により発報した場合の感知器制御部４４の制御は、火災発報時と同様に、火災割込信号の送信、グループ検索信号及びグループ内検索信号に対する応答信号の送信、火災復旧情報を含む応答信号の送信、点灯指示信号の受信による発報表示灯４８の点灯、消灯指示信号の受信による発報表示灯４８の消灯が行われる。 When the smoke detector 18 is notified by the smoke test, the control of the sensor control unit 44 is the same as that at the time of the fire alarm, that is, the transmission of the fire interrupt signal, the group search signal, and the response signal to the group search signal. The transmission, the transmission of the response signal including the fire recovery information, the lighting of the alarm indicator lamp 48 by the reception of the lighting instruction signal, and the extinguishing of the alarm indicator lamp 48 by the reception of the extinguishing instruction signal are performed.

［加煙試験制御］
図３は受信機による加煙試験制御を示したフローチャートであり、図１の受信機１０に設けられた試験制御部３４による制御動作となる。 [Smoke test control]
FIG. 3 is a flowchart showing smoke test control by the receiver, and is a control operation by the test control unit 34 provided in the receiver 10 of FIG.

図３に示すように、受信機１０における保守点検モードの設定操作で起動した試験制御部３４は、ステップＳ１で煙感知器１８の発報の受信を判別するとステップＳ２に進み、発報した煙感知器１８のアドレスを表示部２４に表示して受信機１０についている試験員に報知する。 As shown in FIG. 3, when the test control unit 34 activated by the maintenance / inspection mode setting operation in the receiver 10 determines that the smoke detector 18 has received the alarm in step S1, the test control unit 34 proceeds to step S2 and emits the smoke. The address of the sensor 18 is displayed on the display unit 24 to notify the examiner attached to the receiver 10.

続いて、試験制御部３４は、ステップＳ３に進み、現在点灯中にある発報表示灯４８の点灯数Ｎを点灯最大化数Ｎｍａｘと比較し、最大点灯数Ｎｍａｘ未満の場合はステップＳ４に進み、ステップＳ２で表示した発報アドレスを指定した点灯指示信号を送信し、発報した煙感知器１８の発報表示灯４８を点灯させ、ステップＳ５に進んで発報表示灯４８の点灯数Ｎを１つ増加させる。
Subsequently, the test control unit 34 proceeds to step S3, compares the number of lights N of the alarm indicator lamp 48 currently lit with the maximum number of lights Nmax, and proceeds to step S4 if the number is less than the maximum number of lights Nmax. , A lighting instruction signal specifying the alarm address displayed in step S2 is transmitted, the alarm indicator lamp 48 of the smoke detector 18 that issued the alarm is turned on, and the process proceeds to step S5 to turn on the alarm indicator lamp 48. Is increased by one.

一方、試験制御部３４はステップＳ３で発報表示灯４８の点灯数Ｎが点灯最大化数Ｎｍａｘと比較し、最大点灯数Ｎｍａｘに達した場合はステップＳ６に進み、現在点灯中の発報表示灯４８の中の最も古い発報表示灯４８の煙感知器１８のアドレスを指定した消灯指示信号を送信して消灯させ、ステップＳ７に進んで発報表示灯４８の点灯数Ｎを１つ減少させてステップＳ３に戻る。
On the other hand, the test control unit 34 compares the lighting number N of the alarm indicator lamp 48 with the lighting maximum number Nmax in step S3, and when the maximum lighting number Nmax is reached, proceeds to step S6 and displays the alarm currently being lit. A turn-off instruction signal specifying the address of the smoke detector 18 of the oldest alarm indicator lamp 48 among the lamps 48 is transmitted to turn off the lamp, and the process proceeds to step S7 to reduce the number of lights N of the alarm indicator lamp 48 by one. Then, the process returns to step S3.

このためステップＳ３で発報表示灯４８の点灯数Ｎが点灯最大化数Ｎｍａｘ未満となったことが判別されてステップＳ４に進み、ステップＳ２で表示した発報アドレスを指定した点灯指示信号を送信し、発報した煙感知器１８の発報表示灯４８を点灯させ、ステップＳ５に進んで発報表示灯４８の点灯数Ｎを１つ増加させる。 Therefore, in step S3, it is determined that the lighting number N of the alarm indicator light 48 is less than the maximum lighting number Nmax, the process proceeds to step S4, and a lighting instruction signal specifying the alarm address displayed in step S2 is transmitted. Then, the alarm indicator lamp 48 of the smoke detector 18 that issued the alarm is turned on, and the process proceeds to step S5 to increase the number of lights N of the alarm indicator lamp 48 by one.

続いて、試験制御部３４はステップＳ８で発報した煙感知器１８の復旧を判別するとステップＳ９に進み、復旧した煙感知器１８のアドレスを指定した消灯指示信号を送信し、復旧した煙感知器１８の発報表示灯４８を消灯させ、ステップＳ１０に進んで発報表示灯４８の点灯数Ｎを１つ減少させ、ステップＳ１１で受信機における保守点検モードのオフが判別されるまで、ステップＳ１からの処理を繰り返す。 Subsequently, when the test control unit 34 determines the restoration of the smoke detector 18 issued in step S8, the process proceeds to step S9, transmits a turn-off instruction signal specifying the address of the restored smoke detector 18, and detects the restored smoke. The alarm indicator lamp 48 of the device 18 is turned off, the process proceeds to step S10, the number N of the alarm indicator lamps 48 is reduced by one, and the step S11 determines that the maintenance / inspection mode of the receiver is off. The process from S1 is repeated.

［最大点灯数の動的設定制御］
図１の受信機１０に設けられた試験制御部３４の他の実施形態として、試験制御部３４は、ループ伝送路１２に流れる回線電流Ｉｓを測定して所定の定格許容電流Ｉｔｈとの差電流を利用可能電流Ｉａとして求め、利用可能電流Ｉａを発報表示灯１台当りの点灯電流ΔＩで除算して発報表示灯４８の点灯可能数ΔＮを求め、点灯可能数ΔＮを現在点灯中の発報表示灯４８の数Ｎに加算して最大点灯数Ｎｍａｘを求めて設定する制御を行う。
[Dynamic setting control of maximum number of lights]
As another embodiment of the test control unit 34 provided in the receiver 10 of FIG. 1, the test control unit 34 measures the line current Is flowing in the loop transmission line 12 and the difference current from the predetermined rated allowable current Is. Is calculated as the available current Ia, the available current Ia is divided by the lighting current ΔI per alarm indicator lamp to obtain the litable number ΔN of the alarm indicator lamp 48, and the litable number ΔN is currently lit. Control is performed to obtain and set the maximum number of lights Nmax by adding it to the number N of the alarm indicator lights 48.

図４は受信機の試験制御部による発報表示灯の点灯数演算を示したフローチャートである。図４に示すように、試験制御部３４はステップＳ２１で保守点検モードの設定状態でループ伝送路１２に流れる回線電流Ｉｓを測定しており，続いて、ステップＳ２２に進み、定格許容電流をＩｔｈとすると、利用可能電流Ｉａを、
Ｉａ＝Ｉｔｈ－Ｉｓ
として求め、続いて、ステップＳ２３に進み、発報表示灯１台当りの点灯電流をΔＩとすると、発報表示灯４８の点灯可能台数ΔＮを
ΔＮ＝Ｉａ／ΔＩ
として求める。 FIG. 4 is a flowchart showing the calculation of the number of lightings of the alarm indicator lamp by the test control unit of the receiver. As shown in FIG. 4, the test control unit 34 measures the line current Is flowing in the loop transmission line 12 in the maintenance / inspection mode setting state in step S21, and then proceeds to step S22 to set the rated allowable current to Is. Then, the available current Ia is
Ia = Is-Is
Then, in step S23, assuming that the lighting current per alarm indicator lamp is ΔI, the number of lampable indicator lamps 48 that can be lit ΔN is ΔN = Ia / ΔI.
Ask as.

続いて、試験制御部３４はステップＳ２４に進み、現在の発報表示灯４８の点灯数をＮとすると、最大点灯数Ｎｍａｘを
Ｎｍａｘ＝Ｎ＋ΔＮ
として求め、図２のステップＳ３で使用する最大点灯数Ｎｍａｘを変更する。
Subsequently, the test control unit 34 proceeds to step S24, and assuming that the current number of lights of the alarm indicator 48 is N, the maximum number of lights Nmax is Nmax = N + ΔN.
The maximum number of lights Nmax used in step S3 of FIG. 2 is changed.

このように発報表示灯４８の点灯数を制限する最大点灯数Ｎｍａｘを回線電流の測定に基づき動的に設定することで、煙感知器１８の加煙試験中に実際に流れる回線電流に応じて定格許容電流以内に電流制限するための発報表示灯４８の最大点灯数が動的に設定され、確実に、定格許容電流を超えない電流制限を満たす発報表示灯４８の点灯数に制御することができる。

By dynamically setting the maximum number of lights Nmax that limits the number of lights of the alarm indicator 48 based on the measurement of the line current in this way, it corresponds to the line current actually flowing during the smoke detection test of the smoke detector 18. The maximum number of lightings of the alarm indicator 48 for limiting the current within the rated allowable current is dynamically set, and the number of lightings of the alarm indicator 48 that satisfies the current limit that does not exceed the rated allowable current is reliably controlled. can do.

［時間経過による発報表示灯の消灯制御］
図１の受信機１０に設けられた試験制御部３４は、図３に示した発報表示灯の制御に加え、発報の受信に基づき、点灯指示信号を発報した煙感知器に送信した場合、点灯指示信号の送信から復旧信号を受信することなく所定時間Ｔｓが経過した場合、煙感知器１８に消灯指示信号を送信して発報表示灯４８を消灯させる制御を行う。 [Control to turn off the alarm indicator light over time]
In addition to controlling the alarm indicator lamp shown in FIG. 3, the test control unit 34 provided in the receiver 10 of FIG. 1 transmitted a lighting instruction signal to the smoke detector that issued the alarm based on the reception of the alarm. In this case, when Ts has elapsed for a predetermined time without receiving the recovery signal from the transmission of the lighting instruction signal, the smoke detector 18 is transmitted with the extinguishing instruction signal to control the alarm indicator lamp 48 to be extinguished.

このように発報した煙感知器１８の発報表示灯４８を受信機１０からの制御により所定時間だけ点灯させることにより、煙感知器１８から加煙試験による煙が抜けて復旧するまでに時間がかかっても、所定時間を超えると発報表示灯４８が消灯され、不必要に試験済みの煙感知器１８の発報表示灯４８が点灯し続けて回線電流が増加した状態が継続することを防止する。 By turning on the alarm indicator light 48 of the smoke detector 18 thus issued for a predetermined time under the control of the receiver 10, it takes time for the smoke detector 18 to recover from the smoke from the smoke test. Even if it takes, the alarm indicator 48 will be turned off after a predetermined time, and the alarm indicator 48 of the smoke detector 18 that has been tested unnecessarily will continue to light and the line current will continue to increase. To prevent.

［本発明の変形例］
（伝送路）
上記の実施形態は、受信機から引き出されたループ伝送路に煙感知器を接続した火災報知設備を例にとっているが、受信機に戻ることなく警戒区域に対し一方向に引き出された伝送路に煙感知器を接続した火災報知設備についても同様に適用できる。 [Modified example of the present invention]
(Transmission line)
The above embodiment takes as an example a fire alarm system in which a smoke detector is connected to a loop transmission line drawn from a receiver, but the transmission line is pulled out in one direction to a caution area without returning to the receiver. The same applies to fire alarm equipment to which a smoke detector is connected.

（試験時以外の点滅数制限）
上記の実施形態は、受信機が保守点検モードのときに感知器の発報表示灯を消灯制御することについて記載しているが、保守点検件モードではなく実運用時において適用しても良い。 (Limitation on the number of blinks other than during the test)
Although the above embodiment describes controlling the alarm indicator lamp of the sensor to be turned off when the receiver is in the maintenance / inspection mode, it may be applied in actual operation instead of the maintenance / inspection matter mode.

実運用時においては、第１報目と第２報目については火元を特定するために感知器の発報表示灯の点灯を維持し、第３報目以降の感知器の発報表示灯から消灯するようにしても良い。つまりアドレスＡ１、Ａ２、Ａ３、Ａ４，Ａ５の順に感知器が発報した場合、さらにアドレスＡ６の感知器が発報すると、Ａ１、Ａ２、Ａ４、Ａ５、Ａ６が発報表示状態となる。 In actual operation, for the 1st and 2nd reports, the alarm indicator lamp of the detector is kept lit to identify the fire source, and the alarm indicator lamp of the detector after the 3rd report is lit. You may turn off the light from. That is, when the detectors issue alarms in the order of addresses A1, A2, A3, A4, and A5, and when the detectors at address A6 issue alarms, A1, A2, A4, A5, and A6 are in the alert display state.

このようにすることで、火元の感知器を発報表示しつつ、直近で発報した感知器を現場で確認することができる。また、この際、第１報目と第２報目の感知器の発報表示形態を例えば点灯状態とし、第３報目以降の表示形態を例えば点滅状態として表示形態を異ならせるようにして、火元の感知器と直近で発報した感知器を区別できるようにしても良い。 By doing so, it is possible to confirm the most recently issued detector at the site while displaying the alarm of the fire source. Further, at this time, the alarm display form of the first and second report detectors is set to, for example, a lighting state, and the display form of the third and subsequent reports is set to, for example, a blinking state, so that the display forms are different. It may be possible to distinguish between the detector at the source of the fire and the detector that issued the latest alarm.

また、運用時の別の形態として、火災信号を受けたのち、復旧信号を受けていない感知器について、受信機からの信号に応答がない場合、感知器に焼損等の故障が発生して発報表示灯が機能していないとみなし、当該感知器宛に発報表示灯に消灯信号を送信後、持針器が認識する現在の発報表示灯の数を減算して新たに別の感知器が発報した際には発報表示するようにしても良い。 In addition, as another form during operation, if there is no response to the signal from the receiver for the detector that has not received the recovery signal after receiving the fire signal, a failure such as burning occurs in the detector. It is considered that the alarm indicator light is not functioning, and after sending a turn-off signal to the alarm indicator lamp to the detector, the current number of alarm indicator lamps recognized by the needle holder is subtracted to make another detection. When the vessel issues an alarm, the alarm may be displayed.

（感知器について）
上記の実施形態は、煙感知器の発報表示灯について記載しているが、熱感知器が炎感知器やその他火災を検出する感知器等、他の感知器でも同様に適用できる。煙感知器は感知器内に加煙試験後に煙が残ったままとなり発報を維持するため効果が大きいが、適宜試験実施からの復旧に時間がかかる感知器に適用できる。 (About the detector)
Although the above embodiment describes the alarm indicator lamp of the smoke detector, it can be similarly applied to other detectors such as a flame detector and other detectors for detecting a fire. The smoke detector is highly effective because the smoke remains in the sensor after the smoke test and the alarm is maintained, but it can be applied to the sensor that takes time to recover from the test.

（発報表示灯消灯中の煙感知器を受信機で表示）
上記の実施形態で、受信機は発報中の煙感知器を特定する情報を表示する機能を有するが、これに加え、火災信号を受信した煙感知器のうち復旧信号を受信していないものであって発報表示灯が消灯している煙感知器を特定する情報を表示するようにしても良い。これにより、受信機において、試験発報しているが発報表示灯が消灯されて復旧待ちとなっている煙感知器を知ることができる。 (The smoke detector with the alarm indicator off is displayed by the receiver)
In the above embodiment, the receiver has a function of displaying information that identifies the smoke detector that is issuing a report, but in addition to this, smoke detectors that have received a fire signal but have not received a recovery signal. Therefore, the information that identifies the smoke detector whose alarm indicator light is off may be displayed. As a result, it is possible to know the smoke detector in the receiver, which has issued a test alarm but has the alarm indicator lamp turned off and is waiting for recovery.

（一斉消灯命令）
上記の実施形態の試験制御部は、必要に応じて、全ての煙感知器に対して発報表示灯を消灯させる一斉消灯指示信号を送信し、一斉消灯指示信号を受信した発報表示灯が点灯している煙感知器は発報表示灯を消灯させるようにしても良い。 (Simultaneous turn-off order)
The test control unit of the above embodiment transmits a simultaneous turn-off instruction signal to turn off the alarm indicator lights to all smoke detectors as necessary, and the alarm indicator lamps receiving the simultaneous turn-off instruction signals are emitted. The lit smoke detector may turn off the alarm indicator.

これにより例えば全ての煙感知器の加煙試験の終了したときに、発報表示灯が点灯して復旧待ちとなっている煙感知器に対し一斉消灯指示信号を送信して消灯させて定常監視状態に戻すことができる。 As a result, for example, when the smoke test of all smoke detectors is completed, the alarm indicator lights up and a simultaneous turn-off instruction signal is sent to the smoke detectors waiting for recovery to turn them off for steady monitoring. It can be returned to the state.

（復旧無しで真火災と判断）
上記実施形態の試験制御部は、火災信号を受信した煙感知器のうち復旧信号を受信していないものであって発報表示灯が消灯している煙感知器のうち、火災信号を受信してから所定の時間が経過しても復旧信号を受信しない煙感知器について、真に火災が発生しているとみなし発報表示灯を点灯させるようにしても良い。 (Judged as a true fire without recovery)
The test control unit of the above embodiment receives the fire signal among the smoke detectors that have received the fire signal but have not received the recovery signal and the alarm indicator light is off. For a smoke detector that does not receive a recovery signal even after a predetermined time has elapsed, it may be considered that a true fire has occurred and the alarm indicator lamp may be turned on.

これにより伝送路の電流制限に対応して発報表示灯の点灯数を制限するために発報表示灯を消灯させていても、火災発報が継続している場合は真に火災が発生しているとみなして消灯させた発報表示灯を点灯させて確実に火災発報を表示させることができる。 As a result, even if the alarm indicator is turned off in order to limit the number of alarm indicators that are lit in response to the current limit of the transmission line, if the fire alarm continues, a true fire will occur. It is possible to reliably display a fire alarm by turning on the alarm indicator lamp that is turned off as if it were.

（中継器）
上記の実施形態は、受信機から伝送路が引き出されているが、受信機と接続する中継器から引き出される伝送路に対しても同様に適用できる。この場合の中継器は、図１の受信機１０から操作部２３、表示部２４、警報部２５、移報部２６を除いた構成となり、火災監視制御部３２と試験制御部３４は受信機１０と基本的に同じとなり、火災を検出すると受信機１０に火災検出情報を伝送して火災警報を出力させ、また、受信機１０の操作による指示を受けて必要な制御を行うことになる。 (Repeater)
Although the transmission line is drawn from the receiver, the above embodiment can be similarly applied to the transmission line drawn from the repeater connected to the receiver. In this case, the repeater has a configuration in which the operation unit 23, the display unit 24, the alarm unit 25, and the transfer unit 26 are excluded from the receiver 10 in FIG. 1, and the fire monitoring control unit 32 and the test control unit 34 are the receiver 10. When a fire is detected, fire detection information is transmitted to the receiver 10 to output a fire alarm, and necessary control is performed in response to an instruction from the operation of the receiver 10.

（Ｐ型受信機）
上記の実施形態は、Ｒ型の受信機からの伝送路を介してＲ型の煙感知器を接続した火災報知設備を例にとっているが、Ｐ型の受信機から引き出した感知器回線にアドレスを設定すると共に伝送機能を備えたアドレッサブル煙感知器を接続した火災報知設備についても同様に適用できる。 (P-type receiver)
In the above embodiment, a fire alarm system in which an R-type smoke detector is connected via a transmission line from the R-type receiver is taken as an example, but an address is assigned to the detector line drawn from the P-type receiver. The same applies to fire alarm equipment that is connected to an addressable smoke detector that is set and has a transmission function.

（その他）
また、本発明はその目的と利点を損なうことのない適宜の変形を含み、更に上記の実施形態に示した数値による限定は受けない。 (others)
In addition, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above embodiments.

１０：受信機
１２：ループ伝送路
１４ａ，１４ｂ：信号線
１６：感知器ベース
１８：煙感知器
２０：受信制御部
２２，４２：伝送部
２８：断線監視制御部
３０ａ，３０ｂ：切替回路部
３２：火災監視制御部
３４：試験制御部
３６：試験治具
４０：電源部
４４：感知器制御部
４６：検煙部
４８：発報表示灯
５０ａ，５０ｂ：嵌合端子金具 10: Receiver 12: Loop transmission line 14a, 14b: Signal line 16: Sensor base 18: Smoke detector 20: Reception control unit 22, 42: Transmission unit 28: Disconnection monitoring control unit 30a, 30b: Switching circuit unit 32 : Fire monitoring control unit 34: Test control unit 36: Test jig 40: Power supply unit 44: Sensor control unit 46: Smoke detection unit 48: Alarm indicator lights 50a, 50b: Fitting terminal fittings

Claims

A fire alarm system that monitors fires by connecting multiple smoke detectors to the receiver.
The receiver is equipped with a control unit whose operation is partially different between monitoring and maintenance.
The control unit
Receives and displays the fire signal from the smoke detector.
If the number of alarm indicators currently lit is less than the predetermined maximum number of lights, a lighting instruction signal is transmitted to the smoke detector that issued the alarm to turn on the alarm indicators .
When the number of currently lit alarm indicators reaches the maximum number of lights ,
At the time of monitoring, the lighting instruction signal is transmitted to the smoke detector with the oldest lighting of the alarm indicator lamp excluding the predetermined smoke detector to turn it off, and the lighting instruction signal is transmitted to the smoke detector that has issued the alarm. Then turn on the alarm indicator light and
At the time of maintenance and inspection, the extinguishing instruction signal is transmitted to the smoke detector whose alarm indicator lamp is the oldest among all smoke detectors to turn it off, and the lighting instruction signal is sent to the smoke detector that has issued the alarm. Send and turn on the alarm indicator,
When a recovery signal is received from the smoke detector that issued the alarm, a turn-off instruction signal is transmitted to the smoke detector to turn off the alarm indicator lamp.
The predetermined smoke detector is a fire alarm system characterized by being at least the first smoke detector .

A fire alarm system that monitors fires by connecting multiple smoke detectors to the receiver .
The receiver is equipped with a control unit whose operation is partially different between monitoring and maintenance.
The control unit
Receives and displays the fire signal from the smoke detector.
If the number of alarm indicators currently lit is less than the predetermined maximum number of lights, a lighting instruction signal is transmitted to the smoke detector that issued the alarm to turn on the alarm indicators.
When the number of currently lit alarm indicators reaches the maximum number of lights,
At the time of monitoring, the lighting instruction signal is transmitted to the smoke detector with the oldest lighting of the alarm indicator lamp excluding the predetermined smoke detector to turn it off, and the lighting instruction signal is transmitted to the smoke detector that has issued the alarm. Turn on the alarm indicator light
At the time of maintenance and inspection, the extinguishing instruction signal is transmitted to the smoke detector whose alarm indicator lamp is the oldest among all smoke detectors to turn it off, and the lighting instruction signal is sent to the smoke detector that has issued the alarm. Send and turn on the alarm indicator,
When a recovery signal is received from the smoke detector that issued the alarm, a turn-off instruction signal is transmitted to the smoke detector to turn off the alarm indicator lamp.
The line current flowing in the transmission line connecting the receiver and the plurality of smoke detectors is measured to obtain the difference current from the predetermined allowable allowable current, and the difference current is the lighting current per unit of the alarm indicator lamp. The number of fire alarms that can be lit is obtained by dividing by, and the number of lit indicators is added to the number of currently lit alarm indicators to obtain and set the maximum number of lights. Facility.

A fire alarm system that monitors fires by connecting multiple smoke detectors to the receiver.
The receiver is equipped with a control unit whose operation is partially different between monitoring and maintenance.
The control unit
Receives and displays the fire signal from the smoke detector.
If the number of alarm indicators currently lit is less than the predetermined maximum number of lights, a lighting instruction signal is transmitted to the smoke detector that issued the alarm to turn on the alarm indicators.
When the number of currently lit alarm indicators reaches the maximum number of lights,
At the time of monitoring, the extinguishing instruction signal is transmitted to the smoke detector with the oldest lighting of the alarm indicator lamp excluding the predetermined smoke detector to turn it off, and the lighting instruction signal is transmitted to the smoke detector that has issued the alarm. Then turn on the alarm indicator light and
At the time of maintenance and inspection, the extinguishing instruction signal is transmitted to the smoke detector whose alarm indicator lamp is the oldest among all smoke detectors to turn it off, and the lighting instruction signal is sent to the smoke detector that has issued the alarm. Send and turn on the alarm indicator,
When a recovery signal is received from the smoke detector that issued the alarm, a turn-off instruction signal is transmitted to the smoke detector to turn off the alarm indicator lamp.
Of the smoke detectors that received the fire signal at the time of maintenance and inspection, the smoke detectors that did not receive the recovery signal and the alarm indicator light was off, and the specified time after receiving the fire signal A fire alarm system that turns on the alarm indicator light, assuming that a fire has really occurred, for a smoke detector that does not receive a recovery signal even after the passage of time.

In the fire alarm system according to any one of claims 1 to 3 .
The control unit is a fire alarm system characterized in that the maximum number of lightings of the alarm indicator lamp is set as a predetermined fixed value.

In the fire alarm system according to any one of claims 1 to 3.
At the time of maintenance and inspection, when a predetermined time elapses without receiving the recovery signal after transmitting the lighting instruction signal to the smoke detector, the control unit sends the extinguishing instruction signal to the smoke detector. A fire alarm system characterized in that the alarm indicator lamp is turned off by transmitting.

In the fire alarm system according to any one of claims 1 to 3 .
The receiver is
A function to display information that identifies the smoke detector being issued, and
A function to display information that identifies the smoke detector that has received the fire signal but has not received the recovery signal and the alarm indicator is off .
A fire alarm system characterized by having.

In the fire alarm system according to any one of claims 1 to 3.
The control unit is a fire alarm system characterized by transmitting a simultaneous turn-off instruction signal for turning off the alarm indicator to all smoke detectors at the time of maintenance and inspection to turn off the alarm indicator.

In the fire alarm system according to any one of claims 1 to 3.
The control unit is a fire alarm system characterized in that the display form of the alarm indicator lamp is different between the predetermined smoke detector and other smoke detectors at the time of maintenance and inspection .