JP2008210062A - Fire alarm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fire alarm rapidly and continuously testing a sensor part for heat, smoke or the like, and confirming fire alarm activation in time of an actual fire with power saving. <P>SOLUTION: This fire alarm has: a fire detection means 10 detecting the smoke, the heat or the like, and outputting a detection signal; a control means 11 determining whether the detection signal exceeds a fire alarming level or not, and performing the test when a test operation button 12 is operated; and a fire alarm processing means 13 giving a fire alarm and giving a test alarm having a smaller volume than the fire alarm according to the test result and the determination result of the control means 11. The control means 11 has a timer 11A starting in association with the operation of the test operation button 12, and measuring an operation time, tests an internal circuit 10 for a prescribed time after the test operation button 12 is operated, gives the test alarm according to the result, and uses the fire alarming processing means 13 to give the fire alarm when the prescribed time elapses. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a fire alarm device capable of continuously and quickly performing confirmation of internal circuit test results and confirmation of fire alarms during an actual fire with power saving.

  Recently, fire alarms equipped with an operation test function that can test whether an internal circuit test, for example, a sensor unit such as a heat detection circuit can operate normally without being disconnected or short-circuited have become widespread. ing.

  In this type of fire alarm, as shown in Patent Document 1, it is determined that the heat detection signal detected by the heat detection circuit serving as the sensor unit is at a predetermined level, and the heat detection circuit is disconnected. A test discriminating unit for discriminating the presence or absence of a short circuit, an alarm discriminating unit for discriminating that the heat detection signal detected by the heat detection circuit has exceeded a predetermined fire alarm level, and discriminating each discriminating unit According to the result, it is provided with a report processing unit for performing test report and fire report.

In such a fire alarm, another signal line leading to the test discriminating unit is derived from the signal line of the heat detection circuit and the alarm discriminating unit, and the heat detection circuit and the test are on the other signal line. A control contact that switches the connection with the discriminator is provided.When the test operation is performed, the control contact is closed, and the heat detection signal detected by the heat detection circuit is sent to the test discrimination unit. In the normal monitoring state, the control contact is not closed, and the heat detection signal detected by the heat detection circuit is sent only to the notification determination unit. When it is determined that the voltage level of the heat detection signal has exceeded the fire alarm level, the fire alarm determination signal is sent to the alarm processor to perform the fire alarm.
Japanese Patent Laid-Open No. 5-120579

  However, in the above-described conventional fire alarm, the test report and the fire report are output at the same volume, so the power consumption of the test report is large, and the battery life is reduced when it is operated by the battery. There was a problem that it was reduced, and the surrounding people mistakenly recognized the test report as a fire report.

  The present invention is proposed in consideration of such circumstances, and a first object is to provide test notification for notifying that there is no abnormality in the internal circuit, power saving, fire alarm, and so on. Is intended to provide a fire alarm that can be performed in a clearly distinguishable manner.

  A second object is to provide a fire alarm device that allows a user to continuously and quickly perform confirmation of a test report and confirmation of a fire report by a single test operation. With the goal.

  In order to achieve the above object, a fire alarm according to claim 1 of the present invention detects a fire factor such as smoke or heat, outputs a detection signal, and outputs from the fire detection means. Control means for determining whether or not the detected signal exceeds a set fire alarm level and testing the internal circuit when the test operation button is operated, and a determination result by the control means A fire alarm, and a fire alarm processing means for performing a test alarm with a sound volume smaller than that of the fire alarm according to each of the test results, and the control means, A timer that starts timing in conjunction with the operation of the test operation button and counts the operation time of the test operation button is provided, and for a predetermined time after the test operation button is operated, Depending on the test results The fire alert processing means to perform the test onset report, then, when a predetermined time has elapsed, by the fire alert processing means, characterized in that to perform the fire alarm.

  Here, the internal circuit test includes, for example, a continuity test of the heat detection circuit, but is not limited thereto, and includes an optical test of the smoke detection circuit, and is not limited thereto.

  In the fire alarm device according to claim 2, a fire detection means for detecting a fire factor such as smoke and heat and outputting a detection signal, and a detection signal output from the fire detection means are set to the fire alarm set. The control means for determining whether or not the information level has been exceeded and the test operation button is operated, and depending on each of the determination result and the test result in the control means, the fire A fire alarm processing means for performing a test notification with a volume smaller than that of the fire alarm, wherein the control means measures time in conjunction with the operation of the test operation button. And a timer for measuring the operation time of the test operation button, and during a predetermined time after the test operation button is operated, the internal circuit is tested and the test result is determined according to the test result. The test by the fire alarm processing means The test report is prohibited during the test report prohibition time, and when the test report prohibit time has elapsed, the fire report processing means It is made to perform.

  In the fire alarm device according to claim 2, unlike the fire alarm device according to claim 1, the test alarm is generated according to the test result of the internal circuit for a predetermined time after the test operation button is operated. After that, during the test report prohibition time, the test report is prohibited, and when the test report time has passed, a fire report is issued, and between the test report and the fire report In addition, it is characterized in that it has a time when it is not reported at all.

  According to the fire alarm device of the first aspect of the present invention, the internal circuit is tested for a predetermined time after the test operation button is operated, and the fire alarm processing means according to the test result. When a predetermined time has passed after that, the fire alarm processing means will cause a fire alarm to be issued. It can be performed in a manner that can be distinguished. Moreover, a test report and a fire report can be performed quickly and continuously by one test operation.

  According to the fire alarm device of claim 2, during the predetermined time after the test operation button is operated, the test alarm is issued according to the test result of the internal circuit, and thereafter during the test alarm prohibition time. Bans test alerts, and then fires when the test alert time elapses, and there is no time between test alerts and fire alerts. The user who is performing the test operation can easily understand that the test report is switched to the fire report, and the user is not suddenly switched from the test report to the fire report.

  Embodiments of the present invention will be described below.

  FIG. 1 is a block diagram showing an example of a main configuration of a fire alarm device according to the present invention, and FIG. 2 is a perspective view showing an example of the appearance of the fire alarm device. FIG. 5 is a diagram showing the relationship between the output level of the heat detection signal (which depends on the ambient temperature rise) and the reference level of the test report and fire report.

  In the example of FIG. 2, a head portion 1B provided with a sensing portion 1C is detachably fixed to a base portion 1A attached to a ceiling surface, and a test operation button B is provided at an appropriate position of the head portion 1B. However, it goes without saying that it is not limited to such an appearance.

  This fire alarm 1 has a temperature sensor 10a configured as a thermistor as a fire detection means, and is provided with a heat detection circuit 10 that outputs a heat detection signal having a voltage level corresponding to the ambient temperature. Accordingly, in this embodiment, the heat detection circuit 10 constitutes a fire factor sensor unit. In addition, a fire detection means is not restricted to the heat detection circuit 10, A smoke detection circuit etc. are included.

  The heat detection circuit 10 applies a power supply voltage to a serial connection of a temperature sensor 10a and a resistor (not shown), and takes out the voltage across this resistor as a heat detection signal. Since the temperature sensor 10a is composed of a thermistor exhibiting negative temperature characteristics, if the ambient temperature rises, the voltage at both ends of the resistor increases, whereas if the ambient temperature decreases, the voltage at both ends of the resistor decreases. .

  The fire alarm device 1 is configured by a microcomputer or the like as a control means and includes a control unit 11 having a timer 11A. An operation signal is input to the control unit 11 when the test operation button B is operated. It has come to be. The timer 11A starts timing in conjunction with the input of the operation signal associated with the operation of the test operation button B, and continues counting while the operation signal is input.

  During the execution of the normal monitoring mode, the control unit 11 performs the fire alarm when the voltage level of the heat detection signal output from the heat detection circuit 10 is in the fire alarm region (a level exceeding the reference level EA in FIG. 5). A fire alarm determination signal is output to the processing unit 13 to cause a fire alarm (the normal monitoring mode).

  When the test operation button 12 is operated during the execution of the normal monitoring mode, the control unit 11 starts the time measurement of the timer 11A, and the heat detection signal from the heat detection circuit 10 until a predetermined time elapses. When the voltage level is in the normal determination region (reference levels EL to EH in FIG. 5), a normal operation determination signal is output to the fire alarm processing unit 13, and the test alarm is performed at a volume smaller than that of the fire alarm. However, after that, when a predetermined time has elapsed, a fire alarm determination signal is output to the fire alarm processing unit 13 to cause a fire alarm (the test mode).

  Here, when the control unit 11 stops the operation of the test operation button 12 after starting the test mode, the control unit 11 stops the test mode and returns to the normal monitoring mode.

  In this example, the control unit 11 is configured by a microcomputer or the like. However, the voltage level of the heat detection signal exceeds the reference level EA, and the voltage level of the heat detection signal is between the reference levels EL to EH. In order to determine whether or not there is a comparison determination circuit, a comparison determination circuit including a comparator, a Zener diode, and a reference voltage as described in Japanese Patent Laid-Open No. 5-120579 may be incorporated.

  The fire alarm device 1 includes a fire alarm processing unit 13 as a fire alarm processing unit. When a fire alarm determination signal is received from the control unit 11, a fire alarm is issued from the speaker SP. When a normal operation confirmation signal is received from the control unit 11, a test report is issued from the speaker SP at a volume smaller than that of the fire report.

  When the heat detection signal detected by the heat detection circuit 10 exceeds a fire alarm level (for example, when the ambient temperature of the temperature sensor 10a is approximately 60 degrees), the control unit 11 outputs a fire alarm determination signal. When the heat detection signal detected by the heat detection circuit 10 is between the two reference levels EL and EH, a normal operation confirmation signal is output. Here, the reference level EL is set to the voltage level of the heat detection signal when the ambient temperature of the temperature sensor 10a is approximately 0 degrees, and the reference level EH is the case where the ambient temperature of the temperature sensor 10a is approximately 40 degrees. The voltage level of the heat detection signal is set (see FIG. 5).

  FIG. 3 is a flowchart showing an example of the basic operation in the test mode of the fire alarm of the present invention (100 to 105).

  When the test operation button 12 is operated during the execution of the normal monitoring mode, the control unit 11 starts the time measurement by the timer 11A, performs the internal circuit test, for example, the continuity test of the heat detection circuit 10, and detects the heat. When it is determined that the voltage level of the heat detection signal from the circuit 10 is in the normal determination region (reference levels EL to EH), a normal operation confirmation signal is output to the fire alarm processing unit 13 and is smaller than the fire alarm. The test is issued at a volume (100 to 103).

  Thereafter, when the timer 11A expires, the control unit 11 stops the output of the normal operation determination signal to the fire alarm processing unit 13, outputs the fire alarm determination signal, and performs the fire alarm. When the test operation of the test operation button 12 is canceled during the execution of such a test mode, the normal monitoring mode is restored.

  Here, after the timer 11A has timed out, a certain test report prohibition time is provided, during which the test report is prohibited, and when the test report prohibition time has passed, a fire report is issued. (Claim 2).

  FIG. 4 is a time chart showing the basic operation of the test mode of the present invention, and FIG. 4A shows an example of the basic operation of the test mode of the fire alarm device according to claim 1. FIG. 4B shows an example of the basic operation in the test mode of the fire alarm according to claim 2.

  In FIG. 4A, the fire alarm device 1 is in the test mode while the test operation button 12 is being operated, and during a predetermined time (3 seconds) after the test operation button 12 is operated. A test report (for example, output of a voice message such as “normal”) is performed at a volume (70 dB) smaller than the volume (90 dB) of the fire report.

  Thereafter, when a predetermined time has elapsed, a fire alarm (for example, output of a voice message such as “view, view, fire”) is performed at a volume (90 dB) larger than the test alarm (70 dB).

  As described above, the fire alarm device 1 performs the test report at a volume smaller than the fire report for a predetermined time after the test operation button 12 is operated, and then the test report is issued after the predetermined time has elapsed. Since the fire alarm is performed at a louder volume, it is possible to confirm the test of the internal circuit such as the sensor unit in a mode that can be clearly distinguished from the fire alarm. Fire alerts can be made quickly and continuously.

  On the other hand, in FIG. 4B, the fire alarm 1 executes the test mode while the test operation button 12 is operated, and during a predetermined time (2 seconds) after the test operation button 12 is operated. When it is determined that the voltage level of the heat detection signal is in the normal determination region (reference level EL to EH), a test report is issued, and then the voltage of the heat detection signal for the test report prohibition time (1 second). Even if the level is in the normal discrimination area, the test report is stopped, and when the test report prohibition time has elapsed, a fire report is issued.

  As described above, the fire alarm device 1 performs a test report for a predetermined time after the test operation button 12 is operated, and thereafter prohibits the test report during the test report prohibition time. A fire alarm is issued when the test alarm time elapses, and the user performing the test operation can easily understand that the test alarm is switched to the fire alarm. It suddenly switches to fire alarm and there is no surprise.

The block diagram which shows an example of the principal part structure of the fire alarm of this invention A perspective view showing an example of the appearance of a fire alarm Flow chart showing an example of fire alarm test mode It is a time chart which shows an example of the test mode of a fire alarm. A diagram showing the relationship between the output level of the heat detection signal (which depends on the ambient temperature rise) and the reference level for test and fire alarms

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fire alarm 10 Heat detection circuit 11 Control part 11A Timer 12 Test operation button 13 Fire alarm processing part EA Fire alarm level

Claims (2)

Fire detection means that detects a fire factor such as smoke or heat and outputs a detection signal, and whether or not the detection signal output from the fire detection means exceeds a set fire alarm level In addition, when the test operation button is operated, the control means for testing the internal circuit, and according to each of the determination result and the test result by the control means, the fire alert, the volume smaller than the fire alert A fire alarm processing means for performing the test notification of
The control means includes a timer that starts timing in conjunction with the operation of the test operation button and measures the operation time of the test operation button, and for a predetermined time after the test operation button is operated. Then, the test of the internal circuit is performed, and according to the test result, the test notification is performed by the fire alarm processing means, and then, when a predetermined time has elapsed, the fire alarm processing means A fire alarm characterized by fire alarm. Fire detection means that detects a fire factor such as smoke or heat and outputs a detection signal, and whether or not the detection signal output from the fire detection means exceeds a set fire alarm level In addition, when the test operation button is operated, the control means for testing the internal circuit, and according to each of the determination result and the test result by the control means, the fire alert, the volume smaller than the fire alert A fire alarm processing means for performing the test notification of
The control means includes a timer that starts timing in conjunction with the operation of the test operation button and measures the operation time of the test operation button, and for a predetermined time after the test operation button is operated. The test is performed by the fire alarm processing means according to the test result, and then the test alarm is prohibited during the test alarm prohibition time. Then, when the test report prohibition time has elapsed, the fire alarm is caused to be performed by the fire report processing means.

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