JP2019179351A - Fire alarm system - Google Patents

Abstract

To provide a fire alarm system capable of giving reliable fire notification.SOLUTION: A fire alarm system for notifying a fire includes: a heat detector for sensing the temperature; a smoke detector for detecting smoke; and a carbon dioxide detector provided in a heat detector and the smoke detector. A fire is notified based on at least one of heat detection information from the heat detector, smoke detection information from the smoke detector, and carbon dioxide detection information from the carbon dioxide detector.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fire alarm system.

Conventionally, a fire alarm system consisting of an automatic fire alarm system or a central monitoring system that installs multiple smoke detectors, heat detectors, etc. as fire detector terminals and detects fires based on the detection information from those fire detector terminals. It has been known.
The conventional fire alarm system has the following problems.

JP 2004-30049 A JP 2004-62492 A

  One of the most important issues in fire alarm is how to make a fire prediction to detect fire signs in the building at an early stage.

  Early fire prediction increases the possibility of extinguishing fires before they become large.

  In other words, if a sign of a fire can be found at a predetermined place in a building, it is possible to go around the predetermined place and increase the possibility of extinguishing before the scale of the fire increases. .

Here, depending on the situation of the fire, the CO ₂ concentration (carbon dioxide concentration) may rise before the generation of smoke or heat. In such a case, if the change in the CO ₂ concentration is applied to the fire prediction, It is possible to predict fire more accurately.

On the other hand, CO ₂ concentration (carbon dioxide concentration) is detected by a CO ₂ (carbon dioxide) sensor in an office building or the like, and when the CO ₂ concentration exceeds a predetermined value, air conditioning such as ventilation is performed to bring the building into a predetermined environment. An air conditioning facility or a central monitoring system that performs air conditioning control is known.

However, CO ₂ (carbon dioxide) concentration detection in office buildings and the like is only used for air conditioning, and there is no concept of using it for detecting disasters such as fires.
The present invention has been made in view of the above-described problems, and an object thereof is to provide a fire notification system capable of performing reliable fire notification.

  1st invention has a heat sensor which has a heat detection means which detects heat, and a smoke sensor which has a smoke detection means which detects smoke, At least one of the heat sensor and the smoke sensor Is provided with carbon dioxide detection means for detecting carbon dioxide, and at least one of heat detection information from the heat detection means, smoke detection information from the smoke detection means, and carbon dioxide detection information from the carbon dioxide detection means A fire notification system characterized by performing fire notification based on the above.

  2nd invention is a fire alert system concerning the 1st invention, and is that air-conditioning control is performed based on the carbon dioxide detection information from the carbon dioxide detection means.

  According to a third aspect of the present invention, in the fire alarm system according to any one of the first and second aspects, the carbon dioxide detection means is provided in a single housing with the heat detection means to constitute the heat detector. It is.

  According to a fourth aspect of the present invention, in the fire alarm system according to any one of the first and second aspects, the carbon dioxide detection means is provided in a single housing with the smoke detection means to constitute the smoke detector. It is.

  According to a fifth aspect of the present invention, in the fire alarm system according to any one of the first to fourth aspects of the present invention, based on detection information and detection information from the heat detection unit, the smoke detection unit, and the carbon dioxide detection unit, It is to make a prediction.

  A sixth invention is the fire alarm system according to the fifth invention, wherein the fire alarm system has at least one detection information of the heat sensing means and the smoke sensing means not exceeding a first predetermined value, The fire prediction is performed when a detection signal from the carbon dioxide detection means exceeds a second predetermined value.

  A seventh invention is a fire alarm system for notifying a fire, comprising a heat sensor having a heat sensor for sensing temperature, and a smoke sensor having a smoke sensor for sensing smoke, At least one of the heat sensor and the heat sensor is provided with carbon dioxide detection means for detecting carbon dioxide, and further includes heat detection information from the heat detection means, smoke detection information from the smoke detection means, and the carbon dioxide. It has fire notification means for performing fire notification based on at least one of the carbon dioxide detection information from the carbon detection means.

  The eighth invention is that in the fire notification system according to the seventh invention, the fire notification means performs air-conditioning control based on carbon dioxide detection information from the carbon dioxide detection means.

  According to a ninth aspect of the present invention, in the fire alarm system according to the seventh aspect of the invention, the fire alarm means has at least one detection information of the heat detection means and the smoke detection means not exceeding a first predetermined value, The fire prediction is performed when a detection signal from the carbon dioxide detection means exceeds a second predetermined value.

  According to the present invention, there is an effect that reliable fire notification can be performed.

It is a schematic function explanatory drawing of one Embodiment of the fire alarm system concerning this invention. It is a schematic internal circuit block diagram of the smoke detector 3 shown in FIG. It is explanatory drawing of the smoke detector 3 shown in FIG. 1, (a) is an external view of the smoke detector 3, (b) is explanatory drawing of the internal mechanism of the smoke detection circuit 3d, (c) These are explanatory drawings of the internal mechanism of the carbon dioxide concentration detection circuit unit 3p. It is a schematic internal circuit block diagram of the heat sensor 5 shown in FIG. It is explanatory drawing of the heat sensor 5 shown in FIG. 1, (a) is an external view of the heat sensor 5, (b) is explanatory drawing of the internal mechanism of the temperature detection circuit 5d, (c) These are explanatory drawings of the internal mechanism of the carbon dioxide concentration detection circuit 5e. It is an external appearance block diagram of the heat sensor 5 shown in FIG. FIG. 2 is an internal functional configuration diagram of a receiver 7 illustrated in FIG. 1. It is an internal function block diagram of the comprehensive operation panel 9 shown in FIG. It is an operation | movement flowchart of the fire alerting | reporting system 1 shown in FIG. It is a schematic function explanatory drawing of the modification of the fire alerting | reporting system 1 shown in FIG. It is a schematic internal circuit block diagram of the modification of the smoke detector 3 shown in FIG. It is a schematic internal circuit block diagram of the modification of the heat sensor 5 shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic function explanatory diagram of an embodiment of a fire alarm system according to the present invention.

As shown in FIG. 1, a fire alarm system 1 includes a smoke detector 3 for detecting the CO 2 _(carbon dioxide) as well as sensing the smoke, heat detector for detecting the CO 2 _(carbon dioxide) as well as sensing the temperature 5 and a receiver 7 to which the smoke detector 3 and the heat detector 5 are connected. The receiver 7 is connected to the general operation panel 9 and the general operation panel 9 is connected to the central monitoring system 11. The air conditioner 13 is connected to the central monitoring system 11.

  The smoke sensor 3 and the heat sensor 5 form one system.

  The receiver 7 is further connected with smoke detectors 3 and heat detectors 5 of other systems. Depending on the scale of the fire alarm system, the receiver 7 can be further provided with a plurality of systems, and, as will be described later, a system different from the system described above can also be provided.

  The receiver 7 is provided with equipment for performing a predetermined alarm process.

  The general operation panel 9 and the central monitoring system 11 are composed of a computer (PC) or a combination of a computer (PC) and a server, and receive fire notification signals from a plurality of receivers 7 as described later, The process is to be performed.

  That is, a program for performing processing as described later is set in the computer of the general operation panel 9 and the central monitoring system 11.

  Further, a repeater is provided between the receiver 7 and the smoke detector 3 and the heat detector 5, and the repeater responds to the status inquiry signal from the receiver 7 with the smoke detector 3 and the heat detector. The fire alarm signal may be output to the receiver 7 together with the terminal address of the device 5 so that the receiver 7 or the like performs a predetermined alarm process.

  In this embodiment, the smoke detector 3 and the heat detector 5 are configured to have a function of detecting carbon dioxide. However, the carbon dioxide detector is connected in series to the smoke detector 3 and the heat detector 5. It is good also as a structure to provide. That is, the smoke detection means and the carbon dioxide detection means may be provided in one casing, the smoke detection means and the carbon dioxide detection means may be provided as separate casings, or the carbon dioxide detection may be performed in the heat detection means and one casing. Even if the means is provided, the heat sensing means and the carbon dioxide sensing means may be provided as separate housings.

  FIG. 2 is a schematic internal circuit configuration diagram of the smoke detector 3 shown in FIG.

As shown in FIG. 2, the smoke detector 3 includes a power supply circuit 3 a that supplies a voltage from the transmission line to each circuit, a CPU circuit 3 b that performs fire determination based on smoke concentration detection, a transmission line and a power supply circuit 3 a A transmission circuit 3c that performs transmission with the CPU circuit 3b, a smoke concentration detection circuit 3d that is connected to the CPU circuit 3b to detect smoke concentration, and a carbon dioxide concentration detection circuit that detects the concentration of CO ₂ (carbon dioxide) 3e, and the smoke concentration detection circuit 3d and the carbon dioxide concentration detection circuit 3e are connected to a later-described smoke concentration detection LED 3h and an LED circuit 3f for controlling the carbon dioxide concentration detection light source 3q, and a CPU circuit. A confirmation lamp circuit 3g for driving a confirmation lamp for fire determination or the like is connected to 3b.

  The CPU circuit 3b performs A / D conversion on detection signals from the smoke concentration detection circuit 3d and the carbon dioxide concentration detection circuit 3e, performs time division processing, etc., and outputs the result to the transmission circuit 3c, and also detects the smoke concentration detection circuit 3d. The transmission circuit 3c processes an input signal from the transmission line and outputs it to the CPU circuit 3b, and also transmits a detection signal, an address signal, etc. from the CPU circuit 3b to the transmission line. As will be described later, the smoke density detection circuit 3d intermittently emits the smoke density detection LED light 3h, and amplifies the output from the first light receiving element 3i and outputs it to the CPU circuit 3b. To do.

Further, as will be described later, the carbon dioxide concentration detection circuit 3e causes the light source 3q for detecting the carbon dioxide concentration to emit light intermittently and detects two different wavelength bands of infrared rays from the light source 3q. The carbon dioxide concentration is detected by amplifying the output from the third light receiving elements 3s and 3u and outputting it to the CPU circuit 3b.
The detection signal from the CPU circuit 3b to the transmission circuit 3c is sent from the CPU circuit 3b to the transmission circuit 3c on the basis of a signal designating a type of smoke concentration detection and carbon dioxide concentration detection described later. It is output separately for each type of density detection.

  3 is an explanatory diagram of the smoke detector 3 shown in FIG. 1, (a) is an external view of the smoke detector 3, and (b) is an explanatory diagram of an internal mechanism of the smoke detector circuit 3d. (C) is explanatory drawing of the internal mechanism of the carbon dioxide concentration detection circuit unit 3p.

  As shown in FIG. 3B, the smoke sensing circuit 3d has, as its internal mechanism, a LED light 3h that emits light A, a light shielding plate 3k, and a first light that receives light A from the LED light 3h. It has the light receiving element 3i. Then, based on the control of the LED circuit 3f, the light emitted intermittently from the LED light 3h is received by the first light receiving element (SPD) 3i to detect the smoke density.

As shown in FIG. 3 (c), the carbon dioxide concentration detection circuit unit 3p passes a light source 3q for detecting carbon dioxide concentration that emits infrared rays A and an infrared ray A from the light source 3q through an optical filter 3r for comparison wavelength. The second light receiving element 3s that receives light and the third light receiving element 3u that receives the infrared ray A from the light source 3q via the optical filter 3t for CO ₂ absorption wavelength. Then, based on the control of the LED circuit 3f, the infrared light emitted from the light source 3q is received by the second and third light receiving elements 3s and 3u to detect two different wavelength bands, and the two detected The carbon dioxide concentration is detected from different wavelength bands.

Various attachment methods for attaching a carbon dioxide concentration detection function for detecting the concentration of CO ₂ (carbon dioxide) to the smoke detector 3 are conceivable. For example, a portion 3m of the smoke detection circuit 3d and a portion of the carbon dioxide concentration detection circuit 3e. It can be configured to overlap 3p. In addition, in FIG. 6, the example of the overlapping structure in the heat sensor 5 is shown.

  FIG. 4 is a schematic internal circuit configuration diagram of the heat detector 5 shown in FIG.

As shown in FIG. 4, the heat detector 5 includes a power supply circuit 5a that supplies a voltage from the transmission line to each circuit, a CPU circuit 5b that performs a fire determination from temperature detection, and the transmission line and power supply circuit 5a. A transmission circuit 5c that performs transmission with the circuit 5b, a temperature detection circuit 5d that is connected to the CPU circuit 5b to detect temperature, a carbon dioxide concentration detection circuit 5e that detects the concentration of CO ₂ (carbon dioxide), The carbon dioxide concentration detection circuit 5e is connected to an LED circuit 5f for controlling a carbon dioxide concentration detection LED 5h, which will be described later, and the CPU circuit 5b is connected to a confirmation light circuit 5g for driving a confirmation light for fire determination or the like. Is connected.

  The CPU circuit 5b performs A / D conversion on detection signals from the temperature detection circuit 5d and the carbon dioxide concentration detection circuit 5e, performs time division processing, etc., and outputs the result to the transmission circuit 3c. The drive control of the carbon concentration detection circuit 5e is performed, and the transmission circuit 5c processes an input signal from the transmission line and outputs it to the CPU circuit 5b, and outputs a fire signal, an address signal, etc. from the CPU circuit 5b to the transmission line. The temperature detection circuit 5d amplifies an output from a thermistor 5h, which will be described later, and outputs the amplified output to the CPU circuit 5b.

  Further, the carbon dioxide concentration detection circuit 5e intermittently causes the carbon dioxide concentration detection LED 5i to emit light, and amplifies an output from a light receiving element 5j described later that detects two different wavelength bands of light from the LED light emission. Then, the carbon dioxide concentration is detected by outputting it to the CPU circuit 5b.

  The detection signal from the CPU circuit 5b to the transmission circuit 5c is transmitted from the CPU circuit 5b for each type of temperature detection and carbon dioxide concentration detection based on a signal designating a type of temperature detection and carbon dioxide concentration detection described later. The signals are output separately to the circuit 5c.

  FIG. 5 is an explanatory diagram of the heat sensor 5 shown in FIG. 1, (a) is an external view of the heat sensor 5, and (b) is an internal mechanism explanatory diagram of the temperature detection circuit 5d. (C) is an internal mechanism explanatory drawing of the carbon dioxide concentration detection circuit 5e.

  As shown in FIG. 5B, the temperature detection circuit 5d includes, as its internal mechanism, a thermistor 5h, a temperature increase rate detection circuit 5k that detects a temperature increase rate from a detection signal from the thermistor 5h, and a switching circuit 5n. have.

As shown in FIG. 5 (c), the carbon dioxide concentration detection circuit unit 5p passes the infrared ray A emitted from the light source 5i through the optical filter 5r for comparison wavelength. The second light receiving element 5s that receives light and the third light receiving element 5u that receives the infrared ray A from the light source 5i via the optical filter 5t for CO ₂ absorption wavelength. Then, based on the control of the LED circuit 5f, the infrared light emitted from the light source 5i is received by the second and third light receiving elements 5s and 5u to detect two different wavelength bands, and the two detected The carbon dioxide concentration is detected from different wavelength bands.
Various attachment methods for attaching a carbon dioxide concentration detection function for detecting the concentration of CO ₂ (carbon dioxide) to the heat sensor 5 are conceivable. For example, as shown in FIG. The carbon concentration detection circuit unit 5p can be configured to overlap.

  FIG. 6 is an external configuration diagram of the heat sensor 5 shown in FIG.

  FIG. 7 is an internal functional block diagram of the receiver 7 shown in FIG.

  As shown in FIG. 7, the receiver 7 displays a large-sized liquid crystal display unit 7a for displaying various information such as a fire alarm and a fire prediction and a guidance display of an appropriate operation coping method in case of a fire or non-fire report. Communication control connected to the general operation panel 9 while being connected to the operation operation guidance unit 7b, the voice alarm unit 7c that warns the prediction and occurrence of troubles such as fire by voice, and the smoke detector 3 and the heat detector 5. The communication control unit 7d is connected to the large liquid crystal display unit 7a, the operation corresponding guidance unit 7b, and the voice alarm unit 7c, and controls each operation thereof.

  In addition, the communication control unit 7d transmits a signal designating the types of smoke concentration detection and carbon dioxide concentration detection to the smoke detector 3 and the heat detector 5.

  The receiver 7 can also be configured by a computer that operates with a program that achieves the above functions.

  FIG. 8 is an internal functional configuration diagram of the general operation panel 9 shown in FIG.

  As shown in FIG. 8, the general operation panel 9 includes a status display section 9a for displaying a fire occurrence place, a fire prediction place, an operation status of disaster prevention equipment, a fire support section 9b for supporting fire fighting activities, a fire A fire prediction determination unit 9c for determining occurrence of a fire and a fire prediction, and a communication control unit 9d connected to the receiver 7 and connected to the central monitoring system 11.

  The communication control unit 9d is connected to the status display unit 9a, the fire support unit 9b, and the fire prediction determination unit 9c, and controls each of these operations.

  In this embodiment, the general operation panel 9 is provided with the fire prediction determination unit 9c. However, the fire prediction determination unit may be provided on the receiver 7 side.

  The fire prediction determination unit 9c determines fire prediction as will be described later.

  FIG. 9 is an operation flowchart of the fire alarm system 1 shown in FIG.

  When the smoke sensor 3 and the heat sensor 5 are activated in step 101 of FIG. 9, the carbon dioxide concentration is detected in the carbon dioxide concentration detection circuits 3e and 5e of the smoke sensor 3 and the heat sensor 5 in step 103. It is determined whether a change has been detected.

  That is, when a change in the carbon dioxide concentration is detected in the carbon dioxide concentration detection circuit 3e of the smoke detector 3, the detection signal is subjected to A / D conversion processing in the CPU circuit 3b and from the smoke concentration detection circuit 3d. And the detection signal are time-divisionally processed and sent to the receiver 7 via the transmission circuit 3c.

  Similarly, when a change in the carbon dioxide concentration is detected in the carbon dioxide concentration detection circuit 5e of the heat detector 5, the detection signal is subjected to A / D conversion processing in the CPU circuit 5b and from the temperature detection circuit 5d. And the detection signal are time-divisionally processed and sent to the receiver 7 via the transmission circuit 5c.

  Here, as the divided transmission method of the carbon dioxide concentration detection signal and the smoke concentration detection signal or the temperature detection signal, various division transmission methods conventionally proposed can be applied.

  Then, the detection signal that detects the change in the carbon dioxide concentration is sent to the receiver 7 and then sent to the general operation panel 9, and the fire prediction occurrence determination unit 9c determines the fire prediction as will be described later. The

  Next, in step 105, whether or not a predetermined smoke concentration and a predetermined temperature (first predetermined value) are detected by the smoke concentration detection circuit 3d of the smoke detector 3 and the temperature detection circuit 5d of the heat detector 5. Is determined.

  That is, in the smoke detector 3, when the smoke density detected by the smoke density detection circuit 3d exceeds a predetermined density (first predetermined value), the CPU circuit 3b performs a fire determination, and if a fire is determined, The fire alarm signal is sent to the receiver 7 and the general operation panel 9 through the transmission circuit 3c and the transmission line together with the specific information such as the detected terminal address of the smoke detector 3.

  Similarly, in the heat detector 5, when the temperature detected by the temperature detection circuit 5d exceeds a predetermined temperature (first predetermined value), the CPU circuit 5b performs a fire determination, and if a fire is determined, A fire alarm signal is sent to the receiver 7 and the general operation panel 9 through the power transmission circuit 5c and the power transmission line together with the specific information such as the detected terminal address of the heat detector 5.

  Here, the predetermined smoke concentration and the predetermined temperature (first predetermined value), which are the criteria for fire determination, are set to be quite high in order to prevent false alarms. This is because, as will be described later, there is a possibility that a fire extinguishing operation for operating a fire extinguishing facility such as a sprinkler may be performed along with a fire alarm.

  Here, in order to specify the location of the smoke detector 3 and the heat detector 5, the identification information of the terminal address is used, but a system comprising the smoke detector 3, the heat detector 5, and the receiver 7 is used. You may make it specify with.

  Here, it is determined whether or not both the smoke concentration detected by the smoke sensor 3 and the temperature detected by the heat sensor 5 have exceeded a first predetermined value (first smoke concentration and first temperature). Either the smoke density detected by the smoke sensor 3 or the temperature detected by the heat sensor 5 may be a first predetermined value (first smoke density and first temperature). You may make it detect whether it exceeded.

  When the smoke detector 3 and the heat detector 5 make a fire determination in step 105, a predetermined alarm process is performed in the receiver 7 and the general operation panel 9 in step 111.

  That is, when a fire alarm signal is sent from the smoke sensor 3 and the heat sensor 5 to the receiver 7 and the general operation panel 9, the receiver 7 and the general operation panel 9 perform predetermined alarm processing.

  Here, the predetermined alarm processing is to notify the fire together with the location information of the smoke detector 3 and the heat detector 5 in the large liquid crystal display portion 7a and the status display portion 9a of the receiver 7 and the general operation panel 9. The process of displaying a fire and notifying a fire by an alarm sound.

  At the same time, the receiver 7 and the general operation panel 9 control a fire extinguishing operation for operating a fire extinguishing equipment such as a sprinkler (not shown) with the fire notification.

  Next, when a fire determination is not made by the smoke sensor 3 and the heat sensor 5 in step 105, it is determined in step 107 whether or not the rate of increase in carbon dioxide concentration has exceeded a predetermined value.

  That is, the fire prediction occurrence determination unit 9c of the general operation panel 9 determines that the increase rate (inclination of increase) of the carbon dioxide concentration in a predetermined time unit as the transition with time of the carbon dioxide concentration is the second predetermined value (predetermined inclination). Value) is exceeded.

  Note that the increase rate of the carbon dioxide concentration is obtained, for example, by detecting an increase in the carbon dioxide concentration at a predetermined time interval of 15 seconds.

  When the fire prediction occurrence determination unit 9c determines that the rate of increase (increase in the carbon dioxide concentration) in a predetermined time unit exceeds the second predetermined value (predetermined gradient), the process of fire prediction is performed in step 109. Is done.

  Here, it is considered that there is a possibility of fire (or gas leakage) if the increase in carbon dioxide concentration exceeds the second predetermined value in a state where the fire detection is not performed by the smoke sensor 3 and the heat sensor 5. And fire prediction processing.

  That is, in a building or the like, oxygen is sucked and carbon dioxide is discharged by people in the building, so carbon dioxide increases at a predetermined rate depending on the number of people. The increase gradually increases (the slope of the increase is gentle).

  On the other hand, the increase in carbon dioxide due to fire (or gas leakage) tends to be rapid.

  Therefore, when the increase in the carbon dioxide concentration exceeds the second predetermined value (slope), it is determined that there is a high possibility of fire (or gas leakage), and fire prediction processing is performed.

  Here, the process of fire prediction is the smoke detector 3 and the heat detector 5 that have detected a sudden increase in carbon dioxide in the large liquid crystal display section 7a and the status display section 9a of the receiver 7 and the general operation panel 9. Along with the location information, the fire prediction is displayed to notify the fire prediction.

  The manager looks around the location of the smoke detector 3 and the heat detector 5 that detected the sudden increase in carbon dioxide by displaying the fire prediction by the receiver 7 and the general operation panel 9 as the fire prediction notification means. Will be able to detect fire early.

  If the increase in carbon dioxide concentration does not exceed a predetermined value (slope), information on the increase in carbon dioxide concentration is sent from the general operation panel 9 to the central monitoring system 11, and ventilation, etc. The drive control of the air conditioning equipment 13 is performed as usual. The drive control of the air conditioning equipment 13 includes, for example, control of an air supply / exhaust damper and a total heat exchanger.

  Thus, according to the present embodiment, since a fire is predicted by detecting a rapid increase in carbon dioxide, it becomes possible to detect fire early.

  That is, in the conventional fire alarm system, in order to avoid damage caused by unnecessary fire extinguishing operations due to false alarms (failure of electronic equipment due to operation of sprinklers, etc.), a predetermined smoke concentration and a predetermined temperature that are the criteria for fire determination Is set quite high.

  Therefore, in the conventional fire alarm system, when a fire alarm is issued, there is a possibility that the fire has become large, and it has become impossible to play an important role of early detection of fire.

  In the fire alarm system operation of the above embodiment, whether or not a predetermined smoke concentration and a predetermined temperature are detected by the smoke concentration detection circuit 3d of the smoke detector 3 and the temperature detection circuit 5d of the heat detector 5 in step 105. In step 103, the carbon dioxide concentration detection circuits 3e and 5e of the smoke detector 3 and the heat detector 5 detect the change in the carbon dioxide concentration. Instead, the process of step 103 and the process of step 105 may be interchanged.

That is, first, it is determined whether or not a predetermined smoke density and a predetermined temperature are detected by the smoke density detection circuit 3d of the smoke detector 3 and the temperature detection circuit 5d of the heat sensor 5, and then the predetermined smoke density. If the predetermined temperature is not detected, the carbon dioxide concentration detection circuits 3e and 5e of the smoke sensor 3 and the heat sensor 5 may detect changes in the carbon dioxide concentration.
The present invention is not limited to the embodiments of the invention described above, and can be implemented in other modes by making appropriate modifications.

  In the above embodiment, the smoke detector 3, the heat detector 5, and the receiver 7 are connected in series to the general operation panel 9, and the smoke detector 3, the heat detector 5, and the receiver 7 of other systems are connected. However, as shown in FIG. 10, the smoke detector 3, the heat detector 5, and the control panel 15 having a gas fire extinguishing equipment function may be connected as another system. good.

  10 is a schematic functional explanatory diagram of a modified example of the fire alarm system 1 shown in FIG. 1, and FIG. 11 is a schematic internal circuit configuration diagram of a modified example of the smoke detector 3 shown in FIG. 12 is a schematic internal circuit configuration diagram of a modification of the heat sensor 5 shown in FIG.

  In the above embodiment, the smoke detector 3 is provided with the carbon dioxide concentration detection circuit 3e for detecting carbon dioxide. However, as shown in FIG. It is good also as a structure connected to the sensor 3 so that attachment or detachment is possible.

  Similarly, in the above embodiment, the carbon dioxide concentration detection circuit 5e for detecting carbon dioxide is provided in the heat detector 5, but the carbon dioxide concentration detection circuit 5e is provided in a separate housing as shown in FIG. As an alternative, the heat detector 5 may be detachably connected.

DESCRIPTION OF SYMBOLS 1 ... Fire alarm system 3 ... Smoke detector 5 ... Heat detector 7 ... Receiver 9 ... General operation panel 9c ... Fire prediction judgment part

Claims (9)

  A heat sensor having heat sensing means for sensing heat; and a smoke sensor having smoke sensing means for sensing smoke, and detecting carbon dioxide in at least one of the heat sensor and the smoke sensor. A carbon dioxide detection means is provided, and fire is reported based on at least one of heat detection information from the heat detection means, smoke detection information from the smoke detection means, and carbon dioxide detection information from the carbon dioxide detection means A fire alarm system characterized by   The fire alarm system according to claim 1, wherein air-conditioning control is performed based on carbon dioxide detection information from the carbon dioxide detection means.   The fire notification system according to claim 1, wherein the carbon dioxide detection unit is provided in one housing with the heat detection unit to constitute the heat detector.   The fire notification system according to claim 1, wherein the carbon dioxide detection unit is provided in one casing with the smoke detection unit to constitute the smoke detector.   The fire notification system according to any one of claims 1 to 4, wherein a fire is predicted based on detection information and detection information from the heat detection unit, the smoke detection unit, and the carbon dioxide detection unit. .   In the fire alarm system, at least one sensing information of the heat sensing means and the smoke sensing means does not exceed a first predetermined value, and a detection signal from the carbon dioxide sensing means exceeds a second predetermined value. The fire notification system according to claim 5, wherein the fire prediction is performed in the event of a failure. A fire alarm system for informing a fire,
A heat detector having a heat sensing means for sensing temperature;
A smoke detector having smoke sensing means for sensing smoke;
Carbon dioxide detection means for detecting carbon dioxide is provided in at least one of the heat sensor and the heat sensor,
And a fire notification means for reporting a fire based on at least one of heat detection information from the heat detection means, smoke detection information from the smoke detection means, and carbon dioxide detection information from the carbon dioxide detection means. A fire alarm system characterized by comprising:   The fire notification system according to claim 7, wherein the fire notification unit performs air conditioning control based on carbon dioxide detection information from the carbon dioxide detection unit. In the fire notification means, at least one detection information of the heat detection means and the smoke detection means does not exceed a first predetermined value, and a detection signal from the carbon dioxide detection means exceeds a second predetermined value. The fire notification system according to claim 7, wherein the fire prediction is performed in the event of a failure.

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