JP2003030762A - Fire detector, fire alarm system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire detector capable of automatically performing a fire warning processing and a fire decision processing. SOLUTION: The fire detector is constituted at least a smoke concentration measuring part 10 to measure ambient smoke concentration, a temperature measuring part 11 to measure ambient temperature and a fire judging part 12 to output a prescribed fire warning signal when either one of a smoke concentration measured or a temperature measured becomes equal to or more than prescribed thresholds. Otherwise, a prescribed fire decision signal is outputted when both of the smoke concentration measured and the temperature measured become equal to or more tan the thresholds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire detector used in a fire alarm system by connecting to a fire receiver.

[0002]

2. Description of the Related Art A conventional fire detector measures smoke density and temperature in the surroundings and outputs a predetermined fire alarm signal to a fire receiver when the measured value exceeds a predetermined threshold value. .

Using such a fire detector, in a conventional fire alarm system, two types of fire confirmation processing as shown in FIG. 3 or 4 are performed.

That is, in FIG. 3, in response to the output of a fire alarm signal from a plurality of fire detectors, the fire receiver performs a predetermined fire confirmation process to ring the bell from the entire building or to the fire station. Report the occurrence of a fire. In addition, when only one fire detector outputs a fire alarm signal, the fire receiver that has received this signal performs a predetermined fire alarm process and rings the bell from the fire floor and the floor immediately above.

On the other hand, in FIG. 4, when a fire detector outputs one fire alarm signal, the fire receiver which receives this signal
In order to carry out the above-mentioned fire alarm processing, the manager who confirms this will rush to the location where the sensor is installed, and if the fire is confirmed, the nearest transmitter will be activated. Then, the fire receiver receives this and performs the above-mentioned fire confirmation processing.

[0006]

However, these fire determination processes have the following problems. In other words, in the process shown in FIG. 3, in order to confirm the fire, a plurality of fire detectors must output the fire alarm signal, so the fire confirmation may be delayed depending on the fire occurrence location. Could be enlarged.

Further, in the processing shown in FIG. 4, after a certain sensor outputs a fire alarm signal, it is necessary for a person to actually rush to the installation site. If they could not be rushed to, there was a risk that the fire could be confirmed more slowly, which could spread the fire.

The present invention has been made in consideration of the above circumstances, and it is possible to automatically cause a fire receiver to perform a fire notification process and a fire confirmation process by a process in a single sensor. The purpose is to provide a fire detector that can.

[0009]

In order to achieve the above object, in a fire detector according to claim 1 of the present invention, a smoke concentration measuring section for measuring the smoke concentration of the surroundings and an ambient temperature are measured. When one of the temperature measurement unit, the smoke concentration measurement value and the temperature measurement value is equal to or higher than a predetermined threshold value corresponding to the temperature measurement unit, while outputting a predetermined fire alarm signal,
When both the smoke concentration measurement value and the temperature measurement value become equal to or higher than the corresponding threshold values, at least a fire determination unit that outputs a predetermined fire confirmation signal is provided.

In the fire detector according to the second aspect of the present invention, the fire determination section is configured to repeatedly perform the fire determination based on the temperature measurement value after performing the fire determination based on the smoke concentration measurement value.

In the fire detector according to the third aspect of the present invention, the fire determination unit is configured to repeatedly perform the process of performing the fire determination based on the smoke concentration measurement value after performing the fire determination based on the temperature measurement value.

In the fire alarm system according to claim 4,
At least the fire detector according to any one of claims 1 to 3 is connected to a fire receiver.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an example of a main configuration of a fire alarm system configured using the fire detector of the present invention.

This system comprises a fire detector 1 connected to a fire receiver 2 via a connecting line L. The fire detector 1 includes a smoke density measuring unit 10 that measures the smoke density of the surrounding area.
And a fire determination unit 1 that determines a fire based on the temperature measurement unit 11 that measures the ambient temperature, the smoke concentration measurement value by the smoke concentration measurement unit 10, and the temperature measurement value by the temperature measurement unit 11.
2 and a fire signal output unit 13 that outputs a signal, which will be described later, to the fire receiver 2 in response to the determination result of the fire determination unit 12.

Although the fire detector 1 shown here corresponds to a so-called P-type receiver in which the detector main body is connected by a detector line, the present invention is not limited to this example, and the detector is not limited to this example. You may use what corresponds to what is called an R type receiver which connects a main body with a multiplex transmission line.

The fire judging unit 12 judges the fire by performing the processing shown in the flowchart of FIG. That is, the fire determination unit 12 is configured to repeatedly perform the process of determining the fire based on the temperature measurement value after performing the fire determination based on the smoke concentration measurement value. As a result of the fire determination based on the smoke concentration measurement value, the smoke concentration measurement is performed. When the value becomes equal to or higher than the corresponding threshold value (for example, 15% / m) (100, 101), a smoke concentration fire alarm flag is set and a fire alarm signal is output (102, 1).
03). At this time, the fire receiver 2 performs a predetermined fire alarming process to ring the bell from the fire floor and the floor immediately above.

As a result of the fire judgment based on the smoke concentration measurement value, if the smoke concentration measurement value is less than the corresponding threshold value (1
00, 101), clear the smoke concentration fire alarm flag (1
06).

Then, if the temperature fire alarm flag, which will be described later, is set (104), the fire judging section 12 outputs a fire confirmation signal (105). At this time, the fire receiver 2 performs a predetermined fire confirmation process, sounds the bell from the entire building, and notifies the fire department of the occurrence of the fire.

Subsequently, the fire judging unit 12 judges the fire based on the temperature measurement value, and when the result of the fire judgment based on the temperature measurement value is that the temperature measurement value is equal to or higher than the corresponding threshold value (for example, 60 degrees) ( 107, 108), sets a temperature fire alarm flag and outputs a fire alarm signal (109, 1).
10). As a result of the fire determination based on the temperature measurement value, if the temperature measurement value is less than the corresponding threshold value (107, 10
8) The temperature fire alarm flag is cleared (113).

Then, the fire judging section 12 outputs a fire confirmation signal (112) if the smoke concentration fire alarm flag mentioned above is set (111).

By carrying out such a processing, the fire receiver 2 can be
It is extremely safe and convenient because the fire confirmation process can be performed automatically without the need for human confirmation operation.

In this flow chart, the process of determining the fire based on the temperature measurement value is repeatedly performed after the fire determination based on the smoke concentration measurement value is performed. You may make it repeat the process which judges the fire by a measured value.

[0023]

As can be understood from the above description, in the fire detector according to any one of claims 1 to 3 of the present invention, one of the smoke concentration measured value and the temperature measured value is When a predetermined fire alarm signal is output when the threshold value is greater than or equal to a predetermined threshold value corresponding to, while both the smoke concentration measurement value and the temperature measurement value are greater than or equal to the corresponding threshold value. Since a predetermined fire confirmation signal is output, the fire receiver can automatically perform fire notification processing and fire confirmation processing by the processing in the sensor alone, which is extremely safe and convenient. .

Further, in the fire alarm system according to claim 4, since at least the fire detector according to any one of claims 1 to 3 is connected to the fire receiver, It is possible to provide a fire alarm system that exhibits any one of the effects 1 to 3.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a main configuration of a fire alarm system configured using a fire detector of the present invention.

FIG. 2 is a flowchart for explaining the operation of the fire detector.

FIG. 3 is a diagram for explaining a problem of the conventional fire detector.

FIG. 4 is a diagram for explaining a problem of a conventional fire detector.

[Explanation of symbols]

1 ... Fire detector 2 ... Fire receiver 10 ... Smoke concentration measurement unit 11 ... Temperature measurement unit 12: Fire judgment section

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Gouji Wada             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works             Within the corporation (72) Inventor Yasuyuki Kawano             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works             Within the corporation F-term (reference) 5C085 AA01 AA03 AB01 AB08 AC03                       AC18 EA27                 5G405 AA01 AB01 AB02 AC07 AD01                       CA05 CA06

Claims (4)

[Claims] 1. A fire detector used in connection with a fire receiver, comprising a smoke concentration measuring unit for measuring ambient smoke concentration, a temperature measuring unit for measuring ambient temperature, and the smoke concentration measured value. When either one of the temperature measurement values becomes equal to or higher than the corresponding predetermined threshold value, a predetermined fire alarm signal is output, while both the smoke concentration measurement value and the temperature measurement value are output. However, the fire detector is configured to include at least a fire determination unit that outputs a predetermined fire confirmation signal when the thresholds are respectively exceeded. 2. The fire detector according to claim 1, wherein the fire determination unit repeatedly performs a process of performing a fire determination based on the temperature measurement value after performing a fire determination based on the smoke concentration measurement value. 3. The fire detector according to claim 1, wherein the fire determination unit repeatedly performs a process of performing a fire determination based on the smoke concentration measurement value after performing a fire determination based on the temperature measurement value. 4. A fire alarm system comprising at least the fire detector according to any one of claims 1 to 3 connected to a fire receiver.