JP2000093541A - Fire extinguishing facilities and discharge nozzle selecting method for fire extinguishing facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely and surely extinguish a fire by constituting a plurality of fire detectors for monitoring a fire extinguishing area so as to have a plurality of field of views having different monitoring distances, and selecting a discharge nozzle corresponding to the fire detector detecting the flame in the closer field of view of monitoring distance to discharge water. SOLUTION: When a fire source FP is situated in a position off from a reference line 11, and detected by a fire sensor, a central control board transmits a turning instruction to discharge nozzles 5, 6, and starts a fire source search by use of fire detectors 3, 4. When the fire detectors 3, 4 detect the fire source FP, the turning angles θ1, θ2 of the discharge nozzles 5, 6 at that time are transmitted to the central control board, wherein the bias angles α, β are calculated from the XY coordinates of the fire detectors 3, 4, the crossing angles ψ1, ψ2 of the reference line 11 with the base line 3S, 4S of each fire detector 3, 4 and the turning angles θ1, θ2. The bias angles α, βare compared to each other, the discharge nozzle corresponding to the fire detector having the larger bias angle is selected to start the discharge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire extinguishing system and a method for selecting a water discharge nozzle of the fire extinguishing system.

[0002]

2. Description of the Related Art A conventional fire extinguishing system is provided with a plurality of fire detectors for monitoring a fire extinguishing area, and water discharge nozzles respectively provided corresponding to the respective fire detectors. And
When the fire detector detects a fire, the water discharge nozzle corresponding to the fire detector is driven to start a fire fighting activity.

[0003]

In a fire extinguishing system having a plurality of water discharge nozzles, the capacity of a water pump is limited.
It is necessary to limit the number of water discharge nozzles that perform water discharge activities to one. As this water discharge nozzle, the one with the highest fire extinguishing efficiency must be selected. The fire extinguishing efficiency is better as the distance between the fire source and the water discharge nozzle is shorter. Conventionally, the water discharge nozzle is selected based on the first-come-first-served order in which the fire source is detected. However, there is no direct relationship between the first-come-first-served order and the distance,
The optimal water discharge nozzle is not always selected.
Therefore, there is a method in which the vertical angle of the fire source is measured and the fire source distance is measured by a trigonometric function. However, this is problematic because the apparatus becomes complicated and expensive.

[0004] In view of the above circumstances, an object of the present invention is to make it possible to easily select an optimal water discharge nozzle for fire extinguishing.

[0005]

According to the present invention, there is provided a fire extinguishing system including a plurality of fire detectors for monitoring a fire extinguishing area, and water discharge nozzles respectively provided for the respective fire detectors. Each of the fire detectors has a field of view composed of a plurality of fields of view having different monitoring distances, and among the plurality of fire detectors that have detected a fire, the fire detector has detected a fire in the field of view closer to the monitoring distance. And a selection control device for selecting a water discharge nozzle corresponding to the above.

The present invention is a fire extinguishing system including a plurality of fire detectors for monitoring a fire extinguishing area, and water discharge nozzles respectively provided for the respective fire detectors; However, when the fire detector has a middle and near field of view and a far field of view, and the fire detector has detected a fire in the middle and near field of view and the fire detector has detected a fire in the far field of view, the former of the It has a selection control device for selecting a water discharge nozzle corresponding to a fire detector.

The present invention is a fire extinguishing system including a plurality of fire detectors for monitoring a fire extinguishing area, and a water discharge nozzle provided for each of the fire detectors; , Has a medium and near field of view and a long field of view,
When there is the fire detector that has detected a fire in a medium-to-near field of view and the fire detector that has detected a fire in a long-range field of view, a water discharge nozzle corresponding to the former fire detector is selected, and each of the fire detections is performed. When the fire detector detects a fire in the field of view at the same distance, it has a selection control device for selecting a water discharge nozzle corresponding to the fire detector that detected the fire first.

[0008] The present invention is a method for selecting a water discharge nozzle for a fire extinguishing facility, comprising: a plurality of fire detectors for monitoring a fire extinguishing area; and water discharge nozzles respectively provided for the respective fire detectors; The field of view of each of the fire detectors is divided into a plurality of fields of view with different monitoring distances, and among the plurality of fire detectors that have detected a fire, correspond to the fire detector that has detected a fire with the field of view closer to the monitoring distance. It is characterized by selecting a water discharge nozzle to be used.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventor has provided a fire extinguishing system having a plurality of fire detectors for monitoring a fire extinguishing area, and water discharge nozzles respectively provided for the respective fire detectors; We considered dividing the fire detector into a plurality of monitoring fields with different monitoring distances, for example, a medium and near field and a far field, and giving priority to the monitoring field closer to the fire source. That is, the present inventors considered that the medium-to-near view, that is, a water discharge area that is less likely to be affected by obstacles and air currents in a building, and that is safe and has a high probability of reliably extinguishing fire is given priority over a far-field view.

That is, when there is a fire detector that has detected a fire in a medium-to-near field of view and a fire detector that has detected a fire in a long-range field of view, a water discharge nozzle corresponding to the former fire detector is selected. When each fire detector detects a fire in the same distance visual field, a predetermined condition, for example, a water discharge nozzle corresponding to the fire detector that detected the fire in the youngest order or the earliest is selected.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIGS. Two fire detectors 3 and 4 are provided facing each other in a rectangular room R surrounded by walls. Each of the fire detectors 3 and 4 is attached to opposing wall surfaces 1 and 2. The fire detectors 3 and 4 have a fan-shaped monitoring field of view in the vertical direction. The fire detectors 3 and 4 are infrared sensors having a plurality of, for example, eight pyroelectric elements and the like, and are built in the swirl type water discharge nozzles 5 and 6. Therefore, the fire detectors 3, 4
And the water discharge nozzles 5 and 6 always point in the same direction, so that the direction of the fire detectors 3 and 4 is the direction of the water discharge nozzles 5 and 6.

[0012] Sprinkling areas 5A, 6 of the water discharge nozzles 5, 6
A, that is, the area where water can be sprayed by turning the water discharge nozzles 5 and 6 has a semicircular shape, but both areas 5A and 6A overlap each other to protect the fire extinguishing area 8 without leakage.

The monitoring areas 3A, 4 of the fire detectors 3, 4
A, that is, the range in which a fire can be detected by turning the fire detectors 3 and 4 has a semicircular shape, but since both areas 3A and 4A overlap each other, the entire square fire monitoring area 10 is covered. It can be monitored without fail.

The monitoring areas 3A and 4A are substantially similar to the sprinkling areas (protection areas) 5A and 6A.
The monitoring areas 3A, 4A are larger than the sprinkling areas 5A, 6A.

Next, the operation of this embodiment will be described. The case where the fire source is out of the reference line 11, that is, the straight line connecting the fire detector 3 and the fire detector 4, and the reference The case where it is located on the line 11 will be described separately.

First, the case where the fire source Fp is located at a position deviating from the reference line 11 and the deviation angle described later is different will be described. When a fire detector (not shown) of an automatic fire alarm system, for example, a photoelectric separation type smoke detector detects a fire in the fire extinguishing area 8, a fire signal is sent to a central control panel (not shown). The central control panel issues a turn command to the water discharge nozzles 5 and 6. Then, the fire detectors 3 and 4 provided integrally with the water discharge nozzles 5 and 6 start the fire source search while turning.

When the two fire detectors 3 and 4 detect the fire source Fp, that is, the heat source, the turning angles θ ₁ and θ ₂ of the water discharge nozzles 5 and 6 at that time are sent to the central control panel. In the central control panel, the intersection angle ψ ₁ between the XY coordinates and the reference line 11 of the fire detectors 3 and 4 and the base lines 3S and 4S of the respective fire detectors 3 and 4 is set in advance.
ψ ₂ is input, and the declination angles, that is, the angles α and β between the straight lines 3A and 4A and the reference line 11 are calculated from the intersection angles ψ ₁ and ψ ₂ and the turning angles θ ₁ and θ _2. Is done. Note that the deviation angles have a relationship of α> β, 0 <α <π / 2, and 0 <β <π / 2. The reference line 11 is a line connecting the water discharge nozzles 5 and 6,
In the case of the present embodiment, the line is orthogonal to the wall surfaces 1 and 2.

The deviation angles α and β are compared, the larger deviation angle α is selected, and the water discharge nozzle 5 corresponding to the fire detector 3 having the deviation angle α is selected. This is because a larger deviation angle is closer to the fire source Fp.

That is, the fire detector 3, the fire detector 4, and the fire source Fp are each connected by a straight line to form a triangle.
If the perpendicular drawn from p to the reference line 11 is FpMo, the length of the straight line 3a from the fire detector 3 to the fire source Fp is represented by FpMo / sinα. The length of the straight line 4a up to Fp is represented by FpMo / sinβ.

Straight line 3a: straight line 4a = FpMo / sinα: Fp
Mo / sinβ = 1 / sinα: 1 / sinβ Since the deflection angle α> the deflection angle β, 1 / sinα <1 / sinβ, and eventually the straight line 3a <the straight line 4a.

The central control panel includes the selected fire detector 3,
That is, a water discharge command is issued to the water discharge nozzle 5. The water discharge nozzle 5
Starts water discharge toward the fire source Fp and sprays water to the watering area 5A.

Next, the case where the fire source Fe is at a position deviated from the reference line 11 and the deflection angles are equal will be described. If the two deviating angles γ are equal to each other, it cannot be selected by comparing the deviating angles. Therefore, a predetermined priority condition, for example, the fire detector 3 that has detected the high-priority or early-fire source Fe, that is, the water discharge The nozzle 5 is selected.

Further, a case where the fire source Fo is located on the reference line 11 will be described. In this case, since the deviation angle becomes zero, it cannot be selected by comparing the deviation angles. Therefore, the short-range field of view in該火source Fo is fire detectors 3,4 (d ₁ ~d _n,
D _{1 to} D _{n (n} ≧ ₁₎ ), the far field dn _{+ 1} , or Dn _{+ 1} . That is, the fire detector 3 detects the medium close range field d ₁ to d _n ... fire source Fo, near the middle when the fire detector 4 can not detect it in the middle near distance viewing D ₁ to D _n The fire detector 3 detected in the distance visual field, that is, the water discharge nozzle 5 is selected.

When both of the fire detectors 3 and 4 detect the fire source Fo from a far field of view, or when both detect the fire source Fo from a medium to near field of view, predetermined conditions, for example, priority. For example, the fire detector 3, which has detected the fire source Fo at the higher rank or earlier, that is, the water discharge nozzle 5, is selected.

In the method of selecting the water discharge nozzle based on the field of view of the fire detectors 3 and 4, since the field of view is divided into two or more, the apparatus becomes simple and inexpensive, and the transmission of the control signal becomes simple.

A second embodiment of the present invention will be described with reference to FIGS. In the circular hole H, three fire detectors 20, 21, 22 are provided at intervals in the circumferential direction. The fire detectors 20 to 22 are provided with water discharge nozzles 50, 5 and
1, 52. The water discharge nozzles 50 to 52
The gear 53 is fixed to a gear 53, and the gear 53 is connected to a swing motor 54.

The fire detectors 20 to 22 and the water discharge nozzle 5
0 to 52 will be described with reference to FIG.
22 and each of the water discharge nozzles 50 to 52 are the same, so only the fire detector 20 and the water discharge nozzle 50 will be described here. The fire detector 20 includes a flame detector 20A and an infrared sensor 20B. As shown in FIG. 5, the flame detector 20A transmits only the 4.3 μ band peculiar to the CO ₂ resonance radiation emitted by the flame at the time of the fire by the infrared filter 25 and receives the light at the light receiving unit 26. The light receiving section 26 is provided with a plurality of pyroelectric elements.

The signal received by the light receiving section 26 is output from the AC selective amplifying circuit 27 to 1 to 15 Hz which appears in a fire flame.
And extracts the fluctuation component of the AC-DC conversion circuit 2
8 to convert to a DC signal.

The DC signal converted in this manner is compared with a fire determination level in a comparison circuit 29,
After a predetermined delay at 0, if the level at which a fire can be determined continues, it is determined that a fire has occurred and the switching circuit 31
Is turned on, and a fire signal is output to the fire extinguisher control unit 66.

In FIG. 5, reference numeral 33 denotes a nonpolar circuit;
Reference numeral 34 denotes an operation indicator lamp, and reference numeral 35 denotes a constant voltage circuit 35. Further, a plurality of infrared filters 25 and light receiving sections 26 may be provided to receive a plurality of wavelengths in the vicinity of the 4.3 μ band.

The infrared sensor 20B is configured as shown in FIG. 6, and the infrared light incident through a window 40 such as sapphire that transmits infrared light is interrupted by an optical chopper 41 and passes through a lens 43 that obtains a predetermined field of view. Incident on the light receiving section 44. In the light receiving section 44, a plurality of infrared light receiving elements such as pyroelectric elements are provided.

The light receiving output of the light receiving unit 44 is extracted and amplified by an AC selective amplifying circuit 45, converted into a DC signal by an AC-DC converting circuit 46, and output to a fire extinguisher control unit 66.

In the fire detector 20, first, the direction of the fire source is specified by turning the infrared sensor 20B to detect the fire source, and thereafter, the flame detector 20A is directed toward the fire source. A fire judgment is made by detecting CO ₂ resonance radiation and fluctuation peculiar to the flame in a stationary state. Therefore, since the flame can be accurately determined, a correct fire determination can be made.

The water discharge nozzle 50 is fixed to a gear 53,
The gear 53 is rotatably supported by a water supply pipe 50P provided upright on the water supply flange 50S. A turning motor 54 having an encoder E is fixed to the water supply pipe 50P, and the motor 54 is connected to the gear 53 via a small gear 54A.

The water discharge nozzle 50 comprises a long throw head 55, a middle throw head 56, and a near throw head 57. The long throw head 55 is provided in the upper stage and has a narrower water discharge width than the middle throw head 56 but has a longer flight distance, so that water can be sprayed farther than the middle throw head 56. The near throw head 57 is provided at the lowermost stage and has a wider water discharge width than the middle throw head 56. However, since the flight distance is short, water can be sprayed only near the head.

When the fire extinguishing water is discharged from the water discharging nozzle 50, the fire extinguishing water ejected from each of the heads 55 to 57 scatters while attracting each other, so that the water discharging pattern as shown in FIG. A convex or trapezoidal water discharge pattern 60 having a large width on the rear end portion 60a side and a small width on the front end portion 60b side is formed.

Therefore, when water is discharged into the rectangular fire extinguishing area 61, the turning motor 54 is driven to rotate the gear 53, and the water discharging nozzle 50 is turned by the swing angle ω. Can be discharged. Accordingly, the amount of water sprayed outside the fire extinguishing area 61 is extremely small as compared with the conventional art, and effects such as a reduction in water loss and a reduction in water discharge flow rate can be obtained.

The fire extinguisher control unit 66 is connected to the counter 63, the motor driver 64, and the interface 65. The fire extinguisher control unit 66 is connected to the central control panel CPU.

The central control panel CPU includes a fire detector 2
The information of the nozzles 0 to 22 and the water discharge nozzles 50 to 52 is processed and controlled, and the following information is stored in advance. (1) the position of each fire detectors 20-21, i.e., the position XY coordinates of the drainage nozzle _{50~52 (X 1, Y 1)} , (X 2, Y 2),
(X _3, Y _3). The coordinates of each water discharge nozzle are, for example, water discharge nozzle 50: (1
4, 25), the water discharge nozzle 51: (26, 14), and the water discharge nozzle 52: (6, 5).

(2) Straight lines connecting adjacent water discharge nozzles 50 to 52, that is, inclination angles of reference lines L, N, and M. The inclination angles θ10 to θ12 are obtained as follows. The inclination angle θ10 of the reference line L = arctan ((25-5) / (14-6)) = 6
8 ° Inclination angle of reference line M θ11 = arctan ((14-25) / (26-14)) =
−43 ° The inclination angle θ12 of the reference line N = arctan ((14-5) / (26-6)) = 2
4 °

(3) Front azimuth angles of the water discharge nozzles 50 to 52 and reference angles. These angles are obtained by measuring the angle counterclockwise with the X-axis direction being 0 °. The front azimuth angle of each of the radiation nozzles 50 to 52 is, for example, as follows. Front azimuth angle θ13 of water discharge nozzle 50 = 270 ° Front azimuth angle of water discharge nozzle 51 = 180 ° Front azimuth angle of water discharge nozzle 52 θ15 = 52 °

The reference angle of each of the water discharge nozzles 50 to 52 is, for example, as follows. Water discharge nozzle 50 and reference line M: Reference angle θ16 = 317 ° Water discharge nozzle 50 and reference line L: Reference angle θ17 = 248 ° Water discharge nozzle 51 and reference line M: Reference angle θ18 = 137 ° Water discharge nozzle 51 and reference line N: Reference angle θ19 = 204 ° Water discharge nozzle 52 and reference line L: Reference angle θ20 = 68 ° Water discharge nozzle 52 and reference line L: Reference angle θ21 = 24 °

Next, the operation of this embodiment will be described. When a smoke detector of an automatic fire alarm (not shown) detects a fire, a fire signal is sent to the central control panel CPU. The central control panel CPU sends the fire extinguisher control unit 6 to the fire detectors 20 to 22 in the hall H corresponding to the smoke detectors and the like that have transmitted the fire signal.
A fire exploration command is issued through 6.

Then, each of the fire detectors 20 to 22
At this time, the infrared sensor 20B first makes a predetermined angle turn to search the entire monitoring area in which it is responsible. When the heat of the fire source F1 is detected, the turning angle at the time of detection of the fire source measured by the encoder E is stored in the fire extinguisher control unit 66.

When the infrared sensor 20B turns by a predetermined angle, the fire detector 20 that has found the heat of the fire source F1 returns to the turning angle when the heat of the fire source F1 was found, and changes the direction of the flame detector 20A to the fire. Turn to source F1. The flame detector 20A detects the flame of the fire source F1 in a stationary state and makes a fire judgment, and the fire extinguisher control unit 66 sends the result to the central control CPU together with the previously stored turning angle information at the time of detection of the fire source. I do.

When the fire source is located at F1 outside the reference line L connecting the fire detector 20 and the fire detector 22, the fire detectors 20 and 22 detect a fire. Shall not detect it. Fire detector 20
Is 50 ° to the right. Central control panel CPU
Waits for a "specified time" after receiving the fire signal from the fire detector 20, and waits for the next detection to occur. Then, a fire signal from the fire detector 22 is received within the prescribed time. The detection angle ε2 of the fire detector 22 is 30 ° to the left.

The central control panel CPU executes the “specified time”
Elapsed, or after receiving information of no fire detection from the fire detector 21 and collecting information from all the fire detectors, either of the two detection angles ε1, ε2, Calculate whether the nozzle is suitable for fire extinguishing. When the detection angle is right, the angle is a minus angle with respect to the front angle, and when the detection angle is left, the angle is a plus angle with respect to the front angle. Under this condition, the deviation angle with respect to the reference line L is obtained.

Calculation on the water discharge nozzle 50 side. Fire angle = Front angle + Detection angle = 270 ° -50 ° = 2
20 ° Reference angle θ17 used in the case of the opposed water discharge nozzle 52
= 248 ° Deflection angle δ1 = | Reference angle-Fire angle | = | 248 ° -2
20 ° | = 28 °

Calculation on the water discharge nozzle 52 side. Fire angle = Front angle + Detection angle = 52 ° + 30 ° = 82
° Reference angle θ20 used in the case of opposed water discharge nozzle 50
= 68 ° Deflection angle δ2 = | Reference angle-Fire angle | = | 68 °-82
° | = 14 °

The larger the deviation angle of the water discharge nozzle is, the more the fire source F1
Since the two deviation angles δ1 and δ2 are compared, the deviation angle δ1 having a large value, that is, the water discharge nozzle 50 is selected.

When the fire source is located at F2 inside the reference line M connecting the fire detector 20 and the fire detector 21, the fire detectors 20 and 21 detect a fire in the same manner as described above. The fire detector 22 shall not detect it.

It is assumed that the detection angles of the fire detectors 20 and 21 are left 25 ° and right 35 °, respectively. Calculation on the water discharge nozzle 50 side. Fire source angle = front angle + detection angle = 270 ° + 25 ° = 2
95 ° Reference angle θ16: 3 adopted in the case of the opposed water discharge nozzle 51
17 ° Deflection angle δ3 = | Reference angle−Fire angle | = | 317 ° -2
95 ° | = 22 °

Calculation on the water discharge nozzle 51 side. Fire angle = Front angle + Detection angle = 180 ° -35 ° = 1
45 ° Reference angle θ18: 1 adopted in the case of the opposed water discharge nozzle 50
37 ° Deflection angle δ4 = | Reference angle-Fire angle | = | 137 ° -1
45 ° | = 8 ° Therefore, the deviation angle δ3 of the water discharge nozzle 50 and the water discharge nozzle 51
When the deviation angle δ4 is compared, since the deviation angle δ3 is large,
The fire detector 20, that is, the water discharge nozzle 50 is selected.

In the case of the fire of the fire source F2, the fire detectors 20, 21,
When the fire detection is performed on three of the 22 nozzles, the facing relationship is calculated for all of the three water discharge nozzles 50 to 52 in the manner described above. The arrangement between the water discharge nozzles 50 and 51 is the same as that in the previous section. Here, further calculation is performed for two sets of the water discharge nozzles 50 and 52 and the water discharge nozzles 51 and 52. The detection angle of the water discharge nozzle 51 is 3 ° to the left.

In the case of the water discharge nozzles 50 and 52. Calculation on the water discharge nozzle 50 side. Fire angle = Front angle + Detection angle = 270 ° + 25 ° = 2
95 ° Reference angle θ17: 2 adopted in the case of the nozzle 52 opposed to the nozzle 52
48 ° Deflection angle δ5 = | Reference angle-Fire angle | = | 248 ° -2
95 ° | = 47 °

Calculation on the water discharge nozzle 52 side. Fire angle = Front angle + Detection angle = 52 ° + 3 ° = 55 ° Reference angle θ20: 6 adopted in the case of the opposed water discharge nozzle 50
8 ° Deflection angle δ6 = | Reference angle-Fire angle | = | 68 ° -55
° | = 13 °

Accordingly, when the deviation angle δ5 of the water discharge nozzle 50 and the deviation angle δ6 of the water discharge nozzle 52 are compared, the water discharge nozzle 50 is selected because the deviation angle δ5 is large.

In the case of the water discharge nozzles 51 and 52. Calculation on the water discharge nozzle 51 side. Fire angle = Front angle + Detection angle = 180 ° -35 ° = 1
45 ° Reference angle θ19: 2 adopted in the case of the opposed water discharge nozzle 52
04 ° Deflection angle δ7 = | Reference angle-Fire angle | = | 240 ° -1
45 ° | = 59 °

Calculation on the water discharge nozzle 52 side. Fire angle = Front angle + Detection angle = 52 ° + 3 ° = 55 ° Reference angle θ21: 2 adopted in the case of the opposed water discharge nozzle 51
4 ° Deflection angle δ8 = | Reference angle-Fire angle | = | 24 ° -55
° | = 31 °

Therefore, the two deviating angles δ7 and δ8 are compared, and the fire detector 21 having the larger deviating angle δ7, that is, the water discharge nozzle 51, is selected.

The central control board CPU selects a water discharge nozzle from the magnitude relationship among the deviation angles δ3 to δ8 of the water discharge nozzles 50 to 52 according to a nozzle selection algorithm, that is, a selection criterion.
That is, the basic point 1 is given to the water discharge nozzle that has detected the fire source F2, and the additional point 1 is given to the larger one of the compared deviation angles (relative angles), and the total score of each water discharge nozzle is calculated. Then, the total score is compared and the largest water discharge nozzle is selected.

When the total score of each of the water discharge nozzles 50 to 52 is calculated in this way, the result is as shown in FIG. 11, and the fire detector 20, that is, the water discharge nozzle 50 has the maximum score. Therefore, the central control panel CPU selects this water discharge nozzle 50,
Issue a fire extinguishing command.

Note that more than three fire detectors, for example,
When the four fire detectors detect the fire source, the water discharge nozzle is selected in the same manner as described above. That is, the deviation angle of each water discharge nozzle is obtained, each deviation angle is scored by a nozzle selection algorithm to calculate a total score, and the maximum water discharge nozzle may be selected.

Next, the case where the fire source is located at F3 outside the reference line L and the deviation angles δ9 and δ10 are equal will be described. In this case, there is no difference even if the deviation angles are compared,
The water discharge nozzle 51 is selected according to a predetermined selection criterion.

Further, a case where the fire source is located at F4 on the reference line L will be described. In this case, since the deviation angle is zero, there is no difference even if the deviation angles are compared. Therefore, infrared sensor or detects a fire source F4 at the limit far field D _{n + 1,} it has detected a medium short range field D ₁ to D _n ......, selected by.
That is, among the infrared sensor two detecting a fire source F4, infrared sensor 20B detects a medium short distance field D _n, not detected in the medium close range field D ₁ to D _n is other infrared sensors, far When the detection is performed in the range visual field D _{n + 1} , the infrared sensor 20B is close to the fire source F4, so that the infrared sensor 20B, that is, the water discharge nozzle 50 is selected.

[0066] Also, when none of the two detected the fire source F4 of the infrared sensor detects a medium short range field D ₁ to D _n, or when it is detected in the far-field D _{n + 1} is A predetermined condition, for example, the youngest or the infrared sensor 20B that has detected the fire source F4 first, that is, the water discharge nozzle 50 is selected. In this method of selecting the water discharge nozzle based on the field of view of the infrared sensor, the field of view is divided into two or more, so that the apparatus is simple and inexpensive, and the transmission of the control signal is also simple.

When the water discharge nozzle 50 is selected as described above, the central control panel CPU issues a fire extinguishing command to the water discharge nozzle 50. The water discharge nozzle 50 reciprocates in a predetermined range, that is, performs water discharge while swinging.
Since the water discharge pattern 60 having a width of 0 is wider at the rear end portion 60a and narrower at the front end portion 60b, it is possible to uniformly spray water into the rectangular fire extinguishing region 61 only by turning the rocking angle ω. .

The present invention is not limited to the above embodiment. For example, instead of using a swirling type water discharge nozzle as a fire extinguishing device, a watering head fixed to a wall or the like may be used. Further, instead of integrally forming the fire detector and the water discharge nozzle, the swirl-type water discharge nozzle and the swirl-type fire detector may be formed separately and independently so as to turn independently of each other.

[0069]

According to the present invention, as described above, it is possible to easily select an optimal water discharge nozzle for fire extinguishing. In addition, when a fire detector with a medium-to-near field of view is selected, there is little effect of obstacles and airflow in the building,
In addition, since a fire extinguisher that can extinguish a fire can be selected with certainty, an effective fire extinguishing activity can be performed. Furthermore,
When the monitoring field of view is divided into a far field and a medium / near field, the device is simple and inexpensive, and the transmission of control signals is also simple.

[Brief description of the drawings]

FIG. 1 is a plan view showing a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is an enlarged perspective view of a main part of FIG.

FIG. 4 is a perspective view of a second embodiment of the present invention.

FIG. 5 is a block diagram of a flame detector.

FIG. 6 is an exploded view of the infrared sensor.

FIG. 7 is a view showing a water discharge pattern when the water discharge nozzle is stationary.

FIG. 8 is a diagram showing a sprinkling area when the water discharge nozzle is swung.

FIG. 9 is a layout view of a water discharge nozzle.

FIG. 10 is a diagram showing a field of view of an infrared sensor.

FIG. 11 is a diagram showing points of each water discharge nozzle calculated by a nozzle selection algorithm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall 2 Wall 3 Fire detector 4 Fire detector 5 Water discharge nozzle 6 Water discharge nozzle θ1 Swing angle θ2 Swing angle α Skew angle β Skew angle

Claims (5)

[Claims] A plurality of fire detectors for monitoring a fire extinguishing area;
And a water discharge nozzle provided for each of the fire detectors, wherein each of the fire detectors has a plurality of fields of view having different monitoring distances, and has detected a fire. A fire extinguishing system comprising: a selection control device that selects a water discharge nozzle corresponding to the fire detector that has detected a fire in a field of view closer to a monitoring distance among the plurality of fire detectors. 2. A plurality of fire detectors for monitoring a fire extinguishing area,
A fire extinguishing system comprising: a water discharge nozzle provided in correspondence with each of the fire detectors; wherein each of the fire detectors has a middle and near field of view and a long field of view monitoring field; When there is the fire detector that has detected a fire in a distance view and the fire detector that has detected a fire in a far view, it has a selection control device that selects a water discharge nozzle corresponding to the former fire detector. Fire extinguishing equipment. 3. A plurality of fire detectors for monitoring a fire extinguishing area,
A water discharge nozzle provided corresponding to each of the fire detectors,
A fire extinguishing system comprising: a fire detector having a middle-near field of view and a long-range field of view, wherein each of the fire detectors has a medium-near field of view and a long field of view; When there is a fire detector that detects a fire, select the water discharge nozzle corresponding to the former fire detector, and when each of the fire detectors detects a fire in the same distance field of view, the fire is detected first. A fire extinguishing system comprising a selection control device for selecting a water discharge nozzle corresponding to the fire detector. 4. The fire detector according to claim 1, wherein said fire detector is an infrared sensor having a plurality of pyroelectric elements.
Or the fire extinguisher described in 3. 5. A plurality of fire detectors for monitoring a fire extinguishing area,
A water discharge nozzle provided for each of the fire detectors, and a method for selecting a water discharge nozzle of a fire extinguishing facility comprising: dividing the field of view of each of the fire detectors into a plurality of fields of view having different monitoring distances; A method for selecting a water discharge nozzle of a fire extinguishing facility, wherein a water discharge nozzle corresponding to the fire detector that has detected a fire is selected from a plurality of fire detectors that have detected a fire in a field of view closer to a monitoring distance.