KR890000844B1 - Automatic fire prevention with infrared ray responsive type fire detector - Google Patents

Abstract

he fire extinguisher has the detector receiving infrared rays from the flames of a fire in a detecting area at one of an array of light receiving elements which corresponds to the ray's incident angle into an assembly of an infrared ray passing filter and a condenser lens. Variations in the detected output of the detector resulting from flaring of the fire flames are discriminated. When the output of the fire detector is higher than a predetermined level, an extinguishant tank communicating with the ejection nozzle is opened to discharge towards the flames the extinguishant from the tank.

Description

Automatic fire extinguishing device equipped with infrared light detector type fire detector

1 is a schematic diagram showing an automatic fire extinguishing device equipped with an infrared light-receiving type fire detector.

2 is a partially enlarged side view of the automatic fire extinguishing device of FIG.

3 is an explanatory diagram of a detection area obtained by the fire detector of the automatic fire extinguishing device of FIG.

4 is a block circuit diagram showing an embodiment of a means for processing an output signal of a fire detector in the automatic fire extinguishing device of FIG.

FIG. 5A is a waveform diagram of an output signal appearing at each light receiving element of a light receiving array provided to the signal processing means of FIG.

5B is a waveform diagram of an output signal in the waveform shaping circuit of the signal processing means of FIG.

6 is a detailed circuit diagram of the circuit of FIG.

* Explanation of symbols for main parts of the drawings

10 unit 11 housing

12: fire detector 13: extinguishing agent nozzle

15: infrared transmission filter 16: condenser lens

19: light receiving array 21: nozzle drive motor

33: tank 35: actuator

The present invention relates to an automatic fire extinguishing device, and more particularly, to equip a fire extinguish jet nozzle to extinguish a fire extinguishant ejection nozzle automatically at a ignition point. It relates to an automatic fire extinguishing device.

This type of automatic fire extinguishing device has a fire detector and a fire extinguishing device installed on the ceiling of a building, so when the fire detector detects a fire, the fire extinguishing tank is opened to eject a fire extinguishing agent from the nozzle of the fire extinguishing system to the fire You can.

A representative embodiment of a conventional automatic fire extinguishing device is a so-called sprinkler system that operates in conjunction with each or both of a smoke detector or a heat detector. In this case, a plurality of sprinklers are installed on the ceiling surface so that the smoke or heat detector sends a detection signal. As soon as an open room is sprayed with a large amount of fire extinguishing liquid in all directions. However, such a system requires a large area of unnecessary absorption and requires installation of several sprinklers on the ceiling surface and at the same time a large amount of water pipes and actuators, which is expensive and poor in appearance. There was this.

In order to solve the above problem, the present inventors have already proposed an automatic fire extinguisher as Japanese Patent No. 1,035,605, which receives a plurality of light receiving elements and a plurality of light receiving elements depending on the place where the flames are generated by receiving infrared rays from the flame when a fire occurs. Infrared light-type fire detectors, including infrared transmissive filters and condenser lens assemblies that serve to receive light in one of them, communicate with the extinguishing tank and move along the X- and Y-axes to eject the extinguishing agent when the tank is opened And means for directing the spray nozzle to the place of fire, and means for receiving the output from the fire detector and opening the extinguishing tank.

Therefore, in the event of a fire in the room, the infrared rays passing through the infrared transmission lens receive light to one light receiving element via the condenser lens, whereby the position signal of the location of the fire is directed toward the ignition place; It is given to the means for opening the tank to control the direction of ejection nozzles toward the ignition place and at the same time the extinguishing tank is opened so that the extinguishing operation is automatically performed. The fire extinguisher of this Japanese patent can extinguish as a single extinguishing agent ejecting device and has the advantage of being simple in configuration and greatly reducing the cost of the facility, but in case of fire other than flames, for example, sunlight and electric light ) Or even infrared rays from various heat sources, resulting in a malfunction of the device.

The main object of the present invention is to maintain a concise and inexpensive configuration, and to distinguish infrared rays from flames and infrared rays from sunlight or various heat sources other than flames, and to distinguish between small and large flames to prevent malfunction and to improve reliability. It is to provide an automatic fire extinguishing device that is remarkably improved.

In the present invention, the fire detector is installed in such an infrared transmission filter condenser lens assembly so that infrared rays can be incident on one of the plurality of light receiving elements according to the angle of incidence of the infrared rays, and the extinguishing agent ejection nozzles are detected by the detection output from the fire detector. If the fire extinguishing direction is controlled toward the flame and the detection output from the fire detector is equal to or greater than a predetermined value, the extinguishing tank communicating with the nozzle is opened to open the fire extinguishing agent from the tank toward the flame. It is realized by providing a means for processing the detection output signal as a means for variously discriminating according to the unique size.

Other objects and advantages of the present invention will become apparent from the following detailed description in accordance with the embodiments shown in the accompanying drawings.

The invention according to the embodiments shown in the drawings will now be described, but it is to be understood that the invention is not limited to the particular embodiments shown, but includes various design variations which are possible within the scope of the appended claims. .

1 to 3, a single housing 11 having a detector, a spray unit 10, a fire detector 12, and a fire extinguishing jet nozzle installed in a horizontal and horizontal direction are provided in the automatic fire extinguishing device of the present invention. 13) There is. The fire detector 12 has an opening 14 at the bottom, and the opening 14 includes an infrared transmission filter 15, a condenser lens 16, and a frame 17 for supporting the filter and the lens around the circumference. Assembly 18 is mounted. In the fire detector 12, a light receiving array 19 including a plurality of light receiving elements arranged in a line is provided, and the light receiving array 19 filters infrared rays incident on the condenser lens 16 according to the angle of incidence of the infrared rays. Each light receiving element is arranged to be incident on this one light receiving element via (15). In this configuration, the detection area DA is set not only in the positional relationship between the condenser lens 16 and the light receiving array 19 but also in accordance with the detection capability of the light receiving element in the array 19.

The extinguishing agent jet nozzle 13 of the unit 10 is constituted by a nozzle body 20 rotatably received in the housing 11 and fixed to one side of the housing 11. It is connected to the output shaft of the nozzle body 20 is rotatable in a rotation angle range of at least 90 ° and can be stopped at any desired angle position within the range and the nozzle body 20 is provided with an opening 22 of the nozzle The nozzle opening 22 is opened in the housing 11 so as to open from the bottom to one side of the housing 11 over a range of 90 ° according to the rotation of the nozzle body 20 driven by the motor 21. It is possible to displace in the recess 23 provided.

On the other hand, the detection ejection unit 10 is installed on the bottom surface of the body casing 24 of the automatic fire extinguisher through the axially rotatable joint 25 located in the casing 24 so that the unit 10 is rotatable with the joint. This seam 25 is connected to the extinguishing agent supply duct 26 extending outwardly from the casing 24 to the upper end and liquid does not penetrate into the nozzle body 20 for supplying extinguishing agent to the other lower end (not shown). Connected to prevent The gear wheels 27 in the casing 24 are axially fixed to the lower end of the seam 25 or duct 26 with suitable reinforcing members, if desired, so that the gear wheels 27 drive the unit provided in the casing 24. It is engaged with the pinion 29 provided in the output shaft of the motor 28. In such a configuration, rotation of the motor 28 can cause the unit 10 to rotate 360 ° through the pinion 29 and the gear wheel 27 about an axis perpendicular to the axis of rotation of the nozzle drive motor 21.

Preferably, the main body casing 24 itself exposes the bottom surface of the casing 24 and allows the lower end of the duct 26 projecting out of the seam 25 to be operated from the bottom of the ceiling liner 30. Housed in the housing, the casing 24 is fixed at the upper partition 31 and the upper surface of the building with bolts.

The end of the extinguishing agent supply pipe 32 is connected to the supply duct 26, and the other end of the supply pipe 32 is connected to the discharge port of the extinguishing tank 33. The tank 33 is provided to be opened by an actuator 35 operated by an output signal of the signal processing means 34 which will be described later.

Accordingly, when the tank 33 is opened by the actuator 35, the extinguishing agent stored in the tank 33 under the appropriate pressure is forcibly sent to the nozzle body 20 through the supply pipe 32 and the duct 26 to open the opening 22. Is squirted out.

The extinguishing agent contained in the tank 33 may be in liquid or powder form and the term “extinguishing agent” as used herein also contains pressurized water.

Also, in the present embodiment, the extinguishing tank 33 is preferably housed in a room, and has a supply pipe 32 extending through the side wall and extending from the tank to the upper bulkhead of the room and is connected to the duct 26. If the unit 10 has the detection area DA occupying the entire space of the room, it can be understood that only a single supply pipe 32 can be easily installed as compared with the conventional sprinkler system.

In FIG. 1, the signal processing means 34 is shown outside the body casing 24, but is received in the casing 24 to receive a light signal from the light receiving array 19 of the fire detector 12 as well as the detector ( The detection output of the smoke detector installed in a proper place of the ceiling liner 30 is inputted by sending the detection output in advance of 12).

The signal processing means 34 gives an output to the actuator 35, the nozzle drive motor 21 and the unit drive mutter 28 so that the motors 21 and 28 can be directly extinguished in their desired direction at their relative positions. The nozzle body 20 and the detection and ejection unit 10 are controlled to rotate about the separation axis.

The configuration of the signal processing means 34 will now be described with reference to FIGS. 4 to 6.

Processing means (34) are light-receiving elements (19 _1, 19 _2, ...... 19 _n) wave shaping hoeroe (波整型回路), each processing a detection output of the light receiving elements constituting the light receiving array 19 (40 _1, 40 ₂ ,... 40 _n ). The waveform circuit 40 serves to provide an output of a rectangular pulse when the detection output of the light receiving element is greater than or equal to a predetermined value. In this case, the flame has an intrinsic property so that the intensity of the infrared light is changed in one light receiving element in the light receiving array 19, in other words, the amount of light incident on each light receiving element can be changed.

If the amount of infrared light incident on the light-receiving element is very small, for example, as shown in Fig. 5a (a), but if the corresponding waveform 40 has no output as shown in Fig. 5b (a), However, it is not detected when such a flame emitting infrared rays is very small, such as a stove or the like, because the total amount of infrared rays incident on the light receiving element is too small.

The pulse outputs of each of the circuits 40 ₁ to 40 _n are supplied to one of the corresponding counters 41 ₁ to 40 _n and the pair of outputs of two adjacent adjacents of the circuits 40 ₁ to 40 _n are as the two inputs of an AND circuit as described AND circuit is supplied to each of the (42 ₁ to 42 _{n 1).} When the number of output pulses from any one of the determination type circuits reaches the set value, the predetermined counters 41 ₁ to 41 _n send an output to the first OR circuit 43 to supply power to the nozzle drive motor 21. The output of either of the AND circuits 42 ₁ to 42 _n-1 1 is sent to the memory 44 and the second OR circuit 44.

That is, the memory 44 stores a signal indicated by two adjacent light receiving elements and indicating a flash point, and sends an output to a contact unit 46 having a contact that matches the number of AND circuits. The movable contact of the contact unit 46 is provided on the outer circumferential surface of the nozzle body 20 rotated by the motor 21, and when the movable member contacts one of the fixed contacts corresponding to one of the AND circuits provided with the output, The memory 44 sends an output signal to the motor 21 to stop the motor, and the memory also sends the output signal to the solenoid 47 contained in the operator 35 of the fire extinguishing tank 37, whereby The solenoid 47 is supplied with power to the output of the power supply circuit 48.

The second OR circuit 45 which receives the outputs of the AND circuits 42 ₁ to 42 _n-1 sends an output to the pulse generator 49 to which one of its outputs is supplied to the counters 41 ₁ to 41 _n . Determine. That is, the set value is the counting time of each counter. This makes it possible to count the number of output pulses of the shaping circuit during the set time of the counter.

There is no output in the crystal circuits 40 ₁ to 40 _n even when the reflected sunlight is reflected on any one of the light receiving elements and strong infrared rays are applied. In other words, the output of the shaping circuit will have a very large amplitude so that it cannot be counted at the counter and the counter will not emit any output, whereby other infrared-generating elements other than the flame may be excluded from detection by the flame detector. have.

The pulse generator 49 sends a pulse output to the memory 44 to erase it. In addition, another output is applied to the motor drive circuit 50 to receive the output from the AND circuit to stop the unit drive motor 28. The motor drive circuit 50 outputs the detection signal provided from the smoke detection circuit 36 or the emergency pushbutton switch 51 which is manually operated by the person who finds the fire before the fire is detected by the detector 36. Power the motor in response to the signal.

The operation of the automatic fire extinguishing device according to the present invention will be described in detail. If a fire occurs in the detection area DA shown in FIG. 3, the detector 36 detects it and sends a signal to the motor drive circuit 50 to supply power to the unit drive motor 28.

As a result, the detection ejection unit 10 is rotated to direct the fire detector 12 to the firing point, that is, the point where the infrared ray from the firing point is incident on the light-receiving array 19 made of a single light receiving element. when rotation is to occur from the small flame of a stove or did not occur in the detection signal from the light receiving element with respect to infrared rays of a level generated from such as the sun light wave shaping circuit (40 ₁ to 40 _n) and counters (41 ₁ To _n )).

As the size of the ignited flame increases, the frequency of the output wave detected by the light-receiving element gradually increases as shown in FIGS. 5A (b) to 5A (n), and the number of output pulses of the wave shaped circuit also increases. Infrared rays will be generated and emitted to two adjacent light receiving elements of the light receiving array 19, causing the output signal to be generated in one of the AND circuits corresponding to these two light receiving elements, which are generated via a second OR circuit. In response to the output of the pulse generator 49, the motor drive circuit 50 will stop the unit drive circuit 28, and the fire detector 12 is located here and includes an injection nozzle 13 The concave portion 23 is directed to the point of ignition.

The output of the AND circuit is applied to the memory 44 as a signal indicating the firing point, and the nozzle body 20 is rotated in response to this signal, and the movable contact of the contact unit 46 is a fixed contact corresponding to a specific AND circuit. When in contact with one of the nozzle body 20 will be stopped at an angle to the nozzle opening 22 toward the firing point. The solenoid 17 of the operator 35 for the extinguishing rank 33 is then powered, and a extinguishing agent is injected from the nozzle opening 22 towards the flame to extinguish the flame.

In this embodiment, the unit 10 can rotate 360 ° around the vertical axis X, which is the rotation axis of the unit drive motor 28, and the rotation range of the fire detector 12 is equal to the range of the nozzle opening 22. Even when set sufficiently the same, the fire detector 12 can detect a fire occurring at any position of the detection area DA. Furthermore, the nozzle body 20 may rotate at least 90 ° around the horizontal axis Y, which is the axis of rotation of the nozzle drive motor 21. As a result, the nozzle opening 22 can be directed freely along the X-axis and the Y-axis so as to spray the extinguishing agent at any position in the detection area DA.

According to the automatic fire extinguisher of the present invention, it is possible to recognize the object of the present invention, the conventional sprinkler system using a smoke or heat detector that the detector has a high sensitivity and easily malfunctions due to a rise in room temperature smoke, etc. In contrast to the case, the fire detector 12 can detect even a slightly larger flame than a flame such as a stove, that is, the present invention makes it possible to detect a fire occurrence at an early stage, and the smoke detector has a sufficiently high sensitivity. If so, digestion will be as effective as possible.

In the present invention, the increase in the sensitivity of the detector only increases the number of times the detection ejection unit 10 rotates through the unit driving motor 28, and the fire detector operates only after detecting a flame generating infrared rays above a predetermined level. Because of this, malfunction can be effectively prevented.

The present invention can be modified in various ways. For example, similarly to the operating range of the nozzle body 22 of the nozzle opening 22 and the nozzle body 13 which are 90 degrees enough, instead of such a detection range of the light receiving array of the fire detector 12, this range is set to 180 degrees, respectively. Could be.

Moreover, although the light receiving elements of the array of fire detectors 12 have been described as being aligned in a row, they may be staggered from one another and arranged in multiple rows.

The smoke detector 36 may be replaced by a heat detector, or a detector that detects smoke and heat at the same time may be used. Instead of a smoke detector, it may further have an infrared detector having a filter lens assembly such as that of the fire detector 12 and having a plurality of quenching elements disposed over the entire area inside the detector.

In addition, the detection ejection unit 10 may be rotated at all times to make other detectors unnecessary, and in this case, the detection range of the light receiving array 19 may be preferably 180 °.

Claims (8)

A fire detector, a fire extinguishing tank, and a blowout connected to the tank, comprising a plurality of light-receiving elements and an assembly of infrared transmission filters and a condenser lens for storing infrared light in one of the light-receiving elements corresponding to the projection angle of the infrared light. A nozzle means, signal processing means responsive to the detected position output of said fire detector for determining a change in intensity of the output due to the ignited flame, and said signal processing means for directing said injection nozzle means toward said ignition point; Means for responding to one output, and means for responding to a second output of said signal processing means for opening said tank. 2. The apparatus of claim 1, further comprising: means connected to said light-receiving element for generating a spherical pulse as said first output when said detected position output exceeds a predetermined level, and counting the number of said pulses provided for a predetermined time. And said judging means of said signal processing means composed of means connected to said pulse generating means and providing a second output when the counted pulse number reaches a predetermined value. The light emitting device of claim 2, wherein the light receiving elements of the fire detector are arranged in a line to form a light receiving array, and the pulse generating means of the signal processing means comprises a plurality of wave shaped circuits connected to each of the light receiving elements. The counting means of the signal processing means is composed of a plurality of counters each connected to each of the well-formed circuits, and the signal processing means each receives an output from two of the well-formed circuits corresponding to two adjacent elements of the light receiving element. And a pulse generator for receiving a plurality of AND circuits and outputs of the AND circuit and generating an output for setting the predetermined counting time. 4. The nozzle of claim 3, wherein the ejection nozzle means comprises a casing capable of diffraction with respect to a vertical axis, and a nozzle member embedded in the casing and capable of rotating about a horizontal axis, wherein the directing means drives the nozzle member in a horizontal direction. And a second motor configured to drive the casing around the vertical axis by supplying power to the first motor and a predetermined input, wherein the first and second motors are stopped by the output of the AND circuit. Fire extinguisher. 5. The fire extinguisher according to claim 4, wherein said predetermined input for supplying power to said second motor is an output from a smoke detector. 6. The apparatus of claim 5, wherein the output of the smoke detector is supplied to the second circuit through the output of a motor driving circuit, and the output of the AND circuit is supplied to a second motor through the pulse generator and the motor driving circuit. Fire extinguisher, characterized in that. 5. The fire extinguisher according to claim 4, wherein said output of said AND circuit for stopping said first motor is supplied there through a contact unit for opening and closing a contact in response to said rotation of a memory and said nozzle member. 8. The device of claim 7, wherein the means for opening the tank includes a solenoid operated with the contact unit such that power is supplied when the output of the AND circuit is applied to the first motor through the contact unit. Fire extinguisher.

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