JP2019145099A - Fire detection system - Google Patents

Abstract

To provide a fire detection system capable of detecting a fire disaster at an early stage in a large space with a large ceiling height.SOLUTION: In a large space 2, smoke detectors with a height direction plate, 30-4 to 3-12, are provided at a certain position in a height direction in a region below a ceiling part in a space as a monitoring target. In a case where housing sections S-1 to S-3 such as rack shelves are formed in the monitoring target, each of the smoke detector covers a non-housing section which is at least not a housing section such as a passage between rack shelves or a space above an upper surface of a rack shelf as a detection range.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a fire detection system.

  There is a fire detection system that detects the occurrence of a fire in a space such as a warehouse (see Patent Document 1). In such a fire detection system, a light projecting part is provided on one of the opposing wall surfaces near the ceiling, and a light receiving element is provided on the other wall surface. If it is detected that the light received by the element has been dimmed, a fire is detected.

Japanese Patent Laid-Open No. 7-182581

However, if the height of the space to be monitored from the floor surface to the ceiling surface is high to some extent, or if a fire occurs near the floor surface, the heat generated by the fire is It is necessary to reach a temperature above a certain level and the time until the movable piece operates is prolonged. In addition, in summer, etc., because the roof of the warehouse is heated, the room temperature near the ceiling rises, so it is not possible to determine whether the temperature has risen due to a fire or just a rise in room temperature. It is difficult to identify whether or not.
On the other hand, in the case of a smoldering fire, if smoke reaches the vicinity of the ceiling, the fire can be detected. However, as mentioned above, the room temperature near the ceiling rises due to the roof of the warehouse being heated in the summer, etc., so that the room temperature near the ceiling is higher than the air in the lower layer part, so that Air circulation is hindered and a so-called boundary layer is formed. When the air temperature in this boundary layer becomes higher than the air temperature generated by firewood fire, etc., smoke from the fire stays in the lower part of the boundary layer, so it will not rise to the ceiling and is installed on the ceiling It becomes difficult to detect smoke with the smoke detector.

  The present invention has been made in view of such circumstances, and its purpose is to detect smoke drifting in the boundary layer in a space with a high height from the floor surface to the ceiling surface (hereinafter referred to as a large space). It is to provide a fire detection system that can.

  In order to solve the above-described problem, in one embodiment of the present invention, a smoke detector is provided at any position in the height direction in a region below the ceiling of the space to be monitored, and the smoke detector is When the storage area is formed in the monitoring target, at least a non-storage area that is not the storage area is set as a detection range.

  In the fire detection system of one embodiment of the present invention, the smoke detector is a spot-type smoke detector, and the spot-type smoke detector is provided so that the inner surface is on the floor side. It is provided so as to be accommodated on the inner surface of the smoke collecting plate.

  In the fire detection system of one embodiment of the present invention, a plurality of the smoke detectors are provided at different positions in the height direction.

  In the fire detection system of one embodiment of the present invention, the smoke detector is a suction type smoke detector, and the suction type smoke detector sucks air in different regions in the height direction. A plurality of suction pipes are provided, and smoke in each of the different regions in the height direction is detected by switching the air sucked by the plurality of suction pipes.

  In the fire detection system of one embodiment of the present invention, the suction type smoke detector detects a smoke concentration equal to or higher than a predetermined smoke threshold in the air sucked by the first suction pipe among the plurality of suction pipes. In this case, the number of suction tubes to be switched is a region that includes the first suction tube, and is switched to a number smaller than the total number of the plurality of suction tubes, whereby the first suction tube sucks, Detect smoke in a narrower area than the entire monitored area.

  In the fire detection system of one embodiment of the present invention, the smoke detector is a suction type smoke sensor, and the suction type smoke detector has a plurality of openings for sucking air in different areas. And detecting smoke in each of the different areas by monitoring the air sucked by each of the plurality of openings.

  Moreover, in the fire detection system of one embodiment of the present invention, the smoke detector is installed such that different areas on the plane are to be detected.

  In the fire detection system according to an embodiment of the present invention, the smoke detector is a detection target in areas along different directions on a plane, and at least a part of the detection target area. And a management device that identifies a place where smoke is detected on the plane based on the detection result of each of the smoke detectors.

  Moreover, in the fire detection system of one embodiment of the present invention, a hollow frame forming a storage compartment of a shelf provided in a space to be monitored, the suction pipe through which the sucked air flows, and the suction pipe And a smoke sensing body for detecting the presence or absence of smoke contained in the sucked air.

  In the fire detection system according to an embodiment of the present invention, the smoke detection body includes a suction unit that sucks air around the opening via the suction pipe, and light that is sucked by the suction unit. A light emitting element that irradiates light, a light receiving element that receives scattered light scattered by particles contained in air sucked by the suction unit, and a scattered light received by the light receiving element An integration unit that integrates the amount of light for a predetermined time, and a determination unit that determines a particle concentration of particles contained in the sucked gas based on an integration value obtained by the integration unit.

  In the fire detection system of one embodiment of the present invention, the smoke detection main body further includes a lens for condensing the light irradiated by the light emitting element onto a specific area of the air sucked by the suction unit. The fire detection system according to claim 10.

  Moreover, in the fire detection system of one embodiment of the present invention, a plurality of the suction pipes are provided, and a set of switching valves provided on the suction pipe with the opening interposed therebetween, and a monitoring section in the space are shown. A monitoring zone information acquisition unit that acquires monitoring zone information, and a switching valve control unit that controls the switching valve based on the monitoring zone information are further provided.

  Further, in the fire detection system according to an embodiment of the present invention, the shelf board is supported by two beams installed at an interval, and from one beam to the other beam in the arrangement direction of the two beams. A shelf plate whose lower surface is inclined so as to go upward as it goes is further provided.

  In the fire detection system of one embodiment of the present invention, the suction pipe is formed by hollowing at least the other of the two beams, and the opening is formed of the suction pipe. , Formed at a portion facing the one beam.

  As described above, according to the present invention, smoke drifting in the boundary layer in a large space can be detected.

It is a perspective view of large space 2 where fire detection system 1 of a 1st embodiment is applied. It is the top view and side view of large space 2 to which the fire detection system 1 of 1st Embodiment is applied. It is a side view of smoke detector 30 with a smoke collector plate to which fire detection system 1A of a 2nd embodiment is applied, and a top view of large space 2. It is a side view of large space 2 where fire detection system 1A of a 2nd embodiment is applied. It is a side view of large space 2 where fire detection system 1B of a 3rd embodiment is applied. It is a side view of large space 2 where fire detection system 1C in modification 1 of a 3rd embodiment is applied. It is a top view of the large space 2 where the fire detection system 1D in the modification 2 of 3rd Embodiment is applied. It is a side view of the large space 2 to which the fire detection system 1E in 4th Embodiment is applied. It is a top view of the large space 2 where the fire detection system 1E in 4th Embodiment is applied. It is the sectional view on the AA line of the large space 2 shown in FIG. It is a block diagram which shows the structural example of the smoke detection main body 5 in 4th Embodiment. It is a block diagram which shows the structural example of the smoke detection part 52 in 4th Embodiment. It is a figure which shows the structural example of the information memorize | stored in the scattering characteristic information storage part 525 in 4th Embodiment. It is a block diagram which shows the structural example of the control apparatus 6 in 4th Embodiment. It is a sequence chart which shows the operation example of the fire detection system 1E in 4th Embodiment.

  Hereinafter, a fire detection system according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
First, the first embodiment will be described.
FIG. 1 is a perspective view of a large space 2 to which the fire detection system 1 of the first embodiment is applied.
The large space 2 is a space having a higher ceiling than a space having a ceiling height assumed by a conventional residence, such as a gymnasium, a warehouse, a theater, an exhibition hall, or the like (hereinafter referred to as a conventional space). The large space 2 may be a space having a high ceiling and does not necessarily have to have a large area in the plane direction. For example, the large space 2 may be an entrance hall of a condominium where the upper floor and the lower floor are connected, an entrance of a detached house having a colonnade, a living room, or the like.

  The large space 2 has a higher ceiling than the conventional space. For this reason, a fire detector (not shown) that is obliged to be installed in a space having a ceiling height equal to or higher than a predetermined ceiling height (for example, 20 m) is a ceiling surface of the large space 2 or a position close to the ceiling surface. Installed. Such a fire detector, which has been obligated to be installed, can detect flames and smoke at a ceiling surface of the large space 2 and at a predetermined position near the ceiling surface. In the following description, an area in which flames and smoke can be detected by a fire detector that has conventionally been required to be installed is referred to as a “ceiling part”. The ceiling part is, for example, an area from the ceiling surface in FIG. Further, the ceiling portion is, for example, a region from the ceiling surface to a position that is at least 80% of the ceiling height.

In the large space 2, the distance from the floor surface to the ceiling is larger than the ceiling height in the conventional space. For this reason, when smoke and heat are generated near the floor surface of the large space 2, a flow in which the smoke and thermal air flow rises, and a plume having a trumpet-shaped outer boundary with the surrounding air is generated. . The time until the smoke in the generated plume rises and reaches the ceiling portion takes a longer time in the large space 2 with the ceiling height than in the conventional space. The fire gradually expands with time, and the plume has the property of increasing in thickness as the fire expands. In other words, in the large space 2, when the smoke in the plume generated near the floor surface is detected by the fire detector provided on the ceiling, the fire exceeds the initial stage where it is relatively easy to extinguish. May grow greatly. If the fire has grown greatly when smoke in the plume is detected by the fire detector, it may not be possible to extinguish even if a sprinkler (not shown) installed on the ceiling is operated.
Further, in the large space 2, since the distance from the floor surface to the ceiling is large, a temperature difference is likely to occur in the height direction, and a layer (boundary layer) having a different temperature is formed between the floor surface and the ceiling. Air circulation may be hindered at the interface of different layers. In such a case, it is assumed that the plume generated near the floor surface of the large space 2 is prevented from rising at the boundary surface, and the plume does not reach the ceiling. In such a case, it is difficult to detect a flame or the like with a conventional fire detector provided on the ceiling. In the fire detection system 1 of the present embodiment, smoke detection is performed in a region below the ceiling of the large space 2, that is, in a region where it is difficult to detect flames or smoke with a fire detector that is required to be installed in the past. Make it possible.

  As shown in FIG. 1, in the large space 2 of the embodiment, the smoke detector 10 is provided at any position in the height direction below the ceiling. Hereinafter, in this embodiment, the case where the smoke detector 10 is a dimmable smoke detector will be described as an example. However, the present invention is not limited to this, and the smoke detector 10 is a so-called spot type smoke detector. It may be a suction type smoke detector. The spot type smoke detector and the suction type smoke detector will be described in detail in other embodiments.

  Although FIG. 1 illustrates the case where a storage compartment such as a rack shelf is not provided, the storage compartment may be provided in the large space 2. In this case, the smoke detector 10 uses a non-accommodating section that is not an accommodating section, such as a passage between the rack shelves and the rack shelf, or a space above the upper surface of the rack shelf as a detection range.

The dimming smoke detector 10 detects smoke. As shown in FIG. 1, a light projecting unit 11 and a light receiving unit 12 are provided. For example, the dimming smoke detector 10 detects smoke by installing the light projecting unit 11 and the light receiving unit 12 so as to be separated from each other by a predetermined distance. In the example of FIG. 1, in the large space 2, the light projecting unit 11 is installed on the left wall surface, and the light receiving unit 12 is installed on the right wall surface.
The light projecting unit 11 emits a monitoring light beam toward the light receiving unit 12. The light receiving unit receives the monitoring light beam emitted from the light projecting unit 11. The monitoring light beam irradiated by the light projecting unit 11 reaches the light receiving unit 12 without being dimmed as long as there is no smoke. However, the monitoring light beam irradiated by the light projecting unit 11 is dimmed in a state where smoke is present on the optical axis of the monitoring light beam compared to a state where there is no smoke. The dimming smoke detector 10 measures the amount of monitoring light that has reached the light receiving unit 12 and determines the presence or absence of smoke based on the measurement result. The dimming smoke detector 10 determines that there is smoke, for example, when the amount of the monitoring light beam reaching the light receiving unit 12 is less than a predetermined threshold.

FIG. 2 is a plan view and a side view of the large space 2 to which the fire detection system 1 of the first embodiment is applied. FIG. 2A is a plan view of the large space 2, and FIG. 2B is a side view of the large space 2.
As shown in FIG. 2A, a plurality of light projecting units 11 (light projecting units 11-1 to 11-7) are provided on the left wall surface of the large space 2, and a plurality of light receiving units 12 (light receiving unit 12) are disposed on the right wall surface. -1 to 12-7) are provided, and the light projecting unit 11 and the light receiving unit 12 that form a pair constitute a light-reducing smoke detector 10 (smoke detectors 10-1 to 10-N). ing. (However, N is an integer of 1-7). Each of the light projecting units 11 is provided, for example, at the same position in the z-axis direction, at a position separated from each other by a distance E in the y-axis direction, and installed so as to irradiate the monitoring light beam in parallel with the x-axis direction. Thereby, each of the dimming smoke detectors 10 is a region including a plane that is the distance in the longitudinal direction of the large space 2 in the axial direction and the distance E in the y-axis direction, and does not overlap each other. Detect smoke in each. That is, in the fire detection system 1 of the embodiment, the areas different from each other on the plane are installed as detection targets. This makes it possible to detect smoke in different areas in the plane direction.

  Here, the interval (distance E in FIG. 2A) at which the dimming smoke detector 10 is arranged is, for example, about the same as the diameter of the plume in the initial state where it can be extinguished relatively easily It may be less than that. According to experiments, the diameter of the plume in the initial state that can be extinguished relatively easily is about 4 m. Since the dimming smoke detectors 10 are arranged at intervals of 4 m or less, even when a plume is generated in the large space 2, the generated plume can be detected in the initial state. .

As shown in FIG. 2B, in the large space 2, a plurality of dimming smoke detectors 10 are installed at different positions in the height direction. In FIG. 2 (b), a plurality of dimming smoke detectors 10 (dimming smoke detectors 10-7 and 10-8) are arranged in a predetermined direction in the height direction (z-axis direction) of the large space 2. The example installed with the distance of the distance F is shown. Thereby, each of the dimming smoke detectors 10 can detect smoke in different areas in the height direction in the large space 2. The interval (distance F in FIG. 2 (b)) at which the dimming smoke detector 10 is disposed is that the smoke generated by the fire near the floor surface is formed by the boundary layer formed in the large space 2. It may be determined in consideration of the possibility that it will not rise to. For example, the dimming smoke detectors 10 are installed in the large space 2 so as to be separated from each other by about 10 m in the height direction.
The distance in the height direction of the boundary layer (layer thickness) varies depending on the structure and use of the building forming the large space 2 and the surrounding environment and season. For example, in a factory or warehouse where the roof portion is a member that is thinner than a general residential building, the temperature of the roof portion increases due to the irradiation of sunlight in the summer, and therefore the thickness of the boundary layer increases. On the other hand, in a hotel or the like in which a heat insulating member is used for a roof or the like, the boundary layer becomes thin because a temperature difference hardly occurs in the height direction in the space.
It is desirable to provide a dimmable smoke detector 10, for example, in the vicinity of an interface between layers having different temperatures formed in the large space 2. Considering that the thickness of the boundary layer varies depending on the season, the position of the boundary surface of the layer with different temperature when the boundary layer is the thinnest, and the position of the boundary surface of the layer with different temperature when the boundary layer is the thickest It is desirable to provide a dimming smoke detector 10 in the vicinity of each. That is, the distance F may be determined by the variation in the thickness of the boundary layer that occurs in the large space 2.

  In the above description, the interval at which the dimming smoke detector 10 is arranged in the planar direction is not limited to the diameter of the plume in the initial state. Further, the interval at which the dimming smoke detector 10 is arranged in the height direction is not limited to the distance that the plume rises in the initial stage. The interval at which the dimming smoke detector 10 is disposed may be arbitrarily determined according to the area in the plane direction of the large space 2, the shape thereof, the shelves and fixtures installed in the large space 2, and the like.

  In the fire detection system 1, for example, the dimming smoke detector 10 is provided so that the optical axis direction of the monitoring light beam is along the longitudinal direction of the large space 2. Thus, the same number of dimming smoke detectors 10 are installed so that the distance to which the monitoring light beam is irradiated is longer than when the monitoring light beam is installed in the short direction. And smoke can be detected over a wider area. Further, in the fire detection system 1, a dimming smoke detector 10 is installed so that the monitoring beam is not blocked by the shield. For example, when the large space 2 is a warehouse or the like where shelves or the like are installed, it is conceivable that the monitoring beam is blocked by a shelf board or luggage. In such a case, the area where there is a line-of-sight or a line-of-sight where a shelf for storing luggage is not provided is set as the detection range of the dimming smoke detector 10.

As described above, in the fire detection system 1 of the first embodiment, the dimming smoke detector 10 is provided at any position in the height direction in the region below the ceiling of the large space 2.
A fire detector installed on a conventional ceiling is used when a boundary layer is formed by the rise in room temperature near the ceiling and air circulation in the height direction is hindered so that smoke does not rise up to the ceiling and drifts in the air. Can not detect smoke. Even in this case, in the fire detection system 1 of the first embodiment, since the light-reducing smoke detector 10 is provided below the ceiling portion of the large space 2, such a smoke drifting in the hollow is detected. can do. Thereby, it is possible to detect smoke drifting in the boundary layer, which is difficult to detect with a conventional fire detector.
Further, in the fire detection system 1 of the first embodiment, even if a fire occurs near the floor surface, before the smoke rises from the floor surface to the ceiling, a reduction provided below the ceiling portion. Smoke can be detected by the optical smoke detector 10, and fire can be detected at an early stage.

Further, in the fire detection system 1 of the first embodiment, a plurality of dimming smoke detectors 10 may be provided at different positions in the height direction. Thereby, in the fire detection system 1 of 1st Embodiment, even if it is a case where the position of the boundary layer formed by the raise of the room temperature near the ceiling differs according to the temperature rise condition of the day, the said boundary layer Smoke drifting can be detected.
Moreover, in the fire detection system 1 of 1st Embodiment, you may install so that a different area | region may become a detection target on a plane. As a result, if a plurality of dimming smoke detectors 10 are installed at intervals of about the diameter of the plume in the initial state of the fire, smoke can be detected in the initial state where the fire can be extinguished relatively easily. Can detect fire early.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS.
The fire detection system 1A of the second embodiment is different from the first embodiment in that the smoke detector 10A is a spot type smoke detector. In the fire detection system 1A of the second embodiment, for example, the large space 2 is a rack warehouse including a plurality of shelves 3 (see FIG. 3B). In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.
FIG. 3 is a side view of the smoke detector 30 with the smoke collecting plate of the second embodiment and a plan view of the large space 2 to which the fire detection system 1A is applied. 3A is a schematic cross-sectional view seen from the side of the smoke detector 30 with the smoke collecting plate, and FIG. 3B is a plan view of the large space 2 to which the fire detection system 1A is applied.
FIG. 4 shows a side view of the large space 2 to which the fire detection system 1A of the second embodiment is applied.

As shown to Fig.3 (a), in 2nd Embodiment, the smoke sensor 30 with a smoke collection board is provided. The smoke detector 30 with the smoke collecting plate is an example of a spot type smoke detector, and includes, for example, a spot type smoke detector 10 </ b> A and a smoke collecting plate 20.
The smoke detector 10A includes, for example, a light emitting unit and a light receiving unit that are provided separately from each other inside the smoke detector 10A. In the spot type smoke detector 10A, the light receiving unit is provided at a position different from the optical axis direction of the monitoring light beam emitted from the light emitting unit. For this reason, the light receiving unit does not receive the monitoring light beam emitted from the light emitting unit in a normal state without smoke, but receives the monitoring light beam irregularly reflected by smoke when smoke enters the inside of the smoke detector 10A. . The smoke detector 10A determines the presence or absence of smoke by measuring the amount of monitoring light that has reached the light receiving unit. The smoke detector 10A determines that there is smoke, for example, when the amount of the monitoring light beam reaching the light receiving unit is equal to or greater than a predetermined threshold.

As shown in FIG. 3A, the smoke collecting plate 20 is a dome-shaped smoke collecting plate, for example. The smoke collecting plate 20 is provided such that its inner side surface is on the floor side of the large space 2. A smoke detector 10A is provided inside the smoke collecting plate 20 and in the center of the surface viewed from the plane.
By providing the smoke detector 10A at the center of the smoke collecting plate 20, when smoke rising from the floor surface reaches the smoke collecting plate 20, the smoke collects from the peripheral edge side of the inner periphery of the smoke collecting plate 20 to the central side. And reaches the inside of the smoke detector 10A. This makes it easier to detect smoke in a wider range in the plane direction than when a smoke detector without the smoke collecting plate 20 is used.

  As shown in FIG. 3B, in the fire detection system 1A, a plurality of shelves 3 (shelf 3-1, 3-2) are installed. Each of the shelves 3 is installed at a predetermined distance G so that the front of the shelves are parallel to the x-axis direction, and a space M between the shelves 3-1 and the shelves 3-2 is provided. It is formed. Each shelf 3 is provided with a smoke detector 30 with a smoke collector so as to project the outer periphery of the smoke collector 20 into the space M. In the example of FIG. 3B, smoke detectors 30-1 to 30-3 with smoke collectors are provided on the shelf 3-1, and smoke detectors 30-4 to 30-6 with smoke collectors are provided on the shelf 3-2. Each is provided.

The smoke detector 30 with the smoke collecting plate is installed on the lower surface side of the shelf plate of the shelf 3, for example, and detects smoke on the lower side of the shelf plate and below the shelf plate in the space M. For example, in a rack warehouse, smoke generated on the floor is blocked by luggage and shelves, and is prevented from rising and drifting on the lower surface of the shelves, or smoke blocked from rising by the boundary layer of the space M is a hollow shelf. However, the smoke detector 30 with the smoke collecting plate is provided on the lower surface side of the shelf so that the outer peripheral portion of the smoke collecting plate 20 protrudes into the space M. The smoke below the smoke detector 30 with smoke plate can be detected.
Further, in a rack warehouse, the shelf board may function as a shelf board by being formed by a bar-like member instead of a plate-like member. In this case, a net-like, linear or truss-like skeleton structure is formed in parallel to the surface on which the load is placed. In such a case, smoke is not blocked by the shelf, but when a load is placed on the shelf, it is conceivable that the smoke is blocked by the load. Even in such a case, by providing the smoke detector 30 with the smoke collecting plate on the lower surface side of the shelf board, it is possible to detect smoke drifting on the lower surface of the luggage.

  As shown in FIG. 4, the shelf 3-3 may be provided with a plurality of shelf boards in the height direction. In this case, in the fire detection system 1A of the embodiment, a plurality of smoke detectors 30 with smoke collecting plates are provided in the storage sections S (storage sections S-1 to S-3) divided in the height direction by shelf boards. Provided. In the example of FIG. 4, smoke detectors 30-4 to 30-6 with smoke collecting plates are provided at the second highest position in the storage section S-1 provided at the highest position of the shelf 3-3. Smoke detectors 30-7 to 30-9 with smoke collectors are provided in the storage compartment S-2, and smoke detectors 30-10 to 30- with smoke collectors are provided in the storage compartment S-3 provided at the lowest position. 12 are provided. By installing one or a plurality of smoke detectors 30 with a smoke collecting plate for each storage section S, it is possible to detect smoke in the entire storage section S.

  In FIG. 4, for each of the storage compartments S, one collection is provided between each of the two pillars H (for example, between the pillars H-1 and H-2 and between the pillars H-2 and H-3). Although the example in which the smoke detector 30 with the smoke plate is installed is shown, the plurality of pillars H (the pillars H-1 to H-4) provided on the shelf 3-3 are pillars that support the shelf board, The housing section S is not partitioned by a surface parallel to the side surface of the housing section S.

  In the embodiment described above, the case where the large space 2 is formed by installing the shelves 3 in the rack warehouse has been described as an example. However, the present invention is not limited to this, and the large space 2 may be a hotel or a shopping building. It may be a space formed by being surrounded by a plurality of floors, such as a blow-off formed in a wall. Even in such a building such as a hotel, the smoke collecting plate 20 is provided so that the outer peripheral portion of the smoke collecting plate 20 protrudes from each floor to the blow-off portion, so that the smoke drifting in the hollow of the large space 2 can be detected, and the fire Early detection can be realized.

  As described above, in the fire detection system 1A of the second embodiment, the smoke detector 10A is a spot-type smoke detector, and the inner surface of the spot-type smoke detector 10A is on the floor side. It is provided so as to be accommodated on the inner surface of the dome-shaped smoke collecting plate 20 provided as described above. Thereby, in the fire detection system 1A of the second embodiment, the smoke detector 10A can collect the smoke that has reached the smoke collector plate 20 and can detect it, and the smoke detector without the smoke collector plate 20 is used. It is possible to detect smoke in a wider range in the plane direction than in the case.

  In the second embodiment described above, the case where the smoke collecting plate 20 has a dome shape has been described as an example. However, the present invention is not limited to this. The smoke collecting plate 20 may be any shape as long as it does not hinder the loading and unloading of the luggage placed on the shelf 3, and may be, for example, a conical shape or a pyramid shape. Other shapes may be used.

(Third embodiment)
The fire detection system 1B of the third embodiment is different from the above-described embodiment in that the smoke detector 10B is a suction type smoke detector. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted.
FIG. 5 is a side view of the large space 2 to which the fire detection system 1B of the third embodiment is applied.
As shown in FIG. 5, in the fire detection system 1 </ b> B of the third embodiment, the smoke detector 10 </ b> B is disposed near the floor surface of the large space 2, for example. The smoke detector 10B includes a main pipe 13, a switching valve 14, and a plurality of suction pipes 15 (suction pipes 15-1 to 15-6).
The switching valve 14 is provided in the vicinity of the ceiling portion of the large space 2, for example. The smoke detector 10 </ b> B is connected to the connection portion on one side of the switching valve 14 via the main pipe 13. A plurality of suction pipes 15 are connected to a connection portion on the other side of the switching valve 14.
Each of the suction pipes 15 is disposed so as to extend in the horizontal direction (x-axis direction) along the ceiling to the vicinity of the position on each plane of the area for sucking smoke in the large space 2, and The suction pipe is disposed so as to extend to the floor surface side in the height direction (z-axis direction). The tip of the suction pipe 15 is disposed at the height of the area for sucking smoke, and an opening is formed. As described above, the plurality of suction pipes 15 are arranged so that openings are provided in different areas in the height direction or horizontal direction of the space to be monitored.

  In addition, as shown in FIG. 5, when the shelf 3 is provided in the large space 2 and a plurality of storage compartments S (storage compartments S-1 to S-3) are provided in the height direction, an arbitrary height direction is provided. You may make it provide the opening part of the suction pipe 15 in the lower surface side of the position or the shelf of each step of the shelf 3. Thereby, it becomes possible to suck the smoke in the region of any one of the accommodating sections S in the height direction through the opening of the corresponding suction tube 15. In some cases, a plate-like member is not used for the shelf plate, and the shelf plate is formed by arranging rod-like members in parallel. In such a case, each of the suction pipes 15 may be arranged so that an opening is provided on the upper surface side of the storage section S of the shelf 3.

  Moreover, you may make it provide the opening part of the some suction tube 15 for every storage division S which differs in a height direction. In FIG. 5, the openings of the suction pipes 15-1 and 15-4 are accommodated in the accommodating section S- 1, the openings of the suction tubes 15-2 and 15-5 are disposed in the accommodating section S- 2, and the accommodating section S- 3 shows an example in which the openings of the suction tubes 15-3 and 15-6 are provided. By providing the opening of the suction pipe 15 in the storage section S, it becomes possible to detect smoke in each of the storage sections S.

  In FIG. 5, a plurality of pillars H (pillars H-1 to H-6) are provided in each of the accommodating sections S, as in FIG. 4, but each of the pillars H is not a plate-like member. The housing section S is not partitioned into a plurality of sections by a plane parallel to the side surface of the housing section S.

  The suction type smoke sensor 10B has an intake fan inside, and the air sucked from the vicinity of the opening of each suction pipe 15 is sucked into the smoke sensor 10B by the intake fan. Introduce. Thereby, the smoke detector 10B detects smoke for each region in the large space 2.

The smoke detector 10B controls the switching valve 14 to switch the suction pipe 15 to be sucked at predetermined time intervals or at specific timing, and sequentially detects the air sucked from each suction pipe 15 as smoke. Introduced inside the vessel 10B. As a result, smoke can be selectively detected with the region near the opening of the selected suction tube 15 in the large space 2 as a detection target.
Further, the smoke detector 10B identifies which suction pipe 15 has been selected based on the switching instruction, thereby recognizing in which area in the large space 2 smoke is detected or not detected. be able to.

  The smoke detector 10B may instruct the switching valve 14 to switch the suction pipe 15 at predetermined time intervals (for example, every 5 seconds), for example. For example, when the total distance of the suction tube 15 and the main tube 13 from the opening of the suction tube 15 to the smoke detector 10B is about 100 m, the time until the air near the opening reaches the smoke detector 10B is It is about several tens of seconds (about 20 to 30 seconds). As described above, the smoke detector 10B can reliably introduce the air in the vicinity of the opening into the smoke detector 10B by switching the switching valve 14 based on the distance between the suction pipe 15 and the main pipe 13. It becomes possible to detect smoke more accurately.

  The smoke detector 10B controls the switching valve 14 when the smoke from a certain suction pipe 15 shows a value equal to or higher than a predetermined smoke concentration, and sucks smoke with a value higher than the predetermined smoke concentration. The smoke detection may be performed only for the smoke from the suction tube 15 and the surrounding suction tube 15. By detecting smoke only in areas where a fire is suspected, the accuracy of fire detection can be improved and the alarm time can be shortened.

Alternatively, the large space 2 (monitoring area) may be divided into a plurality of sections, and a smoke detector 10B may be assigned to each of the divided sections, and monitoring may be performed by the plurality of smoke detectors 10B. When the number of suction pipes 15 to be switched by one smoke detector 10B increases, it takes time to sequentially switch all the suction pipes 15 and determine the presence or absence of smoke. Although it may be possible that the fire may not be detected at an early stage due to an increase in the interval, the large space 2 is divided into a plurality of areas as described above, and the entire building is monitored by a plurality of smoke detectors 10B. Each of the pipes 15 can be confirmed in a short cycle, and a fire can be detected at an early stage.
The monitoring area may be divided in the height direction (vertical direction), may be divided in the plane direction (lateral direction), or may be divided in the height direction and the horizontal direction.

  As described above, in the fire detection system 1B of the third embodiment, the suction type smoke detector 10B includes the plurality of suction pipes 15 having the openings for sucking air in different regions, and includes a plurality of suction pipes. By switching the air sucked by the tube 15, smoke in each of the different areas is detected. Thereby, in the fire detection system 1B of 3rd Embodiment, the smoke which generate | occur | produced in each of the different area | regions in the large space 2 can be detected.

(Modification 1 of 3rd Embodiment)
Modification 1 of the third embodiment is different from the above-described third embodiment in that a plurality of openings are provided in one suction tube 15.
FIG. 6 is a side view of the large space 2 to which the fire detection system 1C according to the first modification of the third embodiment is applied.

  As shown in FIG. 6, in the present modification, one suction tube 15 is provided in each of the different regions in the height direction along the planar direction. That is, the suction section 15-1 has a suction tube 15-1, the storage section S-2 has a suction tube 15-2, and the storage section S-3 has a suction tube 15-3 along the x-axis direction. Provided. Each suction pipe 15 is provided with a plurality of openings 150 to 154 so that air around each opening can be sucked. For example, in the suction pipe 15-1, the opening 150 is in the vicinity between the pillars H-1 and H-2 in the accommodation section S-1, and the opening 151 is the pillars H-2 and H- in the accommodation section S-1. 3, the opening 152 is in the vicinity between the pillars H-3 and H-4 in the housing section S-1, and the opening 153 is in the pillars H-4 and H-5 in the housing section S-1. And the opening 154 can suck air in each of the vicinity between the columns H-5 and H-6 in the accommodation section S-1. Thus, if one suction pipe 15 is provided in the storage section S, the entire storage section S can be monitored, and the system is simplified compared to the case where a plurality of suction pipes 15 are provided in the storage section S. It becomes possible to do.

  In the above description, the case where each suction tube 15 is provided along the x-axis direction in the planar direction (lateral direction) has been described as an example. However, the suction tube 15 may be provided along the y-axis direction. In this case, it is possible to monitor the respective areas of the accommodating sections S-1 to S-3 where the suction pipes 15 are different in the height direction.

Further, the suction tube 15 may be provided along the z-axis direction which is the height direction (vertical direction). For example, when the suction tube 15 is provided along the height direction in the region between the columns H-1 and H-2, the suction tube 15 is disposed in the region between the columns H-1 and H-2. The space from the storage section S-1 to the storage section S-3 can be monitored.
In addition, a plurality of suction pipes 15 having a plurality of openings as described in this modification may be provided in the planar direction (or height direction).
As described above, in the first modification of the third embodiment, by providing a plurality of openings in the suction tube 15, the number of suction tubes 15 is smaller than in the case where a plurality of openings is not provided. It becomes possible to monitor a wider area.

(Modification 2 of the third embodiment)
The second modification of the third embodiment is different from the third embodiment described above in that the suction pipe 15 is provided so that the monitoring areas of the plurality of suction smoke detectors 10B intersect each other.
FIG. 7 is a plan view of the large space 2 to which the fire detection system 1D according to the second modification of the third embodiment is applied.

  As shown in FIG. 7, in the fire detection system 1D of the present modification, a plurality of smoke detectors 10B (smoke detectors 10B-1, 10B-4, and 10B-5) are connected to each other, and the suction pipes 15 are connected to the x-axis. Are provided at intervals. In addition, a plurality of smoke detectors 10B (smoke detectors 10B-6 to 10B-9) are provided with the suction pipes 15 spaced apart from each other along the y-axis. That is, in the fire detection system 1D of the present modification, a plurality of smoke detectors 10B are provided so that their monitoring areas intersect each other.

In the present modification, a management device 100 that manages each of the smoke detectors 10B is provided.
The management apparatus 100 acquires the detection result from each of the smoke detectors 10B. The management device 100 identifies a location where smoke is detected based on the acquired detection result. For example, when the smoke is detected from both the smoke detector 10B-4 and the smoke detector 10B-7, the management apparatus 100 monitors the areas of the smoke detector 10B-4 and the smoke detector 10B-7. It is determined that smoke has been detected at a location where the crosses, that is, the region K.
In the second modification of the third embodiment, since the location where the smoke is detected by the management device 100 can be specified, it is possible to perform fire extinguishing activities more reliably and early with respect to the fire that has occurred.

  In the above-described modification, the case where the monitoring region of the smoke detector 10B is provided along the x-axis direction or the y-axis direction has been described as an example. However, the present invention is not limited to this, and at least smoke detection It is only necessary that the monitoring areas of the container 10B are provided along different directions.

In the third embodiment described above, the suction tube 15 may have a cylindrical shape, or may have a polygonal cross section (including triangles, squares, and other polygons).
In the third embodiment described above, the case where the suction tube 15 has a substantially straight cylindrical shape has been described as an example, but the suction tube 15 may have a bent portion. In this case, for example, the suction pipe 15 may be arranged in a loop shape so as to surround the inside of the outer peripheral portion in the plane of the large space 2, or provided with a large number of bent portions so as to be S-shaped or crank-shaped. It may be stretched and piped.
Further, the suction pipe 15 may be branched. One suction pipe 15 may be branched into a tree shape like a tournament table, and an opening may be provided at each branch destination.

(Fourth embodiment)
Next, a fourth embodiment will be described. In this embodiment, the fire detection system 1 is different from the above-described embodiment in that a shelf frame provided in the large space 2 is used as a suction pipe in suction-type smoke detection.

  A large space 2 to which the fire detection system 1E according to the fourth embodiment is applied will be described with reference to FIGS. FIG. 8 is a side view of the large space 2. FIG. 9 is a plan view of the large space 2. 10 is a cross-sectional view taken along line AA of the large space 2 shown in FIG. In this embodiment, the X-axis direction in FIGS. 8 to 19 is the left-right direction, the Y-axis direction is the depth direction, and the Z-axis direction is the height direction.

As shown in FIG. 8, the fire detection system 1E includes, for example, a large space 2, a shelf 4 provided in the large space 2, a smoke detection body 5, and a control device 6.
The large space 2 is a so-called rack warehouse provided with a shelf 4 (rack).
The shelf 4 is a shelf including a plurality of storage compartments (the compartment (circle A) to the compartment (circle F) in FIG. 8) for storing the luggage carried into the large space 2.
The smoke detection body 5 detects the presence or absence of smoke (smoke density) contained in the sucked air.
The control apparatus 6 controls the switching part 43 mentioned later, and detects the smoke in a specific division.

  The shelf 4 is provided so that the longitudinal direction of the shelf 4 is along the left-right direction of the large space 2, for example. A plurality of shelves 4 may be provided in the large space 2.

The shelf 4 includes, for example, a suction pipe 41 (suction pipes 41-1 to 41-6), an opening 42 (openings 42-1 to 42-6), and a switching unit 43 (switching units 43-1 to 43-). 9) and a shelf board T (shelf boards T-1 to T6).
In the present embodiment, the frame (frame) of the shelf 4 is configured by a hollow member, and functions as a suction pipe through which air sucked inside flows. That is, the columns of the shelf 4 standing in the height direction function as the suction pipes 41-1 to 41-3, and the beams arranged in the lateral direction function as the suction pipes 41-4 to 41-6.
The suction pipes 41-1 to 41-6 may be independent pipes, or all or part of the suction pipes 41-1 to 41-6 may be unitized.

A through hole is formed in the suction tube 41, and an opening 42 is provided in the through hole.
A plurality of openings 42 may be provided at different positions in the height direction and horizontal direction (lateral direction and depth direction) of the shelf 4, or only one opening 42 may be provided in the shelf 4.
In the present embodiment, in the suction pipe 41-4 arranged in the horizontal direction, the openings 42-1 and 42-4 are provided at positions different from each other, and are arranged in the horizontal direction at a height different from that of the suction pipe 41-4. In the suction tube 41-5, openings 42-2 and 42-5 are provided at different positions. Further, in the suction pipe 41-6 disposed in the lateral direction at a height different from that of the suction pipes 41-4 and 41-5, openings 42-3 and 42-6 are provided at different positions.

The opening 42 may be formed in the suction tube 41 in the height direction as well as the suction tube 41 in the left-right direction. One opening 42 may be formed in the suction tube 41, or a plurality of openings 42 may be formed. When a plurality of openings 42 are formed in the suction tube 41, they may be formed uniformly with a predetermined interval, or may be formed at unequal intervals. In this case, the number of the openings 42 formed in the suction pipe 41 may be arbitrarily determined according to the suction capability, the sensitivity of detecting smoke, the size of the accommodation section S, or the like.
The direction of the opening of the opening 42 may be any direction, but is a direction that suppresses inclusion of particles other than smoke (such as dust) contained in the air in the sucked air. Is desirable. For example, the opening of the opening 42 is preferably in a direction other than upward in the height direction (Z-axis positive direction). That is, it is desirable that the horizontal direction, the depth direction, or the height direction be downward (Z-axis negative direction).

  The switching unit 43 is provided in the suction pipe 41 with the opening 42 interposed therebetween, and is opened or closed under the control of the control device 60. By opening at least one of the switching portions 43 on both sides of the opening 42, the air around the opening 42 can be sucked into the suction pipe 41.

A plurality of switching units 43 may be provided at different positions in the height direction and horizontal direction of the shelf 4, or only one switching unit 43 may be provided on the shelf 4.
In the present embodiment, in the suction pipe 41-1 erected in the height direction from the floor surface, switching units 43-1 to 43-3 are provided at different heights, and the suction pipe 41-1 is in the lateral direction. In the suction pipe 41-2 erected at different positions, switching portions 43-4 to 43-6 are provided at different heights. Further, in the suction pipe 41-3 erected at a position different from the suction pipes 41-1 and 41-2, switching portions 43-7 to 43-9 are provided at different heights.

As shown in FIG. 9, the shelf 4 is provided with a frame (frame) including columns H (columns H-1 and H-3) and beams R in the depth direction of the suction pipe 41.
Here, the frame provided in the depth direction is not used as the suction tube. However, the frame in the depth direction may be used as the suction tube in the same manner as the front frame.
As shown in FIG. 9, the shelf board T is provided between the front side frame and the back side frame in the horizontal direction (left and right direction and depth direction).
As shown in FIG. 10, the shelf board T is formed so that an upper surface may follow a horizontal direction (direction of xy plane), for example. Further, the shelf plate T is upward (z-axis positive) from the beam R toward the suction pipe 41-4 in the direction from the depth side to the near side (direction from the y-axis positive side to the y-axis negative side). (In the direction). In this case, the suction pipe 41-4 is provided at an end portion on the side where the back surface of the shelf plate T is inclined upward, that is, an end portion on the positive side of the z axis of the shelf plate T. Moreover, the opening part 42-1 is formed in the site | part which opposes the beam R in the suction pipe 41-4. Similarly, the opening 42-4 is formed at a portion facing the beam R in the suction pipe 41-4.
Thereby, the back side of the shelf board T functions as a smoke collecting board. That is, the smoke rising from the bottom side of the shelf board T is collected from the depth side to the near side and reaches the periphery of the opening 42, and the smoke is detected as compared with the case where the back side of the shelf board T is not inclined. It becomes easy to do.

FIG. 11 is a block diagram illustrating a configuration example of the smoke sensing body 5 according to the fourth embodiment. The smoke detection main body 5 includes, for example, a suction unit 51, a smoke detection unit 52, a communication unit 53, and a display unit 54.
The suction unit 51 sucks air around the section provided with the opening 42 via the suction pipe 41 and supplies the sucked air to the smoke detection unit 52.
The smoke detector 52 detects the presence or absence of smoke (smoke concentration) in the air supplied by the suction unit 51.
The communication unit 53 communicates with the control device 6. The communication unit 53 transmits the result sensed by the smoke sensing unit 52 to the control device 6.

  The display unit 54 displays a signal corresponding to the detection result by the smoke detection unit 52. The display by the display unit 54 is a display according to the smoke density of the detected smoke. For example, when the smoke density is any one of an alarm level, a warning level, and a caution level, the display is provided at a location where the level is displayed. The level is displayed by turning on a light emitting diode (LED).

  Further, the display unit 54 may display whether or not the power is turned on and various error displays. The various types of error displays are, for example, displays for notifying a decrease in suction force in the smoke sensing body 5, a foreign object being sucked into the suction pipe 41, and the like. Thereby, it is possible to notify the user who operates the smoke sensing body 5 about various errors in the smoke sensing body 5.

  The display unit 54 may display the change in smoke density in real time. This display is, for example, a display showing the smoke density by a bar graph, and a display showing an increase or decrease of the smoke density by an increase or decrease of the length of the bar graph. Thereby, the change of the detected smoke density can be easily recognized by the user.

  Note that the communication unit 53 may transmit the content displayed by the display unit 54 described above to the control device 6.

Further, the display unit 54 may display the contents of control by the control device 6 in the smoke sensing body 5. For example, the display unit 54 may display the switching status of the suction tube 41 and the switching unit 43.
Specifically, the display unit 54 displays a layout diagram showing the layout of the suction tubes 41. And the display part 54 displays the suction pipe 41 used as the smoke suction path in a different color from the suction pipe 41 that does not serve as the smoke suction path according to the switching state of the switching unit 43.
In addition, the display unit 54 displays a side view and a plan view showing the storage compartment. Then, the display unit 54 displays a section that sucks smoke (area that performs smoke detection) in a color different from a section that does not suck smoke (section that does not detect smoke) according to the switching state of the switching unit 43. .
Moreover, the display part 54 may display whether smoke notification was made | formed. The smoke notification is information transmitted (reported) to the receiver when the smoke density exceeds a certain threshold. The smoke notification is received from, for example, a transmitter (not shown) provided in the large space 2 by the receiver, and is notified to the smoke detection main body 5 via the control device 6.

  Further, the display unit 54 may switch and display the above-described displays by a predetermined operation. In this case, for example, the smoke sensing body 5 includes an input unit (not shown) including operation buttons and the like. The operation buttons of the input unit are provided corresponding to each display. The display unit 54 acquires operation information indicating that the operation button has been pressed from the input unit, and switches the display according to the acquired operation information.

FIG. 12 is a diagram illustrating a configuration example of the smoke sensing unit 52 according to the fourth embodiment.
The smoke detection unit 52 includes, for example, a light emitting element 520, a light receiving element 521, a light amount conversion unit 522, an integration unit 523, a determination unit 524, and a scattering characteristic information storage unit 525.

  The light emitting element 520 is arranged to irradiate light at a predetermined irradiation angle with respect to the traveling direction of sucked air (hereinafter also simply referred to as air). The light emitting element 520 irradiates a predetermined region P in a space where air flows with light having a predetermined wavelength. A lens may be provided between the light emitting element 520 and the region P. The lens collects light in the region P. Thereby, the light quantity of the light irradiated to the area | region P can be enlarged, and the light quantity of the scattered light mentioned later can be enlarged.

  The light receiving element 521 is disposed at a position where the light from the light emitting element 520 is not directly received. In the present embodiment, the light receiving element 521 is arranged to receive light from a direction along the air flow direction. That is, the light receiving element 551 receives the scattered light scattered at the scattering angle θ among the light scattered by the smoke contained in the air in the region P from the light irradiated by the light emitting element 520.

The light quantity conversion unit 522 converts the light quantity of light received by the light receiving element 551 into a voltage signal. The light quantity conversion unit 522 includes, for example, a photoelectric element that outputs a voltage signal proportional to the light quantity, and outputs a signal obtained by converting the light quantity into a voltage to the integration unit 523.
The integration unit 523 integrates the voltage signal corresponding to the light amount from the light amount conversion unit 522 by adding in a predetermined time interval (for example, several tens of seconds). The predetermined time interval used for this integration may be arbitrarily determined according to the suction ability of the smoke sensing body 5 and the sensitivity for detecting smoke. The integration unit 523 outputs the integrated value obtained by the integration to the determination unit 524.

The scattering characteristic information storage unit 525 stores information in which the integrated value and the smoke density are associated with each other.
FIG. 13 is a diagram illustrating a configuration example of the scattering characteristic information storage unit 525 of the fourth embodiment.
The scattering characteristic information storage unit 525 has items of, for example, an integral value, a smoke density, and a sensing level. The integral value indicates an integral value obtained by integrating the light amount received by the light amount conversion unit 522 (a voltage value obtained by converting the light amount into a voltage) in a predetermined time interval. The smoke density indicates the smoke density corresponding to the integrated value. The relationship between the smoke density and the integrated value is defined by, for example, deriving in advance an integrated value when air having a known smoke density is sucked. As the detection level, a level corresponding to the smoke density is indicated by, for example, three levels of a caution level, a warning level, and a warning level. Here, smoke levels of 1% or more and less than 3% are warning levels, and smoke levels of 3% or more and less than 7% are warning levels. A smoke concentration of 7% or more indicates an alarm level.

  The determination unit 524 refers to the scattering characteristic information storage unit 525 based on the integrated value from the integration unit 523. The determination unit 524 determines the smoke density corresponding to the integration value from the integration unit 523 based on the smoke density associated with the integration value. For example, when the integration value from the integration unit 523 is M1 or more and less than M2, the determination unit 524 determines that the smoke density is 1% or more and less than 3%.

Alternatively, the determination unit 524 interpolates (for example, linear interpolation) between M1 and M2, so that the smoke density according to the integration value from the integration unit 523 is between 1% and 3%. May be determined.
The determination unit 524 outputs the acquired smoke density to the communication unit 53 and the display unit 54.

  FIG. 14 is a block diagram illustrating a configuration example of the control device 6 according to the fourth embodiment. The control device 6 includes, for example, a monitoring section information acquisition unit 61, a specifying unit 62, a switching valve control unit 63, a sensing result acquisition unit 64, a fire information communication unit 65, a control unit 66, and a monitoring section information storage. Part 67.

  The monitoring section information acquisition unit 61 acquires information indicating a section (monitoring section) to be monitored on the shelf 4. The section to be monitored is a storage section in the shelf 4 and is, for example, any one of the section (circle A) to the section (circle F). For example, the monitoring section information acquisition unit 61 acquires information indicating the monitoring section by referring to the monitoring section stored in the monitoring section information storage unit 67 in advance. Or you may make it the monitoring division information acquisition part 61 acquire the information which shows the monitoring division input by input operation, such as a receiver, the manager of a warehouse, or a guard.

The specifying unit 62 specifies the switching unit 43 to be opened or closed based on the information indicating the monitoring section acquired by the monitoring section information acquiring unit 61.
First, the specifying unit 62 specifies the opening 42 corresponding to the monitoring section based on the information indicating the monitoring section. For example, when the section (circle A) is a monitoring section, the opening 42-4 is specified as the opening 42 corresponding to the monitoring section.
Next, the specifying unit 62 determines each control of the switching units 43-1 to 43-9 for sucking air around the opening 42 corresponding to the monitoring section. For example, when it is determined that the air around the opening 42-4 is sucked, the specifying unit 62 determines to close the switching units 43-1 to 43-6. Further, when the specifying unit 62 opens the switching unit 43-7, opens the switching unit 43-8 in the height direction, and opens the switching unit 43-9 from the switching unit 43-8 to the smoke sensing body 5. judge.

  Note that when the air in the monitoring section is sucked, the suction force required for the sucked air to reach the smoke sensing body 5 from the opening 42 increases as the distance that the sucked air flows through the suction pipe 41 becomes longer. growing. For this reason, it is preferable that the specifying unit 62 controls the switching unit 43 so that the distance of the suction pipe 41 that passes through the opening 42 to reach the smoke sensing body 5 is the shortest.

  Further, when another opening 42 is provided in the suction pipe 41 that passes from the opening 42 until reaching the smoke sensing body 5, air is also sucked from the other opening 42. As a countermeasure, the opening 42 may be an openable / closable part, and the specifying part 62 may control the opening / closing of the open / close part.

  Further, the smoke sensing body 5 may be provided for each suction pipe 41 in the left-right direction or the height direction of the shelf 4. For example, the smoke sensing body 5 may be provided in each of the suction pipes 41-4, 41-5, and 41-6. In this case, the specifying unit 62 does not need to perform complicated processing in order to make the distance of the suction pipe 41 through the opening 42 to reach the smoke sensing body 5 the shortest, so that the switching unit 43 It is possible to simplify the switching control.

  In addition, when a plurality of smoke detection bodies 5 are provided in this way, alarm signals and signals indicating smoke density as detection results may be transferred to each other.

The switching valve control unit 63 controls the opening or closing of the switching valve of the switching unit 43 based on the determination of the specifying unit 62.
Communication of a signal for controlling the opening or closing of the switching valve between the switching valve control unit 63 and the switching unit 43 is wireless communication using a short-range wireless communication network such as infrared rays or Bluetooth (registered trademark). Alternatively, wired communication via a control line wired using the hollow portion of the suction pipe 41 may be used.

The detection result acquisition unit 64 acquires a detection result from the smoke detection main body 5. The detection result acquisition unit 64 outputs the detection result to the fire information communication unit 65.
The fire information communication unit 65 transmits information in which the detection result acquired by the detection result acquisition unit 64 is associated with information indicating the monitoring section to the receiver. The fire information communication unit 65 may transmit information indicating the content displayed on the display unit 54 of the smoke sensing body 5 to the receiver.

  The control unit 66 comprehensively controls the control device 6. For example, the control unit 66 causes the specifying unit 62 to output information indicating the monitoring section acquired by the monitoring section information acquiring unit 61. The control unit 66 causes the switching valve control unit 63 to output information indicating the control of the switching unit 43 specified by the specifying unit 62.

  The monitoring section information storage unit 67 stores information related to the monitoring section. The information regarding the monitoring section may include information indicating the section to be monitored, information indicating the order of monitoring for a plurality of monitoring sections, and the like.

FIG. 15 is a sequence chart illustrating an operation example of the fire detection system 1E according to the fourth embodiment.
First, the control device 6 acquires monitoring section information indicating a monitoring section by the monitoring section information acquisition unit 61 (step S1).
Next, the control device 6 uses the specifying unit 62 to specify a monitoring section based on the monitoring section information (step S2). The specifying unit 62 specifies the opening 42 of the section that sucks air based on the monitoring section information, and determines the control of the switching unit 43 for supplying the air sucked from the specified opening 42 to the smoke sensing body 5. To do.
Next, the control device 6 controls the switching unit 43 based on the switching valve control unit 63 based on the determination of the opening or closing of the switching valve by the specifying unit 62 (step S3).
And the control apparatus 6 transmits the command which detects smoke to the smoke detection main body 5 (step S4).

When receiving the command for detecting smoke from the control device 6, the smoke sensing body 5 performs suction by the suction unit 51 (step S5).
Next, the smoke sensing body 5 receives the scattered light when the air sucked by the light receiving element 521 of the smoke sensing unit 52 is irradiated with light (step S6).
Next, the smoke sensing body 5 integrates the amount of light received by the integrating unit 523 in a predetermined time interval (step S7).
Next, the smoke detection main body 5 determines the smoke density from the integrated value by the determination unit 524 (step S8).
Then, the smoke detection main body 5 transmits the determined smoke density to the control device 6 (step S9).

The control device 6 receives the smoke density from the smoke sensing body 5 (step S10), and transmits information in which the received smoke density is associated with the monitoring section to the receiver (step S11). In step S11, the control device 6 may transmit information indicating the content displayed on the display unit 54 of the smoke sensing body 5 to the receiver.
After executing the process shown in step S11, the control device 6 returns to step S2 and continues the process of monitoring the partition to be monitored.
Alternatively, the control device 6 may return to step S2 after performing the process of determining whether or not it is necessary to change the monitored section after executing step S11. When changing the section to be monitored, the control device 6 identifies the monitoring area after the change in step S2. The control device 6 may return to step S4 when the monitored section is not changed.
The control device 6 determines, for example, whether it is necessary to change the section to be monitored according to the smoke density received from the smoke sensing body 5. For example, the control device 6 determines that the section to be monitored is not changed when the smoke density indicates a density at which the generation of smoke is suspected. As a result, it is possible to detect at an early stage whether the subsequent return, that is, whether the smoke grows or whether the smoke disappears and is no longer sensed.

  As described above, the fire detection system 1E according to the fourth embodiment is a hollow frame that forms a storage compartment of a shelf provided in the large space 2, and includes a suction pipe 41 through which the sucked air flows. And an opening 42 provided in the suction pipe 41 and a smoke sensing body 5 for detecting the presence or absence of smoke contained in the sucked air. As a result, the fire detection system 1E according to the fourth embodiment has the same effect as the above-described effect, and uses the rack frame as a suction tube, thereby requiring labor and cost of piping the suction tube to the shelf. In addition, by providing a suction pipe separately, it is possible to detect smoke without narrowing the space of the accommodation section.

  Further, in the fire detection system 1E according to the fourth embodiment, the smoke detection main body 5 includes the suction part 51 that sucks air around the opening 42 through the suction pipe 41, and the air sucked by the suction part 51. A light emitting element 520 that emits light, a light receiving element 521 that receives scattered light scattered by particles contained in the air sucked by the suction unit 51, and a light receiving element 521 that receives light scattered by the light emitting element 520. An integration unit 523 that integrates the amount of scattered light for a predetermined time, and a determination unit 524 that determines a particle concentration of particles contained in the sucked gas based on an integration value obtained by the integration unit 523. Thereby, in the fire detection system 1E in 4th Embodiment, smoke density can be determined using an integral value, and it exists in the presence or absence of the smoke contained in the air attracted | sucked from the opening part 42 for the predetermined time interval. Based on this, it becomes possible to detect the occurrence of a fire.

In the fire detection system 1E according to the fourth embodiment, the smoke detection unit 52 further includes a lens that collects the light emitted from the light emitting element 520 on a specific area of the air sucked by the suction unit 51. Prepare. As a result, the amount of light applied to a specific region can be increased to increase the amount of scattered light described later, and smoke can be detected with higher accuracy by increasing the amount of received light.
Further, in the fire detection system 1E according to the fourth embodiment, a plurality of suction pipes 41 are provided, a set of switching valves provided on the suction pipe 41 with an opening interposed therebetween, and a monitoring section in the large space 2 are shown. A monitoring section information acquisition unit 61 that acquires the monitoring section information and a switching valve control unit 63 that controls the switching valve based on the monitoring section information are further provided. Thereby, in the fire detection system 1E in 4th Embodiment, it becomes possible to control opening or closing of the switching valve of the switching part 43 according to a monitoring division, and it is from the opening part 42 to the smoke detection main body 5. With the distance of the suction pipe 41 being the shortest, air in a desired monitoring section can be sucked with a minimum suction force.

(Modification of the fourth embodiment)
In the above-described fourth embodiment, an example has been described in which the control device 6 transmits the information to the receiver every time the smoke density is received. However, it is not limited to this. The control device 6 may transmit information to the receiver when the smoke density received from the smoke sensing body 5 is equal to or higher than a predetermined threshold.
In this case, for example, the sensing result acquisition unit 64 of the control device 6 outputs the sensing result by the smoke sensing body 5 to the control unit 66. The control unit 66 compares the smoke concentration included in the detection result with a predetermined threshold value. The control unit 66 outputs a detection result to the fire information communication unit 65 when the smoke density is equal to or higher than a predetermined threshold according to the comparison result. The fire information communication unit 65 transmits information in which the sensing result acquired from the control unit 66 is associated with information indicating the monitoring section to the receiver.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Fire detection system, 2 ... Large space, 3 ... Shelf, 10 ... Smoke detector, 20 ... Smoke collector, 30 ... Smoke detector with smoke collector, 4 ... Shelf, 41 ... Suction pipe, 42 ... Opening , 43... Switching unit, 5... Smoke detection body, 52... Smoke detection unit, 520... Light emitting element, 521. Acquisition unit, 62 ... identification unit, 63 ... switching valve control unit

Claims (14)

A smoke detector is provided at any position in the height direction in the area below the ceiling of the space to be monitored,
The smoke detector has a detection range in which at least a non-containment section that is not the containment section is a detection range when a containment section is formed in the monitoring target. The smoke detector is a spot type smoke detector,
The fire detection system according to claim 1, wherein the spot type smoke detector is provided so as to be accommodated on an inner side surface of a smoke collecting plate provided so that an inner side surface is a floor side. The fire detection system according to claim 1, wherein a plurality of the smoke detectors are provided at different positions in the height direction. The smoke detector is a suction type smoke detector,
The suction type smoke detector is
A plurality of suction pipes for sucking air in different areas in the height direction, and detecting smoke in each of the different areas in the height direction by switching the air sucked by the plurality of suction pipes. Item 2. The fire detection system according to item 1. The suction type smoke detector is
When smoke concentration equal to or higher than a predetermined smoke threshold is detected in the air sucked by the first suction pipe among the plurality of suction pipes, the first suction pipe is included, and the number is smaller than the total number of the plurality of suction pipes. 5. The fire detection system according to claim 4, wherein the smoke detection system detects smoke in a region narrower than the entire region to be monitored, including a region sucked by the first suction tube by switching to air sucked by a plurality of suction tubes. . The smoke detector is a suction type smoke detector,
The suction type smoke detector is
The apparatus includes a suction pipe including a plurality of openings for sucking air in different areas, and detects smoke in each of the different areas by monitoring air sucked by each of the plurality of openings. The fire detection system according to claim 1, claim 4, or claim 5. The fire detection system according to any one of claims 1 to 6, wherein the smoke detector is installed such that different areas on a plane are to be detected. In the smoke detector, areas along different directions on a plane are to be detected,
In addition, it is installed so that at least a part of the area to be detected by each other overlap,
The fire detection system according to any one of claims 1 to 7, further comprising a management device that identifies a place where smoke is detected on the plane based on a detection result of each of the smoke detectors. A hollow frame forming a storage compartment of a shelf provided in a space to be monitored, a suction pipe through which the sucked air flows;
An opening provided in the suction tube;
A smoke sensing body for detecting the presence or absence of smoke contained in the aspirated air;
A fire detection system. The smoke sensing body is
A suction section for sucking air around the opening through the suction pipe;
A light emitting element that emits light to the air sucked by the suction part;
A light receiving element that receives scattered light scattered by particles contained in the air sucked by the suction unit, and the light irradiated by the light emitting element;
An integration unit for integrating the amount of scattered light received by the light receiving element for a predetermined time;
A determination unit for determining a particle concentration of particles contained in the sucked gas based on an integration value by the integration unit;
A fire detection system according to claim 9. The smoke sensing body is
A lens that focuses the light emitted by the light emitting element on a specific area of the air sucked by the suction unit;
The fire detection system according to claim 10, further comprising: A plurality of the suction pipes are provided,
A set of switching valves provided in the suction pipe with the opening interposed therebetween;
A monitoring section information acquisition unit that acquires monitoring section information indicating a monitoring section in the space;
A switching valve control unit that controls the switching valve based on the monitoring section information;
The fire detection system according to any one of claims 9 to 11, further comprising: A shelf plate supported by two beams installed at an interval, the shelf plate having a lower surface inclined upward as it goes from one beam to the other beam in the arrangement direction of the two beams , Further comprising
The fire detection system according to any one of claims 9 to 12. The suction pipe is formed by hollowing at least the other of the two beams,
The opening is formed in a portion of the suction pipe that faces the one beam.
The fire detection system according to claim 13.

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