WO2023132014A1 - Fire detection device - Google Patents

Fire detection device Download PDF

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Publication number
WO2023132014A1
WO2023132014A1 PCT/JP2022/000118 JP2022000118W WO2023132014A1 WO 2023132014 A1 WO2023132014 A1 WO 2023132014A1 JP 2022000118 W JP2022000118 W JP 2022000118W WO 2023132014 A1 WO2023132014 A1 WO 2023132014A1
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WO
WIPO (PCT)
Prior art keywords
light
reflecting
emitted
emitted light
detection
Prior art date
Application number
PCT/JP2022/000118
Other languages
French (fr)
Japanese (ja)
Inventor
佳祐 鷲頭
宏樹 増澤
Original Assignee
ホーチキ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ホーチキ株式会社 filed Critical ホーチキ株式会社
Priority to PCT/JP2022/000118 priority Critical patent/WO2023132014A1/en
Publication of WO2023132014A1 publication Critical patent/WO2023132014A1/en

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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device
    • G08B17/107—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device for detecting light-scattering due to smoke

Definitions

  • the present invention relates to a fire detection device.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a fire detection device that can appropriately process the light emitted into the detection space.
  • the fire detection device is a fire detection device for detecting fire in a monitoring area, wherein a detection target caused by the fire flows into the system.
  • a light emitting unit that emits emitted light into the detection space for detecting the detection target; and a light receiver that receives scattered light generated when the emitted light is scattered by the detection target in the detection space.
  • the detection space includes a first reflecting portion that does not reflect the emitted light toward the light receiving portion when the emitted light is irradiated, and the light receiving portion when the emitted light is irradiated.
  • a second reflecting portion that reflects the emitted light toward the second reflecting portion, the second reflecting portion being provided at a position different from the first reflecting portion, wherein the emitted light from the light emitting portion is , the first reflecting portion is directly irradiated, and the emitted light from the light emitting portion is not directly irradiated to the second reflecting portion.
  • the fire detection device is the fire detection device according to claim 1, wherein the detection space does not reflect the emitted light toward the light receiving unit when the emitted light is irradiated.
  • a third reflecting portion provided at a position different from the first reflecting portion, wherein the first reflecting portion reflects the emitted light directly emitted from the light emitting portion; , are reflected toward the third reflecting portion.
  • the fire detection device is the fire detection device according to claim 2, wherein the second reflector is provided at a position facing the light receiving part, and the first reflector and The third reflectors are provided on both sides of the second reflector.
  • the fire detection device is the fire detection device according to any one of claims 1 to 3, wherein the detection space is the irradiated light when the emitted light is irradiated. part of the emitted light is captured and not reflected to the light receiving part and the second reflecting part, and the other part of the emitted light that is irradiated is reflected while being diffused toward the second reflecting part. and a fourth reflecting section, wherein the emitted light from the light emitting section is directly irradiated to the first reflecting section and the fourth reflecting section.
  • the fire detection device when the emitted light is irradiated, the first reflecting portion that does not reflect the emitted light toward the light receiving portion, and when the emitted light is irradiated, toward the light receiving portion and a second reflecting portion that reflects the emitted light, and the emitted light from the light emitting portion is directly irradiated to the first reflecting portion, and the emitted light from the light emitting portion is not directly irradiated to the second reflecting portion. Therefore, for example, it is possible to prevent the emitted light from the light emitting unit from directly irradiating the second reflecting unit and the emitted light from irradiating the light receiving unit, so that the light emitted to the detection space can be appropriately processed. It becomes possible to For example, it is possible to prevent the light receiving unit from receiving light with a relatively large amount of light other than the scattered light generated by scattering the emitted light caused by the detection target caused by the fire, thereby improving the fire detection accuracy. It becomes possible.
  • the third reflector is provided so as not to reflect the emitted light toward the light receiver when the emitted light is irradiated, and the first reflector is directly irradiated from the light emitter.
  • the third reflecting portion By reflecting the emitted light toward the third reflecting portion, for example, it is possible to diffuse and attenuate the emitted light irradiated to the first reflecting portion, so that the amount of light other than scattered light is relatively small. It is possible to prevent the light receiving section from receiving a large amount of light.
  • the second reflector is provided at a position facing the light receiving part, and the first reflector and the third reflector are provided on both sides of the second reflector.
  • a part of the irradiated emitted light is captured and not reflected to the light receiving part and the second reflecting part, and the other part of the emitted light is captured.
  • FIG. 3 is a perspective view of a sensor; It is a front view of a sensor.
  • FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3;
  • Fig. 3 is an exploded perspective view of the sensor;
  • Fig. 3 is an exploded perspective view of the sensor;
  • FIG. 4 is a perspective view of an outer cover;
  • FIG. 4 is a perspective view of an outer cover;
  • FIG. 4 is a side view of the outer cover; It is a front view of an outer cover. It is a rear view of an outer cover.
  • It is a perspective view of an inner cover.
  • It is a perspective view of an inner cover. It is a side view of an inner cover.
  • a fire detection device is a device for detecting fire in a monitored area.
  • Monitoring area is an area to be monitored by a fire detection device. Specifically, it is a concept that indicates an indoor or outdoor area. It is a concept that indicates
  • FIG. 1 is a side view of a sensor according to this embodiment
  • FIG. 2 is a perspective view of the sensor
  • FIG. 3 is a front view of the sensor
  • FIG. 5 and 6 are exploded perspective views of the sensor.
  • the elements related to the features of the present application in the sensor 100 are illustrated and described with reference numerals, and the elements other than the described elements have the same configuration as the conventional sensor. may apply.
  • hatching of the cross section is omitted for convenience of explanation.
  • the XYZ axes in each figure are orthogonal to each other, the Z axis indicates the vertical direction (that is, the vertical direction or thickness direction in the installed state of the sensor 100), and the -Z The direction will be referred to as the front side, and the +Z direction will be referred to as the rear side. Also, the X-axis and the Y-axis are assumed to represent the horizontal direction (that is, the horizontal direction or width direction when the sensor 100 is installed). Further, in the XY plane of FIG. 3, the direction away from the center of the sensor 100 is referred to as the outer peripheral side, and the direction closer to the center is referred to as the inner side.
  • a reference line 801 in FIG. 1 is a center line that passes through the center of the sensor 100 and is parallel to the vertical direction of the drawing, and is shown for convenience of explanation. Note that reference lines in other drawings are also shown for convenience of explanation.
  • a reference line 802 in FIG. 1 is a center line that passes through the center of the detection element 700 and is parallel to the vertical direction of the drawing.
  • the reference line 803 is a line that indicates the same height position as the frontmost position of the protrusion 23 (that is, the same height position as the frontmost position of the stepped portion 231).
  • a reference line 804 in FIG. 3 is a center line that passes through the center of the sensor 100 and is parallel to the vertical direction of the drawing, and a reference line 805 is a center line that passes through the center of the sensor 100 and is parallel to the horizontal direction of the drawing. .
  • a reference line 806 in FIG. 4 is a center line that passes through the center of the light receiving section 72 and is parallel to the vertical direction of the drawing, and a reference line 807 is a center line that passes through the center of the light receiving section 72 and is parallel to the horizontal direction of the drawing.
  • a reference line 808 in FIG. 4 is a line indicating the same height position as the base portion 200, and a reference line 809 indicates the same height position as the position of the protruding portion 23 closest to the front side (that is, the highest position of the stepped portion 231). This is a line indicating the same height position as the position on the front side).
  • Reference lines 810 and 811 in FIGS. 5 and 6 are center lines passing through the center of the sensor 100 and parallel to the vertical direction of the drawing.
  • the sensor 100 is a fire detection device provided in the monitoring area, for example, a device for detecting fire in the monitoring area.
  • the sensor 100 is installed, for example, on a ceiling 900 to be installed.
  • the installation target of the sensor 100 is not limited to the ceiling 900.
  • the installation target may be a wall (not shown) of a room.
  • the case where the sensor 100 is installed on the ceiling 900) will be described as an example.
  • the senor 100 includes, for example, an outer cover 1, an inner cover 2, a smoke detector cover 3 (detection space cover), a smoke detector base 5, an insect screen 61 (FIG. 6), and a substrate. 62 , a terminal board 63 , a fitting 64 , a detection element 700 , a light emitting portion 71 and a light receiving portion 72 .
  • FIG. 7 and 8 are perspective views of the outer cover
  • FIG. 9 is a side view of the outer cover
  • FIG. 10 is a front view of the outer cover
  • FIG. 11 is a rear view of the outer cover.
  • a plurality of similar configurations for example, the connection portion 13, the opening portion 14, etc. in FIG. 9
  • reference numerals for convenience of explanation ( The same applies to other components).
  • Reference lines 812 and 814 in FIGS. 10 and 11 are center lines that pass through the center of the outer cover 1 and are parallel to the vertical direction of the drawing. is a center line passing through the center of and parallel to the horizontal direction of the drawing.
  • the outer cover 1 covers and houses the components of the sensor 100 (the inner cover 2, the smoke detector cover 3, etc.) from the front side, and forms part of the outer shape of the sensor 100. is.
  • the outer cover 1 is made of resin, for example.
  • the outer cover 1 includes, for example, a main body portion 11, a top plate portion 12, a connection portion 13, an opening portion 14, and a labyrinth portion 15 shown in FIG.
  • the body portion 11 is a portion having a substantially cylindrical shape with a predetermined diameter.
  • the top plate portion 12 is a portion provided on the front side of the main body portion 11, and is a circular plate-shaped portion having a smaller diameter than the outer circumference of the main body portion.
  • the connecting portion 13 is a portion that connects the main body portion 11 and the top plate portion 12 to each other, and as shown in FIG. be.
  • the opening 14 is an opening for allowing the hot airflow to flow into the sensor 100 and for the hot airflow to flow out from the sensor 100 .
  • the opening 14 is formed in a gap between the body portion 11 and the top plate portion 12 , and is divided into a plurality of openings 14 by a plurality of connecting portions 13 .
  • hot air flow is a concept that indicates the flow of fluid containing a detection target that occurs with a fire in the monitored area, for example, the concept that indicates the flow of relatively high-temperature fluid.
  • a “detection target” is a target to be detected by the sensor 100, specifically, a target generated by a fire in a monitoring area, for example, a concept including smoke particles generated by a fire. is.
  • the labyrinth unit 15 is a disturbance light processing unit that prevents disturbance light from entering the detection space 300 (FIG. 4). It introduces the containing fluid into the detection space 300 .
  • the labyrinth part 15 is provided outside the detection space 300 .
  • the labyrinth section 15 is provided on the opposite side of the mounting section for mounting the sensor 100 on the ceiling 900, which is the installation target, with respect to the disturbance light processing section. In addition, the disturbance light processing section and the mounting section will be described later.
  • the labyrinth part 15 includes, for example, a plurality of partition walls 151 as shown in FIG. 11 .
  • the "detection space” 300 is a space for detecting smoke particles, which are detection targets caused by a fire, and is a shielded space.
  • Disurbance light is light emitted toward the sensor 100 from the outside of the sensor 100, and is a concept that includes, for example, natural light such as sunlight, or artificial light such as lighting.
  • the partition wall 151 is fixed to the back side surface of the top plate portion 12, and protrudes from the top plate portion 12 toward the back side by a predetermined height. 152 adjacent to each other.
  • the partition wall 151 may be formed integrally with the top plate portion 12, or may be formed separately from the top plate portion 12 and fixed using an adhesive or the like. In the embodiment, they are assumed to be integrally formed.
  • the partition wall 151 is configured to stand from the upper surface (front surface) of the stepped portion 231 (see also FIG. 12 described later) of the inner cover 2. there is The partition wall 151 extends from the inside to the outside of the sensor 100, as shown in FIG.
  • the hot airflow is introduced into the detection space 300 through the gaps 152 between the partition walls 151 .
  • disturbance light is blocked by the partition wall 151 and does not enter the detection space 300 .
  • FIG. 12 and 13 are perspective views of the inner cover
  • FIG. 14 is a side view of the inner cover
  • FIG. 15 is a front view of the inner cover
  • FIG. 16 is a rear view of the inner cover.
  • a minor axis 230A in FIGS. 15 and 16 indicates the minor axis of the ellipse that is the circumferential shape of the protruding portion 23 (FIG. 15), and is a center line that passes through the center of the inner cover 2 and is parallel to the vertical direction in the drawing. also shows
  • the inner cover 2 covers and houses the components of the sensor 100 (smoke detector cover 3, etc.), and has a circular shape when viewed from the front.
  • the inner cover 2 is made of resin, for example.
  • the inner cover 2 includes, for example, a first opening 21, a second opening 22, and a protrusion 23 shown in FIG.
  • the first opening 21 is an opening for causing the hot airflow to flow into the detection space 300 and for causing the hot airflow to flow out from the detection space 300 .
  • the first opening 21 is, for example, a circular opening provided at the center of the inner cover 2 in front view, as shown in FIG. 15 .
  • the second opening 22 is an opening through which the detection element 700 is inserted.
  • the second openings 22 are, for example, rectangular openings that are elliptical in front view and are provided on both sides of the protrusion 23 on the long axis 230 of the protrusion 23. .
  • the protrusion 23 is a portion of the inner cover 2 that protrudes from the base 200 (FIGS. 12, 14, and 15) toward the front side. As shown in FIG. 15, the projecting portion 23 has, for example, an elliptical shape when viewed from the front, and includes a stepped portion 231 .
  • the stepped portion 231 is a part of the protruding portion 23 and is a portion that protrudes and rises with respect to the base portion 200 .
  • Composition - smoke detector cover 17 to 19 are perspective views of the smoke detection cover, FIG. 20 is a side view of the smoke detection cover, FIG. 21 is a front view of the smoke detection cover, and FIG. It is a rear view of a smoke section cover.
  • a reference line 816 in FIG. 21 is a center line passing through the center of the smoke detector cover 3 and parallel to the vertical direction of the drawing, and a reference line 818 is a center line orthogonal thereto.
  • Optical axis 901 indicates the optical axis of light emitting portion 71 (FIG. 28) in sensor 100 in the assembled state.
  • Optical axis 902 indicates the optical axis of receiver 72 (FIG. 28) in sensor 100 in the assembled state.
  • a reference line 817 in FIG. 22 is a center line passing through the center of the smoke detector cover 3 and parallel to the vertical direction of the drawing, and a reference line 819 is a center line orthogonal thereto.
  • the smoke detector cover 3 covers the detection space 300 (FIG. 4), the light emitting side optical element 712 (FIGS. 5 and 6), and the light receiving side optical element 722 together with the smoke detector base 5. It partitions the inside and outside of the space 300 .
  • the smoke detector cover 3 is made of resin, for example. A detailed description of the smoke detector cover 3 will be given later.
  • FIG. 23 and 24 are perspective views of the smoke detector base, FIG. 25 is a side view of the smoke detector base, FIG. 26 is a front view of the smoke detector base, and FIG. FIG. 11 is a rear view of the smoke section base;
  • the smoke detector base 5 is made of resin, for example.
  • the smoke detector base 5 has, for example, a flat plate shape as a whole, and includes a light emitting side accommodating portion 51 (FIGS. 23 and 26), a light receiving side accommodating portion 52, and an attenuation portion 53. As shown in FIG.
  • the light-emitting side housing portion 51 is a portion that houses the light-emitting side optical element 712 (FIGS. 5 and 6).
  • the light-receiving-side housing portion 52 is a portion that houses the light-receiving-side optical element 722 (FIGS. 5 and 6).
  • the attenuation unit 53 is a countermeasure against false alarms that suppresses an increase in output due to dust or condensation. , are provided in a predetermined range on the front side surface forming the inner surface of the detection space 300 in the smoke detector base 5 .
  • the damping portion 53 is formed, for example, by combining a large number of peaks and grooves.
  • the insect screen 61 of FIG. 6 is intended to prevent insects from entering the detection space 300 (FIG. 4) while allowing hot air to flow into or out of the detection space 300 (FIG. 4).
  • the insect screen 61 is, for example, a circular one provided in the first opening 21 of the inner cover 2, and has a predetermined thickness that allows hot air to flow in or out and prevents insects from entering. A plurality of small diameter holes (not shown) are provided.
  • a substrate 62 in FIGS. 5 and 6 is a circuit board on which an electric circuit including various elements, ICs, or electric wiring is mounted. As shown in FIG. 6, the substrate 62 has, for example, a light emitting element 711 and a light receiving element 721 mounted on its front surface. In addition to these elements, the substrate 62 also has a detection element 700 mounted thereon.
  • the terminal board 63 in FIGS. 5 and 6 covers the components of the sensor 100 (smoke detector cover 3, etc.) from the rear side.
  • the terminal board 63 is attached to the ceiling 900 via the fitting 64 , that is, it is an attachment portion for attaching the sensor 100 to the ceiling 900 .
  • the fitting 64 is detachable from the terminal board 63 and the mounting structure on the ceiling 900 side (for example, fitting or engagement with the fitting 64 to fix and attach the fitting 64). be installed. By using this fitting 64 , the sensor 100 including the terminal board 63 can be attached to the ceiling 900 . It should be noted that this fitting fitting 64 may be interpreted as corresponding to the "mounting portion”.
  • the sensor 100 is attached to the ceiling 900 using a mounting base that is a circular plate-shaped member having approximately the same diameter as the terminal board 63.
  • a mounting base that is a circular plate-shaped member having approximately the same diameter as the terminal board 63.
  • the mounting base corresponds to the "mounting portion”.
  • the "mounting base” is a member provided between the sensor 100 and the ceiling 900 for installing and mounting the sensor 100 on the ceiling 900, but a known configuration can be applied. Therefore, detailed description is omitted.
  • Detecting element 700 in FIGS. 5 and 6 is a heat detecting element that detects the heat of the hot air flow that occurs with the fire in the monitored area.
  • the detection element 700 can be configured using, for example, a thermistor or the like that detects a temperature corresponding to heat and outputs temperature information indicating the detected temperature.
  • the detection element 700 is mounted on the substrate 62, and a part of the detection element 700 protrudes from the front side of the inner cover 2 while being inserted into the second opening 22 of the inner cover 2 in FIG.
  • the detection element 700 does not necessarily have to be mounted, and is used as a combined smoke and heat sensor when mounted, and as a single smoke sensor when not mounted.
  • FIGS. 28 to 30 are diagrams showing the inside of the detection space. 28 to 30 show the assembled sensor 100 with the inside of the smoke detector cover 3 viewed from the front side, and the damping portion 53 of the smoke detector base 5 ( Illustrations such as FIG. 26) are omitted for convenience of explanation. 29 and 30, arrows A1 to A6 exemplify paths of emitted light emitted from the light emitting portion 71. As shown in FIG. In particular, arrows A1 to A6 exemplify paths of light emitted from the light emitting section 71 in a direction parallel to the smoke detector base 5 (that is, a direction parallel to the XY plane in FIG. 3).
  • the light emitting unit 71 in FIG. 28 is light emitting means for emitting emitted light into the detection space 300 for detecting smoke particles that are detection targets.
  • the light emitting section 71 includes, for example, a light emitting element 711 and a light emitting side optical element 712, as shown in FIGS.
  • the light emitting element 711 is a component that emits light (outgoing light), and can be configured using, for example, a light emitting diode (LED: Light Emitting Diode).
  • the light emitting element 711 is mounted on the substrate 62 .
  • the light-emitting side optical element 712 is a component that guides and emits the light emitted by the light-emitting element 711 into the detection space 300, and can be configured using a prism, for example.
  • the light emitting side optical element 712 is housed in the smoke detector cover 3 and the smoke detector base 5, for example.
  • the light-emitting side optical element 712 is configured, for example, to emit light from the light-emitting element 711 mainly in a direction parallel to the smoke detector base 5 (that is, a direction parallel to the XY plane in FIG. 3). is configured to Also, the light-emitting side optical element 712 is configured to emit emitted light toward the first reflecting portion 401 and the fourth reflecting portion 404 of FIG. 28, for example. Note that the first reflecting section 401 and the fourth reflecting section 404 will be described later.
  • the light receiving section 72 in FIG. 28 is a light receiving means for receiving scattered light or the like generated by the emitted light being scattered by the smoke particles to be detected in the detection space 300 .
  • the light receiving section 72 includes, for example, a light receiving element 721 and a light receiving side optical element 722, as shown in FIGS.
  • the light receiving element 721 is a component that receives light (such as scattered light), and can be configured using a photodiode, for example.
  • the light receiving element 721 is mounted on the substrate 62 .
  • the light-receiving side optical element 722 is a component that guides the light in the detection space 300 to the light-receiving element 721, and can be configured using a prism, for example.
  • the light-receiving side optical element 722 is housed in the smoke detector cover 3 and the smoke detector base 5 .
  • the light-receiving-side optical element 722 guides the scattered light that is scattered by the smoke particles and enters the light-receiving-side optical element 722 and the light that is reflected by the second reflecting section 402 and enters the light-receiving-side optical element 722 to the light-receiving element 721 .
  • the light-receiving side optical element 722 is directed toward the second reflecting section 402 so as to receive the light reflected by the second reflecting section 402 .
  • a gas sensor for example, a CO gas sensor
  • a CO gas sensor for detecting fire gas
  • the smoke detector cover 3 includes, for example, an opening 31, a light emitting side housing 32, a light receiving side housing 33, an inclined side wall 34, a right angle side wall 35, a first wall 41, A second wall portion 42 , a third wall portion 43 , a fourth wall portion 44 , a fifth wall portion 45 , a sixth wall portion 46 , a seventh wall portion 47 and an adjusting portion 48 are provided.
  • the smoke detection section cover 3 includes, for example, a first reflecting section 401, a second reflecting section 402, a third reflecting section 403, and a fourth reflecting section 404, as shown in FIG.
  • the opening 31 is an opening for allowing the hot airflow to flow into the detection space 300 and for the hot airflow to flow out from the detection space 300 .
  • the opening 31 is, for example, a circular opening and has substantially the same diameter as the first opening 21 of the inner cover 2, as shown in FIG.
  • the light-emitting side housing portion 32 is a portion for housing the light-emitting side optical element 712 (FIGS. 5 and 6), and corresponds to the light-emitting side housing portion 51 of the smoke detector base 5 in the assembled sensor 100. It is the part provided in the position.
  • the light receiving side housing portion 33 is a portion for housing the light receiving side optical element 722 (FIGS. 5 and 6), and corresponds to the light receiving side housing portion 52 of the smoke detector base 5 in the sensor 100 in the assembled state. It is the part provided in the position.
  • the inclined side wall portion 34 is a portion forming part of the side surface of the smoke detector cover 3, and as shown in FIGS. These are the portions provided at opposing positions.
  • the inclined side wall portion 34 is inclined, for example, toward the front side (lower side in FIG. 20) as it goes inward from the outer peripheral side of the smoke detection section cover 3 in a front view.
  • the right-angled side wall portion 35 is a portion forming part of the side surface of the smoke detection section cover 3, and as shown in FIGS. It is the part that is perpendicular to the flat plate-like part of the The right-angled side wall portion 35 is a portion provided next to the light-receiving side accommodation portion 33 .
  • the first wall portion 41 to the seventh wall portion 47 are portions provided so as to stand on the inner surface of the inclined side wall portion 34, and are portions provided with a gap between each other. .
  • the first wall portion 41 to the seventh wall portion 47 are provided inside the detection space 300 in the assembled sensor 100, for example.
  • the first wall portion 41 to the seventh wall portion 47 may be formed integrally with the smoke detection section cover 3, or may be formed separately from the smoke detection section cover 3 and then coated with an adhesive or the like. Although it may be fixed by using, in the present embodiment, it is assumed to be integrally formed (the same applies to the adjusting portion 48).
  • the adjusting portion 48 is a portion that functions as a fourth reflecting portion 404 to be described later, and is, for example, a portion provided on the inner surface of the right-angled side wall portion 35 . As shown in FIGS. 18 and 28, the adjusting portion 48 is formed, for example, by combining a large number of ridges and grooves.
  • a part of the emitted light irradiated to the adjusting portion 48 (for example, the emitted light irradiated to the groove portion) is A part of the emitted light (for example, the emitted light emitted to the top of the peak) that is not captured and reflected to the light receiving unit 72 and the second reflecting unit 402 and is irradiated is reflected by the second reflecting unit It is configured to reflect while diffusing toward 402 .
  • the light is attenuated when the light is diffused.
  • the first reflecting portion 401 is a portion provided within the detection space 300 and is a portion that does not reflect emitted light toward the second reflecting portion 402 and the light receiving portion 72 when emitted light is irradiated.
  • the first reflecting portion 401 is a portion shown by hatching in FIG. 28, that is, a portion surrounded by the first wall portion 41 and the third wall portion 43. This is the portion where the wall portion 43 is provided.
  • the first reflecting section 401 captures part of the emitted light and reflects the other part of the emitted light while diffusing it toward the third reflecting section 403 .
  • the phrase "not reflecting emitted light toward the light receiving section 72" is a concept indicating, for example, not reflecting emitted light of an amount that affects the operation of the sensor 100 toward the light receiving section 72.
  • the first reflecting portion 401 to reflect the emitted light means, for example, that the emitted light is It is a concept that indicates that the Similar expressions regarding other reflecting portions are assumed to be similar concepts.
  • the area corresponding to the first reflecting part 401 indicated by hatching in FIG. 28 may be interpreted as corresponding to the "predetermined area”.
  • the second reflecting portion 402 is a portion provided within the detection space 300, and is a portion that reflects emitted light toward the light receiving portion 72 when emitted light is irradiated. are portions provided at different positions.
  • the second reflecting portion 402 is the portion shown by hatching in FIG. 28, that is, the portion surrounded by the third wall portion 43 and the sixth wall portion 46. This is the portion where the wall portion 46 is provided.
  • the second reflecting portion 402 is, for example, a portion provided at a position facing the light receiving portion 72 .
  • the third reflecting portion 403 is a portion provided in the detection space 300, and is a portion that does not reflect emitted light toward the second reflecting portion 402 and the light receiving portion 72 when emitted light is irradiated, This portion is provided at a position different from that of the first reflecting portion 401 .
  • the third reflecting portion 403 is a hatched portion in FIG. 28 , that is, a portion surrounded by the sixth wall portion 46 and the seventh wall portion 47 .
  • the third reflecting part 403 is, for example, a part provided on the opposite side of the first reflecting part 401 with respect to the second reflecting part 402 when viewed from the front. That is, the third reflecting portion 403 and the above-described first reflecting portion 401 are portions provided on both sides of the second reflecting portion 402 when viewed from the front.
  • the third reflecting section 403 captures part of the emitted light and reflects the other part of the emitted light while diffusing it toward the first reflecting section 401 .
  • the fourth reflector 404 is a portion provided in the detection space 300, and when emitted light is irradiated, captures a part of the emitted light and 402 , and diffuses and reflects a part of the irradiated emitted light toward the second reflecting portion 402 .
  • the fourth reflecting portion 404 is a portion formed by the adjusting portion 48 as shown in FIG.
  • the four reflectors of the first reflector 401 to the fourth reflector 404, or each member of the sensor 100 that constitutes these reflectors, is interpreted as corresponding to the "instrumental light processing unit.”
  • the first reflecting section 401 and the third reflecting section 403, or only each member of the sensor 100 that constitutes these reflecting sections, may be interpreted as corresponding to the "instrumental light processing section.”
  • the “disturbance light processing unit” is a part that processes disturbance light other than scattered light that is generated in the detection space 300 due to emitted light. There is.
  • Internal disturbance light is a concept that indicates light other than scattered light scattered by smoke particles, among the light caused by the emitted light emitted from the light emitting unit 71. For example, the emitted light itself or the reflected emitted light This is a concept that includes incident light and the like.
  • Treatment of disturbance light is a concept that indicates adjusting the direction or amount of disturbance light, for example, reflecting and diffusing disturbance light, or capturing and attenuating disturbance light. It is a concept that includes
  • the light emitting side optical element 712 and the light receiving side optical element 722 are housed in the light emitting side housing portion 51 (FIGS. 23 and 26) and the light receiving side housing portion 52 of the smoke detector base 5 .
  • the smoke detection section cover 3 is attached to the smoke detection section base 5 by any method (for example, a method using an engaging structure provided on each component, etc.).
  • the light emitting side optical element 712 and the light receiving side optical element 722 are also accommodated in the light emitting side accommodating portion 32 (FIG. 19) and the light receiving side accommodating portion 33 of the smoke detector cover 3 .
  • the substrate 62 (FIG. 4) on which the light emitting element 711, the light receiving element 721, and the detection element 700 are mounted is attached to the terminal board 63 from the front side of the terminal board 63 (the upper side in FIG. 6).
  • the fitting fitting 64 is attached to the terminal board 63 from the back side of the terminal board 63 (bottom side of the drawing in FIG. 6) by an arbitrary method (for example, a screwing method or the like).
  • the smoke detection unit base 5 with the smoke detection unit cover 3 attached is attached to the substrate 62 from the front side of the substrate 62 (the upper side of the drawing in FIG. 6) by any method (for example, the or a method of screwing with a screw, etc.).
  • the inner cover 2 is attached to the terminal board 63 from the front side (the upper side of the drawing in FIG. 6) of the terminal board 63 to which the smoke detection section cover 3 and the like are attached.
  • a method that uses an engagement structure that is In this case part of the detection element 700 is inserted through the second opening 22 (FIG. 12) of the inner cover 2 and protrudes from the inner cover 2 toward the front side as shown in FIG. become.
  • an insect screen 61 is provided on the first opening 21 of the inner cover 2 .
  • the outer cover 1 is attached to the terminal board 63 from the front side (the upper side of the drawing in FIG. 6) of the terminal board 63 to which the inner cover 2 and the like are attached by an arbitrary method (for example, method using an engagement structure, etc.).
  • the labyrinth portion 15 of the outer cover 1 comes into contact with the projecting portion 23 of the inner cover 2.
  • a part of the partition wall 151 of the labyrinth part 15 presses the insect screen 61 described above, and the insect screen 61 becomes a sensor. It will be fixed at 100.
  • the assembly of the sensor 100 shown in FIGS. 1-4 is completed.
  • the emitted light from the light emitting part 71 is directly irradiated to, for example, the first reflecting part 401 and the fourth reflecting part 404 as indicated by arrows A1 to A6 in FIGS.
  • the portion 72 is not directly irradiated. Note that "directly irradiated” is a concept indicating direct irradiation without being reflected or scattered.
  • the reflected emitted light is captured by the third reflecting section 403 or reflected by the first reflecting section 401 and reflected by the second reflecting section 402, the fourth reflecting section 404, and the light receiving section 72. It will not be done.
  • Another part of the emitted light that is directly applied to the fourth reflecting section 404 is secondly reflected at the top of the mountain portion of the adjusting section 48 that forms the fourth reflecting section 404, as indicated by an arrow A5.
  • the light is diffused and reflected toward the portion 402 .
  • the reflected emitted light is diffused and reflected toward the light receiving portion 72 by the third wall portion 43 of the second reflecting portion 402 .
  • the emitted light which has been emitted from the light emitting portion 71 and is reflected and diffused multiple times to have a relatively small amount of light, is received by the light receiving portion 72 .
  • the amount of light here is sufficiently smaller than the amount of light scattered by the smoke particles, and can be distinguished from the amount of scattered light. Then, it is confirmed whether or not the sensor 100 is operating normally based on whether or not the light receiving unit 72 can receive the above-described emitted light with a relatively small amount of light at the timing corresponding to the emitted timing. It becomes possible to
  • the damping section 53 of the smoke detector base 5 is oriented vertically downward as shown in FIG. It is possible to prevent dust and the like from accumulating in the groove portion of the attenuation portion 53 and prevent the occurrence of irregular reflection due to the dust and the like.
  • FIG. 1 ambient light outside the sensor 100 is blocked by the plurality of partition walls 151 (FIG. 11) of the labyrinth section 15, so that the detection space 300 passes through the opening 31 of the smoke detection section cover 3. This prevents disturbance light from entering the interior.
  • the hot airflow generated in the monitoring area flows into the outer cover 1 through the opening 14 of the outer cover 1 .
  • part of the hot airflow that has flowed in is supplied to the detection element 700 along the outer peripheral wall of the stepped portion 231 .
  • Another part of the inflowing hot airflow is supplied from the outer peripheral side of the sensor 100 to the inside through the gaps 152 (FIG. 11) between the plurality of partition walls 151 of the labyrinth part 15, and is supplied to the inner cover. 2 and the opening 31 of the smoke detector cover 3 into the detection space 300 .
  • the hot airflow passes through a plurality of small holes (not shown) of the insect screen 61 and passes through the detection space. Flow into 300.
  • first opening 21 of the inner cover 2 and the opening 31 of the smoke detector cover 3 are circular, variations in the inflow characteristics with respect to the inflow direction of the hot air flow can be suppressed relatively small. It is possible to reliably allow hot airflow to flow into the space 300 from all directions.
  • the sensor 100 detects a fire based on the amount of light received by the light receiving unit 72 or the temperature of the hot air current detected by the detection element 700, for example. can be done, so only an overview will be given.
  • the temperature detected by the detection element 700 is at the room temperature level. In this case, the detector 100 will not detect fire.
  • a hot air current containing smoke particles is supplied to the detection element 700, and the temperature detected by the detection element 700 rises to a predetermined level. In this case, the detector 100 detects fire.
  • fire detection operation described here is an example and is not limited. More specifically, the following operations may be performed.
  • the light receiving unit 72 may be configured to detect a fire when the light receiving unit 72 receives a relatively large amount of light and the temperature detected by the detecting element 700 rises to a predetermined level. It may be configured to detect a fire regardless of the temperature detected by the detection element 700 when a relatively large amount of light is received.
  • the third reflecting portion 403 is provided so as not to reflect the emitted light toward the light receiving portion 72 when the emitted light is emitted.
  • the third reflecting portion 403 By reflecting toward 403, for example, it is possible to diffuse and attenuate the emitted light irradiated to the first reflecting section 401, so that the light receiving section 72 receives light other than the scattered light, which has a relatively large amount of light. It is possible to prevent the light from being received.
  • the second reflecting section 402 is provided at a position facing the light receiving section 72, and the first reflecting section 401 and the third reflecting section 403 are provided on both sides of the second reflecting section 402, respectively. , the light emitted into the detection space 300 can be properly processed.
  • part of the emitted light that is emitted is captured and is not reflected to the light receiving part 72 and the second reflecting part 402, and another part of the emitted light that is emitted is diffused toward the second reflecting part 402.
  • the fourth reflecting part 404 that reflects while reflecting for example, it is possible to prevent the light receiving part 72 from receiving light with a relatively large amount of light other than scattered light, so that the fire detection accuracy can be improved. becomes possible.
  • since light having a relatively small amount of light can be received by the light receiving section 72, it is possible to check the operation of the sensor 100 using the light.
  • the labyrinth portion 15 of FIG. 8 may be provided on the outer cover 1 .
  • the labyrinth portion 15 may be formed integrally with the inner cover 2, or the separately formed labyrinth portion 15 may be fixed to the inner cover 2 using an adhesive or the like. .
  • the adjustment portion 48 of FIG. 18 has been described as having a structure composed of a combination of a large number of ridges and grooves, but the present invention is not limited to this.
  • the adjustment portion 48 may be configured as a flat plate-like portion that does not have a peak portion and a groove portion. In this case, the light emitted from the light emitting section 71 is reflected at the flat plate portion at a reflection angle corresponding to the angle of incidence, so the flat plate portion is configured as follows. good too.
  • the light receiving section 72 may be configured to receive a relatively small amount of light.
  • the labyrinth unit 15 is the ambient light processing unit in the above embodiment, the present invention is not limited to this.
  • a prevention member for preventing disturbance light from entering the detection space 300 may be provided separately from the labyrinth section 15, and the prevention member may be used as the disturbance light processing section.
  • the fire detection device of Supplementary Note 1 is a fire detection device for detecting a fire in a monitoring area, and includes a detection space into which a detection target caused by the fire flows and an emitted light for detecting the detection target.
  • a light-emitting unit that emits light into a detection space, and a light-receiving unit that receives scattered light generated by the emitted light being scattered by the detection object in the detection space, wherein the detection space is irradiated with the emitted light.
  • a first reflecting portion that does not reflect the emitted light toward the light receiving portion when the and the second reflecting portion provided at a position different from the first reflecting portion, wherein the emitted light from the light emitting portion is directly irradiated to the first reflecting portion, and the light emitted from the light emitting portion is directly irradiated to the first reflecting portion.
  • the emitted light does not directly irradiate the second reflecting section.
  • the fire detection device of Supplementary Note 2 is the fire detection device of Supplementary Note 1, wherein the detection space is a third reflecting portion that does not reflect the emitted light toward the light receiving portion when the emitted light is irradiated. and the third reflecting portion provided at a position different from the first reflecting portion, wherein the first reflecting portion reflects the emitted light directly emitted from the light emitting portion to the third reflecting portion. reflect towards.
  • the fire detection device according to Supplementary Note 3 is the fire detection device according to Supplementary Note 2, wherein the second reflecting portion is provided at a position facing the light receiving portion, and the first reflecting portion and the third reflecting portion are , are provided on both sides of the second reflector.
  • the fire detection device of Supplementary Note 4 is the fire detection device according to any one of Supplementary Notes 1 to 3, wherein when the emitted light is irradiated, the detection space emits a part of the emitted light.
  • a fourth reflecting portion that captures and does not reflect to the light receiving portion and the second reflecting portion and diffuses and reflects the other part of the emitted light that is irradiated toward the second reflecting portion; The emitted light from the light emitting section is directly irradiated to the first reflecting section and the fourth reflecting section.
  • the light emitted from the light emitting part from directly irradiating the second reflecting part and the light receiving part from being irradiated with the emitted light, so that the light emitted to the detection space can be appropriately processed becomes possible.
  • the light receiving unit from receiving light with a relatively large amount of light other than the scattered light generated by scattering the emitted light caused by the detection target caused by the fire, thereby improving the fire detection accuracy. It becomes possible.
  • the third reflecting portion is provided so as not to reflect the emitted light toward the light receiving portion when the emitted light is irradiated, and the first reflecting portion is the light emitted directly from the light emitting portion.
  • the incident light toward the third reflecting portion for example, it is possible to diffuse and attenuate the emitted light irradiated to the first reflecting portion. It is possible to prevent the light receiving section from receiving light.
  • the second reflector is provided at a position facing the light receiver, and the first reflector and the third reflector are provided on both sides of the second reflector. This makes it possible, for example, to properly process the light emitted into the detection space.
  • a part of the emitted light that is emitted is captured and is not reflected to the light receiving section and the second reflector, and the other part of the emitted light that is emitted is reflected to the second
  • the fourth reflecting portion that diffuses and reflects toward the second reflecting portion, for example, it is possible to prevent the light receiving portion from receiving light with a relatively large amount of light other than the scattered light, thereby detecting fire. It is possible to improve the accuracy.
  • since light with a relatively small amount of light can be received by the light receiving section, it is possible to check the operation of the fire detection device using the light.

Abstract

The purpose of the present invention is to provide a fire detection device that can appropriately process light emitted in a detection space.　A sensor 100 for detecting fire in a monitoring region comprises: a detection space into which detection objects caused by fire flow; a light-emitting unit 71 that emits, into the detection space, emission light for detecting a detection object; and a light-receiving unit 72 that receives scattered light generated by the emission light being scattered by the detection object in the detection space. The detection space is provided with a first reflecting unit that does not reflect emission light toward the light-receiving unit 72 when emission light is irradiated, and a second reflecting unit that reflects emission light toward the light-receiving unit 72 when emission light is irradiated, the second reflecting unit being provided at a different position from that of the first reflecting unit. The emission light from the light-emitting unit 71 is directly irradiated on the first reflecting unit, and the emission light from the light-emitting unit 71 is not directly irradiated on the second reflecting unit.

Description

火災検出装置fire detection device
　本発明は、火災検出装置に関する。 The present invention relates to a fire detection device.
　従来、散乱光式感知器が知られていた（例えば、特許文献１）。この散乱光式感知器は、当該散乱光式感知器の検出空間に流入した煙粒子に対して光を照射することにより生じる散乱光に基づいて、火災を検出していた。 Conventionally, scattered light sensors have been known (for example, Patent Document 1). This scattered light sensor detects fire based on scattered light generated by irradiating smoke particles that have flowed into the detection space of the scattered light sensor with light.
特開２０２０－１８７４６２号公報JP 2020-187462 A
　散乱光式感知器においては、火災検出の精度向上の観点からは、検出空間に出射される光を適切に処理する技術が要望されていた。 From the perspective of improving the accuracy of fire detection, there has been a demand for a technology that appropriately processes the light emitted into the detection space for scattered light sensors.
　本発明は、上記に鑑みてなされたものであって、検出空間に出射される光を適切に処理することが可能となる火災検出装置を提供することを目的とする。 The present invention has been made in view of the above, and an object of the present invention is to provide a fire detection device that can appropriately process the light emitted into the detection space.
　上述した課題を解決し、目的を達成するために、請求項１に記載の火災検出装置は、監視領域の火災を検出するための火災検出装置であって、前記火災に起因する検出対象が流入する検出空間と、前記検出対象を検出するための出射光を前記検出空間内に出射する発光部と、前記出射光が前記検出空間内の前記検出対象により散乱されて生じる散乱光を受光する受光部と、を備え、前記検出空間は、前記出射光が照射された場合に前記受光部に向けて前記出射光を反射しない第１反射部と、前記出射光が照射された場合に前記受光部に向けて前記出射光を反射する第２反射部であって、前記第１反射部とは異なる位置に設けられている前記第２反射部と、を備え、前記発光部からの前記出射光は、前記第１反射部に直接照射され、前記発光部からの前記出射光は、前記第２反射部に直接照射されない。 In order to solve the above-mentioned problems and achieve the object, the fire detection device according to claim 1 is a fire detection device for detecting fire in a monitoring area, wherein a detection target caused by the fire flows into the system. a light emitting unit that emits emitted light into the detection space for detecting the detection target; and a light receiver that receives scattered light generated when the emitted light is scattered by the detection target in the detection space. and the detection space includes a first reflecting portion that does not reflect the emitted light toward the light receiving portion when the emitted light is irradiated, and the light receiving portion when the emitted light is irradiated. a second reflecting portion that reflects the emitted light toward the second reflecting portion, the second reflecting portion being provided at a position different from the first reflecting portion, wherein the emitted light from the light emitting portion is , the first reflecting portion is directly irradiated, and the emitted light from the light emitting portion is not directly irradiated to the second reflecting portion.
　また、請求項２に記載の火災検出装置は、請求項１に記載の火災検出装置において、前記検出空間は、前記出射光が照射された場合に前記受光部に向けて前記出射光を反射しない第３反射部であって、前記第１反射部とは異なる位置に設けられている前記第３反射部、を備え、前記第１反射部は、前記発光部から直接照射された前記出射光を、前記第３反射部に向けて反射する。 The fire detection device according to claim 2 is the fire detection device according to claim 1, wherein the detection space does not reflect the emitted light toward the light receiving unit when the emitted light is irradiated. a third reflecting portion provided at a position different from the first reflecting portion, wherein the first reflecting portion reflects the emitted light directly emitted from the light emitting portion; , are reflected toward the third reflecting portion.
　また、請求項３に記載の火災検出装置は、請求項２に記載の火災検出装置において、前記第２反射部は、前記受光部と対向する位置に設けられており、前記第１反射部及び前記第３反射部は、前記第２反射部の両側に各々設けられている。 The fire detection device according to claim 3 is the fire detection device according to claim 2, wherein the second reflector is provided at a position facing the light receiving part, and the first reflector and The third reflectors are provided on both sides of the second reflector.
　また、請求項４に記載の火災検出装置は、請求項１から３の何れか一項に記載の火災検出装置において、前記検出空間は、前記出射光が照射された場合に、照射された一部の前記出射光を捕捉して前記受光部及び前記第２反射部へ反射せず、且つ、照射された他の一部の前記出射光を前記第２反射部に向けて拡散しつつ反射する第４反射部、を備え、前記発光部からの前記出射光は、前記第１反射部及び前記第４反射部に直接照射される。 Further, the fire detection device according to claim 4 is the fire detection device according to any one of claims 1 to 3, wherein the detection space is the irradiated light when the emitted light is irradiated. part of the emitted light is captured and not reflected to the light receiving part and the second reflecting part, and the other part of the emitted light that is irradiated is reflected while being diffused toward the second reflecting part. and a fourth reflecting section, wherein the emitted light from the light emitting section is directly irradiated to the first reflecting section and the fourth reflecting section.
　請求項１に記載の火災検出装置によれば、出射光が照射された場合に受光部に向けて出射光を反射しない第１反射部と、出射光が照射された場合に受光部に向けて出射光を反射する第２反射部と、を備えており、発光部からの出射光は、第１反射部に直接照射され、発光部からの出射光は、第２反射部に直接照射されないことにより、例えば、発光部からの出射光が第２反射部に直接照射されて当該出射光が受光部に照射されることを防止することができるので、検出空間に出射される光を適切に処理することが可能となる。例えば、火災に起因する検出対象によって出射光が散乱されて生じる散乱光以外の比較的光量が大きな光を受光部が受光することを防止することができるので、火災の検出精度を向上させることが可能となる。 According to the fire detection device according to claim 1, when the emitted light is irradiated, the first reflecting portion that does not reflect the emitted light toward the light receiving portion, and when the emitted light is irradiated, toward the light receiving portion and a second reflecting portion that reflects the emitted light, and the emitted light from the light emitting portion is directly irradiated to the first reflecting portion, and the emitted light from the light emitting portion is not directly irradiated to the second reflecting portion. Therefore, for example, it is possible to prevent the emitted light from the light emitting unit from directly irradiating the second reflecting unit and the emitted light from irradiating the light receiving unit, so that the light emitted to the detection space can be appropriately processed. It becomes possible to For example, it is possible to prevent the light receiving unit from receiving light with a relatively large amount of light other than the scattered light generated by scattering the emitted light caused by the detection target caused by the fire, thereby improving the fire detection accuracy. It becomes possible.
　また、請求項２に記載の火災検出装置によれば、出射光が照射された場合に受光部に向けて出射光を反射しない第３反射部を備え、第１反射部は発光部から直接照射された出射光を第３反射部に向けて反射することにより、例えば、第１反射部に照射された出射光を拡散して減衰させることが可能となるので、散乱光以外の比較的光量が大きな光を受光部が受光することを防止することが可能となる。 Further, according to the fire detection device of claim 2, the third reflector is provided so as not to reflect the emitted light toward the light receiver when the emitted light is irradiated, and the first reflector is directly irradiated from the light emitter. By reflecting the emitted light toward the third reflecting portion, for example, it is possible to diffuse and attenuate the emitted light irradiated to the first reflecting portion, so that the amount of light other than scattered light is relatively small. It is possible to prevent the light receiving section from receiving a large amount of light.
　また、請求項３に記載の火災検出装置によれば、第２反射部は受光部と対向する位置に設けられており、第１反射部及び第３反射部は第２反射部の両側に各々設けられていることにより、例えば、検出空間に出射される光を適切に処理することが可能となる。 Further, according to the fire detection device of claim 3, the second reflector is provided at a position facing the light receiving part, and the first reflector and the third reflector are provided on both sides of the second reflector. By being provided, for example, it becomes possible to appropriately process the light emitted to the detection space.
　また、請求項４に記載の火災検出装置によれば、照射された一部の出射光を捕捉して受光部及び第２反射部へ反射せず、且つ、照射された他の一部の出射光を第２反射部に向けて拡散しつつ反射する第４反射部を備えることにより、例えば、散乱光以外の比較的光量が大きな光を受光部が受光することを防止することができるので、火災の検出精度を向上させることが可能となる。また、比較的光量が小さな光を受光部に受光させることができるので、当該光を利用して火災検出装置の動作確認を行うことが可能となる。 In addition, according to the fire detection device of claim 4, a part of the irradiated emitted light is captured and not reflected to the light receiving part and the second reflecting part, and the other part of the emitted light is captured. By providing the fourth reflecting portion that diffuses and reflects incident light toward the second reflecting portion, for example, it is possible to prevent the light receiving portion from receiving light with a relatively large amount of light other than scattered light. It is possible to improve the fire detection accuracy. In addition, since light with a relatively small amount of light can be received by the light receiving section, it is possible to check the operation of the fire detection device using the light.
本実施の形態に係る感知器の側面図である。It is a side view of the sensor according to the present embodiment. 感知器の斜視図である。Fig. 3 is a perspective view of a sensor; 感知器の正面図である。It is a front view of a sensor. 図３のＡ－Ａ断面図である。FIG. 4 is a cross-sectional view taken along the line AA of FIG. 3; 感知器の分解斜視図である。Fig. 3 is an exploded perspective view of the sensor; 感知器の分解斜視図である。Fig. 3 is an exploded perspective view of the sensor; 外カバーの斜視図である。FIG. 4 is a perspective view of an outer cover; 外カバーの斜視図である。FIG. 4 is a perspective view of an outer cover; 外カバーの側面図である。FIG. 4 is a side view of the outer cover; 外カバーの正面図である。It is a front view of an outer cover. 外カバーの背面図である。It is a rear view of an outer cover. 内カバーの斜視図である。It is a perspective view of an inner cover. 内カバーの斜視図である。It is a perspective view of an inner cover. 内カバーの側面図である。It is a side view of an inner cover. 内カバーの正面図である。It is a front view of an inner cover. 内カバーの背面図である。It is a rear view of an inner cover. 検煙部カバーの斜視図である。It is a perspective view of a smoke detector cover. 検煙部カバーの斜視図である。It is a perspective view of a smoke detector cover. 検煙部カバーの斜視図である。It is a perspective view of a smoke detector cover. 検煙部カバーの側面図である。It is a side view of a smoke detector cover. 検煙部カバーの正面図である。It is a front view of a smoke detector cover. 検煙部カバーの背面図である。It is a rear view of the smoke detector cover. 検煙部ベースの斜視図である。Fig. 10 is a perspective view of the smoke detector base; 検煙部ベースの斜視図である。Fig. 10 is a perspective view of the smoke detector base; 検煙部ベースの側面図である。FIG. 11 is a side view of the smoke detector base; 検煙部ベースの正面図である。It is a front view of a smoke detector base. 検煙部ベースの背面図である。It is a rear view of the smoke detector base. 検出空間の内部を示す図である。It is a figure which shows the inside of detection space. 検出空間の内部を示す図である。It is a figure which shows the inside of detection space. 検出空間の内部を示す図である。It is a figure which shows the inside of detection space.
　以下に添付図面を参照して、この発明に係る火災検出装置の実施の形態を詳細に説明する。ただし、この実施の形態によって本発明が限定されるものではない。 Embodiments of the fire detection device according to the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited by this embodiment.
〔実施の形態の基本的概念〕
　まず、この実施の形態に係る火災検出装置の基本的概念を説明する。火災検出装置は、監視領域の火災を検出するための装置である。「監視領域」とは、火災検出装置による監視の対象となる領域であり、具体的には、室内又は室外の領域を示す概念であり、例えば、部屋、階段室、及び廊下等の任意の空間を示す概念である。 [Basic concept of the embodiment]
First, the basic concept of the fire detection device according to this embodiment will be explained. A fire detection device is a device for detecting fire in a monitored area. "Monitoring area" is an area to be monitored by a fire detection device. Specifically, it is a concept that indicates an indoor or outdoor area. It is a concept that indicates
　そして、以下に示す実施の形態では、「監視領域」が部屋である場合を例示して説明する。 In the embodiment shown below, a case where the "monitoring area" is a room will be described as an example.
［各実施の形態の具体的内容］
　次に、実施の形態の具体的内容について説明する。 [Specific contents of each embodiment]
Next, specific contents of the embodiment will be described.
（構成）
　まず、本実施の形態の感知器の構成について説明する。図１は、本実施の形態に係る感知器の側面図であり、図２は、感知器の斜視図であり、図３は、感知器の正面図であり、図４は、図３のＡ－Ａ断面図であり、図５及び図６は、感知器の分解斜視図である。なお、各図では、感知器１００における本願の特徴に関連する要素を図示して、符号を付して説明することとし、説明した要素以外の要素については、従来の感知器と同様な構成を適用してもよい。また、図４においては、断面のハッチングは説明の便宜上省略されている。 (composition)
First, the configuration of the sensor of this embodiment will be described. 1 is a side view of a sensor according to this embodiment, FIG. 2 is a perspective view of the sensor, FIG. 3 is a front view of the sensor, and FIG. 5 and 6 are exploded perspective views of the sensor. In each figure, the elements related to the features of the present application in the sensor 100 are illustrated and described with reference numerals, and the elements other than the described elements have the same configuration as the conventional sensor. may apply. Also, in FIG. 4, hatching of the cross section is omitted for convenience of explanation.
　なお、各図のＸ－Ｙ－Ｚ軸は相互に直交していることとし、Ｚ軸が、垂直方向（つまり、感知器１００の設置状態における縦方向又は厚み方向）を示しており、－Ｚ向きを正面側と称し、また、＋Ｚ向きを背面側と称して説明する。また、Ｘ軸及びＹ軸が、水平方向（つまり、感知器１００の設置状態における横方向又は幅方向）を示しているものとして説明する。また、図３のＸＹ平面において、感知器１００の中心から離れる向きを外周側と称し、当該中心に近づく向き内側と称して説明する。 It should be noted that the XYZ axes in each figure are orthogonal to each other, the Z axis indicates the vertical direction (that is, the vertical direction or thickness direction in the installed state of the sensor 100), and the -Z The direction will be referred to as the front side, and the +Z direction will be referred to as the rear side. Also, the X-axis and the Y-axis are assumed to represent the horizontal direction (that is, the horizontal direction or width direction when the sensor 100 is installed). Further, in the XY plane of FIG. 3, the direction away from the center of the sensor 100 is referred to as the outer peripheral side, and the direction closer to the center is referred to as the inner side.
　なお、図１の基準線８０１は、感知器１００の中心を通り且つ図面上下方向に平行な中心線であり、説明の便宜上図示されている。なお、他の各図の基準線も説明の便宜上図示されている。図１の基準線８０２は、検出素子７００の中心を通り且つ図面上下方向に平行な中心線である。基準線８０３は、突出部２３における最も正面側の位置と同一の高さ位置（つまり、段部２３１における最も正面側の位置と同一の高さ位置）を示す線である。 A reference line 801 in FIG. 1 is a center line that passes through the center of the sensor 100 and is parallel to the vertical direction of the drawing, and is shown for convenience of explanation. Note that reference lines in other drawings are also shown for convenience of explanation. A reference line 802 in FIG. 1 is a center line that passes through the center of the detection element 700 and is parallel to the vertical direction of the drawing. The reference line 803 is a line that indicates the same height position as the frontmost position of the protrusion 23 (that is, the same height position as the frontmost position of the stepped portion 231).
　図３の基準線８０４は、感知器１００の中心を通り且つ図面上下方向に平行な中心線であり、基準線８０５は、感知器１００の中心を通り且つ図面左右方向に平行な中心線である。 A reference line 804 in FIG. 3 is a center line that passes through the center of the sensor 100 and is parallel to the vertical direction of the drawing, and a reference line 805 is a center line that passes through the center of the sensor 100 and is parallel to the horizontal direction of the drawing. .
　図４の基準線８０６は、受光部７２の中心を通り且つ図面上下方向に平行な中心線であり、基準線８０７は、受光部７２の中心を通り且つ図面左右方向に平行な中心線である。図４の基準線８０８は、基部２００と同一の高さ位置を示す線であり、基準線８０９は、突出部２３における最も正面側の位置と同一の高さ位置（つまり、段部２３１における最も正面側の位置と同一の高さ位置）を示す線である。 A reference line 806 in FIG. 4 is a center line that passes through the center of the light receiving section 72 and is parallel to the vertical direction of the drawing, and a reference line 807 is a center line that passes through the center of the light receiving section 72 and is parallel to the horizontal direction of the drawing. . A reference line 808 in FIG. 4 is a line indicating the same height position as the base portion 200, and a reference line 809 indicates the same height position as the position of the protruding portion 23 closest to the front side (that is, the highest position of the stepped portion 231). This is a line indicating the same height position as the position on the front side).
　図５及び図６の基準線８１０、８１１は、感知器１００の中心を通り且つ図面上下方向に平行な中心線である。 Reference lines 810 and 811 in FIGS. 5 and 6 are center lines passing through the center of the sensor 100 and parallel to the vertical direction of the drawing.
　感知器１００は、監視領域に設けられている火災検出装置であり、例えば、監視領域の火災を検出するための装置である。感知器１００は、例えば、設置対象である天井９００に設置されている。 The sensor 100 is a fire detection device provided in the monitoring area, for example, a device for detecting fire in the monitoring area. The sensor 100 is installed, for example, on a ceiling 900 to be installed.
　なお、感知器１００の設置対象は天井９００に限らず、例えば、部屋の壁（不図示）等を設置対象としてもよいが、本実施の形態では、設置対象が天井９００である場合（つまり、感知器１００が天井９００に設置されている場合）を例示して説明する。 The installation target of the sensor 100 is not limited to the ceiling 900. For example, the installation target may be a wall (not shown) of a room. The case where the sensor 100 is installed on the ceiling 900) will be described as an example.
　感知器１００は、図５及び図６に示すように例えば、外カバー１、内カバー２、検煙部カバー３（検出空間カバー）、検煙部ベース５、防虫網６１（図６）、基板６２、端子盤６３、嵌合金具６４、検出素子７００、発光部７１、及び受光部７２を備える。 As shown in FIGS. 5 and 6, the sensor 100 includes, for example, an outer cover 1, an inner cover 2, a smoke detector cover 3 (detection space cover), a smoke detector base 5, an insect screen 61 (FIG. 6), and a substrate. 62 , a terminal board 63 , a fitting 64 , a detection element 700 , a light emitting portion 71 and a light receiving portion 72 .
（構成－外カバー）
　図７及び図８は、外カバーの斜視図であり、図９は、外カバーの側面図であり、図１０は、外カバーの正面図であり、図１１は、外カバーの背面図である。なお、各図において、同様な複数の構成（例えば、図９の接続部１３、開口部１４等）については、説明の便宜上一部の構成にのみ符号を付して説明する（他の図の他の構成要素も同様とする）。 (Configuration - outer cover)
7 and 8 are perspective views of the outer cover, FIG. 9 is a side view of the outer cover, FIG. 10 is a front view of the outer cover, and FIG. 11 is a rear view of the outer cover. . In addition, in each figure, regarding a plurality of similar configurations (for example, the connection portion 13, the opening portion 14, etc. in FIG. 9), only a part of the configuration will be described with reference numerals for convenience of explanation ( The same applies to other components).
　なお、図１０及び図１１の基準線８１２、８１４は、外カバー１の中心を通り且つ図面上下方向に平行な中心線であり、図１０及び図１１の基準線８１３、８１５は、外カバー１の中心を通り且つ図面左右方向に平行な中心線である。 Reference lines 812 and 814 in FIGS. 10 and 11 are center lines that pass through the center of the outer cover 1 and are parallel to the vertical direction of the drawing. is a center line passing through the center of and parallel to the horizontal direction of the drawing.
　外カバー１は、感知器１００の構成要素（内カバー２、及び検煙部カバー３等）を正面側から覆って収容するものであり、また、感知器１００の外形の一部を形成するものである。外カバー１は、例えば、樹脂製のものである。外カバー１は、例えば、図９の本体部１１、天板部１２、接続部１３、開口部１４、及びラビリンス部１５を備える。 The outer cover 1 covers and houses the components of the sensor 100 (the inner cover 2, the smoke detector cover 3, etc.) from the front side, and forms part of the outer shape of the sensor 100. is. The outer cover 1 is made of resin, for example. The outer cover 1 includes, for example, a main body portion 11, a top plate portion 12, a connection portion 13, an opening portion 14, and a labyrinth portion 15 shown in FIG.
（構成－外カバー－本体部）
　本体部１１は、所定径の略円筒形状となっている部分である。 (Configuration - outer cover - main body)
The body portion 11 is a portion having a substantially cylindrical shape with a predetermined diameter.
（構成－外カバー－天板部）
　天板部１２は、本体部１１の正面側に設けられている部分であり、本体部の外周よりも小径の円形の平板形状となっている部分である。 (Configuration - outer cover - top plate)
The top plate portion 12 is a portion provided on the front side of the main body portion 11, and is a circular plate-shaped portion having a smaller diameter than the outer circumference of the main body portion.
（構成－外カバー－接続部）
　接続部１３は、本体部１１と天板部１２とを相互に接続する部分であり、図９に示すように例えば、本体部１１と天板部１２との間において延在している部分である。 (Construction - outer cover - connection part)
The connecting portion 13 is a portion that connects the main body portion 11 and the top plate portion 12 to each other, and as shown in FIG. be.
（構成－外カバー－開口部）
　開口部１４は、熱気流を感知器１００の内部に流入させたり、当該熱気流を感知器１００の内部から流出させたりするための開口である。開口部１４は、本体部１１と天板部１２との間の隙間に形成されており、また、複数の接続部１３によって複数個に区画されている。 (Configuration - outer cover - opening)
The opening 14 is an opening for allowing the hot airflow to flow into the sensor 100 and for the hot airflow to flow out from the sensor 100 . The opening 14 is formed in a gap between the body portion 11 and the top plate portion 12 , and is divided into a plurality of openings 14 by a plurality of connecting portions 13 .
　なお、「熱気流」とは、監視領域の火災に伴って発生する検出対象を含む流体の流れを示す概念であり、例えば、比較的高温の流体の流れを示す概念である。「検出対象」とは、感知器１００で検出される対象であり、具体的には、監視領域の火災に伴って発生する対象であり、例えば、火災に伴って発生する煙粒子等を含む概念である。 The term "hot air flow" is a concept that indicates the flow of fluid containing a detection target that occurs with a fire in the monitored area, for example, the concept that indicates the flow of relatively high-temperature fluid. A “detection target” is a target to be detected by the sensor 100, specifically, a target generated by a fire in a monitoring area, for example, a concept including smoke particles generated by a fire. is.
（構成－外カバー－ラビリンス部）
　ラビリンス部１５は、外乱光の検出空間３００（図４）への入射を防止する外乱光処理部であり、具体的には、外乱光の検出空間３００への入射を防止すると共に、検出対象を含む流体を検出空間３００に導入するものである。ラビリンス部１５は、検出空間３００の外部に設けられているものである。ラビリンス部１５は、内乱光処理部を基準にして、感知器１００を設置対象である天井９００に設置するための取付部とは反対側に設けられている。なお、内乱光処理部、及び取付部については後述する。ラビリンス部１５は、図１１に示すように例えば、複数の区画壁１５１を備える。 (Configuration - outer cover - labyrinth part)
The labyrinth unit 15 is a disturbance light processing unit that prevents disturbance light from entering the detection space 300 (FIG. 4). It introduces the containing fluid into the detection space 300 . The labyrinth part 15 is provided outside the detection space 300 . The labyrinth section 15 is provided on the opposite side of the mounting section for mounting the sensor 100 on the ceiling 900, which is the installation target, with respect to the disturbance light processing section. In addition, the disturbance light processing section and the mounting section will be described later. The labyrinth part 15 includes, for example, a plurality of partition walls 151 as shown in FIG. 11 .
　なお、「検出空間」３００とは、火災に起因する検出対象である煙粒子を検出するための空間であり、遮光されている空間である。 It should be noted that the "detection space" 300 is a space for detecting smoke particles, which are detection targets caused by a fire, and is a shielded space.
　「外乱光」とは、感知器１００の外部から感知器１００に向けて照射される光であり、例えば、日光等の自然光、又は、照明等の人工光等を含む概念である。 "Disturbance light" is light emitted toward the sensor 100 from the outside of the sensor 100, and is a concept that includes, for example, natural light such as sunlight, or artificial light such as lighting.
　区画壁１５１は、天板部１２における背面側の面に固定されて設けられており、また、天板部１２から背面側に向かって所定高さ分だけ突出しており、また、相互間の間隙１５２を介して相互に隣接して設けられている。区画壁１５１は、天板部１２と一体的に形成してもよいし、あるいは、天板部１２とは別体として形成した上で、接着剤等を用いて固定してもよいが、本実施の形態では、一体的に形成されているものとする。区画壁１５１は、組み立てられた状態の図１の感知器１００において、内カバー２の段部２３１（後述の図１２も参照）の上面（正面側の面）から立設するように構成されている。区画壁１５１は、図１１に示すように、感知器１００の内側から外側に向かって延在している。 The partition wall 151 is fixed to the back side surface of the top plate portion 12, and protrudes from the top plate portion 12 toward the back side by a predetermined height. 152 adjacent to each other. The partition wall 151 may be formed integrally with the top plate portion 12, or may be formed separately from the top plate portion 12 and fixed using an adhesive or the like. In the embodiment, they are assumed to be integrally formed. In the assembled sensor 100 shown in FIG. 1, the partition wall 151 is configured to stand from the upper surface (front surface) of the stepped portion 231 (see also FIG. 12 described later) of the inner cover 2. there is The partition wall 151 extends from the inside to the outside of the sensor 100, as shown in FIG.
　このように構成することにより、熱気流は、区画壁１５１の相互間の間隙１５２を介して検出空間３００に導入されることになる。また、外乱光は、区画壁１５１で遮られて検出空間３００に入射しないことになる。 With this configuration, the hot airflow is introduced into the detection space 300 through the gaps 152 between the partition walls 151 . Moreover, disturbance light is blocked by the partition wall 151 and does not enter the detection space 300 .
（構成－内カバー）
　図１２及び図１３は、内カバーの斜視図であり、図１４は、内カバーの側面図であり、図１５は、内カバーの正面図であり、図１６は、内カバーの背面図である。 (Configuration - inner cover)
12 and 13 are perspective views of the inner cover, FIG. 14 is a side view of the inner cover, FIG. 15 is a front view of the inner cover, and FIG. 16 is a rear view of the inner cover. .
　なお、図１５及び図１６の長軸２３０は、突出部２３（図１５）の周形状である楕円の長軸を示しており、また、内カバー２の中心を通り且つ図面左右方向に平行な中心線も示している。図１５及び図１６の短軸２３０Ａは、突出部２３（図１５）の周形状である楕円の短軸を示しており、また、内カバー２の中心を通り且つ図面上下方向に平行な中心線も示している。 15 and 16 indicates the major axis of an ellipse that is the peripheral shape of the protruding portion 23 (FIG. 15). A centerline is also shown. A minor axis 230A in FIGS. 15 and 16 indicates the minor axis of the ellipse that is the circumferential shape of the protruding portion 23 (FIG. 15), and is a center line that passes through the center of the inner cover 2 and is parallel to the vertical direction in the drawing. also shows
　内カバー２は、感知器１００の構成要素（検煙部カバー３等）を覆って収容するものであり、また、正面視で円形となっているものである。内カバー２は、例えば、樹脂製のものである。内カバー２は、例えば、図１２の第１開口部２１、第２開口部２２、及び突出部２３を備える。 The inner cover 2 covers and houses the components of the sensor 100 (smoke detector cover 3, etc.), and has a circular shape when viewed from the front. The inner cover 2 is made of resin, for example. The inner cover 2 includes, for example, a first opening 21, a second opening 22, and a protrusion 23 shown in FIG.
（構成－内カバー－第１開口部）
　第１開口部２１は、熱気流を検出空間３００の内部に流入させたり、当該熱気流を検出空間３００の内部から流出させたりするための開口である。第１開口部２１は、図１５に示すように例えば、正面視で内カバー２の中心に設けられている円形の開口である。 (Configuration - inner cover - first opening)
The first opening 21 is an opening for causing the hot airflow to flow into the detection space 300 and for causing the hot airflow to flow out from the detection space 300 . The first opening 21 is, for example, a circular opening provided at the center of the inner cover 2 in front view, as shown in FIG. 15 .
（構成－内カバー－第２開口部）
　第２開口部２２は、検出素子７００が挿通されて配置される開口である。第２開口部２２は、図１５に示すように例えば、正面視で楕円形状となって突出部２３における長軸２３０上であって当該突出部２３の両側に設けられている矩形の開口である。 (Configuration - inner cover - second opening)
The second opening 22 is an opening through which the detection element 700 is inserted. As shown in FIG. 15, the second openings 22 are, for example, rectangular openings that are elliptical in front view and are provided on both sides of the protrusion 23 on the long axis 230 of the protrusion 23. .
（構成－内カバー－突出部）
　突出部２３は、内カバー２における基部２００（図１２、図１４、及び図１５）から正面側に向かって突出している部分である。突出部２３は、図１５に示すように例えば、正面視で楕円形状となっており、段部２３１を備える。 (Configuration - inner cover - protruding part)
The protrusion 23 is a portion of the inner cover 2 that protrudes from the base 200 (FIGS. 12, 14, and 15) toward the front side. As shown in FIG. 15, the projecting portion 23 has, for example, an elliptical shape when viewed from the front, and includes a stepped portion 231 .
　段部２３１は、突出部２３の一部であり、基部２００に対して突出して高くなっている部分である。 The stepped portion 231 is a part of the protruding portion 23 and is a portion that protrudes and rises with respect to the base portion 200 .
（構成－検煙部カバー）
　図１７～図１９は、検煙部カバーの斜視図であり、図２０は、検煙部カバーの側面図であり、図２１は、検煙部カバーの正面図であり、図２２は、検煙部カバーの背面図である。 (Composition - smoke detector cover)
17 to 19 are perspective views of the smoke detection cover, FIG. 20 is a side view of the smoke detection cover, FIG. 21 is a front view of the smoke detection cover, and FIG. It is a rear view of a smoke section cover.
　なお、図２１の基準線８１６は、検煙部カバー３の中心を通り且つ図面上下方向に平行な中心線であり、基準線８１８はこれに直交する中心線である。光軸９０１は、組み立てられた状態の感知器１００における発光部７１（図２８）の光軸を示している。光軸９０２は、組み立てられた状態の感知器１００における受光部７２（図２８）の光軸を示している。図２２の基準線８１７は、検煙部カバー３の中心を通り且つ図面上下方向に平行な中心線であり、基準線８１９はこれに直交する中心線である。 A reference line 816 in FIG. 21 is a center line passing through the center of the smoke detector cover 3 and parallel to the vertical direction of the drawing, and a reference line 818 is a center line orthogonal thereto. Optical axis 901 indicates the optical axis of light emitting portion 71 (FIG. 28) in sensor 100 in the assembled state. Optical axis 902 indicates the optical axis of receiver 72 (FIG. 28) in sensor 100 in the assembled state. A reference line 817 in FIG. 22 is a center line passing through the center of the smoke detector cover 3 and parallel to the vertical direction of the drawing, and a reference line 819 is a center line orthogonal thereto.
　検煙部カバー３は、検煙部ベース５と共に、検出空間３００（図４）、発光側光学素子７１２（図５及び図６）、及び受光側光学素子７２２を覆うものであり、すなわち、検出空間３００の内外を区画するものである。検煙部カバー３は、例えば、樹脂製のものである。この検煙部カバー３の詳細な説明は後述する。 The smoke detector cover 3 covers the detection space 300 (FIG. 4), the light emitting side optical element 712 (FIGS. 5 and 6), and the light receiving side optical element 722 together with the smoke detector base 5. It partitions the inside and outside of the space 300 . The smoke detector cover 3 is made of resin, for example. A detailed description of the smoke detector cover 3 will be given later.
（構成－検煙部ベース）
　図２３～図２４は、検煙部ベースの斜視図であり、図２５は、検煙部ベースの側面図であり、図２６は、検煙部ベースの正面図であり、図２７は、検煙部ベースの背面図である。 (Construction - smoke detector base)
23 and 24 are perspective views of the smoke detector base, FIG. 25 is a side view of the smoke detector base, FIG. 26 is a front view of the smoke detector base, and FIG. FIG. 11 is a rear view of the smoke section base;
　検煙部ベース５は、検煙部カバー３と共に、検出空間３００（図４）、発光側光学素子７１２（図５及び図６）、及び受光側光学素子７２２を覆うものであり、すなわち、検出空間３００の内外を区画するものである。検煙部ベース５は、例えば、樹脂製のものである。検煙部ベース５は、例えば、全体として平板形状のものであり、発光側収容部５１（図２３及び図２６）、受光側収容部５２、及び減衰部５３を備える。 The smoke detector base 5, together with the smoke detector cover 3, covers the detection space 300 (FIG. 4), the light emitting side optical element 712 (FIGS. 5 and 6), and the light receiving side optical element 722. It partitions the inside and outside of the space 300 . The smoke detector base 5 is made of resin, for example. The smoke detector base 5 has, for example, a flat plate shape as a whole, and includes a light emitting side accommodating portion 51 (FIGS. 23 and 26), a light receiving side accommodating portion 52, and an attenuation portion 53. As shown in FIG.
（構成－検煙部ベース－各収容部）
　発光側収容部５１は、発光側光学素子７１２（図５及び図６）を収容する部分である。 (Construction - smoke detector base - each storage part)
The light-emitting side housing portion 51 is a portion that houses the light-emitting side optical element 712 (FIGS. 5 and 6).
　受光側収容部５２は、受光側光学素子７２２（図５及び図６）を収容する部分である。 The light-receiving-side housing portion 52 is a portion that houses the light-receiving-side optical element 722 (FIGS. 5 and 6).
（構成－検煙部ベース－減衰部）
　減衰部５３は、埃や結露による出力上昇を抑制する誤報対策の部分であり、即ち埃や結露に伴い出力が上昇することで誤って煙粒子として検出されることを防止するものであり、例えば、検煙部ベース５における検出空間３００の内面を形成する正面側の面の所定範囲に設けられている。減衰部５３は、例えば、多数の山部及び溝部の組み合わせにより形成されている。 (Construction - smoke detector base - attenuation part)
The attenuation unit 53 is a countermeasure against false alarms that suppresses an increase in output due to dust or condensation. , are provided in a predetermined range on the front side surface forming the inner surface of the detection space 300 in the smoke detector base 5 . The damping portion 53 is formed, for example, by combining a large number of peaks and grooves.
（構成－防虫網）
　図６の防虫網６１は、検出空間３００（図４）に対する熱気流の流入又は流出を可能にしつつ、当該検出空間３００への虫の進入を防止するためのものである。防虫網６１は、例えば、内カバー２の第１開口部２１に設けられる円形のものであり、また、熱気流の流入又は流出を可能にし、且つ、虫の進入を防止可能とする程度の所定径の小孔（不図示）が複数設けられている。 (Composition - insect screen)
The insect screen 61 of FIG. 6 is intended to prevent insects from entering the detection space 300 (FIG. 4) while allowing hot air to flow into or out of the detection space 300 (FIG. 4). The insect screen 61 is, for example, a circular one provided in the first opening 21 of the inner cover 2, and has a predetermined thickness that allows hot air to flow in or out and prevents insects from entering. A plurality of small diameter holes (not shown) are provided.
（構成－基板）
　図５及び図６の基板６２は、各種素子、ＩＣ、又は電気配線等を含む電気回路が実装されている回路基板である。基板６２は、図６に示すように例えば、正面側の面に発光素子７１１、及び受光素子７２１が実装されているものである。また、基板６２は、これらの各素子に加えて、検出素子７００も実装されるものである。 (Configuration - substrate)
A substrate 62 in FIGS. 5 and 6 is a circuit board on which an electric circuit including various elements, ICs, or electric wiring is mounted. As shown in FIG. 6, the substrate 62 has, for example, a light emitting element 711 and a light receiving element 721 mounted on its front surface. In addition to these elements, the substrate 62 also has a detection element 700 mounted thereon.
（構成－端子盤）
　図５及び図６の端子盤６３は、感知器１００の構成要素（検煙部カバー３等）を背面側から覆うものである。端子盤６３は、嵌合金具６４を介して天井９００に取り付けられるものであり、すなわち、感知器１００を天井９００に取り付けるための取付部である。 (Configuration - terminal board)
The terminal board 63 in FIGS. 5 and 6 covers the components of the sensor 100 (smoke detector cover 3, etc.) from the rear side. The terminal board 63 is attached to the ceiling 900 via the fitting 64 , that is, it is an attachment portion for attaching the sensor 100 to the ceiling 900 .
（構成－嵌合金具）
　嵌合金具６４は、端子盤６３及び天井９００側の取付構造（例えば、嵌合金具６４と嵌合又は係合して当該嵌合金具６４が固定されて取り付けられるもの）に対して着脱自在の取付けられるものである。この嵌合金具６４を用いることにより、端子盤６３を含む感知器１００が天井９００に取り付け可能となる。なお、この嵌合金具６４が「取付部」に対応するものと解釈してもよい。 (Construction - Fitting fitting)
The fitting 64 is detachable from the terminal board 63 and the mounting structure on the ceiling 900 side (for example, fitting or engagement with the fitting 64 to fix and attach the fitting 64). be installed. By using this fitting 64 , the sensor 100 including the terminal board 63 can be attached to the ceiling 900 . It should be noted that this fitting fitting 64 may be interpreted as corresponding to the "mounting portion".
　また、本実施の形態では不図示であるが、端子盤６３とほぼ同径の円形の板状の部材である取付ベースを用いて、感知器１００を天井９００に取り付けることも想定されるが、この取付ベースを用いる場合、取付ベースが「取付部」に対応するものと解釈してもよい。なお、「取付ベース」とは、感知器１００と天井９００との相互間に設けられて、感知器１００を天井９００に設置して取り付けるための部材であるが、公知の構成を適用することができるので、詳細の説明を省略する。 Although not shown in the present embodiment, it is also assumed that the sensor 100 is attached to the ceiling 900 using a mounting base that is a circular plate-shaped member having approximately the same diameter as the terminal board 63. When using this mounting base, it may be interpreted that the mounting base corresponds to the "mounting portion". Note that the "mounting base" is a member provided between the sensor 100 and the ceiling 900 for installing and mounting the sensor 100 on the ceiling 900, but a known configuration can be applied. Therefore, detailed description is omitted.
（構成－検出素子）
　図５及び図６の検出素子７００は、監視領域の火災に伴って発生する熱気流の熱を検出する熱検出素子である。検出素子７００は、例えば、熱に対応する温度を検出し、当該検出した温度を示す温度情報を出力するサーミスタ等を用いて構成することができる。検出素子７００は、基板６２に実装され、図１２の内カバー２の第２開口部２２に挿通された状態で、内カバー２の正面側に当該検出素子７００の一部が突出して設けられる。尚、検出素子７００は、必ずしも搭載する必要は無く、搭載が有る場合は煙熱複合の感知器、搭載が無い場合は煙単独の感知器として運用される。 (Configuration - detection element)
Detecting element 700 in FIGS. 5 and 6 is a heat detecting element that detects the heat of the hot air flow that occurs with the fire in the monitored area. The detection element 700 can be configured using, for example, a thermistor or the like that detects a temperature corresponding to heat and outputs temperature information indicating the detected temperature. The detection element 700 is mounted on the substrate 62, and a part of the detection element 700 protrudes from the front side of the inner cover 2 while being inserted into the second opening 22 of the inner cover 2 in FIG. The detection element 700 does not necessarily have to be mounted, and is used as a combined smoke and heat sensor when mounted, and as a single smoke sensor when not mounted.
（構成－発光部）
　図２８～図３０は、検出空間の内部を示す図である。なお、図２８～図３０においては、組み立てられた状態の感知器１００において、正面側から検煙部カバー３の内部を見た状態が図示されており、検煙部ベース５の減衰部５３（図２６）等の図示は、説明の便宜上省略されている。また、図２９及び図３０においては、発光部７１から出射された出射光の経路が矢印Ａ１～Ａ６にて例示されている。特に、矢印Ａ１～Ａ６は、発光部７１が検煙部ベース５に対して平行な方向（つまり、図３のＸＹ平面に平行な方向）に向かって出射した光の経路を例示している。 (Construction - light emitting part)
28 to 30 are diagrams showing the inside of the detection space. 28 to 30 show the assembled sensor 100 with the inside of the smoke detector cover 3 viewed from the front side, and the damping portion 53 of the smoke detector base 5 ( Illustrations such as FIG. 26) are omitted for convenience of explanation. 29 and 30, arrows A1 to A6 exemplify paths of emitted light emitted from the light emitting portion 71. As shown in FIG. In particular, arrows A1 to A6 exemplify paths of light emitted from the light emitting section 71 in a direction parallel to the smoke detector base 5 (that is, a direction parallel to the XY plane in FIG. 3).
　図２８の発光部７１は、検出対象である煙粒子を検出するための出射光を検出空間３００内に出射する発光手段である。発光部７１は、図５及び図６に示すように例えば、発光素子７１１、及び発光側光学素子７１２を備える。 The light emitting unit 71 in FIG. 28 is light emitting means for emitting emitted light into the detection space 300 for detecting smoke particles that are detection targets. The light emitting section 71 includes, for example, a light emitting element 711 and a light emitting side optical element 712, as shown in FIGS.
（構成－発光部－発光素子）
　発光素子７１１は、光（出射光）を出射する構成要素であり、例えば、発光ダイオード（ＬＥＤ：Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）を用いて構成することができる。発光素子７１１は、基板６２に実装されている。 (Construction-light-emitting part-light-emitting element)
The light emitting element 711 is a component that emits light (outgoing light), and can be configured using, for example, a light emitting diode (LED: Light Emitting Diode). The light emitting element 711 is mounted on the substrate 62 .
（構成－発光部－発光側光学素子）
　発光側光学素子７１２は、発光素子７１１が出射した出射光を、検出空間３００内に導いて出射する構成要素であり、例えば、プリズムを用いて構成することができる。発光側光学素子７１２は、例えば、検煙部カバー３及び検煙部ベース５に収容されている。 (Construction-light-emitting part-light-emitting side optical element)
The light-emitting side optical element 712 is a component that guides and emits the light emitted by the light-emitting element 711 into the detection space 300, and can be configured using a prism, for example. The light emitting side optical element 712 is housed in the smoke detector cover 3 and the smoke detector base 5, for example.
　発光側光学素子７１２は、例えば、発光素子７１１からの光を、主に、検煙部ベース５に対して平行な方向（つまり、図３のＸＹ平面に平行な方向）に向かって出射するように構成されている。また、発光側光学素子７１２は、例えば、図２８の第１反射部４０１及び第４反射部４０４に向けて出射光を出射するように構成されている。なお、第１反射部４０１及び第４反射部４０４については、後述する。 The light-emitting side optical element 712 is configured, for example, to emit light from the light-emitting element 711 mainly in a direction parallel to the smoke detector base 5 (that is, a direction parallel to the XY plane in FIG. 3). is configured to Also, the light-emitting side optical element 712 is configured to emit emitted light toward the first reflecting portion 401 and the fourth reflecting portion 404 of FIG. 28, for example. Note that the first reflecting section 401 and the fourth reflecting section 404 will be described later.
（構成－受光部）
　図２８の受光部７２は、出射光が検出空間３００内の検出対象である煙粒子により散乱されて生じる散乱光等を受光する受光手段である。受光部７２は、図５及び図６に示すように例えば、受光素子７２１、及び受光側光学素子７２２を備える。 (Construction - light receiving part)
The light receiving section 72 in FIG. 28 is a light receiving means for receiving scattered light or the like generated by the emitted light being scattered by the smoke particles to be detected in the detection space 300 . The light receiving section 72 includes, for example, a light receiving element 721 and a light receiving side optical element 722, as shown in FIGS.
（構成－受光部－受光素子）
　受光素子７２１は、光（散乱光等）を受光する構成要素であり、例えば、フォトダイオードを用いて構成することができる。受光素子７２１は、基板６２に実装されている。 (Configuration - light receiving part - light receiving element)
The light receiving element 721 is a component that receives light (such as scattered light), and can be configured using a photodiode, for example. The light receiving element 721 is mounted on the substrate 62 .
（構成－受光部－受光側光学素子）
　受光側光学素子７２２は、検出空間３００内の光を受光素子７２１に導く構成要素であり、例えば、プリズムを用いて構成することができる。受光側光学素子７２２は、検煙部カバー３及び検煙部ベース５に収容されている。 (Construction - light receiving part - light receiving side optical element)
The light-receiving side optical element 722 is a component that guides the light in the detection space 300 to the light-receiving element 721, and can be configured using a prism, for example. The light-receiving side optical element 722 is housed in the smoke detector cover 3 and the smoke detector base 5 .
　受光側光学素子７２２は、煙粒子で散乱されて受光側光学素子７２２に入射した散乱光、及び、第２反射部４０２で反射されて受光側光学素子７２２に入射した光を受光素子７２１に導くように構成されている。受光側光学素子７２２は、第２反射部４０２で反射された光を受光するように、第２反射部４０２に向けられている。 The light-receiving-side optical element 722 guides the scattered light that is scattered by the smoke particles and enters the light-receiving-side optical element 722 and the light that is reflected by the second reflecting section 402 and enters the light-receiving-side optical element 722 to the light-receiving element 721 . is configured as The light-receiving side optical element 722 is directed toward the second reflecting section 402 so as to receive the light reflected by the second reflecting section 402 .
（構成－その他－ガスセンサ）
　上記構成の他、火災ガスを検出するガスセンサ（例えばＣＯガスセンサ）を搭載しても良い。 (Configuration - Others - Gas sensor)
In addition to the above configuration, a gas sensor (for example, a CO gas sensor) for detecting fire gas may be mounted.
（構成－検煙部カバーの詳細）
　次に、検煙部カバー３の詳細について説明する。検煙部カバー３は、図１７～図１９に示すように例えば、開口部３１、発光側収容部３２、受光側収容部３３、傾斜側壁部３４、直角側壁部３５、第１壁部４１、第２壁部４２、第３壁部４３、第４壁部４４、第５壁部４５、第６壁部４６、第７壁部４７、及び調整部４８を備える。また、検煙部カバー３は、図２８に示すように例えば、第１反射部４０１、第２反射部４０２、第３反射部４０３、及び第４反射部４０４を備える。 (Composition - details of the smoke detector cover)
Next, details of the smoke detector cover 3 will be described. As shown in FIGS. 17 to 19, the smoke detector cover 3 includes, for example, an opening 31, a light emitting side housing 32, a light receiving side housing 33, an inclined side wall 34, a right angle side wall 35, a first wall 41, A second wall portion 42 , a third wall portion 43 , a fourth wall portion 44 , a fifth wall portion 45 , a sixth wall portion 46 , a seventh wall portion 47 and an adjusting portion 48 are provided. Further, the smoke detection section cover 3 includes, for example, a first reflecting section 401, a second reflecting section 402, a third reflecting section 403, and a fourth reflecting section 404, as shown in FIG.
（構成－検煙部カバーの詳細－開口部）
　開口部３１は、熱気流を検出空間３００の内部に流入させたり、当該熱気流を検出空間３００の内部から流出させたりするための開口である。開口部３１は、図２１に示すように例えば、円形の開口であり、内カバー２の第１開口部２１と略同径である。 (Composition-details of smoke detector cover-opening)
The opening 31 is an opening for allowing the hot airflow to flow into the detection space 300 and for the hot airflow to flow out from the detection space 300 . The opening 31 is, for example, a circular opening and has substantially the same diameter as the first opening 21 of the inner cover 2, as shown in FIG.
（構成－検煙部カバーの詳細－各収容部）
　発光側収容部３２は、発光側光学素子７１２（図５及び図６）を収容する部分であり、組み立てられた状態の感知器１００において、検煙部ベース５の発光側収容部５１に対応する位置に設けられている部分である。 (Configuration - details of the smoke detector cover - each storage part)
The light-emitting side housing portion 32 is a portion for housing the light-emitting side optical element 712 (FIGS. 5 and 6), and corresponds to the light-emitting side housing portion 51 of the smoke detector base 5 in the assembled sensor 100. It is the part provided in the position.
　受光側収容部３３は、受光側光学素子７２２（図５及び図６）を収容する部分であり、組み立てられた状態の感知器１００において、検煙部ベース５の受光側収容部５２に対応する位置に設けられている部分である。 The light receiving side housing portion 33 is a portion for housing the light receiving side optical element 722 (FIGS. 5 and 6), and corresponds to the light receiving side housing portion 52 of the smoke detector base 5 in the sensor 100 in the assembled state. It is the part provided in the position.
（構成－検煙部カバーの詳細－傾斜側壁部）
　傾斜側壁部３４は、検煙部カバー３の側面側の一部を形成する部分であり、図１７及び図２１に示すように例えば、正面視において開口部３１を介して受光側収容部３３と対向する位置に設けられている部分である。傾斜側壁部３４は、例えば、正面視において検煙部カバー３の外周側から内側に向かうにつれて、正面側（図２０の図面下側）に向かうように傾斜している。 (Structure - Details of smoke detector cover - Inclined side wall)
The inclined side wall portion 34 is a portion forming part of the side surface of the smoke detector cover 3, and as shown in FIGS. These are the portions provided at opposing positions. The inclined side wall portion 34 is inclined, for example, toward the front side (lower side in FIG. 20) as it goes inward from the outer peripheral side of the smoke detection section cover 3 in a front view.
（構成－検煙部カバーの詳細－直角側壁部）
　直角側壁部３５は、検煙部カバー３の側面側の一部を形成する部分であり、図１８及び図２２に示すように例えば、組み立てられた状態の感知器１００において、検煙部ベース５の平板状の部分に対して直角になる部分である。直角側壁部３５は、受光側収容部３３の隣に設けられている部分である。 (Structure - Details of smoke detector cover - Right angle side wall)
The right-angled side wall portion 35 is a portion forming part of the side surface of the smoke detection section cover 3, and as shown in FIGS. It is the part that is perpendicular to the flat plate-like part of the The right-angled side wall portion 35 is a portion provided next to the light-receiving side accommodation portion 33 .
（構成－検煙部カバーの詳細－各壁部）
　第１壁部４１～第７壁部４７は、傾斜側壁部３４における内側の面において立設するように設けられている部分であり、また、相互に間隙を介して設けられている部分である。第１壁部４１～第７壁部４７は、例えば、組み立てられた状態の感知器１００において、検出空間３００の内部に設けられている。第１壁部４１～第７壁部４７は、検煙部カバー３と一体的に形成してもよいし、あるいは、検煙部カバー３とは別体として形成した上で、接着剤等を用いて固定してもよいが、本実施の形態では、一体的に形成されているものとする（調整部４８も同様とする）。 (Composition - Details of the smoke detector cover - Each wall)
The first wall portion 41 to the seventh wall portion 47 are portions provided so as to stand on the inner surface of the inclined side wall portion 34, and are portions provided with a gap between each other. . The first wall portion 41 to the seventh wall portion 47 are provided inside the detection space 300 in the assembled sensor 100, for example. The first wall portion 41 to the seventh wall portion 47 may be formed integrally with the smoke detection section cover 3, or may be formed separately from the smoke detection section cover 3 and then coated with an adhesive or the like. Although it may be fixed by using, in the present embodiment, it is assumed to be integrally formed (the same applies to the adjusting portion 48).
（構成－検煙部カバーの詳細－調整部）
　調整部４８は、後述する第４反射部４０４として機能する部分であり、例えば、直角側壁部３５にける内側の面に設けられている部分である。調整部４８は、図１８及び図２８に示すように例えば、多数の山部及び溝部の組み合わせにより形成されている。この調整部４８の山部及び溝部の傾斜及び高さ（又は深さ）については、例えば、調整部４８に照射された一部の出射光（一例としては、溝部に照射された出射光）を捕捉して受光部７２及び第２反射部４０２へ反射せず、且つ、照射された他の一部の出射光（一例としては、山部の頂部に照射された出射光）を第２反射部４０２に向けて拡散しつつ反射するように構成されている。なお、光が拡散する場合、当該光は減衰するものとして、以下説明する。 (Configuration - details of the smoke detector cover - adjustment part)
The adjusting portion 48 is a portion that functions as a fourth reflecting portion 404 to be described later, and is, for example, a portion provided on the inner surface of the right-angled side wall portion 35 . As shown in FIGS. 18 and 28, the adjusting portion 48 is formed, for example, by combining a large number of ridges and grooves. With regard to the inclination and height (or depth) of the ridges and grooves of the adjusting portion 48, for example, a part of the emitted light irradiated to the adjusting portion 48 (for example, the emitted light irradiated to the groove portion) is A part of the emitted light (for example, the emitted light emitted to the top of the peak) that is not captured and reflected to the light receiving unit 72 and the second reflecting unit 402 and is irradiated is reflected by the second reflecting unit It is configured to reflect while diffusing toward 402 . In the following description, it is assumed that the light is attenuated when the light is diffused.
（構成－検煙部カバーの詳細－第１反射部）
　第１反射部４０１は、検出空間３００内に設けられている部分であって、出射光が照射された場合に第２反射部４０２及び受光部７２に向けて出射光を反射しない部分である。第１反射部４０１は、図２８にハッチングで示されている部分であり、すなわち、第１壁部４１及び第３壁部４３によって取り囲まれている部分であり、第１壁部４１～第３壁部４３が設けられている部分である。第１反射部４０１は、例えば、出射光が照射された場合、当該出射光の一部を捕捉し、当該出射光の他の一部を第３反射部４０３に向けて拡散しつつ反射する。 (Configuration-details of smoke detector cover-first reflector)
The first reflecting portion 401 is a portion provided within the detection space 300 and is a portion that does not reflect emitted light toward the second reflecting portion 402 and the light receiving portion 72 when emitted light is irradiated. The first reflecting portion 401 is a portion shown by hatching in FIG. 28, that is, a portion surrounded by the first wall portion 41 and the third wall portion 43. This is the portion where the wall portion 43 is provided. For example, when emitted light is irradiated, the first reflecting section 401 captures part of the emitted light and reflects the other part of the emitted light while diffusing it toward the third reflecting section 403 .
　なお、「受光部７２に向けて出射光を反射しない」とは、例えば、受光部７２に向けて感知器１００の動作に影響を与える程度の光量の出射光を反射しないことを示す概念である。また、第１反射部４０１が出射光を反射するとは、例えば、第１反射部４０１に設けられている感知器１００の部材（例えば、第１壁部４１～第３壁部４３）が出射光を反射することを示す概念である。他の反射部に関する同様な表現も同様な概念であることとする。 It should be noted that the phrase "not reflecting emitted light toward the light receiving section 72" is a concept indicating, for example, not reflecting emitted light of an amount that affects the operation of the sensor 100 toward the light receiving section 72. . In addition, the first reflecting portion 401 to reflect the emitted light means, for example, that the emitted light is It is a concept that indicates that the Similar expressions regarding other reflecting portions are assumed to be similar concepts.
　また、図２８にハッチングで示されている第１反射部４０１に対応する領域が「所定領域」に対応するものと解釈してもよい。 Also, the area corresponding to the first reflecting part 401 indicated by hatching in FIG. 28 may be interpreted as corresponding to the "predetermined area".
（構成－検煙部カバーの詳細－第２反射部）
　第２反射部４０２は、検出空間３００内に設けられている部分であって、出射光が照射された場合に受光部７２に向けて出射光を反射する部分であり、第１反射部４０１とは異なる位置に設けられている部分である。第２反射部４０２は、図２８にハッチングで示されている部分であり、すなわち、第３壁部４３及び第６壁部４６によって取り囲まれている部分であり、第３壁部４３～第６壁部４６が設けられている部分である。第２反射部４０２は、例えば、受光部７２と対向する位置に設けられている部分である。 (Configuration-details of smoke detector cover-second reflector)
The second reflecting portion 402 is a portion provided within the detection space 300, and is a portion that reflects emitted light toward the light receiving portion 72 when emitted light is irradiated. are portions provided at different positions. The second reflecting portion 402 is the portion shown by hatching in FIG. 28, that is, the portion surrounded by the third wall portion 43 and the sixth wall portion 46. This is the portion where the wall portion 46 is provided. The second reflecting portion 402 is, for example, a portion provided at a position facing the light receiving portion 72 .
（構成－検煙部カバーの詳細－第３反射部）
　第３反射部４０３は、検出空間３００内に設けられている部分であって、出射光が照射された場合に第２反射部４０２及び受光部７２に向けて出射光を反射しない部分であり、第１反射部４０１とは異なる位置に設けられている部分である。第３反射部４０３は、図２８にハッチングで示されている部分であり、すなわち、第６壁部４６及び第７壁部４７によって取り囲まれている部分である。 (Configuration-details of smoke detector cover-third reflector)
The third reflecting portion 403 is a portion provided in the detection space 300, and is a portion that does not reflect emitted light toward the second reflecting portion 402 and the light receiving portion 72 when emitted light is irradiated, This portion is provided at a position different from that of the first reflecting portion 401 . The third reflecting portion 403 is a hatched portion in FIG. 28 , that is, a portion surrounded by the sixth wall portion 46 and the seventh wall portion 47 .
　第３反射部４０３は、例えば、正面視において第２反射部４０２を基準にして第１反射部４０１の反対側に設けられている部分である。すなわち、この第３反射部４０３及び前述の第１反射部４０１は、正面視において第２反射部４０２の両側各々に設けられている部分である。 The third reflecting part 403 is, for example, a part provided on the opposite side of the first reflecting part 401 with respect to the second reflecting part 402 when viewed from the front. That is, the third reflecting portion 403 and the above-described first reflecting portion 401 are portions provided on both sides of the second reflecting portion 402 when viewed from the front.
　第３反射部４０３は、例えば、出射光が照射された場合、当該出射光の一部を捕捉し、当該出射光の他の一部を第１反射部４０１に向けて拡散しつつ反射する。 For example, when emitted light is irradiated, the third reflecting section 403 captures part of the emitted light and reflects the other part of the emitted light while diffusing it toward the first reflecting section 401 .
（構成－検煙部カバーの詳細－第４反射部）
　第４反射部４０４は、検出空間３００内に設けられている部分であって、出射光が照射された場合に、照射された一部の出射光を捕捉して受光部７２及び第２反射部４０２へ反射せず、且つ、照射された他の一部の出射光を第２反射部４０２に向けて拡散しつつ反射する部分である。第４反射部４０４は、図２８に示すように調整部４８によって形成されている部分である。 (Configuration-details of smoke detector cover-4th reflector)
The fourth reflector 404 is a portion provided in the detection space 300, and when emitted light is irradiated, captures a part of the emitted light and 402 , and diffuses and reflects a part of the irradiated emitted light toward the second reflecting portion 402 . The fourth reflecting portion 404 is a portion formed by the adjusting portion 48 as shown in FIG.
　なお、第１反射部４０１～第４反射部４０４の４個の反射部、又は、これらの反射部を構成する感知器１００の各部材が、「内乱光処理部」に対応するものと解釈してもよいし、あるいは、第１反射部４０１及び第３反射部４０３のみ、又は、これらの反射部を構成する感知器１００の各部材のみが「内乱光処理部」に対応するものと解釈してもよい。 It should be noted that the four reflectors of the first reflector 401 to the fourth reflector 404, or each member of the sensor 100 that constitutes these reflectors, is interpreted as corresponding to the "instrumental light processing unit." Alternatively, only the first reflecting section 401 and the third reflecting section 403, or only each member of the sensor 100 that constitutes these reflecting sections, may be interpreted as corresponding to the "instrumental light processing section." may
　「内乱光処理部」とは、出射光に起因して検出空間３００内に発生する内乱光であって散乱光以外の内乱光を処理する部分であり、例えば、検出空間３００の内部に設けられているものである。 The “disturbance light processing unit” is a part that processes disturbance light other than scattered light that is generated in the detection space 300 due to emitted light. There is.
　「内乱光」とは、発光部７１から出射される出射光に起因する光の内の、煙粒子によって散乱される散乱光以外の光を示す概念であり、例えば、出射光自体又は反射した出射光等を含む概念である。 “Internal disturbance light” is a concept that indicates light other than scattered light scattered by smoke particles, among the light caused by the emitted light emitted from the light emitting unit 71. For example, the emitted light itself or the reflected emitted light This is a concept that includes incident light and the like.
　「内乱光を処理する」とは、内乱光の方向又は光量等を調整することを示す概念であり、例えば、内乱光を反射して拡散すること、あるいは、内乱光を捕捉して減衰させること等を含む概念である。 "Treatment of disturbance light" is a concept that indicates adjusting the direction or amount of disturbance light, for example, reflecting and diffusing disturbance light, or capturing and attenuating disturbance light. It is a concept that includes
（感知器に組み立て手順）
　次に、感知器１００の組み立て手順について説明する。ここでは、主に図５及び図６を参照しつつ、感知器１００の組み立て手順の一例について説明する。 (Assembly procedure for detector)
Next, the procedure for assembling the sensor 100 will be described. Here, an example of the procedure for assembling the sensor 100 will be described mainly with reference to FIGS. 5 and 6. FIG.
　まず、発光側光学素子７１２及び受光側光学素子７２２を、検煙部ベース５の発光側収容部５１（図２３及び図２６）及び受光側収容部５２に収容する。 First, the light emitting side optical element 712 and the light receiving side optical element 722 are housed in the light emitting side housing portion 51 (FIGS. 23 and 26) and the light receiving side housing portion 52 of the smoke detector base 5 .
　次に、検煙部カバー３を、検煙部ベース５に任意の手法（例えば、各構成要素に設けられている係合構造を利用する手法等）で取り付ける。この場合、発光側光学素子７１２及び受光側光学素子７２２は、検煙部カバー３の発光側収容部３２（図１９）及び受光側収容部３３にも収容されることになる。 Next, the smoke detection section cover 3 is attached to the smoke detection section base 5 by any method (for example, a method using an engaging structure provided on each component, etc.). In this case, the light emitting side optical element 712 and the light receiving side optical element 722 are also accommodated in the light emitting side accommodating portion 32 (FIG. 19) and the light receiving side accommodating portion 33 of the smoke detector cover 3 .
　次に、発光素子７１１、受光素子７２１、及び検出素子７００が実装されている基板６２（図４）を、端子盤６３の正面側（図６の図面上側）から当該端子盤６３に任意の手法（例えば、ネジで螺合する手法等）で取り付ける。また、嵌合金具６４を、端子盤６３の背面側（図６の図面下側）から当該端子盤６３に任意の手法（例えば、ネジで螺合する手法等）で取り付ける。 Next, the substrate 62 (FIG. 4) on which the light emitting element 711, the light receiving element 721, and the detection element 700 are mounted is attached to the terminal board 63 from the front side of the terminal board 63 (the upper side in FIG. 6). (For example, a method of screwing together with screws, etc.). Also, the fitting fitting 64 is attached to the terminal board 63 from the back side of the terminal board 63 (bottom side of the drawing in FIG. 6) by an arbitrary method (for example, a screwing method or the like).
　次に、検煙部カバー３が取り付けられた状態の検煙部ベース５を、基板６２の正面側（図６の図面上側）から当該基板６２に任意の手法（例えば、各構成要素に設けられている係合構造を利用する手法、又は、ネジで螺合する手法等）で取り付ける。 Next, the smoke detection unit base 5 with the smoke detection unit cover 3 attached is attached to the substrate 62 from the front side of the substrate 62 (the upper side of the drawing in FIG. 6) by any method (for example, the or a method of screwing with a screw, etc.).
　次に、内カバー２を、検煙部カバー３等が取り付けられている端子盤６３の正面側（図６の図面上側）から当該端子盤６３に任意の手法（例えば、各構成要素に設けられている係合構造を利用する手法等）で取り付ける。なお、この場合、検出素子７００の一部は、内カバー２の第２開口部２２（図１２）に挿通されて、図１に示すように、内カバー２から正面側に向かって突出することになる。 Next, the inner cover 2 is attached to the terminal board 63 from the front side (the upper side of the drawing in FIG. 6) of the terminal board 63 to which the smoke detection section cover 3 and the like are attached. (e.g., a method that uses an engagement structure that is In this case, part of the detection element 700 is inserted through the second opening 22 (FIG. 12) of the inner cover 2 and protrudes from the inner cover 2 toward the front side as shown in FIG. become.
　次に、防虫網６１を、内カバー２の第１開口部２１に設ける。 Next, an insect screen 61 is provided on the first opening 21 of the inner cover 2 .
　次に、外カバー１を、内カバー２等が取り付けられている端子盤６３の正面側（図６の図面上側）から当該端子盤６３に任意の手法（例えば、各構成要素に設けられている係合構造を利用する手法等）で取り付ける。なお、この場合、図１に示すように、外カバー１のラビリンス部１５は、内カバー２の突出部２３に当接することになる。また、ラビリンス部１５の区画壁１５１の一部（図１１において、外カバー１の中心で十字に交差している交差部分）によって、前述の防虫網６１が押さえられて当該防虫網６１が感知器１００に固定されることになる。このようにして、図１～図４に示す感知器１００の組み立てが完了する。 Next, the outer cover 1 is attached to the terminal board 63 from the front side (the upper side of the drawing in FIG. 6) of the terminal board 63 to which the inner cover 2 and the like are attached by an arbitrary method (for example, method using an engagement structure, etc.). In this case, as shown in FIG. 1, the labyrinth portion 15 of the outer cover 1 comes into contact with the projecting portion 23 of the inner cover 2. As shown in FIG. A part of the partition wall 151 of the labyrinth part 15 (in FIG. 11, the intersection crossing the center of the outer cover 1 in a crisscross pattern) presses the insect screen 61 described above, and the insect screen 61 becomes a sensor. It will be fixed at 100. Thus, the assembly of the sensor 100 shown in FIGS. 1-4 is completed.
（出射光の経路（内乱光の処理））
　次に、発光部７１から出射された出射光の経路について説明する。すなわち、各反射部による内乱光の処理について説明する。発光部７１からの出射光は、図２９及び図３０に矢印Ａ１～Ａ６で示すように例えば、第１反射部４０１及び第４反射部４０４に対して直接照射され、第２反射部４０２及び受光部７２へは直接は照射されない。なお、「直接照射される」とは、反射又は散乱されずに直接的に照射されることを示す概念である。 (Path of emitted light (treatment of disturbance light))
Next, the path of emitted light emitted from the light emitting section 71 will be described. That is, the processing of the internal disturbance light by each reflector will be described. The emitted light from the light emitting part 71 is directly irradiated to, for example, the first reflecting part 401 and the fourth reflecting part 404 as indicated by arrows A1 to A6 in FIGS. The portion 72 is not directly irradiated. Note that "directly irradiated" is a concept indicating direct irradiation without being reflected or scattered.
（出射光の経路－第１反射部に直接照射された出射光）
　そして、図２９に示すように、第１反射部４０１に直接照射された出射光の一部は、矢印Ａ２及びＡ４で示されるように、第１壁部４１及び第２壁部４２の相互間、又は第２壁部４２及び第３壁部４３の相互間に捕捉されて、他の反射部及び受光部７２には反射されないことになる。 (Path of emitted light - emitted light directly irradiated to the first reflecting part)
Then, as shown in FIG. 29, part of the emitted light that is directly applied to the first reflecting portion 401 is reflected between the first wall portion 41 and the second wall portion 42 as indicated by arrows A2 and A4. , or are caught between the second wall portion 42 and the third wall portion 43 and are not reflected by the other reflecting portion and the light receiving portion 72 .
　また、第１反射部４０１に直接照射された出射光の他の一部は、矢印Ａ１及びＡ３で示されるように、第１壁部４１又は第２壁部４２にて第３反射部４０３に向けて拡散しつつ反射される。この後、当該反射された出射光は、第３反射部４０３で捕捉、又は、第１反射部４０１に反射されて、第２反射部４０２、第４反射部４０４、及び受光部７２には反射されないことになる。 In addition, another part of the emitted light that is directly applied to the first reflecting section 401 is reflected by the first wall section 41 or the second wall section 42 to the third reflecting section 403 as indicated by arrows A1 and A3. It is reflected while diffusing toward it. After that, the reflected emitted light is captured by the third reflecting section 403 or reflected by the first reflecting section 401 and reflected by the second reflecting section 402, the fourth reflecting section 404, and the light receiving section 72. It will not be done.
（出射光の経路－第４反射部に直接照射された出射光）
　また、図３０に示すように、第４反射部４０４に直接照射された出射光の一部は、矢印Ａ６で示されるように、第４反射部４０４を形成する調整部４８の溝部に捕捉されて、他の反射部及び受光部７２には反射されないことになる。 (Path of emitted light - emitted light directly irradiated to the fourth reflecting section)
Further, as shown in FIG. 30, part of the emitted light that is directly applied to the fourth reflecting portion 404 is captured by the groove portion of the adjusting portion 48 that forms the fourth reflecting portion 404, as indicated by an arrow A6. Therefore, the light is not reflected by other reflecting portions and the light receiving portion 72 .
　また、第４反射部４０４に直接照射された出射光の他の一部は、矢印Ａ５で示されるように、第４反射部４０４を形成する調整部４８の山部の頂部にて第２反射部４０２に向けて拡散しつつ反射される。この後、当該反射された出射光は、第２反射部４０２の第３壁部４３にて受光部７２に向けて拡散しつつ反射される。 Another part of the emitted light that is directly applied to the fourth reflecting section 404 is secondly reflected at the top of the mountain portion of the adjusting section 48 that forms the fourth reflecting section 404, as indicated by an arrow A5. The light is diffused and reflected toward the portion 402 . Thereafter, the reflected emitted light is diffused and reflected toward the light receiving portion 72 by the third wall portion 43 of the second reflecting portion 402 .
　すなわち、この場合、発光部７１から出射された後に複数回反射されて拡散されることにより光量が比較的小さくなった出射光が、受光部７２にて受光されることになる。なお、ここでの光量については、煙粒子による散乱光の光量よりも十分小さくなっており当該散乱光の光量とは識別可能となっているために、所定周期で発光部７１から出射光を出射し、当該出射したタイミングに対応するタイミングで前述の光量が比較的小さくなった出射光を受光部７２で受光できたか否かに基づいて、感知器１００が正常に動作しているか否かを確認することが可能となる。 That is, in this case, the emitted light, which has been emitted from the light emitting portion 71 and is reflected and diffused multiple times to have a relatively small amount of light, is received by the light receiving portion 72 . Note that the amount of light here is sufficiently smaller than the amount of light scattered by the smoke particles, and can be distinguished from the amount of scattered light. Then, it is confirmed whether or not the sensor 100 is operating normally based on whether or not the light receiving unit 72 can receive the above-described emitted light with a relatively small amount of light at the timing corresponding to the emitted timing. It becomes possible to
（出射光の経路－検煙部ベース側）
　また、出射光の一部が検出空間３００内で検煙部ベース５に照射されることも想定されるが、この場合、検煙部ベース５に減衰部５３（図２３）が設けられているので、この減衰部５３にてこの照射された出射光を減衰させることができ、感知器１００を正常に動作させることが可能となる。 (Outgoing light path - smoke detector base side)
It is also assumed that part of the emitted light is irradiated to the smoke detector base 5 within the detection space 300. In this case, the smoke detector base 5 is provided with an attenuator 53 (FIG. 23). Therefore, the attenuating portion 53 can attenuate the emitted light, and the sensor 100 can be operated normally.
　なお、感知器１００が、図１に示すように天井９００に設置されている場合、検煙部ベース５の減衰部５３は、図２３に示すように例えば、垂直方向において下向きに向けられるので、減衰部５３の溝部に塵埃等が堆積することを防止し、当該塵埃等による乱反射発生を防止することが可能となる。 When the sensor 100 is installed on the ceiling 900 as shown in FIG. 1, the damping section 53 of the smoke detector base 5 is oriented vertically downward as shown in FIG. It is possible to prevent dust and the like from accumulating in the groove portion of the attenuation portion 53 and prevent the occurrence of irregular reflection due to the dust and the like.
（外乱光の入射防止）
　次に、外乱光の入射防止について説明する。図１において、感知器１００の外部の外乱光は、ラビリンス部１５の複数の区画壁１５１（図１１）によって遮られることになるので、検煙部カバー３の開口部３１を介する検出空間３００の内部へ外乱光の入射が防止されることになる。 (Prevention of incidence of disturbance light)
Next, prevention of incident disturbance light will be described. In FIG. 1, ambient light outside the sensor 100 is blocked by the plurality of partition walls 151 (FIG. 11) of the labyrinth section 15, so that the detection space 300 passes through the opening 31 of the smoke detection section cover 3. This prevents disturbance light from entering the interior.
（熱気流の供給）
　次に、監視領域で火災が発生した場合に生じる煙粒子を含む熱気流の、感知器１００への供給について説明する。 (supply of hot air)
The supply of a hot air stream containing smoke particles to the sensor 100 will now be described, which would occur if a fire were to occur in the monitored area.
　まず、図１において、監視領域で発生した熱気流は、外カバー１の開口部１４を介して、外カバー１の内部に流入する。 First, in FIG. 1, the hot airflow generated in the monitoring area flows into the outer cover 1 through the opening 14 of the outer cover 1 .
　次に、流入した熱気流の一部は、段部２３１の外周壁に沿って検出素子７００に供給される。また、流入した熱気流の他の一部は、ラビリンス部１５の複数の区画壁１５１の相互間の間隙１５２（図１１）を介して、感知器１００の外周側から内側へ供給され、内カバー２の第１開口部２１、及び検煙部カバー３の開口部３１を介して、検出空間３００に流入する。特に、内カバー２の第１開口部２１には防虫網６１（図６）が設けられているので、熱気流は、この防虫網６１の複数の小孔（不図示）を介して、検出空間３００に流入する。 Next, part of the hot airflow that has flowed in is supplied to the detection element 700 along the outer peripheral wall of the stepped portion 231 . Another part of the inflowing hot airflow is supplied from the outer peripheral side of the sensor 100 to the inside through the gaps 152 (FIG. 11) between the plurality of partition walls 151 of the labyrinth part 15, and is supplied to the inner cover. 2 and the opening 31 of the smoke detector cover 3 into the detection space 300 . In particular, since the first opening 21 of the inner cover 2 is provided with an insect screen 61 (FIG. 6), the hot airflow passes through a plurality of small holes (not shown) of the insect screen 61 and passes through the detection space. Flow into 300.
　ここで、内カバー２の第１開口部２１及び検煙部カバー３の開口部３１が円形となっているので、熱気流の流入方向に対する流入特性のばらつきが比較的小さく抑えられるために、検出空間３００に対してあらゆる方向からの熱気流を確実に流入させることが可能となる。 Here, since the first opening 21 of the inner cover 2 and the opening 31 of the smoke detector cover 3 are circular, variations in the inflow characteristics with respect to the inflow direction of the hot air flow can be suppressed relatively small. It is possible to reliably allow hot airflow to flow into the space 300 from all directions.
（火災検出の動作）
　次に、感知器１００による火災検出の動作について説明する。感知器１００は、例えば、受光部７２で受光した光の光量、又は、検出素子７００で検出した熱気流の温度に基づいて火災を検出する動作を行うが、この動作は、公知の動作を適用することができるので、概要のみ説明する。 (fire detection operation)
Next, the operation of fire detection by the sensor 100 will be described. The sensor 100 detects a fire based on the amount of light received by the light receiving unit 72 or the temperature of the hot air current detected by the detection element 700, for example. can be done, so only an overview will be given.
（火災検出の動作－火災を検出しない場合）
　例えば、監視領域で火災が発生していない場合、図２８の検出空間３００には煙粒子を含む熱気流が流入しないので、発光部７１から出射された後に第４反射部４０４及び第２反射部４０２で反射されて照射された比較的小さい光量の光を受光部７２が受光することになる。この場合、感知器１００は、火災を検出しない。 (Action of fire detection - when no fire is detected)
For example, when there is no fire in the monitoring area, the hot air current containing smoke particles does not flow into the detection space 300 of FIG. The light receiving section 72 receives a relatively small amount of light reflected by the light 402 and irradiated. In this case, the detector 100 will not detect fire.
　また、煙粒子を含む熱気流が検出素子７００に供給されないので、検出素子７００が検出した温度は常温レベルとなる。この場合、感知器１００は、火災を検出しない。 Also, since no hot air current containing smoke particles is supplied to the detection element 700, the temperature detected by the detection element 700 is at the room temperature level. In this case, the detector 100 will not detect fire.
（火災検出の動作－火災を検出する場合）
　一方、例えば、監視領域で火災が発生した場合、図２８の検出空間３００には煙粒子を含む熱気流が流入するので、発光部７１から出射された光が煙粒子に照射されて、比較的大きな光量の散乱光が発生して、当該散乱光を受光部７２が受光することになる。この場合、感知器１００は、火災を検出する。 (Fire Detection Operation - When Detecting Fire)
On the other hand, for example, when a fire breaks out in the monitoring area, a hot air flow containing smoke particles flows into the detection space 300 of FIG. A large amount of scattered light is generated, and the light receiving section 72 receives the scattered light. In this case, the detector 100 detects fire.
　また、例えば、煙粒子を含む熱気流が検出素子７００に供給され、検出素子７００が検出した温度が所定レベルまで上昇することになる。この場合、感知器１００は、火災を検出する。 Also, for example, a hot air current containing smoke particles is supplied to the detection element 700, and the temperature detected by the detection element 700 rises to a predetermined level. In this case, the detector 100 detects fire.
　なお、ここで説明した火災検出の動作は例示であり限定されるものではなく、より詳細には、以下の動作を行うように構成してもよい。 Note that the fire detection operation described here is an example and is not limited. More specifically, the following operations may be performed.
　例えば、受光部７２が比較的大きな光量を受光し、且つ、検出素子７００が検出した温度が所定レベルまで上昇した場合に火災を検出するように構成してもよいし、あるいは、受光部７２が比較的大きな光量を受光した場合に、検出素子７００が検出した温度に関わらず、火災を検出するように構成してもよい。 For example, the light receiving unit 72 may be configured to detect a fire when the light receiving unit 72 receives a relatively large amount of light and the temperature detected by the detecting element 700 rises to a predetermined level. It may be configured to detect a fire regardless of the temperature detected by the detection element 700 when a relatively large amount of light is received.
（実施の形態の効果）
　このように実施の形態によれば、出射光が照射された場合に受光部７２に向けて出射光を反射しない第１反射部４０１と、出射光が照射された場合に受光部７２に向けて出射光を反射する第２反射部４０２と、を備えており、発光部７１からの出射光は、第１反射部４０１に直接照射され、発光部７１からの出射光は、第２反射部４０２に直接照射されないことにより、例えば、発光部７１からの出射光が第２反射部４０２に直接照射されて当該出射光が受光部７２に照射されることを防止することができるので、検出空間３００に出射される光を適切に処理することが可能となる。例えば、火災に起因する煙粒子によって出射光が散乱されて生じる散乱光以外の比較的光量が大きな光を受光部７２が受光することを防止することができるので、火災の検出精度を向上させることが可能となる。 (Effect of Embodiment)
As described above, according to the embodiment, the first reflecting portion 401 that does not reflect the emitted light toward the light receiving portion 72 when the emitted light is irradiated, and the first reflecting portion 401 that reflects the emitted light toward the light receiving portion 72 when the emitted light is irradiated and a second reflecting portion 402 that reflects emitted light. For example, it is possible to prevent the emitted light from the light emitting unit 71 from directly irradiating the second reflecting unit 402 and the light receiving unit 72 from being irradiated with the emitted light. It is possible to appropriately process the light emitted to the . For example, it is possible to prevent the light receiving unit 72 from receiving light having a relatively large amount of light other than the scattered light generated by scattering emitted light by smoke particles caused by fire, thereby improving the fire detection accuracy. becomes possible.
　また、出射光が照射された場合に受光部７２に向けて出射光を反射しない第３反射部４０３を備え、第１反射部４０１は発光部７１から直接照射された出射光を第３反射部４０３に向けて反射することにより、例えば、第１反射部４０１に照射された出射光を拡散して減衰させることが可能となるので、散乱光以外の比較的光量が大きな光を受光部７２が受光することを防止することが可能となる。 Further, the third reflecting portion 403 is provided so as not to reflect the emitted light toward the light receiving portion 72 when the emitted light is emitted. By reflecting toward 403, for example, it is possible to diffuse and attenuate the emitted light irradiated to the first reflecting section 401, so that the light receiving section 72 receives light other than the scattered light, which has a relatively large amount of light. It is possible to prevent the light from being received.
　また、第２反射部４０２は受光部７２と対向する位置に設けられており、第１反射部４０１及び第３反射部４０３は第２反射部４０２の両側に各々設けられていることにより、例えば、検出空間３００に出射される光を適切に処理することが可能となる。 Further, the second reflecting section 402 is provided at a position facing the light receiving section 72, and the first reflecting section 401 and the third reflecting section 403 are provided on both sides of the second reflecting section 402, respectively. , the light emitted into the detection space 300 can be properly processed.
　また、照射された一部の出射光を捕捉して受光部７２及び第２反射部４０２へ反射せず、且つ、照射された他の一部の出射光を第２反射部４０２に向けて拡散しつつ反射する第４反射部４０４を備えることにより、例えば、散乱光以外の比較的光量が大きな光を受光部７２が受光することを防止することができるので、火災の検出精度を向上させることが可能となる。また、比較的光量が小さな光を受光部７２に受光させることができるので、当該光を利用して感知器１００の動作確認を行うことが可能となる。 Also, part of the emitted light that is emitted is captured and is not reflected to the light receiving part 72 and the second reflecting part 402, and another part of the emitted light that is emitted is diffused toward the second reflecting part 402. By providing the fourth reflecting part 404 that reflects while reflecting, for example, it is possible to prevent the light receiving part 72 from receiving light with a relatively large amount of light other than scattered light, so that the fire detection accuracy can be improved. becomes possible. In addition, since light having a relatively small amount of light can be received by the light receiving section 72, it is possible to check the operation of the sensor 100 using the light.
〔実施の形態に対する変形例〕
　以上、本発明に係る実施の形態について説明したが、本発明の具体的な構成及び手段は、特許請求の範囲に記載した各発明の技術的思想の範囲内において、任意に改変及び改良することができる。以下、このような変形例について説明する。 [Modification to Embodiment]
Although the embodiments according to the present invention have been described above, the specific configuration and means of the present invention can be arbitrarily modified and improved within the scope of the technical ideas of each invention described in the claims. can be done. Such modifications will be described below.
（解決しようとする課題や発明の効果について）
　まず、発明が解決しようとする課題や発明の効果は、前記した内容に限定されるものではなく、本発明によって、前記に記載されていない課題を解決したり、前記に記載されていない効果を奏することもでき、また、記載されている課題の一部のみを解決したり、記載されている効果の一部のみを奏することがある。 (Problem to be solved and effect of invention)
First, the problems to be solved by the invention and the effects of the invention are not limited to the above-described contents, and the present invention solves problems not described above or achieves effects not described above. and may solve only part of the problems described or provide only part of the advantages described.
（ラビリンス部について）
　上記実施の形態では、図８のラビリンス部１５が外カバー１に設けられる場合について説明したがこれに限らない。例えば、ラビリンス部１５を内カバー２に設けてもよい。具体的には、ラビリンス部１５を内カバー２と一体的に形成したり、あるいは、別個として形成されたラビリンス部１５を接着剤等を用いて内カバー２に固定したりして設けてもよい。 (Regarding the labyrinth part)
Although the case where the labyrinth portion 15 of FIG. 8 is provided on the outer cover 1 has been described in the above embodiment, the present invention is not limited to this. For example, the labyrinth portion 15 may be provided on the inner cover 2 . Specifically, the labyrinth portion 15 may be formed integrally with the inner cover 2, or the separately formed labyrinth portion 15 may be fixed to the inner cover 2 using an adhesive or the like. .
（調整部について）
　上記実施の形態では、図１８の調整部４８として、多数の山部及び溝部の組み合わせから成る構造を用いる場合について説明したが、これに限らない。例えば、調整部４８として、山部及び溝部を有さない平板状の部分として構成してもよい。この場合、発光部７１からの出射光は、平板状の部分において、入射角に対応する反射角で反射されることになることを考慮して、平板状の部分を以下のように構成してもよい。例えば、拡がりを有する出射光の一部が、平板状の部分で第２反射部４０２に向かって反射され、また、拡がりを有する出射光の他の一部が第１反射部４０１に向かって反射されるように構成することにより、受光部７２が比較的小さな光量の光を受光するように構成してもよい。 (Regarding the adjustment section)
In the above-described embodiment, the adjustment portion 48 of FIG. 18 has been described as having a structure composed of a combination of a large number of ridges and grooves, but the present invention is not limited to this. For example, the adjustment portion 48 may be configured as a flat plate-like portion that does not have a peak portion and a groove portion. In this case, the light emitted from the light emitting section 71 is reflected at the flat plate portion at a reflection angle corresponding to the angle of incidence, so the flat plate portion is configured as follows. good too. For example, part of the emitted light with spread is reflected toward the second reflecting section 402 by the plate-like portion, and another part of the emitted light with spread is reflected toward the first reflecting section 401 . The light receiving section 72 may be configured to receive a relatively small amount of light.
（外乱光処理部について）
　上記実施の形態では、ラビリンス部１５が外乱光処理部である場合について説明したが、これに限らない。例えば、ラビリンス部１５とは別体として、外乱光の検出空間３００への入射を防止するための防止部材を設けて、当該防止部材を外乱光処理部として用いてもよい。 (Regarding the ambient light processing unit)
Although the labyrinth unit 15 is the ambient light processing unit in the above embodiment, the present invention is not limited to this. For example, a prevention member for preventing disturbance light from entering the detection space 300 may be provided separately from the labyrinth section 15, and the prevention member may be used as the disturbance light processing section.
（組み合わせについて）
　上記実施の形態の特徴、及び変形例の特徴を任意に組み合わせてもよい。 (About combination)
The features of the above embodiment and the features of the modifications may be combined arbitrarily.
（付記）
　付記１の火災検出装置は、監視領域の火災を検出するための火災検出装置であって、前記火災に起因する検出対象が流入する検出空間と、前記検出対象を検出するための出射光を前記検出空間内に出射する発光部と、前記出射光が前記検出空間内の前記検出対象により散乱されて生じる散乱光を受光する受光部と、を備え、前記検出空間は、前記出射光が照射された場合に前記受光部に向けて前記出射光を反射しない第１反射部と、前記出射光が照射された場合に前記受光部に向けて前記出射光を反射する第２反射部であって、前記第１反射部とは異なる位置に設けられている前記第２反射部と、を備え、前記発光部からの前記出射光は、前記第１反射部に直接照射され、前記発光部からの前記出射光は、前記第２反射部に直接照射されない。 (Appendix)
The fire detection device of Supplementary Note 1 is a fire detection device for detecting a fire in a monitoring area, and includes a detection space into which a detection target caused by the fire flows and an emitted light for detecting the detection target. A light-emitting unit that emits light into a detection space, and a light-receiving unit that receives scattered light generated by the emitted light being scattered by the detection object in the detection space, wherein the detection space is irradiated with the emitted light. a first reflecting portion that does not reflect the emitted light toward the light receiving portion when the and the second reflecting portion provided at a position different from the first reflecting portion, wherein the emitted light from the light emitting portion is directly irradiated to the first reflecting portion, and the light emitted from the light emitting portion is directly irradiated to the first reflecting portion. The emitted light does not directly irradiate the second reflecting section.
　付記２の火災検出装置は、付記１に記載の火災検出装置において、前記検出空間は、前記出射光が照射された場合に前記受光部に向けて前記出射光を反射しない第３反射部であって、前記第１反射部とは異なる位置に設けられている前記第３反射部、を備え、前記第１反射部は、前記発光部から直接照射された前記出射光を、前記第３反射部に向けて反射する。 The fire detection device of Supplementary Note 2 is the fire detection device of Supplementary Note 1, wherein the detection space is a third reflecting portion that does not reflect the emitted light toward the light receiving portion when the emitted light is irradiated. and the third reflecting portion provided at a position different from the first reflecting portion, wherein the first reflecting portion reflects the emitted light directly emitted from the light emitting portion to the third reflecting portion. reflect towards.
　付記３の火災検出装置は、付記２に記載の火災検出装置において、前記第２反射部は、前記受光部と対向する位置に設けられており、前記第１反射部及び前記第３反射部は、前記第２反射部の両側に各々設けられている。 The fire detection device according to Supplementary Note 3 is the fire detection device according to Supplementary Note 2, wherein the second reflecting portion is provided at a position facing the light receiving portion, and the first reflecting portion and the third reflecting portion are , are provided on both sides of the second reflector.
　付記４の火災検出装置は、付記１から３の何れか一項に記載の火災検出装置において、前記検出空間は、前記出射光が照射された場合に、照射された一部の前記出射光を捕捉して前記受光部及び前記第２反射部へ反射せず、且つ、照射された他の一部の前記出射光を前記第２反射部に向けて拡散しつつ反射する第４反射部、を備え、前記発光部からの前記出射光は、前記第１反射部及び前記第４反射部に直接照射される。 The fire detection device of Supplementary Note 4 is the fire detection device according to any one of Supplementary Notes 1 to 3, wherein when the emitted light is irradiated, the detection space emits a part of the emitted light. a fourth reflecting portion that captures and does not reflect to the light receiving portion and the second reflecting portion and diffuses and reflects the other part of the emitted light that is irradiated toward the second reflecting portion; The emitted light from the light emitting section is directly irradiated to the first reflecting section and the fourth reflecting section.
（付記の効果）
　付記１に記載の火災検出装置によれば、出射光が照射された場合に受光部に向けて出射光を反射しない第１反射部と、出射光が照射された場合に受光部に向けて出射光を反射する第２反射部と、を備えており、発光部からの出射光は、第１反射部に直接照射され、発光部からの出射光は、第２反射部に直接照射されないことにより、例えば、発光部からの出射光が第２反射部に直接照射されて当該出射光が受光部に照射されることを防止することができるので、検出空間に出射される光を適切に処理することが可能となる。例えば、火災に起因する検出対象によって出射光が散乱されて生じる散乱光以外の比較的光量が大きな光を受光部が受光することを防止することができるので、火災の検出精度を向上させることが可能となる。 (Effect of Supplementary Note)
According to the fire detection device described in Supplementary Note 1, when the emitted light is irradiated, the first reflecting portion does not reflect the emitted light toward the light receiving portion, and when the emitted light is irradiated, the emitted light is emitted toward the light receiving portion. and a second reflecting portion that reflects the emitted light, and the light emitted from the light emitting portion is directly irradiated to the first reflecting portion, and the light emitted from the light emitting portion is not directly irradiated to the second reflecting portion. For example, it is possible to prevent the light emitted from the light emitting part from directly irradiating the second reflecting part and the light receiving part from being irradiated with the emitted light, so that the light emitted to the detection space can be appropriately processed becomes possible. For example, it is possible to prevent the light receiving unit from receiving light with a relatively large amount of light other than the scattered light generated by scattering the emitted light caused by the detection target caused by the fire, thereby improving the fire detection accuracy. It becomes possible.
　付記２に記載の火災検出装置によれば、出射光が照射された場合に受光部に向けて出射光を反射しない第３反射部を備え、第１反射部は発光部から直接照射された出射光を第３反射部に向けて反射することにより、例えば、第１反射部に照射された出射光を拡散して減衰させることが可能となるので、散乱光以外の比較的光量が大きな光を受光部が受光することを防止することが可能となる。 According to the fire detection device described in Supplementary Note 2, the third reflecting portion is provided so as not to reflect the emitted light toward the light receiving portion when the emitted light is irradiated, and the first reflecting portion is the light emitted directly from the light emitting portion. By reflecting the incident light toward the third reflecting portion, for example, it is possible to diffuse and attenuate the emitted light irradiated to the first reflecting portion. It is possible to prevent the light receiving section from receiving light.
　付記３に記載の火災検出装置によれば、第２反射部は受光部と対向する位置に設けられており、第１反射部及び第３反射部は第２反射部の両側に各々設けられていることにより、例えば、検出空間に出射される光を適切に処理することが可能となる。 According to the fire detection device described in Supplementary Note 3, the second reflector is provided at a position facing the light receiver, and the first reflector and the third reflector are provided on both sides of the second reflector. This makes it possible, for example, to properly process the light emitted into the detection space.
　付記４に記載の火災検出装置によれば、照射された一部の出射光を捕捉して受光部及び第２反射部へ反射せず、且つ、照射された他の一部の出射光を第２反射部に向けて拡散しつつ反射する第４反射部を備えることにより、例えば、散乱光以外の比較的光量が大きな光を受光部が受光することを防止することができるので、火災の検出精度を向上させることが可能となる。また、比較的光量が小さな光を受光部に受光させることができるので、当該光を利用して火災検出装置の動作確認を行うことが可能となる。 According to the fire detection device described in Supplementary Note 4, a part of the emitted light that is emitted is captured and is not reflected to the light receiving section and the second reflector, and the other part of the emitted light that is emitted is reflected to the second By providing the fourth reflecting portion that diffuses and reflects toward the second reflecting portion, for example, it is possible to prevent the light receiving portion from receiving light with a relatively large amount of light other than the scattered light, thereby detecting fire. It is possible to improve the accuracy. In addition, since light with a relatively small amount of light can be received by the light receiving section, it is possible to check the operation of the fire detection device using the light.
１　外カバー
２　内カバー
３　検煙部カバー
５　検煙部ベース
１１　本体部
１２　天板部
１３　接続部
１４　開口部
１５　ラビリンス部
２１　第１開口部
２２　第２開口部
２３　突出部
３１　開口部
３２　発光側収容部
３３　受光側収容部
３４　傾斜側壁部
３５　直角側壁部
４１　第１壁部
４２　第２壁部
４３　第３壁部
４４　第４壁部
４５　第５壁部
４６　第６壁部
４７　第７壁部
４８　調整部
５１　発光側収容部
５２　受光側収容部
５３　減衰部
６１　防虫網
６２　基板
６３　端子盤
６４　嵌合金具
７１　発光部
７２　受光部
１００　感知器
１５１　区画壁
１５２　間隙
２００　基部
２３０　長軸
２３０Ａ　短軸
２３１　段部
３００　検出空間
４０１　第１反射部
４０２　第２反射部
４０３　第３反射部
４０４　第４反射部
７００　検出素子
７１１　発光素子
７１２　発光側光学素子
７２１　受光素子
７２２　受光側光学素子
８０１　基準線
８０２　基準線
８０３　基準線
８０４　基準線
８０５　基準線
８０６　基準線
８０７　基準線
８０８　基準線
８０９　基準線
８１０　基準線
８１１　基準線
８１２　基準線
８１３　基準線
８１４　基準線
８１５　基準線
８１６　基準線
８１７　基準線
８１８　基準線
８１９　基準線
９００　天井
９０１　光軸
９０２　光軸
Ａ１　矢印
Ａ２　矢印
Ａ３　矢印
Ａ４　矢印
Ａ５　矢印
Ａ６　矢印 1 Outer cover 2 Inner cover 3 Smoke detector cover 5 Smoke detector base 11 Main body 12 Top plate 13 Connection 14 Opening 15 Labyrinth 21 First opening 22 Second opening 23 Projection 31 Opening 32 Light emission Side housing portion 33 Light receiving side housing portion 34 Inclined side wall portion 35 Right angle side wall portion 41 First wall portion 42 Second wall portion 43 Third wall portion 44 Fourth wall portion 45 Fifth wall portion 46 Sixth wall portion 47 Seventh wall Part 48 Adjusting part 51 Light-emitting side housing part 52 Light-receiving side housing part 53 Attenuation part 61 Insect screen 62 Board 63 Terminal board 64 Fitting fitting 71 Light-emitting part 72 Light-receiving part 100 Sensor 151 Partition wall 152 Gap 200 Base part 230 Long axis 230A Short Axis 231 Step 300 Detection space 401 First reflector 402 Second reflector 403 Third reflector 404 Fourth reflector 700 Detection element 711 Light emitting element 712 Light emitting side optical element 721 Light receiving element 722 Light receiving side optical element 801 Reference line 802 Reference line 803 Reference line 804 Reference line 805 Reference line 806 Reference line 807 Reference line 808 Reference line 809 Reference line 810 Reference line 811 Reference line 812 Reference line 813 Reference line 814 Reference line 815 Reference line 816 Reference line 817 Reference line 818 Reference line 819 Reference line 900 Ceiling 901 Optical axis 902 Optical axis A1 Arrow A2 Arrow A3 Arrow A4 Arrow A5 Arrow A6 Arrow

Claims (4)

  1. 　監視領域の火災を検出するための火災検出装置であって、
    　前記火災に起因する検出対象が流入する検出空間と、
    　前記検出対象を検出するための出射光を前記検出空間内に出射する発光部と、
    　前記出射光が前記検出空間内の前記検出対象により散乱されて生じる散乱光を受光する受光部と、を備え、
    　前記検出空間は、
    　　前記出射光が照射された場合に前記受光部に向けて前記出射光を反射しない第１反射部と、
    　　前記出射光が照射された場合に前記受光部に向けて前記出射光を反射する第２反射部であって、前記第１反射部とは異なる位置に設けられている前記第２反射部と、を備え、
    　前記発光部からの前記出射光は、前記第１反射部に直接照射され、
    　前記発光部からの前記出射光は、前記第２反射部に直接照射されない、
    　火災検出装置。     A fire detection device for detecting fire in a monitored area, comprising:
    a detection space into which the detection target caused by the fire flows;
    a light emitting unit that emits emitted light for detecting the detection target into the detection space;
    a light receiving unit that receives scattered light generated by the emitted light being scattered by the detection target in the detection space;
    The detection space is
    a first reflecting portion that does not reflect the emitted light toward the light receiving portion when the emitted light is irradiated;
    a second reflecting portion that reflects the emitted light toward the light receiving portion when the emitted light is irradiated, the second reflecting portion being provided at a position different from the first reflecting portion; with
    The emitted light from the light emitting unit is directly irradiated to the first reflecting unit,
    The emitted light from the light emitting unit is not directly irradiated to the second reflecting unit,
    Fire detection device.
  2. 　前記検出空間は、前記出射光が照射された場合に前記受光部に向けて前記出射光を反射しない第３反射部であって、前記第１反射部とは異なる位置に設けられている前記第３反射部、を備え、
    　前記第１反射部は、前記発光部から直接照射された前記出射光を、前記第３反射部に向けて反射する、
    　請求項１に記載の火災検出装置。     The detection space is a third reflecting portion that does not reflect the emitted light toward the light receiving portion when the emitted light is irradiated, and is provided at a position different from the first reflecting portion. 3 reflectors,
    The first reflecting section reflects the emitted light directly emitted from the light emitting section toward the third reflecting section,
    A fire detection device according to claim 1.
  3. 　前記第２反射部は、前記受光部と対向する位置に設けられており、
    　前記第１反射部及び前記第３反射部は、前記第２反射部の両側に各々設けられている、
    　請求項２に記載の火災検出装置。     The second reflecting section is provided at a position facing the light receiving section,
    The first reflector and the third reflector are provided on both sides of the second reflector,
    A fire detection device according to claim 2.
  4. 　前記検出空間は、
    　　前記出射光が照射された場合に、照射された一部の前記出射光を捕捉して前記受光部及び前記第２反射部へ反射せず、且つ、照射された他の一部の前記出射光を前記第２反射部に向けて拡散しつつ反射する第４反射部、を備え、
    　前記発光部からの前記出射光は、前記第１反射部及び前記第４反射部に直接照射される、
    　請求項１から３の何れか一項に記載の火災検出装置。     The detection space is
    When the emitted light is emitted, a portion of the emitted emitted light is captured and not reflected to the light receiving portion and the second reflecting portion, and another portion of the emitted emitted light is captured. A fourth reflecting portion that reflects while diffusing toward the second reflecting portion,
    The emitted light from the light emitting unit is directly irradiated to the first reflecting unit and the fourth reflecting unit,
    A fire detection device according to any one of claims 1 to 3.
PCT/JP2022/000118 2022-01-05 2022-01-05 Fire detection device WO2023132014A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04160697A (en) * 1990-10-25 1992-06-03 Matsushita Electric Works Ltd Light scattering type particle detecting sensor
JP2009015630A (en) * 2007-07-05 2009-01-22 Sharp Corp Photoelectric type smoke sensor and electronic device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04160697A (en) * 1990-10-25 1992-06-03 Matsushita Electric Works Ltd Light scattering type particle detecting sensor
JP2009015630A (en) * 2007-07-05 2009-01-22 Sharp Corp Photoelectric type smoke sensor and electronic device

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