Fire detection equipment

Abstract

Provided is a fire detection device that makes it easier to ensure the detection accuracy of a detection target.　A sensor 100 is a fire detection device attached to a ceiling surface 900, and includes: an inflow space 400 provided inside the sensor 100; a detection space 300 for detecting a detection target, the detection space 300 being provided at a position closer to the ceiling surface 900 than the inflow space 400 inside the sensor 100; an accommodation means for accommodating the detection space 300, the accommodation means being capable of allowing a gas containing the detection target to flow into and out of the detection space 300 through the inflow space 400; and an adjusting unit 15 for adjusting the flow velocity of the detection target flowing into the detection space 300, the adjusting unit 15 including a plurality of walls 151 provided in the inflow space 400.

Description

[Technical Field]

[0001] The present invention relates to a fire detection device. [Background technology]

[0002] Smoke detectors for determining the presence or absence of a fire based on the concentration of smoke have been proposed. Such smoke detectors include, for example, a detection space for detecting smoke, a smoke detection unit cover and a circuit board that surround the detection space, and an outer cover that covers the smoke detection unit cover and the circuit board. The outer cover includes a main body and a guide unit that guides external gases from various directions into the detection space through openings in the main body and the smoke detection unit cover (see, for example, Patent Document 1). This allows external gases, including smoke, to flow into the detection space, and the presence or absence of a fire can be determined based on the concentration of the smoke. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-046112 Summary of the Invention [Problem to be solved by the invention]

[0004] Here, in the above-mentioned conventional smoke detector, as mentioned above, the induction section induces external gas from various directions into the detection space through openings provided in the main body section and the smoke detection section cover. Therefore, for example, if the flow speed of the external gas differs depending on the direction in which the external gas flows in, the flow speed of the smoke contained in the external gas that flows into the detection space is likely to vary, which could reduce the accuracy of smoke detection. Therefore, there was room for improvement from the perspective of ensuring the accuracy of detection of detection targets such as smoke.

[0005] The present invention has been made in view of the above, and has an object to provide a fire detection device that makes it easier to ensure the detection accuracy of a detection target. [Means for solving the problem]

[0006] 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 that is attached to a predetermined installation surface, and is a fire detection device for detecting fires in a monitoring area, and has an inflow space provided inside the fire detection device, the inflow space allowing gas outside the fire detection device to flow in, and a detection space for detecting a detection target, and inside the fire detection device, a position closer to the installation surface than the inflow space Inside a detection space provided in the detection chamber; and a containing means for containing the detection space, the containing means being capable of causing the gas containing the detection target to flow into and out of the detection space via the inflow space; the accommodating means is configured to include an outer cover and an inner cover, the outer cover accommodates the inner cover, and includes a main body formed in a hollow shape, a top surface portion provided horizontally at a position opposite to the installation surface side of the main body and the inflow space, an inlet formed in a gap between the main body and the top surface portion for allowing gas to flow into the interior of the fire detection device and for allowing the gas to flow out from the interior of the fire detection device, and adjustment means consisting of a plurality of wall portions provided in the inflow space, for adjusting the flow rate of the detection target flowing into the detection space, and the inner cover accommodates the detection space and is configured to accommodate the detection space and for allowing gas to flow into the interior of the detection space and for allowing the gas to flow out from the interior of the fire detection device. The outer cover has a first opening for allowing the gas to flow out from inside the detection space, and the inflow space is provided in the space between the top surface and the inner cover within the internal space of the outer cover, and the multiple wall portions of the adjustment means are arranged upright and spaced apart from each other so as to form a labyrinth shape in which it is not possible to connect the outer end to the inner end of the space partitioned by the multiple wall portions within the inflow space in a straight line, and the gas flows into the interior of the outer cover through the inflow port of the outer cover, and a portion of the gas can flow into the detection space sequentially through the gaps between the multiple wall portions of the adjustment means in the inflow space and the first opening of the inner cover.

[0007] The fire detection device according to claim 2 is the fire detection device according to claim 1, At least some of the wall portions are arranged radially outward from a central portion of the inflow space.

[0008] The fire detection device according to claim 3 is the fire detection device according to claim 1 or 2, The plurality of wall portions include a cross wall portion where at least some of the plurality of wall portions cross each other at least in a central portion of the inflow space.

[0009] The fire detection device according to claim 4 is the fire detection device according to any one of claims 1 to 3, The storage means has a plurality of inlets for allowing the gas to flow into the inflow space, and the plurality of inlets and the plurality of wall portions are configured so that the relative positional relationship between the inlets and the wall portions corresponding to the inlets is the same for each of the plurality of inlets.

[0010] The fire detection device according to claim 5 is Claim 4 In the fire detection device described in The number of the wall portions is set to be an integral multiple of the number of the inlets.

[0011] The fire detection device according to claim 6 is Any one of claims 1 to 5 In the fire detection device described in The adjusting means is formed integrally with the containing means. [Effects of the Invention]

[0014] According to the fire detection device of claim 1, there is provided an inflow space provided inside the fire detection device, a detection space for detecting a detection target, the detection space being provided inside the fire detection device at a position closer to the installation surface than the inflow space, a containing means for accommodating the detection space and capable of allowing gas containing the detection target to flow into and out of the detection space via the inflow space, and an adjusting means consisting of a plurality of walls provided in the inflow space and for adjusting the flow rate of the detection target flowing into the detection space, so that even if the flow rate of the gas varies depending on the direction in which the gas flows into the inflow space, the flow rate of the detection target contained in the gas can be adjusted to a desired rate. Therefore, it is possible to avoid variations in the flow rate of the detection target flowing into the detection space, and it becomes easier to ensure the detection accuracy of the detection target. Furthermore, the multiple wall portions are arranged at intervals so that the space partitioned by the multiple wall portions in the inflow space is labyrinth-shaped, thereby forming the section in a labyrinth shape and effectively adjusting the flow rate of the detection object that flows into the inflow space.

[0015] According to the fire detection device of claim 2, At least some of the multiple wall sections are arranged radially outward from the central part of the inflow space, so that multiple spaces partitioned by the multiple wall sections can be formed radially, and therefore the flow rate of the detection target can be effectively adjusted even if the detection target flows into the inflow space from various directions.

[0016] According to the fire detection device of claim 3, The plurality of walls includes a cross wall portion where at least a portion of the plurality of walls cross at least in the central portion of the inflow space, so that a flow path for the detection target to flow from the outside of the fire detection device into the detection space can be secured in the inflow space, and stability at the time of installation of the adjustment means can be improved. Also, intrusion of moisture (e.g., steam) can be suppressed in the central portion of the inflow space, thereby improving moisture intrusion prevention.

[0017] According to the fire detection device of claim 4, The plurality of inlets and the plurality of wall portions are configured so that the relative positional relationship between the inlets and the corresponding wall portions is the same for each inlet, thereby making it possible to uniform the gas inflow characteristics at each inlet, thereby suppressing variations in the amount of gas flowing into each inlet and making it easier to ensure detection accuracy of the detection target.

[0018] According to the fire detection device of claim 5, Since the number of installed walls is an integer multiple of the number of installed inlets, it becomes easier to uniformize the number of installed walls corresponding to each inlet and the spacing between them, which makes it easier to uniformize the inflow of gas at each inlet.

[0019] According to the fire detection device of claim 6, Since the adjusting means is formed integrally with the housing means, the labor required to attach the adjusting means to the housing means can be eliminated compared to when the adjusting means is formed separately from the housing means, improving the ease of attachment of the adjusting means. In addition, the heat capacity of the adjusting means can be increased, improving the ability to prevent moisture from entering. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a side view of a sensor according to an embodiment of the present invention. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] 4 is a cross-sectional view taken along the line AA in FIG. 3. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] FIG. [Figure 10] FIG. [Figure 11] FIG. [Figure 12] FIG. [Figure 13] FIG. [Figure 14] FIG. [Figure 15] FIG. [Figure 16] FIG. [Figure 17] FIG. [Figure 18] FIG. [Figure 19] FIG. [Figure 20] FIG. [Figure 21] FIG. [Figure 22] FIG. [Figure 23] FIG. 2 is a perspective view of the smoke detection unit base. [Figure 24] FIG. 2 is a perspective view of the smoke detection unit base. [Figure 25] FIG. 2 is a side view of the smoke detection unit base. [Figure 26] FIG. 2 is a front view of the smoke detection unit base. [Figure 27] FIG. 2 is a rear view of the smoke detection unit base. [Figure 28] FIG. 2 is a diagram showing the inside of a detection space. [Figure 29] 2 is a cross-sectional view of FIG. 1 taken along line B-B. [Figure 30] FIG. 30 is a diagram showing the state of gas inflow, illustrating the area corresponding to FIG. 29. [Figure 31] FIG. 30 is a diagram showing the state of gas inflow, illustrating the area corresponding to FIG. 29. DETAILED DESCRIPTION OF THE INVENTION

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A fire detection device according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention is not limited to the embodiment.

[0024] [Basic Concept of the Embodiment] First, the basic concept of the fire detection device according to this embodiment will be described. The fire detection device is a device that is attached to a predetermined installation surface and is used to detect fires in a monitored area.

[0025] Here, in the embodiment, a "fire detection device" is a device that detects and alerts to a fire in a monitored area based on the detection results of a detection target, and is a concept that includes, for example, optical, electrical, and thermal fire detectors and fire alarms.

[0026] In addition, the term "predetermined installation surface" refers to the surface of the object on which the fire detection device is to be installed, and is a concept that includes, for example, the ceiling, wall, and floor surfaces of a building, but in the embodiment, it will be described as the ceiling surface of a room.

[0027] Furthermore, the term "monitored area" refers to an area that is the subject of monitoring by a fire detection device, and specifically refers to an indoor or outdoor area (for example, any space such as a room, stairwell, or corridor), but in the embodiment, it will be described as a room.

[0028] [Specific details of each embodiment] Next, specific details of the embodiment will be described.

[0029] (composition) First, the configuration of a sensor according to an embodiment will be described. Fig. 1 is a side view of a sensor according to an embodiment of the present invention, Fig. 2 is a perspective view of the sensor, Fig. 3 is a front view of the sensor, Fig. 4 is a cross-sectional view taken along line AA in Fig. 3, and Figs. 5 and 6 are exploded perspective views of the sensor. In each figure, elements of the sensor 100 related to the features of the present application are illustrated and explained using reference numerals, and elements other than those explained may have the same configuration as conventional sensors. In Fig. 4, hatching of cross sections has been omitted for ease of explanation (the same applies to other cross-sectional views).

[0030] Note that the X, Y, and Z axes in each drawing are assumed to be mutually orthogonal, with the Z axis indicating the vertical direction (i.e., the lengthwise or thickness direction when the sensor 100 is installed), with the -Z direction being referred to as the front side and the +Z direction being referred to as the rear side. Also, the description will be given assuming that the X and Y axes indicate the horizontal direction (i.e., the lateral or widthwise direction when the sensor 100 is installed). Also, in the XY plane of FIG. 3, the direction away from the center of the sensor 100 will be referred to as the outer periphery, and the direction approaching the center will be referred to as the inside.

[0031] Note that reference line 801 in Fig. 1 is a center line that passes through the center of sensor 100 and is parallel to the vertical direction of the drawing, and is shown for convenience of explanation. Note that reference lines in the other drawings are also shown for convenience of explanation. Reference line 802 in Fig. 1 is a center line that passes through the center of detection element 700 and is parallel to the vertical direction of the drawing. Reference line 803 is a line that indicates the same height position as the front-most position of protrusion 23 (i.e., the same height position as the front-most position of step 231).

[0032] 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 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.

[0033] 4 is a center line that passes through the center of the light receiving portion 72 and is parallel to the up-down direction in the drawing, and reference line 807 is a center line that passes through the center of the light receiving portion 72 and is parallel to the left-right direction in the drawing. Reference line 808 in Fig. 4 is a line that indicates the same height position as the base 200, and reference line 809 is a line that indicates the same height position as the front-most position of the protrusion 23 (that is, the same height position as the front-most position of the step portion 231).

[0034] Reference lines 810 and 811 in FIGS. 5 and 6 are center lines that pass through the center of the sensor 100 and are parallel to the vertical direction of the drawings.

[0035] The detector 100 is a fire detection device installed in a monitored area, for example, a device for detecting a fire in the monitored area, and is installed on a ceiling surface 900 (predetermined installation surface) of a room, as shown in FIG.

[0036] As shown in Figures 5 and 6, the detector 100 includes, for example, an outer cover 1, an inner cover 2, an inflow space 400, a detection space 300, a smoke detection unit cover 3, a smoke detection unit base 5, an insect screen 61 (Figure 6), a substrate 62, a terminal board 63, a fitting 64, a detection element 700, a light emitting unit 71, a light receiving unit 72, and a light guide 73.

[0037] (Configuration - Outer cover) 7 and 8 are perspective views of the outer cover 1, Fig. 9 is a side view of the outer cover 1, Fig. 10 is a front view of the outer cover 1, and Fig. 11 is a rear view of the outer cover 1. In each figure, for the sake of convenience, with respect to a plurality of similar components (for example, the connection portion 13, the inlet 14, etc. in Fig. 9), only some of the components will be denoted by reference numerals (the same applies to other components in other figures).

[0038] In addition, the reference lines 812 and 814 in Figures 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, and the reference lines 813 and 815 in Figures 10 and 11 are center lines that pass through the center of the outer cover 1 and are parallel to the horizontal direction of the drawing.

[0039] The outer cover 1 is part of the basic structure of the storage means and stores the inner cover 2 therein.

[0040] Here, the "container means" refers to a means for containing the detection space 300, and is capable of allowing gas containing the detection target to flow in and out of the detection space 300 via the inflow space 400, and in the embodiment, it is described as being configured with an outer cover 1 and an inner cover 2.

[0041] Furthermore, the term "detection target" refers to an object that is detected by the detector 100, specifically an object that occurs in association with a fire in the monitored area, and is a concept that includes, for example, smoke particles that occur in association with a fire.

[0042] The outer cover 1 is made of, for example, resin and includes, for example, a main body 11, a top surface 12, a connection portion 13, an inlet 14, an adjustment portion 15, and an opening 16 for a light guide, as shown in FIG.

[0043] (Configuration - Outer cover - Main body) The main body 11 is the basic structure of the outer cover 1. The main body 11 is formed in a hollow shape, and specifically, as shown in Figures 7 and 8, is formed in a substantially cylindrical shape with a predetermined diameter.

[0044] (Configuration - outer cover - top surface) The top surface portion 12 is a partitioning means for partitioning the inflow space 400. The top surface portion 12 is formed, for example, from a substantially circular plate-like body (for example, a circular flat plate-like body with a diameter smaller than the outer periphery of the main body portion 11), and is provided substantially horizontally at a position opposite to the ceiling surface 900 side of the main body portion 11 and the inflow space 400 (on the front side in FIG. 10), as shown in FIGS.

[0045] (Configuration - Outer cover - Connection part) The connection portion 13 is a portion that connects the main body portion 11 and the top surface portion 12 to each other, and is, for example, a portion that extends between the main body portion 11 and the top surface portion 12 as shown in FIG.

[0046] (Configuration - Outer cover - Inlet) Inlet 14 is an opening for allowing gas to flow into and out of sensor 100. Inlet 14 is formed in the gap between main body 11 and top surface 12, and is partitioned into multiple sections by multiple connection sections 13 (i.e., multiple inlets 14 are provided).

[0047] (Configuration - Outer cover - Adjustment part) The adjustment unit 15 is an adjustment means for adjusting the flow rate of the detection target flowing into the detection space 300. The configuration of the adjustment unit 15 will be described in detail later.

[0048] (Configuration - Outer cover - Light guide opening) The light guide opening 16 is a through opening for exposing the tip of the light guide 73 (FIGS. 5 and 6) to the outside of the detector 100.

[0049] (Configuration - Inner cover) 12 and 13 are perspective views of the inner cover 2, FIG. 14 is a side view of the inner cover 2, FIG. 15 is a front view of the inner cover 2, and FIG.

[0050] 15 and 16 indicates the major axis of the ellipse that is the circumferential shape of the protrusion 23 (FIG. 15), and also indicates the center line that passes through the center of the inner cover 2 and is parallel to the left-right direction in the drawing. The minor axis 230A in FIG. 15 and 16 indicates the minor axis of the ellipse that is the circumferential shape of the protrusion 23 (FIG. 15), and also indicates the center line that passes through the center of the inner cover 2 and is parallel to the up-down direction in the drawing.

[0051] The inner cover 2 is another part of the basic structure of the containing means and contains the detection space 300. The inner cover 2 is circular in front view and is made of, for example, resin. The inner cover 2 includes, for example, a first opening 21, a second opening 22, a protrusion 23, and an opening 24 for a light guide as shown in FIG. 12.

[0052] (Configuration - Inner cover - First opening) The first opening 21 is an opening for allowing gas to flow into the detection space 300 and for allowing the gas to flow out from the detection space 300. As shown in Fig. 15 , the first opening 21 is, for example, a circular opening provided in the center of the inner cover 2 when viewed from the front.

[0053] (Configuration - Inner cover - Second opening) The second opening 22 is an opening through which the detection element 700 is inserted and disposed. As shown in Fig. 15 , the second opening 22 is, for example, a rectangular opening that has an elliptical shape when viewed from the front and is provided on both sides of the protruding portion 23 on the major axis 230 of the protruding portion 23 (the major axis of the ellipse that is the circumferential shape of the outer peripheral wall 231A when viewed from the front).

[0054] (Configuration - Inner cover - Protrusion) The protruding portion 23 is a portion that protrudes toward the front side from the base portion 200 (FIGS. 12, 14, and 15) of the inner cover 2. As shown in FIG. 15, the protruding portion 23 has, for example, an elliptical shape when viewed from the front, and includes a step portion 231.

[0055] The step portion 231 is a part of the protrusion 23 and is a portion that protrudes and is higher than the base portion 200 .

[0056] (Configuration - Inner cover - Light guide opening) The light guide opening 24 is an opening through which the light guide 73 (FIGS. 5 and 6) is inserted and disposed.

[0057] (Configuration-Inflow space) The inflow space 400 is a space into which gas from outside the sensor 100 can flow in. This inflow space 400 is provided inside the sensor 100, and more specifically, as shown in FIG. 4, it is provided in the space between the top surface portion 12 and the inner cover 2 within the internal space of the outer cover 1.

[0058] (Configuration-detection space) The detection space 300 is a space for detecting a detection target. This detection space 300 is provided inside the detector 100 at a position closer to the ceiling surface 900 than the inflow space 400, and more specifically, as shown in Fig. 4, it is provided in the space within the inner cover 2 that is surrounded by the smoke detection unit cover 3 and the smoke detection unit base 5.

[0059] (Configuration - Smoke detector cover) 17 to 19 are perspective views of the smoke detection unit cover 3, FIG. 20 is a side view of the smoke detection unit cover 3, FIG. 21 is a front view of the smoke detection unit cover 3, and FIG. 22 is a rear view of the smoke detection unit cover 3.

[0060] The smoke detection unit cover 3, together with the smoke detection unit base 5, 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, i.e., it separates the inside and outside of the detection space 300. The smoke detection unit cover 3 is made of, for example, resin. As shown in Figs. 17 to 19, the smoke detection unit cover 3 includes, for example, an opening 31, a light-emitting side housing section 32, and a light-receiving side housing section 33.

[0061] (Configuration - Smoke detector cover - Opening) The opening 31 is an opening for allowing gas to flow into the detection space 300 and for allowing the gas to flow out from the detection space 300. The opening 31 is, for example, a circular opening as shown in FIG. 21 , and has approximately the same diameter as the first opening 21 of the inner cover 2.

[0062] (Configuration - Smoke detector cover - Each storage section) The light-emitting side accommodating portion 32 is a portion that accommodates the light-emitting side optical element 712 (FIGS. 5 and 6).

[0063] The light-receiving side housing portion 33 is a portion that houses the light-receiving side optical element 722 (FIGS. 5 and 6).

[0064] (Configuration - Smoke detector base) 23 and 24 are perspective views of the smoke detector base 5, FIG. 25 is a side view of the smoke detector base 5, FIG. 26 is a front view of the smoke detector base 5, and FIG. 27 is a rear view of the smoke detector base 5.

[0065] 21 is a center line that passes through the center of the smoke detection unit cover 3 and is parallel to the vertical direction of the drawing, and reference line 818 is a center line that is perpendicular to this. Optical axis 901 indicates the optical axis of the light-emitting unit 71 (FIG. 28) in the assembled detector 100. Optical axis 902 indicates the optical axis of the light-receiving unit 72 (FIG. 28) in the assembled detector 100. Reference line 817 in FIG. 22 is a center line that passes through the center of the smoke detection unit cover 3 and is parallel to the vertical direction of the drawing, and reference line 819 is a center line that is perpendicular to this.

[0066] 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, i.e., it separates the inside and outside of the detection space 300. The smoke detector base 5 is made of, for example, resin. The smoke detector base 5 is, for example, flat-plate shaped overall, and includes a light-emitting side housing section 51 (Figs. 23 and 26) and a light-receiving side housing section 52.

[0067] (Configuration - Smoke detector base - Each storage unit) The light-emitting side accommodating section 51 is a section that accommodates the light-emitting side optical element 712 (Figures 5 and 6), and is a section that is provided in a position corresponding to the light-emitting side accommodating section 32 of the smoke detection section cover 3 in the assembled state of the detector 100.

[0068] The light-receiving side accommodating section 52 is a section that accommodates the light-receiving side optical element 722 (Figures 5 and 6), and is a section that is provided in a position corresponding to the light-receiving side accommodating section 33 of the smoke detection section cover 3 in the assembled state of the detector 100.

[0069] (Composition - Insect net) 6 is intended to prevent insects from entering the detection space 300 (FIG. 4) while allowing gas to flow in and out of the detection space 300. The insect screen 61 is, for example, circular and provided at the first opening 21 of the inner cover 2, and is provided with a plurality of small holes (not shown) of a predetermined diameter that allow gas to flow in and out and prevent insects from entering.

[0070] (Configuration - Board) 5 and 6 is a circuit board on which an electric circuit including various elements, ICs, electric wiring, etc. is mounted. As shown in Fig. 6, for example, a light-emitting element 711 and a light-receiving element 721 are mounted on the front surface of the board 62. In addition to these elements, a detection element 700 is also mounted on the board 62.

[0071] (Configuration - terminal board) 5 and 6 covers the rear side of the components (smoke detection unit cover 3, etc.) of detector 100. Terminal board 63 is attached to ceiling surface 900 via fittings 64, i.e., it is an attachment part for attaching detector 100 to ceiling surface 900.

[0072] (Configuration - Fitting) The metal fitting 64 is detachably attached to the terminal board 63 and to an attachment structure on the ceiling surface 900 side (for example, an attachment structure that fits or engages with the metal fitting 64 to fix the metal fitting 64). By using this metal fitting 64, the sensor 100 including the terminal board 63 can be attached to the ceiling surface 900. It should be noted that the metal fitting 64 may be interpreted as corresponding to the "attachment portion."

[0073] Furthermore, although not shown in the embodiment, it is also possible to mount the sensor 100 on the ceiling surface 900 using a mounting base, which is a circular plate-shaped member having approximately the same diameter as the terminal board 63, and when this mounting base is used, the mounting base may be interpreted as corresponding to the "mounting portion." Note that the "mounting base" is a member that is provided between the sensor 100 and the ceiling surface 900 and that is used to install and mount the sensor 100 on the ceiling surface 900, but a known configuration can be applied, so detailed description will be omitted.

[0074] (Configuration - Detector element) The detection element 700 in FIGS. 5 and 6 is a thermal detection element that detects the heat of the gas that has flowed into the inflow space 400 .

[0075] The detection element 700 can be configured using, for example, a thermistor 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 inserted into the second opening 22 of the inner cover 2 shown in Fig. 12, with a portion of the detection element 700 protruding from the front side of the inner cover 2. Note that the detection element 700 does not necessarily have to be installed; if it is installed, it will be operated as a combined smoke and heat detector, and if it is not installed, it will be operated as a smoke-only detector.

[0076] (Configuration - Light-emitting part) Figure 28 is a diagram showing the inside of the detection space 300. Note that Figure 28 shows the inside of the smoke detection unit cover 3 as seen from the front side of the assembled detector 100, and the detailed structure of the smoke detection unit base 5 is omitted for ease of explanation.

[0077] 28 is a light emitting means that emits light for detecting smoke particles, which are the detection target, into the detection space 300. The light emitting unit 71 includes, for example, a light emitting element 711 and a light emitting side optical element 712, as shown in FIGS.

[0078] (Configuration - Light-emitting part - Light-emitting element) The light emitting element 711 is a component that emits light (emitted light), and can be configured using, for example, a light emitting diode (LED). The light emitting element 711 is mounted on the substrate 62.

[0079] (Configuration - Light-emitting part - Light-emitting optical element) The light-emitting side optical element 712 is a component that guides the light emitted by the light-emitting element 711 into the detection space 300 and emits it therefrom, and can be configured using, for example, a prism. The light-emitting side optical element 712 is housed in the smoke detection unit cover 3 and the smoke detection unit base 5, for example.

[0080] 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 detection unit base 5 (that is, a direction parallel to the XY plane in FIG. 3).

[0081] (Configuration - light receiving section) 28 is a light receiving means that receives scattered light generated when emitted light is scattered by smoke particles, which are the detection target, in the detection space 300. The light receiving unit 72 includes, for example, a light receiving element 721 and a light receiving side optical element 722, as shown in FIGS.

[0082] (Configuration - Light receiving section - Light receiving element) The light receiving element 721 is a component that receives light (scattered light, etc.), and can be configured using a photodiode, for example. The light receiving element 721 is mounted on the substrate 62.

[0083] (Configuration - Light receiving section - Light receiving optical element) The light-receiving side optical element 722 is a component that guides light in the detection space 300 to the light-receiving element 721, and can be configured using, for example, a prism. The light-receiving side optical element 722 is housed in the smoke detection unit cover 3 and the smoke detection unit base 5.

[0084] The light-receiving side optical element 722 is configured to guide scattered light, etc. that has been scattered by smoke particles and entered the light-receiving side optical element 722 to the light-receiving element 721.

[0085] (Configuration - Light guide) 5 and 6 is a component that functions as an indicator light for the sensor 100, and as shown in FIGS. 2 and 3, for example, a portion of it is exposed on the front side of the sensor 100. For example, if a light-emitting element (LED) separate from the light-emitting-side optical element 712 is provided on the front surface of the substrate 62, the light guide 73 is a component that guides light from this light-emitting element and outputs it to the front side of the sensor 100. The "indicator light" is a component that displays the state of the sensor 100, and, for example, outputs light of a color (e.g., green or red) that corresponds to the state of the sensor 100 to display the state of the sensor 100.

[0086] (Configuration - Other - Gas Sensor) In addition to the above configuration, a gas sensor (for example, a CO gas sensor) for detecting fire gas may be installed.

[0087] (Configuration - Details of the adjustment section configuration) Next, a detailed description will be given of the configuration of the adjustment unit 15. Fig. 29 is a cross-sectional view taken along line BB in Fig. 1.

[0088] The features of the adjustment unit 15 in this embodiment are as follows: However, unless otherwise specified, the adjustment unit 15 can be manufactured in any shape, by any method, and with any material.

[0089] (Configuration - Details of the configuration of the adjustment unit - First feature) Regarding a first feature of the configuration of the adjustment unit 15, the adjustment unit 15 is composed of a plurality of wall portions 151 provided in the inflow space 400. Moreover, as shown in FIGS. 1, 4, 8, 11, and 29, the plurality of wall portions 151 are provided so as to partition the inflow space 400, and include a first wall portion 161, a second wall portion 162, and a third wall portion 163.

[0090] (Configuration - Details of the configuration of the adjustment section - First feature - First wall section) The first wall portion 161 is a cross wall portion where four wall portions 161a to 161d (hereinafter referred to as the "first cross wall portion 161a," the "second cross wall portion 161b," the "third cross wall portion 161c," and the "fourth cross wall portion 161d") intersect in an approximately cross-like shape, and is provided at least in the central portion of the inflow space 400.

[0091] 11 and 29, the first wall portion 161 is configured so that inner ends of the first intersecting wall portion 161a, the second intersecting wall portion 161b, the third intersecting wall portion 161c, and the fourth intersecting wall portion 161d intersect with each other, and outer ends of the first intersecting wall portion 161a, the second intersecting wall portion 161b, the third intersecting wall portion 161c, and the fourth intersecting wall portion 161d are located at or near the outer edge of the step portion 231. Furthermore, the first wall portion 161 is arranged so that the side end portions 151A of the first intersecting wall portion 161a, the second intersecting wall portion 161b, the third intersecting wall portion 161c, and the fourth intersecting wall portion 161d are aligned along the outer periphery of the step portion 231 on the front side of the step portion 231.

[0092] 11, the first intersecting wall portion 161a, the second intersecting wall portion 161b, the third intersecting wall portion 161c, and the fourth intersecting wall portion 161d are each formed to have a substantially curved shape in a front view. This makes it easier to prevent the gas that has flowed into the inflow space 400 from flowing into the detection space 300 through the first opening 21 without coming into contact with the first intersecting wall portion 161a, the second intersecting wall portion 161b, the third intersecting wall portion 161c, or the fourth intersecting wall portion 161d.

[0093] Such first wall portion 161 can ensure a flow path in inflow space 400 for the detection target to flow from outside sensor 100 into detection space 300, and can also improve stability when mounting adjustment unit 15. Furthermore, it can prevent moisture (for example, steam) from entering the central portion of inflow space 400, improving moisture prevention.

[0094] (Configuration - Details of the configuration of the adjustment section - First feature - Second wall section) The second wall portions 162 are wall portions provided between the intersecting wall portions of the first wall portions 161, and a plurality of second wall portions 162 are provided in the inflow space 400.

[0095] 11 and 29, one second wall portion 162 is provided in each of four spaces defined by adjacent intersecting walls in the inflow space 400 (i.e., four second wall portions 162 are provided). Each second wall portion 162 is disposed such that a side end portion 151A of the second wall portion 162 is aligned along the outer periphery of the step portion 231 on the front side of the step portion 231.

[0096] Furthermore, the specific configuration of the second wall portion 162 is arbitrary, but in this embodiment, the second wall portion 162 is formed to have a substantially curved shape when viewed from the front, as shown in Fig. 11. This makes it easier to prevent gas that has flowed into the inflow space 400 from flowing into the detection space 300 through the first opening 21 without coming into contact with the second wall portion 162.

[0097] (Configuration - Details of the configuration of the adjustment section - First feature - Third wall section) The third wall portion 163 is a wall portion provided between the intersecting wall portion of the first wall portion 161 and the second wall portion 162, and a plurality of third wall portions 163 are provided in the inflow space 400.

[0098] 11 and 29, the third wall portion 163 is provided in each of eight spaces defined by the first intersecting wall portion 161a, the second intersecting wall portion 161b, the third intersecting wall portion 161c, or the fourth intersecting wall portion 161d and the second wall portion 162 (i.e., eight third wall portions 163 are provided). Each third wall portion 163 is disposed such that a side end portion 151A of the third wall portion 163 is aligned along the outer periphery of the step portion 231 on the front side of the step portion 231.

[0099] Furthermore, the specific configuration of the third wall portion 163 is arbitrary, but in the embodiment, the third wall portion 163 is formed to be substantially linear in front view as shown in Fig. 11. However, without being limited to this, for example, the third wall portion 163 may be formed to have a shape other than substantially linear in front view (for example, a substantially curved shape).

[0100] (Configuration - Details of the configuration of the adjustment unit - First feature - Other configurations) Furthermore, the method of installing the multiple wall portions 151 (specifically, the first wall portion 161, the second wall portion 162, and the third wall portion 163) is arbitrary, but in this embodiment, the multiple wall portions 151 are arranged at intervals from one another so that the space (specifically, the space S described below) defined by the multiple wall portions 151 in the inflow space 400 becomes labyrinth-shaped. Furthermore, at least some of the multiple wall portions 151 are arranged radially outward from the center of the inflow space 400.

[0101] Here, the term "labyrinth-like" refers to a shape in which the space partitioned by the plurality of walls 151 cannot be connected by a straight line from its outer end to its inner end.

[0102] 11 and 29, the first wall portions 161 are arranged such that the intersecting portions of the intersecting wall portions are located in the center of the inflow space 400, thereby forming a radial pattern. The second wall portions 162 are arranged spaced apart from the first wall portions 161 and radially extend outward from the center of the inflow space 400. The third wall portions 163 are arranged between the outer portions of the intersecting wall portions of the first wall portion 161 and the outer portions of the second wall portion 162, and are arranged at an inclination different from the inclination of the outer portions of the intersecting wall portions and the outer portions of the second wall portion 162 in a front view (i.e., they are arranged non-radially from the center of the inflow space 400 outward).

[0103] 11 , which is defined by an outer portion of either one of the cross wall portions of the first wall portion 161 or the second wall portion 162 and the third wall portion 163, and a space S2 of FIG. 11 , which is defined by an inner portion of either one of the cross wall portions of the first wall portion 161 or the second wall portion 162 and the other inner portion of either the cross wall portion of the first wall portion 161 or the second wall portion 162, can be formed into a labyrinth-like shape, thereby effectively adjusting the flow rate of the detection target that has flowed into the inflow space 400. Furthermore, because multiple spaces S can be formed radially, the flow rate of the detection target can be effectively adjusted even if the detection target flows into the inflow space 400 from various directions.

[0104] Furthermore, the method for forming the plurality of wall portions 151 (adjustment portion 15) is arbitrary, but in this embodiment, the plurality of wall portions 151 are formed integrally with the outer cover 1 or the inner cover 2.

[0105] Here, "integrally formed" is a concept that includes, for example, forming the adjustment unit 15 and the outer cover 1 (or inner cover 2) from a single member, and abutting the adjustment unit 15 and the outer cover 1 (or inner cover 2) so that they are in close contact with each other, thereby enabling mutual heat transfer comparable to that achieved when they were formed as a single member (for example, forming them separately from the outer cover 1 and then fixing them using adhesive, etc.), but in the embodiment, the adjustment unit 15 and the outer cover 1 (or inner cover 2) will be described as being formed as a single member using the same resin material.

[0106] Specifically, as shown in FIG. 11, the multiple wall portions 151 are formed integrally with the top surface portion 12 of the outer cover 1, and the multiple wall portions 151 are arranged so as to protrude from the top surface portion 12 toward the rear side (more specifically, the multiple wall portions 151 are arranged upright so as to abut against the protruding portion 23).

[0107] This type of formation eliminates the need to attach the multiple wall portions 151 to the outer cover 1 or the inner cover 2, compared to when the multiple wall portions 151 are formed separately from the outer cover 1 or the inner cover 2, thereby improving the ease of attachment of the adjustment portion 15. Furthermore, the heat capacity of the adjustment portion 15 can be increased, which improves the ability to prevent moisture from entering.

[0108] The first feature described above makes it possible to adjust the flow velocity of the detection target contained in the gas to a desired velocity even when the gas flow velocity varies depending on the direction in which the gas flows into inflow space 400. This makes it possible to avoid variations in the flow velocity of the detection target that has flowed into detection space 300, making it easier to ensure the detection accuracy of the detection target.

[0109] (Configuration - Details of the adjustment section - Second feature) Next, as for the second feature of the configuration of the adjustment section 15, the multiple inlets 14 and the multiple wall sections 151 are configured so that the relative positional relationship between the inlets 14 and the wall sections 151 corresponding to the inlets 14 is the same for each of the multiple inlets 14.

[0110] Specifically, the multiple wall portions 151 are arranged so that the same number of wall portions 151 are installed corresponding to each inlet 14. More specifically, the multiple wall portions 151 are arranged so that three wall portions 151 are visible when looking into each inlet 14 from outside the sensor 100.

[0111] In this case, the method for setting the number of installed wall portions 151 is arbitrary, but in the embodiment, the number of installed wall portions 151 is set to an integer multiple of the number of installed inlets 14, from the viewpoint of easily making the gas inflow uniform at each inlet 14. Specifically, when the number of installed inlets 14 is 8, the number of installed wall portions 151 is set to 16.

[0112] Furthermore, the method for setting the sizes of the wall portions 151 and the inlets 14 is arbitrary, but in this embodiment, from the viewpoint of facilitating uniform gas inflow at each inlet 14, the lengths of the gaps between adjacent wall portions 151 among the plurality of wall portions 151 (specifically, the horizontal lengths of the gaps) are set to be approximately uniform, and the widths of each of the plurality of inlets 14 (specifically, the lengths of the inlets 14 in the horizontal direction (direction along the ceiling surface 900)) are set to be approximately uniform. Specifically, the length (maximum length) of the gaps between the adjacent wall portions 151 is set to be approximately 1 / 3 of the widths of each of the plurality of inlets 14.

[0113] This second feature makes it possible to make the gas inflow uniform at each inlet 14. This makes it possible to suppress variations in the amount of gas flowing in at each inlet 14, making it easier to ensure the detection accuracy of the detection object.

[0114] (Assembly procedure for detector) Next, a description will be given of a procedure for assembling the sensor 100. Here, an example of a procedure for assembling the sensor 100 will be described mainly with reference to FIGS.

[0115] 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.

[0116] Next, the smoke detector cover 3 is attached to the smoke detector base 5 by any method (for example, by using the engagement structure provided in each component). In this case, the light-emitting side optical element 712 and the light-receiving side optical element 722 are also housed in the light-emitting side housing portion 32 (FIG. 19) and the light-receiving side housing portion 33 of the smoke detector cover 3.

[0117] Next, the substrate 62 on which the light-emitting element 711, the light-receiving element 721, and the detecting element 700 are mounted is attached to the terminal board 63 from the front side (upper side in FIG. 6) of the terminal board 63 by any method (for example, by screwing in with screws, etc.). Also, the fitting 64 is attached to the terminal board 63 from the rear side (lower side in FIG. 6) of the terminal board 63 by any method (for example, by screwing in with screws, etc.).

[0118] Next, the smoke detector base 5 with the smoke detector cover 3 attached is attached to the substrate 62 from the front side of the substrate 62 (upper side of the drawing in Figure 6) using any method (for example, a method using the engagement structure provided in each component, or a method of screwing together with screws, etc.).

[0119] Next, the inner cover 2 is attached to the terminal board 63 from the front side (upper side in FIG. 6 ) of the terminal board 63 to which the smoke detection unit cover 3 and the like are attached, using any method (for example, a method that utilizes an engagement structure provided on each component). In this case, a part of the detection element 700 is inserted into the second opening 22 of the inner cover 2 and protrudes from the inner cover 2 toward the front side. In addition, the light guide 73 is inserted into the light guide opening 24 of the inner cover 2.

[0120] Next, the insect screen 61 is installed in the first opening 21 of the inner cover 2.

[0121] Next, the outer cover 1 is attached to the terminal board 63 from the front side (upper side in FIG. 6) of the terminal board 63 to which the inner cover 2 and other components are attached, using any method (for example, a method utilizing an engagement structure provided on each component). In this case, as shown in FIG. 1, the adjustment unit 15 abuts against the protrusion 23 of the inner cover 2. The first wall 161 of the adjustment unit 15 presses down on the insect screen 61, securing it to the sensor 100. The tip of the light guide 73 is exposed to the outside of the sensor 100 through the light guide opening 16 (FIG. 7) of the outer cover 1. In this manner, the assembly of the sensor 100 shown in FIGS. 1 to 4 is completed.

[0122] (Fire detection operation) Next, the operation of the detector 100 for detecting a fire will be described.

[0123] Sensor 100 performs an operation to detect a fire based on, for example, the amount of light received by light receiving unit 72 or the temperature of the gas detected by detection element 700, but this operation can be performed using a known operation, so only an outline will be explained. Furthermore, since sensor 100 is provided with two detection elements 700, it is configured to use the detection result of the detection element 700 that detected the higher temperature of the two detection elements 700.

[0124] (Fire detection operation - when no fire is detected) For example, if there is no fire in the monitored area, gas containing smoke particles does not flow into detection space 300 in Fig. 28, so scattered light is not generated based on the light emitted from light-emitting unit 71, and scattered light is not received by light-receiving unit 72. In this case, sensor 100 does not detect a fire.

[0125] Furthermore, since a relatively high-temperature gas is not supplied to the detection element 700, the temperature detected by the detection element 700 is at room temperature level. In this case, the detector 100 does not detect a fire.

[0126] (Fire detection operation - when detecting a fire) On the other hand, for example, if a fire breaks out in the monitored area, gas containing smoke particles will flow into detection space 300 in Fig. 28, and the light emitted from light-emitting unit 71 will be irradiated onto the smoke particles, generating a relatively large amount of scattered light, which will be received by light-receiving unit 72. In this case, sensor 100 will detect the fire. The inflow of gas into sensor 100 will be described in detail later.

[0127] Alternatively, for example, a gas with a relatively high temperature is supplied to the detection elements 700, and the temperature detected by at least one of the two detection elements 700 rises to a predetermined level. In this case, the detector 100 detects a fire.

[0128] The fire detection operation described here is an example and is not limiting. More specifically, the following operation may be performed.

[0129] For example, the light receiving unit 72 may be configured to detect a fire when it receives a relatively large amount of light and the temperature detected by the detection element 700 rises to a predetermined level, or the light receiving unit 72 may be configured to detect a fire when the temperature detected by the detection element 700 rises to a predetermined level, regardless of the light reception result of the light receiving unit 72.

[0130] (Gas inflow) Next, the flow of gas into the sensor 100 will be described.

[0131] 30 and 31 are diagrams showing the state of gas inflow, and show the region corresponding to FIG. 29. In these FIGS. 30 and 31, the gas flow is indicated by outline arrows. FIG. 30 illustrates a case in which gas is supplied toward the inside of sensor 100 from a direction corresponding to minor axis 230A of protrusion 23 (the minor axis of the ellipse that is the circumferential shape of outer peripheral wall 231A in front view). FIG. 31 illustrates a case in which gas is supplied toward the inside of sensor 100 from a direction shifted by a predetermined angle from minor axis 230A of protrusion 23.

[0132] First, in FIG. 1, when a fire breaks out, gas containing smoke particles is supplied to detector 100 along ceiling surface 900 and flows into outer cover 1 through inlet 14 of outer cover 1.

[0133] Next, a portion of the inflowing gas is guided along the outer peripheral wall 231A (FIG. 29) of the step portion 231 and supplied to the detection element 700. In this case, a portion of the gas is also guided by the side end portions 151A of the multiple wall portions 151 in the adjustment portion 15 arranged on the front side of the step portion 231 and supplied to the detection element 700.

[0134] Meanwhile, another portion of the inflowing gas overcomes the step portion 231 and is guided and supplied from the outer periphery side of the sensor 100 to the inside through the gaps 152 (FIG. 29) between the multiple wall portions 151 of the adjustment portion 15. Thereafter, another portion of the gas flows into the detection space 300 through the first opening 21 of the inner cover 2 and the opening 31 of the smoke detection portion cover 3 while coming into contact with the first wall portion 161, the second wall portion 162, and / or the third wall portion 163 of the adjustment portion 15. In this case, even if the flow velocity of the other portion of the gas differs depending on the direction of flow into inflow space 400 (for example, when the gas flow velocity shown in FIG. 30 differs from the gas flow velocity shown in FIG. 31 ), the smoke particles contained in the other portion of the gas come into contact with first wall portion 161, second wall portion 162, and / or third wall portion 163 of adjustment unit 15, thereby adjusting the flow velocity of the smoke particles to a desired velocity, and the smoke particles with the adjusted flow velocity flow into detection space 300. This makes it possible to avoid variations in the flow velocity of the smoke particles flowing into detection space 300, making it easier to ensure the accuracy of smoke particle detection. Note that, because an insect screen 61 ( FIG. 6 ) is provided at first opening 21 of inner cover 2, the other portion of the gas flows into detection space 300 through a plurality of small holes (not shown) in insect screen 61.

[0135] Here, as shown in Fig. 30, for example, when another portion of the gas is supplied toward the inside of sensor 100 from a direction corresponding to minor axis 230A, the other portion of the gas is guided and supplied as indicated by the white arrow in Fig. 30. Furthermore, as shown in Fig. 31, for example, when another portion of the gas is supplied toward the inside of sensor 100 from a direction shifted by a predetermined angle from minor axis 230A, the other portion of the gas is guided and supplied as indicated by the white arrow in Fig. 31.

[0136] (Effects of the embodiment) As described above, according to the embodiment, there is provided inflow space 400 provided inside sensor 100, detection space 300 for detecting the detection target, which is provided inside sensor 100 at a position closer to ceiling surface 900 than inflow space 400, containing means for accommodating detection space 300 and capable of causing gas containing the detection target to flow into and out of detection space 300 via inflow space 400, and adjustment unit 15 provided in inflow space 400 and consisting of multiple wall portions 151 and for adjusting the flow rate of the detection target flowing into detection space 300. Therefore, even if the flow rate of the gas varies depending on the direction in which the gas flows into inflow space 400, the flow rate of the detection target contained in the gas can be adjusted to a desired rate. This makes it possible to avoid variations in the flow rate of the detection target flowing into detection space 300, making it easier to ensure detection accuracy for the detection target.

[0137] Furthermore, the plurality of wall portions 151 are arranged at intervals so that the space partitioned by the plurality of wall portions 151 in the inflow space 400 becomes labyrinth-shaped, so that the section can be formed into a labyrinth shape, and the flow rate of the detection object that flows into the inflow space 400 can be effectively adjusted.

[0138] Furthermore, at least some of the multiple wall portions 151 are arranged radially outward from the central portion of the inflow space 400, so that multiple spaces partitioned by the multiple wall portions 151 can be formed radially, and therefore the flow rate of the detection target can be effectively adjusted even if the detection target flows into the inflow space 400 from various directions.

[0139] Furthermore, the multiple wall portions 151 include first wall portions 161 where at least some of the multiple wall portions 151 intersect in a substantially cross shape at least in the central portion of the inflow space 400, so that a flow path for the detection target to flow from outside the sensor 100 into the detection space 300 can be secured in the inflow space 400, and stability at the time of mounting the adjustment unit 15 can be improved. Furthermore, the intrusion of moisture (for example, steam, etc.) can be prevented in the central portion of the inflow space 400, and moisture intrusion prevention can be improved.

[0140] Furthermore, the plurality of inlets 14 and the plurality of wall portions 151 are configured so that the relative positional relationship between the inlets 14 and the wall portions 151 corresponding to the inlets 14 is the same for each of the plurality of inlets 14, thereby making it possible to uniform the inflow of gas at each inlet 14. This makes it possible to suppress variations in the amount of gas flowing into each inlet 14, making it easier to ensure the detection accuracy of the detection target.

[0141] Furthermore, since the number of installed wall portions 151 is an integer multiple of the number of installed inlets 14, it becomes easier to uniformize the number and spacing of installed wall portions 151 arranged corresponding to each inlet 14, which makes it easier to uniformize the inflow of gas at each inlet 14.

[0142] Furthermore, the length of the gaps between adjacent wall sections 151 among the multiple wall sections 151 is made approximately uniform, and the width of each of the multiple inlets 14 is made approximately uniform, so it is easier to uniform the number and spacing of the wall sections 151 arranged corresponding to each inlet 14, making it easier to make the inflow of gas at each inlet 14 even more uniform.

[0143] Furthermore, since the adjustment unit 15 is formed integrally with the housing means, the effort required to attach the adjustment unit 15 to the housing means can be eliminated compared to when the adjustment unit 15 is formed separately from the housing means, thereby improving the ease of attachment of the adjustment unit 15. Furthermore, since the heat capacity of the adjustment unit 15 can be increased, the ability to prevent moisture from entering can be improved.

[0144] [Modifications to the embodiment] Although the embodiments of the present invention have been described above, the specific configurations and means of the present invention can be modified and improved as desired within the scope of the technical ideas of the inventions set forth in the claims. Such modifications will be described below.

[0145] (About the problem to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and the present invention may solve problems that are not described above or achieve effects that are not described above, or may solve only some of the problems that are described or achieve only some of the effects that are described.

[0146] (About the detector) In the above embodiment, the sensor 100 has been described as including the detection element 700 and the second opening 22, but this is not limiting, and for example, the detection element 700 and the second opening 22 may be omitted.

[0147] (Regarding accommodation means) In the above embodiment, the storage means is described as being configured to include the outer cover 1 and the inner cover 2, but this is not limiting, and for example, the inner cover 2 may be omitted. In this case, the adjustment portion 15 may be formed integrally with the top surface portion 12 (or the main body portion 11) of the outer cover 1. Alternatively, the adjustment portion 15 may be formed separately from the outer cover 1 (however, multiple wall portions 151 may be formed continuously, etc.), and the adjustment portion 15 may be provided so as to fit into a groove portion provided in the top surface portion 12.

[0148] (Regarding the adjustment part) In the above embodiment, the case where the adjustment unit 15 in Fig. 8 is provided on the outer cover 1 has been described, but this is not limiting. For example, the adjustment unit 15 may be provided on the inner cover 2. Specifically, the adjustment unit 15 may be formed integrally with the inner cover 2, or the adjustment unit 15 may be formed separately and fixed to the inner cover 2 using an adhesive or the like.

[0149] In the above embodiment, the adjustment unit 15 is described as being formed integrally with the top surface 12 of the outer cover 1, but this is not limiting. For example, at least a portion of the adjustment unit 15 may be formed integrally with the main body 11 of the outer cover 1.

[0150] Furthermore, in the above embodiment, it has been described that the adjustment unit 15 has a first wall portion 161, a second wall portion 162, and a third wall portion 163, but this is not limited to this, and for example, it may have only one or two of the first wall portion 161, the second wall portion 162, or the third wall portion 163.

[0151] In the above embodiment, the first cross wall portion 161a, the second cross wall portion 161b, the third cross wall portion 161c, and the fourth cross wall portion 161d of the first wall portion 161 are each formed to have a substantially curved shape in a front view, but this is not limiting. For example, at least a portion of the first cross wall portion 161a, the second cross wall portion 161b, the third cross wall portion 161c, and the fourth cross wall portion 161d of the first wall portion 161 may be formed to have a linear shape in a front view.

[0152] Furthermore, in the above embodiment, the second wall portion 162 is described as being formed to be approximately curved when viewed from the front, but this is not limited thereto, and it may be formed, for example, to be linear when viewed from the front.

[0153] Furthermore, in the above embodiment, it has been described that at least some of the multiple wall portions 151 are arranged radially outward from the central portion of the inflow space 400, but this is not limiting. For example, the multiple wall portions 151 may all be arranged radially outward from the central portion of the inflow space 400. Alternatively, the multiple wall portions 151 may all be arranged non-radially outward from the central portion of the inflow space 400 (for example, they may be arranged side by side at intervals from each other in the direction along the X-axis (or Y-axis)).

[0154] Furthermore, in the above embodiment, the multiple inlets 14 and the multiple wall portions 151 are configured such that the relative positional relationship between the inlets 14 and the wall portions 151 corresponding to the inlets 14 is the same for all the multiple inlets 14. However, this is not limited to this. For example, the multiple inlets 14 and the multiple wall portions 151 may be configured such that the relative positional relationship is different for all the multiple inlets 14. In this case, for example, the number of installed wall portions 151 may be set so that it is not an integer multiple of the number of installed inlets 14. Furthermore, the lengths of the gaps between adjacent wall portions 151 among the multiple wall portions 151 may be set non-uniformly, and / or the widths of the multiple inlets 14 may be set non-uniformly.

[0155] (About the top surface) In the above embodiment, the top surface 12 is described as being formed of a substantially circular flat plate and being disposed substantially horizontally, but this is not limiting. For example, at least a portion of the top surface 12 may be configured to be inclined so that when water droplets formed by condensation of moisture by the adjustment unit 15 adhere to the top surface 12, the water droplets can flow down from the top surface 12.

[0156] As an example, the entire top surface 12 may be formed as a substantially circular flat plate, and the top surface 12 may be provided so as to be inclined relative to the horizontal direction. Alternatively, only a portion of the top surface 12 (for example, a portion other than the outer edge of the top surface 12 and its vicinity) may be provided so as to be inclined, and the top surface 12 may be provided so as to be substantially horizontal.

[0157] This makes it possible to prevent water droplets from accumulating on the top surface portion 12, and to prevent the function of the sensor 100 from being impaired by the water droplets.

[0158] (Regarding the outer wall) In the above embodiment, the peripheral wall 231A has an elliptical peripheral shape in a front view, i.e., the protrusion 23 has an elliptical peripheral shape in a front view. However, this is not limiting. For example, the peripheral wall 231A may be configured so that the peripheral shape in a front view is an ellipse other than a perfect circle. Even with this configuration, it is possible to suppress variations in the temperature of the gas detected by the detection element 700 depending on the direction in which the gas is supplied.

[0159] (About combinations) The features of the above-described embodiment and the features of the modifications may be combined in any manner.

[0160] (Addendum) The fire detection device of Appendix 1 is a fire detection device that is attached to a predetermined installation surface and is a fire detection device for detecting fires in a monitored area, and is equipped with an inflow space provided inside the fire detection device, into which gas outside the fire detection device can flow, a detection space for detecting a detection target, the detection space being provided inside the fire detection device at a position closer to the installation surface than the inflow space, a storage means for accommodating the detection space, the storage means being capable of allowing the gas containing the detection target to flow into and out of the detection space via the inflow space, and an adjustment means consisting of a plurality of wall portions provided in the inflow space, for adjusting the flow rate of the detection target flowing into the detection space.

[0161] In addition, the fire detection device of Appendix 2 is the fire detection device described in Appendix 1, in which the multiple wall portions are arranged at intervals from each other so that the space partitioned by the multiple wall portions within the inflow space is labyrinth-shaped.

[0162] Further, the fire detection device of Supplementary Note 3 is the fire detection device of Supplementary Note 1 or 2, wherein at least some of the plurality of wall portions are arranged radially outward from the center of the inflow space.

[0163] Furthermore, the fire detection device of Appendix 4 is a fire detection device described in any one of Appendixes 1 to 3, wherein the plurality of wall portions include cross wall portions in which at least some of the plurality of wall portions intersect in an approximately cross shape at least in the central portion of the inflow space.

[0164] Furthermore, the fire detection device of Appendix 5 is a fire detection device described in any one of Appendixes 1 to 4, wherein the storage means is provided with a plurality of inlets for allowing the gas to flow into the inflow space, and the plurality of inlets and the plurality of wall portions are configured so that the relative positional relationship between the inlets and the wall portions corresponding to the inlets is the same for each of the plurality of inlets.

[0165] Further, in the fire detection device of Supplementary Note 6, in the fire detection device of Supplementary Note 5, the number of the wall portions is an integer multiple of the number of the inlets.

[0166] In addition, the fire detection device of Appendix 7 is the fire detection device described in Appendix 6, wherein the length of the gaps between adjacent wall portions among the plurality of wall portions is made approximately uniform, and / or the width of each of the plurality of inlets is made approximately uniform.

[0167] Further, the fire detection device of Supplementary Note 8 is the fire detection device according to any one of Supplementary Notes 1 to 7, wherein the adjustment means is formed integrally with the accommodation means.

[0168] (Effect of supplementary notes) The fire detection device described in Supplementary Note 1 includes an inflow space provided inside the fire detection device, a detection space for detecting a detection target provided inside the fire detection device closer to the installation surface than the inflow space, a containing means for accommodating the detection space and capable of allowing gas containing the detection target to flow into and out of the detection space via the inflow space, and an adjusting means made up of multiple walls provided in the inflow space and for adjusting the flow rate of the detection target flowing into the detection space. Therefore, even if the flow rate of the gas varies depending on the direction in which the gas flows into the inflow space, the flow rate of the detection target contained in the gas can be adjusted to a desired rate. This makes it possible to avoid variations in the flow rate of the detection target flowing into the detection space, making it easier to ensure detection accuracy of the detection target.

[0169] According to the fire detection device described in Appendix 2, the plurality of wall sections are arranged at intervals so that the space partitioned by the plurality of wall sections in the inflow space is labyrinth-shaped, so that the section can be formed into a labyrinth shape and the flow rate of the detection object flowing into the inflow space can be effectively adjusted.

[0170] According to the fire detection device described in Appendix 3, at least some of the multiple wall sections are arranged radially outward from the central part of the inflow space, so that multiple spaces partitioned by the multiple wall sections can be formed radially, and therefore the flow rate of the detection target can be effectively adjusted even if the detection target flows into the inflow space from various directions.

[0171] According to the fire detection device described in Supplementary Note 4, the plurality of walls include cross walls in which at least some of the walls cross in a generally cross shape at least in the central portion of the inflow space, so that a flow path for the detection target to flow from outside the fire detection device into the detection space can be secured in the inflow space, and stability at the time of installation of the adjustment means can be improved. Also, intrusion of moisture (for example, steam, etc.) can be suppressed in the central portion of the inflow space, thereby improving moisture intrusion prevention.

[0172] According to the fire detection device described in Supplementary Note 5, the plurality of inlets and the plurality of wall portions are configured so that the relative positional relationship between the inlets and the wall portions corresponding to the inlets is the same for each inlet, thereby making it possible to make the inflow of gas at each inlet uniform. This makes it possible to suppress variations in the amount of gas flowing into each inlet, making it easier to ensure detection accuracy of the detection target.

[0173] According to the fire detection device described in Appendix 6, the number of installed wall sections is an integer multiple of the number of installed inlets, which makes it easier to uniformize the number and spacing of installed wall sections arranged corresponding to each inlet, making it easier to uniformize the inflow of gas at each inlet.

[0174] According to the fire detection device described in Appendix 7, the length of the gaps between adjacent wall sections among the multiple wall sections is made approximately uniform, and / or the width of each of the multiple inlets is made approximately uniform, which makes it easier to uniform the number and spacing of wall sections arranged corresponding to each inlet, thereby making it easier to further uniform the inflow of gas at each inlet.

[0175] According to the fire detection device described in Appendix 8, since the adjustment means is formed integrally with the storage means, the labor required to attach the adjustment means to the storage means can be eliminated compared to when the adjustment means is formed separately from the storage means, and the ease of attachment of the adjustment means can be improved. Furthermore, since the heat capacity of the adjustment means can be increased, the ability to prevent moisture intrusion can be improved. [Explanation of symbols]

[0176] 1 Outer cover 2 Inner cover 3 Smoke detector cover 5 Smoke detector base 11 Main body 12 Top section 13 Connection 14 Inlet 15 Adjustment part 16 Light guide opening 21 First opening 22 Second opening 23 Protrusion 24 Light guide opening 31 Opening 32 Light-emitting side housing section 33 Light receiving side housing 51 Light-emitting side housing section 52 Light receiving side housing 61 Insect net 62 PCB 63 Terminal board 64 Metal fittings 71 Light-emitting part 72 Light receiving part 73 Light Guide 100 sensors 151 Wall 151A side end 152 Gap 161 1st wall 161a First cross wall 161b Second cross wall 161c Third cross wall 161d Fourth cross wall 162 2nd wall section 163 Third wall 200 base 230 long axis 230A short shaft 231 Multilayered section 231A Peripheral wall 300 Detection Space 400 Inflow space 700 detector element 711 Light-emitting element 712 Light-emitting optical element 721 Photodetector 722 Light receiving optical element 801 Baseline 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 Baseline 816 Reference Line 817 Reference Line 818 Reference Line 819 Reference Line 900 Ceiling surface 901 optical axis 902 optical axis S space S1 space S2 space

Claims

1. A fire detection device that is attached to a predetermined installation surface and is used to detect fires in a monitored area, an inflow space provided inside the fire detection device, into which gas outside the fire detection device can flow; a detection space for detecting a detection target, the detection space being provided inside the fire detection device at a position closer to the installation surface than the inflow space; a containing means for containing the detection space, the containing means being capable of causing the gas containing the detection target to flow into and out of the detection space via the inflow space, The container means is configured to include an outer cover and an inner cover, The outer cover accommodates the inner cover and includes a hollow main body, a top surface provided horizontally at a position opposite the installation surface side from the main body and the inflow space, an inlet formed in the gap between the main body and the top surface for allowing gas to flow into the fire detection device and for allowing the gas to flow out from the fire detection device, and an adjustment means consisting of a plurality of wall portions provided in the inflow space for adjusting the flow rate of the detection target flowing into the detection space. the inner cover accommodates the detection space and includes a first opening for allowing gas to flow into the detection space and for allowing the gas to flow out from the detection space; The inflow space is provided in a space between the top surface portion and the inner cover in the internal space of the outer cover, the plurality of wall portions of the adjusting means are arranged to stand apart from one another at intervals so as to form a labyrinth shape in which a space partitioned by the plurality of wall portions in the inflow space cannot be connected in a straight line from an outer end to an inner end, The gas flows into the interior of the outer cover through the inlet of the outer cover, and a portion of the gas can flow into the detection space sequentially through gaps between the plurality of wall portions of the adjustment means in the inlet space and the first opening of the inner cover. Fire detection equipment.

2. At least a portion of the plurality of wall portions are arranged radially outward from the central portion of the inflow space, The fire detection device according to claim 1 .

3. The plurality of wall portions include a cross wall portion in which at least a portion of the plurality of wall portions cross in a cross shape at least in a central portion of the inflow space, 3. The fire detection device according to claim 1 or 2.

4. The storage means has a plurality of inlets for allowing the gas to flow into the inflow space, The plurality of inlets and the plurality of wall portions are configured so that the relative positional relationship between the inlets and the wall portions corresponding to the inlets is the same for each of the plurality of inlets. The fire detection device according to any one of claims 1 to 3.

5. The number of the wall portions is an integer multiple of the number of the inlets.

5. The fire detection device according to claim 4.

6. The adjusting means is formed integrally with the containing means. A fire detection device according to any one of claims 1 to 5.

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