Sensor and disaster prevention system

Abstract

To provide a sensor capable of detecting either one of smoke and heat and performing audible notification, and a disaster prevention system.SOLUTION: A sensor 1 comprises a housing 2, a smoke detection part 13, a heat detection part 14, and sound output part 15. The housing 2 is disposed on an installation surface of a structure. The smoke detection part 13 is disposed in the housing 2. The heat detection part 14 is disposed in the housing 2. The sound output part 15 is disposed in the housing 2.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure generally relates to a sensor and a disaster prevention system. More specifically, the present disclosure relates to a sensor having a housing and a detection unit and a disaster prevention system including the sensor. [Background technology]

[0002] Patent Document 1 discloses a fire alarm including a housing, a smoke detector, and a fire alarm. The smoke detector includes a light receiving element such as a photodiode that receives scattered light caused by smoke particles emitted by light irradiated from an infrared LED to the inside of an optical table, and receives the scattered light caused by the emission of the infrared LED. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-164691 A Summary of the Invention [Problem to be solved by the invention]

[0004] The fire alarm disclosed in Patent Document 1 determines that a fire has occurred by detecting smoke, so even if heat is being generated by the fire, it cannot determine that a fire has occurred unless smoke is detected.

[0005] An object of the present disclosure is to provide a sensor and a disaster prevention system that can detect either smoke or heat and issue an audio alert. [Means for solving the problem]

[0006] A detector according to one aspect of the present disclosure includes a housing, a smoke detection unit, a heat detection unit, and a sound output unit. The housing is disposed on an installation surface of a structure. The smoke detection unit is disposed inside the housing. The heat detection unit is disposed inside the housing. The sound output unit is disposed inside the housing.

[0007] A disaster prevention system according to an aspect of the present disclosure includes the sensor, a receiver, and a repeater. The receiver communicates with the sensor to receive detection results from the smoke detection unit and the heat detection unit. The repeater relays the communication between the sensor and the receiver. Effect of the Invention

[0008] According to the detector and disaster prevention system of the present disclosure, if either smoke or heat is detected, an audio alert can be issued. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a side view of a sensor according to one embodiment of the present disclosure. [Diagram 2] FIG. 2 is a bottom view of the sensor. [Diagram 3] FIG. 3 is an exploded perspective view of the sensor as viewed obliquely from above. [Figure 4] FIG. 4 is an exploded perspective view of the sensor as viewed obliquely from below. [Diagram 5] Fig. 5A is a plan view of the cover of the sensor, and Fig. 5B is a partially enlarged view of Fig. 5A. [Figure 6] 6A and 6B are plan and side views of the bottom plate unit of the cover portion of the same. [Figure 7] 7A and 7B are plan and side views of the middle plate unit of the cover portion of the same. [Figure 8] FIG. 8 is a side view illustrating the assembly of the cover portion. [Figure 9] FIG. 9 is a vertical sectional view of the cover portion of the same. [Figure 10] FIG. 10 is a bottom view of the main body of the sensor. [Figure 11] FIG. 11 is a plan view of the inside of the smoke detection unit of the detector. [Figure 12] FIG. 12 is a schematic diagram showing the configuration of a disaster prevention system including the above-mentioned sensor. [Figure 13] FIG. 13 is a block diagram of a sensor provided in the disaster prevention system. [Figure 14] FIG. 14 is a block diagram of a receiver included in the disaster prevention system. [Figure 15] FIG. 15 is a block diagram of a repeater included in the disaster prevention system. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The detector and the disaster prevention system including the detector of the present disclosure will be described with reference to the drawings. The drawings described in the following embodiments are schematic drawings, and the ratios of the sizes and thicknesses of the components in the drawings do not necessarily reflect the actual dimensional ratios.

[0011] (1) Overview The following provides an overview of the sensor 1 and disaster prevention system 5 according to the present disclosure.

[0012] The detector 1 according to the present disclosure is a disaster prevention device that issues an alarm when it detects smoke or heat generated by a fire, etc. In other words, when smoke or heat is generated during a disaster such as a fire, the detector 1 detects the smoke or heat and issues an alarm, for example, by outputting an alarm sound or linking with other devices via a communication function. The "disaster prevention device" referred to in the present disclosure is, for example, a device that is installed in a facility for the purpose of preventing disasters such as fires, preventing the spread of damage caused by disasters, or recovering from a disaster.

[0013] The sensor 1 is installed and used in a facility. In the present disclosure, an example is given of the sensor 1 being used in a non-residential facility such as a historical building, a hotel, an office building, a school, a welfare facility, a commercial facility, a theme park, a hospital, or a factory. Of course, the present disclosure is not limited to this example, and the sensor 1 may be used in a facility such as an apartment building or a detached house. The sensor 1 is installed in the facility, for example, in a room, a hallway, or a staircase of the facility, attached to a ceiling or a wall.

[0014] As shown in FIGS. 1 to 4, detector 1 includes a housing 2, a smoke detection unit 13, a heat detection unit 14, and a sound output unit 15. Housing 2 is disposed on an installation surface of a structure. Smoke detection unit 13 is disposed inside housing 2. Heat detection unit 14 is disposed inside housing 2. Sound output unit 15 is disposed inside housing 2.

[0015] 11 to 15, disaster prevention system 5 includes a sensor 1, a receiver 6, and a repeater 7. The receiver 6 communicates with the sensor 1 and receives detection results from the smoke detection unit 13 and the heat detection unit 14. The repeater 7 relays communication between the sensor 1 and the receiver 6.

[0016] In the detector 1 and disaster prevention system 5 of the present disclosure, if either smoke or heat is detected, an audio alert can be issued.

[0017] (2)Details (2-1) General Description Hereinafter, a detailed configuration of the sensor 1 and the disaster prevention system 5 according to one embodiment will be described with reference to FIGS.

[0018] As an example, detector 1 is a smoke detector that detects smoke, and detector 1 is described as being attached to the ceiling wall of a facility as a structure. Hereinafter, when detector 1 is attached to the ceiling wall, the direction perpendicular (orthogonal) to the ceiling surface (the underside of the ceiling wall, hereinafter referred to as the installation surface) is defined as the "vertical direction." Arrows indicating the "vertical direction" in the drawings are merely shown for the purpose of explanation and have no substance. However, these directions are not intended to limit the direction of use (mounting direction) of detector 1.

[0019] (2-2) Sensor 1 to 4, the sensor 1 includes a sensor base 11 attached to a structure, and a sensor main body 10 (a housing 2, described in detail below) attached to the sensor base 11. The sensor main body 10 is detachably attached to the sensor base 11. By attaching the sensor main body 10 to the sensor base 11, the sensor main body 10 is disposed on the installation surface of the structure.

[0020] The outer shell of the sensor 1 is formed by combining the housing 2 of the sensor main body 10 and the base cover 110 of the sensor base 11. The base cover 110 is fixed to the installation surface (here, the ceiling surface). However, strictly speaking, the base cover 110 is not directly fixed to the installation surface, but is indirectly fixed to the installation surface by being fixed to a mounting base (not shown) that is fixed to the installation surface.

[0021] (2-3) Sensor-based The sensor base 11 is attached to a structure, and the housing 2 is attached to it. As shown in Figs. 3 and 4, the sensor base 11 includes a base cover 110 that constitutes the outer shell of the sensor 1. The base cover 110 has an upper wall 111 and a side wall 112, and constitutes the sensor base 11. The upper wall 111 is a plate that is circular in plan view. That is, the upper wall 111 in this embodiment is a plate that has an annular shape in plan view.

[0022] The side wall 112 has a cylindrical shape extending downward from the peripheral edge of the top wall 111. The top wall 111 and the side wall 112 are integrally formed. The top wall 111 constitutes the top wall of the outer shell of the sensor 1. Hereinafter, the term "top wall" refers not only to the top wall 111 of the base cover 110 but also to the top wall of the sensor 1.

[0023] The side wall 112 is provided with a mounting portion 113 to which the sensor body 10 is attached.

[0024] (2-4) Sensor body The sensor main body 10 includes a housing 2, a detection unit 12, a sound output unit 15, and a light source unit 16 (see FIG. 9). The housing 2 forms the outer shell of the sensor 1. In this embodiment, the sensor 1 further includes a battery 17, but the battery 17 is an optional configuration and does not necessarily have to be included in the sensor 1.

[0025] (2-5) Housing The housing 2 is placed on the installation surface of the structure. As described above, the housing 2 is placed on the installation surface of the structure via the sensor base 11. The housing 2 has a circular shape in a plan view. The housing 2 is a molded product made of resin. The housing 2 has a main body portion 21, a cover portion 22, and a rear cover portion 23.

[0026] (2-6) Main body, rear cover The main body 21 has a main body support part 24 and a main body cylinder part 25. The main body support part 24 supports the weight of the detection part 12, the sound output part 15, the light source part 16, and the board 18 (circuit board). The main body support part 24 is composed of a member that is generally disk-shaped in a plan view.

[0027] Here, the direction away from the installation surface is defined as the first direction. That is, the first direction away from the installation surface is the direction of the normal to the installation surface, and since the installation surface is the ceiling surface, the first direction is downward (particularly, vertically downward) in this embodiment. Also, the direction parallel to the first direction (the direction extending in the first direction and the opposite direction) is defined as the first direction. Hereinafter, the first direction will be simply referred to as the up-down direction.

[0028] The main body tube portion 25 is configured of a tubular (particularly cylindrical) member that extends in the up-down direction and surrounds the main body support portion 24. The main body tube portion 25 covers the outside of the main body support portion 24 and the devices (detection portion 12, sound output portion 15, and light source portion 16) whose weight is supported by the main body support portion 24. The main body support portion 24 and the main body tube portion 25 are integrally formed.

[0029] A lower attachment portion 251 is formed at the lower end of the main body tubular portion 25 to which the cover portion 22 is detachably attached.

[0030] An attachment portion 231 is provided at the upper end of the rear cover portion 23 for detachably attaching the rear cover portion 23 to the sensor base 11. The rear cover portion 23 is attached to the main body portion 21 with screws 19.

[0031] (2-7) Cover part The cover portion 22 extends in a first direction (downward) from the main body portion 21. The cover portion 22 covers the main body portion 21 so that the lower surface of the main body portion 21 is not exposed downward. The cover portion 22 has a plurality of cover support portions 26, a middle plate 28, a bottom plate 27, and a light guiding member 29. The cover portion 22 has a first opening 203 that communicates a first space 201 (described later) with an external space. The cover portion 22 also has a second opening 204 that communicates a second space 202 (described later) with an external space.

[0032] (2-7-1) Cover support, middle plate, bottom plate The multiple cover support parts 26 extend in a first direction (downward) from the main body part 21. The multiple cover support parts 26 support the weight of the middle plate 28 at their intermediate parts in the up-down direction. The multiple cover support parts 26 also support the weight of the bottom plate 27 at their distal parts in the up-down direction. In other words, the cover support parts 26 support the middle plate 28 and the bottom plate 27 in a suspending manner.

[0033] The bottom plate 27 constitutes the lower surface of the sensor main body 10 (sensor 1). The bottom plate 27 has a circular shape in a plan view.

[0034] The middle plate 28 divides the space between the lower surface of the main body 21 and the upper surface of the bottom plate 27 (the internal space 20 of the cover part 22) in the vertical direction. The middle plate 28 has a circular shape similar to that of the bottom plate 27 in a plan view. The space between the bottom plate 27 and the middle plate 28, i.e., the space below the middle plate 28 in the internal space 20, is defined as a first space 201. The space between the middle plate 28 and the main body 21, i.e., the space above the middle plate 28 in the internal space 20, is defined as a second space 202. The length L1 in the first direction of the first space 201 is longer than the length L2 in the first direction of the second space 202 (see FIG. 1).

[0035] The middle plate 28 and the bottom plate 27 extend in a direction perpendicular to the up-down direction (horizontal direction).

[0036] The first space 201 is open to the external space on the side (towards the atmosphere) except for the portion where the cover support part 26 is arranged, and the portion that communicates the first space 201 with the external space is referred to as a first opening 203. The second space 202 is open to the external space on the side (towards the atmosphere) except for the portion where the cover support part 26 is arranged, and the portion that communicates the second space 202 with the external space is referred to as a second opening 204.

[0037] The middle plate 28 has a sound output hole 281 that communicates the first space 201 and the second space 202. The sound output hole 281 is a hole (opening) for propagating the sound emitted from the sound output unit 15 and propagated to the second space 202 to the first space 201. The sound propagated to the first space 201 via the sound output hole 281 propagates from the first opening 203 to the external space. The second space 202 has a surrounding wall 267 that surrounds the sound output path from the sound output unit 15 to the sound output hole 281. The surrounding wall 267 will be described later.

[0038] (2-7-2) Bottom plate unit, middle plate unit 3 to 5B, in this embodiment, the cover portion 22 has a bottom plate unit 41 and a middle plate unit 40. As shown in FIGS. 6A and 6B, the bottom plate unit 41 has an upper frame portion 42, a first portion 261 of the cover support portion 26, a middle frame portion 43, and a bottom plate 27.

[0039] The upper frame portion 42 has a circular ring shape in a plan view similar to that of the main body tubular portion 25. The upper frame portion 42 is formed with a main body attachment portion 421 that is detachably attached to a lower attachment portion 251 formed at the lower end portion of the main body tubular portion 25.

[0040] The first portion 261 of the cover support portion 26 constitutes a portion of the cover support portion 26 that is on the outer side when viewed from the center of the cover portion 22 in a plan view. As the first portion 261, a plurality of first portions 261 are formed around the center of the cover portion 22 (in the circumferential direction) in a plan view. In this embodiment, the eight first portions 261 are positioned at 45° intervals in the circumferential direction. The first portions 261 are formed integrally with the upper frame portion 42 so as to protrude downward from the upper frame portion 42.

[0041] The middle frame portion 43 has a circular ring shape in plan view that is the same shape as the upper frame portion 42. The weight of the inner edge portion of the middle frame portion 43 in plan view is supported by the middle portion in the up-down direction of the first portion 261. The middle frame portion 43 is disposed at the same position (i.e., the same height) as the middle plate 28 in the up-down direction. Moreover, the middle frame portion 43 is disposed outside the middle plate 28 when viewed from the center of the cover portion 22 in plan view.

[0042] The bottom plate 27 is supported in a suspended state by the lower end of the first portion 261. More specifically, the upper surface of the peripheral portion of the bottom plate 27 is connected to the lower end of the first portion 261 and is supported in a suspended state by the first portion 261. The upper frame portion 42, the first portion 261, the middle frame portion 43 and the bottom plate 27 which constitute the bottom plate unit 41 are integrally formed. The first portion 261 will be described in detail later.

[0043] As shown in FIGS. 7A and 7B, the middle plate unit 40 has a second portion 262 of the cover support portion 26 and a middle plate 28. The second portion 262 of the cover support portion 26 constitutes a portion of the cover support portion 26 that is on the inside when viewed from the center of the cover portion 22 in a plan view. As the second portion 262, a plurality of second portions 262 are formed in the circumferential direction when viewed from the plan view. In this embodiment, each of the eight second portions 262 is positioned at 45° intervals in the circumferential direction. The second portions 262 are formed integrally with the upper frame portion 42 so as to protrude downward from the upper frame portion 42. Details of the second portions 262 will be described later.

[0044] The weight of the outer edge of the middle plate 28 in plan view is supported by the middle portion in the up-down direction of the second portion 262. In this embodiment, the second portion 262 is disposed within the outer periphery of the middle plate 28 in plan view. The middle plate 28 is disposed at the same position as the middle frame in the up-down direction. Moreover, the middle plate 28 is disposed inside the middle frame when viewed from the center of the cover portion 22 in plan view.

[0045] (2-7-3) Light-guiding member 5A, 5B, and 8, light guide member 29 is configured by a member extending in a first direction. Light guide member 29 is formed of a transparent resin such as an acrylic resin, but may be made of a material other than resin such as glass, and the material of light guide member 29 is not limited. Light guide member 29 has a rectangular shape in a cross section (horizontal cross section) perpendicular to the up-down direction.

[0046] In this embodiment, a plurality of light guiding members 29 are provided in the circumferential direction of the housing 2. Specifically, two light guiding members 29 are each arranged at equal intervals in the circumferential direction of the outer edge part inside the housing 2, that is, at positions facing each other in the circumferential direction.

[0047] An end face of the light guiding member 29 on the installation surface side (upper side in this embodiment) becomes an incident surface 291 of the light emitted from the light source unit 16. In addition, an end face of the light guiding member 29 on the opposite side to the installation surface (lower side in this embodiment) becomes an exit surface 292 of the light entering the inside of the light guiding member 29. A portion of the surface of the light guiding member 29 other than the incident surface 291 and the exit surface 292 becomes a side surface 293 of the light guiding member 29. The light entering the inside of the light guiding member 29 from the incident surface 291 advances toward the exit surface 292 while being reflected by the side surface 293 of the light guiding member 29, and most of the light is emitted from the exit surface 292. In addition, a portion of the light entering the inside of the light guiding member 29 from the incident surface 291 is emitted from the side surface 293.

[0048] The incident surface 291 and the exit surface 292 are not covered by any other member and are exposed. As shown in Fig. 2 and Fig. 9, the exit surface 292 is exposed downward through a light guiding hole 271 formed in the bottom plate 27.

[0049] A side surface 293 of the light guiding member 29 is covered by the cover support portion 26. In the present embodiment, the cover support portion 26 has a first portion 261 and a second portion 262, and the light guiding member 29 is disposed between the first portion 261 and the second portion 262.

[0050] The first portion 261 has a first cover portion 263 that covers an outwardly facing surface 294 of the four side surfaces 293 of the rectangular light guide member 29 in a plan view. The second portion 262 has a second cover portion 264 that covers an inwardly facing surface 295 and two circumferentially facing surfaces 296 of the four side surfaces 293 of the rectangular light guide member 29 in a plan view. The internal space 20 of the second cover portion 264 becomes the storage space for the light guide member 29. The storage space for the light guide member 29 is open upward and downward, and the entrance surface 291 and the exit surface 292 of the light guide member 29 are not covered by the second portion 262. However, all of the four side surfaces 293 of the light guide member 29 are covered by the cover support portion 26. This prevents a part of the light emitted from the side surface 293 of the light guide member 29 from being irradiated into the housing 2 and further leaking out of the housing 2.

[0051] The light guide member 29 has an attachment portion 297 protruding from a surrounding portion at a part of the side surface 293. The second portion 262 of the middle plate unit 40 has a groove portion 266 into which the attachment portion 297 can be inserted. The attachment portion 297 of the light guide member 29 is inserted into the groove portion 266 of the second portion 262. Specifically, a rod-shaped attachment portion 297 protruding in the circumferential direction is provided on one of the two circumferential faces of the light guide member 29. The second portion 262 is integrally provided with a groove member 265 having a groove portion 266 therein and accommodating the attachment portion 297 so as to protrude in the circumferential direction. As a result, the second portion 262 does not have a portion that supports the lower surface (emission surface 292) of the light guide member 29, but can support the lower surface of the attachment portion 297 of the light guide member 29 on the inner surface of the groove member 265.

[0052] (2-8) Detection unit 3, 4, 9, and 10, the detection unit 12 is disposed inside the housing 2. In this embodiment, the detector 1 has, as the detection unit 12, a smoke detection unit 13 and a heat detection unit 14.

[0053] (2-9) Smoke detection unit The smoke detection unit 13 is disposed inside the housing 2. Specifically, the smoke detection unit 13 is disposed in the second space 202. As shown in FIG. 11, the smoke detection unit 13 has a detection cover 131. The detection cover 131 is tubular with a bottom and has a bottom wall 132. The bottom wall 132 is a plate member that is approximately circular in a plan view. In other words, the detection cover 131 has a cylindrical shape with a bottom. The lower end of the smoke detection unit 13 is inserted into a smoke detection unit hole 283 (see FIG. 3) formed in the middle plate 28.

[0054] The smoke detection space 130 is a space surrounded by the detection cover 131 inside the housing 2. The smoke detection unit 13 is disposed inside the housing 2 and detects smoke in the smoke detection space 130. The smoke detection unit 13 has a light emitting unit 134 and a light receiving unit 135, and is a photoelectric type. In this disclosure, the term "photoelectric type" refers to a method of detecting smoke using the light emitting unit 134 and the light receiving unit 135 based on the change in the amount of light reflected by the smoke in the smoke detection space 130 or the light passing through the smoke detection space 130. In this embodiment, the light emitting unit 134 outputs light toward the smoke detection space 130. The light receiving unit 135 is disposed at a position where the direct light from the light emitting unit 134 is not incident and where the scattered light from the smoke in the smoke detection space 130 is incident. As a result, when there is no smoke in the smoke detection space 130, the light receiving unit 135 does not receive the light output from the light emitting unit 134, and when there is smoke in the smoke detection space 130, the light receiving unit 135 receives light output from the light emitting unit 134 and scattered by the smoke (scattered light). Therefore, the detector 1 can detect smoke present in the smoke detection space 130 depending on the light receiving state of the light receiving unit 135. Also, the amount of light received by the light receiving unit 135 changes depending on, for example, the concentration of smoke in the smoke detection space 130 and the type of smoke (white smoke, black smoke, etc.). The light receiving unit 135 outputs an output signal corresponding to the amount of light received to the control circuit 181 on the board 18.

[0055] The detection cover 131 is provided with a plurality of inlets 133 through which smoke can flow into the inside of the detection cover 131 (i.e., the smoke detection space 130). Therefore, smoke can flow into the smoke detection space 130 from the outside of the detection cover 131 through the plurality of inlets 133.

[0056] In this embodiment, a labyrinth structure 136 is provided inside the detection cover 131. The labyrinth structure 136 is an assembly of multiple small pieces arranged in an annular shape inside the detection cover 131 around the circumferential direction of the detection cover 131 so as to surround the smoke detection space 130. The labyrinth structure 136 makes it possible for smoke to be taken into the smoke detection space 130 from the outside of the detection cover 131 through gaps between the multiple small pieces.

[0057] (2-10) Circuit Board 9, the sensor 1 has a substrate 18 (circuit board) and a plurality of electronic components including switches. The plurality of electronic components are mounted on the substrate 18. The light-emitting unit 134 and the light-receiving unit 135 of the smoke detection unit 13 are electrically connected to the conductor portion of the substrate 18.

[0058] The substrate 18 includes a control circuit 181 (see FIG. 13) that is composed of a plurality of electronic components. The control circuit 181 is provided on the substrate 18 and controls the light-emitting unit 134, the light-receiving unit 135, etc., and drives at least the light-emitting unit 134 and performs signal processing on the output signal of the light-receiving unit 135. In signal processing, the control circuit 181 judges the presence or absence of smoke in the smoke detection space 130 by comparing the amount of light received by the light-receiving unit 135 (the magnitude of the output signal) with a threshold value. When the amount of light received by the light-receiving unit 135 is equal to or greater than the threshold value, the control circuit 181 judges that smoke of a certain concentration or more exists in the smoke detection space 130. When the control circuit 181 judges that smoke of a certain concentration or more exists in the smoke detection space 130, it outputs an electric signal to an output unit (not shown) that is electrically connected to a conductor portion of the substrate 18 to drive the output unit.

[0059] (2-11) Heat detection unit As shown in FIGS. 3 and 4, the heat detection unit 14 is disposed inside the housing 2. Specifically, the heat detection unit 14 is disposed in the first space 201. A temperature sensor as the heat detection unit 14 is electrically connected to the conductor of the substrate 18. The temperature sensor is, for example, a lead-type thermistor that detects the heat of the gas that has flowed in from the first opening 203. The temperature sensor is connected to the lower surface side of the substrate 18. Specifically, the lead wire of the temperature sensor extends into the first space 201 through a lead wire insertion hole 282 formed in the middle plate 28, and the temperature sensor connected to the tip of the lead wire is located in the first space 201.

[0060] (2-12) Sound output section The sound output unit 15 is disposed inside the housing 2. Specifically, the sound output unit 15 is electrically connected to a conductor portion of the substrate 18.

[0061] The sound output unit 15 outputs sound upon receiving an electrical signal from the control circuit 181. That is, the sensor 1 outputs sound from the sound output unit 15 when the amount of light received by the light receiving unit 135 is equal to or greater than a threshold value. The sound output unit 15 is realized by a speaker or a buzzer that converts an electrical signal into sound. Specifically, the sound output unit 15 is electrically connected to a conductor portion of the substrate 18.

[0062] The sound emitted from the sound output unit 15 propagates to the second space 202, but since the sound output path from the sound output unit 15 to the sound output hole 281 is surrounded by the surrounding wall 267, the sound propagated to the second space 202 is unlikely to exit from the second opening 204. The sound propagated to the second space 202 and reaches the sound output hole 281 is propagated to the first space 201 via the sound output hole 281, and exits from the first opening 203 to the outside of the housing 2.

[0063] When sound is emitted from the first opening 203 to the outside of the housing 2, the sound pressure below the bottom plate 27 is higher than when sound is emitted from the second opening 204 to the outside of the housing 2. One of the reasons for this is that when sound is emitted from the second opening 204 to the outside of the housing 2, a part of the sound that has been emitted from the second opening 204 to the outside of the housing 2 enters the first space 201 from the first opening 203 and then exits again from the first opening 203. It is considered that this part of the sound that again exits from the first opening 203 is offset by a part of the sound that exits from the second opening 204, resulting in a lower sound pressure below the bottom plate 27.

[0064] Moreover, the surrounding wall 267 has a longitudinal direction, and the longitudinal direction of the surrounding wall 267 extends toward the smoke detection unit 3. The surrounding wall 267 functions as a guide that guides the smoke that has flowed into the second space 202 to the smoke detection unit 3.

[0065] (2-13) Light source section 9, the light source unit 16 is disposed inside the housing 2. A light emitting element constituting the light source unit 16 is electrically connected to a conductor portion of the substrate 18. The light emitting element is, for example, an LED (Light Emitting Diode), and is mounted on the lower surface side of the substrate 18 so as to be capable of emitting light downward.

[0066] (3) Disaster prevention system 12, the disaster prevention system 5 includes a sensor 1, a receiver 6, and a repeater 7. The receiver 6 communicates with the sensor 1 to receive the detection result by the detection unit 12. The repeater 7 relays the communication between the sensor 1 and the receiver 6.

[0067] In this embodiment, the receiver 6 and the repeater 7 are connected by a two-wire transmission line 51. The receiver 6 and the repeater 7 perform wired communication via the transmission line 51. However, the disaster prevention system 5 may be configured such that the receiver 6 and the repeater 7 perform wireless communication via radio waves.

[0068] The disaster prevention system 5 of this embodiment includes a plurality of repeaters 7 (three in the illustrated example). Also, a plurality of sensors 1 are registered with each of the plurality of repeaters 7.

[0069] The multiple repeaters 7 use different channels to wirelessly communicate with the sensor 1. Therefore, each sensor 1 wirelessly communicates only with a corresponding repeater 7 among the multiple repeaters 7.

[0070] (3-1) Receiver configuration As shown in FIG. 14, the receiver 6 includes a communication unit 61, a display unit 62, an operation unit 63, a voice input unit 64, a sound output unit 65, a processing unit 66, and a storage unit 67.

[0071] The communication unit 61 includes a communication interface for wired communication connected to the transmission line 51. The communication unit 61 is connected to a plurality of repeaters 7 via the transmission line 51.

[0072] The display unit 62 includes, for example, a liquid crystal panel display, an indicator lamp, a seven-segment display, etc. The display unit 62 is capable of displaying various types of information.

[0073] The operation unit 63 includes various devices that accept operations by a user of the disaster prevention system 5 (a facility manager).

[0074] The audio input unit 64 accepts input of sounds from the surrounding environment.

[0075] The sound output unit 65 includes, for example, a speaker, and outputs various sounds. For example, when the sound output unit 65 receives a fire signal from the detector 1, it outputs an artificial voice or a beep sound recorded in a memory.

[0076] The storage unit 67 stores various information and is a semiconductor memory such as a Read Only Memory (ROM), a Random Access Memory (RAM), or an Electrically Erasable Programmable Read Only Memory (EEPROM).

[0077] The processing unit 66 can be realized, for example, by a computer system including one or more processors (microprocessors) and one or more memories.

[0078] The processing unit 66 controls the operation of the receiver 6 .

[0079] The processing unit 66 receives a fire signal from the detector 1 via the repeater 7. That is, the processing unit 66 controls the communication unit 61 to communicate with the detector 1 and receive the result of detection of a disaster.

[0080] When the processing unit 66 detects an abnormality in the sensor 1, it causes the display unit 62 and the sound output unit 65 to give an alert.

[0081] (3-2) Repeater configuration As shown in FIG. 15, the repeater 7 includes a first communication unit 71, a second communication unit 72, a storage unit 73, and a processing unit 74.

[0082] The first communication unit 71 includes a communication interface for wireless communication with an external device (the sensor 1). The first communication unit 71 includes an antenna, a communication circuit, and the like.

[0083] The second communication unit 72 includes a communication interface for wired communication, which is connected to the transmission line 51. The second communication unit 72 is connected to the receiver 6 via the transmission line 51.

[0084] The storage unit 73 stores various information and is a semiconductor memory such as a ROM, a RAM, or an EEPROM.

[0085] The processing unit 74 can be realized, for example, by a computer system including one or more processors (microprocessors) and one or more memories.

[0086] The processing unit 74 controls the operation of the repeater 7. That is, the processing unit 74 controls the operations of the first communication unit 71, the second communication unit 72, and the storage unit 73.

[0087] The processing unit 74 controls the first communication unit 71 and the second communication unit 72 to receive a fire signal from a registered detector 1 and transmit the received fire signal to the receiver 6.

[0088] Moreover, the processing unit 74 of this embodiment controls the first communication unit 71 and the second communication unit 72 to receive abnormality information from the detector 1 and transmit the received abnormality information to the receiver 6.

[0089] Moreover, the processing unit 74 of this embodiment controls the first communication unit 71 and the second communication unit 72 to receive a command signal from the receiver 6 and transmit the received command signal to the sensor 1.

[0090] (3-3) Sensor configuration As shown in FIG. 13, the sensor 1 includes a detection unit 12, a communication unit 81, a storage unit 82, an operation unit 83, a notification unit 84 (sound output unit 15 in this embodiment), and a processing unit 85.

[0091] The communication unit 81 includes a communication interface for wireless communication with another device (the repeater 7 or another sensor 1).

[0092] The storage unit 82 stores various information and is a semiconductor memory such as a ROM, a RAM, or an EEPROM.

[0093] The operation unit 83 accepts operation input by the user. The operation unit 83 includes operation buttons and the like that are operated by the user. In this embodiment, the operation buttons include a notification button. When the notification button is pressed by the user, the sensor 1 notifies its own identification information.

[0094] The notification unit 84 notifies various types of information in response to control by a notification control unit 88 of the processing unit 85. When the disaster detection unit 86 detects the occurrence of a disaster, the notification unit 84 notifies the occurrence of the disaster.

[0095] In this embodiment, the alarm unit 84 includes a speaker. The alarm unit 84 in this embodiment outputs a sound to notify the occurrence of a disaster when the disaster detection unit 86 detects the occurrence of a disaster. The sound to notify the occurrence of a disaster includes a voice to notify the occurrence of a disaster and an alarm sound. Furthermore, the alarm unit 84 in this embodiment outputs a voice to notify the identification information when the abnormality detection unit 87 detects an abnormality. Because the alarm unit 84 notifies the identification information by voice, it is easier for the user to know which detector 1 is experiencing an abnormality.

[0096] The processing unit 85 can be realized, for example, by a computer system including one or more processors (microprocessors) and one or more memories.

[0097] The processing unit 85 controls the operation of the sensor 1 .

[0098] The processing unit 85 has a disaster detection unit 86 , an abnormality detection unit 87 , and a notification control unit 88 .

[0099] The disaster detection unit 86 determines, based on the physical quantity (or the amount of change therein) detected by the detection unit 12, whether or not a disaster such as a fire has occurred.

[0100] The abnormality detection unit 87 detects an abnormality related to the detector 1.

[0101] The abnormality detection unit 87 of the present embodiment determines whether or not the resistance value of the thermistor of the detection unit 12 is within a predetermined range, and detects an abnormality when the resistance value of the thermistor is not within the predetermined range.

[0102] The notification control unit 88 controls the operation of the notification unit 84. In the present embodiment, when the abnormality detection unit 87 detects an abnormality and a command signal is received from the receiver 6 via the repeater 7, the notification control unit 88 causes the notification unit 84 to notify the identification information.

[0103] (3-4) Operation of the disaster prevention system Next, the operation of the disaster prevention system 5 will be described.

[0104] When the detector 1 detects an abnormality related to itself, it transmits the abnormality information to the repeater 7. When the repeater 7 receives the abnormality information, it transmits the received abnormality information to the receiver 6. When the receiver 6 receives the abnormality information from the repeater 7, it detects that an abnormality has occurred in the detector 1 corresponding to the identification information included in the abnormality information. The receiver 6 transmits a command signal to the repeater 7 to cause the detector 1 in which the abnormality has occurred to make an announcement. When the repeater 7 receives a command signal from the receiver 6, it transmits the received command signal to the detector 1 that transmitted the abnormality information. When the detector 1 receives the command signal, it announces its own identification number.

[0105] The detector 1 periodically checks whether it is alive or not with the repeater 7. The detector 1 transmits a confirmation signal to the repeater 7. The repeater 7 does not transmit a response signal to the detector 1 because it has not received a confirmation signal from the detector 1. The detector 1 detects a communication abnormality because it does not receive a response signal even after a predetermined time has passed since it transmitted the confirmation signal.

[0106] As described above, the receiver 6 periodically checks whether the detector 1 is alive or not with the repeater 7. The receiver 6 transmits a confirmation signal to the repeater 7. When the repeater 7 receives the confirmation signal from the receiver 6, it transmits a response signal to the receiver 6. Here, since the repeater 7 has not been able to confirm whether the detector 1 is alive or not, it transmits a response signal including identification information of the detector 1 whose aliveness has not been confirmed to the receiver 6. When the receiver 6 receives the response signal, it detects a communication abnormality of the detector 1 based on the identification information included in the response signal. Then, the receiver 6 notifies the location within the facility where the detector 1 whose aliveness has not been confirmed is installed.

[0107] Through the notification from the detector 1, the user becomes aware that an abnormality has occurred in the detector 1 and the location within the facility where the detector 1 is installed. The user goes to the location where the detector 1 is installed and performs a predetermined operation on the operation unit 83. Upon receiving the predetermined operation on the operation unit 83, the detector 1 notifies the user of its own identification information. Based on the notification from the detector 1, the user can become aware of the detector 1 in which an abnormality has occurred.

[0108] (4) Variations Although the sensor 1 has been described as including a sensor body 10 and a sensor base 11, the sensor 1 does not necessarily have to include the sensor base 11.

[0109] The housing 2 is not limited to being a resin molded product, that is, the material of the housing 2 is not limited to being resin, and may be, for example, metal.

[0110] The shape of the base cover 110 does not have to be circular in plan view and is not particularly limited. The shape of the main body 21 does not have to be circular in plan view and is not particularly limited. In addition, the main body 21 does not have to be plate-shaped and may be, for example, frame-shaped or the like and is not particularly limited.

[0111] The base cover 110 may be fixed directly to the installation surface, in which case there is no need for a mounting base fixed to the installation surface.

[0112] The length of the first space 201 in the first direction may be the same as the length of the second space 202 in the first direction, or may be shorter than the length of the second space 202 in the first direction.

[0113] It is sufficient that at least a portion of the smoke detection unit 13 is disposed in the second space 202. For example, it is sufficient that a portion of the inlet 133 of the smoke detection unit 13 is disposed in the second space 202.

[0114] The middle plate 28 and the bottom plate 27 do not necessarily need to extend in a direction (horizontal direction) strictly perpendicular to the up-down direction.

[0115] The cross-sectional shape of the light guide member 29 does not have to be rectangular, and is not particularly limited.

[0116] The number of light guide members 29 does not have to be four and is not particularly limited.

[0117] The temperature sensor constituting the heat detection unit 14 may be, for example, a thermocouple, and is not limited to a thermistor.

[0118] The light emitting elements constituting the light source unit 16 are not limited to LEDs.

[0119] Light emitted from one light source unit 16 may be incident on the incident surfaces 291 of a plurality of light-guiding members 29 .

[0120] Furthermore, a sound output hole may be formed in the bottom plate 27, and a surrounding wall may be provided in the first space 201 surrounding the sound path from the sound output hole 281 formed in the middle plate 28 to the sound output hole formed in the bottom plate 27.

[0121] (summary) The above-described embodiments and the like disclose the following aspects.

[0122] The detector (1) of the first embodiment includes a housing (2), a smoke detector (13), a heat detector (14), and a sound output unit (15). The housing (2) is disposed on an installation surface of a structure. The smoke detector (13) is disposed inside the housing (2). The heat detector (14) is disposed inside the housing (2). The sound output unit (15) is disposed inside the housing (2).

[0123] According to the first aspect, the detector (1) can issue an alert by the sound output unit (15) upon detecting either smoke or heat.

[0124] In the detector (1) of the second aspect, in the first aspect, the housing (2) has a main body portion (21) that supports the weight of the smoke detection portion (13), the heat detection portion (14), and the sound output portion (15), and a cover portion (22). The cover portion (22) extends in a first direction away from the installation surface from the main body portion (21). The cover portion (22) has a plurality of cover support portions (26), a middle plate (28), and a bottom plate (27). The plurality of cover support portions (26) extend in the first direction from the main body portion (21). The middle plate (28) has its weight supported by middle portions of the plurality of cover support portions (26). The bottom plate (27) has its weight supported by tip portions of the plurality of cover support portions (26). The cover portion (22) has a first opening (203) that communicates a first space (201) between the bottom plate (27) and the middle plate (28) with an outside space. The cover portion (22) has a second opening (204) that communicates a second space (202) between the middle plate (28) and the main body portion (21) with an outside space. The middle plate (28) has a sound output hole (281) that communicates the first space (201) with the second space (202).

[0125] According to the second aspect, the sound pressure of the sound emitted from the sound output portion (15) below the bottom plate (27) becomes high.

[0126] In the detector (1) of the third embodiment, the heat detector (14) is disposed in the first space (201) in the second embodiment, and the smoke detector (13) is disposed in the second space (202).

[0127] According to the third aspect, the smoke detection section (13) and the heat detection section (14) can be arranged with fewer restrictions relative to each other.

[0128] In the fourth aspect of the sensor (1), in the second or third aspect, the length of the first space (201) in a first direction parallel to the first orientation is longer than the length of the second space (202) in the first direction.

[0129] According to the fourth aspect, the sound pressure of the sound emitted from the sound output portion (15) below the bottom plate (27) becomes higher.

[0130] In the detector (1) of the fifth aspect, in the third or fourth aspect, the second space (202) has a surrounding wall (267) surrounding a sound output path from the sound output unit (15) to the sound output hole (281). When viewed in a first direction parallel to the first orientation, the surrounding wall (267) has a longitudinal direction, which extends toward the smoke detection unit (3).

[0131] According to the fifth aspect, the surrounding wall (267) functions as a guide for guiding the smoke that has flowed into the second space (202) to the smoke detection section (3).

[0132] In the sensor (1) of the sixth aspect, in any one of the first to fourth aspects, the sensor (1) is attached to a structure, and further includes a sensor base (11) to which the housing (2) is attached.

[0133] According to the sixth aspect, the sensor (1) can be easily attached to a structure.

[0134] A disaster prevention system (5) of a seventh aspect includes the sensor (1) of any one of the first to fifth aspects, a receiver (6), and a repeater (7). The receiver (6) communicates with the sensor (1) and receives detection results from the smoke detection unit (13) and the heat detection unit (14). The repeater (7) relays communication between the sensor (1) and the receiver (6).

[0135] According to the seventh aspect, the detector (1) can issue an alert by the sound output section (15) upon detecting either smoke or heat. [Explanation of symbols]

[0136] 1 sensor 11 Sensor Base 13 Smoke detector 14 Heat detection unit 15 Sound output section 2. Chassis 201 1st space 202 2nd space 203 First Opening 204 Second Opening 21 Main body 22 Cover part 24 Main body support part 25 Main body cylinder 26 Cover support part 267 Enclosure 27 Bottom plate 28 Middle Plate 281 Sound output hole 5. Disaster prevention system 6 Receiver 7 Repeater L1 Length L2 Length

Claims

1. A housing to be placed on an installation surface of the structure; A smoke detection unit disposed inside the housing; A heat detection unit disposed inside the housing; A sound output unit disposed inside the housing. sensor.

2. The housing includes: a main body portion supporting the weight of the smoke detection unit, the heat detection unit, and the sound output unit; a cover portion extending from the main body portion in a first direction away from the installation surface, The cover portion is a plurality of cover support portions extending in the first direction from the main body portion; A middle plate whose weight is supported by middle portions of the plurality of cover support portions; A bottom plate whose weight is supported by the tip ends of the plurality of cover supports; a first opening that communicates a first space between the bottom plate and the mid plate with an external space, and a second opening that communicates a second space between the mid plate and the main body with the external space, The middle plate has a sound output hole that connects the first space and the second space.

2. The detector of claim 1.

3. The heat detection unit is disposed in the first space, The smoke detector is disposed in the second space.

3. The detector of claim 2.

4. A length of the first space in a first direction parallel to the first orientation is longer than a length of the second space in the first direction. A detector as claimed in claim 2 or 3.

5. a surrounding wall surrounding a sound output path from the sound output portion to the sound output hole in the second space; When viewed in a first direction parallel to the first orientation, the surrounding wall has a longitudinal direction; The longitudinal direction extends toward the smoke detection unit. A detector as claimed in claim 3.

6. a sensor base attached to the structure and to which the housing is attached; 2. The detector of claim 1.

7. A sensor according to claim 1; a receiver that communicates with the detector to receive detection results from the smoke detection unit and the heat detection unit; a repeater that repeats the communication between the sensor and the receiver; Equipped with Disaster prevention system.

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