Fire detection device

Abstract

Disclosed is a fire detecting device 1A including a heat detecting unit 110A, which is provided so that a part of the heat detecting unit 110A is disposed in a cover 20A, and another part of the heat detecting unit 110A is exposed to the outside of the fire detecting device 1A through an insertion hole 120A formed in a top surface portion 22A; and a protection portion 130A, which is provided to cover the periphery of the insertion hole 120A in the top surface portion 22A and the other part of the heat detecting unit 110A, and has a plurality of wings, wherein the material of a wing corresponding to a first protection side wing 131A among the plurality of wings is different from the material of some other wings, or the shape of the first protection side wing 131A among the plurality of wings is different from the shape of some other wings.

Description

Technical Field

[0001] This invention relates to a fire detection device.

[0002] This application is based on and claims the benefits derived from priority of Japanese Patent Application No. 2018-062681 filed on August 31, 2018, No. 2018-162772 filed on March 28, 2018, and No. 2018-173389 filed on September 18, 2018, the entire contents of which are incorporated herein by reference. Background Technology

[0003] In common practice, a fire detector for detecting fires in a monitored area is known (see, for example, Patent Documents 1 to 3).

[0004] Specifically, regarding the fire detector in Patent Document 1, a technique for protecting a temperature detection element has been proposed. In this technique, the heat detector is configured to include the temperature detection element; a detector body for housing the temperature detection element; an insertion hole provided in a lower surface of the detector body to expose only a portion of the temperature detection element to the outside of the detector body; and a protector provided on the lower surface of the detector body, having a plurality of protrusions of the same shape, for covering the exposed temperature detection element. Furthermore, a display hole for visually identifying an indicator light disposed in the detector body from the outside is provided in a portion of the detector body other than a portion corresponding to the lower surface of the protector (see, for example, Patent Document 1).

[0005] Furthermore, Patent Document 2 discloses a fire detector capable of detecting heat and carbon monoxide. In this technology, the detector is configured to include a carbon monoxide detection unit disposed within a housing to detect carbon monoxide in a detection space (hereinafter referred to as the "first detection space") located inside the housing; and a heat detection unit disposed within the housing to detect heat in a detection space (hereinafter referred to as the "second detection space") located outside the housing. Additionally, the housing has an inlet for allowing carbon monoxide-containing gas to flow into the first detection space, and an insertion hole for inserting a portion of the heat detection unit into the second detection space (see, for example, Patent Document 2).

[0006] Furthermore, Patent Document 3 discloses a fire detector capable of detecting heat and smoke. In this technology, the detector is configured to include a base for housing a substrate on which a smoke detection element and a heat detection element are disposed; a structure coupled to the base; and a structural cover coupled to the structure. Additionally, this detector has a space surrounded by the base, the structure, and the structural cover, wherein smoke is detected by a smoke detection element inserted into the space (hereinafter referred to as the "first detection space"); a space located outside the first detection space surrounded by the base and the structural cover, allowing smoke-containing gas to flow into the first detection space (hereinafter referred to as the "flow space"); and a space located inside the flow space, wherein heat is detected by a heat detection element inserted into the space (hereinafter referred to as the "second detection space") (see, for example, Patent Document 3).

[0007] Citation List

[0008] Patent documents

[0009] Patent Document 1: JP-A-2012-198757

[0010] Patent Document 2: JP-A-2014-199632

[0011] Patent Document 3: JP-A-9-16869 Summary of the Invention

[0012] Technical issues

[0013] However, the fire detectors described in Patent Documents 1 to 3 have the following first to third problems.

[0014] Firstly, regarding the first issue, in the fire detector of Patent Document 1, since the protector and the display aperture are provided externally exposed on the lower surface of the detector body, both the protector and the display aperture are clearly visible from the outside, thus raising concerns that the design properties of the heat detector may be compromised. Furthermore, since the multiple fins of the protector have identical shapes, for example, it is difficult to ensure a uniform flow of air into the protector from each direction depending on the installation state of the heat detector, making it difficult to improve the flow characteristics of the airflow. Therefore, from the viewpoint of the design properties or flow characteristics of the airflow, there is room for improvement.

[0015] Furthermore, regarding the second issue, in the fire detector of Patent Document 2, as mentioned above, since the inlet and the insertion hole are provided within the housing, for example, gas flowing into the first detection space through the inlet (specifically, gas containing the first detection target, such as carbon monoxide) flows out into the second detection space through the insertion hole. Therefore, it is difficult to accurately detect the second detection target, such as heat, due to the outflowing gas. Thus, from the viewpoint of maintaining the detection accuracy of the second detection target, there is room for improvement.

[0016] Furthermore, regarding the third issue, in the fire detector of Patent Document 3, as mentioned above, since the second detection space is located inside the inflow space, gas containing the first detection target, such as smoke, is very likely to flow into the second detection space. Therefore, it is difficult to accurately detect the second detection target, such as heat, due to the already inflowing gas. Thus, from the viewpoint of maintaining or improving the detection accuracy of the second detection target, there is room for improvement.

[0017] The present invention addresses the above-mentioned problems, and the purpose of the present invention is to provide a fire detection device that can improve the design properties or inflow properties of airflow, maintain or improve the detection accuracy of the target object, or maintain or improve the detection accuracy of the target object.

[0018] In order to address the problems described above and to archive these objectives, the fire detection device of claim 1 is a fire detection device comprising a housing and a detection unit (for detecting fire inside the housing).

[0019] The fire detection device of claim 2, as claimed in claim 1, is attached to the mounting surface of an object. The fire detection device comprises: a heat detection unit for detecting fire, a portion of which is disposed inside the housing, the heat detection unit configured such that another portion of which is exposed to the outside of the fire detection device through an insertion hole formed in an opposite side portion of a side portion of the mounting surface on one side of the side portion corresponding to the side portion of the housing; and a protective unit provided to cover the area around the insertion hole in the opposite side portion and the other portion of the heat detection unit, the protective unit having a plurality of fins, wherein some of the fins are made of a different material than some of the other fins, or the shape of some of the fins is different from the shape of some of the other fins.

[0020] The fire detection device of claim 3, as claimed in claim 2, further comprises: a display unit provided inside the housing, the display unit displaying predetermined information by irradiating light toward the outside of the fire detection device through the insertion hole, wherein some of the protrusions are formed of a semi-transparent material, and the protrusions are configured such that light irradiated from the display unit is guided to the outside of the fire detection device by using the protrusions formed of the semi-transparent material.

[0021] The fire detection device of claim 4 of the fire detection device of claim 2 or 3, wherein the thickness of the plurality of fins is set based on the inflow or inflow direction of the airflow into the protection unit.

[0022] The fire detection device of claim 5 of any one of claims 2 to 4, wherein the fins formed using the translucent material are thicker than the thinnest of the plurality of fins.

[0023] The fire detection device of claim 6 of any one of claims 2 to 5, wherein the insertion hole is provided in a portion other than the center portion of a portion of the opposite side portion.

[0024] The fire detection device of claim 7 of claim 6, wherein the convex wing on one side of the center portion of the opposite side of the plurality of convex wing is a convex wing that is thinner than the thickest convex wing or narrower than the widest convex wing among the plurality of convex wing.

[0025] The fire detection device of claim 8, as claimed in claim 1, further comprises: a first detection space for detecting a first detection target contained in a gas flowing in from the outside of the housing on the interior of the housing; a second detection space located on the interior or exterior of the housing, the second detection space being configured to detect a second detection target; and a partition wall provided in the housing, the partition wall being configured to separate the first detection space or the second detection space to allow gas flowing into the first detection space to flow out into the second detection space.

[0026] The fire detection device of claim 9 of claim 8, wherein the first detection space includes a first detection space body in which the detection of the first detection target is performed; and an inflow space for allowing gas containing the first detection target to flow into the first detection space body, the fire detection device further including an insertion hole provided in a portion of the inflow space in a portion facing the housing, for inserting a portion of a second detection target detection unit for detecting a second detection target disposed in the housing into the second detection space, and the partition wall is configured to surround at least a portion of the second detection target detection unit in the inflow space and the insertion hole.

[0027] The fire detection device of claim 10, as claimed in claim 8, further comprises: an inlet provided in the housing to allow gas containing the first detection target to flow into the first detection space; and a first detection target detection unit for detecting the first detection target, the first detection target detection unit being disposed in the first detection space, wherein the partition wall is configured to surround at least a portion of the first detection target detection unit and the inlet in the first detection space.

[0028] The fire detection device of claim 11 of any of claims 8 to 10, wherein the housing and the partition wall are integrally formed together.

[0029] The fire detection device of claim 12 of any of claims 8 to 11, wherein the first detection target is smoke or carbon monoxide, and the second detection target is heat.

[0030] The fire detection device of claim 13, as claimed in claim 1, further comprises: a first detection space located inside the housing for detecting a first detection target; a second detection space located inside or outside the housing for detecting a second detection target; an inflow space located inside the housing to allow gas containing the first detection target to flow into the first detection space from outside the housing; a detection unit for detecting the second detection target, the detection unit being provided such that at least a portion of the detection unit is disposed in the second detection space; and a cover unit covering at least a portion of the periphery of the detection unit, such that gas flowing into the inflow space is prevented from contacting the detection unit.

[0031] The fire detection device of claim 13 and the fire detection device of claim 14, wherein the cover unit is formed of a tubular body that allows the detection unit to be inserted therein.

[0032] The fire detection device of claim 14 and the fire detection device of claim 15, wherein the inner diameter of the detection unit on the near-end side of the inner diameter of the cover unit is set to be larger than the other inner diameter.

[0033] The fire detection device of claim 16 of the fire detection device of claim 14 or 15, wherein the inner diameter of at least a portion of the cover unit is set to be substantially the same as the outer diameter of a portion into which the detection unit is inserted.

[0034] The fire detection device of claim 17 of any of claims 14 to 16, wherein an insertion hole for inserting the detection unit into the second detection space is provided in the facing side portion of the second detection space in the side portion facing the housing, and the insertion hole and the cover unit are configured to allow the end portion of the cover unit on one side of the second detection space to be fitted to the facing side portion through the insertion hole.

[0035] The fire detection device of claim 18 of any of claims 13 to 17, wherein the first detection target is smoke or carbon monoxide, and the second detection target is heat.

[0036] Advantages of the present invention

[0037] The fire detection device of claim 1, since the unit for detecting fire is provided inside the housing, fire can be detected inside the housing and can effectively detect whether a fire has occurred.

[0038] The fire detection device of claim 2, by making some of the plurality of protrusions of different material than the other protrusions, for example, can guide light irradiated from the display unit disposed in the housing to the outside of the fire detection device by using only some of the protrusions formed with the translucent material, through the protrusions and the insertion hole. Therefore, since there is no need in the art to provide a display hole in the housing for guiding light irradiated from the display unit to the outside, the design properties of the fire detection device can be maintained compared to conventional technology (where the protector and the display hole are exposed to the outside). Furthermore, by making the shape of some of the plurality of protrusions different from the shape of the other protrusions, the inflow of airflow into the housing from each direction is easily homogenized according to the installation state of the fire detection device, compared to the case where the plurality of protrusions are formed in the same shape. Therefore, the inflow properties of the airflow in the fire detection device can be improved.

[0039] As in the fire detection device of claim 3, since some of the protrusions are formed of a translucent material and the protrusions are configured such that light irradiated from the display unit is guided to the outside of the fire detection device by using the protrusions formed of the translucent material, some of the protrusions of the protective unit can be used as light guides, while ensuring the strength of the protective unit, and the light irradiated from the display unit can be easily visually identified in various directions.

[0040] The fire detection device of claim 4, since the thickness of the plurality of protrusions is set based on the inflow or inflow direction of the airflow into the protection unit, the thickness of the plurality of protrusions can be set based on the inflow or inflow direction of the airflow into the protection unit, and the inflow characteristics of the airflow into the protection unit can be ensured while maintaining the durability of the protection unit.

[0041] The fire detection device of claim 5, since the fins formed using the translucent material are thicker than the thinnest of the plurality of fins, light irradiated from the display unit is easily guided to the outside of the fire detection device, while suppressing damage to the fins formed using the translucent material. Therefore, the display function of the fire detection device can be further maintained, while the durability of the fins formed using the translucent material is improved.

[0042] The fire detection device of claim 6, since the insertion hole is provided in a portion other than the center portion of one portion of the opposite side portion, offers some limitations on the attachment of the heat detection unit and the display unit compared to the case where the insertion hole is formed in the center portion of the opposite side portion. Therefore, the attachment nature of the heat detection unit and the display unit can be maintained.

[0043] The fire detection device of claim 7, since the wing on one side of the center portion of the opposing side among the plurality of winglets is thinner or narrower than the thickest wing or the widest wing among the plurality of winglets, makes it easier to homogenize the inflow of airflow from each direction into the protection unit when the insertion hole is located at a portion other than the center portion of the opposing side. Therefore, the airflow characteristics of the protection unit can be improved.

[0044] The fire detection device of claim 8, comprising a first detection space for detecting a first detection target contained in a gas flowing in from the outside of the housing; a second detection space located on the outside of the housing for detecting a second detection target; and a partition wall disposed within the housing to separate the first detection space from the second detection space, thereby preventing gas flowing into the first detection space from flowing out into the second detection space. Therefore, compared to the case without the partition wall, the detection of the second detection target by the detection unit is prevented from being hindered by the flowing gas, and the detection accuracy of the second detection target can be maintained or improved.

[0045] The fire detection device of claim 9, having an insertion hole disposed in a portion of the inflow space in a portion facing the housing for inserting a portion of a second detection target detection unit into the second detection space, and the partition wall configured to surround at least a portion of the second detection target detection unit in the inflow space and the insertion hole, can effectively prevent gas flowing into the inflow space from flowing out into the second detection space through the insertion hole, and easily maintain the detection accuracy of the second detection target.

[0046] The fire detection device of claim 10, since it includes an inlet hole provided in the housing; and a first detection target detection unit that detects the first detection target, and the partition wall is configured to surround at least a portion of the first detection target detection unit and the inlet hole in the first detection space, can effectively prevent gas flowing into the first detection space from flowing out into the second detection space through the inlet hole, and can easily maintain the detection accuracy of the second detection target.

[0047] The fire detection device of claim 11, since the housing and the partition wall are integrally formed, saves time and effort in attaching the partition wall to the housing compared to a case where the housing and the partition wall are formed separately, and improves the manufacturability of the fire detection device. Furthermore, it reduces the number of parts in the fire detection device and reduces the environmental burden associated with its manufacture.

[0048] The fire detection device of claim 12, since the first detection target is smoke or carbon monoxide and the second detection target is heat, can prevent the gas containing smoke or carbon monoxide from flowing out into the second detection space and can maintain or improve the accuracy of heat detection.

[0049] The fire detection device of claim 13, comprising: a first detection space located inside the housing; a second detection space located inside or outside the housing; an inflow space located inside the housing to allow gas containing the first detection target to flow into the first detection space from outside the housing; a detection unit for detecting the second detection target, the detection unit being provided such that at least a portion of the detection unit is disposed in the second detection space; and a cover unit covering at least a portion of the periphery of the detection unit, thereby allowing gas flowing into the inflow space to be prevented from contacting the detection unit, thus preventing gas flowing into the inflow space from contacting the detection unit and maintaining or improving the detection accuracy of the second detection target.

[0050] The fire detection device of claim 14, since the cover unit is formed of a tubular body that allows the detection unit to be inserted therein, can be simply configured as the cover unit and the manufacturability of the cover unit can be improved.

[0051] The fire detection device of claim 15, since the inner diameter of the detection unit on the near-end side of the inner diameter of the cover unit is set to be larger than the other inner diameter, can increase the likelihood of the detection unit being inserted into the cover unit and facilitate the reduction in the size of the cover unit.

[0052] The fire detection device of claim 16, since the inner diameter of at least a portion of the cover unit is set to be approximately the same as the outer diameter of a portion into which the detection unit is inserted, makes it easier to prevent gas flowing into the inflow space from contacting the detection unit and to maintain the detection accuracy of the second detection target.

[0053] The fire detection device of claim 17, since the insertion hole for inserting the detection unit into the second detection space is provided in the facing side portion of the second detection space in the side portion facing the housing, and the insertion hole and the cover unit are configured to allow the end portion of the cover unit on one side of the second detection space to be fitted to the facing side portion through the insertion hole, can prevent gas flowing into the inflow space from flowing into the end portion on the side of the second detection space, and makes it easier to prevent gas flowing into the inflow space from contacting the detection unit. Furthermore, the cover unit is positioned more easily during the assembly of the fire detection device, thus allowing for rapid and accurate assembly.

[0054] The fire detection device of claim 18, since the first detection target is smoke or carbon monoxide and the second detection target is heat, can suppress the contact between the smoke-containing gas and the sensing unit, and can maintain or improve the accuracy of heat detection. Attached Figure Description

[0055] Figure 1 The following is a side view of the attached state of the fire detection device according to specific embodiment 1.

[0056] Figure 2 for Figure 1 An enlarged view of the area where the fire detection device is located.

[0057] Figure 3 The following is a bottom view of the fire detection device with the attachment base removed.

[0058] Figure 4 For along Figure 3 The cross-sectional view obtained by the AA line.

[0059] Figure 5 The following is a side view of the attached state of the fire detection device according to specific embodiment 2.

[0060] Figure 6 The diagram illustrates a fire detection device with the attachment base removed. Figure 6 (a) is a plan view and Figure 6 (b) is the bottom view.

[0061] Figure 7 For along Figure 6 (b) The cross-sectional view obtained by the AA line.

[0062] Figure 8 The diagram below illustrates the inner cover, where... Figure 8 (a) is a plan view and Figure 8 (b) is the bottom view.

[0063] Figure 9 The following is a side view of the attached state of the fire detection device according to specific embodiment 3.

[0064] Figure 10 The diagram illustrates a fire detection device with the attachment base removed. Figure 10 (a) is a plan view and Figure 10 (b) is the bottom view.

[0065] Figure 11 For along Figure 10 (b) The cross-sectional view obtained by the AA line.

[0066] Figure 12 For along Figure 10 (b) is the cross-sectional view obtained from the BB line.

[0067] Figure 13 The following is a perspective view of the inner cover.

[0068] Figure 14 The following is a perspective view of the detector cover.

[0069] [Symbol Explanation]

[0070] DA's predetermined distance

[0071] H1A Ceiling Height

[0072] H2A personnel eye height

[0073] HMA personnel

[0074] Fire detection devices 1A, 1B, and 1C

[0075] Mounting surfaces 2A, 2B, and 2C

[0076] 10A, 10B, 10C with attached base

[0077] 20A, 20B, 20C Outer Cover

[0078] 21A, 21B, 21C Outer Cover Body

[0079] Top surface portion of 22A, 22B, 22C

[0080] 23A, 23B, 23C First convex wing section

[0081] 24A, 24B, 24C Second convex wing section

[0082] Inner cover of 30A, 30B, 30C

[0083] 30aA, 30aB, 30aC First opening

[0084] 30bB Inlet Hole

[0085] 40A, 40B, 40C Inflow Space

[0086] 50A, 50B, 50C Insect Netting

[0087] 60A Probe Space

[0088] 61B Carbon Monoxide Detection Space

[0089] 61C First Probe Space

[0090] 62B Thermal Detection Space

[0091] 62C Second Probe Space

[0092] 63B Smoke Detection Space

[0093] 70A, 70B, 70C detector covers

[0094] 70aA, 70aB, 70aC Second Opening

[0095] Detector body of 80A, 80B, and 80C

[0096] 81A base

[0097] 90A, 90B, 90C terminal boards

[0098] 91A, 91B, 91C Attachment components

[0099] 91aB, 91aC First attachment hole

[0100] 91bB, 91bC Second Attachment Holes

[0101] 100A, 100B, 100C substrate

[0102] 104aA light guide

[0103] 110A and 110B thermal detection units

[0104] 110C Thermal Detection Unit; Thermal Sensing Unit

[0105] 120A, 120B, 120C Insertion Holes

[0106] 130A, 130B, 130C Protected Parts

[0107] 131A First Protective Side Flange

[0108] 131B and 131C: Long convex wing; Protective side convex wing

[0109] 132A Second Protective Side Flange

[0110] 133A Third Protective Side Flange

[0111] 134A Fourth Protective Side Flange

[0112] 135A Protective Side Connection Part

[0113] Insertion holes 140aB, 140bB, 141C, 142C

[0114] 150B First partition wall; partition wall

[0115] 150C First Cover Section

[0116] 160B Second partition wall

[0117] 161C and 162C insertion holes

[0118] 170C Second Cover Section Detailed Implementation

[0119] In the following description, specific embodiments of the fire detection device according to the present invention will be detailed with reference to the accompanying drawings. First, the basic concepts of these embodiments will be explained [I], followed by the specific details of these embodiments [II]. Finally, modifications to these embodiments will be described [III]. However, the present invention is not limited to these specific embodiments.

[0120] [I] Basic Concepts of Specific Embodiments

[0121] First, the basic concepts of specific embodiments 1 to 3 will be explained.

[0122] (Basic concepts of specific embodiment 1)

[0123] First, the basic concept of Specific Embodiment 1 will be explained. Specific Embodiment 1 (corresponding to the mode of Problem 1) is generally a fire detection device attached to the mounting surface of an object, and relates to a fire detection device used to detect fires in a monitored area.

[0124] In this specification, in specific embodiment 1, the "fire detection apparatus" is a device for thermally detecting and reporting fires in the monitored area, and includes concepts such as a thermal fire detector or fire alarm, a thermal and optical fire detector or fire alarm, etc. Furthermore, the "installation object" is the object on which the fire detection apparatus is mounted, and includes concepts such as a ceiling portion or a wall portion of a building. Furthermore, the specific structure or type of the "building" is arbitrary. For example, the "building" includes concepts such as a detached house, a complex building such as a townhouse or an apartment, an office building, an event facility, a commercial facility, a public facility, etc. Furthermore, the "monitored area" is the area being monitored, and includes concepts such as an area inside the building, an area outside the building, etc. Furthermore, "reporting" includes concepts such as outputting predetermined information to an external device, displaying predetermined information via an output unit (a display unit or a sound output unit), or outputting predetermined information as sound. Hereinafter, in Specific Embodiment 1, the "fire detection device" will be described in the context of the "thermal and optical fire detector," the "installation object" will be described in the context of the "ceiling portion of the office building," and the "monitored area" will be described in the context of the "area inside the office building."

[0125] (Basic concepts of specific embodiment 2)

[0126] Next, the basic concepts of Specific Embodiment 2 will be explained. Specific Embodiment 2 (corresponding to the mode of Question 2) generally relates to a fire detection device for detecting fires in the monitored area.

[0127] In this specification, in specific embodiment 2, the "fire detection device" is a device that detects and reports fires in the monitored area based on the detection results of multiple detection targets, and includes concepts such as a thermal and electrical fire detector or fire alarm, a thermal and optical fire detector or fire alarm, and a thermal, electrical, and optical fire detector or fire alarm. Furthermore, the "monitored area" is the area being monitored, and includes concepts such as an area inside a building, an area outside the building, etc. Furthermore, the specific structure or type of the "building" is arbitrary. For example, the "building" includes concepts such as a detached house, a mixed-use building such as a townhouse or an apartment, an office building, an event facility, a commercial facility, a public facility, etc. Furthermore, "reporting" includes concepts such as outputting predetermined information to an external device, displaying predetermined information via an output unit (a display unit or a sound output unit), or outputting the predetermined information as sound, etc. In the following specific embodiment 2, the case in which the "fire detection device" corresponds to the "thermal, electrical, and optical fire detector" and the "monitored area" corresponds to the "internal area of ​​the office building" will be described.

[0128] (Basic concepts of specific embodiment 3)

[0129] Next, the basic concepts of specific embodiment 3 will be explained. Specific embodiment 3 (corresponding to the mode of question 3) generally relates to a fire detection device for detecting fires in the monitored area.

[0130] In this specification, in specific embodiment 3, the "fire detection device" is a device that detects and reports fires in the monitored area based on the detection results of multiple detection targets, and includes concepts such as a thermal and electrical fire detector or fire alarm, a thermal and optical fire detector or fire alarm, and a thermal, electrical, and optical fire detector or fire alarm. Furthermore, the "monitored area" is the area being monitored, and includes concepts such as an area inside a building, an area outside the building, etc. Furthermore, the specific structure or type of the "building" is arbitrary. For example, the "building" includes concepts such as a detached house, a mixed-use building such as a townhouse or an apartment, an office building, an event facility, a commercial facility, a public facility, etc. Furthermore, "reporting" includes concepts such as outputting predetermined information to an external device, displaying predetermined information via an output unit (a display unit or a sound output unit), or outputting the predetermined information as sound, etc. In the following specific embodiment 3, the case in which the "fire detection device" corresponds to the "thermal and optical fire detector" and the "monitored area" corresponds to the "internal area of ​​the office building" will be described.

[0131] [II] Specific details of the specific embodiments

[0132] The specific details of these specific embodiments will then be described. [Specific Implementation Example 1]

[0134] First, the fire detection device according to Specific Embodiment 1 will be described. Specific Embodiment 1 corresponds to a mode in which the material of some of the plurality of protrusions described below differs from the material of some of the other protrusions.

[0135] (Configuration)

[0136] First, the configuration of the fire detection device according to specific embodiment 1 will be described. Figure 1 This is a side view illustrating the attached state of a fire detection device according to specific embodiment 1. Figure 2 for Figure 1 An enlarged view of the area where the fire detection device is located. Figure 3 The following is a bottom view of the fire detection device with the attachment base removed, as illustrated below. Figure 4 For along Figure 3 The cross-sectional view obtained by line AA. In the following description, Figure 1 The X direction refers to the left and right directions of the fire detection device (+X direction is the left direction of the fire detection device and –X direction is the right direction of the fire detection device). Figure 3 The Y direction refers to the forward and backward direction of the fire detection device (+Y direction is the forward direction of the fire detection device and –Y direction is the backward direction of the fire detection device), and Figure 1 The Z-direction refers to the vertical direction of the fire detection device (+Z direction is the upward direction of the flame detection device and –Z direction is the downward direction of the fire detection device). Furthermore, refer to... Figure 3 The center of the detection space, the direction away from the detection space is called the "outer side", and the direction closer to the detection space is called the "inner side".

[0137] Fire detection device 1A is a device that detects the heat in the monitored area and detects and reports the presence of the substance to be detected (e.g., smoke) in the gas. Fire detection device 1A is installed on mounting surface 2A on the lower surface of the ceiling portion (mounted object) of the building's interior, and as... Figures 1 to 4 The example includes an attachment base 10A, an outer cover 20A, an inner cover 30A, an inflow space 40A, an insect net 50A, a detection space 60A, a detector cover 70A, a detector body 80A, a terminal board 90A, and a substrate 100A.

[0138] (Configuration – Base Included)

[0139] Please refer to the reference again immediately. Figure 1 The attachment base 10A is an attachment unit that attaches the outer cover 20A to the mounting surface 2A. The attachment base 10A uses a configuration such as that of a known attachment base for this fire detection device (e.g., a generally plate-shaped attachment base made of resin), and is as follows... Figure 2 and Figure 3 The example shown is fixed to the mounting surface 2A by a fixing tool or the like.

[0140] (Configuration – Outer Cover)

[0141] Please refer to the reference again immediately. Figure 2 The outer cover 20A covers the inner cover 30A, the inflow space 40A, the insect-proof net 50A, the detection space 60A, the detector cover 70A, the detector body 80A, the terminal board 90A, and the substrate 100A. The outer cover 20A is formed of, for example, a resin material with light-shielding properties, and as... Figures 2 to 4 The example shown includes an outer cover body 21A, a top surface portion 22A, a first convex wing portion 23A, and a second convex wing portion 24A.

[0142] Among these parts, the outer cover body 21A is the basic structure of the outer cover 20A. The outer cover body 21A is formed, for example, a generally hollow cylinder (with openings on its upper and lower surfaces); it is arranged such that the upper end portion of the outer cover body 21A is as follows: Figure 2The example shows contact with the lower surface of the attachment base 10A; and is fixed to the attachment base 10A by an assembly structure (or fixing tool) or the like.

[0143] Furthermore, the top surface portion 22A is a partition unit that separates the inflow space 40A. The top surface portion 22A is formed of, for example, a generally circular plate-like body, and as... Figures 2 to 4 The example shown is provided horizontally below the outer cover body 21A.

[0144] Furthermore, the first convex wing 23A is a partition unit that separates the inflow space 40A. The first convex wing 23A is formed of a generally plate-like body and is provided vertically between the outer cover body 21A and the top surface portion 22A. Specifically, as Figure 2 and Figure 4 As shown, a plurality of first convex wing portions 23A are provided radially from near the center of the outer cover 20A and are connected to the outer cover body 21A and the top surface portion 22A.

[0145] Furthermore, the second convex wing 24A is a partition unit that separates the inflow space 40A. The second convex wing 24A is formed of a generally plate-like body and is provided vertically between the outer cover body 21A and the top surface portion 22A. Specifically, as Figure 2 and Figure 4 As shown, a plurality of second convex portions 24A are provided between the inner end portions of adjacent first convex portions 23A and are connected to the outer cover body 21A and the top surface portion 22A. The configuration details of the outer cover 20A will be described below. In addition, "outer cover 20A" corresponds to "housing" in the claims.

[0146] (Configuration – Inflow Space)

[0147] Please refer to the reference again immediately. Figure 2 The inflow space 40A is a space used to allow gas outside the fire detection device 1A to flow into the fire detection device 1A. Multiple inflow spaces 40A are formed inside the outer cover 20A. Specifically, as... Figure 2 and Figure 4 As shown, the space surrounded by the top surface portion 22A, the first convex wing portion 23A, the second convex wing portion 24A, and the inner cover 30A in the internal space of the outer cover 20A forms an inflow space 40A.

[0148] (Configuration – Inner Cover)

[0149] The inner cover 30A covers the detection space 60A, the detector cover 70A, the detector body 80A, and the substrate 100A, and is a separating unit that divides the inflow space 40A. The inner cover 30A is, for example, a generally hollow cylinder (its upper surface is open); it is formed of a resin material with light-shielding properties; and it is provided such that the lower surface of the inner cover 30A is like... Figure 4 As shown, the inflow space 40A on the inside of the outer cover 20A faces the top surface portion 22A of the outer cover 20A. Furthermore, as... Figure 4 As shown, a first opening 30aA is formed in the lower surface of the inner cover 30A. The first opening 30aA is used to transport the gas flowing into the inflow space 40A to the opening of the detection space 60A, and as... Figure 4 The example provided is located approximately at the center of the lower surface of the inner cover 30A and in its vicinity.

[0150] (Configuration – Space Exploration)

[0151] The Space Detection 60A series is used to detect the space containing the substance to be detected. For example... Figure 4 As shown, the space surrounded by the detector cover 70A and the detector body 80A in the internal space of the inner cover 30A forms the detection space 60A.

[0152] (Configuration – Detector Cover)

[0153] The detector cover 70A serves as a partition unit separating the detection space 60A and also as an incident suppression unit to suppress ambient light from entering the detection space 60A. The detector cover 70A is a generally hollow cylinder (with an opening on its upper surface) and is formed of a resin material with light-shielding properties. Furthermore, as... Figure 4 As shown, the detector cover 70A is configured such that its lower surface faces the top surface portion 22A of the outer cover 20A through the first opening 30aA and the inflow space 40A inside the inner cover 30A, and is fixed to the detector body 80A by an assembly structure, etc. Furthermore, as... Figure 4 As shown, a second opening 70aA is formed in the lower surface of the detector cover 70A. The second opening 70aA is an opening for allowing gas supplied from the first opening 30aA to flow into the detection space 60A, and as... Figure 4 The example shown is provided at a portion of the first opening 30aA on the lower surface corresponding to the detector cover 70A.

[0154] (Configuration – Insect Net)

[0155] Insect net 50A is a net used to prevent insects existing outside the fire detection device 1A from entering the detection space 60A. Insect net 50A uses a round mesh configuration and, as... Figure 4 The example shown is attached to the detector cover 70A.

[0156] (Configuration – Detector Body)

[0157] The detector body 80A is an attachment unit for the detector cover 70A and also serves as an incident suppression unit for suppressing ambient light incident on the detection space 60A. The detector body 80A is formed of, for example, a resin material with light-shielding properties; and is configured as follows: Figure 4 The detector body 80A is illustrated on its upper surface and is fixed to the substrate 100A using a fixing tool or the like. Furthermore, the detector body 80A has a support member (not shown) for supporting each of the first light-emitting unit (described below), the second light-emitting unit (described below), and the light-receiving unit (described below). Moreover, each optical path hole (not shown) for forming an optical path between the detection space 60A and each of the first light-emitting unit (described below), the second light-emitting unit (described below), and the light-receiving unit (described below) is formed in the detector body 80A.

[0158] (Configuration – Terminal Board)

[0159] Terminal board 90A is a housing unit that houses the inner cover 30A, the detector cover 70A, the detector body 80A, and the substrate 100A. Terminal board 90A has a generally hollow cylindrical shape (with an opening on its lower surface) and is formed of, for example, a resin material with light-shielding properties. Furthermore, as... Figure 4 As shown, the terminal board 90A is provided to cover the inner cover 30A, the detector cover 70A, the detector body 80A, and the substrate 100A from above; it is fixed to the outer cover 20A by an assembly structure, etc.; and it is fixed to the attachment base 10A by a fixing tool, etc. through a first attachment hole (not shown) formed in the attachment member 91A.

[0160] (Configuration – Substrate)

[0161] The substrate 100A is a mounting unit on which various circuits (not shown) are embedded. The substrate 100A is configured, for example, as a known flat circuit board; Figure 4 The example is generally horizontally positioned at a distance from an upper end portion and a lower end portion of the terminal plate 90A; and is fixed to the terminal plate 90A by a fixing tool through an attachment hole (not shown) formed in the terminal plate 90A and a second attachment hole (not shown) formed in the attachment member 91A.

[0162] In addition to the fact that known electronic components used in conventional fire detection device 1A are mounted on substrate 100A, such as Figure 4As shown, the first light-emitting unit (not shown), the second light-emitting unit (not shown), the light-receiving unit (not shown), the thermal detection unit 110A, the display unit (not shown), the communication unit (not shown), the power supply unit (not shown), the control unit (not shown), and the storage unit (not shown) are mounted on the substrate 100A.

[0163] (Configuration – substrate – first light-emitting unit, second light-emitting unit, and light-receiving unit)

[0164] In these units, the first light-emitting unit is a first light-emitting unit that is illuminated by a probe light (hereinafter referred to as "first probe light") in the detection space 60A, and is configured using, for example, a known light-emitting element (such as an infrared light-emitting diode (LED)). Furthermore, the second light-emitting unit is a second light-emitting unit that is illuminated by a probe light (hereinafter referred to as "second probe light") with a wavelength different from the first probe light, and is configured using, for example, a known light-emitting element (such as a blue LED). Furthermore, the light-receiving unit is a light-receiving unit that receives scattered light from the first probe light illuminating the first light-emitting unit due to smoke, outputs a first light-receiving signal based on the received scattered light, receives scattered light from the second probe light illuminating the second light-emitting unit with respect to smoke, and outputs a second light-receiving signal based on the received scattered light, and is configured using, for example, a known light-receiving element (such as a photodiode). Furthermore, the method of installing the first light-emitting unit, the second light-emitting unit, and the light-receiving unit is arbitrary. In specific embodiment 1, the mounting is configured to avoid directly receiving the first or second probe light irradiated from the first or second light-emitting unit onto the light-receiving unit through various optical path holes of the detector body 80A. For example, the first light-emitting unit and the light-receiving unit are mounted at an angle of approximately 135 degrees between the optical axis of the first light-emitting unit (hereinafter referred to as the "first light-emitting side optical axis") and the optical axis of the light-receiving unit (hereinafter referred to as the "light-receiving side optical axis"). Furthermore, the second light-emitting unit and the light-receiving unit are mounted at an angle of approximately 90 degrees between the optical axis of the second light-emitting unit (hereinafter referred to as the "second light-emitting side optical axis") and the light-receiving side optical axis.

[0165] (Configuration – substrate – thermal detection unit, display unit, communication unit, and power supply unit)

[0166] Please refer to the reference again immediately. Figure 2 Furthermore, the heat detection unit 110A is a heat detection unit for detecting fires. The heat detection unit 110A uses, for example, a known heat detection element (such as a thermistor), and is configured such that a portion of the heat detection unit 110A is like... Figures 2 to 4As shown, the fire detection device 1A is exposed to the outside through insertion holes (not shown) provided in each of the inner cover 30A, detector cover 70A, and detector body 80A, as well as insertion hole 120A of the outer cover 20A described below. Furthermore, the display unit is a display unit that displays predetermined information (e.g., information indicating whether a fire has been detected) by irradiating light (hereinafter referred to as "display light") to the outside of the fire detection device 1A, and is configured using, for example, a known display unit (LED, etc.). Moreover, the light projection method of the display unit is arbitrary. Examples include light projection by inserting a light guide 104aA provided in the insertion holes (not shown) in each of the inner cover 30A, detector cover 70A, and detector body 80A, and insertion hole 120A of the outer cover 20A, guiding the display light from the display unit toward the outside of the fire detection device 1A. Furthermore, the communication unit is a communication unit for communicating with external devices (e.g., receivers, etc.). The power supply unit is a power supply unit that supplies power from commercial power or batteries (not shown) to each unit of the fire detection device 1A.

[0167] (Configuration – Baseboard – Control Unit and Storage Unit)

[0168] Furthermore, this control unit is the control unit for controlling the fire detection device 1A. Specifically, the control unit includes a central processing unit (CPU) and internal memory (e.g., random access memory (RAM) for storing various programs to be decoded and executed on the CPU, including a basic control program, such as an OS; and an application program that is launched on the OS to perform a specified function), a program, and various data. In addition, the storage unit is a storage unit for storing the programs and various data required for the operation of the fire detection device 1A. This storage unit is configured using rewritable recording media. For example, non-volatile recording media, such as flash memory, can be used.

[0169] (Configuration – Configuration details of the outer cover)

[0170] Please refer to the reference again immediately. Figure 2 Then, the configuration details of the outer cover 20A will be described. However, unless otherwise specified, the outer cover 20A can be manufactured in any shape using any method and material.

[0171] In specific embodiment 1, such as Figures 2 to 4 As shown, the insertion hole 120A and the protective part 130A are provided in the top surface part 22A (which is the side part on the other side of the side part of the outer cover 20A opposite to the side part of the mounting surface 2A (opposite side part)).

[0172] (Configuration – Outer Cover Configuration Details – Insertion Hole)

[0173] Please refer to the reference again immediately. Figure 3 The insertion hole 120A is a through hole used to expose a portion of the heat detection unit 110A to the outside of the fire detection device 1A and to illuminate the outside of the fire detection device 1A with the display light from the display unit.

[0174] In this specification, the specific shape and size of the insertion hole 120A are arbitrary. In specific embodiment 1, as shown... Figure 3 As shown, the planar shape of the insertion hole 120A is set to be approximately elliptical (or possibly a polygon such as a quadrilateral). Furthermore, the diameter of the insertion hole 120A is set to allow only a portion of the thermal detection unit 110A to be exposed externally, and to allow the display light to illuminate the exterior of the fire detection device 1A. For example, this diameter is set to be longer than the length obtained by adding the diameter of the thermal detection unit 110A to the diameter of the light guide 104aA.

[0175] Furthermore, the method of forming the insertion hole 120A is arbitrary. The insertion hole 120A is formed in a portion other than the center portion of the top surface portion 22A. Specifically, as shown... Figure 3 As shown, the insertion hole 120A is formed in the right-side portion of the top surface portion 22A. In this case, for example, the thermal detection unit 110A and the display unit can be mounted in the insertion hole 120A or a portion near it in a portion corresponding to the substrate 100A. According to this forming method, there are a few limitations on the attachment of the thermal detection unit 110A and the display unit compared to the case where the insertion hole 120A is formed in the center portion of the top surface portion 22A. Therefore, the attachment properties of the thermal detection unit 110A and the display unit can be maintained.

[0176] A portion of the heat detection unit 110A can be disposed in the outer cover 20A through such an insertion hole 120A, and another portion of the heat detection unit 110A can be exposed to the outside of the fire detection device 1A through the insertion hole 120A. The display light from the display unit can also be irradiated to the outside of the fire detection device 1A through the insertion hole 120A.

[0177] (Configuration – Details of the outer cover configuration – Protected areas)

[0178] Please refer to the reference again immediately. Figure 2 The protective part 130A is a protective unit that protects the heat detection unit, and as follows: Figures 2 to 4 The example includes a first protective side wing 131A, a second protective side wing 132A, a third protective side wing 133A, a fourth protective side wing 134A, and a protective side connection portion 135A.

[0179] (Configuration – Configuration details of the outer cover – Protected parts – First protective side wing to fourth protective side wing)

[0180] Please refer to the reference again immediately. Figure 2 The first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A correspond to the basic structure of the protective part 130A. Each of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A is formed of a long plate-like body and provides a form as shown in the figure. Figures 2 to 4 The illustration shows the area surrounding the insertion hole 120A and a portion of the heat detection unit 110A exposed to the outside of the fire detection device 1A. Specifically, the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are provided such that their longitudinal direction is generally along the vertical direction (in the vertical direction). Figure 3 It extends slightly at an angle and is vertically positioned about the lower surface of the top surface portion 22A.

[0181] (Configuration – Configuration details of the outer cover – Protected parts – Connection parts on the protected side)

[0182] Please refer to the reference again immediately. Figure 2 The protective side connection portion 135A is a connecting unit that connects the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A. The protective side connection portion 135A is formed of, for example, the same material as the outer cover 20A, and as... Figures 2 to 4 The example shows the upper end portion of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A.

[0183] With this configuration, the insertion hole 120A can be prevented from being exposed to the outside of the fire detection device 1A through the protective part 130A, and the design properties of the fire detection device 1A can be maintained without impairing the airflow properties of the protective part 130A.

[0184] (Configuration – Configuration details of the outer cover – Protected parts – Configuration details of the first protective side wings to the fourth protective side wings)

[0185] Next, the configuration details of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A will be explained.

[0186] First, the material of each of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A is arbitrary. In specific embodiment 1, some of the winglets of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are made of a different material than some of the other winglets. Specifically, the first protective side wing 131A is formed of a translucent material (such as translucent resin material, glass material, etc.), and the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are formed of the same material as the outer cover 20A.

[0187] With this configuration, by using the translucent material to form only the first protective side wing 131A, the display light emanating from the display unit disposed in the outer cover 20A can be guided to the outside of the fire detection device 1A through the first protective side wing 131A and the insertion hole 120A. Therefore, since there is no need to provide a display hole in the outer cover 20A for guiding the display light to the outside, the design characteristics of the fire detection device 1A can be maintained compared to conventional technology (where the protector and the display hole are exposed to the outside).

[0188] Furthermore, the specific configuration of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A is arbitrary. In specific embodiment 1, these protective side wing protrusions are configured such that display light emanating from the display unit is guided through the first protective side wing 131A to the outside of the fire detection device 1A. More specifically, these protective side wing protrusions are configured such that the display light can be visually identified by a person looking up at the fire detection device 1A under predetermined conditions. In this specification, the "predetermined condition" is arbitrary. In specific embodiment 1, such as Figure 1 As shown, the predetermined conditions correspond to the fact that the fire detection device 1A is installed on the ceiling at a height H1A (e.g., 2.4m) of the mounting surface 2A, the person HMA is located within a predetermined distance DA from the fire detection device 1A (e.g., within 3.0m), and the height H2A of the person HMA's eyes is lower than the height H1A of the mounting surface 2A (e.g., 1.8m).

[0189] Specifically, firstly, the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are provided adjacent to the insertion hole 120A. More specifically, as... Figure 3As shown, the first protective side wing 131A is disposed on the upper right side of the insertion hole 120A, the second protective side wing 132A is disposed on the upper left side of the insertion hole 120A, the third protective side wing 133A is disposed on the upper front side and the right side of the insertion hole 120A, and the fourth protective side wing 134A is disposed on the upper rear side and the right side of the insertion hole 120A.

[0190] With this configuration, personnel can visually identify the displayed light when looking up at the fire detection device 1A under predetermined conditions. Furthermore, in particular, while ensuring the strength of the protected portion 130A, the first protective side wing 131A can be used as a light guide, and the displayed light can be easily visually identified from various directions.

[0191] Furthermore, the shapes (specifically, the external shapes or sizes of the winglets) of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are arbitrary. In specific embodiment 1, among the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A, some of the winglets have shapes different from those of the other winglets. Specifically, as... Figure 2 and Figure 4 As shown, the vertical lengths of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are set to be longer than the vertical length of a portion of the heat detection unit 11A exposed outside the fire detection device 1A. Furthermore, in specific embodiment 1, the widths of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are set based on experimental results, etc., to ensure that the airflow flowing into the protected portion 130A from each direction is uniform. For example, as... Figure 2 and Figure 4As shown, these widths can be set to be shorter than the diameter of the insertion hole 120A, and the width of the second protective side wing 132A can be set to be narrower than the widths of the other wings. Furthermore, in specific embodiment 1, the thicknesses of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A are set based on the inflow or inflow direction of the airflow into the protective portion 130A. For example, this thickness can be set based on experimental results, etc., to ensure that the airflow flowing into the protective portion 130A from each direction is uniform. For example, the thickness of the second protective side wing 132A can be set to be thinner than the thickness of the other wings. Furthermore, the thicknesses of the third protective side wing 133A and the fourth protective side wing 134A can be set to be thicker than the thickness of the second protective side wing 132A. Furthermore, the thickness of the first protective side wing 131A can be set to be thicker than the thickness of the other wings.

[0192] With this configuration, compared to a configuration where multiple protrusions are formed in the same shape, it is easier to uniformly distribute the airflow into the protected portion 130A from each direction according to the installation state of the fire detection device 1A. Therefore, the airflow characteristics in the fire detection device 1A can be improved. Furthermore, the thickness of the multiple protrusions can be set according to the airflow or direction into the protected portion 130A, ensuring the airflow characteristics into the protected portion 130A while maintaining its durability. Moreover, since the first protective side protrusion 131A is thicker than the thinnest of the multiple protrusions (specifically, the thickest), the display light emanating from the display unit is easily guided to the outside of the fire detection device 1A, while suppressing damage to the first protective side protrusion 131A, etc. Therefore, the display function of the fire detection device 1A can be further maintained, while improving the durability of the first protective side protrusion 131A. In particular, the first protective side wing 131A is located at the position furthest from the center of the top surface portion 22A. Therefore, by setting the thickness of the first protective side wing 131A as described above, it helps to improve the uniformity of the airflow from each direction into the protective portion 130A, the design properties of the fire detection device 1A, and the durability of the protective portion 130A. Furthermore, since the second protective side wing 132A is thinner than the thickest wing among the plurality of wings (specifically, the thinnest wing) and narrower than the widest wing (specifically, the narrowest wing), it becomes easier to uniformly distribute the airflow from each direction into the protective portion 130A when the insertion hole 120A is provided in a portion other than the center of the top surface portion 22A. Therefore, the airflow characteristics of the protective portion 130A can be improved.

[0193] The method for forming the protective portion 130A described above is arbitrary. In specific embodiment 1, the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, the fourth protective side wing 134A, and the protective side connecting portion 135A are respectively formed. Specifically, the first protective side wing 131A is formed by injection molding a semi-transparent resin material, and the outer cover 20A, the second protective side wing 132A, the third protective side wing 133A, the fourth protective side wing 134A, and the protective side connecting portion 135A are integrally formed by injection molding a resin material with light-shielding properties. Subsequently, the first protective side wing 131A is connected to the outer cover 20A and the protective side connecting portion 135A through an assembly structure, thereby forming the protective portion 130A.

[0194] (Regarding the operation of fire detection devices)

[0195] Next, the operation of the fire detection device 1A configured as described above will be explained.

[0196] That is, for example, when the fire detection device 1A is attached to the mounting surface 2A, the insertion hole 120A covers the protective part 130A, thus preventing the insertion hole 120A from being exposed to the outside of the fire detection device 1A.

[0197] Furthermore, for example, when the display light shines from the display unit while the fire detection device 1A is attached to the mounting surface 2A, the display light shining from the display unit is guided to the outside of the fire detection device 1A through the first protective side wing 131A, so the first protective side wing 131A can be used as a light guide 104aA.

[0198] (Effect of specific embodiment 1)

[0199] As mentioned above, according to specific embodiment 1, since the material of the first protective side wing 131A among the first protective side wing 131A to the fourth protective side wing 134A is different from the material of some other wing, for example, by using this translucent material to form only the first protective side wing 131A, light irradiated from the display unit disposed in the outer cover 20A can be guided to the outside of the fire detection device 1A through the first protective side wing 131A and the insertion hole 120A. Therefore, since there is no need in the art to provide a display hole in the outer cover 20A for guiding light irradiated from the display unit to the outside, the design nature of the fire detection device 1A can be maintained compared to conventional technology (where the protector and the display hole are exposed to the outside). Furthermore, since the shape of the first protective side wing 131A differs from the shapes of some other wings, when compared to a case where the first protective side wing 131A to the fourth protective side wing 134A are formed with the same shape, it is easier to uniformly distribute the airflow into the protected portion 130A from each direction according to the installation state of the fire detection device 1A. Therefore, the airflow characteristics in the fire detection device 1A can be improved.

[0200] Furthermore, since only the first protective side wing 131A is formed of this translucent material, and the first protective side wing 131A to the fourth protective side wing 134A are configured such that light irradiated from the display unit is guided through the first protective side wing 131A to the outside of the fire detection device 1A, the first protective side wing 131A can be used as a light guide 104aA, while ensuring the strength of the protected part 130A, and the light irradiated from the display unit can be easily visually identified in various directions.

[0201] Furthermore, since the thickness of the first protective side wing 131A to the fourth protective side wing 134A is set based on the inflow or inflow direction of the airflow into the protective part 130A, the thickness of the first protective side wing 131A to the fourth protective side wing 134A can be set based on the inflow or inflow direction of the airflow into the protective part 130A, and the inflow nature of the airflow into the protective part 130A can be ensured, while maintaining the durability of the protective part 130A.

[0202] Furthermore, since the first protective side wing 131A is thicker than the thinnest wing among the first to fourth protective side wing 134A, light emanating from the display unit is easily guided to the outside of the fire detection device 1A, while suppressing damage to the first protective side wing 131A and the like. Therefore, the display function of the fire detection device 1A can be further maintained, while the durability of the first protective side wing 131A is improved.

[0203] Furthermore, the insertion hole 120A is provided in a portion of the top surface portion 22A other than the central portion. Therefore, compared to the case where the insertion hole 120A is formed in the central portion of the top surface portion 22A, there are some limitations on the attachment of the heat detection unit 110A and the display unit. Therefore, the attachment properties of the heat detection unit 110A and the display unit can be maintained.

[0204] Furthermore, since the second protective wing 132A is thinner than the thickest wing among the first protective wing 131A to the fourth protective wing 134A, and narrower than the widest wing, it becomes easier to uniformly distribute the airflow into the protective portion 130A from each direction when the insertion hole 120A is provided at a location other than the center of the top surface portion 22A. Therefore, the airflow characteristics of the protective portion 130A can be improved. [Specific Implementation Example 2]

[0206] Next, a fire detection device according to specific embodiment 2 will be described. Specific embodiment 2 corresponds to the mode described below in which a partition wall is provided in the housing.

[0207] (Configuration)

[0208] First, the configuration of the fire detection device according to specific embodiment 2 will be described. Figure 5 This is a side view of the attached state of the fire detection device according to specific embodiment 2. Figure 6 The diagram illustrates the fire detection device with the attached base removed as described below. Figure 6 (a) is a plan view and Figure 6 (b) Bottom view. Figure 7 Along Figure 6 (b) The cross-sectional view obtained by the AA line. Figure 8 The diagram illustrates the inner cover 30B, in which... Figure 8 (a) is a plan view and Figure 8 (b) Base view. In the following description, Figure 5 The X direction refers to the left and right directions of the fire detection device (+X direction is the left direction of the fire detection device and –X direction is the right direction of the fire detection device). Figure 6 The Y direction refers to the forward and backward direction of the fire detection device (+Y direction is the forward direction of the fire detection device and –Y direction is the backward direction of the fire detection device), and Figure 5 The Z direction refers to the vertical direction of the fire detection device (+Z direction is the upward direction of the fire detection device and –Z direction is the downward direction of the fire detection device).

[0209] Fire detection device 1B, such as Figure 5The example shown is installed on the mounting surface 2B on the lower surface of the ceiling portion of the building's interior, and as illustrated... Figures 5 to 7 The illustration includes an attachment base 10B, an outer cover 20B, an inner cover 30B, an inflow space 40B, an insect screen 50B, a carbon monoxide detection space 61B, a heat detection space 62B, a smoke detection space 63B, a detector cover 70B, a detector body 80B, a terminal board 90B, and a substrate 100B. The spaces including the "inflow space 40B," the "carbon monoxide detection space 61B," and the "smoke detection space 63B" correspond to the "first detection space" in the claims.

[0210] (Configuration – Base Included)

[0211] Please refer to the reference again immediately. Figure 5 The attachment base 10B is an attachment unit that attaches the outer cover 20B to the mounting surface 2B. The attachment base 10B uses a configuration such as known attachment bases for this fire detection device (e.g., a generally plate-shaped attachment base made of resin), and is as follows... Figure 5 The example shown is fixed to the mounting surface 2B by a fixing tool or the like.

[0212] (Configuration – Outer Cover)

[0213] The outer cover 20B covers the inner cover 30B, the inflow space 40B, the insect screen 50B, the carbon monoxide detection space 61B, the smoke detection space 63B, the detector cover 70B, the detector body 80B, the terminal board 90B, and the substrate 100B. The outer cover 20B is formed of, for example, a resin material with light-shielding properties, and... Figures 5 to 7 The example shown includes an outer cover body 21B, a top surface portion 22B, a first convex wing portion 23B, and a second convex wing portion 24B.

[0214] Among these parts, the outer cover body 21B is the basic structure of the outer cover 20B. The outer cover body 21B is formed, for example, a generally hollow cylinder (with openings on its upper and lower surfaces); it is arranged such that the upper end portion of the outer cover body 21B is as follows: Figure 5 The example shows the lower surface of the attachment base 10B in contact with the surface; and it is fixed to the attachment base 10B by an assembly structure (or fixing tool) or the like.

[0215] Furthermore, the top surface portion 22B is a partition unit that separates the inflow space 40B. The top surface portion 22B is formed of, for example, a generally circular plate-like body, and as... Figures 5 to 7 The example shown is provided horizontally below the outer cover body 21B.

[0216] Furthermore, the first convex wing 23B is a partition unit that separates the inflow space 40B. The first convex wing 23B is formed of a generally plate-like body and is provided vertically between the outer cover body 21B and the top surface portion 22B. Specifically, as Figure 5 and Figure 7 As shown, a plurality of first convex wing portions 23B are provided radially from near the center of the outer cover 20B and are connected to the outer cover body 21B and the top surface portion 22B.

[0217] Furthermore, the second convex wing 24B is a partition unit that separates the inflow space 40B. The second convex wing 24B is formed of a generally plate-like body and is provided vertically between the outer cover body 21B and the top surface portion 22B. Specifically, as Figure 5 and Figure 7 As shown, a plurality of second convex portions 24B are provided between the inner end portions of adjacent first convex portions 23B and are connected to the outer cover body 21B and the top surface portion 22B. The configuration details of the outer cover 20B will be described below.

[0218] (Configuration – Inflow Space)

[0219] Please refer to the reference again immediately. Figure 5 The inflow space 40B is a space used to allow smoke or carbon monoxide-containing gas from outside the fire detection device 1B to flow into the fire detection device 1B. Multiple inflow spaces 40B are formed inside the outer cover 20B. Specifically, as... Figure 5 and Figure 7 As shown, the space surrounded by the top surface portion 22B, the first convex wing portion 23B, the second convex wing portion 24B, and the inner cover 30B within the interior space of the outer cover 20B forms an inflow space 40B. The terms "smoke" and "carbon monoxide" as described above correspond to the "first detection target" in the claims.

[0220] (Configuration – Inner Cover)

[0221] The inner cover 30B covers the carbon monoxide detection space 61B, the smoke detection space 63B, the detector cover 70B, the detector body 80B, and the substrate 100B, and is a partition unit separating the inflow space 40B. The inner cover 30B is, for example, a generally hollow cylinder (with an opening on its upper surface); formed of a resin material with light-shielding properties; and provided to allow the lower part of the inner cover 30B to... Figure 7 As shown, the inflow space 40B on the inside of the outer cover 20B faces the top surface portion 22B of the outer cover 20B.

[0222] In addition, such as Figure 7 and Figure 8 As shown, a first opening 30aB and an inflow hole 30bB are formed in the lower part of the inner cover 30B. The first opening 30aB is used to transport the gas flowing into the inflow space 40B to the opening of the smoke detection space 63B, and as shown... Figure 7 The example shown is provided approximately at the center and near the underside of the inner cover 30B. Furthermore, the inlet hole 30bB is an opening for directing gas flowing into the inlet space 40B to the carbon monoxide detection space 61B. For example... Figure 8 As shown, an inlet 30bB is provided in the inner cover 30B. Specifically, the inlet 30bB is provided in a portion of the lower part of the inner cover 30B facing the carbon monoxide detection space 61B. The configuration details of the inner cover 30B will be described below. Furthermore, the "outer cover 20B" and "inner cover 30B" described above correspond to the "housing" in the claims.

[0223] (Configuration – Carbon Monoxide Detection Space)

[0224] The 61B series of carbon monoxide detection space is the first detection space body for carbon monoxide detection. For example... Figure 8 As shown below, the space surrounded by the first partition wall 150B and the substrate 100B located inside the inner cover 30B form a carbon monoxide detection space 61B.

[0225] (Configuration – Thermal Detection Space)

[0226] Please refer to the reference again immediately. Figure 7 The 62B thermal detection space is a second detection space used for thermal detection. For example... Figure 7 As shown, a heat detection space 62B is formed in the space outside the outer cover 20B, near the insertion hole 120B described below. This "heat" corresponds to the "second detection target" in the claims.

[0227] (Configuration – Smoke Detection Space)

[0228] The smoke detection space 63B is the first smoke detection space body within it. For example... Figure 7As shown, the space surrounded by the detector cover 70B and the detector body 80B located inside the inner cover 30B forms a smoke detection space 63B.

[0229] (Configuration – Detector Cover)

[0230] The detector cover 70B is a partition unit separating the smoke detection space 63B, and also an incident suppression unit preventing ambient light from entering the smoke detection space 63B. The detector cover 70B is a generally hollow cylinder (with an opening on its upper surface) and is formed of a resin material with light-shielding properties. Furthermore, as... Figure 7 As shown, the detector cover 70B is configured such that its lower portion faces the top surface 22B of the outer cover 20B through the first opening 30aB and the inflow space 40B inside the inner cover 30B, and is fixed to the detector body 80B by an assembly structure, etc. Furthermore, as... Figure 7 As shown, a second opening 70aB is formed in the lower part of the detector cover 70B. The second opening 70aB is an opening for allowing gas supplied from the first opening 30aB to flow into the smoke detection space 63B, and as... Figure 7 The example shown is provided in a portion of the first opening 30aB corresponding to the lower portion of the detector cover 70B.

[0231] (Configuration – Insect Net)

[0232] Insect net 50B is a net used to prevent insects present outside the fire detection device 1B from entering the smoke detection space 63B. Insect net 50B uses a circular mesh configuration and, as... Figure 7 The example shown is attached to the detector cover 70B.

[0233] (Configuration – Detector Body)

[0234] The detector body 80B is an attachment unit to the detector cover 70B, and also serves as an incident suppression unit for suppressing ambient light incident on the smoke detection space 63B. The detector body 80B is formed of, for example, a resin material with light-shielding properties; and is configured as follows: Figure 7 The detector body 80B is illustrated in the diagram and covers the upper surface of the detector cover 70B; it is fixed to the substrate 100B by a fixing tool or the like. Furthermore, the detector body 80B has a support member (not shown) for supporting each of the first light-emitting unit (described below), the second light-emitting unit (described below), and the light-receiving unit (described below). Moreover, each optical path hole (not shown) for forming an optical path between the smoke detection space 63B and each of the first light-emitting unit (described below), the second light-emitting unit (described below), and the light-receiving unit (described below) is formed in the detector body 80B.

[0235] (Configuration – Terminal Board)

[0236] Terminal board 90B is a housing unit that houses the inner cover 30B, detector cover 70B, detector body 80B, and substrate 100B. Terminal board 90B has a generally hollow cylindrical shape (with an opening on its lower surface) and is formed of, for example, a resin material with light-shielding properties. Furthermore, as... Figure 7 As shown, the terminal board 90B is provided to cover the inner cover 30B, the detector cover 70B, the detector body 80B, and the substrate 100B from above; it is fixed to the outer cover 20B by an assembly structure, etc.; and it is fixed to the attachment base 10B by a fixing tool, etc. through a first attachment hole 91aB formed in the attachment member 91B.

[0237] (Configuration – Substrate)

[0238] The substrate 100B is a mounting unit on which various circuits (not shown) are embedded. The substrate 100B uses (for example, a known flat circuit board configuration) such as Figure 7 The example is generally horizontally positioned at a distance from the upper and lower ends of the terminal plate 90B; and is fixed to the terminal plate 90B by a fixing tool through an attachment hole (not shown) formed in the terminal plate 90B and a second attachment hole 91bB formed in the attachment member 91B.

[0239] In addition to the fact that the known electronic components used in the conventional fire detection device 1B are mounted on the substrate 100B, such as Figure 7 As shown, a smoke detection unit (not shown), a carbon monoxide detection unit (not shown), a heat detection unit 110B, a display unit (not shown), a communication unit (not shown), a power supply unit (not shown), a control unit (not shown), and a storage unit (not shown) are mounted on a substrate 100B.

[0240] (Configuration – Substrate Smoke Detection Unit)

[0241] Among these units, the smoke detection unit is a first target detection unit for detecting smoke. The smoke detection unit is configured using, for example, a known smoke detection unit and includes a first light-emitting unit, a second light-emitting unit, and a light-receiving unit (none illustrated). In this specification, the first light-emitting unit is a first light-emitting unit that illuminates the smoke detection space 63B with a detection light (hereinafter referred to as "first detection light") and is configured using, for example, a known light-emitting element (such as an infrared LED). Furthermore, the second light-emitting unit is a second light-emitting unit that illuminates the smoke detection space 63B with a detection light (hereinafter referred to as "second detection light") of a wavelength different from the first detection light and is configured using, for example, a known light-emitting element (such as a blue LED). Furthermore, the light-receiving unit is a light-receiving unit that receives scattered light from the first detection light illuminating the first light-emitting unit due to smoke, outputs a first light-receiving signal based on the received scattered light, receives scattered light from the second detection light illuminating the second light-emitting unit regarding smoke, and outputs a second light-receiving signal based on the received scattered light, and is configured using, for example, a known light-receiving element (such as a photodiode). Furthermore, the method of installing the first light-emitting unit, the second light-emitting unit, and the light-receiving unit is arbitrary. In specific embodiment 2, the installation is configured to avoid directly receiving the first or second probe light irradiated from the first or second light-emitting unit onto the light-receiving unit through various optical path holes of the detector body 80B. For example, the first light-emitting unit and the light-receiving unit are installed at a position where the angle between the optical axis of the first light-emitting unit (hereinafter referred to as the "first light-emitting side optical axis") and the optical axis of the light-receiving unit (hereinafter referred to as the "light-receiving side optical axis") is approximately 135 degrees. Furthermore, the second light-emitting unit and the light-receiving unit are installed at a position where the angle between the optical axis of the second light-emitting unit (hereinafter referred to as the "second light-emitting side optical axis") and the light-receiving side optical axis is approximately 90 degrees.

[0242] (Configuration – Substrate – Carbon monoxide detection unit and thermal detection unit)

[0243] Furthermore, the carbon monoxide detection unit is the first target detection unit for detecting carbon monoxide. This carbon monoxide detection unit is configured using, for example, a known carbon monoxide detection element (e.g., a CO sensor) and is provided in a portion corresponding to an inflow hole 30bB in a portion of the substrate 100B (i.e., provided at a position close to the inflow hole 30bB on the interior of the inner cover 30B). Furthermore, the heat detection unit 110B is the second target detection unit for detecting heat. The heat detection unit 110B is configured using, for example, a known heat detection element (e.g., a thermistor), and is arranged such that a portion of the heat detection unit 110B is as follows: Figure 7As shown, the thermal detection space 62B is inserted through the insertion holes (not shown) provided in each of the detector cover 70B and the detector body 80B, the insertion hole 140aB of the inner cover 30B described below, and the insertion hole 120B of the outer cover 20B described below.

[0244] (Configuration – substrate – display unit, communication unit, and power supply unit)

[0245] Furthermore, the display unit is a display unit that displays predetermined information (such as information indicating whether a fire has been detected) by irradiating light (hereinafter referred to as "display light") onto the outside of the fire detection device 1B, and is configured using, for example, a known display unit (LED, etc.). Moreover, the light projection method of the display unit is arbitrary. Examples include light projection of the display light from the display unit directed toward the outside of the fire detection device 1B by inserting light guides (not shown) into insertion holes (not illustrated) provided in each of the detector cover 70B and the detector body 80B, insertion hole 140bB of the inner cover 30B described below, and insertion hole 120B of the outer cover 20B described below. Furthermore, the communication unit is a communication unit for communicating with external devices (such as receivers, etc.). Furthermore, the power supply unit is a power supply unit that supplies power from commercial power or batteries (not illustrated) to each unit of the fire detection device 1B.

[0246] (Configuration – Baseboard – Control Unit and Storage Unit)

[0247] Furthermore, this control unit is the control unit for controlling the fire detection device 1B. Specifically, the control unit includes a CPU and a computer with internal memory (e.g., RAM for storing various programs to be decoded and executed on the CPU, including a basic control program, such as an OS; and an application program that is launched on the OS to perform a specified function), a program, and various data. In addition, the storage unit is a storage unit for storing the programs and various data required for the operation of the fire detection device 1B. This storage unit is configured using rewritable recording media. For example, non-volatile recording media, such as flash memory, can be used.

[0248] (Configuration – Configuration details of the outer cover)

[0249] Please refer to the reference again immediately. Figure 5 Then, the configuration details of the outer cover 20B will be described. However, unless otherwise specified, the outer cover 20B can be manufactured in any shape using any method and material.

[0250] In specific embodiment 2, such as Figures 5 to 7As shown, the insertion hole 120B and the protective part 130B are provided in the top surface part 22B (which is the side part on the other side of the side part of the outer cover 20B opposite to the side part of the mounting surface 2B).

[0251] (Configuration – Outer Cover Configuration Details – Insertion Hole)

[0252] The insertion hole 120B is a through hole for inserting a part of the heat detection unit 110B into the heat detection space 62B and for illuminating the display light from the display unit onto the outside of the fire detection device 1B.

[0253] In this specification, the specific shape and size of the insertion hole 120B are arbitrary. In specific embodiment 2, as... Figure 6 As shown in (b), the planar shape of the insertion hole 120B is set to be approximately elliptical (or possibly a quadrilateral or other polygon). Furthermore, the diameter of the insertion hole 120B is set to a size that allows only a portion of the thermal detection unit 110B to be exposed within the thermal detection space 62B and allows display light to illuminate the exterior of the fire detection device 1B. For example, this diameter is set to be longer than the length obtained by adding the diameter of the thermal detection unit 110B to the diameter of the light guide.

[0254] Furthermore, the method of forming the insertion hole 120B is arbitrary. The insertion hole 120B is formed in a portion facing the inflow space 40B. Specifically, as follows: Figure 6 As shown in (b), the insertion hole 120B is formed in the right-side portion of the top surface portion 22B. In this case, for example, the thermal detection unit 110B and the display unit can be mounted in the insertion hole 120B or a portion near it corresponding to a portion of the substrate 100B. According to this forming method, there are a few limitations on the attachment of the thermal detection unit 110B and the display unit compared to the case where the insertion hole 120B is formed in the center portion of the top surface portion 22B. Therefore, the attachment properties of the thermal detection unit 110B and the display unit can be maintained.

[0255] Through the insertion hole 120B, a portion of the heat detection unit 110B can be inserted into the heat detection space 62B, and the display light from the display unit can be projected onto the exterior of the fire detection device 1B through the insertion hole 120B.

[0256] (Configuration – Details of the outer cover configuration – Protected areas)

[0257] Please refer to the reference again immediately. Figure 5 The protective component 130B is a protective unit that protects the heat detection unit. For example... Figures 5 to 7As shown, the protective portion 130B provides a portion that covers the area surrounding the insertion hole 120B and the thermal detection unit 110B exposed to the outside of the fire detection device 1B. Furthermore, the protective portion 130B is configured by combining a plurality of elongated fins 131B (hereinafter referred to as "protective side fins 131B"). Specifically, as... Figures 5 to 7 As shown, the protective portion 130B provides such that the longitudinal direction of each of the plurality of protective side vents 131B is approximately along the vertical direction (in Figure 6 (b) and Figure 7 It extends slightly at an angle and is arranged perpendicularly to the lower surface of the top surface portion 22B (spaced apart therebetween).

[0258] With this configuration, the insertion hole 120B can be prevented from being exposed to the outside of the fire detection device 1B by the protective part 130B, and the design properties of the fire detection device 1B can be maintained without impairing the gas inflow properties of the protective part 130B.

[0259] (Configuration – Configuration details of the inner cover)

[0260] Next, the configuration details of the inner cover 30B will be described. However, unless otherwise specified, the inner cover 30B can be manufactured in any shape using any method and material.

[0261] In specific embodiment 2, such as Figure 8 As shown, insertion holes 140aB, 140bB, a first partition wall 150B, and a second partition wall 160B are provided in the inner cover 30B.

[0262] (Configuration – Inner Cover Configuration Details – Insertion Hole)

[0263] Insertion hole 140aB is a through hole for inserting a portion of heat detection unit 110B into heat detection space 62B, and insertion hole 140bB is a through hole for illuminating the outside of fire detection device 1B with display light from the display unit. Figure 8 As shown, the insertion holes 140aB and 140bB are respectively provided in the portion of the inner cover 30B facing the inflow space 40B and corresponding to the lower portion of the insertion hole 120B.

[0264] (Configuration – Inner Cover Configuration Details – First Divider)

[0265] The first partition wall 150B is used to separate the carbon monoxide detection space 61B, preventing gas flowing into the carbon monoxide detection space 61B from flowing out into the heat detection space 62B. For example... Figure 8 As shown, the first partition wall 150B is provided to protrude upward from the lower part of the inner cover 30B on the inside of the inner cover 30B.

[0266] Furthermore, the specific configuration of the first partition wall 150B is arbitrary. In specific embodiment 2, the first partition wall 150B is configured to surround at least a portion of the carbon monoxide detection unit and the inflow orifice 30bB within the carbon monoxide detection space 61B. Specifically, as... Figure 8 As shown, the first partition wall 150B is formed of a plate-like body with a U-shaped (or arc-shaped, etc.) planar shape (with an opening facing the outer side of the inner cover 30B), and is arranged such that a portion of the carbon monoxide detection unit, excluding a portion on the side of the outer cover body 21B, covers a portion around the outer periphery of the carbon monoxide detection unit. Figure 8 As shown in (a), even in the side portion of the inner cover 30B (hereinafter referred to as the "surrounding side portion"), a portion of the side portion protruding upward from the lower side portion (in Figure 8 (a) A cut is made on a part of the outer cover body 21B, but since the cut part covers the outer cover body 21B, it can still prevent the gas flowing into the carbon monoxide detection space 61B from flowing out to the outside through the cut part.

[0267] With this configuration, gas flowing into the carbon monoxide detection space 61B can be prevented from flowing out into the heat detection space 62B. Therefore, compared to the case where the first partition wall 150B is not provided, the detection of the heat detection unit 110B is prevented from being hindered by the flowing gas, and the accuracy of heat detection can be maintained or improved. In particular, since the first partition wall 150B is configured to surround the portion of the carbon monoxide detection unit and the inlet hole 30bB in the carbon monoxide detection space 61B, the gas flowing into the carbon monoxide detection space 61B can be effectively prevented from flowing out into the heat detection space 62B through the inlet hole 30bB, and the accuracy of heat detection is easily maintained. In this specification, the statement that "the detection of the heat detection unit 110B is stopped by the inflowing gas" corresponds to, for example, the fact that when the gas flowing in from the carbon monoxide detection space 61B flows out from the heat detection space 62B (i.e., when an airflow is generated from the carbon monoxide detection space 61B side to the heat detection unit 110B), the external atmosphere is disturbed by the airflow and does not directly reach the heat detection space 62B and the heat detection unit 110B; the fact that when the permeability of the heat detection space 62B is increased by the gas flowing in from the carbon monoxide detection space 61B, even if hot external atmosphere flows into the heat detection space 62B, the external atmosphere can still easily blow through it; and therefore the time that the external atmosphere stays in the heat detection space 62B is shortened, etc.

[0268] (Configuration – Inner Cover Configuration Details – Second Divider)

[0269] The second partition wall 160B is used to separate the thermal detection space 62B to prevent gas flowing into the inflow space 40B from flowing out into the thermal detection space 62B. For example... Figure 8 As shown, the second partition wall 160B is provided to protrude downward from the lower part of the inner cover 30B on the outside of the inner cover 30B.

[0270] Furthermore, the specific configuration of the second partition wall 160B is arbitrary. In specific embodiment 2, the second partition wall 160B is configured to surround at least a portion of the insertion holes 120B, 140aB, and the heat detection unit 110B in the inflow space 40B. Specifically, as Figure 8 As shown, the second partition wall 160B is formed of a tubular body (e.g., a cylinder, a square tube, etc.) and is configured such that the entire outer periphery of each of the insertion hole 120B, the insertion hole 140aB, and the heat detection unit 110B is covered by the second partition wall 160B. Furthermore, since the vertical length of the second partition wall 160B is set to be approximately the same as the vertical length of the inflow space 40B, and the second partition wall 160B is configured such that its lower end contacts the top surface portion 22B, gas flowing into the inflow space 40B is prevented from flowing out into the heat detection space 62B through the gap between the lower end of the second partition wall 160B and the top surface portion 22B.

[0271] With this configuration, gas flowing into the inflow space 40B can be prevented from flowing out into the thermal detection space 62B. Therefore, compared to the case without the second partition wall 160B, the detection of the thermal detection unit 110B can be prevented from being hindered by the flowing gas, and thermal detection accuracy can be maintained or improved. In particular, since the second partition wall 160B is configured to surround the entire periphery of the insertion holes 120B, 140aB, and each of the thermal detection units 110B in the inflow space 40B, gas flowing into the inflow space 40B can be effectively prevented from flowing out into the thermal detection space 62B through the insertion holes 120B or 140aB, and thermal detection accuracy is easily maintained. In this specification, the statement that "the detection of the heat detection unit 110B is stopped by the inflowing gas" corresponds to, for example, the fact that when the gas flowing in from the inflow space 40B flows out from the heat detection space 62B (i.e., when an airflow is generated from the side of the inflow space 40B to the heat detection unit 110B), the external atmosphere is disturbed by the airflow and does not directly reach the heat detection space 62B and the heat detection unit 110B; the fact that when the permeability of the heat detection space 62B is increased by the gas flowing in from the inflow space 40B, even if the external atmosphere containing heat flows into the heat detection space 62B, the external atmosphere can still easily blow through during the period; and therefore the time that the external atmosphere stays in the heat detection space 62B is shortened, etc.

[0272] (Configuration – Inner Cover Configuration Details – Other Configurations)

[0273] Furthermore, the method of forming the first partition wall 150B and the second partition wall 160B is arbitrary. In specific embodiment 2, the first partition wall 150B, the second partition wall 160B, and the inner cover 30B are integrally formed together. For example, these parts can be integrally formed by injection molding a resin material with light-shielding properties. In this way, compared with the case where the first partition wall 150B and the second partition wall 160B are formed separately from the inner cover 30B, the time and effort of attaching the first partition wall 150B and the second partition wall 160B to the inner cover 30B can be saved, and the manufacturability of the fire detection device 1B can be improved. In addition, the number of parts of the fire detection device 1B can be reduced, and the environmental burden associated with the manufacture of the fire detection device 1B can be reduced. However, the present invention is not limited thereto. For example, the first partition wall 150B and the second partition wall 160B can be formed separately from the inner cover 30B, and the first partition wall 150B and the second partition wall 160B can be connected to the inner cover 30B by fixing tools, assembly structures, etc.

[0274] (Regarding the operation of fire detection devices)

[0275] Next, the operation of the fire detection device 1B configured as described above will be explained.

[0276] That is, for example, when gas existing outside the fire detection device 1B flows into the carbon monoxide detection space 61B through the inflow space 40B and the inflow hole 30bB while the fire detection device 1B is attached to the mounting surface 2B, the first partition wall 150B prevents the gas that has flowed in from moving into the space outside the carbon monoxide detection space 61B inside the inner cover 30B. Therefore, the gas that has flowed in can be prevented from flowing out into the heat detection space 62B.

[0277] Furthermore, for example, when gas existing outside the fire detection device 1B flows into the inflow space 40B, the second partition wall 160B prevents the gas from moving into the interior space of the inflow space 40B. Therefore, the gas that has flowed in can be prevented from flowing out into the heat detection space 62B.

[0278] (Effect of specific embodiment 2)

[0279] As mentioned above, according to specific embodiment 2, the enclosure includes an inflow space 40B, a carbon monoxide detection space 61B, and a smoke detection space 63B for detecting the first detection target contained in gas flowing in from the outside of the enclosure; a heat detection space 62B located outside the enclosure for detecting the second detection target; and a first partition wall 150B and a second partition wall 160B provided in the enclosure to separate the inflow space 40B, the carbon monoxide detection space 61B, or the heat detection space 62B, so as to prevent gas flowing into the inflow space 40B or the carbon monoxide detection space 61B from flowing out into the heat detection space 62B, thus preventing gas flowing into the inflow space 40B or the carbon monoxide detection space 61B from flowing out into the heat detection space 62B. Therefore, compared to the case where the first partition wall 150B and the second partition wall 160B are not provided, the detection of the second detection target by the heat detection unit 110B can be prevented from being stopped by the inflowing gas, and the detection accuracy of the second detection target can be maintained or improved.

[0280] Furthermore, since the insertion holes 120B and 140aB are provided in a portion of the inflow space 40B facing the housing, a portion of the thermal detection unit 110B is inserted into the thermal detection space 62B, and the second partition wall 160B is configured to surround at least this portion of the inflow space 40B, including the insertion holes 120B, 140aB, and the thermal detection unit 110B, the gas flowing into the inflow space 40B can be effectively prevented from flowing out into the thermal detection space 62B through the insertion holes 120B and 140aB, and the detection accuracy of the second detection target can be easily maintained.

[0281] Furthermore, since the inlet hole 30bB is provided in the housing, and the carbon monoxide detection unit is used to detect the first detection target, and the partition wall 150B is configured to surround at least a portion of the carbon monoxide detection unit and the inlet hole 30bB in the carbon monoxide detection space 61B, the gas flowing into the carbon monoxide detection space 61B can be effectively prevented from flowing out into the heat detection space 62B through the inlet hole 30bB, and the detection accuracy of the second detection target can be easily maintained.

[0282] Furthermore, since the inner cover 30B, the first partition wall 150B, and the second partition wall 160B are integrally formed, compared to the case where the inner cover 30B and the first partition wall 150B and the second partition wall 160B are formed separately, the time and effort required to attach the first partition wall 150B and the second partition wall 160B to the inner cover 30B can be saved, and the manufacturability of the fire detection device 1B can be improved. In addition, the number of parts in the fire detection device 1B can be reduced, and the environmental burden associated with the manufacture of the fire detection device 1B can be reduced.

[0283] Furthermore, since the first detection target is smoke or carbon monoxide, and the second detection target is heat, the flow of gas containing smoke or carbon monoxide into the heat detection space 62B can be prevented, and the accuracy of heat detection can be maintained or improved. [Specific Implementation Example 3]

[0285] Next, a fire detection device according to specific embodiment 3 will be described. Specific embodiment 3 corresponds to a mode including a cover unit as described below for covering at least a portion of the area surrounding a detection unit as described below.

[0286] (Configuration)

[0287] First, the configuration of the fire detection device according to specific embodiment 3 will be described. Figure 9 This is a side view illustrating the attached state of the fire detection device according to specific embodiment 3. Figure 10 The diagram illustrates the fire detection device with the attached base removed as described below. Figure 10 (a) is a plan view and Figure 10 (b) Bottom view. Figure 11 Along Figure 10 (b) The cross-sectional view obtained by the AA line. Figure 12 Along Figure 10 (b) The cross-sectional view obtained from the BB line. In the following description, Figure 9 The X direction refers to the left and right directions of the fire detection device (+X direction is the left direction of the fire detection device and –X direction is the right direction of the fire detection device). Figure 10 The Y direction refers to the forward and backward direction of the fire detection device (+Y direction is the forward direction of the fire detection device and –Y direction is the backward direction of the fire detection device), and Figure 9 The Z direction refers to the vertical direction of the fire detection device (+Z direction is the upward direction of the fire detection device and –Z direction is the downward direction of the fire detection device).

[0288] Fire detection device 1C, such as Figure 9 The example shown is installed on the mounting surface 2C on the lower surface of the ceiling portion of the building's interior, and as illustrated... Figures 9 to 12 The example includes an attachment base 10C, an outer cover 20C, an inner cover 30C, an inflow space 40C, an insect screen 50C, a first detection space 61C, a second detection space 62C, a detector cover 70C, a detector body 80C, a terminal board 90C, and a substrate 100C.

[0289] (Configuration – Base Included)

[0290] Please refer to the reference again immediately. Figure 9 The attachment base 10C is an attachment unit that attaches the outer cover 20C to the mounting surface 2C. The attachment base 10C uses a configuration such as known attachment bases for this fire detection device (e.g., a generally plate-shaped attachment base made of resin), and as... Figure 9 The example shown is fixed to the mounting surface 2C by a fixing tool or the like.

[0291] (Configuration – Outer Cover)

[0292] The outer cover 20C covers the inner cover 30C, the inflow space 40C, the insect-proof net 50C, the first detection space 61C, the detector cover 70C, the detector body 80C, the terminal board 90C, and the substrate 100C. The outer cover 20C is formed of, for example, a resin material with light-shielding properties, and as... Figures 9 to 11 The example shown includes an outer cover body 21C, a top surface portion 22C, a first wing portion 23C, and a second wing portion 24C.

[0293] Among these components, the outer cover body 21C is the basic structure of the outer cover 20C. The outer cover body 21C is formed, for example, a generally hollow cylinder (with openings on its upper and lower surfaces); it is positioned such that the upper end portion of the outer cover body 21C is as follows: Figure 9 The example shown is that it contacts the lower surface of the attachment base 10C; and is fixed to the attachment base 10C by an assembly structure (or fixing tool) or the like.

[0294] Furthermore, the top surface portion 22C is a partition unit that separates the inflow space 40C. The top surface portion 22C is formed, for example, a generally circular plate-like body; such as... Figures 9 to 11 The portion shown is generally horizontally provided below the outer cover body 21C; and is provided facing the second detection space 62C. The top surface portion 22C corresponds to the "facing sideportion" in the claims.

[0295] Furthermore, the first convex wing 23C is a partition unit that separates the inflow space 40C. The first convex wing 23C is formed of a generally plate-like body and is provided vertically between the outer cover body 21C and the top surface portion 22C. Specifically, as Figure 9 and Figure 11 As shown, a plurality of first convex wing portions 23C are provided radially from near the center of the outer cover 20C and are connected to the outer cover body 21C and the top surface portion 22C.

[0296] Furthermore, the second convex wing 24C is a partition unit that separates the inflow space 40C. The second convex wing 24C is formed of a generally plate-like body and is provided vertically between the outer cover body 21C and the top surface portion 22C. Specifically, as Figure 9 and Figure 11 As shown, a plurality of second convex portions 24C are provided between the inner end portions of adjacent first convex portions 23C and are connected to the outer cover body 21C and the top surface portion 22C. The configuration details of the outer cover 20C will be described below.

[0297] (Configuration – Inflow Space)

[0298] Please refer to the reference again immediately. Figure 9 The inflow space 40C is a space used to allow gas containing the first detection target (specifically smoke) to flow from the outside of the fire detection device 1C into the fire detection device 1C. Multiple inflow spaces 40C are formed inside the outer cover 20C. Specifically, as... Figure 9 and Figure 11 As shown, the space surrounded by the top surface portion 22C, the first convex wing portion 23C, the second convex wing portion 24C, and the inner cover 30C in the internal space of the outer cover 20C forms an inflow space 40C.

[0299] (Configuration – Inner Cover)

[0300] The inner cover 30C covers the first detection space 61C, the detector cover 70C, the detector body 80C, and the substrate 100C, and is a partition unit separating the inflow space 40C. The inner cover 30C is, for example, a generally hollow cylinder (with an opening on its upper surface); formed of a resin material with light-shielding properties; and provided to allow the lower part of the inner cover 30C to... Figure 11 As shown, the inflow space 40C on the inside of the outer cover 20C faces the top surface portion 22C of the outer cover 20C.

[0301] In addition, such as Figure 11 As shown, a first opening 30aC is provided in the lower surface of the inner cover 30C. The first opening 30aC is used to deliver gas flowing into the inflow space 40C to the opening of the first detection space 61C, and as... Figure 11 The example shown is provided at approximately the center of the lower surface of the inner cover 30C and its vicinity. Details of the configuration of the inner cover 30C will be described below. Furthermore, a portion comprising the aforementioned "outer cover 20C" and "inner cover 30C" corresponds to the "housing" as defined in the claims.

[0302] (Configuration – First Probe Space)

[0303] The first detection space 61C is the space used to detect the first detection target. For example... Figure 11As shown, the space surrounded by the detector cover 70C and the detector body 80C located inside the inner cover 30C forms the first detection space 61C.

[0304] (Configuration – Second Probe Space)

[0305] The second detection space, 62C series, is used to detect the second detection target (specifically, its heat). For example... Figure 11 As shown, a second detection space 62C is formed in the space located outside the outer cover 20C, near the insertion hole 120C as described below.

[0306] (Configuration – Detector Cover)

[0307] The detector cover 70C is a partition unit separating the first detection space 61C, and also an incident suppression unit suppressing ambient light from entering the first detection space 61C. The detector cover 70C is a generally hollow cylinder (with an opening on its upper surface) and is formed of a resin material with light-shielding properties. Furthermore, as... Figure 11 As shown, the detector cover 70C is configured such that the lower surface of the detector cover 70C faces the top surface portion 22C of the outer cover 20C through the first opening 30aC and the inflow space 40C inside the inner cover 30C, and is fixed to the detector body 80C by an assembly structure, etc. Furthermore, as... Figure 11 As shown, a second opening 70aC is formed in the lower surface of the detector cover 70C. The second opening 70aC is an opening for allowing gas supplied from the first opening 30aC to flow into the first detection space 61C, and as... Figure 11 The example shown is provided at a portion of the first opening 30aC on the lower surface of the corresponding detector cover 70C.

[0308] (Configuration – Insect Net)

[0309] Insect net 50C is a net used to prevent insects present outside the fire detection device 1C from entering the first detection space 61C. Insect net 50C uses a circular mesh configuration and, as... Figure 11 The example shown is attached to the detector cover 70C.

[0310] (Configuration – Detector Body)

[0311] The detector body 80C is an attachment unit to the detector cover 70C, and also an incident suppression unit for suppressing ambient light from entering the first detection space 61C. The detector body 80C is formed of, for example, a resin material with light-shielding properties; and is configured as follows: Figure 11The detector body 80C is illustrated on its upper surface and is fixed to the substrate 100C by means of a fixing tool or the like. Furthermore, the detector body 80C has a support member (not shown) for supporting each of the first light-emitting unit (described below), the second light-emitting unit (described below), and the light-receiving unit (described below). Moreover, each optical path hole (not shown) for forming an optical path between the first detection space 61C and each of the first light-emitting unit (described below), the second light-emitting unit (described below), and the light-receiving unit (described below) is formed in the detector body 80C.

[0312] (Configuration – Terminal Board)

[0313] Terminal board 90C is a housing unit that houses the inner cover 30C, detector cover 70C, detector body 80C, and substrate 100C. Terminal board 90C has a generally hollow cylindrical shape (with an opening on its lower surface) and is formed of, for example, a resin material with light-shielding properties. Furthermore, such as... Figure 11 As shown, the terminal board 90C is provided to cover the inner cover 30C, the detector cover 70C, the detector body 80C, and the substrate 100C from above; it is fixed to the outer cover 20C by an assembly structure, etc.; and it is fixed to the attachment base 10C by a fixing tool, etc. through a first attachment hole 91aC formed in the attachment member 91C.

[0314] (Configuration – Substrate)

[0315] The substrate 100C is a mounting unit on which various circuits (not shown) are embedded. The substrate 100C uses, for example, a known flat circuit board configuration; such as... Figure 11 The device is arranged horizontally at a distance from the upper and lower ends of the terminal plate 90C as illustrated in the example; and is fixed to the terminal plate 90C by a fixing tool through an attachment hole (not shown) formed in the terminal plate 90C and a second attachment hole 91bC formed in the attachment member 91C.

[0316] In addition to the fact that known electronic components used in conventional fire detection devices 1C are mounted on substrate 100C, such as Figure 11 and Figure 12 As shown, the first light-emitting unit (not shown), the second light-emitting unit (not shown), the light-receiving unit (not shown), the thermal detection unit 110C, the display unit (not shown), the communication unit (not shown), the power supply unit (not shown), the control unit (not shown), and the storage unit (not shown) are mounted on the substrate 100C.

[0317] (Configuration – substrate – first light-emitting unit, second light-emitting unit, and light-receiving unit)

[0318] In these units, the first light-emitting unit is illuminated by a probe light (hereinafter referred to as "first probe light") in the first detection space 61C, and is configured using, for example, a known light-emitting element (such as an infrared LED). Furthermore, the second light-emitting unit is illuminated by a probe light (hereinafter referred to as "second probe light") with a wavelength different from the first probe light, and is configured using, for example, a known light-emitting element (such as a blue LED). Additionally, the light-receiving unit is configured to receive scattered light from the first probe light illuminating the first light-emitting unit due to smoke, output a first light-receiving signal based on the received scattered light, receive scattered light from the second probe light illuminating the second light-emitting unit regarding smoke, and output a second light-receiving signal based on the received scattered light, and is configured using, for example, a known light-receiving element (such as a photodiode). Furthermore, the method of installing the first light-emitting unit, the second light-emitting unit, and the light-receiving unit is arbitrary. In specific embodiment 3, the mounting is configured to avoid directly receiving the first or second detection light irradiated from the first or second light-emitting unit onto the light-receiving unit through various optical path holes of the detector body 80C. For example, the first light-emitting unit and the light-receiving unit are mounted at an angle of approximately 135 degrees between the optical axis of the first light-emitting unit (hereinafter referred to as the "first light-emitting side optical axis") and the optical axis of the light-receiving unit (hereinafter referred to as the "light-receiving side optical axis"). Furthermore, the second light-emitting unit and the light-receiving unit are mounted at an angle of approximately 90 degrees between the optical axis of the second light-emitting unit (hereinafter referred to as the "second light-emitting side optical axis") and the light-receiving side optical axis.

[0319] (Configuration – Substrate – Thermal Detection Unit)

[0320] Furthermore, the thermal detection unit 110C is a detection unit that detects the second target object. The thermal detection unit 110C is configured using, for example, a known thermal detection element (such as a thermistor), and is arranged such that a portion of the thermal detection unit 110C is as follows: Figure 12 As shown, the detector is inserted into (set in) the second detection space 62C through the insertion hole (not shown) provided in the detector body 80C, the insertion hole 161C of the detector cover 70C described below, the insertion hole 141C of the inner cover 30C described below, and the insertion hole 120C of the outer cover 20C described below.

[0321] (Configuration – substrate – display unit, communication unit, and power supply unit)

[0322] Furthermore, the display unit is a display unit that displays predetermined information (such as information indicating whether a fire has been detected) by irradiating light (hereinafter referred to as "display light") onto the outside of the fire detection device 1C, and is configured using, for example, a known display unit (LED, etc.). Moreover, the light projection method of the display unit is arbitrary. Examples include light projection of the display light from the display unit directed toward the outside of the fire detection device 1C through an insertion hole (not shown) provided in the detector body 80C, an insertion hole 162C of the detector cover 70C described below, an insertion hole 142C of the inner cover 30C described below, and a light guide (not shown) inserted into an insertion hole 120C of the outer cover 20C described below. Furthermore, the communication unit is a communication unit for communicating with external devices (such as receivers, etc.). Furthermore, the power supply unit is a power supply unit that supplies power from commercial power or batteries (not shown) to each unit of the fire detection device 1C.

[0323] (Configuration – Baseboard – Control Unit and Storage Unit)

[0324] Furthermore, the control unit is the control unit for controlling the fire detection device 1C. Specifically, the control unit includes a CPU and an internal memory (e.g., RAM for storing various programs to be decoded and executed on the CPU, including a basic control program, such as an OS; and an application program that is launched on the OS to perform a specified function), a program, and various data. In addition, the storage unit is a storage unit for storing the programs and various data required for the operation of the fire detection device 1C. This storage unit is configured using rewritable recording media. For example, non-volatile recording media, such as flash memory, can be used.

[0325] (Configuration – Configuration details of the outer cover)

[0326] Please refer to the reference again immediately. Figure 9 Then, the configuration details of the outer cover 20C will be described. However, unless otherwise specified, the outer cover 20C may be manufactured in any shape using any method and material.

[0327] In specific embodiment 3, such as Figures 9 to 12 As shown, the insertion hole 120C and the protective part 130C are provided in the top surface portion 22C of the outer cover 20C.

[0328] (Configuration – Outer Cover Configuration Details – Insertion Hole)

[0329] The insertion hole 120C is a through hole used to insert a part of the heat detection unit 110C into the second detection space 62C and to illuminate the outside of the fire detection device 1C with the display light from the display unit.

[0330] In this specification, the specific shape and size of the insertion hole 120C are arbitrary. In specific embodiment 3, as... Figure 10 As shown in (b), the planar shape of the insertion hole 120C is set to be approximately elliptical (or may be a quadrilateral or other polygon). Furthermore, the diameter of the insertion hole 120C is set to a size that allows only a portion of the thermal detection unit 110C to be exposed to the second detection space 62C and allows display light to illuminate the exterior of the fire detection device 1C. For example, this diameter is set to be longer than the length obtained by adding the diameter of the thermal detection unit 110C to the diameter of the light guide.

[0331] Furthermore, the method of forming the insertion hole 120C is arbitrary. The insertion hole 120C is formed in a portion facing the inflow space 40C. Specifically, as follows: Figure 10 As shown in (b), the insertion hole 120C is formed in the right-side portion of the top surface portion 22C. In this case, for example, the thermal detection unit 110C and the display unit can be mounted in the insertion hole 120C or a portion near it corresponding to a portion of the substrate 100C. According to this forming method, there are a few limitations on the attachment of the thermal detection unit 110C and the display unit compared to the case where the insertion hole 120C is formed in the center portion of the top surface portion 22C. Therefore, the attachment properties of the thermal detection unit 110C and the display unit can be maintained.

[0332] According to the insertion hole 120C, a part of the heat detection unit 110C can be inserted into the second detection space 62C through the insertion hole 120C, and the display light from the display unit can be irradiated to the outside of the fire detection device 1C through the insertion hole 120C.

[0333] (Configuration – Details of the outer cover configuration – Protected areas)

[0334] The protective component 130C is a protective unit that protects the heat detection unit. For example... Figures 9 to 12 As shown, the protective portion 130C provides a portion that covers the area surrounding the insertion hole 120C and the thermal detection unit 110C exposed to the outside of the fire detection device 1C. Furthermore, the protective portion 130C is configured by combining multiple elongated fins 131C (hereinafter referred to as "protective side fins 131C"). Specifically, as... Figures 9 to 12 As shown, the protective portion 130C provides such that the longitudinal direction of each of the plurality of protective side vents 131C is approximately along the vertical direction (in Figure 10 (b) and Figure 11 It extends slightly at an angle and is set vertically about the lower surface of the top surface portion 22C (with a gap between them).

[0335] With this configuration, the insertion hole 120C can be prevented from being exposed to the outside of the fire detection device 1C by the protective part 130C, and the design properties of the fire detection device 1C can be maintained without impairing the gas inflow properties of the protective part 130C.

[0336] (Configuration – Configuration details of the inner cover)

[0337] Please refer to the reference again immediately. Figure 11 Then, the configuration details of the inner cover 30C will be explained. Figure 13 This is an example perspective view of the inner cover 30C. However, unless otherwise specified, the inner cover 30C may be manufactured in any shape using any method and material.

[0338] In specific embodiment 3, such as Figures 11 to 13 As shown, insertion holes 141C, 142C, and a first cover portion 150C are provided in the inner cover 30C.

[0339] (Configuration – Inner Cover Configuration Details – Insertion Hole)

[0340] Insertion hole 141C is a through hole used to insert a portion of thermal detection unit 110C into the second detection space 62C, and insertion hole 142C is a through hole used to illuminate the exterior of fire detection device 1C with display light from the display unit. Figure 12 and Figure 13 As shown, the insertion holes 141C and 142C are respectively provided in the portion of the inner cover 30C facing the inflow space 40C and corresponding to the lower portion of the insertion hole 120C.

[0341] (Configuration – Inner Cover Configuration Details – First Cover Section)

[0342] The first cover portion 150C is a cover unit that covers at least a portion of the area surrounding the thermal detection unit 110C, so as to prevent gas flowing into the inflow space 40C from contacting the thermal detection unit 110C. For example... Figure 12 and Figure 13 As shown, the first cover portion 150C is provided to protrude downward from the lower side portion of the inner cover 30C on the outside of the inner cover 30C.

[0343] Furthermore, the specific configuration of the first cover portion 150C is arbitrary. In specific embodiment 3, the first cover portion 150C is configured to surround at least a portion (hereinafter referred to as the "first portion") of a portion of the heat detection unit 110C located in the inflow space 40C.

[0344] Specifically, firstly, such as Figure 12 and Figure 13As shown, the first cover portion 150C is formed from a tubular body (e.g., a cylinder, a square tube, etc.) into which the heat detection unit 110C is inserted, and is configured such that the entire outer periphery of each of the insertion hole 120C, the insertion hole 141C, and the first portion of the heat detection unit 110C covers the first cover portion 150C. In this case, the inner diameter of the first cover portion 150C is arbitrary. For example, by setting the inner diameter of at least a portion of the first cover portion 150C to be approximately the same as the outer diameter of a portion into which the heat detection unit 110C is inserted (specifically, the outer diameter of the first portion along the cross-section of the XY plane), gas flowing into the inflow space 40C can be prevented from contacting the heat detection unit 110C (the inner diameter of the second cover portion 170C described below can also be set similarly). In this way, the first cover portion 150C can be configured simply, and the manufacturability of the first cover portion 150C can be improved.

[0345] Furthermore, the first cover portion 150C and the insertion hole 120C are configured such that the end portion of the first cover portion 150C on the side of the second detection space 62C ( Figure 12 The lower end portion of the first cover portion 150C is fitted to the top surface portion 22C through the insertion hole 120C. More specifically, as Figure 12 As shown, the vertical length of the first cover portion 150C is set to be approximately the same as the vertical length of the inflow space 40C. Furthermore, an assembly portion (not shown) is provided in either the lower end portion or the top surface portion 22C of the first cover portion 150C near the insertion hole 120C, and in the other of the lower end portion or the top surface portion 22C near the insertion hole 120C, and the first cover portion 150C is configured such that the assembly portion is assembled through this assembly portion. In this way, gas flowing into the inflow space 40C can be prevented from flowing in from the end portion on the side of the second detection space 62C, and it becomes easier to prevent gas flowing into the inflow space 40C from contacting the heat detection unit 110C. Furthermore, during the assembly of the fire detection device 1C, the positioning of the first cover portion 150C is facilitated, thus allowing for quick and accurate assembly.

[0346] According to the configuration of the first cover portion 150C, gas flowing into the inflow space 40C can be prevented from contacting the heat detection unit 110C, and the detection accuracy of the second detection target can be maintained or improved. In particular, since the first detection target is smoke and the second detection target is heat, gas containing smoke can be prevented from contacting the heat detection unit 110C, and the heat detection accuracy can be maintained or improved.

[0347] (Configuration – Configuration details of the detector cover)

[0348] Please refer to the reference again immediately. Figure 2 Then, the configuration details of the detector cover 70C will be explained. Figure 14 This is a perspective view of the detector cover 70C. However, unless otherwise specified, the detector cover 70C may be manufactured in any shape using any method and material.

[0349] In specific embodiment 3, such as Figure 12 and Figure 14 As shown, insertion holes 161C, 162C, and a second cover portion 170C are provided in the detector cover 70C.

[0350] (Configuration – Detector Cover Configuration Details – Insertion Hole)

[0351] Insertion hole 161C is used to insert a portion of thermal detection unit 110C into the through hole of second detection space 62C, and as follows: Figure 12 and Figure 14 The example shown is provided in a portion corresponding to the insertion hole 141C in the lower part of the detector cover 70C. Furthermore, the insertion hole 162C is a through hole for illuminating the display light from the display unit onto the exterior of the fire detection device 1C, and as illustrated... Figure 14 The example shown is provided in a portion of the insertion hole 142C in the lower part corresponding to the detector cover 70C.

[0352] (Configuration – Detector Cover Configuration Details – Second Cover Section)

[0353] The second cover portion 170C is a cover unit that covers at least a portion of the area surrounding the thermal detection unit 110C, so as to prevent gas flowing into the inflow space 40C from contacting the thermal detection unit 110C. For example... Figure 12 and Figure 14 As shown, the second cover portion 170C is provided to protrude downward from the lower side portion of the second cover portion 170C on the exterior of the second cover portion 170C.

[0354] Furthermore, the specific configuration of the second cover portion 170C is arbitrary. In specific embodiment 3, the second cover portion 170C is configured to surround at least a portion (hereinafter referred to as "second portion") of a portion of the heat detection unit 110C located inside the inner cover 30C (specifically, a portion outside the first detection space 61C on the inside of the inner cover 30C).

[0355] Specifically, firstly, such as Figure 12 and Figure 14As shown, the second cover portion 170C is formed by a tubular body (e.g., a cylinder, a square tube, etc.) into which the heat detection unit 110C can be inserted, and is configured such that the entire outer periphery of each of the insertion holes 141C, 161C, and the second portion of the heat detection unit 110C is covered by the second cover portion 170C. In this case, the inner diameter of the second cover portion 170C is arbitrary. For example, such as Figure 12 As shown, the inner diameter of the heat detection unit 110C on the near-end side of the inner diameter of the second cover portion 170C (in) Figure 12 In this design, the inner diameter of the upper side of the second cover portion 170C is set to be larger than the other inner diameter, which increases the likelihood of the heat detection unit 110C being inserted into the second cover portion 170C and facilitates a reduction in the size of the second cover portion 170C. This simplifies the configuration of the second cover portion 170C and improves its manufacturability.

[0356] Furthermore, the second cover portion 170C is configured to be fitted into the first cover portion 150C. More specifically, as... Figure 12 and Figure 14 As shown, the vertical length of the second cover portion 170C is set to be slightly shorter than (or approximately the same as) the vertical length of the inner cover 30C. Furthermore, an assembly portion (not shown) is provided in either the upper end portion of the first cover portion 150C or the lower end portion of the second cover portion 170C, and the second cover portion 170C is configured such that the assembly portion is assembled through it. This prevents gas flowing into the inflow space 40C from flowing into the boundary between the first cover portion 150C and the second cover portion 170C, and makes it easier to prevent gas flowing into the inflow space 40C from contacting the heat detection unit 110C. Furthermore, it facilitates the positioning of the second cover portion 170C during the assembly of the fire detection device 1C, thus allowing for quick and accurate assembly.

[0357] The configuration of the second cover portion 170C prevents gas flowing into the inflow space 40C from contacting the heat detection unit 110C, and maintains or improves the detection accuracy of the second detection target.

[0358] The method for forming the first cover portion 150C and the second cover portion 170C is arbitrary. In specific embodiment 3, such as... Figures 12 to 14As shown, the first cover portion 150C and the second cover portion 170C are respectively formed. However, the present invention is not limited thereto. For example, the first cover portion 150C, the second cover portion 170C, and the detector cover 70C (or inner cover 30C) can be integrally formed by injection molding of a resin material with light-shielding properties.

[0359] (Regarding the operation of fire detection devices)

[0360] Next, the operation of the fire detection device 1C configured as described above will be explained.

[0361] That is, for example, when gas existing outside the fire detection device 1C flows into the inflow space 40C while the fire detection device 1C is attached to the mounting surface 2C, the first cover portion 150C prevents the gas that has flowed in from contacting the heat detection unit 110C (specifically, this first portion). Therefore, the gas flowing into the inflow space 40C can be prevented from contacting the heat detection unit 110C.

[0362] Furthermore, when gas existing outside the fire detection device 1C flows into the inflow space 40C and then into the inner cover 30C through the first opening 30aC, the second cover portion 170C prevents the gas from contacting the heat detection unit 110C (specifically, this second portion). Therefore, the gas flowing into the inflow space 40C can be prevented from contacting the heat detection unit 110C.

[0363] (Effect of specific embodiment 3)

[0364] As mentioned above, according to specific embodiment 3, since a first detection space 61C is provided inside the housing, a second detection space 62C is provided outside the housing, and an inflow space 40C is provided inside the housing to allow gas containing the first detection target to flow into the first detection space 61C from outside the housing, and a thermal detection unit 110C is used to detect the second detection target, at least a portion of the thermal detection unit 110C is disposed in the second detection space 62C, and the first cover portion 150C and the second cover portion 170C to cover at least a portion around the thermal detection unit 110C, so as to prevent the gas flowing into the inflow space 40C from contacting the thermal detection unit 110C. Therefore, the gas flowing into the inflow space 40C can be prevented from contacting the thermal detection unit 110C, and the detection accuracy of the second detection target can be maintained or improved.

[0365] Furthermore, since each of the first cover portion 150C and the second cover portion 170C is formed by a tubular body into which the heat detection unit 110C can be inserted, the first cover portion 150C and the second cover portion 170C can be configured simply, and the manufacturability of the first cover portion 150C and the second cover portion 170C can be improved.

[0366] Furthermore, since the inner diameter of the heat detection unit 110C on the near-end side of the inner diameter of the second cover portion 170C is set to be larger than the other inner diameter, the possibility of the heat detection unit 110C being inserted into the second cover portion 170C can be increased, and the size of the second cover portion 170C can be reduced.

[0367] Furthermore, since the inner diameter of at least that portion of the first cover portion 150C is set to be approximately the same as the outer diameter of the portion where the heat detection unit 110C is inserted into the first cover portion 150C (specifically, the outer diameter of the first portion along the cross-section of the XY plane), it becomes easier to prevent the gas flowing into the inflow space 40C from contacting the heat detection unit 110C, and it becomes easier to maintain the detection accuracy of the second detection target.

[0368] Furthermore, since the insertion hole 120C for inserting the heat detection unit 110C into the second detection space 62C is provided in the top surface portion 22C of the second detection space 62C in the side portion facing the housing, and the insertion hole 120C and the first cover portion 150C are configured such that the end portion of the first cover portion 150C on the side of the second detection space 62C can be fitted to the top surface portion 22C through the insertion hole 120C, it is possible to prevent gas flowing into the inflow space 40C from flowing into the end portion on the side of the second detection space 62C, and it becomes easier to prevent the gas flowing into the inflow space 40C from contacting the heat detection unit 110C. In addition, the positioning of the first cover portion 150C is facilitated when assembling the fire detection device 1C, so the assembly work can be performed quickly and accurately.

[0369] Furthermore, since the first target object is smoke and the second target object is heat, the contact between the smoke-containing gas and the heat sensing unit 110C can be suppressed, and the heat detection accuracy can be maintained or improved.

[0370] [III] Modifications to specific embodiments

[0371] Although specific embodiments 1 to 3 of the present invention have been described above, the specific configurations and means of the present invention can be arbitrarily modified and improved within the scope of the technical concept of each invention described in the claims. Such modifications will be described below.

[0372] (A modified example of specific embodiment 1)

[0373] First, a modified example of specific embodiment 1 will be described.

[0374] (Regarding the problem to be solved and the effects of the invention)

[0375] First, the problems to be solved by this invention and the effects of this invention are not limited to the above-mentioned content, and may vary depending on the implementation environment or configuration details of this invention. In some cases, only some of the problems mentioned above may be solved, or only some of the effects mentioned above may be achieved.

[0376] (Regarding fire detection devices)

[0377] Specific embodiment 1 illustrates that the fire detection device 1A includes an inner cover 30A. However, the present invention is not limited thereto. For example, the inner cover 30A may be omitted.

[0378] (Regarding the insertion hole)

[0379] Specific embodiment 1 describes that the insertion hole 120A is formed in a portion other than the central portion of the top surface portion 22A. However, the present invention is not limited thereto. For example, the insertion hole 120A may be formed in the central portion of the top surface portion 22A.

[0380] (Regarding the protected areas)

[0381] Specific embodiment 1 illustrates that the number of mounting fins in the protective part 130A is four. However, the present invention is not limited thereto. For example, the number may be only two or only three, or it may be five or more.

[0382] Furthermore, Specific Embodiment 1 describes making the material of some of the plurality of convex wings different from the material of some of the other convex wings, and making the shape of some of the plurality of convex wings different from the shape of some of the other convex wings. However, the present invention is not limited thereto. For example, the material of some of the plurality of convex wings may be different from the material of some of the other convex wings, while the individual shapes of the plurality of convex wings may be the same. Alternatively, the individual materials of the plurality of convex wings may be the same, while the shape of some of the plurality of convex wings may be different from the shape of some of the other convex wings.

[0383] Furthermore, Specific Embodiment 1 illustrates that only the first protective side wing 131A is formed of the translucent material. However, the present invention is not limited thereto. For example, wings other than the first protective side wing 131A may be formed of the translucent material. For instance, at least one of the second protective side wing 132A, the third protective side wing 133A, or the fourth protective side wing 134A may be formed of the translucent material. Alternatively, only two or only three of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, or the fourth protective side wing 134A may be formed of the translucent material.

[0384] Furthermore, Specific Embodiment 1 illustrates that the thickness of the first protective side wing 131A, the second protective side wing 132A, the third protective side wing 133A, and the fourth protective side wing 134A is set based on the inflow or inflow direction of the airflow into the protective portion 130A. However, the present invention is not limited thereto. For example, the thickness may be set based on parameters other than the inflow volume and inflow direction of the airflow (e.g., the length of the wing installation interval).

[0385] Specific embodiment 1 illustrates that the first protective side convex wing 131A is the thickest convex wing. However, the present invention is not limited thereto. For example, the first protective side convex wing 131A may be a convex wing that is thinner than the thickest convex wing.

[0386] Furthermore, Specific Embodiment 1 illustrates that the second protective side convex wing 132A is the thinnest and narrowest convex wing. However, the present invention is not limited thereto. For example, the second protective side convex wing 132A may be the thinnest or narrowest convex wing. Alternatively, the second protective side convex wing 132A may be a convex wing that is thicker than the thinnest convex wing and wider than the narrowest convex wing.

[0387] (A modification example of specific embodiment 2)

[0388] Next, a modified example of specific embodiment 2 will be described.

[0389] (Regarding the problem to be solved and the effects of the invention)

[0390] First, the problems to be solved by this invention and the effects of this invention are not limited to the above-mentioned content, and may vary depending on the implementation environment or configuration details of this invention. In some cases, only some of the problems mentioned above may be solved, or only some of the effects mentioned above may be achieved.

[0391] (Regarding fire detection devices)

[0392] Specific embodiment 2 illustrates that the fire detection device 1B includes an inner cover 30B. However, the invention is not limited thereto. For example, the inner cover 30B may be omitted. In this case, a first partition wall 150B and a second partition wall 160B may be provided inside the outer cover 20B.

[0393] Furthermore, specific embodiment 2 illustrates that the fire detection device 1B includes the carbon monoxide detection unit. However, the present invention is not limited thereto. For example, the carbon monoxide detection unit may be omitted. In this case, the first partition wall 150B may be omitted.

[0394] (Regarding thermal detection space)

[0395] Specific embodiment 2 illustrates that the heat detection space 62B is located outside the outer cover 20B. However, the present invention is not limited thereto. For example, the heat detection space 62B may be located inside the outer cover 20B. For instance, the heat detection space 62B may be located between the top surface portion 22B of the outer cover 20B and the inner cover 30B.

[0396] Furthermore, specific embodiment 2 illustrates that the carbon monoxide detection unit is provided at a position close to the inlet orifice 30bB. However, the invention is not limited thereto. For example, the carbon monoxide detection unit may be provided at a position spaced apart from the inlet orifice 30bB. For instance, the carbon monoxide detection unit may be provided at a position close to the insertion orifice 120B.

[0397] (Regarding the inner cover)

[0398] Specific embodiment 2 illustrates that an inflow hole 30bB is provided in the lower portion of the inner cover 30B. However, the invention is not limited thereto. For example, multiple inflow holes 30bB may be provided in a portion of the lower portion of the inner cover 30B facing the carbon monoxide detection space 61B.

[0399] (Regarding the partition wall)

[0400] Specific embodiment 2 illustrates that the first partition wall 150B is configured to surround only the portion surrounding the carbon monoxide detection unit and the inflow orifice 30bB within the carbon monoxide detection space 61B. However, the invention is not limited thereto. For example, the first partition wall 150B may be configured to surround the entire periphery of the carbon monoxide detection unit and the inflow orifice 30bB.

[0401] Furthermore, in Specific Embodiment 2, the entire periphery of the heat detection unit 110B, insertion hole 120B, and insertion hole 140aB in the inflow space 40B is surrounded. However, the invention is not limited thereto. For example, only a portion of the periphery of the heat detection unit 110B, insertion hole 120B, and insertion hole 140aB may be surrounded.

[0402] Furthermore, Specific Embodiment 2 describes the provision of a first partition wall 150B and a second partition wall 160B. However, the present invention is not limited thereto. For example, either the first partition wall 150B or the second partition wall 160B may be omitted when heat detection accuracy can be maintained.

[0403] (A modified example of specific embodiment 3)

[0404] Next, a modified example of specific embodiment 3 will be described.

[0405] (Regarding the problem to be solved and the effects of the invention)

[0406] First, the problems to be solved by this invention and the effects of this invention are not limited to the above-mentioned content, and may vary depending on the implementation environment or configuration details of this invention. In some cases, only some of the problems mentioned above may be solved, or only some of the effects mentioned above may be achieved.

[0407] (Regarding the first and second detection targets)

[0408] Specific embodiment 3 illustrates that the first detection target is smoke. However, the invention is not limited thereto. For example, the first detection target may be carbon monoxide. In this case, the carbon monoxide detection unit is provided inside the housing, instead of the first light-emitting unit, the second light-emitting unit, and the light-receiving unit. Furthermore, the first detection target may be both smoke and carbon monoxide. In this case, the carbon monoxide detection unit is provided inside the housing, instead of the first light-emitting unit, the second light-emitting unit, and the light-receiving unit.

[0409] Furthermore, specific embodiment 3 illustrates the heat of the second detection target. However, the invention is not limited thereto. For example, the second detection target may be smoke or carbon monoxide. In this case, the first light-emitting unit, the second light-emitting unit, and the light-receiving unit, or the carbon monoxide detection unit, are provided in the second detection space 62C.

[0410] (Regarding fire detection devices)

[0411] Specific embodiment 3 illustrates that the fire detection device 1C includes an inner cover 30C. However, the invention is not limited thereto. For example, the inner cover 30C may be omitted. In this case, a first cover portion 150C and a second cover portion 170C may be provided inside the outer cover 20C.

[0412] (Regarding the thermal detection unit)

[0413] Specific embodiment 3 illustrates that only a portion of the thermal detection unit 110C is disposed in the second detection space 62C. However, the invention is not limited thereto. For example, the entire thermal detection unit 110C may be accommodated.

[0414] (Regarding the second probe space)

[0415] Specific embodiment 3 illustrates that the second detection space 62C is provided on the outside of the housing. However, the invention is not limited thereto. For example, the second detection space 62C may be provided inside the housing.

[0416] (Regarding the first cover section and the second cover section)

[0417] Specific embodiment 3 illustrates that the inner diameter of the heat detection unit 110C on the near-end side of one of the inner diameters of the second cover portion 170C is set to be larger than the other inner diameter. However, the present invention is not limited thereto. For example, the inner diameters of the second cover portion 170C may be set to be uniform.

[0418] Furthermore, in Specific Embodiment 3, the first cover portion 150C is configured to cover the entire outer periphery of each of the insertion holes 120C, 141C, and the first portion of the heat detection unit 110C. However, the invention is not limited thereto, and the first cover portion 150C may be configured to cover only a portion of the outer periphery. Furthermore, in Specific Embodiment 3, the second cover portion 170C is configured to cover the entire outer periphery of each of the insertion holes 141C, 161C, and the second portion of the heat detection unit 110C. However, the invention is not limited thereto, and the second cover portion 170C may be configured to cover only a portion of the outer periphery.

[0419] Furthermore, in Specific Embodiment 3, the first cover portion 150C and the insertion hole 120C are configured such that the end portion of the first cover portion 150C on the second detection space 62C side is fitted to the top surface portion 22C through the insertion hole 120C. However, the present invention is not limited thereto. For example, the first cover portion 150C and the insertion hole 120C may be configured such that the end portion of the first cover portion 150C on the second detection space 62C side can be fitted to the top surface portion 22C without passing through the insertion hole 120C. Furthermore, in Specific Embodiment 3, the second cover portion 170C is configured to be fitted to the first cover portion 150C. However, the present invention is not limited thereto. For example, fitting to the second cover portion 170C may be prohibited.

[0420] Notes

[0421] The fire detection device in Note 1 is a fire detection device comprising a housing and a detection unit (for detecting fire inside the housing).

[0422] As in Note 2 of the fire detection device described in Note 1, the fire detection device is attached to the mounting surface of the mounting object. The fire detection device includes: a heat detection unit that detects fire, a portion of which is disposed inside the housing; the heat detection unit is configured such that another portion of which is exposed to the outside of the fire detection device through an insertion hole formed in an opposite side portion of a side portion on one side of the mounting surface relative to the side portion of the housing; and a protective unit provided to cover the area around the insertion hole in the opposite side portion and the other portion of the heat detection unit, the protective unit having a plurality of fins, wherein some of the fins are made of a different material than some of the other fins, or that some of the fins have a different shape than some of the other fins.

[0423] The fire detection device described in Note 2 and Note 3 further include: a display unit provided inside the housing, the display unit displaying predetermined information by irradiating light toward the outside of the fire detection device through the insertion hole, wherein some of the protrusions are formed of a semi-transparent material, and the protrusions are configured such that light irradiated from the display unit is guided to the outside of the fire detection device by using the protrusions formed of the semi-transparent material.

[0424] For example, the fire detection device in Note 4 of Note 2 or Note 3, wherein the thickness of the plurality of fins is set based on the inflow or inflow direction of the airflow into the protection unit.

[0425] The fire detection device of Note 5, such as any of Notes 2 to 4, wherein the fins formed using the translucent material are thicker than the thinnest of the plurality of fins.

[0426] The fire detection device of Note 6, such as any of Notes 2 to 5, wherein the insertion hole is provided in a portion other than the central portion of a portion of the opposite side portion.

[0427] For example, in the fire detection device of Note 7 of Note 6, the wing on one side of the center portion of the opposite side of the plurality of winglets is thinner than the thickest wing or narrower than the widest wing.

[0428] The fire detection device, as described in Note 8 of Note 1, further comprises: a first detection space for detecting a first detection target contained in a gas flowing in from the outside of the housing on the interior of the housing; a second detection space located on the interior or exterior of the housing, the second detection space being configured to detect a second detection target; and a partition wall provided in the housing, the partition wall being configured to separate the first detection space or the second detection space to allow gas flowing into the first detection space to flow out into the second detection space.

[0429] As in Note 9 of the fire detection device described in Note 8, the first detection space includes: a first detection space body in which the detection of the first detection target is performed; and an inflow space for allowing gas containing the first detection target to flow into the first detection space body. The fire detection device further includes an insertion hole provided in a portion of the inflow space in a portion facing the housing for inserting a portion of a second detection target detection unit for detecting a second detection target disposed in the housing into the second detection space, and the partition wall is configured to surround at least a portion of the second detection target detection unit in the inflow space and the insertion hole.

[0430] The fire detection device, as described in Note 8 and Note 10, further comprises: an inlet provided in the housing to allow gas containing the first detection target to flow into the first detection space; and a first detection target detection unit that detects the first detection target, the first detection target detection unit being disposed in the first detection space, wherein the partition wall is configured to surround at least a portion of the first detection target detection unit and the inlet in the first detection space.

[0431] The fire detection device of Note 11, such as any of Notes 8 to 10, wherein the housing and the partition wall are integrally formed together.

[0432] The fire detection device of Note 12, such as any of Notes 8 to 11, wherein the first detection target is smoke or carbon monoxide, and the second detection target is heat.

[0433] The fire detection device, as described in Note 13 of the fire detection device in Note 1, further comprises: a first detection space located inside the housing for detecting a first detection target; a second detection space located inside or outside the housing for detecting a second detection target; an inflow space located inside the housing to allow gas containing the first detection target to flow into the first detection space from outside the housing; a detection unit for detecting the second detection target, the detection unit being provided such that at least a portion of the detection unit is disposed in the second detection space; and a cover unit covering at least a portion of the periphery of the detection unit, thereby allowing gas flowing into the inflow space to be prevented from contacting the detection unit.

[0434] Such as the fire detection device in Note 13 and the fire detection device in Note 14, wherein the cover unit is formed of a tubular body that allows the detection unit to be inserted therein.

[0435] For example, the fire detection device of Note 14 and the fire detection device of Note 15, wherein the inner diameter of the detection unit on the near-end side of the inner diameter of the cover unit is set to be larger than the other inner diameter.

[0436] The fire detection device, such as the fire detection device in Note 14 or Note 15, and the fire detection device in Note 16, wherein the inner diameter of at least a portion of the cover unit is set to be substantially the same as the outer diameter of a portion into which the detection unit is inserted.

[0437] The fire detection device of Note 17, such as any of Notes 14 to 16, wherein an insertion hole for inserting the detection unit into the second detection space is provided in the facing side portion of the second detection space in the side portion facing the housing, and the insertion hole and the cover unit are configured to allow the end portion of the cover unit on one side of the second detection space to be fitted into the facing side portion through the insertion hole.

[0438] The fire detection device of Note 18, such as any of Notes 13 to 17, wherein the first detection target is smoke or carbon monoxide, and the second detection target is heat.

[0439] Beneficial effects of the notes

[0440] As in the fire detection device described in Note 1, since the unit for detecting fire is provided inside the housing, fire can be detected inside the housing and can effectively detect whether a fire has occurred.

[0441] As in the fire detection device described in Note 2, because some of the plurality of protrusions are made of a different material than the others, for example, light irradiated from the display unit housed in the housing can be guided to the outside of the fire detection device through these protrusions and the insertion hole by using a translucent material to form only these protrusions. Therefore, since there is no need in the art to provide a display hole in the housing for guiding light irradiated from the display unit to the outside, the design properties of the fire detection device can be maintained compared to conventional technology (where the protector and the display hole are exposed to the outside). Furthermore, because the shape of some of the plurality of protrusions is different from the shape of the others, when the plurality of protrusions are formed in the same shape, it is easier to uniformly distribute the airflow into the housing from each direction according to the installation state of the fire detection device. Therefore, the airflow characteristics in the fire detection device can be improved.

[0442] As in the fire detection device described in Note 3, since some of the protrusions are formed of a translucent material and the protrusions are configured such that light irradiated from the display unit is guided to the outside of the fire detection device by using the protrusions formed of the translucent material, some of the protrusions of the protective unit can be used as light guides, while ensuring the strength of the protective unit and the light irradiated from the display unit can be easily visually identified in various directions.

[0443] As in the fire detection device described in Note 4, since the thickness of the plurality of protrusions is set based on the inflow or inflow direction of the airflow into the protection unit, the thickness of the plurality of protrusions can be set based on the inflow or inflow direction of the airflow into the protection unit, and the inflow characteristics of the airflow into the protection unit can be ensured, while maintaining the durability of the protection unit.

[0444] As in the fire detection device described in Note 5, since the fins formed using this translucent material are thicker than the thinnest of the plurality of fins, light emanating from the display unit is easily guided to the outside of the fire detection device, while suppressing damage to the fins formed using this translucent material. Therefore, the display function of the fire detection device can be further maintained, while the durability of the fins formed using this translucent material can be improved.

[0445] As in the fire detection device described in Note 6, since the insertion hole is provided in a portion other than the center portion of one portion of the opposite side portion, there are some limitations to the attachment of the heat detection unit and the display unit compared to the case where the insertion hole is formed in the center portion of the opposite side portion. Therefore, the attachment nature of the heat detection unit and the display unit can be maintained.

[0446] As in the fire detection device described in Note 7, since one of the plurality of protrusions is thinner or narrower than the thickest or widest of the plurality of protrusions on one side of the center portion of the opposite side portion, it becomes easier to homogenize the airflow into the protective unit from each direction when the insertion hole is provided at a location other than the center portion of the opposite side portion. Therefore, the airflow characteristics of the protective unit can be improved.

[0447] As described in Note 8, the fire detection device includes a first detection space inside the housing for detecting a first detection target contained in a gas flowing in from outside the housing; a second detection space located outside the housing for detecting a second detection target; and a partition wall provided within the housing to separate the first detection space from the second detection space, thereby preventing gas flowing into the first detection space from flowing out into the second detection space. Therefore, compared to the case without the partition wall, the detection of the second detection target by the detection unit is prevented from being blocked by the flowing gas, and the detection accuracy of the second detection target can be maintained or improved.

[0448] As in the fire detection device described in Note 9, since it includes an insertion hole provided in a portion of the inflow space in a part facing the housing, for inserting a portion of a second detection target detection unit into the second detection space, and the partition wall is configured to surround at least a portion of the second detection target detection unit in the inflow space and the insertion hole, it can effectively prevent gas flowing into the inflow space from flowing out into the second detection space through the insertion hole, and easily maintain the detection accuracy of the second detection target.

[0449] As in the fire detection device described in Note 10, since it includes an inlet hole provided in the housing; and a first detection target detection unit that detects the first detection target, and the partition wall is configured to surround at least a portion of the first detection target detection unit and the inlet hole in the first detection space, it can effectively prevent gas flowing into the first detection space from flowing out into the second detection space through the inlet hole, and easily maintain the detection accuracy of the second detection target.

[0450] As in the fire detection device described in Note 11, since the housing and the partition wall are integrally formed, the time and effort required to attach the partition wall to the housing can be saved compared to the case where the housing and the partition wall are formed separately, thus improving the manufacturability of the fire detection device. Furthermore, the number of parts in the fire detection device can be reduced, and the environmental burden associated with its manufacture can be decreased.

[0451] As in the fire detection device described in Note 12, since the first detection target is smoke or carbon monoxide and the second detection target is heat, it can prevent the gas containing smoke or carbon monoxide from flowing out into the second detection space and can maintain or improve the accuracy of heat detection.

[0452] The fire detection device, as described in Note 13, includes a first detection space located inside the housing; a second detection space located inside or outside the housing; an inflow space located inside the housing to allow gas containing the first detection target to flow into the first detection space from outside the housing; a detection unit that detects the second detection target, the detection unit being provided such that at least a portion of the detection unit is disposed in the second detection space; and a cover unit that covers at least a portion of the periphery of the detection unit, thereby allowing gas flowing into the inflow space to be prevented from contacting the detection unit, thus preventing gas flowing into the inflow space from contacting the detection unit and maintaining or improving the detection accuracy of the second detection target.

[0453] As in the fire detection device described in Note 14, since the cover unit is formed of a tubular body that allows the detection unit to be inserted therein, the cover unit can be simply configured and the manufacturability of the cover unit can be improved.

[0454] As in the fire detection device of Note 15, since the inner diameter of the detection unit on the near-end side of the inner diameter of the cover unit is set to be larger than the other inner diameter, the probability of the detection unit being inserted into the cover unit is increased, and the size of the cover unit is reduced.

[0455] As in the fire detection device described in Note 16, since the inner diameter of at least a portion of the cover unit is set to be approximately the same as the outer diameter of a portion into which the detection unit is inserted, it becomes easier to prevent gas flowing into the inflow space from contacting the detection unit and to maintain the detection accuracy of the second detection target.

[0456] As in the fire detection device described in Note 17, since the insertion hole for inserting the detection unit into the second detection space is provided in the facing side portion of the second detection space on the side portion facing the housing, and the insertion hole and the cover unit are configured to allow the end portion of the cover unit on one side of the second detection space to be fitted to the facing side portion through the insertion hole, gas flowing into the inflow space can be prevented from flowing in from the end portion on the side of the second detection space, and it becomes easier to prevent gas flowing into the inflow space from contacting the detection unit. Furthermore, the cover unit facilitates positioning during the assembly of the fire detection device, thus allowing for quick and accurate assembly.

[0457] As in the fire detection device described in Note 18, since the first detection target is smoke or carbon monoxide and the second detection target is heat, the contact between the smoke-containing gas and the sensing unit can be suppressed, and the accuracy of heat detection can be maintained or improved.

Claims

1. A fire detection device for detecting fires in a monitored area, the fire detection device being attached to a mounting surface of a mounting object, the fire detection device comprising: A shell; A heat detection unit is configured such that at least a portion of the heat detection unit protrudes from an insertion hole on the side of the housing facing the monitored area and is exposed to the monitored area side, the heat detection unit detecting heat associated with fire; A protective unit has a plurality of protruding wings perpendicularly disposed on a surface of the housing facing the monitored area to cover the area around the thermal detection unit exposed to the monitored area and the insertion hole. The protective unit protects the thermal detection unit through the plurality of protruding wings. The plurality of protruding wings includes a first protective side wing, a second protective side wing, a third protective side wing, and a fourth protective side wing. The first, second, third, and fourth protective side wings are provided adjacent to the insertion hole. The first protective side wing is disposed within the insertion hole. The third protective wing is located on the upper right side and at the outer periphery of the center of the surface furthest from the monitored area; the fourth protective wing is located on the upper left side of the insertion hole and at the center of the surface closest to the monitored area; the fifth protective wing is located on the upper front and right side of the insertion hole; and the sixth protective wing is located on the upper rear and right side of the insertion hole. The third and fourth protective wing are located at the center of the surface closer to the monitored area than the first protective wing and at the center of the surface furthest from the monitored area than the second protective wing. A connecting unit is connected to a portion near one end of the plurality of protruding wings; the connecting unit connects the plurality of protruding wings; and A display unit is disposed inside the housing, which displays predetermined information by illuminating a display light toward the monitored area; The first protective side wing is made of a semi-transparent material and is exposed from the inside of the fire detection device to the outside of the fire detection device through the insertion hole. The display light of the display unit is guided by the first protective side wing so that the predetermined information can be seen from the monitored area. Other convex wings of the plurality of convex wings, wherein the second protective side convex wing, the third protective side convex wing, the fourth protective side convex wing and the connecting unit are integrally formed with the outer shell using a non-transparent material, wherein the heat detection unit and the protective unit are located on the outer periphery opposite to the center area of ​​the monitored area; the thickness of the third protective side convex wing and the fourth protective side convex wing is greater than the thickness of the second protective side convex wing, and the thickness of the first protective side convex wing is greater than the thickness of the third protective side convex wing and the fourth protective side convex wing.

Images