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Fire detection device

A technology for fire detection and light detection, applied in lighting devices, fire alarms, components of lighting devices, etc., can solve problems such as affecting smoke detection, affecting the determination and disadvantage of fire in fire detectors, etc.

Pending Publication Date: 2020-12-22
HOCHIKI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Furthermore, in conventional fire detectors, regardless of whether smoke has flowed into the detection space, the detection light from the light-emitting unit enters the light-receiving unit after being reflected by elements in the shaded area (for example, labyrinth seals separating the shaded areas, etc.), thereby adversely affecting the detection of smoke and, potentially, the determination of a fire by fire detectors

Method used

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Embodiment 1

[0119] (basic concept of embodiment 1)

[0120] First, the basic concept of Embodiment 1 will be described. Embodiment 1 (mode corresponding to the first problem) generally involves scattered light detectors.

[0121] In this specification, a "scattered light detector" is a device that monitors a monitored area, and specifically monitors abnormalities in the monitored area by detecting detection targets in the monitored area using scattered light described below. For example, a scattered light detector is attached to an installation surface of an installation object, and corresponds to, for example, equipment for determining an abnormality such as a fire. For example, this "scattered light detector" is a concept that includes smoke detectors, fire detectors, and the like.

[0122] The "surveilled area" is an area of ​​an object to be monitored by the scattered light detector, specifically, a space having a certain degree, that is, an indoor or outdoor space. For example, th...

Embodiment 2

[0125] (basic concept of embodiment 2)

[0126] Then, the basic concept of Embodiment 2 will be described. Embodiment 2 (mode corresponding to the second problem) generally involves scattered light detectors.

[0127] In this specification, a "scattered light detector" is a device that monitors a monitored area, and specifically monitors abnormalities in the monitored area by detecting detection targets in the monitored area using scattered light described below. For example, a scattered light detector is attached to an installation surface of an installation object, and corresponds to, for example, a device including a light emitting unit, a light receiving unit, a light guiding unit, and a device for determining an abnormality such as a fire. For example, this "scattered light detector" is a concept that includes smoke detectors, fire detectors, and the like.

[0128] The "surveilled area" is an area of ​​an object monitored by the scattered light detector, and specificall...

Embodiment 3

[0133] (basic concept of embodiment 3)

[0134] Then, the basic concept of Embodiment 3 will be described. Embodiment 3 (mode corresponding to the third problem) generally relates to a fire detection device for detecting and reporting the occurrence of fire in a monitored area.

[0135] In this specification, in Embodiment 3, a "fire detection device" is a device that optically detects and reports the occurrence of a fire in a monitored area, and corresponds to a concept including, for example, an optical fire detector or a fire alarm. In addition, the "monitored area" is an area to be monitored, and is a concept including, for example, an area inside a building, an area outside a building, and the like. In addition, the specific structure or type of "building" is arbitrary. For example, "building" is a concept including, for example, detached houses, complex buildings such as townhouses or apartments, office buildings, event facilities, commercial facilities, public facilit...

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Abstract

This fire detection device comprises: a generation space 32A that an object of detection flows into and is provided inside a light-shielded space 3A that is shielded from outside light; a first lightemission unit 61A and second light emission unit for emitting detection light along a first light-emission-side optical axis 611A and second light-emission-side optical axis toward the generation space 32A; a light reception unit for receiving, along a light-reception-side optical axis that crosses the first light-emission-side optical axis 611A and second light-emission-side optical axis, scattered light produced by the scattering of the detection light emitted by the first light emission unit 61A and second light emission unit by the object of detection that has flowed into the generation space 32A; and a smoke-detection-unit-cover-side inclination 43A for primary reflection of the detection light emitted by the first light emission unit 61A and second light emission unit in a directioncrossing a plane defined by the first light-emission-side optical axis 611A, second light-emission-side optical axis, and light-reception-side optical axis.

Description

technical field [0001] The present invention relates to a fire detection device. [0002] This application is based on and claims No. 2018-138209 filed on July 24, 2018, No. 2018-138692 filed on July 24, 2018, and No. 2018-138210 filed on July 24, 2018 Priority and benefit of prior Japanese patent applications, the entire contents of which are hereby incorporated by reference. Background technique [0003] Conventionally, there is known a fire detector for detecting the occurrence of fire in a monitored area (for example, see Patent Document 1 to Patent Document 4). [0004] Specifically, the fire detector of Patent Document 1 includes a light emitting unit that emits detection light and a light receiving unit that receives light based on the detection light emitted from the light emitting unit. In a fire detector, scattered light generated by scattering of detection light emitted from a light emitting unit due to smoke particles in a detection space is received by a light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/53G08B17/10G08B17/107
CPCG08B17/107G01N21/53F21V7/0025G08B17/113
Inventor 岛津朋彦鹫头佳祐土肥学藤原康治高野英树
Owner HOCHIKI CORP