KR20150107130A - The device for detecting fire - Google Patents

The device for detecting fire Download PDF

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Publication number
KR20150107130A
KR20150107130A KR1020140029576A KR20140029576A KR20150107130A KR 20150107130 A KR20150107130 A KR 20150107130A KR 1020140029576 A KR1020140029576 A KR 1020140029576A KR 20140029576 A KR20140029576 A KR 20140029576A KR 20150107130 A KR20150107130 A KR 20150107130A
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KR
South Korea
Prior art keywords
light
fire
light emitting
emitting unit
light receiving
Prior art date
Application number
KR1020140029576A
Other languages
Korean (ko)
Inventor
김현진
Original Assignee
주식회사 솔루스온
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 주식회사 솔루스온 filed Critical 주식회사 솔루스온
Priority to KR1020140029576A priority Critical patent/KR20150107130A/en
Publication of KR20150107130A publication Critical patent/KR20150107130A/en

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

Abstract

The present invention relates to a fire detector capable of determining malfunction due to moisture by including an illumination sensor to sense the illumination in real time by directly receiving light emitted from a light emitting unit, and accurately detecting a fire by reflecting the natural illumination reduction element of the light emitting unit. The fire detector according to the present invention includes: the light emitting unit which generates and emits light; a light receiving sensor which is located on the side of the light emitting unit, and selectively senses the light by scattering the light emitted from the light emitting unit using scattering particles; the illumination sensor which is installed on the front side of the light emitting unit, and directly senses the light emitted from the light emitting unit; a blocking member which is installed between the light emitting unit and the light receiving sensor, and blocks the direct radiation of the light emitted from the light emitting unit to the light receiving sensor; a fire determining unit which senses the fire when light over a first light receiving amount, which is previously set, is received in the light receiving sensor, and transmits a fire generation signal; and an alarm generating unit which generates an alarm if the fire generation signal is received by the fire determining unit.

Description

FIRE DETECTOR {THE DEVICE FOR DETECTING FIRE}

The present invention relates to a fire detector, and more particularly, to a fire detector, which includes a light intensity sensor that directly receives light emitted from a light emitting unit and senses light intensity in real time, thereby determining a malfunction caused by moisture, To a fire detector capable of accurately detecting fire.

Generally, fire detectors are used in large-area buildings such as buildings and apartments, and detectors of interlocking type that operate in conjunction with a central control type disaster prevention system, detectors that operate individually in small-sized buildings such as single- There is a sensor of formula structure.

The interlocked and single smoke detectors are categorized into a temperature sensor in which the room temperature is sensed according to a sensing method and a photoelectric smoke detector in which smoke particles in the room are scattered by light. It is installed continuously on the ceiling or wall for easy sensing of temperature and smoke, and continuously detects fire. In case of fire, it generates alarm sound or self alarm sound through alarm device, .

Since the temperature sensing sensor is structurally and circuitly simple, it senses a designated temperature higher than the room temperature. Therefore, a delay time occurs until the flame reaches the temperature sensor, so that the detection efficiency at the initial stage of the fire deteriorates. It is difficult to obtain a sensing efficiency. On the other hand, the photovoltaic smoke detector detects smoke generated in the early stage of fire, so that it detects fire faster than a warm temperature sensor and obtains a uniform sensing efficiency regardless of the installation position Recently, such photoelectric type detectors have been widely used.

As shown in FIG. 1, the fire detector of the photoelectric type that detects fire using the smoke generated in the fire generally includes a light emitting portion 10, a light receiving sensor 20, a blocking member 30, . 1, when the smoke is not drawn into the housing 40 due to a fire, the light emitted from the light emitting unit 10 is blocked by the blocking member 30, 2, the smoke detector S does not operate. However, when a fire occurs as shown in FIG. 2 and the smoke S is drawn into the detector, a part of the light L emitted from the light emitting unit 10 is emitted to the smoke The light is guided to the light receiving sensor 20 while being diffused by the light source S, so that the fire detector is operated by sensing the fire.

At this time, if the amount of light sensed by the light receiving sensor 20 is greater than a predetermined value, it is determined as a fire. If the amount of light is less than a predetermined value, it is not determined as a fire.

However, in the conventional photoelectric fire detector having such a structure, not only the light is detected by the light receiving sensor only when the light is scattered by the smoke generated by the fire, but also the light which is scattered by the water droplet . Therefore, although the fire does not occur in the high humidity period such as the rainy season, the fire detector may malfunction due to the high humidity.

Also, when such a fire detector is used for a long period of time, the amount of light emitted from the light emitting part is reduced or the illuminance is naturally reduced. There is no way to operate the fire detector by reflecting this natural reduction phenomenon. There is also a problem.

An object of the present invention is to provide an illuminance sensor that directly receives light emitted from a light emitting unit and senses illuminance in real time to determine a malfunction caused by moisture, And a fire detector capable of detecting a fire.

According to an aspect of the present invention, there is provided a fire detector comprising: a light emitting unit for generating light to emit light; A light receiving sensor positioned at a side of the light emitting unit and selectively sensing light scattered by scattering particles emitted from the light emitting unit; An illuminance sensor installed on a front surface of the light emitting unit and directly sensing light emitted from the light emitting unit; A blocking member installed between the light emitting unit and the light receiving sensor and blocking the light emitted from the light emitting unit from being directly irradiated to the light receiving sensor; A fire detector for detecting a fire when the light received by the light receiving sensor exceeds a predetermined first light receiving amount and transmitting a fire occurrence signal; And an alarm generating unit for generating an alarm upon receiving the fire occurrence signal by the fire determination unit.

In the present invention, it is preferable that when the light receiving sensor receives light less than the first light receiving amount, the fire judging unit judges malfunction due to moisture and does not transmit a fire occurrence signal.

In addition, in the present invention, the illuminance sensor senses illuminance of light emitted from the light emitting unit in real time, and the fire determination unit changes the first light receiving amount value in comparison with the value sensed by the illuminance sensor .

According to the present invention, there is provided an illuminance detection sensor, which not only can operate the fire detector by reflecting the natural decrease of the light emission amount or the illuminance with the lapse of use time of the light emitting portion, but also can accurately judge the malfunction due to moisture or the like .

1 and 2 are views illustrating the structure and operation principle of a conventional photoelectric fire detector.
3 is a view showing a structure of a fire detector according to an embodiment of the present invention.
4 is a view for explaining the operation principle of a fire detector according to an embodiment of the present invention.
FIG. 5 is a diagram showing a sensing state of light when scattering due to water droplets in a fire detector according to an embodiment of the present invention. FIG.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the accompanying drawings.

3, the fire detector 100 according to the present embodiment includes a light emitting unit 110, a light receiving sensor 120, an illuminance detecting sensor 130, a blocking member 140, a fire determining unit 150, And an alarm generating unit (not shown in the figure).

As shown in FIG. 3, the light emitting unit 110 is a component installed inside the housing 160 to generate light and emit light. The light emitting unit 110 may have various structures capable of emitting light, and may be formed of, for example, an LED (Light Emitting Diode).

3, the light receiving sensor 120 is located on the side of the light emitting unit 110 in the housing 160, and the light emitted from the light emitting unit 110 is scattered particles Is a component that selectively senses scattered light. Specifically, the light receiving sensor 120 is installed at a position where the light emitted from the light emitting unit 110 can not be directly received by the blocking member 140 described later. As shown in FIG. 4, And is a component that indirectly receives light scattered by the scattering material or scattering particles S when a substance or particles S capable of scattering light is present in the housing 160.

The amount of light received by the light receiving sensor 120 is transmitted to the fire determination unit 150, which will be described later.

3, the illumination sensor 130 is installed on the front of the light emitting unit 110 in the housing 160, and detects light emitted from the light emitting unit 110 directly Lt; / RTI > That is, the illumination sensor 130 detects the light emitted from the light emitting unit 110 and detects the amount of light emitted from the light emitting unit 110 in real time. The measured value of the amount of light emitted from the light emitting unit 110 sensed in this manner is transmitted to the fire determination unit 150 described later.

3, the blocking member 140 is installed between the light emitting unit 110 and the light receiving sensor 120, and the light emitted from the light emitting unit 110 is directly incident on the light receiving sensor 110 120). Therefore, in the present embodiment, the blocking member 140 is made of a material that can completely block the light emitted from the light emitting unit 110, and the light emitted from the light emitting unit 110 is transmitted to the light receiving sensor 120, It is possible to have a variety of structures that can prevent direct irradiation.

3, the fire determination unit 150 is installed on the rear surface of the housing 110. When the light received by the light receiving sensor 120 exceeds a predetermined first light receiving amount, It is a component that transmits a fire occurrence signal. That is, in the present embodiment, the fire determination unit 150 determines whether or not a fire is generated by using information about the amount of light received by the light receiving sensor 120, generates a fire occurrence signal for the fire, An alarm generating unit or a central control room.

Hereinafter, a process for determining whether a fire has occurred in the fire determination unit 150 according to the present embodiment will be described in detail.

First, in the fire determination unit 150, a reference value for determining whether or not a fire is to be made with respect to the amount of light received by the light receiving sensor 120 is determined, which is referred to as 'first light reception amount' in this embodiment. The first light receiving amount is a value determined by a fire regulation or the like and is set to 1% or 2% of the light emitted from the light emitting unit 110, and is set to a value relative to the amount of light emitted from the light emitting unit 110 Lt; / RTI >

Since the conventional fire detector can not detect the light emitted from the light emitting unit 10 in real time, the first light receiving amount can not be determined based on the amount of emission of the light emitting unit determined at the time of initial release. Accordingly, when the amount of light emitted from the light emitting unit is reduced naturally over a predetermined time, light received by the light receiving sensor is also reduced. As a result, if the fire sensor does not replace the light emitting unit after a predetermined time, It can not function as a detector.

However, in the present embodiment, the first light reception amount value is set to a value relative to a value sensed in real time in the illumination sensor 130. Accordingly, even if the light emitted from the light emitting unit 110 decreases with the lapse of the use period, the relative value is changed in real time, so that even if the light emitted from the light emitting unit 110 decreases with time, There is an advantage to be able to.

On the other hand, when the light receiving sensor 120 receives light less than the first light receiving amount, the fire determination unit 150 determines that the fire detection signal is not transmitted due to malfunction due to moisture. 5, a certain amount L 1 is scattered by the surface of the water droplet H so that the light is scattered by the light receiving sensor, (L2) passes through the droplet (H) as it is, and is directed to the illumination sensor (130).

When the second light receiving amount value less than the first light receiving amount is received by comparing the value of the light sensed by the light intensity sensor 130 with the light received by the light receiving sensor 120, And does not generate an occurrence signal. In this case, the second light receiving amount value is a value calculated in advance by measuring the value of light scattered by moisture, and is actually smaller than the first light receiving amount value, and is input to the fire determining unit 150 in advance.

Meanwhile, the fire determination unit 150 may include a communication module (not shown) that can transmit the generated fire signal or sensing value of the illumination sensor 130 to a central monitoring center or the like by a wire / wireless communication method, As shown in FIG.

Next, the alarm generating unit (not shown in the drawing) is a component for generating an alarm when the fire determining unit 150 receives the fire occurrence signal. The alarm generator may be installed outside the fire detector 100, or may not be installed in some cases. In addition, the alarm generator may generate an alarm by various methods such as a voice signal, an emission signal, and the like.

100: a fire detector according to one embodiment of the present invention
110: light emitting unit 120: light receiving sensor
130: illuminance sensor 140: blocking member
150: fire determination unit 160: housing
L: light S: scattering particles
H: Drop of water

Claims (3)

A light emitting portion emitting light by generating light;
A light receiving sensor positioned at a side of the light emitting unit and selectively sensing light scattered by scattering particles emitted from the light emitting unit;
An illuminance sensor installed on a front surface of the light emitting unit and directly sensing light emitted from the light emitting unit;
A blocking member installed between the light emitting unit and the light receiving sensor and blocking the light emitted from the light emitting unit from being directly irradiated to the light receiving sensor;
A fire detector for detecting a fire when the light received by the light receiving sensor exceeds a predetermined first light receiving amount and transmitting a fire occurrence signal;
And an alarm generating unit for generating an alarm upon receipt of a fire occurrence signal by the fire determination unit. The fire control system according to claim 1,
Wherein when the light receiving sensor receives light having a light receiving amount less than the first light receiving amount, it is judged that the light emitting device is malfunctioning due to moisture and does not transmit a fire occurrence signal. The method according to claim 1,
The illuminance sensor senses illuminance of light emitted from the light emitting unit in real time,
Wherein the fire determination unit changes the first light reception amount value in comparison with the value detected by the illumination detection sensor.
KR1020140029576A 2014-03-13 2014-03-13 The device for detecting fire KR20150107130A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111540158A (en) * 2020-05-27 2020-08-14 深圳市泛海三江电子股份有限公司 Smoke alarm with condensation recognition function and use method
CN111540159A (en) * 2020-05-27 2020-08-14 深圳市泛海三江电子股份有限公司 Smoke alarm capable of directionally eliminating interference of condensation and use method
CN111564019A (en) * 2020-05-27 2020-08-21 深圳市泛海三江电子股份有限公司 Anti-condensation interference smoke fire detector and use method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111540158A (en) * 2020-05-27 2020-08-14 深圳市泛海三江电子股份有限公司 Smoke alarm with condensation recognition function and use method
CN111540159A (en) * 2020-05-27 2020-08-14 深圳市泛海三江电子股份有限公司 Smoke alarm capable of directionally eliminating interference of condensation and use method
CN111564019A (en) * 2020-05-27 2020-08-21 深圳市泛海三江电子股份有限公司 Anti-condensation interference smoke fire detector and use method thereof
CN111540159B (en) * 2020-05-27 2023-07-25 深圳市高新投三江电子股份有限公司 Smoke alarm capable of directionally eliminating condensation interference and use method
CN111540158B (en) * 2020-05-27 2023-08-15 深圳市高新投三江电子股份有限公司 Smoke alarm with condensation identification function and use method
CN111564019B (en) * 2020-05-27 2023-09-12 深圳市高新投三江电子股份有限公司 Smoke-sensitive fire detector capable of resisting exposure interference and use method

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