KR101678885B1 - Fire detector - Google Patents

Fire detector Download PDF

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Publication number
KR101678885B1
KR101678885B1 KR1020150070282A KR20150070282A KR101678885B1 KR 101678885 B1 KR101678885 B1 KR 101678885B1 KR 1020150070282 A KR1020150070282 A KR 1020150070282A KR 20150070282 A KR20150070282 A KR 20150070282A KR 101678885 B1 KR101678885 B1 KR 101678885B1
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KR
South Korea
Prior art keywords
fire
infrared
temperature sensing
temperature
sensors
Prior art date
Application number
KR1020150070282A
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Korean (ko)
Inventor
오현균
Original Assignee
삼삼기업주식회사
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Priority to KR1020150070282A priority Critical patent/KR101678885B1/en
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Publication of KR101678885B1 publication Critical patent/KR101678885B1/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
    • G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/0014—Radiation pyrometry, e.g. infrared or optical thermometry for sensing the radiation from gases, flames
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/52—Radiation pyrometry, e.g. infrared or optical thermometry using comparison with reference sources, e.g. disappearing-filament pyrometer
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
    • G08B21/18—Status alarms
    • G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/02—Constructional details
    • G01J5/06—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity
    • G01J2005/065—Arrangements for eliminating effects of disturbing radiation; Arrangements for compensating changes in sensitivity by shielding

Abstract

The present invention relates to a fire detection sensor for fire detection, comprising: a body part (10) fixed to a ceiling of a monitored space; First, second and third infrared rays sensors 23, 24 and 25 installed in the body 10 for detecting infrared rays radiated in the corresponding direction and generating temperature sensing signals related to the infrared rays; A comparator 30 for comparing the temperature sensing signals generated by the first, second and third infrared sensors 23, 24 and 25; If the temperature corresponding to one temperature sensing signal among the temperature sensing signals compared in the comparator 30 is greater than or equal to the temperature corresponding to the remaining two temperature sensing signals or the temperature corresponding to the three temperature sensing signals And a fire signal generating unit (40) for generating a fire signal when the absolute value of the fire signal exceeds an absolute set value.

Description

Fire detector < RTI ID = 0.0 >

FIELD OF THE INVENTION The present invention relates to a fire detector, and more particularly, to an early fire detection type fire detector capable of detecting an early occurrence of a fire.

Generally, a fire detector is installed in a building to detect a fire situation. Such a fire detector includes a differential smoke detector for detecting a changed heat, a warm smoke detector for operating at a predetermined temperature, smoke detecting smoke Type fire detectors. A dual differential smoke detector or a warm temperature detector detects heat.

The differential fire extinguisher is operated when the ambient temperature rises above a certain rate per unit time, typically when the temperature difference per minute exceeds 15 ° C. The temperature-controlled fire detector operates using a bimetallic bending property at a given temperature, typically 70 ° C.

The above-mentioned differential smoke detector or the warm fire detector must be installed when the building is newly constructed and expanded. A prior art related to this is disclosed in Japanese Patent Laid-open Publication No. 10-2009-0082800, entitled Fire Detection System.

However, heat-activated fire detectors are activated only after the fire has actually progressed since the fire situation in the monitoring space has been considerably advanced and the temperature of the ambient air has risen considerably above normal. As a result, many cases of property damage occurred when the fire detector operated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an early fire detection type fire sensor capable of instantly detecting an initial state of a fire and generating a fire signal.

It is another object of the present invention to provide an early-fire detection type fire detector capable of performing fire monitoring in a wide range.

According to an aspect of the present invention, there is provided an initial fire detection type fire detector comprising: a body part to be fixed to a ceiling of a monitored space; First, second and third infrared sensors 23, 24 and 25 installed in the body 10 for sensing infrared rays radiated from a corresponding direction and generating temperature sensing signals related to the infrared rays; A comparing unit 30 for comparing the temperature sensing signals generated by the first, second and third infrared sensors 23, 24 and 25; And a comparator (30) for comparing a temperature corresponding to one of the temperature sensing signals with a temperature corresponding to the remaining two temperature sensing signals, And a generation section (40);
The body 10 includes a base 11 formed with a plurality of fitting grooves 11c in a circumferential direction with respect to the center and fitting protrusions 13c and 14c detachably fitted in the fitting groove 11c, Second and third sensor brackets 13, 14 and 15 on which the first, second and third infrared ray sensors 23, 24, and 25 are installed, respectively;
The first, second, and third sensor brackets 13, 14, 15 are formed on both edges of the first, second, and third sensor brackets 13, 14, 15 so as to limit infrared radiation only in a specific range of the latitudinal direction. 13a, 14a and 15a and a pair of first, second and third sidewalls 13a, 14a and 15a, respectively. The first, second and third infrared sensors 23 and 24 1, 2, 3, 4, 5) for limiting infrared radiation only in a specific range of the hardness direction.

The alarm unit 50 further includes an alarm unit 50 installed on the body 10 to generate an alarm sound when the fire signal is generated.

In the present invention, the first, second and third infrared rays sensors 23, 24 and 25 are installed symmetrically with respect to the center of the base 11 of the body 10.

delete

In the present invention, the fitting projections 13c, 14c, and 15c are a pair of hooks spaced apart from each other.

According to the present invention, there are provided a first, second and third infrared ray sensors for detecting infrared rays radiated from different directions; A comparing unit comparing the temperature sensing signals generated by the first, second, and third infrared sensors; If the temperature corresponding to one temperature sensing signal among the temperature sensing signals compared in the comparator unit is greater than or equal to the temperature corresponding to the remaining two temperature sensing signals or the temperatures corresponding to the three temperature sensing signals are set to an absolute value And a fire signal generating unit for generating a fire signal when the temperature of the fire reaches a predetermined value or more.

In addition, since the fire monitoring is performed by the first, second, and third infrared ray sensors, it is possible to perform fire monitoring in a wider range than when one infrared ray sensor is employed.

FIG. 1 is an exploded perspective view of an early fire detection type fire detector according to the present invention,
FIG. 2 is a block diagram illustrating the configuration of the fire detection type fire detector of FIG. 1; FIG.
FIG. 3 is a view for explaining the configuration of the first, second and third sensor brackets provided on the base of FIG. 1,
FIG. 4 is a view for explaining the separation of the sensor bracket from the base of FIG. 3;
5 is a view for explaining that a plurality of fitting grooves are formed in the base of FIG. 4 to engage the first, second, and third fitting protrusions of the first, second, and third sensor brackets,
6 is a cross-sectional view taken along line VI-VI 'of FIG. 5; FIG. 3 is a view for explaining that the fitting projections of the first, second and third sensor brackets are engaged with the fitting grooves of the base;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an initial fire detection type fire detector according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram illustrating the configuration of a fire detection type fire detector of FIG. 1, and FIG. 3 is a block diagram of a fire detection type fire detector according to an embodiment of the present invention, Fig. 2 is a view for explaining a configuration of a sensor bracket which is a first embodiment of the present invention.

As shown in the figure, the fire detection type fire detector according to the present invention includes a body 10 fixed to a ceiling of a monitored space; First, second and third infrared rays sensors 23, 24 and 25 installed in the body 10 for detecting infrared rays radiated in the corresponding direction and generating temperature sensing signals related to the infrared rays; A comparator 30 for comparing the temperature sensing signals generated by the first, second and third infrared sensors 23, 24 and 25; If the temperature corresponding to one temperature sensing signal among the temperature sensing signals compared in the comparator 30 is greater than or equal to the temperature corresponding to the remaining two temperature sensing signals or the temperature corresponding to the three temperature sensing signals And a fire signal generator 40 for generating a fire signal when the absolute value of the fire signal exceeds the absolute set value.

The body 10 includes a base 11 provided on a ceiling of a space to be monitored and having a first coupling end 11a formed on an edge thereof and a base 11 coupled to the base 11, And a cover 12 formed with a second coupling end 12a to be coupled therewith. The first coupling end 11a is formed by forming a thread on the edge side of the base 11 and the second coupling end 12a is screwed to the first coupling end 11a on the inner peripheral surface of the edge of the cover 12a A plurality of threads are formed.

The cover 12 is made of a material through which infrared rays are transmitted so that the infrared rays can be radiated from the outside to the first, second, and third infrared ray sensors 23, 24, and 25.

The first, second and third infrared ray sensors 23, 24 and 25 are supported on the base 11 of the body 10 as infrared rays generated when a fire occurs.

All the materials generate infrared rays according to the temperature. In case of fire, the fire point generates a large temperature difference with the surrounding environment. Therefore, a different infrared wavelength is generated at the fire point. Occurs immediately. The first, second, and third infrared ray sensors 23, 24, and 25 immediately detect infrared rays irradiated in a corresponding direction, which is a fire occurrence point, and generate temperature detection signals related to the infrared rays.

The first, second and third infrared sensors 23, 24 and 25 are symmetrically disposed with respect to the center of the base 11 of the body 10. In this case, the first, second, and third infrared ray sensors 23, 24, and 25 can detect infrared rays irradiated at an azimuth of 360 degrees.

The comparator 30 compares the temperature sensing signals generated by the first, second and third infrared sensors 23, 24, and 25.

The fire signal generating unit 40 generates a fire signal when the temperature corresponding to one temperature sensing signal among the temperature sensing signals compared by the comparing unit 30 is equal to or greater than the temperature corresponding to the remaining two temperature sensing signals, A fire signal is generated when the temperatures corresponding to the three temperature sensing signals become equal to or higher than the absolute set value.

For example, when a fire occurs in a direction corresponding to the first infrared sensor 23, the temperature of the fire point is higher than the ambient temperature, so infrared rays having wavelengths different from those of the surrounding are generated. The infrared rays generated at the point of fire occurrence are irradiated to the first infrared ray sensor 23 and the infrared rays at the point where no fire is generated are irradiated to the second and third infrared ray sensors 24 and 25, Compares the temperature sensed signal sensed by the first infrared sensor 23 with the sensed temperature sensed by the second and third infrared sensors 24 and 25. The temperature signal corresponding to the temperature corresponding to the temperature sensing signal generated by the first infrared sensor 23 and the temperature sensing signal generated by the second and third infrared sensors 24 and 25, A fire signal is generated when a difference of more than a comparison set value, for example, 50 ° C or more, occurs.

On the other hand, when a fire is generated on the lower side of the fire detector of the present invention, the infrared rays generated at the fire occurrence point can be irradiated to all of the first, second and third infrared rays sensors 23, 24 and 25. In this case, the first, second and third infrared ray sensors 23, 24 and 25 generate three temperature detection signals. When the temperatures corresponding to these three temperature detection signals are at an absolute set value, for example, If it exceeds the absolute set value, a fire signal is generated.

That is, when a difference occurs in a temperature sensing signal generated by one infrared sensor and two infrared sensors among the first, second and third infrared sensors 23, 24 and 25, a comparison set value is applied, And 23, the absolute set values are applied when the temperature sensing signals generated by the infrared sensors 23, 24 and 25 are the same. Accordingly, when the temperature detection signal generated by the first, second, and third infrared sensors 23, 24, 25 is greater than or equal to one of the temperature detection signal comparison settings, 23) In cases (24) and (25), if the temperature detection signal is above the absolute set value, it can be determined that a fire has occurred.

Since the infrared rays are generated instantly at the point of fire occurrence, it is possible to immediately recognize the initial state of the fire by detecting such infrared rays.

The fire signal is transmitted to a receiver (not shown) to be used for fire monitoring or as a signal to activate the sprinkler (not shown) of the ceiling.

Meanwhile, the body part 10 may be provided with an alarm part 50 for generating a warning sound when a fire signal is generated in the fire signal generating part 40. In this case, by generating an audible alarm when a fire occurs, the resident or surrounding people can respond to the fire situation immediately.

Conventionally, a conventional differential type detector or a warm temperature type detector generates a fire signal when the ambient air is heated to a predetermined temperature or higher when a fire occurs. Accordingly, it takes a long time until the heated air is heated up to the set temperature and then the heat of the heated air is transmitted to the detector. In reality, the fire situation is very serious and the fire signal is generated.

On the contrary, the present invention generates a fire signal from a difference or an absolute value of temperature sensing signals generated as the infrared rays generated by the first, second and third infrared rays sensors 23, 24, and 25 are sensed, It is able to detect the fire situation faster than the fire detector or the warm temperature fire detector.

An amplification circuit for amplifying a temperature sensing signal generated by the first, second and third infrared sensors 23, 24, and 25, and a microcomputer for performing a comparison operation are also included in the present invention .

FIG. 3 is a view for explaining the configuration of the first, second and third sensor brackets installed on the base of FIG. 1;

The first, second, and third sensor brackets 13, 14, and 15 are provided in the base 11 with first, second, and third infrared sensors 23, 24, and 25, respectively, And an alarm bracket 16 is provided inside the first, second, and third sensor brackets 13, 14, 15 to which the alarm unit 50 is attached.

The first infrared sensor 23 is supported on the first sensor bracket 13 and the second infrared sensor 24 is supported on the second sensor bracket 14. The third infrared sensor 24 is supported on the third sensor bracket 15, The sensor 25 is supported.

The first, second and third side walls 13a, 14a (14a, 14a) and 15a (14a, 14b) The first, second and third side walls 13a, 14a and 15a are formed so as to be able to irradiate only the infrared rays in a specific range in the vertical direction between the pair of first, second and third side walls 13a, Three inclined end portions 13b, 14b and 15b are formed.

The pair of first side walls 13a limits the specific detection range that the first infrared sensor 23 can detect in the latitudinal direction. That is, the pair of first sidewalls 13a is for irradiating the first infrared ray sensor 23 with only infrared rays radiated in a specific azimuth angle range in the latitudinal direction, thereby limiting the infrared ray detection range in the latitudinal direction. On the contrary, the infrared rays radiated from the outside of the first side wall 13a are blocked by the first side wall 13a, and can not be detected by the first infrared sensor 23. By varying the length of the first side wall 13a, the range of the infrared rays irradiated by the first infrared sensor 23 can be varied widely or narrowly.

The first inclined end 13b limits the specific sensing range that the first infrared sensor 23 can detect in the longitudinal direction. That is, the first inclined end portion 13b supports the first infrared sensor 23 obliquely between the pair of first side walls 13a, and accordingly, the hardness of the first infrared sensor 23 in the longitudinal direction To limit the detection range of the image.

The first side wall 13a and the first inclined base end 13b can irradiate infrared rays irradiated in a specific range of the longitudinal direction as well as the longitudinal direction.

The pair of second and third side walls 14a and 15a and the first and second inclined end portions 14b and 15b formed on each of the first and second sensor brackets 14 and 15 are connected to the first sensor bracket 13 And has the same structure and operating relationship as the first side wall 13a and the first inclined end 13b described in Fig. That is, the second and third sidewalls 14a and 15a limit the sensing range sensed by the second and third infrared sensors 24 and 25 in the latitudinal direction, (15b) limits the sensing range that each of the second and third infrared sensors (24) and (25) can detect in the longitudinal direction.

As described above, the first, second and third sensor brackets 13, 14 and 15 limit the detection range in the latitude and longitude directions of the first, second and third infrared sensors 23, 24 and 25 First, second and third side walls 13a, 14a and 15a and first, second and third inclined end portions 13b, 14b and 15b.

FIG. 4 is a view for explaining how the sensor bracket is detached from the base of FIG. 3. FIG. 5 is a cross-sectional view of the sensor bracket of FIG. In which the fitting groove is formed.

As shown in the figure, the base 11 is formed with a plurality of insertion holes 11c in the circumferential direction with respect to the center thereof; The first, second and third sensor brackets 13, 14 and 15 may be provided with fitting protrusions 13c, 14c and 15c to be fitted to the fitting holes 11c. In this case, the positions of the first, second and third sensor brackets 13, 14 and 15 can be varied.

For example, when the fire detector of the present invention is installed at a rear wall, the first, second, and third sensor brackets 13, 14, and 15 are disposed at a predetermined azimuth angle Can be deployed. In this case, it is possible to detect the fire on the front side rather than on the wall.

6 is a cross-sectional view taken along line VI-VI 'of FIG. 5; And the fitting protrusions of the first, second and third sensor brackets are coupled to the fitting grooves of the base.

The fitting protrusions 13c, 14c and 15c formed at the lower ends of the first, second and third sensor brackets 13, 14 and 15 can be variously embodied. In this embodiment, Hook. The fitting protrusions 13c, 14c and 15c of the first, second and third sensor brackets 13, 14 and 15 are inserted into the fitting hole 11c formed in the base 11, The first, second, and third fitting protrusions 13c, 14c, and 15c can be separated from the fitting hole 11c by reducing the interval between the hooks.

As described above, according to the present invention, the first, second and third infrared ray sensors 23, 24, 25 for sensing infrared rays radiated from different directions, the first, second and third infrared ray sensors 23, 24 The comparator 30 compares the temperature sensed signal generated in the comparator 30 with the temperature corresponding to the remaining two sensed temperature signals, And a fire signal generator 40 for generating a fire signal when a temperature difference corresponding to the three temperature detection signals is equal to or greater than an absolute set value, So that appropriate responses can be made.

Since the fire monitoring is performed by the first, second, and third infrared ray sensors 23, 24, and 25, fire monitoring can be performed in a wider range than when one infrared ray sensor is employed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

10 ... body part 11 ... base
11a ... first coupling end 11c ... insertion hole
12 ... cover 12a ... second coupling end
13, 14, 15 ... First, second and third sensor brackets
13a, 14a, 15a ... first, second and third side walls
13b, 14b, 15b ... First, second,
13c, 14c, 15c ... First, second and third fitting projections
16 ... Alarm bracket 23, 24, 25 ... 1st, 2nd and 3 infrared sensors
30 ... comparison unit 40 ... fire signal generator
50 ... alarm unit

Claims (6)

An enclosing body portion (10) fixed to the ceiling of the monitored space;
First, second and third infrared sensors 23, 24 and 25 installed in the body 10 for sensing infrared rays radiated from a corresponding direction and generating temperature sensing signals related to the infrared rays;
A comparing unit 30 for comparing the temperature sensing signals generated by the first, second and third infrared sensors 23, 24 and 25; And
When a temperature corresponding to one temperature sensing signal among the temperature sensing signals compared by the comparator 30 is equal to or greater than a temperature corresponding to the remaining two temperature sensing signals, a fire signal for generating a fire signal is generated (40);
The body 10 includes a base 11 formed with a plurality of fitting grooves 11c in a circumferential direction with respect to the center and fitting protrusions 13c and 14c detachably fitted in the fitting groove 11c, Second and third sensor brackets 13, 14 and 15 on which the first, second and third infrared ray sensors 23, 24, and 25 are installed, respectively;
The first, second, and third sensor brackets 13, 14, 15 are formed on both edges of the first, second, and third sensor brackets 13, 14, 15 so as to limit infrared radiation only in a specific range of the latitudinal direction. 13a, 14a and 15a and a pair of first, second and third sidewalls 13a, 14a and 15a, respectively. The first, second and third infrared sensors 23 and 24 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12) for limiting infrared radiation only in a specific range of hardness directions. Detectable fire detector. The method according to claim 1,
Further comprising an alarm unit (50) installed in the body (10) and generating an alarm sound when the fire signal is generated. The method according to claim 1,
Wherein the first, second and third infrared rays sensors 23, 24 and 25 are installed symmetrically with respect to the center of the base 11 of the body 10. delete delete The method according to claim 1,
Wherein the fitting protrusions (13c), (14c), and (15c) are a pair of spaced apart hooks.
KR1020150070282A 2015-05-20 2015-05-20 Fire detector KR101678885B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190129464A (en) * 2018-05-11 2019-11-20 삼삼기업주식회사 A fire monitoring system for building
KR102186296B1 (en) 2020-03-16 2020-12-03 박인자 Fire detection system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100567443B1 (en) * 2005-04-08 2006-04-04 주식회사 창성에이스산업 Flame detector to detect angle of three hundred sixty in all-way detection
KR20140049147A (en) * 2012-10-16 2014-04-25 (주)아이씨랜드 Fire detection sensor device easy to replacement of sensor module
JP2014115914A (en) * 2012-12-11 2014-06-26 Nohmi Bosai Ltd Heat sensor and fire alarm facility with heat sensor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100567443B1 (en) * 2005-04-08 2006-04-04 주식회사 창성에이스산업 Flame detector to detect angle of three hundred sixty in all-way detection
KR20140049147A (en) * 2012-10-16 2014-04-25 (주)아이씨랜드 Fire detection sensor device easy to replacement of sensor module
JP2014115914A (en) * 2012-12-11 2014-06-26 Nohmi Bosai Ltd Heat sensor and fire alarm facility with heat sensor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190129464A (en) * 2018-05-11 2019-11-20 삼삼기업주식회사 A fire monitoring system for building
KR102052825B1 (en) 2018-05-11 2019-12-05 삼삼기업주식회사 A fire monitoring system for building
KR102186296B1 (en) 2020-03-16 2020-12-03 박인자 Fire detection system

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