WO2001065516A1 - Equipment concerning detection of smoke - Google Patents

Equipment concerning detection of smoke Download PDF

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Publication number
WO2001065516A1
WO2001065516A1 PCT/NO2001/000085 NO0100085W WO0165516A1 WO 2001065516 A1 WO2001065516 A1 WO 2001065516A1 NO 0100085 W NO0100085 W NO 0100085W WO 0165516 A1 WO0165516 A1 WO 0165516A1
Authority
WO
WIPO (PCT)
Prior art keywords
detector
light
smoke
chamber
detection
Prior art date
Application number
PCT/NO2001/000085
Other languages
French (fr)
Inventor
John Arntsen
Original Assignee
John Arntsen
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 John Arntsen filed Critical John Arntsen
Priority to AU39592/01A priority Critical patent/AU3959201A/en
Publication of WO2001065516A1 publication Critical patent/WO2001065516A1/en

Links

Classifications

    • 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
    • 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
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Definitions

  • the invention is an arrangement for detection of smoke in rooms.
  • the arrangement is situated in a central position for several rooms and where the detection is done optical.
  • Detection of fire is done by optical sensing if there is smoke present. The detection is done by that air is sucked continually from a room you wish to watch over for fire and to a optical detector. If the air contains smoke particles then they will suppress the light which is send from a light source and against a light sensitive detector. When the light is stopped or weakened because of that the smoke particles are between the light source and the detector, the detector will give a signal about the condition and an alarm is started.
  • the intention of the invention is to get a very good optical detector for smoke where the detection is more secure and give minimum of false alarms.
  • detector chamber for suction of air from each room and where there is a 1. detector pair for smoke when air from the detector chambers are sucks into a common for all visual observer chamber and further to a common chamber equipped with a 2. detector pair for detection of smoke.
  • Figure 1 shows front view of a separate detector unit (for 7. room/cargo room)
  • Figure 2 shown a cross section of a separate detector chamber for smoke.
  • Figure 3 shows an arrangement of light diodes for common chamber.
  • Figure 4a is a front view of the detector unit and 4b a cross section of common chamber taken along a plan in right angle to figure 4a.
  • the separate detector unit in figure 1 consist here of seven separate detector chambers 2 one for each room which we wish to monitor. Detection of smoke from a room for instance a cargo room in a skip or a room in a farming house, is done by that there is a pipe from each room to a separate detector chamber 2 belonging to that room. The pipe goes to the detector chamber 2 through an inlet 3. From each detector chamber 2 goes a outlet 4 for the air to a visual observer chamber 5 which in it front have a window 6. The visual observer chamber 5 is further connected with a common chamber 7. A fan (not shown) sucks air from the single room/cargo room through the separate detector chamber 2 to the visual observer chamber 5 and further by the common chamber 7 and out of the detector unit 1.
  • a detector chamber 2 has an oblong shape for instance with a rectangular cross sections in all three plans, but not necessarily because other shapes can be used in some of the cross sections.
  • a light source 9 sending light along the main direction of the detector chamber 2 and against the other short side 8 in the opposite end of the detector chamber 2.
  • a light sensitive detector 10 which receives light from the light source 9 if there is no prevention in the detector chamber 2.
  • the inlet 3 is placed near to the detector 10 and air is flowing parallel with the light beam and the outlet 4 is near to the light source 9.
  • an air flow indicator 14 It is a mechanical flap which consists of a long arm 13 formed as a sheet and is moveable into the corresponding detector chamber 2 and in one outermost position it prevent the light to hit the detector 10.
  • the other arm of the flap, the indicating arm 12 is shorter than the long arm 13, but is equipped with a higher weight.
  • the air flow indicator 14 is revolving arranged around an axle going across the front of all separate detector chambers 2 and so balanced that if the air flows through a single detector chamber 2 become to low then the long arm 13 will tilt into the corresponding detector chamber 2 and stop the light from the light source 9 to reach the detector 10.
  • the indicating arm 12 is tilting into the observer chamber 5 and visual show that the air flow is to low. At the same time is the detector 10 giving alarm because the light is gone.
  • the light source 9 is a light diode having high light brilliance, a light diode which have at least a radiation with light brilliance of 2-2,5 candela.
  • the single detector chamber 2 have a geometric shape where the condition between the length between the light source 9 and the detector 10 and the cross section in right angle to the main length direction is about 8:1.
  • Figure 3. This light source is special made for being the light source in the common chamber 7.
  • This light source in centre consists of a sensitive light detector 9.1.
  • This detector 9.1 shall monitoring if the light diodes 9.2 is lightning.
  • the light diodes 9.2 is in a regular manner arranged (7 pieces) at a circular arc around the centre. These are powered together in groups of 2+2+3. This means that if at the worst that two groups of the light diodes 9.2 switch off then the last group of 2 or 3 light diodes 9.2 will be sufficient to give necessary light brilliance to execute the detection function in the common chamber 7.
  • FIG. 2 Arranged in the top plate 11 near to the inlet 3 is a test split 15 for bringing in smoke from a cigarette for testing the function of the detector.
  • the fan When the detector unit 1 is working will the fan produce an uniform air flow 18 from each room/cargo room to the single separate detector chamber 2 and to the visual observer chamber 5 and further to the common chamber 7. If there is smoke together with the air flow from one of the room then it will be brought to its separate detector chamber 2 where the light will be weakened and the detector 10 start an alarm.
  • an air flow 18 containing smoke comes into the common chamber 7 is the smoke brought into the light of the light diodes 9.2, light beam 19 will be reflected by the smoke, reflects the light to detectors 16 which start an alarm and a control unit indicates a true fire alarm.
  • the smoke alarm is started. Only if the light in the detector chamber 2 is weakened and no smoke is detected in the common chamber 7 is a false alarm started.
  • the common chamber 7 is a pipe 17 where the light diodes 9.2 are placed and the pipe 17 collects the light so that the spreading of the light in the common chamber 7 become as little as possible.
  • the light detectors 16 in the common chamber 7 shall normally have it so as dark as possible.
  • the air flow indicator will be released and shows this visual at the same time as the alarm releases from one or more separate detector chambers 2, but not from the common chamber 7 because in there is no smoke. This is understood by the control unit as not to be an true fire alarm, but a false caused by other reasons.

Abstract

A detector unit (1) with several detector chambers (2), an observation chamber (5) and a common chamber (7). A pair of light sources (9) and a detector (10) are in the detector chambers (2). A pair of light sources (9.2) and a sensor (9.1) are in the common chamber (7). An air flow detector (14) is in each separate detector chamber (2) having a long arm (12). A showing arm (12) is in the visual observation chamber (5).

Description

EQUIPMENT CONCERNING DETECTION OF SMOKE
The invention is an arrangement for detection of smoke in rooms. The arrangement is situated in a central position for several rooms and where the detection is done optical.
Detection of fire is done by optical sensing if there is smoke present. The detection is done by that air is sucked continually from a room you wish to watch over for fire and to a optical detector. If the air contains smoke particles then they will suppress the light which is send from a light source and against a light sensitive detector. When the light is stopped or weakened because of that the smoke particles are between the light source and the detector, the detector will give a signal about the condition and an alarm is started.
The intention of the invention is to get a very good optical detector for smoke where the detection is more secure and give minimum of false alarms.
This is attained by a detector chamber for suction of air from each room and where there is a 1. detector pair for smoke when air from the detector chambers are sucks into a common for all visual observer chamber and further to a common chamber equipped with a 2. detector pair for detection of smoke.
More details of the invention will appear through the following presentation of a sample of the construction during referring to drawings.
Figure 1 shows front view of a separate detector unit (for 7. room/cargo room) Figure 2 shown a cross section of a separate detector chamber for smoke. Figure 3 shows an arrangement of light diodes for common chamber. Figure 4a is a front view of the detector unit and 4b a cross section of common chamber taken along a plan in right angle to figure 4a.
The separate detector unit in figure 1 consist here of seven separate detector chambers 2 one for each room which we wish to monitor. Detection of smoke from a room for instance a cargo room in a skip or a room in a farming house, is done by that there is a pipe from each room to a separate detector chamber 2 belonging to that room. The pipe goes to the detector chamber 2 through an inlet 3. From each detector chamber 2 goes a outlet 4 for the air to a visual observer chamber 5 which in it front have a window 6. The visual observer chamber 5 is further connected with a common chamber 7. A fan (not shown) sucks air from the single room/cargo room through the separate detector chamber 2 to the visual observer chamber 5 and further by the common chamber 7 and out of the detector unit 1. A detector chamber 2 has an oblong shape for instance with a rectangular cross sections in all three plans, but not necessarily because other shapes can be used in some of the cross sections. In one of the short sides 8 is arranged a light source 9 sending light along the main direction of the detector chamber 2 and against the other short side 8 in the opposite end of the detector chamber 2. In the last mentioned short side 8 is a light sensitive detector 10 which receives light from the light source 9 if there is no prevention in the detector chamber 2. The inlet 3 is placed near to the detector 10 and air is flowing parallel with the light beam and the outlet 4 is near to the light source 9.
Straight through a top plate 11 in the detector chamber 2 where the outlet 4 is, there is placed an air flow indicator 14. It is a mechanical flap which consists of a long arm 13 formed as a sheet and is moveable into the corresponding detector chamber 2 and in one outermost position it prevent the light to hit the detector 10. The other arm of the flap, the indicating arm 12 is shorter than the long arm 13, but is equipped with a higher weight. The air flow indicator 14 is revolving arranged around an axle going across the front of all separate detector chambers 2 and so balanced that if the air flows through a single detector chamber 2 become to low then the long arm 13 will tilt into the corresponding detector chamber 2 and stop the light from the light source 9 to reach the detector 10. The indicating arm 12 is tilting into the observer chamber 5 and visual show that the air flow is to low. At the same time is the detector 10 giving alarm because the light is gone.
The light source 9 is a light diode having high light brilliance, a light diode which have at least a radiation with light brilliance of 2-2,5 candela. The single detector chamber 2 have a geometric shape where the condition between the length between the light source 9 and the detector 10 and the cross section in right angle to the main length direction is about 8:1. Figure 3. This light source is special made for being the light source in the common chamber 7.This light source in centre consists of a sensitive light detector 9.1. This detector 9.1 shall monitoring if the light diodes 9.2 is lightning. The light diodes 9.2 is in a regular manner arranged (7 pieces) at a circular arc around the centre. These are powered together in groups of 2+2+3. This means that if at the worst that two groups of the light diodes 9.2 switch off then the last group of 2 or 3 light diodes 9.2 will be sufficient to give necessary light brilliance to execute the detection function in the common chamber 7.
Figure 2. Arranged in the top plate 11 near to the inlet 3 is a test split 15 for bringing in smoke from a cigarette for testing the function of the detector. When the detector unit 1 is working will the fan produce an uniform air flow 18 from each room/cargo room to the single separate detector chamber 2 and to the visual observer chamber 5 and further to the common chamber 7. If there is smoke together with the air flow from one of the room then it will be brought to its separate detector chamber 2 where the light will be weakened and the detector 10 start an alarm. When an air flow 18 containing smoke comes into the common chamber 7 is the smoke brought into the light of the light diodes 9.2, light beam 19 will be reflected by the smoke, reflects the light to detectors 16 which start an alarm and a control unit indicates a true fire alarm. In other words when the smoke weakens the light in the detector chamber 2 and reflects the light in the common chamber 7 the smoke alarm is started. Only if the light in the detector chamber 2 is weakened and no smoke is detected in the common chamber 7 is a false alarm started. In the common chamber 7 is a pipe 17 where the light diodes 9.2 are placed and the pipe 17 collects the light so that the spreading of the light in the common chamber 7 become as little as possible. The light detectors 16 in the common chamber 7 shall normally have it so as dark as possible.
If the air flow by the detector unit (figure l)become to low or stops then the air flow indicator will be released and shows this visual at the same time as the alarm releases from one or more separate detector chambers 2, but not from the common chamber 7 because in there is no smoke. This is understood by the control unit as not to be an true fire alarm, but a false caused by other reasons.

Claims

1. Arrangement for detection of smoke from a room, characterize by a detector chamber (2) for suction of ear from each room and where there is a 1. detector pair (9,10) for smoke when ear from the detector chambers (2) are suctioned into a common for all visual observer chamber (5) and further to a common chamber (7) equipped with a 2. detector pair (9.1 , 9.2, 16) for detection of smoke.
2. Arrangement for detection of smoke from a room according to claim 1. characterize by that the 1. detector pair (9,10) consist of a light source (9) which is a light diode having at least a light brilliance at 1 candela or higher and a detector (10).
3. Arrangement for detection of smoke from a room according to claim 1. characterize by that the 2. detector pair (9.1 , 9.2, 16) consists of several light diodes (9.2) with at least a light brilliance at 1 candela or higher and light detectors (16).
4. Arrangement for detection of smoke from a room according to claim 3, characterize by that the light diodes (9.2) having at least a light brilliance of 1 candela or more are seventh ones arranged in a regular manner at a circular arc around a light sensitive detector (9.1).
5. Arrangement for detection of smoke from a room according to claim 1 , characterize by that the separate detector chambers (2) are arranged with an ear flow indicator (14).
6. Arrangement for detection of smoke from a room according to claim 1 , characterize by that the separate detector chambers (2) have a oblong shape with longest length 8 times the shortest length.
7. Arrangement for detection of smoke from a room according to one of the claims 2, 3 or 4, characterize by that the light diode (9, 9.2) must at least have a light brilliance at 1 candela or higher.
PCT/NO2001/000085 2000-03-02 2001-03-02 Equipment concerning detection of smoke WO2001065516A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU39592/01A AU3959201A (en) 2000-03-02 2001-03-02 Equipment concerning detection of smoke

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20001092 2000-03-02
NO20001092A NO20001092L (en) 2000-03-02 2000-03-02 Device for detection of smoke

Publications (1)

Publication Number Publication Date
WO2001065516A1 true WO2001065516A1 (en) 2001-09-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2001/000085 WO2001065516A1 (en) 2000-03-02 2001-03-02 Equipment concerning detection of smoke

Country Status (3)

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AU (1) AU3959201A (en)
NO (1) NO20001092L (en)
WO (1) WO2001065516A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008109933A1 (en) * 2007-03-09 2008-09-18 Xtralis Technologies Ltd Particle detection apparatus
EP2224406A1 (en) * 2009-01-30 2010-09-01 Honeywell International Inc. Dual channel aspirated detector

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654082A (en) * 1949-09-08 1953-09-29 C O Two Fire Equipment Co Smoke detector
US3678487A (en) * 1971-02-08 1972-07-18 Environment One Corp Multi-zone incipient or actual fire and/or dangerous gas detection system
GB2243475A (en) * 1990-04-26 1991-10-30 David Theodore Nels Williamson Gas and smoke alarm systems
US5103212A (en) * 1989-07-03 1992-04-07 Worcester Polytechnic Institute Balanced fluid flow delivery system
GB2277625A (en) * 1993-04-30 1994-11-02 Kidde Fire Protection Ltd Smoke detecting system
US5755250A (en) * 1992-05-11 1998-05-26 I.E.I. Pty. Ltd. Manifold and valve assembly for a smoke/pollution detection system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2654082A (en) * 1949-09-08 1953-09-29 C O Two Fire Equipment Co Smoke detector
US3678487A (en) * 1971-02-08 1972-07-18 Environment One Corp Multi-zone incipient or actual fire and/or dangerous gas detection system
US5103212A (en) * 1989-07-03 1992-04-07 Worcester Polytechnic Institute Balanced fluid flow delivery system
GB2243475A (en) * 1990-04-26 1991-10-30 David Theodore Nels Williamson Gas and smoke alarm systems
US5755250A (en) * 1992-05-11 1998-05-26 I.E.I. Pty. Ltd. Manifold and valve assembly for a smoke/pollution detection system
GB2277625A (en) * 1993-04-30 1994-11-02 Kidde Fire Protection Ltd Smoke detecting system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008109933A1 (en) * 2007-03-09 2008-09-18 Xtralis Technologies Ltd Particle detection apparatus
EP2224406A1 (en) * 2009-01-30 2010-09-01 Honeywell International Inc. Dual channel aspirated detector

Also Published As

Publication number Publication date
NO20001092D0 (en) 2000-03-02
NO20001092L (en) 2001-09-03
AU3959201A (en) 2001-09-12

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