EP1638062A1 - Détecteur de fumée à aspiration et méthode de son fonctionnement - Google Patents

Détecteur de fumée à aspiration et méthode de son fonctionnement Download PDF

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Publication number
EP1638062A1
EP1638062A1 EP05019151A EP05019151A EP1638062A1 EP 1638062 A1 EP1638062 A1 EP 1638062A1 EP 05019151 A EP05019151 A EP 05019151A EP 05019151 A EP05019151 A EP 05019151A EP 1638062 A1 EP1638062 A1 EP 1638062A1
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EP
European Patent Office
Prior art keywords
air
fire detector
values
correction
mass
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP05019151A
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German (de)
English (en)
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EP1638062B1 (fr
Inventor
Robert Laufersweiler
Uwe Scheidthauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hekatron Vertriebs GmbH
Original Assignee
Hekatron Technik GmbH
Hekatron Vertriebs GmbH
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Publication of EP1638062A1 publication Critical patent/EP1638062A1/fr
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Publication of EP1638062B1 publication Critical patent/EP1638062B1/fr
Anticipated expiration legal-status Critical
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    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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 SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/04—Monitoring of the detection circuits
    • G08B29/043—Monitoring of the detection circuits of fire detection circuits
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/18—Prevention or correction of operating errors
    • G08B29/20—Calibration, including self-calibrating arrangements
    • G08B29/24—Self-calibration, e.g. compensating for environmental drift or ageing of components

Definitions

  • the invention relates to a method for detecting blockages
  • the invention further relates to a fire detection system for carrying out the method, comprising at least one fire detector for detecting at least one fire characteristic to which a representative amount of room or equipment air is supplied via said pipe system and a device for determining a flow value, based on which the state of the pipe system is judged.
  • Systems using such methods consist of at least one fan, which sucks in ambient air from a pipe system from the rooms or devices to be monitored and supplies at least one detector for fire parameters.
  • fire characteristics are in ansaugenden fire alarm systems mostly smoke and combustion gases such.
  • the piping systems used in this case can consist, for example, of an elongated pipe to which holes for sucking in the air are attached at suitable locations. Suitable locations are, for example, the outlets of appliance cooling air or in the middle of a smaller space to be monitored.
  • the suction holes can also follow each other at regular intervals, which makes sense, especially in large halls or high-bay warehouses. As a rule, the suction holes are dimensioned so that each hole sucks in as much air as possible.
  • pipe systems with multiple branches find especially U and H systems Use.
  • a monitoring area can be allocated to each hole, this area will no longer be able to be monitored for blockage of the hole. Even with an interruption of a pipe, no more air will be sucked from the interruption following holes, which can no longer monitor the areas associated with these holes.
  • the measured power serves as a measure of the mass flow.
  • the mass flow is used to detect blockages or interruptions, it may happen that the mass flow is already affected by changes in air pressure and temperature and the measured value exceeds the thresholds mentioned even though there is no obstruction or interruption. For example, as the pressure increases, the density of the air increases, so more particles pass through the sensor per time and therefore cool it more. To circumvent this problem would make the windows formed from the thresholds correspondingly large, but in turn the sensitivity to constipation and
  • DE 44 28 694 A1 uses an additional pressure sensor to perform a pressure compensation of the measured value in addition to the temperature compensation known from DE 33 31 203 A1.
  • the volume flow is determined from the measured values for the mass flow, the temperature and the pressure according to the following formula.
  • V (t) is the volume flow
  • m (t) the mass flow
  • T the temperature of the air flow
  • R L the specific gas constant of the air
  • p the air pressure and ⁇ the density of the air.
  • EP 1 056 062 B1 a value representing the air flow is determined from the rotational speed and the power consumption of the fan. What can be dispensed with an additional air flow sensor.
  • EP 1 056 062 B1 also describes that by observing the fan speed and the power consumption of the driving engine a density change of the air can be detected and that a corresponding correction factor can be determined by means of a trend detection.
  • the pressure sensor used in DE 44 28 694 A1 is dispensable.
  • the method of the correction values determined by a trend has the disadvantage that a device using this method can not cope with the density changes during a longer phase in the switched-off state and may, under certain circumstances, start from false assumptions regarding the prevailing density ,
  • Interruption can be feigned without such a change has actually taken place.
  • the object of which is to provide a method and a fire master of the type described above that are even more sensitive with regard to the detection of blockages and
  • Fig. 1 shows the characteristics of a fan and a pipe system with predominantly laminar flow at two different temperatures, in which the volume flow on the X-axis and on the Y-axis of the differential pressure, is softer generated by the fan and applied via the pipe system drops.
  • the solid dark curves, each labeled with b, correspond to a low temperature and the dashed (light) characteristic curves of higher temperature, respectively marked with a.
  • the air density is known to increase when switching from a higher to a lower temperature, which is also caused by an increase in pressure. It can clearly be seen that the fan duct shifts at high temperature (2a) at a constant speed with a temperature drop from bottom to top to the characteristic curve at low temperature (2b). At the same time, the pipe characteristic shifts to the right at high temperature (1 a) to the characteristic curve at low temperature (1b). Thus, the high temperature operating point (3a) is also shifted to the low temperature operating point (3b). It can be clearly seen that this also entails an increase in the volumetric flow and it becomes clear that an upper volumetric flow limit value can be exceeded even if the temperature decrease is superimposed with an increasing pressure and an interruption is simulated.
  • Fig. 2 in addition to the pipe system shown in Fig. 1 further characteristics (5a, 5b, 6a, 6b) are shown for other pipe systems using the same fan.
  • the volume flow is plotted on the X axis and the differential pressure is plotted on the Y axis, and the characteristic curves labeled b in each case designate a tube or fan bel low temperature and the characteristic curves a the same tube or fan at a higher temperature. It can be clearly seen that the density-related changes in the volume flow also depend on the pipe system used.
  • correction values are determined which represent the changes in the properties of the system consisting of the intake pipe and the fan, which are based on changes in the density of the air or changes in at least one environmental parameter affecting the air density, and for the correction of the mass flow. and / or volumetric flow and / or used to adjust the limits.
  • ⁇ is the density of the air
  • p the pressure
  • p d the saturation vapor pressure
  • ⁇ the relative humidity
  • T the temperature in Kelvin
  • R L the specific gas constant of the dry air
  • a correction value is therefore determined for each temperature occurring during operation of the fire detector, which represents the changes in the properties of the system consisting of the intake pipe and fan, which are based on changes in temperature of the air and when reaching the respective temperature for correction of the mass and / or volumetric flow measured value and / or for adapting the limit values.
  • a correction value is determined for each air pressure occurring during operation of the fire detector, which represents the changes in the properties of the system consisting of the intake pipe and fan, which are based on air pressure changes of the air and for correction of the respective pressure the mass and / or volumetric flow measured value and / or to adapt the limit values is applied.
  • a correction value is determined for each occurring in the operation des.Brandmelders humidity, which represents the changes der.Eigenschaften existing from the intake manifold and fan system based on changes in humidity of the air and upon reaching the respective humidity is used to correct the mass and / or volumetric flow measured value and / or to adapt the limit values.
  • a correction value is determined for each occurring during operation of the Brandmeiders temperature and each air pressure occurring during operation of the fire detector, which represents the changes in the properties of the system consisting of the intake manifold and fan on temperature or Pressure changes of the air are based and upon reaching the respective temperature and the respective pressure for the correction of the mass and / or volumetric flow measured value and / or to adapt the limit values is applied.
  • a correction value is determined for each occurring in the operation of the fire detector air density, which represents the changes in the properties of the system consisting of the intake manifold and fan, based on density changes of the air and upon reaching the respective air density Correction of the mass and / or volumetric flow measured value and / or to adapt the limit values is applied.
  • the correction values for temperature, air pressure and air humidity or the air density derived therefrom are determined by measurement for each fan pipe system and stored in a table.
  • the correction values representing the changes in the characteristics of the system consisting of the intake pipe and fan, which are based on temperature, and / or pressure, and / or humidity, and / or density changes of the air based, for temperature and / or air pressure and / or humidity or the air density derived therefrom, independently determined by the fire detector during operation and entered in a table provided for in the further course of the operation always to resort to it and to correct the current air flow values.
  • a fire prevention device therefore contains at least one fire characteristic detector, a fan with a pipe system connected thereto, which sucks air from one or more monitoring rooms or electrical appliances and supplies it to the detector and furthermore a device for detecting a mass and / or volumetric flow Comparing means comparing a current flow value with upper and lower limits and at least one or more sensors for environmental parameters from the group consisting of the temperature, the air pressure and the humidity, and further a memory in which correction values are stored containing the Changes in the characteristics of the system consisting of the intake manifold and fan, which represents changes in at least one of the environmental parameters from the group consisting of the temperature, the atmospheric pressure and the humidity and / or the density change of the Lu derived therefrom ft, and a correction device which applies the correction values to the current measured values of the mass and / or volumetric flow and / or to the limit values.
  • a preferred fire alarm device additionally contains a correction value calculation unit which determines the correction values from the current mass and / or volumetric flow measured value and a stored reference or a clogging / interrupt value,
  • Another preferred fire cutting apparatus comprises a test unit which checks whether a change in the mass and / or volumetric flow measured value is based on a pipe change (blockage / interruption) or changes one or more of the environmental parameters and / or the resulting air density change.
  • Another preferred fire alarm device includes an air density calculator.
  • the volumetric flows of different fan duct systems are measured at different temperatures and / or air pressures and or humidities, and the deviations are determined to a corresponding desired value, which is e.g. corresponds to the volume flow values under normal conditions (273.15 K and 101325 Pa).
  • a corresponding desired value which is e.g. corresponds to the volume flow values under normal conditions (273.15 K and 101325 Pa).
  • These deviations are now stored in a table in the fire detector.
  • the current values for temperature and / or pressure and / or humidity are measured with a temperature and / or pressure and / or humidity sensor and, if appropriate, the current air density is calculated therefrom.
  • the correction value is taken from the table and added or subtracted to the current, mass or volumeric current value. If, for example, the temperature reaches 30 ° C, the fire detector removes the corresponding correction value from the table and adds or subtracts it from the current volume flow value or the optionally compensated mass flow value. In the same way, corrections are made for pressure and humidity changes. Although the air flow value thus obtained no longer corresponds to the current mass flow or. Volume flow value, but changes only due to actual changes in the pipe system such as blockages and interruption and is therefore ideally suited for their monitoring. Especially if all variables which influence the air density are used for the correction, the limits for interruption and blockage can be set very close to the set value of the air flow. Which means a significant increase in sensitivity over the prior art.
  • the correction values are preferably stored in the table for a few support values. All other intermediate correction values are determined therefrom by an interpolation for each temperature and / or pressure and / or humidity and / or the air density determined therefrom.
  • a such exemplary table can be seen in Fig. 4. It shows from left to right: the temperature in ° C, a corresponding digital temperature correction value, the air pressure in hectopascals, a corresponding digital pressure correction value, the humidity in% and a corresponding digital humidity correction value.
  • the table is created by the fire detector itself during operation. This means that the fire detector can automatically adjust itself to all possible connected fan pipe systems and otherwise necessary costly measurements can be omitted.
  • the fire detector detects the current mass and / or volumetric flow value and the current environmental data such as temperature and / or air pressure and / or humidity corresponding to the system expansion with the aid of appropriate sensors or by means of fan characteristics.
  • the specialist who starts up the fire detector should be convinced of the proper condition of the system.
  • the fire detector now saves the measured mass and volume flow value, possibly compensated for temperature and pressure, as commissioning value and enters the measured environmental data in the table.
  • the correction factor 0 is now entered permanently in the table for these measured values. If one of the recorded environmental parameters such as temperature, air pressure or humidity changes, the airflow value will also change.
  • the parameter is simply determined.
  • the difference to the commissioning value is entered as a correction value.
  • ⁇ is the density of the air
  • p is the pressure
  • p d is the saturation vapor pressure
  • ⁇ is the relative humidity
  • T is the temperature in Kelvin
  • R L is the specific gas constant of the dry air.
  • the selected difference is now entered as the correction value for the respective parameter. To simplify this, the influence of moisture can be neglected.
  • correction values are not to determine individual correction values for the various environmental parameters, but to calculate the respective density of the air on the basis of the measured environmental parameters such as temperature, pressure and possibly humidity with the above-mentioned formulas and the difference from the Enter the commissioning value and the current airflow value as a correction value for the respective density.
  • a table of how to obtain them is shown by way of example in FIG. Therein, the air density in kg / m 3 is entered in the left column and the corresponding digital correction value in the right column.
  • the gray shaded fields store the values that were valid during commissioning.
  • Fig. 6 shows a fire alarm device according to the invention, which is indicated as a whole by 61. It contains at least one detector (62) for fire characteristics such as smoke or combustion gases. A fan (63) having a pipe system (64) connected thereto, which sucks air from one or more monitoring rooms or electrical equipment and supplies it to the detector.
  • the fire detection which is not the subject of the invention will not be further described here.
  • the fire detector (61) includes a sensor (65) for detecting a mass and / or flow and at least one further environmental sensor (67,68, 69), from the group consisting of a temperature, pressure, and humidity sensor is formed.
  • the outputs of this at least one environmental sensor are connected via an optional airtightness calculator (610) to a first memory (611) in which a correction value table is stored and connected to a first input of a test unit (612).
  • a second input of the test unit is the signal of the mass or volume flow sensor (65).
  • the test unit now checks whether a change in the mass or volume flow to a change in environmental parameters from the sensors (67, 68, 69) or a change in the pipe (64) baruht and outputs a corresponding signal at its control output.
  • the control output of the test unit (612) is provided with a respective control input of the memory (611), a correction value calculation unit (613) and an optional second memory (614) for a clogging / interruption value connected.
  • the correction value calculation unit (613) obtains the data necessary for calculating the correction values from the mass and / or volume flow sensor (65), a third memory (615) containing reference values and the environmental parameter scores (67, 68, 69). From the latter, the correction value calculation unit (613) receives the data either via the table pointer (B11) or its own direct connection line, not shown for the sake of clarity. The correction value calculation unit (613) constantly calculates a new correction value from the incoming data. If the test unit (612) has determined that there is no pipe change (clogging / interruption) and there are no final correction values for the current environmental parameters, the new correction value, together with the environmental parameters and / or the air density, is transferred to the table in the first memory ( 611).
  • preliminary or final correction values are available for current environmental parameters and / or air densities, they are provided, if appropriate, after an interpolation operation, which is not shown here, at a first input of a correction device (616).
  • a correction device At a second input of the correction device (616) is the current signal of the mass or volume flow sensor (65).
  • the correction device (616) adds or subtracts the measured value of the sensor (65) with the correction value from the table memory (811) and provides the corrected airflow signal at a first input of the comparison device (66).
  • the comparator (66) compares the corrected airflow value with upper and lower limits stored in a fourth memory (617). If this comparison is a.
  • the comparator (66) outputs a corresponding signal at its output (618). Furthermore, the comparison device (66) can determine the difference between the corrected airflow value from the correction device (616) with the value at startup, which is stored in a fifth memory (619), a clogging / interruption value. If the tester (612) has determined that there are pipe changes, that value is taken over into the fifth memory (614) and can be used for more recent correction value calculations.
  • Fig. 7 shows an alternative embodiment In which, in contrast to Fig. 6, the mass flow sensor (65 in Fig. 6) has been replaced by an air flow calculation unit (700) which outputs an air flow value the operating data such as power consumption and fan speed.
  • the air flow calculation unit (700) can additionally use one or more of the environmental measured values of the sensors (67, 68, 69). The necessary. Connection is not shown here.
  • FIG. 7 corresponds to FIG. 6.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire Alarms (AREA)
  • Fire-Detection Mechanisms (AREA)
EP05019151A 2004-09-09 2005-09-02 Détecteur de fumée à aspiration et méthode de son fonctionnement Expired - Lifetime EP1638062B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102004044094A DE102004044094A1 (de) 2004-09-09 2004-09-09 Ansaugender Brandmelder und Verfahren zu dessen Betrieb

Publications (2)

Publication Number Publication Date
EP1638062A1 true EP1638062A1 (fr) 2006-03-22
EP1638062B1 EP1638062B1 (fr) 2008-06-25

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EP05019151A Expired - Lifetime EP1638062B1 (fr) 2004-09-09 2005-09-02 Détecteur de fumée à aspiration et méthode de son fonctionnement

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EP (1) EP1638062B1 (fr)
AT (1) ATE399357T1 (fr)
DE (2) DE102004044094A1 (fr)
ES (1) ES2309630T3 (fr)
PT (1) PT1638062E (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009132702A1 (fr) * 2008-04-29 2009-11-05 Siemens Aktiengesellschaft Détection de fumée et/ou de certains gaz au moyen d'une conduite également installée à d'autres fins
EP2407946A1 (fr) 2010-07-15 2012-01-18 Siemens Schweiz AG Détection d'encrassements et de ruptures dans un détecteur de fumées par aspiration (ASD)
EP2469492A1 (fr) * 2010-11-29 2012-06-27 Minimax GmbH & Co. KG Procédé et dispositif destinés à la détection d'incendie dans des volumes
US9384643B2 (en) 2012-11-27 2016-07-05 Xtralis Technologies Ltd Fire detection
CN115376262A (zh) * 2021-05-18 2022-11-22 西门子瑞士有限公司 增加抽取式烟雾检测器中的抽吸功率以缩短传输时间
EP4109429A1 (fr) * 2021-06-21 2022-12-28 Carrier Corporation Fonctionnement d'un système de détecteur d'incendie à aspiration
US20240029532A1 (en) * 2022-05-18 2024-01-25 Carrier Corporation Condensation monitoring in aspirating smoke detection systems

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2958969T3 (es) 2020-05-08 2024-02-16 Carrier Corp Detección de fugas en un sistema de detección de incendios por aspiración

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254414A (en) * 1979-03-22 1981-03-03 The United States Of America As Represented By The Secretary Of The Navy Processor-aided fire detector
DE3331203A1 (de) 1983-08-30 1985-03-14 Securiton AG, Zollikofen, Bern Vorrichtung zur ueberwachung der geschwindigkeit eines gasstromes in einem kanal
EP0197371A1 (fr) * 1985-03-20 1986-10-15 Siemens Aktiengesellschaft Agencement pour détecteur d'incendie avec un système d'aspiration
EP0418409A1 (fr) * 1989-09-19 1991-03-27 Siemens Aktiengesellschaft Procédé et dispositif pour éviter les influences climatiques de l'environnement sur les indicateurs automatiques d'incendie
EP0696787A1 (fr) * 1994-08-12 1996-02-14 Wagner Alarm- und Sicherungssysteme GmbH Dispositif et méthode de détection d'incendie à compensation de la pression d'air
EP1056062B1 (fr) 1999-05-27 2003-09-24 Securiton AG Détecteur d'incendie

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4254414A (en) * 1979-03-22 1981-03-03 The United States Of America As Represented By The Secretary Of The Navy Processor-aided fire detector
DE3331203A1 (de) 1983-08-30 1985-03-14 Securiton AG, Zollikofen, Bern Vorrichtung zur ueberwachung der geschwindigkeit eines gasstromes in einem kanal
EP0197371A1 (fr) * 1985-03-20 1986-10-15 Siemens Aktiengesellschaft Agencement pour détecteur d'incendie avec un système d'aspiration
EP0418409A1 (fr) * 1989-09-19 1991-03-27 Siemens Aktiengesellschaft Procédé et dispositif pour éviter les influences climatiques de l'environnement sur les indicateurs automatiques d'incendie
EP0696787A1 (fr) * 1994-08-12 1996-02-14 Wagner Alarm- und Sicherungssysteme GmbH Dispositif et méthode de détection d'incendie à compensation de la pression d'air
DE4428694A1 (de) 1994-08-12 1996-02-22 Wagner Alarm Sicherung Luftdruckkompensierte Branderkennungsvorrichtung und Verfahren
EP1056062B1 (fr) 1999-05-27 2003-09-24 Securiton AG Détecteur d'incendie

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009132702A1 (fr) * 2008-04-29 2009-11-05 Siemens Aktiengesellschaft Détection de fumée et/ou de certains gaz au moyen d'une conduite également installée à d'autres fins
EP2407946A1 (fr) 2010-07-15 2012-01-18 Siemens Schweiz AG Détection d'encrassements et de ruptures dans un détecteur de fumées par aspiration (ASD)
WO2012007434A1 (fr) 2010-07-15 2012-01-19 Siemens Schweiz Ag Détection d'obturations et d'interruptions dans un détecteur de fumée à aspiration
CN102971772A (zh) * 2010-07-15 2013-03-13 西门子瑞士有限公司 在吸入烟雾信号器（asd）中识别阻塞和中断
AU2011278441B2 (en) * 2010-07-15 2013-09-12 Siemens Schweiz Ag Detection of blockages and interruptions with an aspirating smoke detector (ASD)
CN102971772B (zh) * 2010-07-15 2015-09-02 西门子瑞士有限公司 在吸入烟雾信号器(asd)中识别阻塞和中断
US9134716B2 (en) 2010-07-15 2015-09-15 Siemens Schweiz Ag Detection of blockages and interruptions with an aspirating smoke detector (ASD)
EP2469492A1 (fr) * 2010-11-29 2012-06-27 Minimax GmbH & Co. KG Procédé et dispositif destinés à la détection d'incendie dans des volumes
US9384643B2 (en) 2012-11-27 2016-07-05 Xtralis Technologies Ltd Fire detection
US9940806B2 (en) 2012-11-27 2018-04-10 Garrett Thermal Systems Limited Fire detection
CN115376262A (zh) * 2021-05-18 2022-11-22 西门子瑞士有限公司 增加抽取式烟雾检测器中的抽吸功率以缩短传输时间
EP4092645A1 (fr) * 2021-05-18 2022-11-23 Siemens Schweiz AG Augmentation de la puissance d'aspiration pour un détecteur de fumée par aspiration (asd) permettant de réduire le temps de transport à une valeur de niveau de signal minimum détecté sans émettre de message d'interruption
US11704987B2 (en) 2021-05-18 2023-07-18 Siemens Schweiz Ag Increasing the suction power in an aspirating smoke detector (ASD) to shorten the transport time from a detected minimum signal level value without the output of an interruption signal
EP4109429A1 (fr) * 2021-06-21 2022-12-28 Carrier Corporation Fonctionnement d'un système de détecteur d'incendie à aspiration
US12268912B2 (en) 2021-06-21 2025-04-08 Carrier Corporation Operating an aspirating fire detector system
US20240029532A1 (en) * 2022-05-18 2024-01-25 Carrier Corporation Condensation monitoring in aspirating smoke detection systems
US12592137B2 (en) * 2022-05-18 2026-03-31 Kidde Fire Protection, Llc Condensation monitoring in aspirating smoke detection systems

Also Published As

Publication number Publication date
EP1638062B1 (fr) 2008-06-25
ES2309630T3 (es) 2008-12-16
DE102004044094A1 (de) 2006-03-30
DE502005004504D1 (de) 2008-08-07
PT1638062E (pt) 2008-09-17
ATE399357T1 (de) 2008-07-15

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