EP4358053B1 - Selbstreinigende rauchmeldervorrichtung und verfahren dafür - Google Patents

Selbstreinigende rauchmeldervorrichtung und verfahren dafür

Info

Publication number
EP4358053B1
EP4358053B1 EP22201782.4A EP22201782A EP4358053B1 EP 4358053 B1 EP4358053 B1 EP 4358053B1 EP 22201782 A EP22201782 A EP 22201782A EP 4358053 B1 EP4358053 B1 EP 4358053B1
Authority
EP
European Patent Office
Prior art keywords
dark chamber
self
light
dust
detector device
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.)
Active
Application number
EP22201782.4A
Other languages
English (en)
French (fr)
Other versions
EP4358053A1 (de
Inventor
Filipe Barbosa
Luis Moutinho
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to EP22201782.4A priority Critical patent/EP4358053B1/de
Publication of EP4358053A1 publication Critical patent/EP4358053A1/de
Application granted granted Critical
Publication of EP4358053B1 publication Critical patent/EP4358053B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • 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
    • 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
    • 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 present disclosure belongs to the technical field of smoke detectors, and more particularly to self-cleaning smoke detectors, also interchangeably referred to as fire detectors.
  • the main operating principle of existing commercial automatic fire detector devices is based on multi-sensorial systems for the detection and measurement of three main fire phenomena: (i) heat, (ii) carbon monoxide, and (iii) smoke.
  • the sensorial system for the latter phenomenon typically exploits the Rayleigh light scattering effect to detect the concentration (and possibly the size) of smoke particles in the surrounding environment.
  • Document EP1857989B2 providing a fire alarm device e.g. smoke alarm unit, for use in e.g. apartment, has self-testing unit for testing permeability of smoke entrance openings in housing, and sensor for optically and/or acoustically sensing opening.
  • the device has a housing and a self-testing unit for testing permeability of smoke entrance openings in the housing.
  • a sensor is provided for optically and/or acoustically sensing the opening, where the sensor is a distance sensor and/or light sensor.
  • the sensor is arranged in such a manner that a space is formed from the opening up to a fire detection sensor inside the fire alarm device.
  • a reference sensor is provided for measuring an ambient light of the fire alarm device.
  • An independent claim is also included for a method for testing a functional capability of the fire alarm device.
  • Document EP1728224B1 discloses an invention related to a fire detector according to the scattered radiation principle with at least one radiation transmitter and at least one radiation receiver, the radiation paths of which form a scattering volume.
  • the fire detector comprises, in addition to at least one first radiation transmitter (5.1) and a first radiation receiver, at least one second radiation transmitter (5.2) and a second radiation receiver, which form at least two locally spaced scattering volumes with their radiation paths.
  • document US 3 681603 A discloses a smoke detector with at least one smoke measuring chamber
  • document US 2021/302303 A1 discloses a cleaning system for a smoke detector.
  • Document JP 5 357955 B2 discloses a fire alarm system which detects smoke at the time of a fire outbreak.
  • the present disclosure discloses a self-cleaning smoke device for detecting a presence of smoke particles in an ambient air within a monitored space.
  • the present disclosure is composed of three components: (i) light-emitting sources, e.g., light-emitting diode (LED), for possibly different light wavelengths, (ii) light-sensing receptors, e.g. photodiodes, and (iii) a so-called "smoke chamber", an enclosure to contain the former elements in a dark environment.
  • the detection principle is simple: the LEDs send light into the smoke chamber, where it is absorbed by a labyrinth structure; in the event of a fire, smoke particles enter the chamber through small inlet openings, scattering light towards the photodiodes that then convert the quantity of light into a proportional electrical signal.
  • the invention according to claim 1 defines a self-cleaning smoke detector device for detecting a presence of smoke particles in ambient air, comprising: at least one emitter for emitting a light with one or more light wavelengths; at least one receiver for providing an output signal of the light received from the emitter; a dark chamber with one or more inlet openings for receiving the smoke particles of the ambient air, within which the emitter and receiver are oppositely mounted for scattering the light towards the receiver and preventing the light from the emitter from being directly received by the receiver; a vibration motor coupled to the dark chamber for shaking dust build-up within the dark chamber; at least one outlet opening arranged inside the dark chamber, for letting out shaken dust; an electronic data processor configured for actuating the vibration motor for shaking the dust inside the dark chamber.
  • the light is preferably visible light with wavelengths between 380 nm and 800 nm and/or ultraviolet light and/or infrared light.
  • the outlet opening is placed at a central position in respect of the dark chamber to let out shaken dust from inside dark chamber.
  • the outlet opening is placed at a peripheral position in respect of the dark chamber to let out shaken dust from inside dark chamber.
  • the outlet opening comprises a meandering channel for reducing an exterior light to enter the dark chamber.
  • the meandering channel comprises one or more inclined surfaces for reducing dust build-up.
  • said device comprises an additional vibration motor, wherein the two vibration motors are oppositely mounted inside the dark chamber.
  • said electronic data processor is further configured for controlling each vibration motor such that only a vibration motor is actuated at a time or both vibration motors are actuated simultaneously.
  • said electronic data processor is further configured for changing a vibration frequency of the motor such that only the vibration frequency of the vibration motor is actuated at a time or both vibration frequencies of the vibration motors are changed simultaneously.
  • said device comprises a dust repellent coating inside the dark chamber.
  • the dust repellent coating is nano-phase silica, titania, oxide, hydrophobic resin with nanometre particulates, or combinations thereof.
  • the dark chamber comprises a further electrostatic repulsion circuitry for reducing dust build-up inside the dark chamber and the electronic data processor is further configured for actuating the electrostatic repulsion circuitry for reducing dust build-up inside the dark chamber.
  • the vibration motor is an eccentric rotating mass vibration motor or a piezoelectric vibrator.
  • the vibration motor is coupled to the dark chamber (2) for shaking dust build-up on the emitter and/or receiver.
  • the invention according to claim 13 defines a computer-based method for sensing a presence of smoke particles in an ambient air, using a self-cleaning smoke detector device comprising: at least one emitter for emitting a light with one or more light wavelengths; at least one receiver for providing an output signal of the light received from the emitter; a dark chamber with one or more inlet openings for receiving the smoke particles of the ambient air, within which the emitter and receiver are oppositely mounted for scattering the light towards the receiver and preventing the light from the emitter from being directly received by the receiver; a vibration motor coupled to the dark chamber for shaking dust build-up; at least one outlet opening arranged inside the dark chamber, for letting out shaken dust; an electronic data processor; wherein the method comprises the step of the electronic data processor actuating the vibration motor for shaking the dust inside the dark chamber.
  • said dark chamber comprises a further electrostatic repulsion circuitry for reducing dust build-up inside the dark chamber and the method further comprises the step of the electronic data processor actuating the electrostatic repulsion circuitry for reducing dust build-up inside the dark chamber.
  • said dark chamber comprises an additional vibration motor, wherein the two vibration motors are oppositely mounted inside the dark chamber (2) and the method further comprises the step of the electronic data processor controlling each vibration motor such that only a vibration motor is actuated at a time or both vibration motors are actuated simultaneously.
  • the present disclosure relates to a self-cleaning smoke detector device for detecting a presence of smoke particles in an ambient air within a monitored space.
  • Figure 1 presents an overview of some of the main components of the present disclosure for a self-cleaning smoke chamber.
  • the cornerstone of the solution is the attachment to the smoke chamber body of eccentric rotating mass vibration motors, similar to those widely found in the haptic systems for smartphones, or piezoelectric vibrators 1.
  • the attachment of two units allows for the generation of alternate vibration patterns (e.g. motor 1 only -> motor 2 only -> both motors simultaneously).
  • the vibration frequency can be dynamically changed. By combining patterns and vibration frequencies, particles of different sizes and mass can be loosened up from the multiple surfaces inside the smoke chamber.
  • the smoke chamber 2 must be designed so there are no perfectly flat walls and surfaces that can collect and trap the loosen dust particles. Additionally, these surfaces guide the particles into the lower levels of the chamber and into specialized outlet holes 3.
  • two possible chamber designs are proposed ( Figure 1 and Figure 2 ).
  • loosen dust particles slide from the lateral surfaces into multiple holes around the lower surface circumference.
  • the lower surface chamfers from the middle to the edge outlet holes so particles falling, for example, from the middle of the chamber also slide into the outlets.
  • a single outlet hole is placed in the middle of the chamber. The lower surface also chamfers towards the hole. Note that all outlet holes may require a light trapping labyrinth structure to reduce the amount of exterior light entering the chamber.
  • the interior of the smoke chamber is treated with a dust repellent coating.
  • the dust repellent coating consist of nano-phase silica, titania, or other oxide coatings.
  • the chamber walls might be lined with an electrostatic repulsion circuitry for more demanding environments.
  • Figure 1 shows an embodiment, comprising: at least one emitter for emitting a light with one or more light wavelengths; at least one receiver for providing an output signal of the light received from the emitter; a dark chamber 2 with one or more inlet openings 2 for receiving the smoke particles of the ambient air, within which the emitter and receiver are oppositely mounted for scattering the light towards the receiver and preventing the light from the emitter from being directly received by the receiver; characterized by comprising: a vibration motor coupled to the dark chamber 2 for shaking dust build-up; at least one outlet opening 3 arranged inside dark chamber 2, for letting out shaken dust; an electronic data processor configured for actuating the vibration motor for shaking the dust inside the dark chamber 2.
  • Figure 2 shows an embodiment, wherein the outlet opening 3 is arranged to be placed at a peripheral position to let out shaken dust inside dark chamber 2.
  • the outlet opening 3 is arranged to be placed at a central position to let out shaken dust inside dark chamber 2.

Landscapes

  • 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)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Claims (15)

  1. Selbstreinigende Rauchmeldervorrichtung zum Detektieren einer Anwesenheit von Rauchpartikeln in Umgebungsluft, umfassend:
    mindestens einen Sender zum Emittieren eines Lichts mit einer oder mehreren Lichtwellenlängen; mindestens einen Empfänger zum Bereitstellen eines Ausgangssignals des von dem Sender empfangenen Lichts;
    eine Dunkelkammer (2) mit einer oder mehreren Einlassöffnungen (2) zur Aufnahme der Rauchpartikel der Umgebungsluft, in der der Sender und der Empfänger einander gegenüberliegend montiert sind, um das Licht in Richtung des Empfängers zu streuen und zu verhindern, dass das Licht vom Sender direkt vom Empfänger empfangen wird;
    einen mit der Dunkelkammer (2) gekoppelten Vibrationsmotor zum Abschütteln von Staubansammlungen im Inneren der Dunkelkammer (2);
    einen elektronischen Datenprozessor, ausgelegt zum Betätigen des Vibrationsmotors zum Abschütteln des Staubs im Inneren der Dunkelkammer (2);
    dadurch gekennzeichnet, dass sie Folgendes umfasst:
    mindestens eine im Inneren der Dunkelkammer (2) angeordnete Austrittsöffnung (3) zum Auslassen von abgeschütteltem Staub.
  2. Selbstreinigende Rauchmeldervorrichtung nach Anspruch 1, wobei die Auslassöffnung (3) in einer zentralen Position in Bezug auf die Dunkelkammer (2) platziert ist, um abgeschüttelten Staub aus dem Inneren der Dunkelkammer (2) auszulassen.
  3. Selbstreinigende Rauchmeldervorrichtung nach einem der vorhergehenden Ansprüche, wobei die Auslassöffnung (3) an einer peripheren Position in Bezug auf die Dunkelkammer (2) platziert ist, um abgeschüttelten Staub aus dem Inneren der Dunkelkammer (2) auszulassen.
  4. Selbstreinigende Rauchmeldervorrichtung nach einem der vorhergehenden Ansprüche, wobei die Auslassöffnung (3) einen mäandrierenden Kanal zum Reduzieren eines Außenlichts umfasst, das in die Dunkelkammer (2) eintritt.
  5. Selbstreinigende Rauchmeldervorrichtung nach dem vorhergehenden Anspruch, wobei der mäandrierende Kanal eine oder mehrere geneigte Oberflächen zum Reduzieren von Staubablagerungen umfasst.
  6. Selbstreinigende Rauchmeldervorrichtung nach einem der vorhergehenden Ansprüche, wobei die Vorrichtung einen zusätzlichen Vibrationsmotor umfasst, wobei die zwei Vibrationsmotoren einander gegenüberliegend im Inneren der Dunkelkammer (2) montiert sind.
  7. Selbstreinigende Rauchmeldervorrichtung nach dem vorhergehenden Anspruch, wobei der elektronische Datenprozessor ferner ausgelegt ist zum Steuern jedes Vibrationsmotors, sodass jeweils nur ein Vibrationsmotor betätigt wird oder beide Vibrationsmotoren gleichzeitig betätigt werden.
  8. Selbstreinigende Rauchmeldervorrichtung nach den vorhergehenden Ansprüchen 6 oder 7, wobei der elektronische Datenprozessor ferner ausgelegt ist zum Ändern einer Vibrationsfrequenz des Motors, sodass zu einem Zeitpunkt nur die Vibrationsfrequenz des Vibrationsmotors betätigt wird oder beide Vibrationsfrequenzen der Vibrationsmotoren gleichzeitig geändert werden.
  9. Selbstreinigende Rauchmeldervorrichtung nach einem der vorhergehenden Ansprüche, wobei die Vorrichtung eine staubabweisende Beschichtung im Inneren der Dunkelkammer (2) umfasst.
  10. Selbstreinigende Rauchmeldervorrichtung nach einem der vorhergehenden Ansprüche, wobei die staubabweisende Beschichtung Nanophasen-Siliciumdioxid, Titandioxid, Oxid, hydrophobes Harz mit Nanometerpartikeln oder Kombinationen davon ist.
  11. Selbstreinigende Rauchmeldervorrichtung nach einem der vorhergehenden Ansprüche, wobei die Dunkelkammer (2) eine weitere elektrostatische Abstoßungsschaltungsanordnung zum Reduzieren von Staubablagerungen im Inneren der Dunkelkammer (2) umfasst und der elektronische Datenprozessor ferner ausgelegt ist zum Betätigen der elektrostatischen Abstoßungsschaltungsanordnung zum Reduzieren von Staubablagerungen im Inneren der Dunkelkammer (2).
  12. Selbstreinigende Rauchmeldervorrichtung nach einem der vorhergehenden Ansprüche, wobei der Vibrationsmotor mit der Dunkelkammer (2) zum Abschütteln von Staubansammlungen auf einem Sender zum Emittieren von Licht und/oder Empfänger zum Detektieren von Licht gekoppelt ist.
  13. Computerbasiertes Verfahren zum Erfassen einer Anwesenheit von Rauchpartikeln in einer Umgebungsluft unter Verwendung einer selbstreinigenden Rauchmeldervorrichtung, Folgendes umfassend:
    mindestens einen Sender zum Emittieren eines Lichts mit einer oder mehreren Lichtwellenlängen;
    mindestens einen Empfänger zum Bereitstellen eines Ausgangssignals des von dem Sender empfangenen Lichts;
    eine Dunkelkammer (2) mit einer oder mehreren Einlassöffnungen (2) zur Aufnahme der Rauchpartikel der Umgebungsluft, in der der Sender und der Empfänger einander gegenüberliegend montiert sind, um das Licht in Richtung des Empfängers zu streuen und zu verhindern, dass das Licht vom Sender direkt vom Empfänger empfangen wird;
    einen mit der Dunkelkammer (2) gekoppelten Vibrationsmotor zum Abschütteln von Staubansammlungen; mindestens eine im Inneren der Dunkelkammer (2) angeordnete Auslassöffnung (3) zum Auslassen von abgeschütteltem Staub;
    einen elektronischen Datenprozessor;
    wobei das Verfahren den Schritt umfasst, dass der elektronische Datenprozessor den Vibrationsmotor zum Abschütteln des Staubs im Inneren der Dunkelkammer betätigt (2).
  14. Verfahren nach dem vorhergehenden Anspruch, wobei die Dunkelkammer (2) eine weitere elektrostatische Abstoßungsschaltungsanordnung zum Reduzieren von Staubansammlungen im Inneren der Dunkelkammer (2) umfasst und das Verfahren ferner den Schritt umfasst, dass der elektronische Datenprozessor die elektrostatische Abstoßungsschaltungsanordnung zum Reduzieren von Staubansammlungen im Inneren der Dunkelkammer (2) betätigt.
  15. Verfahren nach den vorhergehenden Ansprüchen 13 oder 14, wobei die Dunkelkammer (2) einen zusätzlichen Vibrationsmotor umfasst, wobei die zwei Vibrationsmotoren einander gegenüberliegend im Inneren der Dunkelkammer (2) montiert sind und das Verfahren ferner den Schritt umfasst, dass der elektronische Datenprozessor jeden Vibrationsmotor so steuert, dass jeweils nur ein Vibrationsmotor betätigt wird oder beide Vibrationsmotoren gleichzeitig betätigt werden.
EP22201782.4A 2022-10-17 2022-10-17 Selbstreinigende rauchmeldervorrichtung und verfahren dafür Active EP4358053B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22201782.4A EP4358053B1 (de) 2022-10-17 2022-10-17 Selbstreinigende rauchmeldervorrichtung und verfahren dafür

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22201782.4A EP4358053B1 (de) 2022-10-17 2022-10-17 Selbstreinigende rauchmeldervorrichtung und verfahren dafür

Publications (2)

Publication Number Publication Date
EP4358053A1 EP4358053A1 (de) 2024-04-24
EP4358053B1 true EP4358053B1 (de) 2025-12-10

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH491449A (de) * 1969-05-19 1970-05-31 Cerberus Ag Rauchdetektoranordnung mit mindestens einer Rauchmesskammer
DE102004001699A1 (de) 2004-01-13 2005-08-04 Robert Bosch Gmbh Brandmelder
DE102006023048C5 (de) 2006-05-17 2014-12-11 Techem Energy Services Gmbh Brandwarnmelder und Verfahren zur Überprüfung dessen Funktionsfähigkeit
JP5357955B2 (ja) * 2011-12-09 2013-12-04 大阪瓦斯株式会社 警報装置
EP3889579B1 (de) * 2020-03-30 2024-12-18 Carrier Corporation Reinigungssystem für einen rauchmelder

Also Published As

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EP4358053A1 (de) 2024-04-24

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