EP2940665A2 - Dispositif d'alarme - Google Patents

Dispositif d'alarme Download PDF

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Publication number
EP2940665A2
EP2940665A2 EP15165712.9A EP15165712A EP2940665A2 EP 2940665 A2 EP2940665 A2 EP 2940665A2 EP 15165712 A EP15165712 A EP 15165712A EP 2940665 A2 EP2940665 A2 EP 2940665A2
Authority
EP
European Patent Office
Prior art keywords
measuring chamber
opening
housing
hazard detector
pressure equalization
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.)
Withdrawn
Application number
EP15165712.9A
Other languages
German (de)
English (en)
Other versions
EP2940665A3 (fr
Inventor
Sascha Ludwig
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.)
Job Lizenz GmbH and Co KG
Original Assignee
Job Lizenz GmbH and Co KG
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 Job Lizenz GmbH and Co KG filed Critical Job Lizenz GmbH and Co KG
Publication of EP2940665A2 publication Critical patent/EP2940665A2/fr
Publication of EP2940665A3 publication Critical patent/EP2940665A3/fr
Withdrawn legal-status Critical Current

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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
    • 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

Definitions

  • the invention relates to a hazard detector, in particular a smoke detector.
  • Smoke detectors are usually mounted on ceilings and are used to detect smoke in case of fire. For this they have a measuring chamber with one or more inlet openings through which smoke can penetrate into the measuring chamber. In the measuring chamber, for example, an optical detection device is arranged which detects the entry of smoke into the measuring chamber on the basis of a changed scattering behavior for light emitted by the optical detection device. If a permitted smoke concentration in the measuring chamber is exceeded, an optical and / or acoustic alarm is triggered.
  • hazard alarms often have an actuating element, by the actuation of which the proper function of the detection device can be tested. It is also known to switch off an example unwanted alarm by pressing the actuator.
  • hazard alarms can be supplied with electrical energy via a power connection integrated in the wall. This, however, a considerable installation effort is connected. This is especially true when in buildings a large number of danger detectors must be installed, which is the case regularly. It is therefore also known to equip hazard alarm with a battery as an electrical energy source to keep installation costs low. However, a considerable amount of maintenance is associated with this type of energy supply. So the batteries must be replaced regularly by staff on site.
  • a smoke detector in which the approximately a cylindrical volume forming measuring chamber of a bottom surface, a top surface and circumferentially arranged in two concentric rows of rings Baffles is limited, being formed between adjacent baffles passage openings for flue gas.
  • the flue gas thus enters the circumference of the measuring chamber.
  • all guide walls are aligned obliquely to the respective radial direction, that a guide wall of the outer ring row is always arranged almost perpendicular to a corresponding guide wall of the inner ring row.
  • the DE 36 08 393 A1 discloses a smoke detector with a measuring chamber formed within a housing.
  • the measuring chamber is bounded by a closed at one end by a bottom surface, tubular first housing portion and an axially spaced from the open end of the first housing portion, ceiling-shaped second housing portion, wherein between the housing sections a circumferential inlet opening is formed for flue gas.
  • the present invention seeks to provide a hazard detector, in particular smoke detector, which is characterized by the best possible and especially fast detection behavior.
  • a generic hazard detector comprising at least one (one or more parts) housing with (at least) a measuring chamber formed within the housing, wherein the housing (at least) forms an inlet opening for the measuring chamber, and a detection device for detecting a gas in the measuring chamber , According to the invention by (at least) one Measuring chamber with the environment connecting pressure equalization opening marked.
  • environment means any space located outside the measuring chamber. This can be located both inside and outside the housing of the hazard alarm.
  • an inflow of gas to be detected is supported in the measuring chamber via the inlet opening, as already in the measuring chamber located gas, in particular air, simultaneously exiting via the pressure equalization opening, whereby an overpressure in the measuring chamber is prevented.
  • An inflow of gas to be detected in the measuring chamber can thus be accelerated and thereby the reaction time of the hazard detector for the detection of a gas can be shortened.
  • the size of the opening area of the inlet opening is a multiple of the size of the opening area of the pressure equalization opening.
  • the size of the opening area of the pressure compensation opening can only amount to a maximum of 10%, preferably to a maximum of 5% and particularly preferably to a maximum of 1% of the size of the opening area of the inlet opening.
  • the size of the opening area of the inlet opening may further be preferred for the size of the opening area of the inlet opening to be a multiple of the total size of the opening areas of all pressure equalization openings. It can also be provided here that the total size of the opening areas of all the pressure compensation opening is only a maximum of 10%, preferably not more than 5% and particularly preferably not more than 1% of the size of the opening area of the inlet opening.
  • the pressure compensation opening may preferably be provided that this is arranged as far away from the inlet opening.
  • these are arranged on opposite sides of the measuring chamber.
  • the measuring chamber is bounded by a bottom surface, a tubular housing portion and a ceiling-shaped housing portion, wherein the deckeriförmige housing portion axially with respect to a longitudinal axis of the measuring chamber spaced from the tubular housing portion is arranged so that between them the (preferably completely encircling) inlet opening is formed.
  • the measuring chamber and in particular the inlet opening can be characterized by a good flow behavior of gas to be detected upon entering the measuring chamber.
  • the cross-sectional shape of the tubular housing portion may be formed as desired, wherein preferably a (partially) annular and in particular (partially) annular configuration may be provided. Square cross-sectional shapes are also possible.
  • the width of the circumferential inlet opening is preferably a maximum of 1.25 mm in order to prevent foreign bodies from entering the measuring chamber.
  • the pressure equalization opening is integrated in the bottom surface. This results in the greatest possible distance between the inlet opening and the pressure equalization opening.
  • the pressure equalization opening is arranged centrally within the bottom surface.
  • it can be achieved by passing gas flowing into the measuring chamber in the direction of the center of the measuring chamber.
  • the danger detector according to the invention comprises a plurality of pressure equalization openings, it can be preferably provided that at least some of these pressure equalization openings are integrated annularly around the longitudinal axis in the bottom surface.
  • the detection device comprises at least two optical detection elements which are aligned such that their optical axes intersect each other and the longitudinal axis of the measuring chamber at one point.
  • a primary detection area can be defined, which is located centrally within the measuring chamber.
  • the danger detector shown in the drawings comprises a housing with a lower housing part 1, a housing upper part 2, a between the housing lower part 1 and the upper housing part 2 arranged functional unit 3 and a functional module 4, based on the functional unit 3, on the another side of a housing formed by the lower part 1 partition 5 is arranged.
  • An underside of the lower housing part 1 or of the danger detector is provided for installation and attachment to a surface, in particular on a ceiling or wall of a room.
  • a bottom plate of the housing may be provided, which is detachably connectable to the lower housing part 1.
  • This makes it possible to attach the bottom plate initially independent of the lower housing part 1 to the surface, for example by screwing, and only then to connect the lower housing part 1 and the entire remainder of the danger detector with the bottom plate. This can be done for example via between the bottom plate and the lower housing part 1 formed latching connections and / or a bayonet connection.
  • the base plate may be formed such that it partially or completely closes the receiving space formed by the lower housing part 1 and accommodating the functional module 4.
  • the lower housing part 1 forms on the housing upper part 2 facing side of its partition 5 from a tubular housing portion 6, which limits a measuring chamber 7 circumferentially.
  • a bottom surface 8 of the measuring chamber is likewise formed by the dividing wall 5 of the housing lower part 1.
  • open receiving housing 9 In the tubular housing portion 6 two upwards, ie in the direction of the upper housing part 2, open receiving housing 9 are integrated, which serve to receive two at a defined angle to each other, optical detection elements 10 of a detection device.
  • the two detection elements 10, one of which comprises an optical radiation source and the other an optical radiation receiver, are aligned in such a way that their optical axes face each other and a longitudinal axis 11 of the measuring chamber 7 cut in one place.
  • a partition wall 12 protruding into the measuring chamber 7 prevents a direct "visual contact" of the two detection elements 10.
  • control unit (not visible), a sounder 14, an actuator 15 and a connector 16 are fixed and electrically conductive to the circuit board 13 connected. All of these functional elements are arranged on the same surface of the printed circuit board 13.
  • the connector 16 serves to electrically connect the functional module 4 with the functional unit 3.
  • the functional module 4 a corresponding, also connected to a circuit board 17 connector 18 having a plurality of pin contacts, which are provided for engagement with corresponding socket contacts of the connector 16 of the functional unit 3.
  • the pin contacts pass through both the partition wall 5 of the housing base 1, which is provided for this purpose with an opening for all pin contacts, as well as the circuit board 13 of the functional unit 3, which is provided for this purpose with a corresponding number of individual openings.
  • the functional module 4 can, for example, have a radio transceiver unit (not visible), by means of which a radio-based networking of several danger detectors can be set up. This allows, for example, a detected by a hazard detector, triggering an alarm triggering increased concentration of a gas to communicate the networked hazard, in which case a visual and / or audible alarm is triggered by all hazard detectors.
  • the upper housing part 2 forms a cover-shaped housing section 19, which limits the measuring chamber 7 at its upper axial end. In this case, the cover-shaped housing section 19 is arranged at a distance from the free end of the tubular housing section 6 of the housing lower part 1 (cf. Fig.
  • lid-shaped housing portion 19 of the upper housing part 2 extend in the direction of the lower housing part 1 at least two circumferential, spaced in the radial direction of the tubular housing portion 6 collar 21, one of which is disposed on the inside and the other outside of the measuring chamber 7 and so far extend in the direction of the lower housing part 1 that they cover the inlet opening 20 and a piece and the tubular housing portion 6 in the axial direction.
  • the collars 21 serve to prevent penetration of ambient light via the inlet opening 20 into the measuring chamber 7 as much as possible by shielding them.
  • baffles 22 From the outer collar 7 extending with circumferentially substantially uniform pitch radially with respect to the longitudinal axis 11 of the measuring chamber 7 aligned baffles 22. These serve to direct a flow of gas to be detected in the most direct way to the inlet port 20 and thereby a spiral Flow to avoid the outside of the tubular housing portion 6 with a circumferentially directed flow component.
  • the free ends of the baffles 22 are provided for contact with the circuit board 13 of the functional unit 3, while the circuit board 13 of the functional unit in turn rests on the receiving housing 9 formed by the lower housing part 1. As a result, the printed circuit board 13 is held between the lower housing part 1 and the upper housing part 2.
  • the free ends of the baffles 22 are fixed via part-ring-shaped stabilizing elements 23. As a result, these particular in the Installation of the hazard alarm protected against damage due to deformation. Furthermore, it is provided that the radially inner edges of the baffles 22 abut in the mounted state of the danger detector on the outside of the tubular housing portion 6.
  • the measuring chamber 7 bounding surfaces of the lower housing part 1 and the upper housing part 2 are provided with a tooth-shaped contour. This serves to scatter the light emitted by the optical radiation source of the corresponding detection element 10 in order to prevent direct reflection on the optical radiation receiver of the other detection element 10.
  • very small pressure equalization openings 24 are integrated, which connect the measuring chamber 7 with the function module 4 receiving receiving space of the housing in a fluid-conducting manner.
  • the pressure compensation openings 24 define an (oval) ring which surrounds the longitudinal axis 11 of the measuring chamber 7.
  • the pressure compensation openings 24 prevent the formation of an overpressure by gas flowing into the measuring chamber 7, for example flue gas, in that gas, in particular air, contained in the measuring chamber can be removed. This has a positive effect on the velocity of the inflow of gas to be detected into the measuring chamber 7 and thus on the detection speed of the danger detector per se.
  • the upper housing part 2 also still forms two cover sections 25, by which the receiving housings 9 with the detection elements 10 received therein are closed in the mounted state of the danger detector. An intrusion of ambient light into the measuring chamber 7 via the receiving housing 9 is thereby prevented as possible.
  • the functional elements of the hazard alarm are supplied by means of a battery 26 with the required electrical energy for operation.
  • the battery 26 is arranged in a battery compartment, which is arranged for the most part within the receiving module of the housing, which also accommodates the functional module 4.
  • the battery compartment is bounded at the top by a section of the circuit board 13 of the functional unit 3, downwardly from the bottom plate and laterally by the insides of a through opening 27 formed in the partition wall 5 of the lower housing part 1, and the battery 26 thus securely held within the danger detector.
  • An electrically conductive connection between the poles of the battery 26 and corresponding contact points 28 of the circuit board 13 of the functional unit 3 is realized by means of contact elements 29.
  • Each of the contact elements 29 comprises two contact tabs 30, wherein the contact tabs 30 extend in the direction of the printed circuit board 13 and each contact one of the contact points 28 on the printed circuit board 13 with their end sections (cf. Fig. 4 ).
  • the contact tabs 30 are at least slightly deformed elastically in the assembled state of the hazard alarm, whereby a sufficiently large contact pressure is provided.
  • the contact elements 29 and the printed conductors of the circuit boards 13, 17 are executed gold-plated.
  • the functional unit 3 which, with the exception of the battery 26, integrates all functional elements necessary for the basic operation of the hazard alarm, is placed on the corresponding side on the lower housing part 1, to which the contact elements 29 for the battery 26 have already been attached.
  • the non-rotationally symmetrical shape of the outside of the tubular housing section 6 and the corresponding section of the printed circuit board 13 of the functional unit 3 ensures that this placement only in one Alignment of the functional unit 3 is possible.
  • the upper housing part 2 is placed on the lower housing part 1 and the functional unit 3.
  • a trained by the lower housing part 1 mounting web 31 protrudes through a corresponding passage opening 32 in the circuit board 13 of the functional unit 3 and into a corresponding mounting opening 33 of the upper housing part 2.
  • the danger detector depending on the intended use, can still be equipped with the functional module 4 and thus further preassembled.
  • the functional module 4 integrates those functional elements which, such as the radio transceiver unit, may optionally be present, but need not be present for the basic operation of the hazard alarm.
  • the loading of the hazard detector with the function module 4 can be done by simply inserting into the formed by the lower housing part 1 receiving space with simultaneous connection of the connector 16, 18.
  • the thus possibly adapted to the intended use hazard alarm can then be fitted with the battery 26 and connected to the intended use position with a bolted to a floor or wall surface base plate.
  • a functional test can be carried out and / or a network of a plurality of corresponding danger detectors can be made.
  • an unillustrated housing cover can still be placed and secured via a bayonet connection.
  • the lower housing part 1 forms closure tabs 34 for this purpose.
  • the housing cover surrounds the upper housing part 2 and the functional unit 3 and thus protects them from damage due to external trauma. Through openings in the housing cover simultaneously ensure that gas to be detected can flow into the measuring chamber 7.

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Measuring Fluid Pressure (AREA)
EP15165712.9A 2014-04-30 2015-04-29 Dispositif d'alarme Withdrawn EP2940665A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102014106118.7A DE102014106118A1 (de) 2014-04-30 2014-04-30 Gefahrenmelder

Publications (2)

Publication Number Publication Date
EP2940665A2 true EP2940665A2 (fr) 2015-11-04
EP2940665A3 EP2940665A3 (fr) 2015-11-11

Family

ID=53015664

Family Applications (1)

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EP15165712.9A Withdrawn EP2940665A3 (fr) 2014-04-30 2015-04-29 Dispositif d'alarme

Country Status (2)

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EP (1) EP2940665A3 (fr)
DE (1) DE102014106118A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020106398A1 (fr) * 2018-11-20 2020-05-28 Carrier Corporation Détecteur de fumée

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3608393A1 (de) 1986-03-13 1987-09-17 Preussag Ag Feuerschutz Optischer rauchmelder
WO2001050432A1 (fr) 1999-12-31 2001-07-12 Digital Security Controls, Ltd. Detecteur photoelectrique de fumee et chambre correspondante

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708675A (en) * 1969-09-19 1973-01-02 Furukawa Electric Co Ltd Smoke detector in which air entrance and egress are located in oppositely disposed surfaces which are shaped to cause an air velocity differential
JP4432960B2 (ja) * 2006-11-29 2010-03-17 パナソニック電工株式会社 火災感知器
JP2009053980A (ja) * 2007-08-28 2009-03-12 Panasonic Electric Works Co Ltd 煙感知器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3608393A1 (de) 1986-03-13 1987-09-17 Preussag Ag Feuerschutz Optischer rauchmelder
WO2001050432A1 (fr) 1999-12-31 2001-07-12 Digital Security Controls, Ltd. Detecteur photoelectrique de fumee et chambre correspondante

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020106398A1 (fr) * 2018-11-20 2020-05-28 Carrier Corporation Détecteur de fumée
US11322006B2 (en) 2018-11-20 2022-05-03 Carrier Corporation Smoke detector

Also Published As

Publication number Publication date
EP2940665A3 (fr) 2015-11-11
DE102014106118A1 (de) 2015-11-05

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