EP2879104B1 - Auxiliary device for a punctual danger alarm for the monitoring of the function of the danger alarm and use of a such device - Google Patents

Description

The invention relates to an additional device for a trained as a point detector hazard detector for monitoring the function of the danger detector. The danger detector is in particular a smoke detector or smoke gas detector.

Furthermore, the invention relates to an arrangement of a trained as a point detector hazard detector and a structurally and / or connection technology adapted thereto, attached to the hazard alarm accessory.

Finally, the invention relates to a use of such an accessory device for monitoring the environment of the danger detector on flow-shielding objects, for monitoring at least one inlet opening of the hazard alarm for contamination and, where appropriate, for monitoring the function of an acoustic alarm transmitter of the hazard alarm.

From the US patent application US 2009/0243843 A1 a device is described which has a mounting base and a detachably attachable thereto smoke detector. On the mounting base, an ultrasonic transmitter and an opposing ultrasonic receiver are mounted so that at least a part of the smoke detector, such as the smoke chamber, intervenes. A change in the shape of the smoke detector, such as by covering with a plastic bag, produces a different modulation or profile of the spatially emitted ultrasonic energy. This change can be detected locally and used to generate an indication of an obstacle. In a local embodiment according to FIG. 4 and FIG. 5 ultrasonic energy is directed to the smoke inlet opening area of a smoke detector, so that a portion of this energy through the smoke chamber in the smoke detector goes through and exits again. This part of the ultrasound energy is then detected in spatially modulated form by a receiver opposite the transmitter.

The considered hazard detectors are preferably smoke detectors, smoke detectors or smoke detectors. Such danger detectors typically have an optical detector unit operating according to the scattered light principle for the detection of smoke particles. Alternatively or additionally, they may have a detector unit operating according to the acoustooptic principle or a gas sensor for detecting flammable gases. Furthermore, such danger detectors may have a temperature sensor for detecting inadmissibly high temperatures in the vicinity of the hazard alarm.

Furthermore, the hazard detector considered can be connected via a common detector line or detector line, in particular via a two-wire line, signal and / or data technology with a security alarm center. They may alternatively or additionally be an autonomous power supply, such as a battery. Furthermore, such hazard alarms may have a radio module for transmitting an alarm message, a warning message or status information to an adjacent hazard detector or to a security alarm center. They can also be set up for forwarding an alarm message, warning message or status information transmitted by a neighboring danger detector to a neighboring danger detector or to a danger control center in the sense of a routing.

According to standard DIN 14676, "smoke detectors for dwellings, apartments and rooms with similar use - installation, operation and maintenance" must be checked at least once a year by a prescribed visual and functional test. The object of the check is, on the one hand, that there are no interfering objects in the surroundings of the smoke alarm device, such as within a radius of half a meter around the danger detector, which is a flow shield can cause the smoke to be detected in a fire. If, on the other hand, inlet openings are present in the housing of such a hazard detector, the permeability of these inlet openings for smoke or for flue gas must also be checked regularly. The verification of such smoke detectors can also be automated.

Based on the above-mentioned prior art, it is an object of the invention to provide a device which simplifies an automated periodic inspection of such danger detector.

It is a further object of the invention to provide a device which allows a subsequent standard-compliant function monitoring of a hazard detector, in particular a smoke detector, in a simple manner.

Finally, it is an object of the invention to provide a suitable arrangement with such a device as well as a suitable use of such a device.

These objects are achieved by the subject-matter of the independent claims. Advantageous embodiments of the present invention are described in the dependent claims.

The object of the invention is achieved by an additional device for a trained as a point detector hazard detector. The additional device is a separate, attachable to the hazard alarm and provided for monitoring the function of the hazard alarm unit. According to the invention, the device has a plurality of transmitting and receiving units distributed around the danger detector in the circumferential direction, wherein the transmitting and receiving units are arranged in a side outer area of the danger detector remote from the danger detector for the detection of objects in the environment of the danger detector. The device has an evaluation unit connected thereto, wherein the evaluation unit is configured to control the respective transmitting units for emitting a signal into the environment of the hazard detector, temporally evaluate a respective signal originating from the receiving units, reflected from objects in the vicinity of the hazard alarm, and to output a first message if a detected object within a predetermined Distance is around the hazard detector and when the reflected signal exceeds a predetermined minimum level.

The essence of the invention is that a conventional hazard detector, in particular a smoke detector, which has no automatic function monitoring on flow-shielding objects in its environment, can be retrofitted to this function subsequently. In the case of a detected object in the vicinity of the hazard alarm then a first message can be issued. This can e.g. by controlling an optical and / or acoustic display unit on the additional device itself and / or by radio to a higher-level alarm panel done.

As a result, a complete or at least almost complete monitoring of the surroundings of the danger detector on flow-shielding objects is advantageously possible. The transmitting units and / or receiving units are preferably distributed uniformly in the circumferential direction. By a temporal evaluation, the determination of the distance of an object to the danger detector is possible according to the echo principle.

According to one embodiment, the device has a central receptacle, in particular a base, for receiving the danger detector. Typically, the danger detectors designed as point detectors are designed for, in particular, detachable mounting on a pedestal or detector base. This simplifies the assembly effort considerably.

It is particularly advantageous if the additional device forms a structurally and, if appropriate, connection technology-compatible detector base.

By "connection technology" is meant that an electrical contact takes place with detector contacts of the recorded danger detector. Typically, smoke detection hazard detectors used in the commercial sector are not set up to emit an audible alarm. Rather, they are designed for operation on a common detector line or detector line, in particular on a two-wire line. Signaling and / or data transmission via this detector line then results in the transmission of an alarm determined by the hazard alarm or a warning to a connected higher-level alarm control panel. About this detector line, which is also referred to as a detector bus, is also the electrical energy supply of the connected hazard detector. Such danger detectors are usually also referred to as smoke detectors in contrast to smoke detectors with audible alarm output in non-commercial area according to the standard DIN 14676.

By the electrical contacting of the recorded danger detector to the additional device according to the invention or by the attachment of the additional device according to the invention to such a hazard detector, data communication with the recorded danger detector is possible. In this case, the additional device according to the invention can have the function of a danger warning center or act as a danger control center. Alternatively or additionally, an electrical power supply of the recorded danger detector can be done by the contacted additional device.

Alternatively or additionally, the additional device may have a constructive and, if appropriate, connection technically compatible base receptacle in order to fasten the additional device to a detector base for simplified installation.

If the additional device has both a pedestal or detector base for a danger detector to be picked up and a preferably opposite base receptacle for mounting the additional device to a pedestal, then such an additional device can also be referred to as a "base".

Preferably, the additional device according to the invention is ring-shaped or ring-segment-shaped or polygonal. Such an additional device can therefore also be referred to as an additional ring. Preferably, the attachment is slightly "over" in the lateral direction, e.g. in a range of 1 cm to 5 cm. With "sideways" directions are here designated away from a constructive main axis of the recorded danger detector. Since most of the known hazard detectors are designed essentially rotationally symmetrical, the additional device preferably also extends in the radial direction beyond the outer lateral dimensions of the danger detector, such as e.g. in a range of 1 cm to 5 cm. In this case, hazard alarms and additional equipment have a common constructive main axis or axis of symmetry.

According to an alternative embodiment to the previous embodiment, the device for lateral enclosure of the danger detector is formed. As a result, the device can be placed on the already mounted danger detector without covering it. Preferably, the inner contour of the auxiliary device is matched to the lateral outer contour of the laterally bordered danger detector.

The evaluation unit can also be set up to weight the respective received reflected signals. Reflected signals from objects closer to the hazard detector may be weighted higher than objects at the edge of the monitored environment. Preferably, the evaluation unit is configured to output the first message only when an object is permanently detected within the monitored environment. With "permanent" a minimum time of presence of several minutes, hours or days is meant.

According to one embodiment, the at least one transmitting unit is an optical transmitting unit, such as e.g. an LED, in particular an infrared light emitting LED, and the at least one receiving unit, an optical receiving unit, in particular a spectrally sensitive photodiode. Both units can be combined to form a unit.

Alternatively or additionally, the at least one transmitting unit may be an acoustic transmitting unit, such as e.g. an ultrasound transmitter, and the at least one receiver unit is an acoustic receiver unit, in particular an ultrasound receiver. Both units can also be combined to form a unit as an ultrasonic transceiver.

Alternatively or additionally, the at least one transmitting unit may be a microwave transmitter and the at least one receiving unit may be a microwave receiver. Both units can also be combined to form a radar unit.

Alternatively or additionally, the at least one transmitting unit may be an acoustic transmitting unit, such as e.g. an ultrasound transmitter, and the at least one receiver unit is an acoustic receiver unit, in particular an ultrasound receiver. Both units can also be combined to form a unit as an ultrasonic transceiver.

Alternatively or additionally, the at least one transmitting unit may be a microwave transmitter and the at least one receiving unit may be a microwave receiver. Both units can also be combined to form a radar unit.

According to a further embodiment, the device has an optical scanning device for one or more inlet openings of a recorded or enclosed danger detector. It also has an associated, i. a data or signal technically associated evaluation on. The evaluation unit is set up to output a second message in the event of a detected impermissible contamination. Preferably, the scanning is carried out by optical means and in particular with infrared light. The optical scanning of the inlet opening takes place outside the recorded danger detector, i. from the outside.

In particular, the optical scanning device has a light transmitter, in particular an infrared LED, for emitting a highly focused light beam. The light transmitter is oriented such that its light beam passes through the at least one inlet opening at a small distance. By "low" is preferably meant a distance to the inlet opening in the range of 1 mm to 10 mm. The optical scanning device furthermore has a light receiver, in particular a photodiode for infrared light. It is provided and aligned for receiving stray light from contaminants from the region of the at least one inlet opening. The evaluation unit connected to the light transmitter and light receiver is set up to output a second message if a received signal originating from the light receiver exceeds a predetermined minimum level. In other words, the second message is output when sufficient stray light is detectable by the pollution in front of the inlet opening.

As an alternative to the preceding embodiment, the optical scanning device can have a plurality of light transmitters, in particular infrared LEDs, in each case for emitting a strongly focused light beam. The respective light emitter is oriented in such a way that its light beam passes through at least one inlet opening at a small distance. By "low" is preferably again meant a distance to the inlet opening in the range of 1 mm to 10 mm. The optical scanning device has a plurality of light receivers, in particular photodiodes sensitive to infrared light, for receiving stray light from contaminants from the region of the at least one inlet opening. The evaluation unit connected to the light transmitters and light receivers is configured to evaluate the received signals originating from the respective light receivers and to output a second message if the result of the evaluation exceeds a predetermined comparison value. This advantageously avoids the output of the second message if only one received signal exceeds a minimum level. Preferably, the second message is only output if half or the majority of the available received signals exceeds the minimum level.

According to a particular embodiment, the device has a contact-based and / or wireless communication interface for data communication between a control unit of the recorded danger detector and an evaluation unit of the additional device.

The contact-based communication interface can also be an existing interface of a hazard alarm, which is for contacting the hazard alarm via its detector contacts on a detector line or on a Detector bus are provided. The contact-type interface can also be a separate interface, which contacts corresponding mating contacts of the additional device after attaching the danger detector to the additional device.

The wireless communication interface may e.g. a so-called NFC interface (for Near Field Communication), which allows data transmission on inductively coupled paths to and from another NFC interface in the recorded danger detector in the range of a few centimeters. In addition, in this way an electrical energy transfer from the auxiliary device to the danger detector for electrical supply of the danger detector is possible.

By both communication interfaces in principle a data access of the evaluation of the additional device to the control unit of the recorded danger detector is possible. With appropriate configuration of the hazard detector thus an indirect access to the output and input units of the hazard detector is possible.

According to a further embodiment, the device has a plurality of distributed light emitters for emitting in each case a light beam. The respective light beam is directed to the at least one inlet opening of a recorded or enclosed danger detector. The light beam is preferably from an infrared LED. With these, the evaluation unit for driving the light emitter is connected and adapted to issue a second message, if a transmitted from the danger detector via the communication interface light reception signal, which comes from a light receiver inside the danger detector, falls below a predetermined value. Preferably, the light receiver is inside the danger detector at the same time provided for the scattered light smoke detection light receiver. This advantageously makes it possible to check the permeability of the at least one entry opening in the danger detector.

According to an advantageous embodiment, the device has an acoustic alarm and / or an alarm flasher. The evaluation unit is set up to receive an alarm signal output by the recorded or enclosed danger detector via the communication interface in order to trigger the acoustic alarm transmitter and / or alarm flasher in the event of an alarm. The communication interface may e.g. be an existing interface of a hazard alarm, which are provided for contacting the danger detector via the detector contacts on a detector line or on a detector bus.

The additional device further comprises means for audible or electrical verification of the acoustic alarm and / or means for optical inspection of the alarm strobe. In the acoustic case, the means then be a microphone whose output microphone signal is checked by the evaluation unit for the presence of a predetermined audio frequency and volume level. Alternatively, the means may be an electrical signal detector which checks for the presence of electrical stimulus signals to the audible alarm. In the optical case, the means may be one of the environmental monitoring optical receiving units or one of the pollution monitoring light receivers.

Furthermore, the device is set up to monitor the audible alarm and / or the alarm flasher repeatedly for its functionality, such as e.g. weekly, monthly, quarterly, etc. The evaluation unit is set up to issue a third message if the functional check of the acoustic alarm device and / or the alarm flasher has failed.

According to a further embodiment, the auxiliary device has a radio module, a motion detector, a flue gas sensor, a temperature sensor, a loudspeaker, an acoustic alarm, an alarm flashlight, an emergency lighting and / or a battery. As a result, the functional scope of the additional device according to the invention can advantageously be extended by further safety and comfort functions.

The object of the invention is further achieved by an arrangement of a trained as a point detector hazard detector and from a structurally and / or connection technology adapted thereto, attached to the hazard alarm according to the invention additional device.

Particularly advantageous is the use of an inventive additional device for monitoring the environment of the danger detector on strömungsabschirmende objects, for monitoring at least one entrance of the hazard alarm for contamination and, where appropriate, to monitor the function of an acoustic alarm and / or alarm flasher of the hazard alarm. In particular, the danger detector is then a smoke detector.

FIG 1

ein Beispiel für eine erste und zweite Ausführungsform einer Anordnung aus einer Zusatzeinrichtung und aus einem aufgenommenen Gefahrenmelder gemäss der Erfindung in einer Seitenansicht,

FIG 2

das Beispiel gemäss FIG 1 in einer Draufsicht,

FIG 3

die beispielhafte erste Ausführungsform der erfindungsgemässen Anordnung gemäss FIG 1 in einer Detailansicht und in einer Explosionsdarstellung,

FIG 4

das Beispiel gemäss FIG 3 im betriebsbereiten Zustand der erfindungsgemässen Anordnung,

FIG 5

die beispielhafte zweite Ausführungsform der erfindungsgemässen Anordnung gemäss FIG 1 in einer Detailansicht und in einer Explosionsdarstellung,

FIG 6

das Beispiel gemäss FIG 4 und FIG 5 in einer Draufsicht und in einer gemeinsamen Darstellung,

FIG 7

ein Beispiel für eine dritte Ausführungsform einer Anordnung aus einer Zusatzeinrichtung und aus einem eingefassten Gefahrenmelder gemäss der Erfindung,

FIG 8

das Beispiel gemäss FIG 7 in einer Draufsicht,

FIG 9

ein weiteres Beispiel für eine erste Ausführungsform der Anordnung mit einer ersten Variante einer Verschmutzungsüberwachung gemäss der Erfindung,

FIG 10

ein weiteres Beispiel für eine erste Ausführungsform der Anordnung mit einer zweiten Variante einer Verschmutzungsüberwachung gemäss der Erfindung und

FIG 11

ein beispielhaftes Funktionsschema für alle Anordnungen aus einer beispielhaften Zusatzeinrichtung mit einer Reihe von möglichen Erweiterungsmodulen und aus einem Gefahrenmelder gemäss der Erfindung.

The invention and advantageous embodiments of the present invention can be seen by the example of the following figures. Show

FIG. 1

an example of a first and second embodiment of an arrangement of an additional device and a recorded danger detector according to the invention in a side view,

FIG. 2

the example according to FIG. 1 in a plan view,

FIG. 3

the exemplary first embodiment of the inventive arrangement according to FIG. 1 in a detailed view and in an exploded view,

FIG. 4

the example according to FIG. 3 in the ready state of the inventive arrangement,

FIG. 5

the exemplary second embodiment of the inventive arrangement according to FIG. 1 in a detailed view and in an exploded view,

FIG. 6

the example according to FIG. 4 and FIG. 5 in a plan view and in a common representation,

FIG. 7

an example of a third embodiment of an arrangement of an additional device and a framed danger detector according to the invention,

FIG. 8

the example according to FIG. 7 in a plan view,

FIG. 9

a further example of a first embodiment of the arrangement with a first variant of contamination monitoring according to the invention,

FIG. 10

a further example of a first embodiment of the arrangement with a second variant of contamination monitoring according to the invention and

FIG. 11

an exemplary functional scheme for all arrangements of an exemplary accessory with a number of possible expansion modules and a hazard detector according to the invention.

FIG. 1 shows an example of a first and second embodiment of an arrangement A1, A2 from an additional device R1, R2 and from a recorded danger detector M according to the invention in a side view. The danger detector M shown is designed as a point detector and in the present example a smoke detector. The hazard detector M is structurally designed for attachment to the additional device R1, R2 shown. Both arrangements A1, A2 differ only in that the respectively associated additional device R1, R2 according to the invention is designed to be mounted on a base or to a baseless mounting on the ceiling D shown is. The different arrangements A1, A2 are in detail in the figures 3 to FIG. 5 shown.

According to the invention, the additional device R1, R2 is a separate unit which can be attached to the danger detector M and is provided for monitoring the function of the danger detector M. The additional device R1, R2 shown has, for example, five transmitting units S and five receiving units E (see FIG FIG. 2 ) for the detection of objects OB in the vicinity of the hazard detector M. In the present example, a rod-shaped object OB is detected within a predetermined hemispherical monitoring area UR around the hazard detector M. For this purpose, the transmitting units S send signals in the environment of the danger detector (symbolized by arrows). The signals reflected on the rod-shaped object OB (symbolized by dashed arrows) are detected by the receiving units E. An evaluation unit, which is not shown in this illustration, then determines on the basis of the reflected signals whether the detected object lies within the monitoring area UR and whether it is suitable for effecting a flow shielding of the danger detector with regard to smoke detection.

In the present example, the transmitting units S and receiving units E are ultrasound transmitters and ultrasound receivers. Transmitter and receiver can also be combined to form a unit as an ultrasonic transceiver.

FIG. 2 shows the example according to FIG. 1 in a top view. It shows a uniformly distributed arrangement of the light emitter S and light receiver E in the circumferential direction of the recorded danger detector M. This allows a nearly complete monitoring of the environment of the danger detector M possible.

FIG. 3 shows the exemplary first embodiment of the inventive arrangement A1 according to FIG. 1 in a detailed view and in an exploded view. In the upper part of the FIG. 3 is a known per se Meltersockel SO, which simplifies the installation of hazard alarms on a ceiling D. Underneath an additional device R1 according to the first embodiment is shown, which already allows a base receptacle SA for attaching the attachment R1 to the base SO. At the same time, the additional device R1 on its opposite side on a central recording, which structurally corresponds to the overlying detector base SO. In the present example can thus in the lower part of the FIG. 3 shown smoke detectors M are mounted both directly on the upper base SO and on the additional device R1. The additional device R1 according to the invention can thus also be referred to as "base" according to the English technical term for such devices. In the present example, the attachment R1 has a cylindrical or cylindrical-conical shape.

FIG. 4 shows the example according to FIG. 3 in the ready state of the inventive arrangement A1. In this representation, it is particularly easy to see how the additional device R1 monitors the environment around the recorded danger detector M on flow-shielding objects OB.

In the FIG. 4 RA is a remote from the danger detector M lateral outer area referred to, which goes a few inches beyond the lateral outer contour AM of the recorded danger detector M. With AR of the radial outer edge of the attachment R1 is designated. With BAT batteries are designated, which are provided for the power supply of the accessory R1. They also serve to supply energy to the recorded danger detector M via not-shown detector contacts in the detector base SO.

FIG. 5 shows the exemplary second embodiment of the inventive arrangement A2 according to FIG. 1 in a detailed view and in an exploded view. In contrast to FIG. 3 missing here the base mount SA for attaching the accessory R2, for example, on the ceiling.

FIG. 6 shows the example according to FIG. 4 and FIG. 5 in a plan view and in a common representation. In this illustration, the uniform distribution of here summarized in each case to a unit transmitting and receiving units S, E can be seen. KS1 denotes a first communication interface which advantageously corresponds to a detector interface already provided when the smoke detector M is received. On the one hand, a data transmission between the evaluation unit of the additional device R1, R2 and a control unit of the smoke detector M is possible via this. On the other hand, an electrical energy supply of the recorded smoke detector M through the additional device R1, R2 is possible via this interface KS1.

FIG. 7 shows an example of a third embodiment of an arrangement A3 of an additional device R3 and a framed danger detector M. Like the FIG. 7 shows, the attachment R1 is now formed as a ring for lateral enclosure of the hazard detector M. In this case, the inner contour of the annular additional device R3 is matched to the lateral outer contour AM of the enclosed danger detector M.

FIG. 8 shows the example according to FIG. 7 in a top view. In this illustration, the ring shape of the exemplary additional device R3 is particularly clearly visible. The FIG. 8 further shows a series of batteries for powering the attachment R3. For data transmission, the additional device R3 and the enclosed danger detector M can each have a wireless communication interface KS2. On the one hand, data transfer between the evaluation unit of the additional device R3 and a control unit of the smoke detector M is possible via this wireless communication interface KS2. On the other hand, an electrical power supply of the recorded smoke detector M through the additional device R3 is possible via this interface KS2 on inductively coupled paths. For data transmission and, where appropriate, for energy transmission, both in the additional device R3 and in the recorded danger detector M each have a circular Be arranged coil, which are preferably concentric with each other. The respective coils can be realized in the form of printed conductors on a respective circuit carrier of the additional device and of the danger detector M.

FIG. 9 shows a further example of a first embodiment of the arrangement A1 with a first variant of contamination monitoring according to the invention. For this purpose, the additional device R1 shown has an optical scanning device SV, EV for an entrance opening OF of the recorded danger detector M and an evaluation unit SER not shown further thereto. The evaluation unit is set up to output a second message M2 in the event of a detected impermissible contamination V.

In the present example, the device has a plurality of light emitters SV arranged distributed to emit in each case a light bundle, which is directed to the at least one inlet opening OF. The evaluation unit is connected to the light emitters SV for driving the light emitters SV and also configured to emit a second message M2, if a transmitted from the hazard detector M via the communication interface light reception signal, which comes from a light receiver SV inside the hazard detector M, a predetermined value below. As in the left part of the FIG. 9 can be seen, the incoming light in the inlet opening OF encounters a contamination V, so that not enough light reaches the arranged inside the danger detector M light receiver EV. This is thus an indication of an impermissible contamination V in the region of the inlet opening OF shown. By contrast, the light emitted by the right-hand light transmitter SV reaches the further light receiver EV in the interior of the danger detector M. The associated inlet opening OF is therefore largely free of contamination V.

Preferably, the second message is suppressed when half or more of the intended receive signals at the light receivers EV exceed the minimum level.

FIG. 10 shows a further example of a first embodiment of the arrangement A1 with a second variant of contamination monitoring according to the invention.

In this case, the optical scanning device SEV has a plurality of light emitters SV each for emitting a highly focused light beam, wherein the respective light emitter SV is aligned such that its light beam passes at least one inlet opening OF at a small distance. Preferably, the light transmitter SV is an infrared LED or an infrared laser diode. The optical scanning device SEV also has a plurality of light receivers EV for receiving stray light of contaminants V from the region of the at least one inlet opening OF. The evaluation unit is signal-technically connected to the light transmitters SV and light receivers EV. It is also set up to evaluate the received signals coming from the respective light receivers EV and to output a second message M2 if the result of the evaluation exceeds a predetermined comparison value.

In the left part of the FIG. 10 It can be seen how scattered light is detected at the left entrance opening OF, while in the right part of the FIG. 10 the emitted light beam passes through the pollution free V entrance opening OF. As a result, no appreciable scattered light signal can be detected by the associated light receiver in the additional device R1. In the present example, a light transmitter and a light receiver are each realized as a common component SEV.

FIG. 11 shows an exemplary functional scheme for all arrangements A1-A3 from an exemplary accessory R1-R3 with a number of possible expansion modules and from a hazard detector M according to the invention.

The inventive additional device R1-R3 typically has a microcontroller as the evaluation unit SER. It also typically includes a number of digital and analog input and output channels.

The attachment R1-R3 may e.g. have a radio module FM, which is connected via a communication bus to the evaluation unit. Via this, the first to third messages M1-M3 can be output, e.g. to a higher level alarm center. Conversely, e.g. Changes to the firmware of the evaluation unit SER are made or adjusted operating parameters.

The additional device R1-R3 may have a manual button on the outside for testing the attachment R1-R3 or the connected hazard detector M.

Furthermore, the attachment R1-R3 may comprise a motion detector, e.g. to detect the presence of persons. Possibly. For example, an alarm message may be issued via the radio module FM when the option R1-R3 is in a burglar monitoring mode, such as a burglar. using the manual button.

The additional device R1-R3 may further comprise a microphone for monitoring an audible alarm. The microphone can also be used for room monitoring in the sense of a "baby monitor".

The attachment R1-R3 may also include a camera. This can be used as a receiving unit for the detection of flow-shielding objects in the environment of the hazard detector, such as e.g. by comparing previous recordings.

Furthermore, the additional device R1-R3 may have a CO gas detector. When detecting increased CO values, an alarm or warning message can then be output.

The attachment R1-R3 may also include a temperature sensor. It can also be issued in the case of a detected high temperature an alarm message.

The additional device R1-R3 may have a speaker for output of stored voice messages in case of alarm. Depending on the messages M1-M3, e.g. a message "Please remove objects in the area of the danger detector", "Please remove contamination at the hazard detector" or "Have the danger monitor checked" must be output.

Furthermore, the inventive additional device R1-R3 may have emergency lighting. This can have several white LEDs. It can e.g. in the event of a fire, the emergency lights are turned on at night during the night.

In the right part of the FIG. 11 schematically the structure of a hazard detector M is shown. With SEM, the control unit of the hazard alarm M is designated. It is also typically a microcontroller. The danger detector M can eg have a battery BAT for self-sufficient energy supply. Alternatively or additionally, a contact-type battery interface BS can be present, via which the hazard detector M can be supplied with energy after attachment to the additional device R1-R3.

If the danger detector M is a smoke detector for operation on a detector line typically in the commercial sector, an acoustic alarm transmitter symbolized as a loudspeaker and a button for testing the smoke detector are not available.

The additional device R1-R3 according to the invention can advantageously expand a smoke detector provided for fire detection in the commercial sector and for operation on a detector line or on a detector bus to include the functionality of automated environmental monitoring on flow-shielding objects as well as contamination monitoring of the inlet openings of the smoke detector.

LIST OF REFERENCE NUMBERS

A1-A3

arrangement

AT THE

Outside contour of the danger detector

AR

outside of

BAT

battery

BS

battery terminal

D

blanket

e

receiver unit

EV

light receiver

FM

radio module

KS1, KS2

Communication Interface

M

Hazard detectors, smoke detectors, smoke detectors

M1-M3

reports

N

insect net

IF

object

OF

inlet opening

OM

optical measuring chamber

P

circuit board

R1-R3

accessory

RA

lateral outside area

S

transmission unit

SA

Recording, socket recording

SE

Transmit / receive unit

SEM

Control unit of the danger detector

SER

Evaluation unit of the additional device

SEV

Light transmitter / receiver

SO

Pedestal, detector base

SV

light source

UR

Monitoring area around the danger detector

V

pollution

Claims (13)

1. Auxiliary device for a hazard alarm (M) constructed as a point type detector, wherein the device is a separate unit that can be attached to the hazard alarm (M) and is provided to monitor the operation of the hazard alarm (M), wherein the device has a plurality of transmitting and receiving units (S, E, SE) distributed in the circumferential direction around the hazard alarm (M), wherein the transmitting and receiving units (S, E, SE) are arranged in a lateral outer region (RA) of the hazard alarm (M) located at a distance from the hazard alarm (M) for the detection of objects (OB) in the vicinity of the hazard alarm (M), and wherein the device has an evaluation unit (SER) connected thereto, wherein the evaluation unit is adapted

   - to control the respective transmitting units (S) to output a signal in the vicinity of the hazard alarm (M),

   - to evaluate in terms of time a respective signal originating from the receiving units (E) and reflected at objects (OB) in the vicinity of the hazard alarm (M), and

   - to output a first signal (M1) if a detected object (OB) is located within a predefined distance around the hazard alarm (M) and if the reflected signal exceeds a predefined minimum level.
2. Device according to claim 1, wherein the transmitting units (S) are optical, acoustic or radio-based transmitting units, in particular based on ultrasound, infrared light or microwaves, and wherein the receiving units (E) are optical, acoustic or radio-based receiving units, in particular based on ultrasound, infrared light or microwaves.
3. Device according to claim 1 or 2, wherein the device has an optical scanning device (SEV, SV, EV) for one or more inlet opening(s) (OF) of a received or bordered hazard alarm (M) and an evaluation unit (SER) connected thereto, and wherein the evaluation unit (SER) emits a second signal (M2) in the event of detected inadmissible contamination (V).
4. Device according to claim 3, wherein the optical scanning device (SEV) has a light transmitter (SV) for emitting a highly bundled light beam, wherein the light transmitter (SV) is oriented in such a way that its light beam passes the at least one inlet opening (OF) at a slight distance, wherein the optical scanning device (SEV) has a light receiver (EV) for receiving scattered light from contamination (V) from the region of the at least one inlet opening (OF), and wherein the evaluation unit (SER) connected to the light transmitter (SV) and light receiver (EV) is adapted to output a second signal (M2) if a received signal originating from the light receiver (EV) exceeds a predefined minimum level.
5. Device according to claim 3, wherein the optical scanning device (SEV) has a plurality of light transmitters (SV) each for transmitting a highly bundled light beam, wherein the respective light transmitter (SV) is oriented in such a way that its light beam passes at least one inlet opening (OF) at a slight distance, wherein the optical scanning device (SEV) has a plurality of light receivers (EV) for receiving scattered light from contamination (V) from the region of the at least one inlet opening (OF), and wherein the evaluation unit (SER) connected to the plurality of light transmitters (SV) and light receivers (EV) is adapted to evaluate the received signals originating from respective light receivers (EV) and to output a second signal (M2) if the result of the evaluation exceeds a predefined reference value.
6. Device according to one of the preceding claims, wherein the device has a contact-based and/or wireless communications interface (KS1, KS2) for data communication between a control unit (SEM) of the received hazard alarm (M) and an evaluation unit (SER) of the auxiliary device (R1-R3).
7. Device according to claim 6, wherein the device has a plurality of distributed light transmitters (SV) for emitting one light bundle respectively which is directed toward the at least one inlet opening (OF) of a received or bordered hazard alarm (M), wherein the evaluation unit (SER) is connected thereto in order to control the light transmitter (SV) and is adapted to output a second signal (M2) if a light receiving signal transmitted from the hazard alarm (M) via the communications interface (K1, K2), and which originates from a light receiver (SV) inside the hazard alarm (M), falls below a predefined value.
8. Device according to claim 6 or 7,

   - wherein the device has an acoustic alarm signalling device and/or an alarm flash,

   - wherein the evaluation unit (SER) is adapted to receive via the communications interface (K1, K2) an alarm signal output in the event of an alarm by the received or bordered hazard alarm (M) in order to then control the acoustic alarm signalling device and/or alarm flash,

   - wherein the device has means for the acoustic or electrical checking of the acoustic alarm signalling device and/or means for visual checking of the alarm flash,

   - wherein the device is adapted to repeatedly monitor the functionality of the acoustic alarm signalling device and/or the alarm flash and

   - wherein the evaluation unit (SER) is adapted to output a third signal (M3) if the acoustic alarm signalling device and/or the alarm flash fail(s) the functional test.
9. Device according to one of claims 6 to 8, wherein the device has a radio module (FM), a motion sensor, a smoke gas sensor, a temperature sensor, a loudspeaker, an acoustic alarm signalling device, an alarm flash, an emergency light and/or a battery (BAT).
10. Device according to one of claims 1 to 9, wherein the device has a central receptacle, in particular a base (SO), to receive the hazard alarm (M).
11. Device according to one of claims 1 to 9, wherein the device is designed for lateral bordering of the hazard alarm (M) .
12. Arrangement comprising a hazard alarm (M) constructed as a point type detector and comprising an auxiliary device (R1-R3) that is matched thereto in terms of construction and/or connections and is attached to the hazard alarm (M) according to one of the preceding claims 1 to 9, according to claim 10 or according to claim 11.
13. Use of an auxiliary device (R1-R1) according to one of claims 1 to 9, according to claim 10 or according to claim 11 for monitoring the vicinity of the hazard alarm (M) for current-shielding objects (OB), for monitoring at least one inlet opening (OF) of the hazard alarm (M) for contamination (V) and optionally for monitoring the function of an acoustic alarm signalling device and/or alarm flash of the hazard alarm (M), wherein the hazard alarm (M) is in particular a smoke alarm.

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