EP2395489A2 - Smoke alarm device - Google Patents

Abstract

The device (1) has penetration preventing elements (101, 124) preventing penetration of ambient light into an inner smoke detection chamber (100). The elements are arranged in planes lying above each other. The elements extend around the chamber in a ring-shape or a ring segment-shape. One of the elements (101) includes a wall (102) surrounding or defining the chamber. Radially arranged elements (113) are arranged between the elements. A ribbed or lamella structure element is arranged on an outer side of a tunnel-like device with a distance to the tunnel-like device.

Description

The invention relates to a smoke detection device having an inner smoke detection space, sensor element, receiver element and a number of the penetration of ambient light in this smoke detection space preventing elements.

Such smoke detectors are known in the art.

For example, the DE 2 0205 194 U1 a so-called smoke collecting case having a hollow case which has a plurality of slots formed in a side wall of the hollow case and a plurality of I-shaped first ribs interposed therebetween, wherein a plurality of second ribs are provided between the first ribs

Another variant of a smoke detection device is from the US 5,400,014 A known. In this, a dark chamber is surrounded by a peripheral wall structure having a number of nested wing-like elements. In this case, the second element of each wing-like element is shorter than the first and branches from this at an angle within its extension. Neighboring vanes accordingly define a meandering path that requires at least three or four reflections of light to reach the interior of the chamber. This serves to avoid the entry of ambient light into the interior of the smoke detection device. Such scattered light would cause the sensor and receiver elements arranged in the smoke detector to receive a false signal that would trigger the smoke detector. Sensor and receiver element are arranged between the wing elements at an angle to each other. Adjacent wing members define bonded channels that lead from the outside of the chamber into the chamber to block light without the air flow substantially. to restrict. Each of the channels includes an outer portion that extends toward the center of the chamber to define a channel entrance that allows entry of smoke with substantially equal resistance from opposite directions. The channels further define second ones and third sections which curve inwardly from the entrance of the chamber towards the chamber, extending in one direction first and then in another direction with a sharp bend.

From the US 4,857,895 A Another variant of such a smoke detection device is known. Here, light from a light source within the smoke chamber of the smoke detector is reflected from an imaging optical component to a first light sensor which measures a reduced electrical signal in the presence of smoke within the chamber, while a second sensor from the light source at an angle receives an elevated electrical signal in the presence of smoke within the chamber. Also in this smoke detection device, the actual inner smoke chamber surrounding wall parts are arranged. These are T-shaped as circle segments in the outer region and also formed in the inner region as a circular segment in a curved L-shape. Furthermore, an M-shaped or W-shaped wall section is additionally arranged opposite the second sensor.

Another variant of a smoke detection device is from the US 3,914,616 A known. Similar to the US 4,857,895 A are here around an inner smoke chamber around circular segment-shaped wall parts offset from one another.

The present invention is based on the object to provide an improved smoke detection device in which the risk of the ingress of ambient light and thus the risk of malfunction of the smoke detection device is further reduced.

The object is achieved for a smoke detection device according to the preamble of claim 1, characterized in that the elements are at least two arranged in superposed planes elements and extend annularly or as ring segments around the smoke detection space around. Further developments of the invention are defined in the dependent claims.

This provides a smoke detection device having an interior smoke detection space, sensor element, receiver element and a number of ambient light intrusion prevention elements into the smoke detection space, where these elements are no longer adjacent to one another as staggered V-shaped wing elements but extend one above the other; so in adjacent, horizontally stacked levels. As a result, the penetration of scattered or ambient light into the smoke detection space can be prevented even better since it can be completely sealed off by the horizontal arrangement of the elements one above the other in the circumferential direction of the smoke detection device.

It proves to be particularly advantageous if at least one of the elements has a wall surrounding or defining the smoke detection space. In this case, at least one of the horizontally stacked elements, which are intended to prevent the penetration of ambient light into the smoke detection space, extends so far inwards into the interior of the smoke detection device that a circumferential wall of the smoke detection space can be defined by the then innermost wall of this element. Above all, in this case sensor element and receiver element are advantageously arranged within the smoke detection space then defined or are arranged so that they are directed into this, wherein they are otherwise completely sealed off from the environment.

Advantageously, the elements for preventing ingress of ambient light into the smoke detection space are formed at an angle to the planes or at an angle to the respective extent of the planes in which they are arranged, or have at least one subarea formed at an angle thereto. The angled configuration can be, for example, V-shaped and / or M-shaped and / or W-shaped. In this case, it is possible to use both partial areas that are evenly angled and partial areas that have different angles to one another. Especially when providing differently angled portions is the possibility of distraction from penetrating ambient light even better than evenly angled sub-areas.

Adjacent elements may not have mutually parallel formed angularly extending portions. This also makes it possible to distract even better penetrating ambient light and keep out of the smoke detection room. In particular, two adjacent elements may be formed differently, advantageously angularly shaped portions, ie in particular V-shaped portions, one above the other or at least slightly offset from each other are arranged one above the other to allow optimal deflection of incident light rays.

Further advantageous are radial radially extending around the smoke detection space around and the penetration of ambient light in this smoke detection space preventing elements provided. In order to form chambers for enclosing the smoke detection space from ambient light, these elements arranged in a radial manner can be arranged particularly advantageously between two adjacent elements arranged one above the other in planes. These radially extending around the smoke detection space extending elements thus extend radially with respect to the smoke detection space, in particular over the entire radial extent of the superimposed elements away. By arranging the radially arranged elements between the adjacent stacked elements they can be particularly well supported on each other and a uniform distance between them created. It is therefore particularly advantageous if the radially arranged elements in the region in which they abut or adjoin the superimposed elements, are formed according to the shape of the elements, ie in particular V-shaped and / or serrated recesses on two opposite Have pages. As a result, they can be supported both on the upper side of the one annularly arranged element and on the underside of the adjacent element arranged above it.

The smoke detection device having an inner smoke detection space, at least one smoke sensor element, and a plurality of ambient light blocking elements in the smoke detection space may, in particular, in addition to the above features, comprise at least one sound passage enabling means adjacent to the smoke detection space, opposite to it , By means of such a device serving as a sound tunnel, after arranging the smoke detection device in a room, the sound emitted by an acoustic warning device in the interior of the smoke detection device can be conducted to the exterior directed into the room.

A particular improvement of the sound emission of the smoke detection device can be achieved in that the sound passage enabling means comprises a tunnel-like device and at least one rib or lamellar structure element, wherein the rib or lamellar structure element is arranged on the outside of the tunnel-like device at a distance from this and extends over at least part of its scope. The ribs or lamellae of the rib or lamellar structure element extend transversely to the planar extent of the elements which lie one above the other and surround the smoke detection space, ie in the mounting situation, usually in the vertical direction with respect to the horizontal extent of the superimposed elements.

The rib or lamellar structure element and the tunnel-like element can be connected to one another by at least one connecting web or a connecting element. As a result, on the one hand a firm connection between the two created and on the other hand, the distance and the position of the rib or lamellar structure element fixed to the outside of the tunnel-like element, so that the once selected optimum position of the rib or lamellar structure element for improving the sound leakage from the smoke detection device is maintained while optimally preventing light from entering the smoke detection room. By providing the at least one rib or lamellar structural element, a passage of smoke is possible there and through which, in comparison to the On top of each other arranged elements arranged transversely to these arranged ribs or lamellae further triggering the smoke detection device from various directions.

In addition to the joining of the rib or lamellar structure element, the tunnel-like element and the connecting web or the connecting element, these can be or be formed as a one-piece element. This can be inserted into a correspondingly dimensioned opening, in particular in at least one of the superimposed elements, and / or be integrally formed with at least one of these elements or partially formed in one piece. The tunnel-like device and / or the rib or lamellar structure element can essentially extend in the intermediate space between the elements arranged one above the other. In particular, the tunnel-like device can protrude through the element arranged in the upper part of the smoke detection device. Here, the rib or lamellar structure element may have a smaller height extent than the tunnel-like device, so that the rib or lamellar structural element extends only between the two superimposed elements, whereas the tunnel-like device through one in the upper or closer to the outside of the smoke detection device arranged element provided opening projects through, so that their sound outlet can be arranged even closer to the outside of the smoke detection device.

In order to provide a particularly good sound emission, that is to say a loud warning signal, at low risk of an ingress of ambient light, the tunnel-like device surrounding at least part of the at least one rib or lamellar structural element may have a cylindrical outer wall with an end-side cover part with an inner through-opening, the inner Through opening advantageously has a smaller diameter than the space enclosed by the cylindrical outer wall space.

Figur 1

eine perspektivische Explosionsansicht einer erfindungsgemäßen Rauchmeldeeinrichtung,

Figur 2

eine perspektivische Ansicht des unteren Teils der Rauchmeldeeinrichtung gemäß Figur 1,

Figur 3

eine Draufsicht auf den unteren Teil der Rauchmeldeeinrichtung gemäß Figur 2,

Figur 4

eine Querschnittsansicht durch die Rauchmeldeeinrichtung gemäß Figur 1,

Figur 5

eine Draufsicht auf den die strahlenförmig angeordneten Elemente enthaltenden Teil der Rauchmeldeeinrichtung gemäß Figur 1,

Figur 6

eine Querschnittsansicht des in Figur 5 gezeigten Teils,

Figur 7

eine perspektivische Ansicht eines Teilbereichs der Rauchmeldeeinrichtung,

Figur 8

eine Draufsicht auf das Chassis der Rauchmeldeeinrichtung gemäß Figur 1,

Figur 9

eine Ansicht von unten auf ein erfindungsgemäßes Element einer erfindungsgemäßen Rauchmeldeeinrichtung in einer zweiten Ausführungsform,

Figur 10

eine Draufsicht auf das Element gemäß Figur 9,

Figur 11

eine Querschnittsansicht entlang der Linie A-A aus Figur 10 durch das Element gemäß Figur 9,

Figur 12

eine perspektivische Ansicht des Elements gemäß Figur 9,

Figur 13

eine perspektivische Ansicht eines zweiten über dem in den Figuren 9 bis 12 gezeigten Element angeordneten erfindungsgemäßen Elements,

Figur 14

eine Draufsicht auf das Element gemäß Figur 13, und

Figur 15

eine Querschnittsansicht entlang der Linie B-B aus Figur 14 durch das Element gemäß Figur 14.

For further explanation of the invention embodiments of this will be described in more detail below with reference to the drawings. These show in:

FIG. 1

an exploded perspective view of a smoke detection device according to the invention,

FIG. 2

a perspective view of the lower part of the smoke detection device according to FIG. 1 .

FIG. 3

a plan view of the lower part of the smoke detection device according to FIG. 2 .

FIG. 4

a cross-sectional view through the smoke detector according to FIG. 1 .

FIG. 5

a plan view of the radially arranged elements containing part of the smoke detection device according to FIG. 1 .

FIG. 6

a cross-sectional view of in FIG. 5 shown part,

FIG. 7

a perspective view of a portion of the smoke detector,

FIG. 8

a plan view of the chassis of the smoke detection device according to FIG. 1 .

FIG. 9

a view from below of an inventive element of a smoke detection device according to the invention in a second embodiment,

FIG. 10

a plan view of the element according to FIG. 9 .

FIG. 11

a cross-sectional view taken along the line AA FIG. 10 by the element according to FIG. 9 .

FIG. 12

a perspective view of the element according to FIG. 9 .

FIG. 13

a perspective view of a second above the in the FIGS. 9 to 12 element shown arranged element according to the invention,

FIG. 14

a plan view of the element according to FIG. 13 , and

FIG. 15

a cross-sectional view taken along the line BB FIG. 14 by the element according to FIG. 14 ,

FIG. 1 shows an exploded view of an embodiment of a smoke detector 1. The smoke detector 1 has a lower part 10, a middle part 11 and an upper part 12. The middle part has an annular element 111 formed from a lattice-type material, that is to say a material provided with passage openings 110. The upper part 12 is formed as a closed lid, as in particular also the cross-sectional view in FIG. 4 can be removed. Inside the lower part 10, a smoke detection room 100 is arranged. In this or below this, an infrared sensor element 2 is arranged for the detection of smoke. This consists mostly of transmitter and receiver element.

The upper part 12 has an outer lid-like part 120 provided with a central recess 120a and opening 120b, in which a transparent or translucent cover 121 is arranged. Below this, a lamp 122 for indicating the operational readiness may be arranged, as in FIG FIG. 4 to see. On the underside 123 of the outer part 120 directed in the direction of the middle part 11, a first element 124 preventing the penetration of ambient light into the interior of the smoke detection device is provided. This is substantially plate-shaped and has an annular circumferential projecting from the plane of the plate rib-like portion 125. This one is like that FIGS. 4 and 7 can be removed particularly well, designed as a V-shaped offset. The central portion 126 and the circumferential annular edge portion 127 of the first member 124 are flat or flat and lie due to the different lengths of legs 128 and 129 of the cross-sectionally angled or V-shaped portion 125 in mutually parallel planes, so not in a single plane. Due to the different lengths of leg 128 and 129, in conjunction with a second intrusion of ambient light into the interior of the smoke detection device preventing member 101, the best FIG. 4 and 7 can be taken, ambient light from the environment of the smoke detection device 1 are reflected so that it does not penetrate into the interior of the smoke detection device 1 or at least reflected so that it does not interfere with the detection of smoke there, so no false triggering of the smoke detection device 1 leads.

The smoke detection space 100 is bounded by a circumferential and closed wall 102. This is part of the second element 101. The second element 101 has this circumferential wall 102 and a zigzag portion 103 which extends upwards and downwards or in the direction of the first element 124 and in the direction of the bottom of the lower part 10 from the actual Level of the second element extends out. The portion 103 is thus M-shaped, each with legs at different angles 104, 105, 106, 107, such as the FIGS. 4 and 7 can be removed. Although the legs 128 and 129 of the first element 124 lie approximately over the legs 105, 106 of the second element 101, however, the legs 105 and 128 or 106 and 129 are not arranged parallel to one another. This ensures that ambient light, which passes through the annular element 111 or its through-holes 110 through into the intermediate space 112 between the two elements 124 and 101, can be reflected or deflected on the surfaces of the legs such that it does not enter the Smoke detection room 100 passes.

In the space 112 between the two elements 124 and 101 are further radially from the smoke detection space in the outward direction with respect to the lower part 10, so away from the smoke detection space, extending elements 113 are provided. These also serve to prevent the penetration of ambient light into the interior of the smoke detection device 1 or its smoke detection space 100. By arranging the elements 113 in each case at a distance from each other small chambers 114 are formed in connection with the two elements 124 and 101, through which the ambient light can only reach the interior of the smoke detection device. By providing these chambers 114, a special foreclosure of the smoke detection space against ambient light can be provided.

The elements 113 are flat, flat and plate-shaped. Furthermore, they are adapted to the shape of the two elements 124 and 101, so have a transversely to their planar extent a stepped or recessed shape, as particularly good the FIGS. 1 . 2 and in particular 6 can be removed. This gradation is or recesses are provided here at the edge on two opposite sides of the elements 113. Since this edge-shaping is adapted to the shape of the two elements 124 and 101, it may vary from element 113 to element 113 depending on the positioning of the elements 113.

The elements 124, 101 and 113 may be integrally formed, that is, as an element comprising all these elements, as the FIGS. 6 and 7 can be seen. However, they can also be designed as individual juxtaposed or mutually joined elements. The elements or the entire housing of the smoke detection device 1 consists in particular of a plastic.

A sound passage enabling means 3a is shown in FIG FIG. 8 indicated. The FIGS. 9 to 15 show a further embodiment of the two superimposed elements, which here carry the reference numerals 201 and 224. Unlike the embodiment in FIG. 8 is shown, a special type of sound passage enabling device 3 is provided. This includes a tunnel-like device 30 and a rib or lamellar structure element 31 partially surrounding it. The tunnel-like device 30 is cylindrical and has an inner diameter d ₁ , as in FIG FIG. 11 indicated. At its one end 33, it is provided with a cover part 34, which has an inner passage opening 35 with a diameter d ₂ , the diameter d _{2 being} smaller than the diameter d ₁ . This gives a good sound emission, combined with a low probability of light incidence.

In order to transport the sound even better on the (in operation) directed into a room outside of the upper part 12 of the smoke detection device 1 or to be able to guide, the rib or lamellar structure element 31 is provided. It is connected via connecting webs 36 with the tunnel-like device 30. These connecting webs are arranged at a distance from each other. They provide a mechanical and a sound connection between the ribs or Lamellar structure element 31 and the tunnel-like device 30, so the sound tunnel ago.

The ribs or lamellae 37 of the rib or lamellar structure element 31 are arranged transversely to the two elements 201, 224, ie extend approximately parallel to the longitudinal extent of the tunnel-like device 30. In operation, the elements 201 and 224 are arranged approximately horizontally in a space and the ribs or lamellae 37 correspondingly approximately vertically, as for example the FIG. 12 for the element 201 can be removed. The ribs or lamellae 37 are provided in the manner of a palisade fence at a distance from the tunnel-like device 30, for example concentric with its circumferential wall 38. How very good FIG. 10 can be removed, the ribs or fins 37 are arrow-like in cross section, so have two mutually angled leg 371 and 372 on. This shaping supports the sound conduction and particularly prevents an incidence of ambient light in the smoke detection space 100.

In the area in which the sound passage enabling device 3 is arranged, no elements 213 extending radially with respect to the smoke detection space 100 are provided, so that the incidence of ambient light into the smoke detection space 100 in this area, as already mentioned, by the ribbed or louver structure element 31 is prevented as much as possible.

Like that Figures 11 and 12 can be seen particularly well, the tunnel-like device 30 has a greater height extent than the rib or lamellar structure element 31, with h ₁ > h ₂ , where h _{1 is} the height of the tunnel-like device 30 and h _2, the height of the rib or lamellar structural element 31. When the two elements 201 and 224 are arranged one above the other, the rib or lamellar structure element 31 is superimposed therebetween, possibly both in contact with or integral with the element 201, whereas the tunnel-like device 30 is supported by one in the element 224 therefor provided opening 39 protrudes. The rib or lamellar structure element 31 thus rests in the gap 212 between the two elements 201 and 224. The opening 39 is in the Figures 13 and 14 shown and advantageously has only about the outer diameter of the tunnel-like device 30 corresponding opening width or inner diameter.

The element 224 otherwise differs little or not from the element 124, wherein the element 224 also has a circumferential annular edge portion 227 with provided on its underside 227a groove 230 for insertion of the central part 11 and the annular member 111 and of course a rib-like portion 225 and a central portion 226 between the rib-like portion 225 and the circumferential annular portion 227 has.

In addition to the above-mentioned and shown in the figures embodiments of smoke detectors numerous other can be formed, in which each of the elements that prevent the ingress of ambient light into the smoke detection space, at least two in adjacent levels superimposed elements and are annular or as Ring segments extend around the smoke detection room.

LIST OF REFERENCE NUMBERS

1

Smoke detection device

2

Infrared sensor element

3

a sound passage permitting device

10

lower part

11

middle part

12

upper part

30

Rib or lamellar structure element

31

Rib or lamellar structure element

33

The End

34

cover part

35

inner passage opening

36

connecting web

37

Rib or lamella

38

peripheral

39

opening

100

Smoke detection space

101

second, the penetration of ambient light into the interior of the smoke detector preventing element

102

wall

103

zigzag-shaped section

104

leg

105

leg

106

leg

107

leg

110

Through opening

111

annular element

112

gap

113

radiates outwardly from the smoke detection room outwardly extending elements

114

small chamber

120

outer part

120a

central recess

120b

opening

121

transparent or translucent cover

122

lamp

123

bottom

124

the penetration of ambient light into the interior of the smoke detection device preventing the first element

125

ribbed section

126

middle section

127

circumferential annular edge portion

128

leg

129

leg

201

second, the penetration of ambient light into the interior of the smoke detector preventing element

213

Radially extending elements

224

the penetration of ambient light into the interior of the smoke detection device preventing the first element

225

ribbed section

226

middle section

227

circumferential annular edge portion

227a

bottom

230

groove

371

leg

372

leg

Claims (15)

Smoke detection device (1) having an inner smoke detection space (100), at least one smoke sensor element (2) and a number of elements preventing penetration of ambient light into the smoke detection space (100),
characterized in that
the elements are at least two superimposed planes (101, 124, 201, 244) and extend annularly or as ring segments around the smoke detection space (100). Smoke detection device (1) according to claim 1,
characterized in that
the elements (101, 124, 201, 244) are formed at an angle to the respective extent of the planes, or at least have an angular area formed thereon. Smoke detection device (1) according to claim 2,
characterized in that
adjacent elements (101, 124, 201, 244) do not have mutually parallel angled sections. Smoke detection device (1) according to claim 2 or 3,
characterized in that
an element (101, 201) has at least one M-shaped angled subregion (103). Smoke detection device (1) according to one of claims 2 to 4,
characterized in that
an element (124,224) has a V-shaped angled portion (125,225). Smoke detection device (1) according to one of the preceding claims,
characterized in that
at least one of the elements (101, 201) has a wall (102) surrounding or defining the smoke detection space (100). Smoke detection device (1) according to one of the preceding claims, characterized in that
Radially radially extending around the smoke detection space (100) around and the penetration of ambient light in this smoke detection space (100) preventing elements (113,213) are provided. Smoke detection device (1) according to claim 7,
characterized in that
the radially radially arranged elements (113, 213) are arranged between two elements (101, 124, 201, 244) arranged one above the other in parallel planes. Smoke detection device (1) according to claim 7 or 8,
characterized in that
the radially arranged elements (113, 213) in the region in which they abut or adjoin the stacked elements (101, 124, 201, 244) are shaped according to the shape of the elements (101, 124, 201, 244). Smoke detection device (1) according to one of the preceding claims, characterized in that
at least one sound passage enabling device (3) is provided, which extends adjacent to the smoke detection space (100), opposite the latter. Smoke detection device (1) according to claim 10,
characterized in that
the device (3) enabling a sound passage comprises a tunnel-like device (30) and at least one rib or lamellar structure element (31), wherein the rib or Lamellar structure element (31) on the outside of the tunnel-like device (3) is arranged at a distance from the latter and extends over at least part of its circumference. Smoke detection device (1) according to claim 11,
characterized in that
the rib or lamellar structure element (31) and the tunnel-like element (30) are interconnected by at least one connecting web or connecting element (36). Smoke detection device (1) according to claim 12,
characterized in that
the rib or lamellar structure element (31), the tunnel-like element (30) and the connecting web or the connecting element (36) are formed as a one-piece element. Smoke detection device (1) according to one of claims 10 to 13,
characterized in that
the tunnel-like device (30) and / or the rib or lamellar structure element (31) extends substantially in the intermediate space (212) between the superimposed elements (201, 224), in particular the tunnel-like device (30) through the upper part (12). the smoke detector (1) arranged element (224) protrudes therethrough. Smoke detection device (1) according to one of claims 10 to 14,
characterized in that
the tunnel-like device (30) has a cylindrical outer wall (38) with an end-side cover part (34) with an inner passage opening (35), wherein the inner passage opening (35) has a smaller diameter (d ₂ ) than that of the cylindrical outer wall (38 ) enclosed space.

Images