Deflector assembly for a security system obscuration gas generator

Abstract

A smoke generator (200) is presented. The smoke generator (200) comprises a housing (210) and a smoke canister (220) at least partly arranged inside the housing (210). The smoke canister (210) has one or more outlets (222) for emission of smoke, wherein the smoke (10) has a temperature that is higher than an ambient temperature. The smoke generator (200) further comprises at least one deflector assembly, configured to deflect the flow of smoke, and at least one condensation arrangement (120), arranged to collect condensation resulting from cooling of the smoke emitted from the smoke canister (220).

Description

[0001] Deflector assembly for a security system obscuration gas generator

[0002] TECHNICAL FIELD

[0003] The present invention relates to the field of intruder security systems, in particular to an obscuration gas generator for such a system, and a deflector assembly therefor.

[0004] BACKGROUND

[0005] Intruder security systems used in buildings, houses, homes, offices, or other premises, may utilize smoke-generating devices that, upon activation, emits smoke which impairs the sight of an intruder. The smoke-generating devices may comprise a pyrotechnic canister for generation of pyrotechnic gas.

[0006] Such devices have to generate a large amount of cloud gas in a relatively short space of time, and in rapid response to an electric control signal. Also, the devices have to be small in size and acceptable, both in terms of performance and ergonomics, within a room, for example, a domestic setting.

[0007] Some known smoke-generating devices are associated with a risk of scorching surfaces adjacent to where the smoke-generating device is mounted, due to the emission of the hot pyrotechnic gas. Some known smoke-generating devices are also associated with a risk of residues from the smoke, staining adjacent surfaces.

[0008] In WO 2018 / 083684, a smoke generator with a deflector is presented. The smoke deflector is provided with a residual collector to prevent residual and debris from littering the room where the smoke generator is used. The residual collector is arranged as a groove at a floor surface of a deflector cavity. This arrangement is sound, but debris and liquid may still spread form other regions of the deflector and the smoke generator.

[0009] From the above, it is understood that there is room for improvement and the invention aims to solve or at least mitigate the above and other problems.

[0010] SUMMARY

[0011] An object of the present disclosure is to provide a new type of arrangement which is improved over prior art and which eliminates or at least mitigates the drawbacks discussed above. More specifically, an object of the invention is to provide an arrangement that is configured to reduce a risk of disfiguring spots and splashes to the surrounding environment from residual debris, liquid and soot when the arrangement is used to deflect, or otherwise guide, heated smoke. These objects are achieved by the technique set forth in the appended independent claims with preferred embodiments defined in the dependent claims related thereto.

[0012] Aspects of the inventions are defined in the claims.

[0013] Additionally or alternatively, in a first aspect, a deflector assembly is presented. The deflector assembly comprises a body comprising a first surface configured to deflect a flow of smoke having a temperature that is higher than an ambient temperature. The deflector assembly further comprises a condensation arrangement comprising one or more condensation sections arranged to collect condensation resulting from the flow of smoke impinging on the first surface of the body. The condensation arrangement is arranged to impinge the flow of smoke before the flow of smoke impinge on the first surface of the body.

[0014] In one variant, one or more of the condensation sections are provided between two or more first elongate members of the condensation arrangement. This is beneficial as it provides a simple and cost-effective means of providing a condensation arrangement.

[0015] In one variant, the first elongate members are substantially parallel. This is beneficial as the distance between the members is constant, thereby allowing control of e.g. capillary effects between the members.

[0016] In one variant, the condensation arrangement further comprises a plurality of second elongate members intersecting one or more of the first elongate members, thereby providing one or more condensation sections between the second elongate members and the one or more of the first elongate members. This is beneficial as a comparably large amount of condensation sections may be easily provided.

[0017] In one variant, the second elongate members are substantially parallel. This is beneficial as the distance between the members is constant, thereby allowing control of e.g. capillary effects between the members.

[0018] In one variant, the condensation arrangement comprises a mesh and a plurality of condensation sections are formed by openings of the mesh. Forming the condensation arrangement as a mesh provides a simple and cost-effective means of providing a condensation arrangement.

[0019] In one variant, the condensation arrangement is spaced from the first surface of the body. This is beneficial as the full volume between the first surface and the condensation arrangement is available for collecting condensation, thereby increasing the effect of the condensation arrangement.

[0020] In one variant, the distance is in the range of 0,01 to 1 mm, preferably between 0,01 to 0,5 mm. In one variant, the condensation arrangement is a part of the body. This is beneficial as the condensation arrangement will be formed together with the body and thermal transportation between the body and the condensation arrangement will be substantially lossless.

[0021] In one variant, one or more of the condensation sections are dimples provided in the first surface of the body. Dimples are a simple and cost-effective means of providing a condensation arrangement.

[0022] In one variant, at least the body and the condensation sections are formed from a heat resistant material. This is beneficial as it allows for warmer smoke to be deflected by the deflector assembly.

[0023] In one variant, the body and / or the condensation sections are formed from metal. This is beneficial as metal generally has good thermal conductivity and heat resistance.

[0024] In a second aspect, a smoke generator is presented. The smoke generator comprises a smoke canister at least partly arranged inside the housing and having one or more outlets for emission of smoke along an extrusion axis of the smoke canister. The smoke generator further comprises one or more deflector assemblies according to the first aspect and being arrangeable to impinge the emission of smoke from the smoke canister.

[0025] In one variant, at least one deflector assembly is forming part of a nozzle of the smoke generator. This is beneficial as the nozzle is generally used to direct the flow of smoke and condensation may easily occur in the nozzle if no deflector assembly is provided there.

[0026] In one variant, at least one deflector assembly is arranged to distribute the flow of smoke about a distribution axis that is different from the extrusion axis of the smoke canister.

[0027] In one variant, at least one deflector assembly is pivotably coupled to a housing of the smoke generator. This is beneficial as the deflector assembly may be used to cover and protect interiors of the smoke generator housing when no smoke is being deflected.

[0028] In one variant, the smoke generator further comprises a control module configured to control activation of the smoke generator. The control module comprises a transceiver module configured for receiving control instructions from an alarm system.

[0029] In one variant, the transceiver module is a wireless transceiver module.

[0030] In a third aspect, a smoke generator is presented. The smoke generator comprises a housing, a smoke canister at least partly arranged inside the housing and having one or more outlets for emission of smoke along an extrusion axis of the smoke canister. The smoke has a temperature that is higher than an ambient temperature. The smoke generator further comprises a guiding surface configured to guide the emitted smoke, and a mesh arranged adjacent to the guiding surface.

[0031] In one variant, the mesh is a part of the guiding surface.

[0032] In one variant, the mesh is spaced from the guiding surface.

[0033] In one variant, the smoke generator further comprises a control module configured to control activation of the smoke generator. The control module comprises a transceiver module configured for receiving control instructions from an alarm system.

[0034] In one variant the transceiver module is a wireless transceiver module.

[0035] In a fourth aspect, an alarm system is presented. The alarm system comprises an alarm gateway operatively connected to the variants of the smoke generator of the second aspect and / or third aspect comprising the transceiver module. The alarm gateway is configured to provide control instructions to the smoke generator .

[0036] In one variant, the alarm gateway is operatively connected to an alarm receiving centre.

[0037] In one variant the alarm system further comprises the alarm receiving centre.

[0038] In one variant, the alarm receiving centre is configured to cause activation of the smoke generator.

[0039] A further aspect provides an obscuration gas generator, comprising: a housing, a canister (e.g. pyrotechnic canister) arranged at least partly inside the housing and having one or more outlets for emission of obscuration gas along an extrusion axis of the canister, the gas optionally having a temperature that is higher than an ambient temperature, and at least one collector arrangement for collecting condensate and / or soot and / or residues from the gas emitted from the canister.

[0040] The collector arrangement may comprise a condensation arrangement including one or more condensation sections arranged to collect condensation resulting from cooling of the smoke emitted from the smoke canister.

[0041] Additionally or alternatively, the collector arrangement may comprise a mesh structure, optionally provided as a single mesh layer, or as multiple mesh layers overlapping one another at least partly to provide a structure that is deeper and / or has more diverse structure, than a single layer.

[0042] Additionally or alternatively, the collector arrangement may comprise a pattern of members and / or struts and / or ridges and / or depressions that collectively define irregularities or discontinuities in and / or along the flow path for the gas. The pattern may be a repeating pattern, or a non-repeating pattern.

[0043] In some embodiments, the smoke generator further comprises at least one guide assembly and / or deflector assembly comprising: a body having a first surface configured to guide and / or deflect the gas emitted from the canister, and a condensation arrangement arranged to collect condensation resulting from the gas impinging on the first surface of the body.

[0044] In respect of all of the above aspects, condensation may be an important factor relating to residues from obscurating gas, which has not been appreciated in prior art. Humidity may be understood as the concentration of water vapour present in air. The ability of air to hold water vapour is determined by the air pressure and temperature. When the temperature drops, the ability of the air to hold vapour is reduced (assuming constant air pressure). The dew point may be understood as the point to which the temperature has to drop (assuming constant air pressure and humidity) in order to saturate the air with water vapour. When the temperature drops below the dew point (still assuming constant air pressure and humidity), the water vapour will condense and form liquid water. This may be understood as what happens when air comes into contact with a comparably cool surface, such as the bathroom mirror when taking a shower.

[0045] Heated smoke, e.g. any gas with reduced transparency, generally contains vaporized liquids, e.g. water vapour, and particles e.g. soot, that cause the reduced transparency. As the heated smoke cools, the steam will condense and form droplets of water. The particles, the soot, will generally discolour the water potentially leading to the formation of pools or trickles of discoloured water on windowsills and walls etc. which can give rise to the staining of decorative surfaces. In addition, because cooling smoke tends to lead to the depositing of soot and the build-up of sooty deposits it is known to minimise the incidence of obstacles such as turns, strictures, protrusions etc. in smoke flow paths.

[0046] However, in the field of obscuration cloud generators, and in particular in some embodiments described herein, there is a need to guide and / or deflect a flow of smoke. Obscuration cloud generators for home and / or business alarm systems are a premium addition to high end security installations. These generators are generally configured to fill a space with a gas having a reduced transparency. The obscuration cloud generators may be configured to release the gas in response to an alarm event in order to scare e.g. burglars to vacate the home or business. The gas may be produced by an exothermic reaction which means that the produced gas is typically released at a temperature above room temperature. As a result, the gas will tend to rise and fill the space from the ceiling and down giving the burglar time to vacate the home or business at a leisurely pace. In order to avoid this, high-end obscuration cloud generators may be provided with guide and / or deflector assemblies configured to deflect or otherwise direct a flow smoke such that it is redirected to more efficiently fill a space with smoke so that visibility is rapidly reduced so that intruders are encouraged to leave quickly, and also to reduce the risk of the hot gas scoring adjacent surfaces. As the guide / deflector assemblies disrupt the flow of smoke, there is a risk that the smoke will condense on the deflector assembly causing droplets of soot. The droplets may be spread by the flow of the smoke and cause disfiguring spots and splashes to the surrounding environment.

[0047] Incorporating the techniques disclosed above, and explained in more detail below, can significantly reduce such problems, by collecting and controlling condensation, and other residues in the generating gas, without obstructing rapid and efficient generation and dispersal of the gas, nor detracting from other characteristics desired for a security installation.

[0048] BRIEF DESCRIPTION OF THE DRAWINGS

[0049] These and other aspects, features and advantages will be apparent and elucidated from the following description of various variants / embodiments; references being made to the appended diagrammatical drawings which illustrate non-limiting examples of how the concept can be reduced into practice.

[0050] Fig. 1 is cross-sectional view of a prior art body used for deflecting a flow of smoke;

[0051] Fig. 2 is a cross-sectional view of a deflector assembly according to some embodiments of the present disclosure;

[0052] Figs. 3a-b are cross-sectional views of deflector assemblies according to some embodiments of the present disclosure;

[0053] Fig. 4 is a top view of deflector assembly according to some embodiments of the present disclosure;

[0054] Figs. 5a-b are top views of deflector assemblies according to some embodiments of the present disclosure;

[0055] Fig. 6 is a partial cross-sectional view of a deflector assembly according to some embodiments of the present disclosure; Fig. 7a is a cross-sectional view of a deflector assembly according to some embodiments of the present disclosure;

[0056] Fig. 7b is a perspective view of a deflector assembly according to some embodiments of the present disclosure;

[0057] Fig. 8 is a side view of a deflector assembly according to some embodiments of the present disclosure;

[0058] Fig. 9a is a perspective view of a smoke generator according to some embodiments of the present disclosure;

[0059] Fig. 9b is a schematic view of a smoke generator according to some embodiments of the present disclosure;

[0060] Figs. lOa-b are cross-sectional views of smoke generators according to some embodiments of the present disclosure;

[0061] Fig. 11 is a schematic view of a control module according to some embodiments of the present disclosure; and

[0062] Fig. 12 is a schematic view of an alarm system according to some embodiments of the present disclosure.

[0063] DETAILED DESCRIPTION

[0064] Hereinafter, certain embodiments will be described more fully with reference to the accompanying drawings. The invention described throughout this disclosure may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided by way of example so that this disclosure will be thorough and complete, and will fully convey the scope of the invention, such as it is defined in the appended claims, to those skilled in the art.

[0065] The term "coupled" is defined as connected, although not necessarily directly, and not necessarily mechanically. “Coupled” includes two electronic devices in wired or wireless operative communication. Two or more items that are "coupled" may be integral with each other. The terms "a" and "an" are defined as one or more unless this disclosure explicitly requires otherwise. The terms "substantially," "approximately," and "about" are defined as largely, but not necessarily wholly what is specified, as understood by a person of ordinary skill in the art. The terms "comprise" (and any form of comprise, such as "comprises" and "comprising"), "have" (and any form of have, such as "has" and "having"), "include" (and any form of include, such as "includes" and "including") and "contain" (and any form of contain, such as "contains" and "containing") are open-ended linking verbs. As a result, a method that "comprises," "has," "includes" or "contains" one or more steps possesses those one or more steps, but is not limited to possessing only those one or more steps.

[0066] With reference to Fig. 1, a prior art body B usable for deflecting a flow of smoke 10 is presented. The prior art body B is provided with a first surface S which is arranged to deflect the flow of smoke 10. The smoke 10 has a temperature that is higher than an ambient temperature. As is commonly known and presented in the background section of the present disclosure, the smoke 10 will condense when cooled to a certain temperature, and as the prior art body B is at the ambient temperature, the flow of smoke 10 will cause condensation 20 at the first surface S of the prior art body B. The smoke 10 will condense on the first surface S of the prior art body B i.e. the condensation 20 will be formed between an incoming flow of smoke 10 and the first surface S of the prior art body B. As a result, the flow of smoke 10 will effectively be deflected by the condensation 20. This means that, as the smoke 10 flows towards the first surface S of the prior art body B, it will force the condensation 20 to form condensation splashes 20’ that will spread from the first surface S of the prior art body B with the deflected smoke 10.

[0067] The problem with the spread of condensation 20 is addressed by the teachings of the present disclosure. Specifically, by a deflector assembly 100 as show in a cross-sectional view in Fig. 2. The deflector assembly 100 comprises a body 110 having a first surface 115 configured to deflect a flow of smoke 10. In order to reduce the spread of any condensation 20 arising due to the smoke 10 being warmer than the ambient temperature (and the deflector assembly), the deflector assembly 100 further comprise a condensation arrangement 120. The condensation arrangement 120 is arranged to collect condensation 20 resulting from the smoke 10 being deflected off the first surface 115. The condensation arrangement 120 is provided, viewed from the incoming flow of smoke, in front of the first surface 115. That is to say, the condensation arrangement 120 is provided such that the flow of smoke 10 reaches the condensation arrangement 120 before it reaches the first surface 110. Or, in other words, the condensation arrangement 120 is arranged to receive the flow of smoke 10 before the flow of smoke 10 impinge on the first surface 115 of the body 110.

[0068] The condensation arrangement 120 is configured to reduce the amount of condensation 20 that is transported away from the first surface 115 by the deflected smoke 10. That is to say, the condensation arrangement 120 is configured to remove, or at least reduce, the occurrence of condensation splashes 20’ known from the prior art body B of Fig. 1. To this end, the condensation arrangement 120 comprises one or more condensation sections 125. These condensation sections 125 are arranged to collect the condensation 20 as it is formed by the flow of smoke 10 impinging on the first surface 115 of the body 110 and / or the condensation sections 125 themselves. As will be apparent after digestion of the full teachings of the present disclosure, the condensation sections 125 may be provided in any suitable shape, form or size. The shape of the condensation sections 125 will generally depend on the amount of moisture in the smoke 10 and the flow of the smoke 10, e.g. a dynamic pressure exerted by the flow of smoke 10 on the condensation 20 on the first surface 115. Generally, a comparably high flow of smoke 10 will require smaller and a greater number of condensation sections 125 compared to a comparably low flow of smoke 10 at which larger and a fewer number of larger condensation sections 125 may suffice.

[0069] With reference to the side-views of deflector assemblies 100 of Fig. 3 a and 3b, one theory behind the inventive concept of the present disclosure will be presented. In Fig. 3a, a condensation section 125 is formed between two condensation members 122 extending from the first surface 115 of the body 110. The condensation members 122 are spaced apart such that condensation 20 formed between the condensation members 122 is retained within the condensation section 125 by surface tension of the condensation 20. The surface tension is an effect of cohesive forces which form an internal pressure within a pool of liquid and which forces a surfaces of the liquid to contract to a minimum area of the pool of liquid. The condensation section 125 is formed sufficiently small such that the surface tension of the condensation 20 withstands the flow of smoke 10 and also any gravitational forces urging the condensation 20 out of the condensation section 125, so that the liquid (the condensation) remains in place in the condensation section 125. As the condensation section 125 is increased in size, more condensation 20 will be allowed to build up within the condensation section 125 and gravity (if the condensation section 125 faces at least partly down) may overcome the surface tension and cause the condensation to exit the condensation section 125. In fact, as shown in Fig. 3b, the condensation members 122 are not required to extend from the first surface 115 of the body 110, but may be spaced (distanced) from the first surface 115. In the cross-sectional view of Fig. 3b, the condensation members 122 extend along the first surface 115. Also in this embodiment, the condensation 20 is maintained within the condensation section 125 by the surface tension of the condensation 20. A distance d (see Fig. 6) defining a separation between a condensation member 122 and the first surface may be determined experimentally based on an intended mounting orientation of the body 110, a viscosity of the condensation 20 and / or parameters relating to the flow of the smoke 10. Generally, the size of a condensation section 125, i.e. a distance between the condensation members 122 forming the condensation section 125, may be determined based on the intended mounting orientation of the body 110, the viscosity of the condensation 20 and / or parameters relating to the flow of smoke 10.

[0070] One further effect of the condensation members 122 is that they may be configured to shelter the condensation 20 from the flow of the smoke 10, i.e. to ensure that the condensation 20 is leeward from the flow of smoke 10. This effect is increased when the condensation members 122 are attached to the first surface 115 as shown in Fig. 3a, but is present also in the embodiment of Fig. 3b. It should be mentioned that a deflector assemblies 100 may comprise combinations of condensation members 122, meaning that some condensation members 122 may be attached to the first surface 115 and some condensation members 122 may be spaced from the first surface 115. Further, some condensation members 122 may be attached to the first surface 115 along their full longitudinal extension (length), and other may be attached to the first surface 115 only at portions of their longitudinal extension (i.e. intermittently along their length). In some embodiments of the deflector assembly 100, one or more condensation members 122 arranged, compared to other condensation members 122, closest to edges of the body 110 are attached to the first surface 115 and one or more condensation members 122, compared to other condensation members 122, distal (remote) from the edges of the body 110 are spaced from the first surface 115. Such embodiments are beneficial as the condensation members 122 attached to the first surface 115 may prevent condensation 20 from being pushed off the first surface 115 from e.g. the flow of smoke 10 or gravity. This makes control of the distance d between the condensation members 122 and the first surface 115 less important as some condensation 20 may be permitted to move between the condensation members 122 and the first surface 115.

[0071] In Fig. 4, a top plan view of a deflector assembly 100 is shown. The deflector assembly 100 is provided with a condensation arrangement 120 comprising a plurality of condensation members 122 extending substantially in parallel along one direction of the first surface 115. The condensation members 122 may, or may not, be attached to the first surface 115 as explained with reference to Figs. 3a and b. Condensation sections 125 are formed between two adjacent condensation members 122. In this embodiment, the condensation sections 125 are provided with two open sides, such arrangements are beneficial as they are comparably easy and cheap to manufacture. If the deflector assembly 100 is not arranged such that the first surface 115 is substantially horizontal in use, any deviation from the horizontal arrangement is preferably describable by a vector perpendicular to the substantially parallel deflector assemblies 122. Or simply put, the condensation members 122 are preferably arranged longitudinally horizontal even if the deflector arrangement 100 is not horizontal. This means that the deflector assembly 100 is arranged such that gravitational forces will not cause any collected condensation 20 to slide of the sides of the deflector assembly 100.

[0072] In Fig. 5a, a plurality of first elongate condensation members 122 and a plurality of second elongate condensation members 124 are arranged along the first surface 115. As before, the condensation members 122, 124 may, or may not, be attached to the first surface 115 as explained with reference to Figs. 3a and b. The first elongate condensation members 122 and the second elongate condensation members 124 intersect to form condensation sections 125 there-between. In Fig. 5a, the first elongate condensation members 122 are shown as mutually substantially parallel, and the second elongate condensation members 124 are shown as mutually substantially parallel. Further to this, the second elongate condensation members 124 are arranged to intersect the first elongate condensation members 122 at an angle of about 90°, thereby providing rectangular condensation sections 125. However, this is one exemplary non-limiting embodiment, and the first elongate condensation members 122 and / or the second elongate condensation members 124 may very well be mutually arranged at an angle. In some embodiment, the second elongate condensation members 124 are mutually arranged at an angle of about 90° such that they intersect the first elongate members 122 at an angle of about 45°. In such embodiments, the condensation sections 125 are triangular rather than rectangular, rhombic or square. Rectangular, rhombic or square condensation sections are provided when the first elongate condensation members 122 are parallel, the second elongate condensation members 124 are parallel, and the second elongate condensation members 124 are configured to intersect the first elongate condensation members 122 at an angle being in a range above 0° and below 180°.

[0073] In some embodiment as shown in Fig. 5b, the deflector assembly 100 comprises a condensation arrangement 120 in the form of a mesh. The mesh may be formed with triangular, rectangular, rhombic or square openings as previously presented and may be attached to the first surface 115, distanced (spaced) from the first surface, or a combination thereof, i.e. attached to first surface 115 at some sections and spaced from the first surface 115 at other sections. The mesh may be formed in any suitable way e.g. as elongate members 122, 124 (e.g. as described with reference to Fig. 5a), as an expanded metal mesh, as intertwined wires rather in the form of chicken wire (for example as an array of generally hexagonal openings) etc. More generally, it will be appreciated that a condensation arrangement 120 may be provided in the form of a mesh providing an array of generally polygonal (e.g. hexagonal) openings in a matrix of material whether or not the matrix is in the form of wires - for example, the array of openings may be defined by a material removal process or the matrix may be formed using an additive process or some combination of the two. Likewise a condensation arrangement 120 may be provided as an array of circular openings, or other openings with curved sides, defined in a matrix, the array of openings optionally being defined by a material removal process or the matrix being formed using an additive process or some combination of the two.

[0074] Fig. 6, shows the arrangement of Fig. 3b, rotated 90° about a vertical axis. One condensation member 122 of the condensation arrangement 120 can be seen extending along the first surface 115, the condensation arrangement 120 is in this embodiment being arranged at a distance d from the first surface 115. Although the condensation member 122 is illustrated in the form of a single layer (e.g. a single layer of mesh structure), it is envisaged also to provide the condensation arrangement in multiple layers, for example, a laminate structure. For example, at least two (optionally more) layers, each of a mesh structure, may partly overlap one another, and optionally be attached in fixed relation, for example, by welding or riveting. Such a structure may be deeper, and have greater diversity, than a single mesh layer. Where multiple mesh layers are used, at least some of the layers may have the same or similar mesh size and / or structure as one another, and / or at least some of the layers may have different mesh sizes and / or structure.

[0075] In Figs. 7a and b, an alternative embodiment of the deflector assembly 100 is shown. In these embodiments, the condensation arrangement 120 is provided in the body 110 of the deflector assembly 100, i.e. the condensation arrangement 120 is formed as part of the body 110. In other words, the condensation arrangement 120 and the body 110 are provided as one piece. The condensation sections 125 may be formed in any suitable way, and in Fig. 7a and 7b, they are formed as dimples (cavities) in the body 110. In Fig. 7a, a cross-sectional view of a deflector assembly 100 shows the condensation sections 125 as bowl shaped with a bevelled lower section. In other embodiments, the condensation sections 125 may be cylindrical with a substantially flat bottom. Fig. 7b shows a perspective view of a deflector assembly 100 where the condensation arrangement 120 is provided in the body 110. Depending on a thickness and a material of the body, the condensation sections 125 may be provided by means of punching, drilling, etching, laser machining, or formed by one or more additive processes (e.g. casting, moulding, welding, printing), etc. It will be appreciated that the condensation sections 125 may be generally circular in outline, as shown, but may equally have polygonal outlines (e.g. triangular, rectangular, pentagonal, hexagonal, octagonal, etc.), and different condensation sections 125 of a condensation arrangement 120 may have outlines of different forms, shapes, and or sizes.

[0076] Fig. 8 shows another embodiment of the deflector assembly 100 wherein the condensation arrangement 120 is formed as a part of the body 110. The condensation sections 125 may be formed by shaping protrusions or ridges in the body 110 of the deflector assembly 110. Ridges may be formed e.g. to mimic the condensation members 122, 124 according to embodiments previously presented.

[0077] The condensation arrangement 120 is beneficially provided in a heat resistant, or at least heat durable, material. The choice of material may depend on a temperature of the smoke being intended to be deflected. Preferably, the condensation arrangement 120 is made from a metal material or from a ceramic material. In some embodiments, the condensation arrangement 120 is provided in a material exhibiting comparably high thermal conductivity. Preferably, the thermal conductivity of the condensation arrangement 120 is greater than 10 more preferably the thermal conductivity of the condensation arrangement 120 is greater than 100 / 'mj(, and most preferably the thermal conductivity of the condensation arrangement 120 is greater than 200 If the thermal conductivity of the condensation arrangement 120 is high, and the condensation arrangement 120 is attached to, thermally coupled to or forming part of the body 110, the condensation arrangement 120 will act as a heat flange for the body 110 effectively increasing the area of the body 110 being exposed to the smoke 10. The condensation arrangement 120 will effectively decrease a time it takes for the flow of smoke 10 to heat the deflector assembly 100, or at least the body 110 of the deflector assembly 100, from room temperature, to a temperature above the dew point of the smoke 10 such that no further condensation will occur. This will decrease the amount of condensation 20 on the deflector assembly 100 and further reduce the risk of condensation 20 spreading about the deflector assembly 100.

[0078] Although the bodies 110 and deflector assemblies 120 shown in Figs. 1 to 8 are substantially flat, it should be mentioned that this is for illustrative purposes and should in no way be construed as limiting. To exemplify, the first surface 115 may very well be bevelled concave with a curved surface, or even provided on the inside of a cylinder. The teachings of the present disclosure are equally applicable to any suitable shape of the deflector assembly 100, the body 110, the condensation arrangement 120 and / or the first surface 115. Further to this, although the condensation arrangement 120 has been described as part of the deflector assembly 100, this is simply for ease of illustration. A condensation arrangement 120 may be associated with any surface and may be seen as a stand-alone device. For instance, a condensation arrangement 120 in the form of a mesh may be arranged spaced from, or integrated in, any suitable surface where condensation 20 may occur. To this end, a deflector assembly 100 may be considered as any assembly comprising a condensation arrangement 120 as presented herein associated with any suitable surface. This will be exemplified in e.g. Fig. 10b.

[0079] As previously explained, the deflector assembly 100 according to the present disclosure is versatile and applicable to numerous devices. Specifically, as shown in Fig. 9a, the benefits of the deflector assembly 100 are particularly apparent when the deflector assembly 100 forms part of a smoke generator 200. The smoke generator 200 comprises at least one deflector assembly 100 according to the present disclosure. It should be mentioned that the smoke generator 200 may very well comprise a plurality of deflector assemblies 100. Smoke 10 is ejected from the smoke generator 200, or rather, as will be explained elsewhere, from a smoke canister 220 (see Fig. 9b) of the smoke generator 200, along an extrusion axis E. Generally, the deflector assembly 100 is arranged (arrangeable) to receive the emission of smoke from the smoke canister 220. Deflector arrangements 100 may be arranged at any suitable position of the smoke generator 200 where there is a risk of condensation 20 of the smoke 10. Specifically, the deflector assembly 100 may be arranged to deflect extruded smoke 10 such that it is distributed about a deflection axis D, preferably being different from the extrusion axis E. In some embodiments, the deflection axis D may be generally orthogonal to the extrusion axis, whereas in other embodiments, the deflection axis may make an obtuse angle and / or an acute angle with respect to the extrusion axis. For example, the deflection axis may be inclined downwardly away from the smoke generator in the sense of Figs. 9a, 10a and 10b. Such arrangements of the deflector assembly 100 allow the smoke 10 extruded from the smoke canister 220 to be more evenly distributed in a space occupied by the smoke generator 200 without smearing surrounding objects by e.g. sooth or grime originating from condensation of the smoke 10. In some embodiments, the deflector assembly 100 may be funnel-shaped and arranged to focus, direct, spread, or otherwise affect the flow of smoke 10 extruded from the canister 220. The smoke generator 200 shown in Fig. 9 further comprises a housing 210. A deflector assembly 100 is attached to the housing 210 and arranged to intersect the extrusion axis E and deflect smoke along a deflection axis D. The deflector assembly 100 may be fixedly or movably attached to the housing 210, preferably, the deflector assembly 100 is articulated with respect to the housing 210, for example pivoting about a pivot point P.

[0080] In Fig. 9b, a schematic view of a smoke generator 200 according to the present disclosure is shown. The smoke generator 200 comprise a deflector assembly 100 as presented herein, a housing 210 and a smoke canister 220. The smoke generator 200 may further comprise, as will explained elsewhere a nozzle 260 (preferably comprising or consisting of a deflector assembly 100) and a control module 300.

[0081] In Fig. 10a, a cross-sectional view of an example of a smoke generator 200 according to the present disclosure is shown. A smoke canister 220 is arranged inside the housing 210 of the smoke generator 200. It should be mentioned that this is but one exemplary embodiment and the smoke canister 220 may partly or wholly arranged inside the housing 210. The smoke canister 220 is provided with at least one outlet 222. In Fig. 10a, the smoke canister 220 is provided with one outlet 222 that is located such that it opens into an opening 212 of the housing 210. That is to say, with this arrangement, the extrusion axis E of the smoke canister 220 is the same as, i.e. coincides with, the extrusion axis E of the smoke generator 200, but this is not necessarily true for all embodiments. In some embodiments, the deflector assembly 100 may be internal to the housing 210 such that the extrusion axis E of the smoke generator 200 is different from the extrusion axis E of the smoke canister 220. In Fig. 10a, the deflector assembly 100 is pivotably attached to the housing 210 at a pivot point P such that the deflector assembly 100, in a closed position, covers (closes, occludes) the opening 212 of the housing 210 and thereby also said one or more outlets 222 of the smoke canister 220. When the deflector assembly 100 is arranged at an open position, it puts the outlet 222 of the smoke canister 220 in fluid communication with an exterior space (i.e. an outside) of the smoke generator 200.

[0082] In the particular embodiment of Fig. 10a, the smoke generator 200 is provided with a nozzle 260. The nozzle 260 is in this embodiment formed as a ridge around the opening 212 of the housing 210 such that edges of the nozzle 260 forming the opening 212 are facing the deflector assembly 100. The nozzle 260 assists in directing the smoke 10 towards the condensation arrangement 120 of the deflector assembly 100 and reduce a risk of the smoke 10 spreading in unwanted directions. Preferably, the nozzle 260 is provided with a condensation arrangement 120 according the present disclosure. In the embodiment of Fig. 10a, a plenum chamber 265 is formed between the deflector assembly 100 and the outlet 222. The plenum chamber 265 is beneficial as it allows smoke 10 to gather and a pressure of the smoke 10 in the plenum chamber 265 to build up to a point where it is sufficiently high to force the deflector assembly 100 from the closed position to the open position. It should be mentioned that the plenum chamber 265 may be separate from the nozzle 260 and a plenum chamber 265 may be provided without a nozzle 260 being provided in the smoke generator 200. In some embodiments, no plenum chamber 265 is provided but the flow of smoke 10 from the outlet 222 provides sufficient force to overcome any force retaining the deflector assembly 100 at the closed position and move it from the closed position to the open position.

[0083] In Fig. 10b, one embodiment of a smoke generator 200 without a deflector arrangement assembly 100 is shown. It should be mentioned already now, that many of the features of the smoke generator 200 in Fig. 10b may be successfully and beneficially combined with the deflector arrangement 100 of Fig. 10a. The smoke generator 200 of Fig. 10b is similar to the smoke generator of Fig. 10a but rather than having a pivotable deflector arrangement 100, the nozzle 260 of the smoke generator 200 in Fig. 10b is extended to form a fixed smoke guide 160 for the smoke 10 emitted from the smoke canister 220. In Fig. 10b, smoke 10 is emitted through an outlet 222 of the smoke canister 220 and guided through the fixed smoke guide 160 to an opening 212 of the housing 210. As the smoke 10 is guided through the fixed smoke guide 160, the smoke 10 changes directions from a direction along the extrusion axis E to a direction along the deflection axis D by impinging guiding surfaces 205 of the fixed smoke guide 160. This will cause the smoke 10 to cool down and condensation 20 to form on the inner surfaces. However, as seen in Fig, 10b, the guiding surfaces 205 are provided with condensation arrangements 120 arranged to effectively collect any condensation and reduce a risk of soot and grime polluting the surroundings of the smoke generator 200. The smoke generator 200 of Fig. 10b is shown in a cross-sectional view and although not shown, the inner surfaces of the fixed smoke guide 160 may exhibit a crosssection of any suitable shape or form. The guiding surfaces 205 may in some embodiments be formed with e.g. a circular or rectangular cross-section. As presented with reference to the deflector assembly 100, the condensation arrangement 120 may be spaced from the guiding surfaces 205 of the fixed smoke guide 160, attached to the guiding surfaces 205 of the fixed smoke guide 160, formed as part of the guiding surfaces 205 of the fixed smoke guide 160 or any combination thereof. In the embodiment of Fig. 10b, the guiding surfaces 205 of the fixed smoke guide 160 are substantially clad with condensation arrangements 120. This is for exemplary purposes to show that any surface in a fluid path of the smoke 10 between the outlet 222 of the smoke canister 220 and the opening 212 of the housing 210 may be provided with a condensation arrangement 120. In some embodiments, some guiding surfaces 205 of the fixed smoke guide 160 are provided with condensation arrangements 120, in some embodiments, some guiding surfaces 205 of the fixed smoke guide 160 are partly provided with condensation arrangements 120.

[0084] It should be mentioned that, a guiding surface 205 in the present disclosure is to mean any surface configured to guide, direct, deflect or otherwise impinge the flow of smoke 10. Although the guiding surfaces 205 are described with reference to the fixed smoke guide 160 of Fig. 10b, e.g. the deflector assembly 100 and the nozzle 260 of Fig. 10a may be described as comprising guiding surfaces 205. That is to say, the guiding surfaces 205 and any associated condensation arrangements 120 are compatible with any embodiment of smoke generators 200 as presented herein. To this end, a smoke generator 200, which may be e.g. the smoke generator 200 described with reference to Fig. 10a or 10b may be described as comprising the housing 210 and the smoke canister 210 arranged as previously presented. Specifically, in this embodiment, the smoke generator comprises one or more guiding surface 205 configured to guide the smoke 10 along the extrusion axis E, and / or to deflect the smoke 10 away from the extrusion axis E. At least one of these guiding surfaces 205 is provided with a condensation arrangement 120, preferably a condensation arrangement 120 in the form of a mesh 120 as described elsewhere. The mesh 120 is comparably cheap, easily formed and may be arranged at any suitable guiding surface 205 with little impact on e.g. production complexity and cost and still provide significant reduction in soot, debris, liquid etc. spreading from the smoke generator 200 when generating smoke 10.

[0085] In Fig. 11, a schematic view of a control module 300 according to one embodiment is shown. The control module 300 may be fixed to the smoke generator 200, but in some embodiment, the control module 300 may be removably connected to (the housing 210 of) the smoke generator 200. In such embodiments, the control module 300 may comprises a control module housing 340. The control module housing 340 may comprise a control module interface 344 configured to be matingly connected to a control interface of the smoke generator 200. The control module housing 340 may comprise control module attachment means 348 configured to be matingly connected to attachment means of the smoke generator 200. One benefit of having the control module 300 removably connected to the smoke generator 200 is that it is commonplace that the smoke canister 220 is a single use device and by allowing easy removal of the control module 300, the control module 300 may be reused when replacing the smoke canister 220 and other components being darkened by the smoke e.g. the deflector assembly 100, the housing 210 etc.

[0086] The control module 300 may comprise a controller 310 configured to control the smoke generator 200 connected to the control module 300 via the control module interface 344. The controller 310 may be any suitable controller 310 (e.g. an MCU) operatively connected to or comprising a memory (not shown) for storing program instructions executable by the controller 310. The controller 310 is operatively connected to the control module interface 344 and is configured to communicate with a smoke generator 200 across the control module interface 344. The control module 300 may further comprise a transceiver 320. The transceiver 320 may be a dedicated module or comprised in the controller 310. The transceiver 320 may be configured to communicate with devices external to the smoke generator 200. Preferably, the transceiver 320 is a wireless transceiver operatively connected to one or more antenna elements (not shown). The antenna elements may be internal to, and comprised in the control module 300, and / or external to the control module and operatively connected thereto by e.g. SMA, SME, BNC connectors and / or coaxial cables or other connection means suitable for antenna connection. The transceiver 300 may be configured to operate at one or more industrial and scientific (ISM) frequency bands. Preferably, the transceiver 300 is configured to operate at frequencies below 1 GHz. The control module 300 may be configured to be powered from an external power source but in a preferred embodiment, the control module 300 comprises one or more battery connectors 330 for connection of one or more batteries.

[0087] In Fig. 12, an alarm system 1 comprising one or more smoke generators 200 according to the present disclosure is schematically illustrated. The alarm system 1 may be an alarm system 1 for a home or a business and configured to hamper activities of intruders and other villains. The alarm system 1 comprises an alarm gateway 2 (e.g. central unit, gateway, alarm switch, alarm panel) operatively connected to the one or more smoke generators 200 as disclosed herein, i.e. comprising a control module 300 as disclosed herein and at least one deflector assembly 100 as disclosed herein. The alarm system 1 may form a star network architecture (preferred), a mesh network architecture or a serial network architecture. The alarm system 1 may comprise one or more additional devices configured to detect, avert and / or alert events at the home or business where the alarm system 1 is configured to be installed. Such additional devices may comprise, but are not limited to, motion detectors (e.g. PIR-detectors, cameras etc.), contact detectors (e.g. detector switches for doors, windows etc.), sirens, light strobes, control devices (e.g. keypads etc.), monitoring devices etc. The alarm system 1 may further comprise one or more smart devices configured to control the home or business where the alarm system 1 is configured to be installed. Such smart devices may comprise, but are not limited to, mains switches controllable by the alarm gateway 2, doorbells, monitoring cameras and / or displays, configurable buttons, digital home assistants (e.g. Amazon Alexa, Google Home, Apple Siri etc.). The smart devices may additionally, or alternatively, be configured to control the alarm system 1. The alarm system 1 may be stand alone or may be operatively connected to an alarm receiving centre 3 or backend 3. The connection to the alarm receiving centre 3 may be wired via e.g. Ethernet, PSTN, ISDN etc. or wireless via a base station 4. The wireless connection may be any suitable mobile network (e.g. 2G, 3G, 4G, 5G etc.), LPWAN (LoRa, Sigfox etc.) or other wireless technologies.

[0088] Activation of the smoke generator 200, i.e. release of smoke 10, may be triggered by the alarm gateway 2 receiving an indication from one or more of the additional devices responsive to which, the alarm gateway 2 transmits an activation command to the smoke generator 200. The control module 300 of the smoke generator 200 receives the activation command and optionally transmits an acknowledgement to the gateway 2 to confirm reception. The control module 300 activates the control interface 344 to cause smoke 10 to be generated by the smoke canister 220. The smoke 10 will be emitted through the outlet(s) 222 of the smoke canister 220 to be deflected by the deflector assembly 100 (if arranged interior to the housing 210) and through the opening 212 of the housing 210 to be deflected by the deflector assembly 100 (if arranged exterior to the housing 210) in order to rapidly, efficiently and evenly fill the space where the smoke generator 200 is mounted with smoke 10.

[0089] In some embodiment, the initial indication from one or more of the additional devices is relayed to the alarm receiving centre 3 where authenticity is confirmed before an activation command for activation of the smoke generator 200 is transmitted from the alarm receiving centre 3 for relaying by the alarm gateway to the smoke generator 200. In some embodiment, the alarm receiving centre 3 is configured to cause activation of the smoke generator 200. In some embodiments, the alarm gateway 2 may be configured to relay substantially all alarm signals (triggering signals etc.) to the alarm receiving centre 3. In such embodiments, the alarm receiving centre 3 may be configured to, based on the received signals, cause activation of the smoke generator 200.

[0090] It should be mentioned that, in embodiments of the alarm system 1 comprising more than one smoke generator 200, not all smoke generator assemblies have to be activated at the same time. Each smoke generator 200 may be assigned a zone (location, limited geographical space, room, floor, etc.) and only activated if an alarm event is triggered by one or more other detectors located in the same zone, The decision to activate the smoke generator 200 may be taken by the smoke generator 200 itself (not preferred), by the alarm gateway 2, by the alarm receiving centre 3 or a combination of two or more of the three. It should be mentioned herein that all features and embodiments are compatible with each other unless stated otherwise. All of the features are usable in isolation without inclusion of other features unless stated otherwise.

[0091] Modifications and other variants of the described embodiments will come to mind to one skilled in the art having benefit of the teachings presented in the foregoing description and associated drawings. Therefore, it is to be understood that the embodiments are not limited to the specific example embodiments described in this disclosure and that modifications and other variants are intended to be included within the scope of this disclosure. Furthermore, although specific terms may be employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. Therefore, a person skilled in the art would recognize numerous variations to the described embodiments that would still fall within the scope of the appended claims. Furthermore, although individual features may be included in different claims (or embodiments), these may possibly advantageously be combined, and the inclusion of different claims (or embodiments) does not imply that a combination of features is not feasible and / or advantageous. In addition, singular references do not exclude a plurality. Finally, reference signs in the claims are provided merely as a clarifying example and should not be construed as limiting the scope of the claims in any way.

Claims

CLAIMS1. A smoke generator (200), comprising: a housing (210), a smoke canister (220) at least partly arranged inside the housing (210) and having one or more outlets (222) for emission of smoke (10) along an extrusion axis (E) of the smoke canister (220), the smoke (10) having a temperature that is higher than an ambient temperature, and at least one condensation arrangement (120), comprising one or more condensation sections (125) arranged to collect condensation (20) resulting from cooling of the smoke (10) emitted from the smoke canister (220).

2. The smoke generator (200) of claim 1, further comprising at least one deflector assembly (100) comprising: a body (110) having a first surface (115) configured to deflect the smoke (10) emitted from the smoke canister (220), and a condensation arrangement (120) arranged to collect condensation (20) resulting from the smoke (10) impinging on the first surface (115) of the body (110).

3. The smoke generator (200) of claim 2, wherein at least one condensation arrangement (120) is arranged in a fluid path of the smoke (10) between the outlets (222) of the smoke canister (220) and of the deflector assembly (100).

4. The smoke generator (200) of claim 2 or 3, wherein at least one condensation arrangement (120) forms part of a nozzle (260) of the smoke generator (200).

5. The smoke generator (200) of any of claims 2 to 4, wherein at least one deflector assembly (100) is arranged to distribute the flow of smoke (10) about a distribution axis (D) that is different from the extrusion axis (E) of the smoke canister (220).

6. The smoke generator (200) of any of claims 2 to 5, wherein at least one deflector assembly (100) is pivotably coupled to a housing (210) of the smoke generator (200).

7. The smoke generator (200) of any of claims 2 to 6, wherein at least a part of at least one condensation arrangement (120) is spaced from the first surface (115) of the body (HO).

8. The smoke generator (200) of any of claims 2 to 7, wherein at least a part of at least one condensation arrangement (120) is positioned adjacent to, optionally in contact with, the first surface (115) of the body (110).

9. The smoke generator (200) of any one of claims 2 to 8, wherein at least one deflector arrangement (100) comprises a condensation arrangement (120) that is part of the body (110) of the deflector arrangement (100).

10. The smoke generator (200) of any one of the preceding claims, wherein at least one condensation arrangement (120) is a part of the housing (210) of the smoke generator (200).

11. The smoke generator (200) of any of the preceding claims, wherein at least one condensation arrangement (120) comprises a mesh.

12. The smoke generator (200) of claim 11, wherein a plurality of condensation sections (125) are formed by openings of the mesh.

13. A smoke generator (200), comprising: a housing (210), a smoke canister (220) at least partly arranged inside the housing (210) and having one or more outlets (222) for emission of smoke (10) along an extrusion axis (E) of the smoke canister (220), the smoke (10) having a temperature that is higher than an ambient temperature, a guiding surface configured to guide the smoke (10) emitted by the smoke canister, and a mesh (120) arranged adjacent to at least a part of the guiding surface.

14. The smoke generator (200) of claim 13, wherein the mesh (120) is disposed along at least a part of the guiding surface.The smoke generator (200) of claim 13 or 14, wherein the mesh (120) is a part of the guiding surface. The smoke generator (200) of claim 13, 14 or 15, wherein the mesh (120) is spaced from the guiding surface. The smoke generator (200) of any of claims 13 to 16, comprising first and second mesh bodies at least partly overlapping each other, optionally, fastened to each other in fixed relation. The smoke generator (200) of any of claims 13 to 17, wherein the mesh is of, or comprises, metal. The smoke generator (200) of any of claims 13 to 18, wherein the guiding surface forms at least part of a deflector for deflecting the smoke emitted from the canister, from the extrusion axis (E) to a deflection axis. The smoke generator (200) of any of claims 13 to 19, wherein the guiding surface is configured to guide the smoke generally along the extrusion axis. A smoke generator (200), comprising: a housing (210), a smoke canister (220) at least partly arranged inside the housing (210) and having one or more outlets (222) for emission of smoke (10) along an extrusion axis (E) of the smoke canister (220), the smoke (10) having a temperature that is higher than an ambient temperature, a deflector assembly (100) comprising: a body (110) comprising a first surface (115) configured to deflect a flow of smoke (10), and a condensation arrangement (120) comprising one or more condensation sections (125) arranged to collect condensation (20) resulting from the flow of smoke (10) impinging on the first surface (115) of the body (110); wherein the condensation arrangement (120) is arranged to impinge the flow of smoke (10) before, and / or at a same time, as the flow of smoke (10) impinges on the first surface (115) of the body (110).

22. The smoke generator (200) of claim 21, wherein one or more of the condensation sections (125) are provided between two or more first elongate members (122) of the condensation arrangement (120).

23. The smoke generator (200) of claim 22, wherein the first elongate members (122) are substantially parallel.

24. The smoke generator (200) of claim 22 or 23, further comprising a plurality of second elongate members (124) intersecting one or more of the first elongate members (122) providing one or more condensation sections (125) between the second elongate members (124) and the one or more of the first elongate members (122).

25. The smoke generator (200) of claim 24, wherein the second elongate members (124) are substantially parallel.

26. The smoke generator (200) of any of claims 21 to 25, wherein the condensation arrangement (120) comprises a mesh and a plurality of condensation sections (125) are formed by openings of the mesh.

27. The smoke generator (200) of any of claims 21 to 26, wherein at least a part of the condensation arrangement (120) is spaced from the first surface (115) of the body (HO).

28. The smoke generator (200) of claim 27, wherein the separation distance (d) is in the range of 0,01 to 1 mm, preferably between 0,01 to 0,5 mm.

29. The smoke generator (200) of any of claims 21 to 26, wherein the condensation arrangement (120) is a part of the body (110).

30. The smoke generator (200) of claim 29, wherein one or more of the condensation sections (125) are dimples (125) provided in the first surface (115) of the body (110).

31. The smoke generator (200) of any preceding claim , further comprising a control module (300) configured to control activation of the smoke generator (200), wherein the control module (300) comprises a transceiver module (320) configured for receivingcontrol instructions from an alarm system (1), preferably, the transceiver module (320) is a wireless transceiver module (320). An alarm system (1), comprising an alarm gateway (2) configured to communicate operatively with the smoke generator (200) of any preceding claim, and configured to provide control instructions to the smoke generator (200). The alarm system (1) of claim 32, wherein the alarm gateway is configured for operative communication with an alarm receiving centre (30). The alarm system (1) of claim 33, further comprising the alarm receiving centre (30), wherein the alarm receiving centre (30) is configured to cause activation of the smoke generator (200). The alarm system (1) of claim 33 or 34, wherein the alarm gateway (2) is configured to activate the smoke generator (200) only upon receiving an activation signal from the alarm receiving centre (30).

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