Fire extinguishing system for a roof with a solar panel system

Description

[0001] The invention relates to a fire extinguishing system for a roof with a solar power system.

[0002] The invention further relates to a solar power system with the fire extinguishing system and at least one solar panel.

[0003] US 7,909,111 B1 discloses a fire protection system with individual groups of water outlets on a roof structure of a building, wherein a group of water outlets covering an area where a temperature increase above a threshold is detected can discharge extinguishing agent without the other groups of water outlets discharging water. WO 02 / 00303 A1 discloses a fire-resistant supporting structure with a plurality of spray nozzles, wherein the edge regions of discharge cones of adjacent spray nozzles interpenetrate each other. WO 2005 / 042105 A2 discloses a fire protection system in which foam is used as an extinguishing agent. DE 10 2010 050 589 A1 discloses a device for fire protection of a roof-mounted solar collector system, consisting of several solar modules and a fire protection device arranged below the solar modules.

[0004] Extinguishing a fire on a roof with a solar power system is often problematic, as winds on the roof can make firefighting more difficult and a relatively large amount of extinguishing agent can potentially enter the building from above.

[0005] It is therefore an object of the present invention to provide a fire extinguishing system that enables improved extinguishing of a fire on a roof with a solar power system.

[0006] The problem is solved by a fire extinguishing system for a roof with a solar power system, according to independent claims 1 and 3.

[0007] The winds expected on the roof can cause the detection point—that is, the location where the fire was detected—to differ from the actual fire location. For example, if the detection device uses a heat detector, the wind can alter the detection point due to changes in convection currents. Even with other types of detectors, wind can lead to a shift in the detection point compared to the actual fire location. For instance, if a smoke detector is used, drifting smoke can result in such a shift in the detection point. When using a radiation-based detector, such as an IR and / or UV detector, wind can cause flame distortion and thus a shift in the detection point.

[0008] The detection point being shifted compared to the actual fire location can, in principle, lead to the activation of a fire suppression zone that covers the detection point but not the actual fire location. This problem occurs particularly in border areas of fire groups where different fire suppression zones adjoin each other. To counteract this problem, the fire suppression zones overlap.

[0009] Since the groups of extinguishing agent outlets can be addressed separately, it is possible to extinguish fires independently in each extinguishing zone. Therefore, it is not necessary to apply extinguishing agent to the entire roof, thus reducing the risk of extinguishing agent entering the building. The extinguishing agent can, for example, be applied only in one or several specific extinguishing zones.

[0010] The extinguishing zones can also be considered as grouped effective areas. These extinguishing zones or grouped effective areas can be formed, for example, by: i) arranging a first set of extinguishing agent outlets with nozzles for dispensing the extinguishing agent in a first extinguishing zone and connecting them via a first pipe system; ii) arranging a second set of extinguishing agent outlets with nozzles for dispensing the extinguishing agent in a second extinguishing zone and connecting them via a second pipe system; iii) arranging a third set of extinguishing agent outlets with nozzles for dispensing the extinguishing agent in a third extinguishing zone and connecting them via a third pipe system; and so on. The extinguishing system is preferably designed such that the extinguishing agent is dispensed simultaneously, at least through extinguishing agent outlets of the same group.The extinguishing areas, i.e. the group effective areas, preferably extend over at least 50 m².

[0011] The roof is preferably a flat roof. Therefore, the roof preferably has a pitch of less than 10°.

[0012] It is also preferred that each extinguishing zone is assigned a pipe system for guiding the extinguishing agent to the respective extinguishing agent outlets, wherein the pipe system of one extinguishing zone is designed such that the extinguishing agent outlets are arranged along at least one line running in a guidance direction, wherein the pipe system of another extinguishing zone is also designed such that extinguishing agent outlets are arranged along at least one line running in the guidance direction, and wherein the extinguishing zones overlap in the guidance direction.

[0013] Solar panels are often arranged in rows on a roof. In such cases, it is advantageous to install the fire suppression system together with the solar array on the roof in such a way that the rows of solar panels are also aligned in the guidance direction. Particularly when solar panels are arranged along a specific direction, referred to here as the guidance direction, it can be assumed that winds on the roof will generally also be guided, at least partially, along this direction. The undesirable effect caused by wind—the deviation of the detection point from the actual fire location—then occurs most likely and most strongly in this guidance direction. To counteract this effect, the overlap of the extinguishing zones is therefore preferably achieved, at least in this guidance direction. In a preferred embodiment, the overlap area in the guidance direction has a length of at least 2 m, and more preferably at least 3 m.

[0014] Overlapping extinguishing zones are preferably arranged side by side in the direction of guidance, wherein the extinguishing agent outlets of different groups, which are assigned to the overlapping extinguishing zones, are preferably arranged along lines that are offset from each other perpendicular to the direction of guidance. A first set of lines of a first group of extinguishing agent outlets, which are assigned to a first extinguishing zone, and a second set of lines of a second group of extinguishing agent outlets, which are assigned to a second extinguishing zone that overlaps with the first extinguishing zone, preferably interlock.In other words, of the extinguishing agent outlets of the first group, at least those extinguishing agent outlets that are located furthest towards the second group are located a) in the same position, with respect to the direction of guidance, as those extinguishing agent outlets of the second group of extinguishing agent outlets that are located furthest towards the first group, or b) in a position, with respect to the direction of guidance, that is shifted even further towards the second group.

[0015] It is also preferred that the fire extinguishing system includes a control unit configured to control the extinguishing device depending on the detection location. The control unit is specifically configured to determine the extinguishing zone in which the detection location is situated and to control the extinguishing device so that the extinguishing agent is dispensed in that specific extinguishing zone. If the detection location is situated in an overlapping area where extinguishing zones overlap, these overlapping extinguishing zones are determined, and the extinguishing agent is dispensed in these zones. Alternatively, one or more detection locations may be detected in a non-overlapping part of an extinguishing zone. In this case, that extinguishing zone is determined, and the extinguishing agent is dispensed only in that zone.The control system is preferably designed to control the extinguishing device in such a way that, if several extinguishing zones have been defined, the extinguishing agent is applied simultaneously in all defined extinguishing zones.

[0016] The detection device can be configured to detect a fire using radiant heat and / or convective heat transfer. The detection device preferably comprises several detectors arranged at different detection locations, each assigned to a specific extinguishing zone and, in the overlapping area, to multiple extinguishing zones. These assignments are known to the control system. The assignments can be stored, for example, in the control system or in a separate memory to which the control system is connected. Based on these assignments, the control system can immediately recognize in which extinguishing zone a detection location has been detected and directly activate the extinguishing zones designated for extinguishing.

[0017] In one embodiment, the controller also knows which detector is located at which detector position. The locations of the extinguishing zones can also be known to the controller in another embodiment. This information can be entered into the controller or into a memory connected to the controller, for example, during the installation of the fire extinguishing system. The controller can then be configured to use this location information to determine which extinguishing zones to activate.

[0018] The extinguishing agent outlets comprise extinguishing nozzles that alternately point in opposite directions and have a horizontal spray angle of less than 360°. It is preferred that the horizontal spray angle be less than or equal to 270°, and it is particularly preferred that the horizontal spray angle be less than or equal to 180°. If extinguishing nozzles with a horizontal spray angle of 360° were used, there would be no alternating spray directions between adjacent extinguishing nozzles. These extinguishing nozzles with a 360° spray characteristic generally have a shorter range at the same pressure than two alternately arranged extinguishing nozzles with a horizontal spray angle of less than, for example, 180°, which could ultimately increase the required number of pipes per extinguishing area.The alternating use of extinguishing nozzles with a horizontal beam angle of less than 360° therefore enables a large-area deployment of extinguishing nozzles with relatively few pipes.

[0019] The extinguishing agent outlets preferably comprise nozzles with a flat spray cone to achieve the fastest possible uniform coverage of the roof with the extinguishing agent. A spray cone is considered flat, in particular, if the vertical spray angle is smaller than the horizontal spray angle. In a preferred embodiment, the horizontal spray angle is equal to twice the vertical spray angle. Here, too, it is particularly preferred that the horizontal spray angle is less than or equal to 180°.

[0020] The spray angle here refers to the opening angle of the spray pattern, where vertical and horizontal are relative to the roof surface. For opening angles smaller than 180°, the spray pattern is a cone.

[0021] It is further preferred that the detection device comprises several detectors for detecting the location where a fire has occurred or is likely to occur, with the detectors arranged along straight lines. The detectors along the straight lines preferably form heat detectors, i.e., linear heat detectors, which are preferably resettable. The detectors are thus preferably heat detectors, whereby a fire or the probable occurrence of a fire at a detector location, and thus the detection location, can be determined based on a heat measurement. For example, a detection location can be identified when the measured heat and / or a measured heat gradient at that location has exceeded a predetermined limit.Preferably, the detector measures heat based on a temperature measurement, so that a detection location can be identified if the measured temperature and / or a temperature gradient at that location exceeds a threshold value. Other detectors can also be used. For example, the detectors can be designed as smoke detectors, preferably as linear smoke detectors or as aspirating smoke detectors.

[0022] In a preferred embodiment, the detectors are arranged along straight lines running in the guidance direction. As explained above, the undesirable effect of wind-induced deviation of the detection point from the actual fire location is most likely and most pronounced in this guidance direction. Therefore, the most accurate possible fire detection in this guidance direction can further improve the fire suppression system.

[0023] The extinguishing system can be designed to use either water or extinguishing foam as the extinguishing agent. When using extinguishing foam, the agent penetrates the roof less or not at all, thus reducing damage caused by firefighting. Using water as the extinguishing agent allows for a technically simpler design of the extinguishing system. When water is used as the extinguishing agent, the extinguishing system preferably comprises a pipe system and a water valve, the pipe system being designed to supply water from the water valve to the extinguishing agent outlets.

[0024] When extinguishing foam is used as the extinguishing agent, the extinguishing device preferably comprises a pipe system, a water valve, and a foam generator for producing extinguishing foam. The pipe system is configured to supply water from the water valve to the foam generator and extinguishing foam from the foam generator to the extinguishing agent outlets. The foam generator draws in air to produce the extinguishing foam and can generate it with a relatively low expansion ratio, so that extinguishing foam with this relatively low expansion ratio is transported from the foam generator to the extinguishing agent outlets. For example, a foam generator known under the product name "Viking Foam Generator" can be used. The foaming agent can be, for example, a synthetic surfactant foaming agent or a protein foaming agent. However, other foam generators and / or other foaming agents can also be used.The water valve is preferably a deluge valve. Examples of deluge valves that can be used include "Minimax FSX", "Viking Model E-1", "Viking Model E-3", "Viking Model H-1", "Viking Model H-3", or other deluge valves. The "Minimax FSX", "Viking Model H-1", and "Viking Model H-3" deluge valves are electrically resettable. The "Viking Model E-1" and "Viking Model E-3" deluge valves are electrically actuated. The deluge valve includes a release mechanism, which can be, for example, pneumatic, electric, or hydraulic. In a preferred embodiment, a solenoid valve is used for the electrical release of the deluge valve. This enables particularly reliable release.

[0025] The extinguishing agent outlets can be designed to also contribute to foam generation. The extinguishing foam can therefore be generated in two stages: in the first stage, extinguishing foam is generated by the foam generator in the pipe system, and in the second stage, it is further generated by, for example, extinguishing nozzles. The extinguishing nozzles contribute to foam generation without external energy. Preferably, a minimum degree of foaming is generated in the first stage, dimensioned so that the extinguishing foam can hardly penetrate the roof, especially the roof membrane, into a building simply due to this minimum foaming. The foaming requirement for the extinguishing nozzles can then be relatively low. In principle, the fire extinguishing system is preferably designed so that the degree of foaming is not so high that the wind carries away the relatively light foam.

[0026] In a preferred embodiment, the extinguishing foam ultimately applied as an extinguishing agent is heavy foam with an expansion ratio between 4 and 20 (inclusive), or medium foam with an expansion ratio between 21 and 200. In a particularly preferred embodiment, the applied extinguishing agent is heavy foam with an expansion ratio of 6. The expansion ratio is the ratio between the volume of the final applied extinguishing foam and the volume of the water-foam concentrate mixture used. The heavy and medium foams used have the advantage that, compared to light foams, they are not as easily blown away, which is particularly important when extinguishing a fire on a roof.

[0027] The extinguishing agent outlets preferably comprise extinguishing nozzles. These nozzles can be, for example, the extinguishing nozzles with the product designation "Viking Model C-1 Window Sprinkler". The extinguishing nozzles can also be so-called "aspirating sprinklers", in which case an additional foam generator can preferably be omitted. The extinguishing nozzles can also have a foam generation attachment.

[0028] In one embodiment, the distance between two adjacent extinguishing agent outlets of the same group is a maximum of 160 cm. In another embodiment, however, this distance can be greater.

[0029] The above-mentioned task is also solved by a fire extinguishing system for a roof with a solar power system, which features: A fire extinguishing device with multiple groups of extinguishing agent outlets for distributing an extinguishing agent on the roof, wherein each group of extinguishing agent outlets is assigned to a spatial extinguishing zone, wherein the fire extinguishing device is designed such that extinguishing agent can be discharged via extinguishing agent outlets of one group independently of the discharge of the extinguishing agent via extinguishing agent outlets of another group, a detection device designed to detect as a detection location a location where a fire has occurred or is likely to occur, and a control system designed to control the fire extinguishing device depending on the detection location, wherein, if the detection location is in a predefined boundary area that includes at least two adjacent sub-areas of different extinguishing zones, the extinguishing agent is discharged in the extinguishing zones whose sub-areas are encompassed by the boundary area.

[0030] As explained above, a detection point that is displaced compared to the actual fire location could, in principle, lead to the activation of a fire suppression zone that covers the detection point but not the actual fire location. As also explained above, this problem occurs particularly in boundary areas of fire suppression zones where different zones adjoin each other. To counteract this problem, fire suppression zones can overlap, but it is also possible to define a boundary zone that includes at least two adjacent sub-zones of different fire suppression zones and to apply the extinguishing agent in the fire suppression zones whose sub-zones are encompassed by the boundary zone, provided the detection point is located within the defined boundary zone.In other words, if the detection point is located within a first extinguishing zone and the actual fire location is in an adjacent second extinguishing zone, both extinguishing zones are still activated. This prevents the wind-induced shift of the detection point relative to the actual fire location from triggering only the incorrect first extinguishing zone and thus preventing any extinguishing. Put another way, if a detection point located within a extinguishing zone is also within a certain distance of an adjacent extinguishing zone, both extinguishing zones are activated. With this type of boundary zone design, overlapping boundaries are unnecessary. The individual extinguishing zones can therefore be exclusively adjacent to one another.

[0031] Since the control system uses the predefined limit range to control the extinguishing device, this limit range is stored within the control system. Therefore, the limit range is preferably not defined by physical, actually existing boundary features, but rather it is a virtual limit range that is digitally stored in the control system.

[0032] In a preferred embodiment, the controller is designed such that a user, such as an installer, can modify the limit. For this purpose, the controller itself can have an input device, such as a keypad. Alternatively or additionally, the controller can be designed to allow modification of the limit via a data connection, which is particularly wireless. For example, a mobile input unit can be connected to the controller via a data connection to enable a change in the limit. The mobile input unit can be, for example, a mobile computer with input devices such as a smartphone.

[0033] The boundary area can form a rectangle, particularly if the extinguishing agent outlets have a horizontal 360° dispersion pattern. The sides of the boundary area that run parallel to the boundary between the extinguishing zones for which the boundary area is defined can therefore each be a straight line. However, the boundary area can also have a different shape. For example, the sides of the boundary area that run parallel to the boundary between the extinguishing zones for which the boundary area is defined can each form a rectangular curve. This can be the case, in particular, if the extinguishing agent outlets radiate at an angle that is horizontally less than 360° and, in particular, equal to 180°, and the extinguishing agent from adjacent extinguishing agent outlets is discharged in opposite directions when projected onto a horizontal plane.

[0034] The terms "horizontal beam angle," "projected onto a horizontal plane, opposite directions," etc., do not mean that the extinguishing agent is dispensed in a precisely horizontal direction, but rather refer only to directional and angular information projected onto an imaginary horizontal plane, or, in other words, to directional and angular information relating to a view "from above." The term "horizontal" is preferably understood relative to the roof surface. A horizontal plane is therefore a plane that runs parallel to a roof surface. The term "from above" then refers to a view perpendicular to the roof surface.

[0035] In one embodiment, the ends of the pipes of different, adjacent extinguishing zones are positioned opposite each other such that the adjacent, closing extinguishing nozzles of the different extinguishing zones point in opposite directions when viewed from above. This is preferred because otherwise a "blind spot" could occur directly on the back side of the adjacent, closing extinguishing nozzles, i.e., an area where no extinguishing agent is dispensed.

[0036] It is preferred that each extinguishing zone is assigned a pipe system for guiding the extinguishing agent to the respective extinguishing agent outlets, wherein the pipe system of one extinguishing zone is designed such that the extinguishing agent outlets are arranged along at least one line running in a guidance direction, wherein the pipe system of another extinguishing zone is also designed such that extinguishing agent outlets are arranged along at least one line running in the guidance direction, wherein the boundary area is defined such that it covers a boundary line between adjacent extinguishing zones that runs perpendicular to the guidance direction.

[0037] As described above, solar panels are often arranged in rows on a roof. In such cases, it is advantageous to install the fire suppression system together with the solar array on the roof in such a way that the rows of solar panels are also aligned in the guidance direction. In particular, when solar panels are arranged along a specific direction, referred to here as the guidance direction, it can be assumed, as also described above, that winds on the roof will generally be guided, at least in part, along this guidance direction. The undesirable effect caused by wind, namely the deviation of the detection point from the actual fire location, then occurs most likely and most strongly in this guidance direction. To counteract this effect, the boundary zone is preferably defined such that it covers a boundary between adjacent extinguishing zones that runs perpendicular to the guidance direction.

[0038] The width of the boundary zone in the direction of travel is preferably large enough that the detection device can detect different locations where fires could occur, both in the direction of travel and within the boundary zone. That is, although the location can be detected accurately, the boundary zone is relatively wide to counteract the wind influences described above.

[0039] The above-mentioned task is also solved by a fire extinguishing system for a roof with a solar power system, which features: A fire extinguishing device comprising a group of extinguishing agent outlets for applying an extinguishing agent to the roof, wherein the extinguishing agent outlets comprise extinguishing nozzles which alternately direct extinguishing agent in opposite directions into a coverage area and have a horizontal beam angle of less than 360°, wherein the coverage areas of adjacent extinguishing nozzles of the group overlap, and a detection device configured to detect as a detection location a place where a fire has occurred or is likely to occur.

[0040] The overlapping coverage areas of adjacent extinguishing nozzles in the group also lead to improved fire suppression on a roof with a solar array. Furthermore, the alternating use of extinguishing nozzles with a horizontal beam angle of less than 360° allows for large-area coverage with relatively few pipes, as already explained above. Preferably, the horizontal beam angle is less than or equal to 270°. It is particularly preferred that the horizontal beam angle is less than or equal to 180°.

[0041] The detection device for this fire extinguishing system can also be designed to detect a fire using radiant heat and / or convective heat transfer. Furthermore, this fire extinguishing system can also include a control unit designed to regulate the extinguishing device based on a detection location. This fire extinguishing system can also incorporate other features of the detection device and the control unit described above.

[0042] This fire extinguishing system can have one or more groups of extinguishing agent outlets. In one embodiment, the extinguishing device comprises several groups of extinguishing agent outlets for distributing an extinguishing agent on the roof, wherein the extinguishing device is designed such that a) the extinguishing agent can be discharged via extinguishing agent outlets of one group independently of any discharge of the extinguishing agent via extinguishing agent outlets of another group, and b) the extinguishing agent can be discharged via extinguishing agent outlets of the other group dependent on any discharge of the extinguishing agent via extinguishing agent outlets of the first group. In this embodiment, it is not necessary to supply each group of extinguishing agent outlets separately and completely independently of other groups of extinguishing agent outlets with extinguishing agent, which can lead to a simplified design of the extinguishing device.For example, the extinguishing system can have a pipe system with extinguishing agent outlets of groups, wherein, for instance, a first section of the pipe system has a first group of extinguishing agent outlets and a second section of the pipe system has a second group of extinguishing agent outlets. The extinguishing system can then further be designed such that the extinguishing agent is supplied to the first section of the pipe system and can also be supplied to the second section of the pipe system above this first section, with a controllable valve located between the first and second sections of the pipe system. When the extinguishing agent is supplied to the first section of the pipe system and the controllable valve is closed, the extinguishing agent only exits from extinguishing agent outlets of the first group.When the extinguishing agent is supplied to the first section of the pipe system and the controllable valve is open, the extinguishing agent is also discharged via the extinguishing agent outlets of the second section of the pipe system.

[0043] In a further embodiment, the extinguishing device is designed such that a) the extinguishing agent can be dispensed via extinguishing agent outlets of one group independently of the dispensing of the extinguishing agent via extinguishing agent outlets of another group, and b) the extinguishing agent can be dispensed via extinguishing agent outlets of the other group independently of the dispensing of the extinguishing agent via extinguishing agent outlets of one group. This allows for a more targeted application of the extinguishing agent and can therefore lead to a smaller quantity of extinguishing agent required for fire extinguishing, which in turn can reduce potential damage caused by the extinguishing agent.

[0044] The extinguishing system can be designed so that each extinguishing agent outlet delivers the extinguishing agent into a specific coverage area, with the overlap area of ​​coverage areas between two adjacent extinguishing agent outlets of the same group being smaller than the overlap area of ​​coverage areas between adjacent extinguishing agent outlets of different groups. This allows for further improved fire suppression on a roof with a solar power system.

[0045] The comparison of the overlap areas preferably refers to a projection of the coverage areas onto a horizontal plane. In other words, it preferably refers to a dimension of the coverage areas and overlap areas viewed "from above." The "horizontal" plane is preferably a plane, as described above, that runs parallel to the roof surface. If the overlap area of ​​the coverage areas of two adjacent extinguishing agent outlets of the same group is not constant for different adjacent extinguishing agent outlets, the comparison preferably refers to an arithmetic mean or the largest overlap area of ​​two adjacent extinguishing agent outlets of the same group.The overlap area of ​​coverage areas of adjacent extinguishing agent outlets of different groups is preferably an arithmetic mean of overlap areas of coverage areas of adjacent extinguishing agent outlets of different groups or the maximum overlap area of ​​coverage areas of adjacent extinguishing agent outlets of different groups, if these overlap areas of coverage areas of adjacent extinguishing agent outlets of different groups are not all the same.

[0046] The term "adjacent extinguishing agent outlets" preferably refers to a neighborhood in the direction of a respective pipeline on which the respective extinguishing agent outlets are located. The pipelines are, in turn, preferably oriented in the direction of the aforementioned guide direction, so that the term "adjacent extinguishing agent outlets" preferably refers to a neighborhood in the guide direction.

[0047] In a preferred embodiment, the overlap area of ​​cover areas of adjacent extinguishing agent outlets of different groups is at least twice as large as the overlap area of ​​cover areas of two adjacent extinguishing agent outlets of the same group.

[0048] The invention further relates to a solar power system for a roof, wherein the solar power system comprises the fire extinguishing system and at least one solar panel. Preferably, the solar power system comprises several solar panels arranged side by side in the guide direction.

[0049] It is preferred that the detection device comprises several detectors for detecting the detection location, wherein the detectors are attached to the solar panel such that, after installation on the roof, they are positioned below the solar panel. In particular, the solar panel is positioned at an angle on the roof such that it has an upper side and an opposite lower side, with the detectors located below the solar panel in the region of the upper side. This protects the detectors from excessive sunlight, thereby increasing their service life and reducing the probability of false fire detection caused by sunlight.

[0050] The extinguishing device is preferably designed such that, after the solar power system is installed on the roof, the extinguishing agent outlets are positioned below the solar panel to allow the extinguishing agent to be discharged into an area below the solar panel. The extinguishing agent outlets preferably have nozzles that spray the extinguishing agent into the area below the solar panel. If the solar panel is mounted at an angle on the roof, as described above, the distance between the extinguishing agent outlets and the roof preferably corresponds to two-thirds of the distance between the top of the solar panel and the roof. In particular, the distance between the extinguishing agent outlets corresponds to two-thirds of the distance between a lower edge of the top of the solar panel and the roof.

[0051] In the following, embodiments of the invention are described with reference to the following figures, wherein Fig. 1 schematically and exemplarily illustrates components of a solar power system for a roof with a fire extinguishing system and several solar panels in a first view; Fig. 2 a second schematic and exemplary view of the components shown in the diagram. Fig. 1 The illustrated components are shown in Fig. 3, a third schematic and exemplary view of the components shown in Fig. 1Fig. 4 schematically and exemplarily illustrates further components of a solar power system with a fire extinguishing system, Fig. 5 schematically and exemplarily depicts overlapping extinguishing zones of a fire extinguishing system, Fig. 6 schematically and exemplarily depicts a boundary area between adjacent extinguishing zones, Fig. 7 schematically and exemplarily shows a specific arrangement of solar panels on a roof, Fig. 8 schematically and exemplarily illustrates components of an embodiment of a fire extinguishing system for a roof with a solar power system, and Fig. 9 schematically and exemplarily illustrates components of a further embodiment of a fire extinguishing system for a roof with a solar power system.

[0052] Fig. 1Figure 1 schematically and exemplarily illustrates components of a solar power system on a roof 1, wherein the solar power system comprises several solar panels 10 and a fire extinguishing system. In this embodiment, the solar panels 10 are arranged in two rows 3, 4 and mounted on a plate 2, which in turn is attached to the roof 1. The fire extinguishing system comprises an extinguishing device, of which in Fig. 1The diagram shows horizontally extending pipes 5 for supplying an extinguishing agent to the roof 1 and vertically extending pipes 6, at the ends of which extinguishing agent outlets with extinguishing agent nozzles are arranged. The extinguishing agent is thus conveyed via the horizontally extending pipes 5 and then via the vertically extending pipes 6 to the extinguishing agent outlets with the extinguishing agent nozzles, the extinguishing agent outlets at the ends of the vertical pipes 6 being arranged in two lines in this figure, which run in a so-called guide direction 21. The solar panels 10 and the horizontal pipes 5 are held by means of support struts 7.

[0053] Roof 1 is a flat roof, meaning a roof with a pitch of less than 10°.

[0054] Fig. 2 shows a schematic and exemplary top view of the in Fig. 1 components shown. In particular, it shows Fig. 2The extinguishing agent outlets 8, arranged in two lines, together with their respective cover areas 9. In this example, each extinguishing agent outlet 8 comprises a nozzle with a horizontal beam angle of 180°, wherein adjacent extinguishing agent outlets 8 along a pipe have nozzles that radiate in opposite directions when viewed from above. These directions, projected onto an imaginary horizontal plane, are perpendicular to the course of the horizontal pipes 5 and thus perpendicular to the guide direction 21.

[0055] Fig. 3 shows a schematic and exemplary side view of the [unclear text] in the Figures 1 and 2 components shown. As in Fig. 3As shown, the solar panels 10 are preferably arranged at an angle on the plate 2 by means of the support struts 7, each solar panel 10 having an upper side 44 and an opposite lower side 43 due to the angled position. The pipe system is installed such that the extinguishing agent outlets 8 with the extinguishing nozzles are arranged below the solar panels 10 so that the extinguishing agent can be applied to an area below the respective solar panel 10. The extinguishing nozzles thus spray the extinguishing agent into the area below the respective solar panel 10. In this example, the distance between the extinguishing agent outlets 8 and the plate 2 is two-thirds of the distance between the upper side 44 of the solar panel 10 and the plate 2. In particular, the distance of the extinguishing agent outlets 8 to the plate 2 is two-thirds of the distance between a lower edge of the upper side 44 of the solar panel 10 and the plate 2.In another embodiment, if the solar system is installed directly on the roof 1 without using the panel 2, the distance between the extinguishing agent outlets 8 and the roof 1 is in particular two-thirds of the distance between the upper side 44 of the solar panel 10, in particular the lower edge of the upper side 44 of the solar panel 10, and the roof 1.

[0056] In this embodiment, the distance x between opposing solar panels 10 of adjacent rows is a maximum of 80 cm, and the distance z between the lower edge of the upper side 44 of the respective solar panel 10 and the plate 2 is a maximum of 80 cm. These dimensions are only exemplary. In other embodiments, these maximum values ​​may be exceeded.

[0057] The fire extinguishing system also includes a detection device 11, which is configured to detect a location where a fire has occurred or is likely to occur. The detection device 11 comprises several detectors 12 for detecting the detection location, wherein the detection device 11 with the detectors 12 is attached to the respective solar panel 10 such that, after being mounted on the roof 1, the detection device 11 with the detectors 12 is positioned below the respective solar panel 10. In this embodiment, the detection device 11 with the detectors 12 is positioned below the solar panels 10 in the region of the respective upper side 44.By arranging the detection device 11 with the detectors 12 below the solar panels 10, the detection device is protected from excessive sunlight, thereby increasing the service life of the detectors and reducing the probability of a faulty fire detection caused by sunlight.

[0058] The Figures 1 to 3 As mentioned above, these figures illustrate only some components of the entire solar power system, including the fire suppression system and the solar panels. In this embodiment, the entire solar power system actually comprises six rows of solar panels 10, with the fire suppression system having two extinguishing zones, each with six horizontal pipes 5, 105, one of which is shown by way of example and schematically in Fig. 4 is depicted. In the Figures 1 to 3 Only a few components were illustrated for the purpose of clearer presentation.

[0059] The fire extinguishing system therefore comprises an extinguishing device with two groups of extinguishing agent outlets for applying an extinguishing agent to the roof 1, wherein a first group of extinguishing agent outlets 8 together with other elements of the extinguishing device and the fire extinguishing system in Fig. 4 shown.

[0060] The fire extinguishing system includes a control unit 15, which is designed to control the extinguishing device depending on the detection location. It is also in Fig. 4The diagram schematically illustrates that the detectors 12 of the detection device 11 are each arranged along straight lines extending in the guide direction 21. The detectors 12 of the detection device 11 thus run parallel to the horizontal pipes 5 and therefore to the extinguishing agent outlets 8. In this embodiment, the detection device 11 with the detectors 12 is a linear resettable heat detector. The detectors 11 are therefore preferably heat detectors, whereby a fire or a probable occurrence of a fire at a detector location, and thus the detection location, can be determined based on a heat measurement. For example, a detection location can be identified when the measured heat and / or a measured heat gradient at that location has exceeded a predetermined limit value.Preferably, the respective detector 12 measures heat based on a temperature measurement, so that a detection location can be identified if the measured temperature and / or a temperature gradient at that location exceeds a predetermined limit. Other detector types, such as smoke detectors, can also be used.

[0061] In this embodiment, the extinguishing device is designed to use extinguishing foam as the extinguishing agent. Among other advantages, extinguishing foam penetrates the roof 1 less or not at all, thus reducing damage caused by the extinguishing process. In another embodiment, however, a different extinguishing agent, such as water, can be used. In this embodiment, a heavy foam with an expansion ratio of 6 is used as the extinguishing foam. However, other heavy and medium foams can also be used. For example, a heavy foam with an expansion ratio between 4 and 20 (inclusive) or a medium foam with an expansion ratio between 21 and 200 (inclusive) can be used. Heavy and medium foams are preferred over light foams because they are less likely to be blown away by the wind.

[0062] The extinguishing device of the fire extinguishing system comprises a spray water valve 17 with a solenoid valve 19 as the triggering mechanism and a foam generator 20, which is connected to the spray water valve 17 via a pipe 14. The foam generator 20 is in turn connected to pipe 5 via a pipe 13. The control unit 15 is connected to the triggering mechanism 19 by means of a cable 18 and to the linear heat detector 11 by means of a further cable 16, so that the control unit 15 can control the triggering mechanism 19 depending on a detected fire.

[0063] For example, a foam generator known under the product name "Viking Foam Generator" can be used as foam generator 20. The foaming agent can be, for example, a synthetic surfactant foaming agent or a protein foaming agent.

[0064] However, other foam generators and / or other foaming agents can also be used.

[0065] The extinguishing agent outlets 8 can be designed to also contribute to foam generation. The extinguishing foam can therefore be generated in two stages: in the first stage, extinguishing foam is generated by the foam generator 20 in the pipe system, and in the second stage, it is further generated by extinguishing nozzles. The extinguishing nozzles can contribute to foam generation without external energy. Preferably, a minimum foam density is generated in the first stage, dimensioned such that the extinguishing foam can hardly penetrate the roof 1 into a building solely due to this minimum foam density. The foam density requirement for the extinguishing nozzles can then be relatively low. However, it is also possible that the extinguishing foam is generated, for example, only in one stage by the foam generator 20.

[0066] Fig. 4As described above, this shows one of the two extinguishing zones of the extinguishing device of the fire extinguishing system. The combination of both extinguishing zones is shown schematically and by way of example in Fig. 5 depicted.

[0067] As shown in this figure, the extinguishing device comprises two groups of extinguishing agent outlets 8, 108 for distributing the extinguishing agent on the roof 1, each group of extinguishing agent outlets 8, 108 being assigned to a spatial extinguishing area 22, 23. The extinguishing device is designed such that the extinguishing agent can be discharged via extinguishing agent outlets 8 of the first group independently of a discharge of the extinguishing agent via extinguishing agent outlets 108 of the second group, the two extinguishing areas 22, 23 overlapping in an overlap area 40.

[0068] The second extinguishing zone is similarly designed to the first extinguishing zone, which was described above with reference to the Figures 1 to 4has been described. In particular, the second extinguishing zone also includes horizontal pipes 105 and vertical pipes leading to the extinguishing agent outlets 108. The foam generation and control system for the second extinguishing zone can also be described as above with reference to Fig. 4 The described design is as follows. In particular, the two groups of extinguishing agent outlets 8 and 108 can be addressed separately, so that extinguishing in extinguishing zones 22 and 23 can be carried out independently of each other. It is therefore not necessary to always apply an extinguishing agent to the entire roof 1, which reduces the penetration of extinguishing agent into the building.

[0069] The extinguishing zones 22, 23 can be considered as group effective areas 22, 23, wherein i) the first group effective area or the first extinguishing zone 22 is formed by the extinguishing agent outlets 8 and ii) the second group effective area or the second extinguishing zone 23 is formed by the extinguishing agent outlets 108. The extinguishing device is designed such that the extinguishing agent is discharged simultaneously through extinguishing agent outlets of the same group. In this embodiment, the extinguishing zones or group effective areas 22, 23 each extend over at least 50 m².

[0070] As described above, the first extinguishing zone 22 is associated with a pipe system comprising horizontal and vertical pipes 5 and 6 for conveying the extinguishing agent to the extinguishing agent outlets 8. As also described above, this pipe system of the first extinguishing zone 22 is designed such that the extinguishing agent outlets 8 are arranged along straight lines extending in the guidance direction 21. The second extinguishing zone 23 comprises a corresponding pipe system with horizontal and vertical pipes for conveying the extinguishing agent to the respective extinguishing agent outlets 108. The pipe system of the second extinguishing zone 23 is also designed such that its extinguishing agent outlets 108 are arranged along lines extending in the guidance direction 21. The extinguishing zones 22 and 23 overlap in this guidance direction 21, forming the overlap zone 40.In this embodiment, the overlap area in the guide direction 21 preferably has a length of at least 2 m and more preferably of at least 3 m.

[0071] The overlapping extinguishing zones 22, 23 are arranged side by side in the guidance direction 21, with the extinguishing agent outlets 8, 108 of different groups, which are assigned to the overlapping extinguishing zones 22, 23, arranged along lines that are offset from each other perpendicular to the guidance direction 21. A first set of lines of the first group of extinguishing agent outlets 8, which are assigned to the first extinguishing zone 22, and a second set of lines of the second group of extinguishing agent outlets 108, which are assigned to the second extinguishing zone 23, which overlaps with the first extinguishing zone 22, interlock.In this embodiment, of the extinguishing agent outlets 8 of the first group, those extinguishing agent outlets that are arranged furthest towards the second group are arranged in the same position, with respect to the guide direction 21, as those extinguishing agent outlets of the second group of extinguishing agent outlets 108 that are arranged furthest towards the first group.

[0072] The control unit 15 is preferably designed to control not only the dispensing of the extinguishing agent for the first extinguishing area 22, but also the dispensing of the extinguishing agent for the second extinguishing area 23. In another embodiment, several control units may be present, which perform the corresponding controls of the extinguishing areas.

[0073] The control unit 15 is configured to determine, based on signals from the detection device 11, in which of the extinguishing zones 22, 23 the detection location is situated, and to control the extinguishing device so that the extinguishing agent is dispensed in the specified extinguishing zone. If the detection location is situated in the overlap zone 40 where extinguishing zones 22, 23 overlap, these overlapping extinguishing zones 22, 23 are determined, and the extinguishing agent is dispensed in both of these extinguishing zones 22, 23. It is also possible that one or more detection locations are determined in a non-overlapping part of an extinguishing zone. In this case, the extinguishing agent is dispensed only in that extinguishing zone.

[0074] Due to the arrangement of the rows of solar panels in the guidance direction 21, any winds present on the roof are generally guided, at least partially, along this guidance direction 21. For this reason, a deviation of the detection location from the actual fire location occurs, particularly in this guidance direction 21. To counteract this effect, the extinguishing zones 22 and 23 overlap in the guidance direction 21.

[0075] The extinguishing device is designed such that the extinguishing agent is dispensed simultaneously through extinguishing agent outlets of the same group. The control system is also preferably designed to control the extinguishing device such that the extinguishing agent is dispensed simultaneously in both extinguishing zones 22, 23 when the detection point is located in the overlap zone 40.

[0076] The detection device 11 can be configured to detect a fire by means of radiant heat and / or convective heat transfer. The detectors 12 of the detection device 11 are arranged at various detection locations and are each assigned to one extinguishing zone 22, 23, and in the overlap area 40 to both extinguishing zones 22, 23. In this embodiment, these assignments are known to the control unit 15. The assignments can be stored, for example, in the control unit 15 or in a separate memory to which the control unit 15 is connected. Based on the assignments, the control unit 15 can immediately recognize in which of the extinguishing zones 22, 23 a detection location has been detected and can immediately activate the extinguishing zone(s) designated for extinguishing.

[0077] In this embodiment, the extinguishing nozzles of the extinguishing agent outlets 8, 108 have a horizontal spray angle of 180°. However, extinguishing nozzles with a smaller or larger horizontal spray angle can also be used. For example, the extinguishing nozzles with the product name "Viking Model C-1 Window Sprinkler" are used. The extinguishing nozzles can also be so-called "aspirating sprinklers." Furthermore, in this embodiment, which refers to the Figures 1 to 5 As described, the distance between two adjacent extinguishing agent outlets 8, 108 of the same extinguishing group 22, 23 is a maximum of 160 cm. In another embodiment, however, this distance can also be greater.

[0078] As explained above, the winds expected on the roof can cause the detection point—that is, the location where the fire was detected—to not exactly correspond to the actual fire location. This shift in the detection point compared to the actual fire location could, in turn, lead to the activation of a fire suppression zone that covers the detection point but not the actual fire location. This problem occurs particularly in boundary areas between fire suppression zones. To counteract this problem, the zones overlap in the area described in the section on... Fig. 4 In the described embodiment, the deletion areas 22, 23 are located in the overlap area 40. However, it is also possible to address this problem if the deletion areas do not overlap. This will be discussed below with reference to Fig. 6 described.

[0079] In this embodiment, the fire extinguishing system for a roof with a solar array also comprises an extinguishing device with two groups of extinguishing agent outlets 8, 108 for distributing an extinguishing agent on the roof 1, each group of extinguishing agent outlets 8, 108 being assigned to a spatial extinguishing zone 24, 25. The extinguishing device is designed such that extinguishing agent can be dispensed via extinguishing agent outlets 8 of one group independently of the dispensing of extinguishing agent via extinguishing agent outlets 108 of another group. In this embodiment, the extinguishing zones 24, 25, which could also be considered as group effective areas, do not overlap. Furthermore, this embodiment also includes a detection device 11 with detectors 12, which is configured to detect a location where a fire has occurred or is likely to occur.Furthermore, in this embodiment, the fire extinguishing system also includes a control unit 15, which is configured to control the extinguishing devices depending on the detection location. However, in this embodiment, the control unit 15 is configured such that if the detection location is situated within a predefined boundary area 41, which comprises two adjacent sub-areas of different extinguishing zones 24, 25, extinguishing agent is discharged into both extinguishing zones 24, 25, whose sub-areas are encompassed by the boundary area 41.In other words, if the detection point is located in the first extinguishing zone 24 and within the boundary zone 41, and if the actual fire location is located in the adjacent second extinguishing zone 25, both extinguishing zones 24 and 25 will still be activated, so that the wind-induced shift of the detection point relative to the actual fire location does not lead to the sole activation of the incorrect, first extinguishing zone and thus to no extinguishing.

[0080] Apart from the lack of overlap and the changed control, this corresponds to the following with reference to Fig. 6 The described fire extinguishing system is the fire extinguishing system described above with reference to Fig. 5as described above. In particular, in this embodiment as well, each extinguishing zone 24, 25 is assigned a pipe system 5, 105 for guiding the extinguishing agent to the respective extinguishing agent outlets 8, 108, wherein the pipe system 5 of the first extinguishing zone 24 is configured such that the extinguishing agent outlets 8 are arranged along lines extending in the guidance direction 21, and wherein the pipe system 105 of the other extinguishing zone 25 is likewise configured such that the extinguishing agent outlets 108 are arranged along lines that also extend in the guidance direction 21. The boundary zone 41 is defined such that it covers a boundary line 42 between the adjacent extinguishing zones 24, 25, which extends perpendicular to the guidance direction 21.

[0081] The ends of pipes 5 and 105 from different adjacent extinguishing zones 24 and 25 are positioned such that the adjacent, terminal extinguishing nozzles 8 and 108 from different extinguishing zones 24 and 25 point in different directions. Since the adjacent, terminal extinguishing nozzles 8 and 108 from different adjacent extinguishing zones 24 and 25 point in different directions, in boundary zone 41, for example, an area directly above (top-down view) a pipe string is supplied by an extinguishing nozzle 8 from the first extinguishing zone 24, while directly below it is supplied by the extinguishing nozzle 108 from the adjacent second extinguishing zone 25. This is shown in Fig. 6 illustrated by the coverage areas 9, 109 of the extinguishing nozzles 8, 108 and the imaginary extinguishing line 45. For this reason, the in Fig. 6vertically arranged sides of the boundary area 41, that is, the sides of the boundary area 41 which run perpendicular to the tubes 5, 105, are formed as a rectangular curve.

[0082] Although in the described embodiments the extinguishing nozzles have a horizontal beam angle of 180°, the beam angle can also be larger or smaller.

[0083] Fig. 8Figure 1 schematically and exemplarily shows another fire extinguishing system for a roof with a solar array. The fire extinguishing system comprises an extinguishing device with a group of extinguishing agent outlets 8 for applying an extinguishing agent to the roof. The extinguishing agent outlets 8 comprise extinguishing nozzles that alternately direct extinguishing agent in opposite directions into a coverage area 9. The expression "alternately in opposite directions" means that, in the direction of travel 21, adjacent extinguishing nozzles 8 point in opposite directions, the opposite directions referring to the directions of the extinguishing nozzles 8 in a horizontal plane. The directions of adjacent extinguishing nozzles projected onto an imaginary horizontal plane therefore point in opposite directions. In other words, viewed from above, the directions of adjacent extinguishing nozzles 8 point in opposite directions.

[0084] The beam angle of these extinguishing nozzles 8 is less than 360° and, in this embodiment, is equal to 180°. Furthermore, the coverage area 9 of each extinguishing nozzle 8 is essentially semicircular in this embodiment, and this also refers to a projection of the coverage area onto a horizontal plane. In other embodiments, the coverage area may have a different shape.

[0085] The extinguishing agent outlets 8 are arranged on a pipe system 205, through which extinguishing agent is supplied to the extinguishing agent outlets 8, wherein the extinguishing agent outlets 8 are arranged on parallel pipes of the pipe system 205 that point in the guide direction 21. The extinguishing agent supply can be effected, for example, as described above with reference to Fig. 4 has been described.

[0086] In this embodiment, the extinguishing device comprises a further group of extinguishing agent outlets 108 for distributing the extinguishing agent on the roof, wherein the extinguishing agent outlets 108 also comprise extinguishing nozzles which alternately discharge extinguishing agent in opposite directions into a coverage area 109 and have a horizontal spray angle of less than 360°, which is also 180° for these extinguishing nozzles 108 in this example. This second group of extinguishing agent outlets 108 is supplied with the extinguishing agent by means of a pipe system 305. The supply of the second pipe system 305 with the extinguishing agent can also be carried out, for example, as above with reference to Fig. 4 described. In this embodiment, the pipe systems 205, 305 are completely separate, so that the first group of extinguishing nozzles 8 and the second group of extinguishing nozzles 108 can be supplied with extinguishing agent completely independently of each other.

[0087] In this embodiment, the extinguishing device is designed such that an overlap area 230 of coverage areas 9 of two adjacent extinguishing agent outlets 8 of the same group is smaller than an overlap area 231 of coverage areas 9, 109 of adjacent extinguishing agent outlets of different groups. In particular, in this embodiment, the coverage area of ​​adjacent extinguishing agent outlets of different groups is more than twice as large as the overlap area 230 of coverage areas 9 of two adjacent extinguishing agent outlets 8 of the same group. The dimensions and sizes here preferably refer to a projection of the overlap areas and coverage areas onto an imaginary horizontal plane. A top-down view is thus assumed.

[0088] Another embodiment of a fire extinguishing system for a roof with a solar power system is shown by way of example and schematically in Fig. 9shown. In this embodiment, the fire extinguishing system also includes an extinguishing device with a first group of extinguishing agent outlets 8 for distributing an extinguishing agent on the roof and a second group of extinguishing agent outlets 108 for distributing the extinguishing agent on the roof, wherein the first group of extinguishing agent outlets 8 and the second group of extinguishing agent outlets 108 are assigned to different extinguishing zones. The extinguishing agent outlets 8, 108 comprise extinguishing nozzles that alternately discharge extinguishing agent in opposite directions into a coverage area 9, 109 and have a horizontal spray angle of less than 360°. In this embodiment, the horizontal spray angle is 180°. The coverage areas 9, 109 of adjacent extinguishing nozzles 8, 108 of the same group overlap in a respective overlap area 230. Similar to the one shown in Fig. 8In the embodiment shown, an overlap area 230 of cover areas 9 of two adjacent extinguishing agent outlets 8 of the same group is also smaller than an overlap area 231 of cover areas of adjacent extinguishing agent outlets 8, 108 of different groups.

[0089] The embodiment according to Fig. 9 However, it differs from the embodiment according to Fig. 8The advantage of this embodiment is that the second group of extinguishing agent outlets 108 cannot discharge the extinguishing agent independently of the discharge of the extinguishing agent via the extinguishing agent outlets 8 of the first group. In particular, in this embodiment, the extinguishing agent can be discharged a) via the extinguishing agent outlets 8 of the first group independently of the discharge of the extinguishing agent via the extinguishing agent outlets 108 of the second group, and b) via the extinguishing agent outlets 108 of the second group depending on the discharge of the extinguishing agent via the extinguishing agent outlets 8 of the first group. To achieve this, the extinguishing device comprises a pipe system with a first section 405 and a second section 505, wherein the first section 405 and the second section 505 are connected to each other via valves 440.

[0090] The extinguishing device is designed such that the extinguishing agent is supplied to the first section 405 of the pipe system, and the second section 505 of the pipe system is also supplied with extinguishing agent when the valves 440 are open. With the valves 440 open, the extinguishing agent outlets 108 of the second group are therefore supplied via the first section 405 of the pipe system. The second section 505 of the pipe system does not have a direct connection to an extinguishing agent supply. In this embodiment as well, the extinguishing agent supply can be, for example, as described above with reference to... Fig. 4 described below.

[0091] Although not shown for clarity, the fire extinguishing systems also include those according to the Figure 8 and 9Detection devices designed to detect a location where a fire has occurred or is likely to occur. The detection device preferably corresponds to the one described above with reference to Fig. 4 The detection device 11 can therefore have several detectors 12 for detecting the location where a fire has occurred or is likely to occur, the detectors 12 being arranged along straight lines oriented in the guidance direction 21.

[0092] Although the extinguishing device and the solar panels are arranged in a specific way in the embodiments described above, the extinguishing device and / or these solar panels can also be arranged differently in other embodiments. For example, opposing solar panels on the roof can be arranged at such an angle that the respective higher side of each solar panel 10 faces the opposite solar panel, as shown in Fig. 7 is shown schematically. In this embodiment as well, the solar system includes a fire extinguishing system with extinguishing agent outlets, which are preferably designed such that the extinguishing agent can be applied to the areas below the solar panels 10. The corresponding pipes and extinguishing agent outlets are shown in Fig. 7 Not shown for clarity, as this is only meant to illustrate an alternative arrangement of the solar panels.

[0093] Although in the above with reference to the Figure 1 ,3 and 7 While the described embodiments describe solar panels being arranged on the roof by means of a plate, the solar panels can, of course, also be arranged on the roof in other ways. For example, the solar panels can be attached to the roof using a rail system. It is also possible for the solar panels to be attached directly to the roof, that is, in particular without a plate between the solar panels and the roof.

[0094] The control systems described above are designed to execute the corresponding control procedures. These procedures can be implemented as program code in a computer program and / or as corresponding hardware. The control systems include, in particular, programmable logic controllers (PLCs).

[0095] In the claims, the words "show" and "comprise" do not exclude other elements or steps, and the indefinite article "a" does not exclude a plurality.

[0096] A single unit or device can perform the functions of several elements listed in the claims. The fact that individual functions and elements are listed in different dependent claims does not preclude the possibility of advantageously using a combination of these functions or elements.

[0097] A computer program can be stored and / or distributed on a suitable medium, such as an optical storage medium or a solid-state storage medium, which is sold together with or as part of other hardware. However, the computer program can also be distributed in other forms, for example via the internet or other telecommunications systems.

[0098] The reference numerals in the claims are not to be understood as limiting the subject matter and scope of protection of the claims by these reference numerals. Reference symbol list

[0099] 1 Roof 2 Panel 3 First row of solar panels 4 Second row of solar panels 5, 105, 205, ..., 505 Horizontal pipes for supplying the extinguishing agent 6 Vertical pipes for supplying the extinguishing agent to the extinguishing nozzles 7 Support struts for solar panels and pipes 8, 108 Extinguishing nozzle, extinguishing agent outlet 9, 109 Coverage area of ​​an extinguishing nozzle 10 Solar panel 11 Linear heat detector 12 Detector 13 Pipe from foam generator to pipe 5 14 Pipe from spray water valve to foam generator 15 Control unit 16 Wiring between heat detector and control unit 17 Spray water valve 18 Wiring between spray water valve and control unit 19 Triggering mechanism, solenoid valve 20 Foam generator 21 Guidance direction 22...25 Group effective area, extinguishing zone 40 Overlap area of ​​extinguishing zones 41 Boundary area 42 Boundary line 43 Bottom side of an installed solar panel 44 Top side of an installed solar panel 45 Extinguishing line 230, 231 Overlap area of ​​coverage areas 440 Valves

Claims

1. Fire extinguishing system for a roof with a solar installation, the solar panels of which are to be arranged in rows on the roof, wherein the rows of solar panels are to be aligned in a guiding direction (21), wherein the fire extinguishing system comprises: - an extinguishing apparatus with a plurality of groups of extinguishing agent outlets (8, 108) for discharging an extinguishing agent on the roof (1), each group of extinguishing agent outlets (8, 108) being assigned to a respective spatial extinguishing area (22, 23), wherein the extinguishing apparatus is configured such that extinguishing agent is dischargeable by means of extinguishing agent outlets (8) of a group independently of a discharging of extinguishing agent by means of extinguishing agent outlets (108) of another group, and - a detection apparatus (11) configured to detect as a detection location a location where a fire has occurred or is likely to occur, characterized in that each extinguishing area (22, 23) is assigned a pipe system (5, 105) for guiding the extinguishing agent to the respective extinguishing agent outlets (8, 108), wherein the pipe system (5) of an extinguishing area (22) is configured such that the extinguishing agent outlets (8) are arranged along pipes being offset from each other perpendicular to the guiding direction (21), which extend in the guiding direction (21), wherein the pipe system (105) of another extinguishing zone (23) is also configured such that extinguishing agent outlets (108) are arranged along pipes offset from each other perpendicular to the guiding direction (21), which extend in the guiding direction (21), wherein at least two extinguishing areas (22, 23) overlap in the guiding direction (21), and in that the extinguishing agent outlets (8, 108) comprise extinguishing nozzles that point alternately in opposite directions, so that a plurality of extinguishing agent outlet positions are present along a respective pipe, wherein a single extinguishing nozzle is arranged at one and the same of the plurality of extinguishing agent outlet positions in such a way that, in relation to a projection in a horizontal plane, it points in a specific direction, wherein the extinguishing nozzles have a horizontal discharge angle of less than 360°.

2. Fire extinguishing system according to claim 1, characterized in that the fire extinguishing system comprises a controller (15) which is configured to control the extinguishing apparatus in dependence on the detection location, wherein the controller (15) is preferably configured to determine in which extinguishing area (22, 23) the detection location is located and to control the extinguishing apparatus in such a way that the extinguishing agent is discharged in the determined extinguishing area (22, 23).

3. Fire extinguishing system for a roof with a solar installation, the solar panels of which are to be arranged in rows on the roof, wherein the rows of solar panels are to be aligned in a guiding direction (21), wherein the fire extinguishing system comprises: - an extinguishing apparatus with a group of extinguishing agent outlets (8) for discharging an extinguishing agent onto the roof (1), wherein the group of extinguishing agent outlets (8) is assigned to a spatial extinguishing area, wherein the extinguishing area is assigned a pipe system (5) for guiding the extinguishing agent to the respective extinguishing agent outlets (8), wherein the pipe system (5) of the extinguishing area is configured such that the extinguishing agent outlets (8) are arranged along lines offset from each other perpendicular to the guiding direction (21) and running in the guiding direction (21), and - a detection apparatus (11) which is configured to detect as a detection location a location where a fire has occurred or is likely to occur, characterized in that the extinguishing agent outlets (8) comprise extinguishing nozzles which, pointing alternately in opposite directions, discharge extinguishing agent into a respective coverage region (9), so that a plurality of extinguishing agent outlet positions (8) are present along a respective pipe, wherein a single extinguishing nozzle is arranged at one and the same of the plurality of extinguishing agent outlet positions (8) such that, in relation to a projection in a horizontal plane, it points in a specific direction, wherein the extinguishing nozzles have a horizontal discharge angle of less than or equal to 270°, wherein coverage regions (9) of neighboring extinguishing nozzles of the group overlap.

4. Fire extinguishing system according to any of the preceding claims, characterized in that the detection apparatus (11) comprises several detectors (12) for detecting the location where a fire has occurred or is likely to occur, wherein the detectors (12) are arranged along straight lines, and preferably characterized in that the detectors (12) are arranged along straight lines that extend in the guiding direction (21).

5. Fire extinguishing system according to any of the preceding claims, characterized in that the extinguishing apparatus is configured to use extinguishing foam as an extinguishing agent, wherein the extinguishing apparatus comprises a pipe system, a water valve (17), and a foam generator (20) for generating extinguishing foam, wherein the pipe system is configured to guide water from the water valve (17) to the foam generator (20) and extinguishing foam from the foam generator (20) to the extinguishing agent outlets, preferably further characterized in that the extinguishing agent outlets are configured to also contribute to the generating of foam.

6. Fire extinguishing system according to any of the preceding claims, insofar as it refers back to claim 1, characterized in that i) the extinguishing apparatus is configured such that a) the extinguishing agent is dischargeable by means of extinguishing agent outlets (8) of one group independently of a discharging of the extinguishing agent by means of extinguishing agent outlets (108) of another group, and b) the extinguishing agent is dischargeable by means of extinguishing agent outlets (108) of the other group in dependence on a discharging of the extinguishing agent by means of extinguishing agent outlets (8) of the one group, or that ii) the extinguishing apparatus is configured such that a) the extinguishing agent is dischargeable by means of extinguishing agent outlets (8) of one group independently of a discharging of the extinguishing agent by means of extinguishing agent outlets (108) of another group, and b) the extinguishing agent is dischargeable by means of extinguishing agent outlets (108) of the other group independently of a discharging of the extinguishing agent by means of extinguishing agent outlets (8) of the one group.

7. Solar installation system for a roof (1), wherein the solar installation system comprises: - a fire extinguishing system according to any of claims 1 to 6, - at least one solar panel (10).

8. Solar installation system according to claim 7, characterized in that the detection apparatus (11) comprises a plurality of detectors (12) for detecting the detection location, wherein the detectors (12) are installed on the solar panel (10) in such a manner that, after installation on the roof (1), the detectors (12) are arranged below the solar panel (10).

9. Solar installation system according to claim 8, characterized in that the solar panel (10) is arranged inclined in such a manner on the roof (1) that it comprises an upper side (44) and an opposite lower side (43), wherein the detectors (12) are arranged below the solar panel (10) in the area of the upper side (44).

10. Solar installation system according to any of claims 7 to 9, characterized in that the extinguishing apparatus is configured such that, after the solar installation system has been installed on the roof (1), the extinguishing agent outlets (8) are arranged below the solar panel (10) in such a way that the extinguishing agent is dischargeable into a region below the solar panel (10).

11. Solar installation system according to any of claims 7 to 10, characterized in that the solar installation system comprises a plurality of solar panels (10) which are arranged next to each other in the guiding direction (21).