Automatic fire extinguishing system for parking spaces for electric vehicles

Abstract

An automatic fire extinguishing system (S) for extinguishing fires from electric vehicles has fire detectors (1) having at least one temperature sensor and / or smoke sensor which are connected to a central fire alarm system (3), wherein the fire detectors (1) are fixedly installed on the ground of parking spaces (A-L) for electric vehicles (9). The central fire alarm system (3) is designed to automatically actuate a system (4) for generating high-pressure water spray. High-pressure water spray is guided via a main pipeline (5) to central, lateral and / or vertical pipelines (6, 7, 7a, 6a) at the parking spaces (A-L). The central fire alarm system (3) actuates solenoid valves (20) in the pipelines (6, 7, 6a, 7a) such that high-pressure water spray is conducted to and discharged at only those parking spaces where a fire alarm has been triggered by a fire detector (1). The fire extinguishing system (S) according to the invention allows early detection of overheated or burning electric vehicles and targeted cooling or extinguishing of the electric vehicles (9) with a limited quantity of water.

Description

[0001] AUTOMATIC FIRE EXTINGUISHING SYSTEM FOR ELECTRIC VEHICLE PARKING SPACES

[0002] Technical area

[0003] The invention relates to an automatic fire extinguishing system, in particular for garages for electric cars.

[0004] State of the art

[0005] According to the Federal Statistical Office, the share of electric vehicles in road traffic in Switzerland today is approximately 1.5% of the total number of road vehicles. If vehicles with hybrid drive, i.e., vehicles with both a combustion engine and an electric motor, are included, the share is 6%. This share is expected to increase. It is well known that fires in electric cars differ greatly from those in cars with combustion engines. In particular, fires originating in electric car batteries can develop explosively and spread rapidly due to the so-called thermal runaway effect. A particular danger is that the chemical reactions in overheated batteries release oxygen, which further favors fires.

[0006] Fire protection systems installed today in parking garages are typically equipped with sprinkler systems that are triggered by the heat of the developing fire. These systems are primarily designed to extinguish fires in cars with combustion engines, as they are only triggered several minutes after the fire breaks out and are only partially effective in preventing the explosive development of battery fires. To date, there are no automatic fire protection systems on the market specifically designed for electric cars.

[0007] Fire protection systems for extinguishing electric car fires are known from patent literature. For example, CN 215537956U discloses a system for extinguishing fires in an electric charging station. It is equipped with flame detectors on the garage ceilings and a water droplet sprinkler system. A high-pressure water pump sprays a large amount of water over the area of ​​the sprinkler system via nozzles on vertical columns. The system features a water tank that is continually refilled from the local water supply as needed. The large amount of water is intended to cool the burning cars and extinguish the fire.

[0008] Another system, as disclosed in CN112370703, features a sensor on the floor of a parking space that can detect the presence of a vehicle, smoke and flame sensors, and temperature sensors to measure the temperature of the vehicle's underbody. If the measured temperature exceeds a threshold, a visual or audible alarm is triggered to summon personnel to inspect the vehicle. Upon detection of smoke or flames, sprinkler systems are activated, directing a mixture of water and air to the vehicle via a pipe system.

[0009] WO2021 175391 discloses a movable fire extinguishing device for vehicles. It consists of pipes and a plurality of nozzles for extinguishing water. In the event of a fire, the device is placed underneath and to the side of a car. Preferably, the pipes with the nozzles are arranged on a movable frame so that, in the event of a fire alarm, the pipe system can be pushed or moved toward the burning car. Neither a fire detection method nor a connection to an extinguishing water source are disclosed.

[0010] Description of the invention

[0011] The present invention is based on the finding that known sprinkler systems are too slow to react given the rapid fire outbreak in electric vehicles, and that the water sprayed downwards from the ceilings by the sprinkler systems cannot sufficiently cool the batteries in the floor of the electric vehicles. Therefore, the object of the invention is to create an improved fire extinguishing system for electric vehicles that avoids this disadvantage.

[0012] An automatic system for extinguishing fires from electric vehicles according to the present invention comprises the following components:

[0013] - one or more fire detectors, each of which can be permanently installed on the floor of an electric vehicle parking space and which has at least one temperature sensor and / or one smoke sensor,

[0014] - a fire alarm control panel connected to each of the one or more fire detectors,

[0015] - a system for generating high-pressure water mist, to which a main pipeline for high-pressure water mist is connected, the main pipeline being designed to lead to one or more parking spaces,

[0016] - one or more pipes connected to the main pipeline at one or more parking spaces and adapted to be fixed to the floor of the one or more parking spaces,

[0017] - Nozzles for the application of the high-pressure water mist, whereby nozzles are arranged on the pipes and can be directed upwards, i.e. towards the underbody of an electric vehicle parked in the parking lot,

[0018] - the fire alarm control panel being designed, in the event of an alarm based on a signal from a temperature sensor and / or smoke sensor in the fire detector, to control the high-pressure water mist generation system and to trigger the introduction of high-pressure water mist into the main pipeline and the pipelines.

[0019] The invention has the advantage that, using fire detectors on the floor of each parking space, an increase in the temperature of an electric vehicle's battery located there or smoke escaping from the car floor can be detected at an early stage. This allows the development of overheating and the potential outbreak of a battery fire to be detected as early as possible, and allows timely and appropriate cooling of the battery to be initiated. This way, the outbreak of a fire can be prevented or a fire can be extinguished early. By connecting the fire detectors to the fire alarm control panel, the fire alarm control panel can automatically control the system for generating and distributing high-pressure water mist based on an electrical signal from the fire detectors and simultaneously alert the fire department.The signal from the temperature sensors integrated into the fire detectors can be sent to the fire alarm control panel either when a predetermined temperature value is exceeded or when a predetermined temperature rise occurs. This triggers an action even if the battery temperature rises excessively. High-pressure water mist can be directed early and specifically to the area of ​​the underbody and the battery of the electric vehicle located there, effectively cooling the battery. This prevents the spread of the thermal runaway effect in the battery and prevents the outbreak of a fire.

[0020] To cool the underbody of an electric vehicle parked in a parking space, the nozzles for the high-pressure water mist are directed upwards. This means that the high-pressure water mist is sprayed vertically upwards from the nozzles and at an angle around the vertical onto the underbody of the electric vehicle. The angle, the number of nozzles, and the spacing between the nozzles are coordinated so that the high-pressure water mist reaches the entire underbody of the vehicle as much as possible.

[0021] The use of high-pressure water mist, in particular, enables the cooling of overheated batteries and the extinguishing of fires in a short time. Furthermore, the use of high-pressure water mist enables the containment of fires with a small amount of water. This allows the inventive extinguishing system to be installed in existing parking garages without the need for an additional water supply system, as would be necessary with conventional systems. Instead, the inventive system can be implemented with a water tank of limited size. This also makes the system cost-effective.

[0022] The arrangement or fastening of fire detectors on the floor of parking spaces and the arrangement or fastening of the pipes for the high-pressure water mist on the floor of the parking spaces does not require any significant structural changes to the parking garage. An existing garage can be retrofitted easily and inexpensively with the system according to the invention. The fastening of the pipes to the floor of a parking space should be understood to mean that fastening the pipes to the floor includes fastening to the surface of the ground, i.e., fastening both on the surface and below the surface of the ground. When fastening the pipes below the surface of the ground, the pipes can be placed slightly recessed into the ground.

[0023] In one embodiment of the invention, the automatic fire extinguishing system comprises first central pipelines with nozzles that are connected to the main pipeline and can be arranged on the floor of each parking space, and in particular longitudinally along the center of the parking space, thus extending under and along the center of a vehicle parked there. The nozzles are designed to project high-pressure water mist upwards at an angle around the vertical. By projecting high-pressure water mist through these nozzles, the underbody of a vehicle is cooled or extinguished.

[0024] In one embodiment of the invention, the automatic fire extinguishing system comprises lateral pipelines with nozzles that are connected to the main pipeline and can be arranged longitudinally on the floor and sides of each parking space, thus extending along the sides of a vehicle parked there. The nozzles are designed to emit high-pressure water mist at an angle that ranges from horizontal, i.e., along the floor, to a predetermined angle upwards. The high-pressure water mist is sprayed from these nozzles underneath the vehicle, onto the floor of the vehicle, and onto the sides of the vehicle. These lateral pipelines and nozzles serve to cool the electric vehicle from the sides and, in particular, to prevent heat or fire from spreading to a nearby vehicle.

[0025] Preferably, the system according to the invention comprises pipes which can be arranged both centrally along the longitudinal direction and laterally along the longitudinal direction of the parking spaces.

[0026] In a further embodiment of the invention, the system for distributing high-pressure water mist comprises vertical pipes arranged near the corners of each parking space and extending upwards from the ground. The pipes have nozzles configured to deliver high-pressure water mist along the sides of the parking space and at a predetermined angular range.

[0027] The arrangement of the nozzles on the vertical pipes also allows high-pressure water mist to be projected along the sides of an overheated or burning vehicle, thus preventing a fire from spreading to a nearby vehicle.

[0028] In a further embodiment of the invention, the system for distributing high-pressure water mist comprises additional pipes that can be arranged on the floor of the parking space and are connected to the main pipeline. These pipes extend parallel to the short side of the parking space. They have nozzles designed to project high-pressure water mist horizontally and upwardly within a predetermined angular range. These nozzles enable the application of high-pressure water mist to the underbody of a vehicle parked there.

[0029] The system according to the invention preferably comprises both vertical pipes and the additional pipes along the short side of the parking space. In one embodiment of the invention, the pipes for the high-pressure water mist, which are connected to the main high-pressure water mist pipe, are each equipped with solenoid valves, wherein the solenoid valves are connected to and controlled by the fire alarm control panel. This allows only the solenoid valves of the pipes of the parking space where an alarm has been detected due to a temperature increase and / or the presence of smoke to be opened. This means that cooling or extinguishing is only carried out specifically in the parking space with a vehicle with a defective or burning battery.By targeting cooling and extinguishing in just one or a few parking spaces where a fire is occurring or has occurred, the amount of water required to operate the extinguishing system is further reduced.

[0030] In a further embodiment of the invention, the system for generating high-pressure water mist comprises one or more water tanks as a water reservoir, as well as an electric high-pressure water pump. The electric pump is connected to the main pipeline for the high-pressure water mist. This system can also generate sufficient high-pressure water mist with a limited amount of water, eliminating the need for an additional water supply. However, this system requires an electrical connection to the backup power supply, which can be provided, for example, with accumulators.

[0031] In a further embodiment of the invention, the system for generating high-pressure water mist again comprises one or more water tanks as a water reservoir, and also a high-pressure water pump which can be driven by an internal combustion engine and which is connected to the main pipeline for supplying high-pressure water mist.

[0032] In a further embodiment of the invention, the system for generating

[0033] High-pressure water mist comprises one or more non-pressurized water tanks as a water reservoir, as well as at least two pressure-resistant water tanks and one or more gas cylinders for a gas, e.g. nitrogen. The pressure-resistant water tanks are each connected to a gas cylinder on one side and to the non-pressurized water tank as a water reservoir on the other. In addition, a line leads from each of the pressure-resistant water tanks into the main pipeline for the high-pressure water mist. This system for generating high-pressure water mist enables water to be fed from the water reservoir into the pressure-resistant water tanks. Using nitrogen or another suitable gas from the gas cylinders and the opening of a valve on a first of the at least two pressure-resistant water tanks, high-pressure water mist is fed into the main line of the pipe system.When the first pressure-resistant water tank is empty, the valve on this first tank is closed and the valve on the second pressure-resistant water tank is opened. This allows high-pressure water mist to flow from the gas cylinders in the second pressure-resistant water tank into the main high-pressure water mist pipeline. While the second pressure-resistant water tank empties, the first pressure-resistant water tank is refilled with water from the water reservoir. Once the second pressure-resistant water tank is empty, the valve on the first pressure-resistant water tank is opened again for high-pressure water mist.

[0034] An extinguishing system according to the invention with this type of system for generating high-pressure water mist is particularly cost-effective, as only two relatively small pressure-resistant water tanks are required. Pressure-resistant water tanks are very expensive compared to conventional water tanks. Therefore, the manufacturing costs of a system of this type are kept within limits thanks to the small number and small size of the pressure-resistant water tanks. However, the concept of alternately filling the pressure-resistant water tanks enables continuous generation of high-pressure water mist. The water tank for filling the pressure-resistant water tanks is dimensioned to ensure the generation of high-pressure water mist for 30 minutes, which corresponds to the response time of the fire department. The water tank as a water reservoir must therefore be designed for a capacity of only, for example, 1500 l.A separate water supply is therefore unnecessary, which in turn makes retrofitting a parking garage with this system easier. Furthermore, the operation of this system does not require an additional backup power supply.

[0035] In a further embodiment of the invention, the system for generating high-pressure water mist comprises one or more water tanks as a water reservoir, a pneumatic pump, and one or more gas cylinders for compressed air. The pneumatic pump is connected to the main pipeline for the high-pressure water mist supply. This system has the advantage that it can generate high-pressure water mist with a limited amount of water during the intervention time until a fire department arrives on site. In Switzerland, this time is less than 30 minutes. An additional water supply is not necessary for the operation of the system according to the invention. Furthermore, this system does not require an additional backup power supply.

[0036] The system according to the invention is suitable for parking garages or parking spaces for vehicles, particularly electric vehicles. The parking spaces or parking garages can be of any size with any number of parking spaces. The size of the parking spaces can also be of any size, i.e., they can be designed for private vehicles as well as for buses or other larger vehicles. Due to its design, the system according to the invention is easily scalable. With appropriately configured nozzles, it can be designed for parking spaces, for example, for vehicles with two to six seats, and can also be designed for parking spaces up to 12 m long, such as for buses, coaches, or trucks.

[0037] Further advantages of the invention will become apparent from the dependent claims and from the following description, in which the invention is explained in more detail with reference to an embodiment illustrated in the schematic drawings. It shows: Brief description of the figures

[0038] It shows

[0039] Fig. 1 is a schematic representation of the system according to the invention for the automatic extinguishing of fires in electric vehicles in a parking garage with fire detectors on the floor of each parking space, a fire alarm control panel, a system for generating high-pressure water mist, a main pipeline and central and lateral pipelines with nozzles,

[0040] Fig. 2 is a schematic representation of the system according to the invention for automatically extinguishing fires in electric vehicles, wherein the system for generating high-pressure water mist comprises a non-pressure-resistant water tank, several gas cylinders and two pressure-resistant water tanks,

[0041] Fig. 3 is a schematic detailed representation of the system for generating high-pressure water mist according to Fig. 2.

[0042] Fig. 4 the system from Fig. 3 with representation during operation,

[0043] Fig. 5 is a view of a single parking space with fire detectors according to the system according to the invention and pipes with nozzles for high-pressure water mist attached to the floor of the parking spaces,

[0044] Fig. 6 is a view of a single parking space with fire detectors according to the inventive system and with vertical pipes with nozzles for the discharge of high-pressure water mist according to the inventive system. Fig. 7 is a view of a single parking space with the inventive extinguishing system as in Fig. 6 and additional pipes with nozzles for high-pressure water mist parallel to the short side of the parking space.

[0045] In the figures, the same reference symbols have been used for the same elements and initial explanations apply to all figures unless expressly stated otherwise.

[0046] Embodiments of the invention

[0047] Figure 1 discloses the basic principle of the inventive automatic fire extinguishing system S for electric vehicles, as well as its essential features. The entire system S is stationary in a parking space for one or more electric vehicles. A parking lot with 12 parking spaces A - L for electric passenger vehicles is shown here as an example. The system can be installed next to the parking space in a space-saving manner. A fire detector 1 with at least one temperature sensor is installed on the floor at each parking space A - L, with the fire detectors connected to a fire alarm control panel via an electrical signal line 2. The fire detectors are preferably placed in the center of each parking space so that they are as close as possible to the battery of an electric vehicle parked there. A tank 4 for extinguishing water and a system 4 connected to the tank for generating high-pressure water mist are arranged next to the parking spaces.The system 4 can be a system with a non-pressurized water tank, two pressurized water tanks, and gas cylinders. It can also be a system with a water tank and a pneumatic high-pressure pump, or a system with a water tank and an electric high-pressure pump. A main pipeline 5 for supplying high-pressure water mist leads from the system 4 to the individual parking spaces AL, with one or more pipelines 6, 7 branching off from the main pipeline 5 at each parking space. They serve to deliver high-pressure water mist to various parts of each parking space. The pipelines 6, 7 are arranged at the floor of the parking space and extend the length of each parking space. First pipelines 6 run through the center of each parking space along its longitudinal direction. Second pipelines 7 run along the sides of each parking space, also along the longitudinal direction. The pipelines 6, 7 have several nozzles 8 for dispensing the high-pressure water mist.The nozzles 8 are designed and aligned so that high-pressure water mist is directed upwards from the ground onto the floor of an electric vehicle 9. The nozzles on the laterally arranged pipes 7 are also aligned so that high-pressure water mist is directed both onto the underbody of the electric vehicle and onto the sides of the electric vehicle 9.

[0048] If an electric vehicle 9 is parked in a parking space equipped with a fire extinguishing system according to the present invention, its floor and battery are located near the fire detector 1 of the respective parking space. If the battery overheats due to a defect or overcharging, the temperature and / or temperature rise of the underside of the electric vehicle 9 and / or smoke escaping from the battery are detected by the fire detector 1. If the temperature or temperature rise or the amount of smoke exceeds a predetermined threshold, an electrical signal is sent via the signal line 2 to the fire alarm system 3. This then triggers the activation of the system 4 to generate high-pressure water mist, which is fed to the respective parking space for cooling and extinguishing purposes. The high-pressure water mist is fed into the main pipeline 5 for this purpose.The fire alarm control panel 3 also controls the opening of valves, in particular solenoid valves, located at branches of the main pipeline 5 where pipelines 6 and 7 branch off from the main pipeline. The control of the valves by the fire alarm control panel based on information from a specific fire detector 1 enables high-pressure water mist to be directed only to the parking lot where a fire detector has detected an excessive temperature rise or excessive temperature or smoke particles.

[0049] Figure 2 shows the system S according to the invention with a preferred embodiment of the system 4 for generating the high-pressure water mist. This system 4a has water tanks 10 that are not pressure-resistant, for example made of plastic, as well as at least two pressure-resistant water tanks 11a and 11b, and gas cylinders 12 containing nitrogen or another gas. These components enable the continuous generation of high-pressure water mist for a period of time until a fire department can arrive on site. This period is, for example, 30 minutes, which corresponds to the fire department's response time. The high-pressure water mist generated during this time can be generated with a limited amount of water, so that a water reservoir in the form of a water tank of limited size is sufficient. This amount is, for example, 1500 liters. The required water tank can thus be easily installed in an existing parking garage without any structural measures.The pressure-resistant water tanks 11a, b required to generate the high-pressure water mist are of limited size, for example, 2 x 20 liters, so they are cost-effective and can be installed in a space-saving manner. The detailed structure and operation of the system 4a for generating the high-pressure water mist are shown in Figures 3 and 4.

[0050] Figures 3 and 4 show the two pressure-resistant water tanks 11a, 11b, each connected to two nitrogen gas cylinders 12 via a gas line 13a, b. Furthermore, each of the two pressure-resistant water tanks 11a, b is connected to the water tank 10 via a water line 14a, b with a valve 15a, b. A pipe 16a, b with a valve leads from each of the two pressure-resistant water tanks 11a, b, through which the generated high-pressure water mist is directed to the main pipe 5.

[0051] In the event of a detected fire, the fire alarm control panel 3 activates the system 4a for generating high-pressure water mist by closing the valve in the gas line 13a and opening the valve 15a in the water line 14a. This causes water to flow into the pressure-resistant water tank 11a. As soon as the water tank 11a is full, the valve 15a is closed and the valve in the gas line 13a is opened, so that the water is pressurized by the gas from the gas cylinders. In the pressure-resistant water tanks, the water is held at 80 bar, for example. Once the pressure-resistant tank 11a is full, the first valve in the pipe 16a for the high-pressure water mist is opened, and the high-pressure water mist is directed into the main pipe 5.As the fill level in the first pressure-resistant water tank 11a drops, the second gas valve in the gas line 13b is closed, and the second valve 15b in the water line 14b from the water tank 10 is opened, filling the second pressure-resistant tank 11b. As soon as the fill level in the first pressure-resistant tank 11a falls below a predetermined level, the valve 16b for high-pressure water mist from the second pressure-resistant water tank 11b is opened. The valve in the water line 14b and the valve 16a are then closed. This allows one water tank to be filled alternately while the other water tank is emptied, ensuring a constant high-pressure water mist.

[0052] System 4a has the advantage that high-pressure water mist can be generated cost-effectively using pressure-resistant water tanks of limited size. The limited amount of water required to operate the fire extinguishing system is sufficient, as high-pressure water mist is only supplied to those parking spaces where a fire actually exists.

[0053] Figure 5 shows a first embodiment of the system according to the invention, in particular an embodiment of the pipes with nozzles for distributing the high-pressure water mist within a parking lot. The main pipe 5 is shown, which supplies the high-pressure water mist from the high-pressure pump. Pipes 6 and 7 lead away from the main pipe 5, with the flow of high-pressure water mist into these pipes 6 and 7 being triggered by solenoid valves 20. The solenoid valves 20 are in turn controlled by the fire alarm control panel. All pipes 6 and 7 are arranged on the floor of the parking lot. Pipe 6 runs through the center and in the longitudinal direction of the parking lot. At least one nozzle 8 is arranged on this pipe 6 and is aligned such that high-pressure water mist can be sprayed from the floor upwards onto the underbody and the battery area of ​​an electric vehicle 9 parked there.These nozzles ensure early cooling of an overheated battery and also extinguish a fire should one already break out. The pipes 7 are lateral pipes and run along both long sides of the parking space. The attached nozzles 8 are designed to spray high-pressure water mist onto the ground, along the ground, onto the underbody of the vehicle, and also onto the sides of the vehicle. The lateral pipes 7 with nozzles 8 ensure cooling and extinguishing of the vehicle on its sides and prevent heat and flames from spreading to an adjacent parking space.

[0054] Figure 6 shows an embodiment of the extinguishing system according to the invention with vertically arranged pipes, wherein the vertical pipes 7a are each connected to the main pipe 5 and extend vertically upwards at the corners of the parking spaces. Nozzles 8b for high-pressure water mist on the vertical pipes 7a are aligned at a predetermined angle along the sides of the parking spaces to deliver the high-pressure water mist. The vertical pipes 7a are in turn equipped with solenoid valves 20.

[0055] Figure 7 shows another embodiment of the arrangement of pipes and nozzles for high-pressure water mist. Here, in addition to the vertical pipes at the corners of the parking spaces, as shown in Figure 6, another pipe 6a leads away from the main pipe 5 and extends along the ground parallel to the main pipe 5 and parallel to the short side of the parking space, and thus along the front or rear of a vehicle parked there. Nozzles 8a on the second central pipes 6a are directed at the underbody of the vehicle. The nozzles 8a spray high-pressure water mist, for example, at an angle range of 0° to 20° relative to the ground plane.

[0056] Further vertical pipes 7a lead vertically upwards from the main pipe 5. Nozzles 8b on the vertical pipes 7a direct high-pressure water mist at a predetermined angular range along the sides of a vehicle. The high-pressure water mist is preferably generated by a water pressure of 80 bar, for example in a range of 40 to 80 bar. This water pressure ensures a high-pressure water mist with droplet sizes in a range of 50 to 100 micrometers. Such pressures and droplet sizes ensure a range of the applied high-pressure water mist of up to 8 meters. This ensures both cooling and extinguishing over the area of ​​a parking space for passenger electric vehicles. In all versions, the pipes are shown attached to the ground. As mentioned, attaching the pipes to the ground includes both attachment to the surface of the ground and attachment below it.When mounted on the surface, they are arranged lying on the ground as shown in the figures. When mounted below the surface, the pipes are slightly recessed into the ground. To position the pipes, the ground is first slightly milled, and the pipes are then placed there. This also applies to the nozzles associated with the pipes, which can also be placed slightly recessed into the ground.

[0057] List of reference symbols

[0058] 1 fire detector

[0059] 2 electrical signal lines

[0060] 3 fire alarm control panel

[0061] 4, 4a System for generating high-pressure water mist

[0062] 5 Main pipeline for high-pressure water mist

[0063] 6 Pipeline in the middle of the parking lot

[0064] 6a Pipeline

[0065] 7 lateral pipeline along side of parking lot

[0066] 7a vertical pipeline

[0067] 8 nozzles

[0068] 8a, b nozzles

[0069] 9 electric vehicle

[0070] 10 Water tank, not pressure-resistant

[0071] 11a, b pressure-resistant water tanks

[0072] 12 gas bottles

[0073] 13a, b Gas line with valve

[0074] 14a, b water pipe

[0075] 15a, b Valve in water pipe

[0076] 16a, b Pipeline for high-pressure water mist

[0077] 20 Solenoid valve

[0078] AL parking space for electric vehicles

[0079] S Automatic fire extinguishing system

Claims

Patent claims 1. Automatic system (S) for extinguishing fires from electric vehicles characterized by - one or more fire detectors (1 ), each of which can be permanently installed on the floor of a parking space (AL) for electric vehicles (9) and which have at least one temperature sensor and / or smoke sensor, - a fire alarm control panel (3) connected to each of the one or more fire detectors (1), - a system (4) for generating high-pressure water mist, to which a main pipeline (5) for high-pressure water mist is connected, the main pipeline (5) being designed to lead to one or more parking spaces (AL), - one or more pipelines (6, 7, 6a, 7a) connected to the one or more parking spaces of the main pipeline (5) and designed to be arranged on the floor of the one or more parking spaces (AL), Nozzles (8) for dispensing the high-pressure water mist, which are arranged on the pipes (6, 7, 6a, 7a) and which can be directed upwards, - wherein the fire alarm control panel (3) is designed, in the event of an alarm due to a signal from a temperature sensor and / or smoke sensor in the one or more fire detectors (1), to control the system (4) for generating high-pressure water mist and to trigger the supply of high-pressure water mist into the main pipeline (5) and the pipelines (6, 7, 6a, 7a).

2. Automatic system (S) according to claim 1, characterized in that the system (4) for generating high-pressure water mist comprises one or more water tanks as a water reservoir and an electric high-pressure water pump, wherein the electric pump is connected to the main pipeline for conducting high-pressure water mist.

3. Automatic system (S) according to claim 1, characterized in that the system (4) for generating high-pressure water mist comprises one or more water tanks as a water reservoir and a high-pressure water pump which can be driven by an internal combustion engine, the same high-pressure water pump being connected to the main pipeline (5) for conducting high-pressure water mist.

4. Automatic system (S) according to claim 1, characterized in that the system (4a) for generating high-pressure water mist comprises a non-pressure-resistant water tank (10), at least two pressure-resistant water tanks (11a, 11b), each connected to the non-pressure-resistant water tank (10), and one or more gas cylinders (12), wherein the pressure-resistant water tanks (11a, 11b) are each connected to a gas cylinder (12) via a line (13a, 13b) and a line (16a, 16b) leads from each of the pressure-resistant water tanks (11a, 11b) into the main pipeline (5) for the supply of high-pressure water mist.

5. Automatic system (S) according to claim 1, characterized in that the system (4) for generating high-pressure water mist comprises one or more water tanks as a water reservoir, a pneumatic pump and one or more gas cylinders for compressed air, wherein the pneumatic pump is connected to the main pipeline for the supply of high-pressure water mist.

6. Automatic system (S) according to one of claims 1-5, characterized by central pipes (6) connected to the main pipe and arranged on the floor of a parking space (AL) and in the longitudinal direction along the center of the parking space, wherein the central pipes (6) have nozzles (8) which are directed upwards.

7. Automatic system (S) according to one of claims 1 - 6, characterized by lateral pipes (7) for the conduction of high-pressure water mist, which are connected to the main pipe (5) for high-pressure water mist and can be arranged on the floor of each parking space (AL) and along the sides in the longitudinal direction of the parking spaces (AL), wherein the lateral pipes (7) have nozzles (8) for the application of high-pressure water mist and the nozzles (8) for the application of high-pressure water mist are designed in an angular range from horizontal to a predetermined angle upwards.

8. Automatic system (S) according to one of claims 1-7, characterized by vertical pipelines (7a) for high-pressure water mist, which are connected to the main pipeline (5) for high-pressure water mist and are designed to be arranged in the region of the corners of each parking space (AL) and extend upwards from the ground, wherein the vertical pipelines (7a) have nozzles (8b) designed to apply high-pressure water mist along the sides of the parking spaces (AL) and in a predetermined angular range.

9. Automatic system (S) according to one of claims 1-8, characterized by further pipelines (6a) for high-pressure water mist, which are connected to the main pipeline (5), which are arranged parallel to the short side of a parking space (AL) and on the ground and have nozzles (8a) which are designed to apply high-pressure water mist in a horizontal direction and in a predetermined angular range upwards.

10. Automatic system (S) according to one of claims 1 -9, characterized in that Solenoid valves (20) are arranged in each of the central pipes (6), the lateral pipes (7), the vertical pipes (7a) and the further pipes (6a) connected to the main pipe (5) for high-pressure water mist, wherein the solenoid valves (20) are connected to the fire alarm control panel (3) and are controlled by the fire alarm control panel (3).

11. Automatic system (S) according to one of claims 1-10, characterized in that the pipes (6, 7, 6a) can be fastened to the surface of the floor of a parking lot.

12. Automatic system (S) according to one of claims 1-10, characterized in that the pipes (6, 7, 6a) can be mounted slightly recessed below the surface of the floor of a parking lot.

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