EP3634586B1 - Control device for operating a fire extinguisher system - Google Patents

Description

The present invention relates to a fire extinguishing system comprising a control device for operating the fire extinguishing system according to the preamble of claim 1.

Technological background

During a firefighting operation, the fire engine is first brought into position and the source of the fire is first fought with extinguishing fluid, which is contained in a tank in the fire engine. This means that the firefighting operation can begin as quickly as possible. At the same time, since the tank only has a limited volume and therefore only allows for a limited amount of extinguishing time, another source of extinguishing fluid is sought. These are usually permanently installed hydrants, streams or lakes. These offer an unlimited volume of extinguishing fluid. However, finding and connecting an appropriate source of extinguishing fluid to the fire engine's fire extinguishing system takes a certain amount of time.

The firefighter uses the fire extinguishing nozzle at the end of the water hose to fight the fire by spraying extinguishing fluid onto the fire under high pressure. If the firefighter intends to retreat from the fire, the fire extinguishing nozzle can be activated in such a way that the extinguishing fluid no longer leaves the fire extinguishing nozzle almost undistracted, but rather a wall of extinguishing fluid is formed that protects the firefighter from being affected by flames and/or heat when they retreat. If the firefighter is no longer able to form a wall of extinguishing fluid due to an abrupt interruption of the extinguishing fluid supply, there is a significant risk to the life and limb of the firefighter. As a result, the firefighter must Always know how much extinguishing fluid is left in the tank and whether a connection to another source of extinguishing fluid is already "established". This is the only way to ensure that the firefighter can withdraw from the fire in time if necessary.

During an operation, the risk can be increased if one or more additional extinguishing nozzles, all of which are supplied by a feed pump from the extinguishing fluid tank, are put into operation. This can cause the emptying speed of the extinguishing fluid tank to increase sharply. This can mean that the firefighter no longer has the necessary time to form the wall of extinguishing fluid.

Extinguishing fluid is extinguishing water or a mixture of extinguishing water and an additive in the form of foam or similar.

Printed state of the art

A control device for operating a fire extinguishing system according to the preamble of claim 1 is known, for example, from DE 689 02 671 T2 This known control device comprises a cable communication system with a transmission line positioned in the water hose for a communication link between a firefighter standing at the leading end of the water hose and the operating personnel on the fire engine side. The cable communication system is intended in particular to enable a voice connection. For this purpose, a receiver and a microphone are housed in the firefighter's helmet. The firefighter is therefore solely dependent on cable communication with the operating personnel on the fire engine side. This idea is therefore intended to improve voice communication from firefighter to operator. If this is not available for whatever reason, even at short notice, there is an increased risk for the firefighter at the source of the fire.

The EP 990 453 A1 shows a fire extinguishing device with a fire extinguisher pistol that is connected to a high-pressure device via a hose. The end of the hose opposite the fire extinguisher pistol is connected to two chambers via a three-way valve, with one chamber holding foam-free extinguishing water and the other chamber holding a water-foam mixture. An actuating device is provided on the fire extinguisher pistol that is connected to a base via an electrical line integrated into the hose.

G 87 10 073.8 shows a foam proportioning device for fire fighting with a foam tank, a water tank and an inlet connection for a hydrant, lake or river. A changeover valve with a pivoting shut-off valve is provided in the area of the inlet connection.

Out of US 7,987,916 B2 A control device for a fire extinguishing system with a control panel mounted inside or outside a fire engine is known. The control panel allows the firefighter to select different operating modes for the fire extinguishing system. The control device also includes a device for determining the pressure of a feed pump connected to the tank. If the tank is empty, a warning signal is issued to the operator on the control panel.

The WO 95/07526 shows an electro-optical device for creating a real firefighting scene. The device includes a video camera that can be housed in a firefighter's helmet. The recorded data is transmitted to a data center. There, the transmitted data is combined with stored data, e.g. precise position data, to support the firefighting operation.

In the DE 10 2008 004 785 A1 A portable system for the protection and orientation of firefighters in buildings is described. The system includes an infrared camera for recording thermal image data and a display device. The display device can be used as a head-up display in the helmet of the The data is transmitted directly from the thermal imaging camera to the head-up display via radio.

From the DE 20 2015 002 738 U1 A fire extinguisher with a fire extinguisher gun connected via an extinguishing agent hose is known, with a sensor in the form of a thermal imaging camera or another heat detection device being mounted on the fire extinguisher gun and the optical axis of the sensor running approximately parallel to the nozzle tube axis of the fire extinguisher gun. The sensor can be connected to a receiver via an antenna via a radio link. The receiver can be either a display arranged on the fire extinguisher gun or an image generation device worn by the firefighter on his helmet, to which the data is transmitted via a radio link.

The DE 35 17 284 C2 describes a device for dispensing an extinguishing agent mixed with an additive. The device comprises an extinguishing agent gun at the end of a hose line, on which a button is arranged with which the firefighter operating the extinguishing gun can directly activate a premixer for adding additive to the extinguishing agent. The button is connected to a control device via lines positioned in the hose line.

In the US 8,418,773 B2 In the control system for firefighting operations described, the firefighter standing at the end of the hose line operates a display and control panel that is connected by radio to a base station on the fire engine. The display and control panel enables the firefighter to control the supply of extinguishing agent alone, i.e. without the help of an additional person on the fire engine. However, radio transmission is often subject to interference that can lead to a significant risk to the firefighter, particularly if, for example, a fire is inside a building and reinforced concrete ceilings impede radio transmission. The firefighter must switch off the tank when the tank is empty.

Furthermore, the US 9,220,935 B2 a nozzle for fire service use with a display directly on the nozzle for showing various parameters. The display is capable of communicating with remote components. The display shows the volume of water in the water tank and the water pressure in the supply line to the stationary water reservoir. Knowing the amount of water, the firefighter is forced to calculate the time remaining until the tank is empty. In addition, the emptying rate of the tank can suddenly increase if an additional fire hose is supplied with extinguishing fluid via the tank. The firefighter at the first fire hose also does not know how intensive the consumption of extinguishing fluid will be on the second fire hose that has just been put into operation.

The US 2012/0061108 A1 discloses a control system for tank fire engines. The control system includes a base component which is coupled to a pump by means of a communication connection. A tank and a liquid source are connected to the pump via two separate lines, each of which has a valve.

A compressed air foam fire extinguishing system with a control console is in the US 6,973,975 B1 described. The compressed air foam fire extinguishing system is mounted on a pick-up truck and comprises a manually operated two-way valve, which is connected on the inlet side to a water tank and a supply line for connection to an external water source, e.g. a lake. The outlet of the two-way valve is connected to a water pump. The two-way valve connects the water pump either to the water tank or, when switched, to the external water source.

The US 2012/0132445 A1 discloses a flow recording system for fire engines that automatically records flow events. The flow recording system comprises a control device that has various flow and/or pressure sensors. The fire engine comprises an internal water tank and an internal pump that supplies water from the internal water tank to hoses. Additionally, the internal water tank can be filled using a hydrant while the internal pump draws water from the internal water tank.

The DE 88 08 931 U1 describes a fire extinguishing device with a two-part tank for holding an extinguishing liquid. Both halves of the tank can be connected to a high-pressure pump via a 3-way valve, which is connected to a high-pressure cleaner.

The US 2005/0252664 A1 discloses a dry sprinkler system that is vacuumed and dry when the sprinklers are not activated. The dry sprinkler system includes a spring-loaded three-way valve connected to a first and a second water source. The three-way valve includes a valve seat comprising a spring-loaded hinge assembly that seals off the water supply from the first water source to the three-way valve when the second water source applies pressure to the three-way valve via a supply line. When the water pressure in this supply line drops, the three-way valve opens so that water flows from the first water source to the sprinklers. At no time does water flow from the second water source to the sprinklers via the three-way valve.

From the CN 202355740 U A three-wheeled fire engine is known which comprises a tank, a booster pump and two three-way valves. In the event of a fire, the booster pump builds up pressure on a water reservoir located outside the fire engine. This causes water to flow from the water reservoir through a first three-way valve into the tank and from there via a second three-way valve to a fire extinguisher.

The US 5,764,463 discloses a fire extinguishing system with a water pump. The water pump has an inlet which is connected to a raw water reservoir. The pump pumps the water from the raw water reservoir under pressure through a distributor into a hose. Furthermore, the fire extinguishing system comprises two foam tanks, each of which is assigned a three-way valve. Foam agents stored in the foam agent tanks can be fed alternately to the distributor via the three-way valves using a foam pump so that they mix with the water.

Object of the present invention

The object of the present invention is to provide a new generic control device for operating a fire extinguishing system, which, with a simple structural implementation, offers increased safety for the firefighter located at the fire extinguishing nozzle.

solution to the task

The above object is achieved by a fire extinguishing system according to claim 1. Expedient embodiments of the fire extinguishing system according to the invention are claimed in the dependent claims.

Because the first supply line to the tank and the second supply line to the stationary extinguishing fluid source are connected to a multi-way valve upstream of the feed pump, the switching of the extinguishing fluid flow from the tank to the stationary extinguishing fluid point can be done automatically. This means that the firefighter no longer needs to monitor valves in the feed lines of the feed pump and switch off the respective inlets. The switching can be done automatically with the multi-way valve, without the human operator having to intervene in the process.

According to the invention, the multi-way valve is a pressure-controlled multi-way valve.

The basic position of the multi-way valve connects the feed pump with the tank. In contrast, the multi-way valve is controlled by the The pressure present at the multi-way valve in the second supply line to the stationary fluid source must be controllable.

In the basic position of the multi-way valve, the tank is initially emptied during operation of the fire extinguishing system and, when the specified pressure is present at the multi-way valve in the second supply line, the supply of extinguishing fluid is switched away from the tank to the stationary extinguishing fluid source.

Because the pressure in the second supply line at the multi-way valve can be set using a separate pump, the pressure control of the multi-way valve can also be used when the extinguishing fluid coming from the stationary extinguishing fluid source is not under pressure (such as in the case of a hydrant), but has to be sucked in.

According to the invention, the multi-way valve switches at a pressure threshold value which is adjustable.

The multi-way valve is expediently a multi-way valve whose pressure-dependent switching point is determined by an elastic element, e.g. a spring, and/or by magnetic means.

Alternatively, the multi-way valve can also have a motor drive that can be controlled by the controller when the switching conditions occur.

If necessary, the switching position of the multi-way valve can also be conveniently displayed on a display located in the area of the extinguishing nozzle or by the firefighter operating it.

Preferably, a return line from the feed pump to the tank can be provided, which allows that during the supply of extinguishing fluid from the stationary extinguishing fluid source, a certain percentage of the extinguishing fluid quantity can be led back into the tank, allowing it to be refilled during firefighting operations.

According to the invention, the multi-way valve is connected via control line means to a controller serving as an operations center. This allows the switching position of the multi-way valve to be centrally monitored and/or even controlled if necessary.

The multi-way valve is advantageously designed as a switching valve.

Description of the invention based on embodiments

Fig. 1

eine stark vereinfachte Darstellung einer typischen Feuerwehreinsatzsituation bei der Bekämpfung eines Brandherds;

Fig. 2

eine stark vereinfachte schematische Darstellung einer Steuerungseinrichtung gemäß der vorliegenden Erfindung;

Fig. 3

eine stark vereinfachte schematische Darstellung des Bereichs der Kommunikationsbrücke zwischen der Löschdüse und dem im Helm der Feuerwehrperson vorgesehenen Display;

Fig. 4

eine stark vereinfachte schematische Darstellung des Einsatzes eines Mehrwegeumschaltventils und zwar in der Schaltstellung Förderung von Löschfluid aus dem Tank (Fig. 4a) sowie in der Schaltstellung Förderung von Löschfluid über die ortsfeste Löschfluidquelle (Fig. 4b), sowie

Fig. 5

eine stark vereinfachte schematische Darstellung der Anzeige in dem von der Feuerwehrperson mitgeführten Display.

Advantageous embodiments of the present invention are explained in more detail below with reference to drawings. They show:

Fig. 1

a highly simplified representation of a typical fire brigade situation when fighting a fire;

Fig. 2

a highly simplified schematic representation of a control device according to the present invention;

Fig. 3

a highly simplified schematic representation of the area of the communication bridge between the extinguishing nozzle and the display provided in the firefighter's helmet;

Fig. 4

a highly simplified schematic representation of the use of a multi-way switching valve in the switching position for pumping extinguishing fluid from the tank ( Fig. 4a ) and in the switching position delivery of extinguishing fluid via the stationary extinguishing fluid source ( Fig. 4b ), as well as

Fig. 5

a highly simplified schematic representation of the display in the display carried by the firefighter.

Fig. 1 shows a typical fire service situation when fighting a fire that has broken out in the basement of a building. After the fire engine 1 arrives, a firefighter goes into the basement of the building with the hose 3 and releases extinguishing fluid via the extinguishing nozzle 4 to immediately fight the fire. The extinguishing fluid is drawn from a tank in the fire engine 1. This makes it possible to start fighting the source of the fire immediately after the fire engine 1 arrives. At the same time, other firefighters search the area for an unlimited source of extinguishing fluid 2, such as a hydrant, a lake 27 or a watercourse. This can take a considerable amount of time. As soon as an unlimited source of extinguishing fluid has been found, it is connected to the fire engine 1 via a supply line. The hose 3 located at the source of the fire can then be supplied with extinguishing fluid from the unlimited source of extinguishing fluid.

For fire fighting, a fire engine 1 is usually equipped with several hoses, which can be used simultaneously if required. Fig. 1 For the sake of clarity, only a second hose with a fire extinguishing nozzle at the end is shown. This fire extinguishing nozzle is operated by another firefighter.

To fight a fire, the firefighter can manually adjust the extinguishing nozzle 4 so that the extinguishing fluid releases the extinguishing nozzle 4 with a small opening angle. This allows maximum extinguishing effect on the source of the fire to be achieved. However, if the source of the fire spreads despite firefighting and threatens the firefighter, the firefighter can manually adjust the extinguishing nozzle 4 so that the extinguishing fluid releases the extinguishing nozzle 4 with a very large opening angle. This allows the firefighter to protect themselves from fire and/or high heat and to leave the building safely. Both operating modes of the extinguishing nozzle 4 are available in Fig. 1 shown schematically. If there is an unexpected interruption in the supply of extinguishing fluid, the firefighter can suddenly find himself in a life-threatening situation because he can no longer release extinguishing fluid with a very large opening angle to protect himself.

Fig. 2 shows a simplified schematic diagram of the control device of the fire extinguishing system according to the invention. The components surrounded by the dashed line are preferably located in the area of the fire extinguishing device, ie in the area of the fire engine 1. The components include a controller 11 with a plurality of control and/or signal lines (dotted lines) that are connected to different functional components of the overall system. In particular, the tank 8 for providing extinguishing fluid directly on the fire engine 1 is shown. The tank 8 is connected to the feed pump 5, e.g. a centrifugal pump, via a first feed line 7.

In addition, a second supply line 9 is provided, which is connected to a supply line and supplies the feed pump 5 with extinguishing fluid from the stationary extinguishing fluid source 2.

The first supply line 7 and the second supply line 9 open into a preferably pressure-controlled multi-way valve 10 which is connected upstream of the feed pump 5. The multi-way valve 10 thus ensures, depending on the pressure at the second supply line 9, a switchover of the flow to the feed pump 5 from the tank 8 to the stationary extinguishing fluid source 2. The pressure control 30 of the multi-way valve 10 is in Fig. 2 only shown schematically.

The hose 3, at the end of which is a portable extinguishing nozzle 4, is supplied with extinguishing fluid via the feed pump 5. For the sake of clarity, only a single additional hose with extinguishing nozzle is Fig. 2 However, depending on requirements, a plurality of extinguishing nozzles and associated hoses, which are supplied with extinguishing fluid via the feed pump 5, can also be provided. In the area of each supply line to the extinguishing nozzle there is a valve 31, 32, which is each connected to the controller 11 via a control and/or signal line and can be actuated via the controller 11.

The output of the feed pump 5 is also connected to a return line 33, via which, also controlled by a valve 34 connected to the controller 11, extinguishing fluid from the stationary extinguishing fluid source 2 can be returned to the tank 8 in order to refill it.

The reference number 29 designates a device for controlling the feed pump or a so-called "pressure governor". This is able to adapt the pump output to the required output quantities of extinguishing fluid. If, for example, a pressure drop is caused by putting another hose or another extinguishing nozzle into operation, the device 29 for controlling the feed pump controls the pump output in such a way that the latter is increased in order to adapt the feed pressure of extinguishing fluid in the respective hose back to the previous level.

Reference number 26 in Fig. 2 denotes a further pump which is intended to determine the pressure conditions in the second supply line 9 from the stationary extinguishing fluid source 2 to the feed pump 5, provided that a non-pressurized extinguishing fluid source 2 has been found. The pump 26 is preferably a type of air pump or suction pump which is intended to influence the pressure conditions in the second supply line 9 in such a way that extinguishing fluid flows, for example, from a lower lake or watercourse via the supply line 9 to the multi-way valve 10 (which may also be higher up). The pressure conditions created by the pump 26 in the second supply line 9 at the inlet to the multi-way valve 10 are used to trigger the switching process of the same. This allows the control device to switch over automatically as soon as a local extinguishing fluid source 2 has been found and connected to the fire extinguishing device.

As from Fig. 2 As can be seen further, the controller 11 is connected via control line means 12 to a radio device 13 connected to the control line 12 in the area of the extinguishing nozzle 4. The control line means 12 can either be attached to the hose 3 on its sheath or can be integrated into the hose wall. The control line means 12 is preferably an electrical conductor for transmitting electrical signals, data and/or for supplying energy. The radio device is preferably a radio module for data transmission between transmitter and receiver over short distances, such as WPAN or WLAN. This type of radio transmission technology aims to preferably cover the working area around the radio device 13.

Furthermore, a radio device 14 is provided which is to be carried by the firefighter operating the extinguishing nozzle 4 and which is able to receive the radio signals 15 transmitted by the radio device 13 and to display them on a display 16, preferably in the form of a head-up display, which is to be carried by the firefighter operating the extinguishing nozzle 4. This only creates a very short transmission path for the data by radio directly in the working area of the firefighter, which is therefore much less susceptible to interference. Fig. 2 In the embodiment of the present invention shown, data transmission is carried out in only one direction, as is Fig. 2 visible direction arrow of the radio signals 15.

If the display 16, as in Fig. 2 , designed as a head-up display in the firefighter's helmet 6, this offers the firefighter on duty particularly good visibility with regard to information originating from the operations center, especially under often difficult viewing conditions, which are caused, for example, by poor lighting conditions, smoke, soot or the like.

To supply data to the radio device 13, a battery (not shown) can be provided on the extinguishing nozzle 4 or in the vicinity thereof. Alternatively, the radio device 13 can also be supplied with electrical energy via the control means 12 or via additional electrical energy-carrying lines (also not shown) which also run in or on the hose 3.

Preferably, the information displayed in the display 16 can be displayed, preferably simultaneously, in a display 17 of the fire extinguishing device or of the fire engine 1, so that the operator of the fire engine simultaneously sees the data or information transmitted to the firefighter at the extinguishing nozzle 4.

Fig. 3 shows a further embodiment of the communication bridge between the extinguishing nozzle 4 and the display 16. In this case, a data interface 18 can also be provided, which allows an additional cable connection to be made from the control line 12 to the display 16. For this purpose, at least one, preferably two plug contact connections 18a, 18b can be provided as the data interface 18. The additional data interface 18 serves only as a backup position in the event of an emergency.

The display 16 provided as a head-up display in the helmet 6 of the firefighter is connected via a (in Fig. 3 not shown) energy source, e.g. a rechargeable battery. The short radio transmission bridge according to the invention in the area of the extinguishing nozzle 4 makes it easy to provide additional data transmission via a communication cable 19 as a backup position.

In addition, in a further embodiment, the invention also makes it possible to set up a bidirectional data transmission between the first and second radio devices 13 and 14. Preferably, in addition to data for display in the display 16, voice files can also be transmitted from the firefighter operating the extinguishing nozzle 4 to the controller 11 and/or voice files from the firefighter on the controller 11 to the firefighter on the extinguishing nozzle 4.

The representation according to Fig. 4a shows the switching position of the multi-way valve 10 when the feed pump 5 is supplied with extinguishing fluid from the tank 8. The supply of extinguishing fluid from the tank 8 must be maintained until the feed pump 5 is supplied via a stationary extinguishing fluid source 2. Either a permanently installed hydrant 28 or a lake 27 or a stream, river or the like can be used for this.

If a hydrant 28 is present, the second inlet 9 of the feed pump 5 is connected to the connection of the hydrant 28. For example, fire-fighting water from a hydrant has a pressure of approx. 3 bar. After opening the hydrant 28, the fire-fighting water will thus be available at the multi-way valve 10 via the second supply line 9 at this pressure. The pressure causes the multi-way valve 10 to switch from the Fig. 4a in the in Fig. 4b shown switching position. Depending on requirements, it may be expedient for the pump 26 to adjust the pressure generated in the second inlet 9 to the required pressure or pressure range.

However, the pump 26 is particularly important when there is no hydrant 28, but only a body of water, such as a lake 27. In this case, it is often the case that the water surface of the lake is lower than the fire engine 1, so that by operating the pump 26, the pressure conditions in the second supply line 9 are influenced in such a way that the extinguishing water from the lake 27 can reach the feed pump 5 via the multi-way valve 10.

For pressure control 30 of the multi-way valve 10, an elastic element 25, e.g. a spring, can be provided, by means of which the multi-way valve 10 in the Fig. 4a shown switching position is kept pre-tensioned. Alternatively or additionally, a magnetic element (not shown) can also be provided for pressure control of the multi-way valve 10.

• der zeitaktuelle Füllstand 20 des Tanks 8 mit Löschfluid,
• die verbleibende Zeit 21 des Freisetzens von Löschfluid aus dem Tank 8,
• ein Zustandshinweis 22 in Bezug auf das Existieren einer Förderverbindung von Löschfluid von der ortsfesten Löschfluidquelle 2 zur Feuerlöscheinrichtung,
• ein Zustandshinweis 22 in Bezug auf das Nichtexistieren einer Förderverbindung von Löschfluid von der ortsfesten Löschfluidquelle 2 zur Feuerlöscheinrichtung,
• ein Zustandshinweis 23 in Bezug auf das Existieren und/oder Nichtexistieren einer Funkverbindung und/oder
• ein Alarmsignal 24 und/oder
• die Schaltstellung des Mehrwegeventils 10.

The representation in Fig. 5 The display 16, preferably a head-up display, in the firefighter’s helmet 6 shows the fire. The display 16 can be used to conveniently the following information may be reproduced individually or in any combination:

• the current filling level 20 of the tank 8 with extinguishing fluid,
• the remaining time 21 of the release of extinguishing fluid from the tank 8,
• a status indication 22 relating to the existence of a delivery connection of extinguishing fluid from the stationary extinguishing fluid source 2 to the fire extinguishing device,
• a status indication 22 relating to the non-existence of a delivery connection of extinguishing fluid from the stationary extinguishing fluid source 2 to the fire extinguishing device,
• a status indication 23 relating to the existence and/or non-existence of a radio connection and/or
• an alarm signal 24 and/or
• the switching position of the multi-way valve 10.

REFERENCE SYMBOL LIST

1

fire engine

2

stationary extinguishing fluid source

3

Hose

4

extinguishing nozzle

5

feed pump

6

helmet

7

first supply line

8

tank

9

second supply line

10

multi-way valve

11

controller

12

control line

13

first radio module

14

second radio module

15

radio signals

16

display

17

display

18

data interface

18a

plug-in connection

18b

plug-in connection

19

communication cable

20

current fill level

21

remaining time

22

condition indication conveyor connection

23

status indication radio connection

24

alarm signal

25

spring-elastic element

26

pump

27

lake

28

hydrant

29

feed pump control

30

pressure control

31

valve

32

valve

33

return line

34

valve

Claims (4)

1. Fire extinguishing system comprising a control device for operating the fire extinguishing system, wherein the control device comprises the following:

   a controller (11), which serves as an operations centre,

   wherein the first extinguishing system comprises the following:

   at least one hose (3) having an extinguishing nozzle (4) arranged at the end of the hose (3) and by means of which an extinguishing fluid conveyed under pressure can be released,

   a conveying pump (5) for conveying, under pressure, the extinguishing fluid in the hose (3) towards the extinguishing nozzle,

   a first supply line (7) to the conveying pump (5) from a tank (8) of a fire extinguishing device, in particular a fire engine (1),

   a second supply line (9) to the conveying pump (5) from a stationary extinguishing fluid source (2), wherein

   a multi-port valve (10) connected upstream of the conveying pump (5) is provided in the region of the first supply line (7) and second supply line (9),

   characterized in that

   the multi-port valve (10) is pressure-controlled,

   the multi-port valve (10) is connected to the controller (11) via control line means,

   the multi-port valve (10) can be controlled using the pressure prevailing at the multi-port valve (10) in the second supply line (9),

   the pressure prevailing at the multi-port valve (10) in the second supply line (9) can be determined using a pump (26), and

   the multi-port valve (10) switches over at a pressure threshold value and the pressure threshold value is adjustable.
2. Fire extinguishing system according to Claim 1, characterized in that there is a flow connection (basic position) between the tank (8) and the pump (5) in the loaded state of the multi-port valve (10).
3. Fire extinguishing system according to Claim 1 or 2, characterized in that the switching position of the multi-port valve (10) can be displayed.
4. Fire extinguishing system according to at least one of the preceding claims, characterized in that the multi-port valve (10) is a switching valve.

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