RU2743692C1 - Fire extinguishing system in an air filtration system and method of fire extinguishing in an air filtration system with a fire extinguishing system - Google Patents

Abstract

FIELD: fire extinguishing.

SUBSTANCE: group of inventions relates to an air filtration system with a fire extinguishing system, a fire extinguishing system in an air filtration system, a method of fire extinguishing in an air filtration system using a fire extinguishing system. The air filtration system with a fire extinguishing system includes at least: a prefilter; an electrostatic unit located in front of the filter unit including at least a charger and an electric filter; a ventilator; a filter unit including at least an adsorption catalytic filter and a precipitating filter; and a fire extinguishing system. The fire extinguishing system includes at least: two valves made configured to simultaneously close and localize the fire source, wherein one inlet valve is located before the filter unit and the second outlet valve is located after the filter unit; a spark arrester located between the electrostatic unit and the filter unit; control unit configured to receive signals and control the system elements; a fire detector located in the filter unit; fire extinguishing agent generator.

EFFECT: technical result consists in efficient and fireproof operation of the air filtration system with a fire extinguishing system due to the fire extinguishing system which provides precaution, prevention and elimination of fire in the air filtration system, and in prevention of the spread of flame in the ventilation system and beyond, and hence, in prevention an inside fire.

17 cl, 4 dwg

Description

Application area

The invention relates to the field of ventilation and fire extinguishing in air filtration systems, in particular to a fire extinguishing system located in an air filtration system and a fire extinguishing method.

State of the art

A technical solution is known from the prior art (RU 2676717 publ. 10.04.2016). The invention relates to a fire extinguishing system for a vehicle heating, ventilation and air conditioning (HVAC) system. The system monitors values from a collision sensor, values from a pressure sensor in the air conditioning system, engine coolant temperature, exhaust gas temperature, or an estimated engine load. The fire extinguishing system is switched on after the controller detects a certain combination of values of the monitored parameters. As a result, it is ensured that no refrigerant leaks into the engine compartment.

The disadvantage of such a system is that it is intended for a vehicle and is not applicable in stationary air filtration systems in rooms designed to clean the air from smoke, aerosols, dust, harmful substances and odors (including tobacco smoke), welding gases in systems exhaust ventilation and for cleaning and disinfecting air in recirculation systems of residential, public and industrial buildings.

Known automatic installation for fire extinguishing, humidification and air purification (RU 2455042 publ. 10.07.2012), automatic installation for fire extinguishing, humidification and air purification, including a supply pipeline, electric valves, a fire detection system, a control unit for electric valves, a fire pipeline connected to it devices of sprayed water, characterized in that a controller with programmed control for humidification and air purification, connected to a humidity sensor, is additionally connected to the electric valve control unit.

The disadvantages of such a system include the fact that it requires connection to the water supply system, as well as the fact that the fire is extinguished with the help of water, which is dangerous from the point of view of water getting into the electrical units of the installation.

A fire extinguishing system and an air purification system are known from the prior art (RU 94045901, publ. 27.02.1997). the fire extinguishing system and the air purification system provide a fire fighting installation having at least one spray or spray head associated with the controlled space. At least one spray head or spray is positioned upon activation to create suction through an opening in the air passage from the controlled space by spraying liquid in the form of small droplets, such as mist, into the air passage. The air channel communicates with at least one additional hole in the controlled space, so that at least one spray head in the air channel, the air channel, when activated, creates suction with a drain hole or spray nozzle to drain the liquid, and an impact device for exposing small drops and directing the affected drops into the sewer.

The main and significant disadvantage of such a system is that the activation of fire extinguishing occurs when the smoke sensor is triggered, thus, such a fire extinguishing system is not applicable in air filtration systems designed to clean the air from smoke, aerosols, dust, harmful substances and odors (including tobacco smoke), welding gases in exhaust ventilation systems and for cleaning and disinfecting air in recirculation systems of residential, public and industrial buildings.

Brief description of the invention

Air filtration system designed to clean air from smoke, aerosols, dust, harmful substances and odors (including tobacco smoke), welding gases in exhaust ventilation systems and for cleaning and disinfecting air in recirculation systems of residential, public and industrial buildings. During the operation of the air filtration system, in the absence of proper service, there were cases of fire in the filter unit, namely, ignition on precipitating filters and adsorption catalytic filters.

The objective of the invention is effective fire-safe cleaning and filtration of air from smoke, aerosols, dust, harmful substances and odors (including tobacco smoke), welding gases in exhaust ventilation systems and for cleaning and disinfecting air in recirculation systems of residential, public and industrial buildings.

The technical result of the invention "air filtration system with a fire extinguishing system" consists in the effective and fire-safe operation of the air filtration system with a fire extinguishing system due to the fire extinguishing system, which provides warning, prevention and elimination of ignition in the air filtration system, as well as preventing the spread of flame in the system ventilation and beyond and as a result - prevention of fire in the room.

The technical result is achieved in the invention according to paragraph 1 of the formula due to the fact that the air filtration system with a fire extinguishing system includes at least a prefilter, an electrostatic unit, a fan, a filter unit and a fire extinguishing system, including at least two valves, a spark extinguisher , control unit, fire detector, fire extinguishing agent generator.

It is possible to implement an air filtration system with a fire extinguishing system, in which one valve is located between the spark arrestor and the electrostatic unit, and the second valve is located at the outlet, after the filter unit.

It is possible to implement an air filtration system with a fire extinguishing system, in which the fire detector is located in the filter block.

It is possible to implement an air filtration system with a fire extinguishing system, in which the electrostatic unit consists of at least a charger and an electrostatic precipitator.

It is possible to implement an air filtration system with a fire extinguishing system, in which the filter unit consists of at least an adsorption-catalytic filter and a precipitating filter.

It is possible to implement an air filtration system with a fire extinguishing system, which additionally contains an automation unit.

It is possible to implement an air filtration system with a fire extinguishing system, which is designed to be installed in ventilation.

The technical result of the invention "fire extinguishing system in the air filtration system" is to prevent, prevent and eliminate ignition in the air filtration system, as well as to prevent the spread of flame in the ventilation system and beyond and, as a result, to prevent a fire in the room.

The technical result is achieved in the invention according to the independent paragraph 8 of the formula due to the fact that the fire extinguishing system in the air filtration system includes at least two valves, a spark extinguisher, a control unit, a fire detector, a fire extinguishing agent generator, while the control unit is configured to receive signals and control of system elements.

In this case, it is possible to implement a fire extinguishing system containing inlet and outlet valves.

It is possible to implement a fire extinguishing system in which the spark arrestor is made at least two-layer.

It is possible to implement a fire extinguishing system in which the spark arrestor is made of mesh.

It is possible to implement a fire extinguishing system, in which the control unit is configured to control the elements of the systems in a predetermined sequence.

It is possible to implement a fire extinguishing system, in which the control unit is configured to receive signals from the fire detector.

It is possible to implement a fire extinguishing system in which the fire detector is made of a braided wire.

It is possible to implement a fire extinguishing system, in which the fire detector consists of at least two electrical conductors and a tube made of polymer material.

It is possible to implement a fire extinguishing system, in which the fire extinguishing agent generator is made in the form of an aerosol capsule.

In addition, the fire extinguishing agent generator additionally contains a pyrocord and has the ability to be activated from the ignition of a pyrostatic cord.

The technical result of the invention "A method of fire extinguishing in an air filtration system using a fire extinguishing system" consists in effectively eliminating the fire and preventing the spread of flame in the ventilation system and beyond, and as a result, preventing a fire in the room.

The technical result is achieved by a fire extinguishing method in an air filtration system using a fire extinguishing system, which includes the following sequence of operations:

- determine the presence of a fire using a fire detector

- in case of fire, transmit a signal to the control unit,

- using the control unit, the valves are closed and the fan is turned off,

- transmit a signal to the fire extinguishing agent generator,

- activate the fire extinguishing agent generator and extinguish the fire with the fire extinguishing agent.

In this case, it is possible to achieve the claimed technical result by a fire extinguishing method in an air filtration system using a fire extinguishing system, in which a signal is transmitted from a fire detector to a control unit when the braid is melted and the electrical conductors are closed.

At the same time, it is possible to achieve the claimed technical result by a fire extinguishing method in an air filtration system using a fire extinguishing system, in which the fire extinguishing agent generator is activated 8-15 seconds after the valves are closed and the fan is turned off.

At the same time, it is possible to achieve the claimed technical result by a fire extinguishing method in an air filtration system using a fire extinguishing system, in which a fire extinguishing agent generator is activated using a control unit.

At the same time, it is possible to achieve the claimed technical result by a fire extinguishing method in an air filtration system using a fire extinguishing system, in which a fire extinguishing agent generator is activated by igniting a pyro cord

Description of drawings

Figure 1 shows an air filtration system (without a fire extinguishing system).

Figure 2 shows a fire extinguishing system.

Figure 3 shows an air filtration system with a fire extinguishing system.

Figure 4 is a block diagram of a method for extinguishing fire in an air filtration system using a fire extinguishing system.

Position 1 - prefilter

Position 2 - electrostatic unit

Position 3 - filter unit

Position 4 - inlet valve

Position 5 - outlet valve

Position 6 - spark arrester

Position 7 - control unit

Position 8 - fire detector

Position 9 - fire extinguishing agent generator

Position 10 - charger

Position 11 - electrostatic precipitator

Position 12 - adsorption catalytic filter

Position 13 - filter-precipitator

Position 14 - automation unit

Position 15 - fan

Position 16 - signal transmission from the fire detector to the control unit.

Position 17 - transmitting a signal from the control unit to the valves and the fan to turn off the fan and close the valves.

Position 18 - signal transmission from the control unit to the extinguishing agent generator.

Position 19 - activation of the extinguishing agent generator.

Position 20 - extinguishing fire extinguishing agent.

Position 21 - determination of the presence of fire.

Detailed description of the invention

An air filtration system with a fire extinguishing system includes at least:

prefilter 1 retains coarse dust and prevents dirt, fluff, wool and other contaminants from the supply ventilation system from entering the air filtration system, while it should be noted that such contaminating factors as, for example, fluff, wool, etc. can serve as initiators of ignition;

electrostatic unit 2, including a charger 10 and an electrostatic precipitator 11, serves to electrostatically charge mechanical pollutants, such as fine solid dust particles and the smallest liquid particles of the dispersed phase, that is, aerosols and bioaerosols passing through it, in addition, the electrostatic unit 2 produces ozone from oxygen entering it along with the air flow, thus, due to ozone produced from oxygen by the electrostatic unit 2 in bactericidal concentrations, inactivation of viruses, bacteria, and mold spores is ensured. In addition, the electrostatic precipitator 11 in the electrostatic unit 2 serves to filter (precipitate) solid particles and aerosols (coarse fractions), including oil and grease, that is, the electrostatic precipitator 11 provides an additional, preliminary filtration stage before the adsorption-catalytic filter 12 and the filter precipitator thirteen;

the fan 15 promotes the movement and suction of air into the air filtration system; as the fan 15, a radial fan or an axial fan can be used;

a filter unit 3, including an adsorption-catalytic filter 12 and a precipitator filter 13, serves to retain electrostatically charged mechanical pollutants in the electrostatic unit 2, such as fine solid dust particles and the smallest liquid particles of the dispersed phase, that is, aerosols and bioaerosols;

the automation unit 14 is used to turn on / off the air filtration system, as well as to control the elements of the system and its nodes;

fire extinguishing system, including:

The spark arrester 6 is made of metal or any other sufficiently rigid, non-combustible substance, the spark arrester 6 is located between the electrostatic unit 2 and the filter unit 3 and prevents the ingress of flammable particles into the filter unit 3, the spark arrester 6 can be mesh and at the same time two-layer, which helps to prevent ingress flammable particles into the filter unit 3, while the size of the mesh cell is selected based on the optimal ratio that provides a minimum pressure drop across the spark arrester and the maximum probability of preventing the ingress of flammable particles into the filter unit 3;

the inlet and outlet valves 4, 5 in the open state ensure the flow of air from the electrostatic unit 2 to the filter unit 3 and beyond. In the event of an ignition, the inlet and outlet valves 4, 5 are closed, which localizes the fire source and completely restricts air access to the fire site;

the fire detector 8 is made in the form of a fire detector and is a low-melting thermal cable in a protective sheath, that is, made of a braided wire, namely of two electrical conductors and a tube made of polymer material, for example, of polyethylene. The fire detector is located in the filter bank 3 along each of the filters 12 and 13 and is configured to transmit a signal 16 to the control unit 7, thus, the fire detector 8 detects precisely the ignition and does not react to such factors as smoke and or simply increased (not critical) temperature, which makes it possible to use the fire extinguishing system in air filtration systems designed to clean the air from smoke, aerosols, dust, harmful substances and odors (including tobacco smoke), welding gases in exhaust ventilation systems and for cleaning and disinfecting air in recirculation systems of residential, public and industrial buildings without false triggering of the fire extinguishing system. Thus, the fire detector 8 contributes to the prevention, prevention and elimination of ignition in the air filtration system, as well as to prevent the spread of flame in the ventilation system and beyond, and as a consequence - to prevent a fire in the room;

the fire extinguishing agent generator 9 can be made in the form of a capsule with a fire extinguishing aerosol. When the generator of the extinguishing agent 9 is activated, in the event of an ignition, an intense outflow of aerosol occurs, accompanied by a high combustion temperature of the active aerosol-forming substance, which leads to the elimination of the ignition, that is, the intensive outflow of the aerosol ensures the extinguishing of the fire and the elimination of the ignition. The fire extinguishing agent generator 9 is configured to be activated by detonating the electric igniter from an electric current signal with a strength of 0.1 mA. In addition, it additionally contains a pyrocord and has the ability to be activated from the fire of the pyrocord. This option is additional to protect against the failure of the fire detector 8, that is, due to the failure of the automatic fire extinguishing system. Thus, the fire extinguishing agent generator 9 contributes to the prevention, prevention and elimination of ignition in the air filtration system, as well as to prevent the spread of flame in the ventilation system and beyond and, as a result, to prevent a fire in the room;

the control unit 7 is able to receive signals from the elements of the system, in particular from the fire detector 8, and control the elements of the system for the effective and correct functioning of the fire extinguishing system in the air filtration system in order to prevent, prevent and eliminate ignition in the air filtration system, as well as to prevent the spread of flame in the ventilation system and beyond and as a result - prevention of fire in the room. For example, when a flame occurs in the filter unit 3, the fire detector 8 transmits a signal to the control unit 7, the control unit 7 controls the elements of the fire extinguishing system in a predetermined sequence in order to localize the fire source and eliminate the ignition. In this case, a predetermined sequence can be implemented in the control unit 7 as electromechanically using a time relay (a relay designed to create a definite time delay and ensure a certain sequence of operation of circuit elements. A time relay is used in cases when it is necessary to automatically perform some action not immediately after the appearance of the control signal, but after a set period of time), and programmatically using a microprocessor with a given program of the sequence of actions installed in the control unit 7;

Fire extinguishing in the air filtration system using a fire extinguishing system is carried out in the following way:

electrostatic unit 2, including a charger 10 and an electrostatic precipitator 11, provides electrostatic charging of mechanical pollutants, such as fine solid dust particles and the smallest liquid particles of the dispersed phase, that is, aerosols and bioaerosols, as well as the electrostatic precipitator 11 retains solid phase and aerosol particles (large fractions) , including oil and fat, while on the surfaces of the electrostatic precipitator 11, which is part of the electrostatic unit 2, the accumulation of grease-soot agglomerates and their ignition from the electric arc discharge is possible, which leads to separation from the surface of the electrostatic precipitator 11 and entrainment by the air flow into the block area filters 3. Ignited grease-soot agglomerate can ignite one of the filters of the filter unit 3, for example, a precipitating filter 13 or an adsorption-catalytic filter 12, that is, ignition / ignition occurs, as a result of which the fire detector 8, made, for example, in the form fire detector and which is a light a fusible thermal cable in a protective sheath, that is, made of a wire with a braid, namely from two electrical conductors and a tube made of polymer material, will detect the presence of fire 21 and transmit a signal 16 to the control unit 7, for example, due to the fact that the braid is melted and short circuit of a pair of electrical conductors. In addition to the cable, the fire detector can be activated in any other way, for example, using a temperature sensor.

The control unit 7 receives the signal from the fire detector 8 and transmits the signal 17 to valves 4 and 5 and the fan 15 and thus closes the inlet and outlet valves 4 and 5 and turns off the fan 15, thus localizing the fire source and limiting the access of air to the place of fire.

Further, after closing the inlet and outlet valves 4 and 5 and turning off the fan 15, a signal 18 is transmitted from the control unit 7 to the fire extinguishing agent generator 9, which can be made in the form of a capsule with a fire extinguishing aerosol, as a result of which the fire extinguishing agent generator 19 is activated and elimination of the fire 20, due to the intensive outflow of aerosol, providing extinguishing the fire and eliminating the ignition, which leads to the elimination of the ignition.

It is possible to implement a fire extinguishing method in an air filtration system using a fire extinguishing system, in which the activation of the 19 fire extinguishing agent generator 9 occurs 8-15 seconds after the valves are closed and the fan is turned off, which ensures the complete combustion of oxygen in a closed one by closing valves 4 and 5, system, that is, in the filter block 3 and the subsequent extinguishing of the ignition / fire due to the activation of the 19 fire extinguishing agent generator 9. At the same time, 8-15 seconds is the time range for which the complete combustion of oxygen occurs in a closed system with a given volume corresponding to the volume of the filter block 3 and the adjacent volume of the system closed by valves 4 and 5, and at the same time the range of time for which there is no significant propagation of the fire in the closed system.

It is possible to implement a fire extinguishing method in an air filtration system using a fire extinguishing system, in which a fire extinguishing agent generator is activated by igniting a pyro cord. Such an implementation of the method is useful if, for some reason, the fire extinguishing agent generator 9 from the fire detector 8 and the signal transmission from the control unit 7 did not operate, that is, due to the failure of the fire extinguishing system automation.

The fire extinguishing system in the air filtration system works as follows:

The filtration system cleans the air by passing it through the prefilter 1, which retains coarse dust and prevents dirt, fluff, wool and other pollutants from entering the air filtration system from the supply ventilation system, while it should be noted that such polluting factors such as down , wool, etc. can serve as initiators of ignition, then through the electrostatic unit 2, which includes a charger 10 and an electrostatic precipitator 11, which serves to electrostatically charge mechanical pollutants, such as fine solid dust particles and minute liquid particles of the dispersed phase, that is, aerosols and bioaerosols passing through through it, in addition, the electrostatic unit 2 produces ozone from the oxygen entering it along with the air flow, thus, due to the ozone produced from oxygen by the electrostatic unit 2 in bactericidal concentrations, inactivation of viruses, bacteria, and mold spores is ensured , and then the air enters the filter unit 3, including the adsorption-catalytic filter 12 and the filter-precipitator 13, serves to retain electrostatically charged mechanical pollutants in the electrostatic unit 2, such as fine solid dust particles and the smallest liquid particles of the dispersed phase, that is, aerosols and bioaerosols. At the same time, on the surfaces of the electrostatic precipitator 11, the accumulation of grease-soot agglomerates and their ignition from the electric arc discharge is possible, which leads to separation from the surface of the electrostatic precipitator and entrainment by the air flow into the area of the filter unit 3, but the spark arrester located between the electrostatic precipitator 11 and the filter unit 3 , retains on its surface a fat-soot agglomerate, including ignited and does not allow the penetration of flammable agglomerates through its surface and thus, due to its design, significantly reduces the likelihood of ignition in the filter block 3 of the filter-precipitator 13 and the adsorption-catalytic filter 12 at thus ensuring a minimum pressure drop. If, nevertheless, ignition occurs in the filter unit 3, the fire detector 8 is activated due to the fact that the braid is melted and the pair of electrical conductors is closed and then due to this, a signal 16 is transmitted to the control unit 7, while the fire detector 8 is located along of each of the filters of the filter unit 3 and thereby ensures the detection of fire at an early stage in any location of the filter unit 3. The control unit 7 receives the signal from the fire detector 8 and transmits the signal 17 to valves 4 and 5 and the fan 15 and thus closes the input and outlet valves 4 and 5 and shutdown of the fan 15, thus localizing the fire source and limiting the access of air to the fire site. Further, after closing the inlet and outlet valves 4 and 5 and turning off the fan 15, the signal 18 is transmitted from the control unit 7 to the fire extinguishing agent generator 9, which can be made in the form of a capsule with a fire extinguishing aerosol, as a result of which the fire extinguishing agent generator 19 is activated and the elimination of the fire, due to the intensive outflow of aerosol, which provides extinguishing the fire and eliminating the ignition, which leads to the elimination of the ignition, while the activation of the generator 19 of the extinguishing agent 9 can occur 8-15 seconds after the valves are closed and the fan is turned off, which ensures complete combustion oxygen in a closed, due to the closing of valves 4 and 5, the system, that is, in the filter block 3 and the subsequent extinguishing of the ignition / ignition due to the activation of the 19 fire extinguishing agent generator 9. At the same time, 8-15 seconds is the time range for which a complete combustion of oxygen in a closed system with a given volume, respectively corresponding to the volume of the filter block 3 and the adjacent volume of the system closed by valves 4 and 5, and at the same time the time range for which there is no significant spread of the fire in the closed system, thus the fire extinguishing aerosol completely eliminates the fire, while the time of complete extinguishing of the fire from the moment of the beginning of combustion filters in filter block 3 is no more than 3 minutes.

Thus, the fire extinguishing system in the air filtration system ensures the prevention, prevention and elimination of ignition in the air filtration system, as well as preventing the spread of flame in the ventilation system and beyond and, as a result, preventing a fire in the room due to the elements of the fire extinguishing system and their functionality and interaction with each other, the air filtration system, its elements and units.

At the same time, the design of the air filtration system with a fire extinguishing system ensures efficient and fire-safe operation of the air filtration system with a fire extinguishing system, due to the overall fire extinguishing system, which provides warning, prevention and elimination of ignition in the air filtration system, as well as in preventing the spread of flame in the system. ventilation and beyond and as a result - prevention of fire in the room, as well as due to the elements of the fire extinguishing system and elements of the air filtration system and their functionality and interaction with each other and among themselves.

The method of fire extinguishing in the air filtration system using a fire extinguishing system ensures effective elimination of fire and prevention of flame propagation in the ventilation system and beyond, and, as a consequence, prevention of a fire in the room.

Thus, a solution to the problem is provided, which consists in effective fire-safe cleaning and filtering of air from smoke, aerosols, dust, harmful substances and odors (including tobacco smoke), welding gases in exhaust ventilation systems and for cleaning and disinfecting air in residential recirculation systems. , public and industrial buildings.

Claims (38)

1. Air filtration system with a fire extinguishing system, including at least - prefilter, - an electrostatic unit located in front of the filter unit, including at least a charger and an electrostatic precipitator, - fan, - a filter unit comprising at least an adsorption catalytic filter and a precipitating filter, and fire extinguishing system including at least - two valves made with the possibility of their simultaneous closure and localization of the fire source, with one inlet valve located before the filter unit, and the second outlet valve located after the filter unit, - a spark arrester located between the electrostatic unit and the filter unit, - a control unit designed to receive signals and control system elements, - a fire detector located in the filter unit, - fire extinguishing agent generator. 2. An air filtration system with a fire extinguishing system according to claim 1, characterized in that it further comprises an automation unit. 3. An air filtration system with a fire extinguishing system according to claim 1, characterized in that it is configured to be installed in ventilation. 4. Fire extinguishing system in the air filtration system, including at least - two valves made with the possibility of their simultaneous closure and localization of the fire source, with one inlet valve located before the filter unit, and the second outlet valve located after the filter unit, - a spark arrester located between the electrostatic unit and the filter unit, - Control block, - a fire detector located in the filter unit, - fire extinguishing agent generator, the control unit is configured to receive signals and control system elements. 5. The fire extinguishing system according to claim 4, characterized in that the spark arrestor is made at least two-layer. 6. The fire extinguishing system according to claim 4, characterized in that the spark arrestor is made of mesh. 7. The fire extinguishing system according to claim 4, wherein the control unit is configured to control the system elements in a predetermined sequence. 8. The fire extinguishing system according to claim 4, wherein the control unit is configured to receive signals from the fire detector. 9. Fire extinguishing system according to claim 4, characterized in that the fire detector is made of a braided wire. 10. Fire extinguishing system according to claim 9, characterized in that the fire detector consists of at least two electrical conductors and a tube made of polymeric material. 11. The fire extinguishing system according to claim 4, characterized in that the fire extinguishing agent generator is made in the form of an aerosol capsule. 12. The fire extinguishing system according to claim 4, characterized in that the fire extinguishing agent generator further comprises a pyrocord. 13. A method of fire extinguishing in an air filtration system using a fire extinguishing system, including the following sequence of operations: - detecting the presence of a fire using a fire detector located in the filter unit, which retains mechanical contaminants electrostatically charged in the electrostatic unit that have passed through the spark arrestor located between the electrostatic unit and the filter unit, - in case of fire, transmit a signal to the control unit, - then, using the control unit, the inlet valve located before the filter unit and the outlet valve located at the outlet after the filter unit are closed, and the fan is turned off, - transmit a signal to the fire extinguishing agent generator, - activate the fire extinguishing agent generator and extinguish the fire with the fire extinguishing agent. 14. The method of fire extinguishing in the air filtration system according to claim 13, characterized in that the signal is transmitted from the fire detector to the control unit when the braid is melted and the electrical conductors are short-circuited. 15. A method of fire extinguishing in an air filtration system according to claim 13, characterized in that the fire extinguishing agent generator is activated 8-15 seconds after the valves are closed and the fan is turned off. 16. A method of fire extinguishing in an air filtration system according to claim 13, characterized in that the fire extinguishing agent generator is activated using a control unit. 17. The method of fire extinguishing in the air filtration system according to claim 13, characterized in that the fire extinguishing agent generator is activated by igniting the pyrocord.

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