Duct burner system for detecting fault location and preventing fire using multiple sensors

Abstract

A duct burner system having an abnormal location detection and fire prevention function using multiple sensors is a duct burner system that supplies hot air to a drying booth, comprising: an inlet duct module having air introduced at one end and a suction filter disposed at said one end to filter foreign substances contained in the air; a combustion duct module connected to the other end opposite to said one end of the inlet duct module, which generates hot air by combusting fuel supplied from a fuel supply pipe connected to an external fuel source and air introduced from said inlet duct module; a discharge duct module connecting said combustion duct module to a drying booth and including a fan unit that discharges the hot air to said drying booth and a discharge filter that filters foreign substances contained in the hot air; and a sensor module including a first sensor unit that measures the air pressure of said inlet duct module, a second sensor unit that detects the air flow moving from said inlet duct module to the combustion duct module, a third sensor unit that detects the operating state of said fan unit, and a fourth sensor unit that measures the air pressure of said discharge duct module. It includes a control unit that combines a plurality of sensor values ​​measured from the sensor module to distinguish and determine an abnormal state and the location of the abnormal occurrence, and controls the operation of the duct burner system.

Description

Technology Field

[0001] The present invention relates to a duct burner system having an abnormal location detection and fire prevention function using multiple sensors. Background Technology

[0002] Duct burner systems, generally applied to paint booths or drying facilities, are widely used as devices that dry painted products by introducing external or circulating air, mixing and burning it with fuel, and then supplying the generated hot air to the paint booth or drying facility through ducts.

[0003] These duct burner systems operate by transferring thermal energy generated through combustion to the air to create hot air, and supplying it while maintaining it at the temperature required for the process.

[0004] Registered Patent No. 10-0515776, Hot Air Supply Device for a Painting Booth (Registration Date: September 12, 2005), discloses a technology comprising a main body (2) forming an air passage toward a painting booth, a blower (5) supplying air through the main body (2), and a burner (1) heating air inside the main body (2), wherein the technology generates hot air of a uniform temperature by directly heating the air by the combustion heat of the burner (1) and then passing it through a catalyst means (8) and a heat exchanger (3) to supply it to the painting booth.

[0005] In particular, the catalyst means (8) includes an outer body (8a) and a plurality of contact members (8b), and a platinum plating layer (8c) is formed on the contact members (8b) to remove harmful gases contained in the hot air, thereby preventing the problem of harmful gases igniting and exploding due to the hot air with high temperature.

[0006] In addition, registered patent No. 10-2574983 (registration date: August 31, 2023) discloses a burner device that is installed inside a duct (110) through which a fluid passes and generates thermal energy to heat the fluid.

[0007] The burner device includes a main body (120) spaced apart from the inside of a duct, a fuel injection member (130) that injects fuel into the inside of the main body, a fresh air supply unit (200) that supplies fresh air for combustion of fuel, and an overheating prevention unit (300) that prevents the duct from overheating due to a flame formed by combustion.

[0008] In particular, the control unit (600) can prevent the problem of fire caused by overheating by controlling the operation of the compressed air injection member based on information detected through the first information detection member (630) that detects the flow rate or velocity of the fluid passing through the duct and the second information detection member (650) that detects the temperature of the inner wall of the duct.

[0009] However, the above devices include technologies to reduce fire risk, such as improving the quality of hot air or preventing overheating of the duct through configurations such as catalytic means or overheating prevention parts, and while it is possible to detect whether an abnormality has occurred using a sensor, there is a problem that maintenance is difficult because it is not possible to specifically distinguish and determine where in the device the abnormality has occurred.

[0010] Consequently, when a malfunction occurs in the device, it is difficult to pinpoint the exact location of the problem, requiring the entire device to be inspected; this leads to increased maintenance time and reduced operational efficiency.

[0011] In addition, the state of the system may change abnormally due to various causes such as motor overload or filter clogging, and if this abnormal state persists, there is a problem that it may lead to overheating inside the duct or abnormal spread of flames, which could result in a fire. Prior art literature

[0012] Registered Patent No. 10-0515776, Hot air supply device for paint booth (Registration date: September 12, 2005) Registered Patent No. 10-2574983 Burner device (Registration date: August 31, 2023) The problem to be solved

[0013] The present invention provides a duct burner system having a fire prevention and abnormal location determination function using multiple sensors, which detects the presence or absence of abnormalities in the duct burner system in real time using multiple sensors, improves maintenance efficiency by preventing unnecessary overall inspections by combining sensor values ​​detected from multiple sensors to distinguish and determine the location of abnormalities, and prevents fire by rapidly detecting abnormal combustion conditions caused by motor overload, filter clogging, and abnormal air flow. means of solving the problem

[0014] As an embodiment, a duct burner system having an abnormal location detection and fire prevention function using multiple sensors is a duct burner system that supplies hot air to a drying booth, comprising: an inlet duct module having air introduced at one end and a suction filter disposed at the one end to filter foreign substances contained in the air; a combustion duct module connected to the other end opposite to the one end of the inlet duct module, which generates hot air by combusting fuel supplied from a fuel supply pipe connected to an external fuel source and air introduced from the inlet duct module; a discharge duct module connecting the combustion duct module to the drying booth and including a fan unit that discharges the hot air to the drying booth and a discharge filter that filters foreign substances contained in the hot air; and a sensor module including a first sensor unit that measures the air pressure of the inlet duct module, a second sensor unit that detects the air flow moving from the inlet duct module to the combustion duct module, a third sensor unit that detects the operating state of the fan unit, and a fourth sensor unit that measures the air pressure of the discharge duct module. It includes a control unit that combines a plurality of sensor values ​​measured from the sensor module to distinguish and determine an abnormal state and the location of the abnormal occurrence, and controls the operation of the duct burner system.

[0015] The combustion duct module of the duct burner system includes a first combustion chamber in which combustion takes place by arranging a combustion unit including an igniter and a burner blower for air supply, and a second combustion chamber in which hot air supplied from the first combustion chamber is contained and communicated with the first combustion chamber.

[0016] The fan unit of the duct burner system comprises a fan, a motor driving the fan, and a belt pulley connecting the motor and the fan, and the third sensor unit is a rotational speed sensing sensor that detects the rotational speed of the belt pulley.

[0017] The second sensor unit of the duct burner system includes a movable member that rotates by the airflow moving from the inlet duct module to the combustion duct module, and a proximity sensor that detects a change in the position of the movable member.

[0018] The first sensor unit and the fourth sensor unit of the duct burner system are each differential pressure sensors that measure the differential pressure with respect to the reference pressure.

[0019] It further includes one shock application unit for applying a shock to the suction filter to remove foreign matter from the suction filter of the duct burner system, and another shock application unit for applying a shock to the discharge filter to remove foreign matter from the discharge filter.

[0020] The control unit of the duct burner system generates a control signal to stop the operation of the combustion duct module by determining that the intake filter is in a closed state when the sensor value measured by the first sensor unit decreases below a preset reference value and the second sensor unit detects a state where there is no airflow.

[0021] The control unit of the duct burner system generates a control signal to stop the operation of the combustion duct module by determining that the discharge filter is in a closed state when the sensor value measured by the fourth sensor unit increases above a preset reference value and the second sensor unit detects a state where there is no air flow.

[0022] The control unit of the duct burner system generates a control signal to stop the operation of the fan unit by determining that the fan unit is in an abnormal state when the sensor values ​​measured by the first sensor unit and the fourth sensor unit, respectively, are maintained within a preset range and the sensor value of the third sensor unit decreases below a preset reference value. Effects of the invention

[0023] The duct burner system having an abnormal location determination and fire prevention function using multiple sensors according to the present invention combines multiple sensor values ​​obtained through multiple sensors to determine not only whether there is an abnormality in the duct burner system but also the location where the abnormality occurs, thereby preventing unnecessary overall inspections and improving maintenance efficiency.

[0024] In addition, by detecting abnormal conditions such as motor overload, filter clogging, and airflow abnormalities at an early stage and controlling the system accordingly, it is possible to reduce the risk of fire, enable stable operation of the system, improve the reliability of the equipment, and ensure the safety of the working environment. Brief explanation of the drawing

[0025] FIG. 1 is a cross-sectional view showing a duct burner system having a fire prevention function according to an embodiment of the present invention. Figure 2 is a block diagram of a duct burner system having a fire prevention function as illustrated in Figure 1. Figure 3 is an enlarged view of section 'A' of Figure 1. FIG. 4 is a cross-sectional view illustrating another embodiment of a discharge filter of a duct burner system. FIG. 5 is a cross-sectional view showing a duct burner system having a fire prevention function according to another embodiment of the present invention. FIGS. 6 to 8 are flowcharts for explaining the control process of a control unit of a duct burner system having a fire prevention function according to an embodiment of the present invention. Specific details for implementing the invention

[0026] The present invention described below is capable of various modifications and may have various embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description.

[0027] However, this is not intended to limit the invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In describing the invention, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions may obscure the essence of the invention.

[0028] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0029] Additionally, terms such as "first," "second," etc., may be used to distinguish and describe various components, but said components shall not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another.

[0030] In addition, if at least two different embodiments are described in this application, each embodiment may use all or part of its components in combination and mixed with one another without further description, as long as it does not deviate from the technical spirit of the invention.

[0031] FIG. 1 is a cross-sectional view showing a duct burner system having a fire prevention function according to an embodiment of the present invention. FIG. 2 is a block diagram of the duct burner system having a fire prevention function shown in FIG. 1. FIG. 3 is an enlarged view of section 'A' of FIG. 1.

[0032] Referring to FIGS. 1 to 3, the drying booth (1) forms a three-dimensional space, and a painted product, such as an automobile part or an electronic product case, can be placed inside the drying booth (1).

[0033] The drying booth (1) is a space in which hot air is supplied so that the painted surface of a product placed inside can be dried quickly and uniformly, and can be formed so that the hot air supplied from the outside spreads evenly throughout the entire internal area. For example, the drying booth (1) can be formed with a structure in which hot air is introduced from one side of the drying booth (1) and air is discharged from the other side so that the flow of internal air has a certain directionality.

[0034] Meanwhile, the shape, size, and hot air flow structure of the drying booth (1) can be formed in various ways depending on the type of product being dried or the drying process conditions.

[0035] The duct burner system (10) generates high-temperature hot air by introducing external air or circulating air discharged from the drying booth (1), mixing fuel and air, and burning them, and supplies the generated hot air to the drying booth (1).

[0036] A duct burner system (10) of this type allows for a continuous process of air intake, combustion, and hot air discharge, thereby enabling a stable supply of hot air.

[0037] Meanwhile, although existing duct burner systems can detect whether an abnormality has occurred using sensors, they cannot specifically identify the location of the abnormality. Consequently, maintenance work requires shutting down the entire system and manually locating the site of the problem, which results in a problem where maintenance takes a long time.

[0038] To solve this, a duct burner system (10) according to one embodiment of the present invention detects the status of the duct burner system (10) in real time through a plurality of sensors, distinguishes and determines the location of an abnormal occurrence based on a combination of the plurality of sensor values, and controls it, thereby enabling safe operation of the system and reducing maintenance time.

[0039] To this end, the duct burner system (10) of the present invention includes an inlet duct module (100), a combustion duct module (200), a discharge duct module (300), a sensor module (400), and a control unit (500).

[0040] The inlet duct module (100) serves to draw in external air or circulating air and supply it to the combustion duct module (200) to be described later. In one embodiment of the present invention, the inlet duct module (100) may be formed in a duct shape or a tube shape having a hollow with both ends open.

[0041] External air is introduced through an opening formed at one end of the inlet duct module (100), and an intake filter (110) is disposed at one end of the inlet duct module (100) to filter dust, foreign substances, etc. contained in the inlet air.

[0042] The suction filter (110) is detachably coupled to one end of the inlet duct module (100), and the suction filter (110) prevents dust or foreign matter contained in the air from entering the inlet duct module (100) while allowing air to pass through smoothly.

[0043] In one embodiment of the present invention, the suction filter (110) may have a mesh structure that prevents dust or foreign substances from passing through but allows air to pass through.

[0044] Meanwhile, the interior of the inlet duct module (100) may include a blower unit (not shown) for sucking in external air or smoothly supplying it to the combustion duct module (200) to be described later.

[0045] The combustion duct module (200) is connected to the other end of the inlet duct module (100), and generates high-temperature hot air by mixing air delivered from the inlet duct module (100) with fuel supplied from a fuel supply pipe (2) connected to an external fuel source (not shown), such as gas, and then burning the mixture.

[0046] The combustion duct module (200) can be formed from a heat-resistant material so as not to cause deformation or damage even in a high-temperature combustion environment, and can have a constant volume and flow path structure so that combustion can be stably maintained inside.

[0047] The combustion duct module (200) includes a first combustion chamber (210) and a second combustion chamber (230).

[0048] The first combustion chamber (210) is a space where a mixture of supplied fuel and air is combusted, and a combustion unit (220) is disposed inside the first combustion chamber (210).

[0049] The combustion unit (220) generates high-temperature hot air by burning a mixed gas of fuel and air.

[0050] To this end, the combustion unit (220) includes an igniter (221) and a burner blower (222).

[0051] An igniter (221) is installed inside the first combustion chamber (210) and ignites a mixture of fuel and air to generate a flame.

[0052] In one embodiment of the present invention, the igniter (221) may include various ignition methods, such as an ignition method that generates a spark by operating on an electrical signal, a pilot burner method that maintains a small flame, and a thermal surface ignition method that ignites by heating a heating element.

[0053] The burner blower (222) supplies air introduced from the inlet duct module (100) to the combustion unit (220) to ensure smooth mixing with the fuel.

[0054] The burner blower (222) may include a blower driven by a motor, and the burner blower (222) supplies air of a constant flow rate and pressure into the combustion unit (220) to ensure smooth mixing of fuel and air.

[0055] The second combustion chamber (230) is connected to the first combustion chamber (210) and is a space into which hot air generated by the combustion unit (220) is introduced, and the hot air is homogenized while temporarily staying there before being delivered to the discharge duct module (300) to be described later.

[0056] The second combustion chamber (230) is formed to have a predetermined volume inside and serves as a buffer space to mitigate pressure fluctuations and flow irregularities occurring during the combustion process in the first combustion chamber (210) and to stabilize the flow of hot air.

[0057] Through this, the hot air generated from the combustion unit (220) is supplied to the discharge duct module (300) in a more uniform state, thereby improving the quality of the hot air supplied to the drying booth (1).

[0058] Meanwhile, one side of the second combustion chamber (230) is connected to the first combustion chamber (210), and the other side is connected to the discharge duct module (300), so that the generated hot air can be continuously delivered to the discharge duct module (300).

[0059] One side of the discharge duct module (300) is connected to the combustion duct module (200), and the other side opposite to the one side is connected to the drying booth (1), thereby connecting the combustion duct module (200) and the drying booth (1) to transfer the hot air generated from the combustion duct module (200) to the drying booth (1).

[0060] The discharge duct module (300) includes a fan unit (310) and a discharge filter (320).

[0061] The fan unit (310) includes a fan (311), a motor (312), and a belt pulley (313).

[0062] A fan (311) is placed inside a discharge duct module (300), and the fan (311) forms an airflow to flow high-temperature hot air generated from a combustion duct module (200) into a drying booth (1).

[0063] In one embodiment of the present invention, the fan (311) may be an impeller structure including a plurality of blades, and the fan (311) moves hot air along the discharge duct module (300) by rotating according to the driving of the motor (312).

[0064] The motor (312) is a driving source for rotating the fan (311) and converts electrical energy into rotational power to rotate the fan (311).

[0065] The motor (312) can be controlled to operate according to the control of the control unit (500) to be described later, and accordingly, the rotational speed and airflow of the fan (311) are adjusted.

[0066] The belt pulley (313) connects the rotation axis of the fan (311) and the rotation axis of the motor (312) to transmit rotational power.

[0067] In one embodiment of the present invention, the belt pulley (313) may include, for example, a motor pulley coupled to the rotational axis of a motor (312), a fan pulley coupled to the rotational axis of a fan (311), and a belt connecting the motor pulley and the fan pulley.

[0068] The belt of the belt pulley (313) rotates the fan (311) by transmitting the rotation of the motor pulley to the fan pulley.

[0069] A discharge filter (320) for filtering dust, foreign substances, etc. contained in the hot air is placed in an opening formed at the end where the discharge duct module (300) and the drying booth (1) are connected.

[0070] The discharge filter (320) is connected to the end where the discharge duct module (300) and the drying booth (1) are connected, and the discharge filter (320) filters dust, foreign substances, or by-products generated during the combustion process contained in the hot air so that clean hot air is supplied into the drying booth (1).

[0071] The discharge filter (320) is formed of a heat-resistant material to be durable even in a high-temperature hot air environment, and the discharge filter (320) can be formed with a mesh structure that filters out fine particles or foreign substances contained in the hot air.

[0072] FIG. 4 is a cross-sectional view illustrating another embodiment of a discharge filter.

[0073] Referring to FIG. 4, if the discharge filter (320) is damaged due to excessive pressure applied as various causes, such as dust or combustion by-products, accumulate in the discharge filter (320), a large amount of foreign matter may flow into the drying booth (1) and severely contaminate the drying booth (1).

[0074] To prevent this, the discharge filter (320) may further include a pleated portion (321) and a stitched portion (322) to prevent damage to the discharge filter (320).

[0075] The fold (321) is formed by folding the discharge filter (320) in a zigzag shape.

[0076] The stitch portion (322) is formed on the folded portion (321) in a zigzag shape. In the event that excessive pressure is applied to the discharge filter (320) and there is a possibility that the discharge filter (320) may be damaged, the stitch portion (322) breaks first to allow the folded portion (321) to unfold, thereby preventing the entire discharge filter (320) from being damaged.

[0077] Of course, if the stitching part (322) is damaged, it is desirable to replace the discharge filter (320) after stopping the operation of the duct burner system (10) because excessive pressure is applied to the discharge filter (320).

[0078] The stitch portion (322) can be formed, for example, by joining the opposing surfaces of the pleated portion (321) by adhesive force with a member having a certain adhesive force, or by sewing the pleated portion (321) with a member such as thread or wire.

[0079] Referring again to FIGS. 1 to 3, the sensor module (400) includes a plurality of sensor units, and the sensor module (400) measures physical quantities generated in the duct burner system (10), such as pressure, air flow, rotational speed, etc., and provides data for the control unit (500), which will be described later, to determine the state of the duct burner system (10).

[0080] In the present invention, the sensor value is a concept that includes a value corresponding to a physical quantity measured by each sensor unit of the sensor module (400), such as pressure, air flow, and rotational speed, or an electrical signal value generated based thereon.

[0081] The sensor module (400) includes a first sensor unit (410), a second sensor unit (420), a third sensor unit (430), and a fourth sensor unit (440).

[0082] The first sensor unit (410) measures the internal pressure of the inlet duct module (100) to determine the air inlet status of the inlet duct module (100).

[0083] In one embodiment of the present invention, the first sensor unit (410) may be a differential pressure sensor that measures the differential pressure between the internal pressure of the inlet duct module (100) and the atmospheric pressure.

[0084] The second sensor unit (420) detects whether there is a flow of air moving from the inlet duct module (100) to the combustion duct module (200) and determines whether there is an abnormality in the air flow.

[0085] The second sensor unit (420) may include a movable member (421) that rotates by airflow and a proximity sensor (422) that detects a change in the position of the movable member (421).

[0086] The second sensor unit (420) determines whether there is airflow by rotating the movable member (421) when airflow is present and returning the movable member (421) to its original position when airflow is not present, and detecting this by the proximity sensor (422).

[0087] Additionally, the second sensor unit (420) may measure not only the presence or absence of airflow but also changes in the state of airflow by detecting changes in the rotation angle or position of the movable member (421).

[0088] Although in one embodiment of the present invention, the second sensor unit (420) is shown and described as being positioned between the inlet duct module (100) and the combustion duct module (200), alternatively, the second sensor unit (420) may be positioned between the combustion duct module (200) and the discharge duct module (300) to determine whether there is air flow.

[0089] The third sensor unit (430) may be a rotational speed detection sensor that measures the rotational speed of the belt pulley (313), thereby determining whether there is an abnormality in the operation of the fan unit (310).

[0090] In one embodiment of the present invention, the third sensor unit (430) may be, for example, a tachometer, and may also include various sensors capable of detecting a rotational state, such as an encoder, a Hall sensor, a proximity sensor, and an optical sensor.

[0091] The fourth sensor unit (440) measures the internal pressure of the discharge duct module (300) to determine whether to discharge hot air.

[0092] In one embodiment of the present invention, the fourth sensor unit (440) may be a differential pressure sensor that measures the differential pressure between the internal pressure of the discharge duct module (300) and the atmospheric pressure.

[0093] Although in one embodiment of the present invention, the first and fourth sensor units (410, 440) are illustrated and described as differential pressure sensors that measure the pressure difference with atmospheric pressure, the first and fourth sensor units (410, 440) may otherwise be formed as various pressure measuring means, such as pressure sensors that measure absolute pressure or gauge pressure, or sensors that calculate a pressure difference using a plurality of pressure sensors.

[0094] Meanwhile, the sensor module (400) transmits sensor values ​​measured from a plurality of sensor units to a control unit (500) to be described later, and the control unit (500) can determine not only whether an abnormality has occurred in the duct burner system (10) but also the location of the abnormality in the duct burner system (10) by combining and analyzing the plurality of sensor values ​​transmitted from the sensor module (400).

[0095] The control unit (500) comprehensively determines the operating state of the duct burner system (10) by comparing and analyzing multiple sensor values ​​transmitted from the sensor module (400), and controls the operation of the duct burner system (10) accordingly. For example, the control unit (500) includes a microprocessor, memory, and an input / output interface.

[0096] The control unit (500) receives sensor values ​​measured from the first to fourth sensor units (410, 420, 430, 440), respectively, and compares and combines the measured sensor values ​​to determine the abnormal state and the location of the abnormal occurrence of the duct burner system (10).

[0097] In particular, the control unit (500) can determine the state of the duct burner system (10) more accurately and determine the location of the abnormality if an abnormality occurs by analyzing the correlation of multiple sensor values ​​without relying on a single sensor value.

[0098] Meanwhile, the control unit (500) may be configured to selectively control the operation of the combustion unit (220), fan unit (310), etc., according to the type and location of occurrence of the abnormality when an abnormality is detected in the duct burner system (10). For example, the control unit (500) may stop the combustion unit (220) or control the operation of the fan unit (310) in response to the abnormal state.

[0099] In addition, the control unit (500) can improve the safety of the system by promptly responding to an abnormal condition by outputting an alarm through an alarm unit (not shown) or sending a message to a terminal (not shown) held by an administrator when an abnormal condition occurs in the duct burner system (10).

[0100] FIG. 5 is a cross-sectional view showing a duct burner system having a fire prevention function according to another embodiment of the present invention.

[0101] The duct burner system (10) illustrated in FIG. 5 is substantially identical to the duct burner system (10) illustrated and described in FIG. 1 through 4, except for the shock application unit (600). Therefore, redundant descriptions of identical components are omitted, and identical components are given the same names and reference numerals.

[0102] Referring to FIG. 5, the duct burner system (10) may include an inlet duct module (100), a combustion duct module (200), a discharge duct module (300), a sensor module (400), a control unit (500), and an impact application unit (600).

[0103] The shock application unit (600) is positioned inside the intake duct module (100) or discharge duct module (300) corresponding to the intake filter (110) and discharge filter (320) and periodically applies a shock to the intake filter (110) and discharge filter (320) or applies a shock according to a control signal of the control unit (500) to shake off dust or foreign matter attached to the intake filter (110) and discharge filter (320) so that the air flow is maintained smoothly.

[0104] The shock application unit (600) includes, for example, a shock application member and an actuator that operates the shock application member.

[0105] The impact application member may be manufactured in a rod shape, etc., and the impact application member may be manufactured of a flexible material to prevent damage to the suction filter (110) or discharge filter (320).

[0106] Alternatively, the shock application unit (600) may include a vibration generating unit that periodically provides vibration to shake off dust instead of applying shock to the suction filter (110) or discharge filter (320).

[0107] Hereinafter, the control process of the control unit of a duct burner system having a fire prevention function will be explained with reference to FIGS. 1 to 8.

[0108] FIGS. 6 to 8 are flowcharts for explaining the control process of a control unit of a duct burner system having a fire prevention function according to an embodiment of the present invention.

[0109] Referring to FIGS. 1 to 8, the control unit (500) receives a plurality of sensor values ​​from the sensor module (400) and determines the operating state of the duct burner system (10) based on this.

[0110] First, referring to FIG. 6, the control unit (500) receives a sensor value corresponding to the pressure of the inlet duct module (100) from the first sensor unit (410) and detects whether there is air flow from the second sensor unit (420).

[0111] At this time, the control unit (500) can determine that the suction filter (110) is blocked or closed when the sensor value measured by the first sensor unit (410) decreases to a preset reference value or lower, and at the same time, the operating member (421) is detected by the proximity sensor (422) of the second sensor unit (420) and a state where there is no airflow is detected, as this is a state where air cannot flow into the intake duct module (100).

[0112] When the closed state of the suction filter (110) is determined in this manner, the control unit (500) outputs an alarm related to the blockage of the suction filter (110) through an alarm unit (not shown) or transmits a message regarding the blockage of the suction filter to a terminal (not shown) held by an administrator.

[0113] Next, the control unit (500) generates a control signal to stop the operation of the combustion duct module (200) to prevent overloading of the duct burner system (10).

[0114] Meanwhile, if an impact application unit (600) is placed in the duct burner system (10), the impact application unit (600) connected to the suction filter (110) may be operated to remove foreign matter attached to the suction filter (110).

[0115] Next, referring to FIG. 7, the control unit (500) receives a sensor value corresponding to the pressure of the discharge duct module (300) from the fourth sensor unit (440) and detects whether there is air flow through the second sensor unit (420).

[0116] At this time, the control unit (500) can determine that the discharge filter (320) is blocked or closed when the sensor value measured by the fourth sensor unit (440) increases above a preset reference value and simultaneously detects a state where there is no airflow by detecting a moving member (421) by the proximity sensor (422) of the second sensor unit (420).

[0117] When the closed state of the discharge filter (320) is determined in this manner, the control unit (500) outputs an alarm related to the clogging of the discharge filter (320) through an alarm unit (not shown) or transmits a message regarding the clogging state of the discharge filter (320) to a terminal (not shown) held by an administrator.

[0118] Next, the control unit (500) generates a control signal to stop the operation of the combustion duct module (200) to prevent overloading of the duct burner system (10).

[0119] Meanwhile, if an impact application unit (600) is placed in the duct burner system (10), the impact application unit (600) connected to the discharge filter (320) may be operated to remove foreign matter attached to the discharge filter (320).

[0120] Next, referring to FIG. 8, the control unit (500) receives sensor values ​​measured from the first sensor unit (410), the second sensor unit (420), and the fourth sensor unit (440), respectively, and detects the rotational state of the fan unit (310) through the third sensor unit (430).

[0121] At this time, the control unit (500) can determine that the fan unit (310) is in a state of failure, such as when the sensor values ​​measured by the first sensor unit (410) and the fourth sensor unit (440) do not change within a preset range, for example, when it is in equilibrium with atmospheric pressure and at the same time the movable member (421) is detected by the proximity sensor (422) of the second sensor unit (420) and a state where there is no airflow is detected, and the sensor values ​​measured by the third sensor unit (430) decrease to a state below a preset reference value, that the fan unit (310) is not operating normally due to a failure of the motor (312) or damage to the belt pulley (313).

[0122] When the failure state of the fan unit (310) is determined in this manner, the control unit (500) outputs an alarm related to the failure of the fan unit (310) through an alarm unit (not shown) or transmits a message regarding the failure state of the fan unit (310) to a terminal (not shown) held by an administrator.

[0123] Next, the control unit (500) can stop the operation of the duct burner system (10) by generating a control signal to stop the operation of the fan unit (310) and the combustion unit (220).

[0124] In this way, the control unit (500) can improve the efficiency of safe operation and maintenance of the duct burner system (10) by combining sensor values ​​obtained from the first to fourth sensor units (410, 420, 430, 440) to distinguish and determine not only the abnormal state of the duct burner system (10) but also the location where the abnormality occurred.

[0125] As described in detail above, the duct burner system having an abnormal location determination and fire prevention function using multiple sensors according to the present invention combines multiple sensor values ​​obtained through multiple sensors to determine not only whether there is an abnormality in the duct burner system but also the location where the abnormality occurs, thereby preventing unnecessary overall inspections and improving maintenance efficiency.

[0126] In addition, by detecting abnormal conditions such as motor overload, filter clogging, and airflow abnormalities at an early stage and controlling the system accordingly, it is possible to reduce the risk of fire, enable stable operation of the system, improve the reliability of the equipment, and ensure the safety of the working environment.

[0127] Meanwhile, the embodiments disclosed in this drawing are merely specific examples provided to aid understanding and are not intended to limit the scope of the invention. It is obvious to those skilled in the art that other variations based on the technical concept of the invention are possible in addition to the embodiments disclosed herein. Explanation of the symbols

[0128] 1...Drying booth 2...Fuel supply piping 10...Duct burner system 100...Inflow duct module 200...Combustion duct module 300...Discharge duct module 400...Sensor module 500...Control unit 600...Shock Is It Unit

Claims

Claim 1 A duct burner system for supplying hot air to a drying booth comprises: an inlet duct module having air introduced at one end and a suction filter disposed at the one end to filter foreign substances contained in the air; a combustion duct module connected to the other end opposite to the one end of the inlet duct module, which generates hot air by combusting fuel supplied from a fuel supply pipe connected to an external fuel source and air introduced from the inlet duct module; a discharge duct module connecting the combustion duct module to the drying booth and including a fan unit that discharges the hot air to the drying booth and a discharge filter that filters foreign substances contained in the hot air; and a sensor module including a first sensor unit for measuring the air pressure of the inlet duct module, a second sensor unit for detecting the air flow moving from the inlet duct module to the combustion duct module, a third sensor unit for detecting the operating state of the fan unit, and a fourth sensor unit for measuring the air pressure of the discharge duct module. A duct burner system comprising a control unit that combines a plurality of sensor values ​​measured from the sensor module to distinguish and determine an abnormal state and the location of the abnormal occurrence, and controls the operation of the duct burner system. Claim 2 In claim 1, the combustion duct module comprises a first combustion chamber in which combustion takes place by arranging a combustion unit including an igniter and a burner blower for air supply, and a second combustion chamber in which hot air supplied from the first combustion chamber is contained and communicated with the first combustion chamber. Claim 3 A duct burner system according to claim 1, wherein the fan unit comprises a fan, a motor driving the fan, and a belt pulley connecting the motor and the fan, and the third sensor unit is a rotational speed sensing sensor that detects the rotational speed of the belt pulley. Claim 4 A duct burner system according to claim 1, wherein the second sensor unit comprises a movable member that rotates by an airflow moving from the inlet duct module to the combustion duct module and a proximity sensor that detects a change in the position of the movable member. Claim 5 In claim 1, the duct burner system wherein the first sensor unit and the fourth sensor unit are each differential pressure sensors that measure the differential pressure with respect to a reference pressure. Claim 6 A duct burner system according to claim 1, further comprising one shock application unit for applying a shock to the suction filter to remove foreign matter from the suction filter and another shock application unit for applying a shock to the discharge filter to remove foreign matter from the discharge filter. Claim 7 A duct burner system according to claim 1, wherein the control unit generates a control signal to stop the operation of the combustion duct module by determining the closed state of the intake filter when the sensor value measured by the first sensor unit decreases to below a preset reference value and the second sensor unit detects a state where there is no air flow. Claim 8 A duct burner system according to claim 1, wherein the control unit generates a control signal to stop the operation of the combustion duct module by determining the discharge filter to be in a closed state when the sensor value measured by the fourth sensor unit increases above a preset reference value and the second sensor unit detects a state where there is no air flow. Claim 9 A duct burner system according to claim 1, wherein the control unit generates a control signal to stop the operation of the fan unit by determining an abnormal state of the fan unit when the sensor values ​​measured by the first sensor unit and the fourth sensor unit, respectively, are maintained within a preset range and the sensor value of the third sensor unit decreases below a preset reference value.

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