KR101713232B1 - Commercial automatic fire extinguishing appratus - Google Patents

Abstract

A commercial automatic fire extinguishing system according to the present invention includes a plurality of temperature sensors 110 installed inside an exhaust structure (2, 3) formed above a cooking utensil (1) to sense a temperature; An extinguishing agent supply unit 170 for supplying an extinguishing agent for extinguishing a fire; A plurality of injection nozzles (130) installed inside the exhaust structures (2, 3) and connected to the extinguishing agent supply unit through a connection pipe, and spraying the extinguishing agent to be supplied; When the temperature sensed by at least one of the plurality of temperature sensors 110 exceeds a set first reference temperature, the controller controls the extinguishing agent from the extinguishing agent supply unit 170 to be injected through the injection nozzle 130 1. A commercial automatic fire extinguishing system comprising: a control unit (100)
Further comprising a manual button (101a, 101b) for inputting a command for injecting an extinguishing agent through the injection nozzle (130) from a user, wherein when the extinguishing agent is injected through the injection nozzle (130) The temperature sensed by each of the manual buttons 101a and 101b may be displayed on a display device provided in the control unit 100 by storing the sensed temperature in the memory and even when the extinguishing agent is injected by the injection command through the manual buttons 101a and 101b The display device displays that the injection command through the manual button is present.

Description

Commercial automatic fire extinguishing applet

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fire extinguishing system used in a kitchen of a commercial facility, and more particularly, to an automatic fire extinguishing system having a function of automatically extinguishing an extinguishing agent after detecting a fire or the like.

Under the current law, it is mandatory to install sprinklers, fire extinguishing equipment and automatic spreading fire extinguishers in kitchens of restaurants, multi-use shops, hotels, and dormitories.

However, in many cases of actual kitchen fires, the oil mist stored in the duct for the fire extinguisher installed on the upper part of the cooking cradle serves as a spreading or ignition medium of the fire, and the sprinkler or automatic spreading fire extinguisher can not suppress the fire in the duct .

Accordingly, in the prior art as disclosed in Patent Document 1, a fire suppressing device for monitoring the fire of the hood and the duct and automatically suppressing the fire by automatically injecting the extinguishing agent when the fire occurs is disclosed.

FIG. 1 is a view showing a configuration of a fire suppression device according to the prior art disclosed by Patent Document 1. FIG.

The fire suppression device includes a damper (32) capable of opening and closing the duct (30); A plurality of temperature sensing sensors 40 mounted on the hood 20; An injection nozzle 50 installed in the hood 20 and the duct 30; An extinguishing agent supply unit (60) filled with an extinguishing agent; A connection pipe 70 branched from the extinguishing agent supply unit 60 and connected to the injection nozzle 50; A plurality of open / close valves 80 respectively corresponding to the plurality of temperature detection sensors 40 for opening and closing the branched connection pipes 70; And a controller (90) for controlling the corresponding on / off valve (80) to be opened when the sensed temperature of the temperature sensor (40) of any one of the plurality of temperature sensors (40) ; ≪ / RTI >

In the conventional fire suppression apparatus, the temperature sensing sensors 40 are disposed apart from each other, the injection nozzles 50 mounted on the hood 20 are provided in the number corresponding to the temperature sensing sensor 40, The fire extinguishing agent valve 62 is disposed between the connection pipe 70 and the extinguishing agent supply part 60 and the control part 90 is connected to the injection nozzle 50, When the sensed temperature of any one of the temperature sensors 40 is equal to or higher than a predetermined second set temperature (the second set temperature < the first set temperature), the corresponding cooking device 10 To cut off the supply of electric power and shut off the gas supply and to close the duct through the damper 32. [

However, in a fire suppression device in general, malfunctions often occur in which an extinguishing agent is sprayed even though a fire has not actually occurred.

For example, if there is a malfunction of the opening / closing valve 80 or the extinguishing agent valve 62 or an abnormality in the temperature sensor 40 or the like, the extinguishing agent may be mistakenly sprayed. As a result, It may be that the temperature of the temperature sensor is raised above the set temperature so that the extinguishing agent is sprayed or the user may accidentally press the manual command button for extinguishing the extinguishing agent to spray the extinguishing agent.

In the case of such a malfunction or the like, it is possible to perform feedback such as maintenance or adjustment to the set temperature by analyzing the cause of malfunction or malfunction, but in the conventional fire suppression apparatus, It is very difficult to analyze.

On the other hand, when the conventional fire suppression device reaches a second set temperature lower than the first set temperature, measures for blocking gas and electricity are performed to prevent the occurrence of fire. However, in a place where cooking accompanied by high-temperature cooking or flame is required, the second set temperature itself is inevitably set high, so that the fire prevention effect is reduced. If so, there is a need to prevent the occurrence of fire in a more fundamental way.

The recognition of the problems and problems of the prior art is not obvious to a person having ordinary skill in the art, so that the inventive step of the present invention should not be judged based on the recognition based on such recognition I will reveal.

Korean Patent Laid-Open Publication No. 10-2013-0015056 'Fire Suppression Device' (Kang, Kho, published on February 13, 2013)

SUMMARY OF THE INVENTION An object of the present invention is to provide a commercial automatic fire extinguishing system equipped with means for easily analyzing the malfunction and the cause of malfunction.

Another object of the present invention is to provide a commercial automatic fire extinguishing system additionally provided with more fundamental fire prevention means.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

A commercial automatic fire extinguishing system according to one aspect of the present invention includes: a plurality of temperature sensors installed inside an exhaust structure formed above a cooking utensil to sense a temperature; A fire extinguishing agent supply unit for supplying fire extinguishing agent to suppress fire; A plurality of injection nozzles disposed inside the exhaust structure, connected to the extinguishing agent supply unit through a connection pipe, and spraying the extinguishing agent to be supplied; And a control unit for controlling the extinguishing agent from the extinguishing agent supply unit to be injected through the injection nozzle when a temperature sensed by at least one of the plurality of temperature sensors exceeds a set first reference temperature, In this case,

Further comprising a manual button for inputting an injection instruction of the extinguishing agent through the injection nozzle from the user, wherein when the extinguishing agent is injected through the injection nozzle, the temperature sensed by each of the plurality of temperature sensors is stored in the memory, And a display unit provided in the control unit. The display unit displays that the injection command is issued through the manual button, even when the extinguishing agent is injected by the injection command through the manual button.

In the above-described commercial automatic fire extinguishing system, the extinguishing agent supply unit may further include an on-off valve for opening and closing the supply of the extinguishing agent between the extinguishing agent supply unit and the connecting pipe. When the extinguishing agent is injected through the injection nozzle, Is stored together with the operating state of the second switch.

In the above-described commercial automatic fire extinguishing system, the plurality of temperature sensors and the plurality of injection nozzles are separately installed for at least two or more protection zones, and two or more temperature sensors and two or more injection nozzles are provided for each protection zone, Is separately irradiated by the protection zones.

In the above-described commercial automatic fire extinguishing system, the display device and the manual button are separately provided for each of the protection zones.

In the above-described commercial automatic fire extinguishing system, when the detected second reference temperature, which is sensed by using one of the plurality of temperature sensors, is higher than the first reference temperature, A gas circuit breaker provided in a gas supply line for supplying gas to the cooking apparatus is controlled to shut off the gas supply, and the damper installed in the exhaust structure is closed.

A commercial automatic fire extinguishing system according to one aspect of the present invention includes: a temperature sensor installed inside an exhaust structure formed above a cooking utensil and sensing a temperature; A fire extinguishing agent supply unit for supplying fire extinguishing agent to suppress fire; A spray nozzle installed inside the exhaust structure and connected to the extinguishing agent supply part through a connection pipe and spraying the extinguishing agent to be supplied; And a control unit for controlling the extinguishing agent from the extinguishing agent supply unit to be injected through the injection nozzle when the temperature sensed by the temperature sensor exceeds a set first reference temperature,

And a sensor for detecting an oil level, which is installed inside the exhaust structure and used to sense an oil stain, wherein the controller uses at least the oil level sensing sensor to use a notification means So that the user is notified.

In the above-described commercial automatic fire extinguishing system, the oil-sensing sensor may include a light-projecting element for projecting test light toward the light-transmitting window; And a light receiving element for receiving the test light reflected when the oil mist strikes the outside of the light projecting window.

In the above-described commercial automatic fire extinguishing system, the test light is ultraviolet light.

In the above-described commercial automatic fire extinguishing system, the oil-sensing sensor may be a hot-wire sensor for sensing a hot line generated from a heat source, and the control unit may include a third reference temperature- 3 reference temperature is lower than the first reference temperature, it is determined that the oil is caught when the amount of the heat ray sensed by the heat ray sensor is lower than a predetermined standard.

In the above-described commercial automatic fire extinguishing system, the hot-wire detecting sensor is characterized in that a plurality of hot-wire detecting elements for receiving hot-line through a light-transmitting window are arranged as an array.

In the above-described commercial automatic fire extinguishing system, when the detected temperature is higher than the second reference temperature, and the second reference temperature is lower than the first reference temperature, Wherein the controller is configured to control the gas breaker installed in the gas supply line for supplying the gas to shut off the gas supply, wherein the control unit variably sets the second reference temperature, wherein, when it is determined that the oil is fogged, And the second reference temperature is set to be lower.

According to one aspect of the present invention, when the fire extinguishing agent is sprayed even when no fire has actually occurred, it is possible to easily determine whether the fire extinguishing agent is sprayed on the basis of the temperature of each temperature sensor, It is possible to analyze the cause of the malfunction.

Further, according to one aspect of the present invention, there is an effect that it is possible to perform feedback such as maintenance such as replacement of parts or adjustment to set temperature easily by analyzing the cause of the malfunction.

In addition, since the grease accumulated in the exhaust structure such as the duct for the exhaust gas is a main ignition medium or diffusion medium of the fire, according to one aspect of the present invention, it is possible to inform the accumulation of grease more than a predetermined level early, And it is effective to prevent the kitchen fire.

FIG. 1 is a view showing a configuration of a fire suppression device according to the prior art disclosed by Patent Document 1. FIG.
FIG. 2 is a view showing the overall configuration of a commercial automatic fire extinguishing system according to an embodiment of the present invention.
3 is a view illustrating an example in which a temperature sensor and an injection nozzle are installed in a commercial automatic fire extinguishing system according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view showing two examples of a sensor for detecting oil level according to an embodiment of the present invention. 4 (A) and 4 (B) show the photocoupler type 120a, FIG. 4 (A) shows the case where no grease is stuck and FIG. 4 (D) is a shape of a hot-wire sensor 120b, and FIG. 4 (C) shows a case where no oil is caught and FIG. 4 (D) shows a case when oil is caught.
5 is a flowchart illustrating the main operation of a commercial automatic fire extinguishing system according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a method for determining oil spillage using a heat sensing device or the like according to an embodiment of the present invention. Referring to FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: FIG. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, parts not related to the description are omitted, and similar names and reference numerals are used for similar parts throughout the specification.

FIG. 2 is a view showing the overall configuration of a commercial automatic fire extinguishing apparatus according to an embodiment of the present invention.

A commercial automatic fire extinguishing system according to an embodiment of the present invention is provided in correspondence with a cooking apparatus 1 in a kitchen and includes a control unit 100, a temperature sensor 110, a sensor 120 for detecting oil level, 130, a damper 140, a gas alarm 150, a gas circuit breaker 160, and an extinguishing agent supply unit 170.

A plurality of temperature sensors 110 (110a and 110b) and a plurality of injection nozzles 130 (130a, 130b and 130c) and a plurality of temperature sensors 110a and 110b are provided in the hood 2 and the duct 3, A sensor 120 for detecting the oil level and a damper 140 are installed.

The plurality of temperature sensors 110 are provided inside the exhaust structures 2 and 3 formed above the cooking utensil 1 to sense the temperature and provide electrical signals to the control unit 100. For example, The hood 2 and the duct 3, respectively.

The plurality of injection nozzles 130 are installed in the inside of the exhaust structures 2 and 3 and are connected to the extinguishing agent supply unit 170 through a connection pipe and open / close valves 171 and 172 controlled by the control unit 100 The fire extinguishing agent is sprayed.

3 is a view illustrating an example in which a temperature sensor and an injection nozzle are installed in a commercial automatic fire extinguishing system according to an embodiment of the present invention.

The temperature sensor and the spray nozzle are installed in correspondence with various cooking utensils such as a fryer, a grill, an oven or a gas stove. At least one temperature sensor is installed in each of the hood and the duct, Or the number of the spray nozzles is set to match the number of the ducts.

A commercial automatic fire extinguishing system according to an embodiment of the present invention can perform sensing, control, and evolution by dividing into a plurality of protected areas, particularly two protected areas.

As shown in FIG. 3 (F) and FIG. 3 (G), a plurality of temperature sensors and a plurality of injection nozzles are separately provided for at least two or more protection zones, and two or more temperature sensors and two or more Nozzles are installed, and fire extinguishing agents can be separated and emitted in each protection zone.

2, the control unit 100 may include a display device (not shown) for displaying information, alarms, and alarms for each protected area, and an instruction to fire the extinguishing agent directly from the user to the control unit 100. [ Manual input buttons 101a and 101b, and an input button (not shown) for receiving a command or selection from the user, respectively.

A commercial automatic fire extinguishing system according to an embodiment of the present invention is provided with an injection nozzle, a temperature sensor, a display device, an input button, and a manual button separately for each protection zone. In particular, since manual buttons 101a and 101b are separately provided for each protection zone, when the fire generated in one side protection zone is suppressed during manual radiation of the fire extinguishing agent, the fire extinguishing agent can be prevented from being sprayed to other protection zones.

The damper 140 is installed in the middle of the duct 3 or in the middle of the exhaust structure and is controlled to be opened or closed by the control unit 100.

The gas alarm 150 senses the leaked gas and reports it to the control unit 100, and can also perform its own alarm or alarm through the control unit 100.

The gas circuit breaker 160 may block the gas line going to the cooking appliance 1 under the control of the controller 100. For example, when the gas detector 150 senses gas or the temperature sensor exceeds the set temperature The gas supply is cut off as it is detected.

The extinguishing agent supply unit 170 supplies the extinguishing agent for extinguishing the fire to the injection nozzle 130 through the connection pipe, and has an extinguishing agent tank for storing the extinguishing agent extinguishing agent in an accumulated pressure state.

In addition, the extinguishing agent supply unit 170 includes open / close valves 171 and 172 for opening / closing the supply of extinguishing agent to / from the connecting pipe, the first opening / closing valve 171 corresponding to the tanks, The first opening / closing valve 171 and / or the second opening / closing valve may be implemented as a solenoid valve or the like which is opened or closed under the control of the controller 100. [ Although only one connection pipe connected to the extinguishing agent supply unit 170 is shown in FIG. 2, a plurality of connection pipes may be connected.

The control unit 100 includes a display device (not shown) such as a lamp, an LED, or an LCD for displaying information, an alarm, and an alarm for each protected area, a speaker for outputting an alarm sound, Manual buttons 101a and 101b for inputting an instruction to fire the extinguishing agent directly from the user to the control unit 100, a memory for storing information, a microcomputer 101 for storing information, A controller or a microprocessor (not shown).

The control unit 100 may control the spraying nozzle 130 to spray the extinguishing agent from the extinguishing agent supply unit 170 when the temperature sensed by at least one of the plurality of temperature sensors 100 exceeds a set first reference temperature. And when the temperature detected by using one of the plurality of temperature sensors exceeds a set second reference temperature (the second reference temperature is a temperature lower than the first reference temperature), gas is supplied to the cooking apparatus 1 A gas shut-off device 160 installed in a gas supply line for shutting off the gas supply and controlling the damper 140 installed in the exhaust structure to be closed, and more detailed functions of the other control unit 100 will be described later .

The control unit 100 includes manual buttons 101a and 101b for inputting a command to fire a fire extinguishing agent from the user through the injection nozzle 130. When the position of the control unit 100 is adjacent to the fire occurrence area, It is possible to additionally provide a manual button at a position different from the manual button provided in the control unit 100 in consideration of a difficult situation. The control unit 100 is provided separately from the extinguishing agent supply unit 170, so that it is convenient for installation and maintenance.

5 is a flowchart illustrating the main operation of a commercial automatic fire extinguishing system according to an embodiment of the present invention.

The first reference temperature and the second reference temperature are set in the controller 100 when the commercial automatic fire extinguishing apparatus is manufactured or installed (S10), and the first reference temperature and the second reference temperature are changed .

When the temperature sensed by using one of the plurality of temperature sensors is lower than the second reference temperature (the second reference temperature < the first reference temperature &lt; RTI ID = 0.0 &gt; , The first alarm is issued using a display element and a speaker or the like and the gas breaker 160 provided in the gas supply line for supplying the gas to the cooking utensil 1 is controlled to cut off the gas supply, Controls the damper 140 installed in the exhaust structure and closes it, and controls the breaker such as the MCCB installed in the system for supplying electric power to the electric power for cooking (S12).

For example, the second reference temperature is a temperature for avoiding the occurrence of a fire, for example, about 60 캜, because it is determined that the possibility of overheating or fire of the cooker is high, although the fire has not yet occurred.

When the temperature sensed by the temperature sensor 110 exceeds the set first reference temperature during the monitoring of the temperature using the plurality of temperature sensors 110, the controller 100 controls the display device, (S14). In this case, the second alarm is issued and the fire extinguishing agent from the fire extinguishing agent supply unit 170 is sprayed through the injection nozzle 130 (S14). The first reference temperature is a temperature at which a fire is presumed to occur, for example, about 90 ° C.

When the extinguishing agent is injected through the injection nozzle 130, the control unit 100 stores the temperatures sensed by the plurality of temperature sensors and the operating states of the respective on-off valves together in the memory (S15) Are stored for each temperature sensor and for each opening / closing valve. When the fire extinguishing agent is injected into the display device according to a request according to the user's operation input, the temperature of each temperature sensor and the operation state of the on-off valve may be displayed (S16).

In addition, even when the extinguishing agent is injected by the injection command through the manual buttons 101a and 101b, the control unit 100 displays a command for injection through the manual button on the display element according to a request according to the user's operation input (Not shown).

According to one aspect of the present invention, when an extinguishing agent is sprayed even though no fire has actually occurred, based on information on the temperature of each temperature sensor, the operating state of each on-off valve, and whether or not the manual button is operated, It is possible to analyze the cause and cause of the malfunction.

For example, if the manual button is pressed by mistake, it can be confirmed immediately by displaying the injection command of the manual button. If the temperature of all the temperature sensors is normal but stored in a state in which the on / off valve 172 to the specific connection pipe is opened, a malfunction of the on / off valve 172 can be estimated. If the temperature of the specific temperature sensor is stored as exceeding the first reference temperature even though no fire has occurred, it is checked whether the failure of the temperature sensor or the heat from the cooking device below the temperature sensor is excessive can see.

According to an aspect of the present invention, by analyzing the cause of the malfunction, it is possible to easily perform maintenance such as replacement of parts or feedback such as adjustment to a set temperature.

The automatic fire extinguishing system according to an embodiment of the present invention further includes a sensor 120 for detecting the oil level, which is installed inside the exhaust structures 2 and 3 and used to sense oil stains, The controller 100 controls the user to notify the user using a notification means such as a speaker and / or a display device when using only the oil sensor 120 or using other sensors together.

FIG. 4 is a cross-sectional view showing two examples of a sensor for detecting oil level according to an embodiment of the present invention. 4 (A) and 4 (B) show the photocoupler type 120a, FIG. 4 (A) shows the case where no grease is stuck and FIG. 4 (D) is a shape of a hot-wire sensor 120b, and FIG. 4 (C) shows a case where no oil is caught and FIG. 4 (D) shows a case when oil is caught.

The sensor for detecting oil in the form of an optocoupler includes a light emitting element 121, a light receiving element 122 and a light projecting window 123. The light projecting element 121 projects test light toward the light transmitting window 123. [ The light receiving element 122 receives the test light reflected when the oil sump S is stuck outside the light transmitting window (see Fig. 4 (B)), and when the oil sealing window 123 is not oiled, (See FIG. 4 (A)), the amount of light received through the light-receiving element 122 is different when the oil is sandwiched and not sandwiched, Is detected.

Since the sensor for sensing the oil level in the form of the photocoupler 120a may be erroneously operated by disturbance light from the outside in addition to the test light generated in the self-light-transmissive element 121, three measures can be largely or selectively .

First, a kind of light with extremely low possibility of coming from the cooking apparatus, for example ultraviolet rays, can be used as the test light. The structure and mounting position of the photocoupler 122 can be set so that the possible light incident angle of the light receiving element 122 can not be directed toward the cooking utensil and is directed perpendicularly or upwardly to the direction of the cooking utensil. In addition, since it is not necessary to promptly report an oil-filled state, it is possible to filter the noise by a method of averaging a plurality of measurements at regular intervals.

The material of the light transmitting window 123 and the incident angle of the test light are set so as to minimize the amount of reflection of the test light by the light transmitting window 123 when the oil mist is not caught.

The sensor 120b for detecting the oil level of the heating wire sensor detects a heating wire (a light source by a heat source) generated from a heat source such as a cooking appliance. When the oil is not stuck, When the oil reaches the heating element 124, it detects that the oil is caught by using the point where the heating wire does not reach the heating element 124 or the amount of reaching the heating element 124 is small.

A plurality of hot-wire detecting devices 124 are arranged in an array in the hot-wire detecting sensor 120b, and a light-emitting device and a light-receiving device in the photocoupler 120a can be arranged in an array as well. A signal or a value may be averaged by an analog circuit or digital processing, or the like. The heat-sensing element 124 is preferably installed to face the cooking utensil.

According to an embodiment of the present invention, the controller 100 determines that oil is caught by using the heat sensing element and the temperature sensor.

FIG. 6 is a flowchart illustrating a method for determining oil spillage using a heat sensing device or the like according to an embodiment of the present invention. Referring to FIG.

First, the first reference temperature, the second reference temperature, and the third reference temperature are set in the controller 100 during the production or installation of the commercial automatic fire extinguishing system (S20), and these reference temperatures are changed And the first reference temperature and the second reference temperature are as described above. The third reference temperature is a temperature lower than the first reference temperature and the second reference temperature, and is a minimum temperature for detecting the occurrence of heat due to the use of a kitchen appliance, for example, about 50 캜.

The controller 100 determines whether the detected temperature exceeds the set third reference temperature using the temperature sensor 110 and the amount of the hot wire sensed by the hot wire sensor 120b is less than a predetermined standard (S21).

If the sensed temperature exceeds the third reference temperature and the amount of hot wire is less than the long reference value, it is determined that the user is oily, and the user is alerted by using an alarm means such as a speaker and / or a display device (S22) .

Meanwhile, the control unit 100 can variably set the second reference temperature, which is a criterion for shutting off the gas and electricity, and the damper. However, if it is determined that the oil is splashed as described above, The setting can be automatically changed so as to set the second reference temperature (or the first reference temperature) lower. The second reference temperature (and the first reference temperature) can be set higher again when the grease is removed by the oil cleaning. Accordingly, when the risk of fire increases due to the presence of grease, the reference temperature can be lowered to increase the prevention intensity against fire.

It is preferred that the profile of the sensor 120 for detecting the oil level is low in height, preferably in a relatively large area, and preferably has a heat-resistant material and a waterproof structure, and is provided with a guide for notifying that the user needs to clean the light- May be printed or attached.

According to one aspect of the present invention, since the oil accumulation accumulated in the exhaust structure such as the duct for the exhaust gas becomes a major ignition medium or diffusion medium of the fire, according to one aspect of the present invention, There is an effect that helps prevent the kitchen fire.

100: control unit 110: temperature sensor
120: Oil sensor 130: Injection nozzle
140: damper 150: gas detector
160: gas breaker 170: extinguishing agent supply unit

Claims (11)

A temperature sensor installed inside the hood or duct formed above the cooking utensil to sense the temperature;
A sensor for detecting the oil level installed inside the hood or the duct to sense oil stuck;
And a controller for controlling the gas circuit breaker installed on the gas supply line for supplying gas to the cooking utensil using the temperature sensed by the temperature sensor to shut off the gas supply,
Wherein,
Wherein the reference temperature (hereinafter, referred to as 'second reference temperature') for shutting off the gas supply is variably set. When it is determined that the oil is leaking using the leaning sensor, By automatically changing the setting so that the second reference temperature is set lower,
Wherein the self-extinguishing device is a self-extinguishing device. The method according to claim 1,
The oil-time detecting sensor is a hot-wire detecting sensor for detecting a hot line generated from a heat source,
Wherein,
The amount of hot wire sensed by the hot wire sensor is determined even though the temperature sensed by the temperature sensor is set to a third reference temperature and the third reference temperature is lower than the second reference temperature If it is below the standard,
Wherein the self-extinguishing device is a self-extinguishing device. The method according to claim 1,
The oil-
A light projecting element for projecting test light toward the light projecting window; And a light receiving element for receiving the test light reflected by the outer side of the light transmitting window when the oil mist is caught,
Wherein the test light is ultraviolet light. The method according to claim 1,
A fire extinguishing agent supply unit for supplying fire extinguishing agent to suppress fire;
And a plurality of spray nozzles disposed inside the hood or duct and connected to the extinguishing agent supply unit through a connection pipe and spraying the extinguishing agent to be supplied,
The plurality of temperature sensors are provided,
Wherein,
When the temperature sensed by the temperature sensor exceeds a set first reference temperature, and the first reference temperature is a temperature higher than the second reference temperature, an extinguishing agent from the extinguishing agent supply unit flows through the injection nozzle To control the injection,
Wherein the self-extinguishing device is a self-extinguishing device. The method according to claim 1,
Wherein the controller is configured to control the user to inform the user by using a notification means when it is determined that at least the oily state detection sensor is used,
Wherein the self-extinguishing device is a self-extinguishing device. The method of claim 4,
Further comprising: a manual button for inputting an injection instruction of the extinguishing agent through the injection nozzle from a user,
The temperature sensed by each of the temperature sensors may be stored in a memory when the extinguishing agent is injected through the injection nozzle, thereby being displayed on a display device provided in the control unit,
Wherein the display device displays an instruction to fire the manual button through the manual button even when the extinguishing agent is injected by the injection command through the manual button,
Wherein the self-extinguishing device is a self-extinguishing device. The method of claim 4,
The extinguishing agent supply unit includes:
And an opening / closing valve for opening / closing the supply of the extinguishing agent to / from the connecting pipe,
Closing valve when the extinguishing agent is injected through the injection nozzle,
Wherein the self-extinguishing device is a self-extinguishing device. The method of claim 4,
Wherein the plurality of temperature sensors and the plurality of injection nozzles are separately installed for at least two or more protection zones, wherein at least two temperature sensors and at least two injection nozzles are provided for each protection zone,
The fire extinguishing agent may be separately irradiated by the protection zones,
Wherein the self-extinguishing device is a self-extinguishing device. The method of claim 6,
Wherein the display device and the manual button are separately provided for each of the protection zones,
Wherein the self-extinguishing device is a self-extinguishing device.
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