KR20190001332A - APPARATUS AND METHOD FOR CONTROLLING Bi-FLOW RESPIRATORY - Google Patents

Abstract

Disclosed are an apparatus and a method for controlling a respirator. According to the present invention, it is possible to provide a clinically sufficient mixed gas to patients by controlling a flow rate of the mixed gas set according to inspiratory or exhaust power of the patients synchronously with an intake start timing of the patients. It is also possible to provide an optimum mixed gas to the patients by performing a proportional flow assist function that selectively sets an active intake flow rate to one of a direct proportion rate, an inverse proportion rate, or a fixed rate according to breathing power of the patients. In addition, by adding an active exhaust function which helps the patients′ exhaust state, it is possible to provide an optimum breathing to the patients until an exhausting effort of the patients is reduced.

Description

[0001] APPARATUS AND METHOD FOR CONTROLLING BI-FLOW RESPIRATORY [0002]

More particularly, the present invention relates to an apparatus and method for controlling a ventilator, and more particularly, to a ventilator control apparatus and method for controlling the ventilator using a ventilator, And to reduce the intake and exhaust days of the patient by controlling the flow rate and the flow rate.

Patients will receive respiratory care if they can not maintain proper breathing with their own breathing efforts. Mild patients will be treated with a low flow nasal cannula, and severe patients will be treated with a ventilator. However, non-invasive and effective treatment devices, which can be applied easily and with a constant flow rate, can be applied to moderate patients at the boundary between the two, by applying appropriate therapy and oxygen therapy to minimize the application of high-cost, low-efficiency mechanical ventilation. to be.

Recently, it is relatively easy to use and it is relatively easy to use. By supplying appropriately humidified air at a high flow rate, the nasal mucosa can be maintained more physiologically and less damaged, and the reduction of respiratory work, the ventilation of anatomical ducts and the optimization of lung elasticity , A nasal oxygen supply device for high-flow oxygen therapy for warming humidification has been developed and is increasingly used

Noninvasive nasal ventilation therapy is widely used because it has the advantage of increasing patient ventilation by using double high flow rate in non-invasive oxygen therapy which reduces patient's respiratory work and improves the digestion of the lungs.

This noninvasive nasogastric ventilator therapy is based on the fact that when a high flow rate of gas is injected through the nose, there is a slight positive pressure even during expiration due to the limited space of the nasal cavity. (Noninvasive positive pressure ventilation), which uses a nasal mask, a facial mask, and a helmet to perform breathing assisted breathing in the presence of unconsciousness.

For example, moderate hypoxic ventilatory failure is generally better than noninvasive positive ventilation in high-flow nasal ventilation, whereas non-invasive positive ventilation in hypercapnia respiratory failure is more effective than invasive positive ventilation It has been reported that lowering the intubation rate and lowering the mortality rate.

In spite of these advantages, however, in patients with hypoxic respiratory failure and hypercapnia respiratory failure, there is no appropriate treatment method, and invasive positive ventilation through intubation is the mainstay of treatment.

The present applicant has proposed a method of performing warm humidification ventilation using a double high flow rate in a non-intubating ventilator for therapeutic and respiratory aids for patients with respiratory insufficiency, (Bi-Flow) to reduce the patient's respiratory work and to provide clinically sufficient ventilation to the patient, and optionally to proportionally increase or decrease the degree of high flow according to the patient's respiratory days (in direct proportion, in inverse proportion or Proportional flow assist can be provided to the patient using a fixed approach and an active exhaust function to assist the patient's exhaust ventilation can be implemented to achieve an active deceleration of the flow rate until the patient's exhaust effort is reduced And the like.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a non-intubating ventilator which can increase the flow rate of the patient And to provide a ventilator control device and a control method thereof that can provide clinically sufficient ventilation to a patient.

It is a further object of the present invention to provide a patient with a proportional flow assist using a method of proportionally increasing or decreasing the degree of high flow rate (in direct proportion, inverse proportion or fixed) depending on the patient's respiratory days And a control method of the ventilator.

Yet another object of the present invention is to provide a control apparatus and control method for a ventilator which can perform active deceleration of a flow rate until exhaustion effort of a patient is reduced by adding an active exhaust function for assisting a patient's exhaust state It is in the cage.

According to a first aspect of the present invention, there is provided an apparatus for controlling a ventilator,

1. A ventilator control device for humidifying a gas mixture of air and high-pressure oxygen and delivering the ventilator to a patient through a canola,

An intake interrupter for controlling the mixed gas at an active flow rate set based on the inspiratory power of the patient when the mode is determined to be based on the mixed gas pressure of the canola in the active mode in which the patient's self-breathing is possible at the intake determination time; And

And an exhaust interrupter for controlling the flow rate of the mixed gas to the active exhaust flow rate set based on the exhaust power in the active mode at the exhaust judgment time based on the mixed gas pressure of the canola.

Preferably, the air-intake interrupting portion includes an initial operation module, which is supplied to the patient through the canola, with a predetermined amount of the mixed gas at a predetermined flow rate when power is supplied thereto; An inspiration judgment module for judging whether the intake start time is based on the pressure of the mixed gas of the canola; An active intake air flow rate setting module for calculating an intake air power and determining a predetermined active intake air flow rate corresponding to the calculated intake air power in the active mode in which self-breathing is possible at the start of intake; It can include an inspiratory flow rate control module that interrupts the flow rate and flow rate of the mixed gas according to the active inspiratory flow rate of the active inspiratory flow rate setting module. In the fixed mode in which self-breathing is impossible, the predetermined flow rate corresponding to the mixed gas pressure of the canola And a fixed intake flow rate setting module for setting the fixed intake flow rate to the fixed intake flow rate.

Preferably, the exhaust gas control unit includes an exhaust gas judgment module for judging whether the exhaust gas is started based on the mixed gas pressure of the canola; An active exhaust flow rate setting module for calculating the exhaust power in the active mode in which self-breathing is possible at the start of the exhaust as a result of the exhaust gas judgment module and determining the determined active exhaust flow rate corresponding to the calculated exhaust power; And an exhaust flow rate control module for controlling the flow rate and the flow rate of the mixed gas according to the active exhaust flow rate of the active exhaust flow rate setting module. In the fixed mode in which self-breathing is impossible, The flow rate and the flow rate of the mixed gas can be controlled at the flow rate.

According to another aspect of the present invention, there is provided a method for controlling a ventilator,

A control method of a ventilator for humidifying a gas mixture of air and high-pressure oxygen and delivering the same to a patient through a canola, the method comprising the steps of: when the cannula is in an active mode, An inspiratory control process for controlling the mixed gas at an active flow rate set based on the inspiratory power of the patient; And controlling the flow rate of the mixed gas to an active exhaust flow rate set based on the exhaust power in the active mode at the time of exhaust emission judgment based on the mixed gas pressure of the canola.

Preferably, the air entrainment control step includes an initial operation step of delivering a predetermined amount of the mixed gas to the patient through the canola when power is supplied thereto; An intake determination step of determining whether or not intake start timing is based on the pressure of the mixed gas of the canola; An active intake air flow rate setting step of calculating intake air power and determining a predetermined active intake air flow rate corresponding to the calculated intake air power in the case of an active mode in which self-breathing is possible at the intake start time as a result of the determination of the intake air determination step; And a flow rate control step of controlling the flow rate and flow rate of the mixed gas in accordance with the active intake flow rate of the active intake flow rate setting step. In the fixed mode in which self-breathing is impossible, the predetermined flow rate corresponding to the mixed gas pressure of the canola And setting the fixed intake air flow rate to the fixed intake air flow rate.

Preferably, the exhaust interrupting process includes determining an exhaust start timing based on the mixed gas pressure of the canola; An active exhaust flow rate setting step of calculating an exhaust power in the active mode in which the self-breathing is possible at the start of the exhaust as a result of the determination of the exhaust, and determining the determined active exhaust flow rate corresponding to the calculated exhaust power; And an exhaust flow rate control step of controlling the flow rate and the flow rate of the mixed gas according to the active exhaust flow rate of the active exhaust flow rate setting step. In the fixed mode in which self-breathing is not possible, The flow rate and the flow rate of the mixed gas can be controlled at the flow rate.

As described above, the ventilator control apparatus and the control method thereof according to the present invention can control the flow rate of the mixed gas set according to the intake or exhaust power of the patient in synchronization with the intake start timing of the patient, Gas can be provided to the patient, and optionally, an active intake flow rate is set to one of direct proportional, inverse proportional, or fixed proportional to the respiratory power of the patient to provide an optimal mixed gas to the patient And by adding an active exhaust function that helps the patient's exhaust condition, the active flow rate and the flow rate of the mixed gas can be actively decelerated until the exhaust effort of the patient is reduced to provide the optimum breathing to the patient I have.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given below, serve to further understand the technical idea of the invention. And should not be construed as limiting.
1 is a view showing a configuration of a control device of a ventilator according to an embodiment of the present invention.
FIG. 2 is a diagram showing a detailed configuration of an air intake interrupter of a control unit of the ventilator according to the embodiment of the present invention. FIG.
3 is a view showing a detailed configuration of an exhaust gas control part of a control unit of a ventilator control apparatus according to an embodiment of the present invention.
4 is a waveform diagram of each part of the controller of the ventilator according to the embodiment of the present invention.
5 is a flowchart illustrating a control process of the ventilator according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Brief Description of the Drawings The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described hereinafter with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. Also, as used herein, the term "part " refers to a hardware component such as software, FPGA or ASIC, and" part " However, "part" is not meant to be limited to software or hardware. "Part" may be configured to reside on an addressable storage medium and may be configured to play back one or more processors.

Thus, by way of example, and not limitation, "part (s) " refers to components such as software components, object oriented software components, class components and task components, and processes, Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays and variables. The functions provided in the components and "parts " may be combined into a smaller number of components and" parts " or further separated into additional components and "parts ".

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. In order to clearly explain the present invention in the drawings, parts not related to the description will be omitted.

Referring to FIG. 1, the ventilator according to an embodiment of the present invention includes a non-introducer (ventilator) S, The apparatus includes a mixed gas generating unit 100, a blower 200, a humidifying unit 300, and a humidifying unit 300. The humidifying unit 300, the humidifying unit 300, And a controller 400.

Here, the mixed gas generating unit 100 may perform a function of mixing the air in the air tank and the high-pressure oxygen in the high-pressure oxygen tank to generate a mixed gas, And a filter 112 for filtering the air of the indoor units 111.

The mixed gas generating unit 100 includes a pressure regulator 122 for discharging the high pressure oxygen of the high pressure oxygen tank 121 at a constant pressure and an oxygen flow rate control valve 123 for interrupting the flow rate of high pressure oxygen of the pressure regulator 122 ).

The mixed gas generating unit 100 may further include a mixing chamber 131 for mixing the high-pressure oxygen of the oxygen flow control valve 123 and the air of the filter 112 to generate a mixed gas.

The air supplied from the filter 112 and the high-pressure oxygen that has passed through the pressure regulator 1122 and the oxygen flow rate control valve 123 in the mixed gas generator 100 generate a mixed gas based on the mixing chamber 131 Since a series of processes have been filed by the present applicant, a detailed description thereof will be omitted. Then, the mixed gas is transferred to the humidifying unit 300 through the blower 200.

The humidifying unit 300 can transfer the mixed gas of the blower 200 including moisture heated by the heater 311 to the canola through the breathing hose through the humidifying chamber 312. A series of processes for transferring the mixed gas of the blower 200 including the moisture heated by the heater 311 to the canola through the breathing hose is also filed by the present applicant, The description is omitted.

Wherein the canola can include one of a nasal mask, a face mask, or a helmet that allows respiration through the patient ' s nose and is equipped with an evacuable vent hole.

Meanwhile, according to the present invention, the pressure of the mixed gas of the canola is detected, the flow rate of the mixed gas is increased according to the detected patient intake, and the flow rate of the mixed gas is reduced according to the patient exhaust, .

Accordingly, the control unit 400 can detect the pressure of the mixed gas of the canola, increase the flow rate of the mixed gas according to the detected patient intake, and reduce the flow rate of the mixed gas according to the patient exhaust.

FIG. 2 is a detailed view of the intake mode interrupter 410 of the control unit 400 shown in FIG. 1. FIG. 3 is a detailed view of the intake mode intermittent unit 410 of the controller 400 shown in FIG. Referring to FIGS. 2 and 3, the controller 400 is initially driven by a gas mixture having a predetermined reference flow rate when power is supplied, and then the inspiratory / An active interrupter 410 for controlling the gas mixture at an active flow rate based on the inspiratory power of the patient when the patient is in an active mode capable of self-breathing, And an exhaust interrupter 420 for controlling the flow rate of the mixed gas.

That is, the intake interrupter 410 is configured to control the flow of the mixed gas of the reference flow rate, which is predetermined when the power is supplied, from the initial operation module 411, which is delivered to the patient through the canola, (412) for calculating an intake air flow rate in the case of an active mode in which the self-breathing is possible at the intake start time as a result of the determination of the intake air intake module (412) An intake flow rate control module 414 for controlling the flow rate and the flow rate of the mixed gas of the mixed gas generating portion 100 according to the active intake flow rate of the active intake flow rate setting module 413, .

In addition, the intake interrupter 410 may further include a fixed intake flow rate setting module 415 for setting the predetermined amount of flow corresponding to the mixed gas pressure of the canola to the fixed intake flow rate in the fixed mode in which self-breathing is impossible.

3, the exhaust interrupting unit 420 includes an exhaust judgment module 421 for judging whether or not the exhaust gas is started based on the mixed gas pressure of the canola, An active exhaust flow rate setting module 422 for calculating the exhaust power and determining the determined active exhaust flow rate corresponding to the calculated exhaust power in the case of an active mode in which self-breathing is possible at the time of the active exhaust gas flow rate setting module 422, And an exhaust flow rate control module 423 for controlling the flow rate and the flow rate of the mixed gas in the mixed gas generating portion 100 according to the flow rate.

In the fixed mode in which the self-breathing is impossible, the exhaust gas control unit 420 can control the flow rate and the flow rate of the mixed gas of the mixed gas generating unit 100 at the reference flow rate set corresponding to the mixed gas pressure of the canola.

In other words, the initial operation module 411 of the present invention can provide the canola with the mixed gas having the predetermined reference flow rate when the respirator is powered, when the power is supplied to the ventilator, The gas pressure can be detected. The intake start timing can be determined based on the mixed gas of the mixed gas pressure of the received canola and the predetermined reference flow rate.

Then, the active flow rate setting module 413 can calculate the intake power according to the self-breathing of the patient in synchronization with the intake start timing, and set the active intake flow rate corresponding to the calculated intake power.

The intake flow rate control module 414 can provide the mixed gas of the set active intake flow rate to the patient in synchronism with the intake start timing.

If the self-breathing of the patient is impossible in the intake determination module 412, the fixed flow rate setting module 415 outputs the predetermined fixed intake flow rate, and the flow rate control module 414 controls the flow rate of the mixed gas of the fixed intake flow rate To the patient.

The exhaust judgment module 421 can judge the start time of exhaust emission based on the pressure of the mixed gas of the mixed gas pressure of the received canola and the predetermined reference flow rate.

The exhaust flow rate setting module 422 can calculate the exhaust power according to the self-breathing of the patient in synchronization with the start of the exhaust and set the active exhaust flow rate corresponding to the calculated exhaust power. The flow rate control module 423 can provide the mixed gas of the set active flow rate to the patient in synchronization with the start of the exhaust.

If the self-breathing of the patient is impossible in the exhaust determination module 421, the predetermined fixed exhaust flow rate may be set to the reference flow rate, and the mixed gas of the reference flow rate may be provided to the patient at the start of the exhaust stroke.

4 is a waveform chart showing the mixed gas pressure and flow rate of the patient according to the active intake flow rate and the active exhaust flow rate of the controller 400 shown in FIG. 1, and as shown in FIG. 4, As shown in (C), the pressure of the patient increases steadily at the intake start timing and decreases inversely at the exhaust start timing in accordance with the set flow rate of the mixed gas at the reference flow rate and the set active intake flow rate and the active exhaust flow rate of (B) . Therefore, according to the present invention, as the mixed gas is supplied to the patient at an optimal flow rate, the intake and exhaust days are reduced, and the patient's breathing is facilitated, thereby improving the therapeutic effect.

Since the conventional operation of the artificial respirator according to the present invention including the functions as described above is the same as or similar to that of the general artificial respirator, a detailed description thereof will be omitted.

On the other hand, the intake and exhaust start timing is detected based on the pressure fluctuation of the mixed gas supplied to the patient, and the intake air and the exhaust gas flow rate are set to the active intake flow rate and the active exhaust flow rate, A series of processes for interrupting the pressure will be described with reference to Fig.

FIG. 5 is a flowchart illustrating an operation process of the controller 400 shown in FIG. 1. Referring to FIG. 5, a control process of the ventilator according to another embodiment of the present invention will be described.

First, when the initial power is supplied to the ventilator S, the control unit 400 transmits the mixed gas having the predetermined reference flow rate to the canola and receives the pressure of the mixed gas of the canola (S1, S2).

At this time, if the inspiratory start time is a monitoring result of the mixed gas pressure, the control unit 400 calculates the intake power of the patient when the ventilator S is in the active mode in which the self-breathing of the patient is possible, The flow rate and the flow rate of the mixed gas can be controlled based on the intake flow rate (S3-S6).

Meanwhile, the control unit 400 can control the flow rate and the flow rate of the mixed gas at a predetermined fixed intake flow rate when the ventilator S is a stationary type in which the self-breathing of the patient is impossible (S7).

The control unit 400 determines whether or not it is the exhaust start timing. If the exhaust mode is the active mode, the control unit 400 calculates the exhaust power of the patient and determines the flow rate and flow rate of the mixed gas based on the active exhaust flow rate set corresponding to the calculated exhaust power. (S8-S11).

Meanwhile, if the patient is in a fixed mode in which self-breathing is impossible, the controller 400 may perform step S1 to control the flow rate and the flow rate of the mixed gas to a predetermined reference flow rate. This step S11 is repeatedly executed until exhaust is completed (S12).

According to the embodiment of the present invention, it is possible to provide a clinically sufficient mixed gas to the patient by controlling the flow rate of the mixed gas set in accordance with the intake or exhaust power of the patient in synchronism with the intake start timing of the patient, It is possible to provide an optimal mixed gas to a patient by performing an active flow assist function that sets the active intake flow rate to one of direct proportional, inverse proportional, or fixed one according to breathing power, Function can be added to perform an active deceleration of the flow rate and the flow rate of the mixed gas until the patient's exhaust effort is reduced, thereby providing the patient with optimal breathing.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

In this case, it is possible to provide a clinically sufficient mixed gas to the patient by controlling the flow rate of the mixed gas set according to the intake or exhaust power of the patient synchronously with the start of inspiration of the patient, and selectively provide the active inspiratory flow rate It is possible to provide optimal mixed gas to patient by performing active flow assist function which is set to one of direct proportional, inverse proportional, and fixed type. Further, active exhaust function for assisting patient's exhaust state is added, The performance and efficiency of the ventilator control system and method that can provide the optimum breathing to the patient by performing the active deceleration of the flow rate and the flow rate of the mixed gas until the decrease It can make great strides, and it is likely that the ventilator will be marketed or sold Since not only the degree to apparently conducted in reality the invention there is industrial applicability.

Claims (10)

1. A ventilator control device for humidifying a gas mixture of air and high-pressure oxygen and delivering the ventilator to a patient through a canola,
An intake interrupter for controlling the mixed gas at an active flow rate set based on the inspiratory power of the patient when the mode is determined to be based on the mixed gas pressure of the canola in the active mode in which the patient's self-breathing is possible at the intake determination time; And
And an exhaust interrupter for controlling the flow rate of the mixed gas to an active exhaust flow rate set based on the exhaust power in the active mode when the exhaust gas is judged based on the mixed gas pressure of the canola.
The air conditioner according to claim 1,
An initial operating module that is supplied to the patient through the canola with a predetermined reference flow rate of the mixed gas when the power is supplied;
An intake air judgment module for judging whether the intake start time is based on the pressure of the mixed gas of the canola;
An active intake air flow rate setting module for calculating an intake air power and determining a predetermined active intake air flow rate corresponding to the calculated intake air power in the active mode in which self-breathing is possible at the start of intake; And
And an intake air flow rate control module for interrupting the flow rate and the flow rate of the mixed gas according to the active intake air flow rate of the active intake air flow rate setting module.
The air conditioner according to claim 2,
Further comprising a fixed intake flow rate setting module for setting the predetermined flow rate corresponding to the mixed gas pressure of the canola to the fixed intake flow rate in a fixed mode in which self-breathing is not possible.
4. The exhaust gas recirculation device according to claim 3,
An exhaust judgment module for judging whether or not the exhaust gas is started based on the mixed gas pressure of the canola;
An active exhaust flow rate setting module for calculating the exhaust power in the active mode in which self-breathing is possible at the start of the exhaust as a result of the exhaust gas judgment module and determining the determined active exhaust flow rate corresponding to the calculated exhaust power; And
And an exhaust flow rate control module for controlling the flow rate and the flow rate of the mixed gas according to the active exhaust flow rate of the active exhaust flow rate setting module.
The exhaust gas recirculation device according to claim 4,
Wherein the controller controls the flow rate and the flow rate of the mixed gas to the reference flow rate set corresponding to the mixed gas pressure of the canola in the fixed mode in which self-breathing is impossible.
A control method for an artificial respirator for humidifying a gas mixture of air and high-pressure oxygen and delivering the gas to a patient through a canola,
An inhalation interrupting process for controlling the mixed gas at the active flow rate set based on the inspiratory power of the patient in the active mode in which the self-breathing of the patient is possible at the time of the inspiration determination, based on the mixed gas pressure of the canola, And
And controlling the flow rate of the mixed gas to the active exhaust flow rate set based on the exhaust power in the active mode when the exhaust gas is judged based on the mixed gas pressure of the canola.
7. The method according to claim 6,
An initial operation phase in which the mixed gas of the predetermined reference flow rate is supplied to the patient through the canola when power is supplied;
An intake determination step of determining whether or not intake start timing is based on the pressure of the mixed gas of the canola;
An active intake air flow rate setting step of calculating intake air power and determining a predetermined active intake air flow rate corresponding to the calculated intake air power in the case of an active mode in which self-breathing is possible at the intake start time as a result of the determination of the intake air determination step; And
And an intake flow rate control step of controlling the flow rate and the flow rate of the mixed gas in accordance with the active intake flow rate of the active intake flow rate setting step.
8. The method according to claim 7,
Further comprising a fixed intake flow rate setting step of setting a predetermined flow rate corresponding to the mixed gas pressure of the canola to the fixed intake flow rate in the fixed mode in which self-breathing is impossible.
9. The method according to claim 8,
An exhaust judgment step of judging whether or not the exhaust start time is based on the mixed gas pressure of the canola;
An active exhaust flow rate setting step of calculating an exhaust power in the active mode in which the self-breathing is possible at the start of the exhaust as a result of the determination of the exhaust, and determining the determined active exhaust flow rate corresponding to the calculated exhaust power; And
And an exhaust flow rate control step of interrupting the flow rate and the flow rate of the mixed gas according to the active exhaust flow rate of the active exhaust flow rate setting step.
12. The method according to claim 11,
Wherein the flow rate and the flow rate of the mixed gas are interrupted at the reference flow rate set corresponding to the mixed gas pressure of the canola when the self-extinguishing mode is a fixed mode.

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