JP2007127324A - Combustor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a combustor and its control method limiting a cumulative execution time of a starting sequence such that it stays within a safety range even when starting and starting of the starting sequence are repeated within a short time. <P>SOLUTION: An operation time measuring means 33 and an operation time adding means 35 are provided for measuring and adding operation time of a fuel pump 26, an added operation time resetting means 36 is provided for returning an added operation time of the fuel pump 26 added by the operation time adding means 35 back to zero when combustion of fuel is detected by a combustion sensor 31, and a starting prohibiting means 37 is provided for prohibiting further starting of the fuel pump 26 when the added operation time of the fuel pump 26 added by the operation time adding means 35 exceeds a predetermined threshold value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is a combustor that uses liquid fuel such as kerosene, light oil, and heavy oil, and gaseous fuel such as propane and methane, and in particular, a large amount of raw (unburned) fuel stays in the combustion chamber due to repeated ignition failures. The present invention relates to a combustor provided with a safety device for preventing the occurrence of the failure.

  Combustors that use liquid fuels such as kerosene and light oil, and gaseous fuels such as propane and methane, are widely used as heat sources for home-use water heaters. A hot water heater provided with a combustor that uses this liquid / gas fuel is roughly configured as follows.

  That is, the water heater includes a can body, a water pipe disposed at an upper portion of the can body, a fuel injection nozzle disposed at a lower portion of the can body, a fuel supply means for supplying fuel to the fuel injection nozzle, An igniter in the vicinity of the injection port of the fuel injection nozzle, a combustion sensor that detects combustion of fuel at the injection port of the fuel injection nozzle, and a blower that blows air into the can body. The water pipe is a kind of heat exchanger, and feeds water from one end, and feeds water from the other end that has absorbed the heat of combustion of the fuel and has become hot.

When the user operates the start switch of the water heater, the water heater executes the following start sequence.
(1) First, the blower is activated. This is because unburned gas at the time of the previous operation stop may be accumulated inside the combustion chamber, so that these are excluded to prevent explosion ignition.
(2) Next, the igniter is energized. The igniter is a heater that heats and ignites the fuel injected from the fuel injection nozzle, and a suitable one such as a spark plug or nichrome heater is selected according to the type of fuel.
(3) The fuel supply means is activated to inject fuel from the fuel injection nozzle. When ignition is successful and the combustion sensor detects normal combustion of the fuel, the start-up sequence is terminated and control is transferred to the continuous operation sequence.

  If ignition is not successful even after the igniter is energized and fuel is injected for a predetermined period of time, the operation of the blower and fuel supply means is stopped and the energization of the igniter is also stopped. And wait for the next operation.

  When the “ignition failure” alarm is indicated, the user investigates the cause of the ignition failure and removes it or does nothing, and operates the start switch again to execute the above start sequence.

  Now, when ignition failure continues and the start-up sequence is repeated, the fuel injected from the fuel injection nozzle stays raw (unburned) in the can body, causing the following problems.

  If ignition is accidentally successful when the fuel staying in the can is vaporized and an explosive atmosphere is created, explosive combustion occurs and there is a risk of damaging the water heater. Alternatively, since a large amount of fuel burns at a time, soot and carbon monoxide gas may be generated due to lack of oxygen. In addition, a refractory is affixed to the inside of the can body, but if the fuel soaked in the refractory is ignited, the combustion cannot be controlled and the water heater may be damaged due to high temperatures. is there.

  Accordingly, various types of combustors have been proposed in which the number of ignition failures is counted, and when the number of failures reaches a predetermined number, the startup sequence cannot be executed thereafter.

  For example, Patent Document 1 discloses a fuel injection nozzle, a combustion control unit that controls combustion of the fuel injection nozzle, a combustion sensor that detects a combustion state of the fuel injection nozzle, and an ignition operation start of the fuel injection nozzle. If the combustion sensor does not detect combustion after a certain period of time, an abnormal stop circuit that stops the ignition operation, a manual reset means that resets this abnormal stop state and moves to the ignition operation again, and continuous occurrence of abnormal stop There is disclosed a control circuit for a combustor that includes an abnormality counter that counts the number of times, and is configured so that manual reset cannot be performed when the value of the abnormality counter exceeds a predetermined number of times.

  Further, in Patent Document 2, fuel is injected from a fuel injection device based on operation of an operation switch provided in an operation unit, and this is ignited and burned by an ignition device, and the presence or absence of a flame is detected by a flame detection sensor. An operation control method for a hot water heater that is configured as described above, and when the operation for fuel injection by the fuel injection device is repeated for a set number of times without detection of a flame thereafter, the hot water heater is disabled. An operation control method for a water heater is disclosed. In addition, according to the description of the embodiment, a case where a flame cannot be detected after 10 seconds from the start of the fuel supply means is regarded as an ignition failure and an alarm is displayed to prompt the user to re-operate the operation switch.

  Further, Patent Document 3 discloses an error count means for counting the number of times when ignition is not confirmed by the ignition detection means even though the ignition control means performs an ignition operation, and resets the ignition error. Ignition reset means for enabling re-ignition operation, special reset means provided separately from the ignition reset means for enabling re-ignition operation, and the ignition reset until the count value by the error count means reaches a predetermined number of times. An ignition control device is disclosed in which a reset by means is allowed and after a predetermined number of counts, a reset by special reset means is allowed and a reset by ignition reset means is not accepted.

Further, Patent Document 4 discloses an ignition control device for a water heater for igniting fuel in order to heat and burn incoming water to supply hot water, and ignition is performed at the time of ignition at the start of hot water supply. An ignition recycle counter that counts the number of ignition operations performed before and a flame extinguishing reignition counter that counts reignition operations performed to continue hot water supply when the flame is extinguished during hot water combustion are separately provided. An ignition control device for a hot water heater is disclosed in which a predetermined number of times is reached for each to shift to a safe operation as an ignition failure.
Japanese Patent No. 2748630 JP-A-8-312945 JP-A-9-280556 JP-A-11-2111080

  As described above, the inventions described in Patent Documents 1 to 4 limit the number of repetitions of the start-up sequence of the combustor, thereby preventing a large amount of unburned fuel from staying in the can. Although effective in preventing troubles such as explosions, there are the following problems.

  For maintenance of the water heater, a service person may adjust the start-up sequence while visually checking the combustion state. In such a case, a predetermined time elapses because the ignition failure can be immediately recognized visually. Before, the service person interrupts the startup sequence. If the start-up sequence is interrupted before the predetermined time elapses, the combustor control device does not recognize the ignition failure, and therefore cannot count the number of times the start-up sequence is repeated. Therefore, the service person can repeat the activation sequence indefinitely. Therefore, there is a problem that the human error that a large amount of unburned fuel stays inside the can cannot be eliminated by repeating the start-up sequence indiscriminately due to carelessness of the service person.

  Under such a background, the present invention provides a combustor capable of limiting the amount of fuel injected from the fuel injection nozzle so as to remain within a safe range even when the start and stop of the start sequence is repeated in a short time. An object is to provide a control method.

  A first configuration of a combustor according to the present invention includes a combustion chamber, a fuel injection nozzle installed in the combustion chamber, fuel supply means for supplying fuel to the fuel injection nozzle, and the fuel injection nozzle. An igniter that ignites the injected fuel, a combustion sensor that detects a combustion state of the fuel injected from the fuel injection nozzle, an ignition switch that activates the igniter and the fuel supply means, and the fuel supply means; A combustor comprising control means for controlling start and stop of the igniter, wherein the control means measures and integrates the operating time of the fuel supply means or the amount of fuel supplied to the fuel injection nozzle. Integration means; operating time of the fuel supply means (hereinafter referred to as “integration”) integrated by the measurement integration means when the combustion sensor detects normal combustion of the fuel injected from the fuel injection nozzle. The integrated operation resetting means for returning the supply amount (hereinafter referred to as “integrated supply amount”) to zero; and the integrated operation time or integrated supply amount of the fuel supply means integrated by the measurement integration means. A start prohibiting means for prohibiting subsequent start of the fuel supply means by the ignition switch when a predetermined threshold value is exceeded is provided.

  According to this configuration, the operation time of the fuel supply means or the supply amount of the fuel supplied to the fuel injection nozzle is integrated, and when the integrated operation time or the integrated supply amount exceeds a predetermined threshold, the subsequent ignition switch Since the start of the fuel supply means is prohibited, it is possible to prevent the unburned fuel from staying in the combustion chamber by repeating the start-up sequence. Here, “normal combustion” means continuous and stable combustion, and is intended to exclude intermittent combustion or a state that immediately disappears after ignition as “abnormal combustion”.

  Here, the fuel supply means is a means for supplying the fuel to the fuel injection nozzle and blocking the supply of the fuel freely. The operating time of the fuel supply means means that the fuel supply means supplies fuel to the fuel injection nozzle. Refers to the time during which the product is supplied. In a combustor that uses liquid fuel such as kerosene, a fuel pump that pressurizes kerosene or the like and pumps it to the fuel injection nozzle corresponds to the fuel supply means, and is suitable for a combustor that uses high-pressure gas such as propane. In this case, an electromagnetic valve or the like for opening and closing a pipe for supplying propane or the like to the fuel injection nozzle corresponds to the fuel supply means. Further, the elapsed time from the start to the stop of the fuel pump or the time during which the solenoid valve opens the pipe corresponds to the operating time of the fuel supply means.

  In a second configuration of the combustor according to the present invention, in the first configuration, the start prohibiting unit has an alarm displaying unit for displaying an alarm indicating that the start of the fuel supply unit is prohibited. It is characterized by.

  According to this configuration, since an alarm indicating that the activation of the fuel supply unit is prohibited is displayed, it is possible to easily recognize that the execution of the activation sequence is prohibited due to the excess of the accumulated operation time.

  According to a third configuration of the combustor according to the present invention, in the first or second configuration, the start prohibiting unit is configured such that an integrated operation time or an integrated supply amount of the fuel supply unit integrated by the measurement integration unit is When a predetermined threshold value is exceeded, subsequent activation of the igniter by the ignition switch is prohibited.

  According to this configuration, when the accumulated operation time or the accumulated supply amount exceeds the threshold, the start of the igniter is prohibited in addition to the fuel supply means, so that the unburned fuel staying in the combustion chamber is inadvertently ignited. Can be prevented.

  According to a fourth configuration of the combustor of the present invention, in any one of the first to third configurations, the control unit is configured such that after the fuel supply unit and the igniter are activated, the combustion sensor performs the fuel injection. And a start stopping means for temporarily stopping the operation of the fuel supply means and the igniter when a predetermined time has passed without detecting normal combustion of the fuel injected from the nozzle, and waiting for the operation of the ignition switch again. It is characterized by that.

  According to this configuration, after the fuel supply means and the igniter are started, when the predetermined time has passed without the combustion sensor detecting the combustion of the fuel injection nozzle, the operation of the fuel supply means and the igniter is temporarily stopped. It is possible to prevent the sequence from being continuously executed.

  According to a fifth configuration of the combustor of the present invention, in the fourth configuration, the start cancellation unit displays an alarm indicating that the operation of the fuel supply unit and the igniter has been temporarily stopped. It has an exit means.

  According to this configuration, an alarm indicating that the operation of the fuel supply unit and the igniter has been stopped is displayed, so that the user can easily understand that fact.

  A first configuration of a control method of a combustor according to the present invention includes a combustion chamber, a fuel injection nozzle installed toward the combustion chamber, fuel supply means for supplying fuel to the fuel injection nozzle, and the fuel An igniter that ignites fuel injected from the injection nozzle; a combustion sensor that detects a combustion state of the fuel injected from the fuel injection nozzle; an ignition switch that activates the igniter and the fuel supply means; and the fuel In a control method of a combustor comprising a supply means and a control means for controlling start and stop of the igniter, the operating time of the fuel supply means or the supply amount of fuel supplied to the fuel injection nozzle is measured and integrated. A measurement integration step; stopping the execution of the measurement integration step when the combustion sensor detects normal combustion of the fuel injected from the fuel injection nozzle; An integrated amount resetting step for returning the integrated value of the operating time of the charge supply means (hereinafter referred to as “integrated operating time”) or the integrated value of the supply amount (hereinafter referred to as “integrated supply amount”) to 0; A start prohibiting step for prohibiting subsequent start of the fuel supply means by the ignition switch when the integrated operation time or the integrated supply amount of the fuel supply means to be accumulated exceeds a predetermined threshold value. .

  According to a second configuration of the control method of the combustor according to the present invention, in the first configuration, the start prohibiting step displays an alarm indicating that the fuel supply unit is prohibited to the alarm display unit. It is characterized by.

  According to a third configuration of the method for controlling a combustor according to the present invention, in the first or second configuration, the start prohibiting step includes an integrated operation time or integrated supply of the fuel supply unit integrated by the measurement integration unit. When the amount exceeds the predetermined threshold value, the start of the igniter by the ignition switch is prohibited thereafter.

  According to a fourth configuration of the method for controlling a combustor according to the present invention, in any one of the first to third configurations, after the fuel supply means and the igniter are started, the combustion sensor is connected to the fuel injection nozzle. A start stopping step of temporarily stopping the operation of the fuel supply means and the igniter and waiting for the operation of the ignition switch again when a predetermined time has passed without detecting normal combustion of the injected fuel; Features.

  According to a fifth configuration of the method for controlling a combustor according to the present invention, in the fourth configuration, the start stop step includes an alarm table indicating that the operation of the fuel supply unit and the igniter has been temporarily stopped. It is characterized in that it is displayed on the output means.

  The program according to the present invention is executed on a computer to cause the computer to function as a control unit for the combustor according to the first to fifth configurations.

  As described above, according to the present invention, the accumulated operation time of the fuel supply means can be limited so that the stay of unburned fuel remains within the safe range, so that the safety of the combustor is improved.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a configuration diagram of a water heater according to an embodiment of the present invention. As is clear from FIG. 1, the water heater 1 includes a water heater body 2, a control panel 3, and a remote controller 4. The hot water heater main body 2 is a so-called hot water storage boiler, and has a substantially double cylindrical shape. A space inside the inner cylinder is a combustion chamber 21, and a space between the outer cylinder and the inner cylinder is a hot water storage tank 22. Yes. The hot water storage tank 22 is supplied with water by a water supply pipe (not shown), and hot water is prepared by the combustion heat of kerosene that is sown in the combustion chamber 21. The hot water is fed to a consumption terminal (not shown) such as a currant or a shower head through a hot water supply pipe (not shown). A blower 23 is provided on the side wall of the combustion chamber 21. A fuel injection nozzle 24 is attached inside the blower outlet of the blower 23 and faces the combustion chamber 21. An igniter 25 is attached in the vicinity of the fuel injection nozzle 24. A fuel pump 26 supplies fuel kerosene to the fuel injection nozzle 24.

  The control panel 3 is a computer that controls the water heater main body 2 in accordance with an operation command input from the remote controller 4 and a control program written therein. That is, the control panel 3 commands start / stop of the blower 23, start / stop of the fuel pump 26 and speed (= fuel supply amount) adjustment, and energization / stop of the igniter 25 in accordance with the operation command and the control program. It is a device to do. Reference numeral 31 denotes a combustion sensor. The combustion sensor 31 is an optical sensor such as CdS and detects a flame caused by combustion of kerosene ejected from the fuel injection nozzle 24. A temperature sensor 32 detects the temperature of the hot water in the hot water tank 22. The detailed configuration of the control panel 3 will be described later.

  The remote controller 4 is a device that inputs an operation signal to the control panel 3 and displays control information output from the control panel 3, and includes an operation switch 41 and a display 42. The operation switch 41 is a push button switch for starting and stopping the water heater 1. When the operation switch 41 is depressed while the water heater 1 is stopped, the activation sequence is activated, and the blower 23, the igniter 25 and the fuel pump 26 are activated. When the operation switch 41 is pushed down during operation of the water heater 1 or during execution of the activation sequence, the blower 23, the igniter 25, and the fuel pump 26 are stopped. The display device 42 is a display device that uses liquid crystals or LEDs that display various types of information related to operation control of the water heater 1 in characters or graphics.

  FIG. 2 is a control block diagram showing the configuration of the control panel 3. In FIG. 2, 33 is an operation time measuring means, 34 is an activation stopping means, 35 is an operation time integrating means, 36 is an accumulated time resetting means, and 37 is an activation prohibiting means.

  The operation time measuring means 33 starts measuring the time when the fuel pump 26 is activated, ends the time measurement when the fuel pump 26 stops, transmits the result to the operation time integrating means 35, and thereafter This is a control module that resets the measurement result to zero. That is, the operation time measuring means 33 measures the time from the start to the stop of the fuel pump 26 for each operation. Further, the operation time measuring means 33 is constantly monitored by the activation stopping means 34.

  If the combustion sensor 31 does not detect normal combustion of kerosene when the operating time of the fuel pump 26 measured by the operating time measuring means 33 exceeds a predetermined time (for example, 10 seconds), the start stopping means 34 is the igniter 25. The control module that stops the operation of the fuel pump 26 and the blower 23, resets the operation switch 41, enables the input of the next “operation on”, and displays the message of “ignition failure” on the display 42. It is.

  The operating time integrating means 35 is a control module that sequentially adds the operating times of the fuel pump 26 transmitted from the operating time measuring means 33 to calculate and hold the integrated operating time of the fuel pump 26, and the operating time of the fuel pump 26. Is added, that is, every time the accumulated operation time of the fuel pump 26 is updated, the value is transmitted to the start prohibiting means 37.

  The accumulated time resetting means 36 is a control module that is activated when the combustion sensor 31 detects normal combustion of kerosene and returns the accumulated operating time of the fuel pump 26 held by the operating time integrating means 35 to zero. The accumulated time resetting means 36 is also activated when the main power supply to the control panel 3 is turned on, and returns the accumulated operation time of the fuel pump 26 to zero.

  The start prohibiting means 37 is started when the accumulated operation time of the fuel pump 26 held by the operation time integrating means 35 exceeds a predetermined threshold (for example, 100 seconds), and the igniter 25 and the fuel pump 26 are connected to the main power source. This is a control module that prohibits activation of the igniter 25 and the fuel pump 26 by operating the operation switch 41 and displays a message of “ignition failure” on the display 42 after that.

  FIG. 3 is a flowchart showing a startup sequence of the water heater 1 executed by the control panel 3. The activation sequence will be described below with reference to the step numbers given in FIG.

(Step 1) The activation sequence is started by turning on the main power to the control panel 3. When the main power is turned on, the accumulated time resetting means 36 is activated, and the accumulated operating time T of the fuel pump 26 held by the operating time integrating means 35 is returned to zero.

(Step 2) Wait for the start command by the operation of the operation switch 41 to be input. When the activation instruction is input, the process proceeds to step 3.

(Step 3) The startup sequence is executed. That is, the blower 23 is activated to scavenge the combustion chamber 21, the igniter 25 is energized to generate sparks, and finally the fuel pump 26 is activated to inject kerosene from the fuel injection nozzle 24. The operation time measuring means 33 is activated.

(Step 4) If the combustion sensor 31 detects a stable flame, it is determined that the ignition is normally performed, and the routine proceeds to Step 5. If the combustion sensor 31 cannot detect the flame within the predetermined time, or if the start-up sequence is instructed by operating the operation switch 41, the process proceeds to step 6.

(Step 5) The accumulated time resetting means 36 is activated to return the accumulated operating time T of the fuel pump 26 held by the operating time integrating means 35 to 0, and then the control of the water heater 1 is shifted to the combustion control sequence. .

(Step 6) An alarm of “ignition failure” is displayed on the display 42, the blower 23 and the fuel pump 26 are stopped, the energization of the igniter 25 is stopped, and the operation time measuring means 33 is further stopped.

(Step 7) If the accumulated operation time T of the fuel pump 26 held by the operation time accumulating means 35 is greater than the predetermined threshold Tmax due to several ignition failures, the process proceeds to Step 8, otherwise Step 2 The process waits until the start command from the operation switch 41 by the operation of the remote controller 4 is re-input.

(Step 8) The start prohibiting means 37 is started to cut off the power supply to the igniter 25 and the fuel pump 26. An alarm of “ignition impossible” is displayed on the display 42, and the activation sequence is stopped. Thereby, the starting of the starting sequence by the operation of the operation switch 41 thereafter becomes invalid.

  FIG. 4 is a diagram for explaining an example of stopping the start-up operation of the water heater 1 according to the present invention. In FIG. 4, the horizontal axis indicates the passage of time t starting from the first startup of the fuel pump 26, and the vertical axis indicates the accumulated operation time T of the fuel pump 26. In this figure, the start (ignition) of the water heater 1 was attempted four times, and both failed, and the cumulative operation time T of the fuel pump 26 exceeded the threshold value Tmax at the fourth time, so the fifth and subsequent activations were prohibited. It is shown that.

  FIG. 5 is a diagram showing a specific design example of the remote controller 4. The indicator 42 is a liquid crystal display with a backlight, which displays the time and hot water set temperature during normal operation, but flashes the error code “E7” meaning “ignition failure” when ignition fails, and ignition is impossible. At the time of (startup prohibition), an error code “E9” meaning “ignition impossible” is blinked.

  In this embodiment, when the accumulated operation time T of the fuel pump 26 exceeds the threshold value Tmax, a configuration in which activation of the activation sequence by subsequent operation of the operation switch 41 is invalidated is shown. In some cases, the speed of the fuel pump 26 is changed by changing the speed of the fuel pump 26 (= fuel supply amount) each time ignition is attempted. In such a case, it is not appropriate to use the accumulated operation time T of the fuel pump 26 to limit the activation of the activation sequence. Therefore, the amount of fuel supplied by the fuel pump 26 may be integrated, and when the integrated value exceeds a predetermined threshold, the start of the start sequence by the subsequent operation of the operation switch 41 may be invalidated. In this case, the fuel supply amount may be measured by providing a dedicated flow meter between the fuel pump 26 and the fuel injection nozzle 24, or the operating time of the fuel pump 26 is multiplied by the speed (= fuel supply amount). You may ask.

  If the start of the igniter 25 and the fuel pump 26 by the operation switch 41 is prohibited, the control parameter of the control panel 3 returns to the initial value if the main power supply of the control panel 3 is once cut off and turned on again. The start prohibition is canceled. Alternatively, a reset switch for releasing activation prohibition may be provided. Alternatively, a timer that automatically cancels the start prohibition after a predetermined time (for example, 24 hours) may be provided.

  Moreover, although the present embodiment has shown an example in which warnings of “ignition failure” and “ignition failure” are displayed in characters on the display 42, the display of the warning is not limited to characters, such as graphics, symbols, voices, etc. Various display means can be selected.

  Further, in this embodiment, a combustor using kerosene as a fuel is taken up, but the present invention is not limited to this, and a combustor using liquid fuel such as light oil and heavy oil, and gaseous fuel such as propane and methane. It goes without saying that is also applicable.

It is a block diagram of the water heater based on the Example of this invention. It is a control block diagram which shows the structure of the control panel of the said water heater. It is a flowchart which shows the starting sequence of the water heater performed by the said control panel. It is a figure explaining the example of starting operation stop of the water heater by this invention. It is a figure which shows the specific design example of a remote control.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water heater 2 Water heater main body 3 Control panel 4 Remote control 21 Combustion chamber 22 Hot water storage tank 23 Blower 24 Fuel injection nozzle 25 Igniter 26 Fuel pump (fuel supply means)
31 Combustion sensor 32 Temperature sensor 33 Operating time measuring means (measuring means)
34 Start stopping means 35 Operating time integrating means (integrating means)
36 Accumulated time resetting means 37 Start prohibiting means 41 Operation switch (ignition switch)
42 Display

Claims (11)

A combustion chamber;
A fuel injection nozzle arranged toward the combustion chamber;
Fuel supply means for supplying fuel to the fuel injection nozzle;
An igniter that ignites fuel injected from the fuel injection nozzle;
A combustion sensor for detecting a combustion state of fuel injected from the fuel injection nozzle;
An ignition switch that activates the igniter and the fuel supply means;
In a combustor comprising the fuel supply means and a control means for controlling start and stop of the igniter,
The control means measures and integrates the operation time of the fuel supply means or the supply amount of the fuel supplied to the fuel injection nozzle;
When the combustion sensor detects normal combustion of the fuel injected from the fuel injection nozzle, an operating time (hereinafter referred to as “integrated operating time”) or a supply amount (hereinafter referred to as “integrated operating time”) of the fuel supply means integrated by the measurement integration means. Integrated amount resetting means for returning the integrated supply amount to 0);
And an activation prohibiting means for prohibiting subsequent activation of the fuel supply means by the ignition switch when the integrated operation time or the integrated supply amount of the fuel supply means integrated by the measurement integrating means exceeds a predetermined threshold. A combustor comprising: 2. The combustor according to claim 1, wherein the start prohibiting unit includes an alarm displaying unit that displays an alarm indicating that the start of the fuel supply unit is prohibited. The activation prohibiting unit prohibits subsequent activation of the igniter by the ignition switch when the accumulated operation time or the accumulated supply amount of the fuel supply unit integrated by the measurement integration unit exceeds the predetermined threshold. The combustor according to claim 1 or 2, characterized in that. The control means, after the fuel supply means and the igniter are activated, when a predetermined time elapses without the combustion sensor detecting normal combustion of the fuel injected from the fuel injection nozzle, The hot water heater according to any one of claims 1 to 3, further comprising a start stopping unit that temporarily stops the operation of the igniter and waits for the operation of the ignition switch again. 5. The combustor according to claim 4, wherein the start stopping unit includes an alarm displaying unit that displays an alarm indicating that the operation of the fuel supply unit and the igniter has been temporarily stopped. A combustion chamber;
A fuel injection nozzle arranged toward the combustion chamber;
Fuel supply means for supplying fuel to the fuel injection nozzle;
An igniter that ignites fuel injected from the fuel injection nozzle;
A combustion sensor for detecting a combustion state of fuel injected from the fuel injection nozzle;
An ignition switch that activates the igniter and the fuel supply means;
In a control method of a combustor comprising the fuel supply means and a control means for controlling start and stop of the igniter,
A measurement integration step of measuring and integrating the operating time of the fuel supply means or the amount of fuel supplied to the fuel injection nozzle;
When the combustion sensor detects normal combustion of the fuel injected from the fuel injection nozzle, the execution of the measurement integration step is stopped, and an integrated value of the operation time of the fuel supply means (hereinafter referred to as “integrated operation time”). Or an integrated amount resetting step for returning the integrated value of supply amount (hereinafter referred to as “integrated supply amount”) to zero;
And an activation prohibiting step for prohibiting subsequent activation of the fuel supply means by the ignition switch when the integrated operation time or the integrated supply amount of the fuel supply means integrated by the measurement integration step exceeds a predetermined threshold value. A control method for a combustor, comprising: The combustor control method according to claim 6, wherein in the start prohibition step, an alarm indicating that start of the fuel supply unit is prohibited is displayed on an alarm display unit. The start prohibiting step prohibits subsequent start of the igniter by the ignition switch when an integrated operation time or an integrated supply amount of the fuel supply unit integrated by the measurement integration unit exceeds the predetermined threshold. The method for controlling a combustor according to claim 6 or 7, wherein: After the fuel supply means and the igniter are activated, when the predetermined time has passed without the combustion sensor detecting normal combustion of the fuel injected from the fuel injection nozzle, the fuel supply means and the igniter are operated. The method for controlling a water heater according to any one of claims 6 to 8, further comprising a start stopping step of temporarily stopping the operation and waiting for the operation of the ignition switch again. 10. The combustor according to claim 9, wherein in the start stop step, an alarm indicating that the operation of the fuel supply unit and the igniter has been stopped is displayed to an alarm display unit. A program that causes a computer to function as the control means according to any one of claims 1 to 5 by being executed on the computer.

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