JP6350035B2 - Boiler device and boiler system - Google Patents

Description

  The present invention relates to a boiler device that includes a flame sensor and a self-diagnosis unit that performs self-diagnosis of the flame sensor, and a boiler system that includes the boiler device.

2. Description of the Related Art Conventionally, a boiler apparatus that burns fuel with a burner and generates steam by evaporating water with heat generated when the fuel is burned is widely used. In such a boiler device, the presence or absence of fuel combustion by the burner is detected by a flame sensor that detects the light of the flame formed by the burner.
In addition, in the case of a false detection in which a flame is detected even though no flame is formed due to a failure of the flame sensor, the fuel supply is continued in a state where the fuel is not combusted. As a result, the safety of the boiler device is reduced.

  Therefore, the boiler device can be repositioned between a blocking position that blocks the incidence of flame light on the flame sensor and a non-blocking position that does not block the incidence of flame light on the flame sensor, There has been proposed a technique that includes a self-diagnosis unit that self-diagnose whether or not flame light is detected by a flame sensor in a state where the light shielding unit is located at the blocking position (see, for example, Patent Document 1). .

JP 2004-138302 A

  In the boiler apparatus proposed in Patent Document 1, the self-diagnosis of the flame sensor is performed every time a predetermined combustion time elapses while the burner is burning, and also when the burner is not burning, The safety of the equipment is improved.

  By the way, the flame sensor outputs a pulse in response to detecting light of a predetermined wavelength (for example, ultraviolet light), and the boiler device determines that the burner is burning by detecting the output of this pulse. To do. Here, once the flame sensor detects the flame light and outputs a pulse, there may be a problem that the pulse output is continued even if the flame light is not detected.

  Therefore, an object of the present invention is to provide a boiler device and a boiler system having the boiler device that can further improve safety.

  The present invention includes a can, a burner for burning fuel, a flame sensor for detecting the presence or absence of a flame formed by the burner, a blocking position for blocking the incidence of flame light on the flame sensor, and the flame Whether the flame light is detected by the flame sensor in a state in which the position of the light can be changed between non-blocking positions that do not block the incidence of flame light on the sensor, and the light blocking means is positioned at the blocking position. A self-diagnosis unit for self-diagnosis, wherein the self-diagnosis unit positions the light-shielding means at the shut-off position when a first time has elapsed after the start of ignition of the burner. In particular, the present invention relates to a boiler apparatus having an ignition self-diagnosis unit for self-diagnosis whether flame light is detected by the flame sensor.

  The boiler device further includes a power-on detection unit that detects that the power of the boiler device is turned on, and the ignition self-diagnosis unit detects that the power is turned on by the power-on detection unit. Preferably, a self-diagnosis is performed when the burner is first ignited.

  The boiler device further includes a water supply line that supplies water to the can body, and a water supply control unit that controls supply of water to the can body, wherein the self-diagnosis unit is configured at a second time interval. A periodical self-diagnosis unit that performs self-diagnosis of the flame sensor, and a state in which no water supply is requested to the can body by the water supply control unit in a state in which flame light is detected by the flame sensor is the second time. It is preferable to further include an irregular self-diagnosis unit that performs self-diagnosis of the flame sensor when the third time is shorter than the third time.

  Moreover, this invention is a boiler system provided with the several boiler apparatus in any one of the above-mentioned, and the number control apparatus which controls the combustion state of this several boiler apparatus, Comprising: The said number control apparatus is the said Self-diagnosis at the time of ignition having a control target setting unit that sets one or more boiler devices among a plurality of boiler devices as control target boilers, and sets boiler devices excluding the control target boilers as non-control target boilers The section relates to a boiler system that performs self-diagnosis when the burner is first ignited after being set as a control target boiler by the control target setting unit.

  ADVANTAGE OF THE INVENTION According to this invention, the boiler apparatus which can improve safety | security more, and the boiler system which has this boiler apparatus can be provided.

It is a figure which shows the boiler apparatus which concerns on 1st Embodiment of this invention. It is a functional block diagram which shows the structure of a control part. It is a flowchart which shows the operation | movement at the time of ignition of the boiler apparatus of 1st Embodiment. It is a figure which shows the boiler system which concerns on 2nd Embodiment of this invention.

Hereinafter, preferred embodiments of a boiler device and a boiler system of the present invention will be described with reference to the drawings.
First, the boiler apparatus 1 which concerns on 1st Embodiment of this invention is demonstrated. The boiler device 1 of the first embodiment is a steam boiler that generates steam by heating water. As shown in FIG. 1, the boiler device 1 includes a boiler body 10, a blower 20 that sends combustion air to the boiler body 10, and a supply air through which combustion air flows by connecting the boiler body 10 and the blower 20. A duct 30, a damper 40 disposed in the air supply duct 30, a fuel supply device 50 that supplies fuel gas to the air supply duct 30, an exhaust pipe 60 through which combustion gas discharged from the boiler body 10 circulates, and water supply The line 70 and the control part 80 which controls the combustion state of the boiler apparatus 1 are provided.

As shown in FIG. 1, the boiler body 10 includes a can 11, a plurality of water pipes 12, a lower header 13, an upper header 14, a burner 15, a flame sensor 16, and a light shielding means (not shown). .
The can 11 constitutes the outer shape of the boiler body 10 and is formed in a rectangular parallelepiped shape in a plan view. An air supply port 111 is formed on the first side surface 11a located on one end side in the longitudinal direction of the can body 11, and an exhaust port is formed on the second side surface 11b located on the other end side in the longitudinal direction of the can body 11. 112 is formed.

The plurality of water pipes 12 are arranged extending in the vertical direction inside the can body 11 and are arranged at predetermined intervals in the longitudinal direction and the width direction of the can body 11.
The lower header 13 is disposed below the can body 11. The lower header 13 is connected to the lower ends of the plurality of water pipes 12.

The upper header 14 is disposed on the upper portion of the can body 11. The upper header 14 is connected to the upper ends of the plurality of water pipes 12. The upper header 14 is provided with a vapor pressure sensor 141.
The vapor pressure sensor 141 is electrically connected to the control unit 80 via a signal line. The vapor pressure sensor 141 measures the vapor pressure inside the upper header 14 (the pressure of the vapor generated in the boiler device 1), and transmits a signal (vapor pressure signal) related to the measured vapor pressure to the control unit 80.

The burner 15 is disposed in the air supply port 111. The burner 15 includes a main burner and a pilot burner (not shown individually).
The main burner burns a mixed gas of combustion air supplied from the blower 20 and fuel gas supplied from the fuel supply device 50.
The pilot burner is used at the time of ignition in which the main burner is ignited and combustion of the boiler device 1 is started.

  The flame sensor 16 is disposed in the vicinity of the burner 15 inside the can 11. The flame sensor 16 is composed of, for example, an ultraviolet discharge tube, and detects the presence or absence of flame light formed by the burner 15. Specifically, the flame sensor 16 outputs a pulse in response to detecting light of a predetermined wavelength (for example, ultraviolet light).

  The light shielding means is disposed between the burner 15 and the flame sensor 16. Based on the control signal from the control unit 80, the light shielding means includes a blocking position that blocks the incidence of flame light on the flame sensor 16 and a non-blocking position that does not block the incidence of flame light on the flame sensor 16. It is comprised by the shutter arrange | positioned so that a position change is possible.

  The blower 20 includes a blower body 21 having a fan and a motor that rotates the fan, and an inverter 22 that increases or decreases the number of rotations of the fan (motor). The blower 20 feeds combustion air into the can body 11 with a predetermined output as the fan rotates at a predetermined rotation speed in accordance with the frequency input to the inverter 22.

The air supply duct 30 has an upstream end connected to the blower 20 and a downstream end connected to the air supply port 111. The air supply duct 30 supplies the combustion air sent from the blower 20 to the can body 11.
The damper 40 is in a closed state in which the combustion air flow path inside the air supply duct 30 is closed and rotated 90 degrees from this closed state to open the combustion air flow path in the air supply duct 30. It is arranged to be rotatable between states.

The fuel supply device 50 includes a gas supply line 51, and an adjustment valve 52 and a nozzle 53 provided in the gas supply line.
The gas supply line 51 is connected to the downstream side of the air supply duct 30 from the position where the damper 40 is disposed, and supplies the fuel gas to the air supply duct 30.
The adjustment valve 52 adjusts the flow rate of the fuel gas supplied to the air supply duct 30.
The nozzle 53 is disposed at the tip of the gas supply line 51 and ejects fuel gas into the air supply duct 30.

The exhaust tube 60 is connected to the exhaust port 112. The exhaust cylinder 60 discharges combustion gas generated by burning fuel gas inside the boiler body 10.
The water supply line 70 is connected to the lower header 13 and supplies water (canned water) used to generate steam to the boiler body 10.

  According to the boiler apparatus 1 described above, the combustion air sent to the air supply duct 30 by the blower 20 is mixed with the fuel gas supplied from the gas supply line 51, and the mixed gas of the fuel gas and the combustion air is mixed. It is ejected from the burner 15 into the inside of the can 11 and burned. And with the heat | fever which generate | occur | produces with combustion of the mixed gas by the burner 15, the water supplied to the inside of the some water pipe 12 via the lower header 13 from the water supply line 70 is heated, and a vapor | steam is produced | generated. The steam generated in the plurality of water pipes 12 is collected in the upper header 14 and then led to the outside through a steam outlet pipe (not shown). Further, the combustion gas generated by the combustion of the mixed gas is discharged from the exhaust cylinder 60 to the outside.

Next, the detail of control of the boiler apparatus 1 by the control part 80 is demonstrated.
The control unit 80 controls the combustion state (combustion rate) of the boiler device 1 by controlling the supply amount of combustion air and the supply amount of combustion gas to the boiler body 10, and the amount of steam generated by the boiler device 1. Adjust. More specifically, the control part 80 changes the combustion state of the boiler apparatus 1 according to the consumption of the steam by the load apparatus which the boiler apparatus 1 supplies steam, and adjusts the production amount of steam.

  Further, the control unit 80 determines whether or not fuel combustion is normally performed in the boiler device 1 based on the presence or absence of detection of flame light by the flame sensor 16. That is, the control unit 80 outputs a pulse that is output when the flame sensor 16 detects the flame light in a state where the boiler device 1 is burning (a state where a combustion instruction is issued to the boiler device 1). If is not detected, it is determined that combustion is not normally performed. Moreover, the control part 80 determines with the combustion being performed contrary to the combustion stop instruction | indication of the boiler apparatus 1, when the pulse is detected by the flame sensor 16 in the state which the combustion of the boiler apparatus 1 has stopped. .

Further, in the present embodiment, the control unit 80 further improves the safety of the operation of the boiler device 1 by performing self-diagnosis as to whether or not the flame sensor 16 is operating normally at a specific timing.
As a configuration for realizing the above functions, in this embodiment, the control unit 80 includes a power-on detection unit 81, a water supply control unit 82, and a self-diagnosis unit 90, as shown in FIG.

The power-on detection unit 81 detects that the power supply (operation switch) of the boiler device 1 is turned on.
The water supply control unit 82 controls water supply to the boiler body 10 based on the combustion state of the boiler device 1 and the water level of the can water inside the plurality of water pipes 12. For example, the water supply control unit 82 supplies water to the boiler body 10 when the water level of the can water falls below a lower limit reference water level set in advance according to the combustion state in a state where the boiler device 1 is burning. Give water supply instructions. Moreover, the water supply control part 82 stops the water supply to the boiler main body 10, when the water level of a can water exceeds the upper limit reference | standard water level preset according to the combustion state.

  The self-diagnosis unit 90 performs self-diagnosis of the flame sensor 16 by detecting whether the flame sensor 16 has detected the light of the flame in a state where the light shielding unit is located at the blocking position. In the present embodiment, the self-diagnosis unit 90 includes a periodic self-diagnosis unit 91, an ignition self-diagnosis unit 92, and an irregular self-diagnosis unit 93.

  The periodic self-diagnosis unit 91 performs self-diagnosis at a second time interval (for example, every hour) while the boiler device 1 is burning. Thereby, when a malfunction occurs in the flame sensor 16, the occurrence of the malfunction can be found within the second time.

By the way, once the flame sensor 16 detects the flame light and outputs a pulse, there may be a problem in that the pulse output is continued even if the flame light is not detected.
Accordingly, the ignition self-diagnosis unit 92 positions the light shielding means at the blocking position when a first time (for example, 1 minute) shorter than the second time has elapsed after the ignition of the burner 15 has started. The flame sensor 16 determines whether flame light is detected.

  More specifically, when the boiler apparatus 1 starts combustion by the burner 15 from the combustion stopped state (at the start of ignition), the pre-purge process of ventilating the inside of the boiler body 10 (can body 11), the burner 15 (pilot burner) ) Through a pre-ignition process for generating a flame that forms a flame, an ignition trial process for igniting the pilot burner, a pilot-only process for burning only the pilot burner with the fire extinguished, and a main try process for igniting the main burner.

  In the present embodiment, the ignition self-diagnosis unit 92 performs self-diagnosis when the first time has elapsed after the pre-purge process is completed. As a result, when the flame disappears after the flame is instantaneously formed in the pre-ignition process, the flame sensor 16 detects the flame light after detecting the flame light once and outputting the pulse. Even if there is a problem that the pulse output continues even if not, this problem can be detected early.

  Further, since the flame sensor 16 has a precise structure, such a problem may occur when an external impact is applied to the flame sensor 16. Therefore, the ignition self-diagnosis unit 92 may perform self-diagnosis when the burner 15 is first ignited after the power-on detection unit 81 detects that the power of the boiler device 1 is turned on. . Thereby, the self-diagnosis is performed at the time of ignition after the power is turned on from the power-off state where there is a high possibility that an external force is applied to the boiler device 1 by checking the boiler device 1 or the like.

  The irregular self-diagnosis unit 93 is in a state where the flame sensor 16 detects the light of the flame and the state where there is no water supply request to the boiler body 10 by the water supply control unit 82 is shorter than the second time. When it continues (for example, 5 minutes), the flame sensor 16 performs a self-diagnosis. That is, even if the flame sensor 16 detects the flame light, if there is no water supply request for a certain period of time, it is highly likely that the flame of the burner 15 has actually disappeared. Therefore, by causing the irregular self-diagnosis unit 93 to perform a self-diagnosis of the flame sensor 16 when the flame sensor 16 detects the flame light and there is no water supply request for the third time, When there is a high possibility that a failure of the flame sensor 16 has occurred, the self-diagnosis is performed earlier.

  The third time can be appropriately set according to the combustion state of the boiler device 1. That is, in the state where the combustion rate of the boiler apparatus 1 is high, the level of the can water contained in the water pipe 12 is quickly lowered as compared with the state where the combustion rate is low. Therefore, in the state where the combustion rate of the boiler apparatus 1 is high, the third time may be set shorter than in the state where the combustion rate is low.

  Moreover, the control part 80 has the reference value set as 3rd time, and the unit time subtraction value set according to the combustion state (combustion rate) of the boiler apparatus 1, and there is no water supply request | requirement The unit time subtraction value corresponding to the combustion rate of the boiler device 1 may be subtracted from the reference value. The irregular self-diagnosis unit 93 may perform a self-diagnosis of the flame sensor 16 when the value obtained by subtracting the unit time subtraction value from the reference value becomes zero.

  Next, the operation at the time of ignition of the boiler device 1 of the first embodiment will be described with reference to FIG. FIG. 3 is a flowchart showing an operation at the time of ignition of the boiler device 1 of the first embodiment.

  When the steam pressure in the upper header 14 decreases due to an increase in the amount of steam consumed by the load device in a state where the combustion of the boiler device 1 is stopped, the control unit 80 combusts in the boiler device 1 in step ST1. Give instructions.

  In step ST <b> 2, the control unit 80 performs a pre-purge inside the boiler body 10. Specifically, the control unit 80 operates the blower 20 with a predetermined output to ventilate the inside of the can body 11. Then, when the pre-purge is completed, the process proceeds to step ST3.

  In step ST3, the control unit 80 determines whether or not flame light is detected by the flame sensor 16. If this determination is NO, the process moves to step ST4. If the determination is yes, the process moves to step ST5.

  In step ST4, the control unit 80 ignites the burner 15. Specifically, the control unit 80 starts combustion of the boiler device 1 by burning the fuel gas with the burner 15 through the pre-ignition process, the ignition try process, the pilot-only process, and the main try process.

  In step ST5, the control unit 80 determines that a problem has occurred in the boiler device 1 (even though no combustion instruction has been issued, flame light has been detected), and performs alarm notification. Then, the process ends.

  In step ST6, the ignition self-diagnosis unit 92 determines whether or not the first time has elapsed after the ignition of the burner 15 is started (after the pre-purge is completed). If this determination is YES, the process proceeds to step ST7. If the determination is NO, the process of step ST6 is repeated.

  In step ST7, the ignition self-diagnosis unit 92 positions the light shielding means (shutter) at the blocking position.

  In step ST8, the ignition self-diagnosis unit 92 determines whether or not flame light is detected by the flame sensor 16 (ignition self-diagnosis). If this determination is NO (that is, flame light is not detected with the shutter closed), the process proceeds to step ST9. When the determination is YES (that is, when flame light is detected even when the shutter is closed), the ignition self-diagnosis unit 92 determines that the flame sensor 16 is malfunctioning, and the process proceeds to step ST11. .

  In step ST9, the ignition self-diagnosis unit 92 positions the shutter at the non-blocking position.

In step ST10, the ignition self-diagnosis unit 92 determines whether or not flame light is detected by the flame sensor 16. When this determination is YES (that is, when a flame light is detected with the shutter opened), the ignition self-diagnosis unit 92 determines that the flame sensor 16 is operating normally, and the ignition self The diagnosis process is terminated. Thereafter, the self-diagnosis of the flame sensor 16 is performed by the periodic self-diagnosis unit 91 and the irregular self-diagnosis unit 93.
When the determination is NO (that is, when no flame light is detected even when the shutter is opened), the control unit 80 determines that the flame of the burner 15 is extinguished even though a combustion instruction is issued. Then, the process proceeds to step ST11.

In step ST11, the control unit 80 closes the adjustment valve 52, stops the supply of fuel gas, and stops combustion.

  In step ST12, the control unit 80 performs alarm notification. Then, the process ends.

  According to the boiler device 1 of 1st Embodiment demonstrated above, there exist the following effects.

  (1) The boiler device 1 is configured to include a self-diagnosis unit 90 that self-diagnose whether the flame sensor 16 has detected the light of the flame in a state where the light shielding means is located at the blocking position. Is configured to include an ignition self-diagnosis unit 92 that performs self-diagnosis when a first time has elapsed after the start of ignition of the burner 15. Thereby, even if the flame sensor 16 detects the light of the flame and outputs the pulse, even if it does not detect the light of the flame and continues to output the pulse, The failure self-diagnosis unit 92 can diagnose this problem in a short time after ignition. Therefore, the safety of the boiler device 1 can be further improved.

  (2) Since the flame sensor 16 has a precise structure, the above-described problems may occur when an external impact is applied to the flame sensor 16. Therefore, the boiler apparatus 1 includes a power-on detection unit 81, and the burner 15 is ignited after the ignition self-diagnosis unit 92 detects that the power-on detection unit 81 has turned on the power. In the case of self-diagnosis. Thereby, the self-diagnosis is performed at the time of ignition after the power source is turned on from the power-off state where there is a high possibility that an external force is applied to the boiler device 1 by checking the boiler device 1 or the like. Therefore, the safety | security of the boiler apparatus 1 can be improved, suppressing the frequency | count of operation | movement of a light-shielding means.

  (3) If there is no water supply request for a certain period of time despite the detection of flame light by the flame sensor 16, it is highly likely that the flame of the burner 15 has actually disappeared. Therefore, the self-diagnosis unit 90 includes a periodic self-diagnosis unit 91 and an irregular self-diagnosis unit 93, and the flame sensor 16 detects flame light in the irregular self-diagnosis unit 93. The self-diagnosis of the flame sensor 16 was performed when no water supply request was continued for the third time. As a result, when there is a high possibility that a failure of the flame sensor 16 has occurred, the self-diagnosis is performed earlier. Therefore, the safety of the boiler device 1 can be further improved.

Next, a boiler system 100 according to a second embodiment of the present invention will be described with reference to FIG. In the description of the second embodiment, the same components are denoted by the same reference numerals, and the description thereof is omitted or simplified.
In 2nd Embodiment, when the boiler system 100 is comprised including the several boiler apparatuses 1 and the number control apparatus 3 which controls the combustion state of these several boiler apparatuses 1, the boiler apparatus 1 is the number control apparatus. 3 is different from the first embodiment in that a self-diagnosis at the time of ignition is performed when ignition is performed for the first time after being controlled by 3.

  The boiler system 100 according to the second embodiment measures a plurality of (five) boiler apparatuses 1, a steam header 6 that collects steam generated in the plurality of boiler apparatuses 1, and a pressure inside the steam header 6. A vapor pressure sensor 7 that controls the combustion state of the plurality of boiler devices 1.

The several boiler apparatus 1 produces | generates the vapor | steam supplied to the steam use equipment 18 as a load apparatus.
Each of the plurality of boiler devices 1 is electrically connected to the number control device 3 via a signal line 61. The control units 80 of the plurality of boiler devices 1 control the combustion state of the boiler device 1 based on the number control signal transmitted from the number control device 3 via the signal line 61. Further, the control unit 80 transmits a signal used in the number control device 3 to the number control device 3 through the signal line 61. Examples of the signal used in the number control device 3 include the actual combustion state of the boiler device 1 and other data.

The steam header 6 is connected to the plurality of boiler devices 1 via steam pipes 62. The downstream side of the steam header 6 is connected to the steam use facility 18 via the steam pipe 63.
The steam header 6 collects and stores the steam generated by the plurality of boiler apparatuses 1 to adjust the pressure difference and pressure fluctuation between the plurality of boiler apparatuses 1 and uses the steam whose pressure is adjusted as steam. Supply to the facility 18.

  The vapor pressure sensor 7 is electrically connected to the number control device 3 via a signal line 64. The vapor pressure sensor 7 measures the vapor pressure inside the vapor header 6 (the pressure of the vapor generated in the plurality of boiler devices 1), and sends a signal (vapor pressure signal) related to the measured vapor pressure via the signal line 64. To the number control device 3.

  The number control device 3 controls the combustion state of the plurality of boiler devices 1 based on the steam pressure inside the steam header 6 measured by the steam pressure sensor 7. More specifically, the number control device 3 gives various instructions to the boiler device 1 through the signal line 61 and receives various data from the boiler device 1, so that the five boiler devices 1 Manage the combustion state.

In the present embodiment, the number control device 3 includes a control target setting unit 31. The control target setting unit 31 sets one or more boiler devices 1 among the plurality of boiler devices 1 as control target boilers, and sets the boiler device 1 excluding the control target boilers as non-control target boilers.
More specifically, the control target setting unit 31 includes, for example, three boiler apparatuses 1 among five boiler apparatuses 1 as control target boilers, and the remaining two boiler apparatuses 1 as non-control target boilers. To do. In this case, when the control unit 80 of the controlled target boiler receives a signal for changing the combustion state from the number control device 3, it controls the boiler device 1 according to the instruction. Then, the non-control target boiler is not controlled by the number control device 3, and the combustion is stopped.
In addition, the control target setting unit 31 rotates the control target boiler at a preset time or time interval.

  Here, in the second embodiment, the ignition self-diagnosis unit 92 performs self-diagnosis when the burner 15 is first ignited after being set as the control target boiler by the control target setting unit 31. That is, the boiler device 1 that has been stopped for a long time as a non-control target boiler may be inspected while being non-control target, and an external force may be applied to the flame sensor 16. . Therefore, the operation of the light shielding means is performed by causing the ignition self-diagnosis unit 92 to perform a self-diagnosis of the flame sensor 16 when the boiler device 1 changed from the non-control target boiler to the control target boiler is first ignited. The safety of the boiler device can be improved while suppressing the number of times.

  According to the boiler system 100 of the second embodiment described above, in addition to the effects (1) to (3) described above, the following effects can be obtained.

  (4) Since the flame sensor 16 has a precise structure, a malfunction may occur when an external impact is applied to the flame sensor 16. Therefore, when the boiler system 100 is configured by the plurality of boiler devices 1 and the number control device 3 for controlling the combustion state of the plurality of boiler devices 1, the self-diagnosis unit 92 at the time of ignition is controlled by the non-control boiler. The self-diagnosis was performed when the burner 15 was ignited for the first time after the setting was changed to the controlled boiler. Thereby, the self-diagnosis is performed at the time of ignition after the setting is changed to the control target boiler from the non-control target boiler that is likely to be subjected to the external force to the boiler device 1 by checking the boiler device 1 or the like. Therefore, the safety | security of the boiler apparatus 1 and the boiler system 100 can be improved, suppressing the frequency | count of operation | movement of a light-shielding means.

The preferred embodiments of the boiler device 1 and the boiler system 100 of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be appropriately changed.
For example, in the first and second embodiments, the ignition self-diagnosis unit 92 is controlled by the control target setting unit 31 when the first burner 15 is ignited after the power-on detection unit 81 is turned on. Although the self-diagnosis is performed when the first burner 15 is ignited after being set as the target boiler, the present invention is not limited thereto. In other words, the ignition self-diagnosis unit may perform self-diagnosis in all cases where the burner is ignited.

DESCRIPTION OF SYMBOLS 1 Boiler apparatus 3 Number control apparatus 11 Can 15 Burner 16 Flame sensor 31 Control object setting part 81 Power-on detection part 82 Water supply control part 90 Self-diagnosis part 91 Periodic self-diagnosis part 92 Self-diagnosis part at ignition 93 Unscheduled self-diagnosis part

Claims (4)

Can body,
A burner that burns fuel;
A flame sensor for detecting the presence or absence of a flame formed by the burner;
A light shielding means that can be repositioned between a blocking position that blocks the flame light incident on the flame sensor and a non-blocking position that does not block the flame light incident on the flame sensor. The light blocking means that remains in a non-blocking position that does not block the incidence of light;
A self-diagnosis unit for self-diagnosing whether there is detection of flame light by the flame sensor in a state where the light shielding means is located at the blocking position;
A power-on detection unit for detecting that the power of the boiler device is turned ON;
A boiler device comprising:
The self-diagnosis unit
A boiler device having an ignition self-diagnosis unit that performs self-diagnosis when the burner is first ignited after the power-on detection unit detects that the power is turned on . When the ignition self-diagnosis unit starts combustion by the burner from the combustion stopped state of the boiler device, a first preset time elapses after the pre-purge step of ventilating the inside of the can body is completed. Then, the boiler device according to claim 1 , wherein the light shielding means is positioned at the blocking position and self-diagnosis is performed by the flame sensor to determine whether flame light is detected . A water supply line for supplying water to the can body;
A water supply control unit for controlling the supply of water to the can body,
The self-diagnosis unit
A periodic self-diagnosis unit for performing self-diagnosis of the flame sensor at a second time interval;
When the flame sensor detects the flame light and the water supply control unit does not request water supply to the can body for a third time shorter than the second time, the flame The boiler device according to claim 1, further comprising an irregular self-diagnosis unit that performs self-diagnosis of the sensor. A boiler system comprising a plurality of boiler devices according to any one of claims 1 to 3, and a number control device for controlling a combustion state of the plurality of boiler devices,
The number control device includes a control target setting unit that sets one or more boiler devices of the plurality of boiler devices as control target boilers, and sets the boiler devices excluding the control target boilers as non-control target boilers. And
The ignition self-diagnosis unit is a boiler system that performs self-diagnosis when the burner is first ignited after being set as a control target boiler by the control target setting unit.

Images