JPH09196367A - Inspection method for not-yet-ignited component sensing sensor and inspection device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a reliability in inspection of a not-yet-ignited component sensing sensor irrespective of a dispersed assembling accuracy of a combustion device by itself. SOLUTION: There is provided an inspection not-yet-ignited component sensing sensor SB in which a detected value VB corresponding to a concentration of not-yet- ignited component in combustion discharged gas is outputted and a relative relation between the detected value and the concentration of the not-yet-ignited component is approximately equal to a set relative relation set in a control means for a combustion device. Under a state in which a sensing characteristic of the not-yet-ignited component sensing sensor SA for outputting a detected value VA corresponding to a concentration of the not-yet-ignited component in the discharged gas is set in the combustion device, its detected value of the not-yet-ignited component sensing sensor is compared with a detected value of an inspection not-yet-ignited component sensing sensor and it is discriminated if a relative relation between the detected value of the not-yet-ignited component sensing sensor and the concentration of the not-yet- ignited component is substantially equal to a set relative relation so as to perform the inspection.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to the detection characteristics of an unburned component detection sensor that outputs a detected value according to the concentration of unburned component in combustion exhaust gas,
Based on the preset detection value and the set correlation of the unburned component concentration, the inspection is not performed in the state of being installed in the combustion device provided with the control means for controlling the combustion state according to the unburned component concentration. The present invention relates to an inspection method and an inspection device for a fuel component detection sensor.

[0002]

2. Description of the Related Art An unburned component detection sensor changes the combustion state of a combustion device according to the unburned component concentration, such as issuing an alarm or stopping combustion when the unburned component concentration exceeds a set concentration. In order to control in accordance with the unburned component concentration in the combustion exhaust gas is provided to output a detection value, the control means, the detection value of the unburned component detection sensor, is set in advance. Since the combustion state is controlled according to the unburnt component concentration based on the detected value and the set correlation of the unburned component concentration, the correlation between the detected value of the unburned component detection sensor and the unburned component concentration is , And the same or substantially the same as the set correlation. However, the correlation between the detection value of the unburned component detection sensor and the unburned component concentration is set in advance due to variations in the detection characteristics of the unburned component detection sensor itself, variations in the assembly accuracy of the combustion device itself, etc. In some cases, the combustion state cannot be controlled according to the correct unburned component concentration, so if the unburned component concentration exceeds the set concentration, combustion will stop. If the control is performed so that the unburned component concentration does not actually exceed the set concentration, combustion is stopped, or conversely, the unburned component concentration actually exceeds the set concentration. However, there is an inconvenience that the combustion is not stopped. Therefore, the inspection method and the inspection device for the unburned component detection sensor inspect the inspection characteristics of the unburned component detection sensor in a state where the unburned component detection sensor is assembled to the combustion device. Then, the conventional unburned component detection sensor inspection method and inspection device are configured to combust the combustion device in a state in which the supply amount of combustion air is reduced to forcibly generate an unburned component of a predetermined concentration. The detection characteristic of the unburned component detection sensor is tested based on whether or not the unburned component detection sensor built into the combustion device outputs a detection value corresponding to the given concentration within a given time. (See, for example, JP-A-7-55139).

[0003]

However, even if the combustion device is operated by combustion with the supply amount of the combustion air being reduced to a predetermined amount, due to the variation in the assembly accuracy of the combustion device itself, Does not always generate a predetermined concentration of unburned components.For example, in the case of a combustion device that originally has a small amount of unburned components, even if the supply amount of combustion air is reduced to a predetermined amount, the detected value corresponding to the predetermined concentration is May not be output,
Even in this case, there is a disadvantage that the detection characteristic of the unburned component detection sensor incorporated in the combustion device is determined to be defective, and the inspection reliability is low. In addition, the transitional combustion state at the beginning of combustion varies from combustion device to combustion device, and in order to improve the reliability of the inspection, for example, if the inspection is performed after the combustion state is sufficiently stable, There is a problem that it takes time,
It has a drawback that it cannot be inspected efficiently and quickly. Then, in order to improve the above-mentioned inconvenience caused by the variation of the assembling accuracy of the combustion device itself and the variation of the transient combustion state at the early stage of combustion start, if the acceptance criterion of the detection characteristic is reduced, the reliability of the inspection is impaired. There is a drawback that it will be lost.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to improve the reliability of inspection regardless of variations in the assembly accuracy of the combustion device itself. Another object is to enable efficient and quick inspection regardless of transient variations in the combustion state at the beginning of combustion.

[0005]

According to a first aspect of the present invention, there is provided a method for inspecting an unburned component detecting sensor, comprising: a detection characteristic of an unburned component detecting sensor for outputting a detection value according to a concentration of unburned component in combustion exhaust gas; Based on the detection value of the unburned component detection sensor, and the preset correlation between the detection value and the unburned component concentration set in advance, control means for controlling the combustion state according to the unburned component concentration is provided. It is an inspection method for an unburned component detection sensor that is inspected in a state where it is installed in a combustion device that outputs a detected value according to the concentration of unburned component in combustion exhaust gas, and the detected value and unburned component concentration. An unburned component detection sensor for inspection having substantially the same correlation as the set correlation is provided, and the detected value and the inspection of the unburned component detection sensor according to the concentration of unburned component in the combustion exhaust gas of the combustion device. Value of the unburned component detection sensor for In comparison, since it is determined whether or not the correlation between the detection value of the unburned component detection sensor and the unburned component concentration is substantially the same as the set correlation, there is a variation in the assembly accuracy of the combustion device itself. Due to this, even if the amount of unburned components generated for each combustion device varies, the unburned component concentration at the time of inspection is detected as the detection value of the inspection unburned component detection sensor corresponding to the set correlation, If the deviation between the detection value and the detection value of the unburned component detection sensor is within the allowable range, the correlation between the detection value of the unburned component detection sensor and the unburned component concentration is almost the same as the set correlation. It can be determined, and if the deviation exceeds the allowable range, it can be determined that the correlation is out of the set correlation. Therefore, it is possible to improve the reliability of the inspection regardless of the variation in the assembly accuracy of the combustion device itself, and to detect the detection value of the unburned component detection sensor for inspection and the detected value of the unburned component detection sensor corresponding to the set correlation. Since it suffices to compare the value with the value, it is not particularly necessary to perform the inspection after the combustion state is sufficiently stable, and the inspection can be performed efficiently and quickly regardless of the transient variation in the combustion state at the initial stage of the combustion start.

According to a second aspect of the present invention, there is provided an inspection method for an unburned component detection sensor, wherein an inspection exhaust gas passage into which combustion exhaust gas from the combustion device is introduced is provided, and the unburned gas in the combustion exhaust gas introduced into the inspection exhaust gas passage is unburned. Since the detection value of the unburned component detection sensor for inspection according to the component concentration and the detected value of the unburned component detection sensor are compared, the inspection unburned exhaust gas passage of the combustion device to be inspected is inspected at each inspection. The inspection can be performed without setting the fuel component detection sensor, and the inspection can be performed more efficiently and quickly.

According to a third aspect of the present invention, there is provided a method for inspecting an unburned component detecting sensor, wherein the detected value of the unburned component detecting sensor and the detected value of the inspection unburned component detecting sensor are maintained for a predetermined time after the start of combustion. Since the comparison is made, the correlation between the change in the detected value and the change in the unburned component concentration according to the change in the generation amount of the unburned component can be inspected in series, and the reliability of the inspection can be further enhanced.

According to a fourth aspect of the present invention, there is provided a method for inspecting an unburned component detection sensor, wherein the combustion device is burned in a state where unburned components are easily generated, and the unburned component concentration in the combustion exhaust gas at that time is determined. Since the detected value of the unburned component detection sensor and the detected value of the inspection unburned component detection sensor are compared, for example, when the unburned component concentration increases beyond the set concentration, an alarm is issued or combustion is stopped, etc. When the control is performed, it is easy to inspect the correlation between the detection value and the unburned component concentration when the alarm is issued or the combustion is stopped, and it is easy to improve the control reliability.

In the unburned component detection sensor inspection apparatus according to the present invention, the unburned component detection sensor outputs a detection value corresponding to the concentration of unburned component in the combustion exhaust gas. Based on the detected value of, and the preset detection value and the set correlation of the unburned component concentration, it is installed in a combustion device provided with control means for controlling the combustion state according to the unburned component concentration. An unburned component detection sensor inspection device that inspects in a state, outputs a detection value according to the unburned component concentration in the combustion exhaust gas, and sets the correlation between the detected value and the unburned component concentration to the above-mentioned setting. An unburned component detection sensor for inspection having substantially the same correlation, a detection value of the unburned component detection sensor according to the unburned component concentration in the combustion exhaust gas of the combustion device, and the unburned component detection sensor for inspection Compared with the detected value, Since the comparison determination means for determining whether or not the correlation between the detection value of the detection sensor and the unburned component concentration is substantially the same as the set correlation, the variation in the assembly accuracy of the combustion device itself is provided. Due to this, even if the amount of unburned components generated in each combustion device varies, the unburned component concentration at the time of inspection is detected as the detection value of the unburned component detection sensor for inspection that corresponds to the set correlation. If the deviation between the detected value and the detected value of the unburned component detection sensor is within the allowable range, the correlation between the detected value of the unburned component detection sensor and the unburned component concentration is substantially the same as the set correlation. If the deviation exceeds the allowable range, it can be determined that the correlation is out of the set correlation. Therefore, it is possible to improve the reliability of the inspection regardless of the variation in the assembly accuracy of the combustion device itself, and to detect the detection value of the unburned component detection sensor for inspection and the detected value of the unburned component detection sensor corresponding to the set correlation. Since it suffices to compare the value with the value, it is not particularly necessary to perform the inspection after the combustion state is sufficiently stable, and the inspection can be performed efficiently and quickly regardless of the transient variation in the combustion state at the initial stage of the combustion start.

An inspection device for an unburned component detection sensor according to claim 6 is provided with an inspection exhaust gas passage into which combustion exhaust gas of the combustion device is introduced, and the inspection unburned component detection sensor is the inspection exhaust gas. Since it is configured to output a detection value according to the concentration of unburned components in the combustion exhaust gas introduced into the passage, an unburned component detection sensor for inspection is installed in the combustion exhaust gas passage of the combustion device to be inspected each time it is inspected. Can be inspected without setting, and can be inspected more efficiently and quickly.

According to a seventh aspect of the present invention, there is provided an inspection device for an unburned component detecting sensor, wherein the comparing and determining means sets the detected value of the unburned component detecting sensor and the detected value of the unburned component detecting sensor for inspection after starting combustion. Since it is configured to compare over a predetermined time, it is possible to inspect a series of correlations between changes in the detected value and changes in the unburned component concentration according to changes in the amount of unburned components generated, The reliability can be further enhanced.

Since the unburned component detecting sensor inspection apparatus according to claim 8 is provided with the notifying means for notifying that the determination result by the comparison determining means is negative,
It is easy to take necessary measures for the unburned component concentration detecting device whose determination result is negative.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an unburned component which outputs a detected value as a voltage value VA corresponding to a carbon monoxide concentration (hereinafter referred to as CO concentration) as an example of an unburned component concentration in a combustion exhaust gas. 1 shows a hot water supply apparatus A as an example of a combustion apparatus in which a catalytic combustion CO sensor SA as an example of a detection sensor is assembled.

The hot water supply apparatus A includes a combustion chamber 1 and a combustion chamber 1
A burner 2 provided in the interior of the engine, a heat exchanger 3 for heating water, an exhaust passage 4 connected to the upper part of the combustion chamber 1 for exhausting combustion exhaust gas of the burner 2 to the outside of the room, and a burner 2. A ventilation fan 5 that ventilates combustion air and discharges the combustion exhaust gas of the burner 2 through an exhaust passage 4, a water supply passage 6 that supplies heating water to the heat exchanger 3, and a heat exchanger 3 that is heated. A hot water supply passage 7 for supplying hot water to a hot water tap, a fuel supply passage 8 for supplying fuel gas from a general household gas supply pipe to the burner 2, and a control unit H for controlling the operation of the hot water supply device A. , Remote control device R and near the burner 2
An igniter 9 for ignition and a frame rod 10 for detecting that the burner 2 is ignited are provided.

A water supply amount sensor 11 for detecting the amount of water supplied to the heat exchanger 3 is provided in the water supply passage 6, and a hot water supply temperature sensor 1 for detecting the hot water supply temperature for the hot water tap is provided in the hot water supply passage 7.
2 is provided, and the fuel supply passage 8 is provided with an electromagnetic proportional valve V1 for adjusting the amount of fuel supplied to the burner 2 and an on-off valve V2 for intermittently supplying fuel.

The remote control device R is connected to the control unit H by wire or wirelessly, and includes an operating switch R1 for instructing the operation and stop of the hot water supply device A and a temperature setting switch R2 for setting a set target hot water supply temperature. Display lamps R3, R4, R5 for displaying information are provided.

The CO sensor SA has a CO detector SA1 mounted inside the combustion chamber 1 above the burner 2 and has a C
A detection circuit SA2 for connecting the detection output of the O detection unit SA1 to the bridge circuit state and outputting a detection value VA corresponding to the CO concentration is attached inside the casing 13 on the side of the combustion chamber 1. As shown in FIG. 2, the CO detection unit SA1 includes a sensor element S3 on a pedestal S2 of a protective frame S1 made of stainless steel.
And reference element S4 for temperature compensation and ambient temperature TA
Is provided with a temperature sensor S5 for detecting
2 is a lead wire connector S6 for inputting the detection outputs of these elements S3, S4 and the temperature sensor S5 to the detection circuit SA2.
Is provided.

The sensor element S3 and the reference element S
Reference numeral 4 denotes a platinum wire carrying a catalyst, and the sensor element S3 and the reference element S4 are connected in a bridge circuit state to the resistance elements S7 and S8 in the detection circuit SA2 as shown in FIG. ing. The sensor element S
3 and the reference element S4 are about 2 when current flows.
The unburned component which is heated to 00 ° C. and comes into contact with the surface thereof is burned by the catalytic action. At this time, the catalyst carried by the sensor element S3 has selectivity for CO, so that the sensor element S3 and the reference element As the element temperature differs from that of S4, and the resistance value of the platinum wire changes depending on the temperature, the greater the CO concentration in the combustion exhaust gas, the greater the difference in resistance value between the sensor element S3 and the reference element S4. . Then, the detected value VA corresponding to the CO concentration in the combustion exhaust gas is measured by the voltage value (unit: unit of connection between the sensor element S3 and the reference element S4 and the connection of the resistance element S7 and the resistance element S8 in the bridge circuit). Volt).

The detected value VA of the CO sensor SA is CO
It has a temperature characteristic that it changes according to the ambient temperature TA even if the concentration is the same, and FIG. 4 shows the temperature characteristic of the detected value VA0 when the CO concentration D is zero at the production and shipping stage. The detected value VA of the CO sensor SA increases in parallel with the detected value VA0 increasing as the CO concentration D increases. In FIG. 4, the ambient temperature TA
The range of 70 to 200 ° C corresponds to a region where the burner 2 is burning, and the range of 70 ° C or lower corresponds to a region where combustion of the burner 2 is stopped.

When the ambient temperature TA is fixed at a predetermined temperature, the CO concentration D and the detected value VA are as shown in FIG.
As shown in, there is a correlation represented by VA = αD + β, where α is the sensitivity of the CO sensor SA, β is the CO concentration D when the ambient temperature TA is a predetermined temperature, and when the CO concentration D is predicted to be zero. It is the detected value VA0.

The control unit H includes a remote control device R and a fan 5
, Water supply amount sensor 11, hot water supply temperature sensor 12, electromagnetic proportional valve V
1, a disconnecting valve V2, a CO sensor SA, and a temperature sensor S5 are connected to each other, and combustion control means 101 for controlling the combustion operation of the burner 2 and the operation of the fan 5 and the detected value V of the CO sensor SA
Incomplete combustion determination means 102 for determining an incomplete combustion state based on A, and a CO sensor SA installed in the hot water supply device A
In the map data format, the correlation between the CO concentration D and the detected value VA at the shipping stage and the temperature characteristic of the detected value VA0 when the CO concentration D is zero are generalized as a predetermined set correlation. A storage means 103 for storing and an integration timer 104 for integrating the combustion time of the burner 2 are provided.

The combustion control means 101 is configured to be switchable between a normal operation mode and an inspection operation mode. In the normal operation mode, the water supply amount sensor 1 is operated based on the operation of the hot water tap.
When the water supply amount detected by 1 reaches the set water amount, the ignition control of the burner 2 is executed to adjust the fuel supply amount of the burner 2 so that the hot water supply temperature becomes the set target hot water supply temperature.
The rotation speed of the fan 5 is controlled so that the rotation speed of the fan 5 becomes a target rotation speed set in advance for the fuel supply amount, and when the water supply amount becomes less than the set water amount, the combustion of the burner 2 is stopped. To control.

Further, in the inspection operation mode, when the water supply amount detected by the water supply amount sensor 11 reaches the set water amount, the ignition control of the burner 2 is executed to execute a predetermined inspection combustion state, that is, in the combustion exhaust gas. The combustion amount is controlled by controlling the fuel supply amount of the burner 2 and the rotation speed of the fan 5 so that the combustion state in which unburned components are easily generated, and the combustion of the burner 2 is stopped when a set time has elapsed from the start of combustion. Controlled.

The incomplete combustion determination means 102 detects the detected value VA of the CO sensor SA and the ambient temperature TA at that time.
Then, the CO concentration D is calculated based on the set correlation stored in the storage unit 103, and the state where the CO concentration D is equal to or higher than the set concentration (for example, 1000 ppm) is the set time (for example, 20 seconds). If the above is continued, it is determined that the incomplete combustion state has occurred, and the combustion control means 101 informs the incomplete combustion state by turning on the display lamp R5 and also performs a reset operation such as an OFF / ON operation of the power switch. The combustion operation of the burner 2 is controlled until the above is performed.

FIG. 6 shows a CO sensor inspection method and an inspection device B for inspecting the CO detection characteristics of the above-mentioned CO sensor (hereinafter referred to as the CO sensor to be inspected) SA in a state of being assembled in the hot water supply device A. The detected value corresponding to the CO concentration in the combustion exhaust gas is output as the voltage value VB, and the detected value VB
And the CO concentration D have substantially the same correlation as the above-mentioned set correlation, and the reference CO sensor SB as an unburned component detection sensor for inspection, and the CO sensor to be inspected according to the CO concentration in the combustion exhaust gas of the burner 2 The detected value VA of SA and the detected value VB of the reference CO sensor SB are compared to determine the CO sensor SA to be inspected.
Comparison determination means 14 for determining whether or not the correlation between the detected value VA and the CO concentration D is substantially the same as the set correlation,
A timer circuit 28 for measuring the elapsed time from the start of combustion for inspection, and a CO sensor SA to be inspected which has been checked in advance.
Keyboard 15 for inputting the temperature characteristic of the detected value VA in the state where the CO concentration D is zero and the CO sensor SA to be inspected
There are provided two kinds of indicator lights 16a and 16b as the notification means 16 which are turned on depending on whether the detection characteristic of the hot water is good or bad, and an exhaust gas passage 17 for inspection to which the exhaust passage 4 of the water heater A is detachably connected. There is.

The inspection exhaust gas passage 17 introduces the entire amount of the combustion exhaust gas discharged from the exhaust passage 4 and outputs it from the outlet 17.
CO sensor SA to be inspected
The reference CO sensor SB including the CO detection unit SB1 and the detection circuit SB2 having the same configuration as the above is installed in the inspection exhaust gas passage 17 by mounting the CO detection unit SB1 inside the inspection exhaust gas passage 17 near the outlet 17a. The detection value VB corresponding to the CO concentration in the combustion exhaust gas is output.

As shown in FIG. 7, the comparison / discrimination means 14 is a differential amplifier which outputs an output value VC corresponding to a deviation between a detection value VA of the CO sensor SA to be inspected and a detection value VB of the reference CO sensor SB. A deviation detection circuit 19 including 18 and a comparison circuit 20 for comparing whether or not the deviation is within an allowable range based on the output value VC of the differential amplifier 18, and a comparison result of the comparison circuit 20. Then, a comparison / determination circuit 21 for determining whether or not the detection characteristic of the CO sensor SA to be inspected is substantially the same as the set correlation is provided.

The temperature characteristic of the CO sensor SA to be inspected is input to the deviation detecting circuit 19 by the keyboard 15 in advance,
Based on the temperature characteristics and the ambient temperature TA input from the CO sensor SA to be inspected and the ambient temperature TB output from the reference CO sensor SB, the CO concentration D of the CO sensor SA to be inspected at the ambient temperature TA is zero. Based on the detection value VA0 set by the setting device 22 and the setting value 22 set by this setting device 22, the detection value VB0 in the state where the CO concentration D of the reference CO sensor SB at the ambient temperature TB is zero is An adding circuit 23 for correcting the CO concentration D of the CO sensor SA to be inspected to be equal to the detected value VA0 in the state of zero is provided. With the detected value VA0 of the sensor SA and the detected value VB0 of the reference CO sensor SB being the same, the detected value VA of the CO sensor SA to be inspected, which is generated as the CO concentration D increases, It is configured to detect a deviation VC between the detection value VB of the quasi-CO sensor SB.

In the hot water supply device A, the exhaust passage 4 is connected to the exhaust gas passage 17 for inspection, the fuel supply passage 8 is connected to the gas supply pipe, and the CO sensor to be inspected assembled in the hot water supply device A is connected. The detected value VA of SA is the deviation detection circuit 1
9 is set so that it is connected to the inspection device B so as to be input.

Then, the control section H is energized to switch to the inspection operation mode, and the inspected C which has been previously examined.
When the temperature characteristic of the detected value VA0 in the state where the CO concentration D of the O sensor SA is zero is input by the keyboard 15 and a predetermined amount of water is supplied to the water supply passage 6, the operation in the inspection operation mode is started, and as shown in FIG. As shown in the figure, the output value VC corresponding to the deviation between the detected value VA of the CO sensor SA to be inspected and the detected value VB of the reference CO sensor SB is output from the differential amplifier 18 in response to the elapsed time t from the start of the operation. The comparator circuit 20 outputs the output value VC and the upper limit reference voltage value VU input from the upper limit reference voltage circuit 24 to the upper limit comparator 25.
In addition, the output value VC is compared with the lower limit reference voltage value VL input from the lower limit reference voltage circuit 26 by the lower limit comparator 27.

From the start of combustion, the comparison / determination circuit 21
The set time measured by the timer circuit 28 (for example, about 3
The output of the upper limit comparator 25 and the lower limit comparator 27 is monitored until the time (min.) Has elapsed, and if the deviation thereof, that is, the output value VC of the differential amplifier 18 exceeds a set allowable range (for example, ± 0.4 V). , Its inspected CO sensor S
When the correlation between the detected value VA of A and the CO concentration D is different from the set correlation by exceeding the allowable range and it is determined that the detection characteristic is defective, the defect indicator lamp 16a is turned on,
If the deviation does not exceed the set allowable range, it is determined that the correlation between the detected value VA of the CO sensor SA to be inspected and the CO concentration D is substantially the same as the set correlation and the detection characteristic is good. Then, the good indicator lamp 16b is turned on.

Other Embodiments 1. The unburned component detection sensor for inspection may be detachably attached to the exhaust passage of the combustion exhaust gas of the combustion device each time the inspection is performed. 2. The unburned component detection sensor is not limited to the catalytic combustion type CO sensor, and may be a semiconductor type CO sensor or an oxygen sensor that detects an unburned component based on the amount of oxygen in the combustion exhaust gas. In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the attached drawings.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a water heater.

FIG. 2 is a sectional view of a CO sensor

FIG. 3 is a circuit configuration diagram of a CO sensor

FIG. 4 is a detection value V of the CO sensor when the CO concentration is zero.
Graph showing the correlation between A and ambient temperature TA

FIG. 5 is a graph showing the correlation between the detected value VA of the CO sensor and the CO concentration D when the ambient temperature TA is constant.

FIG. 6 is a schematic diagram of an inspection device.

FIG. 7 is a block diagram of comparison / determination means.

FIG. 8 is a graph explaining the output state of the differential amplifier.

[Explanation of symbols]

 14 Comparison / determination means 16 Notification means 17 Exhaust gas passage for inspection A Combustion device D Unburned component concentration H Control means SA Unburned component detection sensor SB Unburned component detection sensor for inspection VA Detection value VB detection value

Claims (8)

[Claims] 1. An unburned component detection sensor (S) which outputs a detection value (VA) according to the concentration (D) of unburned component in combustion exhaust gas.
The detection characteristics of (A) are compared with the detection value (VA) of the unburned component detection sensor (SA).
Combustion provided with control means (H) for controlling the combustion state according to the unburned component concentration (D) based on the preset detection value and the set correlation of the unburned component concentration (D) A method for inspecting an unburned component detection sensor that is inspected in a state of being assembled in a device (A), wherein a detection value (V
B) is output, and an inspection unburned component detection sensor (SB) is provided, in which the correlation between the detected value (VB) and the unburned component concentration (D) is substantially the same as the set correlation. Detection value (VA) of the unburned component detection sensor (SA) according to the concentration (D) of unburned component in the combustion exhaust gas of the combustion device (A) and detection value of the inspection unburned component detection sensor (SB) (VB) to determine whether the correlation between the detection value (VA) of the unburned component detection sensor (SA) and the unburned component concentration (D) is substantially the same as the set correlation. Inspection method of unburned component detection sensor to determine. 2. An inspection exhaust gas passage (17) into which combustion exhaust gas from the combustion device (A) is introduced, and an unburned component concentration (D) in the combustion exhaust gas introduced into the inspection exhaust gas passage (17). ) Corresponding to the unburned component detection sensor for inspection (S
B) detection value (VB) and the unburned component detection sensor (SA
3. The method for inspecting an unburned component detection sensor according to claim 1, wherein the detection value (VA) is compared. 3. The detection value (VA) of the unburned component detection sensor (SA) and the detection value (VB) of the inspection unburned component detection sensor (SB) are compared over a predetermined time after the start of combustion. The method for inspecting the unburned component detection sensor according to claim 1 or 2. 4. The unburned component detection sensor according to the unburned component concentration (D) in the combustion exhaust gas at that time when the combustion device (A) is burned in a state where unburned components are easily generated. 3. The detection value (VA) of SA) is compared with the detection value (VB) of the inspection unburned component detection sensor (SB).
The inspection method of the unburned component detection sensor according to 2 or 3. 5. An unburned component detection sensor (S) that outputs a detection value (VA) according to the concentration (D) of unburned component in the combustion exhaust gas.
The detection characteristics of (A) are compared with the detection value (VA) of the unburned component detection sensor (SA).
Combustion provided with control means (H) for controlling the combustion state according to the unburned component concentration (D) based on the preset detection value and the set correlation of the unburned component concentration (D) An inspection device for an unburned component detection sensor that is inspected in a state of being attached to the device (A), and a detection value (V
B) is output, and the correlation between the detected value (VB) and the unburned component concentration (D) is substantially the same as the set correlation described above; Detection value (VA) of the unburned component detection sensor (SA) and detection value (SB) of the unburned component detection sensor (SB) according to the concentration (D) of unburned component in the combustion exhaust gas of the device (A) VB) to determine whether the correlation between the detection value (VA) of the unburned component detection sensor (SA) and the unburned component concentration (D) is substantially the same as the set correlation. An inspection device for an unburned component detection sensor, which is provided with a comparison and determination means (14). 6. An inspection exhaust gas passage (17) is provided through which combustion exhaust gas of the combustion device (A) is introduced, and the inspection unburned component detection sensor (SB) is provided in the inspection exhaust gas passage (17). The inspection device for an unburned component detection sensor according to claim 5, which is configured to output a detection value (VB) according to the concentration (D) of unburned component in the combustion exhaust gas introduced into the above. 7. The comparison / determination means (14) burns a detection value (VA) of the unburned component detection sensor (SA) and a detection value (VA) of the inspection unburned component detection sensor (SA). The unburned component detection sensor inspection device according to claim 5 or 6, which is configured to perform comparison over a predetermined time after the start. 8. An informing means (16) for informing that when the determination result by the comparison determining means (14) is negative.
The inspection device for the unburned component detection sensor according to claim 5, 6 or 7, further comprising: